Anchor cable returnable system

Abstract

The utility model is suitable for the technical field of coal mine tunnel support, and provides an anchor cable anchor-retreating system, which comprises a plunger, a base, a lengthened spring bolt, a lockset, a protective shell and a tray, the plunger is installed on surrounding rock, an anchor cable is installed in an anchor cable hole formed in the surrounding rock, and the anchor cable penetrates through the plunger; an oil cavity is formed between the base and the plunger; the tray is mounted on the base, and the lock is mounted on the tray; the end, away from the anchor cable hole, of the anchor cable is installed in the lengthened spring bolt, the lengthened spring bolt is connected with the drawing bolt, a backing ring is arranged between the lengthened spring bolt and the lock, and the circular-truncated-cone-shaped end of the lengthened spring bolt is inserted into the lock. The device does not need to additionally use anchor pulling equipment, effectively reduces the labor intensity of coal miners, and is high in applicability, high in working efficiency, high in controllability and good in safety.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine roadway support technology, and in particular relates to a retractable anchor cable system. Background Technology

[0002] In coal mine roadway support, especially in deep mines and roadways with complex geological conditions, anchor bolts alone cannot provide effective support. In these cases, anchor cables become an important support device besides anchor bolts. Anchor cables are mainly made of high-strength, low-relaxation steel strands, providing strong prestress and anchoring force, thus effectively controlling the deformation of the surrounding rock. In the support of longwall mining roadways, after the working face has passed, to prevent the triangular area behind the working face from hanging for an extended period and forming a large area suspended without collapsing, it is necessary to promptly unanchor the anchor cables in the longwall mining roadways to ensure timely roof collapse.

[0003] Existing anchor removal methods mostly involve hydraulic pulling or direct cutting of the anchor cable. These methods often involve heavy equipment that needs frequent relocation, which is inconvenient in the confined spaces of mining roadways. Furthermore, the lack of safety measures increases the risk of the anchor cable or locking tongue popping out and injuring people, posing a significant safety hazard. In some roadways, the exposed steel strands of the anchor cable are often bent or forked due to mining activities or transportation damage, making it difficult to secure using traditional pulling methods and resulting in poor applicability. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide an anchor cable retraction system, which aims to solve the problems mentioned in the background art.

[0005] This utility model is implemented as follows: a retractable anchor cable system includes a plunger, a base, an extended locking tongue, a lock, a protective shell, and a tray, wherein:

[0006] The protective housing is installed on the surrounding rock, and the plunger, base, extended locking tongue, lock and tray are all installed in the protective housing. A pull-out bolt is also provided on the side of the protective housing away from the surrounding rock, and the pull-out bolt is installed in the bolt hole on the protective housing. A fixing nut for fixing the pull-out bolt is also provided on the protective housing.

[0007] The plunger is installed on the surrounding rock, and an anchor cable is installed in the anchor cable hole opened on the surrounding rock, and the anchor cable passes through the plunger;

[0008] The plunger is slidably mounted on the base on the side away from the surrounding rock, and the base can slide along the anchor cable axis. An oil cavity is provided between the base and the plunger, and a first control component for controlling the amount of oil in the oil cavity is also provided on the base. An inner rising limiting ring for limiting the plunger is provided inside the base, and an outer rising limiting ring for limiting the plunger is provided outside the base. The inner rising limiting ring limits the stroke of the plunger by cooperating with the outer rising limiting ring.

[0009] The tray is mounted on the side of the base away from the plunger, and the lock is mounted on the tray;

[0010] The extended latch is located on the side of the lock away from the tray. The end of the anchor cable away from the anchor cable hole is installed in the extended latch. The end face of the extended latch away from the lock is provided with a connecting hole for installing a pull-out bolt. A washer is provided between the extended latch and the lock. An oil channel is provided on the side wall of the washer. A second control component for controlling the amount of oil in the washer is provided in the oil channel. The end of the extended latch near the lock is frustum-shaped, and the frustum-shaped end of the extended latch is inserted into the lock.

