A portable bolt tensioner

Abstract

This application discloses a portable bolt tensioner, relating to the field of bolt tensioners. It includes a fixed nut with a fixed ring, and a fixed cover fixedly mounted on the fixed ring. A rotating box and a connecting part are respectively provided on the outer side of the fixed cover. An interface end is connected to the connecting part. A piston cylinder is provided inside the fixed cover, and a tensioning head connected to an external bolt is fixedly mounted on the telescopic end of the piston cylinder. This application achieves the positioning and installation of the fixed nut and fixed ring by rotating the mounting sleeve on the fixed nut into an internal thread groove, and by engaging the two first electromagnets on the fixed nut with corresponding second electromagnets installed in the fixed ring through the cooperation of the external thread and the internal thread groove. This application employs two different installation methods for disassembly and replacement, which can be selected according to usage requirements, thus further improving portability during use.

Description

Technical Field

[0001] This application relates to the field of bolt tensioners, and more particularly to a portable bolt tensioner. Background Technology

[0002] A bolt tensioner is an industrial device that uses a hydraulic pump to provide power and drives a piston through high-pressure oil to achieve elastic tension of bolts. It is mainly used for pre-tightening or loosening bolts and is widely used in power, petrochemical, shipbuilding, wind power and other fields.

[0003] A search revealed a Chinese patent with authorization announcement number CN222890852U, which discloses a portable hydraulic bolt tensioner with replaceable tension heads. The device includes a fixed nut, a fixed cover fixedly connected to the top of the fixed nut, a rotating box fixedly connected to the side surface of the fixed cover, a gear one movably connected inside the rotating box, and a gear two movably connected to the gear one through meshing. The gear two is movably connected inside the rotating box.

[0004] The portable hydraulic bolt tensioner with interchangeable tension heads in the aforementioned patent has the following shortcomings: Although the device can effectively improve the reliability and stability of bolt connections, reduce equipment failures and safety hazards caused by loose or improperly tightened bolts, and allows for the replacement of different tension heads;

[0005] However, the device describes the fixing nut and the fixing cover as being fixedly connected, but it does not describe how to disassemble and replace the fixing nut and the fixing cover. Therefore, when it is necessary to connect and stretch bolts that are not compatible with the fixing nut, it is difficult to quickly and conveniently disassemble and replace the fixing nut. Thus, the portability of the device during use can be further improved. Utility Model Content

[0006] To further improve the portability of the device during use, this application provides a portable bolt tensioner.

[0007] The portable bolt tensioner provided in this application adopts the following technical solution: A portable bolt tensioner includes a fixing nut, a fixing ring on the fixing nut, a fixing cover fixedly installed on the fixing ring, a rotating box and a connecting part on the outer side of the fixing cover, an interface end connected to the connecting part, a piston cylinder inside the fixing cover, a tensioning head fixedly installed at the telescopic end of the piston cylinder and connected to an external bolt, and a portable disassembly and assembly mechanism for the fixing nut on the fixing ring;

[0008] The portable assembly / disassembly mechanism includes an internal threaded groove at the bottom of the fixing ring, an mounting sleeve is provided in the internal threaded groove, and an external thread is provided on the outer surface of the mounting sleeve. The external thread is adapted to the internal threaded groove and screwed in, and the mounting sleeve is fixedly installed with the fixing nut.

[0009] By adopting the above technical solution, the mounting sleeve on the fixing nut is rotated and installed in the internal thread groove, and the fixing nut can be fixed by the cooperation of the external thread and the internal thread groove. Then, the fixing nut that matches the bolt being stretched can be replaced as needed. This disassembly and assembly method is relatively simple to operate and has a low cost, thus further improving the portability during use.

[0010] Preferably, the inner diameter of the mounting sleeve is larger than the inner diameter of the fixing nut.

[0011] By adopting the above technical solution, the inner diameter of the mounting sleeve is larger than the inner diameter of the fixing nut, which facilitates installation and use.

[0012] Preferably, the portable assembly and disassembly mechanism further includes multiple openings at the bottom of the fixing ring, each of which contains a corresponding second electromagnet, and multiple first electromagnets adapted to the corresponding second electromagnets are symmetrically fixedly installed on the top of the fixing nut.

