Pneumatic inverted-penetrating bolt mounting tool

By designing pneumatic rewinding bolt installation tooling, the three-jaw chuck device and cylinder system are used to realize single-person operation and safe screwing of double-head studs, which solves the operation difficulties and risks of high-weight stud assembly and improves assembly efficiency and security.

CN222308734UActive Publication Date: 2025-01-07HANGZHOU ZHONGNENG STEAM TURBINE POWER CO LTD
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Patent Information

Application Number
CN202420925595.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-30
Publication Date
2025-01-07
Estimated Expiration
2034-04-30

AI Technical Summary

Technical Problem

When assembling the horizontal cylinder flange, the increase in the double-headed stud leads to an increase in weight, which is difficult to operate, time-consuming and inconvenient, and may damage parts during screwing.

Method used

A pneumatic reversing bolt installation tool is designed, including a three-jaw chuck device, a cylinder assembly and a base assembly. The single-person operation and safe screwing of the double-headed studs are achieved through the cylinder piston rod and parallel handwheel, and the compression is used. Air provides force to reduce the risk of manual operation.

Benefits of technology

It realizes simple, safe and labor-saving installation of double-headed studs, reduces operating risks, avoids damage to parts, supports single-person operation, saves labor costs, and the workpiece is flexible, light, detachable, and has a small storage space.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of steam turbines, in particular to a pneumatic inverted-penetrating bolt installation tool which sequentially comprises a three-jaw chuck device, an air cylinder assembly and a base assembly from top to bottom. The pneumatic inverted-penetrating bolt installation tool enables the assembly process of installing a large-weight inverted-penetrating double-end stud to be simple, convenient and safe, reduces the operation risk of assembly personnel and improves the assembly efficiency. Potential safety hazards are eliminated, and the possibility of damage to parts is also avoided; through the mode that the piston rod is jacked up and the hand wheel is screwed in, the step of inverted penetrating installation of the double-end stud is more labor-saving and convenient; single-person operation can be realized, and the labor cost is saved; the tool is flexible and light, can be used while being taken, is detachable, has small storage space, and is convenient for tool management.
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Description

Technical Field

[0001] The utility model relates to the technical field of steam turbines, in particular to a pneumatic reverse-through bolt installation tool. Background Art

[0002] When assembling the horizontal flange of the cylinder, the assembly workshop is assembling the stud H2703. As the unit parameters increase, the required stud specifications and lengths gradually increase, and their weight also increases. Taking the H2703B stud BM135×6×770 as an example, the theoretical weight of the stud is about 86kg. When assembling the stud, it needs the cooperation of multiple people to lift and screw it in. There are many risks and inconveniences in the operation, which is time-consuming, labor-intensive, and labor-intensive. Moreover, when the stud is screwed in, it cannot be guaranteed to fit the screw hole exactly. The shaking of the stud caused by the weight during the screwing process may damage the thread pattern.

[0003] According to this assembly situation, the final assembly needs to design and purchase a reverse bolt installation tool. Utility Model Content

[0004] The purpose of this new use is to solve the above problems and design a pneumatic inverted bolt installation tool that can be operated by one person and enables a heavy stud to be simply and conveniently screwed into the horizontal center plane of the cylinder. This is achieved through the following technical solutions:

[0005] A pneumatic reverse bolt installation tool comprises, from top to bottom, a three-jaw chuck device, a cylinder assembly and a base assembly, wherein the three-jaw chuck device comprises a heightened counter-jaw, a three-jaw self-centering linkage chuck, a three-jaw chuck base, a parallel hand wheel and a transition joint, wherein the heightened counter-jaw is arranged on the three-jaw self-centering linkage chuck, the top of the three-jaw chuck base is connected to the three-jaw self-centering linkage chuck by screws, the middle section of the three-jaw chuck base is clamped with the parallel hand wheel, and the bottom threaded section of the three-jaw chuck base is threadedly connected with the transition joint;

[0006] The cylinder assembly includes a piston rod, a cylinder head, a cylinder housing, a first sealing ring, a throttling screw, a second sealing ring and a cylinder base. The top of the piston rod is clearance-matched with the transition joint. The cylinder head is installed on the cylinder housing. The piston rod penetrates into the cylinder housing, and the piston rod is partially exposed outside the cylinder head. The cylinder base is threadedly connected to the bottom of the cylinder housing, and the throttling screw is installed in the top of the cylinder base.

