CN215558641U

CN215558641U - Front clamping type jack

Info

Publication number: CN215558641U
Application number: CN202121418164.8U
Authority: CN
Inventors: 肖璐明; 周晓杨; 邓仁堂; 刘新平
Original assignee: Wuhan Simutech Co ltd
Current assignee: Wuhan Simutech Co ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2022-01-18
Anticipated expiration: 2031-06-24

Abstract

The utility model relates to a front clamping type jack, which comprises a cylinder barrel, a piston, a front end sealing assembly and a rear end sealing assembly, wherein the cylinder barrel is provided with a cylinder head; the piston is arranged in the cylinder barrel in a sliding mode, and the front portion of the piston is located outside the cylinder barrel; the front end sealing assembly comprises a front end gland and a front end sealing cover, and the front end gland is stacked with the front end sealing cover, is sleeved on the front part of the piston in a sealing sliding manner and is connected with the front end of the cylinder barrel in a sealing manner; the rear end sealing assembly comprises a rear end gland and a rear end sealing cover, and the rear end gland and the rear end sealing cover are stacked and are sleeved on the rear portion of the piston in a sealing and sliding mode and are connected with the rear end of the cylinder barrel in a sealing mode. According to the front clamping type jack, the cylinder barrel is sealed by the end covers consisting of the gland and the sealing covers at the front end and the rear end of the cylinder barrel, the sealing effect is greatly improved, and the problem of oil leakage is avoided.

Description

Front clamping type jack

Technical Field

The utility model relates to a jack, in particular to a front clamping type jack.

Background

The front clamping type jacks are generally adopted as the tensioning jack schemes in the process of the prestressed bridge tensioning test so as to reduce the waste of steel strands, and the front clamping type jacks of all the schemes have the common characteristic that a tool anchor and a tool clamping piece are sunk into the jacks, so that the distance from the working anchor to the tool anchor is reduced, and the effect of reducing the reserved amount of the steel strands is realized.

However, in the existing front clamping type jack, the end covers at the front end and the rear end of the cylinder barrel of the jack adopt a layer of front end cover and a layer of rear end cover to seal the cylinder barrel, and the sealing structure can leak oil when stressed, so that the sealing effect is poor, and the pre-stressed bridge tensioning test is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a front clamping type jack, which has a sealing effect greatly improved compared with the existing front clamping type jack and avoids oil leakage.

The technical scheme for solving the technical problems is as follows: a front clamping type jack comprises a cylinder barrel, a piston, a front end sealing assembly and a rear end sealing assembly; the piston is arranged in the cylinder barrel in a sliding mode, and the front portion of the piston is located outside the cylinder barrel; the front end sealing assembly comprises a front end gland and a front end sealing cover, and the front end gland is stacked with the front end sealing cover, is sleeved on the front part of the piston in a sealing sliding manner and is connected with the front end of the cylinder barrel in a sealing manner; the rear end sealing assembly comprises a rear end gland and a rear end sealing cover, and the rear end gland and the rear end sealing cover are stacked and are sleeved on the rear portion of the piston in a sealing and sliding mode and are connected with the rear end of the cylinder barrel in a sealing mode.

On the basis of the technical scheme, the utility model can be further improved as follows.

Furthermore, the front end press cover is close to the outside relative to the front end sealing cover, and the rear end press cover is close to the outside relative to the rear end sealing cover.

Further, a first dustproof ring is arranged between the front end gland and the front portion of the piston, and/or a second dustproof ring is arranged between the rear end gland and the rear portion of the piston.

Further, a first square ring for a shaft is arranged between the front end sealing cover and the front part of the piston, and/or a second square ring for a shaft is arranged between the rear end sealing cover and the rear part of the piston.

Furthermore, the front end gland and the front end sealing cover are clamped in the port at the front end of the cylinder barrel, and the rear end gland and the rear end sealing cover are clamped in the port at the rear end of the cylinder barrel.

