Anchor withdrawing device with tool anchor replaced later

Abstract

The utility model relates to the technical field of anchor retreating devices, and discloses an anchor retreating device with a tool anchor replaced later, which comprises an anchor retreating device body, a middle cylinder, an anchor retreating ring, an inner cylinder, a tool anchor, a reset spring seat, a reset spring and a tool anchor plug, the middle cylinder is fixedly connected to the outer wall of the anchor retreating device body, and the anchor retreating ring is in threaded connection with the inner wall of the anchor retreating device body; according to the utility model, the tool anchor can be pushed to move backwards by screwing the anchor withdrawing ring, so that the diameter of the middle of the tool anchor is increased, when the middle cylinder drives the anchor withdrawing device body to move, the tool anchor moves forwards under the action of the reset spring, an inner hole is shrunk to hold a steel strand, and when the tool anchor is replaced, the tool anchor is replaced by the reset spring. The tool anchor can be taken out for replacement only by operating the anchor withdrawing ring to change the interaction between the anchor withdrawing ring and the tool anchor, complicated disassembly and boosting operation is not needed, the replacement efficiency of the tool anchor is greatly improved, the construction difficulty is reduced, and smooth anchor withdrawing operation is guaranteed.

Description

Technical Field

[0001] This application relates to the field of anchor removal technology, and in particular to an anchor removal device of the rear-mounted tool anchor type. Background Technology

[0002] As coal mining progresses, the original support is no longer suitable for the new roadway deformation. The anchoring force of the anchor cable puts the surrounding rock of the roadway in a certain stress state. The construction without anchor removal is difficult. In coal mine roadway back mining and goaf area, the roof must be caving. First of all, the anchor cable and anchorage must be removed from the working face.

[0003] In coal mine roadway support construction, whether it is the jack for prestressing steel strands or the anchor remover for anchor removal, the structural type is that the tool anchor is placed in front. The tool anchor needs to be replaced frequently. When replacing it, the anchor remover body must be disassembled first, and then the anchor cup must be disassembled with a special tool. If the thread is too tight, it is easy to rotate with the inner cylinder during disassembly. At this time, the anchor remover must be connected to an oil pump for pressurization, which makes the work cumbersome. Therefore, an anchor remover with a tool anchor replaced later is proposed to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a removable anchor of the type of rear-mounted tool anchor to solve the problems mentioned in the background art.

[0005] The technical solution for a post-replacement tool anchor type anchor puller provided in this application is as follows:

[0006] An anchor remover of the rear-mounted tool anchor type includes an anchor remover body, a central cylinder, an anchor remover ring, an inner cylinder, a tool anchor, a return spring seat, a return spring, and a tool anchor plug. The central cylinder is fixedly connected to the outer wall of the anchor remover body. The anchor remover ring is threadedly connected to the inner wall of the anchor remover body. The inner cylinder is sleeved on the outer wall of the anchor remover ring. The tool anchor is installed inside the inner cylinder and consists of three pieces. The return spring seat is located at one end of the plurality of tool anchors away from the anchor remover ring. The return spring is sleeved on the outer wall of the return spring seat. The tool anchor plug is movably connected to the outer wall of the return spring seat and threadedly connected to the inner wall of the inner cylinder. The return spring is located between the return spring seat and the tool anchor plug.

[0007] Preferably, it also includes a sealing cap and an outer cylinder. The sealing cap is sleeved on the outer wall of the inner cylinder, and the outer cylinder is installed on the outer wall of the middle cylinder. The sealing cap is located between the outer cylinder and the inner cylinder and abuts against the end of the middle cylinder away from the anchor release body, for sealing the outer cylinder and the inner cylinder.

[0008] Preferably, it also includes a rear cover, which is threadedly connected to the inner wall of the outer cylinder and abuts against the outer wall of the sealing cover at the end away from the middle cylinder.

[0009] Preferably, when the anchor release ring is screwed to a certain position, the pushing tool anchor moves backward, and the middle diameter of the tool anchor increases.

[0010] Preferably, when the middle cylinder drives the anchor release body to move, the tool anchor moves forward under the action of the reset spring, and the inner hole of the tool anchor shrinks.

[0011] In summary, the present application has the following beneficial technical effects:

[0012] 1. Compared with the traditional anchor release device, the anchor release device of the present application effectively reduces the assembly strength and the weight of the anchor release device by combining multiple parts into one, which can significantly reduce the labor intensity of workers in the actual coal mining and roadway surrounding rock support operation of dismounting anchor cable anchors, so that workers do not need to spend too much physical strength to carry and operate the anchor release device in frequent anchor release operations, thereby improving the work efficiency and reducing the labor intensity.

