Steel structure bolt torque detection device and detection method

Abstract

The invention provides a steel structure bolt torque detection device and detection method, and relates to the technical field of steel structure detection. The detection device comprises a digital display type handheld torque wrench, a coaxial positioning mechanism is arranged on a sleeve of the digital display type handheld torque wrench and used for enabling the sleeve and the head of a bolt to be kept coaxial, the coaxial positioning mechanism comprises an inner threaded sleeve, a horn-shaped cylinder, six clamping blocks and six sliding rods, the inner threaded sleeve is arranged on the outer wall of the sleeve in a threaded and sleeving mode, and the horn-shaped cylinder is arranged on the outer wall of the sleeve. The horn is arranged at the bottom of the internal thread sleeve; the detection method comprises the steps that T3, the sleeve is aligned with the bolt head, the rotatable hand lever is rotated to drive the internal thread sleeve and the horn cylinder to move downwards till the clamping block is attached to the prism face of the bolt head, and the sleeve and the bolt are coaxial. The steel structure bolt torque detection device provided by the invention has the advantages that the sleeve and the bolt can be accurately and coaxially positioned, the corrosion layer of the bolt head can be pretreated, and the stability of rust cleaning operation is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental monitoring, and in particular to a steel structure bolt torque detection device and a detection method. Background Art

[0002] In steel structure engineering, bolt connections are a core component in ensuring structural stability. Bolt torque values ​​are directly related to the load-bearing capacity and safety of steel structures, so regular bolt torque testing is essential. Currently, digital handheld torque wrenches are widely used in the industry for this testing. These wrenches insert a sleeve into the bolt head, apply torque, and utilize a built-in sensor to detect torque values. Their ease of use has been recognized.

[0003] When installing bolts on steel structures, or during torque testing after installation, the edges of the bolt heads will show varying degrees of wear, which will increase the fit clearance between the bolt head and the sleeve. In addition, steel structure bolts are exposed to outdoor or industrial environments for a long time, and the bolt heads are prone to rust, resulting in a virtual connection between the edges and the sleeve. When the operator uses a wrench to insert the sleeve into the bolt head, the axial deviation between the sleeve and the bolt will be relatively large, which will cause additional radial force during the torque transmission process, causing sensor detection data deviation. The sleeve of the existing digital handheld torque wrench only adapts to the bolt head size through the inner diameter, and lacks active positioning and adjustment function. When the bolt occurs in the above situation, it is unable to solve the problem of excessive coaxial deviation between the sleeve and the bolt. The resulting detection error may pose a structural safety hazard.

[0004] Therefore, it is necessary to provide a steel structure bolt torque detection device and detection method to solve the above technical problems. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide a steel structure bolt torque detection device and detection method that can achieve precise coaxial positioning of the sleeve and the bolt, pre-treat the rust layer of the bolt head, and ensure the stability of the rust cleaning operation.

[0006] To solve the above technical problems, the present invention provides a steel structure bolt torque detection device, comprising a digital handheld torque wrench, the digital handheld torque wrench being provided with a sleeve and a handle, the sleeve being provided with a coaxial positioning mechanism for keeping the sleeve and the bolt head coaxial; The coaxial positioning mechanism includes an internal threaded sleeve, a horn, six clamping blocks and six sliding rods. The internal threaded sleeve is threadedly sleeved on the outer wall of the sleeve, the horn is arranged at the bottom of the internal threaded sleeve, and the horn and the internal threaded sleeve are integrally formed. Mounting grooves are provided on the six inner walls of the sleeve, and the six clamping blocks are slidably installed in the corresponding mounting grooves respectively. The six sliding rods are slidably installed on the sleeve, and the ends of the six sliding rods close to each other are fixedly connected to the corresponding clamping blocks. The end of the sliding rod away from the clamping block is movably inlaid with a ball, and the ball contacts the inner wall of the horn. A ring is fixedly sleeved on the outer wall of the sliding rod, and a first return spring is sleeved on the sliding rod, one end of the first return spring contacts the ring, and the other end contacts the sleeve.

[0007] Furthermore, two rotatable handles are rotatably mounted on the outer wall of the internal threaded sleeve, and two magnet blocks are fixedly mounted on the outer wall of the horn, and the two magnet blocks are respectively attracted to the corresponding rotatable handles.

