Highway bridge expansion joint compression test device

Abstract

The invention discloses a highway bridge expansion joint compression test device, and belongs to the field of expansion joint test devices.The highway bridge expansion joint compression test device comprises a test bed, two sliding rails are symmetrically fixed to the top of the test bed, two limiting mechanisms symmetrically slide on the sliding rails, and an L-shaped supporting seat is fixed to the middle of the back face of the test bed; a hydraulic cylinder is installed in the middle of the top of the L-shaped supporting seat, the output end of the hydraulic cylinder extends to the position over the test bed and is fixedly provided with a pressure testing mechanism, the pressure testing mechanism comprises a fixing plate, the fixing plate is fixedly connected with the output end of the hydraulic cylinder, and three sets of hollow-square-shaped pressing frames are fixed to the bottom face of the fixing plate at equal intervals; the connecting plates are arranged between the two adjacent hollow-square-shaped pressing frames; the fixed frame is fixedly connected to one end of the bottom of the connecting plate. According to the invention, under the stable pressure, the condition that the vehicle performs rolling test on the expansion joint under different conditions is simulated, so that the accuracy of testing the compression resistance of the expansion joint is improved.

Description

Technical Field

[0001] The present application relates to the field of expansion joint testing devices, and in particular to a compression testing device for expansion joints of highway bridges. Background Art

[0002] The expansion joint of a highway bridge is a device installed in the gap formed between two adjacent beams to meet the requirements of bridge deck deformation. The beam can be a main beam section or an abutment connected to the main beam. The expansion joint of the bridge is required to be able to freely expand and contract in both the length and width directions of the bridge, and to be firm and reliable. When vehicles pass through, it should be smooth, without sudden jumps and noise. The compressive performance of the expansion joint is an important factor in ensuring driving safety and service life.

[0003] Existing highway bridge expansion joint compression test devices are generally a combined expansion joint test device for highway bridges as shown in authorization announcement No. CN215574270U. After clamping the beam expansion, the beam expansion is vertically pressed by the pressure test device, thereby achieving the test effect of the expansion joint. However, in actual use, it will be crushed by vehicles. Therefore, when performing the compression test on the expansion joint, it is necessary to consider the compression test when the vehicle is crushing the expansion joint, so as to ensure the accuracy of the expansion joint compression test. Therefore, the present invention provides a highway bridge expansion joint compression test device. Summary of the Invention

[0004] The main purpose of this application is to provide a compression test device for expansion joints of highway bridges, which improves the accuracy of compression testing of expansion joints by simulating the situation of vehicles rolling over expansion joints under different conditions under stable pressure.

[0005] To achieve the above-mentioned purpose, the present application provides a highway bridge expansion joint compression test device, comprising a test bench, wherein two slide rails are symmetrically fixed to the top of the test bench, and two limit mechanisms slide symmetrically on the slide rails, an L-shaped support seat is fixed at the middle position of the back of the test bench, and a hydraulic cylinder is installed at the middle position of the top of the L-shaped support seat, the output end of the hydraulic cylinder extends to the top of the test bench and is fixed with a pressure test mechanism, and the pressure test mechanism includes: A fixed plate is fixedly connected to the output end of the hydraulic cylinder, and three sets of U-shaped pressing frames are fixed at equal intervals on the bottom surface of the fixed plate, and a pressure sensor is installed at the bottom of the U-shaped pressing frame at the middle position; A connecting plate is provided between two adjacent U-shaped pressing frames and reciprocates along the front and rear ends of the fixing plate, and linear rolling pressing assemblies are fixed at equal intervals along the length direction of the bottom of the connecting plate; A fixed frame is fixedly connected to one end of the bottom of the connecting plate, and the fixed frame passes through the middle group of Chinese-shaped pressing frames, and oblique rolling pressing components are symmetrically arranged on the inner side of the fixed frame.

[0006] Preferably, the limit mechanism includes a limit seat, and a slide groove that can slide along the slide rail is symmetrically arranged at the bottom of the limit seat, and a movable groove is symmetrically opened on the top of the limit seat, and the interior of the movable groove is rotatably connected to a screw rod 1, and a limit block is slidably connected to the two screw rods 1, and a driving motor 1 for driving the screw rod 1 to rotate is installed at the end of the limit seat, and an electric telescopic rod for driving the limit seat to move is installed on the side of the limit seat.

