CN112304514A - Automatic gas tightness detection device for pipeline gas self-closing valve - Google Patents
Automatic gas tightness detection device for pipeline gas self-closing valve Download PDFInfo
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- CN112304514A CN112304514A CN201910733576.1A CN201910733576A CN112304514A CN 112304514 A CN112304514 A CN 112304514A CN 201910733576 A CN201910733576 A CN 201910733576A CN 112304514 A CN112304514 A CN 112304514A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
- G01M3/08—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds
- G01M3/086—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds for valves
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- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention discloses an automatic air tightness detection device for a pipeline gas self-closing valve, which comprises a machine body, a workbench, an electromechanical control box, a water tank, a valve pulling device, a rack transmission device and a self-closing valve air tightness device, wherein the electromechanical control box is arranged at the lower part of the machine body, the workbench is arranged at the upper part of the electromechanical control box, and the water tank, the valve pulling device, the rack transmission device, the self-closing valve air tightness device and a toggle tooth fixing seat are fixed on the workbench. Automatic, efficient and accurate detection is realized, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of air tightness detection of self-closing valves, in particular to an automatic air tightness detection device for a pipeline gas self-closing valve.
Background
The pipeline gas self-closing valve is a device for ensuring safe use of gas, the pressure and flow state of the gas in a pipeline can be monitored in real time in the use process, and when the gas in the pipeline is used under the conditions of overpressure, underpressure or overflow, the pipeline gas self-closing valve is immediately closed, and the gas supply is cut off to ensure safe use of the gas. In general, a pipeline gas self-closing valve is conveniently connected with a gas stove, and is also integrally installed with a copper ball valve with a pagoda-shaped interface, so that the gas can be conveniently opened and closed.
Since the pipeline gas self-closing valve protects the gas safety, the gas tightness of the pipeline gas self-closing valve and the copper ball valve is qualified, namely: after the pipeline gas self-closing valve is closed, the phenomenon of gas leakage (internal leakage) is strictly prohibited. Such as poor sealability. The pipeline gas self-closing valve itself becomes a dangerous source. Therefore, before the pipeline gas self-closing valve leaves a factory, the air tightness of the self-closing valve and the copper ball valve should be strictly checked. The gas self-closing valve for the pipeline is prevented from having the defect of leakage.
Because the gas tightness check out test set of the gas self-closing valve of the pipeline, there is not unified standard, the check out test set of each manufacturer mainly has the following two kinds at present: 1. ventilating and maintaining the pressure of the self-closing valve, detecting the change of the pressure by using a pressure sensor within a certain time, and detecting whether the gas leakage phenomenon occurs in the pipeline gas self-closing valve or not through the change of the pressure; 2. the gas tightness of the pipeline gas self-closing valve is detected by manual water, the pipeline gas self-closing valve is connected with a pressure gas hose manually and placed into water, a pipeline gas self-closing valve closing button is lifted manually, whether gas exists after the self-closing valve is closed or not is checked, whether bubbles emerge in the water or not is checked by observing whether the self-closing valve is closed or not, and if the bubbles emerge, the self-closing valve is proved to be not closed tightly.
The disadvantages of the first method are: the equipment uses a pressure sensor, and whether gas leaks or not is detected through the change of a pressure signal of the pressure sensor. Because the pressure sensor has measurement errors, and the measurement precision of the sensor is influenced by the changes of external conditions such as measured ambient air pressure, temperature and humidity, if the measurement precision of the pressure sensor cannot meet the tiny leakage of the self-closing valve, the sensor cannot measure the tiny changes of the pressure, and can not accurately measure whether air leaks, so that the measurement errors occur, and the high-precision sensor has high cost and large investment.
In the second method, a method of inputting pressure gas for water detection is used, the air tightness of the self-closing valve can be accurately judged according to whether bubbles emerge in water, but the manual mode is adopted, and the defects of low labor efficiency, low detection speed, high labor cost and the like exist.
