CN216913721U

CN216913721U - Bolt stretcher combined with hydraulic jack

Info

Publication number: CN216913721U
Application number: CN202220762258.5U
Authority: CN
Inventors: 王昌昊; 黎勇; 徐恺; 罗凯元; 梁文硕
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-07-08
Anticipated expiration: 2032-04-02

Abstract

The utility model discloses a bolt stretcher combined with a hydraulic jack, which belongs to the technical field of mechanical tools and comprises a supporting bridge, wherein an oil way is drilled in the inner cavity of the supporting bridge, a ventilating screw plug is arranged at the left end of the supporting bridge, an oil return valve is arranged at the left end of the supporting bridge, the right end of the oil return valve penetrates through the outer end of the oil way, a cylinder body is fixedly connected to the upper end of the supporting bridge, a stretching head is sleeved at the upper end of the cylinder body, a cylinder body piston is arranged in the inner cavity of the cylinder body, an inner sealing ring is arranged at the inner bottom end of the cylinder body, an outer sealing ring is arranged at the inner bottom end of the cylinder body, and the outer sealing ring is positioned at the outer side of the inner sealing ring. The working efficiency is improved.

Description

Bolt stretcher combined with hydraulic jack

Technical Field

The utility model relates to the technical field of mechanical tools, in particular to a bolt stretcher combined with a hydraulic jack.

Background

A hydraulic bolt tensioner is called as a hydraulic tensioner for short, in the process of equipment assembly, a certain pretightening force is required to be achieved on a mounting bolt, so that the stress of a connecting part is uniform, a spanner is adopted for a small bolt to be pretightened manually, and a special tool is required to be adopted as an aid for a large bolt to meet the pretightening requirement.

The traditional hydraulic bolt tensioner can encounter the situation of difficult work when stretching some places which are remote and not easy to move, mainly because of the complex and heavy structure. In view of the above technical shortcomings, there is a need for an optimized design of a hydraulic bolt tensioner to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

Aiming at the problems in the prior art, the utility model aims to provide a bolt stretcher combined with a hydraulic jack, and the scheme can realize that when larger bolts are pre-tensioned in the process of assembling equipment in the field, compared with a traditional bolt stretcher hydraulic system, the device is more convenient to transport and operate, is suitable for pre-tensioning and disassembling the larger bolts, improves the working efficiency in the process of assembling the equipment in the field, and is more convenient to transport and operate compared with the traditional bolt stretcher hydraulic system when the larger bolts are pre-tensioned, is suitable for pre-tensioning and disassembling the larger bolts, and improves the working efficiency.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A bolt stretcher combined with a hydraulic jack comprises a supporting bridge, wherein an oil way is chiseled in an inner cavity of the supporting bridge, a ventilating plug screw is installed at the left end of the supporting bridge, an oil return valve is installed at the left end of the supporting bridge, the right end of the oil return valve penetrates through the outer end of the oil way, a cylinder body is fixedly connected to the upper end of the supporting bridge, a stretching head is sleeved on the upper end of the cylinder body, a cylinder body piston is installed in the inner cavity of the cylinder body, an inner closed ring is installed at the inner bottom end of the cylinder body, an outer closed ring is installed at the inner bottom end of the cylinder body and located on the outer side of the inner closed ring, a first one-way valve is installed at the upper end of the oil way, a threaded sleeve is in threaded connection with the upper end of the supporting bridge, a sleeve cover is in threaded connection with the upper end of the threaded sleeve, a pulling ring is installed at the inner bottom end of the supporting bridge, and a manual hydraulic device is installed at the outer end of the supporting bridge, this scheme can realize carrying out the in-process of assembling to equipment in the field, when carrying out the pretension to great bolt, compares in traditional bolt stretcher hydraulic system, and this device transportation is more convenient with the operation, is fit for carrying out pretension and dismantlement to great bolt, has improved work efficiency.

Further, manual hydraulic means includes the rocking handle, the lower extreme of rocking handle rotates with the outer end of supporting the bridge and is connected, the upper end of rocking handle rotates and is connected with handle connecting sleeve, handle connecting sleeve's inner chamber cover is equipped with operating handle, handle connecting sleeve's lower extreme rotates and is connected with the jack piston, the outer pot head of jack piston is equipped with buffer spacer, the lower extreme of jack piston is located the inner chamber of screw sleeve, the outer pot head of jack piston is equipped with the second sealing member, the outer end of second sealing member contacts with screw sleeve's inner wall, through setting up manual hydraulic means, makes things convenient for artifical driving energy to convert the pressure energy of hydraulic oil into by the supporting the bridge piston cylinder through the transmission of mechanical energy to open seal inslot installation second sealing member on the cylinder body piston and prevent that hydraulic oil from revealing.

