CN109958802B - Low-pressure fine-tuning built-in dead weight type safety valve - Google Patents
Low-pressure fine-tuning built-in dead weight type safety valve Download PDFInfo
- Publication number
- CN109958802B CN109958802B CN201910344872.2A CN201910344872A CN109958802B CN 109958802 B CN109958802 B CN 109958802B CN 201910344872 A CN201910344872 A CN 201910344872A CN 109958802 B CN109958802 B CN 109958802B
- Authority
- CN
- China
- Prior art keywords
- valve
- connecting cylinder
- seat
- valve body
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 33
- 238000009434 installation Methods 0.000 claims description 17
- 238000005192 partition Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 239000000428 dust Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/12—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side weight-loaded
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Details Of Valves (AREA)
Abstract
The utility model provides a built-in dead weight formula relief valve of low pressure fine setting, including the valve body, the weight, the disk seat, the valve gap, weight slidable mounting is in the valve gap, upper portion in the valve body is stretched into to the weight lower part, pass through the guiding hole from top to bottom has been seted up in the weight, install elastic centering fine setting mechanism in the guiding hole, weight bottom fixedly connected with outer connecting cylinder, coaxial fixed mounting has an inner connecting cylinder in the outer connecting cylinder, the inside fixed baffle that is provided with of inner connecting cylinder, the coaxial fixedly connected with recoil dish of outer connecting cylinder lower extreme, the integrative retaining ring that is provided with of recoil dish bottom outer circumference, the level is provided with the valve clack with disk seat sealing fit in the retaining ring. The valve has high sealing performance, high stability of lifting guide and verticality of the valve clack, high valve sensitivity due to self-weight of the heavy hammer matched with the elastic force adjustment of the spring, and good opening, lifting and seat returning action performance and action stability. Is suitable for equipment and pipelines of E-stage steam, air boilers and similar mediums with low pressure and working temperature less than or equal to 200 ℃.
Description
Technical Field
The invention belongs to the technical field of valves, and particularly relates to a low-pressure fine-tuning built-in dead weight type safety valve.
Background
The low-pressure fine-tuning built-in dead weight type safety valve is an overpressure protection valve used on a thermodynamic system as a steam boiler, a pressure steam container and a pipeline. The low-pressure full-open type safety valve used on thermodynamic systems, steam boilers, pressure steam containers and pipelines in the past has a simple structure, the valve clack is a plane sealing surface, the outside of the heavy hammer is not provided with a protection device, and the normal operation of the valve is easily affected if external environment shakes or dust exists; the action performance of the valve is unstable and cannot meet the standard requirement; the pressure is not easy to adjust when deviation occurs, the sealing is easy to leak, and the user reflects larger opinion.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a low-pressure fine-tuning built-in dead weight type safety valve which is good in sealing performance, strong in stability and long in service life.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a built-in dead weight formula relief valve of low pressure fine setting, including valve body and weight, the valve body right side and bottom all are provided with the installation interface, the lower part is provided with the disk seat in the valve body, the valve body top is through tang structure cooperation centering and through the fixed valve gap that is provided with of installation bolt, weight sliding guide installs in the valve gap, weight lower part stretches into the internal upper portion of valve body, pass through the guiding hole from top to bottom has been seted up in the weight, the central line of guiding hole coincides with the central line of disk seat, install elastic centering fine setting mechanism in the guiding hole, weight bottom fixedly connected with and the guiding hole just with the outer connecting cylinder of internal diameter, coaxial fixed mounting has an inner connecting cylinder in the outer connecting cylinder, the inside fixedly provided with baffle of inner connecting cylinder, elastic centering fine setting mechanism's upper end and lower extreme respectively with valve gap and baffle top press fit, the coaxial fixedly connected with recoil dish of outer connecting cylinder lower extreme, the outer circumference of recoil dish bottom is integrative to be provided with the retaining ring, the level is provided with the valve clack in the retaining ring, the port is provided with the spacing ring that the internal diameter is less than the internal diameter of a section of thick bamboo, the top is provided with the connector that upwards stretches into the inner connector of outer connecting cylinder, the sealing washer top face is located on the sealing washer top face is located to the bottom face. Under the action of the gravity of the heavy hammer and the elastic centering fine-tuning mechanism, the upper sealing gasket is in pressure connection and sealing on the lower sealing gasket.
