Roof drilling anchor rod (cable) centering stirring device

Abstract

The utility model discloses a top plate drilling anchor rod (cable) centering stirring device, which relates to the technical field of anchoring, and comprises two parts, namely a centering device and a stirring device, the centering device mainly comprises a centering through sleeve, a plurality of elastic sheets are uniformly arranged on the periphery of the centering through sleeve at intervals around a central shaft of the centering through sleeve, and the elastic sheets are arranged on the periphery of the centering through sleeve. The plurality of spring pieces are respectively fixed on the elastic sheet; the device is arranged on an anchor rod, when the anchor rod extends into a drill hole, due to the fact that a plurality of elastic pieces and springs are arranged in the device, the surrounding elastic pieces can be evenly attached to the inner wall of the drill hole, the anchor rod is located at the central axis position all the time due to the elastic effect of the springs, the elastic pieces are flexible steel pieces, and the effective telescopic effect can be achieved; therefore, for drilling holes with different hole diameters, the device can adapt to different hole diameters, and is free, flexible, simple and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of anchoring, in particular to a top plate drilling anchor rod (cable) centering stirring device. Background Art

[0002] Anchor rods are the most basic component of tunnel support in contemporary coal mines. They can reinforce the surrounding rock of the tunnel and make the surrounding rock support itself. Anchor rods are not only used in mines, but also in engineering technology. They are mainly an active support form for reinforcing slopes, tunnels, and dam bodies. As a tensile member deep in the stratum, the anchor rod is connected to the engineering structure at one end and deep in the stratum at the other end. The whole anchor rod is divided into a free section and an anchoring section. The free section refers to the area where the tension at the anchor rod head is transmitted to the anchor body. Its function is to apply prestress to the anchor rod. The main reason for the mining anchor cable is that the length of the steel hinge wire is not limited, so the anchor ring section can be anchored on the hard roof. At the same time, due to the high strength level of the steel hinge wire, it can provide a large prestress, so that the composite roof under the anchor group section is united to form a unified rigid roof, which has a better support effect.

[0003] At present, the main support form of coal mines is still active support using anchor rods (cables). When anchor rods (cables) are used for support in underground coal mine tunnels, due to the long length and heavy weight of the anchor rods (cables), when the anchor rods (cables) are extended into the borehole, the internal situation cannot be clear, and the anchor rods (cables) cannot be guaranteed to be always in the center. It is very likely that the anchor rods (cables) will tilt in the hole, resulting in the anchoring agent not being completely leaked and the anchor rods (cables) being attached to the rock formation hole wall, resulting in poor anchoring effect, uneven force, and waste of anchoring agent, and a good anchoring effect cannot be obtained. Therefore, in view of the above phenomenon, it is urgent to design and produce a top plate drilling anchor rod (cable) center stirring device to meet the needs of actual use. Utility Model Content

[0004] The utility model provides a top plate drilling anchor rod (cable) centering stirring device, which solves the technical problems in the background technology.

[0005] In order to solve the above technical problems, the utility model provides a top plate drilling anchor rod (cable) centering stirring device, which includes two major parts, namely a centering device and a stirring device.

[0006] Preferably, the centering device mainly includes a centering through sleeve, a plurality of elastic sheets are arranged around the central axis of the centering through sleeve and are evenly spaced on the periphery thereof, and a plurality of spring members are respectively fixed on the elastic sheets.

[0007] Preferably, the plurality of spring members are fixed between the elastic sheet and the central through sleeve, and their main function is to connect the plurality of elastic sheets to the central through sleeve so that they can freely expand and contract to adapt to the size of the drilling hole.

[0008] Preferably, the plurality of elastic sheets are flexible steel sheets.

[0009] Preferably, the stirring device portion includes a toothed tip, a central sleeve and a plurality of spiral arms, all of which are arranged on the central sleeve.

[0010] Preferably, a plurality of spiral arms surround the central axis of the central sleeve and are evenly spaced around it.

[0011] Preferably, the toothed tip and the spiral arm tip are both sharp.

