CN111550456B - Hydraulic control system for emergency release device - Google Patents
Hydraulic control system for emergency release device Download PDFInfo
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- CN111550456B CN111550456B CN202010385658.4A CN202010385658A CN111550456B CN 111550456 B CN111550456 B CN 111550456B CN 202010385658 A CN202010385658 A CN 202010385658A CN 111550456 B CN111550456 B CN 111550456B
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- 230000009471 action Effects 0.000 claims abstract description 19
- 239000003921 oil Substances 0.000 claims description 239
- 230000033001 locomotion Effects 0.000 claims description 46
- 239000010720 hydraulic oil Substances 0.000 claims description 22
- 239000010729 system oil Substances 0.000 claims description 21
- 230000002457 bidirectional effect Effects 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000011065 in-situ storage Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 230000001276 controlling effect Effects 0.000 description 11
- 238000000926 separation method Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 6
- 210000001503 joint Anatomy 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/022—Installations or systems with accumulators used as an emergency power source, e.g. in case of pump failure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/07—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors in distinct sequence
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
- F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/78—Control of multiple output members
- F15B2211/783—Sequential control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic control system for an emergency release device, which comprises a first part and a second part which are movably connected, wherein the first part and the second part are respectively arranged on a loading arm and a ship; the system comprises: the device comprises a one-way valve, a first reversing valve, a two-way balance valve, a driving oil cylinder, a disengaging oil cylinder, a second reversing valve, a third reversing valve and a fourth reversing valve. When the loading and unloading arm normally works, the hydraulic control system of the emergency disengaging device is in a standby state, under emergency conditions, the first component can be independently closed or opened, during disengaging operation, the first component and the second component in the emergency disengaging device are simultaneously closed and disengaged from each other, and the cylinder rod of the disengaging oil cylinder retracts under the action of pressure oil after emergency disengaging, so that interference during disengaging is avoided. The invention can realize the safe and reliable work of the emergency release device according to different working condition requirements, and ensure the safety of the operation process of the loading and unloading arm for the ship.
Description
Technical Field
The invention belongs to the field of intelligent loading and unloading, in particular to the technical field of emergency release hydraulic control, and particularly relates to a hydraulic control system for an emergency release device.
Background
At present, with the rapid increase of energy import amounts of petroleum, natural gas and the like, the use of marine loading and unloading arms is becoming more popular, and the safety of the loading and unloading arms in the use process is also becoming more important. In order to prevent dangerous situations, such as ship drifting out of a normal envelope range, the loading and unloading arm is damaged and environmental pollution is caused. Therefore, the emergency release device is increasingly applied to the loading arm of the ship, and the requirements on the safety and reliability of the emergency release device control system are also increasing.
The existing emergency disengaging device usually adopts two oil cylinders to respectively control emergency disengaging actions, wherein one oil cylinder controls the closing of the first component and the second component, the other oil cylinder controls the opening of the anchor ear, the disengaging of the first component and the second component is realized, the two oil cylinders are not mechanically interlocked in action, and the action sequence between the two oil cylinders is controlled through a travel switch or a sensor. This way of passing through a travel switch or sensor additionally adds a point of failure to the emergency release mechanism. The hydraulic control system capable of realizing safe and reliable operation of the emergency release device according to different working conditions has important significance.
Disclosure of Invention
The invention aims to provide a safe, stable and reliable hydraulic control system for an emergency release device, which aims at the requirement that the emergency release device on a loading and unloading arm for a ship can safely and reliably work under different working condition requirements.
The technical solution for realizing the purpose of the invention is as follows: a hydraulic control system for an emergency release device, wherein the emergency release device comprises a first part and a second part which are movably connected; the system comprises: the device comprises a one-way valve, a first reversing valve, a two-way balance valve, a driving oil cylinder, a disengaging oil cylinder, a second reversing valve, a third reversing valve and a fourth reversing valve;
The driving oil cylinder and the disengaging oil cylinder are hydraulic power actuating mechanisms, wherein the telescopic movement of a cylinder rod in the driving oil cylinder realizes the opening or closing of the first component so as to open or close an external channel of the first component; the first component and the second component are closed and separated by the telescopic movement of the cylinder rod in the separating oil cylinder;
the one-way valve is arranged at the inlet of the pressure oil source P and has a one-way stop function, and the pressure oil source P supplies oil to the hydraulic control system through the one-way valve and is blocked in the reverse direction;
The first reversing valve is used for ensuring that the driving oil cylinder keeps in-situ and does not act when the device attached by the emergency release device is in normal operation; when the device attached by the emergency release device is in an alarm state or the alarm state is released, the cylinder rod of the driving oil cylinder is controlled to perform telescopic movement, and the first component is driven to be closed or opened;
the bidirectional balance valve is arranged between the first reversing valve and the large and small cavity hydraulic circuits of the driving oil cylinder and is used for realizing locking or opening of the large and small cavity hydraulic circuits of the driving oil cylinder;
The second reversing valve is arranged between the fourth reversing valve and the large-cavity hydraulic loop of the disengaging oil cylinder and is used for opening or closing disengaging operation of the emergency disengaging device;
the third reversing valve is used for controlling a cylinder rod of the driving oil cylinder to perform telescopic movement when the emergency disengaging device is disengaged and opened, so as to drive the first component to be closed; when the emergency disengaging device is closed during disengaging operation, the driving oil cylinder is not operated, so that the driving oil cylinder is ensured to keep the working position unchanged;
The fourth reversing valve is used for controlling a cylinder rod of the disengaging oil cylinder to perform telescopic movement when the disengaging operation of the emergency disengaging device is started, and driving the first component and the second component to be closed and separating the two components; when the emergency release device is released or closed, the cylinder rod for controlling the release cylinder is restored to the original state.
Further, the system also comprises an energy accumulator which is used as an emergency power source and supplies oil to the hydraulic control system when the pressure oil source P is absent; the oil in the accumulator is provided by a source of pressurized oil P and the accumulator does not leak under the action of the non-return valve.
