Hydraulic drawing device for recovering anchor rod

Abstract

The utility model discloses a hydraulic drawing device for anchor rod recovery, which belongs to the technical field of anchor rod recovery and comprises an outer cylinder, a rear cover is in threaded connection with the inside of the outer cylinder, a locking nut is in threaded connection with the inside of the rear cover, the locking nut is in threaded connection with the outside of an inner cylinder, and one side of the rear cover and one side of the locking nut are overlapped with the same sealing cover; by arranging the anchor cup, the tool anchor, the anchor jacking spring, the jacking device, the middle cylinder, the supporting barrel and the reversing valve operation table, the device can carry out automatic anchor withdrawing operation of the tool anchor, and the tool anchor, the anchor cup and the anchor jacking spring are matched with one another to adjust the size of the tool anchor, so that the tool anchor can grab anchor rods of phi 20mm and phi 22mm, and can provide drawing force below 250kN; the applicability of the device is improved, the device is small in size, due to the fact that the outer cylinder and the middle cylinder are made of aluminum alloy, the device is light in weight and convenient to operate and maintain, the length of the tensioning stroke is increased, the number of tensioning times is reduced, and the working efficiency is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of anchor rod recovery, and in particular relates to an anchor rod recovery hydraulic pulling device. Background Art

[0002] With the vigorous development of anchor support technology at home and abroad, the utilization rate of anchors has increased year by year. Another problem that has arisen is how to recycle the waste anchors, which has become a very necessary and urgent task. If they are recycled, the support cost can be greatly reduced. On the other hand, anchor support has greatly improved the safety of underground operations. However, as the working face advances, it gradually enters the tunnel behind the working face. The tunnel roof cannot collapse with the release of the working face due to the suspension effect of the anchors, resulting in a large range of suspended roof at the rear end of the working face, forming a ventilation dead corner, which is prone to gas accumulation and affects safety.

[0003] However, when traditional tensioning equipment is used for pulling, it is inconvenient to operate due to its heavy weight (all parts are made of steel), and its tensioning stroke is short. However, the anchor rod generally ranges from two meters to more than ten meters. The tensioning equipment with a short stroke needs to tension the anchor rod multiple times, which is cumbersome to operate. Moreover, the jack of a tensioning equipment can only pull one type of anchor rod, which reduces its applicability. Therefore, an anchor rod recovery hydraulic pulling device is needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide an anchor rod recovery hydraulic pulling device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anchor rod recovery hydraulic pulling device, comprising an outer cylinder, a rear cover is connected to the inner thread of the outer cylinder, a locking nut is connected to the inner thread of the rear cover, the locking nut is threadedly connected to the outside of the inner cylinder, one side of the rear cover and the locking nut are overlapped with the same sealing cover, the sealing cover is arranged between the outer cylinder and the inner cylinder, a middle cylinder is slidably connected between the outer cylinder and the inner cylinder, an anchor cup is connected in the middle cylinder, the inner cylinder is connected to the tool anchor through a top anchor spring, the outer surface of the tool anchor is overlapped with the inner wall of the anchor cup, one end of the middle cylinder is connected to a pusher, an anchor withdrawal ring is connected in the pusher, the inner wall of the anchor cup is set to be conical, and the outer surface of the tool anchor is set to be conical.

[0006] As a preferred solution, a locking ring is overlapped between the rear cover and the locking nut.

[0007] As a preferred solution, an oil inlet and an oil outlet are connected inside the outer cylinder, and the oil outlet and the oil inlet are connected to the reversing valve operating table through a first high-pressure rubber hose and a second high-pressure rubber hose respectively.

[0008] As a preferred solution, a connecting rod is overlapped inside the tool anchor, the connecting rod is externally threadedly connected to a connecting screw sleeve, and the connecting screw sleeve is internally threadedly connected to the anchor rod.

[0009] As a preferred solution, a tray is connected to the anchor rod outer shell, one side of the tray is overlapped with the support tube, and the support tube is overlapped with the top press.

