A confined space flange bolt tightening tool

Abstract

The present invention relates to the technical field of mechanical tools, and discloses a confined space flange bolt tightening tool, comprising a gear wrench, a support arm, and an auxiliary arm. The gear wrench comprises a cover body and a gear set, the gear set being mounted inside the cover body, the support arms being two movably mounted on the top of the cover body, the tail ends of the support arms being provided with adjustable jackets, and the lower end of the cover body being hinged to the auxiliary arm. The present invention can be used for the installation and removal of confined space flange bolts. The installation and removal force is extended to the outside of the flange group through gear transmission, thereby expanding the installation and removal working space of the nut. The present invention has good use effect and is easy to move. It can be performed by one person, is highly efficient, and saves manpower and material resources.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical tools, and in particular to a flange bolt fastening tool for a confined space. Background Art

[0002] During pipeline inspection and maintenance at petrochemical plants, flange bolts often need to be installed and removed. Due to the large number of pipelines within the plant area, many flanges require limited removal space and use stud bolts, making bolt installation and removal difficult. Electric and pneumatic tools are generally large, limiting their use in confined spaces. Currently, open-end, ring-shaped, or ratchet wrenches are commonly used. To prevent shaft rotation, these tools typically require two people to perform the installation and removal work. Consequently, existing installation and removal methods and tools waste manpower and resources, are time-consuming, and have low work efficiency. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a confined space flange bolt tightening tool.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a confined space flange bolt tightening tool, characterized in that: it includes a gear wrench, a support arm and an auxiliary arm, the gear wrench includes a cover body and a gear set, the gear set includes an open gear, an auxiliary wheel and a driving wheel, the auxiliary wheels are two, and the two auxiliary wheels are respectively meshed with the driving wheel and the open gear, the gear set is installed inside the cover body, the front end of the cover body is provided with a plug-in interface, the open gear is provided at the plug-in interface, the top of the central axis of the driving wheel passes through the top of the cover body, the central axes of the two auxiliary wheels are rotatably connected to the cover body, the bottom of the central axis of the driving wheel is rotatably connected to the cover body, a wrench head is movably inserted inside the open gear, the support arms are two, respectively movably installed on the top of the cover body and located at both ends of the plug-in interface, the tail end of the support arm is provided with an adjustable sleeve, the lower end of the cover body is hinged to the auxiliary arm, the auxiliary arm includes a telescopic connecting rod and an adjustable open-end wrench, the upper end of the telescopic connecting rod is hinged to the cover body, and the lower end is hinged to the adjustable open-end wrench.

[0005] Furthermore; the cover body is formed by connecting an upper cover and a lower cover, the gear set is located in a cavity enclosed by the upper cover and the lower cover, the inner wall of the upper cover is respectively provided with two grooves and a through hole, and the inner wall of the lower cover is provided with three grooves, the upper and lower ends of the central axes of the two auxiliary wheels are respectively rotatably connected with the upper cover groove and the corresponding lower cover groove, the upper end of the central axis of the driving wheel passes through the through hole of the upper cover, and the lower end is rotatably connected with the corresponding lower cover groove.

[0006] Furthermore, the support arm head end is provided with a rectangular slot, the top of the upper cover is provided with two screws, the two screws are movably inserted in the slots of the two support arms and fixed by fastening nuts.

[0007] Furthermore, a fixing seat is provided at the lower end of the cover body, and the upper end of the telescopic connecting rod is hinged to the fixing seat.

[0008] Furthermore, the adjustable clip includes a fixed clip and a movable clip, the fixed clip is connected to the tail end of the support arm and is integrally formed with the tail end of the support arm, and the movable clip is movably sleeved on the support arm.

[0009] Furthermore, the top cross-section of the central axis of the driving wheel is a quadrilateral.

