A leak detection device for a reciprocating compressor gas valve

Abstract

The present invention provides a leakage detection device for a reciprocating compressor air valve, which relates to the technical field of sealing test. The leakage detection device body comprises a boosting cavity, a secondary detection cavity and a main detection cavity. A boosting mechanism is inserted at the top of the boosting cavity, an electric heating wire is embedded on the inner wall of the boosting cavity, the air valve body to be tested is pressed against the bottom of the boosting cavity, the secondary detection cavity is sleeved on the side of the air valve body to be tested, and a sealing ring is integrally formed at the edge of the secondary detection cavity. The leakage detection device can timely detect leakage problems in the leakage detection device itself through the two detection cavities, so as to avoid the interference of the air tightness state change of the device itself on the detection result of the air valve to be tested. The positioning detection mechanism at the bottom can more accurately determine the specific leakage area of ​​the air valve, so that the final detection result is more accurate, and an additional verification and detection function is provided in the top boosting mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of sealing test, in particular to a leakage detection device for a reciprocating compressor air valve. Background Art

[0002] The air valve of a reciprocating compressor is an important part of the compressor. The airtight performance index of the air valve of a reciprocating compressor can ensure its normal operation. Through the detection and maintenance measures of the air valve by the leak detection device after the production is completed, the normal operation of the reciprocating compressor during subsequent installation and use can be effectively guaranteed, the failure rate can be reduced, the service life can be extended, and the reliability and economy of the overall equipment can be improved.

[0003] In the prior art, the leak detection device used for the reciprocating compressor valve is directly sealed and connected to the two sides of the reciprocating compressor valve through a pipeline, and a high-pressure airflow is introduced from the air outlet. The pressure modules in the front and rear pipelines are used to detect whether the air pressure passes through the valve to determine whether there is a leakage. However, due to the presence of multiple pore structures in the reciprocating compressor valve, this solution can only determine whether there is a leakage, but cannot accurately determine the specific location of the leakage in the valve. Therefore, it cannot provide effective airtightness status information in the early production and processing process. On the other hand, the conventional leak detection device is also prone to leakage after long-term use. Therefore, the change of its own airtightness status will also reduce the reliability of the detection result of the valve to be tested. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a leakage detection device for a reciprocating compressor air valve to solve the problems raised in the above-mentioned background technology. The present invention sets up two detection cavities, which can detect in time when the leakage detection device itself has a leakage problem, thereby avoiding the interference of the air tightness state change of the device itself on the detection result of the air valve to be tested. In conjunction with the positioning detection mechanism at the bottom, the specific leakage area of ​​the air valve can be determined more accurately, making the final detection result more accurate, and providing an additional verification and detection function in the top boosting mechanism.

[0005] In order to achieve the above-mentioned purpose, the present invention is realized by the following technical scheme: a leak detection device for a reciprocating compressor air valve, comprising a leak detection device body and a valve body to be tested, the leak detection device body comprising a boosting cavity, a secondary detection cavity and a main detection cavity, the top of the boosting cavity is inserted with a boosting mechanism, the inner wall of the boosting cavity is embedded with an electric heating wire, the valve body to be tested is pressed against the bottom of the boosting cavity, the secondary detection cavity is sleeved on the side of the valve body to be tested, and a sealing ring is integrally formed at the edge of the secondary detection cavity, the main detection cavity is against the bottom end of the valve body to be tested, the inner wall of the main detection cavity is screwed with a second temperature sensing module, the interior of the secondary detection cavity is screwed with a first temperature sensing module, and a positioning detection mechanism is inserted in the middle of the main detection cavity, the positioning detection mechanism comprises an outer layer docking component and an inner layer docking component, the top end of the outer layer docking component is against the bottom surface of the valve body to be tested, and the end of the inner layer docking component is embedded with a third temperature sensing module.

[0006] Furthermore, a fixing frame is welded on the inner wall of the boost cavity, a lifting sleeve is integrally formed in the middle of the fixing frame, an observation sleeve is integrally formed on the top of the lifting sleeve, and a spring is inserted inside the observation sleeve.

