Hydraulic bolt stretcher with portable and replaceable stretching head

Abstract

The utility model relates to the technical field of hydraulic bolt stretchers, in particular to a hydraulic bolt stretcher with a portable and replaceable stretching head, which comprises a fixing nut, when the hydraulic bolt stretcher is used, the fixing nut is sleeved on a nut, high-pressure oil enters a piston cylinder from a liquid injection port through a high-pressure hose and then flows into a piston groove, and under the action of pressure, the hydraulic bolt stretcher can be conveniently replaced. A piston in a piston cylinder moves upwards to drive a stretching pipe to move upwards, the stretching pipe is in threaded connection with a working bolt, a second gear rotates to drive a third gear meshed with the second gear to rotate, the third gear rotates to enable a nut fixed in a fixing nut to rotate, strong pulling force is provided through a hydraulic system, and a stretching head acts on the bolt. Accurate stretching and fastening of the bolt are achieved, the reliability and stability of bolt connection can be effectively improved, and equipment faults and potential safety hazards caused by bolt loosening or improper fastening are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic bolt tensioners, in particular to a hydraulic bolt tensioner with a portable replaceable tensioning head. Background Art

[0002] A hydraulic bolt tensioner with a portable replaceable tensioning head is an innovative and practical tool in the engineering field. It has many advantages, such as easy operation, high efficiency, and precise tension. It can play an important role in many fields such as mechanical manufacturing, equipment maintenance, and construction, bringing convenience and security to related work.

[0003] In order to achieve precise stretching and tightening of bolts, effectively improve the reliability and stability of bolt connections, and reduce equipment failures and safety hazards caused by loose or improperly tightened bolts, we proposed a hydraulic bolt tensioner with a portable replaceable stretching head. Utility Model Content

[0004] The purpose of the utility model is to provide a portable hydraulic bolt tensioner with a replaceable tensioning head, so as to solve the problem proposed in the above background technology that in order to achieve accurate tensioning and tightening of bolts, the reliability and stability of bolt connections can be effectively improved, and equipment failures and safety hazards caused by loose bolts or improper tightening can be reduced. To achieve the above purpose, the utility model provides the following technical solutions: a portable hydraulic bolt tensioner with a replaceable tensioning head, comprising a fixed nut, a fixed cover is fixedly connected to the top of the fixed nut, a rotating box is fixedly connected to the side surface of the fixed cover, a gear 1 is movably connected to the inside of the rotating box, the gear 1 is movably connected to the gear 2 through meshing, the gear 2 is movably connected to the inside of the rotating box, the gear 2 is movably connected to the gear 3 through meshing, the gear 3 is movably connected to the inside of the fixed cover, and a driving groove is provided on the top of the gear 1. When the portable hydraulic bolt tensioner with a replaceable tensioning head is used, the fixed nut is put on the nut, and the high-pressure oil enters the piston cylinder from the injection port through the high-pressure hose, and flows to the piston groove. Inside the cylinder, under the action of pressure, the piston in the piston cylinder moves up, driving the stretching tube to move upward, and the stretching tube is threadedly connected to the working bolt, thereby lengthening the working bolt. When the bolt reaches the required deformation, the external motor is installed inside the drive slot, and the motor starts to rotate to drive gear one to rotate. The rotation of gear one drives gear two meshing with it to rotate. The rotation of gear two drives gear three meshing with it to rotate. The rotation of gear three will cause the nut fixed inside the fixing nut to rotate. The hydraulic system provides a strong pulling force, so that the stretching head acts on the bolt to achieve precise stretching and tightening of the bolt, which can effectively improve the reliability and stability of the bolt connection and reduce equipment failures and safety hazards caused by loose or improper tightening of bolts.

[0005] Further preferably, the interior of the fixed cover is movably connected to a stretching tube, the side surface of the stretching tube is fixedly connected to a fixing ring, and the side surface of the fixing ring is movably connected to a piston cylinder. The structure is light and compact, and can be easily carried to various workplaces, especially in areas with limited space or difficult to reach, so that operations can be carried out flexibly and work efficiency can be improved.

