Fastening device for connecting vertical shaft air pipe bolts in narrow and small space

Abstract

The utility model discloses a fastening device for connecting a vertical shaft air pipe bolt in a narrow space, and relates to the technical field of fastening devices. The fastening device for connecting the vertical shaft air pipe bolts in the narrow and small space comprises a hollow fixing rod, an extension rod, an operation rotating disc, a placing frame, a first magnetic block, a bolt sleeve head and a limiting disc which are arranged on a fastening device body, and the top of the limiting disc is connected with a moving ring through a reset mechanism; and the side wall of the extension rod is sleeved with the moving ring, and the moving ring is rotationally connected with the extension rod, and a driving mechanism used for rotating the extension rod is arranged at the top of the limiting disc. According to the fastening device for connecting the vertical shaft air pipe bolts in the narrow and small space, an operator can operate by standing on each floor on the side edge of the air pipe without standing above a shaft way during construction, and in the screwing process, under the action of a first spring, a bolt body can abut against a nut all the time, so that the operation is convenient, and the labor intensity of the operator is reduced. Therefore, fastening is more convenient and faster, and efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of fastening devices, in particular to a fastening device used for bolt connection of vertical shaft air ducts in a narrow space. Background Art

[0002] In super high-rise buildings, vertical pipes such as fresh air ducts, ventilation ducts, fire-fighting pressurized air supply ducts and fire-fighting smoke exhaust ducts are usually installed. The above-mentioned vertical pipes are collectively referred to as shaft ducts. The main function of shaft ducts is ventilation. With the implementation of the new fire protection design specifications, ventilation system design requires that ventilation shafts in buildings be lined with air ducts. However, due to structural limitations of super high-rise buildings, it is not allowed to design the cross-section of the shaft to be larger, resulting in a distance of less than 5 cm between the outer wall of the shaft duct and the shaft wall. In actual projects, it is often encountered that one or two side walls of the ventilation shaft are concrete cast-in-place walls, resulting in the problem that the air ducts close to the structural wall, especially the air ducts with longer sides and narrow space, cannot be tightened with connection bolts. At this time, a special fastening device is required to tighten the bolts.

[0003] Publication number CN216991675U discloses a fastening device for bolting air ducts in narrow spaces, comprising a hollow fixing rod, an extension rod being slidably connected to the inner wall of the hollow fixing rod, an operating turntable being fixedly mounted on the top end of the extension rod, and a bolt sleeve being fixedly mounted on the bottom end of the extension rod, a bolt body being provided inside the bolt sleeve, a placement frame being fixedly mounted on the outer surface of the hollow fixing rod, and a first magnetic block corresponding to the bolt body being fixedly mounted on the inner wall of the placement frame. The fastening device for bolt connection of vertical shaft air ducts in a narrow space is provided with a hollow fixing rod, an extension rod, an operating turntable, a bolt sleeve, a bolt body, a placement frame, a first magnetic block, a nut and a second magnetic block, so that the device can achieve the purpose of quickly bolting the vertical shaft air duct in the narrow space between the outer wall of the vertical shaft air duct and the vertical shaft wall during actual use. The device is simple to operate, low in cost, easy to carry, and suitable for vigorous promotion in the market. However, when using the existing fastening device for bolt connection of vertical shaft air ducts in a narrow space, it is not only necessary to rotate the extension rod by the operating turntable, but also to push the extension rod with force so that it can drive the bolt sleeve and the bolt body to move in the direction close to the nut, and to create an extrusion pressure between the bolt body and the nut. In addition, the operator is required to stand above the shaft to operate, which is not convenient and fast enough and affects the fastening efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a fastening device for bolt connection of vertical shaft air ducts in a narrow space, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a fastening device for bolting air ducts in a narrow space, comprising a hollow fixing rod, an extension rod, an operating turntable, a placement frame, a first magnetic block, a bolt sleeve, and a limit plate, wherein the top of the limit plate is connected to a movable ring via a reset mechanism, and the movable ring is sleeved on the side wall of the extension rod and rotatably connected thereto, and the top of the limit plate is provided with a driving mechanism for rotating the extension rod;

