Positioning clamp for steel structure welding joint detection

Abstract

The utility model relates to the technical field of welded joint detection, and discloses a positioning clamp for steel structure welded joint detection, which comprises a fixing frame, the top of the front side of the fixing frame is fixedly connected with a fixing plate, the left side and the right side of the bottom wall of the fixing plate are fixedly connected with hydraulic rods, and the bottom ends of the hydraulic rods are fixedly connected with a lifting plate. Rear clamping plates are fixedly connected to the front side of the fixing plate and the front side of the lifting plate, a limiting shell is fixedly connected to one side of each rear clamping plate, a threaded rod is rotatably connected to the rear side of the inner wall of each limiting shell, a rotary knob is fixedly connected to the front end of each threaded rod, and a front clamping plate is in threaded connection to the outer wall of each rotary knob. According to the positioning clamp, the distance between the two front clamping plates and the rear clamping plate is adjusted through lifting of the lifting plate, then the front clamping plates are driven by the threaded rods to move in the horizontal direction, and therefore the positioning clamp can adapt to welding joints of different specifications, the adaptation range of the clamp is widened, and the flexibility of the clamp is improved.

Description

Technical Field

[0001] This utility model relates to the field of welded joint inspection technology, and in particular to a positioning fixture for inspecting welded joints of steel structures. Background Technology

[0002] A welded joint is a joint that connects two or more parts by welding. It is an important component of welded structures and should have sufficient strength to withstand various loads during use, including tensile, compressive, bending or shear loads, to ensure the safety of the structure. At the same time, it should have good toughness to prevent brittle fracture under dynamic loads of impact or vibration.

[0003] During the processing and production of welded joints, inspection is required, which necessitates the use of a positioning fixture to assist in the inspection. Existing fixtures have simple structural designs and rough manufacturing processes. For example, inaccurate positioning references or deformation of the clamping mechanism make it difficult to meet the positioning requirements of high-precision welded joint inspection. The current solution is to use high-precision positioning elements, such as precision guide rails, positioning pins, or grating rulers, to improve the positioning accuracy and repeatability of the fixture. However, different welded joints still require different positioning methods, and some fixtures are only suitable for a single joint type, failing to meet diverse inspection needs. This reduces the adaptability and flexibility of the fixtures. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a positioning fixture for testing welded joints of steel structures. It aims to improve the situation where some fixtures in the prior art are only applicable to a single type of joint and cannot meet diverse testing needs, thereby reducing the adaptability and flexibility of the fixtures.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a positioning fixture for inspecting welded joints of steel structures, comprising a fixed frame, a fixed plate fixedly connected to the top front side of the fixed frame, hydraulic rods fixedly connected to the left and right sides of the bottom wall of the fixed plate, a lifting plate fixedly connected to the bottom end of the hydraulic rods, a rear clamping plate fixedly connected to the front side of the fixed plate and the front side of the lifting plate, a limiting shell fixedly connected to one side of the rear clamping plate, a threaded rod rotatably connected to the rear inner wall of the limiting shell, a knob fixedly connected to the front end of the threaded rod, a front clamping plate threadedly connected to the outer wall of the knob, rubber pads fixedly connected to one side of the front clamping plate and one side of the rear clamping plate, and a cooling mechanism provided at the rear side of the fixed frame, the cooling mechanism being used to reduce the excessively high temperature after welded joint inspection.

[0006] As a further description of the above technical solution:

[0007] The cooling mechanism includes a variable frequency fan, the front side of which is fixedly connected to the rear side of the fixed frame. An extraction pipe is connected to the bottom right side of the variable frequency fan, and a filter box is connected to the right end of the extraction pipe. The front side of the filter box is fixedly connected to the right rear side of the fixed frame. A drying sponge board is slidably connected inside the filter box. A conveying pipe is connected to the top right side of the variable frequency fan, and a multi-hole nozzle is connected to the front end of the conveying pipe. The rear side of the multi-hole nozzle is fixedly connected to the right front side of the fixed frame.

[0008] As a further description of the above technical solution:

[0009] The cooling mechanism also includes a rubber ring, the inner wall of which is fixedly connected to the right end of the outer wall of the extraction tube, and the outer wall of which is fixedly connected to the left side of the filter box.

[0010] As a further description of the above technical solution:

[0011] A control switch is fixedly connected to the left side of the mounting bracket, and the control switch is electrically connected to the hydraulic rod and the variable frequency fan respectively.

