Auxiliary device for fastening installation of hydraulic tensioner

Abstract

The invention discloses an auxiliary device for fastening installation of a hydraulic stretcher, and relates to the technical field of fastening installation, the auxiliary device comprises a bottom frame, the bottom frame is vertically connected with a placing frame in a sliding mode, the placing frame is connected with a sliding plate in a sliding mode, the placing frame is provided with a stretcher body, the sliding plate is used for supporting a stretching nut, and the stretching nut is connected with the sliding plate in a sliding mode. The sliding rod is horizontally connected with an arc-shaped magnet in a sliding mode, and the arc-shaped magnet and the sliding rod are fixed through a fastener. According to the auxiliary device, the arc-shaped magnet and the circular pipe are relatively fixed in position relation, namely, the arc-shaped magnet cannot deviate from the surface of the circular pipe, so that the tensioner body cannot incline in the process of transferring to the next bolt position along with the auxiliary device, and the bolt hole position of the tensioner body is horizontally positioned to the bolt position; and therefore, the acting force direction of the hydraulic stretcher is kept coaxial with the axis of the bolt, and the safety and effectiveness of the stretching process are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of fastening and installation, and in particular to an auxiliary device for fastening and installation of a hydraulic tensioner. Background Art

[0002] A hydraulic tensioner is a tool used for pre-tightening industrial fasteners. The high-pressure oil generated by the hydraulic system pushes the piston, causing the bolt to undergo axial tensile deformation and slightly thinner diameter, thus reducing friction between the bolt and the nut, making the nut easier to tighten. By precisely controlling the amount of bolt stretching, the pre-tightening force of the bolt can be precisely controlled.

[0003] When using a hydraulic tensioner to stretch the nuts at the connection of two metal round tubes (magnetic materials), it is necessary to choose whether to place the hydraulic tensioner above the bolt head (upright) or below (inverted) according to the specific conditions of the work site, such as space limitations, bolt layout, and convenience of operation. Compared with the upright operation, the inverted operation of the hydraulic tensioner is usually more difficult, because this process not only requires high physical strength from the operator, but also in the process of lifting and rotating the hydraulic tensioner, the operator may face excessive physical burden and potential safety hazards. Therefore, when inverted, the conventional practice is to support the hydraulic tensioner with a bracket to stabilize it. However, when stretching a circle of bolts one by one, it is necessary to frequently manually adjust the position of the bracket horizontally to adapt to the operating points of different bolts, and ensure that the hydraulic tensioner is coaxial with the bolt axis to ensure the safety and effectiveness of the stretching process. Because the hydraulic tensioner is inserted into the bolt at an angle, not only will the direction of the force deviate from the bolt axis, causing uneven force on the bolt and failure to effectively stretch the bolt, and even causing damage to the bolt or internal parts of the tensioner, but it will also affect the control accuracy of the preload force, resulting in a deviation between the actual preload force and the target preload force.

[0004] Based on the above situation, the present invention proposes an auxiliary device for fastening and installing a hydraulic tensioner. Summary of the invention

[0005] In order to overcome the disadvantage that it is difficult to accurately and horizontally adjust the positions of the bracket and the hydraulic tensioner for each bolt, the present invention provides an auxiliary device for fastening and installing the hydraulic tensioner.

[0006] An auxiliary device for fastening and installing a hydraulic stretcher, comprising a base frame, the base frame is vertically slidably connected to a placement frame, a plurality of springs are fixedly connected between the base frame and the placement frame, the placement frame is slidably connected to a slide plate, a plurality of first tension springs are fixedly connected between the slide plate and the placement frame, a stretcher body is placed on the placement frame, the slide plate is used to support a stretching nut, the slide plate is fixedly connected to a clamping rod symmetrically distributed along the slide plate, the base frame is horizontally slidably connected to a limiting frame, the base frame is vertically slidably connected to a slider, the limiting frame is extruded and fitted with the slider, the placement frame is clamped with an arc-shaped fitting block, the base frame is horizontally slidably connected to a slide rod, the slide rod is horizontally slidably connected to an arc-shaped magnet, and the arc-shaped magnet is fixed to the slide rod by fasteners.

