Screw type narrow space air pipe flange bolt continuous installation device

Abstract

The utility model discloses a screw type narrow space air pipe flange bolt continuous installation device, and relates to the technical field of ventilation system pipeline installation. The device comprises a nut supply box module, a bolt core module, a bolt supply box module and a device body. The nut supply box module and the bolt supply box module are fixed on the device through fixing holes; the bolt core modules are used in cooperation with the bolt supply box module, and the bolt core modules are tightly arranged in the bolt supply box module in a fixed posture. According to the screw type narrow space air pipe flange bolt continuous installation device, through the combined action of the nut supply box, the bolt supply box and the device body, installation of the air pipe flange bolt in the narrow space is achieved, construction convenience can be effectively improved, installation precision and efficiency are improved, space is conveniently saved, and the screw type narrow space air pipe flange bolt continuous installation device is suitable for popularization and application. And manpower and material resources are saved.

Description

Technical Field

[0001] This utility model relates to the field of ventilation system duct installation technology, specifically a screw-type continuous installation device for flange bolts in confined spaces. Background Technology

[0002] Existing duct installation methods mainly include various connection methods, such as flange connection, spiral overlap, sealing ring connection, locking connection, and riveting connection. Among them, flange connection is the most commonly used method because it is strong, resistant to high and low temperatures, and corrosion, and is widely used in various ventilation systems. However, duct installation also has some shortcomings.

[0003] Firstly, regarding flange connections, air leakage at the interfaces may occur. This is mainly due to oversights during the assembly of flanges, such as substandard flange gasket material, insufficient gasket thickness, excessive allowance at the seam of the duct segments, and inadequate sealing at the seam and flange strip joints. These problems can lead to serious air leakage in the duct system, not only affecting the pass rate of leakage tests but also causing excessive airflow loss, failing to meet design requirements, and resulting in significant energy waste.

[0004] Secondly, flange connections may encounter problems such as excessively small or large flanges, excessively large spacing between bolt or rivet holes, overlapping or cracked seams. These issues will increase system air leakage, energy loss, and affect appearance and functionality. Furthermore, during the installation of angle iron flange ducts, failure to conduct a comprehensive inspection of the ducts and fittings, inadequate on-site inspection, or insufficient preparation of tools and materials can all negatively impact installation quality and subsequent performance.

[0005] Currently, the installation of duct flange bolts is usually discontinuous, following a specific installation sequence and tightening method. Specifically, when installing duct flange bolts, the two flanges should generally be aligned first, then several bolts should be inserted and nuts should be put on, but not tightened immediately. Next, use tools to pry open the bolt holes where no bolts are installed until all bolts are in place. When tightening the bolts, tighten them gradually and evenly in a crisscross pattern to avoid uneven stress on the bolts or leaks at the joints.

[0006] However, the installation methods for duct flange bolts have shortcomings in terms of bolt installation specifications, uniformity of bolt tightening, selection of flange gaskets, and oversights during installation. These shortcomings can affect the tightness and stability of the duct system, leading to problems such as system leakage and excessive airflow loss.

[0007] Therefore, it is particularly necessary to propose a continuous installation device for duct flange bolts that can increase construction convenience, enable continuous installation of duct flange bolts, and ensure installation accuracy and efficiency. Utility Model Content

[0008] This utility model addresses the aforementioned problems of the prior art by proposing a screw-type continuous installation device for flange bolts in confined spaces for air ducts. This device can effectively increase construction convenience, improve installation accuracy and efficiency, save space, and facilitate installation and disassembly, thus saving manpower and resources.

[0009] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0010] A screw-type continuous installation device for flange bolts in confined spaces for ductwork includes a nut supply box module, a bolt core module, a bolt supply box module, and a device body. The nut supply box module and the bolt supply box module are fixed to the device through fixing holes. The bolt core module is used in conjunction with the bolt supply box module, and the bolt core module is tightly arranged in the bolt supply box module in a fixed posture.

[0011] Preferably, the main body of the device consists of a directional rotating top system, a moving drive system, an observation and positioning system, and a device frame; the directional rotating top system consists of a directional rod, a motor, a constant torque bearing, a screw, a one-way rotating bearing, and a cross cone; the moving drive system consists of a motor drive mechanism, a driving magnetic rubber wheel, a driven optical rubber wheel, and a flange support wheel; the observation and positioning system consists of an auxiliary LED light source and an observation reflector.

