Pipe testing device

Abstract

This invention discloses a pipe testing device, relating to the field of pipe testing technology. The pipe testing device includes a first frame, a second frame, a first clamping unit, a second clamping unit, and a drive assembly. The first frame includes a first upright plate. The second frame is adjustablely positioned on the first frame and includes a second upright plate. The first clamping unit includes a first shaft rotatably mounted on the first upright plate and a plurality of first clamping plates spaced circumferentially along the first shaft. The radial position of the first clamping plates along the first shaft is adjustable for supporting the inner wall of the pipe to be tested. The second clamping unit includes a second shaft rotatably mounted on the second upright plate and a plurality of second clamping plates spaced circumferentially along the second shaft. The radial position of the second clamping plates along the second shaft is adjustable for supporting the inner wall of the pipe to be tested. The drive assembly includes a drive motor for driving the first shaft and / or the second shaft to rotate. The pipe testing device of this invention is easy to operate and improves the efficiency of pipe testing.

Description

Technical Field

[0001] This invention relates to the field of pipe testing technology, and more specifically to a pipe testing device. Background Technology

[0002] Zirconium alloy tubing is a high-performance metallic material with zirconium as its main component. It possesses excellent corrosion resistance, good mechanical properties, and a low thermal neutron absorption cross section, making it widely used in nuclear reactor fuel cladding tubes, chemical equipment, and special corrosion-resistant pipelines. The testing process for zirconium alloy tubing primarily ensures that its dimensional accuracy, mechanical properties, and microstructure meet nuclear or industrial-grade standards. This typically includes non-destructive testing, dimensional measurement systems, mechanical property testing machines, and metallographic analysis equipment. Some high-end systems are also equipped with residual stress analyzers and hydride orientation detectors to meet the evaluation requirements for special properties such as hydrogen-induced delayed cracking in nuclear-grade zirconium tubing. These devices work together to ensure the safety and reliability of zirconium alloy tubing in critical scenarios such as nuclear reactors.

[0003] In related technologies, when performing non-destructive testing on pipes, it is impossible to fix pipes of different diameters. The tools for fixing the pipes need to be changed frequently, which is cumbersome and greatly reduces the efficiency of pipe testing. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention provide a pipe testing device that is easy to operate and improves the efficiency of pipe testing.

[0006] The pipe testing device of the present invention includes:

[0007] The first frame includes a first upright plate; The second frame is assembled to the first frame and its position is adjustable in the left and right directions. The second frame includes a second upright plate. The first clamping unit includes a first shaft and a plurality of first clamping plates. The first shaft is rotatably mounted on the first upright plate and located on the right side of the first upright plate. The plurality of first clamping plates are spaced apart circumferentially along the first shaft and their radial positions are adjustable. The first clamping plates are used to support the inner wall of the pipe to be tested. The second clamping unit includes a second shaft and a plurality of second clamping plates. The second shaft is rotatably mounted on the second vertical plate and located on the left side of the second vertical plate. The plurality of second clamping plates are spaced apart circumferentially along the second shaft and their radial positions are adjustable. The second clamping plates are used to support the inner wall of the pipe to be tested. A drive assembly, the drive assembly including a drive motor, the drive motor being disposed on the first frame and / or the second frame for driving the first shaft and / or the second shaft to rotate.

[0008] The pipe testing device of this invention, by setting a first frame and a second frame, facilitates the adjustment of the positions of the first clamping unit and the second clamping unit, making it easy to install the pipe to be tested. It is also suitable for testing pipes of different lengths. By setting a first clamping plate on the first axis and a second clamping plate on the second axis, it is easy to fix the pipe. Furthermore, the clamping of pipes of different diameters can be achieved by moving the first clamping plate radially relative to the first axis and the second clamping plate radially relative to the second axis. The operation is convenient and the efficiency of pipe testing is improved.

[0009] In some possible implementations, the drive assembly further includes a third shaft and a fourth shaft, the third shaft being rotatably mounted on the first frame and drivingly engaged with the first shaft, the fourth shaft being rotatably mounted on the second frame and drivingly engaged with the second shaft, the third shaft being plugged into the fourth shaft and having a circumferential anti-rotation engagement along the third shaft, and the drive motor drivingly engaged with the third shaft or the fourth shaft.

