CN211967371U

CN211967371U - Interchangeability protection connection type hydraulic stretcher

Info

Publication number: CN211967371U
Application number: CN202020017885.7U
Authority: CN
Inventors: 陈涛; 孟华娟
Original assignee: SHANGHAI BENAN INDUSTRIAL DEVELOPMENT CO LTD
Current assignee: SHANGHAI BENAN INDUSTRIAL DEVELOPMENT CO LTD
Priority date: 2020-01-06
Filing date: 2020-01-06
Publication date: 2020-11-20
Anticipated expiration: 2030-01-06

Abstract

The utility model discloses an interchangeability protection connection formula hydraulic pressure elongator, including casing, sleeve pipe and slider, I shape annular groove has been seted up to the upper surface of casing, and the upper and lower inner wall of this I shape annular groove sliding connection has slider and sleeve pipe respectively, the last fixed surface of casing is connected with the apron, the echelonment annular groove has been seted up to the upper surface of slider, and fixed surface is connected with on the first layer of this echelonment annular groove and rocks the spring, rock the other end fixedly connected with axle sleeve of spring, the inner wall fixedly connected with bolt sleeve of axle sleeve. According to the interchangeability protection connection type hydraulic stretcher, the rocking spring and the shaft sleeve are arranged, so that when a bolt is not perpendicular to an installation surface, the small angle between the bolt and the installation surface is compensated by the small-amplitude tilt of the rocking spring, the damage of screw threads in the bolt and the bolt sleeve is avoided, and the interchangeability protection connection type hydraulic stretcher is protected.

Description

Interchangeability protection connection type hydraulic stretcher

Technical Field

The utility model relates to a hydraulic stretcher technical field specifically is an interchangeability protection connection type hydraulic stretcher.

Background

The hydraulic bolt tensioner is called as a hydraulic tensioner for short and has the functions of fastening and dismounting bolts. The method can be widely applied to industries such as metallurgical mines, petrochemical industry, ship industry, electric power systems, rolling stocks, heavy machinery and the like. The bolt is stretched in the elastic deformation area by the aid of hydraulic power provided by the ultra-high pressure pump and the elastic amplitude allowed by materials, and the purpose of fastening or detaching the bolt is achieved. In addition, the device can be used as a device for applying axial force by hydraulic interference connection to perform jacking installation. Particularly, in the working environment with serious pollution or limited space area, the hydraulic stretching device is difficult to replace by any other tool, is ideal technological equipment for assembling large and medium-sized mechanical products and maintaining equipment, and greatly improves the construction working efficiency.

The installation plane is often uneven, so that the bolt is not perpendicular to the installation plane, and the gap between a hole and a shaft of a hydraulic stretcher on the market is small, so that the bolt and the thread of the hydraulic stretcher are deformed and damaged due to stretching, the hydraulic stretcher cannot be used, and certain loss is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an interchangeability protection connection formula hydraulic stretcher to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: an interchangeable protective connection type hydraulic stretcher comprises a shell, a sleeve and a slide block, wherein the upper surface of the shell is provided with an I-shaped annular groove, the upper inner wall and the lower inner wall of the I-shaped annular groove are respectively connected with a sliding block and a sleeve in a sliding way, the upper surface of the shell is fixedly connected with a cover plate, the upper surface of the sliding block is provided with a step-shaped annular groove, and the upper surface of the first layer of the ladder-shaped annular groove is fixedly connected with a shaking spring, the other end of the shaking spring is fixedly connected with a shaft sleeve, the inner wall of the shaft sleeve is fixedly connected with a bolt sleeve, the opposite surfaces of the cover plate and the sliding block are fixedly connected with a return spring, the inner wall of the sleeve is provided with a nut sleeve, the side surface of the shell is fixedly connected with a pressure regulating valve, and the discharge end of the pressure regulating valve penetrates through the side surface of the shell and extends into an annular cavity formed between the shell and the sliding block.

Preferably, the number of the rocking springs and the number of the return springs are twelve, and the twelve rocking springs and the twelve return springs are arranged on the surface of the sliding block at equal intervals.

Preferably, the side surface of the sleeve is provided with a through groove extending to the inner wall of the sleeve.

Preferably, the surface of the nut sleeve is provided with six through holes extending to the inner wall of the nut sleeve, and the inner wall of each through hole is fixedly connected with a locking rod.

Preferably, the inner wall of the bolt sleeve is provided with a thread groove matched with the thread of an external bolt, and the inner wall of the nut sleeve is provided with a regular hexagonal groove matched with an external nut.

