Concrete thickness nondestructive testing device

Abstract

The invention relates to a nondestructive testing device for the thickness of concrete. The nondestructive testing device for the thickness of the concrete comprises a detector main body, a lifting jacking mechanism, a mounting mechanism, an angle adjusting mechanism and a third traction mechanism, the mounting mechanism is mounted at the top of the lifting and shoring mechanism through the angle adjusting mechanism, and the angle between the mounting mechanism and the lifting and shoring mechanism is adjusted through the angle adjusting mechanism; the third traction mechanism is installed at the lower end of the lifting jacking mechanism, and the rotation angle of the angle adjusting mechanism is controlled through the third traction mechanism. According to the scheme provided by the invention, the angle adjusting mechanism is arranged between the mounting mechanism and the lifting jacking mechanism, and the levelness of the mounting mechanism is adjusted under the mutual cooperation of the angle adjusting mechanism and the third traction mechanism, so that the working angle of the detector main body is adjusted; the detector main body can better adapt to detection work of concrete with different gradients, and the concrete thickness detection efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of thickness detection, and in particular to a nondestructive detection device for concrete thickness. Background Art

[0002] Concrete thickness testing is an important means of testing whether a concrete building is qualified. By measuring the thickness of concrete in different areas, a rough statistical analysis can be made on whether the construction floor is qualified. Especially for concrete floor slabs, the thickness of the concrete floor slab determines the structural strength of the floor slab, and is also one of the important criteria for ensuring the safety of the building.

[0003] At present, there are roughly two types of common concrete thickness non-destructive testing instruments on the market. One is a double-sided detection handheld tester, which includes a receiving probe and a transmitting probe respectively installed on the upper and lower surfaces of the building floor. During the detection, the installation positions of the receiving probe and the transmitting probe need to be aligned up and down. The handheld tester is wirelessly connected to the receiving probe, and its use is relatively restricted.

[0004] The other is a single-sided detector, which detects the thickness of concrete by attaching the detector to the concrete layer. However, in the actual use of the single-sided detector, there are still some shortcomings. When working, the single-sided detector cannot detect the thickness of concrete with special structures well, such as the thickness detection of concrete structures with certain angles, curved surfaces or special shapes. When multiple positions need to be detected, the position of the detector needs to be constantly adjusted, and the detector needs to be held or lifted high to move. The operation is more troublesome, time-consuming and labor-intensive, greatly increasing the degree of labor, and the overall adaptability is poor. Summary of the invention

[0005] In order to solve or partially solve the problems existing in the related art, the present application provides a concrete thickness non-destructive testing device, which aims to solve the problem that the current concrete thickness tester cannot perform thickness testing on concrete with special structures well.

[0006] The present application provides a nondestructive testing device for concrete thickness, comprising:

[0007] Detector body, lifting and supporting mechanism, installation mechanism, angle adjustment mechanism, and third traction mechanism;

[0008] The mounting mechanism is mounted on the top of the lifting and supporting mechanism through an angle adjustment mechanism. The angle adjustment mechanism includes a rotating block and a fixed block. The rotating block is mounted on the side of the fixed block. The mounting mechanism is mounted on the rotating block. The angle between the mounting mechanism and the lifting and supporting mechanism is adjusted through the angle adjustment mechanism.

[0009] The third traction mechanism is installed at the lower end of the lifting and supporting mechanism, and the third traction mechanism includes a winding roller, a third traction rope, a worm gear, a worm, and a second support rod;

[0010] The winding roller and the worm gear are rotatably installed on the second support rod, and the third traction rope slides through the winding roller. A worm is meshingly installed on one side of the worm gear. The winding roller is driven to rotate by rotating the worm gear installed on the second support rod to reel in the third traction rope. The third traction rope passes through the lifting and supporting mechanism, the angle adjustment mechanism and the bottom of the installation mechanism in sequence, and the rotation angle of the angle adjustment mechanism is controlled by retracting and releasing the third traction rope.

[0011] Optionally, in some embodiments, the angle adjustment mechanism includes:

[0012] Rotating block, angle scale, fixed block, right angle slot, T-block, connecting spring and arc slide;

[0013] The fixing block is installed at the top end of the first hollow telescopic rod, and two T-shaped blocks are symmetrically installed on the outer wall of the fixing block;

[0014] An arc-shaped slideway is provided inside the rotating block for the T-shaped block to slide, a connecting spring is provided inside the arc-shaped slideway, a connecting spring is installed inside the arc-shaped slideway, and an angle measuring scale is provided on the outer wall of the rotating block;

[0015] The fixed block is rotatably mounted in the arc-shaped slideway of the rotating block through the T-shaped block, and the two ends of the connecting spring are respectively fixed to the T-shaped block and the end of the arc-shaped slideway, and the rotating block is controlled to reset through the connecting spring;

[0016] A right-angle groove is provided inside the fixed block, so that the first traction mechanism passes through the right-angle groove to connect with the mounting mechanism, and the mounting mechanism is controlled to rotate with the rotating block.

[0017] Optionally, in some embodiments, the third traction mechanism includes:

[0018] A winding roller, a third traction rope, a second winding component, a worm gear, a worm, a bottom block and a second support rod;

[0019] The second support rod is installed on the outer wall of the lower end of the lifting and supporting mechanism, and a second winding component for winding the third traction rope is arranged between the second support rods;

[0020] The winding roller is rotatably installed between the second supporting rods, the third traction rope slides through the winding roller, a worm wheel coaxially arranged with the winding roller is installed on the outside of the second supporting rod, a worm is meshedly installed on one side of the worm wheel, and the worm is rotatably installed on the bottom block of the outer wall of the second supporting rod;

[0021] The third traction rope passes through the lifting and supporting mechanism, the interior of the angle adjustment mechanism in sequence and is connected with the bottom of the installation mechanism.

[0022] Optionally, in some embodiments, the second winding component includes:

[0023] Take-up drum, perforation, coil spring, shaft and limit plate;

[0024] The winding drum is installed between the two second support rods, and a through hole is provided on the outer wall of the winding drum for the third traction rope to pass through;

[0025] An axle rod for winding up the third traction rope is rotatably installed inside the winding drum, two limit plates are arranged on both sides of the axle rod, and a coil spring is installed between the axle rod and the inner wall of the winding drum.

