Shearing force detection device for building spandrel girder

Abstract

The invention relates to the technical field of building spandrel girder shearing force detection, in particular to a building spandrel girder shearing force detection device which comprises a digital display resiliometer, a connecting frame is arranged on the upper side of the digital display resiliometer, transverse plates are installed at the two ends of the connecting frame, and a U-shaped frame used for being clamped to a spandrel girder is arranged at one end of each transverse plate. Four guide grooves perpendicular to the side face of the bearing beam are formed in the upper surface of the transverse plate, four inclined grooves used for communicating two adjacent guide grooves are formed in the upper surface of the transverse plate, a supporting frame arranged in the length direction of the guide grooves is installed on the upper surface of the transverse plate, and a first bent rod and a second bent rod are installed on the outer surface of the digital display rebound instrument; the end, away from the digital display rebound apparatus, of the first bent rod and the end, away from the digital display rebound apparatus, of the second bent rod are each provided with two protruding ring parts located on the upper side of the transverse plate and two protruding ring parts located on the lower side of the transverse plate. And the operation procedure of moving the digital display resiliometer is simplified.

Description

Technical Field

[0001] The invention discloses a shear force detection device for a building load-bearing beam, and belongs to the technical field of shear force detection for building load-bearing beams. Background Art

[0002] The strength of a material refers to its ability to resist damage. For a building load-bearing beam, the higher the strength of the material, the stronger the shear resistance of the beam is generally. Taking a concrete beam as an example, when the compressive strength and tensile strength of the concrete are high, it can better withstand the shear stress generated by the shear force and reduce the possibility of the beam being damaged by shear. In order to ensure the safety of the load-bearing beam during use, the strength of the beam material must meet the requirements of resisting shear force. The digital rebound tester is one of the commonly used equipment for shear force detection of building load-bearing beams. According to the detection object, the appropriate measurement area is selected. Generally, it is evenly arranged on the surface of the load-bearing beam, and the measurement area should not be larger than 200mm×200mm. Each measurement area should be evenly struck with 16 points. The 16 marking points are arranged with four marking points in the horizontal direction and four marking points in the vertical direction. The 3 maximum values ​​and 3 minimum values ​​are eliminated, and the average value of the remaining 10 rebound values ​​is taken as the rebound representative value of the measurement area.

[0003] The working mechanism of the digital rebound tester is to use a spring to drive the impact hammer, which acts on the concrete surface through the impact rod, and the compressive strength of the concrete is calculated based on the measured rebound value. During the entire impact operation, it is necessary to ensure that the axis of the digital rebound tester is always perpendicular to the concrete test surface, and the digital rebound tester must be tightly fitted to the concrete surface. Only in this way can the energy generated during the impact process be efficiently transferred to the concrete, and then the rebound value can be accurately measured. In the actual construction project quality inspection scenario, the digital rebound tester is used frequently. Taking the construction of high-rise residential buildings as an example, in order to detect a large number of concrete load-bearing columns, beams and other structures, the inspectors have to operate the digital rebound tester many times a day. If the operation is improper, such as the digital rebound tester not meeting the requirements of the wall, the test data will be inaccurate. In the process of operating the digital rebound tester, the inspectors will have an extra step to keep the digital rebound tester perpendicular to the measured surface and spend energy to move the digital rebound tester the same distance in the horizontal direction to meet the needs of the spacing between two adjacent marking points. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a shear force detection device for a building load-bearing beam to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: a shear force detection device for a building load-bearing beam, including a digital rebound tester, a connecting frame is provided on the upper side of the digital rebound tester, and cross plates are installed at both ends of the connecting frame. One end of the cross plate is provided with a U-shaped frame for clamping on the load-bearing beam, and the upper surface of the cross plate is provided with four guide grooves arranged perpendicularly to the side of the load-bearing beam, and the upper surface of the cross plate is provided with four oblique grooves for connecting two adjacent guide grooves, and the oblique grooves and the guide grooves are arranged alternately. The right side of the cross plate is provided with a U-shaped groove connected to the rightmost side of the cross plate. An inlet communicated with the guide groove, an outlet communicated with the leftmost oblique groove on the horizontal plate is opened on the right side of the horizontal plate, a support frame arranged along the length direction of the guide groove is installed on the upper surface of the horizontal plate, a first bent rod and a second bent rod are installed on the outer surface of the digital rebound instrument, one end of the first bent rod away from the digital rebound instrument and one end of the second bent rod away from the digital rebound instrument are inserted in the channel formed by the corresponding guide groove and the oblique groove, and two convex ring parts are installed on one end of the first bent rod away from the digital rebound instrument and one end of the second bent rod away from the digital rebound instrument respectively.