The elastic centering fine adjustment mechanism comprises a guide post, an adjusting bolt, a spring, a cushion block, an upper center seat and a lower center seat, wherein the cushion block is arranged on a partition plate in an inner connecting cylinder, the lower end of the lower center seat is propped against the cushion block, the guide post is slidably arranged in a guide hole, an installation groove is formed in the bottom of the guide post, an upper conical groove and a lower conical groove are respectively formed in the center of the upper surface of the guide post and the top surface of the installation groove, the upper center seat is arranged in the installation groove, the upper center of the upper center seat extends into the lower conical groove, the upper end and the lower end of the spring are respectively arranged on the lower portion of the upper center seat and the upper portion of the lower center seat, the adjusting bolt is vertically arranged, the adjusting bolt is in threaded connection with a valve cover, the lower end of the adjusting bolt is in a sharp structure, and the lower end of the adjusting bolt is propped against the upper conical groove, and the adjusting bolt is in threaded connection with a first locking nut in press fit with the top of the valve cover.
The outer circle of the upper part of the valve seat is in threaded connection with an adjusting ring, the outer circle of the upper part of the adjusting ring is of a conical structure with a thin upper part and a thick lower part, and the upper part of the adjusting ring stretches into the check ring and forms an adjusting gap with the inner circle of the check ring.
The lower part threaded connection in valve body left side has locking screw, and locking screw sets up along controlling the direction level, and the excircle of adjusting the circle is tooth form structure, and locking screw's right-hand member stretches into in the recess that forms between the tooth form structure, threaded connection has with valve body left surface top press fit's second lock nut on the locking screw.
The outer circle of the inner connecting cylinder is in threaded connection inside the outer connecting cylinder, and the lower end of the outer connecting cylinder is in spot welding connection with the outer circle of the inner connecting cylinder.
By adopting the technical scheme, the invention has the following technical effects:
1. adopts a built-in dead weight sealing surface structure: the valve body seals the medium, the fluid medium can seal in valve body through the valve seat, valve clack; the dead weight of the combination of the heavy hammer and the recoil disc is balanced to the opening pressure, so that the sealing is more reliable; the adjusting clearance between the adjusting ring matched with the valve seat and the check ring at the bottom of the recoil disk ensures that the air flow action area and recoil when the valve is opened and the recoil is neutral, and the air flow recoil direction is changed, so that the valve is easy to be opened, the recoil and the recoil pressure are easy to be adjusted to the standard requirement and stable action repeatability. And dust can not enter the elastic centering fine adjustment mechanism, so that the motion friction between the guide parts is reduced, and the performance of the valve is improved and stabilized.
2. Adopt the structure of low pressure fine setting: the spring acts on the upper part of the recoil disc, and the setting pressure of the low-pressure safety valve is slightly adjusted by screwing the screw thread between the adjusting bolt and the valve cover. The gravity center of the heavy hammer moves downwards to directly act on the valve clack, and the size deviation of the parts directly influences the action performance of the valve at the beginning of opening and jumping of the valve. In the structure of low-pressure fine adjustment, the upper part of the recoil disc is provided with a spring for assisting in fine adjustment of pressure, and the valve clack has stable performance and quick seat returning sealing when being opened and discharged at a jump; in addition, the spring force acts on the valve clack and the valve seat in a trace way, so that the upper sealing gasket is always in contact with the lower sealing gasket in the transportation process of the safety valve, no collision is generated, and the damage of the sealing surface is reduced.
3. The arrangement of the upper conical groove, the lower part of the upper center seat and the lower center seat can ensure that the acting force of the spring acts on the partition plate, and the partition plate acts downwards on the recoil disc to have a centering effect, so that the stability of the valve during opening is ensured.
4. When the air flow recoil direction needs to be adjusted, the second lock nut is loosened firstly, then the locking screw is unscrewed and removed, the tooth-shaped structure is subjected to tooth pulling rotation operation through the locking screw mounting screw hole on the left side of the valve body, the adjusting ring is enabled to rotate to ascend or descend outside the valve seat, and the purpose of forming a conical adjusting gap between the upper part of the adjusting ring and the conical structure of the retainer ring is achieved.