[0012] As a further description of the above technical solution:

[0013] A sliding plate is fixedly connected to the bottom of the lifting plate, and a limit groove is opened at the bottom front side of the fixed frame. The rear side of the sliding plate is slidably connected to the limit groove.

[0014] As a further description of the above technical solution:

[0015] A handle is fixedly connected to the rear side of the dried sponge board, and a rubber sleeve is fixedly connected to the middle of the handle.

[0016] As a further description of the above technical solution:

[0017] Multiple rubber blocks are fixedly connected to the outer walls of the two knobs, and the outer walls of the multiple rubber blocks are arranged in an equidistant ring.

[0018] As a further description of the above technical solution:

[0019] The bottom left and right sides of the fixed frame are fixedly connected to support frames, and the bottom front and rear sides of the support frames are fixedly connected to corner protectors.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the distance between the two front clamping plates and the rear clamping plate is adjusted by raising and lowering the lifting plate. Then, under the rotation of the knob, the threaded rod drives the front clamping plate to move horizontally under the restriction of the limiting shell. This allows the positioning fixture to adapt to welding joints of different specifications, avoiding the inability to meet diverse testing needs, and thus improving the adaptability and flexibility of the fixture.

[0022] 2. In this utility model, the variable frequency fan is started to draw filtered air through the filter box. The airflow then passes through the drying sponge plate to complete the drying. Subsequently, under the output of the multi-hole nozzle, the filtered and dried airflow can cool the joint after processing, reducing the high temperature at the interface after testing. Attached Figure Description

[0023] Figure 1 This is a perspective view of the positioning fixture for inspecting welded joints of steel structures proposed in this utility model;

[0024] Figure 2 This is a front view of the positioning fixture for inspecting welded joints of steel structures proposed in this utility model;

[0025] Figure 3 This is a top view of the positioning fixture for inspecting welded joints of steel structures proposed in this utility model;

[0026] Figure 4 This is an exploded view of the threaded rod of the positioning fixture for testing welded joints of steel structures proposed in this utility model;

[0027] Figure 5 This is a schematic diagram of the cooling mechanism of the positioning fixture for testing welded joints of steel structures proposed in this utility model.

[0028] Legend:

[0029] 1. Fixing frame; 2. Cooling mechanism; 201. Variable frequency fan; 202. Extraction pipe; 203. Filter box; 204. Drying sponge board; 205. Conveying pipe; 206. Multi-hole nozzle; 207. Rubber ring; 208. Handle; 209. Rubber sleeve; 3. Fixing plate; 4. Hydraulic rod; 5. Lifting plate; 6. Rear clamping plate; 7. Limiting shell; 8. Threaded rod; 9. Knob; 10. Rubber block; 11. Front clamping plate; 12. Rubber pad; 13. Sliding plate; 14. Limiting groove; 15. Control switch; 16. Support frame; 17. Corner protector. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 , Figure 2 and Figure 4 This utility model provides an embodiment of a positioning fixture for inspecting welded joints in steel structures, comprising a fixed frame 1, a fixed plate 3 fixedly connected to the top front side of the fixed frame 1, hydraulic rods 4 fixedly connected to the left and right sides of the bottom wall of the fixed plate 3, and a lifting plate 5 fixedly connected to the bottom end of the hydraulic rods 4. Driven by the bottom end of the hydraulic rods 4, the lifting plate 5 is raised and lowered, thereby causing the bottom front clamping plate 11 and rear clamping plate 6 to rise and fall synchronously. Rear clamping plates 6 are fixedly connected to the front side of both the fixed plate 3 and the lifting plate 5, and a [missing information - likely a component or component] is fixedly connected to one side of the rear clamping plate 6. The limiting shell 7 has a threaded rod 8 rotatably connected to the rear side of its inner wall. A knob 9 is fixedly connected to the front end of the threaded rod 8. By rotating the knob 9, the threaded rod 8 drives the front clamping plate 11 to move horizontally. The outer wall of the knob 9 is threadedly connected to the front clamping plate 11, so that the device can adapt to welding joints of different specifications. Rubber pads 12 are fixedly connected to one side of the front clamping plate 11 and one side of the rear clamping plate 6. A cooling mechanism 2 is provided on the rear side of the fixing frame 1. The cooling mechanism 2 is used to reduce the excessive temperature of the welding joint after inspection.