[0006] Specifically, an arm is installed at one end of the two horizontal plates close to the U-shaped frame, a rectangular groove is provided at one end of the upper surface of the arm away from the horizontal plate, a rectangular column is inserted in the rectangular groove, the lower end of the rectangular column is connected and fixed to the U-shaped frame, there is a gap between the rectangular column and the U-shaped frame, and four rectangular cavities are provided equidistantly from top to bottom on the side of the rectangular column facing the U-shaped frame, a blocking part for limiting the relative position of the arm and the rectangular column is inserted on the side of the rectangular cavity close to the U-shaped frame, one end of the blocking part extends to the outside of the rectangular cavity, two return springs are installed at one end of the blocking part in the rectangular cavity, a blocking cover is connected to the end of the return spring away from the blocking part, the blocking cover is installed on the side of the rectangular cavity away from the blocking part, and an extrusion piece for locking the blocking part in the rectangular cavity is installed on the two horizontal plates.

[0007] Specifically, the extrusion member includes a guide sleeve, a guide sleeve is installed at the lower left corner of the two horizontal plates, a linkage rod is inserted in the guide sleeve, and a horizontal hole is opened on the side of the two horizontal plates facing away from the U-shaped frame, the horizontal hole is communicated with the leftmost oblique groove on the horizontal plate, one end of the linkage rod passes through the horizontal hole and extends into the corresponding oblique groove, a pressure ring is provided on the side of the horizontal hole away from the oblique groove, the pressure ring is sleeved on the linkage rod and is connected and fixed to the linkage rod, a compression spring is provided on the side of the pressure ring away from the horizontal hole, the compression spring is sleeved on the linkage rod, an L-shaped plate is provided on the side of the compression spring away from the pressure ring, an end of the linkage rod close to the pressure ring passes through the L-shaped plate and the linkage rod is in sliding contact with the L-shaped plate, one end of the L-shaped plate is connected and fixed to the horizontal plate, an extrusion portion for extruding the blocking portion is formed on the linkage rod, and the end of the linkage rod away from the pressure ring extends to one side of the load-bearing beam and contacts the side of the load-bearing beam.

[0008] Specifically, one end of the linkage rod close to the compression spring is bent to form a U-shaped portion, the U-shaped portion is arranged toward the left side of the cross plate, the U-shaped portion and the linkage rod are an integrally formed structure, and the extrusion portion and the linkage rod are an integrally formed structure.

[0009] Specifically, one end of the four oblique grooves on one of the cross plates away from the U-shaped frame is provided with a first guide plate, and one end of the four guide grooves on the cross plate close to the U-shaped frame is provided with a second guide plate, the cross-sections of the first guide plate and the second guide plate are both "L"-shaped, one end of the first guide plate and one end of the second guide plate are rotatably connected to the cross plate through an axle rod, a side of the first guide plate facing away from the second guide plate and a side of the second guide plate facing away from the first guide plate are provided with a baffle rod, the lower end of the baffle rod is connected and fixed to the cross plate, a side of the first guide plate facing away from the corresponding baffle rod and a side of the second guide plate facing away from the corresponding baffle rod are both installed with a first limit sleeve, a power spring is installed in the first limit sleeve, an end of the power spring away from the first limit sleeve is provided with a second limit sleeve, the second limit sleeve is connected and fixed to the cross plate, a side surface of the first guide plate close to the oblique groove is flush with the right inner wall of the guide groove, and a side surface of the second guide plate close to the guide groove is flush with the right inner wall of the oblique groove.

[0010] Specifically, two arc plates are provided on the outside of the digital rebound tester, and the two arc plates are respectively connected and fixed to the first bent rod and the second bent rod. Semicircular rings are installed at both ends of the arc plates, and one ends of the two semicircular rings on the same side of the digital rebound tester are hinged to each other, and the other ends of the two semicircular rings on the same side of the digital rebound tester are connected to each other by bolts, and the two semicircular rings on the same side of the digital rebound tester are sleeved on the digital rebound tester.

[0011] Specifically, reinforcing ribs are installed on the back surfaces of the two arc-shaped plates, and one end of the two reinforcing ribs away from the arc-shaped plates is respectively connected and fixed to the first curved rod and the second curved rod.

