A device for testing the pressure resistance of tubular porous metal elements

Abstract

The application discloses a kind of tubular porous metal element pressure strength testing device, including the fixture of clamping tubular porous metal element, the fixture includes flange, the center pipeline is provided on the flange, the other end of the center pipeline is connected with ground plate, a plurality of medium holes are opened on the center pipeline, the center pipeline is connected with conveying pipeline, the other end of the conveying pipeline is connected with medium groove, the conveying pipeline is also provided with pressurizer and pressure gauge.The tubular porous metal element is clamped by flange and ground plate, a stable placement space is provided, which is beneficial to the stability of subsequent testing process, the center pipeline with a plurality of medium holes is set to uniformly deliver medium to the inside of porous metal element, effectively simulates the service process of tubular porous metal element under actual working conditions, improves the pressure range of pressure strength test, the measured data result is stable and accurate, reduces the damage to sample.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of porous metal element pressure resistance performance characterization, and particularly relates to a tubular porous metal element pressure resistance testing device. BACKGROUND

[0002] Metal porous materials are materials with three-dimensional interconnected pore structures, good material diversity and permeability, and are high-efficiency filtering and separating and flow control materials. Due to the advantages of light weight, high temperature resistance, high strength, corrosion resistance and stable structure, the metal porous materials have broad application prospects in harsh environments such as high temperature and high pressure.

[0003] The process route of pressing-sintering with metal powder as raw material is one of the main technical methods for preparing metal porous materials. The tubular porous metal element prepared by the method has the characteristics of large specific surface area, high porosity and high permeability. However, in the actual service process, most of the working conditions are in a high temperature and high pressure state, and after repeated back blowing, the permeability of the pores of the porous metal element decreases, which leads to an increase in the system pressure of the device, and therefore the pressure resistance of the porous metal element is required. In Appendix A of GB / T 6886-2019 "Sintered Metal Filter Element", a corresponding testing method and device principle are proposed for the tubular porous metal element. However, the clamp in the device adopts a welded flange form, the sample retest rate is low, the destruction is strong, and at the same time, cracks may occur at the welded part and the internal structure of the porous metal element may be damaged, which cannot realize high pressure testing and cannot meet the actual working condition requirements.

[0004] Therefore, a tubular porous metal element pressure resistance testing device is needed. SUMMARY

[0005] The technical problem to be solved by the application is to provide a tubular porous metal element pressure resistance testing device to solve the problems of the prior art. The device clamps the tubular porous metal element through the cooperation of the flange and the ground plate, provides a stable placement space, is beneficial to the stability of the subsequent testing process, uniformly delivers the medium to the inside of the porous metal element through the center pipeline provided with a plurality of medium holes, effectively simulates the service process of the tubular porous metal element under actual working conditions, improves the pressure range of the pressure resistance test, and the measured data result is stable and accurate, and the damage to the sample is reduced.

[0006] In order to solve the above technical problems, the technical scheme adopted by the present application is: a kind of tubular porous metal element pressure strength testing device, it is characterized in that, the device includes the fixture of clamping tubular porous metal element, the fixture includes flange plate, the center pipeline is provided on the flange plate, the other end of the center pipeline is connected with ground plate, a plurality of medium holes are opened in the center pipeline, the center pipeline is connected with conveying pipeline, the other end of the conveying pipeline is connected with medium groove, the conveying pipeline is also provided with pressure generator and pressure gauge.

[0007] The tubular porous metal element pressure strength testing device described above is characterized in that the flange plate is provided with a first circular groove, the ground plate is provided with a second circular groove corresponding to the first circular groove, and a rubber gasket is installed in the first circular groove and the second circular groove.

[0008] The tubular porous metal element pressure strength testing device described above is characterized in that the center pipeline is provided with an interface extending out of the flange plate at the end connected with the flange plate, and the length of the interface is 5mm-10mm.

[0009] The tubular porous metal element pressure strength testing device described above is characterized in that the end of the center pipeline connected with the ground plate is provided with external threads, and the ground plate is provided with an internal thread hole corresponding to the external threads.