Further, the first reversing valve is used for ensuring that the driving oil cylinder keeps in-situ and does not act, and is used for controlling a cylinder rod of the driving oil cylinder to perform telescopic movement, so as to drive the first component to be closed or opened, and the method is specifically realized as follows: when the device attached by the emergency release device is in normal operation, the first reversing valve enables the large cavity and the small cavity of the driving oil cylinder to be communicated, and the driving oil cylinder does not act; when the device attached by the emergency release device is in an alarm state, a large cavity of the driving oil cylinder is connected with a system oil return T, a hydraulic oil source P acts on a small cavity of the driving oil cylinder through a first reversing valve, a cylinder rod of the driving oil cylinder performs retraction movement, and a first component is driven to be closed; when the alarm state of the device attached to the emergency release device is released, the small cavity of the driving oil cylinder is connected with the system oil return T, the hydraulic oil source P acts on the large cavity of the driving oil cylinder through the first reversing valve, the cylinder rod of the driving oil cylinder stretches out, and the first component is driven to be opened.
Further, the first reversing valve specifically adopts a three-position four-way electric proportional reversing valve, and the middle position energy is Y-shaped.
Further, the second reversing valve adopts a manual reversing valve.
Further, the second reversing valve adopts a two-position two-way manual reversing valve, when the disengagement operation of the emergency disengagement device is closed, the working position of the two-position two-way manual reversing valve is in one-way conduction, hydraulic pressure oil can only flow out from the large cavity of the disengagement oil cylinder, and the hydraulic pressure oil is blocked in the reverse direction.
Further, the third reversing valve is used for controlling the cylinder rod of the driving oil cylinder to perform telescopic movement, driving the first component to be closed, and ensuring that the driving oil cylinder keeps the working position unchanged, and is specifically realized as follows: the third reversing valve is arranged between the large cavity of the driving oil cylinder and the system oil return T, and when the emergency disengaging device is disengaged and started, the system oil return T is communicated with the large cavity of the driving oil cylinder through the third reversing valve 8, the cylinder rod of the driving oil cylinder performs retraction movement, and the first component is driven to be closed; when the emergency disengaging device is closed during disengaging operation, the system oil return T is isolated from the large cavity of the driving oil cylinder through a third reversing valve.
Further, the third reversing valve specifically adopts a hydraulic control reversing valve, and the control oil port K of the third reversing valve is communicated with a large-cavity hydraulic circuit of the disengaging oil cylinder.
Further, the fourth reversing valve is used for controlling the cylinder rod of the disengaging oil cylinder to perform telescopic movement, driving the first component and the second component to be closed and disengaging the two components, and controlling the cylinder rod of the disengaging oil cylinder to recover to an initial state, and is specifically realized as follows: when the emergency disengaging device is opened in disengaging operation, the pressure oil source P acts on a large cavity of the disengaging oil cylinder through a fourth reversing valve and a second reversing valve, and a cylinder rod of the disengaging oil cylinder stretches out to drive the first component and the second component to be closed and the two components to be separated; when the emergency disengaging device is in disengaging operation or closed, the pressure oil source P acts on the small cavity of the disengaging oil cylinder through the fourth reversing valve, and the cylinder rod of the disengaging oil cylinder performs retracting movement.
Further, the fourth reversing valve (9) adopts a two-position four-way electromagnetic reversing valve.
Compared with the prior art, the invention has the remarkable advantages that: 1) The first component can be independently closed or opened, the first component and the second component in the emergency release device can be simultaneously closed and mutually released during release operation, and the cylinder rod of the release cylinder retracts under the action of pressure oil after emergency release, so that interference during release is avoided; 2) The driving oil cylinder and the disengaging oil cylinder mechanism have locking relation, namely before the first part and the second part are not closed, the cylinder rod of the disengaging oil cylinder cannot extend out to open the anchor ear, so that misoperation of the disengaging oil cylinder is avoided in mechanical structure; 3) The third reversing valve is arranged between the large cavity of the driving oil cylinder and the system oil return T, and when the emergency disengaging device is disengaged and started, the system oil return T is communicated with the large cavity of the driving oil cylinder through the third reversing valve, the cylinder rod of the driving oil cylinder performs retraction movement, and the first component is driven to be closed; when the emergency disengaging device is disengaged from the operation and closed, the system oil return T is isolated from the large cavity of the driving oil cylinder through the third reversing valve, so that the hoop is opened after the first component is reliably closed under emergency conditions, and resources are not wasted; 4) The energy accumulator is used as an emergency power source, oil is supplied to the hydraulic control system when the pressure oil source P is lost, the emergency release action can be reliably executed, the energy accumulator is not drained under the action of the one-way valve, the frequency of frequently starting the hydraulic station to supplement the oil for the energy accumulator is reduced, and the service life of each part is prolonged; 5) The bidirectional balance valve can automatically adjust the opening of the valve core, keeps the motion process of the driving oil cylinder stable and impact-free, and effectively relieves the damage caused by liquid impact to a structural member when a part is suddenly closed or opened when the loading and unloading arm pipeline is used for conveying liquid; 6) The second reversing valve adopts a manual reversing valve, so that the emergency disengaging device can not cause disengaging accidents due to misoperation when the loading and unloading arm is in normal operation.
The invention is described in further detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of a hydraulic control system for an emergency release device in one embodiment.
Fig. 2 is a structural isometric view of a marine boom emergency release device in one embodiment.
Fig. 3 is a structural elevation view of a marine cargo arm emergency release device in one embodiment.
Fig. 4 is a front exploded view of the marine boom emergency release apparatus in one embodiment with the upper and lower links removed.
FIG. 5 is an enlarged view of the contact of the upper link with the upper swivel rocker of the marine cargo arm emergency release device, in one embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
In one embodiment, a hydraulic control system is provided for an emergency release device on a marine cargo arm, the emergency release device comprising a first part and a second part movably connected; the hydraulic control system includes: the check valve 21, the first directional valve 23, the two-way balance valve 24, the drive cylinder 11, the disengagement cylinder 10, the second directional valve 27, the third directional valve 28, and the fourth directional valve 29.
