CN115807683A - Anchor bolt supporting device and construction method - Google Patents

Abstract

The invention discloses an anchor bolt supporting device and a construction method, the anchor bolt supporting device comprises a base, a drilling component, a grouting component and a pumping component, wherein the drilling component is connected to the base, the drilling component comprises a rotating shaft and a driving part, the rotating shaft is provided with a through hole, the driving part is in transmission connection with the rotating shaft, the grouting component is slidably connected to the base, the grouting component comprises an anchor grouting part and a sleeve, the anchor grouting part is provided with a water flow channel and a plurality of fluid channels which are not communicated with each other, the water flow channel and the fluid channels are both communicated with the through hole, the sleeve is rotatably connected to the anchor grouting part, the sleeve is in spiral transmission with the rotating shaft, the pumping component comprises a pump body, a first grouting cylinder and a second grouting cylinder, the first grouting cylinder is communicated with one part of the fluid channels, and the second grouting cylinder is communicated with the other part of the fluid channels. The anchor rod supporting device is simple in structure and small in size, and the fluid channel of the grouting assembly is static relative to the environment during drilling, so that the anchor rod supporting device is suitable for conveying fluid materials which are easy to react and easy to volatilize and dissipate.

Description

Anchor bolt supporting device and construction method

Technical Field

The invention belongs to the technical field of roadway support, and particularly relates to an anchor rod support device and a construction method.

Background

The double-anchoring-agent anchor-grouting anchor bolt supporting technology as a novel anchor bolt supporting technology can obtain very remarkable effect when treating weak and broken rock masses. In the related technology, a pneumatic grouting pump is generally used for anchor grouting of anchor rod drilling, and the pneumatic grouting pump mainly drives a piston by a cylinder to realize slurry suction and discharge actions. However, when the pressure of underground compressed air is insufficient, the anchoring pressure is severely limited, and the pneumatic grouting pump has a complex transmission structure, a bulky body, large flow and pressure pulsation and high price.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the anchor bolt supporting device is high in integration, simple in structure and small in size, and a fluid channel of a grouting assembly is static relative to the environment during drilling, so that the anchor bolt supporting device is suitable for conveying fluid materials which are easy to react and easy to volatilize and dissipate.

The embodiment of the second aspect of the invention also provides a construction method.

The anchor rod supporting device comprises a base, a drilling component, a grouting component and a pumping component, wherein the drilling component is connected to the base, the drilling component comprises a rotating shaft and a driving piece, the rotating shaft is provided with a through hole, the axis of the through hole is arranged along the axial direction of the rotating shaft, the driving piece is in transmission connection with the rotating shaft, the grouting component can be connected to the base in a sliding mode, the grouting component comprises an anchor grouting piece and a sleeve, the anchor grouting piece is provided with a water flow channel and a plurality of fluid channels which are not connected with each other, the water flow channel and the fluid channels are communicated with the through hole, the sleeve is in rotatable connection with the anchor grouting piece, at least part of the sleeve is located in the through hole and is in spiral transmission with the rotating shaft, one part of the anchor grouting piece is located in the through hole, the pumping component comprises a pump body, a first grouting cylinder and a second grouting cylinder, the first grouting cylinder and the second grouting cylinder are connected to the pump body, the first grouting cylinder is communicated with one part of the fluid channels, and the second grouting cylinder is communicated with the other part of the fluid channels.

According to the anchor bolt supporting assembly provided by the embodiment of the invention, the driving piece of the drilling assembly is used for driving the rotating shaft to rotate forwards and backwards so as to realize construction operation of drilling and pre-tightening the anchor bolt. The grouting assembly conveys various fluids into the anchor rod through the fluid channels, so that the anchor rod or the drill rod is protected, and grouting is completed. Through pivot and sleeve screw drive, realized that anchor notes piece is close to or keeps away from the stock, anchor notes piece is close to the stock in order to reduce the fluid seepage when making the stock slip casting, and anchor notes piece keeps away from the stock and prevents to take place to interfere when stock pretension. The pumping subassembly can pump two kinds of anchoring agent simultaneously through first slip casting jar and second slip casting jar, and first slip casting jar and second slip casting jar are integrated on the pump body, have avoided occupying a large amount of spaces because of using a plurality of grouting pumps.

