Coil rack assembly sealing performance test method

Abstract

The invention discloses a coil rack assembly sealing test method, and belongs to the technical field of coil rack sealing test. The method comprises the following steps: step 1, clamping and fixing an opening end of a coil rack assembly by using a switching tool, and realizing switching of the coil rack assembly; step 2, connecting the switching tool with a test bed interface; and 3, a liquid medium is introduced into the inner cavity of the coil rack assembly for pressurization, pressure maintaining is carried out, and then whether leakage occurs at the weld joint or not is observed. The open end of the coil rack assembly is clamped and fixed through the switching tool so as to realize switching of the coil rack assembly, then the switching tool is connected with a test bed interface, a liquid medium is introduced into an inner cavity of the coil rack assembly for pressurization and pressure maintaining, then whether leakage occurs at a welding seam is observed, and thus the sealing test of the coil rack assembly is completed.

Description

Technical Field

[0001] This invention relates to a method for testing the sealing performance of a coil frame assembly, belonging to the technical field of coil frame sealing test. Background Technology

[0002] The coil frame assembly 1 has a structure with large outer diameters at both ends and small outer diameters in the middle, and is sealed at one end and open at the other. Its specific structure is as follows: Figure 1 As shown, the coil frame assembly 1 is manufactured by welding together parts A11, B12, and C13 made of different materials and then machining them. After the coil frame assembly 1 is formed, in addition to inspecting the weld quality at the weld joints using methods such as X-ray and magnetic particle inspection, it also needs to be transferred using tooling to pressurize the inner cavity of the coil frame assembly 1 for a sealing test, thereby checking the weld strength at the weld joints and preventing oil leakage from the weld joints during the operation of the coil frame assembly 1.

[0003] Chinese patent document CN218564659U discloses an adapter assembly for sealing tests of unthreaded connectors in aircraft. The assembly includes an adapter, a mounting bracket, and a gasket. The adapter is a hollow tube with an adapter end and a working end. The working end has threads on its outer circumference. The mounting bracket is used to detachably mount the adapter to the unthreaded connector, allowing the adapter end to mate with the port of the unthreaded connector and enabling communication between them. The gasket is located between the unthreaded connector and the mounting bracket and uses a clearance fit. This assembly can adapt to unthreaded connectors of different sizes, offering wide applicability, ease of use, low cost, and high reliability.

[0004] The fixing bracket and gasket in the above-mentioned adapter assembly need to be fitted from the small end of the threadless connector onto the threadless connector. However, since the coil frame assembly 1 has a structure that is large at both ends and small in the middle, the above-mentioned adapter assembly cannot be used to transfer the coil frame assembly 1, and therefore it is impossible to pressurize the inner cavity of the coil frame assembly 1 to carry out a sealing test. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a method for testing the sealing performance of a coil frame assembly.

[0006] This invention is achieved through the following technical solution: A method for testing the sealing performance of a coil frame assembly includes the following steps: Step 1: Use the adapter tool to clamp and fix the open end of the coil frame assembly, and realize the adapter of the coil frame assembly; Step 2: Connect the adapter to the interface of the test bench; Step 3: Pressurize the inner cavity of the coil frame assembly by introducing a liquid medium and maintain the pressure, then observe whether there is any leakage at the weld.

[0007] The adapter includes a pipe fitting and a pressure plate, and the pressure plate is detachably connected to the pipe fitting via a connector.

[0008] The pipe fitting includes a coaxially arranged adapter and an extension pipe section. One end of the extension pipe section is connected to one end of the adapter. The adapter has an external thread, and a flange is provided on the outer wall of the adapter near the end of the extension pipe section.

[0009] The extension tube section and the adapter are manufactured as a single unit.

[0010] The outer circumferential edge of the extended pipe section has a groove, and a sealing ring is installed in the groove.

[0011] The pressure plate includes two semi-circular plates, and a semi-circular groove is formed along the axial direction at the center of the semi-circular plate.

[0012] The two semi-circular plates are detachably connected to the flange via a connector.