[0032] Specifically, by activating the hydraulic rod 4, the bottom end of the hydraulic rod 4 can drive the lifting plate 5 to rise and fall, thereby adjusting the vertical distance between the two front clamping plates 11 and the rear clamping plate 6 to accommodate welding joints of different heights. Then, by rotating the knob 9, the threaded rod 8 will rotate accordingly. During the rotation of the threaded rod 8, the front clamping plate 11 will be moved horizontally under the restriction of the limiting shell 7, thereby allowing the adjustment of the horizontal distance between the front clamping plate 11 and the rear clamping plate 6. This ensures that the positioning fixture can adapt to welding joints of various specifications, thus avoiding the limitation of the fixture not being able to meet diverse testing needs, thereby improving the adaptability and flexibility of the fixture.

[0033] Reference Figure 1 , Figure 3 and Figure 5The cooling mechanism 2 includes a variable frequency fan 201. The front side of the variable frequency fan 201 is fixedly connected to the rear side of the fixed frame 1. The bottom right side of the variable frequency fan 201 is connected to an extraction pipe 202. The right end of the extraction pipe 202 is connected to a filter box 203. When the variable frequency fan 201 is started, it draws in and filters the outside air through the filter box 203, so that larger particles in the air can be filtered. The front side of the filter box 203 is fixedly connected to the rear right end of the fixed frame 1. A drying sponge plate 204 is slidably connected inside the filter box 203, so that the moisture in the air can be dried through the connection of the drying sponge plate 204. The top right side of the variable frequency fan 201 is connected to a conveying pipe 205. The front end of the conveying pipe 205 is connected to a multi-hole nozzle 206. Then the filtered and dried airflow is sprayed through the multi-hole nozzle 206. The rear side of the multi-hole nozzle 206 is fixedly connected to the front right end of the fixed frame 1.

[0034] Specifically, by starting the variable frequency fan 201, outside air is drawn in through the extraction pipe 202 and filter box 203, and this air is filtered. Larger particles in the air are effectively removed. The purified airflow passes through the drying sponge plate 204 for further drying, ensuring that the air is dry and effectively preventing moisture from adversely affecting the cooling joint. With the continuous operation of the variable frequency fan 201, the filtered and dried airflow is output through the multi-hole nozzle 206. The function of the multi-hole nozzle 206 is to spray the filtered and dried airflow, thereby effectively cooling the tested joint. In this way, the high temperature at the interface after testing can be reduced, thus extending its service life.

[0035] Reference Figure 1 , Figure 4 and Figure 5 The cooling mechanism 2 also includes a rubber ring 207. The inner wall of the rubber ring 207 is fixedly connected to the right end of the outer wall of the extraction pipe 202, and the outer wall of the rubber ring 207 is fixedly connected to the left side of the filter box 203. A control switch 15 is fixedly connected to the left side of the fixing frame 1. The control switch 15 is electrically connected to the hydraulic rod 4 and the variable frequency fan 201 respectively. A sliding plate 13 is fixedly connected to the bottom of the lifting plate 5. A limit groove 14 is opened at the bottom front side of the fixing frame 1, and the rear side of the sliding plate 13 is slidably connected to the limit groove 14.

[0036] Specifically, the rubber ring 207 protects the connection at the right end of the extraction tube 202, thereby reducing wear on the extraction tube 202. The control switch 15, which is electrically connected to the hydraulic rod 4 and the variable frequency fan 201 respectively, can open and close the device. The sliding plate 13 is slidably connected to the limit groove 14 at the rear, which improves the stability of the lifting plate 5 when it is raised or lowered.

[0037] Reference Figure 1 , Figure 2 and Figure 3 A handle 208 is fixedly connected to the rear side of the dry sponge board 204, and a rubber sleeve 209 is fixedly connected to the middle of the handle 208; multiple rubber blocks 10 are fixedly connected to the outer walls of the two knobs 9, and the outer walls of the multiple rubber blocks 10 are arranged in an equidistant ring; a support frame 16 is fixedly connected to the bottom left and right sides of the fixed frame 1, and corner protectors 17 are fixedly connected to the bottom front and rear sides of the support frame 16.

[0038] Specifically, the connection of the rubber sleeve 209 improves the anti-slip effect when using the handle 208, the connection of multiple rubber blocks 10 improves the static friction of the knob 9, and the support frame 16 and corner protector 17 improve the stability of the clamp during use.