[0006] The reset mechanism includes two symmetrically arranged first T-shaped guide rods fixedly connected to the top of the limit plate, and the side walls of the first T-shaped guide rods are provided with sliders, the sliders are fixed to the side walls of the movable ring, and the side walls of each first T-shaped guide rod are provided with first springs, the two ends of the first springs are respectively fixed to the limit plate and the sliders, and the top of the first T-shaped guide rods is provided with a limiting mechanism for limiting the sliders.

[0007] Preferably, the limiting mechanism includes a limiting hole provided on the side wall of the slider, and the top of the first T-shaped guide rod is connected to a moving block via a moving mechanism, and the side wall of the moving block is fixedly connected to the limiting rod.

[0008] Preferably, the moving mechanism includes a fixed plate fixedly connected to the top of the first T-shaped guide rod, and the side walls of the fixed plate are fixedly connected to two symmetrically arranged second T-shaped guide rods, the side walls of the second T-shaped guide rods are sleeved with connecting blocks, and the moving block is fixed to the bottom of the connecting block, and a reset assembly is provided between the connecting block and the fixed plate.

[0009] Preferably, the reset mechanism includes a second spring sleeved on the side wall of the second T-shaped guide rod, and two ends of the second spring are respectively fixed to the fixing plate and the connecting block.

[0010] Preferably, the driving mechanism includes a sleeve sleeved on the side wall of the extension rod, and the lower end of the sleeve is rotatably connected to the top of the limit plate, a guide mechanism is provided between the sleeve and the extension rod, and the side wall of the sleeve is fixedly sleeved with a driven bevel gear, the top of the limit plate is fixedly connected to the support plate, and the side wall of the support plate is rotatably connected to the active bevel gear through a rotating shaft, the active bevel gear is meshed with the driven bevel gear, and one end of the rotating shaft is fixedly connected to a rocker.

[0011] Preferably, the guide mechanism comprises a guide groove provided on the side wall of the extension rod, a guide block is slidably connected in the guide groove, and the guide block is fixed to the inner side wall of the sleeve.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] (1) This fastening device for bolt connection of vertical shaft air duct in narrow space is provided with a reset mechanism, a limit mechanism and a driving mechanism. When in use, the connecting block is first pulled to move it in the direction away from the fixed plate. At the same time, the second spring is stretched and the limit rod is driven to move by the moving block. Then, the extension rod and the bolt sleeve are pulled upward by the operating turntable. At the same time, when the extension rod moves upward, the slider is driven to move upward along the first T-shaped guide rod by the moving ring, and the first spring is gradually stretched. When the slider moves to the top of the first T-shaped guide rod, the connecting block is loosened. At this time, the connecting block can be moved and reset in the direction close to the fixed plate under the action of the second spring. At the same time, the limit rod is driven to move by the moving block and inserted into the limit hole for limiting, so that the slider and the moving ring can be limited, and then the extension rod can be limited. Then, the bolt body is fixed to the inside of the bolt sleeve by the second magnetic block, and the nut is fixed in the first The first spring forces the bolt body to move downwardly along the guide rail, and the first spring forces the bolt body and the nut to move downwardly, thereby locking the bolt body and the nut in the locking position.

