CN111735578A - Safety valve air tightness test tool and test method - Google Patents
Safety valve air tightness test tool and test method Download PDFInfo
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- CN111735578A CN111735578A CN202010786369.5A CN202010786369A CN111735578A CN 111735578 A CN111735578 A CN 111735578A CN 202010786369 A CN202010786369 A CN 202010786369A CN 111735578 A CN111735578 A CN 111735578A
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- half section
- safety valve
- disc
- clamping
- shaped pipe
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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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- Examining Or Testing Airtightness (AREA)
Abstract
The invention provides a safety valve air tightness test tool and a safety valve air tightness test method, wherein the safety valve is provided with a U-shaped pipe, the air tightness test tool comprises a clamping component, a jacking disc and a pipe connecting nozzle, the clamping component clamps the left half section of the U-shaped pipe, and one side of the clamping component, which is close to the right half section of the U-shaped pipe, is provided with a horizontal clamping groove; the jacking disc is provided with a threaded nozzle protruding upwards, the jacking disc is sleeved at the opening of the right half section of the U-shaped pipe through the threaded nozzle, two ends of the jacking disc are respectively provided with a long side and a short side which are horizontal, the long side can be embedded into the clamping groove, and a gap is formed between the short side and the clamping groove; the lower end of the filler neck is locked on the threaded neck of the jacking disc in a threaded mode, and the upper end of the filler neck is provided with an inner hole in sealed butt joint with the right half section opening of the U-shaped pipe. According to the safety valve air tightness test tool and the safety valve air tightness test method, the left half section of the U-shaped pipe of the valve is fixed through the clamping component, and the sealing and clamping are realized by combining the matching of the jacking disc and the pipe connecting nozzle with the right half section of the U-shaped pipe.
Description
Technical Field
The invention belongs to the technical field of air tightness tests, and particularly relates to an air tightness test tool and an air tightness test method for a safety valve.
Background
The safety valve is widely applied to a fluid pipeline system, is a safety pressure relief protection device, automatically releases a medium outwards to enable the pressure to return to a normal value after the medium pressure exceeds a specified value, and then is automatically closed. The safety valve is required to be introduced with gas with certain pressure to test the air tightness in the debugging and acceptance testing processes, whether the valve is qualified is judged, the safety valve is usually provided with bent pipes, particularly bent pipes without threads and thin walls, in the process, because the bent pipes are irregular in shape, the existing test tool is difficult to seal, the air leakage phenomenon frequently occurs, the test efficiency is low, the tightness is ensured, the bent pipes are not deformed, a plurality of factors are required to be considered, and the sealing difficulty of the bent pipes without threads is high. The existing tool directly clamps and seals the elbow, so that the wall of the elbow is easily deformed and even scrapped, meanwhile, the sealing effect is poor, the clamping is inconvenient, and the valve is easily scratched.
Disclosure of Invention
Based on the above problems, the invention aims to provide a safety valve airtightness test tool and a test method.
In order to achieve the above purpose, the invention adopts the technical scheme that: a safety valve air tightness test tool is provided with a U-shaped pipe and comprises a clamping component, a jacking disc and a pipe connecting nozzle, wherein the clamping component clamps the left half section of the U-shaped pipe, and a horizontal clamping groove is formed in one side, close to the right half section of the U-shaped pipe, of the clamping component; the jacking disc is provided with a threaded nozzle protruding upwards, the jacking disc is sleeved at the opening of the right half section of the U-shaped pipe through the threaded nozzle, two ends of the jacking disc are respectively provided with a long side and a short side which are horizontal, the long side can be embedded into the clamping groove, and a gap is formed between the short side and the clamping groove; the lower end of the filler neck is locked on the threaded neck of the jacking disc in a threaded mode, and the upper end of the filler neck is provided with an inner hole in sealed butt joint with the right half section opening of the U-shaped pipe.
The invention provides a safety valve air tightness test tool, and a method for using the safety valve air tightness test tool for an air tightness test comprises the following steps:
and 3, after the air tightness detection is finished, sequentially detaching the filler neck, the jacking disc and the clamping member, and repeating the operation of the steps 1 and 2 after replacing the next safety valve.
Specifically, in the step 2, the opening of the left half section of the U-shaped pipe of the safety valve is connected with an air source, the filler neck is connected with the hose, the port of the hose is immersed in the liquid, the U-shaped pipe is ventilated through the air source, and bubbles in the liquid are observed to judge whether the safety valve is qualified; or, in the step 2, the opening of the left half section of the U-shaped pipe of the safety valve is connected with the hose, the filler neck is connected with the air source, the port of the hose is immersed in the liquid, the U-shaped pipe is ventilated through the air source, and bubbles in the liquid are observed to judge whether the safety valve is qualified.