Here, for the ship loading arm, the first member and the second member are mounted on the loading arm and the ship, respectively. Further, aiming at the marine oil transportation operation, the oil pipeline of the loading arm is in butt joint with the first component, the oil pipeline of the ship is in butt joint with the second component, the two components are respectively opened with external channels and are in butt joint with each other, the butt joint of the two oil pipelines can be realized, and the oil transportation operation is further realized.
The driving oil cylinder 11 and the disengaging oil cylinder 10 are hydraulic power executing mechanisms, wherein the telescopic movement of a cylinder rod in the driving oil cylinder 11 realizes the opening or closing of the first component so as to open or close an external channel of the first component; the telescopic movement of the cylinder rod in the disengaging oil cylinder 10 realizes the closing of the first component and the second component and the separation of the two components;
The one-way valve 21 is arranged at the inlet of the pressure oil source P and has a one-way stop function, and the pressure oil source P supplies oil to the hydraulic control system through the one-way valve 21 and is reversely stopped;
The first reversing valve 23 is used for ensuring that the driving oil cylinder 11 keeps in-situ and does not act when the device attached by the emergency release device is in normal operation; when the device attached by the emergency release device is in an alarm state or the alarm state is released, the device is used for controlling the cylinder rod of the driving oil cylinder 11 to perform telescopic movement so as to drive the first component to be closed or opened;
here, the attached device is a loading arm for a ship.
The bidirectional balance valve 24 is arranged between the first reversing valve 23 and the large and small cavity hydraulic circuits of the driving oil cylinder 11, and is used for realizing locking or opening of the large and small cavity hydraulic circuits of the driving oil cylinder 11;
Here, the locking means ensuring that the drive cylinder 11 remains in place without being actuated, whereby the first member can be reliably maintained in the original operating state; the cylinder rod of the drive cylinder 11 is opened to perform telescopic movement.
Here, the opening degree of the valve core can be automatically adjusted by adopting the bidirectional balance valve 24, so that the movement process of the driving oil cylinder 11 is kept stable and impact-free, and the damage caused by the impact of the liquid on the structural member when the first component is suddenly closed or opened when the loading and unloading arm pipeline is used for conveying the liquid is effectively relieved.
Here, the bidirectional balance valve 24 may be replaced by a combination of a bidirectional hydraulic lock and a unidirectional speed regulation valve group, where the bidirectional hydraulic lock is disposed between the first reversing valve 23 and the large and small cavity hydraulic circuits of the driving oil cylinder 11, and is used for locking or unlocking the large and small cavity hydraulic circuits of the driving oil cylinder 11; the one-way speed regulating valve group comprises at least one-way speed regulating valve, is arranged on a large-cavity hydraulic circuit and a small-cavity hydraulic circuit of the driving oil cylinder 11 and is used for regulating the flow of hydraulic oil entering the driving oil cylinder 11 so as to control the movement speed of the driving oil cylinder 11. This approach, while achieving nearly the same effect as the two-way balancing valve 24, makes the system more complex.
The second reversing valve 27 is disposed between the fourth reversing valve 29 and the large-cavity hydraulic circuit of the disengagement cylinder 10, and is used for opening or closing the disengagement operation of the emergency disengagement device;
The third reversing valve 28 is used for controlling the cylinder rod of the driving cylinder 11 to perform telescopic movement to drive the first component to be closed when the emergency release device is released and is opened; when the emergency disengaging device is closed during disengaging operation, the driving oil cylinder 11 is not operated, so that the driving oil cylinder 11 is ensured to keep the working position unchanged;
the fourth reversing valve 29 is used for controlling the cylinder rod of the disengaging cylinder 10 to perform telescopic movement when the disengaging operation of the emergency disengaging device is started, and driving the first component and the second component to be closed and separating the two components; when the emergency release device release operation is ended or closed, the cylinder rod for controlling the release cylinder 10 is restored to the original state.
Here, the cylinder rod of the release cylinder 10 is returned to the original state, so that interference during release can be avoided, and dangerous situations such as damage to the loading arm can be avoided.
Further, in one embodiment, the hydraulic control system further includes an accumulator 22 as an emergency power source for supplying oil to the hydraulic control system when the pressure oil source P is absent; the oil in the accumulator 22 is provided by a source of pressure oil P and the accumulator 22 is not drained under the action of the non-return valve 21.
Here, the pressure oil source P partially acts on the P port of the first directional valve 23 to be on standby, and partially supplies the accumulator 22 with oil. When the pressure oil source P is not supplied, the pressure oil of the accumulator 22 is ensured not to leak due to the unidirectional cut-off function of the unidirectional valve 21, the pressure oil is always filled, and the P port of the first reversing valve always keeps the pressure oil.
By adopting the scheme of the embodiment, the power source can be ensured to exist at any time, and the system can be ensured to continuously and stably work.
Further, in one embodiment, the first reversing valve 23 is configured to ensure that the driving cylinder 11 remains in the normal position and does not act, and is configured to control the cylinder rod of the driving cylinder 11 to perform telescopic movement, so as to drive the first component to be closed or opened, which is specifically implemented as follows: when the device attached by the emergency release device is in normal operation, the first reversing valve 23 enables the large cavity and the small cavity of the driving oil cylinder 11 to be communicated, and the driving oil cylinder 11 does not act; when the device attached by the emergency release device is in an alarm state, a large cavity of the driving oil cylinder 11 is connected with a system oil return T, a hydraulic oil source P acts on a small cavity of the driving oil cylinder 11 through a first reversing valve 23, a cylinder rod of the driving oil cylinder 11 performs retraction movement, and a first part is driven to be closed; when the alarm state of the device attached to the emergency release device is released, the small cavity of the driving oil cylinder 11 is connected with the system oil return T, the hydraulic oil source P acts on the large cavity of the driving oil cylinder 11 through the first reversing valve 23, the cylinder rod of the driving oil cylinder 11 stretches out, and the first component is driven to be opened.