5. The distance from the upper end surface of the heavy hammer to the inner end surface of the valve cover is the designed opening height of the valve; the inner connecting cylinder is in threaded connection with the outer connecting cylinder, the opening height of the valve can be conveniently adjusted during initial installation, and when the height is adjusted to a specified requirement, the lower end of the outer connecting cylinder is in spot welding connection with the outer circle of the inner connecting cylinder.
In summary, the installation interface at the bottom of the valve body is installed on the pressure vessel or the pipeline, so that under the condition that the pressure of the working pipeline is low, a fine adjustment space exists, and the pressure vessel and the pipeline are better protected; the valve clack, the valve seat, the heavy hammer and other built-in structures can better complete sealing without being influenced by external environment under the conditions that the external environment has larger pollution, particles, dust and other mediums; and can be adjusted when the pressure needs to be slightly adjusted. And the safety valve is opened under low pressure, the tripping discharge and the seat returning action performance meet the standard requirements, and the repeatability of the action performance is stable and reliable. The device overcomes the defects that the external design of the heavy hammer is easy to leak, the valve is opened when the external pad is damaged, the tripping and seat returning action performance cannot meet the standard requirement, and the action repeatability is poor.
The valve has high sealing performance, high stability of lifting guide and verticality of the valve clack, high valve sensitivity due to self-weight of the heavy hammer matched with the elastic force adjustment of the spring, and good opening, lifting and seat returning action performance and action stability. Is suitable for equipment and pipelines of E-stage steam, air boilers and similar mediums with low pressure and working temperature less than or equal to 200 ℃.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Description of the embodiments
As shown in figure 1, the low-pressure fine-tuning built-in dead weight type safety valve comprises a valve body 1 and a heavy hammer 2, wherein the right side and the bottom of the valve body 1 are respectively provided with a mounting interface 3, the lower part in the valve body 1 is provided with a valve seat 4, the top of the valve body 1 is matched and centered through a spigot structure and is fixedly provided with a valve cover 6 through a mounting bolt 5, the valve cover 6 and the valve body 1 are ensured to be positioned on the same central line by the matching precision of convex-concave spigot, the valve cover 6, the valve cover 1 and the valve seat 4, the heavy hammer 2 is slidably arranged in the valve cover 6, the outer circle of the heavy hammer 2 is matched with the inner circle of the valve cover 6, the total guide is lifted when the valve is opened, discharged and returns to the seat, the lower part of the heavy hammer 2 stretches into the upper part in the valve body 1, the heavy hammer 2 is internally provided with an upper and lower transparent guide hole 7, the central line of the guide hole 7 coincides with the central line of the valve seat 4, the guide hole 7 is internally provided with an elastic centering fine tuning mechanism, the bottom of the heavy hammer 2 is fixedly connected with an outer connecting cylinder 8 which is concentric with the guide hole 7 and has the same inner diameter, an inner connecting cylinder 9 is fixedly arranged in the outer connecting cylinder 8 in a coaxial direction, a baffle plate 10 is fixedly arranged in the inner connecting cylinder 9, the upper end and the lower end of an elastic centering fine adjustment mechanism are respectively in jacking fit with a valve cover 6 and the baffle plate 10, the lower end of the outer connecting cylinder 8 is fixedly connected with a recoil disk 11 in a coaxial direction, a retainer ring 12 is integrally arranged on the outer circumference of the bottom of the recoil disk 11, a valve clack 13 is horizontally arranged in the retainer ring 12, a limiting ring 14 with the inner diameter smaller than the inner diameter of the inner connecting cylinder 9 is arranged at the lower port of the inner connecting cylinder 9, a connector 15 which upwards extends into the outer connecting cylinder 8 through the limiting ring 14 is arranged at the top of the valve clack 13, a clamping ring 16 which is positioned above the limiting ring 14 is arranged on the outer circumference of the connector 15, an upper sealing gasket 17 is arranged on the bottom of the valve clack 13, and a lower sealing gasket 18 is arranged on the upper end surface of the valve seat 4. Under the action of the gravity of the weight 2 and the elastic centering fine adjustment mechanism, the upper sealing gasket 17 is in pressure connection and sealing on the lower sealing gasket 18.
