Material performance testing machine for metal pipe fitting

Abstract

The utility model provides a material performance testing machine for a metal pipe fitting, and belongs to the technical field of metal pipe material testing. Comprising a rack, a base is arranged at the bottom of the rack, a lifting seat is vertically arranged on the rack and located above the base in a lifting mode, a mounting groove is formed in the base, a sealing layer and a detachably-connected positioning head are arranged on the inner bottom wall of the mounting groove, an abutting disc is arranged on the bottom wall of the lifting seat, and a plurality of positioning rings are concentrically arranged in the abutting disc; a sealing ring is arranged between every two adjacent positioning rings, a water inlet pipe is coaxially arranged on the lifting base and externally connected with a water source through a water pump, and a pressure meter is connected to the water inlet pipe. The two ends of the pipe fitting are positioned and expanded through the positioning head and the positioning ring, so that the two ends of the pipe fitting are sealed by directly abutting against and extruding the sealing layer and the sealing ring, friction between the pipe fitting and the sealing layer and the sealing ring is avoided, the sealing layer and the sealing ring are protected, and the effect of prolonging the service life of the sealing layer and the sealing ring is achieved.

Description

Technical Field

[0001] This utility model relates to the field of metal pipe material testing technology, and in particular to a material performance testing machine for metal pipe fittings. Background Technology

[0002] In materials science and engineering, there is a well-known four-element diagram of materials: composition, microstructure, synthesis, processing, properties, and performance characteristics. Different elemental ratios create different types of alloy materials, different heat treatments impart different microstructures, and specific processing methods achieve performance requirements under different environments. These four elements are interconnected and mutually influential, leading to the development of materials testing. Metal pipe fittings are widely used in many fields, including daily life, production, and construction. Before being manufactured and released to the market, metal pipe fittings undergo numerous performance tests to ensure their performance meets production requirements.

[0003] Patent CN217033416U discloses a pressure resistance testing device for stainless steel pipe fittings, including a base, a fixed frame fixed to the upper end of the base, a water receiving tray fixedly connected to the fixed frame, a sealing plug fixedly connected to the water receiving tray, a motor installed inside the upper end of the base, a threaded rod fixedly connected to the upper end of the motor, an installation plate provided on the outer side of the threaded rod, the installation plate being slidably connected to the fixed frame, a water bucket installed on the installation plate, a sealing plug fixedly connected to the lower end of the water bucket, a connecting pipe provided at the lower end of the water bucket, the lower end of the connecting pipe passing through the sealing plug, a triangular plate fixedly connected to one end of the installation plate on one side of the fixed frame, a spring column fixedly connected inside the fixed frame, and a movable plate slidably connected to the outer side of the spring column.

[0004] However, when the conical sealing plug on the testing machine seals both ends of the pipe, there is a lot of friction between the end face of the pipe and the surface of the sealing plug. This can easily cause wear on the surface of the sealing plug during repeated testing, affecting the sealing performance of the sealing plug on the end of the pipe during the testing process. Utility Model Content

[0005] In view of the above problems, this utility model provides a material property testing machine for metal pipe fittings.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0007] A material property testing machine for metal pipe fittings is provided, including a frame, a base at the bottom of the frame, a lifting seat vertically mounted on the frame above the base, a mounting groove on the base, a sealing layer on the inner bottom wall of the mounting groove, a positioning head for positioning one end of the pipe fitting coaxially and detachably connected in the mounting groove, a contact plate on the bottom wall of the lifting seat, a plurality of positioning rings for positioning the other end of the pipe fitting concentrically arranged in the contact plate, a sealing ring between adjacent positioning rings, a first driving component on the frame for driving the lifting seat to move vertically, a water inlet pipe coaxially mounted on the lifting seat, one end of the water inlet pipe coaxially passing through the contact plate, a telescopic pipe on the frame, one end of the telescopic pipe connected to the water inlet pipe, and the other end connected to an external water source via a water pump, a pressure gauge connected to the water inlet pipe.

[0008] Furthermore, the first driving component includes a driving screw, which is vertically fixedly connected to the lifting seat. A first screw sleeve is rotatably mounted on the frame. The driving screw is fitted and connected inside the first screw sleeve. A first handle is fixedly mounted on the outside of the first screw sleeve.

[0009] Furthermore, the base is provided with a drainage ring groove, and an outlet is provided on the inner side wall of the mounting groove. The outlet is connected to the drainage ring groove, and a drain pipe connected to the drainage ring groove is provided on the base.

