Auxiliary tool for bolt stretching, fastening and assembling

Abstract

The invention provides a bolt stretching, fastening and assembling auxiliary tool. The bolt stretching, fastening and assembling auxiliary tool comprises a supporting bridge, a piston cylinder and a nut kit. The nut kit is provided with an inner hole matched with a fastening nut on a bolt to be stretched; the supporting bridge is provided with a containing cavity for containing a nut kit and a to-be-stretched bolt, and a mounting notch communicated with the containing cavity is formed in one side of the bottom of the supporting bridge; the piston cylinder comprises a cylinder base, a stretching rod vertically arranged in the cylinder base in a sliding mode and a jacking mechanism arranged in the cylinder base corresponding to the stretching rod, and the bottom of the cylinder base is rotationally connected with the supporting bridge. According to the scheme, the structure is compact, the occupied space is small, stretching operation is convenient, and compared with an existing bolt stretcher, the requirement for the height of the space, for bolt stretching, of the top of a part is lower when the tool is used.

Description

Technical Field

[0001] The invention belongs to the technical field of bolt tensioning, and in particular relates to an auxiliary tooling for bolt tensioning and fastening assembly. Background Art

[0002] Bolt tensioning tightening refers to an installation method that uses the hydraulic source provided by a hydraulic booster pump to determine the tension according to the tensile strength, yield coefficient and elongation of the material, and utilizes the tension generated by an ultra-high pressure oil pump to stretch the bolt to which the force is applied within its elastic deformation zone, causing the bolt diameter to deform slightly, thereby making the nut easy to loosen.

[0003] The biggest advantage of bolt tensioning is that it allows multiple bolts to be tightened and removed at the same time with uniform force distribution. It is a safe, efficient and fast tool and the best way to tighten and remove bolts of various specifications. Bolt tensioning is widely used in petrochemical, nuclear power, wind power, hydropower, thermal power, shipbuilding, railways, aerospace, mining, heavy machinery and other fields.

[0004] Bolt tensioning and tightening are mainly completed by bolt tensioners. Traditional bolt tensioners have a complex structure and are inconvenient to operate. When in use, the components for bolt tensioning need to be connected step by step from bottom to top. If there is limited height space or obstruction on the top of the parts, it is difficult to install the various components, resulting in the inability to perform bolt tensioning operations. Summary of the invention

[0005] In view of this, the present invention aims to propose a bolt stretching and fastening assembly auxiliary tooling, which simplifies the tooling structure, facilitates the bolt pulling operation, and has low requirements on the space height for bolt stretching at the top of the part. Even if the height space at the top of the part is subject to certain restrictions, the bolts on the part can still be stretched.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A bolt tensioning and tightening assembly auxiliary tool, comprising a support bridge, a piston cylinder and a nut kit;

[0008] The nut kit is provided with an inner hole matching the fastening nut on the bolt to be stretched;

[0009] The support bridge is provided with a receiving cavity for receiving the nut set and the bolts to be stretched, the receiving cavity runs through the upper and lower ends of the support bridge, and a mounting notch communicating with the receiving cavity is provided on one side of the bottom of the support bridge 11;

[0010] The piston cylinder includes a cylinder seat, a stretching rod vertically slidably arranged in the cylinder seat, and a lifting mechanism corresponding to the stretching rod arranged in the cylinder seat. The bottom of the cylinder seat is rotatably connected to the support bridge. The stretching rod includes a threaded sleeve, and the threaded sleeve is provided with a threaded hole matching the bolt to be stretched. The lower end of the threaded sleeve passes through the piston cylinder and extends into the accommodating cavity of the support bridge. A control ring seat is arranged on the top of the threaded sleeve.

[0011] Furthermore, the lifting mechanism includes a movable ring groove on the top surface of the piston cylinder, the movable ring groove and the stretching rod are coaxial, and a hydraulic sealing ring is arranged at the bottom of the movable ring groove;

[0012] A flow channel is provided in the hydraulic sealing ring, the flow channel outlet is arranged on the bottom surface of the hydraulic sealing ring and faces the bottom of the movable ring groove, the flow channel inlet is arranged on the upper part of the hydraulic sealing ring and is installed with a connecting pipe head for connecting with a hose, and a lifting part is arranged on the top surface of the hydraulic sealing ring corresponding to the control ring seat.