Further alternatively, in one embodiment, the first reversing valve 23 is a three-position four-way electric proportional reversing valve, and the central position of the valve can be Y-shaped. When the attached device is in an alarm state or the alarm state is released, the hydraulic control system sends a control signal to the first reversing valve 23, and the valve controls the cylinder rod of the driving oil cylinder 11 to perform telescopic movement so as to drive the first component to be closed or opened.
Further alternatively, in one embodiment, the first reversing valve 23 is a three-position four-way electromagnetic reversing valve, and the central position of the valve can be Y-shaped.
It is further preferred that in one of the embodiments, the second reversing valve 27 is a manual reversing valve.
The manual reversing valve can reduce false alarm rate, further improve safety and reliability, and the emergency release device is manually opened after being manually confirmed, so that unnecessary loss caused by the fact that a full-automatic system automatically triggers the release operation of the emergency release device when false alarm occurs can be avoided; and can avoid the accident of detachment caused by misoperation.
Here, the second directional valve 27 may be an electromagnetic directional valve, but the false alarm rate thereof may be relatively high, as described in detail in the above analysis.
Further alternatively, in one embodiment, the second reversing valve 27 is a two-position two-way manual reversing valve, and when the disengagement operation of the emergency disengagement apparatus is closed, the working position of the two-position two-way manual reversing valve is one-way on, and hydraulic pressure oil can only flow out from the large cavity of the disengagement cylinder 10, and is blocked in the opposite direction.
Here, the working position is one-way conduction, so that the emergency release device can not generate release accidents due to misoperation when the loading and unloading arm is in normal operation.
Further, in one embodiment, the third reversing valve 28 is configured to control the cylinder rod of the driving cylinder 11 to perform telescopic movement, drive the first component to close, and ensure that the working position of the driving cylinder 11 is kept unchanged, and is specifically implemented as follows: the third reversing valve 28 is arranged between the large cavity of the driving oil cylinder 11 and the system oil return T, and when the emergency disengaging device is disengaged and operated and started, the system oil return T is communicated with the large cavity of the driving oil cylinder 11 through the third reversing valve 28, the cylinder rod of the driving oil cylinder 11 performs retraction movement, and the first component is driven to be closed; when the emergency release device is closed during release operation, the system oil return T is isolated from the large cavity of the driving oil cylinder 11 through the third reversing valve 28.
Further alternatively, in one embodiment, the third reversing valve 28 is a hydraulic control reversing valve, and the control port K of the hydraulic control reversing valve is in communication with the large-cavity hydraulic circuit of the disengaging cylinder 10.
Further alternatively, in one embodiment, a solenoid directional valve may be used on the third directional valve 28, and the emergency device may disengage the control signal control.
Further alternatively, in one embodiment, the third reversing valve 28 is a two-position, two-way solenoid reversing valve.
Further, in one embodiment, the fourth reversing valve 29 is configured to control the cylinder rod of the disengagement cylinder 10 to perform telescopic movement, drive the first component and the second component to close and disengage, and control the cylinder rod of the disengagement cylinder 10 to restore to an initial state, specifically: when the emergency disengaging device is opened in disengaging operation, the pressure oil source P acts on the large cavity of the disengaging oil cylinder 10 through the fourth reversing valve 29 and the second reversing valve 27, and the cylinder rod of the disengaging oil cylinder 10 stretches out to drive the first part and the second part to be closed and the two parts to be separated; when the emergency release device release operation is completed or closed, the pressure oil source P acts on the small chamber of the release cylinder 10 through the fourth directional valve 29, and the cylinder rod of the release cylinder 10 performs the retracting motion.
Here, the extension movement of the cylinder rod out of the cylinder 10, driving the first member to be closed, may be implemented as follows: if the cylinder rod of the driving cylinder 11 does not completely close the first component in place, the cam mechanism of the first component is driven by the cylinder rod of the disengaging cylinder 10 to further retract the cylinder rod of the driving cylinder 11, so that the first component is completely closed.
Here, the extension movement of the cylinder rod out of the cylinder 10, driving the second member to be closed, may be implemented as follows: the cylinder rod of the disengaging cylinder 10 drives the second member to close through the link mechanism.
Here, the extension movement of the cylinder rod of the disengaging cylinder 10, driving the two components to be separated, may be implemented as follows: the cylinder rod of the disengaging cylinder 10 is opened by a device for connecting the two parts through a link mechanism, so that the separation of the two parts is realized, the first part is left on the loading and unloading arm, and the second part is left on the ship.
Further alternatively, in one embodiment, the fourth reversing valve 29 is a two-position four-way electromagnetic reversing valve.
