CN218991646U

CN218991646U - Installation device of prestressed anchor rod and operation arm of anchor rod trolley

Info

Publication number: CN218991646U
Application number: CN202221384070.8U
Authority: CN
Inventors: 吴航通; 周滨; 郭陈强; 赵经理
Original assignee: Hangzhou Jingke Intelligent Equipment Manufacturing Co ltd
Current assignee: Hangzhou Jingke Intelligent Equipment Manufacturing Co ltd
Priority date: 2022-05-11
Filing date: 2022-05-31
Publication date: 2023-05-09
Anticipated expiration: 2032-05-31
Also published as: CN114856664A

Abstract

The utility model discloses a mounting device of a prestressed anchor and an operating arm of an anchor trolley, wherein the mounting device of the prestressed anchor comprises a rod body with external threads and a fastening nut sleeved on the rod body, the mounting device comprises a nut locking assembly and a rod body tensioning assembly, the nut locking assembly comprises a locking element which is used for being jointed with the fastening nut and has a rotation axis, and a first power mechanism which drives the locking element to rotate so as to lock the fastening nut, and the locking element is provided with a joint part sleeved with the fastening nut; the rod tensioning assembly comprises a tensioning element penetrating into the locking element along the rotation axis and acting on the tensioning element along the rotation axis, so that prestress is applied to the anchor rod, a connecting part connected with the rod is arranged at the head of the tensioning element, and the connecting part is provided with internal threads matched with the external threads. The anchor rod can be installed qualified step by step or once, equipment is not required to be replaced, and the operation efficiency is improved.

Description

Installation device of prestressed anchor rod and operation arm of anchor rod trolley

Technical Field

The application relates to the technical field of geotechnical engineering anchor rod support, in particular to a mounting device of a prestressed anchor rod and an operating arm of an anchor rod trolley.

Background

The anchor rod support is in a main support form of a current tunnel, wherein the anchor rod used in the technical method can generate prestress (also called anchoring force) during installation, and reasonable prestress can increase the confining pressure of surrounding rock mass, so that the stability of the tunnel rock mass is maintained. After the installation of the general anchor rod is finished, the prestress of the anchor rod needs to be tested through an anchor rod drawing meter, and whether the design requirement is met or not is observed.

The existing prestressed anchor rods are commonly divided into mechanical prestressed anchor rods (mechanical shell-expanding anchor rods or reverse wedge anchor rods), resin prestressed anchor rods and cement medicament prestressed anchor rods according to different anchoring modes or anchoring materials. The installation process of the prestress anchor rod at least comprises the operations of feeding the anchor rod, fixing the head of the anchor rod, stretching the rod body and locking the fastening nut. The whole installation process at least needs three to four devices to finish the operation. For example, the operation of fixing the head of the anchor rod requires that a drilling machine is used for rotating the rod body into and rotating the rod body; the operation of stretching the rod body requires a jack to axially stretch the rod body to generate prestress; the locking fastening nut requires a wrench or other device for rotational locking. And finally, the pluggable meter is required to be installed for verification, if the design requirement is not met, the jack is required to be installed again for tensioning operation, so that the time for installing equipment for many times is wasted correspondingly, and the equipment installation is not facilitated under the dim tunnel environment, and the operation efficiency is reduced. Therefore, it is necessary to develop a device capable of replacing the above-mentioned various devices to complete the installation of the prestressed anchor rod, thereby improving the working efficiency.

Disclosure of Invention

The application provides a mounting device of prestressing force stock can effectively improve operating efficiency.

The application provides a mounting device of prestressing force stock, the stock includes the body of rod of external screw thread, sets up in the shell type anchor head that rises of body of rod head and wears the fastening nut of cover at the body of rod afterbody, stock mounting device includes:

a nut locking assembly including a locking element for engaging the fastening nut and having an axis of rotation and a first power mechanism for driving the locking element to rotate to lock the fastening nut, the locking element having an engagement portion for engaging the fastening nut;

the rod tensioning assembly comprises a tensioning element penetrating into the locking element along the rotation axis and acting on the tensioning element along the rotation axis, so that prestress is applied to the anchor rod, a connecting part connected with the rod is arranged at the head of the tensioning element, and the connecting part is provided with an internal thread matched with the external thread.

