Parallel oil cylinder type integral bolt tensioner

Abstract

The utility model relates to the technical field of bolt tensioners, and discloses a parallel oil cylinder type integral bolt tensioner, which is characterized in that the top of a piston is provided with a connecting assembly, the bottom of a fixed seat is provided with four bases, and the outer sides of the four bases are respectively provided with a shifting assembly; the gasket is connected to the outer side of the bolt rod in a sleeved mode, then the nut is screwed to the position above the gasket, then the rotating ring is arranged on the outer side of the nut in a sleeved mode, at the moment, the base can be arranged on the outer side of the rotating ring in a sleeved mode, the bolt rod penetrates through the interior of the fixing base and extends to the outer side of the top of the fixing base, and then the inner thread ring is screwed to the outer side of the bolt rod. The internal thread ring abuts against the upper portion of the piston, at the moment, the connector can be connected with an oil pipe, oil enters the oil cavity through the connector and enters the oil cavity through the oil guide hole, and therefore the piston is pushed to move upwards, synchronous upward stretching of the multiple bolt rods can be completed, and it is guaranteed that the stretching heights of the bolts are consistent; and the connection uniformity and stability are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt tensioners, in particular to a parallel oil cylinder type integral bolt tensioner. Background Art

[0002] Bolt tensioner is the abbreviation of bolt hydraulic tensioner, hydraulic tensioner. It uses the hydraulic source provided by the hydraulic booster pump (ultra-high pressure hydraulic pump) to determine the tension according to the tensile strength, yield coefficient and elongation of the material. The tension generated by the ultra-high pressure oil pump makes the bolts to be stretched in their elastic deformation zone, and the bolt diameter is slightly deformed, so that the nut is easy to loosen. In addition, it can also be used as a device for applying axial force to hydraulic interference connection for top pressure installation. The biggest advantage of the tensioner is that multiple bolts can be tightened and removed at the same time with a fixed value, and the force is evenly distributed. It is a safe, efficient and fast tool and the best way to tighten and remove bolts of various specifications. It is used in petrochemical, nuclear power, wind power, hydropower, thermal power, ships, railways, aerospace, mining, heavy machinery and other fields. Special tensioners can be designed according to different working conditions and user requirements.

[0003] Traditional bolt tensioners are usually single and cannot stretch multiple bolts at the same time. They cannot ensure that the tension height of multiple bolts is consistent, which will lead to uneven stress distribution, thereby increasing the burden on some bolts and reducing the reliability and safety of the overall connection. At the same time, the bolt tensioner needs to be used with the help of tools, which is inconvenient to use. Therefore, a parallel cylinder integral bolt tensioner is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a parallel cylinder integral bolt tensioner to solve the problem mentioned in the above background technology that the traditional bolt tensioner is usually single and cannot stretch multiple bolts at the same time, and cannot ensure the consistency of the stretched height of multiple bolts, which will lead to uneven stress distribution, thereby increasing the burden on certain bolts and reducing the reliability and safety of the overall connection. At the same time, the bolt tensioner needs to be used with the help of tools, which is inconvenient to use.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a parallel oil cylinder type integral bolt tensioner, comprising a fixed seat, a plurality of oil chambers are arranged on the top of the fixed seat, pistons are installed inside the plurality of oil chambers, a connecting assembly is arranged on the top of the piston, four bases are installed on the bottom of the fixed seat, a toggle assembly is arranged on the outside of the four bases, and a rotating assembly is arranged inside the four bases;

[0006] The toggle assembly includes four fixed plates, an arc-shaped slider and a connecting plate. The four fixed plates are respectively fixedly connected to the outer sides of the four bases. The tops of the four fixed plates are provided with arc-shaped slide grooves. The arc-shaped slider is slidably connected to the inside of the arc-shaped slide groove. The connecting plate is fixedly connected to the bottom of the arc-shaped slider. A toggle rod is movably penetrated through one side of the connecting plate, and a tension spring is movably sleeved on the outer side of the toggle rod.

[0007] Preferably, the connection assembly comprises four internal threaded rings, the four internal threaded rings are respectively arranged on the top of the fixing seat, and the outer sides of the four internal threaded rings are provided with insertion holes.

