A test device for EGR valve production capable of electrical sealing detection

Abstract

The present invention discloses a test device for the production of an EGR valve capable of electrically detecting a seal, comprising a horizontally placed support base, a clamping table fixedly installed in the middle position of the upper surface of the support base, a valve body to be detected is placed above the clamping table, a terminal for connecting the power supply of the valve body is fixedly installed on the front side of the upper surface of the support base, a clamping rod is installed above the clamping table, and a sliding structure is formed between the lower end of the clamping rod and an electric slide groove provided on the upper surface of the clamping table, a blow box and a detection box are fixedly installed on the left and right sides of the upper surface of the support base, and an intake pipe for introducing carbon dioxide gas is fixedly installed on the side of the blow box. In the test device for the production of an EGR valve capable of electrically detecting a seal, a gas sensor is installed in the mounting sheet on the outer side of the first sealing cover, and the gas sensor is used to detect whether there is a leak at the connection between the first sealing cover and the valve body, thereby ensuring the accuracy of the detection.

Description

Technical Field

[0001] The invention relates to the technical field of valve testing, in particular to a testing device for EGR valve production capable of conducting electrical sealing detection. Background Art

[0002] The full name of the EGR valve is the exhaust gas recirculation valve. It is a device used to reduce automobile engine emissions. Its working principle is to guide part of the exhaust gas back to the engine's intake system, mix it with fresh air, and then re-enter the combustion chamber.

[0003] During the production process of the EGR valve, its sealing needs to be tested to avoid unqualified valves from affecting normal use due to leakage. When testing the EGR valve, it is necessary to ensure that the valve joints are completely sealed, otherwise the detected gas will leak from the joints and affect the accuracy of the test.

[0004] As in the prior art, a Chinese patent with publication number CN107843396B discloses a sealing valve sealing detection device, wherein a crossbeam is horizontally installed on the top surface of a column, an electric hydraulic push rod is slidably connected to a slide groove through a guide wheel, a sealing sleeve is fixedly installed on the bottom surface of the electric hydraulic push rod, the left end of the sealing sleeve is fixedly connected to a plastic air pipe, the left end top of the plastic air pipe is connected to a limited plastic ventilation pipe, a plastic ball is placed in the inner cavity of the limited plastic ventilation pipe, a sealing cover is installed on the top of the limited plastic ventilation pipe, and the right end surface of the sealing sleeve is connected to the air guide pipe.

[0005] As another example in the prior art, a Chinese patent with announcement number CN118243305A discloses a valve sealing test tool, in which two plugging components are respectively located at the two ends of the valve to be tested, one plugging component is fixed on a test bench, and the other plugging component is movably arranged on the test bench. One end of the telescopic device is connected to the other plugging component. By injecting air from one side of the valve core to the other side, the pressure difference on both sides of the valve core quickly reaches a preset value. After maintaining the pressure, the valve core is opened, and the air in the positive pressure area is automatically replenished to the negative pressure area without gas overflow, thereby greatly shortening the time required for the pressurization and pressure release process and improving the testing efficiency of the valve.

[0006] It can be seen from the above materials that in the prior art, a sealing sleeve or a blocking assembly is generally used to ensure the sealing of the connection between the test device and the valve. However, in actual use, there is no device for detecting air leakage at the connection position. Therefore, when the device ages after long-term use, it is impossible to determine whether there is air leakage at the connection position. Summary of the invention

[0007] The object of the present invention is to provide a test device for EGR valve production capable of electrically conducting sealing detection, so as to solve the problem in the above-mentioned background technology that leakage at the connection position cannot be detected.

[0008] To achieve the above object, the present invention provides the following technical solution: a test device for EGR valve production capable of electrically sealing detection, comprising a horizontally placed support base, a clamping table fixedly installed at the middle position of the upper surface of the support base, and a valve body to be detected is placed above the clamping table, and also includes:

[0009] A terminal for connecting the power supply of the valve body is fixedly installed on the front side of the upper surface of the support base, and a clamping rod is installed above the clamping platform, and a sliding structure is formed between the lower end of the clamping rod and the electric slide groove provided on the upper surface of the clamping platform;

[0010] An air blow box and a detection box are fixedly installed on the left and right sides of the upper surface of the support base, respectively; an air inlet pipe for introducing carbon dioxide gas is fixedly installed on the side of the air blow box, and an air outlet pipe is fixedly installed on the upper surface of the detection box;

[0011] A first sealing cover is arranged on the outside of the air box, a second sealing cover is arranged on the outside of the detection box, a telescopic cylinder is fixedly installed between the first sealing cover and the air box and between the second sealing cover and the detection box, a gas sensor for detecting carbon dioxide gas leakage is arranged on the outside of the first sealing cover, and a rotating mechanism for driving the gas sensor to rotate is arranged on the side of the first sealing cover;

[0012] A sealing airbag is fixedly mounted on the outside of the first sealing cover, and an inflation mechanism for inflating the sealing airbag is arranged inside the first sealing cover.

