Concrete dam crack evolution monitoring device

Abstract

The utility model relates to a concrete dam crack evolution monitoring device, which belongs to the technical field of crack monitoring equipment and comprises a monitoring component, the monitoring component comprises a mounting shell, a moving plate is slidably connected in the mounting shell, a rotating rod is rotatably connected onto the moving plate, and the rotating rod is inserted into the mounting shell. A gear is fixedly connected to the end, close to the moving plate, of the rotating rod, two moving blocks are slidably connected to the moving plate, racks meshed with the gear are fixedly connected to the opposite side walls of the two moving blocks, a reset spring is fixedly connected between the moving plate and the mounting shell, and two surface wave vibration exciters are fixedly connected to the side wall of the moving plate; according to the device, a worker can be helped to easily fix the surface wave vibration exciter and the surface wave receiver to a gap in the high position of a dam body through the supporting operation assembly, meanwhile, the surface wave receiver can be adjusted, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crack monitoring equipment, in particular to a concrete dam crack evolution monitoring device. Background Art

[0002] Cracks in concrete dams are primarily caused by a combination of factors, including temperature fluctuations, shrinkage, construction defects, material degradation, and external loads. When concrete cools after heating during the hardening process, or when it undergoes prolonged wet-dry cycles, the volume of the concrete changes. If this deformation exceeds its tensile strength, cracks will form. Additionally, poor design or construction errors can cause cracks. Over time, aging and corrosion can exacerbate the formation of cracks.

[0003] The specification of Chinese utility model patent 202320514856.5 discloses a concrete dam crack evolution monitoring device, including a surface wave signal generating system and a crack monitoring system. The surface wave signal generating system includes a surface wave exciter and a surface wave signal generator. The surface wave exciter is electrically connected to the surface wave signal generator. The surface wave exciter is used to be installed on the concrete dam to transmit surface waves to the concrete dam. The crack monitoring system includes a surface wave receiver and a digital oscilloscope. There are at least two surface wave receivers, each of which is electrically connected to the digital oscilloscope. The surface wave receiver is used to be installed on both sides of the crack in the concrete dam. By combining the surface wave signal generating system and the crack monitoring system, the length of the concrete crack is calculated, and the evolution process of the concrete dam crack can be monitored in real time to prevent the crack from further developing and ensure the safe operation of the dam.

[0004] In the actual use of the above-mentioned patent, the surface wave exciter and the surface wave receiver need to be fixed on the concrete dam. In order to avoid damage to the dam body caused by drilling, the surface wave exciter generally needs to be manually fixed by hand. However, there are two problems with the manual fixing method: first, it is difficult to fix cracks at higher positions manually; second, it is difficult to perform other operations while manually fixing it, thereby reducing work efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a concrete dam crack evolution monitoring device to solve the problems of the manual fixing method proposed in the above background technology, such as the difficulty in fixing cracks at higher positions and low working efficiency.

[0006] The technical solution of the utility model is:

[0007] The monitoring component includes a mounting shell, a movable plate is slidably connected to the inside of the mounting shell, a rotating rod is rotatably connected to the movable plate, and the rotating rod is inserted into the mounting shell, and a gear is fixedly connected to one end of the rotating rod close to the movable plate, and two movable blocks are slidably connected to the movable plate, and opposite side walls of the two movable blocks are fixedly connected to a rack meshing with the gear, a reset spring is fixedly connected between the movable plate and the mounting shell, two surface wave exciters are fixedly connected to the side wall of the movable plate, a surface wave receiver is fixedly connected to the movable block, a supporting operation component is fixedly connected to the mounting shell, and a spacing indication component is fixedly connected to the side wall of the movable block.

[0008] Furthermore, the supporting operation assembly includes a rotating sleeve rotatably connected to the rotating rod, a lever rotatably connected to the rotating sleeve, a connecting rod fixedly connected to the lower side wall of the mounting shell, two frames fixedly connected to the side wall of the connecting rod, one of the frames is rotatably connected to the lever, and the two frames are rotatably connected to the rotating rod, a square rod is inserted into the end of the rotating rod away from the mounting shell, a universal joint is fixedly connected between the square rod and the rotating rod, and a disc is fixedly connected to the end of the rotating rod away from the mounting shell.

[0009] By setting up the supporting operation components, it is possible to help workers control the extension and movement of the moving block through the rotating rod and the lever.

[0010] Furthermore, the spacing indicator assembly includes a scale bar fixedly connected to the two moving blocks, the scale bar is arranged through the side wall of the installation shell, and an arrow plate is carved on the rear side wall of the installation shell.

[0011] By setting up a spacing indication component, the arrow plate can move along with the moving block, and then the indication of the arrow plate can be used to tell the distance between the two arrow plates and determine the spacing between the two groups of surface wave receivers.

[0012] The present invention provides a concrete dam crack evolution monitoring device through improvement, which has the following improvements and advantages compared with the prior art:

[0013] Firstly, the utility model can help workers to easily fix the surface wave exciter and the surface wave receiver on the gap at the high part of the dam body through the supporting operating assembly, and can also adjust the surface wave receiver, thereby improving work efficiency.

