Valve airtightness detection tool and detection method thereof

Abstract

The invention provides a valve airtightness detection tool and a detection method thereof, and relates to the field of valve detection. A valve airtightness detection tool comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a fixed vertical plate, the upper surface of the fixed vertical plate is provided with a placement groove, the left side surface of the fixed vertical plate is provided with a groove communicated with the placement groove of the fixed vertical plate, and the placement groove of the fixed vertical plate is internally provided with a first rubber plate. A movable vertical plate is slidably connected to the upper surface of the bottom plate, a placement groove is formed in the upper surface of the movable vertical plate, a groove communicated with the placement groove of the movable vertical plate is formed in the right side surface of the movable vertical plate, and a second rubber plate is arranged in the placement groove of the movable vertical plate. The air blowing pump is used for pressurizing the interior of the valve body with the two ends sealed, and the pressure detection meter is used for measuring the air pressure in the valve body, so that the sealing performance of the valve body is determined, the valve body is prevented from making contact with water, and the flow of blow-drying the detected valve body is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of valve detection, in particular to a valve air tightness detection tool and a detection method thereof. Background Art

[0002] Air tightness testing is required during the production and processing of valves. The valves are tested by using the pre-use air tightness testing tool. The air tightness testing tool is also called an air tightness detector. The air tightness detector can detect the sealing effect of the test piece. The water or oil immersion visual bubble method is often used.

[0003] After the valve is tested by the air tightness detector in the water tank, it is necessary to blow the valve dry with an air gun to ensure that there is no large amount of residual water on the surface of the valve before entering the next process. The process is cumbersome and time-consuming. When applying for the present invention, the applicant found through search that a Chinese patent discloses a "valve air tightness test tool and detection method", and its application number is "202211369237.8". The patent mainly uses a motor to drive the valve body on the placement table to rotate at a uniform speed and use an air nozzle to evenly blow the valve body dry. Although the patent improves the efficiency of drying the moisture on the valve body in the specification, it still takes a certain amount of time. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a valve air tightness detection tool and a detection method thereof, which allows the valve body to avoid contact with water during air tightness detection, thereby reducing the process of blowing the valve body dry.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a valve air tightness detection tool, comprising a bottom plate, the upper surface of the bottom plate is fixedly connected to a fixed vertical plate, the upper surface of the fixed vertical plate is provided with a placement groove, the left surface of the fixed vertical plate is provided with a groove that penetrates the placement groove of the fixed vertical plate, a first rubber plate is provided in the placement groove of the fixed vertical plate, the upper surface of the bottom plate is slidably connected to a movable vertical plate, the upper surface of the movable vertical plate is provided with a placement groove, the right surface of the movable vertical plate is provided with a groove that penetrates the placement groove of the movable vertical plate, a second rubber plate is provided in the placement groove of the movable vertical plate, the second rubber plate is provided with a horizontally penetrating circular hole, the left side surface inside the placement groove of the movable vertical plate is provided with a through connecting hole, the left groove of the movable vertical plate is provided with a circular groove, the through connecting hole of the movable vertical plate and the circular groove The axial center lines of the grooves coincide with each other, the through-connecting hole of the movable vertical plate and the horizontal through-circular hole of the second rubber plate are connected, an air pump is fixed on the left side surface of the movable vertical plate, a first ventilation pipe is fixed on the inner cylindrical surface of the through-connecting hole of the movable vertical plate, the first ventilation pipe is fixedly connected to a first blocking valve away from the movable vertical plate, the first blocking valve is fixedly connected to a second ventilation pipe away from the first ventilation pipe, the other end of the second ventilation pipe is fixedly connected to the output end of the air pump, the upper surface of the bottom plate is fixedly connected to a first hydraulic cylinder, the top end of the piston rod of the first hydraulic cylinder is fixedly connected to the left side surface of the movable vertical plate, the cylindrical surface of the first ventilation pipe is fixedly connected to a first branch pipe, the first branch pipe is connected to the first ventilation pipe, the opening end of the first branch pipe is fixedly connected to a pressure detection gauge, a lifting mechanism is provided on the upper surface of the bottom plate, and the lifting mechanism is between the fixed vertical plate and the movable vertical plate. The first rubber plate is provided to facilitate sealing of one end of the valve body when the valve body is pressed against its surface; the second rubber plate is provided to facilitate sealing of the other end of the valve body; the air pump is provided to facilitate injecting gas into the valve body; the pressure detection gauge is provided to facilitate detection of the internal air pressure of the valve body and determination of the sealing performance of the valve body according to the change in its indication; the first hydraulic cylinder is provided to facilitate driving the movable vertical plate to move, thereby pressing the valve body between the first rubber plate and the second rubber plate; the lifting mechanism is provided to facilitate preliminary fixing of the valve body and adjustment of its position and height.