[0013] Preferably, a heater for heating carbon dioxide gas is fixedly installed inside the air blowing box, clean water is stored inside the detection box, and a high-definition camera for detecting bubble generation is fixedly installed on the inner wall of the detection box.

[0014] Preferably, the rotating mechanism comprises a mounting ring rotatably mounted on the outer surface of the first sealing cover and mounting plates fixedly mounted at equal intervals outside the mounting ring, and the gas sensor is fixedly mounted on the inner surface of the mounting plate.

[0015] Preferably, the outer surface of the mounting plate is provided with a driving blade fixedly mounted vertically therewith, and the position of the driving blade corresponds to the position of the air blowing nozzle, and the air blowing nozzle is fixedly mounted on the inner side of the clamping table.

[0016] Preferably, the blowing nozzle is connected to the storage air bag via a delivery pipe fixedly mounted on the side of the clamping platform, and the storage air bag is fixedly mounted on the inner wall of the air box.

[0017] Preferably, a vertically distributed blocking plate is provided inside the air box, and a reciprocating screw threadedly installed through the lower end of the blocking plate forms a sliding structure with the air box, and the position of the blocking plate corresponds to the position of the storage airbag.

[0018] Preferably, the interiors of the first sealing cover and the second sealing cover are both configured as hollow structures, and the outer surfaces of the first sealing cover and the second sealing cover are both provided with through holes.

[0019] Preferably, the first sealing cover is connected to the air box through a first connecting pipe fixedly installed on its side, and a delivery pump is provided at the front end of the first connecting pipe, and the second sealing cover is connected to the detection box through a second connecting pipe fixedly installed on its side.

[0020] Preferably, the inflation mechanism comprises a partition plate fixedly mounted inside the first sealing cover.

[0021] Preferably, an electric valve is fixedly installed on the inner side of the partition plate, and the electric valve controls the opening and closing of a pipeline connected to the partition plate.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: the EGR valve production test device capable of electrically sealing detection adopts a new structural design, and its specific contents are as follows:

[0023] 1. Use an air pump to transport the carbon dioxide gas in the air box to the inside of the valve body to test the sealing effect of the valve body. At this time, the valve body can be powered on and closed by the terminal. If there is a leak, the gas will enter the test box, causing bubbles to form in the clean water in the test box. The bubbles can be observed by a high-definition camera to determine whether there is a leak.

[0024] Furthermore, a gas sensor is installed in the installation sheet outside the first sealing cover, and the gas sensor is used to detect whether there is leakage at the connection between the first sealing cover and the valve body, thereby ensuring the accuracy of the detection;

[0025] Furthermore, a heater is fixedly installed inside the air box, and the heater is used to heat the carbon dioxide gas inside it to simulate the gas temperature of the normal use environment of the valve. At the same time, the transmission screw drives the blocking plate to slide left and right in the air box to speed up the heating of the gas. At the same time, the blocking plate is used to squeeze the storage air bag, so that the air in the storage air bag is ejected from the blowing nozzle through the delivery pipe. The airflow blown out by the blowing nozzle causes the driving blade to drive the mounting ring to rotate, and the mounting ring is used to drive the gas sensor to rotate slowly, thereby ensuring the comprehensiveness of the gas sensor detection.

