Sealing test device

Abstract

The utility model relates to a sealing performance testing device, which belongs to the technical field of testing devices and comprises a rack, a sealing device and a sealing device. The testing base is used for supporting a hollow testing piece, the testing base is arranged on the supporting bottom plate, and a pressure transmitter is arranged in the hollow testing piece; the water inlet pipe is communicated with the interior of the test base and is communicated with the water pump and the booster pump; the upper pressing and sealing assembly is arranged above the hollow test piece, the upper pressing and sealing assembly comprises an upper pressing plate used for sealing the top of the hollow test piece, the upper pressing plate is connected with a telescopic device, an upper through hole is formed in the upper pressing plate, and the upper through hole is communicated with a water outlet pipe. In addition, through mutual cooperation of the protrusion and the groove and the process of introducing water into the interior, the gap between the protrusion and the groove can be filled with water, the hollow test piece can be pushed upwards under the action of the pressure of the water, then the upper portion of the hollow test piece can be tightly attached, and the sealing performance is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of testing devices, in particular to a sealing test device. Background Art

[0002] In the prior art, when testing the sealing of a hollow tubular test piece, gas is generally introduced into the interior after the upper and lower plugs are clamped, and the sealing of the hollow tubular test piece is judged by judging the internal pressure change. However, the test device in the prior art may not be clamped tightly enough, thereby affecting the accuracy of the test. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the utility model provides a sealing test device to solve the problems raised in the background technology.

[0004] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a sealing test device, comprising:

[0005] A frame, the frame comprising a supporting base plate;

[0006] a test base for supporting a hollow test piece, the test base being arranged on the supporting base plate, and a pressure transmitter being arranged in the hollow test piece;

[0007] a water inlet pipe connected to the interior of the test base, wherein the water inlet pipe is connected to both the water pump and the booster pump;

[0008] An upper compression sealing assembly is arranged above the hollow test piece, and the upper compression sealing assembly includes an upper pressure plate for sealing the top of the hollow test piece. The upper pressure plate is connected to the telescopic device, and an upper through hole is provided in the upper pressure plate. The upper through hole is connected to the water outlet pipe, and a pneumatic valve is provided on the water outlet pipe.

[0009] Furthermore, the hollow test piece includes a lower flange at the bottom, and the test base includes an upper base plate fitted with the lower flange. The upper base plate is provided with a plurality of first grooves, and a first sealing ring is provided in the first groove.

[0010] Furthermore, the test base also includes a lower base plate, which is arranged below the upper base plate, and a groove is provided on the side of the lower base plate facing the upper base plate, and a protrusion is provided at the bottom of the upper base plate to cooperate with the groove, and a second groove is provided on the side wall of the protrusion, and a second sealing ring is provided in the second groove.

[0011] Furthermore, the upper base plate is provided with a through upper test through hole, the top of the upper test through hole is communicated with the inner cavity of the hollow test piece, and the bottom of the upper test through hole is communicated with the groove.

[0012] Furthermore, a penetrating lower test through hole is provided on the lower base plate, the top of the lower test through hole is communicated with the groove, and the bottom of the lower test through hole is communicated with the water inlet pipe.

[0013] Furthermore, the lower base plate is connected to the movable telescopic rod, and the supporting base plate is provided with a limiting opening groove that cooperates with the water inlet pipe, and the limiting opening groove is arranged parallel to the movable telescopic rod.

[0014] Furthermore, an upper flange is provided on the top of the hollow test piece, and the upper flange is fitted with the upper pressing plate.

[0015] Furthermore, the telescopic device includes an upper support plate connected to the upper pressure plate, and the upper support plate is connected to the telescopic assembly.

[0016] Furthermore, a plurality of limiting rods are provided between the telescopic assembly and the supporting base plate, and the upper supporting plate is sleeved on the limiting rods.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] By setting up an upper base plate and a lower base plate, the protrusions and grooves therein cooperate with each other, and then when water is passed into the inside, the water will fill the gap between the protrusions and the grooves. Under the action of the water pressure, the hollow test piece will be pushed upward, so that the upper part of the hollow test piece can fit tightly, further improving the sealing and ensuring the accuracy of the test. This application tests the sealing by passing water into the inside of the hollow test piece. The water will not be compressed, the accuracy is higher, and it is safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic cross-sectional view of an embodiment of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of A in the middle;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of an embodiment of the present utility model.

[0022] Figure 4 This is another schematic diagram of the three-dimensional structure of an embodiment of the present utility model. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The embodiments of the present invention are described below in conjunction with the drawings.