[0008] Preferably, a sealing ring is arranged in the circular groove on the left side surface of the movable vertical plate, the outer cylindrical surface of the sealing ring is in close contact with the cylindrical surface of the circular groove on the left side surface of the movable vertical plate, and the inner cylindrical surface of the sealing ring is in close contact with the outer cylindrical surface of the first ventilation pipe. The sealing ring is arranged to facilitate the sealing of the valve body during detection.

[0009] Preferably, the left surface of the movable vertical plate is fixedly connected to a pressure plate, the center of the pressure plate is through, the pressure plate is in contact with the sealing ring, and the first ventilation pipe passes through the center of the pressure plate. The pressure plate is provided to facilitate limiting the position of the sealing ring and prevent the sealing ring from being pushed out by a large air pressure.

[0010] Preferably, the cylindrical surface of the first ventilation pipe is fixedly connected to the second branch pipe, and the second branch pipe is connected to the interior of the first ventilation pipe.

[0011] Preferably, the second branch pipe is fixedly connected to the second blocking valve away from the first ventilation pipe, and the second blocking valve is fixedly connected to the air outlet pipe away from the second branch pipe.

[0012] Preferably, the lifting mechanism includes a sliding plate, a second hydraulic cylinder, a support plate, a lower V-block, an upper V-block, a connecting plate and a cylinder, the upper surface of the base plate is provided with a T-slot, the sliding plate is slidably connected to the upper surface of the base plate, and the bottom of the sliding plate is provided with a T-connecting block that fits in the T-slot.

[0013] Preferably, the second hydraulic cylinder is fixedly connected to the upper surface of the sliding plate, the support plate is fixedly connected to the upper end surface of the piston rod of the second hydraulic cylinder, and the lower V-block is fixedly connected to the upper surface of the support plate.

[0014] Preferably, the cylinder is fixedly connected to the upper surface of the support plate, the connecting plate is fixedly connected to the upper end surface of the piston rod of the cylinder, and the upper V-shaped block is fixedly connected to the lower surface of the connecting plate.

[0015] Preferably, a valve body is provided between the lower V-shaped block and the upper V-shaped block.

[0016] A method for testing a valve air tightness testing tool comprises the following steps:

[0017] S1. Place one end of the valve body on the lower V-block, then start the cylinder to drive the upper V-block downward to fix the valve body between the lower V-block and the upper V-block, then use the second hydraulic cylinder to drive the valve body up and down to make the hollow part of the valve body and the first vent pipe at the same height;

[0018] S2. Move the sliding plate to the right, driving the valve body to move to the right, until the opening at one end of the valve body contacts the left surface of the first rubber plate;

[0019] S3. The vertical plate is moved to the left by the first hydraulic cylinder until the right surface of the second rubber plate contacts the other end of the valve body and the valve body is pressed against the first rubber plate;

[0020] S4. Open the first barrier valve, then start the air pump to inflate the valve body, and after the pressure inside the valve body increases to a certain level, close the first barrier valve and turn off the air pump;

[0021] S5. Observe the changes in the pressure detection readings over a period of time to determine the leakage of the valve body;

[0022] S6. Open the second blocking valve to allow the gas inside the valve body to flow out from the outlet pipe, then drive the movable vertical plate back to its original position through the first hydraulic cylinder, drive the upper V-shaped block upward through the cylinder, release the fixation of the valve body, and then remove the valve body.