[0012] Specifically, a triangular block is installed on an inner wall of the U-shaped frame close to the horizontal plate, and the width of the triangular block gradually increases upward. A wedge block is provided on one side of the triangular block, and the inclined surface of the wedge block close to the horizontal plate is in contact with the inclined surface on the triangular block. A threaded hole is provided at the bottom of the U-shaped frame, and a long screw is threadedly connected to the threaded hole. The upper end of the long screw is rotatably connected to the wedge block through a bearing.

[0013] Beneficial effects of the present invention: 1. The first bending rod and the second bending rod move along the channel formed by four guide grooves and four oblique grooves. At this time, the digital rebound hammer moves along the direction perpendicular to the load-bearing beam. Under the guidance of the oblique grooves, the digital rebound hammer moves from one marking point to the next marking point at a set distance. The inspection personnel do not need to spend energy to move the digital rebound hammer to the required position, which simplifies the operation process of moving the digital rebound hammer.

[0014] 2. When the ends of the first bent rod and the second bent rod move from the guide groove to the intersection of the guide groove and the oblique groove, the convex ring part squeezes the second guide plate, and the second guide plate rotates around its axis. At the same time, the power spring on the second guide plate is squeezed. When the convex ring part passes over the second guide plate, the power spring and the blocking rod cooperate with each other to restore the second guide plate to its original position. Under the guidance of the second guide plate, the convex ring part can be smoothly transferred from the guide groove to the oblique groove. Similarly, under the guidance of the first guide plate, the convex ring part can be smoothly moved from the oblique groove to the guide groove, thereby preventing the first bent rod and the second bent rod from moving in the opposite direction.

[0015] 3. After the support arm moves down one level, the first bent rod and the second bent rod are separated from the corresponding cross plates respectively. Under the action of the rebound force of the compression spring, the linkage rod returns to its original position. Observe whether the end of the linkage rod away from the cross plate is in contact with the side of the load-bearing beam. If there is a gap between the end of the linkage rod away from the cross plate and the side of the load-bearing beam or the end of the linkage rod close to the cross plate cannot be inserted into the corresponding oblique groove, it means that the side of the load-bearing beam is not in a vertical state, that is, the digital rebound tester and the side of the load-bearing beam are not in a vertical state, so as to remind the digital rebound tester and the side of the load-bearing beam that they are not in a vertical state.

[0016] 4. Clamp the U-shaped frame on the load-bearing beam, and then turn the long screw to move the wedge block upward. At this time, the wedge block and the triangular block squeeze and cooperate with each other, so that the U-shaped frame is restricted on the load-bearing beam, so that the U-shaped frame can be installed on load-bearing beams of different widths, expanding the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a structural schematic diagram of a shear force detection device for a building load-bearing beam of the present invention; Figure 2 A three-dimensional diagram of a shear force detection device for a building load-bearing beam according to the present invention from another viewing angle; Figure 3 for Figure 1 Enlarged view of point A in the middle; Figure 4 It is a schematic diagram of assembling a first curved rod, a second curved rod and a digital rebound tester in a shear force detection device for a building load-bearing beam of the present invention; Figure 5 It is a schematic diagram of the assembly of a linkage rod, a horizontal plate, a rectangular column and a connecting frame in a shear force detection device for a building load-bearing beam of the present invention; Figure 6 It is a schematic diagram of the assembly of a support frame, a support arm and a cross plate in a shear force detection device for a building load-bearing beam of the present invention; Figure 7 It is a schematic diagram of assembling a reset spring, a blocking part and a rectangular column in a shear force detection device for a building load-bearing beam of the present invention; Figure 8 It is a schematic diagram of the assembly of a guide sleeve, a compression spring and a linkage rod in a shear force detection device for a building load-bearing beam of the present invention; Fig. 9 It is a cross-sectional assembly schematic diagram of a wedge block, a triangular block, a long screw rod and a U-shaped frame in a shear force detection device for a building load-bearing beam of the present invention; In the figure: 1, digital rebound tester, 2, semicircular ring, 3, arc plate, 4, first bent rod, 5, linkage rod, 6, U-shaped part, 7, long screw, 8, U-shaped frame, 9, wedge block, 10, triangular block, 11, support arm, 12, rectangular column, 13, connecting frame, 14, supporting frame, 15, cross plate, 16, convex ring part, 17, second bent rod, 18, oblique groove, 19, guide groove, 20, reinforcing rib, 21, guide sleeve, 22, first guide plate, 23, power spring, 24, second limiting sleeve, 25, pressure ring, 26, compression spring, 27, L-shaped plate, 28, first limiting sleeve, 29, stop rod, 30, second guide plate, 31, inlet, 32, blocking part, 33, rectangular groove, 34, cross hole, 35, outlet, 36, reset spring, 37, rectangular cavity, 38, plugging cover, 39, extrusion part. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0019] Example 1: Please refer to Figure 1-Figure 6 The present invention provides a technical solution: a shear force detection device for a building load-bearing beam, comprising a digital rebound tester 1, a connecting frame 13 is provided on the upper side of the digital rebound tester 1, and horizontal plates 15 are installed at both ends of the connecting frame 13, and the horizontal plate 15 serves to connect the two horizontal plates 15.