[0011] In a further technical solution, the oil cavity is an annular cavity, and the inner and outer sides of the oil cavity are sealed with sealing gaskets to ensure the airtightness of the oil cavity and prevent oil leakage during the movement of the base.

[0012] In a further technical solution, the first control component includes an oil inlet on the base, in which a first top ball rod and a first sealing ball are installed. The first sealing ball is connected to the inside of the oil inlet by a first limiting spring. The oil inlet is also provided with a locking platform for limiting the first sealing ball. The oil inlet is also provided with a first oil pipe, and the first top ball rod is connected to one end of the first oil pipe located inside the oil inlet.

[0013] In a further technical solution, the second control component includes a second top ball rod and a second sealing ball in the oil delivery channel. The second sealing ball is connected to the inside of the oil delivery channel through a second limiting spring. The oil delivery channel is also provided with a locking platform for limiting the second sealing ball. The oil delivery channel is also equipped with a second oil delivery pipe, and a second top ball rod is provided on one end of the second oil delivery pipe located in the oil delivery channel.

[0014] The utility model provides a retractable anchor cable system, which has the following advantages:

[0015] (1) When using the system to remove anchors, there is no need to use additional anchoring equipment, which effectively reduces the labor intensity of coal miners;

[0016] (2) This system is not a traditional pull-out anchoring system. It can remove anchors regardless of the bending or bifurcation of the exposed steel strands, which greatly improves its applicability.

[0017] (3) The system is a non-destructive anchoring system, which causes little disturbance to the roadway and surrounding rock;

[0018] (4) The system is recyclable and reusable, effectively reducing support costs;

[0019] (5) The system is a non-cutting anchor removal system, which has a fast anchor removal speed, short time, and does not affect the normal production of the working face;

[0020] (6) The system can be used in confined spaces and is not limited by spatial conditions;

[0021] (7) When using this system to remove the anchor, the exposed parts of the lock and anchor cable are inside the protective shell during the removal process, which can effectively prevent the extended lock tongue or the anchor cable from popping out and injuring people, greatly protecting the safety of coal miners and contributing to safe coal mine production.

[0022] (8) The system is designed in two stages when depressurizing. After tightening the oil pipe, continue to tighten it to open the sealing ball for depressurization. It has high controllability and is safer. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of an anchor cable retractable anchoring system provided in an embodiment of the present utility model.

[0024] Figure 2 This is a structural diagram of an anchor cable retractable anchoring system provided for an embodiment of the present utility model during installation.

[0025] Figure 3 This is a schematic diagram of the structure of a retractable anchor cable system after installation, as provided in an embodiment of this utility model.

[0026] Figure 4 This is a schematic diagram of the structure of an anchor cable retractable anchoring system during anchor retraction, provided as an embodiment of the present utility model.

[0027] Figure 5 This is a schematic diagram of the structure of an anchor cable retractable anchoring system after retraction, provided as an embodiment of the present utility model.

[0028] Figure 6 This is a three-dimensional structural diagram of the plunger and base in a retractable anchoring system provided for an embodiment of the present invention.

[0029] Figure 7 A side view of the plunger and base in a retractable anchor system provided in this embodiment of the present utility model.

[0030] Figure 8This is a top view of the piston and base mating in an anchor cable retractable anchoring system provided in this embodiment of the utility model.

[0031] Figure 9 This is an exploded perspective view of the piston and base in a retractable anchor system provided in this embodiment of the utility model.

[0032] Figure 10 This is an exploded side view of the plunger and base in a retractable anchor system provided in this embodiment of the present invention.

[0033] Figure 11 This is a three-dimensional structural diagram of the extended locking tongue, washer ring, and lock in an anchor cable retractable anchoring system provided for an embodiment of the present invention.

