Single-branch corrugated pipe test fixture

Abstract

The utility model discloses a single branch bellows test fixture relates to test fixture technical field. It includes first half buckle joint, second half buckle joint, input joint, output joint and plugging head, first half buckle joint and second half buckle joint are all semicircular tubular, and the plane side of first half buckle head is fixed with a plurality of inserting posts perpendicularly, and the plane side of second half buckle head is equipped with a plurality of inserting hole for inserting post insertion, and the front end outer wall of first half buckle joint and second half buckle joint is equipped with outer thread, the inside of input joint is equipped with first cylinder channel, second cylinder channel and third cylinder channel in proper order along the axial direction from front to back, and first cylinder channel is equipped with first internal thread, and third cylinder channel is equipped with second internal thread, and the front end of output joint is integrally provided with first cylinder inserting part, and the front end of plugging head is integrally provided with second cylinder inserting part. The utility model discloses simple operation, easy maintenance reduces test cost.

Description

Technical Field

[0001] This utility model relates to the field of testing fixture technology, and in particular to a single-branch corrugated pipe testing fixture. Background Technology

[0002] During the production of stainless steel corrugated pipes, interface components need to be assembled using welding processes, and the joints between the corrugated sections and straight pipe sections need to be sealed using welding processes. After the stainless steel corrugated pipes are welded, a series of tests are required to determine whether they meet quality requirements. These include helium testing, high-pressure nitrogen testing, and particle size analysis. Helium testing involves filling the corrugated pipe with pressurized helium gas and placing it in a sealed testing chamber. A helium mass spectrometer is used to capture helium molecules and quantify the leakage rate. High-pressure nitrogen testing involves filling the corrugated pipe with high-pressure nitrogen gas, maintaining it for a certain period, observing whether the pressure drops, and checking for deformation. Particle size analysis involves connecting the corrugated pipe to a particle size analyzer, flushing the internal channels of the corrugated pipe with a clean liquid, and detecting the particle concentration in the flushing liquid.

[0003] When testing bellows, a test gas or rinsing fluid needs to be introduced into the bellows. Therefore, a test fixture is required to provide accurate connection interfaces for the bellows, ensuring the stability of the connection during testing. Currently, for testing small batches of bellows samples after welding, using mass production test fixtures would result in high testing costs due to the high design and engineering complexity, as well as the stringent requirements for processing and assembly. Therefore, it is necessary to provide a test fixture specifically designed for small batches of bellows. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a single-branch corrugated pipe test fixture that is easy to operate, easy to maintain, and reduces testing costs.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A single-branch corrugated pipe testing fixture includes a first half-connector, a second half-connector, an input connector, an output connector, and a sealing head. Both the first and second half-connectors are semi-circular tubes. The inner wall shapes of the first and second half-connectors match the outer wall shape of the inlet end of the corrugated pipe product. Several insertion posts are vertically fixed to the planar side of the first half-connector, and several insertion holes for inserting the insertion posts are provided on the planar side of the second half-connector. The planar sides of the first and second half-connectors fit together to form a complete circular tube shape to clamp onto the outer wall of the inlet end of the corrugated pipe product. The front end of the snap-fit ​​connector has an external thread; the input connector has a first cylindrical channel, a second cylindrical channel, and a third cylindrical channel arranged axially from front to back. The first cylindrical channel has a first internal thread for connecting the UQD connector, and the third cylindrical channel has a second internal thread for connecting the front end of the first half-thread connector and the second half-thread connector. The front end of the output connector has an integrally formed first cylindrical insertion part for inserting into the outlet end of the corrugated pipe product. The first cylindrical insertion part and the output connector have an axially formed output channel inside. The front end of the sealing head has an integrally formed second cylindrical insertion part for inserting into the outlet end of the corrugated pipe product.

[0007] In some embodiments, the front ends of the first half-connector and the second half-connector are respectively integrally provided with a first connecting portion and a second connecting portion in the shape of a semi-circular tube, the radii of the first connecting portion and the second connecting portion are smaller than the radii of the first half-connector and the second half-connector; external threads are provided on the outer walls of the first connecting portion and the second connecting portion.

[0008] In some embodiments, the inner walls of the first connecting portion and the second connecting portion are provided with a plurality of circumferentially arranged contoured grooves, which match the annular shoulder provided on the outside of the inlet end of the bellows product.