Furthermore, the outer pot head of operating handle is equipped with anti-skidding cover, anti-skidding cover adopts rubber materials to make, adopts the anti-skidding cover that rubber materials made through the setting, can play certain anti-skidding effect, makes operation workman's hold the sense more comfortable when the operation simultaneously, is fit for permanent operation.

Further, the second check valve is installed to the inner chamber of support bridge, the second check valve is located the outside of first check valve, the hydraulic pressure table is installed to the outer end of second check valve, the hydraulic pressure table is located the outside of support bridge, and through setting up the second check valve, it is opposite with the installation direction of first check valve for during restriction hydraulic oil flow direction guarantees fluid and flows into the cylinder body by the oil bath outflow, through setting up first check valve, can audio-visual observation to the pressure in the cylinder body.

Furthermore, the upper end of supporting the bridge is equipped with the box gasket, the box gasket is located the outside of oil circuit, the upper end of box gasket contacts with the lower extreme of cylinder body, through setting up the box gasket, can strengthen the leakproofness of being connected between supporting the bridge and the cylinder body, prevents that the hydraulic oil in the oil circuit from taking place to reveal.

Furthermore, first sealing member is installed to the right-hand member of oil circuit, first sealing member is located the inner chamber of supporting the bridge, through setting up first sealing member, has sealed it by first sealing member after having added hydraulic oil in to the oil circuit, prevents that hydraulic oil from producing the seepage, also is convenient for the change and the interpolation of hydraulic oil simultaneously.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages that:

(1) this scheme can realize carrying out the in-process of assembling to equipment in the field, when pretensioning to great bolt, compare in traditional bolt stretcher hydraulic system, and this device transportation is more convenient with the operation, is fit for carrying out pretension and dismantlement to great bolt, has improved work efficiency.

(2) The manual hydraulic means includes the rocking handle, the lower extreme of rocking handle rotates with the outer end of supporting bridge to be connected, the upper end of rocking handle rotates and is connected with handle connecting sleeve, handle connecting sleeve's inner chamber cover is equipped with operating handle, handle connecting sleeve's lower extreme rotates and is connected with the jack piston, the outer pot head of jack piston is equipped with buffer pad, the lower extreme of jack piston is located the telescopic inner chamber of screw thread, the outer pot head of jack piston is equipped with the second sealing member, the outer end and the telescopic inner wall of screw thread of second sealing member contact, through setting up manual hydraulic means, make things convenient for artifical driving energy to be converted into the pressure energy of hydraulic oil by the supporting bridge piston cylinder through the transmission of mechanical energy, and open the seal groove inslot at the cylinder body piston and install the second sealing member and prevent that hydraulic oil from revealing.

(3) The outer pot head of operating handle is equipped with anti-skidding cover, and anti-skidding cover adopts rubber materials to make, adopts the anti-skidding cover that rubber materials made through the setting, can play certain anti-skidding effect, makes operation workman's hold the sense more comfortable when the operation simultaneously, is fit for permanent operation.

(4) The second check valve is installed to the inner chamber of supporting the bridge, and the second check valve is located the outside of first check valve, and the hydraulic pressure table is installed to the outer end of second check valve, and the hydraulic pressure table is located the outside of supporting the bridge, through setting up the second check valve, and its installation opposite direction with first check valve for during restriction hydraulic oil flow direction guarantees fluid and flows into the cylinder body by the oil bath outflow, through setting up first check valve, can audio-visual observation the pressure in the cylinder body.

(5) The upper end of supporting the bridge is equipped with the box gasket, and the box gasket is located the outside of oil circuit, and the upper end of box gasket contacts with the lower extreme of cylinder body, through setting up the box gasket, can strengthen the leakproofness of being connected between supporting the bridge and the cylinder body, prevents that the hydraulic oil in the oil circuit from taking place to reveal.

(6) First sealing member is installed to the right-hand member of oil circuit, and first sealing member is located the inner chamber of supporting the bridge, through setting up first sealing member, has added in the oil circuit and has sealed it by first sealing member after hydraulic oil, prevents that hydraulic oil from producing the seepage, also is convenient for simultaneously the change and the interpolation of hydraulic oil.

Drawings

FIG. 1 is a schematic cross-sectional view of the oil outlet portion of the stretcher according to the present invention;

FIG. 2 is a schematic diagram of a manual hydraulic configuration of the present invention;

FIG. 3 is a schematic cross-sectional view of the oil return portion of the stretcher of the present invention;

FIG. 4 is a schematic cross-sectional view of the oil inlet portion of the stretcher of the present invention;

fig. 5 is a schematic top view of the tank structure of the present invention.