[0010] Beneficial effects of the present invention:

[0011] (1) The present invention can be used for the installation and removal of flange bolts in a confined space. The installation and removal force is extended to the outside of the flange assembly through gear transmission, thereby expanding the installation and removal working space of the nut.

[0012] (2) The wrench head is movably connected to the open gear, which makes it easy to replace the wrench head to adapt to nuts of different specifications to meet different usage scenarios and improve the service life of the invention.

[0013] (3) The design of the support arm can achieve a stable support effect on the gear wrench. The design of the rectangular slide groove at the head end can adjust the outward extension length of the support arm. The design of the adjustable sleeve at the tail end can clamp nuts of different sizes.

[0014] (4) The design of the auxiliary arm can fix the nut at the lower end of the stud bolt. Its function is to prevent the lower end nut from rotating along with the stud bolt when the gear wrench applies force to the nut at the upper end of the stud bolt.

[0015] (5) The present invention has good use effect and is easy to move. It can be done by one person, is highly efficient, and saves manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present invention;

[0017] Figure 2 Exploded diagram of the present invention.

[0018] In the figure: 1. Gear wrench; 11. Upper cover; 12. Lower cover; 13. Open gear; 14. Driving wheel; 15. Auxiliary wheel; Wrench head 16; 2. Support arm; 21. Fixed clamp; 22. Moving clamp; 23. Slide; 24. Fastening nut; 3. Auxiliary arm; 31. Telescopic connecting rod; 32. Adjustable open-end wrench; 33. Fixed seat; 4. Flange. DETAILED DESCRIPTION

[0019] Example:

[0020] like Figure 1 and Figure 2 As shown, a confined space flange bolt tightening tool is characterized in that it includes a gear wrench 1, a support arm 2 and an auxiliary arm 3, the gear wrench 1 includes a cover body and a gear set, the cover body is connected by an upper cover 11 and a lower cover 12, the gear set is located in a cavity enclosed by the upper cover 11 and the lower cover 12, the gear set includes an open gear 13, an auxiliary wheel 15 and a driving wheel 14, there are two auxiliary wheels 15, the two auxiliary wheels 15 are respectively meshed with the driving wheel 14 and the open gear 13, the front end of the cover body is provided with a plug interface, and the rear end is provided with a handle, the open gear 13 is provided at the plug interface, the inner wall of the upper cover 11 is respectively provided with two grooves and a through hole, the inner wall of the lower cover 12 is provided with three grooves, and the upper and lower ends of the central axes of the two auxiliary wheels 15 are respectively rotatably connected with the two grooves of the upper cover 11 and the corresponding grooves of the lower cover 12 The upper end of the central axis of the driving wheel 14 passes through the through hole of the upper cover 11, and the lower end is rotatably connected to the corresponding groove of the lower cover 12. A wrench head 16 is movably inserted inside the open gear 13, and the wrench head 16 is replaceable to adapt to nuts of different specifications. The support arm 2 is composed of two movably mounted on the top of the upper cover 11 and located at both ends of the plug interface. The tail end of the support arm 2 is provided with an adjustable sleeve, and the adjustable sleeve includes a fixed clamp 21 and a movable clamp 22. The fixed clamp 21 connects the tail end of the support arm 2 and is integrally formed with the tail end of the support arm 2. The movable clamp 22 movably sleeves the support arm 2. The lower end of the lower cover 12 is provided with a fixed seat 33 and the auxiliary arm 3 is hinged through the fixed seat 33. The auxiliary arm 3 includes a telescopic connecting rod 31 and an adjustable open-end wrench 32. The upper end of the telescopic connecting rod 31 is hinged to the fixed seat 33, and the lower end is hinged to the adjustable open-end wrench 32.

[0021] Preferably, in this embodiment, a rectangular slot 23 is provided at the head end of the support arm 2 , and two screws are provided on the top of the upper cover 11 . The two screws are movably inserted into the slots 23 of the two support arms 2 and fixed by fastening nuts 24 .