Further, as a specific example, the hydraulic control system for an emergency release device of the present invention will be further described with reference to fig. 1 and 2:
Fig. 2 to 5 show an emergency release device, which comprises a low-temperature upper ball valve 1, a low-temperature lower ball valve 2, a valve hoop 5, a release cylinder 10, a driving cylinder 11, a release cylinder 10 and a hydraulic control system of the driving cylinder 11;
A disconnection flange sealing ring 3 is arranged between the low-temperature upper ball valve 1 and the low-temperature lower ball valve 2, the low-temperature upper ball valve 1 is arranged on an LNG ship loading and unloading arm, and the lower ball valve 2 is arranged on an LNG receiving station; the low-temperature upper ball valve 1 is fixedly provided with a hoop support 4, one ends of two valve hoops 5 are connected with the hoop support 4 through a rotating shaft, the two valve hoops 5 clamp a disconnecting flange sealing ring 3 between the two ball valves, and the other ends of the two valve hoops 5 are connected through a clamping rod 6; one end of the clamping rod 6 is connected with one valve hoop 5 through a rotating shaft, the other end of the clamping rod is inserted from a bottom slot of the other valve hoop 5, and the clamping rod is fixed through a clamping nut 7 and further fastened through a locking nut 8; a driving fixing frame 12 is fixed on the low-temperature upper ball valve 1, and the disengaging oil cylinder 10 and the driving oil cylinder 11 are both fixed on the driving fixing frame 12; an upper push rod 13 is arranged on the disengaging oil cylinder 10, and a lower push rod 14 is arranged at the lower part of the upper push rod 13; the back parts of the upper push rod 13 and the lower push rod 14 are fixedly connected with a push rod 13-1; the low-temperature upper ball valve 1 and the low-temperature lower ball valve 2 are respectively provided with a rotary rocker 17; the two rotary rockers 17 are respectively connected with the valve core rotating shafts 15 of the low-temperature upper ball valve 1 and the low-temperature lower ball valve 2; the driving oil cylinder 11 is connected with one end of an upper end rotating rocker 17 through a rotating shaft; the other end of the upper end rotating rocker 17 is contacted with the lower end of the upper end push rod 13-1; the lower end rotating rocker 17 is contacted with the lower end of the lower end push rod 13-1; a push block 18 is arranged between the upper push rod 13 and the lower push rod 14, and the push block 18 is used for pushing the clamping rod 6 when the driving oil cylinder 11 descends. The upper push rod 13-1 is in contact connection with the upper rotary rocker 17 to form a space for avoiding the position, and when the upper rotary rocker 17 is driven to rotate by the driving oil cylinder 11, the other end of the upper rotary rocker 17 can freely rotate downwards at the lower end of the upper push rod 13-1 without interference with the upper push rod 13. When the oil cylinder 10 is separated from the lower part, the upper push rod 13 can push the upper rotary rocker 17 to rotate through the upper push rod 13-1.
The push block 18 can be fixedly connected with the upper push rod 13 or fixedly connected with the lower push rod 14; when the push rod is fixedly connected with the upper push rod 13, the lower end of the push block 18 is in contact connection with the upper end of the lower push rod 14, and when the push rod is fixedly connected with the lower push rod 14, the upper end of the push block 18 is in contact connection with the upper push rod 13.
Further, the emergency disengaging device further comprises an upper valve position sensor, a lower valve position sensor and a disengaging signal sensor, wherein the upper valve position sensor is arranged on a rotary rocker 17 at the upper end and is used for independently detecting the on-off state of the low-temperature upper ball valve 1, and detection is realized by arranging induction electromagnetic valves at two rotation limit positions; the lower valve position sensor is arranged on the driving fixing frame 12, and the position of the push rod is detected by arranging an induction electromagnetic valve at the limit position of the push rod, so that the switching state of the ball valve 2 at low temperature is detected. The disengaging signal sensor is arranged on the inner side of the other end of the valve anchor ear 5 and is used for detecting the opening and closing states of the two anchor ear valves 5 so as to realize the feedback of disengaging signals;
Further, a shearing pin 9 is arranged on the clamping rod 6, the shearing pin 9 is inserted into the clamping rod 6 and the other valve hoop 5, and is used as an anti-falling component of the clamping rod 6 to prevent the clamping rod 6 from falling off in a normal operation stage, and the shearing pin 9 can be sheared by pushing the clamping rod 6 through the pushing block 18 during separation operation.
Further, a disconnection stud 16 is further provided between the rotary rocker 17 at the lower end and the valve body of the low-temperature ball valve 2, the disconnection stud 16 is used for limiting the position of the low-temperature ball valve 2, the effect of preventing misoperation is achieved, and when the low-temperature ball valve 2 is opened in an emergency state, the rotary rocker 17 at the lower end rotates to cut off the disconnection stud 16.
With reference to fig. 1, the hydraulic control system of the emergency release apparatus shown in fig. 2 includes:
Check valve 21: the one-way valve 21 is arranged on an inlet of a hydraulic oil source of the hydraulic control system, has a one-way stop function, and supplies oil to the hydraulic control system of the emergency release device through the one-way valve 21 from outside hydraulic oil P, and is blocked in the reverse direction. Part of external hydraulic oil P acts on the P port of the electromagnetic directional valve to stand by, and part of external hydraulic oil P supplies oil to the accumulator 22. When external hydraulic oil P is not supplied, the pressure oil of the accumulator 22 is not leaked due to the unidirectional cut-off function of the unidirectional valve, and the P port of the electromagnetic directional valve always keeps the pressure oil;
an accumulator 22: the accumulator 22 serves as an emergency power source and has a function of storing hydraulic pressure oil. When the loading and unloading arm works normally, part of pressure oil P in the hydraulic system is supplied to the energy accumulator 22 to serve as an emergency power source, so that when the hydraulic oil source P is absent, the hydraulic control system still has the emergency power source to ensure that the emergency release works reliably;
Three-position four-way electric proportional reversing valve 23: the three-position four-way electric proportional reversing valve 23 is a hydraulic control element of the driving oil cylinder 11 in the emergency disengaging device. As shown in fig. 1, the hydraulic pressure oil source acts on the P port of the three-position four-way electric proportional reversing valve 23, the valve core of the three-position four-way electric proportional reversing valve is in the middle position, at this time, the A, B ports of the electromagnetic valve are unloaded, and the driving oil cylinder 11 keeps in-situ and does not act. When the electromagnet at the left side of the three-position four-way electric proportional reversing valve 23 is electrified and the valve core is at the left position, hydraulic oil P acts on a large cavity of the driving oil cylinder 11, a cylinder rod of the driving oil cylinder 11 stretches out, and an upper ball valve of the emergency release device is driven to be opened. When the electromagnet on the right side of the three-position four-way electric proportional reversing valve 23 is electrified and the valve core is at the right position, hydraulic oil P acts on a small cavity of the driving oil cylinder 11, a cylinder rod of the driving oil cylinder 11 performs retraction movement, and an upper ball valve of the emergency release device is driven to be closed.