[0020] One end of the cross plate 15 is provided with a U-shaped frame 8 for clamping on the load-bearing beam, and four guide grooves 19 arranged perpendicularly to the side of the load-bearing beam are provided on the upper surface of the cross plate 15, and four oblique grooves 18 for connecting two adjacent guide grooves 19 are provided on the upper surface of the cross plate 15, and the oblique grooves 18 and the guide grooves 19 are arranged alternately. An inlet 31 communicating with the rightmost guide groove 19 on the cross plate 15 is provided on the right side surface of the cross plate 15, and an outlet 35 communicating with the leftmost oblique groove 18 on the cross plate 15 is provided on the right side surface of the cross plate 15. The design of the inlet 31 and the outlet 35 facilitates the first curved rod 4 and the second curved rod 17 to install one end of the convex ring portion 16 to enter and exit the channel formed by the guide groove 19 and the oblique groove 18. A support frame 14 arranged along the length direction of the guide groove 19 is installed on the upper surface of the cross plate 15. Under the action of the support frame 14, the two parts of the cross plate 15 divided by the channel formed by the oblique groove 18, the guide groove 19, the outlet 35 and the inlet 31 remain relatively fixed.

[0021] A first bending rod 4 and a second bending rod 17 are installed on the outer surface of the digital rebound tester 1, wherein two arc plates 3 are arranged on the outer side of the digital rebound tester 1, and the two arc plates 3 are respectively connected and fixed to the first bending rod 4 and the second bending rod 17, and semicircular rings 2 are installed at both ends of the arc plate 3, and one end of the two semicircular rings 2 on the same side of the digital rebound tester 1 is hinged to each other, and the other ends of the two semicircular rings 2 on the same side of the digital rebound tester 1 are connected to each other by bolts, so that the two semicircular rings 2 on the same side of the digital rebound tester 1 are sleeved on the digital rebound tester 1, and the assembly of the arc plate 3 and the digital rebound tester 1 is completed, that is, the disassembly of the first bending rod 4, the second bending rod 17 and the digital rebound tester 1 is facilitated, and reinforcing ribs 20 are installed on the back sides of the two arc plates 3, so that the ends of the two reinforcing ribs 20 away from the arc plate 3 are respectively connected and fixed to the first bending rod 4 and the second bending rod 17, so as to improve the mechanical strength of the connection between the first bending rod 4, the second bending rod 17 and the corresponding arc plate 3.

[0022] One end of the first curved rod 4 away from the digital rebound tester 1 and one end of the second curved rod 17 away from the digital rebound tester 1 are inserted into the channel formed by the corresponding guide groove 19 and the oblique groove 18. Two convex ring parts 16 are installed on the upper side of the horizontal plate 15 and the lower side of the horizontal plate 15, respectively, so that the ends of the first curved rod 4 and the second curved rod 17 away from the digital rebound tester 1 are respectively inserted into two channels formed by four guide grooves 19 and four oblique grooves 18, wherein the guide groove 19 is arranged perpendicular to the load-bearing beam. When one end of the first curved rod 4 and the second curved rod 17 moves along the guide groove 19, under the restriction of the convex ring portion 16, the first curved rod 4 and the second curved rod 17 move along the channel formed by the four guide grooves 19 and the four oblique grooves 18. At this time, the digital rebound hammer 1 moves along the direction perpendicular to the load-bearing beam. Under the guidance of the oblique groove 18, the digital rebound hammer 1 moves from one marking point to the next marking point at a set distance. The detection personnel do not need to spend energy to move the digital rebound hammer 1 to the desired position, thereby simplifying the operation process of moving the digital rebound hammer 1.