[0007] Optionally, the slider is configured as an isosceles triangle, and a side of the slider close to the limiting frame is configured as a wedge-shaped surface.

[0008] Optionally, a pressing frame is further included, wherein the pressing frame is slidably connected to the base frame, and the pressing frame is limitedly matched with the limiting frame through an inclined groove.

[0009] Optionally, the arc-shaped fitting block and the arc-shaped magnet have the same curvature rate.

[0010] Optionally, the fastener is configured as a screw.

[0011] Optionally, a pull rod is further included, wherein the pull rod is fixedly connected to the sliding block, the sliding rod is fixedly connected to a guide block, and the guide block is limitedly matched with the pull rod through an inclined groove.

[0012] Optionally, a second tension spring is further included, and two ends of the second tension spring are respectively fixed to the base frame and the sliding rod.

[0013] Optionally, it also includes a plurality of card slots, which are opened on the placement rack, the base frame is fixed with fixed blocks distributed in pairs, the fixed blocks are horizontally slidably connected with the card rack, the card rack cooperates with the adjacent card slots to slow down the placement rack, and a third tension spring is fixed between the fixed block and the adjacent card rack.

[0014] Optionally, a rotating frame symmetrically distributed along the placement frame is further included, the rotating frame is rotatably connected to the placement frame and is used to limit the stretcher body, and a torsion spring is fixed between the placement frame and the rotating frame.

[0015] Optionally, it further includes fixed frames symmetrically distributed along the base frame, the fixed frames are fixedly connected to the base frame, and the rotating frame is extrusion-fitted with adjacent fixed frames.

[0016] The beneficial effects of the present invention are as follows: the present invention uses the relatively fixed position relationship between the arc magnet and the round tube, that is, the arc magnet will not deviate from the surface of the round tube, so that the stretcher body will not be skewed during the process of being transferred to the next bolt position with the auxiliary device, so that the bolt hole position of the stretcher body is horizontally positioned at the bolt, and then the force direction of the hydraulic stretcher is kept coaxial with the bolt axis, so as to ensure the safety and effectiveness of the stretching process.

[0017] The present invention can replace the arc-shaped fitting block by a simple karaoke method, and replace the arc-shaped magnet by disassembling the fastener, so that the sizes of the arc-shaped fitting block and the arc-shaped magnet can adapt to round pipes of different diameters, thereby improving the applicability of the auxiliary device.

[0018] In the process of pressing down the placement rack, when the slider is squeezed and slides upward, the slider drives the pull rod to move upward, so that the arc magnet is separated from the round tube. That is, before preparing to move, the arc magnet is separated from the round tube, so that the auxiliary device is easy to move.

[0019] In the process of the placement rack moving up and down, the clamping frame will intermittently slide back and forth along the fixed block to hinder the movement of the placement rack, thereby achieving a deceleration effect and preventing the placement rack from rebounding too quickly, thereby preventing the tensioner body and the bolt from being damaged due to high-speed collision when they are misaligned with each other.

[0020] When the placement rack moves upward, the rotating rack moves upward with the placement rack. When the rotating rack is separated from the fixed rack, the torsion spring resets and drives the rotating rack to swing upward and reset, thereby achieving the effect of automatically locking the stretcher body by the rotating rack, preventing the stretcher body from shaking at will, avoiding affecting the subsequent tightening operation, and improving the stability of the tightening operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 2 It is a three-dimensional structural schematic diagram of the present invention in use state.

[0023] Figure 3 It is a three-dimensional structural schematic diagram of the base frame, the placement frame, the spring and other components of the present invention.

