Device for monitoring displacement of bridge expansion joint along bridge direction

Abstract

The utility model relates to a bridge expansion joint displacement monitoring device along the bridge direction, which comprises a support frame, the support frame is provided with an elastic support member used for being installed in an expansion joint, and two elastic surfaces of the elastic support member respectively abut against two side walls of the expansion joint; the supporting frame is further provided with a fixing shell and a pointer, the pointer is movably installed on the outer wall of the shell, and a linkage assembly is connected between the pointer and the elastic supporting piece. The linkage assembly can move when the distance between the two elastic faces of the elastic supporting piece is increased or decreased, so that the position of the pointer on the shell is driven to change through the displacement of the linkage assembly, and a worker can visually observe the change of the bridge expansion joint structure by observing the movement change of the pointer.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge detection, in particular to a device for monitoring the displacement of a bridge expansion joint in the direction of the bridge. Background Art

[0002] A bridge expansion joint refers to the gap between two adjacent beams and slabs. Bridge expansion joints are mostly set at the weak structural parts of the beam ends, directly bearing the vehicle loads and exposed to the natural environment. They are affected by a variety of complex factors and are prone to displacement changes of varying degrees. Bridge expansion joints are an important part of bridge design.

[0003] At present, in the process of monitoring the displacement of bridge expansion joints, most of the time, the displacement of the expansion joints is monitored by naked eye. The expansion joints are observed with the naked eye, which is not accurate enough and cannot monitor the displacement of the expansion joints at all times. It can only observe the larger displacement changes of the bridge expansion joints at regular intervals. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a device for monitoring the displacement of bridge expansion joints along the bridge direction, so as to solve the problem that the existing bridge expansion joints cannot be accurately observed by the naked eye of the staff and the degree of deformation is difficult to observe.

[0005] The utility model is achieved through the following technical solutions:

[0006] A device for monitoring the displacement of a bridge expansion joint in the direction of the bridge comprises a support frame, wherein the support frame is provided with an elastic support member for being installed in the expansion joint, and two elastic surfaces of the elastic support member respectively abut against two side walls of the expansion joint;

[0007] The support frame is further provided with a fixed shell and a pointer. The pointer is movably mounted on the outer wall of the shell. A linkage assembly is connected between the pointer and the elastic support member.

[0008] It is further defined that the elastic support member includes two displacement plates and a support portion located between the two displacement plates, and the two displacement plates are both slidably matched with the support portion and can move in a direction of relatively approaching or moving away from each other.

[0009] It is further defined that the support portion includes a shell, a spring and two connecting rods, the spring is located in the shell and between the two connecting rods, and one end of the two connecting rods away from the spring passes through the shell and is respectively connected to the two displacement plates.

[0010] It is further defined that a slide groove extending along the length direction of the connecting rod is opened on one side of the shell, and a pressing plate is slidably fitted in the slide groove, one end of the pressing plate is connected to the connecting rod, and the other end extends out of the slide groove.

[0011] It is further defined that the linkage assembly includes a gear and a rack, the gear is rotatably installed in the housing and is coaxially connected to the pointer, the rack is engaged with the bottom surface of the gear, the rack is slidably fitted with the support frame, and one end is transmission-connected to two displacement plates.

[0012] It is further defined that the linkage assembly also includes two hinged rods, one end of each of the hinged rods is hinged to one end of the rack, and the other end is hinged to the two displacement plates respectively.

[0013] It is further defined that dovetail grooves are provided on two opposite sides of the support frame, a slider is slidably fitted in the dovetail groove, and the slider is connected to the side of the rack.

[0014] It is further defined that a plurality of indicating blocks are provided on a side of the shell facing the pointer, and the plurality of indicating blocks are arranged along a rotation track of the pointer.

[0015] It is further defined that the two indicating blocks on both sides are provided with alarm units on one side facing the pointer, and the alarm units are located on the rotation track of the pointer.

[0016] It is further defined that the alarm unit includes a pressure sensor and a buzzer, the pressure sensor and the buzzer are electrically connected, and the pressure sensor is located on the rotation track of the upper end of the pointer.