[0010] In some possible implementations, the first frame includes a first frame with a first cavity extending in a left-right direction, and the third axis is rotatably disposed in the first cavity. The second frame includes a second frame with a second cavity extending in a left-right direction, and the fourth axis is rotatably disposed in the second cavity. The second frame is slidably assembled into the first cavity in a left-right direction.

[0011] In some possible implementations, the drive motor is fixedly disposed in the first cavity, the output end of the drive motor is provided with a first gear, and the third shaft is provided with a second gear, the first gear meshing with the second gear.

[0012] In some possible implementations, the drive assembly includes a fifth shaft that extends in a vertical direction and whose two ends are respectively connected to the first shaft and the third shaft. And / or, the drive assembly includes a sixth shaft that extends in a vertical direction and whose two ends are respectively connected to the second shaft and the fourth shaft.

[0013] In some possible implementations, a third gear is provided at the left end of the first shaft, and a fourth gear is provided on the first vertical plate that is connected to the fifth shaft in a transmission manner, wherein the third gear and the fourth gear mesh with each other.

[0014] In some possible implementations, the first frame has a first hole, the second frame has a second hole, and the pipe inspection device further includes a fixing bolt, which is used to pass through both the first hole and the second hole simultaneously, and the fixing bolt is threadedly engaged with the first hole and / or the second hole.

[0015] In some possible implementations, the first clamping plate is an arc-shaped plate.

[0016] In some possible implementations, a protective pad is provided on the side of the first clamping plate away from the first axis.

[0017] In some possible implementations, the first clamping unit includes a first guide rod and a first direct drive unit disposed corresponding to the first clamping plate. The first guide rod is slidably mounted on the first shaft along the first shaft, and the other end of the first guide rod is fixedly connected to the first guide rod. The first direct drive unit is fixedly disposed on the first shaft, and the movable end of the first direct drive unit is fixedly connected to the first clamping plate to drive the first clamping plate to move radially along the first shaft.

[0018] In some possible implementations, the first shaft is provided with a first mounting cavity extending radially, and the first direct drive unit is disposed in the first mounting cavity.

[0019] In some possible implementations, each of the first clamping plates is provided with two first guide rods, which are symmetrically arranged about the first direct drive unit.

[0020] In some possible implementations, the first direct drive unit is configured as an electric telescopic rod, a hydraulic telescopic rod, or a pneumatic telescopic rod. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the pipe testing device according to an embodiment of the present invention.

[0022] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0023] Figure 3 This is a schematic diagram of the structure of the first clamping unit in the pipe inspection device according to an embodiment of the present invention.

[0024] Figure label: First frame 1; First upright plate 11; First frame 12; First cavity 13; First hole 14; Second frame 2; second upright plate 21; second frame 22; second cavity 23; second hole 24; First clamping unit 3; first shaft 31; first clamping plate 32; protective pad 33; first guide rod 34; first direct drive unit 35; first mounting cavity 36; Second clamping unit 4; second shaft 41; second clamping plate 42; Drive assembly 5; drive motor 51; third shaft 52; fourth shaft 53; first gear 54; second gear 55; fifth shaft 56; sixth shaft 57; fifth gear 58; sixth gear 59; Fixing bolt 6; Third gear 7; Fourth gear 8. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, the pipe inspection device of this embodiment includes a first frame 1, a second frame 2, a first clamping unit 3, a second clamping unit 4, and a driving assembly 5. The length direction of the first frame 1 is defined as the left-right direction, and the height direction of the first frame 1 is defined as the up-down direction.

[0027] The first frame 1 includes a first upright plate 11. The second frame 2 is assembled on the first frame 1 and its position is adjustable in the left and right directions. The second frame 2 includes a second upright plate 21. The first clamping unit 3 includes a first shaft 31 and a plurality of first clamping plates 32. The first shaft 31 is rotatably disposed on the first upright plate 11 and located on the right side of the first upright plate 11. The plurality of first clamping plates are spaced apart circumferentially along the first shaft 31 and their positions are adjustable in the radial direction along the first shaft 31. The first clamping plates are used to support the inner wall of the pipe to be tested. The second clamping unit 4 includes a second shaft 41 and a plurality of second clamping plates 42. The second shaft 41 is rotatably disposed on the second upright plate 21 and located on the left side of the second upright plate 21. The plurality of second clamping plates are spaced apart circumferentially along the second shaft 41 and their positions are adjustable in the radial direction along the second shaft 41. The second clamping plates are used to support the inner wall of the pipe to be tested. The driving assembly 5 includes a driving motor 51. The driving motor 51 is disposed on the first frame 1 and / or the second frame 2 to drive the first shaft 31 and / or the second shaft 41 to rotate.

