Device for detecting tensile strength of mining anchor cable

Abstract

The utility model relates to the technical field of anchor cable tensile strength detection, in particular to a mining anchor cable tensile strength detection device which comprises a hydraulic cylinder, the hydraulic cylinder is of a hollow structure, a first oil pipe and a second oil pipe are arranged at the upper end and the lower end of the side face of the hydraulic cylinder, and a telescopic rod is arranged at the upper end of the hydraulic cylinder and is of a hollow structure. A fastening assembly is fixedly arranged at the upper end of the telescopic rod. The annular groove is formed in the extrusion plate, so that the friction force between the extrusion plate and the anchor cable can be improved, and the fixing stability of the anchor cable is improved; when the extrusion disc moves, all the inclined blocks can be driven to move by the same distance at the same time, so that extrusion force borne by all the anchor cables is the same, pulling force borne by the anchor cables during working is the same, the anchor cables are evenly stressed, and the anchor cables are prevented from being broken due to concentrated stress. All the anchor cables can be fastened at the same time only by rotating, and the fastening and mounting efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to anchor cable tensile strength detection technical field, especially in mine anchor cable tensile strength detection device. BACKGROUND

[0002] In the mining process, a tunnel is usually excavated to facilitate the transportation of ore, and the anchor cable is usually used to reinforce the tunnel to prevent tunnel collapse. In order to detect whether the anchor cable engineering can truly play an anchoring role on the engineering that needs to be reinforced or whether the anchoring role meets the expected requirements, the tensile strength of the anchor cable needs to be detected, that is, the anchor cable needs to be pulled out for testing.

[0003] The existing anchor cable pull-out test is generally carried out by a pull-out tester, which generally includes a hydraulic station, a hydraulic pump, and a tensioning pull-out device. The hydraulic station and the hydraulic pump can be replaced by a manual hydraulic pump to meet the requirements of on-site carrying and use. By sending hydraulic oil into the tensioning pull-out device, the tensioning element is opened, and the anchor cable fixed between the tensioning elements is pulled, so as to evaluate whether the anchor cable can withstand the tension specified in the construction standard.

[0004] In order to improve the anchoring strength, multiple anchor cables are usually provided. During the anchor cable pull-out test, workers usually use a hammer to strike the tensioning element to clamp the anchor cable, and then pull out the anchor cable through the hydraulic pull-out device. This causes a long and tedious process of fixing the anchor cable. At the same time, the hammer striking the tensioning element causes the fastening force between the tensioning element and the anchor cable to be different, causing uneven stress on different anchor cables during the pull-out test, resulting in distorted experimental data and easy breakage of single anchor cables due to concentrated stress. UTILITY MODEL CONTENTS

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a mine anchor cable tensile strength detection device.

[0006] The utility model provides a mine anchor cable tensile strength detection device, which comprises a hydraulic cylinder, the hydraulic cylinder is a hollow structure and is provided with an oil pipe one and an oil pipe two on the upper and lower ends of the side surface, the upper end of the hydraulic cylinder is provided with a telescopic rod, the telescopic rod is a hollow structure, and the upper end of the telescopic rod is fixedly provided with a fastening assembly.

[0007] The fastening assembly comprises a support disc, the support disc is uniformly provided with a plurality of tensioning devices, the tensioning devices are cylindrical, and the tensioning devices are used for fastening the anchor cable. A pressing disc is slidably arranged on the upper side of the support disc, a rotating barrel is rotatably connected to the outer side of the pressing disc, and the rotating barrel is screwedly connected to the outer side of the support disc.

[0008] Further, the extrusion disc is uniformly provided with through holes corresponding to the tensioning device, a sliding cylinder is arranged on the lower side of the through hole, the sliding cylinder is slidingly sleeved on the outer side of the tensioning device, and an extrusion groove is arranged on the outer circumference of the upper side of the extrusion disc.

[0009] Further, the rotating drum is provided with a six-prong block connected with a wrench on the outer side, is provided with an internal thread in the inner side, and is connected with the external thread of the supporting disc, is provided with an extrusion flange in the inner side of the upper end, and the extrusion flange is slidingly connected in the extrusion groove of the extrusion disc.

[0010] Further, the tensioning device comprises a tensioning cylinder, a plurality of vertically arranged dovetail grooves are uniformly arranged in the tensioning cylinder, the included angle between the length direction of the dovetail groove and the axis of the tensioning cylinder is 45 degrees, a wedge block is slidingly connected in the dovetail groove, the wedge block comprises a dovetail sliding strip, the dovetail sliding strip slides in the dovetail groove, the dovetail sliding strip is connected with an extrusion plate through a connecting block, and a plurality of ring grooves are uniformly arranged in the inner side of the extrusion plate.