[0017] The beneficial effects of the present invention are:

[0018] The linkage component can move when the distance between the two elastic surfaces of the elastic support increases or decreases, so that the position of the pointer on the shell changes through the displacement of the linkage component, so that the staff can intuitively observe the changes in the bridge expansion joint structure by observing the changes in the pointer movement.

[0019] Other advantages, objectives, and features of the present invention will be described in detail in the following description and, to some extent, will be apparent to those skilled in the art upon examination and study of the following or may be learned from practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the housing of the present utility model;

[0022] Figure 3 This is a schematic diagram of the connection between the rack and the support frame of the utility model;

[0023] Figure 4This is a schematic diagram of the internal structure of the fixed shell of the present utility model.

[0024] In the picture:

[0025] 1. Support frame; 2. Fixed shell; 201. Pointer; 3. Displacement plate; 4. Housing; 401. Spring; 402. Connecting rod; 4021. Pressing plate; 5. Gear; 501. Rack; 502. Articulated rod; 6. Dovetail groove; 601. Slider; 7. Indication block; 8. Alarm unit. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0029] In the above description of the present invention, it should be noted that the terms "one side" and "the other side" and the like indicate positions or locations based on the positions or locations shown in the accompanying drawings, or the positions or locations in which the product of the present invention is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0030] Furthermore, the term "identical" and similar terms do not necessarily require that the components be absolutely identical; slight variations are permitted. The term "perpendicular" simply refers to the positional relationship between components being more perpendicular than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted.

[0031] See also Figure 1-4The utility model provides a technical solution: a device for monitoring the displacement of a bridge expansion joint in the direction of the bridge, comprising a support frame 1, wherein the support frame 1 is provided with an elastic support member for being installed in the expansion joint, and the two elastic surfaces of the elastic support member are respectively against the two side walls of the expansion joint;

[0032] The support frame 1 is further provided with a fixed shell 2 and a pointer 201 . The pointer 201 is movably mounted on the outer wall of the housing 4 . A linkage assembly is connected between the pointer 201 and the elastic support member.

[0033] In this solution, the linkage assembly can be displaced when the distance between the two elastic surfaces of the elastic support member increases or decreases, so that the position of the pointer 201 on the housing 4 changes through the displacement of the linkage assembly, so that the staff can intuitively observe the changes in the bridge expansion joint structure by observing the movement changes of the pointer 201;

[0034] During use, the elastic support is temporarily compressed to store elastic energy. The elastic support is then placed into the expansion joint and the compression is released, causing its two elastic surfaces to contact the two side walls of the expansion joint. When the bridge expansion joint structure changes, the elastic support expands or is compressed by the expansion joint, driving the linkage assembly toward or away from the support frame 1, thereby moving the pointer 201 on the housing 4. Workers can visually observe whether the expansion joint has shifted by observing the original and post-movement positions of the pointer 201.

[0035] To achieve better results, the operator may draw scale lines on the housing 4 to facilitate observing the amplitude of the movement of the pointer 201 to determine the degree of change of the expansion joint.

[0036] In this embodiment, the elastic support member includes two displacement plates 3 and a support portion located between the two displacement plates 3. The two displacement plates 3 are slidably matched with the support portion and can move in a direction of relatively approaching or moving away from each other.

[0037] During specific use, the two displacement plates 3 are elastically connected to the side walls of the expansion joint through the support part. When the structure of the bridge expansion joint changes, the displacement plates 3 and the side walls of the expansion joint are displaced synchronously, and can move in the direction close to or away from the support part respectively.

[0038] In this embodiment, the support portion includes a shell 4, a spring 401 and two connecting rods 402. The spring 401 is located in the shell 4 and between the two connecting rods 402. The ends of the two connecting rods 402 away from the spring 401 pass through the shell 4 and are respectively connected to the two displacement plates 3.

[0039] When the spring 401 is naturally stretched, it always maintains a tendency to push the two connecting rods 402 in a relatively distant direction;

[0040] In specific use, when the bridge expansion joint structure changes, the two displacement plates 3 will present the following states under the action of the elastic force of the spring 401:

[0041] State 1: When the side walls on both sides of the expansion joint are relatively close, the distance between the side walls on both sides of the expansion joint is reduced, which causes the expansion joint to further squeeze the two displacement plates 3, causing the two displacement plates 3 to move relatively close;

[0042] State 2: When the side walls on both sides of the expansion joint are relatively far apart, the spacing between the side walls on both sides of the expansion joint increases, and the two displacement plates 3 are pushed relatively far apart by the elastic force of the spring 401 to increase the spacing between the two displacement plates 3, so as to cause the two displacement plates 3 to fit on the side walls of the expansion joint. At the same time, under the pushing action of the spring 401, friction is generated between the two displacement plates 3 and the side walls on both sides of the expansion joint, thereby causing the two displacement plates 3 to fit better with the side walls on both sides of the expansion joint.

