Bending resistance detection device for seamless stainless steel pipe

Abstract

The invention relates to a bending resistance detection device for seamless stainless steel pipes, which is applied to the field of physical analysis, a plurality of slidable pressing tables are arranged at the lower end of a cross rod, batch bending resistance detection operation on a plurality of steel pipes can be realized, and the bending resistance of the steel pipes can be detected through rotational connection between the cross rod and an output shaft of an air cylinder. On the basis that the air cylinder drives the transverse rod to move downwards to extrude the steel pipes, the transverse rod is endowed with the function of rotating around the air cylinder, so that the position of the pressing table in the length direction of the steel pipes is adjusted, transposition detection of the multiple steel pipes is achieved, and the sufficiency and comprehensiveness of steel pipe bending resistance detection are effectively improved; and the upper ends of the steel pipes are positioned on the same horizontal plane, so that synchronous detection of a plurality of steel pipes with different sizes can be realized, and the application range of the device is further expanded.

Description

Technical Field

[0001] The invention relates to a detection device, in particular to a bending resistance detection device for seamless stainless steel pipes applied in the field of physical analysis. Background Art

[0002] Stainless steel seamless pipe is a long steel strip with a hollow cross-section and no seams around it. The thicker the wall thickness of the product, the more economical and practical it is. The thinner the wall thickness, the higher the processing cost. After the stainless steel pipe is produced, it is necessary to sample and test its mechanical properties, such as hardness, tensile strength and bending strength.

[0003] For example, the specification of Chinese patent CN109406260B discloses a bending strength detection device for a stainless steel hollow pipe. By setting a support point in the middle of the steel pipe, fixing one end and applying pressure on the other end, the pressure applied to the steel pipe when plastic bending occurs is detected. The operation is simple, the detection speed is fast, the steel pipe is highly stable during detection, and it is not prone to danger, which helps to improve the detection efficiency. The pressure applied to the steel pipe is detected by a pressure sensor, and the pressure data is displayed by a single-chip microcomputer, which is convenient for viewing and recording the pressure data, and can more accurately understand the bending strength of the steel pipe, and the detection result is more accurate.

[0004] For another example, the specification of Chinese patent CN220399151U discloses a device for detecting the bending strength of a stainless steel pipe. By pulling the set pull rod, the restriction on the position of the control block is released, and then the positions of the two fixing rings can be changed according to the length of the steel pipe to be detected, so that the two fixing rings are close to or far away from each other, adapted to the length of the steel pipe to be detected, and convenient for detecting steel pipes of different lengths. After the steel pipe is fixed, the position of the steel pipe can be changed by moving the two fixing rings at the same time, thereby changing the detection position, so that the results of the bending strength test are more accurate in the detection of multiple different positions.

[0005] However, the existing devices for testing the bending resistance of stainless steel pipes have a limited scope of application. Most of them test a single steel pipe separately, and it is difficult to simultaneously test multiple steel pipes of different sizes. When the testing position needs to be changed, most of them need to move the steel pipe and re-fix it, which is cumbersome to operate. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing device for testing the bending resistance of stainless steel pipes has a limited scope of application and it is difficult to achieve simultaneous testing of multiple steel pipes of different sizes.

[0007] In order to solve the above problems, the present invention provides a bending resistance testing device for seamless stainless steel pipes, including a base and a top plate, a plurality of evenly distributed pillars are fixedly connected between the base and the top plate, a cylinder is fixedly connected to the lower end of the top plate, a boss is movably connected to the output shaft of the cylinder, a cross bar is fixedly connected to the lower end of the boss, a plurality of pressing platforms for extruding different steel pipes are slidably connected to the lower end of the cross bar, a plurality of telescopic partitions are fixedly connected to the upper end of the base, and the plurality of telescopic partitions and the plurality of pressing platforms are spaced apart, a pair of vertical plates are slidably connected to the upper end of the base, the pair of vertical plates are respectively located on both sides of the cross bar and close to different ends of the cross bar, a pair of limit seats are provided on the upper side of the base, and the limit seats are fixedly connected between an adjacent pair of pillars.

[0008] As a further supplement to the present application, the outer end of the output shaft of the cylinder is fixedly connected to a limit ring, and the output shaft of the cylinder and the limit ring both pass through the upper end of the boss and are rotatably connected to the inside thereof.