[0028] In use, the pipe testing device of this invention supports the device on a working platform or working surface via a first frame 1. The second frame 2 is moved to adjust the distance between the first clamping plate 32 and the second clamping plate 42, so that the distance between the close ends of the first clamping plate 32 and the second clamping plate 42 is greater than the length of the pipe to be tested. The pipe groove to be tested is fitted onto multiple first clamping plates 32. The second frame 2 is moved so that multiple second clamping plates 42 are inserted into the other end of the pipe to be tested. Multiple first clamping plates 32 are driven to move away from the first shaft 31, and multiple second clamping plates 42 are driven to move away from the second shaft 41, until the first clamping plates 32 and the second clamping plates 42 respectively abut against the inner wall of the pipe to be tested. The drive motor 51 drives the first shaft 31 and / or the second shaft 41 to rotate, thereby driving the first clamping plates 32 and the second clamping plates 42 to rotate, realizing the clamping and rotation of the pipe to be tested, and thus performing non-destructive testing on the side wall of the pipe to be tested.

[0029] The pipe testing device of the present invention, by setting a first frame 1 and a second frame 2, facilitates the adjustment of the positions of the first clamping unit 3 and the second clamping unit 4, making it easy to install the pipe to be tested. It is also suitable for testing pipes of different lengths. By setting a first clamping plate 32 on the first axis 31 and a second clamping plate 42 on the second axis 41, it is easy to fix the pipe. Furthermore, the clamping of pipes of different diameters can be achieved by the radial movement of the first clamping plate 32 relative to the first axis 31 and the radial movement of the second clamping plate 42 relative to the second axis 41. The device is easy to operate and improves the efficiency of pipe testing.

[0030] The drive motor 51 is mounted on the first frame 1 and / or the second frame 2 to drive the first shaft 31 and / or the second shaft 41 to rotate. This can be understood as follows: the drive motor 51 is provided on the first frame 1 or the second frame 2. When the drive motor 51 is mounted on the first frame 1, the drive motor 51 drives the first shaft 31 to rotate, and the second shaft 41 rotates under the drive of the pipe to be tested. Alternatively, the drive motor 51 drives the first shaft 31 and the second shaft 41 to rotate simultaneously. When the drive motor 51 is mounted on the second frame 2, the drive motor 51 drives the second shaft 41 to rotate, and the first shaft 31 rotates under the drive of the pipe to be tested. Alternatively, the drive motor 51 drives the first shaft 31 and the second shaft 41 to rotate simultaneously. Alternatively, there may be two drive motors 51, each with a first frame 1 and a second frame 2, which drive the corresponding first shaft 31 or second shaft 41 to rotate.

[0031] In some possible implementations, the first shaft 31 is rotatably mounted on the first vertical plate 11 via a turntable and a ball bearing.

[0032] In some possible implementations, such as Figure 1 As shown, the drive assembly 5 also includes a third shaft 52 and a fourth shaft 53. The third shaft 52 is rotatably mounted on the first frame 1 and is in drive engagement with the first shaft 31. The fourth shaft 53 is rotatably mounted on the second frame 2 and is in drive engagement with the second shaft 41. The third shaft 52 and the fourth shaft 53 are plugged into each other and are anti-rotationally engaged along the circumference of the third shaft 52. The drive motor 51 is in drive engagement with either the third shaft 52 or the fourth shaft 53.

[0033] In this embodiment, by setting a third shaft 52 and a fourth shaft 53, when the first frame 1 and the second frame 2 move relative to each other, the third shaft 52 and the fourth shaft 53 will undergo relative displacement. Under the condition of the anti-rotation engagement of the third shaft 52 and the fourth shaft 53, force can be transmitted between the third shaft 52 and the fourth shaft 53. Under the action of the drive motor 51, the third shaft 52 and the fourth shaft 53 can rotate simultaneously, thereby causing the first shaft 31 and the second shaft 41 to rotate simultaneously, improving the reliability and stability of the pipe under test when rotating for testing. Furthermore, by setting one drive motor 51 for the third shaft 52 or the fourth shaft 53, two clamping units can be driven to rotate simultaneously, simplifying the structure and facilitating installation and operation.

