Loading device for segment joint bending resistance test

Abstract

The utility model provides a loading device for a bending resistance test of a segment joint, which is characterized in that a frame base is arranged and is fixedly provided with a transverse slide rail unit, a longitudinal slide rail unit and a vertical slide rail unit which are distributed in X, Y and Z three axes; the transverse loading assembly is in sliding connection with the transverse sliding rail unit through a braking sliding block and can load the segment joint in the transverse direction; the longitudinal loading assembly is in sliding connection with the longitudinal sliding rail unit through a braking sliding block and can load the segment joint in the longitudinal direction; the lifting hydraulic mechanism is connected with the vertical slide rail unit in a sliding manner and is used for loading the vertical direction of the segment joint through a lifting mechanism; in the using process, a longitudinal seam joint and a circular seam joint can be loaded while a vertical loading test is conducted on a segment joint, the support design of the simply supported beam boundary is better met, and the whole process and rule of the loading test under the simply supported beam boundary condition can be more accurately obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe segment joint loading devices, in particular to a loading device used for testing the bending resistance of pipe segment joints. Background Art

[0002] Shield tunnels have been widely used in urban rail transit engineering construction due to their advantages such as high degree of mechanization and fast construction speed. Tunnel segment joints are one of the weakest and most important components in the entire lining structure. There are very few methods to repair the damage of segment joints. Once damage occurs, it will have a great impact on the integrity of the shield tunnel. Therefore, it is of great significance to study the loading of the bending performance test of segment joints. In order to understand the bending law of segment joints and the bending performance of shield tunnel segment joints, it is necessary to understand the stress conditions, deformation capacity and damage law of segment joints.

[0003] However, the existing segment joint test device uses horizontal thrust to simulate the segment axial force, applies vertical loads to both sides of the segment joint through a jack on the upper part of the segment, simulates the bending moment of the segment joint, and then measures the bearing capacity and bending resistance of the segment joint; however, this method cannot be used to study the three-way loading bending resistance test of the segment joint in which the longitudinal joint and the circumferential joint are loaded simultaneously during the vertical loading test, resulting in the inability to accurately obtain the entire process and law of the loading test under the boundary conditions of a simply supported beam; therefore, it is urgent to propose a loading device for the bending resistance test of the segment joint. Utility Model Content

[0004] The purpose of the utility model is to provide a loading device for testing the bending resistance of pipe segment joints, so as to solve the problem mentioned in the above background technology that there is currently a lack of a three-way loading bending resistance testing device for pipe segment joints that can simultaneously load the longitudinal seam joints and the circumferential seam joints during the vertical loading test.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a loading device for testing the bending resistance of pipe segment joints, comprising: a frame base, on which a transverse slide rail unit, a longitudinal slide rail unit and a vertical slide rail unit distributed in XYZ three axes are fixedly installed; a transverse loading component, which is slidably connected to the transverse slide rail unit through a brakeable slider and can load the pipe segment joint in the transverse direction; a longitudinal loading component, which is slidably connected to the longitudinal slide rail unit through a brakeable slider and can load the pipe segment joint in the longitudinal direction; a lifting hydraulic mechanism, which is slidably connected to the vertical slide rail unit and loads the pipe segment joint in the vertical direction through the lifting mechanism.

[0006] Optionally, the transverse slide rail unit, the longitudinal slide rail unit and the vertical slide rail unit each include a plurality of dual-axis linear guide rails.

[0007] Optionally, the brakeable slider includes: a sliding block having a limiting groove; at least one built-in pulley connected to a side of the sliding block having the limiting groove, the built-in pulley being slidably arranged inside the dual-axis linear guide; a brake knob passing through the limiting groove through a screw and being rotationally connected to the sliding block; a brake pad located in the limiting groove and being rotationally connected to the screw, one side of the brake pad having an abutment portion, and when the screw rotates forward or reversely, the abutment portion can approach or move away from one side of the dual-axis linear guide.