[0012] Compared with the related art, the top plate drilling anchor rod (cable) center stirring device provided by the utility model has the following beneficial effects:

[0013] The utility model provides a top plate drilling anchor rod (cable) center stirring device, which is installed on the anchor rod. When the anchor rod is extended into the drill hole, since a plurality of elastic sheets and springs are arranged in the device, the surrounding elastic sheets will be evenly attached to the inner wall of the drill hole, and due to the elastic effect of the spring, the anchor rod is always in the position of the central axis, and the elastic sheet is a flexible steel sheet, which can play an effective telescopic role. Therefore, for drill holes with different apertures, the device can adapt to different aperture sizes, and is free, flexible, simple and convenient.

[0014] The utility model provides a central stirring device for a top plate drilling anchor rod (cable), which is installed on the top of the anchor rod. When the anchor rod is extended into the borehole, the surrounding spiral arms and toothed tips are sharper, so it is easier to pierce the outer skin of the anchor agent at the upper end, so that the anchor agent can be more fully and evenly diffused around the anchor rod (cable), so that the anchor agent can play an anchoring role more quickly, the anchoring efficiency is improved, and the waste of the anchor agent is reduced to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the centering device;

[0016] Figure 2 for Figure 1 Sectional view along line AA;

[0017] Figure 3 It is a front view of the structure of the stirring device;

[0018] Figure 4 for Figure 3 Side view of

[0019] Figure 5 for Figure 3 Sectional view along line AA;

[0020] Figure 6 for Figure 3Sectional view along the midline BB;

[0021] Figure 7 This is a diagram showing the use status of the anchor rod (cable) central stirring device of the utility model.

[0022] Numbers in the figure: 1, central through sleeve; 2, elastic sheet; 3, spring member; 4, anchor rod (cable); 5, toothed tip; 6, spiral arm; 7, center sleeve. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific examples.

[0024] Depend on Figure 1-7 As shown, the utility model includes two major parts, namely a centering device and a stirring device. The centering device mainly includes a centering through sleeve 1, a plurality of elastic sheets 2 are arranged around the central axis of the centering through sleeve 1 and are evenly spaced around its periphery, and a plurality of spring members 3 are respectively fixed on the elastic sheets 2. The plurality of spring members 3 are fixed between the elastic sheets 2 and the centering through sleeve 1, and their main function is to connect the plurality of elastic sheets 2 to the centering through sleeve 1 so that they can freely expand and contract to adapt to the size of the borehole diameter. The plurality of elastic sheets 2 are flexible steel sheets. The stirring device part includes a toothed tip 5, a center sleeve 7 and a plurality of spiral arms 6, all of which are arranged on the center sleeve 7. The plurality of spiral arms 6 surround the central axis of the center sleeve 7 and are evenly spaced around it. The tips of the toothed tip 5 and the spiral arms 6 are both sharp.

[0025] Figure 7 An example of the top plate drilling and centering stirring device of the utility model is shown. Figure 1 , Figure 3 There are two major parts of the utility model, namely, a centering device part and a stirring device part, wherein the stirring device part is installed on the top of the anchor rod (cable) 4, and the centering device part is arranged at a certain size distance within the length range of the anchor rod (cable) 4.

[0026] When in use, first place the stirring device on the top of the anchor rod (cable) 4 used, and press it with a little force to fix the stirring device tightly to one end of the anchor rod (cable) 4. Then, insert the centering device assembly into the anchor rod (cable) 4 from the other end of the anchor rod (cable) 4 and place it in an appropriate position. According to actual needs, a centering device assembly can be inserted at a certain interval, and the elastic sheet 2 in the assembly is arched outward. When the anchor rod (cable) 4 is extended into the borehole, the anchoring agent is placed above the stirring device of the anchor rod (cable) 4 and pushed into the borehole together with the anchor rod (cable) 4. As the anchor rod (cable) 4 goes deeper, the elastic sheet 2 on its centering device assembly is close to the inner wall of the borehole, the spring shrinks automatically, and exerts an interaction force on the elastic sheet 2 and the centering through sleeve, so that the anchor rod (cable) 4 tends to coincide with the central axis of the anchor rod borehole, so that the anchor rod (cable) 4 gradually tends to the center position.