Two-way balancing valve 24: the bidirectional balance valve 24 is arranged between the three-position four-way electric proportional reversing valve 23 and the large and small cavity hydraulic circuits of the driving oil cylinder 11. When the three-position four-way electric proportional reversing valve 23 does not act, namely the valve core is in a neutral unloading state, the bidirectional balance valve 24 can realize the locking of a large-cavity hydraulic circuit and a small-cavity hydraulic circuit of the driving hydraulic cylinder, and the upper ball valve of the emergency release device can be reliably kept in an original working state. When the three-position four-way electric proportional reversing valve 23 is in the working position, the two-way balance valve 24 can automatically adjust the opening of the valve core, so that the motion process of the driving oil cylinder 11 is stable and impact-free, and the damage to structural components caused by liquid impact when the ball valve is suddenly closed or opened when the loading and unloading arm pipeline is used for conveying liquid is effectively relieved.
Driving cylinder 11: the driving oil cylinder 11 is a hydraulic power executing mechanism, and when a hydraulic control system sends out a control signal, the opening or closing of the ball valve on the emergency release device is realized through the telescopic movement of the cylinder rod of the driving oil cylinder 11.
Disengaging cylinder 10: the disengaging cylinder 10 is a hydraulic power actuator which mainly realizes the closing of the ball valve of the emergency disengaging device and the disengagement of the upper ball valve and the lower ball valve. When the loading and unloading arm works normally, as shown in the state of fig. 1, the small cavity of the disengaging oil cylinder 10 is communicated with the hydraulic oil source P, the large cavity is communicated with the oil return T, and the cylinder rod of the disengaging oil cylinder 10 is in a retracted state. The emergency release device will initiate the release action only when there is hydraulic pressure oil in the large chamber of the release cylinder 10.
Reversing valve 27: preferably, the reversing valve 27 adopts a manual reversing valve, so that the false alarm rate can be reduced, the safety and reliability are further improved, and the disengagement operation of the emergency disengagement device needs to be manually started after manual confirmation, so that unnecessary loss caused by the fact that a full-automatic system automatically triggers the disengagement operation of the emergency disengagement device when false alarm occurs can be avoided; and can avoid the accident of detachment caused by misoperation. The reversing valve 27 may also be an electromagnetic reversing valve, but the false alarm rate thereof may be relatively high.
The manual reversing valve 27 is a two-position two-way manual reversing valve with friction positioning, and in the position shown in fig. 1, the valve core of the manual reversing valve 27 is at the left position, and because the valve core at the left position has a one-way conduction function, hydraulic pressure oil can only flow from an A' port to an A port through the manual reversing valve 27, and is blocked in the reverse direction. This ensures that the emergency release device should not malfunction and take place the disconnection accident when the loading arm is in normal operation. When the ship loading and unloading arm is in butt joint with the ship, the handle of the manual reversing valve 27 is pushed, the valve core of the manual reversing valve 27 is switched to the right position to work, at the moment, the port A' of the manual reversing valve 27 is freely communicated with the port A, the function of the disengaging oil cylinder 10 in the emergency disengaging device is started, and the disengaging operation of the emergency disengaging device can be realized.
Hydraulic control reversing valve 28: the hydraulic control reversing valve 28 is arranged between the large cavity of the driving oil cylinder 11 and the system oil return T, and the control oil port K of the hydraulic control reversing valve is connected with the large cavity loop of the disengaging oil cylinder 10. In the state shown in fig. 1, the valve core of the pilot operated directional valve 28 is in a left position state, the oil ports 1 and2 are cut off, the large-cavity oil path of the driving oil cylinder 11 is in a cut-off state, and at the moment, the working position of the driving oil cylinder 11 can be kept unchanged. When the emergency release action is required to be realized, the pressure oil acts on the large cavity of the oil cylinder 10, and simultaneously acts on the hydraulic control port K of the hydraulic control reversing valve 8 to push the valve core of the hydraulic control reversing valve 28 to reverse to the right, and at the moment, the large cavity oil way of the driving oil cylinder 11 is communicated with the oil return circuit T through the ports 1 and2 of the hydraulic control reversing valve. The cylinder rod of the disengaging oil cylinder 10 stretches out, the cylinder rod of the driving oil cylinder 11 retracts, and the upper ball valve and the lower ball valve are closed. The upper ball valve and the lower ball valve are driven to be closed, the hoops of the upper ball valve and the lower ball valve are opened, and the upper ball valve and the lower ball valve in the emergency disengaging device are disengaged, so that the separation of the loading arm and the ship is realized.
Two-position four-way electromagnetic directional valve 29: the two-position four-way electromagnetic directional valve 29 mainly controls the movement of the disengaging cylinder 10 in the hydraulic control system. When the loading arm works normally, the two-position four-way electromagnetic directional valve 29 is powered off, and when the loading arm is in the working state (right position of the valve core) shown in fig. 1, the pressure oil source P acts on the small cavity of the disengaging oil cylinder 10 through the two-position four-way electromagnetic directional valve 29, and the cylinder rod of the disengaging oil cylinder 10 is in a retraction state. When the loading and unloading arm needs to be separated in an emergency, the two-position four-way electromagnetic directional valve 29 is powered on, the valve core is positioned at the left position, at the moment, the pressure oil source P acts on the large cavity of the separation oil cylinder 10 through the two-position four-way electromagnetic directional valve 29, the cylinder rod of the separation oil cylinder 10 stretches out, and the ball valve closing and separating actions of the emergency separation device are realized.