[0034] In some possible implementations, the end of the third shaft 52 is connected to the first shaft 31 via a gear set, sprocket set, or belt set.

[0035] In some possible implementations, the end of the fourth shaft 53 is connected to the second shaft 41 via a gear set, sprocket set, or belt set.

[0036] In some possible implementations, such as Figure 1 As shown, the first frame 1 includes a first frame 12, the first frame 12 is provided with a first cavity 13 extending in the left and right direction, and a third shaft 52 is rotatably disposed in the first cavity 13. The second frame 2 includes a second frame 22, the second frame 22 is provided with a second cavity 23 extending in the left and right direction, a fourth shaft 53 is rotatably disposed in the second cavity 23, and the second frame 22 is slidably assembled in the first cavity 13 in the left and right direction.

[0037] In this embodiment, by setting a first frame 12 and a second frame 22, it is convenient to assemble the first frame 1 and the second frame 2. The first cavity 13 can constrain the movement of the second frame 22 and improve the connection reliability and adjustment stability between the first frame 12 and the second frame 22. At the same time, the second cavity 23 is set to facilitate the protection of the third axis 52 and the fourth axis 53, and to facilitate the adjustment of the insertion depth between the third axis 52 and the fourth axis 53, which is safe and reliable.

[0038] In some possible implementations, such as Figure 1As shown, the drive motor 51 is fixedly mounted in the first cavity 13. The output end of the drive motor 51 is provided with a first gear 54, and the third shaft 52 is provided with a second gear 55. The first gear 54 and the second gear 55 mesh with each other. In this embodiment, the drive motor 51 is installed inside the first cavity 13, facilitating the transmission connection between the drive motor 51 and the third shaft 52. The transmission between the drive motor 51 and the third shaft 52 is achieved through the first gear 54 and the second gear 55, resulting in reliable transmission and high stability.

[0039] In some possible implementations, such as Figure 1 As shown, the drive assembly 5 includes a fifth shaft 56, which extends in the vertical direction. The two ends of the fifth shaft 56 are respectively connected to the first shaft 31 and the third shaft 52 for transmission. By setting the fifth shaft 56, it is convenient to increase the distance between the first shaft 31 and the third shaft 52, so as to facilitate the installation of the pipe to be tested, and it is applicable to pipes of different diameters.

[0040] In some possible implementations, one end of the fifth shaft 56 is driven by the third shaft 52 via a gear set, and the other end of the fifth shaft 56 is driven by the first shaft 31 via a gear set.

[0041] In some possible implementations, such as Figure 1 As shown, the drive assembly 5 includes a sixth shaft 57, which extends in the vertical direction. The two ends of the sixth shaft 57 are respectively connected to the second shaft 41 and the fourth shaft 53 for transmission. By setting the sixth shaft 57, it is easy to increase the distance between the second shaft 41 and the fourth shaft 53, so as to facilitate the installation of the pipe to be tested, and it is applicable to pipes of different diameters.

[0042] In some possible implementations, one end of the sixth shaft 57 is driven by the fourth shaft 53 via a gear set, and the other end of the sixth shaft 57 is driven by the second shaft 41 via a gear set.

[0043] In some possible implementations, such as Figure 1 and Figure 2 As shown, a third gear 7 is provided at the left end of the first shaft 31, and a fourth gear 8 is rotatably provided on the first vertical plate 11 and is connected to the fifth shaft 56 for transmission. The third gear 7 and the fourth gear 8 mesh with each other.

[0044] In this embodiment, the third gear 7 and the fourth gear 8 are provided to improve the reliability and stability of driving the first shaft 31 to rotate. By controlling the rotation speed of the first shaft 31 through the third gear 7 and the fourth gear 8, the reliability of the test of the pipe material is improved.

[0045] In some possible implementations, a fifth gear 58 is coaxially and fixedly mounted on the fourth gear 8, and a sixth gear 59 is provided at the end of the fifth shaft 56, with the fifth gear 58 and the sixth gear 59 meshing together.

