Low pressure bellows press test fixture

Abstract

The utility model discloses low pressure bellows beat pressure test frock, low pressure bellows include flange plate, bellows section, connector, beat pressure test frock includes base, support plate, lower clamping plate, upper clamping plate, a plurality of lower fixed screw rod, a plurality of upper fixed screw rod, and support plate is fixedly connected base through support column, and the periphery of support plate is equipped with a plurality of lower through -hole, and the middle part of lower clamping plate is equipped with center mouth, and the periphery of lower clamping plate is equipped with a plurality of middle through -hole, and a plurality of upper through -hole are equipped on upper clamping plate, and the connector is located in the middle part of upper clamping plate just below. The utility model discloses through support plate and lower clamping plate clamping flange plate, and cooperate lower fixed screw rod bidirectional clamping, realize bellows steady fixed and even stress. The lower sealing ring is established between flange plate and support plate, and the connector is matched with sealing bolt and upper sealing ring, and double -layer sealing guarantees that there is no leakage in testing.

Description

Technical Field

[0001] This utility model belongs to the field of corrugated pipe testing technology, specifically relating to a pressure testing fixture for low-pressure corrugated pipes. Background Technology

[0002] In the nuclear power industry, low-pressure bellows are required. During maintenance within a nuclear power plant, low-pressure bellows need to be regularly inspected and replaced. Performance testing of the low-pressure bellows is necessary during maintenance or when replacing a new one. The testing process generally involves sealing both ends of the bellows, injecting compressed gas at a certain pressure into the bellows, observing the pressure changes inside the bellows using a pressure gauge, or applying soapy water (used for leak detection) to the surface of the bellows to check for leaks. Currently, bellows pressure testing typically uses manual sealing tape or general-purpose clamps, which suffers from poor sealing, cumbersome operation, low efficiency, and difficulty in adapting to different bellows specifications, leading to inaccurate test results. Utility Model Content

[0003] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a low-pressure corrugated pipe pressure testing fixture, wherein the low-pressure corrugated pipe includes a flange, a corrugated section, and a connector connected sequentially from bottom to top; the pressure testing fixture includes a base, a support plate, a lower clamping plate, an upper clamping plate, several lower fixing screws, and several upper fixing screws; the support plate is fixedly connected to the base by a support column; the support plate has several lower through holes around its perimeter; the low-pressure corrugated pipe is placed vertically in the middle of the support plate; the lower clamping plate is placed on the support plate; the lower clamping plate has a central opening in its middle for the corrugated section and the internally threaded connector to pass through; the flange is clamped between the support plate and the lower clamping plate; and the lower clamping plate has several... Several through holes are provided, with each through hole corresponding to a lower through hole. The lower end of the lower fixing screw passes through the through holes and the lower through holes in sequence. The upper fixing screw is threaded with an upper clamping nut and a lower clamping nut. The support plate and the lower clamping plate are located between the upper clamping nuts and the lower clamping nuts. The upper clamping plate is provided with several upper through holes. The upper end of the upper fixing screw passes through the upper through holes and is threaded with a top clamping nut. The lower end of the upper fixing screw passes through the through holes and the lower through holes in sequence and is threaded with a bottom clamping nut. The connector is located directly below the center of the upper clamping plate. An air inlet pipe is fixedly connected to one side of the support column. The middle of the support plate is provided with an air port that connects to the air inlet pipe. A valve is provided on the air inlet pipe.

[0004] As a preferred embodiment of the above technical solution, the connector is threaded with a sealing bolt, and an upper sealing ring is provided between the sealing bolt and the connector.

[0005] As a preferred embodiment of the above technical solution, a lower sealing ring is provided between the flange and the pallet.

[0006] As a preferred embodiment of the above technical solution, the tray is provided with several side openings around its perimeter, and each side opening corresponds to a lower through hole, with the side openings communicating with the corresponding lower through holes.

[0007] As a preferred embodiment of the above technical solution, the upper end of the lower fixing screw is fixedly connected to a hexagonal head.

[0008] The beneficial effects of this utility model are as follows: The low-pressure bellows pressure testing fixture of this utility model uses a support plate and a lower clamping plate to hold the flange, and with the help of the lower fixing screw, it achieves bidirectional clamping, so as to achieve stable fixation of the bellows and uniform force distribution. A lower sealing ring is provided between the flange and the support plate, and the connector is equipped with sealing bolts and an upper sealing ring, so as to ensure no leakage during the test. The side opening design facilitates the installation and removal of the screw, and the upper and lower fixing screw structure improves the convenience of operation. The adjustable structure can adapt to the testing needs of bellows with different pipe diameters. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model. Detailed Implementation