[0026] Optionally, in some embodiments, the mounting mechanism includes:

[0027] Moving wheels, placing frame, outer cylinder, supporting spring and inner rod;

[0028] A moving wheel is respectively arranged at the four corners of the top of the placement frame;

[0029] Four outer cylinders distributed in a rectangular shape are arranged at the bottom of the inner cavity of the placement frame. An inner rod is slidably sleeved on each outer cylinder. A supporting spring is sleeved on the inner rod. The top end of the inner rod is fixedly connected to the bottom of the detector body.

[0030] Optionally, in some embodiments, the lifting and supporting mechanism comprises:

[0031] A first hollow telescopic rod, an overlapped end, a plug hole, a second hollow telescopic rod, a third hollow telescopic rod, a return spring and an insert block;

[0032] The second hollow telescopic rod is slidably sleeved in the third hollow telescopic rod, the first hollow telescopic rod is slidably sleeved in the second hollow telescopic rod, and the outer walls of the first hollow telescopic rod and the second hollow telescopic rod are equidistantly provided with insertion holes;

[0033] The upper ends of the second hollow telescopic rod and the third hollow telescopic rod are equipped with overlapping ends, the inner sides of the overlapping ends are provided with insertion cavities, the insides of the insertion cavities are slidably sleeved with insertion blocks matched with the insertion holes, and a reset spring is installed between the insertion blocks and the insertion cavities.

[0034] Optionally, in some embodiments, the device for nondestructive testing of concrete thickness further includes:

[0035] a first traction mechanism, a clamping and dragging mechanism, and a second traction mechanism;

[0036] The second traction mechanism and the third traction mechanism are installed at the lower end of the lifting and supporting mechanism;

[0037] The clamping and dragging mechanism is installed in the lifting and supporting mechanism, and the clamping and dragging mechanism is respectively connected to the first traction mechanism and the second traction mechanism;

[0038] The first traction mechanism passes through the lifting and supporting mechanism, the clamping and dragging mechanism and the angle adjustment mechanism to connect the detector body installed on the mounting mechanism. The second traction mechanism controls the traction rope of the first traction mechanism by pulling the clamping and dragging mechanism to achieve the upper and lower relative position control of the detector body in the mounting mechanism.

[0039] Optionally, in some embodiments, the first traction mechanism includes:

[0040] A first traction rope, a first support rod and a first winding component;

[0041] The first support rod is installed on the outer wall of the lower end of the lifting and supporting mechanism, and a first winding component for winding the first traction rope is installed between the first support rods. The first traction rope passes through the lifting and supporting mechanism, the clamping and dragging mechanism, and the angle adjustment mechanism in sequence and extends to the interior of the installation mechanism and is connected to the bottom of the detector body.

[0042] Optionally, in some embodiments, the second traction mechanism includes:

[0043] A handle, a positioning spring, a pressing rod and a second traction rope;

[0044] The handle is installed on the lifting and supporting mechanism below the first traction mechanism;

[0045] The pressing rod is rotatably mounted on the inner wall of the handle, a positioning spring is connected between the pressing rod and the top of the handle, a second traction rope is installed on the lower side of the pressing rod, the second traction rope slides through the top of the handle and is connected to the clamping and dragging mechanism.

[0046] Optionally, in some embodiments, the clamping and dragging mechanism comprises:

[0047] Traction block, clamping plate, wedge seat, V-clamp, movable cavity, top plate, guide rod, suspension spring and guide groove;

[0048] The wedge-shaped seat and the movable cavity are installed in the lifting and supporting mechanism. Two guide grooves are arranged on the upper side of the movable cavity. The sliding sleeve inside the guide groove is provided with a guide rod. The top end of the guide rod is connected to the top of the guide groove through a suspension spring. The bottom ends of the two guide rods are installed on the top plate.

[0049] Two relatively slidable clamping plates are symmetrically arranged at the lower end of the top plate, a second crossbar is installed on the inner slide groove of the top plate, the second crossbar runs through the inside of the two clamping plates, and a second spring is sleeved on the second crossbar between the two clamping plates;

[0050] A V-shaped clamp for clamping the first traction rope is arranged between the inner walls of the two clamps, and the bottoms of the two clamps can be slidably mounted on the traction block;

[0051] A first cross bar is installed on the inner slide groove of the traction block, the first cross bar runs through the inside of the two clamping plates, and a first spring is sleeved on the first cross bar between the two clamping plates;

[0052] The traction block is slidably sleeved between the two wedge-shaped seats, and the second traction rope of the second traction mechanism extends between the two wedge-shaped seats and is connected to the bottom end of the traction block.

[0053] The technical solution provided by this application may have the following beneficial effects:

[0054] By arranging an angle adjustment mechanism between the installation mechanism and the lifting support mechanism, the horizontality of the installation mechanism is adjusted under the cooperation of the angle adjustment mechanism and the third traction mechanism, thereby adjusting the working angle of the detector body, so that the detector body can better adapt to the detection of concrete with different slopes, thereby improving the efficiency of concrete thickness detection;

[0055] In addition, the present application movably installs the detector body through the installation mechanism. With the cooperation of the second traction mechanism, the clamping and dragging mechanism and the first traction mechanism, the installation height of the detector body can be adjusted in the placement frame of the installation mechanism. When moving, the detector body is retracted into the inner side of the installation mechanism so that the detector body will not be damaged by friction with the concrete surface. After arriving at the location to be tested, it is extended from the inner side of the placement frame again to fit the concrete surface for testing, so that the detector body can adapt well to the concrete thickness detection work in various situations and improve the concrete thickness detection speed at different positions.