[0011] Further, the upper end of the dovetail sliding strip abuts against the extrusion disc, the lower side of the dovetail sliding strip abuts against a circular ring, the lower part of the circular ring abuts against a spring, and the lower end of the spring abuts against a limiting flange in the inner side of the lower end of the tensioning cylinder.

[0012] Further, the dovetail groove and the dovetail sliding strip are all arranged as three.

[0013] The beneficial effects achieved by the utility model are that the ring groove arranged on the extrusion plate can improve the friction between the extrusion plate and the anchor cable, thereby improving the fixing stability of the anchor cable. When the extrusion disc moves, all the inclined blocks can be simultaneously driven to move the same distance, so that all the anchor cables are subjected to the same extrusion force, the anchor cables are subjected to the same tension force during work, the anchor cables are subjected to uniform force, and the anchor cables are prevented from being pulled off due to force concentration; only the rotating of the rotating drum can simultaneously fasten all the anchor cables, and the fastening and installation efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure schematic view of the utility model;

[0015] Figure 2 It is a structure schematic view of the utility model fastening assembly;

[0016] Figure 3 It is an explosion structure schematic view of the utility model fastening assembly;

[0017] Figure 4 It is a structure schematic view of the utility model tensioning device;

[0018] Figure 5 It is a cross section structure schematic view of the utility model tensioning device;

[0019] Figure 6 The tensioning device explosion structure schematic view of the utility model.

[0020] Among them, 1 hydraulic cylinder, 11 telescopic rod, 12 oil pipe one, 13 oil pipe two, 14 anchor cable;

[0021] 2 fastening assembly, 21 support disc, 22 rotating drum, 221 extrusion flange, 222 internal thread, 23 extrusion disc, 231 sliding cylinder, 232 extrusion groove, 234 through hole;

[0022] 3 tensioning device, 31 tensioning cylinder, 311 limiting flange, 312 dovetail groove, 32 wedge block, 321 dovetail slide, 322 connecting block, 323 extrusion plate, 324 ring groove, 33 circular ring, 34 spring.

[0023] The drawings are used to provide further understanding of the utility model, and constitute a part of the specification, and are used together with the embodiments of the utility model to explain the utility model, and do not constitute the limitation of the utility model. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments; based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor are within the protection scope of the utility model.

[0025] As Figures 1-6 shown, the utility model provides a kind of mine anchor cable tensile strength detection device, including hydraulic cylinder 1, the hydraulic cylinder 1 is hollow structure and the oil pipe one 12 and oil pipe two 13 are provided with on upper and lower ends of side, the hydraulic cylinder 1 upper end is provided with telescopic rod 11, the telescopic rod 11 is hollow structure, and the telescopic rod 11 upper end is fixedly provided with fastening assembly 2.

[0026] Referring to Figure 2 and Figure 3 , the fastening assembly 2 includes support disc 21, the support disc 21 is uniformly distributed with a plurality of tensioning devices 3, the tensioning device 3 is cylindrical, the tensioning device 3 is used to fasten anchor cable 14, the extrusion disc 23 is slidably arranged on the upper side of the support disc 21, the rotating drum 22 is rotatably connected to the outside of the extrusion disc 23, and the rotating drum 22 is threadedly connected to the outside of the support disc 21.

[0027] Further, the extrusion disc 23 is uniformly distributed with through hole 234 corresponding to tensioning device 3, the sliding cylinder 231 is arranged on the lower side of the through hole 234, the sliding cylinder 231 is slidably arranged on the outside of the tensioning device 3, and the extrusion groove 232 is arranged on the outer circumference of the upper side of the extrusion disc 23.

[0028] Further, the outer side of the rotating drum 22 is provided with a six-prong block connected with a wrench, the inner side of the rotating drum 22 is provided with an internal thread 222, the internal thread 222 is connected with the external thread of the supporting disc 21, the upper end of the rotating drum 22 is provided with an extrusion flange 221, the extrusion flange 221 is slidingly connected in the extrusion groove 232 of the extrusion disc 23.

[0029] Further, referring to Figures 4-6 , the tensioning device 3 comprises a tensioning cylinder 31, a plurality of vertically arranged dovetail grooves 312 are uniformly distributed in the tensioning cylinder 31, the length direction of the dovetail groove 312 and the axis of the tensioning cylinder 31 form an angle of 5 degrees, a wedge block 32 is slidingly connected in the dovetail groove 312, the wedge block 32 comprises a dovetail sliding strip 321, the dovetail sliding strip 321 slides in the dovetail groove 312, the dovetail sliding strip 321 is connected with an extrusion plate 323 through a connecting block 322, a plurality of ring grooves 324 are uniformly distributed in the inner side of the extrusion plate 323.

[0030] Further, the upper end of the dovetail sliding strip 321 abuts against the extrusion disc 23, a circular ring 33 abuts against the lower side of the dovetail sliding strip 321, a spring 34 abuts against the lower part of the circular ring 33, the lower end of the spring 34 abuts against the limiting flange 311 on the inner side of the lower end of the tensioning cylinder 31.

[0031] Further, the dovetail groove 312 and the dovetail sliding strip 321 are each provided with three.

[0032] When working, the anchor tensile strength detection device of the new type is brought to the anchor in need of strength detection, like Figure 1 , the anchor is passed through the hydraulic cylinder 1 and the fastening assembly 2, when the hydraulic cylinder 1 is installed in place, the rotating drum 22 is rotated by a wrench at this time, the rotating drum 22 approaches the supporting disc 21, the extrusion disc 23 is driven by the rotating drum to approach the supporting disc 21, at this time the extrusion disc 22 will extrude the wedge block 32, all the wedge blocks 32 are simultaneously extruded by the tensioning cylinder 31 to the circular ring 33 and the spring 34, thereby sliding along the dovetail groove 312, since the dovetail groove 312 is obliquely arranged, the wedge block 32 will move radially to the center when sliding, the extrusion plate 323 will extrude the anchor, thereby realizing the fixation of the anchor, and then the hydraulic cylinder 1 is started to perform the detection operation.

[0033] Since the ring grooves 324 are arranged on the extrusion plate 323, the friction between the extrusion plate 323 and the anchor can be improved, thereby improving the fixation stability of the anchor. When the extrusion disc 22 moves, all the wedge blocks 32 can be simultaneously driven to move the same distance, so that all the anchors are subjected to the same extrusion force, the anchors are also subjected to the same tension force when working, so that the anchors are subjected to uniform force, preventing the anchors from being pulled off due to force concentration. Only the rotating drum 22 needs to be rotated to simultaneously fasten all the anchors, thereby improving the fastening and installation efficiency.

[0034] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A mine anchor cable tensile strength detection device, comprising a hydraulic cylinder (1), the hydraulic cylinder (1) is a hollow structure and is provided with an oil pipe one (12) and an oil pipe two (13) on the upper and lower ends of the side surface, the upper end of the hydraulic cylinder (1) is provided with a telescopic rod (11), the telescopic rod (11) is a hollow structure, the telescopic rod (11) is fixedly provided with a fastening assembly (2) at the upper end, characterized in that: the fastening assembly (2) comprises a support disc (21), the support disc (21) is uniformly distributed with a plurality of tensioning devices (3), the tensioning device (3) is cylindrical, the tensioning device (3) is used for fastening an anchor cable (14), the support disc (21) is slidably provided with an extrusion disc (23) on the upper side, the extrusion disc (23) is rotatably connected with a rotating barrel (22) on the outer side, and the rotating barrel (22) is threadedly connected on the outer side of the support disc (21).

2. The device for detecting tensile strength of mine anchor cable according to claim 1, characterized in that: The extrusion disc (23) is uniformly distributed with through holes (234) corresponding to the tensioning devices (3), the lower side of the through hole (234) is provided with a sliding barrel (231), the sliding barrel (231) is slidably sleeved on the outer side of the tensioning device (3), and the upper side of the extrusion disc (23) is provided with an extrusion groove (232) on the outer circumference.

3. The device for detecting tensile strength of mine anchor cable according to claim 2, characterized in that: The outer side of the rotating barrel (22) is provided with a six-sided block connected with a wrench, the inner side of the rotating barrel (22) is provided with an inner thread (222), the inner thread (222) is connected with the outer thread of the support disc (21), the upper end of the rotating barrel (22) is provided with an extrusion flange (221) on the inner side, and the extrusion flange (221) is slidably connected in the extrusion groove (232) of the extrusion disc (23).

4. The device for detecting tensile strength of mine anchor cable according to claim 3, characterized in that: The tensioning device (3) comprises a tensioning barrel (31), a plurality of vertical dovetail grooves (312) are uniformly distributed in the tensioning barrel (31), the length direction of the dovetail groove (312) and the axis of the tensioning barrel (31) are at an angle of (5) degrees, a wedge block (32) is slidably connected in the dovetail groove (312), the wedge block (32) comprises a dovetail sliding strip (321), the dovetail sliding strip (321) slides in the dovetail groove (312), the dovetail sliding strip (321) is connected with an extrusion plate (323) through a connecting block (322), and a plurality of ring grooves (324) are uniformly distributed on the inner side of the extrusion plate (323).

5. The device for detecting tensile strength of mine anchor cable according to claim 4, characterized in that: The upper end of the dovetail sliding strip (321) abuts against the extrusion disc (23), the lower side of the dovetail sliding strip (321) abuts against a circular ring (33), the lower part of the circular ring (33) abuts against a spring (34), and the lower end of the spring (34) abuts against a limiting flange (311) on the inner side of the lower end of the tensioning barrel (31).

6. The device for detecting tensile strength of mine anchor cable according to claim 5, characterized in that: The dovetail groove (312) and the dovetail sliding strip (321) are both provided with three.

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