[0008] Preferably, the rotating assembly includes a swivel, the bottoms of the four bases are provided with placement grooves, gaskets are provided inside the placement grooves, the swivel is provided inside the placement grooves and located on the top of the gaskets, and a plurality of through holes are provided on the outer side of the swivel.

[0009] Preferably, one end of the tension spring is fixedly connected to the outer side of the connecting plate, and the other end of the tension spring is fixedly connected to the outer side of the shifting rod.

[0010] Preferably, one side of the four bases is provided with a slot, and one end of the lever passes through the slot and is movably inserted into the through hole.

[0011] Preferably, each of the plurality of oil chambers is provided with an oil guide hole, and two adjacent oil guide holes are interconnected.

[0012] Preferably, a connector is installed on the outer side of the fixing seat, and the connector is communicated with the oil chamber.

[0013] Compared with the prior art, the utility model adopts the above technical solution and has the following technical effects:

[0014] 1. The utility model sleeves the gasket on the outside of the bolt rod, then screws the nut to the top of the gasket, and then sleeves the swivel on the outside of the nut. At this time, the base can be sleeved on the outside of the swivel, the bolt rod penetrates the inside of the fixing seat and extends to the outside of the top of the fixing seat, and then the internal thread ring is screwed to the outside of the bolt rod so that the internal thread ring abuts against the top of the piston. At this time, the connector can be connected to the oil pipe, and the oil enters the inside of the oil chamber through the connector and the oil guide hole, thereby pushing the piston to move upward, and can complete the synchronous upward stretching of multiple bolt rods, ensure the uniformity of the bolt stretching height, and ensure the uniformity and stability of the connection.

[0015] 2. The utility model drives the connecting plate to move by pushing the lever, and drives the nut inside the rotating ring to rotate. Then, pull the lever outward to move on the outside of the connecting plate. At this time, the tension spring is in a stretched state. Pull the lever to reset it, so that the lever moves to the outside of the through hole. When the lever is released, the tension spring drives it to reset, and one end of the lever inserts into the inside of the through hole. Push the lever to move again, and drive the rotating ring to rotate through the lever, so that the nut moves to the top of the gasket, thereby completing the fixation of the nut, without the need to use tools, and the operation is more convenient and fast. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Structural schematic diagram of the utility model;

[0018] Figure 2 Structural schematic diagram of the fixing plate of the utility model;

[0019] Figure 3 Structural schematic diagram of the arc-shaped slider of the utility model;

[0020] Figure 4 Structural schematic diagram of the base section of the utility model;

[0021] Figure 5 Structural schematic diagram of the oil guide hole of the utility model.

[0022] Explanation of the reference numerals in the drawings: 1, fixed seat; 2, oil cavity; 3, piston; 4, internal thread ring; 5, jack; 6, base; 7, placement groove; 8, gasket; 9, rotating ring; 10, through hole; 11, fixing plate; 12, arc-shaped chute; 13, arc-shaped slider; 14, connecting plate; 15, lever; 16, tension spring; 17, oil guide hole; 18, connector. Detailed Embodiment

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than 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 efforts fall within the protection scope of the present utility model.

[0024] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0025] Example

[0026] In the prior art, bolt tensioners are usually single-body and cannot stretch multiple bolts at the same time. They cannot ensure that the tension heights of multiple bolts are consistent, which will lead to uneven stress distribution, thereby increasing the burden on certain bolts and reducing the reliability and safety of the overall connection. At the same time, bolt tensioners require the use of tools when in use, which is inconvenient to use.