[0008] Furthermore, a rust cleaning mechanism is installed at one end of the handle away from the sleeve for cleaning the rust layer on the bolt head; The rust cleaning mechanism includes a fixing ring, a turntable, a hexagonal fixing rod, a hexagonal sleeve, multiple moving rods, multiple polishing rods and multiple push-pull rods. The fixing ring is installed on the handle, the turntable is rotatably installed in the fixing ring, the hexagonal fixing rod is fixedly installed at the central position of the top of the turntable, the hexagonal sleeve is slidably sleeved on the hexagonal fixing rod, multiple moving rods are all penetrated and slidably installed on the turntable, and multiple moving rods are rotationally symmetrically distributed, multiple polishing rods are respectively installed on the bottom ends of multiple moving rods, multiple push-pull rods are respectively rotatably installed on the top ends of multiple moving rods, and the top ends of multiple push-pull rods are rotatably connected to the hexagonal sleeve. A second reset spring is sleeved on the hexagonal fixing rod, the top end of the second reset spring is in contact with the hexagonal sleeve, and the bottom end is in contact with the turntable.

[0009] Preferably, a plurality of long slides are provided on the turntable, and a plurality of the moving rods are located in the corresponding long slides. A limiting slide is fixedly installed in the long slide, and the limiting slide passes through the moving rod and is slidably connected to the moving rod. A third return spring is sleeved on the limiting slide, and one end of the third return spring contacts the moving rod, and the other end contacts the inner wall of one side of the corresponding long slide.

[0010] Preferably, a square plug is fixedly mounted on the fixing ring, a square slot is formed on the end of the handle away from the sleeve, the end of the square plug away from the fixing ring extends into the square slot, and a quick release part is mounted on the top of the square plug, which can fix the square plug after it is inserted into the square slot to prevent it from slipping; The quick-release part includes an L-shaped fixing block, an insertion rod, an end plate and a retaining spring. The L-shaped fixing block is fixedly installed on the top of the square plug, and the insertion rod is slidably installed on the top of the L-shaped fixing block. A first round socket is provided on the top of the square plug, and an avoidance round hole is provided on the handle. The bottom end of the insertion rod passes through the avoidance round hole and extends into the first round socket. The end plate is fixedly installed on the top end of the insertion rod, and the retaining spring is sleeved on the insertion rod. The top end of the retaining spring is fixedly connected to the end plate, and the bottom end is fixedly connected to the L-shaped fixing block.

[0011] Preferably, the grinding rod is composed of a diamond abrasive layer and a core rod, and the diamond abrasive layer is bonded and fixed to the outer wall of the core rod.

[0012] Preferably, a rotating rod is rotatably installed on the bottom end of the movable rod, a mounting sleeve is fixedly installed on the bottom end of the rotating rod, the core rod is detachably fixedly connected to the mounting sleeve, a worm gear is provided on the fixed sleeve on the outer wall of the rotating rod, two fixed arms are fixedly installed on the movable rod, the same worm is rotatably installed on the two fixed arms, and the worm is meshed with the worm gear.

[0013] Furthermore, an auxiliary support member is installed at the bottom position of the handle away from the sleeve, which is used to provide auxiliary support for the digital handheld torque wrench to maintain its stability when cleaning the rust layer on the bolt head; The auxiliary support member includes a Z-shaped rod, a sleeve and a pad. The sleeve is threadedly sleeved on the Z-shaped rod. The top end of the Z-shaped rod is detachably fixedly connected to the handle. The pad is fixedly installed on the bottom end of the sleeve.

[0014] Furthermore, a rubber pad is fixedly installed on the bottom of the pad.

[0015] To solve the above problems, the present invention further provides a method for detecting the torque of a steel structure bolt, comprising the following steps: T1: Install the socket on the drive head of the digital handheld torque wrench to ensure that the socket is firmly connected and not loose; T2: Check the digital handheld torque wrench to ensure that the digital display function is normal; T3: Align the sleeve with the bolt head, turn the rotatable handle to move the internal thread sleeve and the horn downward until the clamping block fits against the edge of the bolt head, making the sleeve coaxial with the bolt; T4: Grip the handle and rotate the sleeve in the direction of bolt tightening. When the bolt overcomes the pre-tightening force and starts to rotate in the tightening direction, read the locked torque peak on the digital display. T5: Rotate the rotatable handle in the opposite direction to move the horn upwards, separating the clamp from the edge of the bolt head. Then, hold the handle to remove the sleeve from the bolt head to complete the test.

