CN210985640U - Overvoltage protection system of stretch-draw machine - Google Patents
Overvoltage protection system of stretch-draw machine Download PDFInfo
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- CN210985640U CN210985640U CN201922327312.4U CN201922327312U CN210985640U CN 210985640 U CN210985640 U CN 210985640U CN 201922327312 U CN201922327312 U CN 201922327312U CN 210985640 U CN210985640 U CN 210985640U
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Abstract
The utility model provides a stretch-draw machine overvoltage protection system, stretch-draw machine include oil tank, prestressing force stretch-draw jack, high pressure fuel pipe and oil pump, and overvoltage protection system includes: the pressure detection module is used for detecting the oil pressure in the high-pressure oil pipe and outputting a pressure detection signal; the pressure comparison module outputs an overpressure detection signal when the pressure detection signal is greater than a pressure preset value; and the turn-off module is used for turning off power supply of the oil pump when receiving the overvoltage detection signal. Through adopting above-mentioned technical scheme, in the tensioning machine use, realize the real-time supervision to the oil pressure in the high pressure fuel pipe through pressure measurement module, when the oil pressure is greater than the pressure default in the high pressure fuel pipe, then turn off the power supply of oil pump for the oil pump stop work, the oil pressure in high pressure fuel pipe and the prestressing force tensioning jack stops to rise, thereby avoids high pressure fuel pipe or prestressing force tensioning jack to lead to bursting or the jar explosion because the oil pressure is too high.
Description
Technical Field
The utility model belongs to the technical field of the stretch-draw machine technique and specifically relates to a stretch-draw machine overvoltage protection system is related to.
Background
The prestressed anchorage (anchor cable) is a tension structure which is formed by changing a steel strand into a high-stress state for a long time through a special process, so that the strength of a rock body reinforced by the steel strand is enhanced, the stress state of the rock body is improved, and the stability of the rock body is improved. The anchor cable tensioning machine is a common tool for adjusting the stress of the anchor rod in the current anchor cable construction process.
The existing anchor cable tensioning machine consists of an oil tank, a prestress tensioning jack, a high-pressure oil pipe, an oil pump and the like. In the use process, a boost switch is started by a worker, oil in an oil tank is continuously injected into the tensioning jack by an oil pump, so that the oil pressure in the high-pressure oil pipe and the tensioning jack is continuously increased, the piston of the tensioning jack is pushed to move, and the tensioning of the anchor cable is realized.
In order to prevent the tensioning jack from working under an excessively high pressure, in the use process of the conventional anchor cable tensioning machine, a worker needs to constantly pay attention to oil pressure of an oil pipe, and when the oil pressure of the oil pipe rises to a preset value, the operation of an oil pump needs to be stopped so as to prevent the oil pressure in the oil pipe and the tensioning jack from continuing to rise. However, once the field worker fails to stop the oil pump in time, the oil pump continues to work, and the oil pressure in the oil pipe and the tensioning jack may continue to rise after reaching a predetermined pressure, thereby forming a potential safety hazard, such as an oil pipe burst or a tensioning jack cylinder burst.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a not enough to prior art exists, the utility model aims at providing a stretch-draw machine overvoltage protection system, this overvoltage protection system can avoid because the oil pressure in oil pipe and the jack-draw is too high and the potential safety hazard that leads to.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
the utility model provides a stretch-draw machine overvoltage protection system, stretch-draw machine includes oil tank, prestressing force stretch-draw jack, high-pressure fuel pipe and oil pump, and overvoltage protection system includes:
the pressure detection module is connected with the high-pressure oil pipe and used for detecting the oil pressure in the high-pressure oil pipe and outputting a pressure detection signal in real time;
the pressure comparison module is coupled with the pressure detection module and used for receiving the pressure detection signal and outputting an overpressure detection signal when the pressure detection signal is greater than a pressure preset value;
and the shutoff module is coupled with the pressure comparison module and used for receiving the overvoltage detection signal and shutting off the power supply of the oil pump when receiving the overvoltage detection signal.
