A tool for testing the sealing performance of a double-flanged straight-through pipe socket
By designing a tooling that includes a base, a connector, and a support, and using threaded connections and welding to form a permanent connection, the problem of cumbersome clamping and disassembly of traditional tooling is solved, enabling rapid and efficient sealing tests and improving testing efficiency.
Patent Information
- Application Number
- CN202521551290.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-24
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-07-24
AI Technical Summary
The traditional double-flange straight pipe fitting sealing test fixture has a cumbersome clamping and disassembly process, resulting in low testing efficiency, which significantly affects product testing efficiency, especially in mass production.
Design a tooling comprising a base, a connector, a support, and a sealing ring, which forms a permanent connection through threaded connection and welding, simplifies the clamping and disassembly process, achieves sealing using a sealing gasket, and provides fluid passage and tool operating structure for the support.
It enables fast and efficient clamping and disassembly, significantly improving product testing efficiency, shortening the testing cycle, and has a simple structure that is easy to maintain.
Smart Images
Figure CN224681735U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a testing fixture, and more particularly to a fixture for testing the sealing performance of a double-flange straight-through pipe joint. Background Technology
[0002] Double-flanged straight-through pipe fittings are important fluid piping connections widely used in aviation, aerospace, marine, and petrochemical industries. Their inlet and outlet ports are connected to other components of the fluid system via flanges. To test the manufacturing quality and sealing performance of double-flanged straight-through pipe fittings, a sealing test is typically performed after manufacturing. Traditional double-flanged straight-through pipe fitting sealing test fixtures are usually designed based on the flange configuration of the product under test. The fixture has flanges with the same holes and sizes as the product under test, and both the fixture and the product under test are connected via flanges and fasteners such as bolts, nuts, and sealing rings. However, connecting the flanges with bolts and nuts usually requires multiple sets of fasteners, making the clamping and disassembly process cumbersome, time-consuming, and labor-intensive. When testing products in large quantities, the processes of clamping, disassembling, and changing are repeated. Traditional double-flange straight pipe joint sealing test fixtures are inefficient in clamping and disassembling, making them particularly inconvenient to use and severely restricting the improvement of product testing efficiency. Utility Model Content
[0003] The purpose of this invention is to provide a tooling for testing the sealing performance of double-flange straight-through pipe fittings, enabling quick clamping and disassembly for the sealing performance testing of double-flange straight-through pipe fittings.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a tooling for sealing performance testing of a double-flange straight-through pipe connector, the tooling comprising a base and a connector; a boss is provided at one end of the base, the outer diameter of which is adapted to the inner diameter of the double-flange straight-through pipe connector, and a sealing gasket is provided between the mating surfaces of the base and the double-flange straight-through pipe connector; one end of the connector is mated to the other end face of the double-flange straight-through pipe connector, and a sealing gasket is provided between the mating surfaces of the connector and the double-flange straight-through pipe connector; the other end of the connector is provided with a nozzle connected to a fluid pressure source of the test bench, and a through hole for oil flow is provided along the central axis of the connector, the through hole communicating with the double-flange straight-through pipe connector.
[0005] Furthermore, it also includes a support column, the two ends of which are respectively connected and fixed to the base and the connector. A central blind hole is provided along the central axis of the support column. The opening end of the central blind hole is close to the connector and communicates with the through hole. A diffuser hole is provided along the radial direction of the support column and communicates with the central blind hole.
[0006] Preferably, the two ends of the support column are respectively provided with external threads, which are screwed into the internal threaded holes opened in the center axis of the base and the joint; the exposed parts of the support column and the base are welded together for fastening.
[0007] Preferably, there are multiple drainage holes, which are evenly distributed around the circumference of the support column.
[0008] Preferably, a sealing ring groove is provided on the end face of the base, the connector and the double flange straight pipe connector, and the sealing gasket is embedded in the sealing ring groove.
[0009] Preferably, hexagonal bosses are provided on the outer surfaces of both the base and the connector.