[0023] Working principle: The air pressure in the valve body is increased by sealing both ends of the valve body and injecting gas into the valve body. The first barrier valve and the second barrier valve are in a closed state. The air pressure in the valve body is tested by a pressure test gauge. The change in the pressure test number over a period of time is observed to determine the sealing performance of the valve body. During the whole process, the valve body does not come into contact with moisture, so there is no process of drying the valve body after testing.

[0024] (III) Beneficial effects

[0025] The present invention provides a valve air tightness detection tool and a detection method thereof, which have the following beneficial effects:

[0026] 1. Use an air pump to pressurize the inside of the valve body that is sealed at both ends, and use a pressure tester to measure the air pressure inside the valve body to determine the sealing of the valve body, avoiding contact between the valve body and moisture, thereby reducing the process of drying the valve body after testing.

[0027] 2. The discharge of high-pressure gas inside the valve body is controlled by the second barrier valve to avoid danger caused by high gas pressure inside the valve body when the valve body is removed.

[0028] 3. By setting up a lifting mechanism, the position of the valve body can be initially fixed, and its position and height can be adjusted afterwards. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall structure of a valve air tightness detection tool and a detection method thereof proposed by the present invention;

[0030] Figure 2 A schematic cross-sectional view of the matching position of the first vent pipe and the movable vertical plate of a valve air tightness detection tool and a detection method thereof proposed by the present invention;

[0031] Figure 3A schematic cross-sectional structure diagram of a movable vertical plate of a valve air tightness detection tool and a detection method thereof proposed by the present invention;

[0032] Figure 4 A schematic diagram of the structure of a lifting mechanism of a valve air tightness detection tool and a detection method thereof proposed by the present invention;

[0033] Figure 5 A second rubber plate parts diagram of a valve air tightness detection tool and a detection method thereof proposed by the present invention;

[0034] Figure 6 This is an enlarged view of the local structure at point A of a valve air tightness detection tool and a detection method thereof proposed in the present invention.

[0035] Among them, 1. bottom plate; 2. fixed vertical plate; 3. first rubber plate; 4. lifting mechanism; 5. valve body; 6. second rubber plate; 7. movable vertical plate; 8. first ventilation pipe; 9. first blocking valve; 10. second ventilation pipe; 11. air pump; 12. first hydraulic cylinder; 13. pressure plate; 14. sealing ring; 15. first branch pipe; 16. pressure detection gauge; 17. second branch pipe; 18. second blocking valve; 19. outlet pipe; 401. sliding plate; 402. second hydraulic cylinder; 403. support plate; 404. lower V-block; 405. upper V-block; 406. connecting plate; 407. cylinder. DETAILED DESCRIPTION

[0036] 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.