[0013] 2. The tool anchor of the anchor release device is more convenient to replace. The anchor release ring can push the tool anchor to move backward to increase the middle diameter of the tool anchor. When the middle cylinder drives the anchor release body to move, the tool anchor moves forward under the action of the reset spring, and the inner hole of the tool anchor shrinks to tightly hold the steel strand. When replacing the tool anchor, only the anchor release ring needs to be operated to change the interaction between the anchor release ring and the tool anchor, so that the tool anchor can be taken out and replaced without complex dismounting and pressure boosting operations, which greatly improves the replacement efficiency of the tool anchor, reduces the construction difficulty, and ensures the smooth operation of the anchor release operation. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 is an internal schematic view of the application embodiment;

[0015] Fig. 2 is a partial structure sectional view of the application embodiment;

[0016] Fig. 3 is a partial sectional view of the application embodiment.

[0017] BRIEF DESCRIPTION OF DRAWINGS 1. anchor release body; 2. anchor release ring; 3. inner cylinder; 4. tool anchor; 5. reset spring seat; 6. reset spring; 7. tool anchor screw plug; 8. sealing cover; 9. rear cover; 10. middle cylinder; 11. outer cylinder. DETAILED DESCRIPTION

[0018] The following will be described in detail with reference to the accompanying drawings. Figs. 1-3 The application will be further described in detail.

[0019] The application embodiment discloses a tool anchor replacement type anchor release device. Referring to Figs. 1-3 A tool anchor replacement type anchor release device, comprising an anchor release body 1, a middle cylinder 10, an anchor release ring 2, an inner cylinder 3, a tool anchor 4, a reset spring seat 5, a reset spring 6, and a tool anchor screw plug 7.

[0020] The anchor pulling body 1 is the basic support structure of the entire anchor pulling device, providing installation and fixing positions for other components, and can be made of high-strength alloy steel to ensure that it can withstand large pressure and tension without deformation or damage during the anchor pulling operation.

[0021] The middle cylinder 10 is fixedly connected to the outer wall of the anchor pulling body 1 by welding or bolt connection, etc. The middle cylinder 10 is usually made of metal material with good strength and toughness, and has a hydraulic oil passage and action space inside for pushing other components to move. The middle cylinder 10 is connected to the hydraulic system, and the in and out of hydraulic oil can drive the middle cylinder 10 to make linear reciprocating motion, thereby driving the anchor pulling body 1 and related components to work cooperatively.

[0022] The anchor pulling ring 2 is connected to the inner wall of the anchor pulling body 1 by thread connection. This thread connection allows the anchor pulling ring 2 to be screwed in and out of the anchor pulling body 1, and can achieve a pushing action on the tool anchor 4 during screwing in. The outer thread of the anchor pulling ring 2 and the inner thread of the anchor pulling body 1 should have good matching precision to ensure smoothness and stability of movement.

[0023] The inner cylinder 3 is sleeved on the outer wall of the anchor pulling ring 2, and a gap fit can be adopted between the inner cylinder 3 and the anchor pulling ring 2 to ensure that the inner cylinder 3 can move flexibly relative to the anchor pulling ring 2, and to prevent hydraulic oil leakage. The inner cylinder 3 is also an important moving component in the anchor pulling device, which cooperates with the tool anchor 4 and other components to achieve the operation of pulling the steel strand.

[0024] The tool anchor 4 is installed inside the inner cylinder 3 and consists of three pieces. The design of the three-piece structure allows the tool anchor 4 to change in diameter in different working states, thereby achieving the operation of tightening and loosening the steel strand. The material of the tool anchor 4 should have high hardness and wear resistance to ensure that it will not be severely worn during multiple tightening and loosening operations of the steel strand, affecting the anchor pulling effect.

[0025] The reset spring seat 5 is arranged at the end of the plurality of tool anchors 4 away from the anchor pulling ring 2, and serves to fix and support the reset spring 6. The shape and size of the reset spring seat 5 should be adapted to the reset spring 6 to ensure that the reset spring 6 can work stably.

[0026] The reset spring 6 is sleeved on the outer wall of the reset spring seat 5. The reset spring 6 has a certain elastic coefficient and can provide elastic force to restore to the initial state after the tool anchor 4 is subjected to external force. The material of the reset spring 6 is usually high-quality spring steel to ensure its elastic properties and service life.

