A shield scraper weld joint strength detection platform, detection equipment and detection method

Abstract

The application provides a shield scraper weld joint strength detection platform, a detection equipment and a detection method. The detection method is to detect the shield scraper on a movable detection platform. When detecting, the shield scraper is subjected to a loading pressure and a supporting force of the detection platform. When the loading pressure value is reached, the detection platform acts, the supporting force is unloaded, and whether the strength is qualified is judged according to the weld joint failure condition. The detection platform is provided with a clamping position for mounting the shield scraper. The detection platform can be turned over or moved and is connected with a supporting device. When the set loading pressure is reached, the supporting device can be contracted along the supporting direction and drive the detection platform to turn over or move. The detection equipment comprises a rack and a pressure applying device for applying a load to the weld joint of the shield scraper. The rack is provided with the above detection platform. The detection platform and the detection equipment in the application are used to realize the above detection method. When screening the weld joint strength, the supporting force is quickly unloaded, the shield scraper is prevented from being damaged due to continuous pressure application, the actual working condition is met, and the detection result is accurate.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of shield cutter, in particular to a shield scraper welding seam strength detection platform, detection equipment and detection method. BACKGROUND

[0002] At present, with the wide use of shield machine in China, the performance requirements of shield cutter are also continuously improved. The shield scraper is a steel base body welded with a hard alloy block, and the welding seam strength is an important factor affecting the performance of the shield scraper. During the tunneling process of the shield machine, if the cutter is frequently replaced underground, not only the engineering progress will be affected, but also safety hazards will be brought to the workers. Therefore, in order to reduce the frequency of replacing the cutter, it is necessary to preliminarily screen and detect the welding seam strength of the shield scraper.

[0003] A shield scraper welding seam strength detection device is disclosed in Chinese patent application with application publication number CN114705552A (publication date: 2022.07.05), which is provided with a pressure applying part. The measured shield scraper is fixed at the bottom, and the pressure applying part applies pressure to the welding joint of the measured shield scraper. The strength of the welding seam is judged according to the pressure condition.

[0004] In the above-mentioned prior art, the bottom of the shield scraper is fixed during detection, and only the loading and unloading are controlled by the pressure applying part. The unloading response is not sensitive enough, and it is suitable for detecting the ultimate strength of the welding seam of the shield scraper, which is easy to cause the fracture failure of the shield scraper. In the actual tunneling process, the shield scraper is subjected to instantaneous and sudden load, and if the unloading cannot be done in time, there is also the problem of inaccurate detection results.

[0005] Therefore, it is necessary to provide a detection method which can accurately preliminarily screen whether the welding seam strength of the shield scraper is qualified. SUMMARY

[0006] The purpose of the present application is to provide a shield scraper welding seam strength detection platform, detection equipment and detection method to solve the technical problem that the welding seam strength of the shield scraper cannot be accurately preliminarily screened and detected in the prior art.

[0007] To achieve the above-mentioned purpose, the technical scheme of the shield scraper welding seam strength detection method provided by the present application is as follows:

[0008] A shield scraper welding seam strength detection method, the shield scraper is installed on a movable detection platform. During detection, the welding seam is subjected to loading pressure and support force of the detection platform at the same time. When the set loading pressure is reached, the detection platform acts, and the support force is unloaded immediately. Whether the welding seam strength of the shield scraper meets the standard is judged according to the failure condition of the welding seam after being subjected to pressure.

[0009] The beneficial effect is that when the load applied to the shield scraper meets the test purpose load, the support force is unloaded by the detection platform action, avoiding the continuous pressure causing the shield scraper to exceed the limit load and break down.

[0010] As a further improvement, the detection platform is a turnover platform, and the turnover axis is located on the side of the loading position.

[0011] The beneficial effect is that through the turnover action, the unloading of the support force can be quickly responded.

[0012] To achieve the above-mentioned purpose, the technical scheme of the shield scraper weld strength detection platform provided by the present application is:

[0013] A shield scraper weld strength detection platform, the detection platform is provided with a clamping position for installing a shield scraper, the detection platform can be turned over or moved up and down, and is connected with a support device, when the set loading pressure is reached, the support device can be contracted along the support direction and drive the detection platform to turn over or move up and down.

