Telescopic gap detection auxiliary equipment for studying durability of bridge expansion joint

Abstract

The invention relates to an expansion joint detection auxiliary device for bridge expansion joint durability research, and the device comprises a machine head part which is disposed on a telescopic shaft of a fatigue testing machine, and can clamp an expansion joint main beam and drive the expansion joint main beam to shake up and down; the conversion locking parts are arranged on the rack of the fatigue testing machine in two groups, and the conversion locking parts can penetrate into the expansion joint main beam and vertically lock the expansion joint main beam; the expansion joint main beam is supported, laterally abutted and vertically positioned through the conversion locking part, and the expansion joint main beam is transversely positioned at multiple points through the multi-point fastening part, so that the expansion joint main beam cannot move in the front-back direction and the left-right direction in the compression and stretching detection process, and the stability of the expansion joint main beam in the durability detection process is ensured; and the machine head part can be clamped with the expansion joint main beam, so that the lifting and shaking track of the expansion joint main beam is limited, and the expansion joint main beam can synchronously complete detection work along with the moving process of the machine head part.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, specifically to auxiliary equipment for testing expansion joint gaps in bridge expansion joint durability performance studies. Background Technology

[0002] Bridges are important transportation facilities connecting two banks, and expansion joints are a key component of bridges. They can withstand enormous pressure and deformation during the expansion and contraction of the bridge structure, ensuring the stability and safety of the bridge. The inspection of bridge expansion joints is an important part of ensuring the safe operation and maintenance of bridges. The materials of expansion joints should have durability and good elastic deformation capacity. Their performance tests include tests on indicators such as elastic modulus, tensile strength, and weather resistance to ensure that the quality of expansion joint materials meets the requirements and that the expansion joints can guarantee long-term use. The following problems exist with existing expansion joints.

[0003] Existing bridge expansion joint testing devices cannot quickly complete the positioning of bridge expansion joints of different sizes in various directions, making the bridge expansion joint gap durability testing process unstable and affecting the accuracy of the test data. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the technical problem that the existing bridge expansion joint detection device cannot quickly complete the positioning of bridge expansion joints of different sizes in various directions, and to provide an auxiliary device for detecting expansion joint gaps for the study of the durability performance of bridge expansion joints.

[0005] The technical solution adopted by this invention to solve its technical problem is: an auxiliary device for detecting expansion joint gaps in bridge expansion joint durability research, comprising:

[0006] The machine head is mounted on the telescopic shaft of the fatigue testing machine, and the machine head can engage with the main beam of the expansion joint and drive the main beam of the expansion joint to sway up and down.

[0007] The changing locking part is arranged in two sets on the frame of the fatigue testing machine, and the changing locking part can penetrate into the main beam of the expansion joint and vertically lock the main beam of the expansion joint.

[0008] A multi-point fastening part is provided on the frame of the fatigue testing machine, and the multi-point fastening part is capable of laterally locking the expansion joint main beam.

[0009] When the machine head, the changing locking part, and the multi-point fastening part lock the expansion joint main beam, the expansion joint main beam can be stably detected.

[0010] Furthermore, the machine head includes a fixed frame mounted on the telescopic shaft of the fatigue testing machine, a support shaft rotatably mounted on the fixed frame, and two swashplates mirror-mounted on the support shaft;

[0011] The support shaft can drive the two inclined plates to rotate, so that the expansion joint main beam is engaged between the two inclined plates.

[0012] Furthermore, the machine head also includes a polygonal column disposed at the lower end of the support shaft, a polygonal bushing disposed outside the polygonal column with clearance fit, and a polygonal positioning groove disposed outside the lower end of the fixed frame.

[0013] The shape of the polygonal positioning groove matches the shape of the polygonal bushing.

[0014] The polygonal bushing can be inserted into the polygonal positioning groove along the polygonal column, so that the support shaft drives the two swashplates to lock.