[0007] Furthermore, a top plate is provided on the surface of the lifting sleeve, a pressing sleeve is welded to the bottom of the top plate, a piston plate is welded to the bottom of the pressing sleeve, and an airbag is bonded to the connection between the pressing sleeve and the piston plate, and the top of the airbag is attached to the top of the inner wall of the pressurization cavity.

[0008] Furthermore, a pressing plate is sleeved on the surface of the lifting sleeve, a lever is welded on the side of the pressing plate, and the center of the pressing plate is connected to the surface of the lifting sleeve by a threaded connection. A lifting column is inserted inside the lifting sleeve, and end plates are integrally formed at both ends of the lifting column.

[0009] Furthermore, the side of the end plate fits with the inner wall of the lifting sleeve, the bottom of the lifting sleeve is open, and the interior of the lifting sleeve is connected to the internal space of the pressurized cavity, and a light-transmitting plate is embedded on the surface of the observation sleeve.

[0010] Furthermore, the outer docking assembly includes a rotating disk and an outer sleeve, the rotating disk is welded to the top of the outer sleeve, an internal thread structure is provided on the inner wall of the outer sleeve, a connecting hole is opened on the surface of the rotating disk, and a gap is provided between the surface of the rotating disk and the bottom surface of the gas valve body to be tested.

[0011] Furthermore, a positioning bin is welded on the surface of the rotating disk, a partition is integrally formed inside the positioning bin, and a plurality of guide pipes are plugged into the bottom of the positioning bin, and the bottom end of each guide pipe is embedded in the interior of the outer casing.

[0012] Furthermore, the bottom end of the outer sleeve passes downward from the middle position of the bottom of the main detection cavity, and a first hand wheel is welded to the end of the outer sleeve. A retaining ring is integrally formed on the side of the rotating disk, and the rotating disk is embedded in the inner wall of the main detection cavity through the retaining ring.

[0013] Furthermore, the inner layer docking assembly includes an inner layer sleeve and a docking sleeve, a second hand wheel is welded to the bottom of the inner layer sleeve, the docking sleeve is integrally formed at the top of the inner layer sleeve, and a threaded column is welded to the top of the docking sleeve.

[0014] Furthermore, a docking hole is provided on the side of the docking sleeve, and the interior of the docking sleeve and the inner sleeve are both hollow structures. The third temperature sensing module is embedded in the bottom end of the inner wall of the inner sleeve, and the bottom end of the surface of the inner sleeve is engraved with scale lines. The threaded column is screwed into the internal thread area of ​​the inner wall of the outer sleeve, and the docking hole is used to connect to the bottom end of any one of the diversion pipes.

[0015] Beneficial effects of the present invention:

[0016] 1. The reciprocating compressor air valve leak detection device is provided with two detection cavities, so that the joint position between the boosting cavity, the main detection cavity and the air valve body to be tested can be connected with the auxiliary detection cavity. Therefore, when the leak detection device itself has a leakage problem, it can be detected in time to avoid the interference of the air tightness state change of the device itself on the detection result of the air valve to be tested.

[0017] 2. After the reciprocating compressor air valve leak detection device detects that the air valve body to be tested has a leak, it cooperates with the bottom positioning detection mechanism to rotate and respectively connects the top positioning bin with different areas of the bottom of the air valve body to be tested, so as to more accurately determine the specific leakage area of ​​the air valve, making the final detection result more accurate.