The elastic centering fine adjustment mechanism comprises a guide post 19, an adjusting bolt 20, a spring 21, a cushion block 22, an upper center seat 23 and a lower center seat 24, wherein the cushion block 22 is arranged on a partition plate 10 in an inner connecting cylinder 9, the lower end of the lower center seat 24 is propped against the cushion block 22, the guide post 19 is slidably arranged in a guide hole 7, an installation groove 25 is formed in the bottom of the guide post 19, an upper conical groove 26 and a lower conical groove 27 are respectively formed in the center of the upper surface of the guide post 19 and the top surface of the installation groove 25, the upper center seat 23 is arranged in the installation groove 25, the upper center of the upper center seat 23 stretches into the lower conical groove 27, the upper end and the lower end of the spring 21 are respectively arranged on the lower portion of the upper center seat 23 and the upper portion of the lower center seat 24, the adjusting bolt 20 is vertically arranged, the adjusting bolt 20 is in threaded connection with the valve cover 6, the lower end of the adjusting bolt 20 is in a sharp structure, the lower end of the adjusting bolt 20 is propped against the upper conical groove 26, and a first locking nut 28 in press fit with the top of the valve cover 6 is in a threaded connection mode.
The outer circle of the upper part of the valve seat 4 is in threaded connection with an adjusting ring 29, the outer circle of the upper part of the adjusting ring 29 is of a conical structure with a thin upper part and a thick lower part, and the upper part of the adjusting ring 29 extends into the check ring 12 and forms an adjusting gap 30 with the inner circle of the check ring 12.
The lower part threaded connection in the left side of valve body 1 has locking screw 31, and locking screw 31 sets up along controlling the direction level, and the excircle of adjusting circle 29 is tooth form structure 32, and locking screw 31's right-hand member stretches into in the recess that forms between tooth form structure 32, and locking screw 31 goes up threaded connection has with valve body 1 left surface roof pressure fit's second lock nut 33.
The outer circle of the inner connecting cylinder 9 is in threaded connection inside the outer connecting cylinder 8, and the lower end of the outer connecting cylinder 8 is in spot welding connection with the outer circle of the inner connecting cylinder 9.
The working principle and the technical effect of the invention are as follows:
1. adopts a built-in dead weight sealing surface structure: the valve body 1 seals media, and the fluid media can be sealed in the valve body 1 through the valve seat 4 and the valve clack 13; the dead weight of the combination of the heavy hammer 2 and the recoil disc 11 is balanced to the opening pressure, so that the sealing is more reliable; the adjusting ring 29 matched on the valve seat 4 and the adjusting gap 30 between the check rings 12 at the bottom of the recoil disc 11 ensure that the air flow action area and recoil when the valve is opened and the recoil is neutral, and the direction of the air flow recoil is changed, so that the valve opening, the recoil and the recoil pressure are easy to be adjusted to the standard requirements and the stable action repeatability. And dust can not enter the elastic centering fine adjustment mechanism, so that the motion friction between the guide parts is reduced, and the performance of the valve is improved and stabilized.
2. Adopt the structure of low pressure fine setting: the spring 21 acts on the upper portion of the recoil plate 11, and the setting pressure of the low pressure relief valve is slightly adjusted by screwing the screw thread between the adjusting bolt 20 and the valve cap 6. The gravity center of the heavy hammer 2 moves downwards to directly act on the valve clack 13, and the size deviation of the parts directly influences the action performance of the valve at the beginning of opening and jumping of the valve. In the low-pressure fine tuning structure, a spring 21 is designed at the upper part of the recoil disc 11 to assist in fine tuning pressure, and the valve clack 13 has stable performance and quick recoil seal during opening and tripping discharge; in addition, the force of the spring 21 acts on the valve clack 13 and the valve seat 4 in a trace amount, so that the upper sealing gasket 17 is always contacted with the lower sealing gasket 18 in the transportation process of the safety valve, no collision is generated, and the damage of the sealing surface is reduced.
3. The arrangement of the upper conical groove 26, the lower conical groove 27, the lower part of the upper center seat 23 and the lower center seat 24 ensures that the acting force of the spring 21 acts on the partition board 10, and the partition board 10 acts downwards on the recoil disc 11 to have centering effect, so that the stability of the valve when being opened is ensured.
4. When the air flow recoil direction needs to be adjusted, the second lock nut 33 is loosened, the locking screw 31 is unscrewed and removed, the toothed structure 32 is subjected to tooth pulling rotation operation through the installation screw hole of the locking screw 31 on the left side of the valve body 1, the adjusting ring 29 is enabled to rotate to ascend or descend outside the valve seat 4, and the purpose of forming a conical adjusting gap 30 between the upper part of the adjusting ring 29 and the conical structure of the retainer ring 12 is achieved.