Through adopting above-mentioned technical scheme, in the tensioning machine use, realize the real-time supervision to the oil pressure in the high pressure fuel pipe through pressure measurement module, when the oil pressure is greater than the pressure default in the high pressure fuel pipe, then turn off the power supply of oil pump for the oil pump stop work, the oil pressure in high pressure fuel pipe and the prestressing force tensioning jack stops to rise, thereby avoids high pressure fuel pipe or prestressing force tensioning jack to lead to bursting or the jar explosion because the oil pressure is too high.
As an improvement of the present invention, the pressure detection module comprises a high-pressure measuring oil pipe and a hydraulic sensor for measuring the oil pressure in the high-pressure measuring oil pipe, and two ends of the high-pressure measuring oil pipe are connected to the high-pressure oil pipe through high-pressure oil pipe joints; the pressure comparison module and the turn-off module are arranged on a control board, and the control board is fixedly connected with the tensioning machine through a fixed shell.
Through adopting above-mentioned technical scheme, because the setting of high pressure measurement oil pipe and control panel for stretch-draw machine overvoltage protection system can improve based on current stretch-draw machine, has also reduced the popularization degree of difficulty of stretch-draw machine overvoltage protection system on the basis of having improved this stretch-draw machine overvoltage protection system's practicality.
As an improvement of the utility model, fixed shell is provided with and is used for showing the display screen of oil pressure in the high-pressure oil pipe.
Through adopting above-mentioned technical scheme, the setting of looking down the screen has realized the demonstration to oil pressure in the high pressure fuel pipe.
As the utility model discloses an improvement, the pressure comparison module includes the comparator and the reference cell of being connected with the comparator, the normal phase input of comparator is connected the pressure detection module for accept the pressure detection signal, the reference cell is including concatenating in the fixed resistance and the potentiometre of power, the node that fixed resistance and potentiometre are coupled is used for exporting the inverting input of pressure default and connection comparator, when the pressure detection signal is greater than the pressure default, the output of comparator exports the excessive pressure detection signal.
Through adopting above-mentioned technical scheme, in the tensioning machine use, staff's accessible adjusts the pressure default value through adjusting the potentiometre, when pressure detection signal is greater than the pressure default value, through the excessive pressure detection signal of comparator output.
As the utility model discloses an improvement, turn-off the module including turn-off the triode and turn-off the relay, the projecting pole that turns-off the triode passes through turn-off the coil ground of relay, the collecting electrode connection power positive pole that turns-off the triode, the basic level that turns-off the triode is connected pressure comparison module, when turning-off the triode and receiving excessive pressure detection signal, turn-off the triode and switch on, turn-off the normally closed contact of relay with the starting switch series connection of oil pump.
By adopting the technical scheme, because the normally closed contact of the turn-off relay is connected with the starting switch of the oil pump in series, when the turn-off triode receives an overvoltage detection signal, the turn-off triode switches on the coil of the turn-off relay to be electrified, and the normally closed contact of the turn-off relay is disconnected, so that the connection between the oil pump and the power supply is disconnected.
As an improvement of the utility model, the device further comprises a manual switch, the manual switch is connected in parallel with the branch formed by the normally closed contact of the turn-off relay and the starting switch in series.
By adopting the technical scheme, when the normally closed contact of the turn-off relay is disconnected, the connection between the oil pump and the power supply is disconnected, the oil pressure in the prestress tensioning jack is continuously adjusted if needed, and the oil pressure in the prestress tensioning jack can be manually adjusted through the manual switch.
As an improvement of the utility model, the alarm device further comprises an alarm module, the alarm module with the first normally open contact of turn-off relay is connected in series in the power.
By adopting the technical scheme, because the alarm module is connected with the first normally open contact in series, when the first normally open contact is closed, the alarm module is electrified to give an alarm, thereby playing a role in warning.
As the utility model discloses an improve, still including ending the crying button, end the crying button and end the coil of crying relay and turn-off the second normally open contact of relay and concatenate in the power, end the normally closed contact of crying relay and concatenate between alarm module and first normally open contact, end the crying button and be self-locking button.