[0027] See also Figures 1-5 The utility model provides a technical solution: a parallel oil cylinder type integral bolt tensioner, comprising a fixed seat 1, a plurality of oil chambers 2 are arranged on the top of the fixed seat 1, pistons 3 are installed inside the plurality of oil chambers 2, a connecting assembly is arranged on the top of the piston 3, four bases 6 are installed on the bottom of the fixed seat 1, a toggle assembly is arranged on the outer side of the four bases 6, and a rotating assembly is arranged inside the four bases 6;

[0028] By setting up the connecting assembly, it is possible to complete the synchronous upward stretching of multiple bolt rods, ensure the uniformity of the bolt stretching height, and ensure the uniformity and stability of the connection; the connecting assembly includes four internal threaded rings 4, the four internal threaded rings 4 are respectively arranged on the top of the fixed seat 1, and the outer sides of the four internal threaded rings 4 are provided with jacks 5, the rotating assembly includes a swivel 9, the bottoms of the four bases 6 are provided with placement grooves 7, the interior of the placement grooves 7 is provided with gaskets 8, the swivel 9 is arranged inside the placement grooves 7 and is located on the top of the gasket 8, the outer side of the swivel 9 is provided with a plurality of through holes 10, the interiors of the plurality of oil chambers 2 are provided with oil guide holes 17, and the adjacent two oil guide holes 17 are connected to each other, and the outer side of the fixed seat 1 A connecting head 18 is installed on the side, and the connecting head 18 is connected to the oil chamber 2; by sleeved the gasket 8 on the outside of the bolt rod, and then screwed the nut to the top of the gasket 8, and then sleeved the swivel 9 on the outside of the nut, the base 6 can be sleeved on the outside of the swivel 9, the bolt rod passes through the inside of the fixing seat 1 and extends to the outside of the top of the fixing seat 1, and then by screwing the internal thread ring 4 to the outside of the bolt rod, the internal thread ring 4 is made to contact the top of the piston 3, and then the connecting head 18 can be connected to the oil pipe, the oil enters the inside of the oil chamber 2 through the connecting head 18, and enters the inside of the oil chamber 2 through the oil guide hole 17, thereby pushing the piston 3 to move upward, and the synchronous upward stretching of multiple bolt rods can be completed.

[0029] By setting up the toggle assembly, the nut can be fixed without the aid of tools, and the operation is more convenient and quick; the toggle assembly includes four fixing plates 11, arc-shaped sliders 13 and connecting plates 14, the four fixing plates 11 are fixedly connected to the outer sides of the four bases 6 respectively, the tops of the four fixing plates 11 are provided with arc-shaped slide grooves 12, the arc-shaped sliders 13 are slidably connected to the inside of the arc-shaped slide grooves 12, the connecting plate 14 is fixedly connected to the bottom of the arc-shaped sliders 13, one side of the connecting plate 14 is movably penetrated by a toggle rod 15, the outer side of the toggle rod 15 is movably sleeved with a tension spring 16, one end of the tension spring 16 is fixedly connected to the outer side of the connecting plate 14, and the other end of the tension spring 16 is fixedly connected to the outer side of the toggle rod 15 On one side, a slot is provided on one side of each of the four bases 6, and one end of the lever 15 passes through the slot and is movably inserted into the through hole 10; the connecting plate 14 is moved by pushing the lever 15, and the nut inside the swivel 9 is rotated, and then the lever 15 is pulled outward to move on the outside of the connecting plate 14. At this time, the tension spring 16 is in a stretched state, and the lever 15 is pulled to reset, so that the lever 15 moves to the outside of the through hole 10. When the lever 15 is released, the tension spring 16 drives it to reset, and one end of the lever 15 is inserted into the inside of the through hole 10, and the lever 15 is pushed again to move, and the swivel 9 is rotated by the lever 15, so that the nut moves to the top of the gasket 8, thereby completing the fixation of the nut.

[0030] Working principle or structural principle, when multiple bolts need to be stretched, the gasket 8 is sleeved on the outside of the bolt rod, and the nut is screwed to the top of the gasket 8, and then the swivel 9 is sleeved on the outside of the nut. At this time, the base 6 can be sleeved on the outside of the swivel 9, and the bolt rod extends through the inside of the fixing seat 1 to the outside of the top of the fixing seat 1, and then the internal thread ring 4 is screwed to the outside of the bolt rod so that the internal thread ring 4 is against the top of the piston 3. At this time, the connector 18 can be connected to the oil pipe, and the oil enters the inside of the oil chamber 2 through the connector 18, and enters the inside of the oil chamber 2 through the oil guide hole 17, thereby pushing the piston 3 to move upward, which can complete the synchronous upward stretching of multiple bolt rods and ensure the uniform height of the bolt stretching;