[0010] As a preferred solution, the anchor withdrawal ring is arranged on one side of the tool anchor, and the position of the anchor withdrawal ring corresponds to the position of the tool anchor.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model is provided with an anchor cup, a tool anchor, a top anchor spring, a top pressure device, a middle cylinder, a support cylinder and a reversing valve operating table. When the middle cylinder is extended, the tool anchor moves along the inner wall of the anchor cup under the action of the elastic force of the contraction top anchor spring and is squeezed outside the connecting rod. The device can realize automatic anchoring operation, continue to control the extension of the middle cylinder, and then the device can slowly move the anchor rod out of the fixed object. The hydraulic oil is passed through the first high-pressure rubber hose and the oil outlet through the reversing valve operating table to enter between the outer cylinder and the inner cylinder. The retracted anchor withdrawal ring pushes the tool anchor to be retracted along the inner wall of the anchor cup. By detaching from the connecting rod, the device can automatically withdraw the tool anchor, making the device easy to use, and the tool anchor, anchor cup and top anchor spring cooperate with each other to adjust the size of the tool anchor, so that the tool anchor can grab φ20mm and φ22mm anchor rods, and can provide a pulling force of less than 250kN, which improves the applicability of the device. The device is small in size, and because the material of the outer cylinder and the middle cylinder are both set to aluminum alloy, the device is light in weight, easy to operate and maintain, and the length of the tensioning stroke is increased, the number of tensioning times is reduced, and the work efficiency is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a partial three-dimensional cross-sectional structural schematic diagram of the utility model in an extended state;

[0014] Figure 2 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0015] Figure 3 It is a schematic cross-sectional structure diagram of a part of the outer cylinder in the retracted state of the utility model;

[0016] Figure 4 This is a schematic diagram of the installation structure of the anchor rod of the utility model.

[0017] In the figure: 1. outer cylinder; 2. middle cylinder; 3. inner cylinder; 4. anchor cup; 5. top anchor spring; 6. tool anchor; 7. top pressure device; 8. anchor withdrawal ring; 9. support tube; 10. connecting rod; 11. connecting screw sleeve; 12. anchor rod; 13. tray; 14. oil inlet; 15. oil outlet; 16. first high-pressure rubber hose; 17. second high-pressure rubber hose; 18. reversing valve operating table; 19. rear cover; 20. sealing cover; 21. locking nut; 22. locking ring. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the embodiments.

[0019] The following examples are used to illustrate the present invention, but cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0020] See also Figure 1-4 The utility model provides an anchor rod recovery hydraulic pulling device, comprising an outer cylinder 1, the outer cylinder 1 is internally threadedly connected with a rear cover 19, the rear cover 19 is internally threadedly connected with a locking nut 21, the locking nut 21 is threadedly connected to the outside of the inner cylinder 3, one side of the rear cover 19 and the locking nut 21 overlaps with the same sealing cover 20, a locking ring 22 overlaps between the rear cover 19 and the locking nut 21, by setting the locking nut 21, the locking nut 21 can press the sealing cover 20 between the outer cylinder 1 and the inner cylinder 3, and the locking nut 21 can also fix the rear cover 19;

[0021] The sealing cover 20 is arranged between the outer cylinder 1 and the inner cylinder 3, the middle cylinder 2 is slidably connected between the outer cylinder 1 and the inner cylinder 3, the middle cylinder 2 is connected with the anchor cup 4, the inner cylinder 3 is connected with the tool anchor 6 through the top anchor spring 5, and by setting the top anchor spring 5, the tool anchor 6 can move under the action of the elastic force of the top anchor spring 5;

[0022] The outer surface of the tool anchor 6 overlaps the inner wall of the anchor cup 4. By setting the anchor cup 4, the movable tool anchor 6 can be adjusted to different sizes in the anchor cup 4;

[0023] One end of the middle cylinder 2 is connected to the jacking device 7, and an anchor withdrawal ring 8 is connected inside the jacking device 7. The inner wall of the anchor cup 4 is set to be conical, and the outer surface of the tool anchor 6 is set to be conical. The outer cylinder 1 is connected to an oil inlet 14 and an oil outlet 15, and the oil outlet 15 and the oil inlet 14 are respectively connected to the reversing valve operating table 18 through a first high-pressure hose 16 and a second high-pressure hose 17. A connecting rod 10 is overlapped inside the tool anchor 6, and the connecting rod 10 is externally threadedly connected to a connecting screw sleeve 11, and the connecting screw sleeve 11 is internally threadedly connected to an anchor rod 12. By providing the connecting screw sleeve 11, the connecting screw sleeve 11 can connect the connecting rod 10 and the anchor rod 12 together;

[0024] A tray 13 is connected to the outer cover of the anchor rod 12, one side of the tray 13 overlaps with the support tube 9, the support tube 9 overlaps with the top press 7, and an anchor withdrawal ring 8 is arranged on one side of the tool anchor 6. The position of the anchor withdrawal ring 8 corresponds to the position of the tool anchor 6. By setting the anchor withdrawal ring 8, the tool anchor 6 can move to the initial position under the action of retracting the anchor withdrawal ring 8.