[0007] The base assembly includes a clamping flange, a first gasket, a spring, a screw, a second gasket, a welding truncated table, a supporting truncated table, a washer, a nut and a welding base. The clamping flange is installed on the bottom of the cylinder base through a threaded connection. The top of the screw is threadedly connected to the clamping flange, and the screw passes through the clamping flange, the first gasket, the spring, the second gasket, the welding truncated table and the supporting truncated table from top to bottom in sequence. The supporting truncated table is installed on the bottom of the welding truncated table, and the outer ring of the welding truncated table is welded and fixed to the cylinder base through multiple angle irons.

[0008] Furthermore, a pressure relief valve is connected to one side of the cylinder base, and the pressure relief valve is a stainless steel angle needle valve.

[0009] Furthermore, a first screw hole is opened on the side of the transition joint, and a column head screw is installed in the first screw hole.

[0010] Furthermore, a frustum surface is provided below the piston rod, and a groove is provided below the frustum surface and at the step surface of the cylinder base, and a first sealing ring and a second sealing ring are respectively installed in the groove.

[0011] Furthermore, a second screw hole for installing a throttling screw is provided on the top of the cylinder base, and an air inlet hole is provided on the other side of the cylinder base, and the second screw hole is connected to the air inlet hole.

[0012] Furthermore, the air inlet is externally connected to two stainless steel self-locking quick connectors for connecting to an air source provided by an external air pump.

[0013] Furthermore, a first gasket is installed on the stepped surface at the bottom of the clamping flange, and the outer diameter of the first gasket matches the inner diameter of the spring.

[0014] Furthermore, a slot for installing a second gasket is provided on the welding truncated table.

[0015] Furthermore, a washer and a nut are installed at the bottom of the screw.

[0016] Furthermore, the welding base is provided with a plurality of through holes.

[0017] The beneficial effects of the utility model are mainly reflected in:

[0018] The assembly process of installing heavy-weight inverted studs becomes simple, convenient and safe, reducing the operating risks of assemblers, eliminating safety hazards and avoiding the possibility of damage to parts. The inverted installation of studs is made more labor-saving and convenient by lifting the piston rod and screwing in the hand wheel. Single-person operation is possible, saving labor costs. The tooling is flexible and lightweight, ready for use, detachable, and requires little storage space, making it easy to manage tooling tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a pneumatic reverse bolt installation tool of the utility model;

[0020] Figure 2 It is a specific structural schematic diagram of the three-jaw chuck device of the utility model;

[0021] Figure 3 It is a specific structural schematic diagram of the cylinder assembly of the utility model;

[0022] Figure 4 It is a specific structural schematic diagram of the base assembly of the utility model;

[0023] Figure 5 It is a working system diagram of the utility model.

[0024] The following are marked in the figure:

[0025] 1-heightened counter-jaw, 2-three-jaw self-centering linkage chuck, 3-three-jaw chuck base, 4-parallel handwheel, 5-piston rod, 6-transition joint, 7-cylinder head, 8-cylinder housing, 9-first sealing ring, 10-throttling screw, 11-second sealing ring, 12-cylinder base, 13-clamping flange, 14-first gasket, 15-spring, 16-screw, 17-second gasket, 18-supporting round table, 19-nut, 20-welding base, 21-washer. DETAILED DESCRIPTION

[0026] The following describes the specific implementation of the utility model in detail in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand how to practice the utility model. Although the utility model is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative, rather than limiting the scope of the utility model.

[0027] Combined with Figure 1-5 As shown, a pneumatic inverted bolt installation tool includes a three-jaw chuck device, a cylinder assembly and a base assembly from top to bottom, the three-jaw chuck device includes a heightened counter-jaw 1, a three-jaw self-centering linkage chuck 2, a three-jaw chuck base 3, a parallel hand wheel 4 and a transition joint 6, the heightened counter-jaw 1 is arranged on the three-jaw self-centering linkage chuck 2, the model of the three-jaw self-centering linkage chuck 2 is K11-160, which is changed from the positive jaw used originally to a 160 heightened counter-jaw, and its clamping range is 95-160, and the clamping inner diameter can be adjusted according to the outer diameter of studs of different specifications, the top of the three-jaw chuck base 3 is connected to the three-jaw self-centering linkage chuck 2 by screws, the middle section of the three-jaw chuck base 3 is clamped with the parallel hand wheel 4, and the bottom threaded section of the three-jaw chuck base 3 is threadedly connected with the transition joint 6, and in addition, the parallel hand wheel 4 is made of ductile iron;