[0024] Figure 4 It is a three-dimensional structural schematic diagram of components such as the slide plate, the first tension spring and the stretcher body of the present invention.

[0025] Figure 5 It is a three-dimensional structural schematic diagram of the fastener, pull rod, guide block and other components of the present invention.

[0026] Figure 6 This is a three-dimensional structural separation diagram of the fixing block, the bracket, the third tension spring and other components of the present invention.

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the placement rack, the fixing block, the clamping rack and the third tension spring of the present invention.

[0028] Figure 8 It is a three-dimensional structural schematic diagram of the rotating frame, torsion spring, fixing frame and other components of the present invention.

[0029] Markings in the accompanying drawings: 1: base frame, 2: placement frame, 3: spring, 4: slide plate, 5: first tension spring, 6: stretcher body, 601: stretching nut, 7: clamping rod, 8: limit frame, 9: slider, 10: pressure frame, 11: arc-shaped fitting block, 12: slide bar, 13: arc-shaped magnet, 14: fastener, 15: pull rod, 16: guide block, 17: second tension spring, 18: clamping slot, 19: fixed block, 20: clamping frame, 21: third tension spring, 22: rotating frame, 23: torsion spring, 24: fixed frame. DETAILED DESCRIPTION

[0030] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0031] Embodiment 1: An auxiliary device for fastening and installing a hydraulic tensioner, such as Figures 1 to 5 As shown, it includes a base frame 1, the base frame 1 is slidably connected to a placement frame 2 in the up-down direction, three springs 3 are fixedly connected between the base frame 1 and the placement frame 2, the upper part of the placement frame 2 is slidably connected to a slide plate 4 in the up-down direction, three first tension springs 5 ​​are fixedly connected between the slide plate 4 and the placement frame 2, a stretcher body 6 is placed on the upper part of the placement frame 2, the slide plate 4 is used to stretch the nut 601, the slide plate 4 is fixedly connected to the clamping rod 7 symmetrically distributed along the left and right sides of the slide plate 4, the base frame 1 is horizontally slidably connected to a limit frame 8, and a slider 9 is slidably connected to the side of the base frame 1 close to the limit frame 8 in the up-down direction, the slider 9 is set to be an isosceles triangle, and the slider 9 is close to One side of the limit frame 8 is set as a wedge-shaped surface, and the limit frame 8 is squeezed and matched with the wedge-shaped surface of the slider 9. The side of the base frame 1 close to the slider 9 is slidably connected with a pressing frame 10 in the up and down directions. The pressing frame 10 is limitedly matched with the limit frame 8 through an inclined groove. The upper part of the placement frame 2 is clamped with an arc-shaped fitting block 11, and the arc-shaped fitting block 11 fits with the surface of the round tube. The lower part of the base frame 1 is horizontally slidably connected with a slide rod 12, and the slide rod 12 is horizontally slidably connected with an arc-shaped magnet 13. The curvature of the arc-shaped fitting block 11 and the arc-shaped magnet 13 is the same. The arc-shaped magnet 13 is fixed to the slide rod 12 by a fastener 14, and the fastener 14 is set as a screw.

[0032] First, the placement frame 2 is pressed down, the spring 3 is compressed, the slide plate 4 moves downward with the placement frame 2, and the downward movement of the slide plate 4 drives the clamping rod 7 to move synchronously. The clamping rod 7 moves downward and contacts the limiting frame 8, and squeezes the limiting frame 8 to move in the direction close to the slider 9. The slider 9 is squeezed and moved upward. At the same time, the pressing frame 10 is squeezed downward by the limiting frame 8. When the clamping rod 7 moves below the limiting frame 8, the slider 9 slides downward under the action of gravity and squeezes the limiting frame 8 to slide to the side away from the slider 9. At the same time, the pressing frame 10 is squeezed upward and reset by the limiting frame 8. In this way, the clamping rod 7 is clamped by the limiting frame 8, so that the placement frame 2 is in a low position where the stretcher body 6 is easily placed.