[0018] 3. The reciprocating compressor air valve leak detection device increases the internal pressure of the boost cavity through the top boost mechanism, and determines whether the air flow is leaking by heating it in conjunction with the bottom temperature sensing module. Therefore, this solution can reduce the sealing requirements for the bottom positioning detection mechanism and provide additional verification and detection functions in the top boost mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the appearance of a leakage detection device for a reciprocating compressor gas valve of the present invention;

[0020] Figure 2 It is an internal cross-sectional view of a leakage detection device for a reciprocating compressor gas valve of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the boosting mechanism part of the present invention;

[0022] Figure 4 It is a side sectional view of the boosting mechanism part of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the positioning detection mechanism part of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the inner layer docking assembly part of the present invention;

[0025] Figure 7 for Figure 2 A magnified image of area A;

[0026] In the figure: 1, pressurization cavity; 2, auxiliary detection cavity; 3, main detection cavity; 4, pressurization mechanism; 5, positioning detection mechanism; 6, sealing ring; 7, outer layer docking assembly; 8, inner layer docking assembly; 9, electric heating wire; 10, valve body to be tested; 11, first temperature sensing module; 12, second temperature sensing module; 13, third temperature sensing module; 14, top plate; 15, pressing sleeve; 16, airbag; 17, piston plate; 18, lifting sleeve; 19, observation 1. Inspection sleeve; 20. Press plate; 21. Push rod; 22. Lifting column; 23. End plate; 24. Fixed frame; 25. Spring; 26. Rotating disk; 27. Snap ring; 28. Positioning bin; 29. ​​Partition; 30. Outer sleeve; 31. First hand wheel; 32. Diversion pipe; 33. Inner sleeve; 34. Second hand wheel; 35. Scale line; 36. Docking sleeve; 37. Docking hole; 38. Threaded column; 39. Internal thread; 40. Connecting hole. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] See also Figures 1 to 7The present invention provides the following technical solutions: a leak detection device for a reciprocating compressor gas valve, comprising a leak detection device body and a gas valve body 10 to be tested, the leak detection device body comprising a boosting cavity 1, a secondary detection cavity 2 and a main detection cavity 3, a boosting mechanism 4 is inserted at the top of the boosting cavity 1, an electric heating wire 9 is embedded on the inner wall of the boosting cavity 1, the gas valve body 10 to be tested is pressed on the bottom of the boosting cavity 1, the secondary detection cavity 2 is sleeved on the side of the gas valve body 10 to be tested, and a sealing ring 6 is integrally formed at the edge of the secondary detection cavity 2, the main detection cavity 3 is against the gas valve body 1 to be tested 0, a second temperature sensing module 12 is screwed on the inner wall of the main detection cavity 3, a first temperature sensing module 11 is screwed inside the auxiliary detection cavity 2, a positioning detection mechanism 5 is inserted in the middle of the main detection cavity 3, the positioning detection mechanism 5 includes an outer docking component 7 and an inner docking component 8, the top end of the outer docking component 7 is against the bottom surface of the gas valve body 10 to be tested, and the end of the inner docking component 8 is embedded with a third temperature sensing module 13. The reciprocating compressor gas valve leak detection device is used to detect whether there is a leak in the gas valve body 10 to be tested and the specific area of ​​the leak.

[0029] When the present invention is used, the gas valve body 10 to be tested is directly placed in the boosting cavity 1 and the main detection cavity 3. After the docking ring at the edge of the auxiliary detection cavity 2 is used to lock the connection, the gas valve body 10 to be tested can be directly clamped. Subsequently, the boosting mechanism 4 at the top is manually controlled to move downward to increase the pressure inside the boosting cavity 1, and the electric heating wire 9 is synchronously started to heat the high-pressure airflow inside the boosting cavity 1. After standing for a period of time, the first temperature sensing module 11 and the second temperature sensing module 12 are observed to see whether the temperature rises. If the third temperature sensing module 13 heats up, the bottom positioning detection mechanism 5 is manually controlled to achieve the purpose of accurately detecting the bottom area of ​​the gas valve body 10 to be tested. In the present invention, by setting two detection cavities, the joint position between the boosting cavity 1, the main detection cavity 3 and the gas valve body 10 to be tested can be connected to the auxiliary detection cavity 2. Therefore, when the leak detection device itself has a leakage problem, it can be detected in time to avoid the interference of the airtight state change of the device itself on the detection result of the gas valve to be tested.