[0056] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0058] Figure 1 It is a structural schematic diagram of a nondestructive testing device for concrete thickness shown in an embodiment of the present application;

[0059] Figure 2 The nondestructive testing device for concrete thickness shown in the embodiment of the present application is Figure 1 The enlarged structural diagram at A in the middle;

[0060] Figure 3 A schematic diagram of the third traction rope structure of the concrete thickness nondestructive testing device shown in the embodiment of the present application;

[0061] Figure 4It is a schematic diagram of the assembly structure of the installation mechanism and the angle adjustment mechanism of the concrete thickness nondestructive testing device shown in the embodiment of the present application;

[0062] Figure 5 It is a schematic diagram of the structure of the installation mechanism of the nondestructive testing device for concrete thickness shown in the embodiment of the present application;

[0063] Figure 6 It is a schematic diagram of the angle adjustment mechanism structure of the concrete thickness nondestructive testing device shown in an embodiment of the present application;

[0064] Figure 7 It is a partial cross-sectional structural schematic diagram of a second hollow telescopic rod and a first hollow telescopic rod of a nondestructive testing device for concrete thickness shown in an embodiment of the present application;

[0065] Figure 8 It is a schematic diagram of the structure of the clamping and dragging mechanism of the concrete thickness nondestructive testing device shown in the embodiment of the present application;

[0066] Fig. 9 It is a schematic diagram of the internal assembly structure of the top plate and the traction block of the concrete thickness nondestructive testing device shown in the embodiment of the present application;

[0067] Fig.10 It is a schematic diagram of a partial cross-sectional structure of a third hollow telescopic rod of the concrete thickness nondestructive testing device shown in an embodiment of the present application.

[0068] Figure numerals: 1-lifting and supporting mechanism; 11-first hollow telescopic rod; 12-lap end; 13-insertion hole; 14-second hollow telescopic rod; 15-third hollow telescopic rod; 16-reset spring; 17-insertion block; 2-detector body; 3-installation mechanism; 31-moving wheel; 32-placing frame; 33-outer cylinder; 34-support spring; 35-inner rod; 4-angle adjustment mechanism; 41-rotating block; 42-angle scale; 43-fixed block; 44-right angle groove; 45-T-block; 46-connecting spring; 47-arc slide; 5-first traction mechanism; 51-first traction rope; 52-first support rod; 53-first winding component; 6-clamping and dragging mechanism; 61 -traction block; 611-first crossbar; 612-first spring; 62-clamp; 63-wedge seat; 64-V-clamp; 65-movable chamber; 66-top plate; 661-second crossbar; 662-second spring; 67-guide rod; 68-suspension spring; 69-guide groove; 7-handle; 8-second traction mechanism; 81-positioning spring; 82-pressing rod; 83-second traction rope; 9-third traction mechanism; 91-winding roller; 92-third traction rope; 93-second winding component; 931-winding drum; 932-perforation; 933-winding spring; 934-axle rod; 935-limiting plate; 94-worm wheel; 95-worm; 96-bottom block; 97-second support rod. DETAILED DESCRIPTION

[0069] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0070] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0071] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0072] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0073] At present, there are two types of common nondestructive testing instruments for concrete thickness on the market. One is a double-sided handheld testing instrument, which includes a receiving probe and a transmitting probe respectively installed on the upper and lower surfaces of the building floor. During the test, the installation positions of the receiving probe and the transmitting probe need to be aligned up and down, and the handheld testing instrument is wirelessly connected to the receiving probe. The other is a single-sided testing instrument, that is, the concrete thickness is tested by attaching the testing instrument to the concrete layer. However, in the actual use of the single-sided testing instrument, there are still certain shortcomings. First, the single-sided testing instrument cannot detect the concrete thickness at different heights when working; second, when detecting the concrete thickness at a higher position, the angle of the testing instrument at a high position cannot be quickly adjusted according to the slope of the wall; third, when testing the ground or a high-level wall with a slope, when multiple positions need to be tested, the position of the testing instrument needs to be constantly adjusted, and the testing instrument needs to be held or lifted up to move, which is more troublesome to operate, time-consuming and labor-intensive, greatly increases the degree of labor, and the overall adaptability is poor.

[0074] In response to the above problems, an embodiment of the present application provides a non-destructive testing device for concrete thickness, which can adjust the horizontality of the mounting mechanism by setting an angle adjustment mechanism between the mounting mechanism and the lifting and supporting mechanism, and adjust the working angle of the detector body under the cooperation of the angle adjustment mechanism and the third traction mechanism, so that the detector body can better adapt to the detection of concrete with different slopes, thereby improving the efficiency of concrete thickness detection; and the present application movably installs the detector body through the mounting mechanism, and under the cooperation of the second traction mechanism, the clamping and dragging mechanism and the first traction mechanism, the detector body can be installed at a height adjustment in the placement frame of the mounting mechanism. When moving, the detector body is retracted to the inside of the mounting mechanism so that the detector body will not be damaged by friction with the concrete surface. After arriving at the location to be tested, it is extended from the inside of the placement frame again to fit the concrete surface for detection, so that the detector body can well adapt to the concrete thickness detection work under various conditions, thereby improving the concrete thickness detection speed at different positions.

[0075] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0076] Figure 1 It is a schematic diagram of the structure of a nondestructive testing device for concrete thickness shown in an embodiment of the present application.

[0077] See also Figure 1 , a nondestructive testing device for concrete thickness, comprising:

[0078] A lifting and supporting mechanism 1, a detector body 2, a mounting mechanism 3, an angle adjustment mechanism 4, a first traction mechanism 5, a clamping and dragging mechanism 6, a second traction mechanism 8 and a third traction mechanism 9;

[0079] The mounting mechanism 3 is mounted on the top of the lifting and supporting mechanism 1 through the angle adjustment mechanism 4 , and the angle between the mounting mechanism 3 and the lifting and supporting mechanism 1 is adjusted through the angle adjustment mechanism 4 .

[0080] Specifically, the lifting and supporting mechanism 1 includes a first hollow telescopic rod 11, an overlapped end 12, a plug hole 13, a second hollow telescopic rod 14, a third hollow telescopic rod 15, a reset spring 16 and an insert block 17; the second hollow telescopic rod 14 is slidably sleeved in the third hollow telescopic rod 15, the first hollow telescopic rod 11 is slidably sleeved in the second hollow telescopic rod 14, and the insert holes 13 are equidistantly provided on the outer walls of the first hollow telescopic rod 11 and the second hollow telescopic rod 14. The second hollow telescopic rod 14 and the third hollow telescopic rod 15 are provided with an overlapped end 12 at the upper end, an insert cavity is provided inside the overlapped end 12, an insert block 17 matching the plug hole 13 is slidably sleeved inside the insert cavity, a certain angle exists at the front end of the insert block 17, and a reset spring 16 is provided between the insert block 17 and the insert cavity, so that the angle shrinks backward under a certain pressure, and rebounds and resets after the pressure disappears.

