A fixing device for hollow grouting anchor cable under surrounding rock condition

Abstract

The utility model relates to the technical field of coal mine support, disclose a kind of fixing device for hollow grouting anchor cable under broken surrounding rock condition, including rope, the outer wall of the rope is fixedly connected with fixed mechanism, the fixed mechanism is used to be fixed in the rope as required, the outer wall top of the fixed mechanism is fixedly connected with clamping mechanism, the clamping mechanism is used to hold the rope;The fixed mechanism includes sleeve pipe, the sleeve pipe is fixedly connected in the outer wall of the rope, the outer wall top of the sleeve pipe is installed with hinge in left and right sides, the top inside of the hinge is fixedly connected with multiple bolts.In the utility model, support claw can be clamped to hole wall, realize the quick fixing of rope in the construction of anchor-free grouting anchor cable, improve grouting effect and the support strength of rope, sleeve structure is simple, easy to install, solve the problem of unstable fixing before and after grouting of grouting anchor cable in broken rock formation.

Description

Technical Field

[0001] This utility model relates to the field of coal mine support technology, and in particular to a fixing device for hollow grouting anchor cables under fractured surrounding rock conditions. Background Technology

[0002] Anchor cable support is a support method used in coal mine roadways. Compared with anchor bolts, anchor cable support covers a larger area of ​​surrounding rock. Coal mine roadways use a combination of anchor bolts and anchor cables for support to control the deformation of the surrounding rock. Anchor cables need to be used in conjunction with anchoring agents. After the anchor cables are drilled, the anchoring agents are broken up through the anchor cables and then used to anchor the ends of the anchor cables into the hard rock strata. On the one hand, the tensile strength and deformation capacity of the anchor cables themselves are used to suspend the lower rock strata. On the other hand, different rock strata can be effectively combined to improve the bearing capacity of the rock strata themselves. The effect is more significant for composite roofs or layered roofs. In particular, the anchor cables are tensioned and pre-tightened at the tail end using a tray nut to achieve active support for the surrounding rock.

[0003] The application of anchor cable preload requires ensuring sufficient anchoring strength at the anchoring end, thus fixing the anchoring end in a hard underlying rock stratum. However, there is a type of coal-bearing stratum where the roof rock above the coal seam is fractured, with the fractured soft rock extending up to ten meters, further weakening the roof. In this case, anchoring the anchoring section using anchor cables is difficult. Existing technology uses hollow grouting anchor cables in conjunction with waterproof grouting materials for support. However, this anchoring method allows the grout to flow out from the grout outlet at the top of the anchor cable into the modified surrounding rock, without the use of anchoring agent for fixation. During anchor cable installation, due to the lack of anchoring agent fixation, coupled with the fractured borehole wall and the softening and lubricating effect of water on the rock strata, the anchor cable is prone to slipping out of the anchor cable hole before grouting. After grouting, before the grout completely solidifies, the anchor cable cannot be fixed in the anchor cable hole, which is not only detrimental to construction but also poses a risk of affecting the grouting effect and reducing the anchor cable support strength. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a fixing device for hollow grouting anchor cables under fractured surrounding rock conditions. It aims to improve the existing technology where the anchor cable easily slips out of the anchor cable hole before grouting and cannot be fixed in the anchor cable hole before the grout completely solidifies after grouting. This is not only unfavorable for construction, but also poses a risk of affecting the grouting effect and reducing the anchor cable support strength.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a fixing device for hollow grouting anchor cables under fractured surrounding rock conditions, comprising a rope, a fixing mechanism fixedly connected to the outer wall of the rope, the fixing mechanism being used to fix the rope as required, a clamping mechanism fixedly connected to the top of the outer wall of the fixing mechanism, the clamping mechanism being used to clamp the rope; the fixing mechanism comprises a sleeve, the sleeve being fixedly connected to the outer wall of the rope, hinges being installed on both the left and right sides of the top of the outer wall of the sleeve, multiple bolts being fixedly connected to the inside of the top of the hinges, the sleeve being fixedly connected to the hinges by the multiple bolts, multiple springs being fixedly connected to both the left and right sides of the upper middle part of the outer wall of the sleeve, and support components being installed on both the left and right sides of the outer wall of the sleeve.