In some embodiments, the through-hole includes first section and the second section that links to each other along its length direction, the one end that the second section was kept away from to the first section is equipped with the polygon interface to the matching with the stock, the internal diameter of first section is less than the internal diameter of second section, be equipped with the internal thread in the second section, be equipped with the external screw thread on the telescopic periphery wall, the sleeve with threaded connection is passed through to the pivot, the internal thread's in the second section nominal dimension is D, the internal diameter of second section is D, the internal thread's in the second section nominal dimension D with the internal diameter D of second section should satisfy D > D.

In some embodiments, the first grouting cylinder comprises a first plunger cavity, a first inlet pipe, a first outlet pipe and a first plunger, the first inlet pipe and the first outlet pipe are both communicated with the bottom of the first plunger cavity, and at least part of the first plunger is positioned in the first plunger cavity and is slidable in the up-and-down direction, so that the anchoring agent enters the bottom of the first plunger cavity from the first inlet pipe and is discharged from the first outlet pipe;

the second grouting cylinder comprises a second plunger cavity, a second inlet pipe, a second outlet pipe and a second plunger, the second inlet pipe and the second outlet pipe are both communicated with the bottom of the second plunger cavity, and at least part of the second plunger is positioned in the second plunger cavity and is slidable in the vertical direction, so that the anchoring agent enters the bottom of the second plunger cavity from the second inlet pipe and is discharged from the second outlet pipe;

the pumping assembly further comprises a connecting piece and a piston cylinder, the connecting piece is connected to the upper portion of the pump body, the connecting piece is respectively connected with the first plunger and the second plunger, the piston cylinder comprises a piston cavity and a piston rod, the piston rod is connected with the connecting piece, at least part of the piston rod is located in the piston cavity, the piston rod can move up and down in the piston cavity under the driving of hydraulic oil in the piston cavity, so that the connecting piece is driven to move up and down, and the first plunger and the second plunger are driven to move up and down.

In some embodiments, the pumping assembly further comprises a hydraulic tank connected to the pump body, one oil line of the hydraulic tank communicating with the upper end of the piston chamber and another oil line of the hydraulic tank communicating with the lower end of the piston chamber.

In some embodiments, the connecting member includes a first connecting hole, a second connecting hole, and a third connecting hole, the upper end of the piston rod extends into the first connecting hole to connect with the connecting member, the length of the piston rod extending into the first connecting hole is adjustable, the upper end of the first plunger extends into the second connecting hole to connect with the connecting member, and the upper end of the second plunger extends into the third connecting hole to connect with the connecting member.

In some embodiments, the piston rod is threadedly coupled to the first coupling hole so as to adjust a length of the piston rod extending into the first coupling hole;

the pumping assembly further comprises:

the first nut is positioned above the connecting piece and abuts against the upper surface of the connecting piece, the first plunger penetrates through the second connecting hole, the upper end of the first plunger is in threaded connection with the first nut, the first plunger is provided with a first limiting part, and the first limiting part is positioned below the connecting piece and abuts against the lower surface of the connecting piece so as to limit the length of the first plunger extending into the second connecting hole;

the second nut, the second nut is located connecting piece top and end the upper surface of connecting piece, the second plunger runs through the third connecting hole, just the upper end and the second nut threaded connection of second plunger, the second plunger is equipped with the spacing portion of second, the spacing portion of second is located the below of connecting piece and end the lower surface of connecting piece, so that prescribe a limit to the second plunger stretches into the length of third connecting hole.

In some embodiments, the pumping device further comprises:

the first sealing sleeve is positioned in the piston cavity and positioned at the upper part of the piston cavity so as to seal off the upper part of the piston cavity;

the second sealing sleeve is positioned in the first plunger cavity and positioned at the upper part of the first plunger cavity so as to seal off the upper part of the first plunger cavity;

a third sealing gland located within the second plunger chamber and above the second plunger chamber so as to seal off the upper part of the second plunger chamber;

and the cover plate is arranged at the upper end of the pump body and is connected with the pump body so as to limit the first sealing sleeve, the second sealing sleeve and the third sealing sleeve.

In some embodiments, the piston cavity is located between the first plunger cavity and the second plunger cavity in the left-right direction, and the first plunger cavity and the second plunger cavity are left-right symmetric about a centerline of the piston cavity.

In some embodiments, the first inlet pipe and the first outlet pipe are disposed opposite to each other in a left-right direction, and the second inlet pipe and the second outlet pipe are disposed opposite to each other in the left-right direction.