[0081] When in use, the overall length of the lifting and supporting mechanism 1 is adjusted according to the height of the top concrete, and the first hollow telescopic rod 11 is forcibly pulled out from the second hollow telescopic rod 14. When the length is still insufficient, the second hollow telescopic rod 14 is forcibly pulled out from the third hollow telescopic rod 15. During the pulling out process, a large squeeze is generated between the plug block 17 and the socket 13, so that the plug block 17 is separated from the socket 13 and the reset spring 16 is compressed. When the appropriate length is reached, the pulling out of the first hollow telescopic rod 11 and the second hollow telescopic rod 14 is stopped, and under the action of the reset spring 16, the plug block 17 is reinserted into the socket 13 to complete the self-locking.

[0082] The angle adjustment mechanism 4 includes a rotating block 41, an angle scale 42, a fixed block 43, a right-angle slot 44, a T-block 45, a connecting spring 46 and an arc-shaped slideway 47; the fixed block 43 is fixedly mounted on the top of the first hollow telescopic rod 11, and two T-blocks 45 are symmetrically mounted on the outer walls on both sides of the fixed block 43. An arc-shaped slideway 47 for the T-block 45 to slide is provided inside the rotating block 41, a connecting spring 46 is arranged inside the arc-shaped slideway 47, a connecting spring 46 is installed inside the arc-shaped slideway 47, and an angle scale 42 is arranged on the outer wall of the rotating block 41. The fixed block 43 can be rotatably mounted in the arc-shaped slideway 47 of the rotating block 41 through the T-block 45, and the two ends of the connecting spring 46 are respectively fixedly connected to the ends of the T-block 45 and the arc-shaped slideway 47, and the rotating block 41 is controlled to reset by the connecting spring 46. A right-angle slot 44 is formed inside the fixing block 43 , so that the first traction mechanism 5 passes through the right-angle slot 44 to connect with the mounting mechanism 3 , and controls the mounting mechanism 3 to rotate along with the rotating block 41 .

[0083] The mounting mechanism 3 is mounted on the rotating block 41 of the angle adjustment mechanism 4, and the mounting mechanism 3 includes a moving wheel 31, a placement frame 32, an outer cylinder 33, a support spring 34 and an inner rod 35; a moving wheel 31 is respectively arranged at the four corners of the top of the placement frame 32. Four outer cylinders 33 distributed in a rectangular shape are arranged at the bottom of the inner cavity of the placement frame 32, and an inner rod 35 is slidably sleeved on each outer cylinder 33, and a support spring 34 is sleeved on the inner rod 35. The top of the inner rod 35 is connected to the bottom of the detector body 2, and the detector body 2 can be extended and retracted along with the inner rod 35 under the action of external force.

[0084] The first traction mechanism 5 , the second traction mechanism 8 and the third traction mechanism 9 are installed at the lower end of the lifting and supporting mechanism 1 ; the third traction mechanism 9 passes through the lifting and supporting mechanism 1 to connect the angle adjustment mechanism 4 , and traction controls the rotation angle of the angle adjustment mechanism 4 .

[0085] Specifically, the third traction mechanism 9 includes a winding roller 91, a third traction rope 92, a second winding component 93, a worm wheel 94, a worm 95, a bottom block 96 and a second support rod 97; the second support rod 97 is installed on the outer wall of the lower end of the third hollow telescopic rod 15, and a second winding component 93 for winding the third traction rope 92 is arranged between the second support rods 97. The second winding component 93 includes a winding drum 931, a perforation 932, a coil spring 933, a shaft 934 and a limit plate 935; the winding drum 931 is installed between the two second support rods 97, and a perforation 932 for the third traction rope 92 to shuttle is opened on the outer wall of the winding drum 931. A shaft 934 for winding the third traction rope 92 is rotatably installed inside the winding drum 931, two limit plates 935 are arranged on both sides of the shaft 934, and a coil spring 933 is installed between the shaft 934 and the inner wall of the winding drum 931. The winding roller 91 is rotatably mounted between the two second support rods 97, the third traction rope 92 slides through the winding roller 91, a worm wheel 94 is mounted on the outside of the second support rod 97 and is coaxial with the winding roller 91, a worm 95 is meshedly mounted on one side of the worm wheel 94, the worm 95 is rotatably mounted on the bottom block 96 of the outer wall of the second support rod 97, and the worm 95 is rotated by external force. The third traction rope 92 passes through the lifting and supporting mechanism 1 and the angle adjustment mechanism 4 in sequence and is connected to the bottom of the installation mechanism 3.

[0086] When inspecting the side wall or the concrete on the top surface with a certain slope, the worm gear 94 is driven to rotate by rotating the worm gear 95, and the worm gear 94 drives the winding roller 91 to rotate. The winding roller 91 winds up the third traction rope 92, so that the third traction rope 92 is continuously extended from the second winding component 93, and the shaft rod 934 is pulled by the third traction rope 92 to rotate, and the winding spring 933 is tightened, and the placement frame 32 is pulled on the other side to make the T-block 45 slide inside the arc slide 47, and the connecting spring 46 is compressed, so that the placement frame 32 drives the two rotating blocks 41 and the fixed block 43 to rotate relative to each other, thereby completing the angle adjustment of the placement frame 32, ensuring that the detector body 2 installed on the inner side of the placement frame 32 can be smoothly attached to the concrete wall to be tested.

[0087] Specifically, the first traction mechanism 5 includes a first traction rope 51, a first support rod 52 and a first winding component 53; the first support rod 52 is installed on the outer wall of the lower end of the third hollow telescopic rod 15, and is aligned with the installation position of the third traction mechanism 9. A first winding component 53 for winding the first traction rope 51 is installed between the first support rods 52. The structure of the first winding component 53 is the same as that of the second winding component 93. The first traction rope 51 passes through the lifting and supporting mechanism 1, the clamping and dragging mechanism 6, and the angle adjustment mechanism 4 in sequence and extends to the inside of the installation mechanism and is connected to the bottom of the detector body 2.