[0006] Further preferably, a hydraulic box is fixedly connected to one side of the piston cylinder, a liquid filling port is provided on the top of the hydraulic box, a piston groove is provided inside the piston cylinder, and the design of the replaceable stretching head enables it to adapt to bolts of various specifications and types, thereby reducing the trouble of preparing multiple special tools due to differences in bolts and reducing costs.

[0007] Further preferably, the top of the fixed cover is movably connected with a support ring, the side surface of the stretching tube is fixedly connected with a connecting ring 1, and the side surface of the connecting ring 1 is fixedly connected with a limiting connecting ring 2. The hydraulic system is used to provide stable and precise pulling force to ensure that the bolt stretching degree meets the requirements, thereby achieving a more reliable bolt connection and improving the stability and safety of equipment operation.

[0008] Further preferably, the side surface of the stretching tube is fixedly connected to limiting ring one, the side surface of the limiting ring one is fixedly connected to limiting ring two, and the side surface of the gear three is movably connected to limiting ring three, which can complete the stretching and tightening of the bolts in a shorter time, saves operation time, and helps to speed up the progress of the project.

[0009] Further preferably, the side surface of the limit collar three is movably connected to the inside of the fixed cover, and a stretching opening is provided on the top of the limit collar three. Compared with the traditional bolt tightening method, the physical labor of the operator is greatly reduced, work fatigue is reduced, and each operation can provide a relatively consistent stretching effect, thereby ensuring the stability and reliability of the bolt connection quality. The structure is relatively simple, easy to carry out daily maintenance and care, and the service life of the tool is extended.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] In the utility model, the portable hydraulic bolt tensioner with replaceable tensioning head, when in use, the fixed nut is sleeved on the nut, and the high-pressure oil enters the piston cylinder from the injection port through the high-pressure hose, and then flows to the inside of the piston groove. Under the action of pressure, the piston in the piston cylinder moves up, driving the tensioning tube to move upward, and the tensioning tube is threadedly connected with the working bolt, thereby lengthening the working bolt. When the bolt reaches the required deformation amount, the external motor is installed inside the driving groove, and the motor starts to rotate to drive gear one to rotate. The rotation of gear one drives gear two meshing with it to rotate. The rotation of gear two drives gear three meshing with it to rotate. The rotation of gear three can make the nut fixed inside the fixed nut rotate. The hydraulic system provides a strong pulling force, so that the tensioning head acts on the bolt, and the bolt is accurately stretched and tightened. The reliability and stability of the bolt connection can be effectively improved, and equipment failures and safety hazards caused by loose or improperly tightened bolts can be reduced.

[0012] In the utility model, the hydraulic bolt tensioner with a portable replaceable stretching head, when in use, releases the oil pressure in the hydraulic system, the piston in the oil cylinder retracts, and the stretching tube no longer applies tension to the bolt. At this time, since the nut has been tightened, the bolt generates a pre-tightening force in the process of restoring its original length, thereby realizing a reliable connection of the bolt. The structure is connected by mutually socketing various parts, and has high sealing and stability. At the same time, when the structure is used, its structure is light and compact, and it is convenient to carry to various workplaces, especially in areas with limited space or difficult to reach. It can flexibly carry out operations and improve work efficiency. The design of the replaceable stretching head enables it to adapt to bolts of various specifications and types, reducing the trouble of preparing multiple special tools due to differences in bolts, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the three-dimensional main structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the overall explosion structure of the utility model;

[0015] Figure 3 This is a side view of the three-dimensional structure of the utility model;

[0016] Figure 4 It is a schematic diagram of the cross-sectional three-dimensional structure of the utility model;

[0017] Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the utility model.