The numbering in the figures illustrates:

1. a support bridge; 2. a vent plug screw; 3. an oil return valve; 4. a cylinder body; 5. a stretching head; 6. a cylinder piston; 7. an inner closed ring; 8. an outer closed ring; 9. a sleeve cover; 10. a threaded sleeve; 11. a gasket of the box body; 12. a first seal member; 13. an oil path; 14. pulling out a ring; 15. a cushion pad; 16. an operating handle; 17. the handle is connected with the sleeve; 18. a rocking handle; 19. a jack piston; 20. a second seal member; 21. a hydraulic gauge; 22. a first check valve; 23. a second one-way valve; 24. an anti-slip sleeve.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1-5, a bolt tensioner combined with a hydraulic jack includes a supporting bridge 1, an oil passage 13 drilled in an inner cavity of the supporting bridge 1, a vent plug 2 installed at a left end of the supporting bridge 1, an oil return valve 3 installed at a left end of the supporting bridge 1, a cylinder body 4 fixedly connected to an upper end of the supporting bridge 1, a stretching head 5 sleeved on an upper end of the cylinder body 4, a cylinder piston 6 installed in an inner cavity of the cylinder body 4, an inner sealing ring 7 installed at an inner bottom end of the cylinder body 4, an outer sealing ring 8 installed at an inner bottom end of the cylinder body 4, the outer sealing ring 8 located outside the inner sealing ring 7, a first check valve 22 installed at an upper end of the oil passage 13, a threaded sleeve 10 threadedly connected to an upper end of the supporting bridge 1, a sleeve cap 9 threadedly connected to an upper end of the threaded sleeve 10, a pull ring 14 installed at an inner bottom end of the supporting bridge 1, manual hydraulic means is installed to the outer end of supporting bridge 1, and this scheme can realize carrying out the in-process of assembling to equipment in the field, when pretensioning to great bolt, compares in traditional bolt stretcher hydraulic system, and this device transportation and operation are more convenient, are fit for carrying out pretension and dismantlement to great bolt, have improved work efficiency.

Referring to fig. 2, the manual hydraulic device includes a rocking handle 18, the lower end of the rocking handle 18 is rotatably connected with the outer end of the supporting bridge 1, the upper end of the rocking handle 18 is rotatably connected with a handle connecting sleeve 17, an inner cavity of the handle connecting sleeve 17 is sleeved with an operating handle 16, the lower end of the handle connecting sleeve 17 is rotatably connected with a jack piston 19, the outer end of the jack piston 19 is sleeved with a buffer gasket 15, the lower end of the jack piston 19 is located in an inner cavity of the threaded sleeve 10, the outer end of the jack piston 19 is sleeved with a second sealing element 20, the outer end of the second sealing element 20 is in contact with the inner wall of the threaded sleeve 10, and by arranging the manual hydraulic device, manual motive energy can be conveniently converted into pressure energy of hydraulic oil by a piston cylinder of the supporting bridge 1 through transmission of mechanical energy, and the second sealing element 20 is installed in a sealing groove formed in the cylinder body piston 6 to prevent leakage of the hydraulic oil.

Referring to fig. 2, the outer end of the operating handle 16 is sleeved with an anti-slip sleeve 24, the anti-slip sleeve 24 is made of rubber material, and the anti-slip sleeve 24 made of rubber material is arranged, so that a certain anti-slip effect can be achieved, and meanwhile, the holding feeling of an operator is more comfortable during operation, and the anti-slip device is suitable for long-term operation.

Referring to fig. 2-3, a second check valve 23 is installed in an inner cavity of the support bridge 1, the second check valve 23 is located outside the first check valve 22, a hydraulic gauge 21 is installed at an outer end of the second check valve 23, the hydraulic gauge 21 is located outside the support bridge 1, the second check valve 23 is arranged in a direction opposite to an installation direction of the first check valve 22 to limit a flowing direction of hydraulic oil to ensure that the hydraulic oil flows out of an oil pool and flows into the cylinder 4, and the pressure in the cylinder 4 can be visually observed by arranging the first check valve 22.

Referring to fig. 1 and 3, a tank gasket 11 is disposed at the upper end of the support bridge 1, the tank gasket 11 is located at the outer side of the oil path 13, the upper end of the tank gasket 11 contacts with the lower end of the cylinder 4, and the tank gasket 11 is disposed to enhance the sealing property between the support bridge 1 and the cylinder 4 and prevent the leakage of hydraulic oil in the oil path 13.

Referring to fig. 1 and 4, a first sealing element 12 is installed at the right end of the oil path 13, the first sealing element 12 is located in the inner cavity of the support bridge 1, and the first sealing element 12 is arranged to seal the oil path 13 after hydraulic oil is added to the oil path, so that leakage of the hydraulic oil is prevented, and replacement and addition of the hydraulic oil are facilitated.