[0088] Specifically, the second traction mechanism 8 includes a handle 7, a positioning spring 81, a pressing rod 82 and a second traction rope 83; the handle 7 is mounted on the third hollow telescopic rod 15 below the first traction mechanism 5. The pressing rod 82 is rotatably mounted on the inner wall of the handle 7, a positioning spring 81 is connected between the pressing rod 82 and the top of the handle 7, a second traction rope 83 is installed on the lower side of the pressing rod 82, and the second traction rope 83 slides through the top of the handle 7 and is connected to the clamping and dragging mechanism 6.

[0089] Specifically, the clamping and dragging mechanism 6 is installed in the third hollow telescopic rod 15 at the front end of the first traction mechanism 5, and the clamping and dragging mechanism 6 is respectively connected to the first traction mechanism 5 and the second traction mechanism 8, wherein the clamping and dragging mechanism 6 includes a traction block 61, a clamping plate 62, a wedge seat 63, a V-clamp 64, an active cavity 65, a top plate 66, a guide rod 67, a suspension spring 68 and a guide groove 69; the wedge seat 63 and the active cavity 65 are installed in the third hollow telescopic rod 15, and two guide grooves 69 are arranged on the upper side of the active cavity 65, and a guide rod 67 is slidably sleeved inside the guide groove 69, and the top end of the guide rod 67 is connected to the top of the guide groove 69 by a suspension spring 68, and the bottom ends of the two guide rods 67 are installed on the top plate 66, and a second cross bar 661 is installed on the internal slide groove of the top plate 66, and the second cross bar 661 runs through the inside of the two clamping plates 62, and a second spring 662 is sleeved on the second cross bar 661 between the two clamping plates 62. A V-shaped clamp 64 for clamping the first traction rope 51 is arranged between the inner walls of the two clamps 62. The bottoms of the two clamps 62 are slidably mounted on the traction block 61. A first crossbar 611 is mounted on the internal slide groove of the traction block 61. The first crossbar 611 runs through the inside of the two clamps 62. A first spring 612 is sleeved on the first crossbar 611 between the two clamps 62. The traction block 61 is slidably sleeved between the two wedge-shaped seats 63. The second traction rope 83 of the second traction mechanism 8 extends between the two wedge-shaped seats 63 and is connected to the bottom end of the traction block 61.

[0090] When in use, the third hollow telescopic rod 15 is held by the handle 7, so that an angle is formed between the lifting and supporting mechanism 1 and the foundation, which makes it convenient for personnel to push the installation mechanism 3 through the lifting and supporting mechanism 1. Afterwards, the angle of the installation mechanism 3 is adjusted by the third traction mechanism 9, so that after the lifting and supporting mechanism 1 forms an angle with the foundation, the installation mechanism 3 can be placed parallel to the foundation, so that the detector body 2 can fit the concrete foundation for detection. When it is necessary to detect at different positions of the concrete foundation, the pressing rod 82 is pressed, the positioning spring 81 is stretched, the pressing rod 82 pulls the second traction rope 83, and the second traction rope 83 pulls the traction block 61 downward, and the traction block 61 drives the two clamping plates 62, the top plate 66 and the guide rod 67 to move downward, so that the two clamping plates 62 are squeezed with the wedge-shaped seat 63, and the two clamping plates 62 are brought close to each other, so that the first traction rope 51 can be clamped by the two V-clamps 64 (initially, the first traction rope 51 can slide freely between the two V-clamps 64), and then the V-clamp 64 can pull the first traction rope 51 downward, so that the first traction rope 51 continues to extend from the first winding component 53 on one side, and pulls the detector body 2 on the other side, so that the detector body 2 retracts to the inside of the mounting mechanism 3. At this time, under the joint action of the four moving wheels 31, it is convenient to push the placement frame 32 through the handle 7 and the lifting and supporting mechanism 1.

[0091] The present application also provides another embodiment of a nondestructive testing instrument for concrete thickness.

[0092] like Figure 1 , Figure 5 as well as Figure 7 As shown, a nondestructive testing instrument for concrete thickness includes: a testing instrument body 2, and a mounting mechanism 3 is arranged outside the testing instrument body 2, and the mounting mechanism 3 is used for movably mounting the testing instrument body 2.

[0093] The mounting mechanism 3 includes a placement frame 32, and a moving wheel 31 is respectively arranged at the top of the four corners of the placement frame 32. Four outer cylinders 33 distributed in a rectangular shape are fixedly connected to the bottom of the inner cavity of the placement frame 32. An inner rod 35 is slidably sleeved inside each outer cylinder 33. The top of the inner rod 35 is fixedly connected to the bottom of the detector body 2. A support spring 34 is connected between the top of the outer cylinder 33 and the bottom of the detector body 2. The support spring 34 is sleeved on the inner rod 35. Under the joint action of the inner rod 35, the support spring 34 and the outer cylinder 33, a force perpendicular to the placement frame 32 can be applied to the detector body 2 installed inside the placement frame 32, so that the detector body 2 moves up and down inside the placement frame 32.

[0094] A lifting and supporting mechanism 1 is provided at the lower side of the mounting mechanism 3 for adjusting the working height of the mounting mechanism 3. The lifting and supporting mechanism 1 comprises a third hollow telescopic rod 15, a second hollow telescopic rod 14 slidably sleeved inside the third hollow telescopic rod 15, and a first hollow telescopic rod 11 slidably sleeved inside the second hollow telescopic rod 14. The lifting and supporting mechanism 1 also comprises jacks 13 equidistantly provided on the outer walls of the first hollow telescopic rod 11 and the second hollow telescopic rod 14, a lap end 12 is fixedly connected to the top of the second hollow telescopic rod 14, an inserting cavity is provided on the inner side of the upper end of the second hollow telescopic rod 14 and the third hollow telescopic rod 15, an inserting block 17 matching the inserting hole 13 is slidably sleeved inside the inserting cavity, and a reset spring 16 is fixedly connected between the inserting block 17 and the inserting cavity.

