CN214197109U

CN214197109U - Novel anchor-withdrawing jack

Info

Publication number: CN214197109U
Application number: CN202023058916.2U
Authority: CN
Inventors: 李翠平
Original assignee: Gu'an Pascal Technology Co ltd
Current assignee: Gu'an Pascal Technology Co ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-09-14
Anticipated expiration: 2030-12-18

Abstract

The utility model provides a novel move back anchor jack. According to the technical scheme, the tool anchor is arranged in the jack; when the tool anchor is tensioned, hydraulic oil enters through the oil outlet of the cylinder to push the middle cylinder to move forwards, and when the anchor withdrawing ring leaves the tool anchor, the tool anchor moves forwards and is held tightly under the action of the return spring; when the tool anchor is withdrawn from the tensioning, hydraulic oil enters through the oil port of the return cylinder, the middle cylinder moves backwards, and when the anchor withdrawing ring jacks the tool anchor, the anchor sheet of the tool anchor moves backwards and expands outwards, so that the automatic anchor withdrawing of the tool anchor is realized. Based on the above principle, the utility model discloses can realize automatic anchor and move back the anchor function automatically. The product has small volume, light weight and convenient operation and maintenance, and can effectively improve the working efficiency. The utility model discloses can use with the conventional superhigh pressure electric oil pump of part model, pnematic oil pump, manual oil pump are supporting, be a stretch-draw professional equipment that the commonality is extremely strong.

Description

Novel anchor-withdrawing jack

Technical Field

The utility model relates to a move back anchor jack technical field, concretely relates to novel move back anchor jack.

Background

The tensioning jack is a special jack for tensioning prestressed bars such as steel strand wires and the like. The tensioning jack needs to be matched with a tensioning oil pump for use, and the power for tensioning and jacking is provided by high-pressure oil of the tensioning oil pump. The jack is divided into a front clamping type jack and a center-through type jack according to different structures. The tensioning jack has compact structure, stable work during tensioning, high oil pressure and large tension force, and is widely applied to prestressed construction projects such as highway bridges, railway bridges, hydroelectric dam bodies, high-rise buildings and the like. The anchor withdrawing jack is also called a tensioning jack for withdrawing the anchor, is a special jack for detaching a prestressed anchor cable anchorage from a working surface in a coal mine tunnel, and is necessary equipment for stoping and quickly caving a goaf in the coal mine tunnel.

Before the anchor withdrawing jack is used, an anchor is required to be anchored by using a tool anchor and an anchor cable, and the anchor is required to be withdrawn after the anchor withdrawing jack is used. In the prior art, the anchoring and anchor withdrawing processes can not be automatically realized, a large amount of manual operation is required, and the overall construction efficiency is influenced to a certain extent. Under the circumstances, how to develop an anchor withdrawing jack with automatic anchoring and automatic anchor withdrawing functions has been a technical problem to be solved in the field.

Disclosure of Invention

The utility model discloses aim at to prior art's technical defect, provide a novel move back anchor jack to solve the conventionality and move back the anchor jack and do not have the technical problem of automatic anchor and move back the anchor function automatically.

In order to realize the technical purpose, the utility model adopts the following technical scheme:

a novel anchor withdrawing jack comprises an anchor withdrawing device body, an anchor withdrawing ring, an anchor cup, a tool anchor, a spring seat, a reset spring, an oil pipe compression bolt, an inner cylinder, a middle cylinder, an outer cylinder, an oil return pipe, a connecting pipe, a clamping sleeve, a screw, a cylinder returning oil inlet, a cylinder outlet oil inlet, a sealing cover, a rear cover, a clamping ring and a locking nut, wherein the anchor withdrawing ring is arranged at the front part of the anchor withdrawing device body, the anchor cup is connected with the rear end of the anchor withdrawing ring and is attached to the tool anchor, the tool anchor is arranged at the front end of the spring seat, the reset spring is arranged at the rear end of the spring seat and is pressed against the front end of the inner cylinder, the middle cylinder and the outer cylinder are sequentially arranged on the periphery of the inner cylinder, the front end of the oil return pipe is connected with the outer cylinder, the oil pipe compression bolt is arranged between the oil return pipe and the outer cylinder, a sleeve is arranged outside the oil return pipe, the oil return pipe and the oil return cylinder oil inlet are respectively connected to the front end and the rear end of the connecting pipe, the connecting pipe is positioned in the clamping sleeve, the clamping sleeve is fixedly connected to the joint seat through a screw, the cylinder outlet oil inlet is connected with the outer cylinder through the joint seat, a copper pad is arranged between the joint seat and the outer cylinder in a cushioning mode, the rear side of the outer cylinder is provided with a sealing cover, the rear end of the sealing cover is provided with a rear cover, a locking nut is arranged inside the rear cover, and a clamping ring is arranged between the rear cover and the locking nut.