[0015] Furthermore, the transformation locking part includes a support frame disposed on the frame of the fatigue testing machine, a movable circular hole disposed on the support frame, and a movable circular frame rotatably disposed on the movable circular hole;

[0016] The inner wall of the movable circular frame is arranged in a frame shape with four cut surfaces;

[0017] The expansion joint main beam can be inserted into the movable circular frame and rotate with it.

[0018] Furthermore, the horizontal axis of the movable circular frame is collinear with the horizontal axis separating the two inclined plates;

[0019] The expansion joint main beam can maintain a horizontal position.

[0020] Furthermore, the transformation locking part also includes two horizontal holes disposed on the support frame and communicating with the movable circular hole, two first fastening bolts inserted through the two horizontal holes, and four threaded holes arranged circumferentially on the four cut surfaces;

[0021] The first fastening bolt can be spirally passed through the horizontal hole and out of the threaded hole, and then abut against the expansion joint main beam.

[0022] Furthermore, the multi-point fastening part includes a manual operating column rotatably mounted on the frame of the fatigue testing machine, a plurality of threaded segments mounted on the manual operating column, and a plurality of abutting parts matched on the plurality of threaded segments.

[0023] The thread directions of two adjacent threaded segments are opposite.

[0024] Furthermore, the contact part includes a sliding plate slidably disposed on the frame of the fatigue testing machine, and a toggle post rotatably disposed on the sliding plate;

[0025] Each of the sliding plates is matched and interlocked with the threaded segments.

[0026] When the manual operating column rotates, the threaded segments can drive the sliding plates to move, so that each pair of adjacent actuating columns moves away from each other.

[0027] Furthermore, the multi-point fastening part also includes several connecting shafts arranged in a straight line on the frame of the fatigue testing machine, and two side frames arranged in an X shape on each of the connecting shafts;

[0028] The transverse axes of the two side frames are collinear with the dividing transverse axes of the two swashplates;

[0029] The two actuating columns can push the two side frames in opposite directions, so that the two side frames rotate and press and lock the expansion joint main beam.

[0030] Furthermore, the ends of the two side frames furthest from the connecting axis are hinged to a movable shaft.

[0031] The beneficial effects of this invention are that, compared with the prior art, by changing the locking part to support and laterally abut against the vertical positioning of the expansion joint main beam, and by using the multi-point fastening part to position the expansion joint main beam at multiple points in the lateral direction, the expansion joint main beam cannot move in the front-back and left-right directions during compression and tension testing, thus ensuring the stability of the expansion joint main beam during the durability testing process. In addition, the machine head can engage with the expansion joint main beam, limiting the lifting and shaking trajectory of the expansion joint main beam, allowing the expansion joint main beam to complete the testing work synchronously with the movement of the machine head, further improving the quality and effect of the testing work. Attached Figure Description

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Figure 1 This is a perspective view of a preferred embodiment of the present invention from a first perspective;

[0034] Figure 2 This is a perspective view of a preferred embodiment of the present invention from a second perspective;

[0035] Figure 3 This is a front view of a preferred embodiment of the present invention;

[0036] Figure 4 This is a perspective view of the transformation locking part of the present invention;

[0037] Figure 5 This is a perspective view of the multi-point fastening part of the present invention;

[0038] Figure 6 This is a first-view perspective perspective view of the nose section of the present invention;

[0039] Figure 7 This is a second-view perspective perspective view of the nose of the machine according to the present invention.

[0040] In the picture:

[0041] 1. Machine head; 11. Fixed frame; 12. Support shaft; 13. Swashplate; 14. Polygonal column; 15. Polygonal bushing; 16. Polygonal positioning groove; 2. Changing locking part; 21. Support frame; 22. Movable circular hole; 23. Movable circular frame; 24. Horizontal hole; 25. First fastening bolt; 26. Threaded hole; 3. Multi-point fastening part; 31. Manual operation column; 32. Threaded segment; 33. Abutment part; 331. Sliding plate; 332. Actuating column; 34. Connecting shaft; 35. Side frame; 4. Chamfered surface; 5. Movable shaft. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0043] like Figure 1-7 As shown, this invention provides an auxiliary device for detecting expansion joint gaps in bridge expansion joint durability studies, comprising:

[0044] The machine head 1 is mounted on the telescopic shaft of the fatigue testing machine. The fatigue testing machine can also be replaced with a hardness tester and a tensile testing machine, as long as it can perform performance testing on the expansion joint main beam to meet the fatigue testing requirements. Furthermore, the machine head 1 can engage the expansion joint main beam and cause it to move up and down.