[0013] The connector is a screw, and the semi-circular plate has a through hole at a position corresponding to the connector. The flange has a threaded hole at a position corresponding to the connector.

[0014] The pressure holding pressure in step three is 1.5 times the normal operating pressure of the coil frame assembly.

[0015] The pressure holding time in step three is 3 to 5 minutes.

[0016] The beneficial effects of this invention are as follows: First, the open end of the coil frame assembly is clamped and fixed by the adapter tool to realize the transfer of the coil frame assembly. Then, the adapter tool is connected to the interface of the test bench, and liquid medium is introduced into the inner cavity of the coil frame assembly for pressurization and pressure holding. Next, observe whether leakage occurs at the weld, thereby completing the sealing test of the coil frame assembly.

[0017] Secondly, the pressure plate is symmetrically cut into two semi-circular plates from the middle, and a semi-circular groove is made axially at the center of each semi-circular plate. The diameter of the semi-circular groove matches the outer diameter of part B in the coil frame assembly. After the semi-circular grooves on the two semi-circular plates are closed to form a complete circle to hold part C in the coil frame assembly, the two semi-circular plates are connected to the pipe fittings through connectors. This realizes the transfer of the coil frame assembly, meeting the transfer requirements of coil frame assemblies that are large at both ends and small in the middle, and ensuring that the inner cavity of the coil frame assembly can be pressurized normally to carry out sealing tests. Third, the two semi-circular plates are detachably connected to the flange through a connector. While ensuring a reliable connection between the semi-circular plates and the flange, the number of connectors is minimized, thereby reducing the workload of assembling and disassembling the connectors during the sealing test, which helps to shorten the test time and improve the test efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the coil frame assembly. Figure 2 This is an assembly diagram of the adapter tooling and coil frame assembly of the present invention; Figure 3 This is a schematic diagram of the pipe fitting of the present invention; Figure 4 This is a schematic diagram of the structure of the pressure plate of the present invention.

[0019] In the diagram: 1-Coil frame assembly, 11-Part A, 12-Part B12, 13-Part C, 14-Weld, 2-Adapter tooling, 3-Pipe fitting, 31-Adapter fitting, 32-Flange, 33-Extension pipe section, 4-Sealing ring, 5-Pressure plate, 51-Semi-circular plate, 52-Semi-circular groove, 53-Through hole, 6-Connector. Detailed Implementation

[0020] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0021] like Figures 1 to 4 As shown, the present invention provides a method for testing the sealing performance of a coil frame assembly, comprising the following steps: Step 1: Use the adapter tool 2 to clamp and fix the open end of the coil frame assembly 1, and realize the adapter of the coil frame assembly 1; Step 2: Connect adapter 2 to the test bench interface; Step 3: Introduce a liquid medium into the inner cavity of the coil frame assembly 1 to pressurize it and maintain the pressure. Then observe whether there is any leakage at the weld 14.

[0022] Specifically, the open end of the coil frame assembly 1 is clamped and fixed by the adapter 2 to realize the adapter of the coil frame assembly 1. Then, the adapter 2 is connected to the interface of the test bench, and liquid medium is introduced into the inner cavity of the coil frame assembly 1 for pressurization and pressure holding. Next, observe whether there is leakage at the weld 14, thereby completing the sealing test of the coil frame assembly 1.

[0023] The adapter 2 includes a pipe fitting 3 and a pressure plate 5. The pressure plate 5 is detachably connected to the pipe fitting 3 via a connector 6.

[0024] The pipe fitting 3 includes a coaxially arranged adapter 31 and an extension pipe section 33. One end of the extension pipe section 33 is connected to one end of the adapter 31. The adapter 31 is provided with external threads, and a flange 32 is provided on the outer wall of the adapter 31 near the end of the extension pipe section 33. The adapter 31 is provided with external threads to facilitate threaded connection with the interface of the test bench.

[0025] The extension tube section 33 and the adapter 31 are integrally manufactured.