[0016] Compared with related technologies, the steel structure bolt torque detection device and detection method provided by the present invention have the following beneficial effects: The present invention provides a torque detection device for bolts in steel structures. By providing a coaxial positioning mechanism, a precise coaxial alignment function of a sleeve and a bolt is achieved. The threaded connection between the internal threaded sleeve of the coaxial positioning mechanism and the sleeve, in conjunction with the opening and contraction characteristics of the horn, drives the clamping block to move radially synchronously and fit the bolt head face. The six-way symmetrical clamping force is utilized to allow the sleeve to adaptively adjust its position, effectively avoiding the situation where a large torque transmission error caused by a large deviation between the bolt and sleeve axes is excessive, thereby facilitating improved torque detection accuracy. By setting up a rust cleaning mechanism, the rust layer on the bolt head can be pre-treated and cleaned. The rust cleaning mechanism uses a combination of a square plug and a quick-release part, which can be quickly disassembled and installed on the handle of the digital handheld torque wrench. By pressing the hexagonal socket to control the expansion and contraction of the grinding rod, grinding preparation can be completed quickly. Rotating the handwheel can drive the grinding rod to rotate and remove rust, eliminating the interference of rust on coaxial positioning and torque transmission. In addition, the combination of the worm and worm wheel can adjust the angle of the grinding rod, adjust the unused abrasive area to face the bolt head, so that all areas of the grinding rod can be effectively utilized, which is conducive to extending the service life of the grinding rod and reducing the number of consumable replacements. By setting up auxiliary support parts, a stable support function is achieved during rust cleaning operations. The rotating sleeve of the auxiliary support part can adjust the height, so that the pad contacts the steel structure to form a fulcrum, and constitutes a two-point support with the handle grip, which can effectively disperse the reverse impact force during grinding, reduce hand shaking to ensure uniform rust cleaning, and reduce grip fatigue; the Z-shaped rod avoids interference with the grinding area, and the rubber pad plays an anti-slip and buffering role, allowing rust cleaning operations to be carried out stably and efficiently in a variety of environments.

[0017] The present invention provides a method for detecting the torque of a steel structure bolt, which can enable the sleeve of a digital handheld torque wrench to be coaxially positioned with the bolt, thereby facilitating improved accuracy of torque detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the steel structure bolt torque detection device provided by the present invention; Figure 2 for Figure 1 A schematic structural diagram of the sleeve and the coaxial positioning mechanism shown; Figure 3 for Figure 2 A top view of the sleeve is shown; Figure 4 for Figure 3 The cross-sectional structural diagram of the AA portion shown; Figure 5 for Figure 2 An exploded schematic diagram of the coaxial positioning mechanism shown; Figure 6 for Figure 1 A schematic diagram of the structure of the rust cleaning mechanism and the auxiliary support member in a connected state with the handle; Figure 7 for Figure 6 A schematic diagram of the structure of the rust cleaning mechanism and the auxiliary support member in a separated state from the handle; Figure 8 for Figure 7 The structural diagram of the rust cleaning mechanism shown in FIG. Figure 9 for Figure 8 A bottom view of the rust cleaning mechanism shown; Figure 10 for Figure 8 Schematic diagram of the connection structure between the grinding rod and the moving rod shown; Figure 11 for Figure 10 The schematic diagram of the structure of the grinding rod and the mounting sleeve shown is in a separated state; Figure 12 for Figure 8 The schematic diagram of the structure of the quick release parts shown; Figure 13 for Figure 7 The structural schematic diagram of the auxiliary support member is shown.