[0033] Next, the entire device is moved under the bolt that needs to be tightened, so that the bolt and the bolt hole of the tensioner body 6 are aligned up and down, and the arc-shaped fitting block 11 and the arc-shaped magnet 13 are both attached to the round tube, and then the tensioner body 6 is clamped on the placement frame 2, and the tensioning nut 601 is supported on the slide plate 4, and then the pressing frame 10 is pressed downward, and the pressing frame 10 squeezes the limit frame 8 through the inclined groove to slide to the side close to the slider 9, and the slider 9 is squeezed and slides upward. When the limit frame 8 no longer blocks the clamping rod 7, the spring 3 is reset to drive the placement frame 2 to slide upward, so that the bolt is inserted into the bolt hole of the tensioner body 6, and then the hydraulic cylinder of the tensioner body 6 is started. The hydraulic cylinder transmits pressure through the hydraulic oil to directly apply external force to the bolt. The bolt will be axially stretched by the tensioning nut 601 within its elastic deformation range, and the first tension spring 5 is stretched, so that the hydraulic tensioner performs the tightening operation of the bolt;

[0034] After tightening a bolt at the connection of the circular tube, repeat the above operation of pressing the placement frame 2 down to the low position, and then push the auxiliary device along the circular tube. When the arc-shaped fitting block 11 and the arc-shaped magnet 13 are in contact with the circular tube, the magnetic lines of force will form a closed path between the arc-shaped magnet 13 and the circular tube, and the magnetic attraction of the arc-shaped magnet 13 acts along the direction of the magnetic lines of force. This closed path determines the distribution of the contact points between the arc-shaped magnet 13 and the circular tube, thereby fixing the positional relationship of the arc-shaped magnet 13 relative to the circular tube, and the circular cross-section of the circular tube gives the arc-shaped magnet 1 3 provides a clear sliding path, so that the arc magnet 13 can only slide along the surface of the round tube, and cannot deviate from the surface of the round tube. Therefore, when the arc magnet 13 is attached to the round tube and circles around the surface of the round tube, its trajectory is generally a fixed circular track. In this way, it is ensured that the stretcher body 6 will not be skewed during the transfer to the next bolt position with the auxiliary device, thereby ensuring that the bolt hole position of the stretcher body 6 is horizontally positioned at the bolt, and then ensuring that the force direction of the hydraulic stretcher is coaxial with the bolt axis, so as to ensure the safety and effectiveness of the stretching process;

[0035] When the bolt hole of the stretcher body 6 moves in a circular shape to just below the bolt, the pressing frame 10 is pressed downward again to insert the second bolt into the bolt hole of the stretcher body 6, and then the hydraulic cylinder of the stretcher body 6 is started to stretch and tighten the second bolt. This is repeated until all the bolts are stretched and tightened.

[0036] In addition, the arc-shaped fitting block 11 and the arc-shaped magnet 13 of corresponding size can be replaced according to the diameter of the round tube. The arc-shaped fitting block 11 can be replaced by a simple carabiner, and the arc-shaped magnet 13 can be replaced by disassembling the fastener 14.

[0037] like Figure 5 As shown, it also includes a pull rod 15, which is fixedly connected to the slider 9, and a guide block 16 is fixedly connected to one end of the slider 12 close to the pull rod 15. The guide block 16 is limitedly matched with the pull rod 15 through an inclined groove, and a second tension spring 17 is fixedly connected between the base frame 1 and the slider 12.