Optimally, the threaded nozzle of the jacking disc is provided with external threads, the lower end of the filler neck is provided with an internal threaded hole matched with the threaded nozzle, the size of an inner hole of the filler neck is smaller than the size of the opening of the right half section of the U-shaped pipe, and the end wall of the inner hole is provided with a sealing ring matched with the opening of the right half section of the U-shaped pipe; when the filler neck is screwed to be loose, the opening of the right half section of the U-shaped pipe extends out of the threaded nozzle of the clamping disc; when the filler neck is screwed to be locked, the inner hole of the filler neck is in sealed butt joint with the right half section opening of the U-shaped pipe.
Optimized, the tight dish in top is a semicircle disk body of cutting one section minor arc section, the screw thread mouth sets up in the point department of disk body, and wherein, the major arc section of disk body is the long limit, and the one end of cutting the minor arc section is the minor edge.
As another optimization, the jacking disc is an oval disc body, the threaded nozzle is arranged at one focus of the disc body, one end of the disc body, far away from the threaded nozzle, is a long edge, and one end, close to the threaded nozzle, is a short edge.
Preferably, the clamping component comprises a left clamping block and a right clamping block, clamping grooves matched with the shape of the left half section of the U-shaped pipe are respectively formed in the butt joint working faces of the left clamping block and the right clamping block, horizontal grooves with the same height are respectively formed in one sides, close to the right half section of the U-shaped pipe, of the left clamping block and the right clamping block, and when the left clamping block and the right clamping block are clamped, the two horizontal grooves are in butt joint to form a clamping groove; wherein, set up on the left clamp splice and extend to the fastening shaft that passes right clamp splice, the tip of fastening shaft sets up axle tail screw thread, through screwing up nut and axle tail screw thread fit with pressing from both sides left clamp splice and right clamp splice tightly.
Further preferably, the inner wall of the clamping groove of the left clamping block and the inner wall of the clamping groove of the right clamping block are provided with buffer layers, and the buffer layers are made of elastic materials, so that the valve is prevented from being damaged by clamping.
Preferably, the upper end of the filler pipe nozzle is provided with an external thread to be connected with an external air source system for air tightness detection.
The invention has the beneficial effects that:
according to the safety valve air tightness test tool and the test method, the left half section of the U-shaped pipe of the valve is fixed through the clamping component, and the sealing and clamping are realized by combining the abutting disc and the pipe connecting nozzle with the right half section of the U-shaped pipe, so that the operation is simple and convenient, the test efficiency is greatly improved, and the test air leakage rate is reduced.
Drawings
FIG. 1 is a schematic diagram of a safety valve airtightness test tool and a test method in the embodiment;
FIG. 2 is a side cross-sectional view of the left clamp block;
FIG. 3 is a schematic view of the butt joint of the filler neck and the tightening plate;
wherein, 1 is left clamp splice, 11 is the fastening shaft, 2 is right clamp splice, 3 is the filler neck, 31 is the hole, 4 is the tight dish in top, 41 is the long limit, 42 is the minor face, 43 is the nipple, 5 is the tightening nut, 6 is the sealing washer, 7 is the draw-in groove, 8 is the safety valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Examples
As shown in fig. 1, the embodiment provides an air-tight test tool for a safety valve, wherein a U-shaped tube is arranged on a safety valve 8, the air-tight test tool comprises a clamping member, a jacking disc 4 and a filler neck 3, the clamping member clamps a left half section of the U-shaped tube, and a horizontal clamping groove 7 is arranged on one side of the clamping member, which is close to a right half section of the U-shaped tube; the jacking disc 4 is a semicircular disc-shaped disc body with a section of minor arc section cut off, a thread nozzle 43 protruding upwards is arranged at a round point of the disc body, the jacking disc 4 is sleeved at the opening of the right half section of the U-shaped pipe through the thread nozzle 43, the major arc section of the disc body is a long side 41, one end with the minor arc section cut off is a short side 42, when the thread nozzle 43 of the jacking disc 4 is sleeved at the opening of the right half section of the U-shaped pipe, the long side 41 can be embedded into the clamping groove 7, and a gap is formed between the short side 42 and the clamping groove 7; the lower end of the filler neck 3 is locked on the threaded nozzle 43 of the jacking disc 4 in a threaded manner, and the filler neck 3 is provided with an inner hole 31 which is in sealed butt joint with the right half section opening of the U-shaped pipe;