[0024] like Figure 1-4 As shown, a sealing test device includes:

[0025] A frame 6, comprising a supporting base plate 7;

[0026] A test base 8 for supporting the hollow test piece 1, the test base 8 being disposed on the supporting base plate 7. A pressure transmitter is disposed in the hollow test piece 1 for detecting pressure changes inside the hollow test piece 1 and thereby determining the sealing performance;

[0027] A water inlet pipe 16 is connected to the interior of the test base 8 and is connected to both the water pump 12 and the booster pump 13. A valve is provided on the water inlet pipe 16 to close after the water inside is filled and pressurized, so as to test the sealing performance;

[0028] An upper compression sealing assembly is provided above the hollow test piece 1. The upper compression sealing assembly includes an upper pressing plate 2 for sealing the top of the hollow test piece 1. The upper pressing plate is connected to a telescopic device. An upper through hole 17 is provided in the upper pressing plate 2. The upper through hole 17 is connected to a water outlet pipe 11. A pneumatic valve is provided on the water outlet pipe 11. The telescopic device is used to adjust the position of the upper pressing plate 2 to facilitate compression of the hollow test piece 1.

[0029] The hollow test piece 1 is a tubular structure. Before the test, the hollow test piece 1 is placed on the supporting bottom plate 7, and then the hollow test piece 1 is pushed to the bottom of the upper pressure plate 2. The upper pressure plate 2 is pushed by the telescopic device to press the top of the hollow test piece 1. Then the water pump 12 is operated to send external water into the inner cavity of the hollow test piece 1. The pneumatic valve is opened, and the water passes through the inner cavity of the hollow test piece 1 and is discharged from the water outlet pipe 11. After all the air in the inner cavity of the hollow test piece 1 is discharged, the pneumatic valve is closed, and the inner cavity is pressurized by the booster pump. After the pressure reaches a certain pressure, the valve on the water inlet pipe (16) is closed to monitor the internal pressure. If the pressure immediately decreases, it does not meet the requirements. If the pressure decreases again after a period of time, it is judged to meet the requirements.

[0030] The sealing is measured by passing water. Water is incompressible, so the test is more accurate and safer than gas testing.

[0031] The hollow test piece 1 includes a lower flange 19 at the bottom, and the test base 8 includes an upper base plate 81 that is in contact with the lower flange 19. The upper base plate 81 is provided with a plurality of first grooves, and the first sealing ring 14 is provided in the first groove. The hollow test piece 1 and the lower flange 19 are hollow disc structures, and the first grooves are circular structures. By providing multiple circles of first sealing rings 14 with gradually decreasing diameters, it is possible to adapt to hollow test pieces 1 of different sizes, and hollow test pieces 1 of different sizes can be tested.

[0032] The test base 8 also includes a lower base plate 82, which is arranged below the upper base plate 81. The lower base plate 82 has a groove 821 on the side facing the upper base plate 81. The bottom of the upper base plate 81 has a protrusion 812 that cooperates with the groove 821. The side wall of the protrusion 812 has a second groove, and the second sealing ring 15 is disposed in the second groove.

[0033] When pressure is added to the interior of the hollow test piece 1, the gap between the protrusion 812 and the groove 821 is also filled with water. Under the action of the water pressure, the lower base plate 82 is driven upward, that is, the hollow test piece 1 is pushed to fit tightly with the upper pressure plate 2, thereby improving the sealing of the hollow test piece 1 and automatically compensating for the pressure, ensuring the sealing and improving the accuracy of the test.

[0034] The upper base plate 81 is provided with an upper test through-hole 811, the top of which is in communication with the inner cavity of the hollow test piece 1, and the bottom of which is in communication with the groove 821. Water from the water inlet pipe 16 enters the inner cavity of the hollow test piece 1 through the lower test through-hole 822 and the upper test through-hole 811.

[0035] The lower base plate 82 is provided with a lower test through hole 822 therethrough. The top of the lower test through hole 822 is connected to the groove 821 , and the bottom of the lower test through hole 822 is connected to the water inlet pipe 16 for water inlet.

[0036] The lower base plate 82 is connected to the movable telescopic rod 9. The supporting bottom plate 7 is provided with a limiting opening groove 10 that cooperates with the water inlet pipe 16. The limiting opening groove 10 is arranged parallel to the movable telescopic rod 9. The movable telescopic rod 9 is used to push the lower base plate 82 to the testing position, that is, to push the hollow test piece 1 to the bottom of the upper pressing plate 2. After the test is completed, the movable telescopic rod 9 is controlled to pull the hollow test piece 1 out of the upper pressing plate 2 to facilitate the removal and installation of a new test piece. Two movable telescopic rods 9 can be provided to make the push more stable and reliable.