[0014] Second, the utility model can help workers quickly understand the distance between the two groups of surface wave receivers on the left and right sides of the crack, thereby facilitating adjustments by the workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 It is a three-dimensional stereogram of the utility model;

[0017] Figure 2 It is a structural diagram of the monitoring component in the utility model;

[0018] Figure 3 It is a structural diagram of the support operating assembly in the present utility model;

[0019] Figure 4 yes Figure 3 An enlarged view of the middle support operating assembly;

[0020] Figure 5 It is a structural diagram of the distance indicating component in the utility model.

[0021] Description of reference numerals:

[0022] 1. Monitoring assembly; 101. Mounting housing; 102. Moving plate; 103. Rotating rod; 104. Gear; 105. Moving block; 106. Rack; 107. Return spring; 108. Surface wave exciter; 109. Surface wave receiver;

[0023] 2. Support operating assembly; 201. Rotating sleeve; 202. Lever; 203. Connecting rod; 204. Frame; 205. Rotating rod; 206. Square rod; 207. Universal joint; 208. Disc;

[0024] 3. Spacing indicator assembly; 301. Scale bar; 302. Arrow plate. DETAILED DESCRIPTION

[0025] The following will be combined with the Figures 1 to 5 This utility model is described in detail, and the technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the embodiments described are only some of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this utility model.

[0026] The utility model provides a concrete dam crack evolution monitoring device through improvement. Figure 1 - Figure 5As shown, it includes a monitoring component 1, which includes a mounting shell 101, a movable plate 102 is slidably connected inside the mounting shell 101, a rotating rod 103 is rotatably connected to the center of the movable plate 102 through a bearing, and the rotating rod 103 is plugged into and rotatably connected to the mounting shell 101, and a gear 104 is fixedly connected to one end of the rotating rod 103 close to the movable plate 102, and two movable blocks 105 are slidably connected to the movable plate 102, and the opposite side walls of the two movable blocks 105 are fixedly connected to a rack 106 that meshes with the gear 104, a reset spring 107 is fixedly connected between the movable plate 102 and the mounting shell 101, two surface wave exciters 108 are fixedly connected to the side wall of the movable plate 102, a surface wave receiver 109 is fixedly connected to the movable block 105, a supporting operation component 2 is fixedly connected to the mounting shell 101, and a spacing indication component 3 is fixedly connected to the side wall of the movable block 105.

[0027] Among them, the surface wave exciter 108 and the surface wave receiver 109 are both existing technologies, and their structural principles will not be described in detail. At the same time, the device also includes a power supply, a switch, a controller, a power supply cable and other devices, which are not the main technologies and will not be described in detail.

[0028] In this embodiment: when in use, first apply coupling agent to the probes of the surface wave exciter 108 and the surface wave receiver 109, and then by rotating the rod 103 to the position of the crack in the dam body, the mounting shell 101 is attached to the dam body, so that the surface wave exciter 108 is in contact with the dam body. At this time, the two groups of surface wave receivers 109 are also located on both sides of the crack and in contact with the dam body. Then the staff starts the surface wave exciter 108 to generate surface waves for the dam body, and cooperates with the surface wave receiver 109 to receive the surface waves, and cooperates with the oscilloscope and calculator to calculate the length of the crack. The oscilloscope and calculator are not shown in the figure. Their structure and principles are all existing technologies. During monitoring, the staff also needs to adjust the spacing between the two groups of surface wave receivers 109 and perform secondary calculations to improve the monitoring results.

[0029] In the above embodiment, in order to adjust the distance between the two groups of surface wave receivers 109 and perform secondary calculation to improve the monitoring results, the following methods can be used:

[0030] The supporting operation component 2 includes a rotating sleeve 201 rotatably connected to the rotating rod 103, a lever 202 is rotatably connected to the rotating sleeve 201, a connecting rod 203 is fixedly connected to the lower side wall of the mounting shell 101, two frames 204 are fixedly connected to the side wall of the connecting rod 203, one of the frames 204 is rotatably connected to the lever 202, and a rotating rod 205 is rotatably connected to the two frames 204, a square rod 206 is inserted into the end of the rotating rod 103 away from the mounting shell 101, a universal joint 207 is fixedly connected between the square rod 206 and the rotating rod 205, and a disc 208 is fixedly connected to the end of the rotating rod 205 away from the mounting shell 101.

[0031] In a preferred embodiment, when the positions of the two sets of surface wave receivers 109 need to be adjusted, the staff first presses the lever 202. The end of the lever 202 close to the monitoring component 1 passes through the fulcrum of the frame 204, and the rotating sleeve 201 pulls the rotating rod 103, so that the rotating rod 103 pulls the movable plate 102 to move inside the mounting shell 101. At this time, the two surface wave receivers 109 are no longer in contact with the dam body. At the same time, the staff rotates the disc 208, and the disc 208 drives the square rod through the rotating rod 205 and the universal joint 207. 206 rotates, the square rod 206 drives the rotating rod 103 to rotate, and the rotating rod 103 drives the gear 104 to rotate, so that when the gear 104 rotates, it drives the two moving blocks 105 to move, and finally realizes the movement of the distance between the two groups of surface wave receivers 109. At the same time, it can also ensure that the crack is between the two surface wave receivers 109. After determining the distance between the surface wave receivers 109, the staff releases the lever 202. At this time, the moving plate 102, under the thrust of the reset spring 107, makes the surface wave receiver 109 contact with the dam body again.