Therefore, the automatic gas tightness detection device for the pipeline gas self-closing valve, which is designed for overcoming the defects of the technology and has a simple structure, can be used for automatically controlling the water detection of a product, realizes automatic, efficient and accurate detection, and reduces the cost, is the problem to be solved by the inventor.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an automatic detection device for the air tightness of a pipeline gas self-closing valve, which has a simple structure, can automatically control the water detection of a product, realizes automatic, efficient and accurate detection and reduces the cost.
The technical scheme adopted by the invention for solving the technical problems is as follows: an automatic detection device for gas tightness of a pipeline gas self-closing valve comprises a machine body, a workbench, an electromechanical control box, a water tank, a valve pulling device, a rack transmission device and a self-closing valve air-tight device, wherein the electromechanical control box is arranged at the lower part of the machine body;
the toggle tooth fixing seat is provided with a rotatable connecting rod, one end of the connecting rod is provided with a rotating block for rotating a switch knob, the other end of the connecting rod is provided with toggle teeth, the rotating block is arranged in the water tank, the rotating block is provided with a clamping groove capable of clamping the switch knob, and the toggle tooth fixing seat, the connecting rod and the rotating block jointly form a rotating device of the switch knob;
the rack transmission device comprises a rack transmission cylinder and a rack, and the rack and the poking teeth can be mutually matched and meshed, so that the rack can drive the poking teeth to rotate when moving left and right;
the valve pulling device comprises a pulling cylinder, a valve pulling fixing rod, magnetic absorption blocks and a connecting plate, wherein the valve pulling fixing rod is fixedly arranged on the machine body, the pulling cylinder is arranged on the valve pulling fixing rod, the connecting plate is arranged at the tail end of the pulling cylinder, the magnetic absorption blocks are arranged on the connecting plate at equal intervals, and the positions of the magnetic absorption blocks are respectively arranged corresponding to the positions of the pulling switch during detection;
the self-closing valve air-tight device comprises a fixed plate for fixing the self-closing valve, a base, a bottom plate, a fixed air pipe, a lifting air cylinder for lifting and descending the fixed plate, and a pressing air cylinder for descending the fixed air pipe to enable the fixed air pipe to be tightly connected with an air inlet pipe, wherein the lifting air cylinder is arranged at the top of the machine body, the fixed plate is vertically connected with the bottom plate, the base is fixed on the bottom plate, arranging grooves for placing the self-closing valve are equidistantly distributed on the fixed plate, magnets are arranged on two sides of the arranging grooves, a central shaft of the arranging grooves corresponds to a central shaft of the base, an air channel for detection is arranged in the base, a sealing ring is arranged at the end of the air channel on the base, the air channel is matched and communicated with a ball valve, an air outlet is arranged on, the automatic closing valve is characterized in that a branch pipe is arranged on the vent pipe b, the tail end of the branch pipe is arranged in water in the water tank, a valve b is arranged on the branch pipe, an air inlet connecting pipe on the automatic closing valve is connected with a fixed air pipe in a matched mode, and one side of the fixed air pipe is communicated with a vent pipe a.
Furthermore, the self-closing valve air-tight device and the pushing cylinder are provided with two air-tight devices, and a pressing cylinder is correspondingly arranged on each fixed air pipe.
Furthermore, the workbench is provided with a plurality of slide rails at equal intervals, the rack is arranged on the pushing bottom plate, one side of the pushing bottom plate is connected with the pushing cylinder, the pushing bottom plate is arranged on the slide rails and can move back and forth along the slide rails, the rack transmission cylinder is arranged on the pushing bottom plate, and the pushing cylinder can enable the pushing bottom plate to move back and forth when in work.
Furthermore, the vent pipe a, the vent pipe b and the branch pipe are rubber hoses.
Furthermore, the fixed air pipe is made of stainless steel.