[0012] Preferably, the directional rod has a directional groove above it and is driven by a motor; the constant torque bearing is located below the directional rod and the motor and is connected to the screw; the screw is located inside the transmission rod, and a reference nut is connected below the transmission rod; a one-way rotating wheel is connected below the reference nut; a lifting spring is tightly connected below the one-way rotating wheel; a cross cone is connected to the bottom of the transmission rod; a diagonal support ring is tightly connected above the cross cone; the motor drive mechanism and the driving magnetic rubber wheel are located inside the device; the driven optical rubber wheel is located at the bottom of the overall device; the flange support wheel is located below the bolt supply box module base; the observation and positioning system is located at the upper left of the bottom of the overall device and forms an inclined surface with the bottom of the overall device.

[0013] Preferably, the nut supply box module and the bolt supply box module are fixedly connected, and a flange angle steel is embedded between the bolt supply box module and the bolt supply box module, and the first and second nut and bolt axes coincide.

[0014] Preferably, the nut supply box module consists of a nut supply box limiting baffle, a nut supply box body, a nut supply box fixing hole, a nut supply box spring compartment, a nut supply box plate-type folding spring, and a nut supply box bottom; the nut inside the nut supply box module is pushed in by a bolt head.

[0015] Preferably, the nut supply box limiting baffle includes a front low-level limiting baffle, a side wall limiting baffle, and a rear high-level limiting baffle, which are fixedly corresponding to the position of the first nut; the nut supply box has a number of fixing holes that are evenly placed above the nut supply box; the nut supply box plate-type folding spring is located in the nut supply box spring compartment and connected to the bottom of the nut supply box; the nut supply box body continuously provides nuts of the same type at relatively fixed positions, and the nuts move along the axial direction toward the opening of the device.

[0016] Preferably, the bolt core module includes an outer cylinder and an inner cylinder from the outside to the inside, and from top to bottom includes an outer cylinder cap, an inner top sealing ring of the outer cylinder, a magnetic inner cylinder sealing ring, a magnetic inner bottom sealing ring of the outer cylinder, and a gasket.

[0017] Preferably, the inner side of the outer cylinder is a square cylinder; the inner side of the inner cylinder is a hexagonal cylinder, and it fits tightly with the outer contour of the bolt head through a one-way inward folding sliding piece; there is a small gap between the inner cylinder and the outer cylinder, and they are kept to rotate freely relative to each other by lubricating oil; the inner cylinder sealing ring is used to temporarily fix the bolt, keeping the bolt and the inner cylinder axis the same; the inner cylinder is fixed by the inner top sealing ring and the inner bottom sealing ring of the outer cylinder, and rotates coaxially with the outer cylinder; the gasket is temporarily fixed to the inner bottom sealing ring of the outer cylinder and placed at the root of the nut.

[0018] Preferably, the bolt supply box module consists of a bolt supply box limiting baffle, a bolt supply box side wall limiting baffle, a bolt supply box body, a bolt supply box spring compartment, a bolt supply box plate-type folding spring, a bolt supply box fixing hole, and a bolt supply box bottom.

[0019] Preferably, the bolt supply box limiting baffle includes a low-level limiting baffle at the front end of the bolt supply box, a high-level limiting baffle at the rear end of the bolt supply box, and a high-level limiting baffle at the top end of the bolt supply box, and is fixedly corresponding to the position of the first bolt core; the bolt supply box has a number of fixing holes that are evenly placed above the bolt supply box; the bolt supply box plate-type folding spring is located in the bolt supply box spring compartment and connected to the bottom of the box; the bolt core module is pushed into the bolt supply box body, and the bolt core module is pushed to the initial position of the original first bolt core module in sequence.

[0020] Therefore, this utility model proposes a screw-type continuous installation device for flange bolts in confined spaces for air ducts, which has the following advantages:

[0021] (1) This device works together with the nut supply box, bolt supply box and the main body of the device, powered by a motor and using a screw structure to push the transmission rod to rotate and push the bolt and nut to connect and tighten, thus realizing the installation of duct flange bolts in a narrow space.

[0022] (2) The magnetic rubber wheel is driven by the motor drive mechanism to drive the driven wheel, so that the device moves along the flange against the outer wall of the air duct. With the help of the LED light source and the observation reflector, the device is positioned and aligned with the next screw hole to complete the continuous installation of the air duct flange bolts.

