Relay valve sealing performance testing device

Abstract

The utility model discloses a relay valve sealing performance test device, relates to the relay valve sealing technology field, and comprises a pedestal, a test box and a first air cylinder, the top end of the pedestal is provided with the first air cylinder and a second air cylinder, and the input end of the first air cylinder and the input end of the second air cylinder are respectively provided with a first stop valve and a third stop valve. One end of the first air storage cylinder and one end of the second air storage cylinder are each provided with a first air pressure meter, a second stop valve is arranged at the output end of the first air storage cylinder, a test box is arranged at the top end of the base, a positioning frame is installed at the top end of the test box, and a relay valve body is arranged in the positioning frame; the device is provided with a test box bottom end drain pipe which is used for draining water into a water tank, an operator can pull a pull rod outwards, so that the pull rod drives a spring to stretch outwards, the pull rod is further separated from the outer wall of a mounting block, quick disassembly is met, and a next group of relay valves can be conveniently tested.

Description

TECHNICAL FIELD

[0001] The utility model relates to relay valve sealing technical field, concretely is a relay valve sealing performance test device. BACKGROUND

[0002] The relay valve inlet is connected with the air cylinder, and the outlet is connected with the brake air chamber. When the brake pedal is stepped on, the output air pressure of the brake valve is input as the control pressure of the relay valve, which is pushed away under the action of the control pressure, so that compressed air directly enters the brake air chamber through the inlet without flowing through the brake valve, which greatly shortens the charging pipeline of the brake air chamber and accelerates the charging process of the air chamber. Therefore, the relay valve is also called an acceleration valve.

[0003] However, the existing relay valve sealing performance test device has the following problems in use: the traditional relay valve adopts flow production during production, the test detection time is limited, the existing installation time is long, the test time is long, and the sealing test efficiency is low. UTILITY MODEL CONTENTS

[0004] The utility model discloses a relay valve sealing performance test device to solve the relevant problems in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a relay valve sealing performance test device, including base, test box and first air cylinder, the top of base is provided with first air cylinder and second air cylinder, and the input of first air cylinder and second air cylinder is provided with first stop valve and third stop valve respectively, one end of first air cylinder and second air cylinder is provided with first air pressure gauge respectively, the output of first air cylinder is provided with second stop valve, the top of base is provided with test box, and the top of test box is installed with positioning frame, and the inside of positioning frame is provided with relay valve body, one side of relay valve body is provided with inlet, and the top end close to inlet of relay valve body is provided with control gas port, the side, away from first air pressure gauge of second stop valve, is installed with second connecting pipe, the output of second air cylinder is provided with first connecting pipe, and the outer wall of first connecting pipe and second connecting pipe is installed with external flange, the inside of inlet and control gas port is provided with quick -wearing mechanism for sealing installation.

[0006] The utility model discloses a relay valve sealing performance test device, the top of base is provided with water tank, the top of base is provided with water pump, and the input of water pump is provided with the second delivery pipe of penetrating water tank, and the output of water pump is provided with the first delivery pipe of penetrating test box.

[0007] The technical solution provides a relay valve sealing performance testing device, wherein the quick-connect mechanism includes a sealing gasket and an arc-shaped sealing block. The air inlet and the control air inlet are provided with sealing gaskets. An installation block is installed on one side of the external flange, which passes through the air inlet and the control air inlet respectively, and an arc-shaped sealing block adapted to the sealing gasket is installed on the outer wall of the installation block.

[0008] The technical solution provides a relay valve sealing performance testing device, wherein the air inlet and control air inlet are provided with movable grooves, and a tie rod is provided inside the movable groove, which penetrates the external flange. A spring is sleeved on the outer wall of the tie rod, and the outer wall of the spring is in contact with the inner wall of the movable groove.

[0009] The technical solution provides a relay valve sealing performance testing device, wherein a second pressure gauge is installed inside both the air inlet and the control air inlet.

[0010] The technical solution provides a relay valve sealing performance testing device, wherein a sealing piston block is installed on the outer wall of the pull rod and is in close contact with the inner wall of the movable groove.

[0011] The technical solution provides a relay valve sealing performance testing device, wherein the bottom of the test chamber is provided with a drain pipe that penetrates the inside of the water tank.

[0012] Compared with the prior art, this utility model provides a relay valve sealing performance testing device, which has the following beneficial effects:

[0013] 1. This utility model uses a water pump to drive the soapy water in the water tank to the test chamber through the second and first delivery pipes, facilitating soap solution inspection. If a leak occurs at the control air port or air inlet, the second pressure gauge can be observed. If the measured sealing index is not greater than 20 kPa, the leak is detected. The soapy water is then drained back into the water tank through the drain pipe, thus achieving cyclic use. This structure is simple to operate and convenient to test.