[0010] Furthermore, an auxiliary support assembly is provided on the frame. The auxiliary support assembly includes a slider that is horizontally slidably mounted on the frame. An elastic sheet is fixedly mounted on the side of the slider facing the pipe. The end of the elastic sheet away from the slider is used to elastically abut against the outer wall of the pipe. Two elastic sheets are symmetrically arranged on the slider. The symmetrical plane of the two elastic sheets is coplanar with the axis of the abutment plate. Two sets of sliders and elastic sheets are symmetrically arranged on both sides of the pipe. A second driving member is provided on the frame to drive the two sliders to move closer / away synchronously.

[0011] Furthermore, the second driving component includes a bidirectional screw, which is horizontally arranged and rotatably connected to the frame at both ends. A second handle is provided at one end of the bidirectional screw, and a second screw sleeve is fixedly provided on the slider. The second screw sleeves on the two sliders are respectively sleeved on two threaded sections with opposite directions of rotation on the bidirectional screw.

[0012] Furthermore, the positioning ring has a wedge-shaped cross-section. The side of the positioning ring away from the axis forms a guide cone surface that is larger at the top and smaller at the bottom, while the side of the positioning ring close to the axis forms a contraction cone surface that is larger at the top and smaller at the bottom. A receiving groove is formed between the contraction cone surface of the positioning ring and the guide cone surface of the adjacent smaller positioning ring for the sealing ring to be accommodated.

[0013] The beneficial effects of this utility model are as follows: When conducting pressure resistance tests on metal pipe fittings, a positioning head that matches the size of the metal pipe fitting is selected and installed in the mounting groove. The pipe fitting is vertically inserted into the guide head, so that the bottom end of the pipe fitting contacts the sealing layer in the mounting groove. An auxiliary support component is used to provide auxiliary support for the pipe fitting. Then, the abutment plate is lowered so that the top end of the metal pipe fitting is positioned and matched with the positioning ring, and then makes sealing contact with the sealing ring. This effectively avoids friction between the two ends of the pipe fitting and the sealing layer and sealing ring, thus protecting the sealing layer and sealing ring. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the material performance testing machine in use, according to an embodiment of this application.

[0015] Figure 2 This is a schematic diagram of the overall structure of the material performance testing machine from another perspective, according to an embodiment of this application.

[0016] Figure 3 This is a partial cross-sectional view of the base and lifting seat according to an embodiment of this application.

[0017] Figure 4 for Figure 3 A magnified view of part A in the diagram.

[0018] Figure 5 for Figure 3 A magnified view of part B in the diagram.

[0019] The components are as follows: 1. Frame; 2. Base; 21. Mounting groove; 22. Sealing layer; 23. Positioning head; 24. Drainage ring groove; 25. Water outlet; 26. Drain pipe; 27. Connecting bolt; 3. Lifting seat; 31. Abutment plate; 32. Positioning ring; 33. Sealing ring; 34. Receiving groove; 41. Water inlet pipe; 42. Telescopic pipe; 5. Pressure gauge; 61. Drive screw; 62. First screw sleeve; 63. First handle; 7. Auxiliary support assembly; 71. Slider; 72. Elastic sheet; 73. Bidirectional screw; 74. Second handle. Detailed Implementation

[0020] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0021] This application discloses a material property testing machine for metal pipe fittings, referring to... Figure 1 and Figure 2The system includes a frame 1, a base 2 at the bottom of the frame 1, and a lifting seat 3 located above the base 2 on the frame 1. A vertical groove is formed on the frame 1, and a slider 71 is integrally fixed on the lifting seat 3, sliding vertically within the groove. An installation groove 21 is formed on the base 2, and an abutment plate 31 is fixedly installed on the bottom wall of the lifting seat 3. Both the abutment plate 31 and the installation groove 21 are circular and coaxial. A first driving component is provided on the frame 1 to drive the lifting seat 3 to move vertically.

[0022] Reference Figure 3 , Figure 4 and Figure 5 The inner bottom wall of the mounting groove 21 is horizontal, and a sealing layer 22 is provided on the inner bottom wall of the mounting groove 21. A positioning head 23 is coaxially and detachably connected inside the mounting groove 21. Multiple concentric positioning rings 32 are integrally provided on the bottom wall of the abutment plate 31, and a sealing ring 33 is provided between adjacent positioning rings 32. The positioning head 23 and the positioning rings 32 are used to position the two ends of the connecting pipe, so that the pipe is concentrically centered between the mounting groove 21 and the abutment plate 31.

[0023] Specifically, both the sealing layer 22 and the sealing ring 33 are made of rubber. The mounting groove 21 is coaxially formed on the inner bottom wall of the mounting groove 21. The positioning head 23 is cylindrical, and a connecting block adapted to the mounting groove 21 is integrally fixed to its bottom end. A threaded hole is formed in the mounting groove 21, and a through hole is formed on the positioning head 23. The positioning head 23 is threadedly connected to the threaded hole by a connecting bolt 27 passing through the through hole. The top edge of the positioning head 23 is chamfered, allowing the bottom end of the pipe fitting to fit onto the positioning head 23. When the positioning head 23 is connected in the mounting groove 21, its bottom wall contacts the sealing layer 22, ensuring sealing performance when the pipe fitting is pressurized. The detachable positioning head 23 allows for the selection of a positioning head 23 with the same or slightly larger outer diameter as the inner diameter of the pipe fitting being tested. This ensures that after the pipe fitting is guided by the positioning head 23, its end face tightly abuts against the inner bottom wall of the mounting groove 21, preventing wear on the sealing layer 22.