Preferably, an O-shaped sealing ring is arranged between the sliding block and the shell and made of rubber, and one end, far away from the shell, of the pressure regulating valve is connected with an external hydraulic station.

Advantageous effects

The utility model provides an interchangeability protection connection formula hydraulic stretcher possesses following beneficial effect:

1. this interchangeability protection connection formula hydraulic pressure elongator, through setting up the bolt sleeve, axle sleeve and slider, be convenient for when outside hydraulic pressure station provides the oil pressure, the slider can drive bolt upward movement of bolt sleeve threaded connection, through setting up nut sleeve and check lock lever, when being convenient for bolt upward movement, rotate nut sleeve through the check lock lever and screw up or unscrew the nut, through setting up reset spring, when the oil pressure disappears in the annular cavity that forms between casing and the slider, the slider of being convenient for resets, through setting up the air-vent valve, when being convenient for switch different specification bolt operations, can be according to the rated tension adjustment oil pressure of bolt, avoid pulling the bolt bad.

2. According to the interchangeability protection connection type hydraulic stretcher, the nut sleeve and the bolt sleeve are arranged, and the nut sleeve and the bolt sleeve are provided with a series of products with the same outer diameter and different specifications, so that the interchangeability protection connection type hydraulic stretcher has the characteristics of universality and interchangeability.

Drawings

FIG. 1 is a schematic view of a front cross-sectional structure of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a perspective view of the sleeve;

FIG. 4 is a perspective view of a bolt sleeve;

fig. 5 is a schematic perspective view of the nut socket.

In the figure: the device comprises a shell 1, a sleeve 2, a slide block 3, a cover plate 4, a shaking spring 5, a shaft sleeve 6, a bolt sleeve 7, a return spring 8, a nut sleeve 9, a pressure regulating valve 10, a locking rod 11 and a sealing ring 12O-shaped.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: an interchangeability protection connection type hydraulic stretcher comprises a shell 1, a sleeve 2 and a sliding block 3, wherein an I-shaped annular groove is formed in the upper surface of the shell 1, the upper inner wall and the lower inner wall of the I-shaped annular groove are respectively connected with the sliding block 3 and the sleeve 2 in a sliding mode, a through groove extending to the inner wall of the sleeve 2 is formed in the side face of the sleeve 2, an O-shaped sealing ring 12 is arranged between the sliding block 3 and the shell 1, the O-shaped sealing ring 12 is made of rubber materials, and the sealing performance of the interchangeability protection connection type hydraulic stretcher is improved by arranging the O-shaped sealing ring 12.

Casing 1's last fixed surface is connected with apron 4, echelonment annular groove has been seted up to slider 3's upper surface, and this echelonment annular groove's first layer upper surface fixed surface is connected with rocks spring 5, rock spring 5's other end fixedly connected with axle sleeve 6, axle sleeve 6's inner wall fixedly connected with bolt sleeve 7, bolt sleeve 7's inner wall set up with the thread groove of outside bolt screw thread looks adaptation, through setting up bolt sleeve 7, axle sleeve 6 and slider 3, be convenient for when outside hydraulic pressure station provides the oil pressure, slider 3 can drive bolt sleeve 7 threaded connection's bolt up-motion.

Through setting up and rocking spring 5 and axle sleeve 6, be convenient for when the bolt is out of plumb with the installation face, rock the small-amplitude slope of spring 5 and remove the compensation bolt and the installation face and exist the low-angle to avoid the screw thread damage in bolt and the bolt sleeve 7, protected this interchangeability protection connection formula hydraulic pressure elongator.

The opposite face fixedly connected with reset spring 8 of apron 4 and slider 3 rocks spring 5 and the quantity of reset spring 8 and is twelve, and twelve rocks spring 5 and the equal global equidistance setting of reset spring 8 and set up on the surface of slider 3, through setting up reset spring 8, is convenient for when the oil pressure disappears in the annular cavity that forms between casing 1 and the slider 3, and the slider 3 of being convenient for resets.

The inner wall of sleeve pipe 2 is provided with nut sleeve 9, and the regular hexagon groove with outside nut looks adaptation is seted up to nut sleeve 9's inner wall, and six through-holes that extend to nut sleeve 9 inner wall are seted up on nut sleeve 9's surface, and the inner wall fixedly connected with check lock lever 11 of this through-hole, through setting up nut sleeve 9 and check lock lever 11, when the bolt upward movement of being convenient for, rotate nut sleeve 9 through check lock lever 11 and screw up or unscrew the nut.

By arranging the nut sleeve 9 and the bolt sleeve 7, the nut sleeve 9 and the bolt sleeve 7 both have a series of products with the same outer diameter and different specifications, so that the interchangeability protection connection type hydraulic tensioner has the characteristics of universality and interchangeability.