[0010] The tubular porous metal element pressure strength testing device described above is characterized in that a glassware is provided outside the fixture.

[0011] The tubular porous metal element pressure strength testing device described above is characterized in that the length of the center pipeline is 140mm-160mm.

[0012] The tubular porous metal element pressure strength testing device described above is characterized in that the flange plate and the center pipeline are integrally formed.

[0013] The tubular porous metal element pressure strength testing device described above is characterized in that 7-8 rows of medium holes are uniformly opened in the center pipeline along the axial direction, each row of the medium holes is 6, the interval of adjacent each row of the medium holes is 10mm-20mm, and the diameter of the medium holes is 3mm-5mm.

[0014] Compared with the prior art, the present application has the following advantages:

[0015] 1. The flange and ground plate cooperate to clamp the tubular porous metal element, provide a stable placement space, facilitate the stability of the subsequent test process, the central pipeline provided with a plurality of medium holes uniformly delivers medium to the inside of the porous metal element, effectively simulates the service process of the tubular porous metal element under actual working conditions, improves the pressure range of the pressure strength test, the measured data result is stable and accurate, and the damage to the sample is reduced.

[0016] 2. The central pipeline and the ground plate are connected by threads, the tubular porous metal element is clamped, the distance between the ground plate and the flange is adjusted by controlling the rotation of the ground plate on the central pipeline, not only a stable test space is provided for the tubular porous metal element, but also the distance between the clamps can be adjusted by the thread height to meet the test requirements of tubular porous metal elements of different specifications and materials, so that it is suitable for tubular porous metal elements of different sizes and adjusts the sealing effect.

[0017] 3. The tubular porous metal element pressure strength testing device can reduce the damage to the sample, repeatedly test the sample, reduce the damage to the hole structure of the porous metal element caused by welding, avoid cracks at the welding seam, cause the test pressure to be unable to rise, and meet the actual working condition requirements, has a simple structure, is easy to operate, is easy to install, is convenient to carry, is safe, and is suitable for pressure strength testing of tubular porous metal elements of different materials.

[0018] 4. The tubular porous metal element solves the deficiencies of the existing test method and device, effectively simulates the service process of the tubular porous metal element under actual working conditions, improves the pressure range of the pressure strength test, the measured data result is stable and accurate, and the damage to the sample is reduced.

[0019] 5. The present application relates to the field of porous metal element pressure strength performance characterization, in particular to a pressure strength testing device for various material porous materials prepared by powder metallurgy, which can realize fast, convenient and simple operation, is convenient to carry, the measured data is accurate and reliable, and provides data support for the working condition application of metal porous materials.

[0020] The technical solutions of the present application will be further described in detail below with reference to the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic view of the tubular porous metal element pressure strength testing device of the present application.

[0022] Figure 2 It is a connection structure schematic view of the flange and the central pipeline in the tubular porous metal element pressure strength testing device of the present application.

[0023] Figure 3 The structural diagram of the ground plate of the pressure strength testing device for the tubular porous metal element of the present application.

[0024] Explanation of reference numerals:

[0025] 1 - flange plate; 1-1 - first circular groove; 2 - central pipeline;

[0026] 2-1 - medium hole; 2-2 - interface; 3 - ground plate;

[0027] 3-1 - second circular groove; 3-2 - internal threaded hole; 4 - conveying pipeline;

[0028] 5 - medium groove; 6 - pressure device; 7 - pressure gauge;

[0029] 8 - glassware; 9 - tubular porous metal element. DETAILED DESCRIPTION

[0030] The pressure strength testing device for the tubular porous metal element of the present application is described in detail through Example 1.