Further, a first O-shaped sealing ring is arranged between the front end sealing cover and the inner wall of the cylinder barrel, and/or a second O-shaped sealing ring is arranged between the rear end sealing cover and the inner wall of the cylinder barrel.

Further, the outer diameter of the front part of the piston is smaller than the outer diameter of the rear part of the piston, the joint of the front part and the rear part of the piston is a protruding structure attached to the inner wall of the cylinder barrel, and the protruding structure is limited in the cylinder barrel by the front end sealing assembly and the rear end sealing assembly.

Furthermore, a combined sealing ring for holes is arranged between the protruding structure and the inner wall of the cylinder barrel.

Furthermore, an oil pipe joint is arranged on the wall of the cylinder barrel and communicated into the cylinder barrel.

The utility model has the beneficial effects that: according to the front clamping type jack, the cylinder barrel is sealed by the end covers consisting of the gland and the sealing covers at the front end and the rear end of the cylinder barrel, the sealing effect is greatly improved, and the problem of oil leakage is avoided.

Drawings

Fig. 1 is a cross-sectional view of a front-clamping jack according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the cylinder barrel, 2, a piston, 3, a front end sealing assembly, 31, a front end gland, 32, a front end sealing cover, 4, a rear end sealing assembly, 41, a rear end gland, 42, a rear end sealing cover, 51, a first dust ring, 52, a second dust ring, 61, a square ring for a first shaft, 62, a square ring for a second shaft, 71, a first O-shaped sealing ring, 72, a second O-shaped sealing ring, 8, a combined sealing ring for a hole, and 9, an oil pipe joint.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1, a front clamping jack comprises a cylinder barrel 1, a piston 2, a front end sealing assembly 3 and a rear end sealing assembly 4; the piston 2 is slidably mounted in the cylinder barrel 2, and the front part of the piston 4 is positioned outside the cylinder barrel 1; the front end sealing assembly 3 comprises a front end gland 31 and a front end sealing cover 32, wherein the front end gland 31 and the front end sealing cover 32 are stacked and are sleeved on the front part of the piston 2 in a sealing and sliding manner and are connected with the front end of the cylinder barrel 1 in a sealing manner; the rear end sealing assembly 4 comprises a rear end gland 41 and a rear end sealing cover 42, wherein the rear end gland 41 and the rear end sealing cover 42 are stacked and are sleeved on the rear part of the piston 2 in a sealing and sliding manner and are connected with the rear end of the cylinder barrel 1 in a sealing manner.

According to the front clamping type jack, the cylinder barrel is sealed by the end covers consisting of the pressing cover and the sealing covers at the front end and the rear end of the cylinder barrel, namely the front end cover and the rear end cover of the original front clamping type jack are divided into two parts, namely a two-layer sealing structure is adopted, the sealing effect is greatly improved, and the problem of oil leakage is avoided.

In this particular embodiment:

the front end cover 31 is located outward relative to the front end cover 32, and the rear end cover 41 is located outward relative to the rear end cover 42.

A first dust ring 51 is arranged between the front end gland 31 and the front part of the piston 2, and/or a second dust ring 52 is arranged between the rear end gland 41 and the rear part of the piston 2. A first square shaft ring 61 is arranged between the front end sealing cover 32 and the front part of the piston 2, and/or a second square shaft ring 62 is arranged between the rear end sealing cover 42 and the rear part of the piston 2.

The front end press cover 31 and the front end sealing cover 32 are clamped in the port at the front end of the cylinder barrel 1, and the rear end press cover 41 and the rear end sealing cover 42 are clamped in the port at the rear end of the cylinder barrel 1.

A first O-ring 71 is arranged between the front end sealing cover 32 and the inner wall of the cylinder barrel 1, and/or a second O-ring 72 is arranged between the rear end sealing cover 42 and the inner wall of the cylinder barrel 1.

The outer diameter of the front part of the piston 2 is smaller than that of the rear part of the piston 2, the joint of the front part and the rear part of the piston 2 is a protruding structure attached to the inner wall of the cylinder barrel 1, and the protruding structure is limited in the cylinder barrel 1 by the front end sealing assembly 3 and the rear end sealing assembly 4.