By adopting the technical scheme, when the alarm module gives an alarm, the sound stopping button can be used for connecting the sound stopping relay with the power supply, so that the connection between the alarm module and the power supply is disconnected, and the alarm module stops giving an alarm.
To sum up, the utility model discloses a following at least one useful technological effect:
1. the arrangement of the pressure detection module, the pressure comparison module and the turn-off module realizes the overpressure turn-off of the oil pressure in the high-pressure oil pipe and the prestress tensioning jack, so that the oil pipe burst or the cylinder burst of the prestress tensioning jack caused by overhigh oil pressure is prevented, and the safety of the tensioning machine is improved;
2. the setting of manual switch makes the staff can reach the manual regulation oil pressure after the certain degree at the oil pressure, has improved the maneuverability of stretch-draw machine.
Drawings
Fig. 1 is a schematic view of the overall structure of the stretching machine.
Fig. 2 is a working principle diagram of the stretching machine.
Fig. 3 is a system diagram of an overvoltage protection system of a tensioning machine.
In the figure, 1, a chassis; 2. a prestressed tensioning jack; 3. an oil pump; 41. a pressure detection module; 411. a hydraulic pressure sensor; 412. a high pressure measurement oil pipe; 42. a pressure comparison module; 43. a shutdown module; 5. a high pressure oil pipe; 6. the housing is fixed.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, for the utility model discloses a stretch-draw machine overvoltage protection system, wherein, stretch-draw machine includes quick-witted case 1, oil tank, prestressing force stretch-draw jack 2 and oil pump 3. The oil tank is arranged in the case 1, the oil pump 3 is fixedly arranged on the outer side of the case 1 and fixedly connected with the case 1, the high-pressure oil pipe 5 is connected between the oil pump 3 and the prestress tensioning jack 2, the oil return pipe is connected between the oil tank and the prestress tensioning jack 2, and the mailbox is communicated with the oil pump 3 through the oil suction pipe. In the use process of the tensioning machine, the anchor cable is fixedly connected with a piston rod of the prestress tensioning jack 2, when the oil pump 3 works, oil in an oil tank is conveyed into the prestress tensioning jack 2 through the high-pressure oil pipe 5, and therefore the anchor cable is pulled through the prestress tensioning jack 2, and the prestress of the anchor cable is adjusted. Meanwhile, the oil return pipe and the high-pressure oil pipe 5 are provided with pressure release valves for reducing the oil pressure in the prestress tensioning jack 2.
Referring to fig. 3, the overpressure protection system includes a pressure detection module 41, a pressure comparison module 42, and a shut-off module 43. The pressure detection module 41 is connected with the high-pressure oil pipe 5, the pressure detection module 41 detects the oil pressure in the high-pressure oil pipe 5 and outputs a pressure detection signal to the pressure comparison module 42 in real time, when the pressure detection signal is larger than a pressure preset value, the pressure comparison module 42 outputs an overpressure detection signal to the turn-off module 43, and the turn-off module 43 turns off the power supply of the oil pump 3 after receiving the overpressure detection signal, so that the oil pressure in the high-pressure oil pipe 5 and the prestress tensioning jack 2 is prevented from being too high.
Referring to fig. 1 and 3, the pressure detection module 41 includes a high-pressure measurement oil pipe 412 and a hydraulic pressure sensor 411 for measuring an oil pressure in the high-pressure measurement oil pipe 412. Both ends of the high-pressure measuring oil pipe 412 are provided with high-pressure oil pipe 5 joints, and when the oil pressure in the high-pressure oil pipe 5 needs to be detected, the high-pressure measuring oil pipe 412 is connected into the high-pressure oil pipe 5 through the high-pressure oil pipe 5 joints at both ends. Among them, the hydraulic pressure sensor 411 is preferably a direct lead type hydraulic pressure sensor 411.