[0007] Preferably, a screw rod three and a sliding rod are respectively installed at the bottom of the fixed plate between the two adjacent U-shaped pressing frames, and a screw rod seat and a sliding rod corresponding to each other are sleeved on the screw rod three and the sliding rod, and the screw rod seat and the sliding rod are fixed to the corresponding connecting plate, and a driving motor two for driving the screw rod three to rotate is installed at the end position of the screw rod three.

[0008] Preferably, the linear rolling pressing assembly includes a U-shaped fixing seat fixed to the bottom of the connecting plate through a support rod, and pressing wheels 1 are installed at both ends of the U-shaped fixing seat.

[0009] Preferably, the groove of the U-shaped fixing seat is connected to a rotating disk via a bearing, and pressing rollers are installed on the bottom surface of the rotating disk at equal intervals along its circumferential direction.

[0010] Preferably, the oblique rolling pressing assembly includes two groups of screw rods 2 installed on the inner side of the fixed frame, and a driving motor 3 for driving the two groups of screw rods 2 to rotate is installed at the end of the fixed frame. The screw rods 2 are each provided with an L-shaped screw rod seat that matches the screw rod 2, and a pressing wheel 2 is installed at the bottom of the L-shaped screw rod seat through a bearing.

[0011] The benefits of the present application are as follows: first, a stable pressure is provided by the cooperation between the hydraulic cylinder and the U-shaped pressing frame, and this pressure can also be used to simulate the pressure generated by the vehicle's own weight. Subsequently, the second drive motor and the third drive motor respectively drive the screw rod three and the screw rod two to rotate, so that the screw rod seat slides along the screw rod three, and the L-shaped screw rod seat slides along the screw rod two. In this process, the screw rod seat is used to drive the connecting plate to move along the front and rear directions of the fixed plate, so that the expansion joint is rolled in a horizontal straight direction by a pair of pressing wheels, simulating the test of a vehicle rolling the expansion joint in a straight line, thereby improving the accuracy of the expansion joint compression test; Secondly, while the pressing wheel pair is rolling the expansion joint in the horizontal straight direction, since the rotating disk is rotatably connected to the U-shaped fixed seat, the pressing roller and the rotating disk roll in a spiral line in the horizontal straight direction during the rolling process of the pressing wheel, simulating the test of rolling the expansion joint when the vehicle changes lanes multiple times, thereby further improving the accuracy of the expansion joint compression test; Finally, during the movement of the connecting plate, the L-shaped screw seat moves along the screw rod 2, and since the pressing wheel 2 is connected to the L-shaped screw seat by a bearing, while the pressing wheel 1 rolls the expansion joint in the horizontal straight direction, the pressing wheel 2 rolls in the horizontal oblique direction between the two adjacent U-shaped pressing frames, simulating the test of the vehicle rolling on the expansion joint during the lane change process, thereby better testing the accuracy of the expansion joint's compressive resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings that constitute part of this application are used to provide a further understanding of this application and make other features, objects and advantages of this application more apparent. The illustrative embodiment drawings of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 It is a schematic structural diagram of the limiting mechanism of the present invention.

[0014] Figure 3 It is a schematic structural diagram of the entire pressure testing mechanism of the present invention from the first perspective.

[0015] Figure 4 yes Figure 3 Enlarged structural diagram at point A in the middle.

[0016] Figure 5 It is a schematic structural diagram of the overall pressure testing mechanism of the present invention from a second viewing angle.

[0017] Figure 6 It is a schematic structural diagram of the pressure testing mechanism of the present invention from a third viewing angle.

[0018] In the figure above, 100, test bench; 110, slide rail; 120, L-shaped support seat; 200, limit mechanism; 201, drive motor 1; 202, limit block; 203, moving slot; 204, screw rod 1; 205, electric telescopic rod; 206, slide; 207, limit seat; 300, hydraulic cylinder; 400, pressure test mechanism; 401, drive motor 2; 402, screw rod seat; 403, Fixed frame; 404, screw rod 2; 405, connecting plate; 406, U-shaped fixing seat; 407, pressing wheel 1; 408, rotating disk; 409, pressing roller; 410, pressure sensor; 411, U-shaped pressing frame; 412, pressing wheel 2; 413, L-shaped screw rod seat; 414, fixing plate; 415, slider; 416, driving motor 3; 417, screw rod 3; 418, sliding rod. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments 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, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0020] 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 to describe the embodiments of the present application 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 that includes 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.