[0019] Numbers in the figure: 1. Digital handheld torque wrench; 11. Socket; 12. Handle; 2. Coaxial positioning mechanism; 21. Internal threaded sleeve; 22. Horn; 23. Clamping block; 24. Sliding rod; 25. Ball bearing; 26. Ferrule; 27. First return spring; 28. Rotatable handle; 3. Rust cleaning mechanism; 31. Fixing ring; 32. Turntable; 33. Square plug; 34. Hexagonal fixing rod; 35. Hexagonal socket; 36. Handwheel; 37. Moving rod; 38. Grinding rod; 39. Push-pull rod; 310. Second return spring; 311, limit slide; 312, third return spring; 313, quick release; 314, rotating rod; 315, mounting sleeve; 316, worm gear; 317, fixed arm; 318, worm; 319, locking screw; 320, locking rod; 3131, L-shaped fixing block; 3132, insert rod; 3133, end plate; 3134, retaining spring; 3135, pull ring; 4, auxiliary support; 41, Z-shaped rod; 42, sleeve; 43, pad; 44, hexagonal plug. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] First embodiment Please refer to Figures 1-13 In a first embodiment of the present invention, a device for detecting torque of a steel structure bolt is provided, comprising: a digital handheld torque wrench 1. The digital handheld torque wrench 1 adopts the conventional design of digital handheld torque wrenches in the prior art. The digital handheld torque wrench 1 is provided with a sleeve 11 and a handle 12. Unlike the prior art, the sleeve 11 of the digital handheld torque wrench 1 is provided with a coaxial positioning mechanism 2 for maintaining the sleeve 11 coaxial with the bolt head; In this embodiment, the coaxial positioning mechanism 2 specifically includes an internal threaded sleeve 21, a horn 22, six clamping blocks 23 and six sliding rods 24. The internal threaded sleeve 21 is threadedly sleeved on the outer wall of the sleeve 11. The outer wall of the sleeve 11 is provided with an external thread, and the external thread is screwed with the internal thread of the internal threaded sleeve 21. The horn 22 is arranged at the bottom of the internal threaded sleeve 21, and the horn 22 and the internal threaded sleeve 21 are integrally formed. The inner walls of the six sides of the sleeve 11 are provided with mounting grooves, and the six clamping blocks 23 are respectively slidably installed in the corresponding mounting grooves. The six sliding rods 24 are all slidably installed on the sleeve 11. On the top, the ends of the six sliding rods 24 close to each other are fixedly connected to the corresponding clamping blocks 23, and the ends of the sliding rods 24 away from the clamping blocks 23 are movably inlaid with balls 25. The balls 25 contact the inner wall of the horn 22. In the process of the horn 22 moving downward, since its opening gradually shrinks from bottom to top, the six sliding rods 24 can be pushed by the balls 25 to move toward the axis of the sleeve 11 at the same time. The sliding rods 24 drive the clamping blocks 23 to move, so that the six clamping blocks 23 can respectively fit with the six edges of the bolt head. Due to the initial circumferential positions of the six clamping blocks 23 The six edges of the bolt head are pre-aligned, and the synchronous feed along the radial direction of the sleeve 11 is always maintained during the movement. The bolt cannot be displaced because it is fixed on the steel structure. When the clamping block 23 is radially clamped, it will drive the sleeve 11 to adaptively adjust its position through the six-way symmetrical force, so that the axis of the bolt and the axis of the sleeve 11 automatically coincide with each other, realizing the coaxial alignment of the two. There is rolling friction between the ball 25 and the horn 22, which can significantly reduce the relative movement resistance between the horn 22 and the sliding rod 24 during the downward process, ensuring that the radial feed action of the sliding rod 24 is smoother. The response is more sensitive. A ring 26 is fixed on the outer wall of the sliding rod 24, and a first return spring 27 is sleeved on the sliding rod 24. One end of the first return spring 27 is in contact with the ring 26, and the other end is in contact with the sleeve 11. When the sliding rod 24 moves into the sleeve 11, the first return spring 27 is compressed and stores elastic potential energy. In the process of the horn 22 moving upward, the squeezing force on the ball 25 gradually disappears, and the elastic potential energy stored in the first return spring 27 is gradually released, driving the sliding rod 24 to move outside the horn 22, and finally driving the clamping block 23 to return to its initial state.

[0022] In this embodiment, two rotatable hand levers 28 are rotatably mounted on the outer wall of the internal threaded sleeve 21. The provision of the two rotatable hand levers 28 facilitates the operator to rotate the internal threaded sleeve 21. Two magnet blocks are fixedly mounted on the outer wall of the horn 22. The two magnet blocks are respectively attracted to the corresponding rotatable hand levers 28. When not in operation, the rotatable hand levers 28 are adsorbed and fixed by the magnet blocks.