The embodiment of the second aspect of the invention also provides a construction method, which comprises the following steps:

providing a bolting device according to any one of the above embodiments, connecting a bolt to an end of the shaft remote from the anchor member and communicating the bolt with the through hole;

controlling the water injection pump to inject water into the anchor rod through the water flow passage and the through hole;

controlling the driving piece to drive the rotating shaft to rotate forward so as to drive the anchor rod to drill in a forward rotation manner;

after drilling is finished, controlling the driving piece to stop, and then controlling the water injection pump to stop injecting water into the anchor rod;

controlling the first grouting cylinder and the second grouting cylinder to pump anchoring agent into the anchor rod in a set proportion through the fluid channel and the through hole;

after grouting is finished, the driving piece is controlled to drive the rotating shaft to rotate reversely, and the rotating shaft drives the pre-tightening nut on the anchor rod to rotate reversely, so that pre-tightening of the anchor rod is realized.

According to the construction method provided by the embodiment of the invention, by adopting the anchor bolt supporting device provided by the embodiment, drilling, grouting and pre-tightening processes can be automatically carried out, the automation degree is high, the anchor bolt supporting operation efficiency is improved, and the labor intensity of constructors is reduced.

Drawings

Figure 1 is a schematic view of a drilling assembly and a grouting assembly of a rock bolting apparatus according to an embodiment of the invention.

Figure 2 is a rear view of the drilling and grouting assemblies of the bolting apparatus according to an embodiment of the invention.

Figure 3 is a top plan view of the drilling and grouting assemblies of the bolting apparatus according to an embodiment of the invention.

Figure 4 is a top cross-sectional view of the drilling and grouting assemblies of the bolting apparatus according to an embodiment of the invention.

Figure 5 is a front cross-sectional view of a pumping assembly of a bolting apparatus according to an embodiment of the invention.

Figure 6 is a left side sectional view of a pumping assembly of a bolting device according to an embodiment of the invention.

Figure 7 is a top view of a pumping assembly of a bolting device according to an embodiment of the invention.

Reference numerals:

a base 1;

a drilling assembly 2; a rotating shaft 21; a through hole 211; a drive member 22;

a grouting assembly 3; an anchor 31; a water flow passage 311; a fluid channel 312; a sleeve 32;

a pumping assembly 4; a pump body 41;

the first grouting cylinder 42; a first plunger chamber 421; a first inlet pipe 422; first outlet pipe 423; a first plunger 424;

a second grouting cylinder 43; a second plunger chamber 431; a second inlet pipe 432; a second outlet tube 433; a second plunger 434;

a connector 44; a first connection hole 441; the second connection hole 442; the second connection hole 443; a piston cylinder 45; a piston chamber 451; a piston rod 452;

a hydraulic tank 46;

a first nut 471; a second nut 472;

a first gland 481; a second sealing boot 482; a third sealing sleeve 483; and a cover plate 484.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A bolting device according to an embodiment of the invention is described below with reference to the accompanying drawings.

As shown in fig. 1 to 7, the bolting apparatus according to the embodiment of the present invention comprises a base 1, a drilling assembly 2, a grouting assembly 3 and a pumping assembly 4.

The drilling assembly 2 is connected to the base 1, the drilling assembly comprises a rotating shaft 21 and a driving part 22, a through hole 211 is formed in the rotating shaft 21, the axis of the through hole is arranged along the axial direction of the rotating shaft 21, and the driving part 22 is in transmission connection with the rotating shaft 21. It will be appreciated that the first shaft 21 is adapted to be connected to a hollow rock bolt or drill rod (not shown) for use in construction to perform a drilling operation. For example, as shown in fig. 1 and 4, the hollow anchor may be inserted into the through hole 211 from the rear side of the rotating shaft 21 to complete the positioning of the hollow anchor. The drive member 22 drives the shaft 21 in forward and reverse rotation to complete the bolt hole and pretension, it being understood that the direction of rotation is opposite to that of the bolt hole when the pretension is completed. For example, if the rotating shaft 21 rotates forward to drive the anchor rod to perform a drilling operation, after the anchor rod is drilled, the rotating shaft 21 rotates backward to drive the anchor rod to perform a pre-tightening operation.

The grouting component 3 is slidably connected to the base 1, the grouting component 3 comprises an anchoring part 31 and a sleeve 32, the anchoring part 31 is provided with a water flow passage 311 and a plurality of fluid passages 312 which are not communicated with each other, the water flow passage 311 and the fluid passages 312 are both communicated with the through hole 211, the sleeve 32 is rotatably connected to the anchoring part 31, at least part of the sleeve 32 is positioned in the through hole 211 and is in screw transmission with the rotating shaft 21, and part of the anchoring part 31 is positioned in the through hole 211. It is understood that the water flow path 311 and the plurality of fluid paths 312 are in communication with a media source, such that the water flow path 311 and the plurality of fluid paths 312 may provide media according to the requirements of the actual operating conditions. For example, during drilling, the water flow path 311 delivers water into the bolt to clear away the coal slag produced during drilling, during bolting, the water supply is shut off, and the fluid passage 312 supplies an anchoring agent into the bolt to anchor the bolt and surrounding rock together.

The pumping assembly 4 includes a pump body 41, a first grouting cylinder 42 and a second grouting cylinder 43, the first grouting cylinder 42 and the second grouting cylinder 43 are both connected in the pump body 41, the first grouting cylinder 42 is communicated with a part of the fluid passage 312, and the second grouting cylinder 43 is communicated with another part of the fluid passage 312. It can be understood that the first grouting cylinder 42 delivers the anchoring agent a into the fluid passage 312, the second grouting cylinder 43 delivers the anchoring agent B into the fluid passage 312, the anchoring agent a and the anchoring agent B are not mixed in the pumping assembly 4 and the grouting assembly 3, and the anchoring agent a and the anchoring agent B are mixed and react after entering the anchor rod, so that the blocking of the pumping assembly 4 and the grouting assembly 3 caused by the mixing reaction of the anchoring agent a and the anchoring agent B in the pumping assembly 4 or the grouting assembly 3 is avoided while the anchoring effect is ensured.

In the anchor bolt support assembly of the embodiment of the invention, the driving piece 22 of the drilling assembly 2 rotates forwards and backwards through the driving rotating shaft 21 so as to realize the construction operation of drilling and pre-tightening the anchor bolt. The grouting assembly 3 delivers various fluids into the rock bolt through the plurality of fluid passages 312, thereby protecting the rock bolt or the drill rod and completing grouting. Through pivot 21 and sleeve 32 helical drive, realized that anchor notes piece 31 is close to or keeps away from the stock, anchor notes piece 31 is close to the stock in order to reduce the fluid seepage when making the stock slip casting, and anchor notes piece 31 is kept away from the stock and is prevented to take place to interfere when the stock pretension. The pumping assembly 4 can pump two kinds of anchoring agents simultaneously through the first grouting cylinder 42 and the second grouting cylinder 43, and the first grouting cylinder 42 and the second grouting cylinder 43 are integrated on the pump body 41, so that the occupation of a large amount of space due to the use of a plurality of grouting pumps is avoided.

Optionally, the driving member 22 includes a hydraulic motor, a driving gear and a driven gear, the hydraulic motor is connected to the base 1, the driving gear is sleeved on an output shaft of the hydraulic motor, the driven gear is sleeved on the rotating shaft and meshed with the driving gear, and the hydraulic motor rotates to drive the rotating shaft 21 to rotate by driving the driven gear to rotate with the driving gear. It will be appreciated that when the hydraulic motor rotates forwardly, the hydraulic motor drives the shaft 2 to rotate reversely through the driving gear and the driven gear, and when the hydraulic motor rotates reversely, the hydraulic motor drives the shaft 21 to rotate forwardly through the driving gear and the driven gear.

As shown in fig. 4, in some embodiments, the through hole 211 includes a first section and a second section connected along a length direction thereof, an end of the first section far from the second section is provided with a polygonal interface matched with the anchor rod, an inner diameter of the first section is smaller than an inner diameter of the second section, an inner thread is provided in the second section, an outer thread is provided on an outer circumferential wall of the sleeve 32, the sleeve 32 is in threaded connection with the rotating shaft 21, a nominal size of the inner thread in the second section is D, an inner diameter of the second section is D, and the nominal size D of the inner thread in the second section and the inner diameter D of the second section should satisfy D > D.