[0013] Furthermore, the lifting part includes a ring body arranged on the top surface of the hydraulic sealing ring, the top of the ring body extends out from the movable ring groove, a lap ring is arranged on the top of the ring body, the lap ring abuts the bottom surface of the control ring seat, and the bottom surface of the lap ring is close to or abuts the top surface of the cylinder seat.

[0014] Further, the ring body is arranged close to the inner end of the hydraulic sealing ring, and the lap ring embraces the threaded casing;

[0015] The flow channel is arranged vertically and outwardly, the connecting pipe head is arranged vertically at the inlet of the flow channel, a notch is provided on the top surface of the outer wall of the movable annular groove corresponding to the connecting pipe head, and the hose passes through the notch and is connected with the connecting pipe head.

[0016] Furthermore, the hydraulic sealing ring is a rubber sealing ring, and the flow channel is a metal tube structure.

[0017] Furthermore, a plurality of plug-in holes A are evenly processed on the side surface of the control ring seat in the circumferential direction.

[0018] Furthermore, the cylinder seat and the supporting bridge are rotatably connected via a connecting ring;

[0019] The outer side of the top of the supporting bridge and the outer side of the bottom of the cylinder seat are respectively processed with a receiving ring groove, and the inner wall of the receiving ring groove is processed with a limiting ring groove. The connecting ring is sleeved outside the receiving ring groove of the supporting bridge and the cylinder seat, and the connecting ring is evenly threaded with multiple limiting screws in the circumferential direction of the limiting ring groove position of the corresponding supporting bridge and the limiting ring groove position of the corresponding cylinder seat, and the tail of the limiting screw extends into the corresponding limiting ring groove and can slide along the limiting ring groove.

[0020] Furthermore, the nut kit is circular, and a plurality of plug-in holes C are evenly processed in the circumferential direction on the upper side thereof, and a plurality of plug-in holes B are evenly processed in the circumferential direction on the lower side of the nut kit, wherein the plug-in holes B are horizontally arranged and the plug-in holes C are inclined downwardly arranged.

[0021] Furthermore, a plurality of anti-slip strips are vertically arranged on the side surface of the support bridge near the top.

[0022] Compared with the prior art, the bolt tensioning and tightening assembly auxiliary tooling described in the present invention has the following advantages:

[0023] (1) This solution has a compact structure, occupies a small space and is convenient for stretching operation. The nut kit is sleeved on the outside of the fastening nut on the bolt to be stretched along the axial direction of the bolt to be stretched, and the supporting bridge is buckled on the outside of the nut kit. The supporting bridge is provided with an installation slot to enable the nut kit to rotate inside the supporting bridge, thereby meeting the stretching work of the bolt to be stretched in an environment where the top height of the part is restricted. Compared with the existing bolt tensioner, the use of this tooling has lower requirements on the space height for bolt stretching at the top of the part.

[0024] (2) In this solution, the nut kit is sleeved on the outside of the bolt to be stretched, so that the support bridge is installed on the outside of the nut kit through the installation groove in a direction perpendicular to the axis of the nut kit. After one end of the threaded sleeve is threadedly connected to the outside of the bolt to be stretched, the piston cylinder and the support bridge can be positioned simply and conveniently.

[0025] (3) In this scheme, the hydraulic sealing ring lifts the stretching rod. The hydraulic sealing ring is a rubber ring that buffers the lifting force on the stretching rod, that is, buffers the tension on the stretching bolt, ensures that the tension on the bolt to be stretched is uniform, and ensures the quality of bolt stretching. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0028] Figure 2 It is an explosion schematic diagram of the present invention;

[0029] Figure 3 For the present invention Figure 2 The enlarged schematic diagram of the middle A part;

[0030] Figure 4 For the present invention Figure 2 The enlarged schematic diagram of the middle part B;

[0031] Figure 5 It is a schematic diagram of the structure of the present invention;

[0032] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of part C in the middle.