[0037] An upper flange 18 is provided on the top of the hollow test piece 1, and the upper flange 18 fits in contact with the upper pressing plate 2 to expand the contact area and ensure sealing;

[0038] The telescopic device includes an upper support plate 3 connected to the upper pressing plate 2, and the upper support plate 3 is connected to a telescopic assembly 5. The telescopic assembly 5 is used to adjust the position of the upper pressing plate 2 so that it can press the hollow test piece 1;

[0039] A plurality of limit rods 4 are provided between the telescopic assembly 5 and the support base 7. The upper support plate 3 is sleeved on the limit rods 4, so that the upper support plate 3 moves up and down along the limit rods 4, thereby pushing the upper pressure plate 2 to move up and down;

[0040] By setting up the upper base plate 81 and the lower base plate 82, the protrusion 812 and the groove 821 cooperate with each other, and then when water is passed into the interior, the water will fill the gap between the protrusion 812 and the groove 821. Under the action of the water pressure, the hollow test piece 1 will be pushed upward, so that the upper part of the hollow test piece 1 can fit tightly, further improving the sealing and ensuring the accuracy of the test. This application tests the sealing by passing water into the interior of the hollow test piece 1. The water will not be compressed, the accuracy is higher, and it is safer to use.

[0041] The above describes the technical solution of the present invention in conjunction with specific embodiments. However, it should be noted that the above description is only for the purpose of explaining the solution of the present invention and should not be construed in any way as a specific limitation on the scope of protection of the utility model. Based on the explanations herein, those skilled in the art can conceive of other specific embodiments of the present invention or equivalent replacements without inventive effort, and all such replacements will fall within the scope of protection of the present invention.

Claims

1. A sealing test device, characterized in that: include: A frame (6), the frame (6) including a supporting base plate (7); A test base (8) for supporting a hollow test piece (1), the test base (8) being arranged on the supporting base plate (7), and a pressure transmitter being arranged in the hollow test piece (1); a water inlet pipe (16) in communication with the interior of the test base (8), wherein the water inlet pipe (16) is in communication with both the water pump (12) and the booster pump (13); An upper compression sealing assembly is arranged above the hollow test piece (1), the upper compression sealing assembly comprising an upper pressure plate (2) for sealing the top of the hollow test piece (1), the upper pressure plate being connected to the telescopic device, an upper through hole (17) being provided in the upper pressure plate (2), the upper through hole (17) being communicated with the water outlet pipe (11), and a pneumatic valve being provided on the water outlet pipe (11).

2. The sealing test device according to claim 1, characterized in that: The hollow test piece (1) includes a lower flange (19) at the bottom, and the test base (8) includes an upper base plate (81) in contact with the lower flange (19). The upper base plate (81) is provided with a plurality of first grooves, and first sealing rings (14) are provided in the first grooves.

3. The sealing test device according to claim 2, characterized in that: The test base (8) further comprises a lower base plate (82), the lower base plate (82) being arranged below the upper base plate (81), a groove (821) being provided on a side of the lower base plate (82) facing the upper base plate (81), a protrusion (812) cooperating with the groove (821) being provided at the bottom of the upper base plate (81), a second groove being provided on a side wall of the protrusion (812), and a second sealing ring (15) being provided in the second groove.

4. The sealing test device according to claim 3, characterized in that: The upper base plate (81) is provided with a through upper test hole (811), the top of the upper test hole (811) is connected to the inner cavity of the hollow test piece (1), and the bottom of the upper test hole (811) is connected to the groove (821).

5. The sealing test device according to claim 3, characterized in that: The lower base plate (82) is provided with a penetrating lower test through hole (822), the top of the lower test through hole (822) is communicated with the groove (821), and the bottom of the lower test through hole (822) is communicated with the water inlet pipe (16).

6. The sealing test device according to claim 1, characterized in that: The lower base plate (82) is connected to the movable telescopic rod (9), and the supporting base plate (7) is provided with a limiting opening groove (10) that cooperates with the water inlet pipe (16), and the limiting opening groove (10) is arranged parallel to the movable telescopic rod (9).

7. The sealing test device according to claim 1, characterized in that: An upper flange (18) is provided on the top of the hollow test piece (1), and the upper flange (18) is fitted with the upper pressing plate (2).

8. The sealing test device according to claim 1, characterized in that: The telescopic device comprises an upper support plate (3) connected to an upper pressing plate (2), and the upper support plate (3) is connected to a telescopic assembly (5).

9. The sealing test device according to claim 8, characterized in that: A plurality of limiting rods (4) are provided between the telescopic assembly (5) and the supporting base plate (7), and the upper supporting plate (3) is sleeved on the limiting rods (4).

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