[0028] The cylinder assembly includes a piston rod 5, a cylinder head 7, a cylinder housing 8, a first sealing ring 9, a throttling screw 10, a second sealing ring 11 and a cylinder base 12. The top of the piston rod 5 is clearance-matched with the transition joint 6. The cylinder head 7 is installed on the cylinder housing 8. The piston rod 5 penetrates into the cylinder housing 8, and a portion of the piston rod 5 is exposed outside the cylinder head 7. The cylinder base 12 is threadedly connected to the bottom of the cylinder housing 8, and the throttling screw 10 is installed in the top of the cylinder base 12.

[0029] The base assembly includes a clamping flange 13, a first gasket 14, a spring 15, a screw 16, a second gasket 17, a welding truncated table, a supporting truncated table 18, a washer 21, a nut 19 and a welding base 20. The clamping flange 13 is installed on the bottom of the cylinder base 12 through a threaded connection. The top of the screw 16 is threadedly connected to the clamping flange 13, and the screw 16 passes through the clamping flange 13, the first gasket 14, the spring 15, the second gasket 17, the welding truncated table and the supporting truncated table 18 from top to bottom in sequence. The supporting truncated table 18 is installed on the bottom of the welding truncated table, and the outer ring of the welding truncated table is welded and fixed to the cylinder base 12 through a plurality of angle irons.

[0030] Specifically, a pressure relief valve is connected to one side of the cylinder base 12. The pressure relief valve is a stainless steel angle needle valve and can be used to relieve pressure when the air intake is too large.

[0031] Specifically, a first screw hole is opened on the side of the transition joint 6, and a column head screw is installed in the first screw hole, which helps to prevent the piston rod 5 from being separated from the transition joint 6 during the up and down operation.

[0032] Specifically, a frustum is provided under the piston rod 5, and a groove is provided under the frustum and at the step surface of the cylinder base 12, in which a first sealing ring 9 and a second sealing ring 11 are respectively installed. Compressed air enters the cylinder base 12 and applies force to the frustum to lift the piston rod 5 upward, so as to prevent the piston rod 5 from directly contacting the inner wall of the cylinder housing 8 during the up and down movement, thereby causing wear of parts. The first sealing ring 9 and the second sealing ring 11 help to enhance the sealing effect.

[0033] Specifically, a second screw hole for installing a throttling screw 10 is opened on the top of the cylinder base 12, and an air inlet hole is opened on the other side of the cylinder base 12. The second screw hole is connected to the air inlet hole, and the throttling screw 10 is set to control the intake flow rate.

[0034] Specifically, the air inlet is externally connected to two stainless steel self-locking quick connectors (male and female) for connecting to an air source provided by an external air pump.

[0035] Specifically, a first gasket 14 is installed on the stepped surface at the bottom of the clamping flange 13 . The outer diameter of the first gasket 14 matches the inner diameter of the spring 15 , and the lower side of the spring 15 abuts against the second gasket 17 .

[0036] Specifically, a slot for installing the second gasket 17 is provided on the welding truncated table, which helps to ensure stable installation of the second gasket 17 .

[0037] Specifically, a washer 21 and a nut 19 are installed at the bottom of the screw rod 16, and a plurality of through holes are opened on the welding base 20. The through holes are provided for connecting and fixing with the flatbed truck to prevent the tooling from shaking due to external forces during operation, thereby ensuring the overall stability of the tooling.

[0038] The specific working principle of the utility model is as follows:

[0039] When in use, fix the assembled tooling to the flatbed truck, insert the external chuck wrench into the knob hole of the three-jaw self-centering linkage chuck, and adjust the clamping inner diameter of the heightened counter-claw 1 according to the outer diameter of the nut end of the H2703 stud to be assembled. After adjustment, place the stud in the center of the three-jaw self-centering linkage chuck 2, with the nut end facing downward, turn the chuck wrench to fix the stud, and finally push the flatbed truck to the bottom of the horizontal center plane bolt hole of the cylinder to be installed.