[0031] Example 1

[0032] As shown in Figure 1 and Figure 2 , the pressure strength testing device for the tubular porous metal element of the present embodiment includes a clamp for clamping the tubular porous metal element 9, which includes a flange plate 1, the flange plate 1 is provided with a central pipeline 2, the other end of the central pipeline 2 is connected with a ground plate 3, a plurality of medium holes 2-1 are opened on the central pipeline 2, the central pipeline 2 is connected with a conveying pipeline 4, the other end of the conveying pipeline 4 is connected with a medium groove 5, and the conveying pipeline 4 is further provided with a pressure device 6 and a pressure gauge 7.

[0033] It should be noted that the tubular porous metal element 9 is clamped by the cooperation of the flange plate 1 and the ground plate 3, which provides a stable placement space and is conducive to the stability of the subsequent testing process, the central pipeline 2 provided with a plurality of medium holes 2-1 is used to uniformly convey the medium into the porous metal element, which effectively simulates the service process of the tubular porous metal element 9 under actual working conditions, improves the pressure range of the pressure strength test, and the measured data result is stable and accurate, reducing the damage to the sample.

[0034] It needs to be explained that by connecting the central pipeline 2 with the conveying pipeline 4, the other end of the conveying pipeline 4 is connected with the medium tank 5, so that the medium in the medium tank 5 is input to the central pipeline 2 through the conveying pipeline 4, and then uniformly flows out through the medium hole 2-1 on the central pipeline 2, thereby inputting the medium into the tubular porous metal element 9, extracting the medium in the medium tank 5 through the pressure device 6, providing a certain pressure for the medium, and detecting the real-time pressure through the pressure gauge 7, so as to monitor the pressure of the pressure resistance test and obtain accurate and reliable test pressure data.

[0035] It needs to be explained that the medium is oil or water, and the test device of the embodiment is suitable for the pressure resistance test of the tubular porous metal element 9 under different medium conditions.

[0036] As shown in Figure 2 and Figure 3 , in the embodiment, the flange plate 1 is provided with a first circular groove 1-1, the ground plate 3 is provided with a second circular groove 3-1 corresponding to the first circular groove 1-1, and the first circular groove 1-1 and the second circular groove 3-1 are both provided with rubber gaskets. The first circular groove 1-1 and the second circular groove 3-1 are machined on the flange plate 1 and the ground plate 3 respectively, the tubular porous metal element 9 is clamped through the first circular groove 1-1 and the second circular groove 3-1, the sealing property is improved by installing rubber gaskets in the first circular groove 1-1 and the second circular groove 3-1, and a buffer is formed during the tightening process of the ground plate 3 to prevent the tubular porous metal element 9 from being crushed during clamping, thereby solving the sealing problem of the tubular porous metal element 9 under high pressure.

[0037] It needs to be explained that the width of the first circular groove 1-1 and the second circular groove 3-1 is controlled to be suitable for tubular porous metal elements 9 with different wall thicknesses.

[0038] As shown in Figure 2 , in the embodiment, the end of the central pipeline 2 connected with the flange plate 1 is provided with an interface 2-2 extending out of the flange plate 1, and the length of the interface 2-2 is 5mm-10mm. The interface 2-2 is provided to facilitate the connection of the central pipeline 2 with the conveying pipeline 4, and to facilitate the direct input of the medium into the central pipeline 2 by the conveying pipeline 4.

[0039] As shown in Figure 2 and Figure 3 , in the embodiment, the end of the central pipeline 2 connected with the ground plate 3 is provided with external threads, and the ground plate 3 is provided with an internal thread hole 3-2 corresponding to the external threads. The central pipeline 2 and the ground plate 3 are connected by threads to clamp the tubular porous metal element 9, and the distance between the ground plate 3 and the flange plate 1 is adjusted by controlling the rotation of the ground plate 3 on the central pipeline 2, so as to be suitable for tubular porous metal elements 9 with different sizes and to adjust the sealing effect.

[0040] As Figure 1 shown in the embodiment, the glassware 8 is arranged outside the clamp. The glassware 8 is arranged to receive the medium flowing out of the tubular porous metal element 9, and facilitates observation of the tubular porous metal element 9, observation of the appearance change of the tubular porous metal element 9 during the test process, obtaining of accurate pressure data, and then obtaining of the pressure resistance of the tubular porous metal element 9.

