CN221258583U - Natural gas low pressure pipeline detection device - Google Patents
Natural gas low pressure pipeline detection device Download PDFInfo
- Publication number
- CN221258583U CN221258583U CN202321811475.XU CN202321811475U CN221258583U CN 221258583 U CN221258583 U CN 221258583U CN 202321811475 U CN202321811475 U CN 202321811475U CN 221258583 U CN221258583 U CN 221258583U
- Authority
- CN
- China
- Prior art keywords
- pipeline
- pressure
- natural gas
- low
- detection device
- 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
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 239000003345 natural gas Substances 0.000 title claims abstract description 38
- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 27
- 230000001502 supplementing effect Effects 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 239000013589 supplement Substances 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a natural gas low-pressure pipeline detection device which comprises a connecting mechanism and a pressure gauge which are mutually communicated through pipelines, wherein a three-way joint is arranged on the pipeline which is communicated with the connecting mechanism and the pressure gauge, the other end of the three-way joint is communicated with a pressure supplementing device through the pipeline, the pressure supplementing device supplements gas into the pipeline until the pressure of the pipeline reaches a preset value, and a one-way stop valve and a gas release valve are sequentially arranged on the pipeline which is communicated with the pressure supplementing device and the three-way joint. The natural gas low-pressure pipeline detection device detects whether leakage exists in the natural gas low-pressure pipeline or not, timely finds out problems, and avoids endangering life and property safety of users.
Description
Technical Field
The utility model belongs to the technical field of natural gas pipelines, and particularly relates to a natural gas low-pressure pipeline detection device.
Background
Natural gas is a green, environment-friendly, economical, safe and reliable high-quality energy source. When the natural gas is transported, a natural gas pipeline is needed, and when the natural gas enters home, a low-pressure pipeline is usually adopted for transportation, and although the natural gas in the pipeline is in a low-pressure state at this time, the natural gas leakage can be caused by the damage of the low-pressure pipeline, so that the life and property safety of a user can be directly endangered.
The detection of the low-pressure pipeline detection device disclosed at present on the natural gas pipeline is usually carried out in the pipeline use process, the natural gas leakage condition is found in real time, and the warning is timely carried out. For example, the prior art with the application number CN201920150587.2 detects natural gas in the gas suction pipeline in real time through a concentration detector, and if natural gas leakage is detected, the person is informed in time through an alarm unit. However, when the device is used, the device is completely fixed with a low-pressure pipeline, and although the leakage condition of a certain section of pipeline can be well detected, the device is mainly aimed at a gas pipeline in a use state, is not suitable for the gas tightness detection of an unused pipeline, and has insufficient portability. And the existing equipment for detecting the air tightness of unused pipelines is generally heavy and inconvenient to move, such as a fuel gas air tightness detection testing machine with the model number of SUP-qm. In view of the above, a natural gas low pressure pipeline detection device is proposed to solve the above problems.
Disclosure of utility model
The utility model aims to provide a natural gas low-pressure pipeline detection device which can be carried about, can detect whether leakage exists in a natural gas low-pressure pipeline anytime and anywhere, can find problems in time, and can avoid endangering life and property safety of users.
The technical scheme includes that the natural gas low-pressure pipeline detection device comprises a connecting mechanism and a pressure gauge which are mutually communicated through pipelines, a three-way joint is arranged on the pipeline which is communicated with the connecting mechanism and the pressure gauge, the other end of the three-way joint is communicated with a pressure supplementing device through the pipeline, the pressure supplementing device supplements gas in the pipeline until the pressure of the pipeline reaches a preset value, and a one-way stop valve and a gas release valve are sequentially arranged on the pressure supplementing device and the three-way joint communicating pipeline.
The present utility model is also characterized in that,
Further, the pressure compensating device is an electric pressure compensating device, the electric pressure compensating device comprises a shell, one end of the inner wall of the shell is fixedly connected with a linear motor, an output shaft of the linear motor is connected with a piston plate a, and the linear motor controls the piston plate a to reciprocate in the shell;
The casing is kept away from linear electric motor one end and is provided with the gas outlet, the gas outlet passes through the pipeline and is connected with three way connection, and it has the through-hole to open between piston plate a and the gas outlet to correspond to the casing lateral wall, and sealing connection has the check valve in the through-hole, and the casing outside gas gets into the casing from the check valve.
Further, one side of the piston plate a far away from the linear motor is connected with a piston plate b through a spring, opposite sides of the piston plate a and the piston plate b are connected with contact switches, positions of the two contact switches correspond to each other, a warning lamp is further arranged on the side wall of the shell, the warning lamp is connected with the contact switches in series through a circuit, and the contact switches are connected with the linear motor in parallel through a circuit.