The invention has the beneficial effects that:
1. the pipeline gas self-closing valve is formed by integrally installing the pipeline gas self-closing valve and a copper ball valve, the switch knob can rotate at different angles by driving the cylinder to work through the rack, whether the air tightness is good or not can be detected at multiple angles, and the ventilation and the closing of the pull-up switch can be automatically controlled by pushing the cylinder to work, so that whether the self-closing valve leaks inwards or not can be detected. The magnet is arranged on the two sides of the placing groove, so that the cost is saved, the self-closing valve can be firmly fixed, the looseness of the self-closing valve is prevented, the device is simple in structure, automatic control is adopted to carry out water detection on a product, automatic, efficient and accurate detection is realized through the work of the cylinders with different functions, and the cost is reduced.
Drawings
Fig. 1 is a perspective view of the structure of the present invention.
Fig. 2 is a front view of the structure of the present invention.
Fig. 3 is a left side view of the structure of the present invention in an unused state.
Fig. 4 is a left side view of the structure of the present invention in use.
Fig. 5 is a schematic view of a portion of the structure of fig. 4 according to the present invention.
FIG. 6 is a schematic view of the rack gear and valve-pulling device of the present invention.
Description of reference numerals: 1-body; 2-a workbench; 3-an electromechanical control box; 4-pushing the bottom plate; 5-toggle tooth fixing seat; 6-a water tank; 7-a bottom plate; 8, fixing a plate; 9-self-closing valve; 10-a lifting cylinder; 11-a pull-up switch; 12-pulling the valve fixing rod; 13-a rack drive cylinder; 14-a pushing cylinder; 15-a rack; 16-pulling teeth; 17-a connecting rod; 18-a rotating block; 19-a card slot; 20-a compacting cylinder; 21-ball valve; 22-air inlet connecting pipe; 23-a base; 24-a slide rail; 25-a magnet attracting block; 26-a placement groove; 27-a breather pipe b; 28-sealing ring; 29-switch knob; 30-a breather pipe a; 31-air outlet; 32-fixing the trachea; 33-gas channel; 34-a connecting plate; and 35-pulling the cylinder.
Detailed Description
The invention will now be further illustrated by reference to specific examples, which are intended to be illustrative only and not to limit the scope of the invention. Further, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents may fall within the scope of the invention as defined in the appended claims.
Referring to fig. 1, a perspective view of the structure of the present invention, referring to fig. 2, a front view of the structure of the present invention, referring to fig. 3, a left side view of the structure of the present invention in an unused state, referring to fig. 4, a left side view of the structure of the present invention in an used state, referring to fig. 5, a schematic view of a partial structure of fig. 4 of the present invention, referring to fig. 6, a schematic view of the structure of a rack gear and a valve pulling device of the present invention of a pump, which is a gas tightness automatic detection device for a gas, the automatic water-saving device comprises a machine body 1, a workbench 2, an electromechanical control box 3, a water tank 6, a valve pulling device, a rack transmission device and a self-closing valve air-tight device, wherein the electromechanical control box 3 is arranged at the lower part of the machine body 1, the workbench 2 is arranged at the upper part of the electromechanical control box 3, and the water tank 6, the valve pulling device, the rack transmission device, the self-closing valve air-tight device, a shifting tooth fixing seat 5 and a pushing cylinder 14 are fixed on the workbench 2.
It is provided with rotatable connecting rod 17 to stir on the tooth fixing base 5, and connecting rod 17 one end is provided with the rotatory piece 18 that is used for rotary switch knob 29, and the other end of connecting rod 17 is provided with stirs tooth 16, and rotatory piece 18 sets up in basin 6, is provided with the draw-in groove 19 that can block switch knob 29 on the rotatory piece 18, stirs tooth fixing base 5, connecting rod 17, rotatory piece 18 and constitutes switch knob 29's rotary device jointly.
The rack transmission device comprises a rack transmission cylinder 13 and a rack 15, wherein the rack 15 and the toggle teeth 16 can be mutually matched and meshed, so that the rack 15 can drive the toggle teeth 16 to rotate when moving left and right.