The following provides several alternatives, but not as additional limitations to the above-described overall scheme, and only further additions or preferences, each of which may be individually combined for the above-described overall scheme, or may be combined among multiple alternatives, without technical or logical contradictions.

Optionally, the tensioning element has a combined state and a separated state relative to the first power mechanism, and in the combined state, the first power mechanism drives the tensioning element to rotate and be connected with the rod body; and when the first power mechanism stops working, the second power mechanism drives the tension element to move along the direction of the rotation axis so as to enable the tension element to enter a separation state.

Optionally, the head of the rod body is provided with a shell-expanding type anchoring head, and the shell-expanding type anchoring head is anchored with the rock stratum in the process that the first power mechanism drives the tensioning element to rotate.

Optionally, the tension element is provided with a first elastic member for urging the tension element from the separated state to the combined state.

Optionally, the first power mechanism includes the linkage element of wearing to cover outside locking element and stretch-draw element, the inner wall of linkage element has first joint portion, be provided with assorted second joint portion on the stretch-draw element.

Optionally, the tensioning element is provided with a first elastic member for driving the tensioning element to return to the combined state from the separated state, the first elastic member is a spring, and one end of the spring abuts against the second combined part.

Optionally, the linkage element is provided with a third combining part, and the corresponding locking element is provided with a matched fourth combining part.

Optionally, the first, second, third and fourth coupling portions have splines disposed along the rotation axis direction.

Optionally, the first power mechanism comprises an electric motor, and a bevel gear set is arranged between the hydraulic motor and the linkage element.

Alternatively, the first power mechanism and the second power mechanism are operated alternately during installation.

Optionally, when the resistance force received by the first power mechanism reaches a set value, the first power mechanism stops working, and when the resistance force is lower than the set value, the first power mechanism starts working.

Optionally, the second power mechanism comprises an oil cylinder sleeved on the tensioning element.

Optionally, the tensioning element is of a hollow structure and is provided with an axially-through grouting hole.

Optionally, a rotary joint connected with the grouting pipe is arranged at the tail part of the tensioning element.

Optionally, the locking element is of a two-stage structure.

Optionally, the locking element is partially in clearance fit with the tensioning element.

Optionally, the shape of the joint cavity matches the profile of the fastening nut.

Optionally, the anchor rod installation device comprises a protection tube sleeved outside the locking element and the tensioning element, and the head of the protection tube is slidably provided with an anti-collision head and a second elastic piece acting on the anti-collision head.

Optionally, the outer wall of the protection tube is provided with a first limiting step for limiting the anti-collision head to be separated, and the inner wall is provided with a second limiting step for limiting the locking element.

The application also provides an operation arm of stock platform truck, including the propulsion roof beam, slidable mounting sliding seat on the propulsion roof beam, install above-mentioned arbitrary installation device of prestressing force stock on the sliding seat.

The application also provides an anchor rod installation method using the installation device of the prestressed anchor rod, which comprises the following steps:

(1) Tensioning the rod body by utilizing a rod body tensioning assembly, and applying prestress to the anchor rod;

(2) And the nut locking component is utilized to rotate the fastening nut to lock the prestress.

Optionally, repeating the steps (1) and (2) in sequence until the prestress applied to the anchor rod reaches a set value.

Optionally, before the rod body is tensioned for the first time, the nut locking assembly is utilized to rotate the rod body, so that the expansion shell type anchoring head is expanded, and when the first power mechanism stops working, the rod body tensioning assembly is utilized to tension the rod body.

The rod tensioning assembly in the installation device of the prestressed anchor rod can drive the rod body to move along the axial direction of the rod body away from one side of the anchoring head; in addition, the nut locking component can rotate the fastening nut, so that the prestress born by the anchor rod is locked; the first power mechanism and the second power mechanism work alternately, the prestress of the anchor rod is gradually improved to the design requirement, the whole process can realize automatic operation, the installation is quick and convenient, and the operation efficiency is improved.