[0014] (2) This type of fastening device for bolt connection of vertical shaft air ducts in narrow spaces is provided with a driving mechanism, etc., and when tightening and fixing, the rocker is rotated. The rotation of the rocker drives the rotation of the rotating shaft and the active bevel gear, and then drives the rotation of the driven bevel gear and the sleeve, and then drives the extension rod to rotate through the guide mechanism, and then drives the bolt sleeve and the bolt body to rotate. At the same time, when the extension rod moves downward, the guide block can slide in the guide groove to achieve the tightening operation, so that the operator does not need to stand above the shaft to operate during construction, but can stand on each floor slab on the side of the air duct to operate, which is more convenient, faster and more efficient. In addition, since the number of teeth of the active bevel gear is less than that of the driven bevel gear, the torque of the extension rod can be increased, ensuring the efficiency and effect of tightening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the overall structure of the utility model from another perspective;

[0017] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0018] Figure 4 for Figure 2 Schematic diagram of the enlarged structure at B in the middle;

[0019] Figure 5 for Figure 3 Schematic diagram of the enlarged structure at C in the middle;

[0020] Figure 6 for Figure 4 Schematic diagram of the enlarged structure at point D in the middle.

[0021] In the figure: 1. Fastening device body; 101. Hollow fixed rod; 102. Extension rod; 103. Operating turntable; 104. Placement frame; 105. First magnetic block; 106. Bolt sleeve; 107. Limiting plate; 201. Limiting hole; 202. Moving block; 203. Limiting rod; 301. Fixed plate; 302. Second T-shaped guide rod; 303. Connecting block; 4. Second spring; 501. Sleeve; 502. Driven bevel gear; 503. Support plate; 504. Rotating shaft; 505. Active bevel gear; 506. Rocker; 601. Guide groove; 602. Guide block; 7. Moving ring; 801. First T-shaped guide rod; 802. Sliding block; 803. First spring; 9. Bolt body; 10. Nut. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figures 1-6The present invention provides a technical solution: a fastening device for bolting air ducts in a narrow space, comprising a hollow fixing rod 101, an extension rod 102, an operating dial 103, a placement frame 104, a first magnetic block 105, a bolt sleeve 106 and a limit plate 107 arranged on a fastening device body 1, a second magnetic block being arranged in the bolt sleeve 106, which is a well-known technology in the technical field and will not be repeated here. The top of the limit plate 107 is connected to a movable ring 7 through a reset mechanism, and the movable ring 7 is sleeved on the side wall of the extension rod 102 and rotatably connected thereto, and the top of the limit plate 107 is provided with a driving mechanism for rotating the extension rod 102;

[0024] The reset mechanism includes two symmetrically arranged first T-shaped guide rods 801 fixedly connected to the top of the limit plate 107, and the side walls of the first T-shaped guide rods 801 are sleeved with sliders 802, and the sliders 802 are fixed to the side walls of the movable ring 7, and the side walls of each first T-shaped guide rod 801 are sleeved with first springs 803, and the two ends of the first spring 803 are respectively fixed to the limit plate 107 and the sliders 802, and the top of the first T-shaped guide rod 801 is provided with a limiting mechanism for limiting the sliders 802. During construction, the operator does not need to stand above the well to operate, but can operate by standing on each floor slab on the side of the air duct. Moreover, during the tightening process, under the action of the first spring 803, the bolt body 9 can always be against the nut 10, thereby making the tightening more convenient, quick and efficient.

[0025] When the slider 802 moves to the top of the first T-shaped guide rod 801, the limiting rod 203 is inserted into the limiting hole 201 under the action of the moving mechanism to limit the slider 802 and the moving ring 7, thereby limiting the extension rod 102.

[0026] The moving mechanism includes a fixed plate 301 fixedly connected to the top of the first T-shaped guide rod 801, and the side wall of the fixed plate 301 is fixedly connected to two symmetrically arranged second T-shaped guide rods 302, the side wall of the second T-shaped guide rod 302 is sleeved with a connecting block 303, and the moving block 202 is fixed to the bottom of the connecting block 303, and a reset assembly is provided between the connecting block 303 and the fixed plate 301, pulling the connecting block 303 to move it away from the fixed plate 301, and the limiting rod 203 is driven to move by the moving block 202.