[0009] Compared with the prior art, this utility model achieves at least the following beneficial effects:

[0010] The inner walls of the first and second half-connectors adopt a contoured structure, adjusted according to the different sizes of bellows products. The first and second half-connectors form a complete circular tube shape to clamp onto the outer wall of the bellows product's inlet end, ensuring the bellows product is securely held during testing. The front ends of the connected first and second half-connectors are threaded to the second internal thread of the input connector. The first internal thread of the input connector is threaded to the external UQD connector, which connects to the fluid supply end, ensuring stable fluid transmission and preventing leakage during transmission. This is used for particle size detection and other tests. During testing, the first cylindrical insertion part at the front end of the output connector is inserted into the outlet end of the corrugated pipe product. The flushing fluid is discharged from the output channel of the output connector. The output connector facilitates connection to the corresponding flushing fluid collection equipment. When performing tests such as helium detection and high-pressure nitrogen detection, the second cylindrical insertion part at the front end of the sealing head is inserted into the outlet end of the corrugated pipe product to seal the outlet of the corrugated pipe product and ensure successful completion of the test. The test fixture has a simple overall structure and low manufacturing cost, thereby reducing testing costs. The test fixture is easy to operate and maintain. It is designed for use with single corrugated pipes and is suitable for rapid testing needs in small-batch corrugated pipe production environments. Attached Figure Description

[0011] One or more embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings, in which:

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0013] Figure 2 This is a schematic diagram of the connection structure between the first and second half-lock connectors and the corrugated pipe product according to an embodiment of this application.

[0014] Figure 3 This is a cross-sectional view of the input connector according to an embodiment of this application;

[0015] Figure 4 This is a cross-sectional view of an embodiment of this application in its usage state.

[0016] The numbers in the diagram are as follows: 1. First half-lock connector; 11. Insert post; 12. First connecting part; 2. Second half-lock connector; 21. Insertion hole; 22. Second connecting part; 3. Input connector; 31. First cylindrical channel; 32. Second cylindrical channel; 321. Connecting protrusion ring; 33. Third cylindrical channel; 4. Output connector; 41. First cylindrical insertion part; 42. Output channel; 5. Sealing head; 51. Second cylindrical insertion part; 6. Contouring groove; 7. First step; 8. Second step; 81. First annular mounting groove; 9. Sealing ring; 10. First shoulder; 101. Second annular mounting groove; 20. Second shoulder; 201. Third annular mounting groove; 30. Sealing gasket; 40. Corrugated pipe product; 401. Annular shoulder. Detailed Implementation

[0017] The present invention will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of this application more complete and to fully convey the concept of the present application to those skilled in the art.

[0018] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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 application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0019] like Figures 1-4 As shown in the embodiments of this application, the single-corrugated pipe test fixture can provide a stable test connection interface for a single stainless steel corrugated pipe during operations such as high-pressure nitrogen testing, helium testing, flow channel flushing, and particle size detection. The corrugated pipe test fixture includes a first half-lock connector 1, a second half-lock connector 2, an input connector 3, an output connector 4, and a sealing head 5.

[0020] The first half-connector 1 and the second half-connector 2 are both semi-circular tubes. The inner wall shape of the first half-connector 1 and the second half-connector 2 matches the outer wall shape of the inlet end of the corrugated pipe product 40. Several insertion posts 11 are vertically fixed on the planar side of the first half-connector, and several insertion holes 21 for inserting the insertion posts 11 are provided on the planar side of the second half-connector. The outer wall of the front end of the first half-connector 1 and the second half-connector 2 is provided with external threads. The input connector 3 has a first cylindrical channel 31, a second cylindrical channel 32 and a third cylindrical channel 33 arranged axially from front to back. The first cylindrical channel 31 is provided with a first internal thread, which is used to connect with the external UQD connector (universal quick disconnect connector) and connect to the fluid supply end through the UQD connector. The third cylindrical channel 33 is provided with a second internal thread, which is used to connect with the fluid supply end after the connection is made. The front end of the first half-connector 1 and the second half-connector 2 are threaded together to ensure stable fluid transmission and facilitate disassembly and replacement. The front end of the output connector 4 is integrally provided with a first cylindrical insertion part 41 for inserting into the outlet end of the bellows product 40. The first cylindrical insertion part 41 and the output connector 4 are provided with an axially arranged output channel 42 inside. The output connector 4 is connected to the outlet end of the bellows product 40 through the first cylindrical insertion part 41, which is easy to disassemble and clean. The front end of the sealing head 5 is integrally provided with a second cylindrical insertion part 51 for inserting into the outlet end of the bellows product 40. The sealing head 5 is used to seal the outlet of the bellows product 40. The sealing head 5 and the second cylindrical insertion part 51 are made of high-strength and corrosion-resistant materials, which can work stably for a long time in various complex working environments, effectively prevent fluid leakage, ensure sealing and safety, and are easy to disassemble.