[0033] Description of reference numerals:

[0034] 1. Stretching rod; 101. Control ring seat; 102. Threaded sleeve; 2. Plug hole A; 3. Piston cylinder; 301. Cylinder seat; 302. Hydraulic sealing ring; 303. Pipe joint; 4. Connecting ring; 5. Installation notch; 6. Anti-slip strip; 7. Nut kit; 8. Plug hole B; 9. Plug hole C; 10. Limit screw; 11. Support bridge; 12. Bolt to be stretched; 13. Fastening nut; 14. Storage ring groove; 15. Limit ring groove; 16. Lap ring; 17. Movable ring groove. DETAILED DESCRIPTION

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0036] Reference Figure 1-Figure 6 As shown, a bolt tensioning and tightening assembly auxiliary tool is used to perform a tensioning operation on a bolt 12 to be tensioned on a part. The tool comprises a supporting bridge 11, a piston cylinder 1 and a nut kit 7. The supporting bridge 11 and the piston cylinder 1 are preferably cylindrical structures. The nut kit 7 is provided with an inner hole matching the fastening nut 13 assembled on the bolt 12 to be tensioned. The nut kit 7 is sleeved outside the fastening nut 13. The nut kit 7 rotates, thereby driving the fastening nut 13 to rotate synchronously. For ease of description, the fastening nut 13 is a hexagonal nut structure, so the inner hole of the nut kit 7 is a corresponding hexagonal hole.

[0037] The support bridge 11 is provided with a receiving cavity for receiving the nut set 7 and the bolt 12 to be stretched, and the receiving cavity runs through the upper and lower ends of the support bridge 11. A mounting notch 5 communicating with the receiving cavity is provided on one side of the bottom of the support bridge 11, so that a tool can enter the receiving cavity through the mounting notch 5 and drive the nut set 7 in the receiving cavity to rotate. The top of the support bridge 11 is rotatably connected to the piston cylinder 3, and the inner sleeve of the piston cylinder 3 is connected with a stretching rod 1, which is used to connect the bolt 12 to be stretched and perform a stretching operation on the bolt 12 to be stretched. The stretching rod 1 can move up and down, and the bolt is stretched when it moves up.

[0038] like Figure 1 , Figure 2 and Figure 5As shown, the piston cylinder 3 includes a cylinder seat 301, a lifting mechanism arranged in the cylinder seat 301 corresponding to the stretching rod 1, and the lifting mechanism includes a movable ring groove 17 processed on the top surface of the cylinder seat 301, the movable ring groove 17 and the stretching rod 1 of the piston cylinder sleeve are coaxial, a hydraulic sealing ring 302 is arranged at the bottom of the movable ring groove 17, the hydraulic sealing ring 302 can move up and down in the movable ring groove 17, and the hydraulic sealing ring 302 is sealed and connected to the groove walls on both sides of the movable ring groove 17. A lifting part is arranged on the top surface of the hydraulic sealing ring 302 corresponding to the stretching rod 1, and the lifting part includes an inner end of the top surface of the hydraulic sealing ring 302, that is, a position close to the inner ring of the hydraulic sealing ring, and a lap ring 16 is formed integrally through the ring body. A flow channel is arranged in the hydraulic sealing ring 302, and the flow channel is preferably arranged vertically and outside. This structure makes the overall tooling more compact in the horizontal direction. The outlet of the flow channel is arranged on the bottom surface of the hydraulic sealing ring 302, and the inlet of the flow channel is opened on the top surface of the hydraulic sealing ring 302. The inlet of the flow channel is installed with a pipe joint 303 to connect a hose. The hydraulic oil is input by the hose, and then output to the bottom of the hydraulic sealing ring 302 and the movable ring groove 17 through the pipe joint 303 and the flow channel. The hydraulic sealing ring 302 is lifted by the hydraulic oil, and the hydraulic sealing ring 302 moves up together with the lap ring 16. The hydraulic sealing ring 302 is a metal part or a rubber part. If it is a metal part, a piston ring or a sealing ring is used to achieve the sealing of the hydraulic sealing ring 302 and the groove wall of the movable ring groove 17. This structure is a prior art and is not described in detail here. If the hydraulic sealing ring 302 adopts a rubber part, it plays a buffering role in the stretching operation, so that the bolt stretching is carried out smoothly, the bolt stretching quality is guaranteed, and it is more conducive to the bolt stretching operation. It should be noted that if the hydraulic sealing ring 302 adopts a rubber part, the flow channel for the flow of hydraulic oil provided inside it is a metal pipe structure to facilitate the flow of hydraulic oil.

[0039] In the present invention, a notch is machined at the top of the cylinder base 301 at the position of the corresponding connecting pipe head 303. Under the condition that the axis of the connecting pipe head 303 is parallel to the axis of the bolt 12 to be stretched, the hose connected to the connecting pipe head 303 can be bent and stretched out from the notch. In the case that the bolt stretching space is limited, it will not affect the hydraulic oil from being transported through the hose and the connecting pipe head 303 to the bottom of the hydraulic sealing ring 302 and the movable ring groove 17.