[0045] The transformation locking part 2 is arranged in two sets on the frame of the fatigue testing machine. The transformation locking part 2 can penetrate into the main beam of the expansion joint and vertically lock the main beam of the expansion joint. The transformation locking part 2 initially supports the main beam of the expansion joint, and then can vertically lock the main beam of the expansion joint. This step is before the machine head 1.

[0046] The multi-point fastening part 3 is installed on the frame of the fatigue testing machine, and the multi-point fastening part 3 can lock the expansion joint main beam laterally. The expansion joint main beam must pass through the multi-point fastening part 3 without contacting it before the changing locking part 2 can be operated. After the multi-point fastening part 3 locks the expansion joint main beam laterally, the machine head 1 is then engaged and positioned with the multi-point fastening part 3.

[0047] When the machine head 1, the changing locking part 2, and the multi-point fastening part 3 lock the main beam of the expansion joint, the main beam of the expansion joint can be stably tested. Specifically, in the prior art, the durability test of bridge expansion joints generally uses a fatigue testing machine for frequent tension or compression. If the bridge expansion joint is too long, it is prone to swaying in all directions during the stress test, which may pose a safety hazard. Compared with the prior art, by using the changing locking part 2 to support and laterally abut against the vertical positioning of the main beam of the expansion joint, and by using the multi-point fastening part 3 to position the main beam of the expansion joint at multiple points in the lateral direction, the main beam of the expansion joint cannot be moved forward, backward, left, or right during compression and tension tests. Moving to the right ensures stability during the durability testing of the expansion joint main beam. The machine head 1 can engage with the expansion joint main beam, limiting its lifting and shaking trajectory. This allows the expansion joint main beam to complete the testing synchronously with the movement of the machine head 1, further improving the quality and effectiveness of the testing. During the testing process, the expansion joint main beam is frequently compressed or stretched, and its elasticity is tested at this stage. The expansion gap of the expansion joint repeatedly expands and contracts. Only after multiple cycles, if the expansion gap of the expansion joint remains in a state that meets the testing standards, can it be determined that it meets the testing quality requirements.

[0048] Preferably, the machine head 1 includes a fixed frame 11 mounted on the telescopic shaft of the fatigue testing machine, a support shaft 12 rotatably mounted on the fixed frame 11, the support shaft 12 being positioned near the inner vertical plate of the fixed frame 11 with reserved space for the expansion joint main beam, and two swashplates 13 mirror-mounted on the support shaft 12, the swashplates 13 being connected to the support shaft 12 at an eccentric position.

[0049] The support shaft 12 can drive the two swashplates 13 to rotate, so that the expansion joint main beam is engaged between the two swashplates 13. Specifically, the two swashplates 13 are shaped like a transverse V-shape facing the outside of the fixed frame 11, and the opening distance between the two swashplates 13 gradually decreases from the outside to the inside. The two swashplates 13 can gradually tighten the distance with the expansion joint main beam as the support shaft 12 rotates synchronously, so that the expansion joint main beam is in close contact with the gradually decreasing opening gap of the two swashplates 13, thus quickly realizing the detection and engagement state of the expansion joint main beam and improving its working efficiency. The device can be engaged with expansion joint main beams of different thicknesses by adjusting the rotation angle of the two swashplates 13, increasing the flexibility and versatility of the device and expanding the detection range for expansion joint main beams of different specifications.

[0050] Preferably, the machine head 1 further includes a polygonal column 14 disposed at the lower end of the support shaft 12, a polygonal bushing 15 disposed outside the polygonal column 14 with clearance fit, and a polygonal positioning groove 16 disposed outside the lower end of the fixed frame 11.