[0014] The beneficial effect is that when the load required for detection is reached, the support device is compressed, and the detection platform unloads the support force of the support device on the shield scraper through the turnover or up-and-down movement, avoiding the continuous pressure causing the shield scraper to exceed the limit load and break down, and more in line with the actual working conditions of the shield scraper, the detection result is more accurate.

[0015] As a further improvement, the support device includes a support hydraulic cylinder, and one end of the support hydraulic cylinder is connected with the detection platform through a force transmission structure.

[0016] The beneficial effect is that the hydraulic cylinder is easy to control, relatively stable and has a large support force.

[0017] As a further improvement, the force transmission structure is a connecting rod and slider structure, and the support hydraulic cylinder is connected with the slider.

[0018] The beneficial effect is that the force transmission is realized by the cooperation of the slider and the connecting rod, and the support hydraulic cylinder can only be adjusted by stretching and contracting forward and backward, so that the working stability of the support hydraulic cylinder can be improved.

[0019] To achieve the above-mentioned purpose, the technical scheme of the shield scraper weld strength detection device provided by the present application is:

[0020] The utility model provides a kind of shield scraper weld joint strength detection equipment, including frame and the pressure device for load to shield scraper weld joint, detection platform is equipped on frame, the clamping site for installing shield scraper is equipped in detection platform, detection platform can overturn or move up and down, and be connected with support device, when reaching set load pressure, the support device can contract along support direction, and drive detection platform overturn or move up and down.

[0021] Beneficial effect is: when reaching the load required for detection, the support device is compressed, and the detection platform is unloaded by the support force of the support device on the shield scraper through overturning or moving up and down, which avoids the continuous pressure from causing the shield scraper to break down beyond the limit load and is more in line with the actual working conditions of the shield scraper, so that the detection result is more accurate.

[0022] As a further improvement, the support device includes a support hydraulic cylinder connected to the detection platform through a force transmission structure.

[0023] Beneficial effect is: the hydraulic cylinder is easy to control, relatively stable and has a large support force.

[0024] As a further improvement, the force transmission structure is a connecting rod and slider structure, and the support hydraulic cylinder is connected to the slider.

[0025] Beneficial effect is: the force is transmitted through the cooperation of the slider and the connecting rod, and the support hydraulic cylinder can only be adjusted by extending and retracting forward and backward, which can improve the working stability of the support hydraulic cylinder.

[0026] As a further improvement, the frame is provided with a movable loading beam, and the loading beam is provided with a jacking rod for transmitting load to the shield scraper.

[0027] As a further improvement, the clamping site provided on the detection platform is formed by a clamping device, and the position of the clamping device is adjustable.

[0028] Beneficial effect is: it is convenient to load the weld joints at different positions of the shield scraper.

[0029] As a further improvement, the clamping device includes a mounting plate provided with a positioning block and a pressing structure, the positioning block is used for positioning cooperation with the mounting surface of the shield scraper, and the pressing structure is used for locking the positioning block and the shield scraper.

[0030] Beneficial effect is: it is convenient to install, the stress on the shield scraper under actual working conditions is closer to the detection result, so that the detection result is more accurate.

[0031] As a further improvement, the pressing structure includes a pressing hydraulic cylinder and a guide rail, one end of the pressing hydraulic cylinder is fixed on the mounting plate, the other end is connected to the positioning block, and the guide rail is used for guiding the movement of the positioning block.

[0032] The beneficial effect is that the hydraulic cylinder can be adjusted in extension and retraction, facilitating disassembly of the shield scraper after detection is completed. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 Figure 1 is a structural schematic diagram of the shield scraper weld strength detection device embodiment 1 in the present application.