5. The distance from the upper end surface of the heavy hammer 2 to the inner end surface of the valve cover 6 is the valve design opening height; the inner connecting cylinder 9 is in threaded connection with the outer connecting cylinder 8, the opening height of the valve can be conveniently adjusted during initial installation, and when the height is adjusted to the specified requirement, the lower end of the outer connecting cylinder 8 is in spot welding connection with the outer circle of the inner connecting cylinder 9.
The present embodiment is not limited in any way by the shape, material, structure, etc. of the present invention, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention are all included in the scope of protection of the technical solution of the present invention.
Claims (3)
1. The utility model provides a built-in dead weight formula relief valve of low pressure fine setting, includes valve body and weight, and valve body right side and bottom all are provided with the installation interface, and the lower part is provided with the disk seat in the valve body, and the valve body top is through tang structure cooperation centering and through the fixed valve gap that is provided with of installation bolt, its characterized in that: the inner connecting cylinder is coaxially and fixedly arranged in the outer connecting cylinder, the inner connecting cylinder is internally and fixedly provided with a baffle plate, the upper end and the lower end of the elastic centering fine tuning mechanism are respectively in pressing fit with the valve cover and the baffle plate, the lower end of the outer connecting cylinder is coaxially and fixedly connected with a recoil disc, the outer circumference of the bottom of the recoil disc is integrally provided with a check ring, the inner side of the check ring is horizontally provided with a valve clack, the lower port of the inner connecting cylinder is provided with a limiting ring with the inner diameter smaller than the inner diameter of the inner connecting cylinder, the top of the valve clack is provided with a connector which upwards penetrates through the limiting ring and stretches into the outer connecting cylinder, the outer circumference of the connector is provided with a clamping ring positioned above the limiting ring, the bottom surface of the valve clack is provided with an upper sealing gasket, and the upper end face of the valve seat is provided with a lower sealing gasket;
under the action of the gravity of the heavy hammer and the elastic centering fine-tuning mechanism, the upper sealing gasket is in pressure joint sealing on the lower sealing gasket;
the elastic centering fine adjustment mechanism comprises a guide post, an adjusting bolt, a spring, a cushion block, an upper center seat and a lower center seat, wherein the cushion block is arranged on a partition plate in an inner connecting cylinder, the lower end of the lower center seat is propped against the cushion block, the guide post is slidably arranged in a guide hole, an installation groove is formed in the bottom of the guide post, an upper conical groove and a lower conical groove are respectively formed in the centers of the upper surface of the guide post and the top surface of the installation groove, the upper center seat is arranged in the installation groove, the upper center of the upper center seat extends into the lower conical groove, the upper end and the lower end of the spring are respectively arranged at the lower part of the upper center seat and the upper part of the lower center seat, the adjusting bolt is vertically arranged, the adjusting bolt is in threaded connection with a valve cover, the lower end of the adjusting bolt is in a sharp structure, the lower end of the adjusting bolt is propped against the upper conical groove, and a first locking nut in press fit with the top of the valve cover is in a threaded connection manner;
the outer circle of the upper part of the valve seat is in threaded connection with an adjusting ring, the outer circle of the upper part of the adjusting ring is of a conical structure with a thin upper part and a thick lower part, and the upper part of the adjusting ring stretches into the check ring and forms an adjusting gap with the inner circle of the check ring.
2. The low pressure trim internal dead weight relief valve of claim 1 wherein: the lower part threaded connection in valve body left side has locking screw, and locking screw sets up along controlling the direction level, and the excircle of adjusting the circle is tooth form structure, and locking screw's right-hand member stretches into in the recess that forms between the tooth form structure, threaded connection has with valve body left surface top press fit's second lock nut on the locking screw.