[0008] Optionally, the frame base includes: a bottom frame located at the bottom, the longitudinal slide rail unit passes through the bottom frame, and the transverse slide rail unit is symmetrically arranged on both sides of the longitudinal slide rail unit and fixedly connected to the bottom frame; a middle frame located in the middle, four support rods are fixedly arranged on the top and bottom of the middle frame, the four support rods at the bottom of the middle frame are fixedly connected to the bottom frame, and are evenly distributed on both sides of the transverse slide rail unit and the longitudinal slide rail unit to form a horizontal loading channel through which the transverse loading assembly and the longitudinal loading assembly can pass, and the four support rods at the top of the middle frame are evenly distributed between the transverse slide rail unit and the longitudinal slide rail unit to form a vertical loading channel through which the lifting hydraulic mechanism can pass.

[0009] Optionally, the transverse loading assembly and the longitudinal loading assembly both include: a sliding support and a fixed support arranged relative to each other, the sliding support and the fixed support being spaced apart to form a loading space, the fixed support being detachably fixedly connected to the transverse slide rail unit or the longitudinal slide rail unit, the sliding support being slidably connected to the transverse slide rail unit or the longitudinal slide rail unit via the brakeable slider; a trapezoidal support seat, which is located on the side of the sliding support away from the segment joint and is slidably connected to the transverse slide rail unit or the longitudinal slide rail unit via the brakeable slider; a horizontal loading mechanism, which is specifically a transverse hydraulic mechanism or a longitudinal hydraulic mechanism, and the horizontal loading mechanism is fixedly connected to the side of the trapezoidal support seat close to the sliding support via an I-shaped connector.

[0010] Optionally, the sliding support and the fixed support are hinged supports hinged by support rollers, and the sliding support and the fixed support in the lateral loading assembly are both provided with a V-shaped notch in the horizontal direction, and a flexible pad is provided in the V-shaped notch. When the pipe segment joint is placed face up, the two ends of the pipe segment joint are in contact with the lower side of the pad in the V-shaped notch, and when the pipe segment joint is placed face down, the two ends of the pipe segment joint are in contact with the upper side of the pad in the V-shaped notch.

[0011] Optionally, the lifting hydraulic mechanism includes: a limit seat, which is slidably connected to the vertical slide rail unit, the bottom of the limit seat is connected to the hydraulic cylinder, and the top is connected to the lifting mechanism.

[0012] Optionally, the bottom of the lifting hydraulic mechanism is detachably connected to a detachable vertical loading beam.

[0013] Optionally, the middle frame is also fixedly connected with an oblique support rod.

[0014] Optionally, a transfer robot is also included, and the transfer robot is arranged on one side of the longitudinal slide rail unit.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] In the utility model, a frame base is provided, on which a transverse slide rail unit, a longitudinal slide rail unit and a vertical slide rail unit distributed in the three axes of XYZ are fixedly installed; a transverse loading component is slidably connected to the transverse slide rail unit through a brakeable slider, and can load the segment joint in the transverse direction; a longitudinal loading component is slidably connected to the longitudinal slide rail unit through a brakeable slider, and can load the segment joint in the longitudinal direction; a lifting hydraulic mechanism is slidably connected to the vertical slide rail unit, and loads the segment joint in the vertical direction through the lifting mechanism; during use, the longitudinal seam joint and the circumferential seam joint can be loaded while the segment joint is being vertically loaded, which is more in line with the support design of the simply supported beam boundary, so that the entire process and law of the loading test under the simply supported beam boundary conditions can be obtained more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the front structure of the utility model.

[0019] Figure 3 It is a schematic diagram of the side structure of the utility model.

[0020] Figure 4 It is a schematic diagram of the top structure of the utility model.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the brakeable sliding block of the utility model.

[0022] Figure 6 This is the force principle diagram of the loading test of the pipe segment joint of the utility model.