[0006] As a further description of the above technical solution:

[0007] Each of the multiple support components includes a support claw, the top of each of the multiple support claws is fixedly connected to a hinge by multiple bolts, a first fixing groove is formed in the middle of the outer wall of each of the multiple support claws on the side away from each other, a second fixing groove is formed in the middle of the outer wall of each of the multiple support claws on the side adjacent to each other, the other end of the outer wall of each of the multiple springs is fixedly connected to the inside of the second fixing groove, and a locking component is installed on the left and right sides of the middle of the outer wall of the sleeve.

[0008] As a further description of the above technical solution:

[0009] Each of the multiple locking components includes a first locking block, the outer wall of each of the multiple first locking blocks is fixedly connected to the bottom end of the outer wall of the support claw, a second locking block is slidably connected to the other end of the outer wall of the first locking block, an adjacent side of the outer wall of each of the multiple second locking blocks is fixedly connected to the outer wall of the sleeve, and a control rope is fixedly connected to the bottom of the outer wall of the first locking block.

[0010] As a further description of the above technical solution:

[0011] A rubber sleeve is installed on the outside of the sleeve, and the interior of each of the first fixing grooves is slidably connected to the outer wall of the rubber sleeve.

[0012] As a further description of the above technical solution:

[0013] The clamping mechanism includes a fixed half-ring, which is fixedly connected to the top of the outer wall of the sleeve. A movable half-ring is installed on the right side of the outer wall of the fixed half-ring, and multiple drive components are installed in the middle of the fixed half-ring.

[0014] As a further description of the above technical solution:

[0015] Each of the drive components includes a knob, and each of the knobs is installed in the middle of the fixed half ring. A rotating shaft is fixedly connected to the outer wall of the knob, and a double gear is fixedly connected to the outer wall of the rotating shaft. Each of the double gears is installed inside the fixed half ring. A double rack is installed on the top of the outer wall of the double gear, and the top of the outer wall of the double gear meshes with the bottom of the outer wall of the double rack. The front and rear ends of the movable half ring are provided with slots, and the outer wall of the double rack is slidably connected to the inside of the slots.

[0016] As a further description of the above technical solution:

[0017] The double rack has a groove in the middle, and a support block is slidably connected to the middle of the groove. The outer walls of the multiple support blocks are fixedly connected to the interior of the fixed half ring on both the front and rear sides.

[0018] As a further description of the above technical solution:

[0019] Limiting grooves are provided at the top of the front and rear ends of the movable semi-ring. A limiting bolt is slidably connected inside the limiting groove. The bottom of the outer wall of the limiting bolt is slidably connected to the inside of the right end of the double toothed rack.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, multiple fixing mechanisms are installed on the top and middle outer sides of the rope. At this time, the spring is in a compressed state and the buckle is locked. The rubber sleeve installed in the first fixing groove in the middle of the support claw provides secondary fixing and compression of the spring. After the rope with multiple fixing mechanisms is installed into the anchor hole to the required position, the control rope is pulled to control the release of the buckle at the bottom of the spring. The support claw can clamp the hole wall, realizing the rapid fixing of the rope in the construction of grouting anchor cable without anchoring agent. This not only facilitates construction but also improves the grouting effect and the support strength of the rope. The sleeve structure is simple and easy to install, which can solve the problem of unstable fixing of grouting anchor cable before and after grouting in fractured rock strata.

[0022] 2. In this utility model, rotating the knob causes the rotating shaft on its outer wall to drive the double gear to rotate inside the fixed half ring. The double gear meshes with the double rack, causing the double rack to move. The double rack can slide in the slot. The moving half ring is placed on the right side of the fixed half ring. After rotating the knob to move the double rack to the corresponding position in the slot, the limiting bolt passes through the limiting groove and is engaged with the top of the double rack, thereby clamping the rope and improving the fixing stability of the rope by the fixing mechanism. Attached Figure Description

[0023] Figure 1 This is a front view of a fixing device for hollow grouting anchor cables under fractured surrounding rock conditions proposed in this utility model;

[0024] Figure 2This is a perspective view of a fixing device for hollow grouting anchor cables under fractured surrounding rock conditions proposed in this utility model;

[0025] Figure 3 This is a split view of the fixing mechanism of a fixing device for hollow grouting anchor cables under fractured surrounding rock conditions proposed in this utility model;

[0026] Figure 4 This is a partial structural diagram of the fixing mechanism of a fixing device for hollow grouting anchor cables under fractured surrounding rock conditions proposed in this utility model.

[0027] Figure 5 This invention presents a clamping mechanism for a fixing device of a hollow grouting anchor cable under fractured surrounding rock conditions.