[0027] The tool anchor plug 7 is movably connected with the outer wall of the reset spring seat 5 and is threadedly connected with the inner wall of the inner cylinder 3. The reset spring 6 is located between the reset spring seat 5 and the tool anchor plug 7. The tool anchor plug 7 is threadedly connected with the inner wall of the inner cylinder 3. On the one hand, the tool anchor plug 7 can limit the reset spring 6 and the reset spring seat 5. On the other hand, the pre-tightening force of the reset spring 6 can be adjusted by adjusting the screwing depth of the tool anchor plug 7, so as to affect the gripping and loosening performance of the tool anchor 4.

[0028] The sealing cover 8 is sleeved on the outer wall of the inner cylinder 3. The sealing cover 8 is usually made of rubber or other materials with good sealing performance. The shape and size of the sealing cover 8 should be adapted to the matching parts of the inner cylinder 3 and the outer cylinder 11, so as to effectively prevent hydraulic oil leakage. The outer surface of the sealing cover 8 can be designed with a sealing groove for installing a sealing cover rubber ring, so as to further improve the sealing effect.

[0029] The outer cylinder 11 is installed on the outer wall of the middle cylinder 10. The outer cylinder 11 plays a role in protecting and supporting the internal components. The material of the outer cylinder 11 can be selected from the same or similar high-strength alloy steel as the anchor extractor body 1. The outer cylinder 11 and the middle cylinder 10 can be connected by bolts or other reliable connection methods to ensure the firmness of the connection.

[0030] The sealing cover 8 is located between the outer cylinder 11 and the inner cylinder 3 and abuts against the end of the middle cylinder 10 away from the anchor extractor body 1, for sealing the outer cylinder 11 and the inner cylinder 3. During installation, it is necessary to ensure that the sealing cover 8 is in close contact with the outer cylinder 11, the inner cylinder 3 and the middle cylinder 10 to avoid gaps that may cause hydraulic oil leakage and affect the normal operation of the anchor extractor.

[0031] The rear cover 9 is threadedly connected with the inner wall of the outer cylinder 11 and abuts against the outer wall of the end of the sealing cover 8 away from the middle cylinder 10. The rear cover 9 serves to further fix the sealing cover 8 and prevent the sealing cover 8 from moving or coming off during the operation of the anchor extractor. The rear cover 9 also plays a protective role for the internal structure of the anchor extractor. The thread connection between the rear cover 9 and the outer cylinder 11 should have sufficient tightening torque to ensure the reliability of the connection.

[0032] When the anchor extractor ring 2 is screwed to a specific position, the tool anchor 4 is pushed to move backward, so that the middle diameter of the tool anchor 4 increases. The anchor extractor ring 2 is screwed into the anchor extractor body 1 through the thread. When it is screwed to a specific position, the end part thereof will contact the tool anchor 4 and apply a pushing force. Since the tool anchor 4 is composed of three pieces, the three-piece structure will expand outward under the action of the backward pushing force, so that the middle diameter of the tool anchor 4 increases. This change in diameter makes it easier for the steel strand to pass into the tool anchor 4, thereby preparing for the subsequent anchor extraction operation.

[0033] When the middle cylinder 10 drives the anchor extractor body 1 to move, the tool anchor 4 moves forward under the action of the reset spring 6, and the inner hole of the tool anchor 4 is reduced; when the middle cylinder 10 moves forward under the action of the hydraulic oil, the anchor extractor body 1 fixedly connected with the middle cylinder 10 moves together; at this time, the anchor extractor ring 2 is away from the tool anchor 4 due to the threaded connection relationship between the anchor extractor ring 2 and the anchor extractor body 1, and the tool anchor 4 loses the backward thrust of the anchor extractor ring 2; the reset spring 6 releases the elastic force and pushes the reset spring seat 5 and the tool anchor 4 to move forward, because the reset spring 6 is compressed before; in the process of moving forward, the three-piece structure is inwardly retracted, so that the inner hole of the tool anchor 4 is reduced, and the steel strand is tightly gripped to facilitate subsequent pulling and anchor extraction operations.

[0034] The implementation principle of the anchor extractor in the embodiment of the application is as follows: the hydraulic oil enters the hydraulic cavity in the middle cylinder 10 through the oil inlet, and drives the middle cylinder 10 to move forward under the action of the hydraulic oil pressure; since the middle cylinder 10 is fixedly connected with the anchor extractor body 1, the anchor extractor body 1 also moves forward; with the movement of the anchor extractor body 1, the anchor extractor ring 2 threaded with the inner wall of the anchor extractor body 1 gradually moves away from the tool anchor 4; at this time, the reset spring 6 compressed by the anchor extractor ring 2 begins to release the elastic potential energy and push the reset spring seat 5 and the tool anchor 4 to move forward; since the tool anchor 4 is composed of three pieces, the three-piece structure is inwardly retracted in the process of moving forward, so that the inner hole of the tool anchor 4 is reduced, and the steel strand is tightly gripped;