[0026] 2. A sealing airbag is fixedly installed on the outside of the first sealing cover, and the elastic effect of the sealing airbag is used to improve the sealing effect when it contacts the valve body, thereby reducing the occurrence of air leakage;

[0027] Furthermore, a partition plate with an annular structure is fixed inside the first sealing cover to isolate the gas flow between the first sealing cover and the sealing airbag. When the sealing airbag suffers elastic fatigue after a long time, the electric valve on the inner side of the partition plate is opened to allow the gas inside the first sealing cover to enter the sealing airbag, thereby inflating the sealing airbag and ensuring the elastic sealing effect of the sealing airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the structure of the clamping table of the present invention;

[0030] Figure 3 This is a schematic structural diagram of the first sealing cover and the valve body in a combined state of the present invention;

[0031] Figure 4 This is a schematic diagram of the cross-sectional structure of the air box of the present invention;

[0032] Figure 5 It is a schematic diagram of the cross-sectional structure of the detection box of the present invention;

[0033] Figure 6 is a schematic diagram of the cross-sectional structure of the first sealing cover of the present invention;

[0034] Figure 7 For the present invention Figure 6 The enlarged structural diagram at A in the middle;

[0035] Figure 8 This is a schematic diagram of the mounting ring structure of the present invention;

[0036] Fig. 9 This is a schematic diagram of the structure of the baffle plate of the present invention;

[0037] Fig.10 It is a structural schematic diagram of the connection relationship between the blowing nozzle and the storage air bag of the present invention.

[0038] In the figure: 1. Support base; 101. Terminal block; 2. Clamping table; 3. Valve body; 4. Clamping rod; 5. Electric slide; 6. Drum box; 7. Detection box; 701. High-definition camera; 8. First sealing cover; 9. Second sealing cover; 10. Telescopic cylinder; 11. Mounting plate; 12. Gas sensor; 13. Mounting ring; 14. Driving blade; 15. Blowing nozzle; 16. Delivery pipe; 17. Storage air bag; 18. Blocking plate; 19. Reciprocating screw; 20. Heater; 21. Inlet pipe; 22. Outlet pipe; 23. First connecting pipe; 24. Delivery pump; 25. Second connecting pipe; 26. Through hole; 27. Sealing air bag; 28. Partition plate; 29. ​​Electric valve. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1: Please refer to Figure 1-Figure 5 In order to solve the problem that the traditional device cannot detect the gas leakage at the connection, the present embodiment provides the following technical solutions, using the gas sensor 12 to detect the gas leakage around the connection, specifically disclosed: a horizontally placed support base 1, a clamping platform 2 is fixedly installed in the middle position of the upper surface of the support base 1, and a valve body 3 to be detected is placed above the clamping platform 2, a terminal 101 for connecting the power supply of the valve body 3 is fixedly installed on the front side of the upper surface of the support base 1, and a clamping rod 4 is installed above the clamping platform 2, and a sliding structure is formed between the lower end of the clamping rod 4 and the electric slide 5 opened on the upper surface of the clamping platform 2, and a drum box 6 and a valve body 3 to be detected are fixedly installed on the left and right sides of the upper surface of the support base 1. An air inlet pipe 21 for introducing carbon dioxide gas is fixedly installed on the side of the detection box 7 and the air blow box 6, and an air outlet pipe 22 is fixedly installed on the upper surface of the detection box 7, a first sealing cover 8 is arranged on the outside of the air blow box 6, and a second sealing cover 9 is arranged on the outside of the detection box 7, a telescopic cylinder 10 is fixedly installed between the first sealing cover 8 and the air blow box 6 and between the second sealing cover 9 and the detection box 7, a gas sensor 12 for detecting carbon dioxide gas leakage is arranged on the outside of the first sealing cover 8, a heater 20 for heating carbon dioxide gas is fixedly installed inside the air blow box 6, clean water is stored inside the detection box 7, and a high-definition camera 701 for detecting bubble generation is fixedly installed on the inner wall of the detection box 7.

[0041] When using the device, first place the valve body 3 to be tested on the clamping table 2, then the clamping rod 4 slides in the electric slide 5, so that the clamping rod 4 clamps and fixes the valve body 3, and after the fixation is completed, the connecting line of the valve body 3 is connected to the terminal 101 to realize the connection of the power supply. At this time, the staff can control the opening and closing of the valve body 3, and then open the telescopic cylinder 10, and use the telescopic cylinder 10 to push the first sealing cover 8 and the second sealing cover 9 to the position of the valve body 3, so that the first sealing cover 8 and the second sealing cover 9 are finally sealed to the valve body 3. After the sealing is completed, the delivery pump 24 is turned on, so that the delivery pump 24 delivers the carbon dioxide gas in the gas box 6 to the first sealing cover 8 through the first connecting pipe 23 (the gas box 6 is injected into the second sealing cover 8 through the intake pipe 21). Carbon dioxide is discharged from the first sealing cover 8 through the air outlet pipe 22 fixedly installed on its upper surface. During the detection process, the gas sensor 12 (used to detect carbon dioxide gas in the surrounding environment) on the outside of the first sealing cover 8 detects whether there is a leak at the connection with the valve body 3. If a leak is found, the staff can repair it in time.