[0031] After the tensile test of the bolt rod is completed, by pushing the lever 15 to move, the lever 15 drives the connecting plate 14 to move, the connecting plate 14 drives the arc-shaped slider 13 to slide inside the arc-shaped chute 12, so that the lever 15 drives the rotating ring 9 to rotate, and drives the nut inside the rotating ring 9 to rotate. Then, pull the lever 15 to move outside the connecting plate 14. At this time, the tension spring 16 is in a stretched state. By pulling the lever 15 to reset, the lever 15 moves to the outside of the through hole 10. When the lever 15 is released, one end of the lever 15 is inserted into the through hole 10. Push the lever 15 to move again. By driving the rotating ring 9 to rotate through the lever 15, the nut moves to the top of the gasket 8, thus completing the fixation of the nut. No tools are needed, and the operation is more convenient and fast.

[0032] Those skilled in the art can understand that the features recited in the various embodiments and / or claims of the present invention can be combined or / and combined in various ways, even if such combinations or combinations are not explicitly recited in the present invention. In particular, without departing from the spirit and teachings of the present invention, the features recited in the various embodiments and / or claims of the present invention can be combined and / or combined in various ways. All such combinations and / or combinations fall within the scope of the present invention.

Claims

1. A parallel cylinder type integral bolt tensioner, comprising a fixing seat (1), characterized in that: The top of the fixed seat (1) is provided with a plurality of oil chambers (2), each of the plurality of oil chambers (2) is provided with a piston (3), the top of the piston (3) is provided with a connecting assembly, the bottom of the fixed seat (1) is provided with four bases (6), the outer sides of the four bases (6) are provided with a toggle assembly, and the insides of the four bases (6) are provided with a rotating assembly; The toggle assembly comprises four fixed plates (11), an arc-shaped slider (13) and a connecting plate (14); the four fixed plates (11) are respectively fixedly connected to the outer sides of the four bases (6); the tops of the four fixed plates (11) are provided with arc-shaped slide grooves (12); the arc-shaped slider (13) is slidably connected to the inside of the arc-shaped slide groove (12); the connecting plate (14) is fixedly connected to the bottom of the arc-shaped slider (13); a toggle rod (15) is movably penetrated through one side of the connecting plate (14); and a tension spring (16) is movably sleeved on the outer side of the toggle rod (15).

2. The parallel cylinder type integral bolt tensioner according to claim 1, characterized in that: The connection assembly comprises four internal thread rings (4), the four internal thread rings (4) being respectively arranged on the top of the fixing seat (1), and the outer sides of the four internal thread rings (4) are each provided with a plug hole (5).

3. The parallel cylinder type integral bolt tensioner according to claim 1, characterized in that: The rotating assembly comprises a rotating ring (9), the bottoms of the four bases (6) are each provided with a placement groove (7), a gasket (8) is arranged inside the placement groove (7), the rotating ring (9) is arranged inside the placement groove (7) and located on the top of the gasket (8), and a plurality of through holes (10) are arranged on the outer side of the rotating ring (9).

4. The parallel cylinder type integral bolt tensioner according to claim 1, characterized in that: One end of the tension spring (16) is fixedly connected to the outside of the connecting plate (14), and the other end of the tension spring (16) is fixedly connected to the outside of the shifting rod (15).

5. The parallel cylinder type integral bolt tensioner according to claim 3, characterized in that: One side of the four bases (6) is provided with a slot, and one end of the lever (15) passes through the slot and is movably inserted into the through hole (10).

6. The parallel cylinder type integral bolt tensioner according to claim 1, characterized in that: Several of the oil chambers (2) are provided with oil guide holes (17) inside, and two adjacent oil guide holes (17) are connected to each other.

7. The parallel cylinder type integral bolt tensioner according to claim 6, characterized in that: A connector (18) is installed on the outer side of the fixing seat (1), and the connector (18) is connected to the oil chamber (2).

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