[0023] When the inspector climbs up with the help of a ladder and uses the digital rebound tester 1 to inspect the load-bearing beam at a high place, the inspector holds the digital rebound tester 1 in his hand. Because the structure formed by the U-shaped frame 8, the cross plate 15 and other components maintains a connection relationship with the load-bearing beam, when the first bent rod 4 and the second bent rod 17 are in the channel formed by the corresponding guide groove 19 and the oblique groove 18, the digital rebound tester 1, the cross plate 15 and the U-shaped frame 8 and other components provide the inspector with a gripping point when working at a high place, avoiding the embarrassment of not being able to find the safety belt hanging point, thereby improving safety.

[0024] The four oblique grooves 18 on a horizontal plate 15 are each provided with a first guide plate 22 at one end away from the U-shaped frame 8, and the four guide grooves 19 on a horizontal plate 15 are each provided with a second guide plate 30 at one end close to the U-shaped frame. The cross sections of the first guide plate 22 and the second guide plate 30 are both "L"-shaped. One end of the first guide plate 22 and one end of the second guide plate 30 are both rotatably connected to the horizontal plate 15 through an axle rod. A side of the first guide plate 22 away from the second guide plate 30 and a side of the second guide plate 30 away from the first guide plate 22 are both provided with a stopper 29, and the lower end of the stopper 29 is fixedly connected to the horizontal plate 15 A first limiting sleeve 28 is installed on one side of the first guide plate 22 facing away from the corresponding blocking rod 29 and a side of the second guide plate 30 facing away from the corresponding blocking rod 29. A power spring 23 is installed in the first limiting sleeve 28. An end of the power spring 23 away from the first limiting sleeve 28 is provided with a second limiting sleeve 24. The second limiting sleeve 24 is connected and fixed to the cross plate 15. The first limiting sleeve 28 and the second limiting sleeve 24 work together to improve the stability of the installation of the power spring 23. The power spring 23 cooperates with the blocking rod 29 to keep the relative positions of the first guide plate 22 and the second guide plate 30 unchanged.

[0025] The side surface of the first guide plate 22 close to the oblique groove 18 is flush with the right inner wall of the guide groove 19, and the side surface of the second guide plate 30 close to the guide groove 19 is flush with the right inner wall of the oblique groove 18. When the ends of the first curved rod 4 and the second curved rod 17 move from the guide groove 19 to the intersection of the guide groove 19 and the oblique groove 18, the convex ring portion 16 squeezes the second guide plate 30, and the second guide plate 30 rotates around its axis. At the same time, the power spring 23 on the second guide plate 30 is squeezed. When the convex ring portion 16 passes over the second guide plate 30, the power spring 23 and the blocking rod 29 cooperate with each other to restore the second guide plate 30 to its original position. Under the guidance of the second guide plate 30, the convex ring portion 16 can be smoothly transferred from the guide groove 19 to the oblique groove 18. Similarly, under the guidance of the first guide plate 22, the convex ring portion 16 can be smoothly moved from the oblique groove 18 to the guide groove 19, preventing the first curved rod 4 and the second curved rod 17 from moving in the opposite direction.

[0026] Embodiment 2: Since the measurement area of ​​each load-bearing beam should be evenly struck at sixteen points, according to the method of using the digital rebound tester 1, the sixteen points are arranged in the state of four marking points in the horizontal direction and four marking points in the vertical direction. After the four points at the same level are detected, the cross plate 15 needs to be moved down to another level for detection. The support arm 11 is directly connected to the U-shaped frame 8, which will affect the adjustment of the vertical position of the cross plate 15. The relative position of the cross plate 15 and the U-shaped frame 8 can be adjusted by driving methods such as electric push rods. During the pouring process of the load-bearing beam, the side of the load-bearing beam is not in a vertical state due to the quality of the template support. After the cross plate 15 is moved down by driving methods such as electric push rods, the situation that the side of the load-bearing beam is not in a vertical state is not obvious, and the situation that the side of the load-bearing beam is not in a vertical state is not easy to be directly observed. Therefore, the digital rebound tester 1 after being moved down is not in a vertical state with the load-bearing beam. At this time, the inspection personnel will cause a large error in the inspection data due to blind inspection due to failure to timely learn the changes in the side of the load-bearing beam.