[0030] In this embodiment, a fixing frame 24 is welded on the inner wall of the boost cavity 1, and a lifting sleeve 18 is integrally formed in the middle of the fixing frame 24, and an observation sleeve 19 is integrally formed on the top of the lifting sleeve 18, and a spring 25 is inserted inside the observation sleeve 19. The surface of the lifting sleeve 18 is sleeved with a top plate 14, and a pressing sleeve 15 is welded on the bottom of the top plate 14, and a piston plate 17 is welded on the bottom of the pressing sleeve 15, and an air bag 16 is bonded at the connection between the pressing sleeve 15 and the piston plate 17, and the top of the air bag 16 is attached to the top of the inner wall of the boost cavity 1. The surface of the lifting sleeve 18 is also sleeved with a pressing plate 20, and a lever 21 is welded on the side of the pressing plate 20, and the center of the pressing plate 20 is connected to the surface of the lifting sleeve 18 by threads, and a lifting column 22 is inserted inside the lifting sleeve 18, and end plates 23 are integrally formed at both ends of the lifting column 22. The side of the end plate 23 is in contact with the inner wall of the lifting sleeve 18, the bottom of the lifting sleeve 18 is open, and the interior of the lifting sleeve 18 is connected to the internal space of the pressurized cavity 1, and a light-transmitting plate is embedded on the surface of the observation sleeve 19. The internal pressure of the pressurized cavity 1 is increased by the top pressurizing mechanism 4, and the bottom temperature sensing module is used to determine whether the airflow is leaking by heating. Therefore, this solution can reduce the sealing requirements for the bottom positioning detection mechanism 5 and provide an additional verification and detection function in the top pressurizing mechanism 4.

[0031] Specifically, by manually rotating the lever 21 and driving the pressing plate 20 to rotate, the pressing plate 20 can be pressed down by cooperating with the lifting sleeve 18 in the center of the pressing plate 20, exerting downward pressure on the top plate 14, and then moving the pressing sleeve 15 downward, so that the airbag 16 at the bottom is deployed, and the piston plate 17 at the end moves downward, finally increasing the pressure inside the boost cavity 1. After releasing the lever 21, the pressure inside the boost cavity 1 will always remain in this state. Subsequently, by observing whether the first temperature sensing module 11 has a temperature rise phenomenon, it can be determined whether the heated high-pressure airflow inside the boost cavity 1 has penetrated from the edge of the gas valve body 10 to be tested into the auxiliary detection cavity 2, thereby determining whether there is a leakage problem between the device and the edge of the gas valve body 10 to be tested. If the first temperature sensing module 11 has not detected a temperature increase, the subsequent second temperature sensing module 12 and the third temperature sensing module 13 can be further observed to determine whether the gas valve body 10 to be tested has a leakage.

[0032] At the same time, no matter there is a leak in the gas valve body 10 to be tested or there is a leak in the connection between the device and the gas valve body 10 to be tested, the pressure inside the pressurized cavity 1 will decrease, thereby causing the lifting column 22 and the end plate 23 to move downward. Therefore, the descent of the top end plate 23 can be directly observed from the top observation sleeve 19, and this process provides an additional leakage detection purpose.

[0033] In this embodiment, the outer layer docking assembly 7 includes a rotating disk 26 and an outer layer sleeve 30. The rotating disk 26 is welded to the top of the outer layer sleeve 30. The inner wall of the outer layer sleeve 30 is provided with an internal thread 39 structure. A connecting hole 40 is opened on the surface of the rotating disk 26, and a gap is provided between the surface of the rotating disk 26 and the bottom surface of the gas valve body 10 to be tested. A positioning chamber 28 is also welded on the surface of the rotating disk 26. A partition 29 is integrally formed inside the positioning chamber 28, and a plurality of guide pipes 32 are plugged into the bottom of the positioning chamber 28. The bottom end of each guide pipe 32 is embedded in the inner part of the outer layer sleeve 30. The bottom end of the outer layer sleeve 30 passes downward from the middle position of the bottom of the main detection cavity 3, and a first hand wheel 31 is welded to the end of the outer layer sleeve 30. A snap ring 27 is integrally formed on the side of the rotating disk 26, and the rotating disk 26 is embedded in the inner wall of the main detection cavity 3 through the snap ring 27.