[0018] In the figure: 1. fixing nut; 2. fixing cover; 3. rotating box; 4. gear one; 5. gear two; 6. gear three; 7. stretching tube; 8. fixing ring; 9. piston cylinder; 10. hydraulic box; 11. filling port; 12. piston groove; 13. supporting ring; 14. connecting ring one; 15. limiting collar one; 16. connecting ring two; 17. limiting collar two; 18. limiting collar three; 19. stretching port; 20. driving groove. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-Figure 5 The utility model provides a technical solution: a hydraulic bolt tensioner with a portable replaceable tensioning head, comprising a fixing nut 1, a fixing cover 2 fixedly connected to the top of the fixing nut 1, a rotating box 3 fixedly connected to the side surface of the fixing cover 2, a gear 1 4 movably connected to the inside of the rotating box 3, a gear 1 4 movably connected to a gear 2 5 through meshing, a gear 2 5 movably connected to the inside of the rotating box 3, a gear 2 5 movably connected to a gear 3 6 through meshing, a gear 3 6 movably connected to the inside of the fixing cover 2, a driving groove 20 is provided on the top of the gear 1 4, when in use, the user puts the fixing nut 1 on the nut, and allows high-pressure oil to enter the piston cylinder 9 from the injection port 11 through the high-pressure hose, and then flows to the inside of the piston groove 12, and under the action of pressure, the piston The piston in the cylinder 9 moves upward, driving the stretching tube 7 to move upward. The stretching tube 7 is threadedly connected to the working bolt, thereby lengthening the working bolt. When the bolt reaches the required deformation, the external motor is installed inside the driving slot 20, and the motor starts to rotate to drive gear 1 4 to rotate. The rotation of gear 1 4 drives the gear 2 5 meshing therewith to rotate. The rotation of gear 2 5 drives the gear 3 6 meshing therewith to rotate. The rotation of gear 3 6 will cause the nut fixed inside the fixing nut 1 to rotate. The hydraulic system provides a strong pulling force, so that the stretching head acts on the bolt to achieve precise stretching and tightening of the bolt, which can effectively improve the reliability and stability of the bolt connection and reduce equipment failures and safety hazards caused by loose or improper tightening of the bolt.

[0021] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the interior of the fixed cover 2 is movably connected with a stretching tube 7, the side surface of the stretching tube 7 is fixedly connected with a fixing ring 8, the side surface of the fixing ring 8 is movably connected with a piston cylinder 9, one side of the piston cylinder 9 is fixedly connected with a hydraulic box 10, the top of the hydraulic box 10 is provided with a liquid filling port 11, and the interior of the piston cylinder 9 is provided with a piston groove 12.

[0022] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the top of the fixed cover 2 is movably connected with a support ring 13, the side surface of the stretching tube 7 is fixedly connected with a connecting ring 14, the side surface of the connecting ring 14 is fixedly connected with a limiting connecting ring 2 16, the side surface of the stretching tube 7 is fixedly connected with a limiting sleeve ring 15, the side surface of the limiting sleeve ring 15 is fixedly connected with a limiting sleeve ring 2 17, the side surface of the gear 3 6 is movably connected with a limiting sleeve ring 3 18, the side surface of the limiting sleeve ring 3 18 is movably connected to the inside of the fixed cover 2, and a stretching port 19 is opened on the top of the limiting sleeve ring 3 18 to release the oil pressure in the hydraulic system, the piston in the oil cylinder retracts, and the stretching tube 7 no longer presses the screw The bolt applies tension. At this time, since the nut has been tightened, the bolt generates pre-tightening force in the process of restoring its original length, thereby realizing reliable connection of the bolt. The structure is connected by mutual socketing of various parts, and has high sealing and stability. At the same time, when using the structure, its structure is light and compact, and it is convenient to carry to various workplaces, especially in areas with limited space or difficult to reach. It can flexibly carry out operations and improve work efficiency. The design of the replaceable stretching head enables it to adapt to bolts of various specifications and types, reducing the trouble of preparing multiple special tools due to differences in bolts and reducing costs.