[0051] The shape of the polygonal positioning groove 16 matches the shape of the polygonal bushing 15. The polygonal column 14, the polygonal bushing 15 and the polygonal positioning groove 16 include, but are not limited to, square, hexagonal, octagonal and dodecagonal shapes.

[0052] The polygonal bushing 15 can be inserted into the polygonal positioning groove 16 along the polygonal column 14, so that the support shaft 12 drives the two swashplates 13 to lock. Specifically, when the support shaft 12 drives the two swashplates 13 to rotate, the polygonal bushing 15 maintains a height on the polygonal column 14 based on the positioning force that does not affect the rotation of the support shaft 12. When the angle needs to be locked after the rotation of the support shaft 12 is completed, the polygonal bushing 15 can be moved along the polygonal column 14 and inserted into the polygonal positioning groove 16 for connection. The polygonal bushing 15 needs to be partially inserted out of the polygonal positioning groove 16 for easy insertion and removal operations when used again. After the polygonal bushing 15 is inserted into the polygonal positioning groove 16, the support shaft 12 can no longer rotate, so that the two swashplates 13 are firmly connected to the expansion joint main beam.

[0053] Preferably, the transformation locking part 2 includes a support frame 21 mounted on the frame of the fatigue testing machine. The support frame 21 can support the main beam of the expansion joint at a suitable height, facilitating engagement with the machine head 1 and the multi-point fastening part 3.

[0054] The movable circular hole 22 is provided on the support frame 21, and the movable circular frame 23 is rotatably provided on the movable circular hole 22. The movable circular hole 22 provides space for the movable circular frame 23 to move.

[0055] The inner wall of the movable circular frame 23 is set in a frame shape with four cut surfaces 4, which facilitates the horizontal placement of the expansion joint main beam;

[0056] The expansion joint main beam can be inserted into the movable circular frame 23 and rotate with it. Specifically, the expansion joint main beam fits the cut surface 4 and can rotate with the movable circular frame 23, so that each surface of the expansion joint main beam can be durablely tested in a circumference, making the operation of flipping and switching the test surface of the expansion joint main beam flexible.

[0057] Preferably, the horizontal axis of the movable circular frame 23 is collinear with the horizontal axis separating the two inclined plates 13;

[0058] The expansion joint main beam can maintain a horizontal positioning. Specifically, it can maintain a balanced inspection angle in multiple positioning measures, avoiding the safety hazards caused by poor stress control due to oblique force on the expansion joint main beam.

[0059] Preferably, the transformation locking part 2 further includes two horizontal holes 24 disposed on the support frame 21 and communicating with the movable circular hole 22, and two first fastening bolts 25 inserted through the two horizontal holes 24.

[0060] And four threaded holes 26 arranged circumferentially on the four cut surfaces 4. The first fastening bolt 25 can be a half-thread bolt, with the cylindrical part inserted through the horizontal hole 24 and the threaded part inserted through the threaded hole 26.

[0061] The first fastening bolt 25 can spirally pass through the horizontal hole 24 and out of the threaded hole 26 to abut against the main beam of the expansion joint. Specifically, when the two first fastening bolts 25 are inserted into the two horizontal holes 24 and the two threaded holes 26, the rotation angle of the movable circular frame 23 is balanced and can no longer be adjusted. The main beam of the expansion joint will not experience angle deviation during the durability test, providing a safety guarantee for the test process of the main beam of the expansion joint. As the spiral insertion depth of the two first fastening bolts 25 in the two threaded holes 26 increases, they can abut against the main beam of the expansion joint in both lateral directions, preventing it from wobbling back and forth, further improving its stabilizing force. When the two first fastening bolts 25 are disengaged from two of the threaded holes 26, the movable circular frame 23 can be rotated to allow the two first fastening bolts 25 to be inserted into the other two threaded holes 26, so as to effectively achieve the angle locking work after the movable circular frame 23 drives the main beam of the expansion joint to switch angles.