[0010] Compared with the prior art, the present invention has the following advantages: 1. The design is scientific and ingenious, enabling fast and efficient product clamping and disassembly, greatly shortening the product clamping and disassembly time, thereby shortening the product testing and delivery cycle and significantly improving product testing efficiency. 2. It has a simple structure, is easy to operate, uses few fasteners, and is easy to maintain. Attached Figure Description
[0011] Figure 1 This is an isometric view of the clamping assembly of the double-flange straight pipe connector according to an embodiment of this utility model; Figure 2 This is a front view of the double-flange straight pipe connector clamping assembly according to an embodiment of this utility model; Figure 3 This is a cross-sectional view (AA) of the double-flange straight pipe connector clamping assembly of this utility model embodiment; Figure 4 This is an isometric view of the double-flange straight pipe connector in an embodiment of this utility model; Figure 5 This is a front view of the base in an embodiment of this utility model; Figure 6 This is a front view of the support column in an embodiment of this utility model; Figure 7 This is a front view of the connector in an embodiment of this utility model; Figure 3 In the diagram, 1 is a double-flange straight pipe fitting; 2 is a base; 3 is a sealing ring for the base; 4 is a support; 5 is a sealing ring for the joint; and 6 is the joint. Detailed Implementation
[0012] The following is in conjunction with the appendix Figure 1-7Further details of this utility model: A fixture for testing the sealing performance of a double-flange straight-through pipe connector comprises a base 2, a base sealing ring 3, a support column 4, a connector 6, and a connector sealing ring 5. The base 2 and support column 4 are connected by threads and their connection is secured by welding. The base sealing ring 3 is then pressed into the sealing ring groove of the base 2. The center hole of the double-flange straight-through pipe connector 1 passes through the support column 4 and is positioned on the boss of the base 2. The connector sealing ring 5 is pressed into the sealing ring groove of the connector 6, and then the connector 6 is connected to the support column 4 by threads. During the tightening of the connector 6, the base sealing ring 2 and the connector sealing ring 5 are simultaneously tightened, thereby achieving a seal between the entire fixture and the double-flange straight-through pipe connector to be tested. Finally, the connector 6 is connected to the fluid pressure source of the test bench, and the test is completed by inputting the fluid with the specific test medium and pressure specified in the product technical conditions. Overall, since the base 2 and the support 4 are pre-connected by threads and permanently welded before the double flange straight pipe fitting to be tested is clamped, after the product is loaded, only the threaded connection between the fitting and the support needs to be tightened to clamp the product. When replacing the product with a new part after the product test is completed, only the threaded connection needs to be loosened to quickly disassemble the product. This greatly simplifies the product clamping and disassembly process, thereby significantly improving the product clamping and disassembly efficiency and increasing the product testing efficiency several times over.
[0013] The base uses sealing ring 3 and the joint uses sealing ring 5 to isolate the internal fluid cavity of the pipe joint from the outside atmosphere at the mating point between the joint and the double flange straight pipe joint, preventing fluid leakage from the inside of the pipe joint.
[0014] As a preferred embodiment of this example, Figure 5 As shown, the base 2 is used to support and fix the double flange straight pipe connector 1. The base 2 is designed with threaded holes, stepped shafts, sealing ring grooves and hexagonal bosses. The threaded holes cooperate with the support column 4 to provide axial positioning for the connector. The stepped shaft cooperates with the inner wall of the double flange straight pipe connector 1 to provide radial positioning for the connector. The sealing ring groove cooperates with the sealing ring 3 of the base to achieve sealing. The hexagonal boss is used to provide structural conditions for tightening the base with general tools such as hexagonal wrenches.
[0015] As a preferred embodiment of this example, Figure 6As shown, both ends of the support column 4 are threaded, connecting to the base 2 and the connector 6 respectively. After the support column 4 and the base 2 are connected by threads, the connection part needs to be welded to prevent the threads from loosening. Furthermore, it has a central blind hole along the axial direction and a flow-diffusing hole perpendicular to the axial direction. The support column 4 serves two purposes: firstly, it cooperates with the base and connector to form an axial tightening force, thereby compressing the sealing ring; secondly, it provides a fluid passage for the pressurized fluid input to the connector and provides oil supply to the double-flange straight-through pipe connector 1 to be tested. In addition to its oil supply function, the flow-diffusing hole on the support column 4 also provides structural conditions for tightening the support column with general-purpose tools such as pins.