3. The low pressure trim internal dead weight relief valve of claim 1 wherein: the outer circle of the inner connecting cylinder is in threaded connection inside the outer connecting cylinder, and the lower end of the outer connecting cylinder is in spot welding connection with the outer circle of the inner connecting cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910344872.2A CN109958802B (en) | 2019-04-26 | 2019-04-26 | Low-pressure fine-tuning built-in dead weight type safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910344872.2A CN109958802B (en) | 2019-04-26 | 2019-04-26 | Low-pressure fine-tuning built-in dead weight type safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109958802A CN109958802A (en) | 2019-07-02 |
| CN109958802B true CN109958802B (en) | 2024-04-02 |
Family
ID=67026604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910344872.2A Active CN109958802B (en) | 2019-04-26 | 2019-04-26 | Low-pressure fine-tuning built-in dead weight type safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109958802B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88201050U (en) * | 1988-01-28 | 1988-11-02 | 绍兴市工业科学设计研究院 | Dead weight type safe valve |
| CN203309247U (en) * | 2013-05-31 | 2013-11-27 | 浙江恒华阀门有限公司 | Spring full lift safety valve |
| CN203809801U (en) * | 2014-04-22 | 2014-09-03 | 四川成都空分配套阀门有限公司 | Low-temperature full lift safety valve |
| CN104141814A (en) * | 2014-07-16 | 2014-11-12 | 开封市瑞发高中压阀门有限公司 | Three-sleeve elastic self-sealing safety valve |
| CN106246938A (en) * | 2016-09-30 | 2016-12-21 | 王瑞卿 | Combination adjustable elastic seals flap High Temperature High Pressure relief valve |
| CN209892816U (en) * | 2019-04-26 | 2020-01-03 | 开封市瑞发高中压阀门有限公司 | Low-pressure fine-adjustment built-in dead weight type safety valve |
-
2019
- 2019-04-26 CN CN201910344872.2A patent/CN109958802B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88201050U (en) * | 1988-01-28 | 1988-11-02 | 绍兴市工业科学设计研究院 | Dead weight type safe valve |
| CN203309247U (en) * | 2013-05-31 | 2013-11-27 | 浙江恒华阀门有限公司 | Spring full lift safety valve |
| CN203809801U (en) * | 2014-04-22 | 2014-09-03 | 四川成都空分配套阀门有限公司 | Low-temperature full lift safety valve |
| CN104141814A (en) * | 2014-07-16 | 2014-11-12 | 开封市瑞发高中压阀门有限公司 | Three-sleeve elastic self-sealing safety valve |
| CN106246938A (en) * | 2016-09-30 | 2016-12-21 | 王瑞卿 | Combination adjustable elastic seals flap High Temperature High Pressure relief valve |
| CN209892816U (en) * | 2019-04-26 | 2020-01-03 | 开封市瑞发高中压阀门有限公司 | Low-pressure fine-adjustment built-in dead weight type safety valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109958802A (en) | 2019-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210601013U (en) | Lever floating ball type drain valve with piston exhaust device | |
| CN208331361U (en) | A kind of petroleum pipeline explosion relief valve | |
| CN109958802B (en) | Low-pressure fine-tuning built-in dead weight type safety valve | |
| CN209892816U (en) | Low-pressure fine-adjustment built-in dead weight type safety valve | |
| CN201246502Y (en) | Safe oil relief valve | |
| CN210770475U (en) | Threaded safety valve | |
| KR101856161B1 (en) | Water Hammer Arrester | |
| CN208295215U (en) | A kind of positioning compensation formula safety valve | |
| CN108679279B (en) | Built-in safety valve | |
| CN207278967U (en) | A kind of automobile balance tank cover with pressure relief | |
| CN110566800A (en) | Lever floating ball type drain valve with piston exhaust device | |
| CN209892810U (en) | Bellows balanced type protection safety valve with sleeve | |
| CN103318015A (en) | Fuel tank for forklift | |
| CN211082978U (en) | Hard-seal fuel oil back pressure valve of diesel engine | |
| CN210800151U (en) | High-temperature-resistant one-way valve | |
| CN203372057U (en) | Forklift fuel tank | |
| CN212177917U (en) | Corrugated pipe valve combining plane sealing and conical surface sealing | |
| CN202001404U (en) | Hydraulic power accumulator of engineering machinery | |
| CN113653807A (en) | Electric vacuum regulating valve for uranium concentration plant | |
| CN211693594U (en) | Corrugated pipe gate valve | |
| CN216867511U (en) | Stop valve for refrigeration | |
| CN216479124U (en) | Bellows sealing spring type safety valve | |
| CN219639629U (en) | Valve with pressure detection function | |
| CN219062555U (en) | Valve cavity sealing structure and safety valve | |
| CN219452896U (en) | Bellows sealing stop valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |