In-hole anchoring device

Abstract

The utility model provides an in-hole anchoring device which comprises an outer sleeve which is cylindrical in appearance, the interior of the outer sleeve is a big-end-up circular-truncated-cone-shaped hollow part, anti-skid lines are arranged on the outer side of the outer sleeve, four expansion openings are formed in the upper half portion of the outer sleeve and used for being opened to make contact with a rock wall to provide supporting friction, and four grooves are formed in the lower half portion of the outer sleeve. The inner sleeve is of a three-petal type clamping structure composed of three identical arc-shaped modules, is in a hollow circular truncated cone shape, is provided with anti-skid lines on the inner side, is used for clamping an anchor cable, and is placed in the outer sleeve in a mode that the upper portion is thick and the lower portion is thin. And the head cap is inserted into the expansion port of the outer sleeve through two clamping blocks at the bottom, is mounted at the top of the outer sleeve and is used for limiting the moving distance of the inner sleeve of the anchoring device and the length of the anchor cable entering the device. According to the device, the anchor cable fixing process is optimized, an anchoring agent does not need to be used, and the waiting time is shortened; under special conditions, a plurality of anchoring devices can be connected in series to increase the acting force; the anti-skid lines can increase friction force between the outer sleeve and the rock wall and between the inner sleeve and the anchor cable.

Description

Technical Field

[0001] The utility model belongs to the field of mine support applications, and particularly relates to an in-hole anchoring device. Background Art

[0002] At present, when implementing anchor cable fixing operations, it is necessary to use anchoring agents in the drill hole for fixing. Since the construction process is cumbersome and it takes time to wait for the anchoring agent to solidify, it is necessary to design an in-hole anchor cable anchoring device to simplify the operation process and improve the operation efficiency while ensuring the anchoring strength. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide an in-hole anchoring device, which can provide support for the anchor cable in the drilled hole, is convenient and quick to use, and can effectively avoid the above-mentioned shortcomings.

[0004] The outer shell is cylindrical in appearance, with a hollow truncated cone-shaped structure that is larger at the top and smaller at the bottom. It is used to provide support in the drill hole. The outer surface has anti-slip grooves, four expansion ports on the upper part, and four grooves on the lower part.

[0005] Preferably, there are four barb-stopping mechanisms installed in the outer groove of the outer sleeve, which are composed of barbs and outer sleeve spring rings, and are used to make the anchoring device stuck to the rock wall to prevent it from retreating and falling off;

[0006] A barb, mounted on the outer sleeve groove cylinder, can rotate inwardly but is limited in outward rotation;

[0007] The outer spring ring is installed at the tail of the barb and is used to keep the barb stop mechanism in an open state;

[0008] A compression spring is placed on the bottom spring seat inside the outer sleeve and is used to provide elastic force for the inner sleeve to keep it in a partially popped-out state, so that the anchor cable can enter the inner sleeve;

[0009] Preferably, the inner sleeve is composed of three identical arc-shaped modules forming a three-petal clamping structure, which is in the shape of a hollow truncated cone and is placed in the outer sleeve in a thick upper and thin lower state. The thick end of the upper sleeve has a circle of grooves, and the thin end has an inward chamfer to facilitate the entry of the anchor cable. The inner side of the inner sleeve is covered with anti-slip grooves to increase friction and clamp the anchor cable.

[0010] The inner sleeve spring ring is installed in the groove at the upper end of the inner sleeve, and the inner sleeve is kept in a truncated cone-shaped assembly state by fixing the upper part of the inner sleeve;

[0011] The head cap is inserted into the expansion port of the outer shell through the two clamping blocks at the bottom and installed on the top of the outer shell to limit the movement distance of the inner shell of the anchoring device and the length of the anchor cable entering the device;

[0012] Beneficial effects

[0013] (1) Simple structure, simple process, easy to use and easy to promote;

[0014] (2) Optimize the anchor cable fixing process, eliminating the need for anchoring agents and reducing waiting time;

[0015] (3) In special cases, multiple anchoring devices can be used in series to increase the force;

[0016] (4) The anti-slip pattern can increase the friction between the outer sleeve and the rock wall and between the inner sleeve and the anchor cable;

[0017] (5) When the barb stop mechanism enters the borehole, it can expand the outer spring coil outward under the action of pressure, and the barb is retracted into the groove to facilitate the anchor device to enter the borehole. When the anchor device reaches the bottom of the hole, the barb opens under the action of the tension of the outer spring coil. The barb stop mechanism is stressed but the shaft cannot rotate outward. The barb will be stuck to the rock wall outward, preventing the anchor device from sliding down and preventing the anchor device from falling off when being pushed in the borehole.

[0018] (6) Under the influence of the downward force, the anchor cable drives the inner sleeve to expand. The inner sleeve exerts a contraction force on the anchor cable inward and exerts an outward expansion force on the outer sleeve. When the outer sleeve is subjected to the outward expansion force, the four expansion ports at its upper end open and interact with the rock wall, thereby firmly anchoring it in the hole, so that the pull-out force meets the relevant standards and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 A cross-sectional view of the in-hole anchoring device.

[0021] Figure 2 Exploded view of the in-hole anchoring device.

[0022] In the figure: 1. outer sleeve, 2. outer sleeve spring coil, 3. barb, 4. compression spring, 5. inner sleeve, 6. inner sleeve spring coil, 7. head cap. DETAILED DESCRIPTION

[0023] The present invention is described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention is the technical solutions described in the claims, including equivalent alternatives to the technical features of the technical solutions described in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

[0024] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. Figure 1 The orientation is referenced.

[0025] Example 1

[0026] like Figure 1 , Figure 2 In the invention, an in-hole anchoring device is provided, wherein the outer sleeve 1 is in a hollow cylindrical shape, and the four grooves on the outer side are provided with barb stop mechanisms, the barbs 3 are kept open by the outer sleeve spring coil 2, the compression spring 4 is placed on the base at the middle bottom of the outer sleeve, the inner sleeve 5 is placed in the outer sleeve 1, the bottom of the narrow opening is connected to the compression spring 4, and a head cap 7 is installed on the top of the outer sleeve 1, which is fixed by inserting a card block into the expansion opening gap of the outer sleeve 1;

[0027] The outer cover 1 is cylindrical in appearance, with annular anti-slip grooves on the outside. The inside is a hollow truncated cone with a larger top and a smaller bottom. The lower part has four grooves, and the upper part has four expansion ports. The expansion ports can be used to expand the outer cover 1 to increase the friction with the rock wall, so that the anchor cable is fixed in the drill hole.

[0028] The barb 3 is mounted on the cylindrical groove on the outer side of the outer sleeve 1. Due to the shape of the barb 3, it can rotate into the groove, but is limited when rotating out of the groove;

[0029] The outer sleeve spring ring 2 is installed between the bottom of the barb 3 and the groove of the outer sleeve 1, and normally keeps the barb 3 in an open state;

[0030] The compression spring 4 is placed on the bottom spring seat inside the outer sleeve 1 to provide an upward elastic force to the inner sleeve 5 to facilitate the entry of the anchor cable into the inner sleeve 5;

[0031] The inner sleeve 5 is composed of three identical arc-shaped modules forming a three-petal clamping structure. It is in the shape of a hollow truncated cone and is placed in the outer sleeve in a state of being thick at the top and thin at the bottom. The thick end of the upper part has a circle of grooves, and the thin end has an inward chamfer to facilitate the entry of the anchor cable. The inside of the inner sleeve is covered with anti-slip grooves to increase friction and clamp the anchor cable.

[0032] The inner sleeve spring ring 6 is placed in the groove at the top of the thick end of the inner sleeve 5 to provide a tightening for the inner sleeve 5 so that it remains in the assembled state. When the anchor cable passes through the middle of the inner sleeve 5, the three-petal clamping structure can be opened;

[0033] The head cap 7 is installed above the outer shell 1 and is fixed by inserting the two clamping blocks at the bottom into the expansion opening of the outer shell 1. There is a hole inside to limit the movement distance of the inner sleeve 5 of the anchor device and the anchor cable in the drilled hole. When the outer shell 1 is opened from the expansion opening, the head cap 7 will lose its fixation and fall off.

[0034] Example 2

[0035] When performing the anchor cable fixing operation, the following operating steps are performed: the anchor cable head passes through the bottom of the anchor device outer sleeve 1, through the compression spring 4, the anchor device inner sleeve 5 to the head cap 7, and drives the entire device up to the hole. After reaching the bottom of the hole, the four barbs 3 at the tail end of the device are freely opened under the action of the tension of the outer sleeve spring coil 2. The tips of the barbs 3 form a blockage with the rock layer of the hole wall, preventing the device from sliding down. At the same time, under the downward force of the anchor cable, the inner sleeve 5 is driven to expand and descend. At the same time, the inner sleeve 5 is subjected to two forces: one is the inward contraction force exerted on the anchor cable; the other is the outward expansion force exerted on the outer sleeve 1. When the outer sleeve 1 is subjected to the outward expansion force, the four expansion ports on the outer sleeve open accordingly. That is, the greater the downward force of the anchor cable, the greater the inward contraction force of the inner sleeve 5 and the outward expansion force of the outer sleeve 1, which can form a more solid anchoring effect in the hole.

[0036] In the present invention, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection between two elements or the interaction relationship between two elements.

[0037] In the present invention, unless otherwise expressly specified or limited, when a first feature is “above” or “below” a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above,” “above,” or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

Claims

1. An in-hole anchoring device, characterized in that: It includes a jacket (1) with a cylindrical appearance and a hollow truncated cone with a larger upper portion and a smaller lower portion. The outer side has anti-slip lines. The upper part has four expansion openings for opening and contacting the rock wall to provide support friction. The lower part has four grooves. The inner sleeve (5) is composed of three identical arc-shaped modules forming a three-petal clamping structure, is in the shape of a hollow truncated cone, has anti-slip grooves on the inside, is used to clamp the anchor cable, and is placed in the outer sleeve (1) in a thick upper and thin lower manner; The head cap (7) is inserted into the expansion opening of the outer shell through two clamping blocks at the bottom and is installed on the top of the outer shell (1), and is used to limit the moving distance of the inner sleeve (5) of the anchoring device and the length of the anchor cable entering the device.

2. The in-hole anchoring device according to claim 1, characterized in that: The outer sleeve (1) further comprises four barb-shaped anti-retraction mechanisms, which are mounted on the outer groove cylinder of the outer sleeve (1) and are used to enable the anchoring device to be stuck on the rock wall to prevent it from falling back; The compression spring (4) is placed on the bottom spring seat inside the outer sleeve (1) and is used to provide elastic force for the inner sleeve (5) to keep it in a partially popped-out state, so as to facilitate the entry of the anchor cable into the inner sleeve (5).

3. The in-hole anchoring device according to claim 1, characterized in that: The inner sleeve (5) further comprises an inner sleeve spring ring (6) which is installed in the upper thick end groove of the inner sleeve (5) and maintains the truncated cone-shaped assembly state of the inner sleeve (5) by fixing the upper part of the inner sleeve (5).

4. The in-hole anchoring device according to claim 2, characterized in that: The barb stop mechanism comprises a barb (3) mounted on the groove cylinder of the outer sleeve (1), which can rotate inwards and is limited in outward rotation, and is used to clamp the rock wall to prevent it from falling off; The outer spring ring (2) is mounted on the tail of the barb (3) and is used to keep the barb (3) in an open state.

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