[0034] Specifically, if the temperatures of the second temperature sensing module 12 and the third temperature sensing module 13 remain unchanged, it means that the high-temperature and high-pressure airflow inside the boost cavity 1 has not passed through the gas valve body 10 to be tested, and therefore the gas valve body 10 to be tested is in a non-leaking state. If the second temperature sensing module 12 generates a temperature increase, the first hand wheel 31 can be manually turned to drive the top positioning bin 28 to rotate with the help of the outer sleeve 30 and the rotating disk 26, thereby changing the position of the positioning bin 28 and the bottom of the gas valve body 10 to be tested. This process continues until the second temperature sensing module 12 detects that the temperature is no longer there, which means that the area of ​​the gas valve body 10 to be tested that the positioning bin 28 is in contact with is the specific area where leakage has occurred.

[0035] In this embodiment, the inner layer docking assembly 8 includes an inner layer sleeve 33 and a docking sleeve 36. A second hand wheel 34 is welded to the bottom of the inner layer sleeve 33. The docking sleeve 36 is integrally formed at the top of the inner layer sleeve 33. A threaded column 38 is welded to the top of the docking sleeve 36. A docking hole 37 is provided on the side of the docking sleeve 36. The interior of the docking sleeve 36 and the inner layer sleeve 33 are both hollow structures. The third temperature sensing module 13 is embedded in the bottom end of the inner wall of the inner layer sleeve 33. The bottom end of the surface of the inner layer sleeve 33 is engraved with a scale line 35. The threaded column 38 is screwed on the inner thread 39 area of ​​the inner wall of the outer layer sleeve 30. The docking hole 37 is used to connect with the bottom end of any one of the diversion pipes 32. After detecting leakage in the gas valve body 10 to be tested, the positioning detection mechanism 5 at the bottom is rotated to respectively dock the top positioning bin 28 with different areas at the bottom of the gas valve body 10 to be tested, so that the specific leakage area of ​​the gas valve can be more accurately determined, making the final detection result more accurate.

[0036] Specifically, after the leakage area contacted by the positioning bin 28 is located through the outer docking assembly 7, the second hand wheel 34 is manually controlled to rotate, and the inner sleeve 33 can be rotated, and then the top threaded column 38 is matched with the internal thread 39 structure to change the bottom rotating disk 26 to rotate, so that the docking hole 37 on the rotating disk 26 is aligned with the bottom of each guide pipe 32 in turn. At this time, through the change of the alignment position, the corresponding area of ​​the gas valve body 10 to be tested in the area separated by the partition 29 in the positioning bin 28 can be connected with the inner sleeve 33 in turn. Therefore, the leakage area detected in the positioning bin 28 can be further accurately limited to a more precise area, and finally detailed leakage data can be obtained.