In the utility model, firstly, a bolt stretcher is arranged on a bolt and the bolt is screwed into a stretching head 5, a pull ring 14 is sleeved on a nut to complete connection, a jack piston 19 moves upwards through an upward moving operating handle 16 to form local vacuum in a piston cylinder of a supporting bridge 1, hydraulic oil is sucked into the piston cylinder of the supporting bridge 1 from an oil storage tank of the supporting bridge 1 through an oil inlet 13 and a first one-way valve 22, then the operating handle 16 is pressed downwards to press the jack piston 19, the hydraulic oil in the piston cylinder of the supporting bridge 1 is pressed into a cylinder body 4 through a second one-way valve 23 and an oil outlet 13, so that the cylinder body piston 6 is pushed upwards, the stretching head 5 is pushed to move the bolt upwards, the operation is repeated until the numerical value of a hydraulic gauge 21 reaches a rated numerical value, the stretching state or pre-tightening operation is kept, and finally, an oil return valve 3 is opened to enable the hydraulic oil to flow back to a tank, 4 complete pressure release of cylinder body, the completion operation is compared with prior art, and this scheme can realize carrying out the in-process of assembling to equipment in the field, when pretensioning to great bolt, compare in traditional bolt stretcher hydraulic system, and this device transportation and operation are more convenient, are fit for carrying out pretension and dismantlement to great bolt, have improved work efficiency.

The foregoing is only a preferred embodiment of the present invention; the scope of the utility model is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. A bolt tensioner combined with a hydraulic jack, comprising a support bridge (1), characterized in that: the inner cavity of the supporting bridge (1) is provided with an oil way (13), the left end of the supporting bridge (1) is provided with a ventilating plug screw (2), the left end of the supporting bridge (1) is provided with an oil return valve (3), the right end of the oil return valve (3) penetrates through the outer end of the oil way (13), the upper end of the supporting bridge (1) is fixedly connected with a cylinder body (4), the upper end of the cylinder body (4) is provided with a stretching head (5), the inner cavity of the cylinder body (4) is provided with a cylinder body piston (6), the inner bottom end of the cylinder body (4) is provided with an inner sealing ring (7), the inner bottom end of the cylinder body (4) is provided with an outer sealing ring (8), the outer sealing ring (8) is positioned on the outer side of the inner sealing ring (7), the upper end of the oil way (13) is provided with a first one-way valve (22), the upper end of the supporting bridge (1) is in threaded connection with a threaded sleeve (10), the upper end of the threaded sleeve (10) is in threaded connection with a sleeve cover (9), a pull ring (14) is installed at the inner bottom end of the supporting bridge (1), and a manual hydraulic device is installed at the outer end of the supporting bridge (1).

2. A bolt tensioner as claimed in claim 1, in combination with a hydraulic jack, wherein: the manual hydraulic device comprises a rocking handle (18), the lower end of the rocking handle (18) is rotatably connected with the outer end of a supporting bridge (1), the upper end of the rocking handle (18) is rotatably connected with a handle connecting sleeve (17), an operating handle (16) is sleeved in an inner cavity of the handle connecting sleeve (17), a jack piston (19) is rotatably connected with the lower end of the handle connecting sleeve (17), a buffer gasket (15) is sleeved at the outer end of the jack piston (19), the lower end of the jack piston (19) is located in the inner cavity of a threaded sleeve (10), a second sealing element (20) is sleeved at the outer end of the jack piston (19), and the outer end of the second sealing element (20) is in contact with the inner wall of the threaded sleeve (10).

3. A bolt tensioner as claimed in claim 2, in combination with a hydraulic jack, wherein: the outer end of the operating handle (16) is sleeved with an anti-slip sleeve (24), and the anti-slip sleeve (24) is made of rubber materials.

4. A bolt tensioner as claimed in claim 1, in combination with a hydraulic jack, wherein: the inner chamber of supporting bridge (1) is installed second check valve (23), second check valve (23) are located the outside of first check valve (22), hydraulic pressure table (21) are installed to the outer end of second check valve (23), hydraulic pressure table (21) are located the outside of supporting bridge (1).

5. A bolt tensioner as claimed in claim 1, in combination with a hydraulic jack, wherein: the upper end of the supporting bridge (1) is provided with a box body gasket (11), the box body gasket (11) is located on the outer side of the oil circuit (13), and the upper end of the box body gasket (11) is in contact with the lower end of the cylinder body (4).

6. A bolt tensioner as claimed in claim 1, in combination with a hydraulic jack, wherein: and a first sealing element (12) is installed at the right end of the oil way (13), and the first sealing element (12) is positioned in the inner cavity of the support bridge (1).