[0021] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0022] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0023] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this 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.

[0025] See also Figures 1-6 This embodiment provides a compression test device for expansion joints of highway bridges, including a test bench 100. Two slide rails 110 are symmetrically fixed to the top of the test bench 100, and two limit mechanisms 200 slide symmetrically on the slide rails 110. An L-shaped support seat 120 is fixed at the middle position of the back of the test bench 100, and a hydraulic cylinder 300 is installed at the middle position of the top of the L-shaped support seat 120. The output end of the hydraulic cylinder 300 extends to the top of the test bench 100 and is fixed with a pressure test mechanism 400. The pressure test mechanism 400 includes: A fixed plate 414 is fixedly connected to the output end of the hydraulic cylinder 300, and three sets of U-shaped pressing frames 411 are fixed at equal intervals on the bottom surface of the fixed plate 414, and a pressure sensor 410 is installed at the bottom of the U-shaped pressing frame 411 at the middle position; The connecting plate 405 is disposed between two adjacent U-shaped pressing frames 411 and reciprocates along the front and rear ends of the fixing plate 414. Linear rolling pressing assemblies are fixed at equal intervals along the length of the bottom of the connecting plate 405. The fixed frame 403 is fixedly connected to one end of the bottom of the connecting plate 405 , and the fixed frame 403 passes through the middle group of U-shaped pressing frames 411 , and oblique rolling pressing components are symmetrically arranged on the inner side of the fixed frame 403 .

[0026] like Figure 1 and Figure 2As shown, in this embodiment, the limiting mechanism 200 includes a limiting seat 207, and a slide groove 206 that can slide along the slide rail 110 is symmetrically provided at the bottom of the limiting seat 207, and a moving groove 203 is symmetrically opened on the top of the limiting seat 207, and the interior of the moving groove 203 is rotatably connected to a screw rod 204, and the limiting block 202 is slidably connected to the two screw rods 204, and a driving motor 201 for driving the screw rod 204 to rotate is installed at the end of the limiting seat 207, and a drive motor 201 for driving the screw rod 204 to rotate is installed on the side of the limiting seat 207. The electric telescopic rod 205 that drives the limit seat 207 to move, when in use, first adjusts the distance between the two limit seats 207 through the electric telescopic rod 205 according to the length of the expansion joint. After adjusting to the appropriate position, the two ends of the expansion joint are respectively placed on the two limit seats 207, and then the external power supply provides power support for the driving motor 1 201, and the driving motor 1 201 drives the screw rod 1 204 to rotate, and uses the two screw rods 1 204 with opposite threads to move the limit block 202 to the middle, thereby clamping and fixing the expansion joint.

[0027] like Figure 3 、 Figure 5 and Figure 6 As shown, in this embodiment, a screw rod 3 417 and a slide rod 418 are respectively installed at the bottom of the fixed plate 414 between the two adjacent U-shaped pressing frames 411, and a screw rod seat 402 and a slider 415 corresponding to each other are sleeved on the screw rod 3 417 and the slider 418, and the screw rod seat 402 and the slider 415 are fixed to the corresponding connecting plate 405, and a driving motor 2 401 for driving the screw rod 3 417 to rotate is installed at the end position of the screw rod 3 417. When in use, the screw rod 3 417 is driven to rotate by the driving motor 2 401, so that the screw rod seat 402 slides along the screw rod 3 417, and the slider 415 slides along the slider 418, and the screw rod seat 402 is used to drive the two connecting plates 405 to move forward and backward along the fixed plate 414.

[0028] like Figure 3 、 Figure 5 and Figure 6 As shown, in this embodiment, the linear rolling pressing assembly includes a U-shaped fixing seat 406 fixed to the bottom of the connecting plate 405 through a support rod, and pressing wheels 407 are installed at both ends of the U-shaped fixing seat 406. When in use, the connecting plate 405 moves along the front and rear directions of the fixing plate 414, so that the expansion joint is rolled in a horizontal linear direction by the pressing wheel 407, simulating the test of a vehicle rolling the expansion joint in a straight line, thereby improving the accuracy of the expansion joint compression test.