The front outer diameter of the piston 2 is smaller than the rear outer diameter of the piston 2, the front end of the piston 2 extends out of the cylinder barrel 1, the structural design is suitable for an integral structure consisting of a jack rear baffle, a jack outer barrel, a jack front baffle, a force measuring sensor and a limiting plate mounting seat, and steel strands can be saved

And a combined sealing ring 8 for holes is arranged between the protruding structure and the inner wall of the cylinder barrel 1.

An oil pipe joint 9 is arranged on the wall of the cylinder barrel 1, and the oil pipe joint 9 is communicated into the cylinder barrel 1.

The first dust seal ring 51, the second dust seal ring 52, the first shaft square ring 61, the second shaft square ring 62, the first O-ring 71, the second O-ring 72 and the hole combination seal ring 8 in the utility model all play a role in sealing, and can further improve the sealing effect.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A front clamping type jack is characterized in that: comprises a cylinder barrel (1), a piston (2), a front end sealing component (3) and a rear end sealing component (4); the piston (2) is arranged in the cylinder barrel (2) in a sliding mode, and the front portion of the piston (4) is located outside the cylinder barrel (1); the front end sealing assembly (3) comprises a front end gland (31) and a front end sealing cover (32), wherein the front end gland (31) and the front end sealing cover (32) are stacked, hermetically and slidably sleeved on the front part of the piston (2) and hermetically connected with the front end of the cylinder barrel (1); the rear end sealing assembly (4) comprises a rear end pressing cover (41) and a rear end sealing cover (42), wherein the rear end pressing cover (41) and the rear end sealing cover (42) are stacked and are sleeved on the rear portion of the piston (2) in a sealing and sliding mode, and the rear end sealing assembly is connected with the rear end of the cylinder barrel (1) in a sealing mode.

2. The front jack as claimed in claim 1, wherein: the front end gland (31) is close to the outside relative to the front end sealing cover (32), and the rear end gland (41) is close to the outside relative to the rear end sealing cover (42).

3. The front jack as claimed in claim 1, wherein: a first dustproof ring (51) is arranged between the front end pressing cover (31) and the front part of the piston (2), and/or a second dustproof ring (52) is arranged between the rear end pressing cover (41) and the rear part of the piston (2).

4. The front jack as claimed in claim 1, wherein: a first square ring (61) for a shaft is arranged between the front end sealing cover (32) and the front part of the piston (2), and/or a second square ring (62) for a shaft is arranged between the rear end sealing cover (42) and the rear part of the piston (2).

5. The front jack as claimed in claim 1, wherein: the front end gland (31) and the front end sealing cover (32) are clamped in the port at the front end of the cylinder barrel (1), and the rear end gland (41) and the rear end sealing cover (42) are clamped in the port at the rear end of the cylinder barrel (1).

6. The front jack as claimed in claim 5, wherein: a first O-shaped sealing ring (71) is arranged between the front end sealing cover (32) and the inner wall of the cylinder barrel (1), and/or a second O-shaped sealing ring (72) is arranged between the rear end sealing cover (42) and the inner wall of the cylinder barrel (1).

7. The front jack as claimed in any one of claims 1 to 6, wherein: the outer diameter of the front part of the piston (2) is smaller than the outer diameter of the rear part of the piston (2), the joint of the front part and the rear part of the piston (2) is a protruding structure attached to the inner wall of the cylinder barrel (1), and the protruding structure is limited in the cylinder barrel (1) by the front end sealing assembly (3) and the rear end sealing assembly (4).

8. The front jack as claimed in claim 7, wherein: and a combined sealing ring (8) for holes is arranged between the protruding structure and the inner wall of the cylinder barrel (1).

9. The front jack as claimed in any one of claims 1 to 6, wherein: an oil pipe joint (9) is arranged on the wall of the cylinder barrel (1), and the oil pipe joint (9) is communicated into the cylinder barrel (1).