A telescopic anchor rod device for mine roadway support

Abstract

The utility model discloses a telescopic anchor rod device for mine roadway support belongs to mine roadway support technical field. The device includes the main rod, tray and nut, and its core technical scheme is set up telescopic mechanism and reinforcing mechanism. Telescopic mechanism includes: the extension bar of inserting in the main rod, the fixed block of being fixed in the extension bar inner end, the restriction strip of being connected in the fixed block and sliding cooperation in the recess of main rod inside and be used for locking extension bar and the fixed assembly of main rod. Reinforcing mechanism includes: the placement block of being sleeved on the main rod, and the placement block content has the resin medicine roll. The utility model discloses through telescopic mechanism has realized the flexible adjustment and reliable locking of anchor rod length, has solved the problem of length fixed, difficult to adapt to different drilling depth. Meanwhile, through the fixed needle of reinforcing mechanism and fills up the medicine roll of being pricked, cooperation fills up pad and realizes the hole mouth sealing, effectively solved the resin overflow problem, simple structure, reliable use.

Description

Technical Field

[0001] This utility model relates to the field of mine roadway support technology, and in particular to a telescopic anchor bolt device for mine roadway support. Background Technology

[0002] As a major support component in mine roadways, the stability and reliability of rock bolts are crucial for controlling the surrounding rock and ensuring safe production.

[0003] In actual tunnel excavation and support processes, due to the complex and varied geological conditions, it is often difficult to maintain a completely consistent borehole depth. Traditional fixed-length anchor bolts are ill-suited to this situation, as insufficient length leads to inadequate anchoring force, while excessive length results in material waste and installation difficulties.

[0004] To improve support effectiveness, anchor bolts are typically installed using resin cartridges or other anchoring agents for filling and reinforcement. However, sealing the borehole opening, in particular, remains a challenge during installation. If the opening is not properly sealed, the anchoring agent can easily overflow under pressure, wasting material and severely impacting the anchoring quality and the tunnel's sealing performance.

[0005] Currently, although some adjustable-length anchor bolts have emerged, they often neglect ease of installation and reliability of orifice sealing. Existing anchor bolt devices generally lack an integrated design that can flexibly adapt to different drilling depths and automatically and reliably complete orifice sealing and reinforcement during installation.

[0006] Therefore, this utility model proposes a telescopic anchor bolt device for mine roadway support to overcome the shortcomings of the prior art. Utility Model Content

[0007] In view of the problems existing in the field of mine roadway support anchor bolts, such as fixed length, difficulty in adapting to drilling at different depths, and insufficient sealing of the hole opening during installation, which easily leads to overflow of anchoring agent, this utility model aims to provide a retractable anchor bolt device for mine roadway support with an improved structure that can effectively solve the above problems.

[0008] This utility model provides a telescopic anchor bolt device for mine roadway support, comprising: a main rod, a tray, and a nut; the tray is movably mounted on the main rod, and the nut is threaded onto the end of the main rod.

[0009] The device also includes a telescopic mechanism disposed inside the main rod and a reinforcing mechanism fitted onto the main rod.

[0010] The telescopic mechanism includes an extension rod inserted into the main rod, a fixing block fixed to the inner end of the extension rod, a limiting strip connected to the fixing block, and the limiting strip slidingly fitted into the internal groove of the main rod. A fixing ring is fixed to the opening at the end of the main rod. The telescopic mechanism also includes a fixing component for locking the extension rod and the main rod.

[0011] Furthermore, the reinforcement mechanism includes a placement block fitted onto the main rod and located between the tray and the tunnel wall. The placement block contains a resin cartridge, and the surface of the tray facing the placement block is fixed with a fixing pin and a stopper pad.

[0012] Preferably, the fixing component includes an embedded screw and a threaded ring. The embedded screw can pass through corresponding through holes on the main rod and the extension rod. The threaded ring is screwed onto the embedded screw. Tightening the threaded ring locks the embedded screw, thereby fixing the main rod and the extension rod.

[0013] Preferably, the fixing ring has a groove. In the locked state, the end of the embedded screw and the screw ring are both accommodated in the groove, so that the outer contour of the fixing component does not protrude from the surface of the main rod, which facilitates the insertion of the anchor rod into the drill hole.