Preferably, the dust-proof device further comprises a first groove body, a first dust-proof ring, a second groove body and a second dust-proof ring, wherein the first groove body and the second groove body are respectively arranged on the sealing cover, the first dust-proof ring is arranged in the first groove body, and the second dust-proof ring is arranged in the second groove body.

Preferably, the oil cylinder further comprises a third groove body, a first O-shaped ring, a fifth groove body and a check ring, wherein the third groove body and the fifth groove body are respectively arranged between the middle cylinder and the inner cylinder, the first O-shaped ring is arranged in the third groove body, and the check ring is arranged in the fifth groove body.

Preferably, the cylinder further comprises a fourth groove body, a second O-shaped ring, a sixth groove body and a third O-shaped ring, wherein the fourth groove body and the sixth groove body are respectively arranged between the outer cylinder and the middle cylinder, the second O-shaped ring is arranged in the fourth groove body, and the third O-shaped ring is arranged in the sixth groove body.

Preferably, there is a gap between the anchor cup and the tool anchor; the end of the tool anchor is pressed against the anchor withdrawing ring.

The working principle of the utility model is as follows:

1. when tensioning is carried out: hydraulic oil enters through a cylinder outlet to push the middle cylinder to move forwards, and when the anchor withdrawing ring leaves the tool anchor, the tool anchor moves forwards under the action of the return spring and holds the steel strand tightly. And the middle cylinder continuously moves forwards along with the entering of the hydraulic oil, and the steel strand begins to be stretched when the front end of the jacking device body jacks an anchor rope anchorage on the steel strand. And when the anchor is stretched to a preset load, oil supply is stopped, the load is unchanged, and at the moment, the anchor jacking pipe jacks a clamping piece in the anchor cable anchorage device into the anchor ring under the action of the spring, so that the anchorage of the anchor cable anchorage device and the steel strand is realized.

2. When the tension is withdrawn: hydraulic oil enters through a cylinder returning oil port, the middle cylinder moves backwards, after the anchor withdrawing ring is jacked to the tool anchor, the anchor sheet of the tool anchor moves backwards and expands outwards, the tightly-held steel strand is loosened, and automatic anchor withdrawing of the tool anchor is achieved.

As a special machines that dismantles coal mine tunnel prestressed anchorage cable ground tackle from the working face, the utility model discloses the anchor of the instrument of inside configuration can realize automatic anchor and move back the anchor automatically. The product has small volume, light weight and convenient operation and maintenance, and can effectively improve the working efficiency. The utility model discloses can use with YDB, STDB series superhigh pressure electric oil pump, FDB series pnematic oil pump, the supporting of SDB series manual oil pump of applicant's product, be a stretch-draw professional equipment that the commonality is extremely strong. The method can be widely applied to the fields of railways, highways, bridges, tunnels, coal mines, buildings and the like.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

in the figure:

1. an anchor withdrawing device body 2, an anchor withdrawing ring 3, an anchor cup 4 and a tool anchor

5. Spring seat 6, reset spring 7, oil pipe hold-down bolt 8, inner cylinder

9. Middle cylinder 10, outer cylinder 11, oil return pipe 12 and connecting pipe

13. Cutting sleeve 14, screw 15, cylinder return oil inlet 16 and cylinder outlet oil inlet

17. Sealing cover 18, rear cover 19, clamping ring 20 and locking nut

21. First groove body 22, first dust ring 23, second groove body 24 and second dust ring

25. A third groove 26, a first O-shaped ring 27, a fourth groove 28 and a second O-shaped ring

29. A fifth groove body 30, a retainer ring 31, a sixth groove body 32 and a third O-shaped ring

33. Gap 34, end.

Detailed Description

The following will describe in detail specific embodiments of the present invention. Well-known structures or functions may not be described in detail in the following embodiments in order to avoid unnecessarily obscuring the details. Approximating language, as used herein in the following examples, may be applied to identify quantitative representations that could permissibly vary in number without resulting in a change in the basic function. Unless defined otherwise, technical and scientific terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Example 1

