Hydraulic bolt tensioner device

Abstract

The utility model provides a hydraulic bolt tensioner device which comprises a piston cylinder, a piston is arranged in the piston cylinder, a rotating pipe is rotatably connected to the bottom end in the piston cylinder, a first nut sleeve is rotatably connected to the interior of the rotating pipe, and a plurality of first locking structures are arranged in the rotating pipe and the first nut sleeve. By designing the first locking structure, when the tensioner is used, the second nut sleeve is rotated through the second deflector rod and the second deflector rod hole, so that the tensioner moves downwards along the screw until a bolt to be loosened on the screw is located in the first nut sleeve, and then the screw rod is rotated through the turntable to drive the pressing block to clamp and fix the bolt; after the bolt is clamped, hydraulic oil is injected into the piston cylinder through the oil injection nozzle to drive the piston to move upwards so as to stretch the screw rod, and the first nut sleeve and the rotating pipe are rotated through the first shifting rod and the first shifting rod hole, so that the bolt is loosened, and the use cost is reduced while stretching of screws of different sizes is adapted.

Description

Technical Field

[0001] This utility model relates to the field of bolt tensioner technology, specifically a hydraulic bolt tensioner device. Background Technology

[0002] A bolt tensioner is short for a hydraulic bolt tensioner. It uses a hydraulic booster pump to provide a hydraulic source and determines the tension force based on the tensile strength, yield coefficient, and elongation of the material. It uses the tension generated by an ultra-high pressure oil pump to stretch the bolt within its elastic deformation zone, causing a slight deformation of the bolt diameter, which makes the nut easier to loosen.

[0003] Currently, most hydraulic bolt tensioners on the market have a fixed internal thread size, which is not suitable for tensioning bolts of different sizes. This limitation prevents them from being used for multiple purposes. Different sizes of tensioners need to be replaced for different sizes of bolts, which increases the cost of use.

[0004] Therefore, to address the above problems, we propose a hydraulic bolt tensioner device. Utility Model Content

[0005] The purpose of this invention is to provide a hydraulic bolt tensioner device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic bolt tensioner device, comprising a piston cylinder, a piston disposed inside the piston cylinder, a rotating tube rotatably connected to the bottom end of the piston cylinder, a first nut sleeve rotatably connected inside the rotating tube, a plurality of first locking structures disposed inside the rotating tube and the first nut sleeve, a second nut sleeve disposed inside the piston, and a second locking structure disposed inside the second nut sleeve, wherein the internal structures of the first locking structures and the second locking structures are identical.

[0007] As a further description of this utility model: the first locking structure includes a lead screw that is threadedly connected to the rotating tube and the first nut, and a pressure block is rotatably connected to one end of the plurality of lead screws that are close to each other, and a turntable is fixedly installed at the end of the lead screw that is away from the pressure block.

[0008] As a further description of this utility model: a notch is provided on the side wall of the rotating tube away from the piston cylinder, and a plurality of first lever holes are provided on the outer wall of the first nut sleeve, and a first lever can be inserted into the first lever hole.

[0009] As a further description of this utility model: the second nut sleeve has a groove and a through hole inside, the inner diameter of the first nut sleeve matches the inner diameter of the through hole, and a connecting nut is placed inside the groove.

[0010] As a further description of this utility model: the outer wall of the first nut sleeve is provided with a plurality of second lever holes, and a second lever can be inserted into the second lever hole; a bearing ring is fixedly installed between the outer wall of the first nut sleeve and the inner wall of the piston.

[0011] As a further description of this utility model: an oil injection nozzle is fixedly installed on one side of the outer wall of the piston cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention designs a first locking structure and a second locking structure on a hydraulic bolt tensioner device. In use, the second nut sleeve is rotated by the second lever and the second lever hole, causing the tensioner to move downward along the screw until the bolt to be loosened on the screw is located inside the first nut sleeve. Then, the screw is rotated by the turntable, which drives the pressure block to clamp and fix the bolt. After the bolt is clamped, hydraulic oil is injected into the piston cylinder through the oil injection nozzle to drive the piston to move upward, thereby stretching the screw. The first nut sleeve and the rotating tube are rotated by the first lever and the first lever hole, thereby loosening the bolt. This design adapts to the tensioning of screws of different sizes while reducing the cost of use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the second nut sleeve and its component structure according to the present invention;

[0016] Figure 3 This is a schematic diagram of the first locking structure of this utility model.

[0017] In the diagram: 1. Piston cylinder; 2. Piston; 3. Rotary tube; 4. First nut sleeve; 5. First locking structure; 501. Lead screw; 502. Pressure block; 503. Turntable; 6. First lever hole; 7. Second nut sleeve; 8. Second locking structure; 9. Groove; 10. Connecting nut; 11. Second lever hole; 12. Bearing ring; 13. Oil nozzle. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-3This utility model provides a technical solution: a hydraulic bolt tensioner device, including a piston cylinder 1, a piston 2 is disposed inside the piston cylinder 1, a rotating tube 3 is rotatably connected to the bottom end of the piston cylinder 1, a first nut sleeve 4 is rotatably connected inside the rotating tube 3, a plurality of first locking structures 5 are disposed inside the rotating tube 3 and the first nut sleeve 4, a second nut sleeve 7 is disposed inside the piston 2, and a second locking structure 8 is disposed inside the second nut sleeve 7, the first locking structure 5 and the second locking structure 8 have the same internal structure.