[0095] When in use, the overall length of the lifting and supporting mechanism 1 is adjusted according to the height of the top concrete, and the first hollow telescopic rod 11 is pulled out from the second hollow telescopic rod 14. When the length is insufficient, the second hollow telescopic rod 14 is pulled out from the third hollow telescopic rod 15. During this process, a large squeeze is generated between the plug block 17 and the socket 13, so that the plug block 17 is separated from the socket 13 and the reset spring 16 is compressed. When the appropriate length is reached, the first hollow telescopic rod 11 and the second hollow telescopic rod 14 are stopped from being pulled out. Under the action of the reset spring 16, the plug block 17 is re-inserted into the socket 13 to complete the self-locking. After that, the detector body 2 can be attached to the concrete to be tested.

[0096] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 6 As shown, an angle adjustment mechanism 4 is arranged between the mounting mechanism 3 and the first hollow telescopic rod 11, and a third traction mechanism 9 is arranged outside the third hollow telescopic rod 15. With the cooperation of the angle adjustment mechanism 4 and the third traction mechanism 9, the deflection degree of the mounting mechanism 3 can be adjusted, so that the working angle of the detector body 2 can be adjusted.

[0097] The angle adjustment mechanism 4 includes two rotating blocks 41 fixed in parallel to the bottom of the placement frame 32 and a fixed block 43 fixed to the top of the first hollow telescopic rod 11, a right-angle groove 44 is opened inside the fixed block 43, an angle scale 42 is set on the outer wall of the rotating block 41, the fixed block 43 is rotatably connected to the rotating block 41, two T-blocks 45 are symmetrically fixed on the outer wall of the fixed block 43, an arc-shaped slide 47 for the T-block 45 to slide is opened inside the rotating block 41, a connecting spring 46 is set inside the arc-shaped slide 47, and the two ends of the connecting spring 46 are respectively fixed to the ends of the T-block 45 and the arc-shaped slide 47.

[0098] The third traction mechanism 9 includes a third traction rope 92 and two second support rods 97 fixed to the outer wall of the third hollow telescopic rod 15, a second winding component 93 for winding the third traction rope 92 is commonly arranged between the two second support rods 97, a winding roller 91 is rotatably connected between the two second support rods 97, the third traction rope 92 slides through the winding roller 91, a worm gear 94 coaxially arranged with the winding roller 91 is rotatably connected on the outer wall of the second support rod 97, a worm 95 is meshingly connected on one side of the worm gear 94, a bottom block 96 is fixed to the outer wall of the second support rod 97, the worm 95 is rotatably connected to the bottom block 96, the third traction rope 92 passes through the third hollow telescopic rod 15, the second hollow telescopic rod 14, the first hollow telescopic rod 11, the right-angle groove 44 in sequence and is fixed to the bottom of the mounting mechanism 3.

[0099] Among them, the second winding component 93 includes a winding drum 931 fixedly connected between the two second support rods 97, a through hole 932 is penetrated on the outer wall of the winding drum 931 for the third traction rope 92 to shuttle through, an axle rod 934 is rotatably connected inside the winding drum 931 for winding the third traction rope 92, two limit plates 935 are fixedly connected to the outer wall of the axle rod 934, and a coil spring 933 is connected between the axle rod 934 and the inner wall of the winding drum 931.

[0100] When inspecting the side wall or measuring the top concrete with a certain slope, the worm gear 94 is rotated by rotating the worm gear 95, and the worm gear 94 drives the winding roller 91 to rotate. The winding roller 91 winds up the third traction rope 92, so that the third traction rope 92 is continuously extended from the second winding component 93 and released from the shaft rod 934. The shaft rod 934 is pulled by the third traction rope 92 to rotate and tighten the winding spring 933. On the other hand, the placement frame 32 is pulled, so that the placement frame 32 drives the two rotating blocks 41 and the fixed block 43 to rotate relative to each other, so that the T-block 45 slides inside the arc slide 47 and compresses the connecting spring 46, thereby completing the angle adjustment of the placement frame 32, so that the detector body 2 installed on the inner side of the placement frame 32 can be smoothly attached to the concrete wall to be tested.

[0101] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 8 , Fig. 9 as well as Fig.10 As shown, a first traction mechanism 5 is provided on the outside of the third hollow telescopic rod 15, and a handle 7 is fixed on the outside of the third hollow telescopic rod 15 below the first traction mechanism 5 for supporting the third hollow telescopic rod 15, a second traction mechanism 8 is provided on the inside of the handle 7, and a clamping and dragging mechanism 6 is provided on the side wall of the third hollow telescopic rod 15. With the cooperation of the second traction mechanism 8, the clamping and dragging mechanism 6 and the first traction mechanism 5, the installation depth of the detector body 2 on the inner side of the installation mechanism 3 can be adjusted.

[0102] The first traction mechanism 5 includes a first traction rope 51 and two first support rods 52 fixedly connected to the outer wall of the third hollow telescopic rod 15. A first winding component 53 for winding the first traction rope 51 is commonly provided between the two first support rods 52. The second winding component 93 has the same structural composition as the first winding component 53. The first traction rope 51 passes through the third hollow telescopic rod 15, the second hollow telescopic rod 14, the first hollow telescopic rod 11, and the fixed block 43 in sequence and extends to the inside of the placement frame 32 and is fixedly connected to the bottom of the detector body 2.

[0103] The second traction mechanism 8 includes a pressing rod 82 rotatably connected to the inner wall of the handle 7, a positioning spring 81 is connected between the pressing rod 82 and the top of the handle 7, a second traction rope 83 is connected to the lower outer wall of the pressing rod 82, and the second traction rope 83 slides through the top of the handle 7.