[0024] The positioning ring 32 has a wedge-shaped cross-section. The side of the positioning ring 32 away from its own axis forms a guide cone surface with a larger size at the top and a smaller size at the bottom, while the side of the positioning ring 32 near the axis forms a contraction cone surface with a larger size at the top and a smaller size at the bottom. A receiving groove 34 is formed between the contraction cone surface of the positioning ring 32 and the guide cone surface of the adjacent smaller positioning ring 32, which is used to accommodate the sealing ring 33. When the top of the pipe fitting comes into contact with the abutment, the top of the pipe fitting can be aligned under the guidance of the guide cone surface on the positioning ring 32. When the lifting seat 3 descends, the top of the pipe fitting makes rigid contact with the guide cone surface and is forced to expand outward to make sealing contact with the sealing ring 33. This also avoids wear of the sealing ring 33 caused by frictional contact between the end of the pipe fitting and the sealing ring 33. The wedge-shaped positioning ring 32 can also be adapted to the inspection of pipe fittings of different sizes.

[0025] In this embodiment, a water inlet pipe 41 is coaxially mounted on the lifting seat 3. One end of the water inlet pipe 41 coaxially passes through the abutment plate 31 and can communicate with the interior of the pipe fitting below for alignment. A telescopic pipe 42 is vertically mounted on the frame 1. The telescopic pipe 42 consists of an inner pipe and an outer pipe that slide coaxially. One end of the water inlet pipe 41 above the abutment plate 31 is connected to one end of the telescopic pipe 42. The other end of the telescopic pipe 42 is connected to the base 2. A pipe joint for connecting the telescopic pipe 42 is provided on the base 2. A water pump (not shown in the figure) and a water source are connected to the telescopic pipe 42 through the pipe. A valve is installed on the pipe. A pressure gauge 5 is connected to the water inlet pipe 41. When both ends of the pipe fitting are sealed and pressed between the abutment plate 31 and the mounting groove 21, the water pump is turned on to inject water and pressurize the pipe fitting. After the pipe fitting is full of water, the water pump and valve are turned off, and the abutment plate 31 is continued to be pressed down. The pressure inside the water inlet pipe 41 is monitored in real time to achieve the purpose of testing the pressure resistance performance of the pipe fitting. An air vent valve can be installed on the water inlet pipe 41 to facilitate the venting of air from the pipe during the water injection process.

[0026] In this embodiment, the first driving component includes a driving screw 61, which is vertically fixedly connected to the lifting seat 3. A first screw sleeve 62 is rotatably mounted on the frame 1. The driving screw 61 is fitted inside the first screw sleeve 62, and a first handle 63 is fixedly mounted on the outside of the first screw sleeve 62. By rotating the first handle 63, the first screw sleeve 62 can be driven to rotate, thereby driving the driving screw 61 and the lifting seat 3 to move vertically up and down. In other embodiments, a drive motor can also be used to drive the first screw sleeve 62 to rotate through gear transmission, chain transmission, or other means. The start and stop of the drive motor can be controlled by remote communication control, enabling remote operation by the operator and improving the safety of the experiment.

[0027] After the test, during the removal of the pipe fittings, clean water will flow downwards. To keep the equipment clean, in this embodiment, the base 2 is provided with a drainage ring groove 24, and the inner side wall of the mounting groove 21 is provided with a water outlet 25, which communicates with the drainage ring groove 24. The base 2 is provided with a drain pipe 26, which communicates with the drainage ring groove 24 and connects to a drain pipe or a drainage trough. The design of the mounting groove 21 allows water flowing out from the bottom of the pipe fittings to be intercepted in the mounting groove 21 and discharged through the water outlet 25 and the drainage ring groove 24, thus keeping the test environment clean.