[0023] In this embodiment, a rust cleaning mechanism 3 is further installed at the end of the handle 12 away from the sleeve 11, which is used to pre-clean the rust layer on the bolt head before torque detection, eliminate interference with coaxial positioning accuracy, and also avoid the rust layer from affecting the stability of torque transmission. The rust cleaning mechanism 3 specifically includes a fixing ring 31, a turntable 32, a hexagonal fixing rod 34, a hexagonal sleeve 35, a plurality of moving rods 37, a plurality of grinding rods 38 and a plurality of push-pull rods 39. The fixing ring 31 is installed on the handle 12, the turntable 32 is rotatably installed in the fixing ring 31, the hexagonal fixing rod 34 is fixedly installed at the center position of the top of the turntable 32, the hexagonal sleeve 35 is slidably sleeved on the hexagonal fixing rod 34, and the top of the hexagonal sleeve 35 is fixedly installed with a handwheel 3 6. It is convenient for the operator to rotate the turntable 32. Multiple moving rods 37 are all penetrated and slidably installed on the turntable 32. More specifically, multiple long sliding openings are opened on the turntable 32. Multiple moving rods 37 are all located in the corresponding long sliding openings. A limited sliding rod 311 is fixedly installed in the long sliding opening. The limited sliding rod 311 penetrates the moving rod 37 and is slidably connected to the moving rod 37. The multiple moving rods 37 are rotationally symmetrically distributed. Multiple grinding rods 38 are respectively mounted on the bottom ends of the multiple moving rods 37. Multiple push-pull rods 39 are respectively rotatably mounted on the top ends of the multiple moving rods 37. The top ends of the multiple push-pull rods 39 are rotatably connected to the hexagonal sleeves 35. The hexagonal fixed rod 34 is provided with a second return spring 310. The second return spring 31 The top of 0 contacts with the hexagonal sleeve 35, and the bottom end contacts with the turntable 32. A third return spring 312 is provided on the limiting slide bar 311. One end of the third return spring 312 contacts with the moving rod 37, and the other end contacts with the inner wall of one side of the corresponding long slide. In the process of pressing the hexagonal sleeve 35 downward, it will slide downward axially along the hexagonal fixed rod 34 and compress the second return spring 310. The downward movement of the hexagonal sleeve 35 will be converted into a radial thrust on the moving rod 37 through the push-pull rod 39, so that multiple moving rods 37 slide synchronously outward along the long slide, thereby driving the grinding rod 38 at the bottom end to expand outward synchronously. In this process, the third return spring 312 will also be compressed, and this state will be maintained to hold multiple grinding rods 38 is sleeved on the outer periphery of the bolt head, and then the hexagonal sleeve 35 is loosened. The second return spring 310 releases elastic potential energy, pushing the hexagonal sleeve 35 to return axially upward along the hexagonal fixing rod 34, and pulling the moving rod 37 to slide inward along the long sliding mouth through the push-pull rod 39. At the same time, the third return spring 312 releases energy synchronously, assisting the moving rod 37 to return inward, so that the grinding rod 38 is synchronously retracted and reset inward. The combined force of the two sets of springs makes the grinding rod 38 fit tightly against the outer wall of the bolt head, forming a flexible clamping state, which not only ensures that the contact pressure can be ground, but also avoids excessive extrusion and damage to the bolt head body. The subsequent operator holds the handwheel 36 and continuously rotates the turntable 32 to drive multiple grinding rods 38 to rotate in a cycle, thereby grinding off the rust layer on the bolt head.

[0024] In this embodiment, in order to facilitate the quick installation of the rust cleaning mechanism 3 on the handle 12, a square plug 33 is fixedly installed on the fixing ring 31, and a square slot is opened at the end of the handle 12 away from the sleeve 11. The end of the square plug 33 away from the fixing ring 31 extends into the square slot, and a quick release part 313 is installed on the top of the square plug 33. The quick release part 313 can fix the square plug 33 after it is inserted into the square slot to prevent it from slipping; specifically, the quick release part 313 includes an L-shaped fixing block 3131, The plug rod 3132, the end plate 3133 and the retaining spring 3134, the L-shaped fixing block 3131 is fixedly mounted on the top of the square plug 33, the plug rod 3132 is slidably mounted on the top of the L-shaped fixing block 3131, the top of the square plug 33 is provided with a first round socket, the handle 12 is provided with an avoidance round hole, the bottom end of the plug rod 3132 passes through the avoidance round hole and extends into the first round socket, the end plate 3133 is fixedly mounted on the top of the plug rod 3132, and the retaining spring 3134 is sleeved on the plug rod 313 2, the top of the retaining spring 3134 is fixedly connected to the end plate 3133, and the bottom end is fixedly connected to the L-shaped fixing block 3131. A pull ring 3135 is welded on the top of the end plate 3133 to facilitate pulling the insertion rod 3132 upward. Before installing the rust cleaning mechanism 3, the insertion rod 3132 is pulled up by the pull ring 3135. During this process, the retaining spring 3134 will be stretched to store elastic potential energy. Then, the square plug 33 is inserted into the square slot on the handle 12. After it is inserted into place, the square plug The first circular socket on the head 33 will be axially aligned with the avoidance circular hole on the handle 12. After loosening the pull ring 3135, under the tension of the maintaining spring 3134, the insertion rod 3132 will automatically pass through the avoidance circular hole and enter the first circular socket, thereby realizing the locking of the square plug 33. Through the above arrangement, the rust cleaning mechanism 3 can be quickly installed or disassembled. The rust cleaning mechanism 3 is only used in scenarios where rust on the bolt head needs to be polished. In other scenarios, the rust cleaning mechanism 3 does not need to be installed on the handle 12.