[0009] As a further supplement to the present application, a pair of electric telescopic rods are fixedly connected to the upper end of the base, and the pair of electric telescopic rods are respectively located on one side of a pair of vertical plates away from the horizontal bar, the output ends of the electric telescopic rods are in contact with the vertical plates, a sliding groove is opened at the upper end of the base, and a T-shaped slider is fixedly connected to the lower end of the vertical plate, and the T-shaped slider is slidably connected to the inside of the sliding groove.

[0010] As a further supplement to the present application, the pressing platform includes an upper pressing plate, the upper end of which is fixedly connected to a limiting rod, a lower pressing plate is provided on the lower side of the upper pressing plate, the upper end of the lower pressing plate is fixedly connected to a sliding rod, a through hole is provided on the upper pressing plate, the upper end of the sliding rod is slidably connected to the inside of the through hole, and a compression spring movably mounted on the outside of the sliding rod is fixedly connected between the upper pressing plate and the lower pressing plate.

[0011] As a further supplement to the present application, a T-shaped slide is provided at the lower end of the cross bar, and the upper end of the limit rod is slidably connected to the inside of the T-shaped slide.

[0012] As a further supplement to the present application, the telescopic partition includes an outer plate frame fixedly connected to the upper end of the base, an inner plate is slidably connected to the inside of the outer plate frame, and the upper end of the inner plate extends to the outside of the outer plate frame, and the lower end of the inner plate is fixedly connected to the inner bottom surface of the outer plate frame with a compression spring 2.

[0013] As a further supplement to the present application, the outer surface of the inner plate is coated with a magnetic coating, a pair of magnets are fixedly connected to the inside of the upper pressure plate, and the pair of magnets are respectively located at both ends of the upper pressure plate close to the telescopic partition.

[0014] As a further supplement to the present application, the limit seat includes a U-shaped plate fixedly connected to the pillar, a plurality of pads are provided on the lower side of the U-shaped plate, a pair of screws are fixedly connected to the upper end of the pads, and the upper ends of the screws pass through the U-shaped plate upward and are threadedly connected to nuts.

[0015] As a further supplement to the present application, a soft pad is fixedly connected to the lower end of the U-shaped plate, a splint is provided at the lower end of the soft pad, a slide plate is fixedly connected to both ends of the splint, an inner groove is provided on a pair of inner side walls of the U-shaped plate, a pair of slide plates are slidably connected to the inside of the pair of inner grooves, a screw rod movably passes through the inside of the soft pad and the splint, and a steel pipe is located between the pad and the splint.

[0016] As a further supplement to the present application, both ends of the splint are fixedly connected with extension pieces, the extension pieces are attached to the outer surface of the U-shaped plate, and bolts are threadedly connected between the extension pieces and the U-shaped plate.

[0017] In summary, the present application can realize batch bending resistance testing operations on multiple steel pipes by arranging multiple sliding pressure platforms at the lower end of the cross bar, and through the rotational connection between the cross bar and the cylinder output shaft, on the basis of realizing that the cylinder drives the cross bar to move downward to extrude the steel pipe, the cross bar is given the function of rotating around the cylinder, thereby adjusting the position of the pressure platform in the length direction of the steel pipe, realizing the displacement testing of multiple steel pipes, and effectively improving the adequacy and comprehensiveness of the testing of the bending resistance of the steel pipe. In addition, by fixing steel pipes of different sizes and making their upper ends on the same horizontal plane, it is also possible to realize synchronous testing of multiple steel pipes of different sizes, further improving the scope of application of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The first embodiment of the present application is a three-dimensional Figure 1 ;

[0019] Figure 2 The first embodiment of the present application is a three-dimensional Figure 2 ;

[0020] Figure 3 The local stereoscopic view of the first embodiment of the present application Figure 1 ;

[0021] Figure 4 This is a three-dimensional view of the crossbar of the first embodiment of the present application;

[0022] Figure 5 This is a three-dimensional diagram of the cylinder, cross bar, and press table of the first embodiment of the present application when disassembled;

[0023] Figure 6 This is a schematic diagram of the front structure of the first embodiment of this application. Figure 1 ;

[0024] Figure 7 This is a schematic diagram of the front structure of the first embodiment of this application. Figure 2 ;

[0025] Figure 8 This is a front structural schematic diagram of the telescopic partition according to the first embodiment of the present application;