[0037] like Figure 1-6As shown, an embodiment of the present invention provides a valve air tightness detection tool, including a bottom plate 1, characterized in that: the upper surface of the bottom plate 1 is fixedly connected to the fixed vertical plate 2, the upper surface of the fixed vertical plate 2 is provided with a placement groove, the left surface of the fixed vertical plate 2 is provided with a groove that penetrates the placement groove of the fixed vertical plate 2, a first rubber plate 3 is provided in the placement groove of the fixed vertical plate 2, the upper surface of the bottom plate 1 is slidably connected to the movable vertical plate 7, the upper surface of the movable vertical plate 7 is provided with a placement groove, and the right surface of the movable vertical plate 7 is provided with a placement groove that penetrates the movable vertical plate 7 A through groove, a second rubber plate 6 is arranged in the placement groove of the movable vertical plate 7, the second rubber plate 6 is provided with a horizontal through circular hole, a through connecting hole is arranged on the left side surface of the placement groove of the movable vertical plate 7, a circular groove is arranged on the left groove of the movable vertical plate 7, the through connecting hole of the movable vertical plate 7 and the axial center line of the circular groove coincide, the through connecting hole of the movable vertical plate 7 and the horizontal through circular hole of the second rubber plate 6 are connected, an air pump 11 is fixed on the left side surface of the movable vertical plate 7, and the inner cylindrical part of the through connecting hole of the movable vertical plate 7 A first vent pipe 8 is fixed on the surface, and the first vent pipe 8 is fixedly connected to a first barrier valve 9 away from the movable vertical plate 7. The first barrier valve 9 is fixedly connected to a second vent pipe 10 away from the first vent pipe 8. The other end of the second vent pipe 10 is fixedly connected to the output end of the air pump 11. The upper surface of the bottom plate 1 is fixedly connected to a first hydraulic cylinder 12, and the top end of the piston rod of the first hydraulic cylinder 12 is fixedly connected to the left surface of the movable vertical plate 7. The cylindrical surface of the first vent pipe 8 is fixedly connected to a first branch pipe 15, and the first branch pipe 15 is communicated with the first vent pipe 8. The opening end of the first branch pipe 15 is fixedly connected to a pressure detection gauge 16. A lifting mechanism 4 is provided on the upper surface of the bottom plate 1, and the lifting mechanism 4 is between the fixed vertical plate 2 and the movable vertical plate 7. After long-term use, the first rubber plate 3 and the second rubber plate 6 will be damaged at the position where the surface is pressed, thereby affecting the sealing of the two ends of the valve body 5, so they need to be replaced frequently. During use, it is necessary to frequently use qualified valves to detect the sealing of the equipment itself. During the detection, the first barrier valve 9 is in a closed state.

[0038] A sealing ring 14 is provided in the circular groove on the left side surface of the movable vertical plate 7. The outer cylindrical surface of the sealing ring 14 is in close contact with the cylindrical surface of the circular groove on the left side surface of the movable vertical plate 7. The inner cylindrical surface of the sealing ring 14 is in close contact with the outer cylindrical surface of the first ventilation pipe 8. The left side surface of the movable vertical plate 7 is fixedly connected to a pressing plate 13. The center of the pressing plate 13 is through. The pressing plate 13 is in contact with the sealing ring 14. The first ventilation pipe 8 passes through the center of the pressing plate 13. The pressing plate 13 is fixed to the movable vertical plate 7 by screws.

[0039] The cylindrical surface of the first ventilation pipe 8 is fixedly connected to the second branch pipe 17, the second branch pipe 17 and the inside of the first ventilation pipe 8 are communicated, the second branch pipe 17 is fixedly connected to the second barrier valve 18 away from the first ventilation pipe 8, and the second barrier valve 18 is fixedly connected to the outlet pipe 19 away from the second branch pipe 17. During detection, the second barrier valve 18 is in a closed state. After the detection is completed, the second barrier valve 18 needs to be opened first to discharge the high-pressure gas inside the valve body 5.

[0040] The lifting mechanism 4 includes a sliding plate 401, a second hydraulic cylinder 402, a support plate 403, a lower V-block 404, an upper V-block 405, a connecting plate 406 and a cylinder 407. A T-slot is provided on the upper surface of the base plate 1. The sliding plate 401 is slidably connected to the upper surface of the base plate 1. A T-connecting block that fits in the T-slot is provided at the bottom of the sliding plate 401. The second hydraulic cylinder 402 is fixedly connected to the upper surface of the sliding plate 401. The support plate 403 is fixedly connected to the upper end surface of the piston rod of the second hydraulic cylinder 402. The lower V-block 404 is fixedly connected to the upper surface of the support plate 403.

[0041] The cylinder 407 is fixedly connected to the upper surface of the support plate 403, the connecting plate 406 is fixedly connected to the upper end surface of the piston rod of the cylinder 407, the upper V-shaped block 405 is fixedly connected to the lower surface of the connecting plate 406, and the valve body 5 is arranged between the lower V-shaped block 404 and the upper V-shaped block 405.