[0013] By adopting the above technical solution and setting openings, an auxiliary installation function can be achieved.

[0014] Preferably, the lengths of the first electromagnet and the second electromagnet are the same as the length of the opening.

[0015] By adopting the above technical solution, the lengths of the first electromagnet and the second electromagnet are set to be the same as the length of the opening, which facilitates installation and connection.

[0016] Preferably, the fixing ring has a plurality of symmetrically arranged through holes for threading the first electromagnet and the second electromagnet.

[0017] By adopting the above technical solution, the power cord can be easily connected by setting a wire hole.

[0018] Preferably, a protective box is fixedly installed on one side of the fixing ring, and an opening is provided on one side of the protective box. An opening plate is hinged inside the opening by a torsion spring.

[0019] By adopting the above technical solution and setting up a protective box, the installation can be assisted.

[0020] Preferably, the protective box is equipped with an electromagnetic relay, which has a switch button for controlling the opening and closing of the corresponding first electromagnet and second electromagnet. The power supply line of the electromagnetic relay passes through one side of the protective box and is connected to the corresponding first electromagnet and second electromagnet.

[0021] By adopting the above technical solution, the two first electromagnets on the fixing nut are matched and attracted with the corresponding second electromagnets installed in the fixing ring, thereby completing the positioning and installation of the fixing nut and the fixing ring. Then, by opening the opening and closing plate, the opening and closing of the first and second electromagnets can be controlled by the switch button on the electromagnetic relay, which facilitates disassembly and subsequent replacement. Moreover, this application adopts two different installation methods for disassembly and replacement, which can be selected according to the usage requirements, thus further improving the practicality during use.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. This application utilizes a retaining ring and the like to rotate the mounting sleeve on the retaining nut into the internal thread groove. Through the engagement of the external thread and the internal thread groove, the two first electromagnets on the retaining nut are matched and attracted with the corresponding second electromagnets installed in the retaining ring, thereby completing the positioning and installation of the retaining nut and the retaining ring. This application employs two different installation methods for disassembly and replacement, which can be selected according to usage requirements, thus further improving portability during use.

[0024] 2. With the assistance of a protective box, etc., this application allows the opening and closing of the first and second electromagnets to be controlled by opening the opening and closing plate and by using the switch button on the electromagnetic relay, thereby facilitating disassembly, assembly, and subsequent replacement. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a portable bolt tensioner according to an embodiment of this application;

[0026] Figure 2 This is a schematic diagram illustrating the internal structure of the fixing cover, which is the main feature of this application embodiment;

[0027] Figure 3 This is a schematic diagram illustrating the portable assembly and disassembly structure, which is the main feature of Embodiment 1 of this application.

[0028] Figure 4 This is a schematic diagram illustrating the portable assembly and disassembly structure, which is the main feature of Embodiment 2 of this application.

[0029] Figure 5 This is a partial unfolded schematic diagram of Embodiment 2 of this application, which mainly illustrates the portable assembly and disassembly structure;

[0030] Figure 6 This is a schematic diagram illustrating the control opening and closing part of the portable disassembly and assembly structure, which is the main feature of Embodiment 2 of this application.

[0031] Reference numerals: 1. Fixing nut; 2. Fixing ring; 3. Fixing cover; 4. Rotating box; 5. Connecting part; 6. Interface end; 7. Piston cylinder; 9. Pulling head; 10. Internal thread groove; 11. Mounting sleeve; 12. External thread; 13. Opening; 14. First electromagnet; 15. Wire hole; 16. Second electromagnet; 17. Protective box; 18. Box opening; 19. Opening and closing plate; 20. Electromagnetic relay; 21. Switch button. Detailed Implementation

[0032] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0033] This application discloses a portable bolt tensioner.