[0046] In some possible implementations, such as Figure 1 As shown, the first frame 12 is provided with a first hole 14, and the second frame 22 is provided with a second hole 24. The first hole 14 and the second hole 24 are both provided with a fixing bolt 6. The fixing bolt 6 is threadedly engaged with the first hole 14 and / or the second hole 24. By providing the first hole 14 and the second hole 24, it is convenient to install the fixing bolt 6 to fix the first frame 12 and the second frame 22. The threaded engagement of the fixing bolt 6 with the first hole 14 and / or the second hole 24 can improve the connection reliability between the fixing bolt 6 and the first frame 12 and / or the second frame 22, and further improve the fixing effect of the fixing bolt 6 on the first frame 12 and the second frame 22.

[0047] In some possible implementations, multiple first holes 14 are provided at intervals along the left and right direction. Multiple first holes 14 can increase the fixed position of the first frame 12 and the second frame 22, thereby facilitating the adjustment of the distance between the first clamping unit 3 and the second clamping unit 4 to suit pipes of different lengths to be tested.

[0048] In some possible implementations, multiple second holes 24 are provided at intervals along the left and right direction. Multiple second holes 24 can increase the fixed position of the first frame 12 and the second frame 22, thereby facilitating the adjustment of the distance between the first clamping unit 3 and the second clamping unit 4 to suit pipes of different lengths to be tested.

[0049] In some possible implementations, the first clamping plate 32 is an arc-shaped plate. By setting the first clamping plate 32 as an arc-shaped plate, the contact area between the arc-shaped plate and the pipe is increased, which makes it easier for the first clamping plate 32 to fix the pipe to be tested.

[0050] In some possible implementations, a protective pad 33 is provided on the side of the first clamping plate 32 away from the first axis 31. By providing the protective pad 33, the friction between the first clamping plate 32 and the inner wall of the pipe to be tested can be increased, which facilitates the fixing of the pipe to be tested and protects the pipe to be tested, preventing the first clamping plate 32 from damaging the pipe to be tested when fixing it.

[0051] In some possible implementations, such as Figure 1 and Figure 3As shown, the first clamping unit 3 includes a first guide rod 34 and a first direct drive unit 35 corresponding to the first clamping plate 32. The first guide rod 34 is slidably mounted on the first shaft 31 along the radial direction of the first shaft 31, and the other end of the first guide rod 34 is fixedly connected to the first guide rod 34. The first direct drive unit 35 is fixedly mounted on the first shaft 31, and the movable end of the first direct drive unit 35 is fixedly connected to the first clamping plate 32 to drive the first clamping plate 32 to move radially along the first shaft 31.

[0052] In this embodiment, the first direct drive unit 35 is provided to facilitate the adjustment of the position of the first clamping plate 32, and the first guide rod 34 is provided to facilitate the restriction of the movement direction of the first clamping plate 32, thereby improving the fixing effect of the first clamping plate 32 on the pipe to be tested.

[0053] In some possible implementations, such as Figure 1 and Figure 3 As shown, the first shaft 31 is provided with a first mounting cavity 36 extending radially, and the first direct drive unit 35 is provided in the first mounting cavity 36. By providing the first mounting cavity 36, it is convenient to hide and protect the first direct drive unit 35, and at the same time, it is convenient to improve the connection reliability between the first direct drive unit 35 and the first shaft 31.

[0054] In some possible implementations, such as Figure 3 As shown, each first clamping plate 32 is provided with two first guide rods 34. The two first guide rods 34 are symmetrically arranged about the first direct drive unit 35. By providing two guide rods, the constraint effect of the guide rods on the first clamping plate 32 is improved, and the first clamping plate 32 is prevented from rotating relative to the first direct drive unit 35.

[0055] In some possible implementations, the first direct drive unit 35 is configured as an electric telescopic rod, a hydraulic telescopic rod, or a pneumatic telescopic rod, which has a simple structure and is easy to install.

[0056] In some possible implementations, the second clamping unit 4 includes a second guide rod and a second direct drive unit corresponding to the second clamping plate 42. The second guide rod is slidably mounted on the second shaft 41 along the radial direction of the second shaft 41, and the other end of the second guide rod is fixedly connected to the second shaft 41. The second direct drive unit is fixedly mounted on the second shaft 41, and the movable end of the second direct drive unit is fixedly connected to the second clamping plate 42 to drive the second clamping plate 42 to move radially along the second shaft 41. The second shaft 41 is provided with a second mounting cavity extending radially. The second direct drive unit is located in the second mounting cavity. Each second clamping plate 42 is provided with two second guide rods. The two second guide rods are symmetrically arranged about the second direct drive unit. The second direct drive unit is constructed as an electric telescopic rod, a hydraulic telescopic rod, or a pneumatic telescopic rod.