Further, the pressure supplementing device is an air bag, and a gas transmission port of the air bag is connected with the three-way joint through a pipeline.
Further, the connecting mechanism comprises a connecting pipe, an internal thread is milled on the inner side of the connecting pipe, and the connecting pipe is connected with a natural gas low-pressure pipeline through the internal thread; the welding of connecting pipe bottom has the binding off pipe, the binding off pipe is whole to be the toper, and binding off pipe diameter diminishes gradually along keeping away from the connecting pipe direction, binding off pipe keeps away from connecting pipe one end and is connected with three way connection through the pipeline.
Further, the connecting pipe top is connected with the sleeve pipe, the sleeve pipe lateral wall is opened radially has a plurality of screw hole, and a plurality of screw hole is along sleeve pipe circumference evenly distributed, threaded hole internal thread has the dead lever, the inboard one end of sleeve pipe is arranged in to the dead lever is connected with the slipmat.
Further, the inner wall of the sleeve is adhered with a sealing ring, the side wall of the sealing ring is provided with a containing groove for containing the anti-skid pad, and the groove depth of the containing groove is not less than the thickness of the anti-skid pad.
Further, ball valves are arranged on the pressure gauge and the three-way joint communication pipeline.
Compared with the prior art, the natural gas low-pressure pipeline detection device has the beneficial effects that excessive pressure is not required to be injected when the gas tightness of the low-pressure pipeline is detected, the gas is injected into the low-pressure pipeline through the portable pressure supplementing device such as an air bag or an electric pressure supplementing device, so that the whole pipeline maintains a constant pressure state, then whether the detected low-pressure pipeline is damaged or not is judged by observing the numerical change of the pressure gauge, the gas tightness of the low-pressure pipeline can be pre-detected before the low-pressure pipeline is used, the life and property safety of a user is prevented from being damaged, the sealing device can be detected regularly, real-time maintenance and replacement are realized, and the normal operation of equipment is ensured. The utility model has simple integral structure, convenient disassembly, assembly and operation and easy operation of staff.
Drawings
FIG. 1 is a schematic diagram of a natural gas low pressure pipeline detection device according to the present utility model;
FIG. 2 is a schematic structural view of a connection mechanism in a natural gas low pressure pipeline inspection device according to the present utility model;
FIG. 3 is a schematic structural diagram of a pressure compensating device in a natural gas low pressure pipeline detection device according to the present utility model;
FIG. 4 is a schematic view of the structure of the air bag used as the pressure compensating device of the present utility model.
In the figure, 1, a connecting mechanism, 11, a sleeve, 12, a connecting pipe, 13, a fixing rod, 14, an anti-slip pad, 15, a sealing ring, 16, a closing pipe and 17, and internal threads;
2. The pressure compensating device comprises a pressure compensating device, a linear motor, an output shaft, a piston plate a, a piston plate 24, a piston plate b, a contact switch, a spring, a warning lamp, a one-way valve and an air outlet, wherein the warning lamp, the one-way valve and the air outlet are arranged in sequence, and the pressure compensating device comprises a linear motor, a output shaft, a piston plate a, a piston plate 24, a piston plate b, a contact switch, a spring, a warning lamp, a one-way valve and an air outlet;
3. The device comprises a pressure gauge, a three-way connector, a one-way stop valve, a ball valve, a relief valve and an air bag.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The structure of the natural gas low-pressure pipeline detection device is shown in figure 1, the natural gas low-pressure pipeline detection device comprises a connecting mechanism 1 and a pressure gauge 3 which are mutually communicated through pipelines, wherein the pressure gauge 3 can adopt a common pressure gauge or a digital pressure gauge, a three-way joint 4 is arranged on the pipeline which is communicated with the connecting mechanism 1 and the pressure gauge 3, a ball valve 6 is arranged on the pipeline which is communicated with the pressure gauge 3 and the three-way joint, and the ball valve 6 can effectively prevent the pressure gauge 3 from being damaged due to overpressure; the other end of the three-way joint 4 is communicated with a pressure compensating device 2 through a pipeline, and the pressure compensating device 2 and the three-way joint 4 are sequentially provided with a one-way stop valve 5 and a release valve 7 on the communicated pipeline, and the pressure compensating device 2 supplements gas in the pipeline until the pressure of the pipeline reaches a preset value.