[0014] Preferably, the fixing block can slide into the fixing ring when the extension rod extends, and the fixing ring blocks the extension rod from sliding out, thus forming a mechanical limit for the maximum extension of the extension rod.

[0015] Preferably, the stopper is arranged in a ring shape and located outside the fixing needle. The ring structure is used to surround and seal the edge of the placement block when the tray is squeezed. The fixing needle is located inside the ring stopper and is used to puncture the resin drug roll.

[0016] Preferably, the placement block has a hollow structure, which provides a space for the resin pill to be stored stably inside the placement block before installation, waiting to be punctured by the fixing needle.

[0017] Preferably, the limiting strips are evenly distributed along the outer periphery of the fixing block. This evenly distributed structure ensures that the fixing block is subjected to uniform force and stable guidance when sliding inside the main rod, preventing the extension rod from deflecting or rotating during the extension and retraction process.

[0018] Preferably, the main rod is a hollow tubular structure, and the extension rod is slidably fitted into the inner cavity of the main rod, thus realizing the telescopic accommodation function of the anchor rod by utilizing the hollow tubular structure.

[0019] This utility model has the following beneficial effects: 1. This utility model solves the problem of fixed anchor length and difficulty in adapting to drilling depths in the prior art by setting up a telescopic mechanism composed of a main rod, an extension rod, a fixing block, a limiting strip, a fixing ring, and a fixing component. It achieves the technical effect of being able to flexibly adjust the total length of the anchor rod according to the actual drilling depth, having strong applicability, and reliable locking.

[0020] 2. This utility model solves the problem of poor sealing of the hole and easy resin overflow during anchor installation in the prior art by setting up a reinforcement mechanism consisting of a tray, a fixing pin, a placement block, a resin cartridge, and a stopper. It achieves the technical effect of automatically puncturing the resin cartridge for filling when tightening the nut, and at the same time, the stopper provides a reliable seal and prevents overflow. It is easy to operate and has good sealing performance.

[0021] 3. This utility model solves the problem that the extension rod is prone to twisting during the extension process, which leads to inconvenient locking or unstable installation, by setting the limiting strip on the fixing block to slide with the groove in the main rod. It achieves the technical effect of accurately guiding the extension rod, preventing its rotation, improving the extension stability and locking reliability.

[0022] 4. This utility model solves the problem of locking components protruding from the rod surface and hindering the insertion of anchor rods into the drill hole by opening grooves on the fixing ring to accommodate the embedded screw and screw ring in the fixing component. It achieves the technical effect of keeping the surface of the anchor rod flat and smooth, and facilitating smooth insertion into the drill hole. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of a telescopic anchor bolt device for mine roadway support proposed in this utility model. Figure 2 This is a schematic diagram of the embedded screw of a telescopic anchor bolt device for mine roadway support proposed in this utility model. Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the placement block of a telescopic anchor bolt device for mine roadway support proposed in this utility model. Figure 5 for Figure 4 Enlarged view of section B in the middle.

[0024] Legend: 1. Main rod; 2. Tray; 3. Nut; 4. Telescopic mechanism; 41. Extension rod; 42. Fixing block; 43. Restriction strip; 44. Fixing ring; 45. Fixing assembly; 451. Embedded screw; 452. Threaded ring; 5. Reinforcing mechanism; 51. Plug pad; 52. Fixing pin; 53. Placement block; 54. Resin cartridge. Detailed Implementation Example

[0025] Reference Figures 1 to 5 This utility model provides a telescopic anchor bolt device for mine roadway support, which aims to solve the problems of fixed anchor bolt length in the prior art, which makes it difficult to adapt to drilling at different depths and the hole opening is not sealed.