[0062] Preferably, the multi-point fastening part 3 includes a manual operating column 31 rotatably mounted on the frame of the fatigue testing machine, a plurality of threaded segments 32 mounted on the manual operating column 31, and a plurality of abutting parts 33 matchedly mounted on the plurality of threaded segments 32.

[0063] The thread directions of two adjacent thread segments 32 are opposite. Specifically, the rotation of the manual operation column 31 can drive the rotation of several thread segments 32, so that the several thread segments 32 act on several contact parts 33 to achieve the position adjustment of several contact parts 33.

[0064] Preferably, the contact part 33 includes a sliding plate 331 slidably disposed on the frame of the fatigue testing machine, and a toggle post 332 rotatably disposed on the sliding plate 331;

[0065] Each of the sliding plates 331 is matched and interlocked with the threaded segments 32.

[0066] When the manual operating column 31 rotates, the threaded segments 32 can drive the sliding plates 331 to move, so that each pair of adjacent actuating columns 332 moves away from each other. Specifically, the sliding connection of the sliding plates 331 allows the sliding plates 331 to move radially based on the force of the threaded segments 32. Each pair of adjacent sliding plates 331 can move away from each other or move closer to each other based on this. Each pair of adjacent actuating columns 332 moves towards each other based on the movement of the two adjacent sliding plates 331, changing the direction of the force and facilitating the targeted force application of subsequent parts.

[0067] Preferably, the multi-point fastening part 3 further includes a plurality of connecting shafts 34 arranged in a straight line on the frame of the fatigue testing machine, and two side frames 35 arranged in an X shape on each of the connecting shafts 34. The connecting shafts 34 provide the preconditions for supporting the side frames 35 to move.

[0068] The transverse axes of the two side frames 35 are collinear with the dividing transverse axes of the two inclined plates 13, which ensures the balanced effect of the side frames 35 on the positioning force of the expansion joint main beam.

[0069] The two actuating columns 332 can push the two side frames 35 in opposite directions, so that the two side frames 35 rotate and press and lock the expansion joint main beam. Specifically, when the two actuating columns 332 push the two side frames 35, they can rotate to relieve frictional force, ensure the service life of the side frames 35, and reduce the probability of wear on the side frames 35. When the two opposing and far-away actuating columns 332 push the two side frames 35, the two side frames 35 expand and rotate so that their four points abut against the upper and lower ends of the expansion joint main beam, so that the expansion joint main beam cannot move left or right. There are multiple fixed points in one direction, which reduces the vibration amplitude of the expansion joint main beam during the inspection process and greatly ensures the quality of the inspection work.

[0070] Preferably, the ends of the two side frames 35 furthest from the connecting shaft 34 are hinged to a movable shaft 5. Specifically, the connecting shaft 34 can increase the stability of the connection between the two side frames 35 and avoid the problem of one end of the two side frames 35 collapsing and being damaged due to uneven force angle.

[0071] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An auxiliary device for detecting expansion joint gaps in bridge expansion joint durability performance research, characterized in that, include: The machine head (1) is set on the telescopic shaft of the fatigue testing machine, and the machine head (1) can engage the main beam of the expansion joint and drive the main beam of the expansion joint to shake up and down. The transformation locking part (2) is arranged in two sets on the frame of the fatigue testing machine, and the transformation locking part (2) can penetrate into the main beam of the expansion joint and vertically lock the main beam of the expansion joint. Multi-point fastening part (3), the multi-point fastening part (3) is provided on the frame of the fatigue testing machine, and the multi-point fastening part (3) can laterally lock the expansion joint main beam, wherein; When the machine head (1), the transformation locking part (2) and the multi-point fastening part (3) lock the expansion joint main beam, the expansion joint main beam can be stably detected.