[0022] Preferably, in this embodiment, the cross-section of the top of the central axis of the driving wheel 14 is a quadrilateral.

[0023] Working principle: First, the staff needs to confirm the specifications of the bolts in the flange 4 to be disassembled and assembled on site, determine the size of the wrench head 16 and replace it, then hold the gear wrench 1 so that the wrench head 16 is stuck on the double-headed bolt nut that needs to be installed or disassembled, then move the adjustment support arm 2 to extend outward so that the adjustable sleeves at the rear end of the support arm 2 are respectively stuck on the corresponding nuts on both sides, adjust the movable clamp 22 to clamp the nut, and then tighten the fastening nut 24 to fix the support arm 2, thereby fixing the gear wrench 1. When the disassembly nut is rotated by applying force to the nut, the gear wrench 1 will not shake or shift. Then adjust the length of the telescopic connecting rod 31 so that the adjustable open-end wrench 32 can be stuck on the corresponding nut under the double-headed bolt, adjust the adjustment knob on the adjustable open-end wrench 32 so that the adjustable open-end wrench 32 clamps the corresponding nut, and finally use an electric or pneumatic wrench to apply force to the driving wheel 14 so that it rotates and drives the open gear 13 to rotate through the auxiliary wheel 15, thereby achieving the installation or disassembly of the nut.

[0024] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

[0025] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

Claims

1. A confined space flange bolt tightening tool, characterized by: The gear wrench comprises a cover body and a gear set, the gear set comprises an open gear, an auxiliary wheel and a driving wheel, the auxiliary wheels are two, and the two auxiliary wheels are respectively meshed with the driving wheel and the open gear, the gear set is installed inside the cover body, the front end of the cover body is provided with a plug interface, the open gear is provided at the plug interface, the top of the central axis of the driving wheel passes through the top of the cover body, the central axes of the two auxiliary wheels are rotatably connected to the cover body, the bottom of the central axis of the driving wheel is rotatably connected to the cover body, a wrench head is movably inserted inside the open gear, the support arms are two movably mounted on the top of the cover body and located at both ends of the plug interface, the tail end of the support arm is provided with an adjustable sleeve, the lower end of the cover body is hinged to the auxiliary arm, the auxiliary arm comprises a telescopic connecting rod and an adjustable open-end wrench, the upper end of the telescopic connecting rod is hinged to the cover body, and the lower end is hinged to the adjustable open-end wrench.

2. The confined space flange bolt tightening tool according to claim 1, characterized in that: The cover body is formed by connecting an upper cover and a lower cover, and the gear set is located in a cavity enclosed by the upper cover and the lower cover. The inner wall of the upper cover is respectively provided with two grooves and a through hole, and the inner wall of the lower cover is provided with three grooves. The upper and lower ends of the central axes of the two auxiliary wheels are respectively rotatably connected to the upper cover grooves and the corresponding lower cover grooves. The upper end of the central axis of the driving wheel passes through the through hole of the upper cover, and the lower end is rotatably connected to the corresponding lower cover groove.

3. The confined space flange bolt tightening tool according to claim 2, characterized in that: A rectangular sliding groove is provided at the head end of the support arm, and two screw rods are provided at the top of the upper cover. The two screw rods are movably inserted into the sliding grooves of the two support arms and fixed by fastening nuts.

4. The confined space flange bolt tightening tool according to claim 1, characterized in that: A fixing seat is provided at the lower end of the cover body, and the upper end of the telescopic connecting rod is hinged to the fixing seat.

5. The confined space flange bolt tightening tool according to claim 1, characterized in that: The adjustable clip includes a fixed clip and a movable clip. The fixed clip is connected to the rear end of the support arm and is integrally formed with the rear end of the support arm. The movable clip is movably sleeved on the support arm.

6. The confined space flange bolt tightening tool according to claim 1, characterized in that: The top cross section of the central axis of the driving wheel is a quadrilateral.

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