[0035] With the continuous entry of the hydraulic oil into the middle cylinder 10, the middle cylinder 10 continuously moves forward and drives the anchor extractor body 1 and the inner cylinder 3 connected therewith to move forward; when the front end of the anchor extractor body 1 abuts against the anchor ring of the anchor device, the inner cylinder 3 drives the tool anchor 4 to move forward, so that the steel strand is pulled out of the rock stratum; after the steel strand is pulled out for a certain distance, the anchor pieces in the anchor cable anchor device are also brought out and enter the groove at the head of the anchor extractor; at this time, the oil supply to the oil inlet is stopped, the current pulling force is kept unchanged, and the operator removes all the anchor pieces; since there is no anchoring effect of the anchor pieces, the anchoring relationship between the anchor cable anchor device and the steel strand is released.

[0036] The operator controls the oil pump operation valve to gradually reduce the pressure in the hydraulic system and stop the hydraulic pushing action on the middle cylinder 10, so that damage to the anchor extractor and related components caused by excessively high hydraulic pressure in the subsequent operation process can be avoided.

[0037] The hydraulic oil enters the other side hydraulic cavity of the middle cylinder 10 through the oil return port, and pushes the middle cylinder 10 to move backward under the action of the hydraulic oil pressure. Since the middle cylinder 10 is fixedly connected with the anchor pulling device body 1, the anchor pulling device body 1 also moves backward with the middle cylinder 10. With the movement of the anchor pulling device body 1, the anchor pulling ring 2 which is threadedly connected with the inner wall of the anchor pulling device body 1 gradually approaches and abuts against the tool anchor 4. Under the action of the thrust force of the anchor pulling ring 2, the tool anchor 4 moves backward, and the three-piece structure of the tool anchor 4 expands outward, so that the middle diameter of the tool anchor 4 increases, thereby gradually loosening the steel strand which is tightly gripped. When the anchor pulling device is returned to the bottom of the cylinder, the maximum steel strand loosening space is realized, and thus the automatic anchor pulling function of the tool anchor 4 is completed. The operator can take down the anchor pulling device from the steel strand, and ends the anchor pulling operation.

[0038] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A de-anchoring device for post-exchange tool anchoring, characterized in that: The utility model provides an anchor releasing device, which comprises a body (1), a middle cylinder (10), an anchor releasing ring (2), an inner cylinder (3), a tool anchor (4), a reset spring seat (5), a reset spring (6) and a tool anchor gland (7), the middle cylinder (10) is fixedly connected to the outer wall of the body (1), the anchor releasing ring (2) is threadedly connected to the inner wall of the body (1), the inner cylinder (3) is sleeved on the outer wall of the anchor releasing ring (2), the tool anchor (4) is installed inside the inner cylinder (3) and is composed of three pieces, the reset spring seat (5) is arranged at one end of the tool anchor (4) away from the anchor releasing ring (2), the reset spring (6) is sleeved on the outer wall of the reset spring seat (5), the tool anchor gland (7) is movably connected to the outer wall of the reset spring seat (5) and is threadedly connected to the inner wall of the inner cylinder (3), and the reset spring (6) is located between the reset spring seat (5) and the tool anchor gland (7).

2. A de-anchoring device for a post-tensioning tool anchor type according to claim 1, characterized in that: The utility model also comprises a sealing cover (8) and an outer cylinder (11), the sealing cover (8) is sleeved on the outer wall of the inner cylinder (3), the outer cylinder (11) is installed on the outer wall of the middle cylinder (10), the sealing cover (8) is located between the outer cylinder (11) and the inner cylinder (3) and abuts against one end of the middle cylinder (10) away from the body (1) for sealing the outer cylinder (11) and the inner cylinder (3).

3. A de-anchoring tool for a post-tensioned tool anchor of the type defined in claim 1, characterized in that: The utility model also comprises a rear cover (9), the rear cover (9) is threadedly connected to the inner wall of the outer cylinder (11) and abuts against the outer wall of one end of the sealing cover (8) away from the middle cylinder (10).

4. A de-anchoring tool for a tool anchor of the type described in claim 1, characterized in that: When the anchor releasing ring (2) is screwed to a specific position, the tool anchor (4) is pushed to move backward, so that the middle diameter of the tool anchor (4) is increased.

5. A de-anchoring tool for a tool anchor of the type described in claim 1, characterized in that: When the middle cylinder (10) drives the body (1) to move, the tool anchor (4) moves forward under the action of the reset spring (6), so that the inner hole of the tool anchor (4) is reduced.

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