The valve pulling device comprises a pulling cylinder 35, a pulling valve fixing rod 12, a magnetic absorption block 25 and a connecting plate 34, wherein the pulling valve fixing rod 12 is fixedly arranged on the machine body 1, the pulling cylinder 35 is arranged on the pulling valve fixing rod 12, the connecting plate 34 is arranged at the tail end of the pulling cylinder 35, the magnetic absorption blocks 25 are arranged on the connecting plate 34 at equal intervals, and the positions of the magnetic absorption blocks 25 are respectively arranged corresponding to the positions of the pulling switch 11 during detection.
The self-closing valve air-tight device comprises a fixed plate 8 for fixing a self-closing valve 9, a base 23, a bottom plate 7, a fixed air pipe 32, a lifting air cylinder 10 for lifting and descending the fixed plate 8, and a pressing air cylinder 20 for descending the fixed air pipe 32 to enable the fixed air pipe 32 to be tightly connected with an air inlet pipe, wherein the lifting air cylinder 10 is arranged at the top of a machine body 1, the fixed plate 8 is vertically connected with the bottom plate 7, the base 23 is fixed on the bottom plate 7, arranging grooves 26 for arranging the self-closing valve 9 are equidistantly distributed on the fixed plate 8, magnets are arranged on two sides of the arranging grooves 26, the central axis of the arranging grooves 26 corresponds to the central axis of the base 23, an air channel 33 for detection is arranged in the base 23, a sealing ring 28 is arranged at the end of the air channel 33 on the base 23, the air channel 33 is matched and communicated with a ball valve 21, the air pipe b 27 is provided with a branch pipe, the tail end of the branch pipe is arranged in the water tank 6, the branch pipe is provided with a valve b, the air inlet connecting pipe 22 on the self-closing valve 9 is matched and connected with a fixed air pipe 32, and one side of the fixed air pipe 32 is communicated with an air pipe a 30.
The self-closing valve air-tight device and the pushing air cylinder 14 are provided with two, and a pressing air cylinder 20 is correspondingly arranged on each fixed air pipe 32. A plurality of sliding rails 24 are equidistantly arranged on the workbench 2, the rack 15 is arranged on the pushing bottom plate 4, one side of the pushing bottom plate 4 is connected with the pushing cylinder 14, the pushing bottom plate 4 is arranged on the sliding rails 24 and can move back and forth along the sliding rails 24, the rack transmission cylinder 13 is arranged on the pushing bottom plate 4, and the pushing cylinder 14 can enable the pushing bottom plate 4 to move back and forth when in work. The air pipe a 30, the air pipe b 27 and the branch pipes are all rubber hoses, and the fixed air pipe 32 is made of stainless steel.
When the leakage is detected, the self-closing valve 9 is fixed on the fixing plate 8, the magnets are arranged on two sides of the placing groove 26, the self-closing valve 9 is firmly fixed in the placing groove 26 through magnetic attraction due to the fact that the self-closing valve 9 is internally provided with the iron material, the tail end of the ball valve 21 is aligned with an inlet of the gas channel 33 on the base 23, the switch knob 29 is kept in the vertical direction, and meanwhile the valve b is in a closed state.
The compressing cylinder 20 works first, moves the fixed air pipe 32 downwards, and tightly joints the fixed air pipe 32 with the air inlet connecting pipe 22; the lifting cylinder 10 works, and the fixing plate 8 is moved downwards, so that the part below the joint of the self-closing valve 9 and the ball valve 21 is immersed in the water tank 6; the push cylinder switch is turned on, the push cylinder 14 works, the push bottom plate 4 and the rotating device arranged on the push bottom plate 4 move forwards for a certain distance, and the switch knob 29 is clamped in the clamping groove 19 on the rotating block 18 at the moment; let in gas, make gas loop through breather pipe b 27, inside gas passage 33 enters into ball valve 21, open rack drive cylinder switch, move about driving rack 15 through rack drive cylinder 13, thereby it is rotatory to make to stir 16 rotatory piece 18 that drives, switch knob 29 can carry out the rotation of different angles along with rotatory piece 18, thereby the leakproofness in the detection ball valve 21 of ability multi-angle, the device can carry out rotation detection to switch knob 29 many times, guarantee the reliability that detects. If the switch knob is rotated to be in a closed state, if bubbles appear in water, the sealing performance of the part below the self-closing valve 9 is not tight, namely the ball valve 21 leaks outwards, or the sealing performance of the joint of the ball valve 21 and the self-closing valve 9 is poor.