[0029] like Figure 3 and Figure 4As shown, in this embodiment, a rotating disk 408 is connected to the groove of the U-shaped fixing seat 406 through a bearing, and pressing rollers 409 are installed on the bottom surface of the rotating disk 408 at equal intervals along its circumferential direction. When in use, the expansion joint is rolled in a horizontal straight line direction by the pressing wheel 1 407. Since the rotating disk 408 is rotatably connected to the U-shaped fixing seat 406, during the rolling process of the pressing wheel 1 407, the pressing roller 409 and the rotating disk 408 roll in a spiral line in the horizontal straight line direction, simulating the test of rolling the expansion joint when the vehicle changes lanes multiple times, thereby further improving the accuracy of the expansion joint compression test.

[0030] like Figure 3 、 Figure 5 and Figure 6 As shown, in this embodiment, the diagonal rolling pressing assembly includes two sets of screw rods 2 404 installed on the inner side of the fixed frame 403, and a driving motor 3 416 for driving the two sets of screw rods 2 404 to rotate is installed at the end of the fixed frame 403, and the screw rods 2 404 are each provided with an L-shaped screw rod seat 413 matching the screw rod 2 404, and a pressing wheel 2 412 is installed at the bottom of the L-shaped screw rod seat 413 through a bearing. When in use, during the movement of the connecting plate 405, the L-shaped screw rod seat 413 moves along the screw rod 2 404, and since the pressing wheel 2 412 is connected to the L-shaped screw rod seat 413 through a bearing, while the pressing wheel 1 407 rolls the expansion joint in a horizontal straight direction, the pressing wheel 2 412 rolls in a horizontal diagonal direction between the two adjacent U-shaped pressing frames 411, simulating the test of the vehicle rolling the expansion joint during the lane change process, thereby better testing the accuracy of the expansion joint's compressive resistance.

[0031] In summary: When in use, first, according to the length of the expansion joint, the distance between the two limit seats 207 is adjusted by the electric telescopic rod 205. After adjusting to the appropriate position, the two ends of the expansion joint are placed on the two limit seats 207 respectively. Then, an external power supply is used to provide power support for the driving motor 1 201, and the driving motor 1 201 drives the screw rod 1 204 to rotate, and the two screw rods 1 204 with opposite threads are used to move the limit block 202 toward the middle, thereby clamping and fixing the expansion joint; Then, the hydraulic cylinder 300 drives the pressure test mechanism 400 to move downward, thereby using the pressure test mechanism 400 to apply pressure to the expansion joint to test the compression resistance of the expansion joint. At the same time, the pressure sensor 410 can detect the magnitude of the applied pressure in real time. After the expansion joint is applied with the U-shaped pressing frame 411, since the expansion joint is used for bridge connection, it will be crushed by vehicles during use. Therefore, when performing the compression test on the expansion joint, it is necessary to consider the compression test when the vehicle is crushing the expansion joint, thereby improving the accuracy of the expansion joint compression test. In the present invention, a stable pressure is provided by the cooperation between the hydraulic cylinder 300 and the Chinese-shaped pressing frame 411, and this pressure can also be used as the pressure generated by simulating the weight of the vehicle itself. Subsequently, the driving motor 2 401 and the driving motor 3 416 respectively drive the screw rod 3 417 and the screw rod 2 404 to rotate, so that the screw rod seat 402 slides along the screw rod 3 417, and the L-shaped screw rod seat 413 slides along the screw rod 2 404. In this process, the screw rod seat 402 is used to drive the connecting plate 405 to move forward and backward along the fixed plate 414, so that the expansion joint is horizontally and linearly adjusted by the pressing wheel 1 407. The expansion joint is rolled in the horizontal straight direction to simulate the test of a vehicle rolling over the expansion joint in a straight line, thereby improving the accuracy of the expansion joint compression test. At the same time, the pressing wheel 407 rolls the expansion joint in the horizontal straight direction. Since the rotating disk 408 is rotatably connected to the U-shaped fixed seat 406, during the rolling process of the pressing wheel 407, the pressing roller 409 and the rotating disk 408 roll in the horizontal straight direction in a spiral manner, simulating the test of rolling over the expansion joint when the vehicle changes lanes multiple times, thereby further improving the accuracy of the expansion joint compression test. At the same time, during the movement of the connecting plate 405, the L-shaped screw seat 413 moves along the The screw rod 404 moves, and because the pressing wheel 412 and the L-shaped screw rod seat 413 are connected by a bearing, while the pressing wheel 407 rolls the expansion joint in the horizontal straight direction, the pressing wheel 412 rolls in the horizontal oblique direction between the two adjacent U-shaped pressing frames 411, simulating the test of the vehicle rolling the expansion joint during the lane change process, so as to better test the accuracy of the expansion joint compression resistance. In this process, by simulating the situation of the vehicle rolling the expansion joint under different conditions under stable pressure, the accuracy of the expansion joint compression resistance test is improved.