[0027] The reset mechanism includes a second spring 4 sleeved on the side wall of the second T-shaped guide rod 302 , and both ends of the second spring 4 are fixed to the fixing plate 301 and the connecting block 303 respectively, guiding and resetting the movement of the connecting block 303 .

[0028] The driving mechanism includes a sleeve 501 sleeved on the side wall of the extension rod 102, and the lower end of the sleeve 501 is rotatably connected to the top of the limit plate 107. A guide mechanism is provided between the sleeve 501 and the extension rod 102, and the side wall of the sleeve 501 is fixedly sleeved with a driven bevel gear 502. The top of the limit plate 107 is fixedly connected to a support plate 503, and the side wall of the support plate 503 is rotatably connected to a driving bevel gear 505 through a rotating shaft 504. The driving bevel gear 505 It is meshed with the driven bevel gear 502, and one end of the rotating shaft 504 is fixedly connected to a rocking wheel 506. When tightening, the rocking wheel 506 is rotated, and the rotation of the rocking wheel 506 drives the rotation of the rotating shaft 504 and the active bevel gear 505, and then drives the rotation of the driven bevel gear 502 and the sleeve 501, and then drives the extension rod 102 to rotate through the guide mechanism, and then drives the bolt sleeve 106 and the bolt body 9 to rotate, thereby realizing the tightening operation.

[0029] The guide mechanism includes a guide groove 601 provided on the side wall of the extension rod 102, and a guide block 602 is slidably connected in the guide groove 601, and the guide block 602 is fixed to the inner wall of the sleeve 501, ensuring that when the extension rod 102 moves, the guide block 602 can slide in the guide groove 601, ensuring that when the sleeve 501 rotates, it can drive the extension rod 102 to rotate.

[0030] When the extension rod 102 is moved upward, the slider 802 is driven by the moving ring 7 to move upward along the first T-shaped guide rod 801, and the first spring 803 is gradually stretched. When the slider 802 moves to the top of the first T-shaped guide rod 801, the connecting block 303 is released. At this time, the connecting block 303 can be reset in the direction close to the fixed plate 301 under the action of the second spring 4. At the same time, the limiting rod 203 is driven by the moving block 202 to move and insert the limiting rod 203 into the limiting hole 201 for limiting, so that the slider 802 and the moving ring 7 can be limited, and then the extension rod 102 is limited.

[0031] Next, the bolt body 9 is fixed to the inside of the bolt sleeve 106 through the second magnetic block, and the nut 10 is fixed to the first magnetic block 105. Next, the hollow fixing rod 101 is placed between the outer wall of the vertical shaft air duct and the vertical shaft wall, so that the part to be bolted is located inside the placement frame 104. Then, the connecting block 303 is pulled away from the fixing plate 301, and the limiting rod 203 is withdrawn from the limiting hole 201. At this time, the extension rod 102 and the moving ring 7 are no longer limited. Under the action of the first spring 803, the slider 802 moves downward along the first T-shaped guide rod 801, and drives the moving ring 7 and the extension rod 102 to move downward, thereby driving the extension rod 102 and the bolt sleeve 106 to move downward, so that the bolt body 9 can pass through the connection part and abut against the nut 10.

[0032] Finally, the crank 506 is rotated, and the rotation of the crank 506 drives the rotation of the rotating shaft 504 and the active bevel gear 505, thereby driving the rotation of the driven bevel gear 502 and the sleeve 501, and then driving the extension rod 102 to rotate through the guide mechanism, thereby driving the bolt sleeve 106 and the bolt body 9 to rotate. At the same time, when the extension rod 102 moves downward, the guide block 602 can slide in the guide groove 601, so that it can be locked with the nut 10, thereby achieving the purpose of quickly bolting the vertical shaft air duct in the narrow space between the outer wall of the vertical shaft air duct and the vertical shaft wall. During construction, the operator does not need to stand above the shaft to operate, but can stand on each floor slab on the side of the air duct to operate, which is more convenient, faster and more efficient. In addition, since the number of teeth of the active bevel gear 505 is less than that of the driven bevel gear 502, the torque of the extension rod 102 can be increased, ensuring the efficiency and effect of tightening.