[0028] Figure 6 This is a partial structural cross-sectional view of the clamping mechanism of a fixing device for hollow grouting anchor cables under fractured surrounding rock conditions proposed in this utility model.

[0029] Legend:

[0030] 1. Rope; 2. Fixing mechanism; 201. Sleeve; 202. Hinge; 203. Bolt; 204. Support assembly; 2041. Support claw; 2042. First fixing groove; 2043. Second fixing groove; 205. Spring; 206. Engaging assembly; 2061. First locking block; 2062. Second locking block; 2063. Control rope; 207. Rubber sleeve; 3. Clamping mechanism; 301. Fixed half ring; 302. Moving half ring; 303. Drive assembly; 3031. Knob; 3032. Rotating shaft; 3033. Double gear; 3034. Double rack; 3035. Slide groove; 3036. Support block; 3037. Limit groove; 3038. Limit bolt; 3039. Slot. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 2 , Figure 3 and Figure 4This utility model provides an embodiment of a fixing device for hollow grouting anchor cables under fractured surrounding rock conditions, comprising a rope 1, a fixing mechanism 2 fixedly connected to the outer wall of the rope 1, the fixing mechanism 2 being used to fix the rope 1 as needed, and a clamping mechanism 3 fixedly connected to the top of the outer wall of the fixing mechanism 2, the clamping mechanism 3 being used to clamp the rope 1; the fixing mechanism 2 includes a sleeve 201, the sleeve 201 being fixedly connected to the outer wall of the rope 1, and hinges 202 being installed on both the left and right sides of the top of the outer wall of the sleeve 201, with multiple bolts 203 fixedly connected inside the top of the hinges 202, the sleeve 201 being fixedly connected to the hinges 202 through the multiple bolts 203, multiple springs 205 being fixedly connected to both the left and right sides of the upper middle part of the outer wall of the sleeve 201, and support components 204 being installed on both the left and right sides of the outer wall of the sleeve 201, each of the multiple support components 204 including a support claw 2041, the top of each of the multiple support claws 2041 being connected to the hinges 202 through multiple bolts 203. 02 Fixed connection, a first fixing groove 2042 is opened in the middle of the outer wall of multiple support claws 2041 on the side away from each other, a second fixing groove 2043 is opened in the middle of the adjacent side of the outer wall of multiple support claws 2041, the other end of the outer wall of multiple springs 205 is fixedly connected to the inside of the second fixing groove 2043, a locking component 206 is installed on the left and right sides of the middle of the outer wall of the sleeve 201, multiple locking components 206 include a first locking block 2061, the outer wall of multiple first locking blocks 2061 is fixedly connected to the bottom end of the outer wall of the support claws 2041, a second locking block 2062 is slidably connected to the other end of the outer wall of the first locking block 2061, the adjacent side of the outer wall of multiple second locking blocks 2062 is fixedly connected to the outer wall of the sleeve 201, a control rope 2063 is fixedly connected to the bottom of the outer wall of the first locking block 2061, a rubber sleeve 207 is installed on the outside of the sleeve 201, and the inside of multiple first fixing grooves 2042 is slidably connected to the outer wall of the rubber sleeve 207;

[0033] Specifically, the inner side of the sleeve 201 is made of rubber, and its inner rubber structure has a large deformation range, ensuring a tight fit between the inside of the sleeve 201 and the outer diameter of the anchor cable. The outer side is made of steel with a smooth surface. The top and bottom cross-sections of the sleeve 201 are circular, and the middle cross-section is a rounded rectangle, which facilitates effective connection with the support claw 2041 and the spring 205. The top of its frame is connected to the support claw 2041 via a hinge 202 and multiple bolts 203. The middle part of the sleeve 201 is connected to the support claw 2041 via a spring 205. A locking assembly 206 is installed at the lower end of the support claw 2041, which can compress and fix the spring 205. The release of the elasticity of the spring 205 can be controlled by a control rope 2063. The support claw 2041 is available in five-claw and seven-claw types. Compared with the five-claw type, the seven-claw type... With more claws, the fixing effect is better and the advantage is more obvious in the case of severely fractured surrounding rock. The support claw 2041 has a second fixing groove 2043 in the middle, which can fix the spring 205 inside. The first fixing groove 2042 on the outside can install a rubber sleeve 207 to fix the spring 205 for a second time. The locking component 206 is located below the spring 205. Before installation, the spring 205 is pressed and fixed with the locking component 206 to reduce the contact between the support claw 2041 and the hole wall. When in use, by pulling the control rope 2063, the locking component 206 is opened, so that the spring 205 releases its elasticity and the support claw 2041 locks the anchor cable hole wall, thereby fixing the rope 1. This realizes the rapid fixing of the rope 1 in the construction of anchor cables without anchoring agent grouting, which not only facilitates construction, but also improves the grouting effect and the support strength of the rope 1.