the clamping component in the embodiment comprises a left clamping block 1 and a right clamping block 2, clamping grooves matched with the shape of the left half section of the U-shaped pipe are respectively arranged on the butt joint working faces of the left clamping block 1 and the right clamping block 2, and elastic buffer layers are arranged on the inner walls of the clamping grooves, wherein horizontal grooves with the same height are respectively arranged on one sides of the left clamping block 1 and the right clamping block 2, which are close to the right half section of the U-shaped pipe, when the left clamping block 1 and the right clamping block 2 are clamped, the two horizontal grooves are in butt joint to form a clamping groove 7, as shown in fig. 2, a fastening shaft 11 extending to penetrate through the right clamping block 2 is arranged on the left clamping block 1, a shaft tail thread is arranged at the end part of the fastening shaft 11, and the left clamping block 1 and the right clamping block 2 are clamped through the matching;
as shown in fig. 3, the nipple 43 of the tightening disc 4 is provided with an external thread, the lower end of the filler neck 3 is provided with an internal thread hole matched with the nipple 43, the size of the inner hole 31 of the filler neck 3 is smaller than the size of the opening of the right half section of the U-shaped pipe, and the end wall of the inner hole 31 is provided with a sealing ring 6 matched with the opening of the right half section of the U-shaped pipe; when the filler neck 31 is screwed to be loose, the opening of the right half section of the U-shaped pipe extends out of the threaded nozzle 43 of the clamping disc 4; when the filler neck 3 is screwed to be locked, the inner hole 31 of the filler neck 3 is in sealing butt joint with the right half section opening of the U-shaped pipe.
The method for performing the air tightness test by using the device comprises the following steps:
and 3, after the air tightness detection is finished, sequentially detaching the filler neck, jacking the disc 4, rotating the screwing nut 5 to loosen the left clamping block 1 and the right clamping block 2, and repeating the operation of the steps 1 and 2 after replacing the next safety valve 8.
According to the safety valve air-tight test tool and the test method, the left half section of the U-shaped pipe of the valve is fixed through the clamping component, the tight disc 4 and the pipe connecting nozzle are matched with the right half section of the U-shaped pipe to realize sealing and clamping, the operation is simple and convenient, the test efficiency is greatly improved, and the test air leakage rate is reduced.
The above examples of the present invention are merely illustrative of the present invention and are not intended to limit the embodiments of the present invention. Variations and modifications in other variations will occur to those skilled in the art upon reading the foregoing description. Not all embodiments are exhaustive. All obvious changes and modifications of the present invention are within the scope of the present invention.
Claims (10)
1. The safety valve air tightness test tool is characterized in that a U-shaped pipe is arranged on the safety valve, the air tightness test tool comprises a clamping component, a jacking disc and a pipe connecting nozzle, the clamping component clamps the left half section of the U-shaped pipe, and a horizontal clamping groove is formed in one side, close to the right half section of the U-shaped pipe, of the clamping component; the jacking disc is provided with a threaded nozzle protruding upwards, the jacking disc is sleeved at the opening of the right half section of the U-shaped pipe through the threaded nozzle, two ends of the jacking disc are respectively provided with a long side and a short side which are horizontal, the long side can be embedded into the clamping groove, and a gap is formed between the short side and the clamping groove; the lower end of the filler neck is locked on the threaded neck of the jacking disc in a threaded mode, and the upper end of the filler neck is provided with an inner hole in sealed butt joint with the right half section opening of the U-shaped pipe.
2. The safety valve airtightness test tool according to claim 1, wherein the nipple of the tightening disc is provided with external threads, the lower end of the nipple is provided with an internal thread hole matched with the nipple, the size of the inner hole of the nipple is smaller than the size of the opening of the right half section of the U-shaped pipe, and a sealing ring matched with the opening of the right half section of the U-shaped pipe is arranged on the end wall of the inner hole; when the filler neck is screwed to be loose, the opening of the right half section of the U-shaped pipe extends out of the threaded nozzle of the clamping disc; when the filler neck is screwed to be locked, the inner hole of the filler neck is in sealed butt joint with the right half section opening of the U-shaped pipe.
3. The safety valve airtightness test tool according to claim 1, wherein the tightening disc is a semicircular disc-shaped disc body with a minor arc section cut off, and the nipple is disposed at a round point of the disc body, wherein the major arc section of the disc body is a long side, and one end with the minor arc section cut off is a short side.