[0042] A method for testing a valve air tightness testing tool comprises the following steps:

[0043] S1. Place one end of the valve body 5 on the lower V-shaped block 404, then start the cylinder 407 to drive the upper V-shaped block 405 to move downward to fix the valve body 5 between the lower V-shaped block 404 and the upper V-shaped block 405, and then drive the valve body 5 to move up and down through the second hydraulic cylinder 402, so that the hollow part of the valve body 5 and the first ventilation pipe 8 are at the same height;

[0044] S2. Move the sliding plate 401 toward the right, driving the valve body 5 to move to the right, until the opening at one end of the valve body 5 contacts the left surface of the first rubber plate 3;

[0045] S3. The first hydraulic cylinder 12 drives the movable vertical plate 7 to move to the left until the right surface of the second rubber plate 6 contacts the other end of the valve body 5 and presses the valve body 5 against the first rubber plate 3;

[0046] S4. Open the first barrier valve 9, then start the air pump 11 to inflate the valve body 5, and after the pressure inside the valve body 5 increases to a certain level, close the first barrier valve 9 and turn off the air pump 11;

[0047] S5. Observe the changes in the pressure detection meter 16 for a period of time to determine the leakage of the valve body 5;

[0048] S6. Open the second barrier valve 18 to allow the gas inside the valve body 5 to flow out from the outlet pipe 9, and then drive the movable vertical plate 7 back to its original position through the first hydraulic cylinder 12, and drive the upper V-shaped block 405 upward through the cylinder 407 to release the fixation of the valve body 5, and then remove the valve body 5.

[0049] 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 valve air tightness detection tool, comprising a base plate (1), characterized in that: The upper surface of the bottom plate (1) is fixedly connected to the fixed vertical plate (2), the upper surface of the fixed vertical plate (2) is provided with a placement groove, the left surface of the fixed vertical plate (2) is provided with a groove that is connected to the placement groove of the fixed vertical plate (2), and the placement groove of the fixed vertical plate (2) is provided with a first rubber plate (3), the upper surface of the bottom plate (1) is slidably connected to the movable vertical plate (7), the upper surface of the movable vertical plate (7) is provided with a placement groove, and the right surface of the movable vertical plate (7) is provided with a groove that is connected to the movable vertical plate (7). The placement groove of the movable vertical plate (7) is provided with a second rubber plate (6), the second rubber plate (6) is provided with a horizontally through circular hole, the placement groove of the movable vertical plate (7) is provided with a through connection hole on the left side surface inside, the left groove of the movable vertical plate (7) is provided with a circular groove, the through connection hole of the movable vertical plate (7) and the axial center line of the circular groove coincide, the through connection hole of the movable vertical plate (7) and the horizontal through circular hole of the second rubber plate (6) are connected The left surface of the movable vertical plate (7) is fixed with an air pump (11); the inner cylindrical surface of the through-connecting hole of the movable vertical plate (7) is fixed with a first ventilation pipe (8); the first ventilation pipe (8) is fixedly connected to a first blocking valve (9) away from the movable vertical plate (7); the first blocking valve (9) is fixedly connected to a second ventilation pipe (10) away from the first ventilation pipe (8); the other end of the second ventilation pipe (10) is fixedly connected to the output end of the air pump (11); the upper surface of the bottom plate (1) is fixedly connected to the first ventilation pipe (11); A hydraulic cylinder (12), the top end of the piston rod of the first hydraulic cylinder (12) is fixedly connected to the left surface of the movable vertical plate (7), the cylindrical surface of the first ventilation pipe (8) is fixedly connected to the first branch pipe (15), the first branch pipe (15) and the first ventilation pipe (8) are in communication, the open end of the first branch pipe (15) is fixedly connected to a pressure detection gauge (16), and a lifting mechanism (4) is arranged on the upper surface of the bottom plate (1), and the lifting mechanism (4) is between the fixed vertical plate (2) and the movable vertical plate (7).