[0034] Example 1

[0035] Reference Figure 1-3 A portable bolt tensioner includes a fixing nut 1, a fixing ring 2 on the fixing nut 1, a fixing cover 3 fixedly installed on the fixing ring 2, a rotating box 4 and a connecting part 5 on the outer side of the fixing cover 3, an interface end 6 connected to the connecting part 5, a piston cylinder 7 inside the fixing cover 3, a tension head 9 connected to an external bolt fixedly installed at the telescopic end of the piston cylinder 7, and a portable disassembly and assembly mechanism set on the fixing ring 2 and the fixing nut 1 for disassembly and replacement.

[0036] The portable assembly and disassembly mechanism includes an internal thread groove 10 at the bottom of the fixing ring 2, an installation sleeve 11 in the internal thread groove 10, an external thread 12 on the outer surface of the installation sleeve 11, the external thread 12 being screwed into the internal thread groove 10, the installation sleeve 11 being fixedly installed with the fixing nut 1, and the inner diameter of the installation sleeve 11 being larger than the inner diameter of the fixing nut 1.

[0037] In use, the mounting sleeve 11 on the fixing nut 1 is rotated and installed in the internal thread groove 10, and the fixing nut 1 is fixed by the cooperation of the external thread 12 with the internal thread groove 10. Then, the fixing nut 1 that is compatible with the bolt being stretched can be replaced as needed. This disassembly and assembly method is relatively simple to operate and has a low cost, thus further improving the portability during use.

[0038] By placing the fixing nut 1 on the nut of the bolt being stretched, the interface end 6 is connected to the external high-pressure hose. The high-pressure oil output by the hydraulic pump drives the piston in the piston cylinder 7 to move upward, which in turn moves the stretching head 9 and the bolt. This causes the bolt to be stretched in the elastic deformation zone. After slight deformation of the diameter, it returns to its original shape. The hydraulic system provides a strong pulling force, which causes the stretching head 9 to act on the bolt, achieving precise stretching and tightening of the bolt. This can effectively improve the reliability and stability of the bolt connection and reduce equipment failures and safety hazards caused by loose or improperly tightened bolts.

[0039] Example 2

[0040] Reference Figure 3-5 The portable assembly and disassembly mechanism also includes multiple openings 13 at the bottom of the fixing ring 2, each of which is fixedly installed with a corresponding second electromagnet 16. Multiple first electromagnets 14 adapted to the corresponding second electromagnets 16 are symmetrically fixedly installed on the top of the fixing nut 1. The lengths of the first electromagnets 14 and the second electromagnets 16 are the same as the lengths of the openings 13. Multiple wire holes 15 are symmetrically opened on the fixing ring 2 for threading the corresponding first electromagnets 14 and second electromagnets 16. A protective box 17 is fixedly installed on one side of the fixing ring 2. A box opening 18 is opened on one side of the protective box 17. An opening plate 19 is hinged inside the box opening 18 by a torsion spring.

[0041] Reference Figure 5-6 The protective box 17 contains an electromagnetic relay 20. The electromagnetic relay 20 has a switch button 21 for controlling the opening and closing of the corresponding first electromagnet 14 and second electromagnet 16. The power supply line of the electromagnetic relay 20 passes through one side of the protective box 17 and is connected to the corresponding first electromagnet 14 and second electromagnet 16. The power supply method for connecting the first electromagnet 14 and second electromagnet 16 and the electromagnetic relay 20, as well as the installation and use process, are all existing technologies, so the specific use and installation process is not described.

[0042] In use, the two first electromagnets 14 on the fixing nut 1 are matched and attracted with the corresponding second electromagnets 16 installed in the fixing ring 2, thereby completing the positioning and installation of the fixing nut 1 and the fixing ring 2. Then, by opening the opening and closing plate 19, the opening and closing of the first electromagnets 14 and the second electromagnets 16 can be controlled by the switch button 21 on the electromagnetic relay 20, which facilitates disassembly, assembly, and subsequent replacement. Moreover, this application adopts two different installation methods for disassembly and replacement, which can be selected according to the usage requirements, thus further improving the portability during use.