[0026] like Figure 1 As shown, the telescopic anchor bolt device for mine roadway support includes a main rod 1, a tray 2 movably inserted through the main rod 1, and a nut 3 threaded onto the end of the main rod 1. The anchor bolt device also includes a telescopic mechanism 4 disposed inside the main rod 1 and a reinforcing mechanism 5 fitted onto the main rod 1. The main rod 1 has a hollow tubular structure. The telescopic mechanism 4 includes an extension rod 41 inserted into the inner cavity of the main rod 1. The extension rod 41 is slidably fitted into the inner cavity of the main rod 1. A fixing block 42 is fixed to the inner end of the extension rod 41. A limiting strip 43 is connected to the fixing block 42 and slidably fitted into the inner cavity of the main rod 1. The groove is recessed, and the limiting strip 43 is evenly distributed along the outer periphery of the fixing block 42. The fixing ring 44 is fixed to the opening at the end of the main rod 1. The fixing block 42 can slide into the fixing ring 44 and is restricted from sliding out by the fixing ring 44. The telescopic mechanism 4 also includes a fixing component 45, which is used to pass through the main rod 1 and the extension rod 41 to lock them together. Specifically, the fixing component 45 includes an embedded screw 451 and a threaded ring 452. The embedded screw 451 can pass through the corresponding through holes on the main rod 1 and the extension rod 41. The threaded ring 452 is screwed onto the embedded screw 451. Please refer to [reference needed]. Figure 2 and Figure 3 The retaining ring 44 has a groove, into which the end of the screw 451 and the screw ring 452 are accommodated in the locked state. The reinforcing mechanism 5 includes a placement block 53. Please refer to [reference needed]. Figure 4 and Figure 5 The placement block 53 is fitted onto the main rod 1 and located between the tray 2 and the tunnel wall. The placement block 53 has a hollow structure, and the resin cartridge 54 is contained within the hollow structure of the placement block 53. The reinforcement mechanism 5 also includes a fixing pin 52 and a stopper 51. The fixing pin 52 is fixed to the surface of the tray 2 facing the placement block 53, and the stopper 51 is fixed to the surface of the tray 2 facing the placement block 53. The stopper 51 is arranged in a ring shape and located outside the fixing pin 52.

[0027] Reference Figures 1 to 3The extension rod 41 of the telescopic mechanism 4 is slidably fitted into the inner cavity of the main rod 1, and the fixing block 42 is fixed to the inner end of the extension rod 41. A limiting strip 43 is connected to the outer periphery of the fixing block 42, and the limiting strip 43 is slidably fitted into the inner groove of the main rod 1. This fit structure ensures that the extension rod 41 can only slide along its axial direction inside the main rod 1 and will not rotate. A fixing ring 44 is fixed at the opening of the rod end of the main rod 1. When the extension rod 41 is fully extended, the fixing block 42 can slide into the fixing ring 44 and be restricted from sliding out by the fixing ring 44. This constitutes a mechanical limit on the telescopic stroke. After the extension rod 41 is adjusted to the required length, the fixing component 45 is used to lock the main rod 1 and the extension rod 41. The embedded screw 451 of the fixing component 45 can pass through the corresponding through holes on the main rod 1 and the extension rod 41, and the threaded ring 452 is screwed onto the embedded screw 451 to lock the two together. The groove on the retaining ring 44 is used to accommodate the end of the embedded screw 451 and the threaded ring 452 in the locked state. This design ensures that the retaining component 45 does not protrude from the surface of the main rod 1 and does not obstruct the insertion of the anchor bolt device into the borehole.

[0028] Reference Figure 1 , Figure 4 and Figure 5 The reinforcement mechanism 5 includes a placement block 53 fitted on the main rod 1. The placement block 53 is located between the tray 2 and the tunnel wall. The tray 2 is fixed with a fixing pin 52 and a plug pad 51, both of which face the surface of the placement block 53. Based on the above embodiments, the present invention may further include the following preferred technical solutions: In a preferred embodiment, in order to achieve uniform guidance and positioning, the limiting strips 43 are evenly distributed along the outer periphery of the fixing block 42; In another preferred embodiment, in order to reliably seal and puncture the resin cartridge 54, the stopper 51 is arranged in a ring shape and located outside the fixing needle 52. The stopper 51 is used to fit the placement block 53 when the tray 2 is squeezed to prevent resin from overflowing. In another preferred embodiment, in order to accommodate and protect the resin pill 54, the placement block 53 is a hollow structure, and the resin pill 54 is accommodated in the hollow structure so that it can be punctured by the fixing needle 52.