[0023] The use method and advantages of the utility model: When the hydraulic bolt tensioner with a portable replaceable tensioning head is used, the working process is as follows:

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, when in use, the user puts the fixing nut 1 on the nut, and allows the high-pressure oil to enter the piston cylinder 9 from the injection port 11 through the high-pressure hose, and then flows to the inside of the piston groove 12. Under the action of pressure, the piston in the piston cylinder 9 moves up, driving the stretching tube 7 to move upward, and the stretching tube 7 is threadedly connected with the working bolt, thereby stretching the working bolt. When the bolt reaches the required deformation amount, the external motor is installed inside the driving groove 20, and the motor starts to rotate to drive the gear 1 4 to rotate. The rotation of the gear 1 4 drives the gear 2 5 meshing with it to rotate. The rotation of the gear 2 5 drives the gear 3 6 meshing with it to rotate. The rotation of the gear 3 6 will cause the nut fixed inside the fixing nut 1 to rotate, and the hydraulic system provides a strong pulling force, so that the stretching head acts on the bolt, so as to achieve precise stretching and tightening of the bolt, which can effectively The reliability and stability of the bolt connection are improved, and equipment failures and safety hazards caused by loose or improperly tightened bolts are reduced. The oil pressure in the hydraulic system is released, and the piston in the oil cylinder retracts. The stretching tube 7 no longer applies tension to the bolt. At this time, since the nut has been tightened, the bolt generates a pre-tightening force in the process of restoring its original length, thereby realizing a reliable connection of the bolt. The structure is connected by mutually socketing various parts, and has high sealing and stability. At the same time, when using the structure, its structure is light and compact, and it is convenient to carry to various workplaces, especially in areas with limited space or difficult to reach. It can flexibly carry out operations and improve work efficiency. The design of the replaceable stretching head enables it to adapt to bolts of various specifications and types, reducing the trouble of preparing multiple special tools due to differences in bolts and reducing costs.

[0025] The above shows and describes the basic principle, main features and advantages of the utility model. Technical staff in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A hydraulic bolt tensioner with a portable replaceable tensioning head, comprising a fixing nut (1), characterized in that: The top of the fixing nut (1) is fixedly connected to a fixing cover (2), the side surface of the fixing cover (2) is fixedly connected to a rotating box (3), the interior of the rotating box (3) is movably connected to a gear 1 (4), the gear 1 (4) is movably connected to a gear 2 (5) through meshing, the gear 2 (5) is movably connected to the interior of the rotating box (3), the gear 2 (5) is movably connected to a gear 3 (6) through meshing, the gear 3 (6) is movably connected to the interior of the fixing cover (2), and a driving groove (20) is provided on the top of the gear 1 (4).

2. A portable hydraulic bolt tensioner with replaceable tensioning head according to claim 1, characterized in that: The interior of the fixed cover (2) is movably connected to a stretch tube (7), the side surface of the stretch tube (7) is fixedly connected to a fixing ring (8), and the side surface of the fixing ring (8) is movably connected to a piston cylinder (9).

3. A portable hydraulic bolt tensioner with replaceable tensioning head according to claim 2, characterized in that: A hydraulic box (10) is fixedly connected to one side of the piston cylinder (9), a liquid injection port (11) is provided on the top of the hydraulic box (10), and a piston groove (12) is provided inside the piston cylinder (9).

4. A portable hydraulic bolt tensioner with replaceable tensioning head according to claim 3, characterized in that: The top of the fixed cover (2) is movably connected to a support ring (13), the side surface of the stretch tube (7) is fixedly connected to a connecting ring 1 (14), and the side surface of the connecting ring 1 (14) is fixedly connected to a limiting connecting ring 2 (16).

5. A portable hydraulic bolt tensioner with replaceable tensioning head according to claim 4, characterized in that: The side surface of the stretch tube (7) is fixedly connected to a first limiting collar (15), and the side surface of the first limiting collar (15) is fixedly connected to a second limiting collar (17).

6. The portable hydraulic bolt tensioner with replaceable tensioning head according to claim 1, characterized in that: The side surface of the gear three (6) is movably connected to the limiting collar three (18).

7. A portable hydraulic bolt tensioner with replaceable tensioning head according to claim 6, characterized in that: The side surface of the limiting collar three (18) is movably connected to the interior of the fixed cover (2).

8. A portable hydraulic bolt tensioner with replaceable tensioning head according to claim 7, characterized in that: A stretching opening (19) is provided at the top of the limiting collar (18).

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