As shown in fig. 2, the connecting mechanism 1 comprises a connecting pipe 12, wherein an internal thread 17 is milled on the inner side of the connecting pipe 12, and the connecting pipe 12 is connected with a natural gas low-pressure pipeline through the internal thread 17; the bottom of the connecting pipe 12 is welded with a closing-in pipe 16, the whole closing-in pipe 16 is conical, the diameter of the closing-in pipe 16 gradually decreases along the direction away from the connecting pipe 12, and one end of the closing-in pipe 16 away from the connecting pipe 12 is connected with the three-way joint 4 through a pipeline.
The top of the connecting pipe 12 is connected with the sleeve 11, a plurality of threaded holes are formed in the side wall of the sleeve 11 along the radial direction, the threaded holes are uniformly distributed along the circumferential direction of the sleeve 11, the fixing rod 13 is penetrated into the threaded holes, one end of the fixing rod 13, which is arranged at the inner side of the sleeve 11, is connected with the anti-slip pad 14, the fixing rod 13 moves towards the axis of the sleeve 11 to complete the clamping fixation of the connecting end of the low-pressure pipeline by rotating the fixing rod 13, the anti-slip pad 14 further ensures the stability of the clamping, and the accuracy of the detection result is influenced by the fact that the internal threads 17 of the connecting pipe 12 are loosened with the connecting port of the low-pressure pipeline due to the rising of pressure after gas is injected into the pipeline is avoided.
The inner wall of the sleeve 11 is adhered with a sealing ring 15, the side wall of the sealing ring 15 is provided with a containing groove for containing the anti-skid pad 14, the groove depth of the containing groove is not less than the thickness of the anti-skid pad 14, the sealing ring 15 further ensures the tightness of the connecting mechanism 1 and the low-pressure pipeline connecting port, and the accuracy of the detection result of the detection device on the air tightness of the low-pressure pipeline is greatly improved.
As shown in fig. 3, the pressure compensating device 2 is an electric pressure compensating device, and the electric pressure compensating device comprises a shell, one end of the inner wall of the shell is fixedly connected with a linear motor 21, an output shaft 22 of the linear motor 21 is connected with a piston plate a23, and the linear motor 21 controls the piston plate a23 to reciprocate in the shell; the casing is kept away from linear electric motor 21 one end and is provided with gas outlet 29, and gas outlet 29 passes through the pipeline to be connected with three way connection 4, and it has the through-hole to open between casing lateral wall corresponding piston plate a23 and the gas outlet 29, and sealing connection has check valve 28 in the through-hole, and the casing outside gas gets into the casing from check valve 28. That is, the output shaft 22 of the linear motor 21 drives the piston plate a23 to reciprocate in the housing, when the piston plate a23 moves towards the linear motor 21, because the pressure in the housing becomes small, the air outside the housing enters the housing through the one-way valve 28, and at this time, when the piston plate a23 moves away from the linear motor 21, only the air outlet 29 can enter the pipeline connected with the three-way joint 4, so that the injection of the low-pressure pipeline is completed.
In order to protect the pressure maintaining device 2 and avoid damage to the pressure compensating device 2 caused by overlarge pipeline pressure, one side of the piston plate a23, far away from the linear motor 21, is connected with the piston plate b24 through a spring 26, meanwhile, the opposite sides of the piston plate a23 and the piston plate b24 are both also connected with the contact switches 25, the positions of the two contact switches 25 correspond to each other, when the pressure in the shell is overlarge, the piston plate b24 is extruded to move towards the piston plate a23, the contact switches 25 are arranged in parallel with the linear motor 21, when the piston plate b24 is extruded to a certain position towards the piston plate a23, the contact switches 25 at the two sides are mutually contacted, and the power supply of the direct current motor 21 is cut off, so that the aim of closing the direct current motor 21 is fulfilled, and the injection operation is not performed. When the direct current motor 21 stops working, a worker can pay attention to that the warning lamp 27 is further arranged on the side wall of the shell, the warning lamp 27 is connected with the contact switch 25 in series through a circuit, namely, when the contact switches 25 on the two sides are contacted with each other, the warning lamp 27 is turned on, and the direct current motor 21 is turned off.
As shown in fig. 4, in order to further improve portability of the detection device, an air bag 8 may be used as the pressure compensating device 2, and injection is manually performed by a worker, where the air bag 8 is usually made of soft materials such as rubber, and is an ellipsoid, an air inlet and an air outlet are provided on the air bag 8, a unidirectional sheet structure that only allows external air to enter the air bag 8 is provided on the inner side of the air bag 8 corresponding to the air inlet, the unidirectional sheet structure is hollow and cylindrical, and a sheet obliquely provided is provided on the inner side of the cylinder. When the external air enters the air bag 8, the sheet is pushed by the air flow, the external air smoothly enters the air bag 8, and the air entering the air bag 8 cannot be discharged from the air inlet because the sheet is limited by the cylindrical inner wall. Preferably, the air inlet of the air bag 8 is provided as a one-way valve.
