Coal mine supporting anchor rod

Abstract

The utility model discloses a coal mine supporting anchor rod, which relates to the technical field of coal mine supporting, and comprises an anchor rod body, an adjustable outer sheath is sleeved outside the anchor rod body, the front end of the adjustable outer sheath is fixed with the anchor rod body through welding, the adjustable outer sheath comprises a sleeve, a threaded connector, a connecting pipe and an anti-pulling bulge, the anchor rod comprises an anchor rod body, an adjustable outer sheath is arranged outside the anchor rod body, two ends of each sleeve are provided with threaded connectors, a connecting pipe is arranged between every two adjacent sleeves, the connecting pipes are in threaded connection with the threaded connectors installed on the sleeves on the two sides, and anti-pulling protrusions are arranged on the surfaces of the connecting pipes. The adjustable outer sheath is provided with the anti-pulling protrusions, and the anti-pulling protrusions can increase the connecting area of the anchor rod and grouting slurry, so that the slurry and the anchor rod are combined more firmly, the anti-pulling capacity of the anchor rod is higher, installation is firmer, and then coal mine supporting is firmer.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal mine support technical field, concretely is a coal mine support anchor rod. BACKGROUND

[0002] At present, in coal mining, generally need to adopt the anchor rod and support. Anchor rod is the most basic component part in the contemporary coal mine roadway support, he consolidates the surrounding rock of roadway together, makes the surrounding rock self support. Now anchor rod is not only used in mine, also used in engineering technology, carries out the main body reinforcement to the side slope, tunnel, dam.

[0003] The existing coal mine support anchor rod and the mud between the bonding strength mainly depend on the mechanical bite cooperation of the screw thread, this connection mode is easy to loosen when long-term stress or external environment changes, leads to the bonding force to drop, and further will influence the stability of coal mine support. UTILITY MODEL CONTENTS

[0004] The utility model is provided with a kind of coal mine support anchor rod to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of coal mine support anchor rod, including anchor rod body, the outside of the anchor rod body is equipped with adjustable outer sheath, the front end of the adjustable outer sheath is fixed with anchor rod body by welding, the adjustable outer sheath includes sleeve, threaded connector, connecting pipe and anti-pulling protrusion, the both ends of the sleeve are equipped with threaded connector, connecting pipe is arranged between adjacent two sleeve, the connecting pipe is threadedly connected with threaded connector installed on both sides sleeve, the surface of the connecting pipe is provided with anti-pulling protrusion, the front end of the anchor rod body is provided with elastic anchor head, the elastic anchor head includes socket, ball head, plug, spring, slot and plug rod, the socket is fixed on anchor rod body, the socket is provided with slot in, the plug is arranged in the slot, the plug is installed with ball head, the plug is equipped with spring outside, the both ends of the spring are fixedly connected with socket and ball head, slot side is provided with the rod hole that penetrates socket, the rod hole is provided with plug rod.

[0007] As a further scheme of the utility model: the anti-pulling protrusion cross section is triangular, and the anti-pulling protrusion is arranged around the surface of the connecting pipe.

[0008] As a further scheme of the utility model: the one end of the plug rod in the slot is chamfered surface.

[0009] As a further scheme of the utility model: the plug rod is provided with limit block, and the limit block is slidably connected with the limit slot in the rod hole.

[0010] As a further scheme of the utility model: the plug rod is inclined and arranged forward in the socket.

[0011] As a further scheme of the utility model: the tail of the adjustable outer sheath is provided with a grout stopper, a backing plate is arranged on the rear anchor rod body of the grout stopper, and a nut is arranged on the anchor rod body at the rear of the backing plate.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1. The utility model discloses an adjustable outer sheath is arranged on the outside of the anchor rod body, and the adjustable outer sheath is provided with a pull-out resistant protrusion, so that the connecting area of the anchor rod and grouting slurry can be increased, the combination of the mud and the anchor rod is more firm, the pull-out resistance of the anchor rod is stronger, the installation is more firm, and the coal mine support is more firm.

[0014] 2. The utility model discloses that the parts of the adjustable outer sheath are spliced together in a threaded connection mode, the length can be adjusted according to the length of the anchor rod, so that the adjustable outer sheath can be matched with anchor rods of the same diameter and different lengths, the application range of the adjustable outer sheath is wider, and the practicality is stronger.

[0015] 3. The utility model discloses that the elastic anchor head is arranged, the elastic anchor head can be extruded to stretch out the plug rod to two sides in the process that the anchor rod is inserted into the borehole, the plug rod is inserted into the rock-soil in the borehole, the connecting firmness of the anchor rod and the inner wall of the borehole can be enhanced, meanwhile, the plug rod can make the combination of the anchor rod head and the mud stronger, and the anchoring effect of the anchor rod is better. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of a coal mine support anchor rod.

[0017] Figure 2 It is a coal mine support anchor rod Figure 1 It is a whole structure schematic view of an adjustable outer sheath of a coal mine support anchor rod.

[0018] Figure 3 It is a coal mine support anchor rod Figure 1 It is an internal structure schematic view of an elastic anchor head of a coal mine support anchor rod.

[0019] 1, anchor rod body;2, adjustable outer sheath;3, grout stopper;4, backing plate;5, nut;6, elastic anchor head;7, socket;8, ball head;9, plug;10, spring;11, insertion groove;12, plug rod;13, rod hole;14, limiting block;15, limiting groove;16, sleeve;17, threaded connection head;18, connecting pipe;19, pull-out resistant protrusion. DETAILED DESCRIPTION

[0020] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] Please refer to Figures 1-2 In the embodiment of the present application, a coal mine supporting anchor rod comprises an anchor rod body 1, an adjustable outer sheath 2 is arranged outside the anchor rod body 1, the front end of the adjustable outer sheath 2 is fixed to the anchor rod body 1 by welding, the adjustable outer sheath 2 comprises a sleeve 16, a threaded connector 17, a connecting pipe 18 and a pull-out resistant protrusion 19, the threaded connector 17 is arranged at both ends of the sleeve 16, the connecting pipe 18 is arranged between the adjacent two sleeves 16, the connecting pipe 18 is threadedly connected to the threaded connectors 17 arranged on the sleeves 16 on both sides, and the pull-out resistant protrusion 19 is arranged on the surface of the connecting pipe 18.

[0022] The pull-out resistant protrusion 19 is triangular in cross section, and the pull-out resistant protrusion 19 is arranged around the surface of the connecting pipe 18. The pull-out resistant protrusion 19 in this shape can make the adjustable outer sheath 2 form a sawtooth-shaped contact with the mud, thereby improving the connection strength and making the anchor rod more firmly installed.

[0023] Please refer to Figure 1 and Figure 3 The front end of the anchor rod body 1 is provided with an elastic anchor head 6, the elastic anchor head 6 comprises a socket 7, a ball head 8, a plug 9, a spring 10, a slot 11 and a plug rod 12, the socket 7 is fixed to the anchor rod body 1, the slot 11 is arranged in the socket 7, the plug 9 is arranged in the slot 11, the ball head 8 is arranged on the plug 9, the spring 10 is arranged outside the plug 9, the two ends of the spring 10 are fixedly connected to the socket 7 and the ball head 8 respectively, the rod hole 13 penetrating through the socket 7 is arranged on both sides of the slot 11, and the plug rod 12 is arranged in the rod hole 13.

[0024] One end of the plug rod 12 in the slot 11 is a bevel surface, and the design of the bevel surface can make the plug 9 apply lateral pressure to the plug rod 12 when the plug rod 12 and the plug 9 are in contact, so that the plug rod 12 is smoothly ejected from the socket 7;

[0025] The limiting block 14 is arranged on the plug rod 12, the limiting block 14 and the limiting slot 15 arranged in the rod hole 13 are in sliding fit, and the cooperation of the limiting block 14 and the limiting slot 15 can make the plug rod 12 not completely extend out of the socket 7, so that the plug rod 12 always cooperates with the socket 7 to play a role;

[0026] The plug rod 12 is obliquely arranged towards the front in the socket 7, so that the length of the plug rod 12 can be longer than that of the horizontal arrangement, and the plug rod 12 is more easily pushed out of the socket 7 by the plug 9.

[0027] Please refer to Figure 1 The tail of the adjustable outer sheath 2 is provided with a grout stopper 3, the rear anchor rod body 1 of the grout stopper 3 is sleeved with a backing plate 4, and the anchor rod body 1 at the rear of the backing plate 4 is provided with a nut 5.

[0028] The working principle of the utility model is: in use, first drill the anchor rod hole for inserting the anchor rod on the wall of the coal mine tunnel, then insert the anchor rod body 1 into the anchor rod hole, when the elastic anchor head 6 at the front of the anchor rod body 1 contacts the hole bottom of the anchor rod hole and generates extrusion, the ball head 8 on the elastic anchor head 6 is extruded to drive the spring 10 to contract and drive the plug 9 to gradually insert into the slot 11, the plug 9 is extruded with the plug rod 12 in the process of inserting into the slot 11, the plug rod 12 is extruded to extend outwards through the rod hole 13, so that the plug rod 12 is clamped into the rock soil of the anchor rod hole, then mud is injected into the interstice of the anchor rod hole, and the grout stopper 3 is inserted to block, finally the backing plate 4 is fixed on the side wall of the coal mine tunnel through the threaded cooperation of the nut 5 and the anchor rod.

[0029] It should be noted that in this text, such as the term "including", "containing" or any other variant is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0030] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A coal mine support anchor rod comprising an anchor rod body (1), characterized in that: The outer sleeve of the anchor rod body (1) is sleeved with an adjustable outer sleeve (2), the front end of the adjustable outer sleeve (2) is fixed with the anchor rod body (1) by welding, the adjustable outer sleeve (2) comprises a sleeve (16), a threaded connector (17), a connecting pipe (18) and a anti-pulling protrusion (19), threaded connectors (17) are installed at both ends of the sleeve (16), a connecting pipe (18) is arranged between adjacent two sleeves (16), the connecting pipe (18) is threadedly connected with the threaded connectors (17) installed on the sleeves (16) on both sides, the connecting pipe (18) is provided with an anti-pulling protrusion (19) on the surface, the front end of the anchor rod body (1) is provided with an elastic anchor head (6), the elastic anchor head (6) comprises a socket (7), a ball head (8), a plug (9), a spring (10), a slot (11) and a plug rod (12), the socket (7) is fixed on the anchor rod body (1), the socket (7) is provided with a slot (11) in the inside, the slot (11) is provided with a plug (9) in the inside, the plug (9) is installed with a ball head (8), the plug (9) is sleeved with a spring (10) outside, the both ends of the spring (10) are fixedly connected with the socket (7) and the ball head (8) respectively, the slot (11) is provided with a rod hole (13) penetrating through the socket (7) on both sides, the rod hole (13) is provided with a plug rod (12).

2. A coal mine support roof-bolt according to claim 1 wherein: The anti-pulling protrusion (19) is triangular in cross section, and the anti-pulling protrusion (19) is arranged around the surface of the connecting pipe (18).

3. A coal mine support roof-bolt as claimed in claim 1 wherein: The end of the plug rod (12) located in the slot (11) is chamfered.

4. A coal mine support roof-bolt as claimed in claim 1 wherein: The plug rod (12) is provided with a limiting block (14), and the limiting block (14) is in sliding fit with a limiting groove (15) arranged in the rod hole (13).

5. A coal mine support roof-bolt as claimed in claim 1 wherein: The plug rod (12) is inclined forward in the socket (7).

6. A coal mine support roof-bolt as claimed in claim 1 wherein: The tail of the adjustable outer sleeve (2) is provided with a grout stopper (3), the rear of the grout stopper (3) is sleeved with a backing plate (4) on the anchor rod body (1), and the anchor rod body (1) at the rear of the backing plate (4) is installed with a nut (5).

Images