[0032] refer to Figure 4 and Figure 5 In a preferred embodiment, the spacing indicating assembly 3 includes a scale bar 301 fixedly connected to the two moving blocks 105, the scale bar 301 is set through the side wall of the mounting shell 101, and the rear side wall of the mounting shell 101 is engraved with an arrow plate 302.

[0033] In this embodiment, when the moving block 105 moves, the moving block 105 can drive the arrow plate 302 to move, and the pointer of the arrow plate 302 points to the scale bar 301, so that the staff can quickly know the distance between the two groups of surface wave receivers 109.

[0034] Working Principle: During use, the operator places the mounting shell 101 against the dam body, bringing the surface wave exciter 108 into contact with the dam body. At this point, the two sets of surface wave receivers 109 are also located on either side of the crack and in contact with the dam body. The operator then activates the surface wave exciter 108 to generate surface waves on the dam body, and uses the surface wave receivers 109 to receive the surface waves. Using an oscilloscope and a calculator, the operator calculates the length of the crack.

[0035] When the positions of the two sets of surface wave receivers 109 need to be adjusted, the staff first presses the lever 202. The end of the lever 202 close to the monitoring component 1 passes through the fulcrum of the frame 204, and pulls the rotating rod 103 through the rotating sleeve 201, so that the rotating rod 103 pulls the movable plate 102 to move inside the installation shell 101. At this time, the two surface wave receivers 109 are no longer in contact with the dam body. At the same time, the staff rotates the disc 208. The disc 208 drives the square rod 206 to rotate through the rotating rod 205 and the universal joint 207. The square rod 206 drives the rotating rod 103 to rotate, and the rotating rod 103 drives the gear 104 to rotate. When the gear 104 rotates, The two moving blocks 105 are driven to move. When the moving block 105 moves, the moving block 105 can drive the arrow plate 302 to move, and finally realize the movement of the distance between the two groups of surface wave receivers 109. At the same time, it can also ensure that the crack is between the two surface wave receivers 109. When the moving block 105 moves, the pointer of the arrow plate 302 points to the scale bar 301, which makes it easy for the staff to quickly know the distance between the two groups of surface wave receivers 109. After determining the distance between the surface wave receivers 109, the staff releases the lever 202. At this time, the moving plate 102, under the thrust of the reset spring 107, makes the surface wave receiver 109 contact with the dam body again.

[0036] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A concrete dam crack evolution monitoring device, comprising a monitoring component (1), characterized in that: The monitoring assembly (1) comprises a mounting shell (101), a movable plate (102) is slidably connected inside the mounting shell (101), a rotating rod (103) is rotatably connected to the movable plate (102), and the rotating rod (103) is plugged into the mounting shell (101), and a gear (104) is fixedly connected to one end of the rotating rod (103) close to the movable plate (102), and two movable blocks (105) are slidably connected to the movable plate (102), and the two movable blocks (105) are both on opposite side walls. A rack (106) meshing with the gear (104) is fixedly connected, a return spring (107) is fixedly connected between the movable plate (102) and the mounting shell (101), two surface wave exciters (108) are fixedly connected to the side wall of the movable plate (102), a surface wave receiver (109) is fixedly connected to the movable block (105), a supporting operating assembly (2) is fixedly connected to the mounting shell (101), and a spacing indicating assembly (3) is fixedly connected to the side wall of the movable block (105).

2. A concrete dam crack evolution monitoring device according to claim 1, characterized in that: The supporting operation assembly (2) comprises a rotating sleeve (201) rotatably connected to the rotating rod (103), and a lever (202) is rotatably connected to the rotating sleeve (201).

3. A concrete dam crack evolution monitoring device according to claim 2, characterized in that: A connecting rod (203) is fixedly connected to the lower side wall of the installation shell (101), and two frames (204) are fixedly connected to the side wall of the connecting rod (203).

4. A concrete dam crack evolution monitoring device according to claim 3, characterized in that: One of the frames (204) is rotatably connected to the lever (202).

5. The concrete dam crack evolution monitoring device according to claim 4, characterized in that: A rotating rod (205) is rotatably connected to the two frames (204), and a square rod (206) is inserted into one end of the rotating rod (103) away from the mounting shell (101).

6. The concrete dam crack evolution monitoring device according to claim 5, characterized in that: A universal joint (207) is fixedly connected between the square rod (206) and the rotating rod (205), and a disc (208) is fixedly connected to one end of the rotating rod (205) away from the mounting shell (101).

7. The concrete dam crack evolution monitoring device according to claim 6, characterized in that: The spacing indicating assembly (3) comprises a scale bar (301) fixedly connected to two moving blocks (105), the scale bar (301) being arranged through the side wall of the mounting shell (101), and an arrow plate (302) being carved on the rear side wall of the mounting shell (101).

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