[0042] Example 2: Please refer to Figure 8-Figure 10 In order to achieve a better effect of detecting air leakage, the present embodiment provides the following technical solution, which drives the gas sensor 12 to rotate so as to detect the air leakage at the connection more comprehensively. Specifically, the first sealing cover 8 is provided with a rotating mechanism for driving the gas sensor 12 to rotate, and the rotating mechanism includes a mounting ring 13 rotatably mounted on the outer surface of the first sealing cover 8 and a mounting sheet 11 fixedly mounted at equal intervals outside the mounting ring 13, and the gas sensor 12 is fixedly mounted on the inner surface of the mounting sheet 11, and the outer surface of the mounting sheet 11 is provided with a driving blade fixedly mounted vertically thereto. 14, and the position of the driving blade 14 corresponds to the position of the blowing nozzle 15, and the blowing nozzle 15 is fixedly installed on the inner side of the clamping table 2, the blowing nozzle 15 is connected to the storage air bag 17 through a conveying pipe 16 fixedly installed on the side of the clamping table 2, and the storage air bag 17 is fixedly installed on the inner wall of the blow box 6, and a vertically distributed blocking plate 18 is arranged inside the blow box 6, and the blocking plate 18 forms a sliding structure with the blow box 6 through a reciprocating screw rod 19 threadedly installed at its lower end, and the position of the blocking plate 18 corresponds to the position of the storage air bag 17.

[0043] During the test, the heater 20 is turned on according to the actual situation, and the heater 20 is used to heat the carbon dioxide gas in the air box 6, so as to simulate the temperature of the valve body 3 when working, so as to make the test more accurate. When the heater 20 is turned on, the motor above the support base 1 is turned on at the same time, and the reciprocating screw 19 is driven by the motor to rotate. During the rotation of the reciprocating screw 19, the blocking plate 18 installed with a thread through the outside thereof is driven to slide back and forth, and the movable blocking plate 18 is used to stir the gas in the air box 6, so as to speed up the heating speed. When the blocking plate 18 moves to the top, it will squeeze the storage air bag 17. When the storage air bag 17 is squeezed, the air inside is transported to the blowing nozzle 15 through the delivery pipe 16, and finally the air flow is ejected from the blowing nozzle 15, and the air flow is used to blow the driving blade 14, so that the driving blade 14 drives the mounting plate 11 and the mounting ring 13 to rotate. At this time, the gas sensor 12 can perform a comprehensive detection operation on the connection between the first sealing cover 8 and the valve body 3.

[0044] Example 3: Please refer to Figure 6-Figure 7 In order to solve the problem of poor sealing effect at the connection of the traditional device, the present embodiment provides the following technical solutions, which specifically disclose: a sealing airbag 27 is fixedly installed on the outside of the first sealing cover 8, and an inflation mechanism for inflating the sealing airbag 27 is arranged inside the first sealing cover 8, the first sealing cover 8 and the second sealing cover 9 are both arranged as hollow structures, and the outer surfaces of the first sealing cover 8 and the second sealing cover 9 are both provided with through holes 26, the first sealing cover 8 is connected to the air box 6 through a first connecting pipe 23 fixedly installed on its side, and a delivery pump 24 is arranged at the front end of the first connecting pipe 23, the second sealing cover 9 is connected to the detection box 7 through a second connecting pipe 25 fixedly installed on its side, and the inflation mechanism includes a partition plate 28 fixedly installed inside the first sealing cover 8, an electric valve 29 is fixedly installed on the inner side of the partition plate 28, and the electric valve 29 controls the opening and closing of the pipeline connected to the partition plate 28.