Claims

1. A highway bridge expansion joint compression test device, comprising a test bench (100), wherein: Two slide rails (110) are symmetrically fixed on the top of the test bench (100), and two limit mechanisms (200) are symmetrically slid on the slide rails (110), an L-shaped support seat (120) is fixed at the middle position of the back of the test bench (100), and a hydraulic cylinder (300) is installed at the middle position of the top of the L-shaped support seat (120), characterized in that the output end of the hydraulic cylinder (300) extends to the top of the test bench (100) and is fixed with a pressure test mechanism (400), and the pressure test mechanism (400) includes: A fixed plate (414) is fixedly connected to the output end of the hydraulic cylinder (300), and three groups of U-shaped pressing frames (411) are fixed at equal intervals on the bottom surface of the fixed plate (414), and a pressure sensor (410) is installed at the bottom of the U-shaped pressing frame (411) at the middle position; The connecting plate (405) is arranged between two adjacent U-shaped pressing frames (411) and reciprocates along the front and rear ends of the fixing plate (414), and a linear rolling pressing assembly is fixed at equal intervals along the length direction at the bottom of the connecting plate (405); The fixed frame (403) is fixedly connected to one end of the bottom of the connecting plate (405), and the fixed frame (403) passes through the middle group of Chinese-shaped pressing frames (411), and an oblique rolling pressing component is symmetrically arranged on the inner side of the fixed frame (403).

2. A highway bridge expansion joint compression test device according to claim 1, characterized in that: The limiting mechanism (200) includes a limiting seat (207), and a slide groove (206) that can slide along the slide rail (110) is symmetrically arranged at the bottom of the limiting seat (207), and a moving groove (203) is symmetrically opened on the top of the limiting seat (207), and the interior of the moving groove (203) is rotatably connected to a screw rod (204), and a limiting block (202) is slidably connected to the two screw rods (204), and a driving motor (201) for driving the screw rod (204) to rotate is installed at the end of the limiting seat (207), and an electric telescopic rod (205) for driving the limiting seat (207) to move is installed on the side of the limiting seat (207).

3. A highway bridge expansion joint compression test device according to claim 1, characterized in that: A screw rod three (417) and a slide rod (418) are respectively installed at the bottom of the fixing plate (414) between two adjacent U-shaped pressing frames (411), and a screw rod seat (402) and a slide rod (415) corresponding to each other are sleeved on the screw rod three (417) and the slide rod (418), and the screw rod seat (402) and the slide rod (415) are fixed to the corresponding connecting plate (405), and a driving motor two (401) for driving the screw rod three (417) to rotate is installed at the end position of the screw rod three (417).

4. A highway bridge expansion joint compression test device according to claim 1, characterized in that: The linear rolling pressing assembly comprises a U-shaped fixing seat (406) fixed to the bottom of the connecting plate (405) via a support rod, and a pressing wheel (407) is installed at both ends of the U-shaped fixing seat (406).

5. A highway bridge expansion joint compression test device according to claim 4, characterized in that: The groove of the U-shaped fixing seat (406) is connected to a rotating disk (408) via a bearing, and pressing rollers (409) are installed on the bottom surface of the rotating disk (408) at equal intervals along its circumferential direction.

6. A highway bridge expansion joint compression test device according to claim 1, characterized in that: The oblique rolling pressing assembly includes two sets of screw rods (404) installed on the inner side of a fixed frame (403), and a driving motor (416) for driving the two sets of screw rods (404) to rotate is installed at the end of the fixed frame (403), and an L-shaped screw rod seat (413) that matches the screw rod (404) is sleeved on each of the screw rods (404), and a pressing wheel (412) is installed at the bottom of the L-shaped screw rod seat (413) through a bearing.

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