[0027] To solve the above problems, please refer to Figure 1-Figure 8The ends of the two horizontal plates 15 close to the U-shaped frame 8 are both equipped with support arms 11, and the ends of the upper surfaces of the support arms 11 away from the horizontal plates 15 are provided with rectangular grooves 33, and rectangular columns 12 are inserted in the rectangular grooves 33. The lower ends of the rectangular columns 12 are connected and fixed to the U-shaped frame 8, and there is a gap between the rectangular columns 12 and the U-shaped frame 8. Four rectangular cavities 37 are equidistantly provided from top to bottom on the side of the rectangular column 12 facing the U-shaped frame 8, and a blocking portion 3 for limiting the relative position of the support arms 11 and the rectangular columns 12 is inserted in the rectangular cavity 37 on the side close to the U-shaped frame 8. 2. Two return springs 36 are installed at one end of the blocking portion 32 in the rectangular cavity 37. One end of the return spring 36 away from the blocking portion 32 is connected to a blocking cover 38. The blocking cover 38 is installed on the side of the rectangular cavity 37 away from the blocking portion 32. Under the support of the return spring 36, one end of the blocking portion 32 extends to the outside of the rectangular cavity 37. Therefore, after the support arm 11 contacts the blocking portion 32, the structure formed by the support arm 11 and the cross plate 15 will not move downward under the obstruction of the blocking portion 32, so that the cross plate 15 is kept at a level.

[0028] A guide sleeve 21 is installed at the lower left corner of the two horizontal plates 15, and a linkage rod 5 is inserted in the guide sleeve 21. A horizontal hole 34 is opened on the side of the two horizontal plates 15 away from the U-shaped frame 8. The horizontal hole 34 is connected to the leftmost oblique groove 18 on the horizontal plate 15. One end of the linkage rod 5 passes through the horizontal hole 34 and extends into the corresponding oblique groove 18. A pressure ring 25 is provided on the side of the horizontal hole 34 away from the oblique groove 18. The pressure ring 25 is sleeved on the linkage rod 5 and connected and fixed to the linkage rod 5. A compression spring 26 is provided on the side of the pressure ring 25 away from the horizontal hole 34 The compression spring 26 is sleeved on the linkage rod 5, and an L-shaped plate 27 is provided on the side of the compression spring 26 facing away from the pressure ring 25. The end of the linkage rod 5 close to the pressure ring 25 passes through the L-shaped plate 27 and the linkage rod 5 is in sliding contact with the L-shaped plate 27. One end of the L-shaped plate 27 is connected and fixed to the cross plate 15. Under the action of the compression spring 26, the pressure ring 25 is fitted with the cross plate 15. At this time, one end of the linkage rod 5 will extend into the corresponding oblique groove 18, and the horizontal hole 34 interacts with the guide sleeve 21 to limit the moving trajectory of the linkage rod 5.

[0029] An extrusion portion 39 for extruding the blocking portion 32 is formed on the linkage rod 5, and the extrusion portion 39 and the linkage rod 5 are an integrally formed structure. One end of the linkage rod 5 away from the pressure ring 25 extends to one side of the load-bearing beam and contacts the side of the load-bearing beam. One end of the linkage rod 5 close to the compression spring 26 is bent to form a U-shaped portion 6, and the U-shaped portion 6 is arranged toward the left side of the cross plate 15. The U-shaped portion 6 and the linkage rod 5 are an integrally formed structure, so that the U-shaped portion 6 is formed on the linkage rod 5 to prevent the linkage rod 5 from affecting the movement of the first bent rod 4 and the second bent rod 17. The first bent rod 4 and the second bent rod 17 will squeeze the corresponding linkage rod 5 after moving to the oblique groove 18 on the leftmost side of the two cross plates 15 respectively. After the linkage rod 5 is squeezed, the pressure ring 25 and the L-shaped plate 27 interact with each other to squeeze the compression spring 26. At this time, the extrusion portion 39 on the linkage rod 5 will squeeze the blocking portion 32, and the blocking portion 32 and the blocking cover 38 together At the same time, the return spring 36 is squeezed to shrink the blocking part 32 into the rectangular cavity 37, so that the support arm 11 can move downward, which is convenient for the cross plate 15 to move from a mark point on the horizontal level of the load-bearing beam to the level of the next mark point. After the support arm 11 moves down one level, the first bent rod 4 and the second bent rod 17 are separated from the corresponding cross plate 15 respectively. Under the action of the rebound force of the compression spring 26, the linkage rod 5 returns to its original position, and observe whether the end of the linkage rod 5 away from the cross plate 15 is in contact with the side of the load-bearing beam. If there is a gap between the end of the linkage rod 5 away from the cross plate 15 and the side of the load-bearing beam or the end of the linkage rod 5 close to the cross plate 15 cannot be inserted into the corresponding oblique groove 18, it means that the side of the load-bearing beam is not in a vertical state, that is, there is a situation where the digital rebound tester 1 and the side of the load-bearing beam are not in a vertical state, thereby realizing a reminder that the digital rebound tester 1 and the side of the load-bearing beam are not in a vertical state.