[0043] In this embodiment, the linkage assembly includes a gear 5 and a rack 501. The gear 5 is rotatably installed in the housing 4 and is coaxially connected to the pointer 201. The rack 501 is engaged with the bottom surface of the gear 5. The rack 501 is slidably matched with the support frame 1, and one end is transmission-connected to the two displacement plates 3.

[0044] In this embodiment, the linkage assembly further includes two hinged rods 502 , one end of each of the hinged rods 502 is hinged to one end of the rack 501 , and the other end of each of the hinged rods 502 is hinged to the two displacement plates 3 .

[0045] Since the ends of the two hinged rods 502 are hinged to the two displacement plates 3 respectively, the change in the distance between the two hinged rods 502 is synchronized with the change in the distance between the two displacement plates 3 .

[0046] The two displacement plates 3 can be relatively far away or close to each other to present the following states:

[0047] In state 1, when the two displacement plates 3 are relatively close to each other, the two hinged rods 502 are also synchronously close to each other. Since the length of the hinged rods 502 is constant, when one end of the two hinged rods 502 is relatively close to each other, the other end will move away from the end, causing the rack 501 to move in a direction away from the hinged rods 502. Since the rack 501 is engaged with the bottom surface of the gear 5, the gear 5 rotates counterclockwise, thereby driving the pointer 201 to rotate synchronously in the same direction.

[0048] In state two, when the two displacement plates 3 move away from each other, the two hinged rods 502 also move away from each other synchronously. Since the length of the hinged rod 502 is constant, when one end of the two hinged rods 502 moves away from each other, the other end will move closer to the end, causing the rack 501 to move toward the direction close to the hinged rod 502. Since the rack 501 is engaged with the bottom surface of the gear 5, the gear 5 rotates clockwise, thereby driving the pointer 201 to rotate synchronously in the same direction.

[0049] During specific use, the two displacement plates 3 drive the two hinged rods 502 to move synchronously, and at the same time, a thrust or pull is applied to the rack 501, causing the rack 501 to move and drive the gear 5 to rotate, thereby driving the pointer 201 to rotate, so that the observer can observe whether the pointer 201 rotates and the rotation amplitude to know the degree of deformation of the expansion joint.

[0050] In this embodiment, dovetail grooves 6 are formed on two opposite sides of the support frame 1 , and sliders 601 are slidably fitted in the dovetail grooves 6 . The sliders 601 are connected to the side surfaces of the rack 501 .

[0051] Among them, the dovetail groove 6 does not pass through the support frame 1. Since the rack 501 slides with the dovetail groove 6 through the slider 601, the rack 501 and the slider 601 will not be separated from the dovetail groove 6 and the support frame 1, causing the rack 501 to fall off.

[0052] During specific use, when the rack 501 slides in the support frame 1 , the slider 601 on the side wall engages with the dovetail groove 6 , so that the rack 501 can stably slide along the length direction of the dovetail groove 6 .

[0053] In this embodiment, a plurality of indicating blocks 7 are provided on a side of the housing 4 facing the pointer 201 , and the plurality of indicating blocks 7 are arranged along the rotation trajectory of the pointer 201 .

[0054] The staff can attach different color cards to different indicator blocks 7 to indicate the degree of deformation of the expansion joint through different colors.

[0055] During specific use, when the pointer 201 rotates with the gear 5, the tip of the pointer 201 will point to one of the indicator blocks 7 as it rotates. The staff can know the deformation degree of the expansion joint by observing the indicator block 7 pointed by the tip of the pointer 201.

[0056] In this embodiment, the two indicating blocks 7 on both sides are provided with alarm units 8 on their sides facing the pointer 201 . The alarm units 8 are located on the rotation track of the pointer 201 .