The turn-off module 43 comprises a turn-off triode Q2 and a turn-off relay, an emitter of the turn-off triode Q2 is grounded through a coil KA of the turn-off relay, a collector of the turn-off triode Q2 is connected with a positive electrode of a power supply, a base of the turn-off triode Q2 is connected with a comparator OA1, and a normally closed contact KA-1 of the turn-off relay, a starting switch SB of the oil pump 3 and a fixed resistor R3 are connected in series with the power supply. The starting switch SB is a self-locking switch, when the starting switch SB is pressed, the oil pump 3 is electrified to work, the oil pressure in the prestress tensioning jack 2 rises, when the cut-off triode Q2 receives an overvoltage detection signal output by the comparator OA1, the oil pressure in the high-pressure oil pipe 5 reaches a pressure preset value, the cut-off triode Q2 is conducted at the moment, the normally closed contact KA-1 of the cut-off relay is disconnected, the oil pump 3 is powered off, and the oil pressure in the high-pressure oil pipe 5 and the prestress tensioning jack 2 is prevented from continuing to rise.
Further, a branch formed by connecting the normally closed contact KA-1 of the turn-off relay and the starting switch SB in series is connected with a manual switch K1 in parallel. When the normally closed contact KA-1 of the turn-off relay is disconnected due to the fact that the oil pressure in the high-pressure oil pipe 5 is larger than the preset pressure value, the oil pump 3 is powered off, and if the prestress of the anchor cable still does not meet the requirement and the oil pressure in the prestress tensioning jack 2 needs to be increased continuously at the moment, the oil pump 3 can continue to work by pressing the manual switch K1. The manual switch K1 is a self-reset switch, and the arrangement of the manual switch K1 realizes the fine adjustment of the oil pressure in the prestress tensioning jack 2, so that the operability of the tensioning machine is improved.
The overvoltage protection system further comprises an alarm module, preferably a buzzer, and a sound-stopping button K2. The alarm module and a first normally open contact KA-2 of the turn-off relay are connected in series with a power supply, the ringing stopping button K2 and a coil KM1 of the ringing stopping relay are connected in series with the power supply, a normally closed contact KM1-1 of the ringing stopping relay is connected in series between the alarm module and the first normally open contact KA-2, and the ringing stopping button K2 is a self-locking button. When the coil KA of the turn-off relay is electrified, the first normally open contact KA-2 is closed, the buzzer is electrified to give an alarm, if the buzzer needs to be stopped sounding, the sound stopping button K2 is triggered, the coil KM1 of the sound stopping relay is electrified, the normally closed contact KM1-1 is disconnected, and the buzzer is powered off.
Further, the pressure comparing module 42, the shutdown module 43 and the alarm module are all disposed on a control board, the control board is fixedly connected to the upper surface of the chassis 1 through a fixing housing 6, a display screen connected to the pressure detecting module 41 is disposed on the upper surface of the fixing housing 6, and the display screen is preferably a liquid crystal display.
According to the above, in the use process of the stretching machine, the oil pump 3 is started through the starting switch SB, the oil pressure in the prestress stretching jack 2 is further continuously improved, when the oil pressure in the high-pressure oil pipe 5 reaches a preset pressure value, the relay coil KA is turned off to be electrified, the oil pump 3 stops working, the buzzer gives out a sound prompt, and a field worker can turn off the buzzer to sound through the sound stopping button K2. If the site worker detects that the prestress of the anchor cable does not meet the requirement, the oil pump 3 can be continuously and manually started through the manual switch K1, so that the fine adjustment of the prestress of the anchor cable is realized.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a stretch-draw machine overvoltage protection system, stretch-draw machine includes oil tank, prestressing force stretch-draw jack (2), high pressure fuel pipe (5) and oil pump (3), its characterized in that, overvoltage protection system includes:
the pressure detection module (41) is connected with the high-pressure oil pipe (5) and is used for detecting the oil pressure in the high-pressure oil pipe (5) and outputting a pressure detection signal in real time;
the pressure comparison module (42) is coupled with the pressure detection module (41) and used for receiving the pressure detection signal and outputting an overpressure detection signal when the pressure detection signal is greater than a pressure preset value;
and the turn-off module (43) is coupled with the pressure comparison module (42) and used for receiving the overpressure detection signal and turning off the power supply of the oil pump (3) when receiving the overpressure detection signal.