[0030] Embodiment 3: Since the widths of building load-bearing beams are different, a fixed-size U-shaped frame 8 is used to restrict the cross plate 15 and the like on the load-bearing beams. This can only be applied to building load-bearing beams of a single size and is difficult to be applied to building load-bearing beams of different widths, thus affecting the use of the digital rebound tester 1 on building load-bearing beams of different widths.

[0031] To solve the above problems, please refer to Figure 1 , Figure 2 and Fig. 9 A triangular block 10 is installed on an inner wall of the U-shaped frame 8 near the horizontal plate 15, and the width of the triangular block 10 gradually increases upward. A wedge block 9 is provided on one side of the triangular block 10, and the inclined surface of the wedge block 9 near the horizontal plate 15 is fitted with the inclined surface on the triangular block 10. A threaded hole is provided at the bottom of the U-shaped frame 8, and a long screw 7 is threadedly connected in the threaded hole. The upper end of the long screw 7 is rotatably connected to the wedge block 9 through a bearing, and the U-shaped frame 8 is clamped on the load-bearing beam, and then the long screw 7 is screwed to move the wedge block 9 upward. At this time, the wedge block 9 and the triangular block 10 are squeezed and matched with each other, so that the U-shaped frame 8 is restricted on the load-bearing beam, so that the U-shaped frame 8 can be installed on load-bearing beams of different widths, thereby expanding the scope of application.

[0032] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A shear force detection device for a building load-bearing beam, comprising a digital rebound tester (1), characterized in that: A connecting frame (13) is provided on the upper side of the digital rebound tester (1), and a transverse plate (15) is installed at both ends of the connecting frame (13). A U-shaped frame (8) for clamping on the load-bearing beam is provided at one end of the transverse plate (15). Four guide grooves (19) arranged perpendicularly to the side of the load-bearing beam are provided on the upper surface of the transverse plate (15). Four oblique grooves (18) for connecting two adjacent guide grooves (19) are provided on the upper surface of the transverse plate (15). The oblique grooves (18) and the guide grooves (19) are arranged alternately. An inlet (31) communicating with the rightmost guide groove (19) on the transverse plate (15) is provided on the right side surface of the transverse plate (15). The upper surface of the horizontal plate (15) is provided with a support frame (14) arranged along the length direction of the guide groove (19); the outer surface of the digital rebound tester (1) is provided with a first bent rod (4) and a second bent rod (17); one end of the first bent rod (4) away from the digital rebound tester (1) and one end of the second bent rod (17) away from the digital rebound tester (1) are inserted into a channel formed by the corresponding guide groove (19) and the oblique groove (18); one end of the first bent rod (4) away from the digital rebound tester (1) and one end of the second bent rod (17) away from the digital rebound tester (1) are provided with two convex ring parts (16) respectively located on the upper side of the horizontal plate (15) and the lower side of the horizontal plate (15).

2. A shear force detection device for a building load-bearing beam according to claim 1, characterized in that: The ends of the two transverse plates (15) close to the U-shaped frame (8) are both provided with supporting arms (11); the ends of the upper surfaces of the supporting arms (11) away from the transverse plates (15) are provided with rectangular grooves (33); a rectangular column (12) is inserted into the rectangular grooves (33); the lower ends of the rectangular columns (12) are connected and fixed to the U-shaped frame (8); a gap exists between the rectangular columns (12) and the U-shaped frame (8); four rectangular cavities (37) are equidistantly provided from top to bottom on the side of the rectangular columns (12) facing the U-shaped frame (8); a rectangular cavity (37) is inserted into the side of the rectangular cavity (37) close to the U-shaped frame (8); A blocking portion (32) is provided for limiting the relative position of the support arm (11) and the rectangular column (12), one end of the blocking portion (32) extending to the outside of the rectangular cavity (37), two return springs (36) being installed at one end of the blocking portion (32) in the rectangular cavity (37), a blocking cover (38) being connected to one end of the return spring (36) away from the blocking portion (32), the blocking cover (38) being installed at one side of the rectangular cavity (37) away from the blocking portion (32), and an extrusion piece for locking the blocking portion (32) in the rectangular cavity (37) being installed on both of the two transverse plates (15).