[0104] The clamping and dragging mechanism 6 includes an active cavity 65 provided on the outer wall of the third hollow telescopic rod 15, and two guide grooves 69 connected to the active cavity 65 are provided inside the third hollow telescopic rod 15 located on the upper side of the active cavity 65. Guide rods 67 are slidably sleeved inside the two guide grooves 69, and a suspension spring 68 is connected between the top of the guide rod 67 and the top of the guide groove 69. A top plate 66 is commonly fixed to the bottom ends of the two guide rods 67, and two clamps 62 are symmetrically arranged at the bottom end of the top plate 66. V-shaped clamps 64 for clamping the first traction rope 51 are fixed between the opposite inner walls of the two clamps 62, and a traction block 61 is commonly arranged between the bottoms of the two clamps 62. Two wedge-shaped seats 63 are symmetrically fixed to the bottom of the active cavity 65, and the traction block 61 is slidably sleeved between the two wedge-shaped seats 63. The second traction rope 83 extends between the two wedge-shaped seats 63 and is fixed to the bottom end of the traction block 61. A second crossbar 661 is fixedly connected inside the top plate 66, and the second crossbar 661 slides through the inside of the two clamping plates 62, and a second spring 662 is connected between the two clamping plates 62, and the second spring 662 is sleeved outside the second crossbar 661. A first crossbar 611 is fixedly connected inside the traction block 61, and the first crossbar 611 slides through the inside of the two clamping plates 62, and a first spring 612 is connected between the two clamping plates 62, and the first spring 612 is sleeved outside the second crossbar 661.

[0105] When testing the thickness of foundation concrete, the third hollow telescopic rod 15 is held by the handle 7 to form an angle between the lifting and supporting mechanism 1 and the foundation (to facilitate personnel to push the installation mechanism 3 through the lifting and supporting mechanism 1). Afterwards, the angle of the installation mechanism 3 is adjusted by the third traction mechanism 9. After the lifting and supporting mechanism 1 forms an angle with the foundation, the installation mechanism 3 can be placed parallel to the foundation, so that the detector body 2 can fit the concrete foundation for testing. When it is necessary to detect at different positions of the concrete foundation, the pressing rod 82 is pressed, the positioning spring 81 is stretched, the pressing rod 82 pulls the second traction rope 83, and the second traction rope 83 pulls the traction block 61 downward, and the traction block 61 drives the two clamping plates 62, the top plate 66 and the guide rod 67 to move downward, so that the two clamping plates 62 are squeezed with the wedge-shaped seat 63, and the two clamping plates 62 are brought close to each other, so that the first traction rope 51 can be clamped by the two V-clamps 64 (initially, the first traction rope 51 can slide freely between the two V-clamps 64), and then the V-clamp 64 can pull the first traction rope 51 downward, so that the first traction rope 51 continues to extend from the first winding component 53 on one side, and pulls the detector body 2 on the other side, so that the detector body 2 retracts to the inside of the mounting mechanism 3. At this time, under the joint action of the four moving wheels 31, it is convenient to push the placement frame 32 through the handle 7 and the lifting and supporting mechanism 1.

[0106] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A non-destructive testing device for concrete thickness, comprising a testing instrument body (2), characterized in that: Also includes: A lifting and supporting mechanism (1), a mounting mechanism (3), an angle adjustment mechanism (4), and a third traction mechanism (9); The mounting mechanism (3) is mounted on the top of the lifting and supporting mechanism (1) through an angle adjustment mechanism (4); the angle adjustment mechanism (4) comprises a rotating block (41) and a fixed block (43); the rotating block (41) is mounted on the side of the fixed block (43); the mounting mechanism (3) is mounted on the rotating block (41); and the angle between the mounting mechanism (3) and the lifting and supporting mechanism (1) is adjusted through the angle adjustment mechanism (4); The third traction mechanism (9) is installed at the lower end of the lifting support mechanism (1), and the third traction mechanism (9) comprises a winding roller (91), a third traction rope (92), a worm wheel (94), a worm (95), and a second support rod (97); The winding roller (91) and the worm wheel (94) are rotatably mounted on the second support rod (97); the third traction rope (92) slides through the interior of the winding roller (91); a worm (95) is meshingly mounted on one side of the worm wheel (94); the winding roller (91) is driven to rotate by rotating the worm (95) mounted on the second support rod (97) to reel in the third traction rope (92); the third traction rope (92) passes through the lifting and supporting mechanism (1) and the interior of the angle adjustment mechanism (4) in turn and is connected to the bottom of the mounting mechanism (3); the rotation angle of the angle adjustment mechanism (4) is controlled by retracting and releasing the third traction rope (92).

2. The nondestructive testing device for concrete thickness according to claim 1, characterized in that: The angle adjustment mechanism (4) comprises: A rotating block (41), an angle measuring scale (42), a fixed block (43), a right angle slot (44), a T-block (45), a connecting spring (46) and an arc-shaped slideway (47); The fixing block (43) is mounted on the top of the first hollow telescopic rod (11), and two T-shaped blocks (45) are symmetrically mounted on the outer wall of the fixing block (43); An arc-shaped slideway (47) for sliding the T-shaped block (45) is provided inside the rotating block (41), a connecting spring (46) is provided inside the arc-shaped slideway (47), a connecting spring (46) is installed inside the arc-shaped slideway (47), and an angle measuring scale (42) is provided on the outer wall of the rotating block (41); The fixed block (43) is rotatably mounted in the arc-shaped slideway (47) of the rotating block (41) through the T-shaped block (45), and the two ends of the connecting spring (46) are respectively fixed to the ends of the T-shaped block (45) and the arc-shaped slideway (47), and the rotating block (41) is controlled to reset through the connecting spring (46); A right-angle groove (44) is provided inside the fixed block (43), so that the first traction mechanism (5) passes through the right-angle groove (44) to connect to the mounting mechanism (3), and the mounting mechanism (3) is controlled to rotate along with the rotating block (41).

3. The nondestructive testing device for concrete thickness according to claim 1, characterized in that: The third traction mechanism (9) comprises: A winding roller (91), a third traction rope (92), a second winding component (93), a worm wheel (94), a worm (95), a bottom block (96) and a second support rod (97); The second support rod (97) is mounted on the outer wall of the lower end of the lifting and supporting mechanism (1), and a second winding component (93) for winding the third traction rope (92) is arranged between the second support rods (97); The winding roller (91) is rotatably mounted between the second supporting rods (97), the third traction rope (92) slides through the winding roller (91), a worm wheel (94) coaxially arranged with the winding roller (91) is mounted on the outside of the second supporting rod (97), a worm (95) is meshedly mounted on one side of the worm wheel (94), and the worm (95) is rotatably mounted on a bottom block (96) on the outer wall of the second supporting rod (97); The third traction rope (92) passes through the lifting and supporting mechanism (1) and the angle adjustment mechanism (4) in sequence and is connected to the bottom of the installation mechanism (3).