[0038] In addition, since the arc magnet 13 is difficult to move due to the magnetic attraction when it slides along the circular tube, the arc magnet 13 is separated from the circular tube before being moved, so that the auxiliary device is easy to move. Before aligning the bolt with the bolt hole of the stretcher body 6, the arc magnet 13 is adsorbed on the circular tube, so that the auxiliary device and the stretcher body 6 are horizontally attached to the circular tube. The specific operation is as follows:

[0039] During the process of pressing down the placement rack 2, when the slider 9 is squeezed and slides upward, the slider 9 drives the pull rod 15 to move upward, thereby pulling the guide block 16 to slide toward the side close to the pull rod 15, and the guide block 16 drives the arc magnet 13 to move toward the side away from the round tube through the slide rod 12, and the second tension spring 17 is stretched. When the arc magnet 13 is separated from the round tube, the entire device is removed, and then in the process of continuing to press down the placement rack 2, when the slider 9 slides downward under the action of gravity, the slider 9 drives the pull rod 15 to move downward, and the pull rod 15 pushes the guide block 16 to slide toward the side away from the pull rod 15, and the guide block 16 drives the arc magnet 13 to move and reset through the slide rod 12, and the second tension spring 17 is reset.

[0040] In this way, when the placement rack 2 is pressed down, the arc magnet 13 can be separated from the round tube, which makes it convenient to transfer the entire device to the next bolt. The arc magnet 13 and the round tube are then adsorbed to horizontally position the auxiliary device, avoiding the arc magnet 13 sliding along the arc of the round tube, which makes it difficult to move the auxiliary device.

[0041] Embodiment 2: Based on embodiment 1, Figure 6 to Figure 7As shown, eighteen card slots 18 are also included. The card slots 18 are opened on the placement rack 2. Three pairs of fixed blocks 19 are fixedly connected to the middle of the base frame 1. The fixed blocks 19 are horizontally slidably connected to the card racks 20. The card racks 20 cooperate with adjacent card slots 18 to slow down the placement rack 2. A third tension spring 21 is fixedly connected between the fixed blocks 19 and the adjacent card racks 20.

[0042] During the up and down sliding process of the placement rack 2, the slot 18 moves up and down accordingly. When the slot 18 moves to the bracket 20, under the action of the elastic force of the third spring 3 and the slot 18, the bracket 20 will intermittently slide back and forth along the fixed block 19. In this way, the bracket 20 hinders the movement of the placement rack 2 and has a deceleration effect, thereby preventing the placement rack 2 from rebounding too quickly, thereby preventing the tensioner body 6 and the bolt from being damaged due to high-speed collision when they are misaligned with each other.

[0043] Embodiment 3: Based on embodiment 2, Figure 8 As shown, it also includes a rotating frame 22 which is symmetrically distributed along the placement frame 2. The rotating frame 22 is rotatably connected to the placement frame 2 and is used to limit the stretcher body 6 to prevent the stretcher body 6 from shaking randomly. A torsion spring 23 is fixed between the placement frame 2 and the rotating frame 22. A fixed frame 24 which is symmetrically distributed along the base frame 1 is fixed to the middle part of the base frame 1. The upper part of the fixed frame 24 is set as a wedge-shaped surface. When the rotating frame 22 moves downward, it will be squeezed and matched with the adjacent wedge-shaped surface of the fixed frame 24.

[0044] When the placing rack 2 moves downward, the rotating rack 22 moves downward with the placing rack 2. When the rotating rack 22 contacts the fixed rack 24, the rotating rack 22 swings downward due to the squeezing effect of the fixed rack 24, and the torsion spring 23 is deformed. Then the stretcher body 6 can be placed on the placing rack 2. When the placing rack 2 moves upward, the rotating rack 22 moves upward with the placing rack 2. When the rotating rack 22 is separated from the fixed rack 24, the torsion spring 23 is reset to drive the rotating rack 22 to swing upward and reset. In this way, the stretcher body 6 is automatically locked to prevent the stretcher body 6 from shaking at will, so as to avoid affecting the subsequent tightening operation and improve the stability of the tightening operation.

[0045] Although the present disclosure has been shown and described with reference to specific exemplary embodiments of the present disclosure, it should be understood by those skilled in the art that various changes in form and details may be made to the present disclosure without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-mentioned embodiments, but should be determined not only by the appended claims, but also by the equivalents of the appended claims.