[0025] In this embodiment, the grinding rod 38 is composed of a diamond abrasive layer (abrasive particle size of 60-80 mesh) and a core rod, and the diamond abrasive layer is fixed to the outer wall of the core rod by glue.

[0026] The worm 318 is engaged with the worm gear 316 and the worm gear 318 is engaged with the worm gear 316, and both ends of the worm gear 318 are provided with an inner hexagonal groove. The worm gear 318 is rotated by a tool (such as an inner hexagonal wrench), and the rotating rod 314 is rotated by the meshing transmission of the worm gear 316 and the worm gear 318, so that the mounting sleeve 315 and the grinding rod 38 are synchronously rotated to the target position. When the worm 318 is in the unlocked position, the locking screw 319 is screwed into the unlocked position, and the locking screw 319 is screwed into the unlocked position, so that the worm 318 can be unlocked.

[0027] In this embodiment, an auxiliary support member 4 is further installed at the bottom position of the end of the handle 12 away from the sleeve 11, which is used to provide auxiliary support to the digital handheld torque wrench 1 to maintain its stability when cleaning the rust layer on the bolt head. Specifically, the auxiliary support member 4 includes a Z-shaped rod 41, a sleeve 42 and a pad 43. The sleeve 42 is threaded on the Z-shaped rod 41, and the top of the Z-shaped rod 41 is detachably fixed to the handle 12. The pad 43 is fixedly installed at the bottom end of the sleeve 42, and a rubber pad is fixedly installed at the bottom of the pad 43. Before cleaning rust, the height of the rotating sleeve 42 is first adjusted so that the rubber pad at the bottom of the pad 43 is in close contact with the steel structure around the bolt head to form a reliable fulcrum. The fulcrum and the force point of the hand holding the handle 12 constitute two-point support. When grinding, this fulcrum can be supported by the Z-shaped rod 41 The reverse impact force generated by the friction of the rust layer is transmitted to the steel structure, thereby reducing hand shaking, sharing the gripping force that the hand needs to bear, and extending the operation time; and the bending design of the Z-shaped rod 41 can avoid the grinding area, and the rubber pad can prevent slipping and avoid scratching the steel structure. A hexagonal plug 44 is welded to the top of the Z-shaped rod 41, and a mounting round head is provided at the bottom of the handle 12. A hexagonal slot that matches the hexagonal plug 44 is provided in the mounting round head. An interference screw is also provided on the mounting round head. After inserting the hexagonal plug 44 into the hexagonal slot, tighten the interference screw clockwise to tighten the hexagonal plug 44 and fix the hexagonal plug 44 in the hexagonal slot. The auxiliary support 4 is also used in scenarios where rust on the bolt head needs to be polished. In other scenarios, it does not need to be installed on the handle 12.

[0028] In this embodiment: The present invention relates to a torque detection device for bolts of steel structure, which is based on a digital display hand-held torque wrench 1. The coaxial positioning mechanism 2 is provided to realize the precise coaxiality of the sleeve 11 and the bolt, thereby completing the torque detection. The internal threaded sleeve 21 in the coaxial positioning mechanism 2 is threadedly sleeved on the outer wall of the sleeve 11. Rotating the rotatable hand lever 28 can drive the internal threaded sleeve 21 and the horn 22 to move downward. Since the opening of the horn 22 is wide at the bottom and narrow at the top, when the horn 22 moves downward, its inner wall pushes the six sliding rods 24 toward the axis of the sleeve 11 through the ball bearings 25. The sliding rods 24 drive the clamping block 23 to move synchronously and fit the six edges of the bolt head. Since the initial circumferential position of the clamping block 23 is pre-aligned with the edges of the bolt head and is synchronously radially fed, under the action of the six-way symmetrical clamping force, the sleeve 11 The position is adaptively adjusted and finally becomes coaxial with the bolt. During torque detection, the operator holds the handle 12 and slowly rotates the sleeve 11. The sleeve 11 transmits the rotational force to the bolt head. The torque sensor built into the digital handheld torque wrench 1 monitors the rotational torque in real time and converts it into an electrical signal. When the bolt is twisted (that is, when the bolt overcomes the pre-tightening force and starts to rotate), the built-in torque sensor will capture the torque peak at this time. The digital display function will automatically lock the peak value and display it on the display screen. The operator can read the value to obtain the actual torque value of the bolt. After the detection is completed, the rotatable hand lever 28 is rotated in the opposite direction to move the horn 22 upward. The first reset spring 27 will release the potential energy to drive the sliding rod 24 and the clamping block 23 to reset. If the bolt head is rusted and needs to be cleaned, the rust cleaning mechanism 3 can be inserted into the square slot of the handle 12 through the square plug 33 and locked with the quick release 313. Then, the hexagonal sleeve 35 is pressed to cause the movable rod 37 to expand and drive the multiple grinding rods 38. After inserting them into the bolt head and releasing them, the combined force of the second return spring 310 and the third return spring 312 will cause the grinding rods 38 to gather and eventually fit the bolt head. At the same time, the hexagonal plug 44 of the auxiliary support member 4 is inserted into the hexagonal slot of the handle 12 and fixed. The sleeve 42 is then rotated so that the rubber pad at the bottom of the pad 43 is in close contact with the steel surface around the bolt head, forming a stable fulcrum. The operator then holds the handle 12 with one hand and turns the handwheel 36 with the other hand to drive the grinding rods 38 in a circular rotation, using the diamond abrasive layer to grind off the rust layer. If the abrasive layer of the grinding rod 38 is partially worn, the worm 318 can be rotated with a tool, and the meshing transmission between the worm 318 and the worm wheel 316 drives the rotating rod 314 and the mounting sleeve 315 to rotate, thereby adjusting the angle of the grinding rod 38 and aligning the unused abrasive area with the bolt head; if the overall abrasive layer is worn out, the grinding rod 38 can be removed as a whole and replaced with a new grinding rod 38. After the rust removal work is completed, the rust cleaning mechanism 3 and the auxiliary support 4 can be removed, and then the above-mentioned coaxial positioning and torque detection operations can be performed.