The working principle of this example is as follows:
The hydraulic oil source P provides a hydraulic power source for the hydraulic control system of the emergency release device through the check valve 21. After passing through the one-way valve 21, the pressure oil source P acts on the P ports of the accumulator 22, the three-position four-way electric proportional reversing valve 23 and the two-position four-way electromagnetic reversing valve 29 respectively, and because of the one-way stop function of the one-way valve 21, the accumulator 2 is always filled with the pressure oil, so that an emergency power source can be provided for the emergency disengaging device, and under the emergency disengaging condition, a hydraulic actuating mechanism in the emergency disengaging device is rapidly driven to move. When the loading and unloading arm for the ship normally works, the valve core of the three-position four-way electric proportional reversing valve 23 is in the middle position, the driving oil cylinder 11 does not act, and the original working state is maintained. The hydraulic pressure oil source acts on the small cavity of the disengaging oil cylinder 10 through the right position of the two-position four-way electromagnetic reversing valve 29, so that the cylinder rod of the disengaging oil cylinder 10 is kept in a retracted state. When the loading and unloading arm for the ship is in a primary alarm state, the electromagnet on the right side of the three-position four-way electric proportional reversing valve 23 is powered, the valve core works in the right position, pressure oil enters the small cavity of the driving oil cylinder 11 through the P-A of the three-position four-way electric proportional reversing valve 23 and the left side channel of the two-way balance valve 24, and under the action of the hydraulic pressure oil, the cylinder rod of the driving oil cylinder 11 is retracted, and the upper ball valve of the emergency disengaging device is driven to be closed. If the primary alarm state of the marine loading and unloading arm is released, the left electromagnet of the three-position four-way electric proportional reversing valve 23 is powered on, the valve core works in the left position, hydraulic pressure oil enters the large cavity of the driving oil cylinder 11 through the P-B of the three-position four-way electric proportional reversing valve 23 and the right channel of the two-way balance valve 24, the cylinder rod of the driving oil cylinder 11 stretches out under the action of hydraulic oil, the upper ball valve of the emergency release device is driven to be opened, and the marine loading and unloading arm is restored to the normal working state. If the alarm state of the marine loading and unloading arm is not released, the marine loading and unloading arm enters a secondary alarm state, and when the marine loading and unloading arm needs to enter an emergency release state, the electromagnet of the two-position four-way electromagnetic reversing valve 29 is powered on, the valve core is in left-position work, after hydraulic pressure oil passes through P-B of the two-position four-way electromagnetic reversing valve 29, part of hydraulic pressure oil acts on a control port K of the hydraulic control reversing valve 28, so that the valve core of the hydraulic control reversing valve 28 is reversed to right-position work, and a large cavity of the driving oil cylinder 11 is communicated with system oil return T; part of the hydraulic oil passes through A-A' of the manual reversing valve 27 (at this time, the manual reversing valve 27 is in the right working condition of fig. 1) and acts on the large cavity of the disengaging cylinder 10, the cylinder rod of the disengaging cylinder 10 stretches out under the action of the hydraulic oil to drive the upper ball valve and the lower ball valve of the emergency disengaging device to be closed, and the valve hoop 5 between the upper ball valve and the lower ball valve is opened to separate the upper ball valve and the lower ball valve of the emergency disengaging device (the upper ball valve part is left on the loading arm and the lower ball valve part is left on the ship). After the emergency release is completed, the electromagnet of the two-position four-way electromagnetic reversing valve 29 is powered off, and the cylinder rod of the release cylinder 10 automatically retracts under the action of pressure oil, so that interference during release is avoided. Thereby realizing the emergency separation of the ship loading arm and the ship and avoiding the dangerous situations such as the damage of the loading arm.
In conclusion, the hydraulic control system for the emergency release device can realize safe and reliable operation of the emergency release device according to different working condition requirements, and ensure the safety of the operation process of the loading arm for loading the ship.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. A hydraulic control system for an emergency release device, the emergency release device comprising a first part and a second part movably connected; the system comprises: a one-way valve (21), a first reversing valve (23), a two-way balance valve (24), a driving oil cylinder (11), a disengaging oil cylinder (10), a second reversing valve (27), a third reversing valve (28) and a fourth reversing valve (29);
The driving oil cylinder (11) and the disengaging oil cylinder (10) are hydraulic power actuating mechanisms, wherein the telescopic movement of a cylinder rod in the driving oil cylinder (11) realizes the opening or closing of the first component so as to open or close an external channel of the first component; the first component and the second component are closed and separated by the telescopic movement of a cylinder rod in the disengaging oil cylinder (10);
The one-way valve (21) is arranged at the inlet of the pressure oil source P and has a one-way stop function, and the pressure oil source P supplies oil to the hydraulic control system through the one-way valve (21) and is blocked in the reverse direction;
The first reversing valve (23) is used for ensuring that the driving oil cylinder (11) keeps in-situ and does not act when the device attached by the emergency release device is in normal operation; when the device attached by the emergency release device is in an alarm state or the alarm state is released, the cylinder rod of the driving oil cylinder (11) is controlled to perform telescopic movement, and the first component is driven to be closed or opened;
The bidirectional balance valve (24) is arranged between the first reversing valve (23) and the large and small cavity hydraulic circuits of the driving oil cylinder (11) and is used for realizing locking or opening of the large and small cavity hydraulic circuits of the driving oil cylinder (11);
the second reversing valve (27) is arranged between the fourth reversing valve (29) and the large-cavity hydraulic circuit of the disengaging oil cylinder (10) and is used for opening or closing disengaging operation of the emergency disengaging device;
The third reversing valve (28) is used for controlling a cylinder rod of the driving oil cylinder (11) to perform telescopic movement to drive the first component to be closed when the emergency disengaging device is disengaged and opened; when the emergency disengaging device is closed during disengaging operation, the driving oil cylinder (11) is not operated, so that the driving oil cylinder (11) is ensured to keep the working position unchanged;
The fourth reversing valve (29) is used for controlling a cylinder rod of the disengaging oil cylinder (10) to perform telescopic movement when the disengaging operation of the emergency disengaging device is started, and driving the first component and the second component to be closed and separating the two components; when the emergency release device is released or closed, the cylinder rod for controlling the release cylinder (10) is restored to the original state;
when the marine loading and unloading arm is in a primary alarm state, the right electromagnet of the first reversing valve (23) is electrified, the valve core is in a right position to work, pressure oil enters a small cavity of the driving oil cylinder (11) through P-A of the first reversing valve (23) and a left channel of the bidirectional balance valve (24), and under the action of the hydraulic pressure oil, a cylinder rod of the driving oil cylinder (11) is retracted to drive a first component of the emergency disengaging device to be closed;
If the alarming state of the marine loading and unloading arm is not relieved, the marine loading and unloading arm enters a secondary alarming state, when the marine loading and unloading arm needs to enter an emergency disengaging state, an electromagnet of a fourth reversing valve (29) is powered on, a valve core works in a left position, after hydraulic pressure oil passes through P-B of the fourth reversing valve (29), a part of hydraulic pressure oil acts on a control port K of a third reversing valve (28), so that the valve core of the third reversing valve (28) is reversed to a right position to work, and a large cavity of a driving oil cylinder (11) is communicated with a system oil return T; part of the hydraulic oil acts on a large cavity of the disengaging oil cylinder (10) through a second reversing valve (27), and under the action of the hydraulic oil, a cylinder rod of the disengaging oil cylinder (10) stretches out to drive a first part and a second part of the emergency disengaging device to be closed and separate.