[0040] In the present invention, the nut set 7 is preferably a cylindrical structure, in order to facilitate the control of the nut set 7 to rotate in the accommodating cavity of the supporting bridge 11, as shown in FIG. Figure 1 , Figure 2 and Figure 5As shown, a plurality of plug holes C9 are evenly processed in the circumferential direction at the upper position of the side of the nut kit 7, and a plurality of plug holes B8 are evenly processed in the circumferential direction at the lower position of the side of the nut kit 7. The plug holes C9 and the plug holes B8 can be set to the same number, and the upper plug holes C9 and the lower plug holes B8 correspond to each other, and the plug holes C9 and the plug holes B8 in the same longitudinal plane can be in a connected state. Multiple plug holes C9 and multiple plug holes B8 are evenly spaced around the center of the nut kit 7, and the plug holes B8 are arranged in a direction perpendicular to the axis of the nut kit 7, that is, they are arranged horizontally. A rod is inserted inside the plug hole B8 to control the nut kit 7 to drive the fastening nut 13 set on the bolt 12 to be stretched to rotate. At the same time, the plug hole C9 is arranged in a direction inclined to the axis in the axial section of the nut kit 7, that is, the plug hole C9 is arranged tilted downward, and the plug hole C9 is inserted into the plug rod. At this time, the plug rod controls the nut kit 7 in an inclined state to drive the fastening nut 13 set on the bolt 12 to be stretched to rotate, and to a certain extent, the bolts around the fastening nut 13 are prevented from affecting the rotation of the rod. In the present invention, in order to insert the plug rod from the installation slot 5 into the plug hole B8 or the plug hole C9, and to ensure the space required for the plug rod to drive the nut kit 7 to rotate, the width of the installation slot 5 is to ensure that the two plug holes B8 and the two plug holes C9 can be exposed at the same time, so that when the rotation space is limited, the plug rod insertion position can be replaced, so that the plug rod can continue to drive the nut kit 7 to rotate.

[0041] Furthermore, in order to facilitate the control of the rotation of the supporting bridge 11 at the bottom of the cylinder base 301, the mounting notch 5 inside the supporting bridge 11 is made to face an open position, such as Figure 2 As shown, the top outer wall of the supporting bridge 11 is processed with a plurality of anti-slip strips 6. By making the plurality of anti-slip strips 6 surround the supporting bridge 11 at equal intervals, the supporting bridge 11 is easily rotated.

[0042] like Figure 1 , Figure 2 and Figure 5As shown, the stretching rod 1 includes a threaded sleeve 102, which extends into the accommodating cavity of the support bridge 11 and is used for threaded connection with the bolt 12 to be stretched. A control ring seat 101 is processed at the top of the threaded sleeve 102, and a plurality of plug holes A2 are evenly processed on the side, that is, the circumferential surface, of the control ring seat 101. The control ring seat 101 shown in the figure is an outer eaves structure protruding from the outer circumferential surface of the threaded sleeve 102, or it can be an outer circumferential surface of the threaded sleeve 102 with an annular groove near the top, and the upper side wall of the annular groove forms the control ring seat 101. The lap ring 16 and the control ring seat 101 of the hydraulic sealing ring 302 are arranged accordingly, the top surface of the lap ring 16 abuts against the bottom surface of the control ring seat 101, and the bottom surface of the lap ring 16 overlaps or is close to the top surface of the cylinder seat, which makes the overall structure of the tooling more compact in the vertical direction. Hydraulic oil is injected between the hydraulic sealing ring 302 and the bottom of the movable ring groove 17, and the hydraulic oil lifts the hydraulic sealing ring 302, the lap ring 16 moves up, lifts the control ring seat 101, and then lifts the threaded casing 102.

[0043] The multiple plug holes A2 on the control ring seat 101 are arranged at equal intervals around the control ring seat 101 in a direction perpendicular to the axis of the stretching rod 1. When the control rod is plugged into the plug hole A2, the threaded sleeve 102 at the bottom of the control ring seat 101 can be controlled to rotate, and the threaded sleeve 102 moves down and rotates at the same time, so that the lower end of the threaded sleeve 102 is threadedly connected with the top of the bolt 12 to be stretched on the part. After the connection, the bolt 12 to be stretched can be stretched through the stretching rod 1. In order to facilitate the alignment and threaded connection of the threaded sleeve 102 and the bolt 12 to be stretched, the height of the installation notch 5 is preferably higher than the height of the bolt 12 to be stretched protruding from the surface of the part, so as to ensure that after the device is installed on the surface of the part and the bolt 12 to be stretched is buckled in the accommodating cavity, the top of the bolt 12 to be stretched can be observed from outside the installation notch 5.