After the leakage detection is finished, the rack transmission cylinder 13 stops working, the pushing cylinder 14 drives the pushing bottom plate 4 and the rotating device to move backwards, the poking teeth 16 are separated from the switch knob 29, and the lifting cylinder 10 drives the self-closing valve air sealing device to move upwards to the position in the natural state.
When the invention detects the inner leakage, the valve b is opened, the valve b is ensured to be in the opening state, and the switch knob 29 is kept to be in the opening state. The pressing cylinder 20 works first, the fixed air pipe 32 moves downwards, the lifting cylinder 10 works after the fixed air pipe 32 is tightly connected and communicated with the air inlet connecting pipe 22, and the fixed plate 8 moves downwards, so that the part below the self-closing valve 9 is immersed into the water in the water tank 6; gas is introduced, and the gas enters the self-closing valve 9 from the vent pipe a 30, the fixed gas pipe 32 and the gas inlet connecting pipe 22 in sequence, because the lifting switch 11 on the self-closing valve 9 is in a closed state in a normal state, if the self-closing valve 9 leaks inwards at the moment, the gas can be introduced into the tail end of the branch pipe from the inside of the self-closing valve 9 continuously along the inside of the ball valve 21, the gas channel 33 and the vent pipe b 27, and therefore when the internal leakage occurs, bubbles can appear at the tail end of the branch pipe arranged in water.
The pulling cylinder switch is turned on, the pulling cylinder 35 works to push the connecting plate 34 to move forwards for a certain distance, the magnet absorption blocks 25 are distributed on the connecting plate 34, the pulling switch 11 is made of iron materials, so the magnet absorption blocks 25 can absorb the pulling switch 11 by magnetic force, and after the pulling switch 11 is absorbed, the interior of the self-closing valve 9 is in an open communication state; after the pulling cylinder 35 works to pull the connecting plate 34 back for a certain distance, the pulling switch 11 will be rebounded to the original state due to the self-closing valve 9, and then the internal leakage detection is continued. Through making a round trip to pulling open and rebounding of carrying the pulling switch, can leak the condition in the multiple detection, guarantee the reliability of testing result.
After the inner leakage detection is finished, the lifting cylinder 10 drives the self-closing valve air-tight device to move upwards to a position in a natural state, so that all parts of the device are in an original state.
Claims (5)
1. The utility model provides a be used for pipeline gas self-closing valve gas tightness automatic checkout device which characterized in that: the automatic valve pulling device comprises a machine body, a workbench, an electromechanical control box, a water tank, a valve pulling device, a rack transmission device and a self-closing valve air-tight device, wherein the electromechanical control box is arranged at the lower part of the machine body, the workbench is arranged at the upper part of the electromechanical control box, and the water tank, the valve pulling device, the rack transmission device, the self-closing valve air-tight device, a shifting tooth fixing seat and a pushing cylinder are fixed on the workbench;
the toggle tooth fixing seat is provided with a rotatable connecting rod, one end of the connecting rod is provided with a rotating block for rotating a switch knob, the other end of the connecting rod is provided with toggle teeth, the rotating block is arranged in the water tank, the rotating block is provided with a clamping groove capable of clamping the switch knob, and the toggle tooth fixing seat, the connecting rod and the rotating block jointly form a rotating device of the switch knob;
the rack transmission device comprises a rack transmission cylinder and a rack, and the rack and the poking teeth can be mutually matched and meshed, so that the rack can drive the poking teeth to rotate when moving left and right;
the valve pulling device comprises a pulling cylinder, a valve pulling fixing rod, magnetic absorption blocks and a connecting plate, wherein the valve pulling fixing rod is fixedly arranged on the machine body, the pulling cylinder is arranged on the valve pulling fixing rod, the connecting plate is arranged at the tail end of the pulling cylinder, the magnetic absorption blocks are arranged on the connecting plate at equal intervals, and the positions of the magnetic absorption blocks are respectively arranged corresponding to the positions of the pulling switch during detection;