Claims

1. An auxiliary device for fastening and installing a hydraulic tensioner. It is characterized in that The invention comprises a base frame (1), wherein the base frame (1) is vertically slidably connected to a placing frame (2), a plurality of springs (3) are fixedly connected between the base frame (1) and the placing frame (2), a slide plate (4) is slidably connected to the placing frame (2), a plurality of first tension springs (5) are fixedly connected between the slide plate (4) and the placing frame (2), a stretcher body (6) is placed on the placing frame (2), the slide plate (4) is used to support a stretching nut (601), and the slide plate (4) is fixedly connected to a plurality of springs (3) symmetrically arranged along the slide plate (4). The base frame (1) is horizontally slidably connected to a limiting frame (8), the base frame (1) is vertically slidably connected to a slider (9), the limiting frame (8) and the slider (9) are pressed together, the placement frame (2) is clamped with an arc-shaped fitting block (11), the base frame (1) is horizontally slidably connected to a sliding rod (12), the sliding rod (12) is horizontally slidably connected to an arc-shaped magnet (13), and the arc-shaped magnet (13) and the sliding rod (12) are fixed by a fastener (14).

2. An auxiliary device for fastening and installing a hydraulic tensioner according to claim 1, It is characterized in that The sliding block (9) is configured as an isosceles triangle, and a side of the sliding block (9) close to the limiting frame (8) is configured as a wedge-shaped surface.

3. An auxiliary device for fastening and installing a hydraulic tensioner according to claim 2, It is characterized in that It also includes a pressing frame (10), the pressing frame (10) is slidably connected to the base frame (1), and the pressing frame (10) is limitedly matched with the limiting frame (8) through an inclined groove.

4. An auxiliary device for fastening and installing a hydraulic tensioner according to claim 3, It is characterized in that The arc-shaped bonding block (11) and the arc-shaped magnet (13) have the same curvature rate.

5. An auxiliary device for fastening and installing a hydraulic tensioner according to claim 4, It is characterized in that The fastener (14) is configured as a screw.

6. An auxiliary device for fastening and installing a hydraulic tensioner according to claim 5, It is characterized in that It also includes a pull rod (15), the pull rod (15) is fixedly connected to the sliding block (9), the sliding rod (12) is fixedly connected to a guide block (16), and the guide block (16) is limitedly matched with the pull rod (15) through an inclined groove.

7. An auxiliary device for fastening and installing a hydraulic tensioner according to claim 6, It is characterized in that It also includes a second tension spring (17), the two ends of which are respectively fixedly connected to the base frame (1) and the sliding rod (12).

8. An auxiliary device for fastening and installing a hydraulic tensioner according to claim 7, It is characterized in that It also includes a plurality of card slots (18), wherein the card slots (18) are opened on the placement rack (2), the base frame (1) is fixedly connected with fixed blocks (19) distributed in pairs, the fixed blocks (19) are horizontally slidably connected with card racks (20), the card racks (20) cooperate with adjacent card slots (18) to decelerate the placement rack (2), and a third tension spring (21) is fixedly connected between the fixed blocks (19) and the adjacent card racks (20).

9. An auxiliary device for fastening and installing a hydraulic tensioner according to claim 8, It is characterized in that It also includes a rotating frame (22) symmetrically distributed along the placement frame (2), the rotating frame (22) is rotatably connected to the placement frame (2) and is used to limit the position of the stretcher body (6), and a torsion spring (23) is fixed between the placement frame (2) and the rotating frame (22).

10. An auxiliary device for fastening and installing a hydraulic tensioner according to claim 9, It is characterized in that It also includes fixed frames (24) symmetrically distributed along the base frame (1), the fixed frames (24) being fixedly connected to the base frame (1), and the rotating frame (22) being pressed and matched with the adjacent fixed frames (24).

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