[0028] To maintain the pipe fitting vertically and as centrally as possible during the pressing of the abutment plate 31 against the metal pipe fitting, an auxiliary support assembly 7 is provided on the frame 1 in this embodiment. Specifically, the auxiliary support assembly 7 can be a slider 71 horizontally slidably mounted on the frame 1. The end of the elastic plate 72 away from the slider 71 is used to elastically abut against the outer wall of the pipe fitting. Two elastic plates 72 are symmetrically arranged on each slider 71, and the symmetrical plane of the two elastic plates is coplanar with the axis of the abutment plate 31. Two sets of sliders 71 and elastic plates 72 are symmetrically arranged on both sides of the pipe fitting. A second driving member is provided on the frame 1 to drive the two sliders 71 to move closer / away synchronously. The second driving member can be a bidirectional screw 73, which is horizontally mounted and rotatably connected to the frame 1 at both ends. A second handle 74 is provided at one end of the bidirectional screw 73. A second screw sleeve is fixedly mounted on the slider 71, and the second screw sleeves on the two sliders 71 are respectively fitted onto two threaded sections with opposite directions of rotation on the bidirectional screw 73. By rotating the second handle 74, the bidirectional screw 73 rotates, allowing the two sliders 71 to slide horizontally and linearly under the transmission action of the bidirectional screw 73 and the second screw sleeve, and under the horizontal linear guidance between the sliders 71 and the frame 1. A total of four elastic plates 72 on the two sliders 71 abut against the outer wall of the pipe, thereby supporting the pipe and keeping it vertical, freeing the operator's hands and improving the convenience of experimental operation. Those skilled in the art should understand that although preferred embodiments of this utility model have been described, those skilled in the art, once they understand the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this utility model. Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Thus, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A material property testing machine for metal pipe fittings, characterized in that: The system includes a frame (1), a base (2) at the bottom of the frame (1), a lifting seat (3) vertically mounted on the frame (1) above the base (2), a mounting groove (21) on the base (2), a sealing layer (22) on the inner bottom wall of the mounting groove (21), a positioning head (23) for positioning one end of a pipe fitting coaxially and detachably connected in the mounting groove (21), and an abutment plate (31) on the bottom wall of the lifting seat (3), with several concentric rings for positioning the other end of the pipe fitting. A positioning ring (32) is provided at one end, and a sealing ring (33) is provided between adjacent positioning rings (32). A first driving component for driving the lifting seat (3) to rise and fall vertically is provided on the frame (1). A water inlet pipe (41) is coaxially provided on the lifting seat (3). One end of the water inlet pipe (41) coaxially passes through the abutment plate (31). A telescopic pipe (42) is provided on the frame (1). One end of the telescopic pipe (42) is connected to the water inlet pipe (41), and the other end is connected to an external water source through a water pump. A pressure gauge (5) is connected to the water inlet pipe (41).

2. The material property testing machine for metal pipe fittings according to claim 1, characterized in that, The first driving component includes a driving screw (61), which is vertically fixedly connected to the lifting seat (3). A first screw sleeve (62) is rotatably arranged on the frame (1). The driving screw (61) is fitted and connected inside the first screw sleeve (62). A first handle (63) is fixedly arranged on the outside of the first screw sleeve (62).

3. The material property testing machine for metal pipe fittings according to claim 1, characterized in that, The base (2) is provided with a drainage ring groove (24), and the inner side wall of the mounting groove (21) is provided with a water outlet (25). The water outlet (25) is connected to the drainage ring groove (24), and the base (2) is provided with a drain pipe (26) connected to the drainage ring groove (24).

4. The material property testing machine for metal pipe fittings according to claim 1, characterized in that, An auxiliary support assembly (7) is provided on the frame (1). The auxiliary support assembly (7) includes a slider (71) that is horizontally slidably disposed on the frame (1). An elastic sheet (72) is fixedly disposed on the side of the slider (71) facing the pipe. The end of the elastic sheet (72) away from the slider (71) is used to elastically abut against the outer wall of the pipe. Two elastic sheets (72) are symmetrically disposed on the slider (71). The symmetrical plane of the two elastic sheets is coplanar with the axis of the abutment plate (31). Two sets of sliders (71) and elastic sheets (72) are symmetrically disposed on both sides of the pipe. A second driving member is provided on the frame (1) for driving the two sliders (71) to move closer / away synchronously.

5. A material property testing machine for metal pipe fittings according to claim 4, characterized in that, The second driving component includes a bidirectional screw (73), which is horizontally arranged and rotatably connected to the frame (1) at both ends. A second handle (74) is provided at one end of the bidirectional screw (73). A second screw sleeve is fixedly provided on the slider (71). The second screw sleeves on the two sliders (71) are respectively sleeved on two threaded sections with opposite directions on the bidirectional screw (73).

6. The material property testing machine for metal pipe fittings according to claim 1, characterized in that, The positioning ring (32) has a wedge-shaped cross section. The side of the positioning ring (32) away from the axis forms a guide cone surface with a larger size at the top and a smaller size at the bottom. The side of the positioning ring (32) close to the axis forms a contraction cone surface with a larger size at the top and a smaller size at the bottom. The contraction cone surface of the positioning ring (32) and the guide cone surface of the adjacent smaller positioning ring (32) form a receiving groove (34) for the sealing ring (33) to be accommodated.

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