[0020] In this embodiment: the first locking structure 5 includes a lead screw 501 that is threadedly connected to the rotating tube 3 and the first nut sleeve 4. A pressure block 502 is rotatably connected to one end of the multiple lead screws 501 that are close to each other, and a turntable 503 is fixedly installed at the end of the lead screw 501 that is away from the pressure block 502.

[0021] In practical use: when the bolt to be loosened on the screw is located inside the first nut sleeve 4, the screw 501 can be rotated by the turntable 503 to drive the pressure block 502 to clamp and fix the bolt.

[0022] In this embodiment: a notch is provided on the side wall of the rotating tube 3 away from the piston cylinder 1, and a plurality of first lever holes 6 are provided on the outer wall of the first nut sleeve 4, and a first lever can be inserted into the first lever hole 6.

[0023] In practical use: After the bolt is clamped, hydraulic oil is injected into the piston cylinder 1 through the grease nipple 13 to drive the piston 2 to move upward, thereby stretching the screw. The first nut sleeve 4 and the rotating tube 3 are rotated through the first lever and the first lever hole 6 to loosen the bolt, so as to adapt to the stretching of screws of different sizes while reducing the cost of use.

[0024] In this embodiment: the second nut sleeve 7 has a groove 9 and a through hole inside, the inner diameter of the first nut sleeve 4 matches the inner diameter of the through hole, and the connecting nut 10 is placed inside the groove 9.

[0025] In practical use: the size of the connecting nut 10 can be replaced according to the screw to adapt to different sizes of screws.

[0026] In this embodiment: the outer wall of the first nut sleeve 4 is provided with a plurality of second lever holes 11, and a second lever can be inserted into the second lever hole 11. A bearing ring 12 is fixedly installed between the outer wall of the first nut sleeve 4 and the inner wall of the piston 2.

[0027] In practical use: the first nut sleeve 4 can rotate inside the piston 2 through the bearing ring 12, the second lever hole 11 and the second lever, so as to drive the tensioner to move downward along the screw and at the same time make the connecting nut 10 fit on the screw.

[0028] In this embodiment, an oil injection nozzle 13 is fixedly installed on one side of the outer wall of the piston cylinder 1.

[0029] In practical use: the oil nozzle 13 is connected to an external pressure pump, which can inject hydraulic oil into the piston cylinder 1 to raise and lower the piston 2.

[0030] Working principle: Before use, select a connecting nut 10 that matches the screw and fix the connecting nut 10 inside the second nut sleeve 7 through the second locking structure 8. Then, rotate the second nut sleeve 7 through the second lever and the second lever hole 11 to move the tensioner downward along the screw until the bolt to be loosened on the screw is located inside the first nut sleeve 4. Then, rotate the lead screw 501 through the turntable 503 to drive the pressure block 502 to clamp and fix the bolt. After the bolt is clamped, inject hydraulic oil into the piston cylinder 1 through the oil injection nozzle 13 to drive the piston 2 to move upward, thereby stretching the screw. Rotate the first nut sleeve 4 and the rotating tube 3 through the first lever and the first lever hole 6 to loosen the bolt. This method can adapt to the stretching of screws of different sizes while reducing the cost of use.

[0031] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydraulic bolt tensioner device, comprising a piston cylinder (1), characterized in that: The piston cylinder (1) is equipped with a piston (2) inside. A rotating tube (3) is rotatably connected to the bottom of the piston cylinder (1). A first nut sleeve (4) is rotatably connected inside the rotating tube (3). Multiple first locking structures (5) are provided inside the rotating tube (3) and the first nut sleeve (4). A second nut sleeve (7) is provided inside the piston (2). A second locking structure (8) is provided inside the second nut sleeve (7). The internal structures of the first locking structure (5) and the second locking structure (8) are the same. The first locking structure (5) includes a lead screw (5) threadedly connected to the rotating tube (3) and the first nut sleeve (4). 01), a pressure block (502) is rotatably connected to one end of multiple lead screws (501) that are close to each other. A turntable (503) is fixedly installed at the end of the lead screw (501) away from the pressure block (502). A notch is opened on the side wall of the rotating tube (3) away from the piston cylinder (1). A plurality of first lever holes (6) are opened on the outer wall of the first nut sleeve (4). A first lever can be inserted into the first lever hole (6). A groove (9) and a through hole are opened inside the second nut sleeve (7). The inner diameter of the first nut sleeve (4) matches the inner diameter of the through hole. A connecting nut (10) is placed inside the groove (9).

2. The hydraulic bolt tensioner device according to claim 1, characterized in that: The outer wall of the first nut sleeve (4) is provided with a plurality of second lever holes (11), and a second lever can be inserted into the second lever hole (11). A bearing ring (12) is fixedly installed between the outer wall of the first nut sleeve (4) and the inner wall of the piston (2).

3. The hydraulic bolt tensioner device according to claim 1, characterized in that: An oil injection nozzle (13) is fixedly installed on one side of the outer wall of the piston cylinder (1).

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