[0033] Furthermore, during the tightening process, under the action of the first spring 803 , the bolt body 9 can always abut against the nut 10 , thereby making the tightening more convenient, faster and more efficient.

Claims

1. A fastening device for bolt connection of vertical shaft air duct in a narrow space, comprising a hollow fixing rod (101), an extension rod (102), an operating turntable (103), a placement frame (104), a first magnetic block (105), a bolt sleeve (106) and a limit plate (107) arranged on a fastening device body (1), characterized in that: The top of the limiting plate (107) is connected to a moving ring (7) via a reset mechanism, and the moving ring (7) is sleeved on the side wall of the extension rod (102) and rotatably connected thereto, and the top of the limiting plate (107) is provided with a driving mechanism for rotating the extension rod (102); The reset mechanism comprises two symmetrically arranged first T-shaped guide rods (801) fixedly connected to the top of the limiting plate (107), and the side walls of the first T-shaped guide rods (801) are sleeved with sliders (802), the sliders (802) are fixed to the side walls of the movable ring (7), and the side walls of each first T-shaped guide rod (801) are sleeved with first springs (803), the two ends of the first springs (803) are respectively fixed to the limiting plate (107) and the sliders (802), and the tops of the first T-shaped guide rods (801) are provided with limiting mechanisms for limiting the sliders (802).

2. A fastening device for bolt connection of vertical shaft air ducts in narrow spaces according to claim 1, characterized in that: The limiting mechanism comprises a limiting hole (201) provided on the side wall of the slider (802), and the top of the first T-shaped guide rod (801) is connected to a moving block (202) via a moving mechanism, and the side wall of the moving block (202) is fixedly connected to a limiting rod (203).

3. The fastening device for bolt connection of vertical shaft air ducts in narrow spaces according to claim 2, characterized in that: The moving mechanism comprises a fixed plate (301) fixedly connected to the top of a first T-shaped guide rod (801), and the side wall of the fixed plate (301) is fixedly connected to two symmetrically arranged second T-shaped guide rods (302), the side wall of the second T-shaped guide rod (302) is sleeved with a connecting block (303), and the moving block (202) is fixed to the bottom of the connecting block (303), and a reset component is provided between the connecting block (303) and the fixed plate (301).

4. The fastening device for bolt connection of vertical shaft air ducts in narrow spaces according to claim 3, characterized in that: The reset mechanism comprises a second spring (4) sleeved on the side wall of the second T-shaped guide rod (302), and two ends of the second spring (4) are respectively fixed to the fixing plate (301) and the connecting block (303).

5. The fastening device for bolt connection of vertical shaft air ducts in narrow spaces according to claim 1, characterized in that: The driving mechanism comprises a sleeve (501) sleeved on the side wall of the extension rod (102), and the lower end of the sleeve (501) is rotatably connected to the top of the limit plate (107), a guide mechanism is provided between the sleeve (501) and the extension rod (102), and a driven bevel gear (502) is fixedly sleeved on the side wall of the sleeve (501), the top of the limit plate (107) is fixedly connected to a support plate (503), and the side wall of the support plate (503) is rotatably connected to a driving bevel gear (505) via a rotating shaft (504), the driving bevel gear (505) is meshed with the driven bevel gear (502), and one end of the rotating shaft (504) is fixedly connected to a rocking wheel (506).

6. The fastening device for bolt connection of vertical shaft air ducts in narrow spaces according to claim 5, characterized in that: The guide mechanism comprises a guide groove (601) provided on the side wall of the extension rod (102), a guide block (602) is slidably connected in the guide groove (601), and the guide block (602) is fixed to the inner side wall of the sleeve (501).

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