[0023] In the figure: 1. frame base; 2. lifting hydraulic mechanism; 3. horizontal hydraulic mechanism; 4. longitudinal hydraulic mechanism; 5. longitudinal slide rail unit; 6. brakeable slider; 7. sliding support; 8. support roller; 9. flexible pad; 10. vertical loading end; 11. vertical slide rail unit; 12. pipe segment joint; 13. I-shaped connector; 14. oblique support rod; 15. trapezoidal support seat; 16. screw; 17. brake pad; 18. abutment; 19. mechanical gripper; 20. mechanical arm; 21. mechanical support; 22. fixed support; 23. brake knob; 24. built-in pulley; 25. removable vertical loading beam. DETAILED DESCRIPTION

[0024] The scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0027] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0028] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] Please refer to Figure 1 - Figure 6 The utility model discloses a loading device for testing the bending resistance of a segment joint, comprising: a frame base 1, on which a transverse slide rail unit, a longitudinal slide rail unit 5 and a vertical slide rail unit 11 distributed in three axes of XYZ are fixedly installed; a transverse loading component, which is slidably connected to the transverse slide rail unit through a brakeable slider 6 and can load the segment joint 12 in the transverse direction; a longitudinal loading component, which is slidably connected to the longitudinal slide rail unit 5 through a brakeable slider 6 and can load the segment joint 12 in the longitudinal direction; a lifting hydraulic mechanism 2, which is slidably connected to the vertical slide rail unit and loads the segment joint 12 in the vertical direction through the lifting mechanism.

[0031] Specifically, the transverse slide rail unit, the longitudinal slide rail unit 5 and the vertical slide rail unit 11 on the frame base 1 in the present application are all detachably connected to the transverse loading assembly, the longitudinal loading assembly and the lifting hydraulic mechanism 2. In order to adapt to the loading of more types of shield segments, the operator can hang accessories of appropriate size and shape as needed.

[0032] More specifically, the positions of the transverse loading assembly, the longitudinal loading assembly and the lifting hydraulic mechanism 2 can be adjusted by the brakeable slider 6. When loading, the brakeable slider is locked and braked, so that the shield segment joints can be loaded and the various loading mechanisms can be ensured not to move due to the reaction force, so that the loading device can be suitable for different shield segments, and has the advantages of convenient replacement of segments, simple operation, and improved efficiency.

[0033] During use, the longitudinal seam joints and circumferential seam joints can be loaded at the same time as the vertical loading test on the segment joints, which is more in line with the support design of the simply supported beam boundary, so that the entire process and laws of the loading test under the simply supported beam boundary conditions can be obtained more accurately.

[0034] In one embodiment of the present invention, the transverse slide rail unit, the longitudinal slide rail unit 5 and the vertical slide rail unit 11 all include a plurality of dual-axis linear guide rails.

[0035] Specifically, the longitudinal slide rail unit 5 includes a plurality of double-axis linear guides arranged along the longitudinal direction, and the plurality of double-axis linear guides are arranged in parallel in the transverse direction, and the transverse slide rail unit includes a plurality of double-axis linear guides arranged in the transverse direction and symmetrically on both sides of the longitudinal slide rail unit 5, and the plurality of double-axis linear guides on both sides of the longitudinal slide rail unit 5 are arranged in parallel in the longitudinal direction; in the present application, the longitudinal slide rail unit 5 has two double-axis linear guides, and the transverse slide rail unit has four double-axis linear guides, and the number of double-axis linear guides located on both sides of the longitudinal slide rail unit 5 is two; this setting method can make the force on the pipe segment joints more uniform during loading, and will not cause the pipe segment joints to be displaced or even fall off due to the force point not being in the center position.

[0036] In one embodiment of the utility model, the brakeable slider includes: a sliding block, which has a limiting groove; at least one built-in pulley 24, which is connected to a side of the sliding block having the limiting groove, and the built-in pulley 24 is slidably arranged inside the dual-axis linear guide; a brake knob 23, which passes through the limiting groove through a screw rod 16 and is rotationally connected to the sliding block; a brake pad 17, which is located in the limiting groove and is rotationally connected to the screw rod 16, and one side of the brake pad 17 has an abutment portion 18, and when the screw rod 16 rotates forward or reversely, the abutment portion 18 can approach or move away from one side of the dual-axis linear guide.

[0037] Specifically, the brakeable slider 6 can slide in cooperation with the dual-axis linear guide rail, so that the transverse loading component, the longitudinal loading component and the vertical loading component all have a certain adjustable space, which can prepare for the placement of the pipe segment joint in a suitable position. The sliding support 7 and the fixed support 22 in the transverse loading component and the longitudinal loading component are fixedly connected to the brakeable slider 6, and the brakeable slider 6 has a locking structure, which is locked by the brake knob 23. After the installation is completed, it is only necessary to check whether the brake knob 23 is tightened, and whether the movement of each loading component on the guide rail is smooth after the connection. Lubricating fluid is added to the surface of the dual-axis linear guide rail to ensure that the loading test can be started after the boundary of the hinge support during the test, which is more convenient to operate.

[0038] In one embodiment of the utility model, the frame base 1 includes: a bottom frame located at the bottom, the longitudinal slide rail unit 5 passes through the bottom frame, and the transverse slide rail unit is symmetrically arranged on both sides of the longitudinal slide rail unit 5 and fixedly connected to the bottom frame; a middle frame located in the middle, four support rods are fixedly arranged on the top and bottom of the middle frame, the four support rods at the bottom of the middle frame are fixedly connected to the bottom frame, and are evenly distributed on both sides of the transverse slide rail unit and the longitudinal slide rail unit to form a horizontal loading channel for the transverse loading assembly and the longitudinal loading assembly to pass through, and the four support rods at the top of the middle frame are evenly distributed between the transverse slide rail unit and the longitudinal slide rail unit to form a vertical loading channel for the lifting hydraulic mechanism 2 to pass through.

[0039] Specifically, the shape of the frame base 1 can be set as needed, and no specific limitation is made here, as long as it satisfies the requirements of not causing interference during lateral loading, longitudinal loading and vertical loading; in the present application, the frame base 1 includes three parts, upper, middle and lower, wherein the bottom is a square bottom frame, the longitudinal slide rail unit 5 passes through the bottom frame, and the transverse slide rail units are symmetrically arranged on both sides of the longitudinal slide rail unit 5 and fixedly connected to the bottom frame; the middle part of the frame base 1 is also a square middle frame, and its four surrounding frames correspond to the four surrounding frames of the bottom frame one by one and are arranged in parallel, and at the bottom of the middle frame Each corner is connected with a vertically arranged support rod, and the four support rods are evenly distributed on both sides of the transverse slide rail unit and the longitudinal slide rail unit to form a horizontal loading channel through which the transverse loading component and the longitudinal loading component can pass; the upper part of the frame base 1 is four vertically arranged double-axis linear guides, and the four vertically arranged double-axis linear guides are arranged along a cross shape and are evenly distributed between the transverse slide rail unit and the longitudinal slide rail unit in pairs to form a vertical loading channel through which the lifting hydraulic mechanism 2 can pass, and the structure is simple and very stable.

[0040] In one embodiment of the utility model, the transverse loading assembly and the longitudinal loading assembly both include: a sliding support 7 and a fixed support 22 arranged relatively to each other, the sliding support 7 and the fixed support 22 are spaced apart to form a loading space, the fixed support 22 is detachably fixedly connected to the transverse slide rail unit or the longitudinal slide rail unit 5, the sliding support 7 is slidably connected to the transverse slide rail unit or the longitudinal slide rail unit 5 through the brakeable slider 6; a trapezoidal support seat 15, which is located on the side of the sliding support 7 away from the pipe segment joint 12 and is slidably connected to the transverse slide rail unit or the longitudinal slide rail unit 5 through the brakeable slider 6; a horizontal loading mechanism, which is specifically a transverse hydraulic mechanism 3 or a longitudinal hydraulic mechanism 4, and the horizontal loading mechanism is fixedly connected to the side of the trapezoidal support seat 15 close to the sliding support 7 through an I-shaped connector 13.

[0041] Specifically, the height of the transverse loading assembly and the height of the longitudinal loading assembly can be set to be the same or different, depending on the placement of the segment joints. Since the segment joints used in the segment joint loading test are mostly close to a plane in shape and have a small curvature, the consistency of the height of the transverse loading assembly and the longitudinal loading assembly will not affect the horizontal loading force, and the transverse loading assembly and the longitudinal loading assembly are also detachable and can be replaced as needed.

[0042] In one embodiment of the utility model, the sliding support 7 and the fixed support 22 are hinged supports hingedly connected by a support roller 8, and the sliding support 7 and the fixed support 22 in the lateral loading assembly are both provided with a V-shaped notch in the horizontal direction, and a flexible pad 9 is provided in the V-shaped notch. When the pipe segment joint 12 is placed face up, the two ends of the pipe segment joint 12 are in contact with the lower side of the pad in the V-shaped notch, and when the pipe segment joint 12 is placed face down, the two ends of the pipe segment joint 12 are in contact with the upper side of the pad in the V-shaped notch.

[0043] Specifically, when loading the annular joint of the segment joint, since the segment has a curvature, the two sides of the segment joint need to be clamped to prevent displacement during loading. However, since the position heights of the two sides of the segment joint are different when the segment joint is placed upward and downward, a V-shaped notch can be provided to cooperate with the hinge support to condition its position so as to clamp the sides of the segment joints of different heights. This method has a simple structure and solves the problem of support design at the boundary of simply supported beams that is difficult to solve in traditional test devices. It can adapt to segment joints of various shapes, making it more time-saving to replace segment joints and greatly improving operating efficiency.

[0044] In one embodiment of the utility model, the lifting hydraulic mechanism 2 includes: a limit seat, which is slidably connected to the vertical slide rail unit 11, the bottom of the limit seat is connected to the hydraulic cylinder, and the top is connected to the lifting mechanism.

[0045] In one embodiment of the present invention, the bottom of the lifting hydraulic mechanism 2 is detachably connected to a detachable vertical loading beam 25 .

[0046] Specifically, the lifting hydraulic mechanism 2 at the top is detachably connected to the detachable vertical loading beam 25. The operator can replace different detachable vertical loading beams 25 according to different shapes of segment joints, which is convenient for exploring the bending resistance of segment joints of different sizes, thereby studying the bending resistance of segment joints of different shield tunnels.

[0047] In one embodiment of the present invention, the middle frame is further fixedly connected with an oblique support rod 14, which can effectively improve the support stability.

[0048] One embodiment of the present invention further includes a transfer robot, which is arranged on one side of the longitudinal slide rail unit 5.

[0049] Specifically, the transfer robot includes a rotatable mechanical support 21, a mechanical arm 20 and a mechanical gripper 19 that can grab the pipe segment joint to be loaded to the loading area. Since there are many ways to set up the automated robot, they are not elaborated here. By setting one or more transfer robots on the side of the longitudinal slide rail unit 5, the efficiency can be greatly improved.

[0050] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A loading device for testing the bending resistance of a pipe segment joint, characterized in that: include: A frame base (1) is fixedly mounted with a transverse slide rail unit, a longitudinal slide rail unit (5) and a vertical slide rail unit (11) distributed in three axes XYZ; A transverse loading component, which is slidably connected to the transverse slide rail unit via a brakeable slider (6) and is capable of loading the pipe segment joint (12) in the transverse direction; A longitudinal loading assembly, which is slidably connected to the longitudinal slide rail unit (5) via a brakeable slider (6) and is capable of loading the pipe segment joint (12) in the longitudinal direction; A lifting hydraulic mechanism (2) is slidably connected to the vertical slide rail unit and loads the pipe segment joint (12) vertically through the lifting mechanism.

2. The loading device for testing the bending resistance of pipe segment joints according to claim 1 is characterized in that: The transverse slide rail unit, the longitudinal slide rail unit (5) and the vertical slide rail unit (11) all include a plurality of dual-axis linear guide rails.