[0026] The outer circumferential surface of the extension tube section 33 is provided with a groove, and a sealing ring 4 is installed in the groove. During the test, the sealing ring 4 is used to seal the gap between the coil frame assembly 1 and the extension tube section 33.

[0027] The pressure plate 5 includes two semi-circular plates 51, with a semi-circular slot 52 axially formed at the center of each semi-circular plate 51. The pressure plate 5 is symmetrically cut into two semi-circular plates 51, and a semi-circular slot 52 is formed axially at the center of each semi-circular plate 51. The diameter of the semi-circular slot 52 matches the outer diameter of part B12 in the coil frame assembly 1. After the semi-circular slots 52 on the two semi-circular plates 51 are closed to form a complete circle to hold part C13 in the coil frame assembly 1, the two semi-circular plates 51 are connected to the pipe fitting 3 via connectors 6, thus enabling the coil frame assembly 1 to be transferred. This satisfies the transfer requirements of a coil frame assembly 1 that is large at both ends and small in the middle, ensuring that the inner cavity of the coil frame assembly 1 can be pressurized normally for a sealing test.

[0028] The two semicircular plates 51 are detachably connected to the flange 32 via a connector 6. While ensuring a reliable connection between the semicircular plates 51 and the flange 32, the number of connectors 6 is minimized, thereby reducing the workload of assembling and disassembling connectors 6 during the sealing test, which helps to shorten the test time and improve test efficiency.

[0029] The connector 6 is a screw, and the semi-circular plate 51 has a through hole 53 at a position corresponding to the connector 6. The flange 32 has a threaded hole at a position corresponding to the connector 6.

[0030] The pressure holding pressure in step three is 1.5 times the normal operating pressure of coil frame assembly 1.

[0031] The pressure holding time in step three is 3 to 5 minutes.

Claims

1. A method of testing the sealability of a coil former assembly, characterized by: It comprises the following steps: Step one, using the adapter tool (2) clamping fixed coil holder assembly (1) opening end, and realize coil holder assembly (1) adapter; Step two, the adapter tool (2) and test bench interface connection; Step three, into the liquid medium to the inner cavity of coil holder assembly (1) pressure, and pressure holding, then observe whether the weld (14) leak occurs.

2. The coil former assembly sealability testing method of claim 1, wherein: The adapter tool (2) comprises pipe connector (3) and pressing plate (5), pressing plate (5) through connecting piece (6) and pipe connector (3) can be detachably connected.

3. The coil former assembly sealability testing method of claim 2, wherein: The pipe connector (3) comprises coaxially arranged adapter nozzle (31) and extension pipe section (33), one end of extension pipe section (33) and one end of adapter nozzle (31) are connected, adapter nozzle (31) is provided with external thread, and the outer wall of adapter nozzle (31) near one end of extension pipe section (33) is provided with flange (32).

4. The coil former assembly sealability testing method of claim 3, wherein: The extension pipe section (33) and adapter nozzle (31) are integrally formed.

5. The coil former assembly sealability testing method of claim 3, wherein: The outer circle of the extension pipe section (33) is provided with a groove along the circumference, and a sealing ring (4) is installed in the groove.

6. The coil former assembly sealability testing method of claim 3, wherein: The pressing plate (5) comprises two semicircular plates (51), and semicircular slots (52) are formed in the centers of the semicircular plates (51) along the axial direction.

7. The coil former assembly sealability testing method of claim 6, wherein: Two semicircular plates (51) are detachably connected with flange (32) through a connecting piece (6) respectively.

8. The coil former assembly sealability testing method of claim 7, wherein: The connecting piece (6) is a screw, and the semicircular plate (51) is provided with a through hole (53) at a position corresponding to the connecting piece (6), and the flange (32) is provided with a threaded hole at a position corresponding to the connecting piece (6).

9. The coil former assembly sealability testing method of claim 1, wherein: The pressure holding pressure in step three is 1.5 times of the normal working pressure of the coil holder assembly (1).

10. The coil former assembly sealability testing method of claim 1, wherein: The pressure holding time in step three is 3-5 min.

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