[0029] Second embodiment: In a second embodiment of the present invention, a method for detecting torque of a steel structure bolt is provided, comprising the following steps: T1: Install the sleeve 11 on the drive head of the digital handheld torque wrench 1, ensuring that the sleeve 11 is firmly connected and not loose; T2: Check the digital handheld torque wrench 1 to ensure that the digital display function is normal; T3: Align the sleeve 11 with the bolt head, turn the rotatable handle 28 to move the internal threaded sleeve 21 and the horn 22 downward until the clamping block 23 fits against the edge of the bolt head, making the sleeve 11 coaxial with the bolt; T4: Grip the handle 12 and rotate the sleeve 11 in the direction of tightening the bolt. At the moment when the bolt overcomes the pre-tightening force and starts to rotate in the tightening direction, read the locked torque peak on the digital display. T5: Rotate the rotatable handle 28 in the opposite direction to move the horn 22 upward, so that the clamping block 23 is separated from the edge surface of the bolt head. Then, hold the handle 12 to remove the sleeve 11 from the bolt head to complete the inspection.

[0030] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A steel structure bolt torque detection device, comprising a digital handheld torque wrench, the digital handheld torque wrench being provided with a sleeve and a handle, characterized in that: The sleeve is provided with a coaxial positioning mechanism for keeping the sleeve and the bolt head coaxial; The coaxial positioning mechanism includes an internal threaded sleeve, a horn, six clamping blocks and six sliding rods. The internal threaded sleeve is threadedly sleeved on the outer wall of the sleeve, the horn is arranged at the bottom of the internal threaded sleeve, and the horn and the internal threaded sleeve are integrally formed. Mounting grooves are provided on the six inner walls of the sleeve, and the six clamping blocks are slidably installed in the corresponding mounting grooves respectively. The six sliding rods are slidably installed on the sleeve, and the ends of the six sliding rods close to each other are fixedly connected to the corresponding clamping blocks. The end of the sliding rod away from the clamping block is movably inlaid with a ball, and the ball contacts the inner wall of the horn. A ring is fixedly sleeved on the outer wall of the sliding rod, and a first return spring is sleeved on the sliding rod, one end of the first return spring contacts the ring, and the other end contacts the sleeve.

2. The steel structure bolt torque detection device according to claim 1, characterized in that: Two rotatable hand levers are rotatably mounted on the outer wall of the internal threaded sleeve, and two magnet blocks are fixedly mounted on the outer wall of the horn. The two magnet blocks are respectively attracted to the corresponding rotatable hand levers.