[0021] In use, the planar side of the first half-connector 1 and the planar side of the second half-connector 2 are fitted together, and the insert post 11 is inserted into the insertion hole 21 to achieve a secure connection. The first half-connector 1 and the second half-connector 2 form a complete cylindrical shape to clamp onto the outer wall of the inlet end of the corrugated pipe product 40. The front ends of the connected first half-connector 1 and the second half-connector 2 are threaded to the second internal thread inside the input connector 3, so that the corrugated pipe product 40 is tightly fixed between the first half-connector 1 and the second half-connector 2, ensuring stable fluid transmission and effectively preventing fluid leakage during transmission. The output connector 4 or the sealing head 5 is connected to the outlet of the corrugated pipe product 40. When performing tests such as particle size detection, the first cylindrical plug 41 at the front end of the output connector 4 is inserted into the outlet end of the bellows product 40. The flushing fluid enters the internal channel of the bellows product 40 from the input connector 3 and exits from the output channel 42 of the output connector 4. The output connector 4 is designed to facilitate connection to the corresponding flushing fluid collection equipment, ensuring stable fluid transmission. When performing tests such as helium detection and high-pressure nitrogen detection, the second cylindrical plug 51 at the front end of the sealing head 5 is inserted into the outlet end of the bellows product 40, thereby sealing the outlet of the bellows product 40. The detection gas enters the internal channel of the bellows product 40 from the input connector 3, thus ensuring the successful completion of the test.

[0022] It should be noted that the flat sides of the first half-connector 1 and the second half-connector 2 are precision machined to ensure that the fit clearance between the first half-connector 1 and the second half-connector 2 is just right. It will not cause assembly difficulties due to being too tight, nor will it affect the sealing effect due to being too loose. The first half-connector 1 and the second half-connector 2 are made of wear-resistant materials to improve their service life and reliability. Even during frequent disassembly and assembly, they can maintain good fastening performance.

[0023] Specifically, the front ends of the first half-connector 1 and the second half-connector 2 are respectively integrally provided with a first connecting part 12 and a second connecting part 22 in the shape of a semi-circular tube. The radii of the first connecting part 12 and the second connecting part 22 are smaller than the radii of the first half-connector 1 and the second half-connector 2, which facilitates the insertion of the first half-connector 1 and the second half-connector 2 into the third cylindrical channel 33 of the input connector 3. The external thread is provided on the outer wall of the first connecting part 12 and the second connecting part 22. When the first half-connector 1 and the second half-connector 2 are engaged, the external thread on the first connecting part 12 and the external thread on the second connecting part 22 combine to form a continuous and complete external thread, so that the first half-connector 1 and the second half-connector 2 after engagement can be threadedly connected to the second internal thread of the third cylindrical channel 33. Furthermore, the inner walls of the first connecting part 12 and the second connecting part 22 are provided with a plurality of circumferentially arranged contoured grooves 6. These contoured grooves 6 match the annular shoulder 401 provided on the outside of the inlet end of the corrugated pipe product 40. The contoured grooves 6 are adjusted and designed according to the different sizes of the corrugated pipe products 40. When the first half-clamp joint 1 and the second half-clamp joint 2 are fastened and clamped on the outer wall of the inlet end of the corrugated pipe product 40, the contoured grooves 6 cooperate with the annular shoulder 401 to axially limit the corrugated pipe product 40, ensuring that the corrugated pipe product 40 is firmly clamped during the test and will not be damaged due to excessive clamping force.

[0024] The inner diameter of the first cylindrical channel 31 is larger than the inner diameter of the second cylindrical channel 32, and a first step 7 is formed between the first cylindrical channel 31 and the second cylindrical channel 32. The inner diameter of the third cylindrical channel 33 is larger than the inner diameter of the second cylindrical channel 32, and a second step 8 is formed between the third cylindrical channel 33 and the second cylindrical channel 32. A connecting protrusion 321 is provided at the end of the second cylindrical channel 32 away from the first cylindrical channel 31, and the outer diameter of the connecting protrusion 321 matches the inner diameter of the inlet end of the bellows product 40. A first annular mounting groove 81 is provided around the second step 8 on the outside of the connecting protrusion 321, and a sealing ring 9 is provided in the first annular mounting groove 81. When the first half-connector 1 and the second half-connector 2 are threadedly connected to the second internal thread of the third cylindrical channel 33 after being snapped together, the inlet end of the bellows product 40 abuts against the connecting protrusion 321 and is in close contact with the sealing ring 9. The sealing ring 9 can effectively prevent fluid leakage and improve the accuracy and reliability of the test.

[0025] The outer diameter of the first cylindrical plug portion 41 is smaller than the outer diameter of the output connector 4, and a first shoulder 10 is formed between the first cylindrical plug portion 41 and the output connector 4. A second annular mounting groove 101 is provided around the first shoulder 10 on the outer side of the first cylindrical plug portion 41, and a sealing gasket 30 is provided in the second annular mounting groove 101. When the first cylindrical plug portion 41 is inserted into the outlet end of the bellows product 40, the sealing gasket 30 abuts against the outlet end of the bellows product 40. The sealing gasket 30 can effectively prevent fluid leakage and ensure the accuracy and reliability of the test.