[0014] 2. This utility model discharges water into the water tank through the drain pipe at the bottom of the test chamber. The operator can pull the pull rod outward, which in turn causes the spring to stretch outward, thus separating the pull rod from the outer wall of the mounting block. Then, the position of the relay valve body is moved to the opposite side to facilitate quick disassembly and make it convenient for the next set of relay valves to be tested. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front sectional view of the present invention;

[0016] Figure 2 This is a top view of the structure of this utility model;

[0017] Figure 3 For the present utility model Figure 1 A magnified structural diagram at point A;

[0018] Figure 4 This is a schematic diagram of the main structure of this utility model.

[0019] In the diagram: 1. Base; 2. Test chamber; 3. First air storage cylinder; 4. First shut-off valve; 5. First pressure gauge; 6. Pull rod; 7. First connecting pipe; 8. Second connecting pipe; 9. Water tank; 10. Water pump; 11. First delivery pipe; 12. Second delivery pipe; 13. Positioning frame; 14. Relay valve body; 15. Air inlet; 16. Control air inlet; 17. External flange; 18. Mounting block; 19. Sealing gasket; 20. Arc-shaped sealing block; 21. Movable groove; 22. Spring; 23. Second shut-off valve; 24. Second air storage cylinder; 25. Third shut-off valve; 26. Second pressure gauge. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1, such as Figures 1-2 As shown, this utility model provides a technical solution: a relay valve sealing performance testing device, including a base 1, a test chamber 2, and a first air storage cylinder 3. The top of the base 1 is provided with a first air storage cylinder 3 and a second air storage cylinder 24, and the input ends of the first air storage cylinder 3 and the second air storage cylinder 24 are respectively provided with a first shut-off valve 4 and a third shut-off valve 25. A first pressure gauge 5 is provided at one end of the first air storage cylinder 3 and the second air storage cylinder 24, and a second shut-off valve 23 is provided at the output end of the first air storage cylinder 3. The top of the base 1 is provided with the test chamber 2, and the top of the test chamber 2 is equipped with a positioning frame 13, with a relay valve body 14 inside the positioning frame 13. The top of the base 1 is provided with a water tank 9 and a water pump 10. The water pump 10 has a second delivery pipe 12 that penetrates the water tank 9 at its input end. The air inlet 15 and the control air inlet 16 are both equipped with second pressure gauges 26. The water pump 10 has a first delivery pipe 11 that penetrates the test chamber 2 at its output end. The test chamber 2 has a drain pipe that penetrates the water tank 9 at its bottom end. When the water pump 10 is started, the position is driven by the second delivery pipe 12 and the first delivery pipe 11, so that the soap water in the water tank 9 is delivered to the test chamber 2 by the water pump 10, which is convenient for soap liquid inspection. When leakage occurs at the control air inlet 16 and the air inlet 15, the second pressure gauge 26 can be observed. If the measured sealing index is not greater than 20 kPa, the leakage is detected. The soap water is then drained back into the water tank 9 through the drain pipe, which can meet the requirements for recycling.

[0022] Example 2, as Figures 1-4 As shown, this utility model provides a technical solution: a relay valve sealing performance testing device, including an air inlet 15 on one side of a relay valve body 14, a control air port 16 at the top of the relay valve body 14 near the air inlet 15, a second connecting pipe 8 installed on the side of a second shut-off valve 23 away from the first pressure gauge 5, a first connecting pipe 7 at the output end of a second air storage cylinder 24, and an external flange 17 installed on the outer wall of the first connecting pipe 7 and the second connecting pipe 8. A quick-connect mechanism for sealing installation is provided inside the air inlet 15 and the control air port 16. The quick-connect mechanism includes a sealing gasket 19 and an arc-shaped sealing block 20. The sealing gasket 19 is provided inside the air inlet 15 and the control air port 16. An installation block 18 is installed on one side of the external flange 17, penetrating the air inlet 15 and the control air port 16 respectively, and an arc-shaped sealing block 18 is installed on the outer wall of the installation block 18 to match the sealing gasket 19. The sealing block 20, the air inlet 15, and the control air inlet 16 are provided with movable grooves 21. A pull rod 6 that passes through the external flange 17 is provided inside the movable groove 21. A spring 22 is sleeved on the outer wall of the pull rod 6, and the outer wall of the spring 22 is in contact with the inner wall of the movable groove 21. A sealing piston block that is in close contact with the inner wall of the movable groove 21 is installed on the outer wall of the pull rod 6. The relay valve body 14 is placed above the positioning frame 13. Then, the control air inlet 16 is aligned with the position of the second connecting pipe 8, so that the position of the first connecting pipe 7 is aligned with the position of the air inlet 15. The external flange 17 on the positions of the first connecting pipe 7 and the second connecting pipe 8 is inserted into the positions of the control air inlet 16 and the air inlet 15. The mounting block 18 at the external flange 17 squeezes the pull rod 6, so that the spring 22 is compressed. The sealing gasket 19 at the mounting block 18 is attached to the outer wall of the arc-shaped sealing block 20, which facilitates quick installation and removal.