4. The nondestructive testing device for concrete thickness according to claim 3 is characterized in that: The second winding component (93) comprises: A winding drum (931), a perforation (932), a coil spring (933), a shaft (934) and a limiting plate (935); The winding drum (931) is installed between the two second support rods (97), and a through hole (932) is provided on the outer wall of the winding drum (931) for the third traction rope (92) to pass through; A shaft rod (934) for winding up the third traction rope (92) is rotatably installed inside the winding drum (931), two limit plates (935) are arranged on both sides of the shaft rod (934), and a coil spring (933) is installed between the shaft rod (934) and the inner wall of the winding drum (931).

5. The nondestructive testing device for concrete thickness according to claim 1, characterized in that: The mounting mechanism (3) comprises: A moving wheel (31), a placing frame (32), an outer cylinder (33), a supporting spring (34) and an inner rod (35); A moving wheel (31) is respectively arranged at the four corners of the top of the placement frame (32); Four outer cylinders (33) are arranged in a rectangular shape at the bottom of the inner cavity of the placement frame (32). An inner rod (35) is slidably sleeved on each outer cylinder (33). A support spring (34) is sleeved on the inner rod (35). The top end of the inner rod (35) is fixedly connected to the bottom of the detector body (2).

6. The nondestructive testing device for concrete thickness according to claim 1, characterized in that: The lifting and supporting mechanism (1) comprises: A first hollow telescopic rod (11), an overlapping end (12), an insertion hole (13), a second hollow telescopic rod (14), a third hollow telescopic rod (15), a return spring (16) and an insertion block (17); The second hollow telescopic rod (14) is slidably sleeved in the third hollow telescopic rod (15), the first hollow telescopic rod (11) is slidably sleeved in the second hollow telescopic rod (14), and the outer walls of the first hollow telescopic rod (11) and the second hollow telescopic rod (14) are provided with insertion holes (13) at equal distances; The upper ends of the second hollow telescopic rod (14) and the third hollow telescopic rod (15) are provided with overlapping ends (12), the inner side of the overlapping ends (12) is provided with an insertion cavity, an insertion block (17) matching with the insertion hole (13) is slidably sleeved inside the insertion cavity, and a return spring (16) is installed between the insertion block (17) and the insertion cavity.

7. The nondestructive testing device for concrete thickness according to claim 1, characterized in that: Also includes: A first traction mechanism (5), a clamping and dragging mechanism (6) and a second traction mechanism (8); The second traction mechanism (8) and the third traction mechanism (9) are installed at the lower end of the lifting and supporting mechanism (1); The clamping and dragging mechanism (6) is installed in the lifting and supporting mechanism (1), and the clamping and dragging mechanism (6) is respectively connected to the first traction mechanism (5) and the second traction mechanism (8); The first traction mechanism (5) passes through the lifting and supporting mechanism (1), the clamping and dragging mechanism (6) and the angle adjustment mechanism (4) to connect to the detector body (2) installed on the mounting mechanism (3); the second traction mechanism (8) controls the traction rope of the first traction mechanism (5) by pulling the clamping and dragging mechanism (6), thereby realizing the upper and lower relative position control of the detector body (2) in the mounting mechanism (3).

8. The nondestructive testing device for concrete thickness according to claim 7, characterized in that: The first traction mechanism (5) comprises: A first traction rope (51), a first support rod (52) and a first winding component (53); The first support rod (52) is mounted on the outer wall of the lower end of the lifting and supporting mechanism (1), and a first winding component (53) for winding the first traction rope (51) is mounted between the first support rods (52). The first traction rope (51) passes through the lifting and supporting mechanism (1), the clamping and dragging mechanism (6), and the angle adjustment mechanism (4) in sequence and extends to the inside of the installation mechanism to be connected to the bottom of the detector body (2).

9. The nondestructive testing device for concrete thickness according to claim 7, characterized in that: The second traction mechanism (8) comprises: A handle (7), a positioning spring (81), a pressing rod (82) and a second traction rope (83); The handle (7) is mounted on the lifting and supporting mechanism (1) below the first traction mechanism (5); The pressing rod (82) is rotatably mounted on the inner wall of the handle (7); a positioning spring (81) is connected between the pressing rod (82) and the top of the handle (7); a second traction rope (83) is mounted on the lower side of the pressing rod (82); the second traction rope (83) slides through the top of the handle (7) and is connected to the clamping and dragging mechanism (6).

10. The nondestructive testing device for concrete thickness according to claim 7, characterized in that: The clamping and dragging mechanism (6) comprises: A traction block (61), a clamping plate (62), a wedge-shaped seat (63), a V-shaped clamp (64), a movable cavity (65), a top plate (66), a guide rod (67), a suspension spring (68) and a guide groove (69); The wedge-shaped seat (63) and the movable cavity (65) are installed in the lifting support mechanism (1). Two guide grooves (69) are arranged on the upper side of the movable cavity (65). A guide rod (67) is provided in the sliding sleeve inside the guide groove (69). The top end of the guide rod (67) is connected to the top of the guide groove (69) by a suspension spring (68). The bottom ends of the two guide rods (67) are installed on the top plate (66). Two clamping plates (62) that can slide relative to each other are symmetrically arranged at the lower end of the top plate (66); a second crossbar (661) is installed on the internal sliding groove of the top plate (66); the second crossbar (661) runs through the inside of the two clamping plates (62); and a second spring (662) is sleeved on the second crossbar (661) between the two clamping plates (62); A V-shaped clamp (64) for clamping the first traction rope (51) is arranged between the inner walls of the two clamping plates (62), and the bottoms of the two clamping plates (62) are slidably mounted on the traction block (61); A first cross bar (611) is installed on the internal sliding groove of the traction block (61), the first cross bar (611) runs through the inside of the two clamping plates (62), and a first spring (612) is sleeved on the first cross bar (611) between the two clamping plates (62); The traction block (61) is slidably sleeved between the two wedge-shaped seats (63), and the second traction rope (83) of the second traction mechanism (8) extends between the two wedge-shaped seats (63) and is connected to the bottom end of the traction block (61).

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