[0034] Reference Figure 1 , Figure 5 and Figure 6 The clamping mechanism 3 includes a fixed half-ring 301, which is fixedly connected to the top of the outer wall of the sleeve 201. A movable half-ring 302 is installed on the right side of the outer wall of the fixed half-ring 301. Multiple drive components 303 are installed in the middle of the fixed half-ring 301. Each drive component 303 includes a knob 3031, which is installed in the middle of the fixed half-ring 301. A rotating shaft 3032 is fixedly connected to the outer wall of the knob 3031. A double gear 3033 is fixedly connected to the outer wall of the rotating shaft 3032. Multiple double gears 3033 are installed in the fixed half-ring. Inside 301, a double rack 3034 is installed on the top of the outer wall of the double gear 3033. The top of the outer wall of the double gear 3033 is meshed with the bottom of the outer wall of the double rack 3034. The front and rear ends of the movable half ring 302 are provided with slots 3039. The outer wall of the double rack 3034 is slidably connected to the inside of the slots 3039. The top of the front and rear ends of the movable half ring 302 are provided with limit grooves 3037. The inside of the limit grooves 3037 is slidably connected to the limit bolts 3038. The bottom of the outer wall of the limit bolts 3038 is slidably connected to the inside of the right end of the double rack 3034.

[0035] Specifically, rotating the knob 3031 causes the shaft 3032 on its outer wall to drive the double gear 3033 to rotate inside the fixed half ring 301. Through the meshing of the double gear 3033 and the double rack 3034, the double rack 3034 moves. Since the double rack 3034 can slide in the slot 3039, the moving half ring 302 is placed on the right side of the fixed half ring 301. After rotating the knob 3031 to move the double rack 3034 to the corresponding position in the slot 3039, the limiting bolt 3038 passes through the limiting groove 3037 and is inserted into the top of the double rack 3034, forming a double fixation, thereby clamping the rope 1 and improving the fixation stability of the rope 1 by the fixing mechanism 2.

[0036] Reference Figure 5 and Figure 6 The double rack 3034 has a groove 3035 in the middle, and a support block 3036 is slidably connected in the middle of the groove 3035. The outer walls of the multiple support blocks 3036 are fixedly connected to the interior of the fixed half ring 301 on the front and rear sides.

[0037] Specifically, the groove 3035 in the middle of the double rack 3034 allows the support block 3036 to slide. Through the connection between the front and rear sides of the support block 3036 and the inside of the fixed half ring 301, the movement of the double rack 3034 can be supported, ensuring that the movement is smooth and without shaking.

[0038] Working principle: Multiple fixing mechanisms 2 are installed on the top and middle outer sides of the rope 1. At this time, the spring 205 is in a compressed state and the buckle is locked. The rubber sleeve 207 installed in the first fixing groove 2042 set in the middle of the support claw 2041 can fix and tighten the spring 205 for a second time. After the rope 1 with multiple fixing mechanisms 2 is installed into the anchor cable hole and the rope 1 moves to the required position, the control rope 2063 is pulled to control the release of the buckle at the bottom of the spring 205. At this time, the support claw 2041 can clamp the hole wall, realizing the rapid fixing of the rope 1 in the construction of anchor cable without anchoring agent grouting. This not only facilitates construction, but also improves the grouting effect and the support strength of the rope 1.