[0044] In the present invention, a connecting ring 4 is provided between the bottom of the cylinder base 301 and the top of the supporting bridge 11, and the cylinder base 301 and the supporting bridge 11 are connected by the connecting ring 4. Figure 2 , Figure 3 and Figure 4 and Figure 6As shown, a receiving ring groove 14 is processed on the outer side of the top of the supporting bridge 11 and the outer side of the bottom of the cylinder seat 301, and a limiting ring groove 15 is processed on the inner wall of the two receiving ring grooves 14 respectively. The connecting ring 4 is wrapped outside the two receiving ring grooves 14, that is, the connecting ring 4 is received inside the two receiving ring grooves 14 (in this state, the surface of the connecting ring 4 is flush with the surface of the cylinder seat 301 and the supporting bridge 11), and the connecting ring 4 is evenly threaded with a plurality of limiting screws 10 in the circumferential direction at the positions of the corresponding two limiting ring grooves 15. The limiting screws 10 are arranged perpendicular to the axial direction of the connecting ring 4, and the inner end of the limiting screw 10 is inserted into the corresponding limiting ring groove 15 and fits the bottom of the limiting ring groove 15, and the screw 10 can slide circumferentially in the limiting ring groove 15 to realize the rotational connection between the cylinder seat 301 and the supporting bridge 11.

[0045] The method of using this tool includes the following steps:

[0046] Step 1: In a space with a fixed height, keep the nut kit 7 and the bolt to be stretched 12 in a coaxial state, so that the nut kit 7 is sleeved on the outside of the fastening nut 13, ensure that the nut kit 7 and the fastening nut 13 are adapted, and ensure that the nut kit 7 can control the fastening nut 13 to rotate outside the bolt to be stretched 12;

[0047] Step 2: When the fastening nut 13 and the bolt to be stretched 12 are used as fasteners, when the fastening nut 13 is supported on the surface of the part, the supporting bridge 11 is sleeved on the outside of the nut kit 7 in a direction perpendicular to the axis of the bolt to be stretched 12;

[0048] At the same time, the support bridge 11 is controlled to rotate at the bottom of the cylinder seat 301 by means of a plurality of anti-slip strips 6 on the outer wall of the support bridge 11, so that the mounting notch 5 on the support bridge 11 faces the open area, and then the stretching rod 1 is rotated inside the piston cylinder 3, so that the threaded sleeve 102 on the stretching rod 1 is threadedly connected to the top of the bolt 12 to be stretched, so as to position the piston cylinder 3 and the support bridge 11;

[0049] Step 3: The hose connected to the pipe head 303 is bent from the notch on the top of the cylinder seat 301, and oil is injected between the bottom of the hydraulic sealing ring 302 and the bottom of the movable ring groove 17, so that the hydraulic sealing ring 302 lifts the control ring seat 101 through the lap ring 16, so that the threaded sleeve 102 stretches the bolt 12 to be stretched in the support bridge 11;

[0050] Step 4: Insert the rod for controlling the rotation of the nut kit 7 into the inside of the plug hole B8 or the plug hole C9 through the installation slot 5. After rotating the nut kit 7, the nut kit 7 can control the fastening nut 13 to rotate outside the bolt 12 to be stretched to adjust the threaded connection between the fastening nut 13 and the bolt 12 to be stretched.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bolt tensioning and tightening assembly auxiliary tool, characterized in that: It comprises a supporting bridge (11), a piston cylinder (3) and a nut set (7); The nut set (7) is provided with an inner hole matching the fastening nut (13) provided on the bolt to be stretched; The support bridge (11) is provided with a receiving cavity for receiving the nut set (7) and the bolts to be stretched, the receiving cavity passes through the upper and lower ends of the support bridge (11), and a mounting notch (5) communicating with the receiving cavity is provided on one side of the bottom of the support bridge (11); The piston cylinder (3) comprises a cylinder seat (301), a stretching rod (1) vertically slidably arranged in the cylinder seat (301), and a lifting mechanism arranged in the cylinder seat (301) corresponding to the stretching rod (1); the bottom of the cylinder seat (301) is rotatably connected to the support bridge (11); the lower end of the stretching rod (1) passes through the piston cylinder (3) and extends into the accommodating cavity of the support bridge (11); and a threaded hole matching the bolt to be stretched is provided on the bottom surface of the stretching rod (1).