[0045] When the gas sensor 12 detects air leakage at the connection position between the first sealing cover 8 and the valve body 3 (which may be caused by elastic fatigue of the sealing airbag 27 over a long period of time), the electric valve 29 inside the first sealing cover 8 is opened to connect the inner and outer sides of the partition plate 28, so that the carbon dioxide gas introduced into the first sealing cover 8 can enter the sealing airbag 27 through the pipeline at the position of the electric valve 29, causing the sealing airbag 27 to expand, so that the outer surface of the sealing airbag 27 will be more closely attached to the inner wall of the valve body 3, achieving a better sealing effect. If the air leakage problem cannot be solved, the staff needs to carry out maintenance.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test device for producing an EGR valve capable of electrically conducting a sealing test, comprising a horizontally placed support base (1), a clamping platform (2) being fixedly mounted in the middle of the upper surface of the support base (1), and a valve body (3) to be tested being placed above the clamping platform (2), characterized in that: Also includes: A terminal (101) for connecting the power supply of the valve body (3) is fixedly mounted on the front side of the upper surface of the support base (1), and a clamping rod (4) is mounted above the clamping platform (2), and a sliding structure is formed between the lower end of the clamping rod (4) and an electric slide groove (5) provided on the upper surface of the clamping platform (2); An air blow box (6) and a detection box (7) are fixedly mounted on the left and right sides of the upper surface of the support base (1), an air inlet pipe (21) for introducing carbon dioxide gas is fixedly mounted on the side of the air blow box (6), and an air outlet pipe (22) is fixedly mounted on the upper surface of the detection box (7); A first sealing cover (8) is arranged on the outside of the gas box (6), a second sealing cover (9) is arranged on the outside of the detection box (7), a telescopic cylinder (10) is fixedly installed between the first sealing cover (8) and the gas box (6) and between the second sealing cover (9) and the detection box (7), a gas sensor (12) for detecting carbon dioxide gas leakage is arranged on the outside of the first sealing cover (8), and a rotating mechanism for driving the gas sensor (12) to rotate is arranged on the side of the first sealing cover (8); A sealing airbag (27) is fixedly mounted on the outside of the first sealing cover (8), and an inflation mechanism for inflating the sealing airbag (27) is provided inside the first sealing cover (8); The rotating mechanism comprises a mounting ring (13) rotatably mounted on the outer surface of the first sealing cover (8) and a mounting sheet (11) fixedly mounted at equal intervals outside the mounting ring (13), and the gas sensor (12) is fixedly mounted on the inner surface of the mounting sheet (11); The outer surface of the mounting plate (11) is provided with a driving blade (14) fixedly mounted vertically thereto, and the position of the driving blade (14) corresponds to the position of the air blowing nozzle (15), and the air blowing nozzle (15) is fixedly mounted on the inner side of the clamping table (2); The air blowing nozzle (15) is connected to the storage air bag (17) via a delivery pipe (16) fixedly mounted on the side of the clamping platform (2), and the storage air bag (17) is fixedly mounted on the inner wall of the air box (6); A vertically distributed blocking plate (18) is provided inside the air box (6), and a reciprocating screw rod (19) threadedly installed at the lower end of the blocking plate (18) is passed through to form a sliding structure with the air box (6), and the position of the blocking plate (18) corresponds to the position of the storage air bag (17).

2. The EGR valve production test device capable of electrical sealing detection according to claim 1, characterized in that: A heater (20) for heating carbon dioxide gas is fixedly installed inside the air blowing box (6), clean water is stored inside the detection box (7), and a high-definition camera (701) for detecting the generation of bubbles is fixedly installed on the inner wall of the detection box (7).

3. The EGR valve production test device capable of electrical sealing detection according to claim 1, characterized in that: The interior of the first sealing cover (8) and the second sealing cover (9) are both arranged as hollow structures, and the outer surfaces of the first sealing cover (8) and the second sealing cover (9) are both provided with through holes (26).

4. The EGR valve production test device capable of electrical sealing detection according to claim 3, characterized in that: The first sealing cover (8) is connected to the air box (6) via a first connecting pipe (23) fixedly mounted on the side thereof, and a delivery pump (24) is provided at the front end of the first connecting pipe (23). The second sealing cover (9) is connected to the detection box (7) via a second connecting pipe (25) fixedly mounted on the side thereof.

5. The EGR valve production test device capable of electrical sealing detection according to claim 1, characterized in that: The inflation mechanism comprises a partition plate (28) fixedly mounted inside the first sealing cover (8).

6. The EGR valve production test device capable of electrical sealing detection according to claim 5, characterized in that: An electric valve (29) is fixedly mounted on the inner side of the partition plate (28), and the electric valve (29) controls the opening and closing of a pipeline connected to the partition plate (28).

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