[0010] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0011] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0012] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0013] like Figure 1-2 As shown, a low-pressure corrugated pipe pressure testing fixture is provided. The low-pressure corrugated pipe includes a flange 1, a corrugated section 2, and a connector 3 connected sequentially from bottom to top. The pressure testing fixture includes a base 4, a support plate 5, a lower clamping plate 6, an upper clamping plate 7, several lower fixing screws 8, and several upper fixing screws 9. The support plate 5 is fixedly connected to the base 4 by a support column 10. Several lower through holes 11 are provided around the support plate 5. The low-pressure corrugated pipe is placed vertically in the middle of the support plate 5. The lower clamping plate 6 is placed on the support plate 5. The lower clamping plate 6 has a central opening 12 in the middle for the corrugated section 2 and the internal thread connector 3 to pass through. The flange 1 is clamped between the support plate 5 and the lower clamping plate 6. Several central through holes 13 are provided around the lower clamping plate 6. The central through holes 13 and the lower through holes 11 are connected. In a one-to-one correspondence, the lower end of the lower fixing screw 8 passes through the central through hole 13 and the lower through hole 11 in sequence. The upper clamping nut 14 and the lower clamping nut 15 are threaded onto the lower fixing screw 8. The support plate 5 and the lower clamping plate 6 are located between the upper clamping nut 14 and the lower clamping nut 15. The upper clamping plate 7 has several upper through holes. The upper end of the upper fixing screw 9 passes through the upper through holes and is threaded onto the top clamping nut 17. The lower end of the upper fixing screw 9 passes through the central through hole 13 and the lower through hole 11 in sequence and is threaded onto the bottom clamping nut. The connector 3 is located directly below the center of the upper clamping plate 7. An air inlet pipe 19 is fixedly connected to one side of the support column 10. The middle of the support plate 5 has an air port 20 that connects to the air inlet pipe 19. A valve is provided on the air inlet pipe 19. The support plate 5 and the lower clamping plate 6 use the upper clamping nuts 14 and the lower clamping nuts 15 on the lower fixing screw 8 to clamp the flange 1, fixing and sealing the lower end of the low-pressure bellows. By using the top clamping nut 17 and bottom clamping nut on the upper fixing screw 9, and pressing down the connector 3 with the upper clamping plate 7, the upper end of the low-pressure bellows is fixed and sealed. Then, compressed air of a certain pressure is injected into the low-pressure bellows through the air inlet pipe 19, and the valve is closed. The air pressure in the low-pressure bellows is periodically checked through the air inlet pipe 19. Simultaneously, methods such as spraying soapy water onto the surface of the bellows section 2 can be used to directly observe whether the low-pressure bellows is leaking.

[0014] Furthermore, the connector 3 is threadedly connected to a sealing bolt 21, and an upper sealing ring 22 is provided between the sealing bolt 21 and the connector 3. The sealing bolt 21 utilizes the existing internal threads inside the connector 3 for threaded connection. The upper sealing ring 22 ensures the sealing of the connection between the connector 3 and the sealing bolt 21.

[0015] Furthermore, a lower sealing ring 23 is provided between the flange 1 and the pallet 5. The lower sealing ring 23 ensures the sealing of the connection between the flange 1 and the pallet 5.

[0016] Furthermore, the support plate 5 is provided with several side openings 24 around its perimeter, each side opening 24 corresponding to a lower through hole 11, and the side opening 24 is connected to the corresponding lower through hole 11. The side openings 24 facilitate the direct lateral installation of the lower fixing screw 8 and the upper fixing screw 9.

[0017] Furthermore, a hexagonal head 25 is fixedly connected to the upper end of the lower fixing screw 8. The hexagonal head 25 facilitates the rotation of the entire lower fixing screw 8 using tools.

[0018] It is worth mentioning that the technical features of low-pressure bellows, valves, etc. involved in this utility model patent application should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be conventionally selected in the field and should not be regarded as the inventive point of this utility model patent. This utility model patent will not elaborate further.

[0019] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experimentation on the basis of the prior art should be within the scope of protection defined by the claims.

Claims

1. A pressure testing fixture for a low-pressure bellows, the low-pressure bellows comprising a flange, a bellows section, and a connector connected sequentially from bottom to top, characterized in that... The pressure testing fixture includes a base, a support plate, a lower clamping plate, an upper clamping plate, several lower fixing screws, and several upper fixing screws. The support plate is fixedly connected to the base via support columns. Several lower through holes are provided around the support plate. A low-pressure corrugated pipe is placed vertically in the center of the support plate. The lower clamping plate is placed on the support plate. The center of the lower clamping plate has a central opening for the corrugated section and internal threaded connector to pass through. A flange is clamped between the support plate and the lower clamping plate. Several central through holes are provided around the lower clamping plate, with each central through hole corresponding to a lower through hole. The lower ends of the lower fixing screws pass through the central through holes sequentially. The upper and lower clamping plates are located between the upper and lower clamping nuts and the lower through hole. The upper clamping plate has several upper through holes. The upper end of the upper fixing screw passes through the upper through hole and is threaded to the top clamping nut. The lower end of the upper fixing screw passes through the middle through hole and the lower through hole and is threaded to the bottom clamping nut. The connector is located directly below the middle of the upper clamping plate. An air inlet pipe is fixedly connected to one side of the support column. The middle of the support plate has an air port that connects to the air inlet pipe. A valve is provided on the air inlet pipe.

2. The low-pressure bellows pressure testing fixture as described in claim 1, characterized in that, The connector is threaded with a sealing bolt, and an upper sealing ring is provided between the sealing bolt and the connector.

3. The low-pressure bellows pressure testing fixture as described in claim 1, characterized in that, A lower sealing ring is provided between the flange and the pallet.

4. The low-pressure bellows pressure testing fixture as described in claim 1, characterized in that, The tray has several side openings around its perimeter, each side opening corresponding to a lower through hole, and the side openings are connected to the corresponding lower through holes.

5. The low-pressure bellows pressure testing fixture as described in claim 1, characterized in that, The upper end of the lower fixing screw is fixedly connected to a hexagonal head.

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