2. The bolt tensioning and tightening assembly auxiliary tool according to claim 1, characterized in that: The stretching rod (1) comprises a threaded sleeve (102), a control ring seat (101) is arranged at the top of the threaded sleeve (102), and the lower end of the threaded sleeve (102) extends into the accommodating cavity; The lifting mechanism comprises a movable annular groove (17) provided on the top surface of the piston cylinder (3), the movable annular groove (17) and the stretching rod (1) are coaxial, and a hydraulic sealing ring (302) is provided at the bottom of the movable annular groove (17); A flow channel is provided in the hydraulic sealing ring (302), wherein the flow channel outlet is arranged on the bottom surface of the hydraulic sealing ring (302) and faces the bottom of the movable ring groove (17), the flow channel inlet is arranged on the upper part of the hydraulic sealing ring (302) and is provided with a pipe joint (303) for connecting with a hose, and a lifting portion is provided on the top surface of the hydraulic sealing ring (302) corresponding to the control ring seat (101).

3. The bolt tensioning and tightening assembly auxiliary tool according to claim 2, characterized in that: The lifting part includes a ring body arranged on the top surface of the hydraulic sealing ring (302), the top end of the ring body extending out from the movable ring groove (17), a lap ring (16) arranged on the top of the ring body, the top surface of the lap ring (16) abutting against the bottom surface of the control ring seat (101), and the bottom surface of the lap ring (16) is close to or abutting against the top surface of the cylinder seat (301).

4. The bolt tensioning and tightening assembly auxiliary tool according to claim 3 is characterized in that: The ring body is arranged close to the inner end of the hydraulic sealing ring (302), and the lap ring (16) surrounds the threaded sleeve (102); The flow channel is arranged vertically and outwardly, and the connecting pipe head (303) is arranged vertically at the inlet of the flow channel. A notch is formed on the top surface of the outer wall of the movable annular groove (17) corresponding to the connecting pipe head (303), and the hose passes through the notch and is connected to the connecting pipe head (303).

5. The bolt tensioning and tightening assembly auxiliary tool according to claim 2, characterized in that: The hydraulic sealing ring (302) is a rubber sealing ring, and the flow channel is a metal tube structure.

6. The bolt tensioning and fastening assembly auxiliary tool according to claim 2, characterized in that: The side surface of the control ring seat (101) is uniformly processed with a plurality of plug-in holes A (2) in the circumferential direction.

7. The bolt tensioning and tightening assembly auxiliary tool according to claim 1, characterized in that: The cylinder seat (301) and the supporting bridge (11) are rotatably connected via a connecting ring (4); The outer side of the top of the supporting bridge (11) and the outer side of the bottom of the cylinder seat (301) are respectively processed with a receiving ring groove (14), and the inner wall of the receiving ring groove (14) is processed with a limiting ring groove (15). The connecting ring (4) is sleeved outside the receiving ring groove (14) of the supporting bridge (11) and the cylinder seat (301), and the connecting ring (4) is evenly threadedly connected with a plurality of limiting screws (10) in the circumferential direction at the position of the limiting ring groove (15) of the corresponding supporting bridge (11) and the position of the limiting ring groove (15) of the corresponding cylinder seat (301), and the tail of the limiting screw (10) extends into the corresponding limiting ring groove (15) and can slide along the limiting ring groove (15).

8. The bolt tensioning and tightening assembly auxiliary tool according to claim 1, characterized in that: The nut set (7) is circular, and a plurality of plug holes C (9) are evenly processed in the circumferential direction at the upper position of the side surface, and a plurality of plug holes B (8) are evenly processed in the circumferential direction at the lower position of the side surface of the nut set (7), wherein the plug holes B (8) are arranged horizontally, and the plug holes C (9) are arranged obliquely downward.

9. The bolt tensioning and tightening assembly auxiliary tool according to claim 1, characterized in that: A plurality of anti-slip strips (6) are vertically arranged on the side surface of the support bridge (11) near the top end.

Images