[0039] Rotating the knob 3031 causes the shaft 3032 on its outer wall to drive the double gear 3033 to rotate inside the fixed half ring 301. Through the meshing of the double gear 3033 and the double rack 3034, the double rack 3034 moves. The sliding groove 3035 in the middle allows the support block 3036 to slide. The support block 3036 is fixed to the front and rear sides of the fixed half ring 301, which supports the movement of the double rack 3034. Since the double rack 3034 can slide in the slot 3039, the moving half ring 302 is placed on the right side of the fixed half ring 301. After rotating the knob 3031 to move the double rack 3034 to the corresponding position in the slot 3039, the limiting bolt 3038 is passed through the limiting groove 3037 and inserted into the top of the double rack 3034 to clamp the rope 1 and improve the fixing stability of the rope 1 by the fixing mechanism 2.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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. A fixing device for breaking a hollow grouting anchor cable in surrounding rock conditions, comprising a rope (1), characterized in that: The outer wall of the rope (1) is fixedly connected to a fixing mechanism (2), which is used to fix the rope (1) as needed. The top of the outer wall of the fixing mechanism (2) is fixedly connected to a clamping mechanism (3), which is used to clamp the rope (1). The fixing mechanism (2) includes a sleeve (201), which is fixedly connected to the outer wall of the rope (1). Hinges (202) are installed on the left and right sides of the top of the outer wall of the sleeve (201). Multiple bolts (203) are fixedly connected inside the top of the hinges (202). The sleeve (201) is fixedly connected to the hinges (202) by multiple bolts (203). Multiple springs (205) are fixedly connected on the left and right sides of the upper middle part of the outer wall of the sleeve (201). Support components (204) are installed on the left and right sides of the outer wall of the sleeve (201).

2. The fixing device for breaking the hollow grouting anchor cable under the surrounding rock condition according to claim 1, characterized in that: Each of the multiple support components (204) includes a support claw (2041). The top of each of the multiple support claws (2041) is fixedly connected to the hinge (202) by multiple bolts (203). A first fixing groove (2042) is provided in the middle of the outer wall of each of the multiple support claws (2041) on the side away from each other. A second fixing groove (2043) is provided in the middle of the outer wall of each of the multiple support claws (2041) on the adjacent side. The other end of the outer wall of each of the multiple springs (205) is fixedly connected to the inside of the second fixing groove (2043). A locking component (206) is installed on the left and right sides of the middle of the outer wall of the sleeve (201).

3. The fixing device for breaking the hollow grouting anchor cable under the surrounding rock condition according to claim 2, characterized in that: Each of the multiple locking components (206) includes a first locking block (2061). The outer walls of the multiple first locking blocks (2061) are fixedly connected to the bottom end of the outer wall of the support claw (2041). A second locking block (2062) is slidably connected to the other end of the outer wall of the first locking block (2061). The adjacent side of the outer wall of the multiple second locking blocks (2062) is fixedly connected to the outer wall of the sleeve (201). A control rope (2063) is fixedly connected to the bottom of the outer wall of the first locking block (2061).

4. The fixing device for breaking the hollow grouting anchor cable under the surrounding rock condition according to claim 2, characterized in that: A rubber sleeve (207) is installed on the outside of the sleeve (201), and the interior of the plurality of first fixing grooves (2042) is slidably connected to the outer wall of the rubber sleeve (207).

5. The fixing device for breaking the hollow grouting anchor cable under the surrounding rock condition according to claim 1, characterized in that: The clamping mechanism (3) includes a fixed half ring (301), which is fixedly connected to the top of the outer wall of the sleeve (201). A movable half ring (302) is installed on the right side of the outer wall of the fixed half ring (301), and a plurality of drive components (303) are installed in the middle of the fixed half ring (301).

6. The fixing device for breaking the hollow grouting anchor cable under the surrounding rock condition according to claim 5, characterized in that: Each of the multiple drive components (303) includes a knob (3031), and each of the multiple knobs (3031) is installed in the middle of the fixed half ring (301). A rotating shaft (3032) is fixedly connected to the outer wall of the knob (3031), and a double gear (3033) is fixedly connected to the outer wall of the rotating shaft (3032). Each of the multiple double gears (3033) is installed inside the fixed half ring (301). A double rack (3034) is installed on the top of the outer wall of the double gear (3033). The top of the outer wall of the double gear (3033) meshes with the bottom of the outer wall of the double rack (3034). The front and rear ends of the movable half ring (302) are provided with slots (3039). The outer wall of the double rack (3034) is slidably connected to the inside of the slots (3039).

7. The fixing device for breaking the hollow grouting anchor cable under the surrounding rock condition according to claim 6, characterized in that: The double rack (3034) has a groove (3035) in the middle, and a support block (3036) is slidably connected to the middle of the groove (3035). The outer walls of the multiple support blocks (3036) are fixedly connected to the interior of the fixed half ring (301) on the front and rear sides.

8. A fixing device for hollow grouting anchor cables under fractured surrounding rock conditions according to claim 6, characterized in that: The top of the front and rear ends of the movable semi-ring (302) are provided with limiting grooves (3037), and the limiting grooves (3037) are slidably connected to the inside of the limiting grooves (3037). The bottom of the outer wall of the limiting bolt (3038) is slidably connected to the inside of the right end of the double toothed rack (3034).

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