2. A valve air tightness detection tool according to claim 1, characterized in that: A sealing ring (14) is arranged in the circular groove on the left side surface of the movable vertical plate (7), the outer cylindrical surface of the sealing ring (14) is in close contact with the cylindrical surface of the circular groove on the left side surface of the movable vertical plate (7), and the inner cylindrical surface of the sealing ring (14) is in close contact with the outer cylindrical surface of the first ventilation pipe (8).

3. A valve air tightness detection tool according to claim 2, characterized in that: The left surface of the movable vertical plate (7) is fixedly connected to a pressing plate (13), the center of the pressing plate (13) is through, the pressing plate (13) is in contact with a sealing ring (14), and the first ventilation pipe (8) passes through the center of the pressing plate (13).

4. The valve air tightness detection tool according to claim 1, characterized in that: The cylindrical surface of the first ventilation pipe (8) is fixedly connected to the second branch pipe (17), and the second branch pipe (17) and the interior of the first ventilation pipe (8) are connected.

5. The valve air tightness detection tool according to claim 4, characterized in that: The second branch pipe (17) is fixedly connected to the second blocking valve (18) away from the first ventilation pipe (8), and the second blocking valve (18) is fixedly connected to the air outlet pipe (19) away from the second branch pipe (17).

6. The valve air tightness detection tool according to claim 1, characterized in that: The lifting mechanism (4) comprises a sliding plate (401), a second hydraulic cylinder (402), a supporting plate (403), a lower V-shaped block (404), an upper V-shaped block (405), a connecting plate (406) and a cylinder (407); a T-shaped groove is arranged on the upper surface of the base plate (1); the sliding plate (401) is slidably connected to the upper surface of the base plate (1); and a T-shaped connecting block matched in the T-shaped groove is arranged at the bottom of the sliding plate (401).

7. The valve air tightness detection tool according to claim 6, characterized in that: The second hydraulic cylinder (402) is fixedly connected to the upper surface of the sliding plate (401), the support plate (403) is fixedly connected to the upper end surface of the piston rod of the second hydraulic cylinder (402), and the lower V-shaped block (404) is fixedly connected to the upper surface of the support plate (403).

8. The valve air tightness detection tool according to claim 6, characterized in that: The cylinder (407) is fixedly connected to the upper surface of the support plate (403), the connecting plate (406) is fixedly connected to the upper end surface of the piston rod of the cylinder (407), and the upper V-shaped block (405) is fixedly connected to the lower surface of the connecting plate (406).

9. The valve air tightness detection tool according to claim 6, characterized in that: A valve body (5) is arranged between the lower V-shaped block (404) and the upper V-shaped block (405).

10. A detection method according to a valve air tightness detection tool as claimed in any one of claims 1 to 9, characterized in that: The following steps are included: S1. Place one end of the valve body (5) on the lower V-shaped block (404), then start the cylinder (407) to drive the upper V-shaped block (405) to move downward to fix the valve body (5) between the lower V-shaped block (404) and the upper V-shaped block (405), then drive the valve body (5) to move up and down through the second hydraulic cylinder (402) so that the hollow part of the valve body (5) and the first ventilation pipe (8) are at the same height; S2. Move the sliding plate (401) toward the right, driving the valve body (5) to move to the right, until the opening at one end of the valve body (5) contacts the left surface of the first rubber plate (3); S3. The first hydraulic cylinder (12) drives the movable vertical plate (7) to move to the left until the right side surface of the second rubber plate (6) contacts the other end of the valve body (5) and presses the valve body (5) against the first rubber plate (3); S4. Open the first barrier valve (9), then start the air pump (11) to inflate the valve body (5), and after the pressure inside the valve body (5) increases to a certain level, close the first barrier valve (9) and turn off the air pump (11); S5. Observe the changes in the pressure detection meter (16) over a period of time to determine the leakage of the valve body (5); S6. Open the second blocking valve (18) to allow the gas inside the valve body (5) to flow out from the gas outlet pipe (9), then drive the movable vertical plate (7) back to its original position through the first hydraulic cylinder (12), and drive the upper V-shaped block (405) upward through the cylinder (407), thereby releasing the fixation of the valve body (5), and then remove the valve body (5).

Images