A grouting anchor with tensile support and automatic grouting stop function

Abstract

The present invention discloses a grouting anchor with tensile support and automatic grouting stopping functions, comprising a hollow rod body, a conical sealing plug, a pressure plate and a clamping nut, wherein the conical sealing plug, the pressure plate and the clamping nut are sequentially mounted on the tail end of the hollow rod body, an end fixing assembly is fixedly mounted on the head end of the hollow rod body, a rotating assembly is mounted in the hollow rod body near the end fixing assembly, the end fixing assembly is drivingly connected to the rotating assembly, and a sealing assembly is matched with a sliding seal in the hollow rod body. By setting up a sealing assembly, during the grouting preparation work, the sealing assembly can be pushed to squeeze the air in the hollow rod body, so that the air is blown into the space between the anchor rod and the anchor hole, thereby achieving the purge of the anchor hole; by setting up a tightening assembly, the push pin is pushed by the cam top block to be inserted into the inner wall surface of the anchor hole, thereby being inserted into the formation, so as to improve the connection effect between the slurry, the formation and the anchor rod.

Description

Technical Field

[0001] The invention relates to the technical field of anchor rods, in particular to a grouting anchor rod with tensile support and automatic grouting stopping functions. Background Art

[0002] The grouting anchor is an anchor with a hollow design. The hole inside can be used as a grouting channel to facilitate grouting into the anchor hole and the formation, thereby obtaining a better anchoring effect.

[0003] When the existing hollow anchor rod is in use, there is no direct connection and fixation between the outer wall of the anchor rod and the anchor hole. The connection is completely formed by solidification of the slurry, and the connection strength is limited. Moreover, during grouting, the slurry is injected simply by pressure, which cannot guarantee the bonding effect between the slurry and various components and the formation after grouting, indirectly affecting the anchoring force. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to provide a grouting anchor rod with tensile support and automatic grouting stopping functions to improve the anchoring effect.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a grouting anchor with tensile support and automatic grouting stopping functions, comprising a hollow rod body, a conical sealing plug, a pressure plate and a clamping nut, wherein the conical sealing plug, the pressure plate and the clamping nut are sequentially installed on the tail end of the hollow rod body, an end fixing assembly is fixedly installed on the head end of the hollow rod body, a rotating assembly is installed in the hollow rod body near the end fixing assembly, the end fixing assembly is drivingly connected to the rotating assembly, a sealing assembly is cooperated with a sliding seal in the hollow rod body, the sealing assembly and the space in the hollow rod body form a sealed cavity, a connecting hole communicating with the sealed cavity is penetrated and opened on the side wall of the hollow rod body; a tightening assembly and an outward expansion assembly are respectively installed on the side wall of the hollow rod body along its axial direction, when grouting is injected into the sealed cavity: the sealing assembly is pushed to move under the action of the grouting pressure, the sealing assembly drives the tightening assembly to extend and tighten the inner wall of the anchor hole, and the sealing assembly drives the outward expansion assembly to expand and tighten the anchor hole wall.

[0006] The above-mentioned grouting anchor with tensile support and automatic grouting stopping function, the tightening assembly comprises a push pin, a swing plate, a cam push block and a push rod, the side wall surface of the hollow rod body is provided with a pin hole along its radial direction, the push pin is slidably mounted in the pin hole, the side wall surface of the hollow rod body is provided with a sliding groove, one end of the swing plate is hinged with the two side groove walls of the sliding groove, and the other end of the swing plate protrudes from the sliding groove, and one end of the push rod is rotatably connected to the upper side wall of the swing plate near the hinge. A limiting groove is provided on the inner end surface of the limiting groove and a sliding block is slidably matched with the inner end surface of the limiting groove. An elastic block is installed between the end of the sliding block and the groove bottom wall of the limiting groove, and the other end of the push rod is inserted into the limiting groove and hinged to the sliding block. The cam push block is fixedly mounted on the lower part of the swing plate near the hinge, and the cam wall surface of the cam push block abuts against the inner end surface of the push pin.

