Pipe inner wall supporting device applicable to pipe fitting testing machine

Abstract

The utility model provides a pipe inner wall supporting device applicable to a pipe fitting testing machine, and belongs to the technical field of mechanical property detection of metal materials. Comprising a chock plug, the chock plug is divided into a plurality of abutting blocks with arc-shaped sections in the circumferential direction of the chock plug, a mounting channel is formed among the abutting blocks, a first conical block and a second conical block are oppositely arranged at the two ends of the mounting channel in a sliding mode, and the conical surfaces of the first conical block and the second conical block movably abut against the edges of the two ends of the inner arc surfaces of the abutting blocks correspondingly. And a driving piece for driving the first conical block and the second conical block to move is arranged in the mounting channel. The chock plug can support the inner walls of the pipe fittings of various specifications and models, chock plugs of various models do not need to be manufactured to be matched with the corresponding pipe fittings, and the effect of reducing the test cost is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal material mechanical property detection, in particular to a pipe inner wall supporting device suitable for a pipe testing machine. Background Art

[0002] In industrial production, for some metal pipe fittings, it is usually necessary to select some test pipe fittings from a batch of products and conduct destructive tensile tests to test the performance of their metal materials.

[0003] During the test, the two ends of the pipe fitting need to be fixed on the pipe fitting test machine by clamping, and then the pipe fitting test machine is started and the two ends of the pipe fitting are stretched until the pipe fitting is broken. However, the inside of the pipe fitting is hollow, and during the clamping process, the pipe fitting will be greatly deformed due to insufficient force in the hollow part, resulting in metal damage, causing the test fracture at the clamping position, resulting in invalid sample data.

[0004] In order to reduce the deformation of the clamping part, it is necessary to use a plug to fill the inside of the pipe so that the outer wall of the plug fits tightly with the inner wall of the pipe. When testing pipes of various specifications and models, the inner diameters of the pipes are different, so it is necessary to equip various types of plugs to adapt to the corresponding pipes. However, the production of plugs is time-consuming and labor-intensive, so there is a problem of high testing costs. Utility Model Content

[0005] In view of the above problems, the utility model provides a pipe inner wall supporting device suitable for a pipe testing machine.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is as follows:

[0007] A pipe inner wall supporting device suitable for a pipe testing machine is provided, comprising a plug head, which is divided into a plurality of abutment blocks with arc-shaped cross-sections along its own circumference, an installation channel is formed between the plurality of abutment blocks, a first cone block and a second cone block are provided at both ends of the installation channel for sliding toward each other, the conical surfaces of the first cone block and the second cone block are respectively movably abutted against the edges of the two ends of the inner arc surface of the abutment block, and a driving member for driving the first cone block and the second cone block to move is provided in the installation channel.

[0008] Furthermore, the driving member includes a screw rod, the screw rod moves through the installation channel, the first cone block is fixedly arranged at one end of the screw rod, and the second cone block is threadedly connected to the other end of the screw rod.

[0009] Furthermore, the outer wall of one end of the plug close to the first cone block is set to be a hemispherical surface.

[0010] Furthermore, the abutment block is a metal sheet with elasticity.

[0011] Furthermore, the end of the abutment block is provided with an arc chamfer for fitting with the conical surface of the first cone block / the second cone block.

[0012] Furthermore, a connecting piece is provided between the multiple abutment blocks, and the connecting piece includes a positioning ring and multiple telescopic rods. The positioning ring is coaxially inserted into the installation channel, and the multiple telescopic rods are evenly arranged on the outer wall of the positioning ring around the circumference of the positioning ring. The two ends of the telescopic rod are respectively fixedly connected to the outer wall of the positioning ring and the corresponding inner arc surface of the abutment block, and the screw rod movably passes through the inner side of the positioning ring.

[0013] The beneficial effects of the utility model are as follows: the plug is inserted into the pipe fitting to be tested, and the second cone block can be rotated to make the second cone block move along the axial direction of the screw; when the first cone block and the second cone block are close to each other, the abutment block is subjected to the force on the conical surfaces of the first cone block and the second cone block, and moves in the direction away from the axis of the plug until the outer arc surface of the abutment block abuts against the inner wall of the pipe fitting; the plug of the present application can support the inner walls of pipe fittings of various specifications and models, and has the effect of reducing the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a pipe inner wall support device suitable for a pipe testing machine according to an embodiment of the present application.

[0015] Figure 2 Schematic diagram of the connecting member structure of a pipe inner wall support device suitable for a pipe testing machine according to an embodiment of the present application

[0016] Figure 3 This is a schematic diagram of the internal structure of a plug head of a pipe inner wall supporting device suitable for a pipe testing machine according to an embodiment of the present application.

[0017] Among them, 1. plug; 11. abutment block; 111. arc chamfer; 12. installation channel; 2. first cone block; 3. second cone block; 31. notch; 4. drive member; 41. screw; 5. connector; 51. positioning ring; 52. telescopic rod; 6. pipe fitting. DETAILED DESCRIPTION

[0018] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] The present application embodiment discloses a pipe inner wall support device suitable for a pipe testing machine, referring to Figure 1 , Figure 2 and Figure 3, including a plug 1, which is divided into multiple abutment blocks 11 with arc-shaped cross-sections along its own circumference, and an installation channel 12 is formed between the multiple abutment blocks 11. The first cone block 2 and the second cone block 3 are slidingly arranged at both ends of the installation channel 12. The conical surfaces of the first cone block 2 and the second cone block 3 are movably abutted with the two end edges of the inner arc surface of the abutment block 11 respectively, and a driving member 4 for driving the first cone block 2 and the second cone block 3 to move is installed in the installation channel 12.

[0020] In the embodiment of the present application, the plug 1 is inserted into the pipe 6 to be tested, and the first cone block 2 and the second cone block 3 can be driven to move toward each other and approach each other through the driving member 4. During the movement, the abutment block 11 is subjected to the force on the conical surfaces of the first cone block 2 and the second cone block 3, and moves in the direction away from the axis of the plug 1 until the outer arc surface of the abutment block 11 abuts against the inner wall of the pipe 6. In this way, the plug 1 of the present application can support the inner wall of pipes 6 of various specifications and models, and there is no need to make multiple models of plugs 1 to adapt to the corresponding pipes 6, which has the effect of reducing the test cost.

[0021] Specifically, the driving member 4 includes a screw rod 41 , which moves through the installation channel 12 , the first cone block 2 is welded and fixed to one end of the screw rod 41 , and the second cone block 3 is threadedly connected to the other end of the screw rod 41 .

[0022] In the embodiment of the present application, two notches 31 are provided on a side of the second cone block 3 away from the first cone block 2. After the plug 1 is inserted into the pipe fitting 6, the staff can clamp the side walls of the two notches 31 with the help of a wrench or other clamping tools, and then rotate the second cone block 3 to move the second cone block 3 along the axis of the screw 41, so as to achieve the effect of driving the first cone block 2 and the second cone block 3 to move in opposite directions.

[0023] In order to facilitate the insertion of the plug 1 into the pipe 6, the outer wall of one end of the plug 1 close to the first cone block 2 is designed to be a hemispherical surface.

[0024] Furthermore, the abutment block 11 is a metal sheet with elastic function. When the outer arc surface of the abutment block 11 contacts the inner wall of the pipe 6, the second cone block 3 is continuously rotated, so that the first cone block 2 and the second cone block 3 continue to apply force to the edge of the inner arc surface of the abutment block 11, and then the abutment block 11 is stretched open so that the outer arc surface fits the inner wall of the pipe 6, and the edge of the inner arc surface fits the conical surface of the first cone block 2 and the second cone block 3. This makes the force on the inner and outer arc surfaces of the abutment block 11 more uniform, and the supporting effect on the inner wall of the pipe 6 is better.

[0025] Furthermore, the end of the abutment block 11 is provided with an arc chamfer 111 for fitting with the conical surface of the first cone block 2 / the second cone block 3. In this way, the contact area between the first cone block 2 and the second cone block 3 and the inner arc surface edge of the abutment block 11 can be increased, thereby improving the supporting effect of the abutment block 11 on the inner wall of the pipe 6.

[0026] Furthermore, a connecting member 5 is installed between the multiple abutment blocks 11, and the connecting member 5 includes a positioning ring 51 and multiple telescopic rods 52. The positioning ring 51 is coaxially arranged in the installation channel 12, and the multiple telescopic rods 52 are evenly arranged on the outer wall of the positioning ring 51 around the circumference of the positioning ring 51. The two ends of the telescopic rod 52 are respectively welded and fixed to the outer wall of the positioning ring 51 and the corresponding inner arc surface of the abutment block 11, and the screw rod 41 movably passes through the inner side of the positioning ring 51.

[0027] In the embodiment of the present application, since the telescopic rod 52 is evenly arranged on the outer wall of the positioning ring 51 around the circumference of the positioning ring 51, it can be ensured that the multiple abutment blocks 11 can be evenly arranged on the outer side of the positioning ring 51. When the abutment blocks 11 move to abut the inner wall of the pipe fitting 6, it can also be ensured that the multiple abutment blocks 11 can be evenly distributed on the inner wall of the pipe fitting 6, thereby improving the supporting effect of the abutment blocks 11 on the inner wall of the pipe fitting 6.

[0028] The implementation principle of the pipe inner wall support device applicable to the pipe testing machine of the embodiment of the present application is as follows: insert the plug 1 into the pipe 6 to be tested, rotate the second cone block 3 to make the second cone block 3 move axially along the screw 41, and when the first cone block 2 and the second cone block 3 are close to each other, the abutment block 11 is subjected to the force on the conical surfaces of the first cone block 2 and the second cone block 3, and moves in the direction away from the axis of the plug 1 until the outer arc surface of the abutment block 11 abuts against the inner wall of the pipe 6. In this way, the plug 1 of the present application can support the inner wall of pipes 6 of various specifications and models, and there is no need to make multiple models of plugs 1 to adapt to the corresponding pipes 6, which has the effect of reducing the test cost.

[0029] It should be understood by those skilled in the art that, although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A pipe inner wall support device suitable for a pipe testing machine, characterized in that: The invention comprises a plug (1), wherein the plug (1) is divided into a plurality of abutment blocks (11) with arc-shaped cross sections along its own circumference, a mounting channel (12) is formed between the plurality of abutment blocks (11), a first cone block (2) and a second cone block (3) are provided at two ends of the mounting channel (12) for sliding in opposite directions, the conical surfaces of the first cone block (2) and the second cone block (3) are respectively movably abutted against the edges of the two ends of the inner arc surface of the abutment block (11), and a driving member (4) for driving the first cone block (2) and the second cone block (3) to move is provided in the mounting channel (12).

2. A pipe inner wall support device suitable for a pipe testing machine according to claim 1, characterized in that: The driving member (4) comprises a screw rod (41) which moves through the installation channel (12); the first cone block (2) is fixedly arranged at one end of the screw rod (41); and the second cone block (3) is threadedly connected to the other end of the screw rod (41).

3. The pipe inner wall support device applicable to the pipe testing machine according to claim 2, characterized in that: The outer wall of one end of the plug (1) close to the first cone block (2) is configured as a hemispherical surface.

4. The pipe inner wall support device applicable to the pipe testing machine according to claim 1, characterized in that: The abutment block (11) is a metal sheet with elasticity.

5. The pipe inner wall support device applicable to the pipe testing machine according to claim 4, characterized in that: The end of the abutment block (11) is provided with an arc chamfer (111) for fitting with the conical surface of the first cone block (2) / the second cone block (3).

6. The pipe inner wall support device applicable to the pipe testing machine according to claim 2, characterized in that: A connecting piece (5) is provided between the plurality of abutment blocks (11), the connecting piece (5) comprising a positioning ring (51) and a plurality of telescopic rods (52), the positioning ring (51) is coaxially inserted into the installation channel (12), the plurality of telescopic rods (52) are evenly arranged on the outer wall of the positioning ring (51) in the circumferential direction around the positioning ring (51), the two ends of the telescopic rod (52) are respectively fixedly connected to the outer wall of the positioning ring (51) and the inner arc surface of the corresponding abutment block (11), and the screw rod (41) movably passes through the inner side of the positioning ring (51).

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