[0016] As a preferred embodiment of this example, Figure 7 As shown, connector 6 is designed with threaded holes, sealing ring grooves and hexagonal bosses. The threaded holes cooperate with the support column to compress all the sealing rings. The sealing ring grooves cooperate with the sealing rings of the connector to achieve a seal. The hexagonal bosses provide structural conditions for tightening the base with general tools such as hexagonal wrenches.
[0017] Double flange straight pipe fitting 1 sealing test procedure: 1. First, use a pin or other tool to pass through the diffuser hole of the support column 4, rotate the pin to drive the support column 4 to rotate, and then tighten the thread between the base 2 and the support column 4. Then weld the exposed connection parts of the base 2 and the support column 4 to fix them together. 2. Press the base into the sealing ring groove of the base 2 using the sealing ring 3, and press the connector into the sealing ring groove of the connector 6 using the sealing ring 5; 3. Pass the support column 4 through the center hole of the double flange straight pipe fitting 1 until the double flange straight pipe fitting 1 sits on the stepped shaft of the base 2. Then connect the connector 6 to the support column 4 with threads and tighten the support column 4. During the tightening of the support column 4, the sealing ring 3 of the base and the sealing ring 5 of the connector are simultaneously pressed, thereby achieving a seal between the entire tooling and the double flange straight pipe fitting 1 to be tested. 4. Finally, connect connector 6 to the fluid pressure source of the test bench, and input the specific test medium and pressure of the fluid specified in the product technical conditions into connector 6 to complete the test; 5. After the previous product has been tested, loosen the connector 6, remove the double flange straight pipe connector 1, replace it with a new double flange straight pipe connector 1, and repeat steps 3-4 until all double flange straight pipe connectors 1 have been tested.
Claims
1. A tooling for testing the sealing performance of a double-flange straight-through pipe fitting, characterized in that: The tooling includes a base and a connector; one end of the base is provided with a boss, the outer diameter of which is adapted to the inner diameter of the double flange straight pipe connector, and a sealing gasket is provided between the mating surfaces of the base and the double flange straight pipe connector; one end of the connector is mated to the other end face of the double flange straight pipe connector, and a sealing gasket is provided between the mating surfaces of the connector and the double flange straight pipe connector; the other end of the connector is provided with a nozzle that is connected to the fluid pressure source of the test bench, and a through hole for oil flow is opened along the central axis of the connector, and the through hole is connected to the double flange straight pipe connector.
2. The tooling for testing the sealing performance of a double-flange straight-through pipe fitting according to claim 1, characterized in that: It also includes a support column, with its two ends connected and fixed to the base and the connector, respectively. A central blind hole is provided along the central axis of the support column. The opening end of the central blind hole is close to the connector and communicates with the through hole. A diffuser hole is provided along the radial direction of the support column and communicates with the central blind hole.
3. The tooling for testing the sealing performance of a double-flange straight-through pipe fitting according to claim 2, characterized in that: The two ends of the support column are respectively provided with external threads, which are screwed into the internal threaded holes opened in the center axis of the base and the joint; the exposed parts of the support column and the base are welded together for fixation.
4. The tooling for testing the sealing performance of a double-flange straight-through pipe fitting according to claim 2, characterized in that: There are multiple drainage holes, evenly distributed around the circumference of the support column.
5. The tooling for testing the sealing performance of a double-flange straight-through pipe fitting according to claim 1, characterized in that: Sealing grooves are provided on the end faces of the base, connector, and double flange straight pipe fitting, and sealing gaskets are embedded in the sealing grooves.
6. The tooling for testing the sealing performance of a double-flange straight-through pipe fitting according to claim 1, characterized in that: Hexagonal bosses are provided on the outer surfaces of the base and connector.