[0057] Before placing the displacement plate 3 into the expansion joint, the staff adjusts the pointer 201 to point to the indicator block 7 in the middle, so that the two indicator blocks 7 on both sides indicate that the expansion joint has a larger degree of change.

[0058] In this embodiment, the alarm unit 8 includes a pressure sensor and a buzzer, the pressure sensor and the buzzer are electrically connected, and the pressure sensor is located on the rotation track of the upper end of the pointer 201.

[0059] During specific use, when the tip of the pointer 201 rotates toward the indicator block 7 located at the outermost edge, when it rotates to contact the pressure sensor, the pressure sensor is compressed and triggers the buzzer, causing the buzzer to sound to alert surrounding personnel that the deformation of the expansion joint is large and they need to pay attention to the changes.

[0060] Among them, the buzzer can use model: SH1240T2PJ; pressure sensor: NSPAS3.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A device for monitoring the displacement of a bridge expansion joint along the bridge direction, comprising a support frame (1), characterized in that: The support frame (1) is provided with an elastic support member for being installed in the expansion joint, and two elastic surfaces of the elastic support member respectively abut against two side walls of the expansion joint; The support frame (1) is further provided with a fixed shell (2) and a pointer (201). The pointer (201) is movably mounted on the outer wall of the housing (4). A linkage assembly is connected between the pointer (201) and the elastic support member.

2. The device for monitoring the displacement of a bridge expansion joint along the bridge direction according to claim 1 is characterized in that: The elastic support member comprises two displacement plates (3) and a support portion located between the two displacement plates (3); the two displacement plates (3) are slidably matched with the support portion and can move in a direction of relative proximity or distance.

3. The device for monitoring the displacement of a bridge expansion joint along the bridge direction according to claim 2 is characterized in that: The support portion comprises a housing (4), a spring (401), and two connecting rods (402); the spring (401) is located inside the housing (4) and between the two connecting rods (402); one end of the two connecting rods (402) away from the spring (401) passes through the housing (4) and is respectively connected to the two displacement plates (3).

4. The device for monitoring displacement of a bridge expansion joint along the bridge direction according to claim 3 is characterized in that: A sliding groove extending along the length direction of the connecting rod (402) is provided on one side of the housing (4), and a pressing plate (4021) is slidably fitted in the sliding groove. One end of the pressing plate (4021) is connected to the connecting rod (402), and the other end extends out of the sliding groove.

5. The device for monitoring displacement of a bridge expansion joint along the bridge direction according to claim 1 is characterized in that: The linkage assembly comprises a gear (5) and a rack (501); the gear (5) is rotatably mounted in the housing (4) and coaxially connected to the pointer (201); the rack (501) is meshed with the bottom surface of the gear (5); the rack (501) is slidably fitted with the support frame (1), and one end of the rack is transmission-connected to the two displacement plates (3).

6. The device for monitoring displacement of a bridge expansion joint along the bridge direction according to claim 5 is characterized in that: The linkage assembly further comprises two hinged rods (502), one end of each of the hinged rods (502) being hinged to one end of the rack (501), and the other end being hinged to the two displacement plates (3) respectively.

7. The device for monitoring displacement of a bridge expansion joint along the bridge direction according to claim 5 is characterized in that: Dovetail grooves (6) are provided on opposite sides of the support frame (1), and a slider (601) is slidably fitted in the dovetail groove (6), and the slider (601) is connected to the side of the rack (501).

8. The device for monitoring displacement of a bridge expansion joint along the bridge direction according to claim 1 is characterized in that: A plurality of indicating blocks (7) are provided on a side of the housing (4) facing the pointer (201), and the plurality of indicating blocks (7) are arranged along the rotation track of the pointer (201).

9. The device for monitoring displacement of a bridge expansion joint along the bridge direction according to claim 8, characterized in that: The two indicating blocks (7) located on both sides are provided with alarm units (8) on the sides facing the pointer (201), and the alarm units (8) are located on the rotation track of the pointer (201).

10. The device for monitoring displacement of a bridge expansion joint along the bridge direction according to claim 9, characterized in that: The alarm unit (8) comprises a pressure sensor and a buzzer, the pressure sensor and the buzzer are electrically connected, and the pressure sensor is located on the rotation track of the upper end of the pointer (201).

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