2. A stretcher overvoltage protection system according to claim 1, characterized in that: the pressure detection module (41) comprises a high-pressure measuring oil pipe (412) and a hydraulic sensor (411) for measuring oil pressure in the high-pressure measuring oil pipe (412), and two ends of the high-pressure measuring oil pipe (412) are connected in the high-pressure oil pipe (5) through a high-pressure oil pipe (5) joint; the pressure comparison module (42) and the turn-off module (43) are arranged on a control board, and the control board is fixedly connected with the tensioning machine through a fixed shell (6).
3. A stretcher overvoltage protection system according to claim 2, characterized in that: and the fixed shell (6) is provided with a display screen for displaying the oil pressure in the high-pressure oil pipe (5).
4. A stretcher overvoltage protection system according to claim 3, characterized in that: the pressure comparison module (42) comprises a comparator and a reference unit connected with the comparator, wherein the normal phase input end of the comparator is connected with the pressure detection module (41) and is used for receiving a pressure detection signal, the reference unit comprises a fixed resistor and a potentiometer which are connected in series with a power supply, a node where the fixed resistor and the potentiometer are coupled is used for outputting the pressure preset value and is connected with the reverse phase input end of the comparator, and when the pressure detection signal is larger than the pressure preset value, the output end of the comparator outputs the overvoltage detection signal.
5. A stretcher overvoltage protection system according to claim 1, characterized in that: the turn-off module (43) comprises a turn-off triode and a turn-off relay, an emitting electrode of the turn-off triode is grounded through a coil of the turn-off relay, a collector electrode of the turn-off triode is connected with a positive electrode of a power supply, a base level of the turn-off triode is connected with the pressure comparison module (42), the turn-off triode is conducted when the turn-off triode receives an overvoltage detection signal, and a normally closed contact of the turn-off relay is connected with a starting switch of the oil pump (3) in series.
6. A stretcher overvoltage protection system according to claim 5, characterized in that: the manual switch is connected in parallel with a branch formed by connecting the normally closed contact of the turn-off relay and the starting switch in series.
7. A stretcher overvoltage protection system according to claim 5, characterized in that: the alarm module is connected with the first normally open contact of the turn-off relay in series to a power supply.
8. A stretcher overvoltage protection system according to claim 7, characterized in that: the alarm device is characterized by further comprising a ringing stopping button, the ringing stopping button is connected with a coil of a ringing stopping relay and a second normally open contact of a turn-off relay in series to a power supply, the normally closed contact of the ringing stopping relay is connected between the alarm module and the first normally open contact in series, and the ringing stopping button is a self-locking button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922327312.4U CN210985640U (en) | 2019-12-21 | 2019-12-21 | Overvoltage protection system of stretch-draw machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922327312.4U CN210985640U (en) | 2019-12-21 | 2019-12-21 | Overvoltage protection system of stretch-draw machine |
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| CN210985640U true CN210985640U (en) | 2020-07-10 |
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| CN201922327312.4U Active CN210985640U (en) | 2019-12-21 | 2019-12-21 | Overvoltage protection system of stretch-draw machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115575025A (en) * | 2022-12-07 | 2023-01-06 | 中感(安徽)矿山技术有限公司 | Main control pretightning force anchor rod, cable pressure sensor |
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2019
- 2019-12-21 CN CN201922327312.4U patent/CN210985640U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115575025A (en) * | 2022-12-07 | 2023-01-06 | 中感(安徽)矿山技术有限公司 | Main control pretightning force anchor rod, cable pressure sensor |
| CN115575025B (en) * | 2022-12-07 | 2023-02-17 | 中感(安徽)矿山技术有限公司 | Main control pretightning force anchor rod, cable pressure sensor |
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