4. The safety valve airtightness test tool according to claim 1, wherein the tightening disc is an oval disc body, the threaded nozzle is disposed at a focal point of the disc body, one end of the disc body, which is far away from the threaded nozzle, is a long side, and one end, which is close to the threaded nozzle, is a short side.
5. The safety valve airtightness test tool according to claim 1, wherein the clamping member comprises a left clamping block and a right clamping block, clamping grooves adapted to the shape of the left half section of the U-shaped tube are respectively formed in the butt joint working faces of the left clamping block and the right clamping block, horizontal grooves with the same height are respectively formed in one sides of the left clamping block and the right clamping block, which are close to the right half section of the U-shaped tube, and when the left clamping block and the right clamping block are clamped, the two horizontal grooves are in butt joint to form a clamping groove; wherein, set up on the left clamp splice and extend to the fastening shaft that passes right clamp splice, the tip of fastening shaft sets up axle tail screw thread, through screwing up nut and axle tail screw thread fit with pressing from both sides left clamp splice and right clamp splice tightly.
6. The safety valve airtightness test tool according to claim 5, wherein buffer layers are arranged on inner walls of the clamping grooves of the left clamping block and the right clamping block, and the buffer layers are made of elastic materials.
7. The safety valve airtightness test tool according to claim 1, wherein an external thread is provided at an upper end of the filler neck to connect with an external air source system.
8. A method for carrying out an air tightness test by using the safety valve air tightness test tool of any one of claims 1 to 7 is characterized by comprising the following steps of:
step 1, clamping a left half section of a U-shaped pipe of a safety valve on a clamping component, sleeving a jacking disc at an opening of a right half section of the U-shaped pipe, rotating the jacking disc to enable a short side to be opposite to the clamping component, pressing the jacking disc downwards to enable a long side to be corresponding to a clamping groove of the clamping component, rotating the jacking disc to enable the long side to be embedded into the clamping groove, then sleeving a pipe connecting nozzle on a threaded nozzle, screwing the pipe connecting nozzle, pressing the opening of the right half section of the U-shaped pipe downwards by an inner hole end wall of the pipe connecting nozzle 3, and upwards jacking the pipe connecting nozzle and the jacking disc under the reaction force of the right half section of the U-shaped pipe due to the fact that the left half section is clamped, wherein the long side of the jacking disc is embedded into the clamping groove and is limited in vertical displacement, so that the jacking disc is jacked, and meanwhile;
step 2, carrying out air tightness detection;
and 3, after the air tightness detection is finished, sequentially detaching the filler neck, the jacking disc and the clamping member, and repeating the operation of the steps 1 and 2 after replacing the next safety valve.
9. The method for testing airtightness according to claim 8, wherein in step 2, the opening of the left half section of the U-shaped tube of the safety valve is connected to an air source, the filler neck is connected to the hose, the port of the hose is immersed in the liquid, the U-shaped tube is aerated by the air source, and bubbles in the liquid are observed to determine whether the safety valve is qualified.
10. The method for testing airtightness according to claim 8, wherein in step 2, the opening of the left half section of the U-shaped tube of the safety valve is connected to the hose, the filler neck is connected to the gas source, the port of the hose is immersed in the liquid, the U-shaped tube is ventilated through the gas source, and bubbles in the liquid are observed to determine whether the safety valve is qualified.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010786369.5A CN111735578B (en) | 2020-08-07 | 2020-08-07 | Safety valve air tightness test tool and test method |
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| CN202010786369.5A CN111735578B (en) | 2020-08-07 | 2020-08-07 | Safety valve air tightness test tool and test method |
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| CN111735578A true CN111735578A (en) | 2020-10-02 |
| CN111735578B CN111735578B (en) | 2020-11-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113252339A (en) * | 2021-06-11 | 2021-08-13 | 四川航天长征装备制造有限公司 | Damping type mechanical simulation steering engine |
| WO2024116748A1 (en) * | 2022-11-28 | 2024-06-06 | 三菱重工コンプレッサ株式会社 | Geared compressor |
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| CN113252339B (en) * | 2021-06-11 | 2021-10-01 | 四川航天长征装备制造有限公司 | Damping type mechanical simulation steering engine |
| WO2024116748A1 (en) * | 2022-11-28 | 2024-06-06 | 三菱重工コンプレッサ株式会社 | Geared compressor |
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| CN111735578B (en) | 2020-11-17 |
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