[0037] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A leak detection device for a reciprocating compressor gas valve, comprising a leak detection device body and a gas valve body to be tested (10), characterized in that: The leak detection device body comprises a pressurizing cavity (1), an auxiliary detection cavity (2) and a main detection cavity (3); a pressurizing mechanism (4) is inserted at the top of the pressurizing cavity (1); an electric heating wire (9) is embedded on the inner wall of the pressurizing cavity (1); the gas valve body (10) to be tested is pressed against the bottom of the pressurizing cavity (1); the auxiliary detection cavity (2) is sleeved on the side of the gas valve body (10) to be tested; and a sealing ring (6) is integrally formed at the edge of the auxiliary detection cavity (2); the main detection cavity (3) is pressed against the bottom end of the gas valve body (10) to be tested; a second temperature sensing module (12) is screwed on the inner wall of the main detection cavity (3); and a first temperature sensing module (12) is screwed inside the auxiliary detection cavity (2). 11), a positioning detection mechanism (5) is inserted in the middle of the main detection cavity (3), the positioning detection mechanism (5) comprises an outer docking component (7) and an inner docking component (8), the top end of the outer docking component (7) is against the bottom surface of the gas valve body (10) to be tested, and the end of the inner docking component (8) is embedded with a third temperature sensing module (13), the outer docking component (7) comprises a rotating disk (26) and an outer sleeve (30), the rotating disk (26) is welded to the top of the outer sleeve (30), the inner wall of the outer sleeve (30) is provided with an internal thread (39), the surface of the rotating disk (26) is provided with a connecting hole (40), and the surface of the rotating disk (26) is in contact with the gas valve body to be tested. A gap is provided between the bottom surfaces of the main detection cavity (10), a positioning chamber (28) is welded to the surface of the rotating disk (26), a partition (29) is integrally formed inside the positioning chamber (28), and a plurality of guide pipes (32) are plugged into the bottom of the positioning chamber (28), the bottom end of each guide pipe (32) is embedded in the interior of the outer sleeve (30), the bottom end of the outer sleeve (30) passes downward from the middle position of the bottom of the main detection cavity (3), and a first hand wheel (31) is welded to the end of the outer sleeve (30), a retaining ring (27) is integrally formed on the side of the rotating disk (26), and the rotating disk (26) is embedded in the inner wall of the main detection cavity (3) through the retaining ring (27), and the inner layer docking assembly The component (8) comprises an inner sleeve (33) and a docking sleeve (36), a second hand wheel (34) is welded to the bottom of the inner sleeve (33), the docking sleeve (36) is integrally formed at the top of the inner sleeve (33), a threaded column (38) is welded to the top of the docking sleeve (36), a docking hole (37) is provided on the side of the docking sleeve (36), the interior of the docking sleeve (36) and the inner sleeve (33) are both hollow structures, the third temperature sensing module (13) is embedded in the bottom end of the inner wall of the inner sleeve (33), the bottom end of the surface of the inner sleeve (33) is engraved with a scale line (35), and the threaded column (38) is screwed into the internal thread (39) area of ​​the inner wall of the outer sleeve (30),The docking hole (37) is used to connect to the bottom end of any one of the diversion pipes (32).

2. A reciprocating compressor air valve leak detection device according to claim 1, characterized in that: A fixing frame (24) is welded to the inner wall of the boost cavity (1), a lifting sleeve (18) is integrally formed in the middle of the fixing frame (24), an observation sleeve (19) is integrally formed at the top of the lifting sleeve (18), and a spring (25) is inserted into the interior of the observation sleeve (19).

3. A reciprocating compressor air valve leakage detection device according to claim 2, characterized in that: The surface of the lifting sleeve (18) is sleeved with a top plate (14), the bottom of the top plate (14) is welded with a pressing sleeve (15), the bottom of the pressing sleeve (15) is welded with a piston plate (17), and an airbag (16) is bonded to the connection between the pressing sleeve (15) and the piston plate (17), and the top of the airbag (16) is attached to the top of the inner wall of the pressurizing cavity (1).

4. A reciprocating compressor air valve leakage detection device according to claim 3, characterized in that: The surface of the lifting sleeve (18) is also sleeved with a pressing plate (20), a lever (21) is welded to the side of the pressing plate (20), and the center of the pressing plate (20) is connected to the surface of the lifting sleeve (18) via a threaded connection. A lifting column (22) is inserted into the interior of the lifting sleeve (18), and end plates (23) are integrally formed at both ends of the lifting column (22).

5. A reciprocating compressor air valve leakage detection device according to claim 4, characterized in that: The side edge of the end plate (23) is in contact with the inner wall of the lifting sleeve (18), the bottom of the lifting sleeve (18) is in an open state, and the interior of the lifting sleeve (18) is connected to the internal space of the pressurized cavity (1), and a light-transmitting plate is embedded on the surface of the observation sleeve (19).

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