[0007] The above-mentioned grouting anchor with tensile support and automatic grouting stopping functions, a convex ring is fixedly installed on the inner end of the side wall of the top pin, two or more upper protrusions are fixedly installed along the axial direction on one side of the inner wall of the pin hole, and two or more lower protrusions are fixedly installed along the axial direction on the other side of the inner wall of the pin hole, the upper protrusions and the lower protrusions are staggered, and the radial distance between the end of the upper protrusion and the end of the lower protrusion is smaller than the outer diameter of the convex ring.

[0008] The above-mentioned grouting anchor with tensile support and automatic grouting stopping functions, the cam top block includes a fast lifting section and a slow lifting section with smooth transition connection, in the lifting rotation direction of the cam top block, the fast lifting section is located before the slow lifting section, and the axial displacement of the lifting pin pushed by the fast lifting section is greater than the axial displacement of the lifting pin pushed by the slow lifting section.

[0009] The above-mentioned grouting anchor rod with tensile support and automatic grouting stopping function, the outward expansion component comprises an outward expansion plate, a support rod, a push block and a sealing plate, the outer wall surface of the hollow rod body is provided with an installation groove along its axial direction, one end of the outward expansion plate is hinged with the two side walls of the installation groove near one end of the end fixing assembly, one end of the support rod is hinged with the middle part of the inner wall of the outward expansion plate, the inner wall surface of the hollow rod body is provided with a guide groove along its axial direction, and the push block is slidably installed in the guide groove, the other end of the support rod passes through the hollow rod body and is hinged in the middle part of the push block, a sealing plate is fixedly installed on the surface of the push block, the length of the sealing plate is greater than the length of the guide groove, and the sealing plate is sealingly fitted on the guide groove, the sealing plate is hinged on the side wall surface of the sealing plate close to the axis of the hollow rod body, and a pull rope is fixedly connected to the side of the hinged plate close to the end fixing assembly, and the other end of the pull rope is fixedly connected to the side wall of the sealing plate.

[0010] The above-mentioned grouting anchor with tensile support and automatic grouting stopping function has tooth grooves on both side walls of the guide groove, and teeth on both side walls of the push block, and the teeth are inserted into the tooth grooves.

[0011] The above-mentioned grouting anchor with tensile support and automatic grouting stopping functions, the end fixing assembly includes an end head, a stud, a threaded sleeve and a clamping plate, a groove is opened on the outer wall of the end head, a hinge seat is fixedly installed in the groove, one end of the clamping plate is hinged to the hinge seat, the stud is coaxially installed in the end head, the top end of the stud is a bare rod and is rotatably connected to a support sleeve, the end of the support sleeve is fixedly connected to the inner top wall of the end head, the other end of the stud passes through the bottom wall of the end head, a threaded sleeve is threaded on the stud, a support rod is hinged on the side wall of the threaded sleeve, the other end of the support rod passes through the side wall of the end head and is hinged to the inner wall surface of the clamping plate.

[0012] The above-mentioned grouting anchor rod with tensile support and automatic grouting stopping function, the support rod includes a telescopic rod, a telescopic sleeve and a spring, one end of the telescopic rod is inserted into the open end of the telescopic sleeve, the spring is installed between the bottom of the hole of the telescopic sleeve and the end of the telescopic rod, the other end of the telescopic rod is hinged to the side wall of the threaded sleeve, and the closed end of the telescopic sleeve is hinged to the inner wall of the clamping plate.

[0013] The above-mentioned grouting anchor with tensile support and automatic grouting stopping functions, the rotating assembly comprises a rotating column and a threaded rod, the outer wall of the rotating column contacts the inner wall of the hollow rod body, the upper side of the rotating column is provided with an exhaust hole radially extending through it, the bottom center of the rotating column is provided with a rectangular transmission hole, the bottom two sides of the rotating column are provided with through holes, the rectangular transmission hole and the rectangular transmission hole are both connected to the exhaust hole, the position of the exhaust end of the exhaust hole corresponds to the position of the connecting hole, and the side wall of the hollow rod body is provided with more than two connecting holes along its circumference; a driving shaft is inserted into the rectangular transmission hole, a retaining ring is fixedly installed at the bottom of the driving shaft, a clamping shaft is fixedly installed at the bottom of the retaining ring, a light rod is fixedly installed at the bottom of the clamping shaft, and the bottom of the light rod is threadedly connected with a threaded rod; a raceway is provided at the top of the rotating column along its circumference, a ball is installed in the raceway, the ball is pressed on the tail end of the end head, and the stud is fixedly connected to the rotating column.