According to the technical scheme, the air outlet of the air bag 8 is connected with the three-way joint 4 through the pipeline, when a worker manually extrudes the air bag 8, air in the air bag 8 can only enter the pipeline through the air outlet, and due to the existence of the one-way stop valve 5, the air entering the pipeline cannot return into the air bag 8, and at the moment, the air pressure in the air bag 8 is smaller than the atmospheric pressure, so that the outside air enters the air bag 8 from the air inlet on the air bag 8, and the circulation air supplementing is sequentially completed. When the air bag 8 is adopted for injection, a worker can judge whether the pressure in the pipeline reaches a preset value or not by observing the value of the pressure gauge 3, and when the value of the pressure gauge 3 reaches the preset value, the air bag 8 is stopped from being extruded, and the one-way stop valve 5 is closed.
When the device is used, the detection device is integrally assembled, then the connecting mechanism 1 is connected with a low-pressure pipeline to be detected, and one end, which is not connected with the low-pressure pipeline, of the low-pressure pipeline is sealed through the plug, so that the detection device and the low-pressure pipeline form a closed inner space; the linear motor 21 of the pressure compensating device 2 is started, the linear motor 21 drives the piston plate a23 and the piston plate b24 to reciprocate, the injection of the low-pressure pipeline is realized, and at the moment, whether the low-pressure pipeline has leakage or not is judged by observing the numerical value of the pressure gauge 3.
When the value of the pressure gauge 3 is unchanged compared with the value of the pressure supplementing device 2 before injection, the position of serious leakage of the low-pressure pipeline is indicated, soap liquid can be smeared or sprayed on the surface of the low-pressure pipeline, the position of damage and leakage of the low-pressure pipeline is judged by observing the position of occurrence of bubbles, and repair or scrapping treatment is selected according to the damage degree;
When the value of the pressure gauge 3 reaches 0.2MPa, the linear motor 21 is manually closed, and the pressure of the low-pressure pipeline is maintained for 30min;
In the pressure keeping time, continuously observing the numerical variation of the pressure gauge 3, if the pressure drop exceeds 10%, indicating that certain leakage exists in the low-pressure pipeline, opening the linear motor 21 at the moment, spraying or smearing soap liquid on the surface of the low-pressure pipeline, judging the leakage position of the low-pressure pipeline according to the position generated by bubbles, and repairing the leakage position;
If the value change of the pressure gauge 3 is not more than 10% continuously observed in the pressure keeping time, the air tightness of the low-pressure pipeline is qualified, the air release valve 7 is opened at the moment, the air in the pipeline is discharged, and the position of the connecting mechanism 1 is replaced by a new low-pressure pipeline to carry out the detection again.
Claims (8)
1. The utility model provides a natural gas low pressure pipeline detection device, its characterized in that includes coupling mechanism (1) and manometer (3) that communicate each other through the pipeline, communicates be provided with three way connection (4) on the pipeline of coupling mechanism (1) and manometer (3), the other end of three way connection (4) has pressure compensating device (2) through the pipeline intercommunication, pressure compensating device (2) are to the pipeline internal make-up gas to pipeline pressure reach the predetermined value, pressure compensating device (2) with three way connection (4) are provided with check valve (5) and air release valve (7) on the pipeline in proper order.
2. The natural gas low-pressure pipeline detection device according to claim 1, wherein the pressure compensating device (2) is an electric pressure compensating device, the electric pressure compensating device comprises a shell, one end of the inner wall of the shell is fixedly connected with a linear motor (21), an output shaft (22) of the linear motor (21) is connected with a piston plate a (23), and the linear motor (21) controls the piston plate a (23) to reciprocate in the shell;
The casing is kept away from linear electric motor (21) one end is provided with gas outlet (29), gas outlet (29) are connected with three way connection (4) through the pipeline, and it has the through-hole to open between casing lateral wall corresponding piston board a (23) and gas outlet (29), and sealing connection has check valve (28) in the through-hole, and casing outside gas gets into the casing from check valve (28).
3. The natural gas low-pressure pipeline detection device according to claim 2, wherein one side of the piston plate a (23) far away from the linear motor (21) is connected with a piston plate b (24) through a spring (26), opposite sides of the piston plate a (23) and the piston plate b (24) are both connected with contact switches (25), positions of the two contact switches (25) correspond to each other, a warning lamp (27) is further arranged on the side wall of the shell, the warning lamp (27) is connected with the contact switches (25) in series through a circuit, and the contact switches (25) are connected with the linear motor (21) in parallel through a circuit.