Drawings

FIG. 1 is a structural view of a prior art mechanical shell-expanding anchor;

FIG. 2 is a structural view of a head fixation of a mechanical shell anchor according to an embodiment of the present application;

FIG. 3 is a structural view of a pretension of a mechanical tensioning shell anchor according to an embodiment of the present application;

FIG. 4 is a structural view of a locked state of a mechanical shell-expanding anchor according to an embodiment of the present application;

FIG. 5 is a perspective view of a pre-stressed anchor installation apparatus according to one embodiment of the present application;

FIG. 6 is a view showing the construction of an initial installation bolt of the installation apparatus for a prestressed bolt according to an embodiment of the present application;

FIG. 7 is an enlarged view of portion A of FIG. 6;

FIG. 8 is an enlarged view of portion B of FIG. 6;

FIG. 9 is a structural view of a tensioning element axially displaced in a pre-stressed anchor installation apparatus according to an embodiment of the present application;

FIG. 10 is an enlarged view of portion C of FIG. 9;

FIG. 11 is an enlarged view of portion D of FIG. 9;

FIG. 12 is a structural view of the tensioning element of the installation apparatus for pre-stressed anchor of one embodiment of the present application, again with axial movement;

FIG. 13 is an assembled view of the locking element, tensioning element and linkage element of the installation apparatus for a prestressed rock bolt of an embodiment of the present application;

FIG. 14 is an assembled view of the locking element and tensioning element of the installation apparatus for a prestressed rock bolt according to one embodiment of the present application;

FIG. 15 is a perspective view of a tension element in a pre-stressed anchor installation apparatus according to one embodiment of the present application;

fig. 16 is a perspective view of a linkage element in a pre-stressed anchor installation apparatus according to an embodiment of the present application.

Reference numerals in the drawings are described as follows:

10. a locking element; 11. a first power mechanism; 12. a linkage element;

101. a fourth joint; 102. a joint; 111. a hydraulic motor; 112. a bevel gear set;

121. a first joint; 122. a third joint;

20. a tensioning element; 21. a second power mechanism; 22. a first elastic member; 23. a rotary joint;

201. a connection part; 202. a second joint; 203. a tip nut; 204. grouting holes;

211. an oil cylinder; 212. a piston;

31. a protective tube; 32. an anti-collision head; 33. a second elastic member; 34. a support sleeve;

341. a first limit step; 311. a second limit step;

40. a housing;

9. a bolt; 91. a rod body; 92. an anchor head; 93. a fastening nut; 94. a tray;

921. and (5) expanding the shell clamping piece.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In this application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number, order of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

The existing prestressed anchor rod comprises a rod body with external threads and a fastening nut which is in threaded connection with the rod body, wherein the fastening nut is used for locking and abutting against a rock wall, a tray (or a gasket) is sleeved on the rod body nowadays in order to improve the contact area and the connection stability, the fastening nut abuts against the tray, and the tray abuts against the rock wall to complete locking operation.

The different prestress anchor rods have slightly different partial structures or installation modes. For example, a resin prestressed anchor rod is plugged with a resin reagent pack in an anchor hole, after the anchor rod is fed into the anchor hole, the rod body rotates at a high speed and stretches into the reagent pack, the internal reagents are mixed to react after the reagent pack is broken, the resin prestressed anchor rod is quickly solidified, the head is fixed, and then the operations of tensioning the rod body, locking and checking are performed. The cement cartridge prestressed anchor rod is characterized in that a quick-hardening cement cartridge is used as an anchoring agent to be plugged into an anchor hole, the head is fixed through the bonding of hardened cement to a rock body and a rod body, and then the operations of tensioning the rod body, locking and checking are performed.

The mechanical prestress anchor rod is mainly divided into a mechanical shell-expanding anchor rod and an inverted wedge-shaped anchor rod, wherein after the inverted wedge-shaped anchor rod is directly or rotationally conveyed into an anchor hole, barbs on the anchor rod can be embedded into a rock mass in the process of stretching the anchor rod, prestress is generated, and then locking and checking operations are performed.

For convenience of explanation, the present application mainly uses a mechanical expansion shell anchor rod as an example, and the anchor rods mentioned below refer to the mechanical expansion shell anchor rods unless they are specifically explained. As shown in fig. 1, the anchor rod 9 mounted by the prestress anchor rod mounting device of the present application comprises a rod body 91 with external threads, an anchor head 92 arranged at the head of the rod body, and a fastening nut 93 sleeved at the tail of the rod body. Wherein the head part is positioned at one side in the rock mass, and the tail part is exposed at one side outside the rock mass. The anchor head 92 is movably provided with a shell expansion clamping piece 921, the anchor head 92 is in threaded connection with the rod body 91, the fastening nut 93 is in threaded connection with the rod body 91, a tray 94 is arranged between the fastening nut 93 and the anchor head 92, and the tray 94 is used for abutting against a rock wall.

Referring to fig. 2 to 11, the installation device of the prestressed anchor rod is slidably installed on an operation arm of a track or an anchor rod trolley, and can be abutted with the anchor rod and axially moved along the rod body, so as to send the anchor rod into an anchor hole or retract to be separated from the anchor rod.

The installation device of the prestressed anchor includes a nut locking assembly and a rod tensioning assembly, wherein the nut locking assembly includes a locking member 10 for engaging a fastening nut 93 and having a rotation axis, and a first power mechanism 11 for driving the locking member 10 to rotate to lock the fastening nut 93. The locking element 10 is a cylinder with an axis of rotation that is the same as the axis of the rod. The head of the locking element 10 has a joint portion for sleeving the fastening nut 93, and the two are rotated synchronously around the rotation axis for completing the locking operation. The first power mechanism 11 generally includes a motor responsible for power take-off and a transmission structure connecting the motor with the locking element 10.

The rod tensioning assembly comprises a tensioning element 20 penetrating into the locking element 10 along the rotation axis for connecting the rod 91 and a second power mechanism 21 acting on the tensioning element 20 along the rotation axis for applying a prestressing force to the anchor rod 9. The tensioning element 20 is substantially shaped as a cylinder, and the corresponding locking element 10 is hollow, so that the tensioning element 20 can partially extend into the locking element 10 to be combined with the rod 91. The head of the tensioning element 20 can be connected with the tail of the rod body 91, and in the connected state, the two have a relatively fixed state in the axial direction, and in the fixed state, the two can synchronously move along the rotation axis direction for completing the operation of tensioning the rod body, so that the shell-expanding clamping piece moves outwards to generate prestress. The force generated by the second power mechanism 21 is in the direction of the rotational axis.

The head of the tension element 20 is provided with a connecting portion 201 connected with the rod body, and the tail of the rod body 91 is provided with external threads, so that the connecting portion 201 has internal threads matched with the external threads. Tension element 20 has two processes of abutting and engaging with rod body 91, abutting finger connecting portion 201 contacts with rod body 91, and engaging finger is a process of mutually screw-fitting after abutting operation. Wherein the fastening nut 93 is spaced from the tail of the rod 91 such that the engagement portion can be engaged with the fastening nut 93 during engagement. The engagement process requires rotation of tensioning element 20, and the source of rotation may be from a first power mechanism.

The concrete anchor rod installation process is divided into two types:

scheme a:

the drilling machine punches to form an anchor hole, and the anchor rod 9 is fed into the anchor hole through the device of the embodiment;

and (2) abutting the connecting part of the tensioning element with the rod body 91, starting the first power mechanism to start to mesh, and moving the rod body 91 along the axis of the rotating shaft in the meshing process, wherein the shell expansion clamping piece of the anchoring head continuously moves outwards to tightly lean against the rock stratum, and the prestress acting on the anchor rod continuously rises. In this process, the fastening nut 93 is engaged with the engaging portion 102 and rotates synchronously with the rod 91;

step (3), when the prestress reaches a certain set value, the first power mechanism is stopped, the second power mechanism 21 is started, the rod body 91 is stretched along the rotation axis direction, and the shell expansion clamping piece of the anchoring head is further moved outwards to continuously improve the prestress;

and (4) stopping the second power mechanism 21, starting the first power mechanism 11, driving the locking element to rotate the fastening nut 93 to move relative to the rod body 91 until the fastening nut abuts against the rock wall, completing the locking operation, and locking the prestress.