It can be understood that when the rotation shaft 21 rotates to drive the anchor rod to drill a hole (i.e. when the rotation direction of the rotation shaft 21 is the rotation direction during drilling), and the internal thread is not completely engaged with the external thread, the rotation shaft 21 drives the second sleeve 3 to translate relative to the base 1 in the direction close to the anchor rod (as shown in fig. 4, the sleeve 32 translates backward relative to the base 1), and after the internal thread is completely engaged with the external thread, the sleeve 32 rotates synchronously with the rotation shaft 21. When the rotating shaft 21 rotates to drive the nut on the anchor rod to pre-tighten (that is, when the rotating direction of the rotating shaft 21 is the rotating direction during pre-tightening), the rotating direction of the rotating shaft 21 is opposite to the rotating direction when the rotating shaft 21 rotates to drive the anchor rod to drill a hole, and at this time, the sleeve 32 translates relative to the base 1 in the direction away from the anchor rod (as shown in fig. 4, the sleeve 32 translates forward relative to the base 1).

The rotating shaft 21 and the sleeve 32 are screw-driven by internal and external threads. Under the action of the thread pair, when the rotating shaft 21 and the sleeve 32 rotate relatively, the sleeve 32 moves in the front-back direction relative to the rotating shaft 21, and the friction force between the internal thread of the rotating shaft 21 and the external thread of the sleeve 32 is much smaller than the friction force between the sleeve 32 and the anchoring piece 31, so as to ensure that when the internal thread and the external thread are not completely engaged, the rotating shaft 21 rotates and drives the sleeve 32 to move in the front-back direction, and thus the anchoring piece 31 is driven to move in the front-back direction.

It can be understood that, when the internal thread of the rotating shaft 21 is fully engaged with the external thread of the sleeve 32, if the rotating shaft 21 rotates forward, the sleeve 32 cannot move backward relative to the rotating shaft 21 because the internal thread and the external thread are fully engaged, so that the rotating shaft 21 drives the sleeve 32 to rotate synchronously, and the drilling operation of the anchor rod can be performed. Furthermore, since the sleeve 32 is rotatably connected to the anchor 31, rotational movement of the anchor 31 is avoided. If the rotating shaft 21 rotates reversely, the sleeve 32 can move forward relative to the rotating shaft 21, and the friction force of the threads between the rotating shaft 21 and the sleeve 32 is smaller than the friction force of the rotation between the sleeve 32 and the anchor member 31, so that the rotating shaft 21 drives the sleeve 32 to move forward, the anchor member 31 is driven to move forward, and the pre-tightening operation of the anchor rod can be performed.

Therefore, the rotating shaft 21 rotates forwards and drives the anchor rod to perform drilling operation, and the rotating shaft 21 rotates backwards and drives the anchor rod to perform pre-tightening operation. And, the pivot 21 reverses, and pivot 21 drives the anchor piece 31 forward movement simultaneously, avoids anchor piece 31 to cause the interference to the pretension of stock. Similarly, when the internal thread of the rotating shaft 21 is not completely engaged with the external thread of the sleeve 32, the rotating shaft 21 rotates forward, the rotating shaft 21 drives the sleeve 32 to move backward, so as to drive the anchoring member 31 to move backward, and the anchoring member 31 stops moving backward until the internal thread and the external thread are completely engaged.

As shown in fig. 5 and 7, in some embodiments, the first grouting cylinder 42 includes a first plunger chamber 421, a first inlet pipe 422, a first outlet pipe 423, and a first plunger 424, the first inlet pipe 422 and the first outlet pipe 423 are both communicated with the bottom of the first plunger chamber 421, and at least a portion of the first plunger 424 is located in the first plunger chamber 421 and is slidable in an up-and-down direction, so that the anchoring agent enters the bottom of the first plunger chamber 421 from the first inlet pipe 422 and is discharged from the first outlet pipe 423. It will be appreciated that one-way valves may be provided on both the second inlet tube 432 and the second outlet tube 433 to control the ingress of one anchoring agent from the second inlet tube 432 into the second plunger chamber 431 and egress of one anchoring agent from the second outlet tube 433 out of the second plunger chamber 431.

The second grouting cylinder 43 includes a second plunger chamber 431, a second inlet pipe 432, a second outlet pipe 433, and a second plunger 434, both the second inlet pipe 432 and the second outlet pipe 433 are communicated with the bottom of the second plunger chamber 431, and at least a part of the second plunger 434 is located in the second plunger chamber 431 and is slidable in the up-down direction so that the anchor enters the bottom of the second plunger chamber 431 from the second inlet pipe 432 and is discharged from the second outlet pipe 433. It will be appreciated that a one-way valve may be provided on each of the first inlet tube 422 and the first outlet tube 423 to control the entry of another anchoring agent from the first inlet tube 422 into the first plunger chamber 421 and exit of the first plunger chamber 421 from the first outlet tube 423.

The pumping assembly 4 further comprises a connector 44 and a piston cylinder 45, the connector 44 is connected to the pump body 41, the connector 44 is respectively connected to the first plunger 424 and the second plunger 434, the piston cylinder 45 comprises a piston cavity 451 and a piston rod 452, the piston rod 452 is connected to the connector 44, at least a portion of the piston rod 452 is located in the piston cavity 451, and the piston rod 452 can move up and down relative to the piston cylinder 45 under the driving of hydraulic oil entering and exiting the piston cavity 451 so as to drive the connector 44 to move up and down, thereby driving the first plunger 424 and the second plunger 434 to move up and down.

Optionally, the inner diameters of the first plunger chamber 421 and the second plunger chamber 431 are the same, and the connecting piece 44 synchronously drives the first plunger 424 and the second plunger 434 to move, so that the two anchoring agents are delivered into the anchor rod according to the proportion of 1:1, and the anchoring effect is ensured.

As shown in fig. 5 and 6, in some embodiments, the pumping assembly 4 further comprises a hydraulic tank 46, the hydraulic tank 46 being connected to the pump body 41, one oil line of the hydraulic tank 46 being in communication with the upper end of the piston chamber 451, and the other oil line of the hydraulic tank 46 being in communication with the lower end of the piston chamber 451. It will be appreciated that the hydraulic tank 46 controls the flow direction of the hydraulic oil through the two oil pipes to control the hydraulic oil to push the piston rod 452 to move up and down, so that the connecting member 44 synchronously drives the first plunger 424 and the second plunger 434 to move up and down to complete the suction and discharge of the anchoring agent.

As shown in fig. 5, in some embodiments, the connecting member 44 includes a first connecting hole 441, a second connecting hole 442, and a third connecting hole 443, an upper end of the piston rod 452 extends into the first connecting hole 441 to be connected to the connecting member 44, a length of the piston rod 452 extending into the first connecting hole 441 is adjustable, an upper end of the first plunger 424 extends into the second connecting hole 442 to be connected to the connecting member 44, and an upper end of the second plunger 434 extends into the third connecting hole 443 to be connected to the connecting member 44.

Further, the piston rod 452 is threadedly coupled to the first coupling hole 441 so as to adjust the length of the piston rod 452 extending into the first coupling hole 441. The pumping assembly 4 further includes a first nut 471 and a second nut 472, the first nut 471 is located above the connecting member 44 and abuts against the upper surface of the connecting member 44, the first plunger 424 penetrates the second connecting hole 442, the upper end of the first plunger 424 is in threaded connection with the first nut 471, the first plunger 424 is provided with a first limiting portion, the first limiting portion is located below the connecting member 44 and abuts against the lower surface of the connecting member 44 so as to limit the length of the first plunger 424 extending into the second connecting hole 442, the second nut 472 is located above the connecting member 44 and abuts against the upper surface of the connecting member 44, the second plunger 434 penetrates the third connecting hole 443, the upper end of the second plunger 434 is in threaded connection with the second nut 472, the second plunger 434 is provided with a second limiting portion, the second limiting portion is located below the connecting member 44 and abuts against the lower surface of the connecting member 44 so as to limit the length of the second plunger 434 extending into the third connecting hole 443.

As shown in fig. 5-7, in some embodiments, the pumping apparatus further includes a first sealing boot 481, a second sealing boot 482, a third sealing boot 483, and a cover plate 484, the first sealing boot 481 being located in piston chamber 451 and above piston chamber 451 so as to close off the upper portion of piston chamber 451, the second sealing boot 482 being located in first plunger chamber 421 and above first plunger chamber 421 so as to close off the upper portion of first plunger chamber 421, the third sealing boot 483 being located in second plunger chamber 431 and above second plunger chamber 431 so as to close off the upper portion of second plunger chamber 431, and the cover plate 484 being provided at the upper end of pump body 41 and connected to pump body 41 so as to close off first sealing boot 481, second sealing boot 482, and third sealing boot 483.

In some embodiments, the piston chamber 451 is located between the first plunger chamber 421 and the second plunger chamber 431 in the left-right direction, and the first plunger chamber 421 and the second plunger chamber 431 are left-right symmetric with respect to the center line of the piston chamber 451.

In some embodiments, the first inlet pipe 422 and the first outlet pipe 423 are disposed opposite to each other in the left-right direction, and the second inlet pipe 432 and the second outlet pipe 433 are disposed opposite to each other in the left-right direction.

The embodiment of the second aspect of the invention also provides a construction method, which comprises the following steps:

providing a bolting device according to any of the above embodiments, connecting the bolt to the end of the shaft 21 remote from the anchor 31 and communicating the bolt with the through bore 211;

controlling a water injection pump to inject water into the anchor rod through the water flow passage 311 and the through hole 211;

controlling the driving piece 22 to drive the rotating shaft 21 to rotate forwards so as to drive the anchor rod to drill holes in a forward rotation mode;

after drilling is completed, the driving piece 22 is controlled to stop, and then the water injection pump is controlled to stop injecting water into the anchor rod;

controlling the first grouting cylinder 42 and the second grouting cylinder 43 to pump the anchoring agent into the anchor rod through the fluid passage 312 and the through hole 211 in a set ratio;

after grouting is finished, the driving part 22 is controlled to drive the rotating shaft 21 to rotate reversely, and the rotating shaft 21 drives the pre-tightening nut on the anchor rod to rotate reversely, so that pre-tightening of the anchor rod is realized.

According to the construction method provided by the embodiment of the invention, by adopting the anchor bolt supporting device provided by the embodiment, drilling, grouting and pre-tightening processes can be automatically carried out, the automation degree is high, the anchor bolt supporting operation efficiency is improved, and the labor intensity of constructors is reduced.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although the above embodiments have been shown and described, it should be understood that they are exemplary and should not be construed as limiting the present invention, and that many changes, modifications, substitutions and alterations to the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A bolting device, characterised by comprising:

a base seat, a plurality of fixing holes and a plurality of fixing holes,

the drilling assembly is connected to the base and comprises a rotating shaft and a driving piece, the rotating shaft is provided with a through hole, the axis of the through hole is arranged along the axial direction of the rotating shaft, and the driving piece is in transmission connection with the rotating shaft;

the grouting assembly is slidably connected to the base and comprises an anchor part and a sleeve, a water flow channel and a plurality of fluid channels which are not communicated with each other are arranged on the anchor part, the water flow channel and the fluid channels are communicated with the through hole, the sleeve is rotatably connected to the anchor part, at least part of the sleeve is positioned in the through hole and is in spiral transmission with the rotating shaft, and one part of the anchor part is positioned in the through hole;

the pumping assembly comprises a pump body, a first grouting cylinder and a second grouting cylinder, the first grouting cylinder and the second grouting cylinder are connected into the pump body, the first grouting cylinder is communicated with one part of the fluid channel, and the second grouting cylinder is communicated with the other part of the fluid channel.

2. The bolting device according to claim 1, wherein said through hole comprises a first section and a second section connected along the length direction thereof, one end of said first section far from said second section is provided with a polygonal joint matched with the bolt direction, the inner diameter of said first section is smaller than the inner diameter of said second section, an inner thread is provided in said second section, an outer thread is provided on the peripheral wall of said sleeve, said sleeve is connected with said rotating shaft by a thread, the nominal size of said inner thread in said second section is D, the inner diameter of said second section is D, and the nominal size D of said inner thread in said second section and the inner diameter D of said second section should satisfy D > D.

3. The bolting device of claim 1, wherein said first grouting cylinder comprises a first plunger chamber, a first inlet pipe, a first outlet pipe and a first plunger, said first inlet pipe and said first outlet pipe are both communicated with the bottom of said first plunger chamber, at least part of said first plunger is located in said first plunger chamber and is slidable in the up-down direction, so that an anchoring agent enters the bottom of said first plunger chamber from said first inlet pipe and is discharged from said first outlet pipe;

the second grouting cylinder comprises a second plunger cavity, a second inlet pipe, a second outlet pipe and a second plunger, the second inlet pipe and the second outlet pipe are both communicated with the bottom of the second plunger cavity, and at least part of the second plunger is positioned in the second plunger cavity and is slidable in the vertical direction, so that the anchoring agent enters the bottom of the second plunger cavity from the second inlet pipe and is discharged from the second outlet pipe;

the pumping assembly further comprises a connecting piece and a piston cylinder, the connecting piece is connected to the upper portion of the pump body, the connecting piece is respectively connected with the first plunger and the second plunger, the piston cylinder comprises a piston cavity and a piston rod, the piston rod is connected with the connecting piece, at least part of the piston rod is located in the piston cavity, the piston rod can move up and down in the piston cavity under the driving of hydraulic oil in the piston cavity, so that the connecting piece is driven to move up and down, and the first plunger and the second plunger are driven to move up and down.

4. The bolting device of claim 3, wherein said pumping assembly further comprises a hydraulic tank connected to said pump body, one of said oil lines of said hydraulic tank communicating with an upper end of said piston chamber and the other of said oil lines of said hydraulic tank communicating with a lower end of said piston chamber.

5. A bolting device according to claim 3, characterised in that said connecting member comprises:

the upper end of the piston rod extends into the first connecting hole to be connected with the connecting piece, and the length of the piston rod extending into the first connecting hole is adjustable;

the upper end of the first plunger extends into the second connecting hole to be connected with the connecting piece;

and the upper end of the second plunger extends into the third connecting hole to be connected with the connecting piece.

6. The bolting device according to claim 5, wherein said piston rod is threadedly coupled to said first coupling hole so as to adjust a length of said piston rod extending into said first coupling hole;

the pumping assembly further comprises:

the first nut is positioned above the connecting piece and abuts against the upper surface of the connecting piece, the first plunger penetrates through the second connecting hole, the upper end of the first plunger is in threaded connection with the first nut, the first plunger is provided with a first limiting part, and the first limiting part is positioned below the connecting piece and abuts against the lower surface of the connecting piece so as to limit the length of the first plunger extending into the second connecting hole;

the second nut, the second nut is located connecting piece top and end the upper surface of connecting piece, the second plunger runs through the third connecting hole, just the upper end and the second nut threaded connection of second plunger, the second plunger is equipped with the spacing portion of second, the spacing portion of second is located the below of connecting piece and end the lower surface of connecting piece, so that prescribe a limit to the second plunger stretches into the length of third connecting hole.

7. The bolting device according to claim 6, wherein said pumping device further comprises:

the first sealing sleeve is positioned in the piston cavity and positioned at the upper part of the piston cavity so as to seal off the upper part of the piston cavity;

a second sealing sleeve positioned in the first plunger cavity and at the upper part of the first plunger cavity so as to seal off the upper part of the first plunger cavity;

a third sealing sleeve located within the second plunger cavity and above the second plunger cavity so as to seal off the upper portion of the second plunger cavity;

and the cover plate is arranged at the upper end of the pump body and is connected with the pump body so as to limit the first sealing sleeve, the second sealing sleeve and the third sealing sleeve.

8. The bolting device of claim 3, wherein said piston chamber is located between said first plunger chamber and said second plunger chamber in a side-to-side direction, and said first plunger chamber and said second plunger chamber are side-to-side symmetric about a centerline of said piston chamber.

9. A bolting device according to any of claims 3-8, characterised in that said first inlet tube and said first outlet tube are arranged opposite each other in a left-right direction and said second inlet tube and said second outlet tube are arranged opposite each other in a left-right direction.

10. A construction method, characterized by comprising:

providing a bolting device according to any of claims 1-9, connecting a bolt to an end of said shaft remote from said anchor element and communicating said bolt with said bore;

controlling the water injection pump to inject water into the anchor rod through the water flow channel and the through hole;

controlling the driving piece to drive the rotating shaft to rotate forwards so as to drive the anchor rod to drill in a forward rotation manner;

after drilling is finished, controlling the driving piece to stop, and then controlling the water injection pump to stop injecting water into the anchor rod;

controlling the first grouting cylinder and the second grouting cylinder to pump anchoring agent into the anchor rod in a set proportion through the fluid channel and the through hole;

after grouting is finished, the driving piece is controlled to drive the rotating shaft to rotate reversely, and the rotating shaft drives the pre-tightening nut on the anchor rod to rotate reversely, so that pre-tightening of the anchor rod is realized.

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