[0034] Figure 12 This is a three-dimensional structural diagram of an extended locking tongue in an anchor cable retractable anchoring system provided in an embodiment of the present invention.

[0035] Figure 13 This is a three-dimensional structural diagram of a protective shell in an anchor cable retractable anchoring system provided for an embodiment of the present utility model.

[0036] In the attached diagram: 1. Plunger; 2. Base; 3. Oil chamber; 4. Inner rising limiting ring; 5. Outer rising limiting ring; 6. Sealing gasket; 7. Oil inlet; 7a. First oil inlet pipe; 7b. First ball rod; 7c. First sealing ball; 7d. First limiting spring; 8. Extended locking tongue; 9. Washer ring; 9a. Second oil inlet pipe; 9b. Second ball rod; 9c. Second sealing ball; 9d. Second limiting spring; 10. Lock; 11. Connecting hole; 12. Protective shell; 12a. Pull-out bolt; 12b. Fixing nut; 12c. Bolt hole; 12d. Oil inlet pipe hole; 13. Surrounding rock; 13a. Anchor cable hole; 13b. Anchor cable; 14. Tray. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0038] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0039] like Figure 1-13 As shown, an embodiment of the present invention provides a retractable anchoring system, comprising a plunger 1, a base 2, an extended locking tongue 8, a locking device 10, a protective shell 12, and a tray 14, wherein:

[0040] The protective housing 12 is installed on the surrounding rock 13, and the plunger 1, base 2, extended locking tongue 8, lock 10 and tray 14 are all installed in the protective housing 12. A pull-out bolt 12a is also provided on the side of the protective housing 12 away from the surrounding rock 13, and the pull-out bolt 12a is installed in the bolt hole 12c on the protective housing 12. A fixing nut 12b for fixing the pull-out bolt 12a is also provided on the protective housing 12.

[0041] The plunger 1 is installed on the surrounding rock 13, and an anchor cable 13b is installed in the anchor cable hole 13a opened on the surrounding rock 13, and the anchor cable 13b passes through the plunger 1.

[0042] The plunger 1 is slidably mounted on the base 2 on the side away from the surrounding rock 13, and the base 2 can slide along the axial direction of the anchor cable 13b. An oil cavity 3 is provided between the base 2 and the plunger 1, and a first control component for controlling the amount of oil in the oil cavity 3 is also provided on the base 2. An inner rising limiting ring 4 for limiting the plunger 1 is provided inside the base 2, and an outer rising limiting ring 5 for limiting the plunger 1 is provided outside the base 2. The inner rising limiting ring 4 limits the stroke of the plunger 1 by cooperating with the outer rising limiting ring 5.

[0043] The tray 14 is mounted on the side of the base 2 away from the plunger 1, and the lock 10 is mounted on the tray 14;

[0044] The extended locking tongue 8 is located on the side of the lock 10 away from the tray 14. The end of the anchor cable 13b away from the anchor cable hole 13a is installed in the extended locking tongue 8. The end face of the extended locking tongue 8 away from the lock 10 is provided with a connecting hole 11 for installing the pull bolt 12a. A washer 9 is provided between the extended locking tongue 8 and the lock 10. An oil channel is provided on the side wall of the washer 9. A second control component for controlling the amount of oil in the washer 9 is provided in the oil channel. The end of the extended locking tongue 8 near the lock 10 is frustoconical, and the frustoconical end of the extended locking tongue 8 is inserted into the lock 10.