3. The loading device for testing the bending resistance of pipe segment joints according to claim 2 is characterized in that: The brakeable sliding block comprises: A sliding block having a limiting groove; At least one built-in pulley (24), which is connected to a side of the sliding block having a limiting groove, and the built-in pulley (24) is slidably arranged inside the dual-axis linear guide rail; A brake knob (23), which penetrates the limit groove through a screw rod (16) and is rotatably connected to the sliding block; A brake pad (17) is located in the limiting groove and is rotationally connected to the screw rod (16). One side of the brake pad (17) has an abutment portion (18). When the screw rod (16) rotates forward or backward, the abutment portion (18) can move closer to or farther from one side of the dual-axis linear guide rail.

4. The loading device for testing the bending resistance of pipe segment joints according to claim 1 is characterized in that: The frame base (1) comprises: A bottom frame is located at the bottom, the longitudinal slide rail unit (5) passes through the bottom frame, and the transverse slide rail units are symmetrically arranged on both sides of the longitudinal slide rail unit (5) and are fixedly connected to the bottom frame; A middle frame located in the middle part has four support rods fixedly arranged on the top and bottom. The four support rods at the bottom of the middle frame are fixedly connected to the bottom frame and are evenly distributed on both sides of the transverse slide rail unit and the longitudinal slide rail unit to form a horizontal loading channel through which the transverse loading component and the longitudinal loading component can pass. The four support rods at the top of the middle frame are evenly distributed between the transverse slide rail unit and the longitudinal slide rail unit to form a vertical loading channel through which the lifting hydraulic mechanism (2) can pass.

5. The loading device for testing the bending resistance of pipe segment joints according to claim 4 is characterized in that: The transverse loading assembly and the longitudinal loading assembly both include: A sliding support (7) and a fixed support (22) are arranged opposite to each other, the sliding support (7) and the fixed support (22) are spaced apart to form a loading space, the fixed support (22) is detachably fixedly connected to the transverse slide rail unit or the longitudinal slide rail unit (5), and the sliding support (7) is slidably connected to the transverse slide rail unit or the longitudinal slide rail unit (5) via the brakeable slider (6); a trapezoidal support seat (15), which is located on a side of the sliding support (7) away from the pipe segment joint (12) and is slidably connected to the transverse slide rail unit or the longitudinal slide rail unit (5) via the brakeable slide block (6); The horizontal loading mechanism is specifically a transverse hydraulic mechanism (3) or a longitudinal hydraulic mechanism (4), and the horizontal loading mechanism is fixedly connected to a side of the trapezoidal support seat (15) close to the sliding support seat (7) through an I-shaped connecting piece (13).

6. The loading device for testing the bending resistance of pipe segment joints according to claim 5 is characterized in that: The sliding support (7) and the fixed support (22) are hinged supports hingedly connected by a support roller (8). The sliding support (7) and the fixed support (22) in the transverse loading assembly are both provided with a V-shaped notch in the horizontal direction. A flexible pad (9) is arranged in the V-shaped notch. When the pipe segment joint (12) is placed with its front side facing upward, the two ends of the pipe segment joint (12) are in contact with the lower side of the pad in the V-shaped notch. When the pipe segment joint (12) is placed with its front side facing downward, the two ends of the pipe segment joint (12) are in contact with the upper side of the pad in the V-shaped notch.

7. The loading device for testing the bending resistance of pipe segment joints according to claim 1 is characterized in that: The lifting hydraulic mechanism (2) comprises: A limit seat is slidably connected to the vertical slide rail unit (11); the bottom of the limit seat is connected to a hydraulic cylinder, and the top is connected to a lifting mechanism.

8. The loading device for testing the bending resistance of pipe segment joints according to claim 7 is characterized in that: The bottom of the lifting hydraulic mechanism (2) is detachably connected to a detachable vertical loading beam (25).

9. The loading device for testing the bending resistance of pipe segment joints according to claim 4, characterized in that: The middle frame is also fixedly connected to an oblique support rod (14).

10. The loading device for testing the bending resistance of pipe segment joints according to claim 1, characterized in that: It also includes a transfer robot, which is arranged on one side of the longitudinal slide rail unit (5).

Images