the self-closing valve air-tight device comprises a fixed plate for fixing the self-closing valve, a base, a bottom plate, a fixed air pipe, a lifting air cylinder for lifting and descending the fixed plate, and a pressing air cylinder for descending the fixed air pipe to enable the fixed air pipe to be tightly connected with an air inlet pipe, wherein the lifting air cylinder is arranged at the top of the machine body, the fixed plate is vertically connected with the bottom plate, the base is fixed on the bottom plate, arranging grooves for placing the self-closing valve are equidistantly distributed on the fixed plate, magnets are arranged on two sides of the arranging grooves, a central shaft of the arranging grooves corresponds to a central shaft of the base, an air channel for detection is arranged in the base, a sealing ring is arranged at the end of the air channel on the base, the air channel is matched and communicated with a ball valve, an air outlet is arranged on, the automatic closing valve is characterized in that a branch pipe is arranged on the vent pipe b, the tail end of the branch pipe is arranged in water in the water tank, a valve b is arranged on the branch pipe, an air inlet connecting pipe of the automatic closing valve is connected with a fixed air pipe in a matched mode, and one side of the fixed air pipe is communicated with a vent pipe a.
2. The automatic airtightness detection device for the pipeline gas self-closing valve, as claimed in claim 1, is characterized in that: the self-closing valve air-tight device and the pushing cylinder are provided with two, and a pressing cylinder is correspondingly arranged on each fixed air pipe.
3. The automatic airtightness detection device for the pipeline gas self-closing valve, as claimed in claim 1, is characterized in that: the rack-type automatic pushing device is characterized in that a plurality of sliding rails are arranged on the workbench at equal intervals, the rack is arranged on the pushing bottom plate, one side of the pushing bottom plate is connected with the pushing cylinder, the pushing bottom plate is arranged on the sliding rails and can move back and forth along the sliding rails, the rack transmission cylinder is arranged on the pushing bottom plate, and the pushing cylinder can enable the pushing bottom plate to move back and forth when in work.
4. The automatic airtightness detection device for the pipeline gas self-closing valve, as claimed in claim 1, is characterized in that: the vent pipe a and the vent pipe b are rubber hoses.
5. The automatic airtightness detection device for the pipeline gas self-closing valve, as claimed in claim 1, is characterized in that: the fixed air pipe is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910733576.1A CN112304514A (en) | 2019-08-01 | 2019-08-01 | Automatic gas tightness detection device for pipeline gas self-closing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910733576.1A CN112304514A (en) | 2019-08-01 | 2019-08-01 | Automatic gas tightness detection device for pipeline gas self-closing valve |
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| Publication Number | Publication Date |
|---|---|
| CN112304514A true CN112304514A (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910733576.1A Pending CN112304514A (en) | 2019-08-01 | 2019-08-01 | Automatic gas tightness detection device for pipeline gas self-closing valve |
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| Country | Link |
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| CN (1) | CN112304514A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125144A (en) * | 2021-04-07 | 2021-07-16 | 成都特恩达燃气设备有限公司 | Self-closing valve test system and test device |
| CN117804692A (en) * | 2024-02-28 | 2024-04-02 | 常州敏航驱动科技有限公司 | Automobile electric water valve test bed |
-
2019
- 2019-08-01 CN CN201910733576.1A patent/CN112304514A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125144A (en) * | 2021-04-07 | 2021-07-16 | 成都特恩达燃气设备有限公司 | Self-closing valve test system and test device |
| CN117804692A (en) * | 2024-02-28 | 2024-04-02 | 常州敏航驱动科技有限公司 | Automobile electric water valve test bed |
| CN117804692B (en) * | 2024-02-28 | 2024-05-03 | 常州敏航驱动科技有限公司 | Automobile electric water valve test bed |
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