A novel anchor withdrawing jack is shown in figure 1 and comprises an anchor withdrawing device body 1, an anchor withdrawing ring 2, an anchor cup 3, a tool anchor 4, a spring seat 5, a reset spring 6, an oil pipe compression bolt 7, an inner cylinder 8, a middle cylinder 9, an outer cylinder 10, an oil return pipe 11, a connecting pipe 12, a clamping sleeve 13, a screw 14, a cylinder returning oil inlet 15, a cylinder outlet oil inlet 16, a sealing cover 17, a rear cover 18, a clamping ring 19 and a locking nut 20, wherein the anchor withdrawing ring 2 is arranged at the front part of the anchor withdrawing device body 1, the anchor cup 3 is connected at the rear end of the anchor withdrawing ring 2, the anchor cup 3 is attached to the tool anchor 4, the tool anchor 4 is arranged at the front end of the spring seat 5, the reset spring 6 is pressed at the front end of the inner cylinder 8, the middle cylinder 9 and the outer cylinder 10 are sequentially arranged at the periphery of the inner cylinder 8, the front end of the oil return pipe 11 is connected with the outer cylinder 10, the oil pipe compression bolt 7 is arranged between the oil return pipe 11 and the outer cylinder 10, the oil return pipe 11 is externally provided with a sleeve, the oil return pipe 11 and a cylinder return oil inlet 15 are respectively connected to the front end and the rear end of the connecting pipe 12, the connecting pipe 12 is positioned in a clamping sleeve 13, the clamping sleeve 13 is fixedly connected to a joint seat through a screw 14, an oil outlet 16 of the cylinder is connected with the outer cylinder 10 through the joint seat, a copper gasket is arranged between the joint seat and the outer cylinder 10 in a cushioning manner, a sealing cover 17 is arranged on the rear side of the outer cylinder 10, a rear cover 18 is arranged at the rear end of the sealing cover 17, a locking nut 20 is arranged inside the rear cover 18, and a clamping ring 19 is arranged between the rear cover 18 and the locking nut 20.

The main performance parameters of the anchor withdrawing jack are shown in the following table 1:

TABLE 1 Main technical Performance parameters

Rated oil pressure	70MPa	Diameter of the perforation	25mm
				Rated tension force	520kN	Structural form	Double action
Bearing area	75.6cm²	Weight (D)	35kg
				Working stroke	120mm	Hydraulic oil designation	No. 32 hydraulic oil

The relationship between the jack tension value and the oil pump pressure gauge reading is as follows:

tensile force (kN) ═ 7.5 × pressure gauge reading (MPa).

The operation procedure of the anchor withdrawing jack is as follows:

1. an SDB manual oil pump (or an FDB pneumatic oil pump, an YDB and STDB series ultrahigh pressure electric oil pump) is prepared, oil outlets of an oil outlet cylinder and an oil return cylinder of the tensioning jack are well connected with oil outlets and oil return ports of the oil pump through a high-pressure rubber pipe with a quick connector, and a middle cylinder of the jack is retracted to the bottom by moving an oil pump operation valve handle.

2. An operator holds the tensioning jack to enter an operation area, penetrates a required tensioning steel strand into a center hole of the jack, enables a top pressing device of the jack to be in contact with an anchor rope anchorage, moves a handle of an oil pump operation valve to one direction, supplies oil to a jack oil cylinder, discharges the cylinder from the jack middle cylinder, and automatically holds the steel strand tightly by a built-in tool anchor and starts tensioning. When the tension reaches a preset tension value, the oil pump operation valve handle is moved, oil supply is stopped, and the anchor rope anchorage device realizes anchoring. The corresponding relation value between the jack tension value and the pressure gauge is shown in the following table:

TABLE 2 corresponding relation value between jack tension force value and pressure gage

Tension value (kN)	263	300	338	375	413	450	488	525
									Pressure gauge reading (MPa)	35	40	45	50	55	60	65	70

3. And after the tensioning is finished, the handle of the oil pump operation valve is reversely moved, the middle cylinder of the jack returns to the cylinder, and after the middle cylinder of the jack reaches the bottom, the jack automatically loosens the steel strand. And (4) replacing the handle of the oil pump operating valve to the middle position, withdrawing the tensioning jack from the steel strand by an operator, operating according to the steps again, and performing the operation at the next place.