[0023] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] Figure 1 This is a front view of the overall structure of the screw-type confined space duct flange bolt continuous installation device of this utility model;

[0025] Figure 2 This is a side view of the overall structure of the screw-type confined space duct flange bolt continuous installation device of this utility model;

[0026] Figure 3 This is a front view of the nut supply box module of the screw-type confined space duct flange bolt continuous installation device of this utility model;

[0027] Figure 4 This is a schematic diagram of the back of the nut supply box module of the screw-type confined space duct flange bolt continuous installation device of this utility model;

[0028] Figure 5 This is a schematic elevation view of the nut supply box module of the screw-type confined space duct flange bolt continuous installation device of this utility model;

[0029] Figure 6 This is a side view of the nut supply box module of the screw-type confined space duct flange bolt continuous installation device of this utility model;

[0030] Figure 7 This is a plan view of the bolt core module of the screw-type confined space duct flange bolt continuous installation device of this utility model;

[0031] Figure 8 This is a cross-sectional schematic diagram of the bolt core module of the screw-type confined space duct flange bolt continuous installation device of this utility model;

[0032] Figure 9 This is a plan view of the bolt supply box module of the screw-type confined space duct flange bolt continuous installation device of this utility model;

[0033] Figure 10 This is a bottom view of the bolt supply box module of the screw-type confined space duct flange bolt continuous installation device of this utility model;

[0034] Figure 11This is a schematic elevation view of the bolt supply box module of the screw-type confined space duct flange bolt continuous installation device of this utility model;

[0035] Figure 12 This is a side view of the bolt supply box module of the screw-type confined space duct flange bolt continuous installation device of this utility model.

[0036] Figure Labels

[0037] 1. Directional chute; 2. Directional rod; 3. Motor; 4. Torque bearing; 5. Screw; 6. Reference nut; 7. One-way rotating wheel; 8. Lifting spring; 9. Diagonal support ring; 10. Cross cone; 11. Device frame; 12. Motor drive mechanism; 13. Drive magnetic rubber wheel; 14. Bolt core module; 15. Bolt supply box module; 16. Flange support wheel; 17. Flange angle steel; 18. Auxiliary LED light source; 19. Observation reflector; 20. Nut supply box module; 21. Driven optical rubber wheel; 22. Control cable; 23. Front low-level limit stop; 24. Side wall limit stop; 25. Rear high-level limit stop; 26. Nut supply box body; 27. Nut supply box fixing. 28. Nut supply box spring compartment; 29. ​​Nut supply box plate-type folding spring; 30. Nut supply box bottom; 31. Outer cylinder; 32. Inner cylinder; 33. Outer cylinder cover; 34. Outer cylinder inner top sealing ring; 35. One-way inward folding slide; 36. Inner cylinder sealing ring; 37. Outer cylinder inner bottom sealing ring; 38. Gasket; 39. Bolt supply box front end low-level limiting baffle; 40. Bolt supply box side wall limiting baffle; 41. Bolt supply box top horizontal limiting baffle; 42. Bolt supply box rear end limiting baffle; 43. Bolt supply box body; 44. Bolt supply box spring compartment; 45. Bolt supply box plate-type folding spring; 46. Bolt supply box fixing hole; 47. Bolt supply box bottom; 48. Duct outer wall. Detailed Implementation

[0038] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0040] like Figures 1 to 11As shown, this utility model provides a screw-type continuous installation device for flange bolts in confined spaces, including a nut supply box module 20, a bolt core module 14, a bolt supply box module 15, and a device body. The nut supply box module 20 and bolt supply box module 15 are fixed to the device through fixing holes, and are connected in a fixed position. A flange angle steel 17 is embedded in the middle of the connection, and the axes of the first and second nuts and bolts coincide. The bolt core module 14 works in conjunction with the bolt supply box module 15, and is tightly arranged in a fixed posture within the bolt supply box module 15.

[0041] The main body of the device consists of a directional rotating top system, a moving drive system, an observation and positioning system, and a device frame. The directional rotating top system consists of a directional rod 2, a motor 3, a constant torque bearing 4, a screw 5, a one-way rotating bearing 7, and a cross cone 10; the moving drive system consists of a motor drive mechanism 12, a driving magnetic rubber wheel 13, a driven optical rubber wheel 21, and a flange support wheel 16; the observation and positioning system mainly consists of an auxiliary LED light source 18 and an observation reflector 19.