[0040] An air pipe from the external air pump is connected to the air inlet on the side of the cylinder base 12 and connected to the stainless steel self-locking quick connector (male head). A G1 / 4 stainless steel angle needle valve is connected to the other side of the cylinder base 12. When the air intake is too large, turn on the external air pump, open the pressure relief valve, i.e. the stainless steel angle needle valve, and slowly close the pressure relief valve after introducing compressed air. The piston rod 5 is slowly raised by the compressed air, and slowly raises the three-jaw chuck device and the stud above. When the stud is raised to the point where the threaded end contacts the cylinder screw hole, rotate the parallel handwheel 4 to slowly screw the stud into the screw hole. After the stud is installed in place, turn off the air source, loosen the heightened anti-claw 1 with a chuck wrench, and evacuate the tooling.

[0041] The above is only a preferred implementation of the present invention, but the protection scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic back-through bolt installation tool, which includes a three-jaw chuck device, a cylinder assembly and a base assembly from top to bottom, and is characterized by: The three-jaw chuck device comprises a heightened counter-jaw (1), a three-jaw self-centering linkage chuck (2), a three-jaw chuck base (3), a parallel hand wheel (4) and a transition joint (6); the heightened counter-jaw (1) is arranged on the three-jaw self-centering linkage chuck (2); the top of the three-jaw chuck base (3) is connected to the three-jaw self-centering linkage chuck (2) by means of screws; the middle section of the three-jaw chuck base (3) is clamped to the parallel hand wheel (4); and the bottom threaded section of the three-jaw chuck base (3) is threadedly connected to the transition joint (6); The cylinder assembly comprises a piston rod (5), a cylinder head (7), a cylinder housing (8), a first sealing ring (9), a throttling screw (10), a second sealing ring (11) and a cylinder base (12); the top of the piston rod (5) is clearance-matched with the transition joint (6); the cylinder head (7) is mounted on the cylinder housing (8); the piston rod (5) penetrates into the cylinder housing (8), and a portion of the piston rod (5) is exposed outside the cylinder head (7); the cylinder base (12) is threadedly connected to the bottom of the cylinder housing (8); and the throttling screw (10) is mounted inside the top of the cylinder base (12); The base assembly comprises a clamping flange (13), a first gasket (14), a spring (15), a screw rod (16), a second gasket (17), a welding truncated platform, a supporting truncated platform (18), a washer (21), a nut (19) and a welding base (20); the clamping flange (13) is installed on the bottom of the cylinder base (12) by threaded connection; the top of the screw rod (16) is threadedly connected to the clamping flange (13); and the screw rod (16) passes through the clamping flange (13), the first gasket (14), the spring (15), the second gasket (17), the welding truncated platform and the supporting truncated platform (18) in sequence from top to bottom; the supporting truncated platform (18) is installed on the bottom of the welding truncated platform; and the outer ring of the welding truncated platform is welded and fixed to the cylinder base (12) by a plurality of angle irons.

2. A pneumatic inverted bolt installation tool according to claim 1, characterized in that: A pressure relief valve is connected to one side of the cylinder base (12), and the pressure relief valve is a stainless steel angle needle valve.

3. A pneumatic inverted bolt installation tool according to claim 1, characterized in that: A first screw hole is provided on the side of the transition joint (6), and a column head screw is installed in the first screw hole.

4. The pneumatic reverse bolt installation tool according to claim 1, characterized in that: A round table surface is provided below the piston rod (5), and a slot is provided below the round table surface and on the step surface of the cylinder base (12), wherein a first sealing ring (9) and a second sealing ring (11) are respectively installed in the slot.

5. The pneumatic reverse bolt installation tool according to claim 1, characterized in that: A second screw hole for mounting a throttling screw (10) is provided on the top of the cylinder base (12), and an air inlet hole is provided on the other side of the cylinder base (12), wherein the second screw hole is connected to the air inlet hole.

6. A pneumatic reverse bolt installation tool according to claim 5, characterized in that: The air inlet is externally connected to two stainless steel self-locking quick connectors for connecting to an air source provided by an external air pump.

7. The pneumatic reverse bolt installation tool according to claim 1, characterized in that: A first gasket (14) is installed on the stepped surface at the bottom of the clamping flange (13), and the outer diameter of the first gasket (14) matches the inner diameter of the spring (15).

8. The pneumatic reverse bolt installation tool according to claim 1, characterized in that: The welding truncated table is provided with a slot for mounting a second gasket (17).

9. The pneumatic reverse bolt installation tool according to claim 1, characterized in that: A washer (21) and a nut (19) are installed at the bottom of the screw rod (16).

10. The pneumatic reverse bolt installation tool according to claim 1, characterized in that: The welding base (20) is provided with a plurality of through holes.