3. A shear force detection device for a building load-bearing beam according to claim 2, characterized in that: The extrusion member comprises a guide sleeve (21), the lower left corners of the two transverse plates (15) are both provided with a guide sleeve (21), a linkage rod (5) is inserted in the guide sleeve (21), a transverse hole (34) is provided on a side of the two transverse plates (15) facing away from the U-shaped frame (8), the transverse hole (34) is communicated with the leftmost oblique groove (18) on the transverse plate (15), one end of the linkage rod (5) passes through the transverse hole (34) and extends into the corresponding oblique groove (18), a pressure ring (25) is provided on a side of the transverse hole (34) away from the oblique groove (18), the pressure ring (25) is sleeved on the linkage rod (5) and is connected and fixed to the linkage rod (5), the A compression spring (26) is provided on the side of the pressure ring (25) facing away from the transverse hole (34), and the compression spring (26) is sleeved on the linkage rod (5). An L-shaped plate (27) is provided on the side of the compression spring (26) facing away from the pressure ring (25). One end of the linkage rod (5) close to the pressure ring (25) passes through the L-shaped plate (27) and the linkage rod (5) is in sliding contact with the L-shaped plate (27). One end of the L-shaped plate (27) is connected and fixed to the transverse plate (15). An extrusion portion (39) for extruding the blocking portion (32) is formed on the linkage rod (5). One end of the linkage rod (5) away from the pressure ring (25) extends to one side of the load-bearing beam and contacts the side surface of the load-bearing beam.

4. A shear force detection device for a building load-bearing beam according to claim 3, characterized in that: One end of the linkage rod (5) close to the compression spring (26) is bent to form a U-shaped portion (6), the U-shaped portion (6) is arranged towards the left side of the transverse plate (15), the U-shaped portion (6) and the linkage rod (5) are an integrally formed structure, and the extrusion portion (39) and the linkage rod (5) are an integrally formed structure.

5. A shear force detection device for a building load-bearing beam according to claim 1, characterized in that: A first guide plate (22) is provided at one end of the four oblique grooves (18) on the transverse plate (15) away from the U-shaped frame (8); a second guide plate (30) is provided at one end of the four guide grooves (19) on the transverse plate (15) close to the U-shaped frame; the cross-sections of the first guide plate (22) and the second guide plate (30) are both L-shaped; one end of the first guide plate (22) and one end of the second guide plate (30) are rotatably connected to the transverse plate (15) via a shaft; a stopper (29) is provided on a side of the first guide plate (22) facing away from the second guide plate (30) and a side of the second guide plate (30) facing away from the first guide plate (22); the lower end of the stopper (29) is connected to the transverse plate ( 15) are connected and fixed, a first limiting sleeve (28) is installed on a side of the first guide plate (22) facing away from the corresponding blocking rod (29) and a side of the second guide plate (30) facing away from the corresponding blocking rod (29), a power spring (23) is installed in the first limiting sleeve (28), and a second limiting sleeve (24) is sleeved on an end of the power spring (23) away from the first limiting sleeve (28), and the second limiting sleeve (24) is connected and fixed to the cross plate (15), a side of the first guide plate (22) close to the oblique groove (18) is flush with the right inner wall of the guide groove (19), and a side of the second guide plate (30) close to the guide groove (19) is flush with the right inner wall of the oblique groove (18).

6. A shear force detection device for a building load-bearing beam according to claim 1, characterized in that: Two arc plates (3) are provided on the outside of the digital rebound tester (1), and the two arc plates (3) are respectively connected and fixed to the first curved rod (4) and the second curved rod (17). Semicircular rings (2) are installed at both ends of the arc plates (3), and one end of the two semicircular rings (2) on the same side of the digital rebound tester (1) is hinged to each other, and the other ends of the two semicircular rings (2) on the same side of the digital rebound tester (1) are connected to each other by bolts, and the two semicircular rings (2) on the same side of the digital rebound tester (1) are sleeved on the digital rebound tester (1).

7. A shear force detection device for a building load-bearing beam according to claim 6, characterized in that: Reinforcing ribs (20) are installed on the opposite sides of the two arc-shaped plates (3), and the ends of the two reinforcing ribs (20) away from the arc-shaped plates (3) are respectively connected and fixed to the first curved rod (4) and the second curved rod (17).

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