[0026] The outer diameter of the second cylindrical insertion part 51 is smaller than the outer diameter of the sealing head 5, and a second shoulder 20 is formed between the second cylindrical insertion part 51 and the sealing head 5. A third annular mounting groove 201 is provided around the second shoulder 20 on the outer side of the second cylindrical insertion part 51, and a sealing gasket 30 is also provided in the third annular mounting groove 201. When the second cylindrical insertion part 51 is inserted into the outlet end of the bellows product 40, the sealing gasket 30 abuts against the outlet end of the bellows product 40. The sealing gasket 30 can effectively prevent fluid leakage and ensure the accuracy and reliability of the test.

[0027] It should be understood that all the above embodiments are exemplary and not restrictive. Any modifications, equivalent changes and alterations made by those skilled in the art to the specific embodiments described above under the concept of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A single-branch corrugated pipe testing fixture, characterized in that: It includes a first half-lock connector, a second half-lock connector, an input connector, an output connector, and a sealing head; Both the first and second half-connectors are semi-circular tubes. The inner wall shape of the first and second half-connectors matches the outer wall shape of the inlet end of the corrugated pipe product. Several pins are vertically fixed on the planar side of the first half-connector, and several insertion holes for the pins are provided on the planar side of the second half-connector. The planar sides of the first and second half-connectors fit together to form a complete circular tube shape to clamp on the outer wall of the inlet end of the corrugated pipe product. The front end outer walls of the first and second half-connectors are provided with external threads. The input connector has a first cylindrical channel, a second cylindrical channel and a third cylindrical channel arranged axially from front to back. The first cylindrical channel has a first internal thread for connecting the UQD connector, and the third cylindrical channel has a second internal thread for connecting the outer wall of the front end of the first half-connector and the second half-connector. The front end of the output connector is integrally provided with a first cylindrical insertion part for inserting into the outlet end of the corrugated pipe product, and the first cylindrical insertion part and the inside of the output connector are provided with an output channel along the axial direction. The sealing head is integrally provided with a second cylindrical insertion part at the front end for insertion into the outlet end of the corrugated pipe product.

2. The single-branch corrugated pipe testing fixture according to claim 1, characterized in that: The front ends of the first half-connector and the second half-connector are respectively integrally provided with a first connecting part and a second connecting part in the shape of a semi-circular tube, and the radii of the first connecting part and the second connecting part are smaller than the radii of the first half-connector and the second half-connector, respectively; the external thread is provided on the outer wall of the first connecting part and the second connecting part.

3. The single-branch corrugated pipe testing fixture according to claim 2, characterized in that: The inner walls of the first and second connecting parts are provided with a plurality of circumferentially arranged contoured grooves, which match the annular shoulder provided on the outside of the inlet end of the corrugated pipe product.

4. The single-branch corrugated pipe testing fixture according to claim 1, characterized in that: The inner diameter of the first cylindrical channel is larger than the inner diameter of the second cylindrical channel, and a first step is formed between the first cylindrical channel and the second cylindrical channel.

5. The single-branch corrugated pipe testing fixture according to claim 1, characterized in that: The inner diameter of the third cylindrical channel is larger than that of the second cylindrical channel, and a second step is formed between the third cylindrical channel and the second cylindrical channel. A connecting protrusion is provided at the end of the second cylindrical channel away from the first cylindrical channel, and the outer diameter of the connecting protrusion matches the inner diameter of the inlet end of the corrugated pipe product.

6. The single-branch corrugated pipe testing fixture according to claim 5, characterized in that: A first annular mounting groove is provided around the outside of the connecting protrusion on the second step, and a sealing ring is provided in the first annular mounting groove.

7. The single-branch corrugated pipe testing fixture according to claim 1, characterized in that: The outer diameter of the first cylindrical plug is smaller than the outer diameter of the output connector, and a first shoulder is formed between the first cylindrical plug and the output connector. A second annular mounting groove is provided around the first shoulder on the outside of the first cylindrical plug, and a sealing gasket is provided in the second annular mounting groove.

8. The single-branch corrugated pipe testing fixture according to claim 1, characterized in that: The outer diameter of the second cylindrical insertion part is smaller than the outer diameter of the sealing head, and a second shoulder is formed between the second cylindrical insertion part and the sealing head. A third annular mounting groove is provided around the second shoulder on the outside of the second cylindrical insertion part, and a sealing gasket is also provided in the third annular mounting groove.

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