[0014] The above-mentioned grouting anchor rod with tensile support and automatic grouting stopping functions, the sealing assembly includes a piston body, the side wall of the piston body is sealingly fitted with the inner wall of the hollow rod body, the side wall of the hollow rod body is provided with a sliding groove along its axial direction, a sealing block is fixedly installed on the side wall of the piston body, the sealing block is slidably fitted in the sliding groove, a grouting hole is penetrated through the sealing block, a one-way sealing plate is arranged in the grouting hole, a grouting hole is installed on the end portion, a threaded hole is coaxially penetrated through the sealing block, the threaded rod is threadedly fitted with the threaded hole, a clamping hole is coaxially opened on one end of the piston body close to the end fixing assembly, the clamping shaft is inserted into the clamping hole, and the retaining ring is sealingly fitted on the piston body; a sealing convex ring is fixedly installed in the tail end of the hollow rod body, and the inner diameter of the sealing convex ring is smaller than the outer diameter of the piston body.

[0015] The technical solution of the present invention achieves the following beneficial technical effects:

[0016] 1. By setting up the sealing component, during the grouting preparation work, the sealing component can be pushed to squeeze the air in the hollow rod body, so that the air is blown into the space between the anchor rod and the anchor hole to achieve the purge of the anchor hole; when the sealing component is pushed forward, it can cooperate with the threaded rod to drive the rotating column to rotate, so that the ejected airflow rotates and purges the gap, further improving the purge effect.

[0017] 2. By setting a tightening component, when the sealing component is pushed forward, the swing plate can be pushed to swing, so that the ejector pin is initially ejected. During grouting, the sealing component can be pushed back by the grouting pressure, thereby pushing the swing plate to swing in the opposite direction, and the ejector pin is pushed into the inner wall of the anchor hole through the cam ejector block, thereby inserting into the formation, so as to improve the connection effect between the slurry, the formation and the anchor rod; by setting an external expansion component, when the sealing component retreats, the external expansion plate can be driven to open and tighten the hole wall, thereby improving the fixing effect of the anchor rod, and connecting with the end fixing component The coordination of the parts can ensure that the anchor rod and the anchor hole are coaxial to the greatest extent; when the outer expansion plate is opened, the slurry in the anchor hole can be stirred, thereby improving the combination effect of the slurry and the anchor hole. By setting the latch teeth and the latch tooth groove to cooperate with each other, on the one hand, it can be ensured that the push block will not retreat after movement, that is, the outer expansion plate is kept in an open state; on the other hand, when the latch teeth pass through the latch tooth groove, vibration is generated, thereby improving the combination effect of the slurry, the anchor hole and the anchor rod, and when vibrating, the outer expansion plate will be driven to swing slightly, thereby improving the stirring effect of the slurry.

[0018] 3. By setting mutually staggered upper and lower protrusions and cooperating with the convex ring at the end of the ejector pin, when the ejector pin moves forward, it is constantly hindered by the mutually staggered protrusions, so that the end of the ejector pin produces a slight radial swing. When the end of the ejector pin is inserted into the formation, a certain gap is generated between the formation and the ejector pin under the action of the swing, reducing the resistance of the ejector pin when it is inserted into the formation. During the subsequent grouting, the slurry can be injected into the formation around the ejector pin through the gap, thereby improving the grouting effect and the degree of anchoring. When the convex ring passes through the upper and lower protrusions, vibration is generated and transmitted to the entire anchor rod body and the formation, thereby improving the contact effect between the slurry and various components. Since the sealing component retreats under the action of the grouting pressure, the slurry and the piston body both have a certain kinetic potential energy, and the piston body can be used to hit the swing plate, and the rapid lifting section can be used to increase the depth of the ejector pin inserted into the formation. When the second half of the ejector pin is inserted, it is pushed by the static pressure of the grouting pressure, and the resistance of the second half is relatively large, and the slow lifting section can ensure the smooth insertion of the second half of the ejector pin.