And (5) repeating the step (3) and the step (4), and gradually lifting the prestress until the tensioning element cannot tension the rod body 91 (namely, the second power mechanism cannot be started), so that the prestress meets the design requirement. In the step (3), the fastening nut 93 moves out with the rod 91 and forms a gap with the rock wall, so that the locking operation of the step (4) is required.

The two power mechanisms are alternately operated to be automatically switched, when the resistance force received by the first power mechanism reaches a set value, the operation is stopped, and when the resistance force is lower than the set value, the operation is started. The first power mechanism is a hydraulic motor, the second power mechanism is an oil cylinder, a pressure limiting oil valve is arranged between the first power mechanism and the second power mechanism, the pressure limiting oil valve is provided with an upper limit value and a lower limit value, when the first power mechanism works, the pressure limiting oil valve is switched to work after the pressure of the pressure limiting oil valve rises and reaches the upper limit value, and meanwhile, the pressure limiting oil valve is switched to work after the pressure of the pressure limiting oil valve falls and reaches the lower limit value. And repeating the steps until the second power mechanism cannot be started and the oil pressure of the oil limiting valve reaches the upper limit value.

Scheme B:

and (2) abutting the connecting part of the tensioning element with the rod body 91, starting the first power mechanism to start to mesh, and moving the rod body 91 along the axis of the rotating shaft in the meshing process, wherein the shell expansion clamping piece of the anchoring head continuously moves outwards to tightly lean against the rock stratum, and the prestress acting on the anchor rod continuously rises.

Step (3), when the prestress reaches a certain set value, stopping the first power mechanism, starting the second power mechanism 21, stretching the rod body 91 along the rotation axis direction, and further outwards moving the shell expansion clamping piece of the anchoring head to improve the prestress, wherein the stretching process is continued until the rod body 91 cannot be stretched, and the prestress is regarded as reaching the design requirement;

and (4) stopping the second power mechanism 21, starting the first power mechanism 11, driving the nut locking assembly to rotate the fastening nut 93 to move relative to the rod body 91 until the fastening nut abuts against the rock wall, completing locking operation, and locking prestress.

The scheme A and the scheme B are different in whether the step (3) is Zhang Ladao bits or not, and the scheme A realizes automatic switching of the scheme A and the scheme B through a pressure limiting oil valve so as to achieve the purpose of gradually lifting prestress, so that the scheme A is safer and more stable. Scheme B has higher efficiency and shortens bolt installation time compared to scheme a.

In one embodiment, tension element 20 has an engaged state and a disengaged state relative to first power mechanism 11. The combination state is that when the tensioning elements 20 are initially abutted against the rod bodies 91, the corresponding tensioning elements 20 do not move along the rotation axis, and at the moment, the first power mechanism can drive the tensioning elements 20 to rotate to complete the meshing operation;

after the second power mechanism is started, the tensioning element 20 is enabled to move along the rotation axis, and the first power mechanism cannot drive the tensioning element 20 to rotate, so that the tensioning element 20 is in a separated state. The switching between the two states can be achieved by interlocking the tensioning element 20 and the partial components of the first power means 11. In the coupled state, the first power mechanism 11 is activated and drives the locking element 11 and the tension element 20 to rotate synchronously. Other power mechanisms are omitted, the servicing weight is reduced, and particularly the load on the operating arm is reduced.

In one embodiment, the tensioning element 20 is provided with a first elastic member 22 for driving the tensioning element 20 from the separated state to the combined state, the first elastic member 22 also acts on the housing 40, and the two power mechanisms and the locking element are fixedly mounted on the housing 40. After the locking is completed, the power output part of the second power mechanism 21 is reset, and the reset is understood as that the tensioning element releases the tensioning of the rod 91. Since the tension element 20 is threadedly engaged with the rod 91 to be relatively fixed, the housing 40 is moved along the axis of the rotation shaft by the first elastic member 22 to disengage the lock element 10 from the lock nut 93, and the tension element 20 is brought back into the engaged state, and the first power mechanism 11 is started to drive the tension element 20 to rotate reversely to disengage from the rod 91 and prepare for a new installation. The first power mechanism 11 is a hydraulic motor and can rotate in the forward and reverse directions.

In one embodiment, the first power mechanism 11 includes a linkage member 12 that is threaded over the locking member 10 and the tensioning member 20. The linkage element 12 is a hollow column, the axis of which is the same as the rotation axis, and the linkage element 12 rotates around the rotation axis when the first power mechanism 11 operates. The inner wall of linkage element 12 has a first coupling portion 121 and tensioning element 20 is provided with a mating second coupling portion 202. The specific first coupling portion 121 and the second coupling portion 202 may be positioning protrusions extending along the rotation axis and disposed on one of them, and positioning grooves disposed on the other, which cooperate with each other to achieve circumferential fixation of the linkage element 12 and the tension element 20, so that the tension element 20 can rotate synchronously with the linkage element 12 in a coupled state. When the tension element 20 moves axially, the first and second coupling portions can be separated from each other, so that the tension element 20 is brought into a separated state.

In one embodiment, the tensioning element 20 is provided with a first elastic member 22 for urging the tensioning element 20 from the separated state to the combined state, the first elastic member 22 is a spring, and one end of the spring abuts against the end of the second combining portion 202, and the other end abuts against the housing 40, so that the spring can be compressed. After the final locking is completed, the second power mechanism is reset, the first power mechanism 11 is started, and the linkage element 12 runs at a low rotation speed until the second joint part 202 can be matched with the first joint part 121 again, so that the tensioning element 20 enters the joint state again.

In one embodiment, the linkage element 12 is provided with a third coupling portion 122, and the corresponding locking element 10 is provided with a fourth coupling portion 101 matching the third coupling portion 122. The two combining parts can be a positioning protruding block extending along the axis and a positioning groove matched with the positioning protruding block, and the two combining parts realize circumferential fixation between the locking element 10 and the linkage element 12, so that the locking element 10 can synchronously rotate with the linkage element 12, and the fastening nut 93 synchronously rotates with the rod body 91 when the first pre-tightening is performed, and the relative positions of the two are fixed.

In one embodiment, the first coupling portion 121, the second coupling portion 202, the third coupling portion 122 and the fourth coupling portion 101 have splines disposed along the rotation axis direction, wherein the first coupling portion 121 and the third coupling portion 122 may be different types of splines (including different sizes or different numbers). In a preferred embodiment, the first joint part 121 and the third joint part 122 may be the same spline extending along the axis of the rotating shaft, and the second joint part 202 and the fourth joint part 101 are corresponding splines matched with the same spline, so that the processing is convenient. In the combined state, the combined parts are correspondingly matched with each other, in the separated state, the tensioning element 20 moves along the axial direction to separate the second combined part 202 from the first combined part 121, and the tensioning element 20 cannot move towards the head axial direction due to the acting force of the second power mechanism 21, so that the tensioning element 20 is always in the separated state, the operation from the step (2) to the step (4) is convenient, the second power mechanism 21 is reset, the linkage element 12 runs at a low rotating speed, the first combined part and the second combined part are matched again, and the tensioning element 20 enters the combined state.

Referring to fig. 6 to 12, in one embodiment, the second power mechanism 21 includes an oil cylinder 211 that is sleeved on the tensioning element 20. The end of the tensioning element 20 far away from the anchor rod 9 is fixedly provided with a head nut 203 in a threaded manner, an oil cylinder 211 is sleeved outside the end of the tensioning element 20 and comprises a piston 212 acting on the head nut 203, specifically, the piston 212 acts to push the head nut 203, so that the tensioning element 20 is driven to move along the rotation axis, and the stroke of the piston 212 increases until the head nut 203 cannot be pushed after each action. The piston is reset and waits for the subsequent separation operation with the rod body.