[0026] Fig. 9 This is a schematic diagram of the top surface structure of the first embodiment of the present application when adjusting the detection position;

[0027] Fig.10 This is a three-dimensional diagram of the limiting seat of the first embodiment of the present application when in use;

[0028] Fig.11 This is an exploded view of the limit seat of the first embodiment of the present application;

[0029] Fig.12 This is a schematic diagram of the front structure of the limit seat of the first embodiment of the present application when in use Figure 1 ;

[0030] Fig.13 This is a schematic diagram of the front structure of the limit seat of the first embodiment of the present application when in use Figure 2 ;

[0031] Fig.14 This is a schematic diagram of the front structure of the limit seat of the second embodiment of the present application when in use.

[0032] Description of the numbers in the figure:

[0033] 1 base, 101 slide, 2 pillars, 3 top plate, 4 limit seat, 41 U-shaped plate, 4101 inner groove, 42 pad, 43 screw, 44 cushion, 45 splint, 46 extension piece, 47 slide plate, 5 cylinder, 501 limit ring, 6 boss, 7 cross bar, 701 T-shaped slide, 8 press table, 81 upper press plate, 82 limit rod, 83 lower press plate, 84 slide bar, 85 compression spring one, 86 magnet, 9 vertical plate, 10 electric telescopic rod, 11 telescopic partition, 1101 outer plate frame, 1102 inner plate, 1103 compression spring two. DETAILED DESCRIPTION

[0034] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0035] The first implementation method:

[0036] The present invention provides a bending resistance testing device for seamless stainless steel pipes. Figure 1, including a base 1 and a top plate 3, a plurality of evenly distributed pillars 2 are fixedly connected between the base 1 and the top plate 3, a cylinder 5 is fixedly connected to the lower end of the top plate 3, a boss 6 is movably connected to the output shaft of the cylinder 5, a cross bar 7 is fixedly connected to the lower end of the boss 6, a plurality of pressing platforms 8 for extruding different steel pipes are slidably connected to the lower end of the cross bar 7, a plurality of telescopic partitions 11 are fixedly connected to the upper end of the base 1, and the plurality of telescopic partitions 11 are distributed at intervals with the plurality of pressing platforms 8, a pair of vertical plates 9 are slidably connected to the upper end of the base 1, the pair of vertical plates 9 are respectively located on both sides of the cross bar 7 and are respectively close to different ends of the cross bar 7, a pair of limit seats 4 are provided on the upper side of the base 1, and the limit seats 4 are fixedly connected between an adjacent pair of pillars 2.

[0037] The outer end of the output shaft of the cylinder 5 is fixedly connected to the limit ring 501, and the output shaft of the cylinder 5 and the limit ring 501 both pass through the upper end of the boss 6 and are rotatably connected to the inside thereof. Through the cooperation of the above-mentioned structure, the boss 6 and the cross bar 7 can rotate horizontally around the cylinder 5, which is convenient for adjusting the contact position between the pressing platform 8 and the steel pipe (indicated by M in the figure) to achieve extrusion of different positions of the steel pipe, effectively improving the comprehensiveness of the bending resistance test. After determining the extrusion position of the pressing platform 8, the cylinder 5 is started. Through the downward extension of the cylinder 5, the boss 6 and the cross bar 7 can be pushed downward synchronously, thereby driving the pressing platform 8 to squeeze the steel pipe downward to test the bending resistance of the steel pipe.

[0038] A pair of electric telescopic rods 10 are fixedly connected to the upper end of the base 1, and the pair of electric telescopic rods 10 are respectively located on the side of a pair of vertical plates 9 away from the cross bar 7. The output end of the electric telescopic rod 10 is in contact with the vertical plate 9. A slide groove 101 is opened at the upper end of the base 1, and a T-shaped slider is fixedly connected to the lower end of the vertical plate 9. The T-shaped slider is slidably connected to the inside of the slide groove 101. Through the extension and retraction of the electric telescopic rod 10, the rotation of the cross bar 7 is conveniently controlled, thereby adjusting the extrusion position of the press platform 8 on the steel pipe.

[0039] The pressing platform 8 includes an upper pressing plate 81, the upper end of which is fixedly connected to a limiting rod 82, a lower pressing plate 83 is provided on the lower side of the upper pressing plate 81, the upper end of the lower pressing plate 83 is fixedly connected to a sliding rod 84, a through hole is provided on the upper pressing plate 81, the upper end of the sliding rod 84 is slidably connected to the inside of the through hole, a compression spring 85 movably sleeved on the outside of the sliding rod 84 is fixedly connected between the upper pressing plate 81 and the lower pressing plate 83, a T-shaped slide 701 is provided at the lower end of the cross bar 7, the upper end of the limiting rod 82 is slidably connected to the inside of the T-shaped slide 701, the lower pressing plate 83 is vertically distributed to the steel pipe, the upper pressing plate 81 and the lower pressing plate 83 have the same length and are larger than the diameter of the steel pipe, so as to facilitate extrusion detection of the steel pipe.

[0040] During the test, the cross bar 7 drives the multiple pressing platforms 8 to move downward at the same time until the lower pressing plate 83 contacts the steel pipe, and the cross bar 7 transmits the extrusion force to the upper pressing plate 81, and the upper pressing plate 81 presses the compression spring 85 downward, and the lower pressing plate 83 presses the steel pipe through the elastic force of the compression spring 85, so as to realize the batch bending resistance test of multiple steel pipes at the same time;

[0041] When it is necessary to adjust the extrusion position of the pressing table 8 and the steel pipe, first start the cylinder 5 to drive the cross bar 7 to move up, suspend the extrusion of the steel pipe, and then start a pair of electric telescopic rods 10 to extend and retract the pair of electric telescopic rods 10 respectively. The extended electric telescopic rod 10 will push the corresponding vertical plate 9 to move forward, and the vertical plate 9 will generate a thrust on one end of the cross bar 7. At the same time, due to the cooperation between the limit ring 501 and the boss 6, the cross bar 7 rotates around the cylinder 5, and the other end of the cross bar 7 pushes the other vertical plate 9 to move. At the same time, the other electric telescopic rod 10 retracts, and the vertical plate 9 corresponding to it is in a free state, which is not easy to hinder the rotation of the other end of the cross bar 7, thereby smoothly realizing the cross bar 7. During the rotation process of rod 7, pressing platform 8 rotates synchronously with cross bar 7, but the rotation of pressing platform 8 is restricted by the limiting action of adjacent telescopic partition 11, and pressing platform 8 slides along T-shaped slideway 701, and the whole is in a state of moving along the length direction of steel pipe, thereby changing the extrusion position of steel pipe, and then starting cylinder 5 again to drive cross bar 7 and pressing platform 8 to move down to perform extrusion test on steel pipe. Therefore, through the above operation, there is no need to move and fix the steel pipe again. By starting electric telescopic rod 10, the position of pressing platform 8 in the length direction of steel pipe can be adjusted, and transposition test of multiple steel pipes can be realized, which effectively improves the adequacy and comprehensiveness of the test of bending resistance of steel pipe.

[0042] The telescopic partition 11 includes an outer plate frame 1101 fixedly connected to the upper end of the base 1, an inner plate 1102 is slidably connected inside the outer plate frame 1101, and the upper end of the inner plate 1102 extends to the outside of the outer plate frame 1101, and the lower end of the inner plate 1102 is fixedly connected to the inner bottom surface of the outer plate frame 1101 by a compression spring 1103, and the outer surface of the inner plate 1102 is coated with a magnetic coating, and a pair of magnets 86 are fixedly connected inside the upper pressing plate 81, and the pair of magnets 86 are respectively located at the two ends of the upper pressing plate 81 near the telescopic partition 11, and the telescopic partition 11 is spaced apart from the pressing platform 8, that is, the telescopic partition 11 is spaced apart from the steel pipe. The telescopic partition 11 has a limiting effect on the press platform 8, so that the press platform 8 can only move along the length direction of the steel pipe to adjust the extrusion position, and when the press platform 8 and the cross bar 7 are in the same horizontal state, the inner plate 1102 and the side end of the press platform 8 are in a state of approaching fit, and during the movement of the press platform 8, the magnetic attraction of the magnet 86 and the magnetic coating can keep the press platform 8 in the above state, which is convenient for extruding the steel pipe. In addition, through the up and down telescopic effect of the telescopic partition 11 itself, it can adapt to the up and down movement of the cross bar 7, and it is not easy to cause obstacles to the downward movement of the cross bar 7, thereby smoothly realizing the anti-bending detection process.

[0043] The limiting seat 4 includes a U-shaped plate 41 fixedly connected to the pillar 2, a plurality of pads 42 are provided on the lower side of the U-shaped plate 41, a pair of screws 43 are fixedly connected to the upper end of the pad 42, the upper end of the screw 43 upwardly penetrates the U-shaped plate 41 and is threadedly connected with a nut, a soft pad 44 is fixedly connected to the lower end of the U-shaped plate 41, a clamping plate 45 is provided at the lower end of the soft pad 44, and a slide plate 47 is fixedly connected to both ends of the clamping plate 45, and a pair of inner side walls of the U-shaped plate 41 are provided with inner grooves 4101, and a pair of slide plates 47 slide It is movably connected to the inside of a pair of inner grooves 4101, and the screw 43 movably passes through the inside of the soft pad 44 and the splint 45. The steel pipe is located between the pad 42 and the splint 45. The ends of the pad 42 and the splint 45 that are close to each other are fixedly connected with friction pads to increase the friction between the steel pipe and the two, thereby improving the stability of the steel pipe. Extension pieces 46 are also fixedly connected at both ends of the splint 45. The extension piece 46 is in contact with the outer surface of the U-shaped plate 41, and bolts are threadedly connected between the extension piece 46 and the U-shaped plate 41.

[0044] When installing the steel pipe, the extension piece 46 and the U-shaped plate 41 are in a state of bolt connection, so that the clamping plate 45 is in a fixed state, and the steel pipe is inserted into a pair of limit seats 4 in turn, and passes through the area between the pad 42 and the clamping plate 45. After the insertion is completed, the pad 42 is moved upward, and the pad 42 drives the screw 43 to move upward along the inside of the U-shaped plate 41 until the upper end of the steel pipe contacts the lower end of the clamping plate 45. Then, the nut is set on the upper end of the screw 43 and tightened downward to fix the screw 43 on the U-shaped plate 41, thereby fixing the steel pipe between the pad 42 and the clamping plate 45, and because the pad The plate 42 is fixed to the lower end of the steel pipe, and the pressing force of the pressing platform 8 on the steel pipe is also vertically downward, so that the steel pipe is in a stable state to a certain extent during the squeezing test process; after the steel pipe is fixed, the bolts on the extension piece 46 are removed to make the clamping plate 45 movable up and down. In this way, when the unqualified steel pipe is bent under the squeezing of the pressing platform 8, the two ends of the steel pipe will tilt upward to a certain extent (N in the figure represents the bent steel pipe), pushing the clamping plate 45 to slide upward, and the soft pad 44 is squeezed, so that the end of the steel pipe is not easily blocked by hardness, and the steel pipe that has not been bent is a qualified steel pipe.

[0045] Second implementation method:

[0046] The first embodiment realizes the synchronous detection of multiple steel pipes and can change the detection position of the steel pipes. Based on the first embodiment, this embodiment further improves the scope of application of the present application, that is, it can simultaneously perform bending resistance detection on steel pipes of different sizes, and adopt the same operation as the first embodiment to fix steel pipes of different sizes between the pad 42 and the clamp 45, wherein the pad 42 corresponding to the larger steel pipe (indicated by H in the figure) is in a lower position, and the upper ends of the steel pipes of different sizes are in contact with the lower end of the clamp 45, so that the upper ends of all steel pipes are in the same horizontal position, which is convenient for the synchronous extrusion of the contact press 8.

[0047] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A bending resistance testing device for seamless stainless steel pipes, comprising a base (1) and a top plate (3), wherein a plurality of evenly distributed pillars (2) are fixedly connected between the base (1) and the top plate (3), and a cylinder (5) is fixedly connected to the lower end of the top plate (3), characterized in that: A boss (6) is movably connected to the output shaft of the cylinder (5), a cross bar (7) is fixedly connected to the lower end of the boss (6), a plurality of press plates (8) for pressing different steel pipes are slidably connected to the lower end of the cross bar (7), a plurality of telescopic partitions (11) are fixedly connected to the upper end of the base (1), and the plurality of telescopic partitions (11) and the plurality of press plates (8) are spaced apart, a pair of vertical plates (9) are slidably connected to the upper end of the base (1), the pair of vertical plates (9) are respectively located on both sides of the cross bar (7) and are respectively close to different ends of the cross bar (7), and a pair of limit seats (4) are provided on the upper side of the base (1), and the limit seats (4) are fixedly connected between an adjacent pair of pillars (2).