[0042] A directional slide groove 1 is provided above the directional rod 2 and is driven by a motor 3; a constant torque bearing 4 is connected below the directional rod 2 and the motor 3 and is connected to the screw 5; the screw 5 is located inside the transmission rod, and a reference nut 6 is connected below the transmission rod; a one-way rotating wheel 7 is connected below the reference nut; a lifting spring 8 is tightly connected below the one-way rotating wheel 7; a cross cone 10 is connected to the bottom of the transmission rod; and a diagonal support ring 9 is tightly connected above the cross cone 10.

[0043] The motor drive mechanism 12 and the drive magnetic rubber wheel 13 are located inside the device; the flange support wheel 16 is located below the base of the bolt supply box module 15; the driven optical rubber wheel 21 is located at the bottom of the overall device; the observation and positioning system is located at the upper left of the bottom of the overall device and forms an inclined surface with the bottom of the overall device.

[0044] like Figures 3-6 As shown, the nut supply box module 20 consists of a nut supply box limiting baffle, a nut supply box body 26, a nut supply box fixing hole 27, a nut supply box spring compartment 28, a nut supply box plate-type folding spring 29, and a nut supply box bottom 30.

[0045] The nut supply box limiting baffles include a front low-level limiting baffle 23, a side wall limiting baffle 24, and a rear high-level limiting baffle 25, which are fixedly corresponding to the position of the first nut; the nut supply box fixing holes 27 are a number of holes and are evenly placed on the top of the nut supply box; the nut supply box plate-type folding spring 29 is located in the nut supply box spring compartment 28 and connected to the bottom of the nut supply box 30.

[0046] The nut supply box module 20 continuously provides nuts of the same type at relatively fixed positions inside the nut supply box body 26. Within the same reference system, the same type of nuts are continuously provided at relatively fixed positions, and the nuts can only move along the axial direction toward the opening of the device.

[0047] The working process of the nut supply box 20 module is as follows: the nut supply box 20 module is fixed on this device through the nut supply box fixing hole 27, so that the position of the first nut is fixed; by rotating the bolt head, the first nut moves upward along the nut axis direction in the posture defined by the front low-level limiting baffle 23, the side wall limiting baffle 24 and the rear nut 25.

[0048] When the bottom of the first nut moves beyond the upper plane of the nut supply box 26, the second nut, under the action of the spring, pushes to the exposed bolt head position. When the bolt installation is completed and the device moves backward, the second nut moves to the first position. The nuts inside the box can be pushed to the initial position of the original first nut in sequence, thus completing the function of continuously providing nuts of the same type in a relatively fixed position.

[0049] like Figures 7-8 As shown, the bolt core module allows for simultaneous radial movement and rotation of the bolt along a fixed axis. The bolt core module 14 includes, from the outside in, an outer cylinder 31 and an inner cylinder 32, and from top to bottom, an outer cylinder cover 33, an outer cylinder inner top sealing ring 34, a magnetic inner cylinder sealing ring 36, a magnetic outer cylinder inner bottom sealing ring 37, and a gasket 38.

[0050] The inner side of the outer cylinder 31 is a square cylinder; the inner side of the inner cylinder 32 is a hexagonal cylinder, and it fits tightly with the outer contour of the bolt head through a one-way inward folding slide 35; there is a small gap between the inner cylinder 32 and the outer cylinder 31, and they can rotate freely relative to each other through lubricating oil; the inner cylinder sealing ring 36 is used to temporarily fix the bolt and keep the bolt and the inner cylinder axis are the same; the inner cylinder 32 is fixed by the outer cylinder inner top sealing ring 34 and the outer cylinder inner bottom sealing ring 37, and rotates coaxially with the outer cylinder 31; the gasket 38 is temporarily fixed to the outer cylinder inner bottom sealing ring 37 and placed at the root of the nut.

[0051] A pair of sealing rings on the inner wall of the outer cylinder 31 ensure that the inner cylinder 32 can only rotate coaxially with the outer cylinder within the outer cylinder 31 and cannot move radially; the inner cylinder 32 enables free radial sliding; under the downward force of the cross cone 10, the bolt slides radially downward and remains aligned with the axis of the inner cylinder 32, driving the inner cylinder 32 to rotate, while the outer cylinder 31 remains in a fixed position; when the bolt descends and comes out of the outer cylinder 31, the washer 38 is placed precisely at the root of the nut.

[0052] like Figures 9-12As shown, the bolt supply box module 15 continuously provides bolts of the same type at a fixed position, and ensures that the bolts can only rotate downwards along the axial direction. The bolt supply box module 15 consists of a bolt supply box limiting baffle, a bolt supply box side wall limiting baffle 40, a bolt supply box body 43, a bolt supply box spring compartment 44, a bolt supply box plate-type folding spring 45, a bolt supply box fixing hole 46, and a bolt supply box bottom 47.