In one embodiment, the tensioning element 20 is of a hollow structure, and has an axially penetrating grouting hole 204, the corresponding rod 91 is of a hollow structure, in the first step, the tail of the rod 91 is attached to the end of the grouting hole 204, sealing is completed, and after final locking, grouting operation can be performed through the hollow tensioning element 20.

In one embodiment, the tail of the tension element 20 is provided with a swivel joint 23 for connecting a grouting pipe (not shown) which will not twist when the tension element 20 is rotated.

Referring to fig. 13 and 14, in one embodiment, the locking element 10 has a two-stage structure, two ends of the locking element 10 can be relatively fixed by welding or threaded connection, the front section of the locking element 10 is used for being matched with the fastening nut 93, the rear section of the locking element 10 is matched with the linkage element 12, the whole length is too long, the locking element is divided into two sections for processing and assembling, and the locking element is manufactured by different processing modes according to different purposes, so that the locking element is convenient to manufacture, and the front section is required to be matched with the fastening nut 93 frequently, so that the wear resistance and hardness of the front section can be improved, and the wear consumption can be reduced.

In one embodiment, part of the locking element 10 is in clearance fit with the tensioning element 20, so that support of one end of the tensioning element 20 adjacent to the anchor rod 9 is provided, and a self-lubricating spacer bush is arranged at the other end of the tensioning element 20, and two-point support is provided, so that rotation stability is improved.

Referring to fig. 7 and 10, in one embodiment, the locking element 10 has an engagement portion 102 sleeved with the fastening nut 93, and the shape of the inner cavity of the engagement portion 102 matches the profile of the fastening nut 93. Specifically, the engaging portion 102 is a locking groove, and the cross-sectional shape of the locking groove is polygonal, preferably at least 12 sides, and the corresponding fastening nut 93 is matched with the locking groove, so that the locking element 10 is more convenient to match the fastening nut 93 compared with a hexagon according to a hexagonal nut. And the coupling portion 102 extends along the rotation axis so that the rod body 91 allows the fastening nut 93 to slide synchronously during the movement.

In one embodiment, the anchor rod installation device comprises a protection tube 31 sleeved outside the locking element 10 and the tensioning element 20, and the protection tube 31 is in clearance fit with the locking element 10, so that the rotation stability of the locking element 10 is improved. The head of the protection tube 31 is slidably mounted with the impact head 32 and the second elastic member 33 acting on the impact head 32. The anti-collision head 32 is in a horn mouth form, and is used for being matched with the tensioning element 20 and the locking element 10 when the anchor rod 9 is installed for the first time, so that the anti-collision head 32 can be abutted against a rock wall or a tray 94, and the end part of the locking element 10 is prevented from being damaged due to collision. The second elastic member 33 is a spring, and plays a role in buffering the impact head 32.

In one embodiment, the outer wall of the protection tube 31, which is close to the anchor rod 9, is connected with a supporting sleeve 34 in a threaded manner, and the supporting sleeve 34 is provided with a first limit step 341 for limiting the detachment of the anti-collision head 32, so as to prevent the detachment of the anti-collision head 32. The inner wall of the protection tube 31 is provided with a second limiting step 311 limiting the locking element 10, preventing the locking element 10 from being removed. And the first limiting step 341 and the second limiting step 311 are provided with inclined planes which are bell-mouthed and mutually adapt to the bell mouth of the anti-collision head 32.

The combination and the separation of the tensioning element and the locking element of the installation device of the prestress anchor rod skillfully omits a power mechanism, and in the meshing operation, the matching of the fastening nuts is completed in a proper way; the tension element and the locking element are separated when the prestress is tensioned and lifted, and conditions are provided for subsequent locking operation. The rings are buckled, so that the installation efficiency is improved.

The tensioning element and the locking element are in a combined state and a separated state, and are matched with the alternate work of the first power mechanism and the second power mechanism to gradually lift the prestress of the anchor rod to the design requirement, so that the whole process can realize automatic operation, and the automatic tensioning device is safe, stable, rapid and convenient to install. And this device can accomplish and send pole and the fixed operation of head, has replaced sending pole and jack, avoids changing equipment, has improved the operating efficiency.