The side fixedly connected with air-vent valve 10 of casing 1, and the discharge end of air-vent valve 10 runs through the side of casing 1 and extends to the annular cavity of constituteing between casing 1 and the slider 3 in, and the one end that the casing 1 was kept away from to air-vent valve 10 is connected with outside hydraulic pressure station, through setting up air-vent valve 10, is convenient for when switching different specification bolt operations, can be according to the rated tension adjustment oil pressure of bolt, avoids pulling the bolt bad.

The working principle is as follows: when the interchangeability protection connection type hydraulic stretcher is used, firstly, the specification of a nut needing to be screwed or unscrewed is verified, then a corresponding nut sleeve 9 and a corresponding bolt sleeve 7 are found for standby application, the nut sleeve 9 is sleeved on the outer side of the nut, the sleeve 2 is placed on the outer side of the nut sleeve 9, then the shell 1 is placed above the sleeve 2, the bolt sleeve 7 is in threaded connection with a bolt, the bolt sleeve 7 is screwed and is overlapped with the shaft sleeve 6, one end of the pressure regulating valve 10 is connected with an external hydraulic station, the pressure regulating valve 10 is set according to the type of the bolt, the hydraulic station is started, the slide block 3 slides upwards on the inner wall of the shell 1 by oil pressure, the shaft sleeve 6 and the bolt sleeve 7 are driven to move upwards, the bolt is tightened, the nut sleeve 9 is driven to rotate by inserting the locking rod 11 into a through hole on the surface of the nut sleeve 9, so that the nut is screwed or unscrew, the slider 3 is reset under the action of the reset spring 8, then the bolt sleeve 7 is screwed, the operation is repeated, finally the bolt and the nut are screwed or unscrewed, when the bolt is not perpendicular to the mounting surface, the spring 5 is shaken to enable the shaft sleeve 6 to incline by a small angle, so that the tiny angle between the bolt and the mounting surface is compensated, the interchangeability protection connection type hydraulic stretcher is used, the oil pressure, the bolt sleeve 7 and the nut sleeve 9 can be adjusted according to bolts of different specifications, and the interchangeability protection connection type hydraulic stretcher can be protected when the mounting surface is not perpendicular to the bolt.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an interchangeability protection connection formula hydraulic stretcher, includes casing (1), sleeve pipe (2) and slider (3), its characterized in that: the upper surface of casing (1) has seted up I shape annular groove, and the upper and lower inner wall of this I shape annular groove sliding connection respectively has slider (3) and sleeve pipe (2), the last fixed surface of casing (1) is connected with apron (4), the echelonment annular groove has been seted up to the upper surface of slider (3), and the fixed surface is connected with on the first floor of this echelonment annular groove and rocks spring (5), rock the other end fixedly connected with axle sleeve (6) of spring (5), the inner wall fixedly connected with bolt sleeve (7) of axle sleeve (6), the opposite face fixedly connected with reset spring (8) of apron (4) and slider (3), the inner wall of sleeve pipe (2) is provided with nut sleeve (9), the side fixedly connected with air-vent valve (10) of casing (1), and the discharge end of air-vent valve (10) runs through the side of casing (1) and extends to the casing (1) and slider (3) between constitute In the annular cavity.

2. An interchangeability protected connection hydraulic tensioner according to claim 1, characterised in that: the number of the rocking springs (5) and the number of the return springs (8) are twelve, and twelve rocking springs (5) and twelve return springs (8) are arranged on the surface of the sliding block (3) at equal intervals.

3. An interchangeability protected connection hydraulic tensioner according to claim 1, characterised in that: the side surface of the sleeve (2) is provided with a through groove extending to the inner wall of the sleeve (2).

4. An interchangeability protected connection hydraulic tensioner according to claim 1, characterised in that: six through holes extending to the inner wall of the nut sleeve (9) are formed in the surface of the nut sleeve (9), and a locking rod (11) is fixedly connected to the inner wall of each through hole.

5. An interchangeability protected connection hydraulic tensioner according to claim 1, characterised in that: the inner wall of the bolt sleeve (7) is provided with a thread groove matched with the external bolt thread, and the inner wall of the nut sleeve (9) is provided with a regular hexagonal groove matched with the external nut.

6. An interchangeability protected connection hydraulic tensioner according to claim 1, characterised in that: an O-shaped sealing ring (12) is arranged between the sliding block (3) and the shell (1), the O-shaped sealing ring (12) is made of rubber, and one end, far away from the shell (1), of the pressure regulating valve (10) is connected with an external hydraulic station.