[0057] In this embodiment, by setting the second clamping unit 4 to have the same structure as the first clamping unit 3, it is easy to realize the modular setting of the clamping unit, which facilitates processing, assembly and maintenance, and reduces the production and maintenance costs of the device.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pipe testing device, characterized in that, include: The first frame includes a first upright plate; The second frame is assembled to the first frame and its position is adjustable in the left and right directions. The second frame includes a second upright plate. The first clamping unit includes a first shaft and a plurality of first clamping plates. The first shaft is rotatably mounted on the first upright plate and located on the right side of the first upright plate. The plurality of first clamping plates are spaced apart circumferentially along the first shaft and their radial positions are adjustable. The first clamping plates are used to support the inner wall of the pipe to be tested. The second clamping unit includes a second shaft and a plurality of second clamping plates. The second shaft is rotatably mounted on the second vertical plate and located on the left side of the second vertical plate. The plurality of second clamping plates are spaced apart circumferentially along the second shaft and their radial positions are adjustable. The second clamping plates are used to support the inner wall of the pipe to be tested. A drive assembly, the drive assembly including a drive motor, the drive motor being disposed on the first frame and / or the second frame for driving the first shaft and / or the second shaft to rotate.

2. The pipe testing device according to claim 1, characterized in that, The drive assembly further includes a third shaft and a fourth shaft. The third shaft is rotatably mounted on the first frame and drives the first shaft. The fourth shaft is rotatably mounted on the second frame and drives the second shaft. The third shaft and the fourth shaft are plugged into each other and are anti-rotationally coupled along the circumference of the third shaft. The drive motor drives the third shaft or the fourth shaft.

3. The pipe testing device according to claim 2, characterized in that, The first frame includes a first frame, the first frame has a first cavity extending in the left-right direction, and the third axis is rotatably disposed in the first cavity. The second frame includes a second frame, the second frame has a second cavity extending in the left-right direction, the fourth axis is rotatably disposed in the second cavity, and the second frame is slidably assembled in the first cavity in the left-right direction.

4. The pipe testing device according to claim 3, characterized in that, The drive motor is fixedly mounted in the first cavity, and the output end of the drive motor is provided with a first gear. The third shaft is provided with a second gear, and the first gear and the second gear mesh with each other.

5. The pipe testing device according to any one of claims 2-4, characterized in that, The drive assembly includes a fifth shaft that extends in a vertical direction, and both ends of the fifth shaft are respectively connected to the first shaft and the third shaft for transmission. And / or, the drive assembly includes a sixth shaft that extends in a vertical direction and whose two ends are respectively connected to the second shaft and the fourth shaft.

6. The pipe testing device according to claim 5, characterized in that, The left end of the first shaft is provided with a third gear, and the first vertical plate is provided with a fourth gear that is connected to the fifth shaft in a transmission manner. The third gear and the fourth gear mesh with each other.

7. The pipe testing device according to claim 3 or 4, characterized in that, The first frame has a first hole, the second frame has a second hole, and the pipe testing device further includes a fixing bolt, which is used to pass through both the first hole and the second hole simultaneously, and the fixing bolt is threadedly engaged with the first hole and / or the second hole.

8. The pipe testing device according to any one of claims 1-4, characterized in that, The first clamping plate is an arc-shaped plate; And / or, a protective pad is provided on the side of the first clamping plate away from the first axis.

9. The pipe testing device according to any one of claims 1-4, characterized in that, The first clamping unit includes a first guide rod and a first direct drive unit corresponding to the first clamping plate. The first guide rod is slidably mounted on the first shaft along the radial direction of the first shaft, and the other end of the first guide rod is fixedly connected to the first guide rod. The first direct drive unit is fixedly mounted on the first shaft, and the movable end of the first direct drive unit is fixedly connected to the first clamping plate to drive the first clamping plate to move radially along the first shaft.

10. The pipe testing device according to claim 9, characterized in that, The first shaft is provided with a first mounting cavity extending radially, and the first direct drive unit is disposed in the first mounting cavity; And / or, each of the first clamping plates is provided with two first guide rods, the two first guide rods being symmetrically arranged about the first direct drive unit; And / or, the first direct drive unit is configured as an electric telescopic rod, a hydraulic telescopic rod, or a pneumatic telescopic rod.

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