[0045] In this embodiment of the invention, the washer 9 is a retractable annular component. When prestress is applied, hydraulic oil is injected into the washer 9 through the oil channel, causing the washer 9 to elongate. At this time, the force applied by pulling the anchor cable when applying pre-tightening force is transmitted through the extended locking tongue 8-waist 9-locking device 10. The function of the washer 9 is to prevent the extended locking tongue 8 from deforming due to excessive force. After installation, the hydraulic oil inside the washer 9 is released using the second control component, and the washer 9 shortens, reserving space for the extended locking tongue 8 to continue to shrink inward under force later. During installation, the locking device 10 abuts against the base 2 through the tray 14, and the plunger 1 abuts against the surrounding rock 13. When pre-tightening force is applied, the extended locking tongue 8 is protected by the washer 9. After the pre-tightening force is applied, the washer 9 shortens, locking the extended locking tongue 8, the anchor cable 13b, and the locking device 10 together. At this time, the force on the anchor cable 13b is transmitted to the surface of the surrounding rock through the tray 14-base 2-hydraulic oil-plunger 1. When the anchor is released, hydraulic oil is discharged through the oil inlet 7, the plunger 1 contracts, and the locking device 10 moves with the anchor cable 13b toward the surrounding rock 13. At this time, the extended locking tongue 8 is connected to the pull bolt 12a on the protective shell 12 through the connecting hole 11 on the extended locking tongue 8, which restricts the movement of the extended locking tongue 8, thereby disengaging the extended locking tongue 8 from the locking device 10 and realizing automatic anchor release without external force.

[0046] like Figure 1-5 As shown in the preferred embodiment of this utility model, the oil cavity 3 is an annular cavity, and the inner and outer sides of the oil cavity 3 are sealed with sealing gaskets 6 to ensure the sealing performance of the oil cavity 3 and prevent oil leakage from the oil cavity 3 during the movement of the base 2.

[0047] like Figure 1 As shown, in a preferred embodiment of the present invention, the first control component includes an oil inlet 7 opened on the base 2. A first top ball rod 7b and a first sealing ball 7c are installed in the oil inlet 7. The first sealing ball 7c is connected to the inside of the oil inlet 7 through a first limiting spring 7d. The oil inlet 7 is also provided with a locking platform for limiting the first sealing ball 7c. A first oil pipe 7a is also installed in the oil inlet 7, and the first top ball rod 7b is connected to one end of the first oil pipe 7a located inside the oil inlet 7.

[0048] In this embodiment of the invention, in its free state, the first sealing ball 7c rests against the mounting plate, which can isolate the oil inlet 7 and prevent the oil in the oil chamber 3 from overflowing. When oil needs to be injected into the oil chamber 3 or oil needs to be extracted from the oil chamber 3, the first sealing ball 7c can be lifted by the first ball rod 7b at the end of the first oil pipe 7a, so that the oil can be exchanged through the oil inlet 7.

[0049] like Figure 1As shown, in a preferred embodiment of the present invention, the second control component includes a second top ball rod 9b and a second sealing ball 9c in the oil delivery channel. The second sealing ball 9c is connected to the inside of the oil delivery channel through a second limiting spring 9d. The oil delivery channel is also provided with a locking platform for limiting the second sealing ball 9c. The oil delivery channel is also equipped with a second oil delivery pipe 9a, and the second top ball rod 9b is provided on one end of the second oil delivery pipe 9a located in the oil delivery channel.

[0050] In this embodiment of the invention, the protective housing 12 is further provided with an oil delivery pipe hole 12d that matches the first oil delivery pipe 7a. In the free state, the second sealing ball 9c rests against the locking plate, which can isolate the oil delivery channel and prevent the oil in the gasket 9 from overflowing. When oil needs to be injected into the gasket 9 or oil needs to be extracted from the gasket 9, the second sealing ball 9c can be lifted by the second ball rod 9b at the end of the second oil delivery pipe 9a, thereby allowing the oil to be exchanged through the oil delivery channel.

[0051] The specific use of the above-mentioned retractable anchor system includes the following steps:

[0052] Step 1, Installation:

[0053] Step 1.1 Before support, prepare anchor cable 13b, all components of the retractable anchor system, and related accessories or equipment;

[0054] Step 1.2: According to the support design requirements, drill anchor cable holes 13a at the support location and install anchor cables 13b to the designated positions;

[0055] Step 1.3: Install the plunger 1, base 2, tray 14, lock 10 and extended lock tongue 8 onto the anchor cable in sequence;

[0056] Step 1.4: Tension anchor cable 13b and apply initial preload;

[0057] Step 1.5: Release the hydraulic oil in the washer ring 9 to shorten the washer ring 9 and complete the installation;

[0058] Step 2, Anchor Removal:

[0059] Step 2.1: Install the protective casing 12 and hang it on the metal mesh using hooks to prevent it from falling.