[0027] As the anchor rod (cable) 4 gradually penetrates deeper, when the anchor rod (cable) 4 extends into the terminal, a slight upward thrust is applied to the anchor rod (cable) 4, and the toothed tip 5 of the stirring device will pierce the outer skin of the resin anchor, thereby releasing the anchor. Due to the central location of the anchor rod (cable) 4, the anchor will be more fully and evenly distributed around the anchor rod (cable) 4 and tightly adhere to the inner wall of the borehole, so that the anchor rod (cable) 4 is stabilized in the overlying rock formation, thereby achieving full use of the anchor and reducing waste of resources.

[0028] The device has a simple structure and is easy to operate. The number of centering device assemblies can be customized, and the intervals can be adjusted according to one's own needs. It can also ensure that the anchor rod (cable) 4 is always located at the center axis position; the stirring device part can release a large amount of anchoring agent more quickly and more safely, giving full play to the anchoring effect.

[0029] For the convenience of construction, the maximum outer diameter of the elastic sheet 2 in the anchor rod (cable) 4 after arching can be slightly larger than the borehole diameter, so that the centering device can be more stable and easier to play a role. In addition, the centering device part can be arranged in groups at intervals of 1.5m to 2.5m.

[0030] In this embodiment, the centering device part includes a plurality of elastic sheets 2 and a plurality of spring members 3. Each spring member 3 is inserted into the center through sleeve and is tightly connected to each of the peripheral elastic sheets 2, thereby increasing the stability of the device.

[0031] Specifically, the center through sleeve is composed of an ordinary steel pipe with a length of about 5 cm. In order to ensure that the centering device can be better locked on the anchor rod (cable) 4, the inner diameter of the sleeve is set to be 1-2 mm larger than the diameter of the anchor rod (cable) 4, and the thickness of the sleeve should not be less than 2 mm. The elastic sheets 2 are made of flexible steel sheets with a thickness of about 0.8 mm, a width of 8-10 mm, and a length of 100-150 mm. There are 8 elastic sheets 2, and the circumferential spacing between two adjacent elastic sheets 2 is 45°. The inner diameter of the stirring device is 1-2 mm larger than the anchor rod (cable) 4, and the thickness of the center sleeve 7 is about 3 mm.

[0032] Although the utility model has been disclosed as above with preferred examples, it is not intended to limit the utility model. Any technician familiar with the field can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the utility model without departing from the scope of the technical solution of the utility model, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model should fall within the scope of protection of the technical solution of the utility model.

Claims

1. A top plate drilling anchor rod (cable) center stirring device, characterized by: It consists of two parts, namely a centering device and a stirring device; The centering device mainly comprises a centering through sleeve (1), a plurality of elastic sheets (2) arranged around the central axis of the centering through sleeve (1) at even intervals on its periphery, and a plurality of spring members (3) respectively fixed on the elastic sheets (2); The plurality of spring members (3) are fixed between the elastic sheet (2) and the central through sleeve (1), and their main function is to connect the plurality of elastic sheets (2) to the central through sleeve (1) so that the plurality of spring members (3) can freely expand and contract to adapt to the size of the drilling hole.

2. A top plate drilling anchor (cable) center stirring device according to claim 1, characterized in that: The multiple elastic sheets (2) are flexible steel sheets.

3. A top plate drilling anchor (cable) center stirring device according to claim 1, characterized in that: The stirring device part comprises a toothed tip (5), a central sleeve (7), and a plurality of spiral arms (6), all of which are arranged on the central sleeve (7).

4. A top plate drilling anchor (cable) center stirring device according to claim 3, characterized in that: A plurality of spiral arms (6) surround the central axis of the central sleeve (7) and are evenly spaced around it.

5. A top plate drilling anchor (cable) center stirring device according to any one of claims 3-4, characterized in that: The tips of the toothed tip (5) and the spiral arm (6) are both relatively sharp.

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