2. The auxiliary equipment for detecting expansion joint gaps in bridge expansion joint durability performance research as described in claim 1, characterized in that, The machine head (1) includes a fixed frame (11) mounted on the telescopic shaft of the fatigue testing machine, a support shaft (12) rotatably mounted on the fixed frame (11), and two swashplates (13) mirror-mounted on the support shaft (12); The support shaft (12) can drive the two swashplates (13) to rotate so that the expansion joint main beam is engaged between the two swashplates (13).

3. The auxiliary equipment for detecting expansion joint gaps in bridge expansion joint durability performance research as described in claim 2, characterized in that, The machine head (1) also includes a polygonal column (14) disposed at the lower end of the support shaft (12), a polygonal bushing (15) disposed outside the polygonal column (14) with clearance fit, and a polygonal positioning groove (16) disposed outside the lower end of the fixed frame (11). The shape of the polygonal positioning groove (16) matches the shape of the polygonal bushing (15); The polygonal bushing (15) can be inserted into the polygonal positioning groove (16) along the polygonal column (14) so ​​that the support shaft (12) drives the two swashplates (13) to lock.

4. The auxiliary equipment for detecting expansion joint gaps in bridge expansion joint durability performance research as described in claim 3, characterized in that, The transformation locking part (2) includes a support frame (21) provided on the frame of the fatigue testing machine, a movable circular hole (22) provided on the support frame (21), and a movable circular frame (23) rotatably provided on the movable circular hole (22); The inner wall of the movable circular frame (23) is set in a frame shape on four cut surfaces (4); The expansion joint main beam can be inserted into the movable circular frame (23) and rotate with it.

5. The auxiliary equipment for detecting expansion joint gaps in bridge expansion joint durability performance research as described in claim 4, characterized in that, The horizontal axis of the movable circular frame (23) is collinear with the horizontal axis separating the two inclined plates (13); The expansion joint main beam can maintain a horizontal position.

6. The auxiliary equipment for detecting expansion joint gaps in bridge expansion joint durability performance research as described in claim 5, characterized in that, The transformation locking part (2) also includes two horizontal holes (24) provided on the support frame (21) and connected to the movable circular hole (22), two first fastening bolts (25) inserted in the two horizontal holes (24), and four threaded holes (26) arranged in a circle on the four cut surfaces (4); The first fastening bolt (25) can spirally pass through the horizontal hole (24) and out of the threaded hole (26) to abut against the expansion joint main beam.

7. The auxiliary equipment for detecting expansion joint gaps in bridge expansion joint durability performance research as described in claim 6, characterized in that, The multi-point fastening part (3) includes a manual operating column (31) rotatably mounted on the frame of the fatigue testing machine, a plurality of threaded segments (32) mounted on the manual operating column (31), and a plurality of abutting parts (33) matched on the plurality of threaded segments (32). The thread directions of two adjacent thread segments (32) are opposite.

8. The auxiliary equipment for detecting expansion joint gaps in bridge expansion joint durability performance research as described in claim 7, characterized in that, The contact part (33) includes a sliding plate (331) slidably disposed on the frame of the fatigue testing machine, and a toggle post (332) rotatably disposed on the sliding plate (331); Each of the sliding plates (331) is matched and interlocked with the threaded segments (32). When the manual operating column (31) rotates, the plurality of threaded segments (32) can drive the plurality of sliding plates (331) to move, so that each pair of adjacent actuating columns (332) move away from each other.

9. The auxiliary equipment for detecting expansion joint gaps in bridge expansion joint durability performance research as described in claim 8, characterized in that, The multi-point fastening part (3) also includes several connecting shafts (34) arranged in a straight line on the frame of the fatigue testing machine, and two side frames (35) arranged in an X shape on each of the connecting shafts (34); The transverse axes of the two side frames (35) are collinear with the dividing transverse axes of the two swashplates (13); The two actuating columns (332) can push the two side frames (35) in opposite directions so that the two side frames (35) rotate and press and lock the expansion joint main beam.

10. The auxiliary equipment for detecting expansion joint gaps in bridge expansion joint durability performance research as described in claim 8, characterized in that, The two side frames (35) are hinged to a movable shaft (5) at one end away from the connecting shaft (34).

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