[0060] Step 2.2: Use pull bolt 12a to connect the connecting hole 11 on the extended locking tongue 8, so that the extended locking tongue 8 is connected to the protective shell 12;

[0061] Step 2.3: Discharge the hydraulic oil inside the oil chamber 3 through the oil inlet 7 to cause the base 2 to retract;

[0062] Step 2.4: The extended bolt 8 automatically separates from the lock 10;

[0063] Step 2.5: Remove the protective shell 12, extended locking tongue 8, tray 12, base 2 and plunger 1 to complete the anchor removal.

[0064] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An anchor line retractable anchor system, characterized by, Includes plunger, base, extended latch, lock, protective housing, and tray, wherein: The protective housing is installed on the surrounding rock, and the plunger, base, extended locking tongue, lock and tray are all installed in the protective housing. A pull-out bolt is also provided on the side of the protective housing away from the surrounding rock, and the pull-out bolt is installed in the bolt hole on the protective housing. A fixing nut for fixing the pull-out bolt is also provided on the protective housing. The plunger is installed on the surrounding rock, and an anchor cable is installed in the anchor cable hole opened on the surrounding rock, and the anchor cable passes through the plunger; The plunger is mounted on the base on the side away from the surrounding rock, and the base can slide along the anchor cable axis. An oil cavity is provided between the base and the plunger, and a first control component for controlling the amount of oil in the oil cavity is also provided on the base. An inner rising limiting ring for limiting the plunger is provided inside the base, and an outer rising limiting ring for limiting the plunger is provided outside the base. The inner rising limiting ring limits the stroke of the plunger by cooperating with the outer rising limiting ring. The tray is mounted on the side of the base away from the plunger, and the lock is mounted on the tray; The extended latch is located on the side of the lock away from the tray. The end of the anchor cable away from the anchor cable hole is installed in the extended latch. The end face of the extended latch away from the lock is provided with a connecting hole for installing a pull-out bolt. A washer is provided between the extended latch and the lock. An oil channel is provided on the side wall of the washer. A second control component for controlling the amount of oil in the washer is provided in the oil channel. The end of the extended latch near the lock is frustum-shaped, and the frustum-shaped end of the extended latch is inserted into the lock.

2. An anchor line retractable anchor system according to claim 1, wherein, The oil chamber is an annular cavity, and the inner and outer sides of the oil chamber are sealed with sealing gaskets to ensure the airtightness of the oil chamber and prevent oil leakage during the movement of the base.

3. The line retracting anchor system of claim 1, wherein, The first control component includes an oil inlet on the base, in which a first top ball rod and a first sealing ball are installed. The first sealing ball is connected to the inside of the oil inlet by a first limiting spring. The oil inlet is also provided with a locking platform for limiting the first sealing ball. The oil inlet is also provided with a first oil pipe, and the first top ball rod is connected to one end of the first oil pipe located inside the oil inlet.

4. The line retracting anchor system of claim 3, wherein, The second control component includes a second top ball rod and a second sealing ball in the oil delivery channel. The second sealing ball is connected to the inside of the oil delivery channel through a second limiting spring. The oil delivery channel is also provided with a locking platform for limiting the second sealing ball. The oil delivery channel is also equipped with a second oil delivery pipe, and a second top ball rod is provided on one end of the second oil delivery pipe located in the oil delivery channel.

5. The line retracting anchor system of claim 4, wherein, The protective shell also has a pre-drilled oil pipe hole that matches the first oil pipe.

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