[0034] Figure 2 Figure 2 is a partial enlarged rear view of the shield scraper weld strength detection device embodiment 1 in the present application. Figure 1

[0035] BRIEF DESCRIPTION OF DRAWINGS

[0036] 1, rack; 2, limit block; 3, loading crossbeam; 4, sliding groove; 5, fixed crossbeam; 6-1, loading hydraulic cylinder; 6-2, supporting hydraulic cylinder; 7, top rod; 8, shield scraper; 9, pressing hydraulic cylinder; 10, mounting plate; 11, bolt; 12, guide rail; 13, positioning block; 14, connecting rod; 15, hinge; 16, sliding block; 17, turnover workbench; 18, rotating shaft; 19, hydraulic pipeline; 20, hydraulic power unit. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present application more clear and obvious, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the present application, that is, the described examples are only a part of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0038] Therefore, the detailed description of the embodiments of the present application provided in the drawings below is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0039] ​It should be noted that the relationship terms such as "first" and "second" and the like appearing in the present application are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any actual relationship or sequence between the entities or operations. Moreover, terms such as "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the elements defined by the statement "including a" and the like do not exclude the process, method, article or device including the elements from the process, method, article or device.

[0040] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" appearing in the present application should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the term "provided with" appearing in the present application should be understood in a broad sense, for example, the object "provided with" can be part of the body, or it can be arranged separately from the body and connected to the body, and the connection can be detachable or non-detachable. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] The present application will be further described in detail below in combination with embodiments.

[0043] Specific embodiment 1 of the shield scraper weld strength detection equipment provided by the present application:

[0044] As shown in Figure 1 and Figure 2 The shield scraper weld strength detection equipment in the present embodiment includes a rack 1, a detection platform is arranged in the bottom groove of the rack 1, the detection platform includes a turnover workbench 17 and a support device connected below the turnover workbench 17, and the turnover workbench 17 is connected with the rack 1 through a rotating shaft 18. A pressing device is arranged above the detection platform, and a clamping device for clamping the shield scraper 8 is arranged on the turnover workbench 17.

[0045] The supporting device comprises a supporting hydraulic cylinder 6-2 and a sliding block 16, a connecting rod 14 and a hinge 15 for force transmission, the power of the supporting hydraulic cylinder 6-2 is provided by the hydraulic power unit 20 through the hydraulic pipeline 19, one end of the supporting hydraulic cylinder 6-2 is fixed on the rack 1, the other end is connected with the sliding block 16, one end of the connecting rod 14 is connected with the sliding block 16 through the hinge 15, the other end is hinged with the turnover workbench 17 of the detection platform through the hinge 15. When the pressure device applies load to the shield scraper 8, the supporting hydraulic cylinder 6-2 provides support force for the turnover workbench 17, so that the shield scraper 8 can be stably pressed, when the set load is reached, the supporting hydraulic cylinder 6-2 retracts, driving the sliding block 16 to retract, the turnover workbench 17 turns over, realizing the unloading of the support force of the shield scraper 8, so that the load borne by the shield scraper 8 is closer to the target set load and the actual working condition, avoiding the continuous pressure causing the shield scraper 8 to break down, and the detection result is more accurate. The action of the turnover workbench 17 can more sensitively realize the unloading of the support force of the shield scraper 8, through the force transmission structure of the connecting rod and the sliding block, so that the reaction force supporting the shield scraper 8 is mostly applied to the rack 1 through the connecting rod 14 and the sliding block 16, and the supporting hydraulic cylinder 6-2 only needs to be extended and retracted forward and backward, so that the structure is more stable.

[0046] The clamping device comprises a mounting plate 10, a pressing hydraulic cylinder 9 and a positioning block 13, the positioning block 13 is positioned and matched with the mounting surface of the shield scraper 8, under the action of the pressing hydraulic cylinder 9, the positioning block 13 moves along the guide rail 12 and presses the positioning plate of the mounting plate 10, locking the shield scraper 8 and the positioning block 13, facilitating the installation and disassembly. The mounting plate 10 and the turnover workbench 17 are connected through bolts 11, the turnover workbench 17 is provided with a dovetail groove, and the mounting plate 10 can be fixedly connected with different positions of the dovetail groove through bolts, so as to realize the position adjustment, facilitating the detection of the welds at different positions of the shield scraper 8.

[0047] The power source of the pressure device is a loading hydraulic cylinder 6-1, the power of the loading hydraulic cylinder 6-1 is provided by the hydraulic power unit 20 through the hydraulic pipeline 19, the loading hydraulic cylinder 6-1 is arranged between the fixed cross beam 5 and the loading cross beam 3 of the rack 1, the loading cross beam 3 slides up and down along the sliding groove 4 of the rack 1 and is provided with a jacking rod 7 for transmitting load to the shield scraper 8, and a limiting block 2 is arranged in the sliding groove 4 for limiting the movement range of the loading cross beam 3, avoiding the overstroke of the loading hydraulic cylinder 6-1 causing the failure of the shield scraper 8, and further protecting the shield scraper 8.