[0053] The bolt supply box limiting baffles include a low-level limiting baffle 39 at the front end of the bolt supply box, a high-level limiting baffle 42 at the rear end of the bolt supply box, and a high-level limiting baffle 41 at the top of the bolt supply box, which are fixedly corresponding to the position of the first bolt core; the bolt supply box fixing holes 46 are a number of holes and are evenly placed on the top of the bolt supply box; the bolt supply box plate-type folding spring 45 is located in the bolt supply box spring compartment 44 and connected to the bottom of the box; the bolt core 14 module is pushed into the bolt supply box body 43, and the bolt core module 14 is pushed to the initial position of the original first bolt core module in sequence.

[0054] By rotating and pushing forward with the cross cone 10, the first core module rotates downward along the axis of the core module at the position defined by the low-level limiting baffle 39 at the front end of the bolt supply box, the limiting baffle 40 on the side wall of the bolt supply box, and the rear core module. When the bottom of the first core module moves beyond the low-level limiting baffle 39 at the front end of the bolt supply box, it pops out, and the second core module is pushed to the initial position of the original core module under the action of the spring. The core modules in the box can be pushed to the initial position of the original first core module in sequence, thus completing the function of continuously providing the same type of bolts in a relatively fixed position.

[0055] The overall working process of the screw-type confined space duct flange bolt continuous installation device is as follows:

[0056] 1. Place the device against the duct wall with the first bolt and nut facing the inside of the narrow space, and the flange support wheel close to and located on the upper side of the flange; adjust the support height of the driving magnetic rubber wheel 13 and the driven optical rubber wheel 21 so that the axis of the first nut and bolt is located on the center line of the bolt hole and perpendicular to the flange plane;

[0057] 2. Control the movement of this device to reach the innermost part of the confined space; using the auxiliary LED light source 18 and the observation reflector 19, move this device so that the axis of the first nut and bolt is aligned with the center of the screw hole;

[0058] 3. Start motor 3, the screw rotates, acting on the reference nut 6, causing the cross cone 10 to move downwards, and then slightly press against the cross groove 10 of the bolt head and rotate, causing the bolt to rotate downwards; when it reaches the nut, the nut is lifted due to the rotation of the threads; then the nut and washer are pressed tightly against the flange, at this point the screw threads have disengaged from the reference nut, the cross cone 10 no longer moves downwards, but only rotates and continues to lift the nut; when the nut is tightened, the constant torque bearing 4 begins to idle and makes a "clicking" sound; at this time, start the motor to reverse, lifting... The lifting spring 8 pushes the screw thread into the reference nut 6. Under the action of the one-way rotating wheel 7, the cross cone 10 can only move upward and cannot rotate. Further upward, the inclined support ring 9 hooks the one-way inward folding slide 35, causing the outer shell of the bolt core module 14 to be lifted. When the outer shell of the core module is lifted to the top horizontal baffle 41, the first core module outer shell is pushed out of the bolt box 15 by the second core module, and the second core module is in place. Control the movement of this device, moving backward from the innermost side of the narrow space to the outermost side, the first bolt head moves out of the nut box 20, and the second nut is in place.

[0059] 4. Repeat steps 2-3 to complete the continuous installation of flange bolts for the ductwork in confined spaces.

[0060] Therefore, this utility model of a screw-type continuous installation device for duct flange bolts in confined spaces enables the installation of duct flange bolts in confined spaces, effectively increasing construction convenience, improving installation accuracy and efficiency, saving space, and facilitating installation and disassembly while saving manpower and resources.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A screw-type continuous installation device for flange bolts in confined spaces for air ducts, characterized in that, It includes a nut supply box module, a bolt core module, a bolt supply box module, and a device body; the nut supply box module and the bolt supply box module are fixed to the device through fixing holes; the bolt core module is used in conjunction with the bolt supply box module, and the bolt core module is arranged tightly in the bolt supply box module in a fixed posture.

2. The screw-type continuous installation device for flange bolts in confined spaces as described in claim 1, characterized in that, The main body of the device consists of a directional rotating top system, a moving drive system, an observation and positioning system, and a device frame; the directional rotating top system consists of a directional rod, a motor, a constant torque bearing, a screw, a one-way rotating bearing, and a cross cone; the moving drive system consists of a motor drive mechanism, a driving magnetic rubber wheel, a driven optical rubber wheel, and a flange support wheel; the observation and positioning system consists of an auxiliary LED light source and an observation reflector.