[0043] The implementation principle of a portable bolt tensioner according to an embodiment of this application is as follows: When in use, the mounting sleeve 11 on the fixing nut 1 is rotated and installed in the internal thread groove 10, and the fixing nut 1 can be fixed by the cooperation of the external thread 12 with the internal thread groove 10. Then, the fixing nut 1 that is compatible with the bolt being tensioned can be replaced as needed. This disassembly and assembly method is relatively simple to operate and has a low cost, thus further improving the portability during use.

[0044] By adapting and attracting the two first electromagnets 14 on the fixing nut 1 with the corresponding second electromagnets 16 installed in the fixing ring 2, the fixing nut 1 and the fixing ring 2 can be positioned and installed. Then, by opening the opening plate 19, the opening and closing of the first electromagnets 14 and the second electromagnets 16 can be controlled by the switch button 21 on the electromagnetic relay 20, which facilitates disassembly and subsequent replacement. Moreover, this application adopts two different installation methods for disassembly and replacement, which can be selected according to the usage requirements, thus further improving the portability during use.

[0045] By placing the fixing nut 1 on the nut of the bolt being stretched, the interface end 6 is connected to the external high-pressure hose. The high-pressure oil output by the hydraulic pump drives the piston in the piston cylinder 7 to move upward, which in turn moves the stretching head 9 and the bolt. This causes the bolt to be stretched in the elastic deformation zone. After slight deformation of the diameter, it returns to its original shape. The hydraulic system provides a strong pulling force, which causes the stretching head 9 to act on the bolt, achieving precise stretching and tightening of the bolt. This can effectively improve the reliability and stability of the bolt connection and reduce equipment failures and safety hazards caused by loose or improperly tightened bolts.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A portable bolt tensioner, comprising a fixing nut (1), characterized in that: The fixing nut (1) is provided with a fixing ring (2), and a fixing cover (3) is fixedly installed on the fixing ring (2). A rotating box (4) and a connecting part (5) are respectively provided on the outside of the fixing cover (3). An interface end (6) is connected to the connecting part (5). A piston cylinder (7) is provided inside the fixing cover (3). A tension head (9) is fixedly installed on the telescopic end of the piston cylinder (7) and connected to the external bolt. A portable disassembly and assembly mechanism for the fixing nut (1) is provided on the fixing ring (2). The portable assembly and disassembly mechanism includes an internal threaded groove (10) at the bottom of the fixing ring (2), an installation sleeve (11) is provided in the internal threaded groove (10), and an external thread (12) is provided on the outer surface of the installation sleeve (11). The external thread (12) is adapted to the internal threaded groove (10) and screwed in. The installation sleeve (11) is fixedly installed with the fixing nut (1).

2. The portable bolt tensioner according to claim 1, characterized in that: The inner diameter of the mounting sleeve (11) must be larger than the inner diameter of the fixing nut (1).

3. A portable bolt tensioner according to claim 1, characterized in that: The portable assembly and disassembly mechanism also includes multiple openings (13) at the bottom of the fixing ring (2), and a corresponding second electromagnet (16) is fixedly installed in each of the multiple openings (13). Multiple first electromagnets (14) adapted to the corresponding second electromagnets (16) are symmetrically fixedly installed on the top of the fixing nut (1).

4. A portable bolt tensioner according to claim 3, characterized in that: The lengths of the first electromagnet (14) and the second electromagnet (16) are the same as the length of the opening (13).

5. A portable bolt tensioner according to claim 4, characterized in that: The fixing ring (2) is symmetrically provided with a plurality of threading holes (15) for threading the first electromagnet (14) and the second electromagnet (16).

6. A portable bolt tensioner according to claim 5, characterized in that: A protective box (17) is fixedly installed on one side of the fixed ring (2). A box opening (18) is opened on one side of the protective box (17). An opening plate (19) is hinged inside the box opening (18) by a torsion spring.

7. A portable bolt tensioner according to claim 6, characterized in that: The protective box (17) is equipped with an electromagnetic relay (20). The electromagnetic relay (20) is equipped with a switch button (21) for controlling the opening and closing of the corresponding first electromagnet (14) and second electromagnet (16). The power supply line of the electromagnetic relay (20) passes through one side of the protective box (17) and is connected to the corresponding first electromagnet (14) and second electromagnet (16).

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