[0025] The working principle and use process of the utility model are as follows: when the device needs to be used, the anchor rod 12 and the connecting rod 10 are connected by connecting the screw sleeve 11, the device is moved, the moving jack 7 contacts the support tube 9, and the connecting rod 10 moves into the jack 7 and the tool anchor 6, and the control valve operating table 18 passes the hydraulic oil between the outer cylinder 1 and the inner cylinder 3 through the second high-pressure hose 17 and the oil inlet 14. At this time, the middle cylinder 2 extends from between the outer cylinder 1 and the inner cylinder 3 under the action of the hydraulic oil, and the moving The middle cylinder 2 drives the anchor cup 4 to move. At this time, the tool anchor 6 moves along the inner wall of the anchor cup 4 under the action of the elastic force of the retracted top anchor spring 5, so that the tool anchor 6 moves inward and is squeezed outside the connecting rod 10. At this time, the extended middle cylinder 2 moves through the pusher 7 and the support cylinder 9 and the push tray 13. Because the tray 13 contacts the side of the fixed object of the fixed anchor rod 12, the tray 13 does not move. Under the action of the reaction force of the extended middle cylinder 2, the outer cylinder 1 and the inner cylinder 3 drive the anchor rod 12 to slowly move out of the fixed object.

[0026] When the anchor rod 12 is moved out of the fixed object, the reversing valve operating platform 18 allows the hydraulic oil to enter between the outer cylinder 1 and the inner cylinder 3 through the first high-pressure hose 16 and the oil outlet 15. At this time, the middle cylinder 2 is retracted, and the retracted middle cylinder 2 drives the anchor withdrawal ring 8 to move through the pusher 7. When the moving anchor withdrawal ring 8 contacts the tool anchor 6, the moving anchor withdrawal ring 8 pushes the tool anchor 6 to be retracted along the inner wall of the anchor cup 4, and the pusher spring 5 contracts. At this time, the tool anchor 6 is separated from the connecting rod 10, and then the outer cylinder 1 is moved to move the connecting rod 10 out of the pusher 7.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anchor rod recovery hydraulic pulling device, comprising an outer cylinder (1), characterized in that: The outer cylinder (1) is internally threadedly connected to a rear cover (19), and the rear cover (19) is internally threadedly connected to a locking nut (21). The locking nut (21) is threadedly connected to the outside of the inner cylinder (3). One side of the rear cover (19) and the locking nut (21) overlaps with the same sealing cover (20). The sealing cover (20) is arranged between the outer cylinder (1) and the inner cylinder (3). A middle cylinder (2) is slidably connected between the outer cylinder (1) and the inner cylinder (3). An anchor cup (4) is connected inside the middle cylinder (2). The inner cylinder (3) is connected to a tool anchor (6) through a top anchor spring (5). The outer surface of the tool anchor (6) overlaps with the inner wall of the anchor cup (4). One end of the middle cylinder (2) is connected to a top press (7). An anchor withdrawal ring (8) is connected inside the top press (7). The inner wall of the anchor cup (4) is set to be conical, and the outer surface of the tool anchor (6) is set to be conical.

2. The anchor rod recovery hydraulic pulling device according to claim 1, characterized in that: A locking ring (22) is overlapped between the rear cover (19) and the locking nut (21).

3. The anchor rod recovery hydraulic pulling device according to claim 1, characterized in that: The outer cylinder (1) is connected with an oil inlet (14) and an oil outlet (15), and the oil outlet (15) and the oil inlet (14) are respectively connected to a reversing valve operating platform (18) via a first high-pressure rubber hose (16) and a second high-pressure rubber hose (17).

4. The anchor rod recovery hydraulic pulling device according to claim 1, characterized in that: A connecting rod (10) is overlapped inside the tool anchor (6), the connecting rod (10) is externally threadedly connected to a connecting screw sleeve (11), and the connecting screw sleeve (11) is internally threadedly connected to an anchor rod (12).

5. The anchor rod recovery hydraulic pulling device according to claim 4, characterized in that: A tray (13) is connected to the outer shell of the anchor rod (12), one side of the tray (13) overlaps with the support tube (9), and the support tube (9) overlaps with the top press (7).

6. The anchor rod recovery hydraulic pulling device according to claim 1, characterized in that: The anchor withdrawal ring (8) is arranged on one side of the tool anchor (6), and the position of the anchor withdrawal ring (8) corresponds to the position of the tool anchor (6).

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