3. The steel structure bolt torque detection device according to claim 2, characterized in that: A rust cleaning mechanism is also installed on the end of the handle away from the sleeve, for cleaning the rust layer on the bolt head; The rust cleaning mechanism includes a fixing ring, a turntable, a hexagonal fixing rod, a hexagonal sleeve, multiple moving rods, multiple polishing rods and multiple push-pull rods. The fixing ring is installed on the handle, the turntable is rotatably installed in the fixing ring, the hexagonal fixing rod is fixedly installed at the central position of the top of the turntable, the hexagonal sleeve is slidably sleeved on the hexagonal fixing rod, multiple moving rods are all penetrated and slidably installed on the turntable, and multiple moving rods are rotationally symmetrically distributed, multiple polishing rods are respectively installed on the bottom ends of multiple moving rods, multiple push-pull rods are respectively rotatably installed on the top ends of multiple moving rods, and the top ends of multiple push-pull rods are rotatably connected to the hexagonal sleeve. A second reset spring is sleeved on the hexagonal fixing rod, the top end of the second reset spring is in contact with the hexagonal sleeve, and the bottom end is in contact with the turntable.

4. The steel structure bolt torque detection device according to claim 3, characterized in that: The turntable is provided with a plurality of long sliding openings, and the plurality of moving rods are located in the corresponding long sliding openings. A limiting sliding rod is fixedly installed in the long sliding opening, and the limiting sliding rod passes through the moving rod and is slidably connected to the moving rod. A third return spring is sleeved on the limiting sliding rod, and one end of the third return spring contacts the moving rod, and the other end contacts the inner wall of one side of the corresponding long sliding opening.

5. The steel structure bolt torque detection device according to claim 3, characterized in that: A square plug is fixedly mounted on the fixing ring, a square slot is formed on the end of the handle away from the sleeve, the end of the square plug away from the fixing ring extends into the square slot, and a quick release part is mounted on the top of the square plug, which can fix the square plug after it is inserted into the square slot to prevent it from slipping; The quick-release part includes an L-shaped fixing block, an insertion rod, an end plate and a retaining spring. The L-shaped fixing block is fixedly installed on the top of the square plug, and the insertion rod is slidably installed on the top of the L-shaped fixing block. A first round socket is provided on the top of the square plug, and an avoidance round hole is provided on the handle. The bottom end of the insertion rod passes through the avoidance round hole and extends into the first round socket. The end plate is fixedly installed on the top end of the insertion rod, and the retaining spring is sleeved on the insertion rod. The top end of the retaining spring is fixedly connected to the end plate, and the bottom end is fixedly connected to the L-shaped fixing block.

6. The steel structure bolt torque detection device according to claim 3, characterized in that: The grinding rod consists of a diamond abrasive layer and a core rod, and the diamond abrasive layer is bonded and fixed on the outer wall of the core rod.

7. The steel structure bolt torque detection device according to claim 6, characterized in that: A rotating rod is rotatably mounted on the bottom end of the movable rod, a mounting sleeve is fixedly mounted on the bottom end of the rotating rod, the core rod is detachably fixedly connected to the mounting sleeve, a worm gear is provided on the fixed sleeve on the outer wall of the rotating rod, two fixed arms are fixedly mounted on the movable rod, the same worm is rotatably mounted on the two fixed arms, and the worm is meshed with the worm gear.

8. The steel structure bolt torque detection device according to claim 7, characterized in that: An auxiliary support member is also installed at the bottom position of the handle away from the sleeve, which is used to provide auxiliary support for the digital handheld torque wrench to maintain its stability when cleaning the rust layer on the bolt head; The auxiliary support member includes a Z-shaped rod, a sleeve and a pad. The sleeve is threadedly sleeved on the Z-shaped rod. The top end of the Z-shaped rod is detachably fixedly connected to the handle. The pad is fixedly installed on the bottom end of the sleeve.

9. The steel structure bolt torque detection device according to claim 8, characterized in that: A rubber pad is fixedly installed on the bottom of the pad.

10. A method for detecting torque of a steel structure bolt, characterized in that: The detection is performed using the steel structure bolt torque detection device according to any one of claims 1 to 9, comprising the following steps: T1: Install the socket on the drive head of the digital handheld torque wrench to ensure that the socket is firmly connected and not loose; T2: Check the digital handheld torque wrench to ensure that the digital display function is normal; T3: Align the sleeve with the bolt head, turn the rotatable handle to move the internal thread sleeve and the horn downward until the clamping block fits against the edge of the bolt head, making the sleeve coaxial with the bolt; T4: Grip the handle and rotate the sleeve in the direction of bolt tightening. When the bolt overcomes the pre-tightening force and starts to rotate in the tightening direction, read the locked torque peak on the digital display. T5: Rotate the rotatable handle in the opposite direction to move the horn upwards, separating the clamp from the edge of the bolt head. Then, hold the handle to remove the sleeve from the bolt head to complete the test.

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