2. The hydraulic control system for an emergency release device according to claim 1, characterized in that the system further comprises an accumulator (22) as an emergency power source for supplying oil to the hydraulic control system in the absence of the pressurized oil source P; the oil in the accumulator (22) is provided by a source of pressurized oil P, and the accumulator (22) is not leaky under the action of the one-way valve (21).
3. The hydraulic control system for emergency release devices according to claim 1 or 2, characterized in that the first reversing valve (23) is configured to ensure that the driving cylinder (11) remains in place and is configured to control the telescopic movement of the cylinder rod of the driving cylinder (11), driving the first component to be closed or opened, in particular by: when the device attached by the emergency release device is in normal operation, the first reversing valve (23) enables the large cavity and the small cavity of the driving oil cylinder (11) to be communicated, and the driving oil cylinder (11) does not act; when the device attached by the emergency release device is in an alarm state, a large cavity of the driving oil cylinder (11) is connected with a system oil return T, a hydraulic oil source P acts on a small cavity of the driving oil cylinder (11) through a first reversing valve (23), a cylinder rod of the driving oil cylinder (11) performs retraction movement, and a first component is driven to be closed; when the alarm state of the device attached to the emergency release device is released, the small cavity of the driving oil cylinder (11) is connected with the system oil return T, the hydraulic oil source P acts on the large cavity of the driving oil cylinder (11) through the first reversing valve (23), and the cylinder rod of the driving oil cylinder (11) stretches out to drive the first component to be opened.
4. A hydraulic control system for an emergency release device according to claim 3, characterized in that the first reversing valve (23) is in particular a three-position four-way electric proportional reversing valve, and in that the position is Y-shaped.
5. The hydraulic control system for an emergency release device according to claim 4, characterized in that the second reversing valve (27) is a manual reversing valve.
6. The hydraulic control system for the emergency release device according to claim 5, wherein the second reversing valve (27) is a two-position two-way manual reversing valve, and when the release operation of the emergency release device is closed, the two-position two-way manual reversing valve is in one-way conduction, and hydraulic pressure oil can only flow out from the large cavity of the release oil cylinder (10) and is blocked in the reverse direction.
7. The hydraulic control system for emergency release devices according to claim 6, characterized in that the third reversing valve (28) is configured to control the telescopic movement of the cylinder rod of the driving cylinder (11), to drive the first component closed, and to ensure that the driving cylinder (11) remains in the working position, in particular by: the third reversing valve (28) is arranged between the large cavity of the driving oil cylinder (11) and the system oil return T, when the emergency disengaging device is disengaged and the operation is started, the system oil return T is communicated with the large cavity of the driving oil cylinder (11) through the third reversing valve (28), the cylinder rod of the driving oil cylinder (11) performs retraction movement, and the first component is driven to be closed; when the emergency disengaging device is closed during disengaging operation, the system oil return T is isolated from the large cavity of the driving oil cylinder (11) through a third reversing valve (28).
8. The hydraulic control system for an emergency release device according to claim 7, characterized in that the third reversing valve (28) is in particular a pilot operated reversing valve, the control port K of which communicates with the large-chamber hydraulic circuit of the release cylinder (10).
9. The hydraulic control system for emergency release devices according to claim 8, characterized in that the fourth reversing valve (29) is configured to control the telescopic movement of the cylinder rod of the release cylinder (10), drive the first and second parts to close and release the two parts from each other, and control the cylinder rod of the release cylinder (10) to return to an initial state, specifically comprising: when the emergency disengaging device is opened in disengaging operation, the pressure oil source P acts on a large cavity of the disengaging oil cylinder (10) through a fourth reversing valve (29) and a second reversing valve (27), and the cylinder rod of the disengaging oil cylinder (10) stretches out to drive the first part and the second part to be closed and the two parts to be separated; when the emergency release device is released or closed, the pressure oil source P acts on the small cavity of the release oil cylinder (10) through the fourth reversing valve (29), and the cylinder rod of the release oil cylinder (10) performs retraction movement.
10. The hydraulic control system for an emergency release device according to claim 9, characterized in that the fourth reversing valve (29) is a two-position four-way solenoid reversing valve.
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Application publication date: 20200818 Assignee: JARI AUTOMATION Co.,Ltd. CHINA Assignor: 716TH RESEARCH INSTITUTE OF CHINA SHIPBUILDING INDUSTRY Corp. Contract record no.: X2020980007928 Denomination of invention: Hydraulic control system for emergency release device License type: Exclusive License Record date: 20201116 |
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Address after: 222001 No.18 Shenghu Road, Lianyungang City, Jiangsu Province Applicant after: The 716th Research Institute of China Shipbuilding Corp. Address before: 222001 No.18 Shenghu Road, Lianyungang City, Jiangsu Province Applicant before: 716TH RESEARCH INSTITUTE OF CHINA SHIPBUILDING INDUSTRY Corp. |
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