[0041] In the embodiment, the length of the central pipeline 2 is 140mm-160mm. By controlling the length of the central pipeline 2 excluding the external thread part, the distance between the ground plate 3 and the flange plate 1 is controlled, and the tubular porous metal element 9 of different lengths is applicable.

[0042] In the embodiment, the flange plate 1 and the central pipeline 2 are integrally formed. By integrally forming the flange plate 1 and the central pipeline 2, the pressure leakage point caused by the welding of the porous metal element and the flange plate 1 in the traditional test method is avoided, and the accuracy of the test is improved.

[0043] As Figure 2 shown in the embodiment, the central pipeline 2 is uniformly provided with 7-8 rows of medium holes 2-1 in the axial direction, each row of the medium holes 2-1 is 6, the interval between each adjacent row of the medium holes 2-1 is 10mm-20mm, and the diameter of the medium hole 2-1 is 3mm-5mm. By controlling the parameters of the medium hole 2-1, it is ensured that the medium uniformly enters the tubular porous metal element 9, and thus the accuracy of the test is ensured.

[0044] As Figure 1 , Figure 2 and Figure 3 shown, in actual use, the following steps are included:

[0045] Step one, place the tubular porous metal element 9 in the first circular groove 1-1 on the flange plate 1, then connect the ground plate 3 to the central pipeline 2 through threads, clamp the tubular porous metal element 9, and obtain the clamped tubular porous metal element 9;

[0046] Step two, connect the interface 2-2 of the central pipeline 2 in the clamped tubular porous metal element 9 obtained in step one to the conveying pipeline 4, then connect the other end of the conveying pipeline 4 to the medium groove 5 filled with medium, and place the clamped tubular porous metal element 9 in the glassware 8, and obtain the device to be tested;

[0047] Step three, through the pressure device 6 and the conveying pipeline 4 in the device to be tested obtained in step two, the medium is conveyed to the central pipeline 2, and passes through the tubular porous metal element 9, the data of the pressure gauge 7 and the tubular porous metal element 9 are observed, and the pressure resistance of the tubular porous metal element 9 is obtained.

[0048] The above merely illustrates the preferred embodiments of the present application, but is not intended to limit the present application. Any simple modification, change and equivalent variation of the above embodiments according to the spirit of the present application shall still fall within the protection scope of the present application.

Claims

1. A testing device for the pressure resistance of a tubular porous metal component, characterized in that, The device includes a clamp for holding a tubular porous metal element (9), the clamp including a flange (1), a central pipe (2) is provided on the flange (1), the other end of the central pipe (2) is connected to a base (3), the central pipe (2) is provided with a plurality of medium holes (2-1), the central pipe (2) is connected to a conveying pipe (4), the other end of the conveying pipe (4) is connected to a medium tank (5), and a pressure booster (6) and a pressure gauge (7) are also provided on the conveying pipe (4); a first annular groove (1-1) is provided on the flange (1), and a second annular groove (3-1) corresponding to the first annular groove (1-1) is provided on the base (3), and rubber gaskets are installed in both the first annular groove (1-1) and the second annular groove (3-1); The central pipe (2) is connected to the base (3) with an external thread at one end, and the base (3) is provided with an internal thread hole (3-2) corresponding to the external thread; the length of the central pipe (2) is 140mm~160mm; the central pipe (2) is provided with 7~8 rows of medium holes (2-1) evenly opened along the axial direction, each row of medium holes (2-1) has 6 holes, the interval between adjacent rows of medium holes (2-1) is 10mm~20mm, and the diameter of the medium holes (2-1) is 3mm~5mm; the central pipe (2) is connected to the flange (1) with an interface (2-2) extending out of the flange (1), the length of the interface (2-2) is 5mm~10mm; the flange (1) and the central pipe (2) are integrally formed.

2. The device for testing the pressure resistance of a tubular porous metal component according to claim 1, characterized in that, A glass container (8) is provided on the outside of the clamp.

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