3. The screw-type continuous installation device for flange bolts in confined spaces as described in claim 2, characterized in that, The directional rod is equipped with a directional groove above it and is driven by a motor; the constant torque bearing is located below the directional rod and the motor and is connected to the screw; the screw is located inside the transmission rod, and a reference nut is connected below the transmission rod; a one-way rotating wheel is connected below the reference nut; a lifting spring is tightly connected below the one-way rotating wheel; a cross cone is connected to the bottom of the transmission rod; a diagonal support ring is tightly connected above the cross cone; the motor drive mechanism and the driving magnetic rubber wheel are located inside the device; the driven optical rubber wheel is located at the bottom of the entire device; the flange support wheel is located below the bolt supply box module base; the observation and positioning system is located at the upper left of the bottom of the entire device and forms an inclined surface with the bottom of the entire device.

4. The screw-type confined space duct flange bolt continuous installation device according to claim 1, characterized in that, The nut supply box module and the bolt supply box module are fixedly connected, and a flange angle steel is embedded between the bolt supply box module and the bolt supply box module, and the first and second nuts and bolts have the same axis.

5. The screw-type continuous installation device for flange bolts in confined spaces as described in claim 1, characterized in that, The nut supply box module consists of a nut supply box limiting baffle, a nut supply box body, a nut supply box fixing hole, a nut supply box spring compartment, a nut supply box plate-type folding spring, and a nut supply box bottom; the nut inside the nut supply box module is pushed in by a bolt head.

6. The screw-type continuous installation device for flange bolts in confined spaces as described in claim 5, characterized in that, The nut supply box limiting baffles include a front low-level limiting baffle, a side wall limiting baffle, and a rear high-level limiting baffle, which are fixedly corresponding to the position of the first nut; the nut supply box has a number of fixing holes that are evenly placed on top of the nut supply box; the nut supply box plate-type folding spring is located in the nut supply box spring compartment and connected to the bottom of the nut supply box; the nut supply box body continuously provides nuts of the same type at relatively fixed positions, and the nuts move along the axial direction toward the opening of the device.

7. The screw-type confined space duct flange bolt continuous installation device according to claim 1, characterized in that, The bolt core module includes, from the outside in, an outer cylinder and an inner cylinder, and from top to bottom, an outer cylinder cap, an inner top sealing ring of the outer cylinder, a magnetic inner cylinder sealing ring, a magnetic inner bottom sealing ring of the outer cylinder, and a gasket.

8. The screw-type continuous installation device for flange bolts in confined spaces as described in claim 7, characterized in that, The outer cylinder has a square inner side; the inner cylinder has a hexagonal inner side and fits tightly with the outer contour of the bolt head through a one-way inward folding sliding piece; there is a small gap between the inner and outer cylinders, and they are kept to rotate freely relative to each other by lubricating oil; the inner cylinder sealing ring is used to temporarily fix the bolt and keep the bolt and the inner cylinder axis aligned; the inner cylinder is fixed by the inner top sealing ring and the inner bottom sealing ring of the outer cylinder and rotates coaxially with the outer cylinder; the gasket is temporarily fixed to the inner bottom sealing ring of the outer cylinder and placed at the root of the nut.

9. The screw-type continuous installation device for flange bolts in confined spaces as described in claim 1, characterized in that, The bolt supply box module consists of a bolt supply box limiting baffle, a bolt supply box side wall limiting baffle, a bolt supply box body, a bolt supply box spring compartment, a bolt supply box plate-type folding spring, a bolt supply box fixing hole, and a bolt supply box bottom.

10. The screw-type continuous installation device for flange bolts in confined spaces according to claim 9, characterized in that, The bolt supply box limiting baffles include a low-level limiting baffle at the front end of the bolt supply box, a high-level limiting baffle at the rear end of the bolt supply box, and a high-level limiting baffle at the top of the bolt supply box, which are fixedly corresponding to the position of the first bolt core; the bolt supply box has a number of fixing holes that are evenly placed above the bolt supply box; the bolt supply box plate-type folding spring is located in the bolt supply box spring compartment and connected to the bottom of the box; the bolt core module is pushed into the bolt supply box body, and the bolt core module is pushed to the initial position of the original first bolt core module in sequence.

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