2. The bending resistance testing device for seamless stainless steel pipe according to claim 1 is characterized in that: The outer end of the output shaft of the cylinder (5) is fixedly connected to a limiting ring (501), and the output shaft of the cylinder (5) and the limiting ring (501) both penetrate the upper end of the boss (6) and are rotatably connected to the inside thereof.

3. The bending resistance testing device for seamless stainless steel pipe according to claim 1 is characterized in that: A pair of electric telescopic rods (10) are fixedly connected to the upper end of the base (1), and the pair of electric telescopic rods (10) are respectively located on a side of a pair of vertical plates (9) away from the cross bar (7), and the output ends of the electric telescopic rods (10) are in contact with the vertical plates (9). A slide groove (101) is provided at the upper end of the base (1), and a T-shaped slider is fixedly connected to the lower end of the vertical plate (9), and the T-shaped slider is slidably connected to the inside of the slide groove (101).

4. The bending resistance testing device for seamless stainless steel pipe according to claim 1, characterized in that: The press platform (8) comprises an upper press plate (81), the upper end of the upper press plate (81) is fixedly connected to a limit rod (82), a lower press plate (83) is provided on the lower side of the upper press plate (81), the upper end of the lower press plate (83) is fixedly connected to a slide rod (84), a through hole is provided on the upper press plate (81), the upper end of the slide rod (84) is slidably connected to the inside of the through hole, and a compression spring (85) movably sleeved on the outside of the slide rod (84) is fixedly connected between the upper press plate (81) and the lower press plate (83).

5. The bending resistance testing device for seamless stainless steel pipe according to claim 4 is characterized in that: A T-shaped slideway (701) is provided at the lower end of the crossbar (7), and the upper end of the limit rod (82) is slidably connected to the inside of the T-shaped slideway (701).

6. The bending resistance testing device for seamless stainless steel pipe according to claim 4, characterized in that: The telescopic partition (11) comprises an outer plate frame (1101) fixedly connected to the upper end of the base (1); an inner plate (1102) is slidably connected to the interior of the outer plate frame (1101); the upper end of the inner plate (1102) extends to the outside of the outer plate frame (1101); and a second compression spring (1103) is fixedly connected to the inner bottom surface of the outer plate frame (1101) at the lower end of the inner plate (1102).

7. The bending resistance testing device for seamless stainless steel pipe according to claim 6, characterized in that: The outer surface of the inner plate (1102) is coated with a magnetic coating, and a pair of magnets (86) are fixedly connected to the interior of the upper pressing plate (81), and the pair of magnets (86) are respectively located at two ends of the upper pressing plate (81) close to the telescopic partition (11).

8. The bending resistance testing device for seamless stainless steel pipe according to claim 1, characterized in that: The limit seat (4) comprises a U-shaped plate (41) fixedly connected to the pillar (2); a plurality of pads (42) are provided on the lower side of the U-shaped plate (41); a pair of screw rods (43) are fixedly connected to the upper ends of the pads (42); the upper ends of the screw rods (43) penetrate the U-shaped plate (41) upwards and are threadedly connected to nuts.

9. The bending resistance testing device for seamless stainless steel pipe according to claim 8, characterized in that: The lower end of the U-shaped plate (41) is fixedly connected to a cushion (44), the lower end of the cushion (44) is provided with a clamping plate (45), both ends of the clamping plate (45) are fixedly connected to a slide plate (47), a pair of inner side walls of the U-shaped plate (41) are provided with inner grooves (4101), a pair of the slide plates (47) are slidably connected to the inside of the pair of inner grooves (4101), the screw rod (43) movably penetrates the inside of the cushion (44) and the clamping plate (45), and the steel pipe is located between the cushion plate (42) and the clamping plate (45).

10. The bending resistance testing device for seamless stainless steel pipe according to claim 9, characterized in that: The two ends of the clamping plate (45) are also fixedly connected with extension pieces (46), the extension piece (46) is in contact with the outer surface of the U-shaped plate (41), and bolts are threadedly connected between the extension piece (46) and the U-shaped plate (41).

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