The application also provides an operation arm of stock platform truck, including the propelling movement roof beam, slidable mounting sliding seat on the propelling movement roof beam, install the installation device of the prestressing force stock of above-mentioned embodiment on the sliding seat, rely on the operation arm to carry out high-order operation, further improved the operating efficiency.

In the preferred embodiment, the operating arm of stock platform truck still includes the rock drill that can bore, and rock drill slidable mounting is on the push beam, realizes boring, carries the stock, installs the operation of stock and slip casting, further improves the operating efficiency.

(1) Stretching the rod body by utilizing a rod body stretching assembly, and applying prestress to the anchor rod;

And (3) repeating the step (1) and the step (2) until the prestress applied to the anchor rod reaches a set value. Step (1) and step (2) correspond to step (3) and step (4) in scheme a, respectively.

Before the rod body is stretched for the first time, the nut locking assembly is utilized to rotate the rod body, so that the stretching element is connected with the rod body, and after the first power mechanism stops working, the rod body stretching assembly is utilized to stretch the rod body.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description. When technical features of different embodiments are embodied in the same drawing, the drawing can be regarded as a combination of the embodiments concerned also being disclosed at the same time.

The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not thereby to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application.

Claims

1. The installation device of prestressing force stock, the stock includes the body of rod of external screw thread and wears the fastening nut of cover on the body of rod, its characterized in that, installation device of prestressing force stock includes:

the rod tensioning assembly comprises a tensioning element penetrating into the locking element along the rotation axis and a second power mechanism acting on the tensioning element along the rotation axis to apply prestress to the anchor rod, wherein the head of the tensioning element is provided with a connecting part connected with the rod, and the connecting part is provided with an internal thread matched with the external thread.

2. The apparatus for installing a prestressed rock bolt according to claim 1, wherein said tension element has a coupled state and a decoupled state with respect to said first power mechanism, and in the coupled state, said first power mechanism drives said tension element to rotate to be coupled with the rod body; and when the first power mechanism stops working, the second power mechanism drives the tension element to move along the direction of the rotation axis so as to enable the tension element to enter a separation state.

3. A pre-stressed anchor installation device according to claim 2, wherein the tensioning element is provided with a first resilient member urging the tensioning element from the disengaged condition to the engaged condition.

4. A pre-stressed anchor installation device according to claim 2, wherein the first power mechanism comprises a linkage element sleeved outside the locking element and the tensioning element, the inner wall of the linkage element is provided with a first combination part, and the tensioning element is provided with a matched second combination part.

5. The apparatus according to claim 4, wherein the tension element is provided with a first elastic member for urging the tension element from the separated state to the coupled state, the first elastic member being a spring, and one end of the spring being abutted against the second coupling portion.

6. A pre-stressed anchor installation device as claimed in claim 4, wherein the linkage element is provided with a third engagement portion and the corresponding locking element is provided with a matching fourth engagement portion.

7. The installing device of a prestressed rock bolt according to claim 6, wherein the first, second, third and fourth coupling portions have splines provided in a rotation axis direction.

8. A pre-stressed anchor installation device according to claim 1 or claim 2, wherein the first and second power mechanisms operate alternately during installation.

9. A pre-stressed anchor installation device according to claim 8, wherein the first power mechanism is stopped when the resistance to the first power mechanism reaches a set value and is started when the resistance to the first power mechanism is lower than the set value.

10. The device for installing the prestressed anchor according to claim 1, wherein said tension element has a hollow structure with a grouting hole penetrating axially, and a rotary joint connected with a grouting pipe is provided at the tail of said tension element.

11. A pre-stressed anchor installation device as claimed in claim 1, wherein the locking element is partially in clearance fit with the tensioning element.

12. A pre-stressed anchor bolt installation device as claimed in claim 1, wherein the shape of the interface cavity matches the profile of the fastening nut.

13. An operating arm of an anchor rod trolley, comprising a propelling beam, wherein a sliding seat is slidably arranged on the propelling beam, and the installation device of the prestressed anchor rod is arranged on the sliding seat.