[0029] The working principle is as follows: In use, first adjust the length of the anchor rod, and pull the extension rod 41 out of the inner cavity of the main rod 1. The extension rod 41 drives the fixing block 42 fixed to its inner end to slide together. The limiting strip 43 connected to the fixing block 42 slides into the inner groove of the main rod 1. The structure limits the extension rod 41 to slide only along the axial direction and does not rotate. When the fixing block 42 slides into the fixing ring 44 fixed at the opening of the rod end of the main rod 1, the extension rod 41 reaches the maximum extension length and is limited. After adjusting to the required length, the embedded screw 451 of the fixing component 45 passes through the corresponding through holes of the main rod 1 and the extension rod 41, and the threaded ring 452 is screwed in, thereby locking the main rod 1 and the extension rod 41 into a rigid whole. The embedded screw 451 and the threaded ring 452 contained in the groove do not protrude from the surface of the main rod 1 and do not hinder subsequent insertion.

[0030] During installation, the anchor bolt device with adjusted length is inserted into the borehole along with the resin cartridge 54 inside the placement block 53. Then, the nut 3 at the end of the main rod 1 is screwed in. The nut 3 pushes the tray 2 against the tunnel wall. During the compression process, the fixing pin 52 fixed on the tray 2 will first puncture the resin cartridge 54 contained in the hollow structure of the placement block 53, releasing the resin. At the same time, the plugging pad 51 fixed on the tray 2 and located outside the fixing pin 52 will tightly adhere to the surface of the placement block 53 to form a seal and prevent the resin from overflowing, thereby achieving filling and sealing reinforcement of the borehole.

Claims

1. A telescopic anchor bolt device for mine roadway support, comprising: Main rod (1); The tray (2) is movably mounted on the main rod (1); Nut (3), threaded into the end of the main rod (1); The feature is that it further includes a telescopic mechanism (4) disposed inside the main rod (1) and a reinforcing mechanism (5) fitted on the main rod (1). The telescopic mechanism (4) includes: An extension rod (41) inserted into the main rod (1). A fixing block (42) is fixed to the inner end of the extension rod (41); A limiting strip (43) is connected to the fixing block (42) and slidably fitted into the internal groove of the main rod (1); A fixing ring (44) is fixed to the opening at the end of the main rod (1); A fixing component (45) is used to pass through the main rod (1) and the extension rod (41) to lock them together; The reinforcement mechanism (5) includes: Placement block (53) is fitted onto the main rod (1) and located between the tray (2) and the tunnel wall; The resin pill (54) is contained within the placement block (53); A fixing pin (52) is fixed to the surface of the tray (2) facing the placement block (53); A stopper (51) is fixed to the surface of the tray (2) facing the placement block (53).

2. The telescopic anchor bolt device for mine roadway support according to claim 1, characterized in that, The fixing component (45) includes an embedded screw (451) and a threaded ring (452). The embedded screw (451) can pass through corresponding through holes on the main rod (1) and the extension rod (41), and the threaded ring (452) is threaded onto the embedded screw (451).

3. A telescopic anchor bolt device for mine roadway support according to claim 2, characterized in that, The fixing ring (44) has a groove, and the end of the embedded screw (451) and the screw ring (452) are accommodated in the groove in the locked state.

4. The telescopic anchor bolt device for mine roadway support according to claim 1, characterized in that, The fixing block (42) can slide into the fixing ring (44) and is restricted from sliding out by the fixing ring (44).

5. A telescopic anchor bolt device for mine roadway support according to claim 1, characterized in that, The insert pad (51) is arranged in a ring shape and is located outside the fixing pin (52).

6. A telescopic anchor bolt device for mine roadway support according to claim 1, characterized in that, The placement block (53) has a hollow structure, and the resin drug roll (54) is housed within the hollow structure.

7. A telescopic anchor bolt device for mine roadway support according to claim 1, characterized in that, The limiting strips (43) are evenly distributed along the outer periphery of the fixing block (42).

8. A telescopic anchor bolt device for mine roadway support according to claim 1, characterized in that, The main rod (1) is a hollow tubular structure, and the extension rod (41) is slidably fitted into the inner cavity of the main rod (1).

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