[0048] The working principle of the shield scraper weld joint detection device in the embodiment is as follows: during detection, first, the output thrust of the loading hydraulic cylinder 6-1 and the supporting hydraulic cylinder 6-2 is determined according to the detection requirement, the position of the limiting block 2 is adjusted to ensure that the loading beam 3 has a reasonable moving range; then the position of the clamping hydraulic cylinder 9 and the positioning block 13 is adjusted, the shield scraper 8 is put in, and then the clamping hydraulic cylinder 9 is continuously adjusted to lock the positioning block 13 and the shield scraper 8; finally, the device is started, the loading hydraulic cylinder 6-1 is controlled to press downward on the shield scraper 8, the supporting hydraulic cylinder 6-2 pushes the sliding block 16 and the connecting rod 14 to support the turnover workbench 17, so that the shield scraper 8 and the top rod 7 keep in a pressed contact state, when the set thrust of the loading hydraulic cylinder 6-1 is reached, the supporting hydraulic cylinder 6-2 is retracted to unload the thrust, and the turnover workbench 17 is turned over to unload the support force on the shield scraper 8.

[0049] The specific embodiment 2 of the shield scraper weld joint strength detection device provided by the application mainly differs from the embodiment 1 in that, in the embodiment 1, the detection platform is unloaded by the turnover of the turnover workbench 17. In the embodiment, the detection platform can move up and down, and the structure of the pressing device is similar, the detection platform can move up and down along the sliding groove of the rack, the bottom of the detection platform is provided with a supporting hydraulic cylinder, which can support the detection platform and unload the support force.

[0050] The specific embodiment 3 of the shield scraper weld joint strength detection device provided by the application mainly differs from the embodiment 1 in that, in the embodiment 1, the supporting hydraulic cylinder 6-2 of the detection platform is connected with the turnover workbench 17 through a connecting rod and sliding block structure. In the embodiment, one end of the supporting hydraulic cylinder is directly hinged with the turnover workbench, and the supporting hydraulic cylinder can directly support the turnover workbench or unload the support force by extension and retraction.

[0051] The specific embodiment 4 of the shield scraper weld joint strength detection device provided by the application mainly differs from the embodiment 1 in that, in the embodiment 1, the supporting device of the detection platform includes the supporting hydraulic cylinder 6-2. In the embodiment, the supporting device includes a pneumatic cylinder.

[0052] The specific embodiment 5 of the shield scraper weld joint strength detection device provided by the application mainly differs from the embodiment 1 in that, in the embodiment 1, the power source of the pressing device is the loading hydraulic cylinder 6-1. In the embodiment, the power source of the pressing device is a hydraulic motor, the hydraulic motor outputs power through a screw nut mechanism, and the load is applied to the shield scraper.

[0053] The embodiment of the shield scraper weld joint strength detection platform in the application is as follows:

[0054] The embodiment of the shield scraper weld joint strength detection platform is the detection platform described in any one of the embodiments 1-4 of the shield scraper weld joint strength detection device, which will not be described in detail here.

[0055] The embodiment of the shield scraper weld joint strength detection method in the application:

[0056] The shield scraper weld joint strength detection method installs the shield scraper on the movable detection platform. When detecting, the weld joint is subjected to the loading pressure and the support force of the detection platform at the same time. When the set loading pressure is reached, the detection platform acts, and the support force is unloaded immediately. Whether the shield scraper weld joint strength meets the standard is judged according to the failure condition of the weld joint after being subjected to the pressure. The specific process can be realized by the shield scraper weld joint strength detection equipment in any one of the embodiments 1-5 of the shield scraper weld joint strength detection equipment described above. Taking the embodiment 1 as an example, the specific steps include the following steps:

[0057] S1: setting parameters, determining the output thrust of the loading hydraulic cylinder 6-1 and the support hydraulic cylinder 6-2 according to the detection requirement, adjusting the position of the limiting block 2 to ensure the reasonable moving range of the loading beam 3;

[0058] S2: clamping the shield scraper, adjusting the position of the clamping hydraulic cylinder 9 and the positioning block 13, putting in the shield scraper 8, and then continuing to adjust the clamping hydraulic cylinder 9, locking the positioning block 13 and the shield scraper 8;

[0059] S3: starting detection, controlling the loading hydraulic cylinder 6-1 to press the shield scraper 8 downward, the support hydraulic cylinder 6-2 pushing the sliding block 16 and the connecting rod 14 to support the turnover workbench 17, so that the shield scraper 8 and the top rod 7 keep the pressed contact state. When the set thrust of the loading hydraulic cylinder 6-1 is reached, the support hydraulic cylinder 6-2 is retracted, the sliding block 16 is retracted, the turnover workbench 17 is turned over, and the support force of the shield scraper 8 is unloaded;

[0060] S4: judging the weld joint strength, judging whether the weld joint strength is qualified according to the failure condition of the shield scraper weld joint after being subjected to the pressure.

[0061] Finally, it should be noted that the above description is only the preferred embodiment of the application and is not used to limit the application. Although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments without paying creative labor, or replace some technical features with equivalents. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A method for detecting a weld strength of a shield cutter, the method comprising: applying a load to the shield cutter; and measuring a deflection of the shield cutter. The shield scraper is installed on a movable detection platform, when detecting, the weld is subjected to loading pressure and support force of the detection platform, when reaching the set loading pressure, the detection platform acts, the support force is unloaded immediately, continuous pressure on the shield scraper is avoided, and whether the weld strength of the shield scraper meets the standard is judged according to the failure condition of the weld after being subjected to pressure.

2. The shield cutter weld joint strength detection method according to claim 1, characterized in that, The detection platform is a turnover platform, the turnover axis is located on one side of the loading position, and the support force is unloaded through turnover of the detection platform.

3. A shield cutter weld seam strength detection platform, characterized in that, The detection platform is provided with a clamping position for installing the shield scraper, the shield scraper is provided with the support force, the detection platform can be turned over or moved up and down, and is connected with a supporting device, when reaching the set loading pressure, the supporting device can be retracted along the supporting direction and drive the detection platform to turn over or move up and down, so as to unload the support force on the shield scraper and avoid continuous pressure on the shield scraper.

4. The shield cutter weld strength inspection platform of claim 3, wherein, The supporting device comprises a supporting hydraulic cylinder (6-2), one end of the supporting hydraulic cylinder (6-2) is connected with the detection platform through a force transmission structure.

5. The shield cutter weld strength inspection platform of claim 4, wherein, The force transmission structure is a connecting rod and sliding block structure, and the supporting hydraulic cylinder (6-2) is connected with a sliding block (16).

6. A shield cutter weld seam strength testing apparatus comprising a frame (1) and a pressure applying device for applying a load to a shield cutter (8) weld seam, characterized in that, The detection platform is arranged on the rack (1).

7. The shield cutter weld seam strength detection apparatus of claim 6, wherein, The rack (1) is provided with a movable loading beam (3), the loading beam (3) is provided with a jacking rod (7) for transmitting load to the shield scraper (8), and the loading beam (3) and the rack (1) are provided with a power device for applying pressure.

8. The shield cutter weld seam strength detection apparatus according to claim 6 or 7, characterized in that, The clamping position of the detection platform is formed by a clamping device, and the position of the clamping device is adjustable.

9. The shield cutter weld seam strength detection apparatus of claim 8, wherein, The clamping device comprises a mounting plate (10), the mounting plate (10) is provided with a positioning block (13) and a pressing structure, the positioning block (13) is used for positioning cooperation with a mounting surface of the shield scraper (8), and the pressing structure is used for locking the positioning block (13) and the shield scraper (8).

10. The shield cutter weld seam strength detection apparatus of claim 9, wherein, The pressing structure comprises a pressing hydraulic cylinder (9) and a guide rail (12), one end of the pressing hydraulic cylinder (9) is fixed on the mounting plate (10), the other end is connected with the positioning block (13), and the guide rail (12) is used for guiding movement of the positioning block (13).

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