Example 2

Meanwhile, the dust-proof device further comprises a first groove body 21, a first dust-proof ring 22, a second groove body 23 and a second dust-proof ring 24, wherein the first groove body 21 and the second groove body 23 are respectively arranged on the sealing cover 17, the first dust-proof ring 22 is arranged in the first groove body 21, and the second dust-proof ring 24 is arranged in the second groove body 23. The oil cylinder further comprises a third groove body 25, a first O-shaped ring 26, a fifth groove body 29 and a check ring 30, wherein the third groove body 25 and the fifth groove body 29 are respectively arranged between the middle cylinder 9 and the inner cylinder 8, the first O-shaped ring 26 is arranged in the third groove body 25, and the check ring 30 is arranged in the fifth groove body 29. The cylinder is characterized by further comprising a fourth groove body 27, a second O-shaped ring 28, a sixth groove body 31 and a third O-shaped ring 32, wherein the fourth groove body 27 and the sixth groove body 31 are respectively arranged between the outer cylinder 10 and the middle cylinder 9, the second O-shaped ring 28 is arranged in the fourth groove body 27, and the third O-shaped ring 32 is arranged in the sixth groove body 31. A gap 33 is provided between the anchor cup 3 and the tool anchor 4; the head 34 of the tool anchor 4 is pressed against the anchor withdrawal ring 2.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel anchor withdrawing jack is characterized by comprising an anchor withdrawing device body (1), an anchor withdrawing ring (2), an anchor cup (3), a tool anchor (4), a spring seat (5), a reset spring (6), an oil pipe compression bolt (7), an inner cylinder (8), a middle cylinder (9), an outer cylinder (10), an oil return pipe (11), a connecting pipe (12), a clamping sleeve (13), a screw (14), a cylinder returning oil inlet (15), a cylinder outlet oil inlet (16), a sealing cover (17), a rear cover (18), a clamping ring (19) and a locking nut (20), wherein the anchor withdrawing ring (2) is arranged at the front part of the anchor withdrawing device body (1), the anchor cup (3) is connected at the rear end of the anchor withdrawing ring (2), the anchor cup (3) is attached to the tool anchor (4), the tool anchor (4) is arranged at the front end of the spring seat (5), the reset spring (6) is arranged at the rear end of the spring seat (5), and the reset spring (6) is pressed at the front end of the inner cylinder (8), a middle cylinder (9) and an outer cylinder (10) are sequentially arranged on the periphery of an inner cylinder (8), the front end of an oil return pipe (11) is connected with the outer cylinder (10), an oil pipe compression bolt (7) is arranged between the oil return pipe (11) and the outer cylinder (10), a sleeve is arranged outside the oil return pipe (11), the oil return pipe (11) and an oil inlet (15) of the oil return pipe are respectively connected to the front end and the rear end of a connecting pipe (12), the connecting pipe (12) is positioned in a clamping sleeve (13), the clamping sleeve (13) is fixedly connected onto a joint seat through a screw (14), an oil inlet (16) of the oil outlet cylinder is connected with the outer cylinder (10) through the joint seat, a copper pad is padded between the joint seat and the outer cylinder (10), a sealing cover (17) is arranged on the rear side of the outer cylinder (10), a rear cover (18) is arranged at the rear end of the sealing cover (17), and a locking nut (20) is arranged inside the rear cover (18), a snap ring (19) is arranged between the rear cover (18) and the lock nut (20).

2. The novel anchor withdrawing jack as claimed in claim 1, further comprising a first groove body (21), a first dust ring (22), a second groove body (23) and a second dust ring (24), wherein the first groove body (21) and the second groove body (23) are respectively arranged on the sealing cover (17), the first dust ring (22) is arranged in the first groove body (21), and the second dust ring (24) is arranged in the second groove body (23).

3. The novel anchor withdrawing jack as claimed in claim 1, further comprising a third groove body (25), a first O-shaped ring (26), a fifth groove body (29) and a retainer ring (30), wherein the third groove body (25) and the fifth groove body (29) are respectively arranged between the middle cylinder (9) and the inner cylinder (8), the first O-shaped ring (26) is arranged in the third groove body (25), and the retainer ring (30) is arranged in the fifth groove body (29).

4. The novel anchor withdrawing jack as claimed in claim 1, further comprising a fourth slot (27), a second O-ring (28), a sixth slot (31), and a third O-ring (32), wherein the fourth slot (27) and the sixth slot (31) are respectively disposed between the outer cylinder (10) and the middle cylinder (9), the second O-ring (28) is disposed in the fourth slot (27), and the third O-ring (32) is disposed in the sixth slot (31).

5. A new anchor handling jack as claimed in claim 1, wherein there is a gap (33) between the anchor cup (3) and the tool anchor (4); the end head (34) of the tool anchor (4) is pressed on the anchor withdrawing ring (2).