[0039] Working principle: When in use, the hydraulic rod 4 is activated, which drives the lifting plate 5 to rise and fall. At the same time, the vertical distance between the two front clamping plates 11 and the rear clamping plate 6 is adjusted to accommodate welding joints of different heights. Then, the threaded rod 8 is rotated by the knob 9, which drives the front clamping plate 11 to move horizontally under the restriction of the limiting shell 7. This adjusts the horizontal distance between the front clamping plate 11 and the rear clamping plate 6, allowing the positioning fixture to adapt to welding joints of different specifications. This avoids situations where the fixture cannot meet diverse testing needs, thereby improving the adaptability and flexibility of the fixture.

[0040] Furthermore, by starting the variable frequency fan 201, it draws in and filters the outside air through the extraction pipe 202 and the filter box 203, thereby removing larger particles in the air. Then, the airflow passes through the drying sponge plate 204 to complete the drying, achieving the purpose of drying the air and avoiding the influence of water vapor on the cooling joint. Subsequently, under the operation of the variable frequency fan 201, the filtered and dried airflow is output through the multi-hole nozzle 206, so that the filtered and dried airflow can cool the joint after testing, reducing the high temperature at the interface after testing.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning fixture for testing a welded joint of a steel structure, comprising a fixed frame (1), characterized in that: The front side top of the fixing frame (1) is fixedly connected with a fixed plate (3), the bottom wall left and right sides of the fixed plate (3) are fixedly connected with hydraulic rods (4), the bottom ends of the hydraulic rods (4) are fixedly connected with lifting plates (5), the front sides of the fixed plate (3) and the lifting plates (5) are fixedly connected with rear clamping plates (6), one side of the rear clamping plate (6) is fixedly connected with a limiting shell (7), the inner wall rear side of the limiting shell (7) is rotatably connected with a threaded rod (8), the front end of the threaded rod (8) is fixedly connected with a knob (9), the outer wall of the knob (9) is threadedly connected with a front clamping plate (11), one side of the front clamping plate (11) and one side of the rear clamping plate (6) are fixedly connected with rubber pads (12), and the rear side of the fixing frame (1) is provided with a cooling mechanism (2).

2. The positioning jig for inspecting a welded joint of a steel structure according to claim 1, characterized in that: The cooling mechanism (2) comprises a variable frequency fan (201), the front side of the variable frequency fan (201) is fixedly connected to the rear side of the fixing frame (1), the right side bottom of the variable frequency fan (201) is communicated with a suction pipe (202), the right end of the suction pipe (202) is communicated with a filter box (203), the front side of the filter box (203) is fixedly connected to the rear side right end of the fixing frame (1), the inside of the filter box (203) is slidably connected with a dry sponge plate (204), the right side top of the variable frequency fan (201) is communicated with a conveying pipe (205), the front end of the conveying pipe (205) is communicated with a porous spray head (206), and the rear side of the porous spray head (206) is fixedly connected to the front side right end of the fixing frame (1).

3. The positioning fixture for inspection of a welded joint of a steel structure according to claim 2, characterized in that: The cooling mechanism (2) further comprises a rubber ring (207), the inner wall of the rubber ring (207) is fixedly connected to the outer wall right end of the suction pipe (202), and the outer wall of the rubber ring (207) is fixedly connected to the left side of the filter box (203).

4. The positioning jig for inspecting a welded joint of a steel structure according to claim 2, characterized in that: The left side of the fixing frame (1) is fixedly connected with a control switch (15), and the control switch (15) is electrically connected with the hydraulic rods (4) and the variable frequency fan (201) respectively.

5. The positioning fixture for inspection of a welded joint of a steel structure according to claim 1, characterized in that: The bottom of the lifting plate (5) is fixedly connected with a sliding plate (13), the front side bottom of the fixing frame (1) is provided with a limiting groove (14), and the rear side of the sliding plate (13) is slidably connected with the limiting groove (14).

6. The positioning fixture for inspection of a welded joint of a steel structure according to claim 2, characterized in that: The rear side of the dry sponge plate (204) is fixedly connected with a handle (208), and the middle of the handle (208) is fixedly connected with a rubber sleeve (209).

7. The positioning fixture for inspection of a welded joint of a steel structure according to claim 1, characterized in that: The outer walls of the two knobs (9) are fixedly connected with a plurality of rubber blocks (10), and the outer walls of the plurality of rubber blocks (10) are arranged in an equidistant annular manner.

8. The positioning fixture for inspection of a welded joint of a steel structure according to claim 1, characterized in that: The bottom left and right sides of the fixing frame (1) are fixedly connected with support frames (16), and the bottom front and rear sides of the support frames (16) are fixedly connected with angle protection pads (17).

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