4. The natural gas low-pressure pipeline detection device according to claim 1, wherein the pressure supplementing device (2) is an air bag (8), and a gas transmission port of the air bag (8) is connected with the three-way joint (4) through a pipeline.
5. The device for detecting the low-pressure pipeline of the natural gas according to any one of claims 1 to 4, wherein the connecting mechanism (1) comprises a connecting pipe (12), an internal thread (17) is milled on the inner side of the connecting pipe (12), and the connecting pipe (12) is connected with the low-pressure pipeline of the natural gas through the internal thread (17); the bottom of the connecting pipe (12) is welded with a closing-in pipe (16), the whole closing-in pipe (16) is conical, the diameter of the closing-in pipe (16) is gradually reduced along the direction away from the connecting pipe (12), and one end of the closing-in pipe (16) away from the connecting pipe (12) is connected with the three-way joint (4) through a pipeline.
6. The natural gas low-pressure pipeline detection device according to claim 5, wherein the top end of the connecting pipe (12) is connected with a sleeve (11), a plurality of threaded holes are formed in the side wall of the sleeve (11) along the radial direction, the plurality of threaded holes are uniformly distributed along the circumferential direction of the sleeve (11), fixing rods (13) penetrate through the threaded holes, and one end, which is arranged on the inner side of the sleeve (11), of the fixing rods (13) is connected with an anti-slip pad (14).
7. The natural gas low-pressure pipeline detection device according to claim 6, wherein a sealing ring (15) is adhered to the inner wall of the sleeve (11), a containing groove for containing the anti-slip pad (14) is formed in the side wall of the sealing ring (15), and the groove depth of the containing groove is not smaller than the thickness of the anti-slip pad (14).
8. The natural gas low-pressure pipeline detection device according to claim 1, wherein ball valves (6) are arranged on the pressure gauge (3) and the three-way joint communication pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321811475.XU CN221258583U (en) | 2023-07-11 | 2023-07-11 | Natural gas low pressure pipeline detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321811475.XU CN221258583U (en) | 2023-07-11 | 2023-07-11 | Natural gas low pressure pipeline detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221258583U true CN221258583U (en) | 2024-07-02 |
Family
ID=91628738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321811475.XU Active CN221258583U (en) | 2023-07-11 | 2023-07-11 | Natural gas low pressure pipeline detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221258583U (en) |
-
2023
- 2023-07-11 CN CN202321811475.XU patent/CN221258583U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217928236U (en) | Prevent acetylene storage bottle of leakage | |
| CN221258583U (en) | Natural gas low pressure pipeline detection device | |
| CN205937059U (en) | Diaphragm both sides pressure differential monitoring protection device | |
| CN114112225A (en) | Testing device for detecting air tightness inside and outside valve | |
| CN201281645Y (en) | Airtight inspection device of sealed cabin under water | |
| CN204677545U (en) | A kind of hydralic hose booster monitoring device | |
| CN220037768U (en) | Large-shaft air supplementing pipe tail end flange mounting structure | |
| CN221325799U (en) | Gas leakage monitoring and early warning device | |
| CN219121659U (en) | Offline inspection device for internal leakage of pneumatic butterfly valve | |
| CN204064559U (en) | The stiffening ring leakage testing device that a kind of pressure stability is high | |
| CN219694476U (en) | Pressure pipeline gas leakage detection mechanism for special equipment | |
| CN217926233U (en) | Portable electric pressure test pump | |
| CN108061216B (en) | Pipeline plugging tool with pressure relief structure | |
| CN210531687U (en) | Pipeline gas safety self-closing valve | |
| CN215759216U (en) | Monitoring device for water replacement condition of suction type jacket foundation grouting | |
| CN213688842U (en) | Heat exchanger gas tightness detection device convenient to maintain | |
| CN102345597B (en) | Ultrahigh-pressure oil pump | |
| CN218865420U (en) | Air tightness test presser for high-pressure rubber pipe | |
| CN224004583U (en) | Mechanical leak detection device for floating pipe | |
| CN216815664U (en) | Anhydrous detection device of intelligence water supply system | |
| CN222993914U (en) | Stainless steel pipeline leak source short-term test device | |
| CN223277489U (en) | Screw hydraulic stretching device of steering engine cylinder cover | |
| CN219301905U (en) | European style transformer sealing experimental device | |
| CN221170850U (en) | Air belt connector capable of exhausting air | |
| CN218270338U (en) | Air temperature type gasifier leakage-proof device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |