Tool for installing bolt in narrow space and construction method

Abstract

The invention relates to a tool for installing a bolt in a narrow space, comprising a holding rod, one end of the holding rod can extend into the narrow space, and the other end of the holding rod can be held by hand and adjust the position of the extending section of the holding rod to a bolt hole; the clamping assembly is connected to the end of the stretching-in section, and a nut and a threaded rod of the bolt can be clamped and fixed through the clamping assembly; the inward view assembly is connected to the holding rod and used for displaying the positions of the clamping assembly, the bolt and the bolt hole; the traction rope is arranged along the outer wall of the holding rod; the pullable handle is arranged on the holding rod, the pullable handle is connected with the other side of the pulling rope, and the pulling rope can be pulled to enable the clamping assembly to clamp the nut and the screw rod; and the driving assembly is connected with the clamping assembly and can drive the clamping assembly to drive the nut to be in threaded connection with the screw rod. Through the holding rod and the clamping assembly, a bolt can be clamped and extends into a narrow space for operation, auxiliary construction can be observed through the inward viewing assembly, the working efficiency is improved, and the construction quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of construction engineering, and in particular to a tool for installing bolts in a narrow space and a construction method. Background Art

[0002] In order to improve the installation quality of the air duct system and reduce the air leakage of the civil air shaft, according to the requirements of national standards and specifications, some smoke exhaust, positive pressure air supply and ventilation systems should not directly use the civil air shaft, and lined air ducts should be installed in the civil air shaft. The installation space between the side wall of the civil air shaft and the outer wall of the air duct is narrow, which increases the difficulty of installing the lined air duct.

[0003] At this stage, it is necessary to increase the installation space between the side wall of the civil air shaft and the outer wall of the air duct, and reserve operating space for manual entry to tighten the bolts. Some air shafts have some bolts that are not tightened because the on-site construction conditions cannot meet the requirements of manual operation space; or after connecting the upper and lower air ducts in sections through the vertical shaft, they are vertically hoisted from the high-rise to the low-rise, and fixed with fixed brackets.

[0004] These existing construction methods often cause the air leakage of the air duct to fail to meet the national standard requirements, affecting the installation quality of the air duct system. In addition, the existing installation process does not realize the tooling of special installation construction, requiring a large number of on-site workers to operate, which is inefficient and affects the construction progress. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a tool and a construction method for installing bolts in a narrow space, so as to solve the problems of narrow installation space, great construction difficulty, low work efficiency and poor installation quality.

[0006] The technical solution to achieve the above object is: a tool for installing bolts in a narrow space, comprising: a holding rod, one end of which can be extended into the narrow space, and the other end can be held and moved to adjust the position of the extending section on the holding rod to the bolt hole; a clamping assembly, which is connected to the end of the extending section on the holding rod, and the clamping assembly can clamp the nut and the screw of the bolt respectively; an internal viewing assembly, which is connected to the holding rod and is used to display the corresponding positions of the clamping assembly, the bolt and the bolt hole; A traction rope, the traction rope is arranged along the outer wall of the holding rod, and one side of the traction rope is connected to the clamping assembly; a pullable handle, the pullable handle is arranged on the holding rod, and the pullable handle is connected to the other side of the traction rope, and the pullable handle can pull the traction rope to allow the clamping assembly to clamp the nut and the screw; a driving assembly, the driving assembly is connected to the other end of the holding rod, and the driving assembly is connected to the clamping assembly, and the driving assembly can drive the clamping assembly to drive the nut and the screw to be screwed together.

[0007] The present invention provides a tool for installing bolts in a narrow space. The tool can clamp the bolts and extend into the narrow space for operation through a holding rod and a clamping assembly. The tool can also assist in construction through observation through an internal viewing assembly, thereby improving work efficiency and ensuring construction quality.

[0008] A further improvement of the tool for installing bolts in a narrow space of the present invention is that the clamping assembly includes: a first connecting rod; a screwing assembly, one side of the screwing assembly is connected to the end of the first connecting rod, and the screwing assembly is connected to the driving assembly, and the screwing assembly rotates under the driving force; a buckle, the buckle can clamp the screw rod, the buckle is arranged on the other side of the screwing assembly, and the buckle and the screw rod can rotate as a whole; a second connecting rod, the second connecting rod is arranged opposite to the first connecting rod; a bracket, the bracket is connected to the end of the second connecting rod, and the bracket is arranged opposite to the buckle, and the bracket can accommodate the nut; a telescopic assembly, the telescopic assembly is connected between the first connecting rod and the second connecting rod, and can telescopically adjust the distance between the first connecting rod and the second connecting rod.

[0009] A further improvement of the tool for installing bolts in a narrow space of the present invention is that the clamping assembly further includes: a protective cover, and the protective cover is arranged on the outside of the screwing assembly and the buckle.

[0010] A further improvement of the tool for installing bolts in a narrow space of the present invention is that the screwing assembly includes: a first transmission shaft, the first transmission shaft is connected to the driving assembly, and the first transmission shaft is rotated by the driving force; a first gear, the first gear is sleeved on the outside of the first transmission shaft, and the first gear is driven by the first transmission shaft to rotate synchronously; a second gear, the second gear is correspondingly meshed with the first gear, and the second gear can rotate under force; a second transmission shaft, one side of the second transmission shaft is connected to the second gear, and the other side is connected to the buckle, and the second transmission shaft can drive the buckle and the clamped screw to rotate together.

[0011] A further improvement of the tool for installing bolts in a narrow space of the present invention is that the telescopic assembly includes: a first sleeve, one side of the first sleeve is connected to the end of the first connecting rod away from the screwing assembly, and the other side of the first sleeve is arranged to be an opening; a second sleeve, one side of the second sleeve is connected to the end of the second connecting rod away from the bracket, and the other side of the second sleeve is movably connected to the opening of the first sleeve; a spring, the spring is arranged inside the second sleeve, and the spring is compressed by the force caused by the movement of the first sleeve.

[0012] A further improvement of the tool for installing bolts in a narrow space of the present invention is that a fixing ring is provided on the first connecting rod, and the fixing ring is used to position the traction rope.

[0013] A further improvement of the tool for installing bolts in a narrow space of the present invention is that a fixing hook is provided on the clamping assembly, and the fixing hook is used to connect the end of the traction rope.

[0014] A further improvement of the tool for installing bolts in a narrow space of the present invention is that the interior viewing component includes: a camera connected to the clamping component; and a fill light, which is arranged adjacent to the camera.

[0015] A further improvement of the tool for installing bolts in a narrow space of the present invention is that the internal viewing component also includes: a display screen, which is arranged on the holding rod, the display screen is connected to the camera, and the display screen is used for people to observe in order to adjust the position of the extension section on the holding rod.

[0016] A construction method for installing bolts in a narrow space using tools, comprising the following steps: docking two upper and lower sections of air duct in an air shaft, and aligning the bolt holes of the upper and lower air duct flanges; placing a nut in the bracket of a clamping assembly, and snapping a screw into the buckle of the clamping assembly; holding a holding rod, and extending the end of the clamping assembly provided on the holding rod into the narrow space between the outer wall of the air duct and the side wall of the air shaft; observing through an internal viewing assembly whether the screw clamped by the clamping assembly correctly passes through the bolt holes on the upper and lower air duct flanges; after determining that the end of the screw passes through the bolt hole, tightening the traction rope through a pullable handle to pull the first connecting rod and the buckle toward the bracket, driving the screw and the nut to be pressed together; starting the driving assembly, driving the screwing assembly to rotate to drive the screw to rotate, and threading the screw and the nut together. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic structural diagram of a tool for installing bolts in a narrow space.

[0018] Figure 2 The present invention is a cross-sectional view of a tool for installing bolts in a narrow space.

[0019] Figure 3 The present invention is a schematic flow chart of a construction method for installing bolts in a narrow space using tools.

[0020] Figure 4 It is a schematic diagram of the structure of the installation hole reserved on the air shaft of the present invention.

[0021] In the figure: 10, tool; 11, holding rod; 12, clamping assembly; 121, first connecting rod; 122, second connecting rod; 123, buckle; 124, bracket; 125, protective cover; 126, first transmission shaft; 127, first gear; 128, second gear; 129, second transmission shaft; 1210, first sleeve; 1211, second sleeve; 1212, spring; 1213, fixing ring; 1214, fixing hook; 13, inner viewing assembly; 131, camera; 132, display screen; 14, traction rope; 15, pullable handle; 16, driving assembly; 20, bolt; 21, nut; 22, screw; 30, air shaft; 31, air duct; 32, air duct flange; 33, bolt hole; 34, reserved installation hole; 40, narrow space; 50, brick wall. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] See also Figure 1 , showing a schematic diagram of the structure of a tool for installing bolts in a narrow space according to the present invention. The present invention provides a tool for installing bolts in a narrow space, comprising: a holding rod 11, one end of which can be inserted into the narrow space 40, and the other end of which can be held and moved to adjust the position of the insertion section of the holding rod 11 to the bolt hole 33.

[0024] The material and size of the holding rod 11 can be set according to actual needs and are not specifically limited here.

[0025] In this embodiment, the holding rod 11 can be configured as a telescopic rod, so as to facilitate adjustment of the length of the extending section according to the narrow space 40 during construction.

[0026] The clamping assembly 12 is connected to the end of the extending section of the holding rod 11, and the clamping assembly 12 can clamp the nut 21 and the screw rod 22 of the bolt 20 respectively.

[0027] The movement of the hand-grip rod 11 can correspondingly adjust the position of the clamping assembly 12 in the narrow space 40. The bolt 20 matches and corresponds to the bolt hole 33 on the duct flange 32.

[0028] The inner viewing component 13 is connected to the holding rod 11 and is used to display the corresponding positions of the clamping component 12 , the bolt 20 and the bolt hole 33 .

[0029] Among them, one end of the inner viewing component 13 can be extended into the narrow space 40, and the other end is displayed on the outside, which can help the auxiliary bolt 20 to align with the bolt hole 33, reduce the construction difficulty, and improve the construction efficiency.

[0030] The traction rope 14 is arranged along the outer wall of the holding rod 11 , and one side of the traction rope 14 is connected to the clamping assembly 12 .

[0031] One end of the traction rope 14 is manually controlled by the construction personnel, and the other end is connected to the clamping assembly 12 , so that the construction personnel can directly pull and control the clamping assembly 12 to clamp the screw rod 22 and the nut 21 of the bolt 20 .

[0032] The pullable handle 15 is disposed on the holding rod 11 and connected to the other side of the traction rope 14 . The pullable handle 15 can pull the traction rope 14 to allow the clamping assembly 12 to clamp the nut 21 and the screw rod 22 .

[0033] Among them, the pullable handle 15 provides an operating end for the traction rope 14, which is convenient for construction workers to operate and reduces the difficulty of construction.

[0034] The driving assembly 16 is connected to the other end of the holding rod 11 and is connected to the clamping assembly 12. The driving assembly 16 can drive the clamping assembly 12 to drive the nut 21 and the screw rod 22 to be screwed together.

[0035] The driving assembly 16 includes a switch disposed at the handheld end of the holding rod 11, which is used to control the start of the clamping assembly 12, thereby facilitating the operation of construction personnel and reducing the difficulty of construction.

[0036] See also Figure 2 , showing a cross-sectional view of a tool for installing bolts in a narrow space of the present invention. The present invention provides a tool for installing bolts in a narrow space, and the clamping assembly 12 includes: a first connecting rod 121.

[0037] The first connecting rod 121 is configured to be L-shaped or straight-shaped, and can be configured according to actual needs, and is not specifically limited here.

[0038] The screwing assembly has one side connected to the end of the first connecting rod 121, and the screwing assembly is connected to the driving assembly 16, and the screwing assembly rotates under the driving force.

[0039] The screwing assembly is described in detail below and will not be elaborated here.

[0040] The buckle 123 can be clamped with the screw rod 22 . The buckle 123 is arranged on the other side of the screwing assembly. The buckle 123 and the screw rod 22 can rotate integrally.

[0041] There is a groove on the buckle 123 for placing the head of the bolt 20, and the size of the groove matches and corresponds to the size of the bolt 20. The rotation direction of the buckle 123 is the same as the threading direction of the screw rod 22.

[0042] The second connecting rod 122 is arranged opposite to the first connecting rod 121 .

[0043] A second connecting rod 122 is provided to be connected to the holding rod 11 . The second connecting rod 122 may be provided in an L shape to form an installation space relative to the first connecting rod 121 .

[0044] The bracket 124 is connected to the end of the second connecting rod 122 , and the bracket 124 is arranged opposite to the buckle 123 . The bracket 124 can accommodate the nut 21 .

[0045] There is a groove on the tray 124 for placing the nut 21 , and the size of the groove matches and corresponds to the size of the nut 21 .

[0046] In this embodiment, the groove of the bracket 124 is disposed opposite to the groove of the buckle 123 , the nut 21 is disposed against the side wall of the duct flange 32 , and the inner hole of the nut 21 is disposed opposite to the bolt hole 33 .

[0047] The telescopic component is connected between the first connecting rod 121 and the second connecting rod 122 and can be telescopically adjusted to adjust the distance between the first connecting rod 121 and the second connecting rod 122 .

[0048] The telescopic assembly telescopes to adjust the distance between the first connecting rod 121 and the second connecting rod 122 so as to clamp the screw rod 22 passing through the bolt hole 33 with the nut 21 .

[0049] See also Figure 2 , showing a cross-sectional view of a tool for installing bolts in a narrow space of the present invention. The present invention provides a tool for installing bolts in a narrow space, the clamping assembly 12 also includes: a protective cover 125, the protective cover 125 is arranged on the outside of the screwing assembly and the buckle 123.

[0050] The protective cover 125 can be configured as a rectangular cover or an arc-shaped cover, which is not specifically limited here. One side of the protective cover 125 is configured as an opening for the screw rod 22 to extend out, and a perforation is correspondingly provided on the protective cover 125 at the connection between the screw assembly and the first connecting rod 121.

[0051] See also Figure 2 , showing a cross-sectional view of a tool for installing bolts in a narrow space of the present invention. The present invention provides a tool for installing bolts in a narrow space, and the screwing assembly includes: a first transmission shaft 126, the first transmission shaft 126 is connected to the driving assembly 16, and the first transmission shaft 126 is rotated by the driving force.

[0052] The first transmission shaft 126 is connected to the motor of the driving assembly 16 , and the motor can control the start and stop of the rotation of the first transmission shaft 126 .

[0053] In this embodiment, the motor driving time can be set as the effective driving cycle by calculating the threading time of the bolt 20 and the nut 21, and the effective driving cycle is driven once by pressing the switch button on the corresponding holding rod 11. There is no need to manually control the motor driving time, the construction operation is simple, and the construction efficiency is improved.

[0054] The first gear 127 is sleeved on the outside of the first transmission shaft 126 , and the first gear 127 is driven by the first transmission shaft 126 to rotate synchronously.

[0055] The first gear 127 rotates in the same direction as the first transmission shaft 126 . The first transmission shaft 126 is connected to the center of the first gear 127 . The first gear 127 and the first transmission shaft 126 are arranged perpendicularly.

[0056] The second gear 128 is meshed with the first gear 127 and can rotate when receiving force.

[0057] The second gear 128 is disposed on the first gear 127 near the buckle 123 , and the first gear 127 and the second gear 128 are disposed perpendicular to each other.

[0058] The second transmission shaft 129 has one side connected to the second gear 128 and the other side connected to the buckle 123 . The second transmission shaft 129 can drive the buckle 123 and the screw rod 22 connected thereto to rotate together.

[0059] The second transmission shaft 129 is connected to the center of the second gear 128 , and the second gear 128 and the second transmission shaft 129 have the same rotation direction.

[0060] In this embodiment, the length direction of the second rotating shaft is arranged to be consistent with the length direction of the screw rod 22 .

[0061] See also Figure 2 , showing a cross-sectional view of a tool for installing bolts in a narrow space of the present invention. The present invention provides a tool for installing bolts in a narrow space, and the telescopic assembly includes: a first sleeve 1210, one side of the first sleeve 1210 is connected to the end of the first connecting rod 121 away from the screw assembly, and the other side of the first sleeve 1210 is set to be open.

[0062] The first sleeve 1210 is arranged parallel to the second rotation axis.

[0063] The second sleeve 1211 has one side connected to the end of the second connecting rod 122 away from the bracket 124 , and the other side of the second sleeve 1211 is movably connected to the opening of the first sleeve 1210 .

[0064] One end of the second sleeve 1211 can reciprocate at the opening of the first sleeve 1210 .

[0065] The spring 1212 is disposed inside the second sleeve 1211 , and the spring 1212 is compressed by the movement of the first sleeve 1210 .

[0066] Among them, the traction rope 14 pulls the first connecting rod 121 and the first sleeve 1210 to move, changing the distance between the first sleeve 1210 and the second connecting rod 122, and the second sleeve 1211 retracts toward the opening of the first sleeve 1210 and compresses the internal spring 1212, so that the buckle 123 moves toward the direction of the bracket 124, driving the screw 22 to move and engage with the nut 21.

[0067] See also Figure 2 , showing a cross-sectional view of a tool for installing bolts in a narrow space of the present invention. The present invention provides a tool for installing bolts in a narrow space, and a first connecting rod 121 is provided with: a fixing ring 1213, and the fixing ring 1213 is used to position the traction rope 14.

[0068] Among them, the number and setting position of the fixing ring 1213 are not specifically limited here. The traction rope 14 is arranged according to the extension direction of the outer wall of the first connecting rod 121 and the first sleeve 1210, and the traction rope 14 is fixed to the outer wall of the first connecting rod 121 by the fixing ring 1213. The force direction of the traction rope 14 is adjusted according to the arrangement direction of the first connecting rod 121 and the first sleeve 1210.

[0069] See also Figure 2 , showing a cross-sectional view of a tool for installing bolts in a narrow space of the present invention. The present invention provides a tool for installing bolts in a narrow space, wherein a fixing hook 1214 is provided on a clamping assembly 12, and the fixing hook 1214 is used to connect the end of a traction rope 14.

[0070] A fixing hook 1214 is provided on the first connecting rod 121 for hooking and fixing the end of the traction rope 14 to provide a force point for applying force.

[0071] See also Figure 2 , showing a cross-sectional view of a tool for installing bolts in a narrow space of the present invention. The present invention provides a tool for installing bolts in a narrow space, wherein the internal viewing component 13 comprises: a camera 131 , and the camera 131 is connected to the clamping component 12 .

[0072] The camera 131 is disposed in a direction facing the buckle 123 and the card tray 124 .

[0073] A fill light is arranged adjacent to the camera 131 .

[0074] Among them, there may be insufficient light in a narrow space. Using a fill light to fill the camera 131 can improve the clarity of the image captured by the camera 131, reduce the difficulty of construction, and improve construction efficiency.

[0075] See also Figure 1 , showing a schematic diagram of the structure of a tool for installing bolts in a narrow space of the present invention. The present invention provides a tool for installing bolts in a narrow space, wherein the internal viewing assembly 13 further comprises: a display screen 132, which is disposed on the holding rod 11, the display screen 132 is connected to the camera 131, and the display screen 132 is used for people to observe and adjust the position of the extending section on the holding rod 11.

[0076] Among them, the display screen 132 assists in observing the operation status in a narrow space, reduces the difficulty of construction, and improves construction efficiency.

[0077] See also Figure 3 , showing a schematic flow chart of a construction method for installing bolts in a narrow space using a tool according to the present invention. The present invention provides a construction method for installing bolts 20 in a narrow space using a tool, comprising the following steps:

[0078] Execute step S210: connect the upper and lower sections of the air duct 31 in the air shaft 30, and align the bolt holes 33 of the upper and lower air duct flanges 32.

[0079] A plurality of duct flanges 32 need to be arranged on the outer periphery of the upper and lower sections of the duct 31 , and each duct flange 32 needs to be aligned up and down and arranged adjacent to each other, and then, step S220 is executed.

[0080] Execute step S220 : place the nut 21 in the holder 124 of the clamping assembly 12 , and insert the screw rod 22 into the buckle 123 of the clamping assembly 12 .

[0081] Among them, when a washer needs to be set on the nut 21, the washer and the nut 21 can be placed together in the tray 124 during the preliminary preparation work. Due to the elastic force of the spring 1212 inside the second sleeve 1211, the buckle 123 and the tray 124 remain separated, and then, execute step S230.

[0082] Execute step S230: hold the holding rod 11 by hand, and extend the end of the holding rod 11 provided with the clamping assembly 12 into the narrow space between the outer wall of the air duct 31 and the side wall of the air shaft.

[0083] The holding rod 11 can be moved to dock with the bolt holes 33 at different positions, and then step S240 is performed.

[0084] Execute step S240: observe through the inner viewing assembly 13 whether the screw rod 22 clamped by the clamping assembly 12 correctly passes through the bolt holes 33 on the upper and lower air duct flanges 32 .

[0085] In this step, the camera 131 and the fill light need to be turned on to facilitate the construction personnel to observe the position of the bolt hole 33 in the narrow space 40 through the picture on the display screen 132, and then, step S250 is executed.

[0086] Execute step S250: after confirming that the end of the bolt 20 passes through the bolt hole 33, tighten the traction rope 14 through the pullable handle 15 to pull the first connecting rod 121 and the buckle 123 toward the bracket 124, driving the screw rod 22 and the nut 21 to be tightened.

[0087] Among them, the movement of the first connecting rod 121 drives the first sleeve 1210 to overlap the outside of the second sleeve 1211, and compresses the spring 1212 inside the second sleeve 1211. After the force of the traction rope 14 is released, the spring 1212 rebounds and pushes the first sleeve 1210 and the connected first connecting rod 121 and the telescopic assembly to reset, and then executes step S260.

[0088] Execute step S260: start the driving assembly 16 to drive the screwing assembly to rotate to drive the screw rod 22 to rotate, and screw the bolt 20 and the nut 21 together.

[0089] The driving assembly 16 sequentially drives the first transmission shaft 126 , the first gear 127 , the second gear 128 , the second transmission shaft 129 and the buckle 123 to rotate, thereby driving the screw rod 22 to rotate and screw with the nut 21 .

[0090] In this embodiment, if the air shaft 30 is set with concrete walls on both sides, when constructing the air duct 31, the upper and lower air ducts 31 that need to be connected are placed in the air shaft space, and the distance between the outer wall of the air duct 31 and the concrete wall is measured to meet the design requirements. The bolts 20 on both sides of the air duct 31 close to the concrete wall are tightened in turn by installation tools, and then the bolts 20 on both sides of the outside of the air duct 31 are tightened using ordinary hand-held tools, and finally the masonry of the two outer brick walls 50 is completed.

[0091] See also Figure 4, shows a schematic diagram of the structure of the reserved installation holes on the air shaft of the present invention. , If the air shaft 30 is set with concrete walls on three sides, it is necessary to put the upper and lower air ducts 31 that are connected to each other into the air shaft space, and measure the distance between the outer wall of the air duct 31 and the concrete wall to meet the design requirements. The narrow space between the air duct 31 and the concrete wall forms a U-shape, and it is necessary to reserve installation holes 34 at the corners of the concrete wall to facilitate the installation tools to pass through the reserved installation holes 34, extend into the narrow space 40 to tighten the bolts 20 on the side of the innermost concrete wall air duct 31. Multiple installation tools can be set up for simultaneous construction, which can improve construction efficiency, and then use the installation tools to extend into the narrow space 40 to tighten the bolts 20 on the left and right sides of the air duct 31. Then, tighten the bolts 20 on the outside of the air duct 31 using ordinary hand-held tools, and finally complete the masonry of the outer brick wall 50.

[0092] The present invention is described in detail above in conjunction with the embodiments of the drawings. A person skilled in the art can make various changes to the present invention according to the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be the scope defined by the attached claims.

Claims

1. A tool for installing bolts in a narrow space, characterized in that: include: A holding rod, one end of which can be inserted into the narrow space, and the other end can be held and moved to adjust the position of the insertion section of the holding rod to the bolt hole; A clamping assembly, the clamping assembly is connected to the end of the extending section on the holding rod, and the clamping assembly can clamp the nut and the screw of the bolt respectively; An inner viewing assembly, the inner viewing assembly is connected to the holding rod, and the inner viewing assembly is used to display the corresponding positions of the clamping assembly, the bolt, and the bolt hole; A traction rope, wherein the traction rope is arranged along the outer wall of the holding rod, and one side of the traction rope is connected to the clamping assembly; A pullable handle, the pullable handle is arranged on the holding rod and connected to the other side of the traction rope, and the pullable handle can pull the traction rope to allow the clamping assembly to clamp the nut and the screw rod; A driving assembly is connected to the other end of the holding rod, and the driving assembly is connected to the clamping assembly. The driving assembly can drive the clamping assembly to drive the nut and the screw rod to be threadedly connected.

2. A tool for installing bolts in a narrow space according to claim 1, characterized in that: The clamping assembly comprises: First connecting rod; A screwing assembly, one side of which is connected to the end of the first connecting rod, and the screwing assembly is connected to the driving assembly, and the screwing assembly rotates under the driving force; A buckle, the buckle can be clamped with the screw rod, the buckle is arranged on the other side of the screw assembly, and the buckle and the screw rod can rotate together; a second connecting rod, the second connecting rod being arranged opposite to the first connecting rod; A bracket, the bracket is connected to the end of the second connecting rod, the bracket is arranged opposite to the buckle, and the bracket can accommodate the nut; A telescopic component is connected between the first connecting rod and the second connecting rod, and can be telescopically adjusted to adjust the distance between the first connecting rod and the second connecting rod.

3. A tool for installing bolts in a narrow space according to claim 2, characterized in that: The clamping assembly also includes: A protective cover is arranged on the outer sides of the screw assembly and the buckle.

4. A tool for installing bolts in a narrow space according to claim 2, characterized in that: The screwing assembly comprises: A first transmission shaft, the first transmission shaft is connected to the driving assembly, and the first transmission shaft is rotated by the driving force; A first gear, wherein the first gear is sleeved on the outside of the first transmission shaft and the first gear is driven by the first transmission shaft to rotate synchronously; A second gear, the second gear is meshed with the first gear, and the second gear can rotate when subjected to force; A second transmission shaft, one side of the second transmission shaft is connected to the second gear, and the other side is connected to the buckle, and the second transmission shaft can drive the buckle and the screw rod that is clamped to rotate together.

5. A tool for installing bolts in a narrow space according to claim 2, characterized in that: The telescopic assembly comprises: A first sleeve, one side of the first sleeve is connected to an end of the first connecting rod away from the screwing assembly, and the other side of the first sleeve is set to be an opening; A second sleeve, one side of the second sleeve is connected to an end of the second connecting rod away from the card holder, and the other side of the second sleeve is movably connected to an opening of the first sleeve; A spring is arranged inside the second sleeve, and the spring is compressed by the movement of the first sleeve.

6. A tool for installing bolts in a narrow space according to claim 2, characterized in that: The first connecting rod is provided with: A fixing ring is used to position the traction rope.

7. A tool for installing bolts in a narrow space according to claim 1, characterized in that: The clamping assembly is provided with a fixing hook, and the fixing hook is used to connect the end of the traction rope.

8. A tool for installing bolts in a narrow space according to claim 1, characterized in that: The internal viewing component comprises: A camera, wherein the camera is connected to the clamping assembly; A fill light is arranged adjacent to the camera.

9. A tool for installing bolts in a narrow space according to claim 8, characterized in that: The internal viewing component also includes: A display screen is arranged on the holding rod, the display screen is connected to the camera, and the display screen is used for people to observe so as to adjust the position of the extending section on the holding rod.

10. A construction method for installing bolts in a narrow space using a tool, characterized in that: The steps include: Connect the upper and lower sections of the air duct in the air shaft and align the bolt holes of the upper and lower air duct flanges; Place the nut in the holder of the clamping assembly, and insert the bolt into the buckle of the clamping assembly; Holding the holding rod, extend the end of the holding rod on which the clamping assembly is arranged into the narrow space between the outer wall of the air duct and the side wall of the air shaft; Observe through the inner viewing assembly whether the screw rod clamped by the clamping assembly correctly passes through the bolt holes on the upper and lower air duct flanges; After ensuring that the end of the screw rod passes through the bolt hole, the traction rope is tightened by the pullable handle to pull the first connecting rod and the buckle toward the bracket, thereby driving the screw rod and the nut to be pressed together; The driving assembly is started to drive the screwing assembly to rotate so as to drive the bolt to rotate, thereby threading the screw rod and the nut together.

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