[0023] Working principle: First, connect the external power supply, start the air source, connect the third shut-off valve 25, and input air pressure less than or equal to 784KPa into the air inlet 15. Then, by closing the first pressure gauge 5, check the air inlet 15 with soap solution. If the second pressure gauge 26 can be observed, and if the measured sealing index is not greater than 10KPa, then the leak is detected.

[0024] Connect the first shut-off valve 4 and the second shut-off valve 23, pass through the second pressure gauge 26, and input air pressure into the control air port 16. Deliver air pressure less than or equal to 784 kPa into the control air port 16, close the second shut-off valve 23, and then start the water pump 10 to drive through the second delivery pipe 12 and the first delivery pipe 11. Soap water in the water tank 9 is delivered to the test chamber 2 by the water pump 10 for easy soap solution inspection. If a leak occurs at the control air port 16, and the second pressure gauge 26 can be observed, if the measured sealing index is not greater than 20 kPa, then the leak is detected.

[0025] When the detection is completed, the drain pipe at the bottom end of the test box 2 can be opened to drain into the water tank 9, and the operator can pull the pull rod 6 outward, so that the pull rod 6 drives the spring 22 to stretch outward, and then the pull rod 6 is separated from the outer wall of the mounting block 18, and then the position of the relay valve body 14 is moved to the opposite side, so that the quick disassembly is satisfied, and the next group of relay valves are convenient for testing.

[0026] Finally, it should be noted that the above content is only used to illustrate the technical solutions of the present application, and is not a limitation on the scope of protection of the present application. Simple modifications or equivalent replacements of the technical solutions of the present application by those skilled in the art do not deviate from the essence and scope of the technical solutions of the present application.

Claims

1. A relay valve sealing performance test device, comprising a base (1), a test box (2) and a first gas cylinder (3), characterized in that: The top of the base (1) is provided with a first cylinder (3) and a second cylinder (24), and the input ends of the first cylinder (3) and the second cylinder (24) are provided with a first stop valve (4) and a third stop valve (25) respectively, one end of the first cylinder (3) and the second cylinder (24) is provided with a first pressure gauge (5), the output end of the first cylinder (3) is provided with a second stop valve (23), the top of the base (1) is provided with a test box (2), and the top of the test box (2) is provided with a positioning frame (13), and the inside of the positioning frame (13) is provided with a relay valve body (14), one side of the relay valve body (14) is provided with an air inlet (15), the top of the relay valve body (14) close to the air inlet (15) is provided with a control air port (16), the side of the second stop valve (23) away from the first pressure gauge (5) is provided with a second connecting pipe (8), the output end of the second cylinder (24) is provided with a first connecting pipe (7), and the outer wall of the first connecting pipe (7) and the second connecting pipe (8) is provided with an external flange (17), the inside of the air inlet (15) and the control air port (16) is provided with a quick connecting mechanism for sealing installation.

2. The device for testing the sealing performance of a relay valve according to claim 1, characterized in that: The top of the base (1) is provided with a water tank (9), the top of the base (1) is provided with a water pump (10), and the input end of the water pump (10) is provided with a second conveying pipe (12) penetrating through the water tank (9), and the output end of the water pump (10) is provided with a first conveying pipe (11) penetrating through the test box (2).

3. The device of claim 1, wherein: The quick connecting mechanism comprises a sealing gasket (19) and an arc-shaped sealing block (20), the inside of the air inlet (15) and the control air port (16) is provided with a sealing gasket (19), one side of the external flange (17) is provided with a mounting block (18) penetrating through the air inlet (15) and the control air port (16) respectively, and the outer wall of the mounting block (18) is provided with an arc-shaped sealing block (20) matched with the sealing gasket (19).

4. A sealing performance test device for a relay valve according to claim 3, characterized in that: The inside of the air inlet (15) and the control air port (16) is provided with a movable groove (21), and the inside of the movable groove (21) is provided with a pull rod (6) penetrating through the external flange (17), the outer wall of the pull rod (6) is provided with a spring (22), and the outer wall of the spring (22) is matched with the inner wall of the movable groove (21).

5. A device for testing the sealing performance of a relay valve according to claim 4, characterized in that: The outer wall of the pull rod (6) is provided with a sealing piston block tightly matched with the inner wall of the movable groove (21).

6. The device of claim 1, wherein: The inside of the air inlet (15) and the control air port (16) is provided with a second pressure gauge (26).

7. The device of claim 1, wherein: The bottom of the test box (2) is provided with a drain pipe penetrating through the inside of the water tank (9).

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