[0019] 4. By setting the mutual cooperation of the sealing component, the tightening component and the expansion component, when the sealing component retreats, its resistance is the friction between the sealing component and the hollow rod body, and the grouting pressure is relatively small. When it contacts the tightening component or the expansion component, the sealing component is hindered, causing the grouting pressure to continuously increase, thereby realizing the change of the grouting pressure cycle and realizing a large range of pulse pressure grouting, giving the slurry time to penetrate freely and improving the grouting effect. Secondly, when the tooth passes through the tooth groove and the convex ring passes through the upper and lower protrusions, the grouting pressure can fluctuate in a small range, realizing a small range of pulse grouting and further improving the grouting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention Figure 1 A front cross-sectional view of

[0021] Figure 2 A cross-sectional view of the bracing assembly of the present invention;

[0022] Figure 3 A cross-sectional schematic diagram of the ejector pin of the present invention installed in the pin hole;

[0023] Figure 4 A front view of the swing plate of the present invention;

[0024] Figure 5 A cross-sectional schematic diagram of the external expansion assembly of the present invention;

[0025] Figure 6 A schematic diagram of the three-dimensional structure of the push block of the present invention;

[0026] Figure 7 A schematic diagram of the front cross-sectional structure of the end fixing assembly of the present invention;

[0027] Figure 8A cross-sectional view of the brace of the present invention;

[0028] Fig. 9 A three-dimensional schematic diagram of the installation of the threaded rod of the present invention.

[0029] The reference numerals in the figure are as follows: 1-hollow rod body; 101-sliding groove; 102-connecting hole; 2-end fixing assembly; 201-end; 202-hinged seat; 203-card plate; 204-support rod; 205-stud; 206-threaded sleeve; 207-support sleeve; 208-telescopic rod; 209-telescopic sleeve; 210-spring; 3-rotating assembly; 301-rotating column; 302-ball; 303-exhaust hole; 304-through hole; 305-rectangular transmission hole; 306-roller; 307-drive shaft; 308-retaining ring; 309-card shaft; 310-light rod; 311-threaded rod; 4-sealing assembly; 401-piston body; 402-card hole; 403-threaded hole; 404-injection Slurry hole; 405-grouting pipe; 406-sealing block; 5-tightening assembly; 501-pin hole; 502-lift pin; 503-swinging plate; 504-push rod; 505-limiting groove; 506-sliding block; 507-elastic block; 508-upper convex block; 509-convex ring; 510-cam top block; 511-fast lifting section; 512-slow lifting section; 513-lower convex block; 6-outward expansion assembly; 601-installation groove; 602-outward expansion plate; 603-support rod; 604-guide groove; 605-push block; 606-sealing plate; 607-hinge plate; 608-pull rope; 609-grip groove; 610-grip; 7-conical sealing plug; 8-pressure plate; 9-tightening nut; 10-sealing convex ring. DETAILED DESCRIPTION

[0030] In this embodiment, a grouting anchor with tensile support and automatic grouting stop function is provided. Figure 1, comprising a hollow rod body 1, a conical sealing plug 7, a pressure plate 8 and a compression nut 9, wherein the conical sealing plug 7, the pressure plate 8 and the compression nut 9 are sequentially mounted on the tail end of the hollow rod body 1, an end fixing assembly 2 is fixedly mounted on the head end of the hollow rod body 1, a rotating assembly 3 is mounted in the hollow rod body 1 near the end fixing assembly 2, the end fixing assembly 2 is drivingly connected to the rotating assembly 3, a sealing assembly 4 is matched with a sliding seal in the hollow rod body 1, the sealing assembly 4 forms a sealed cavity with the space in the hollow rod body 1, and the side wall of the hollow rod body 1 A connecting hole 102 communicating with the sealing cavity is provided through the hollow rod body 1. By setting up the sealing component 4, during the grouting preparation work, the sealing component 4 can be pushed to squeeze the air in the hollow rod body 1, so that the air is blown into the space between the anchor rod and the anchor hole, so as to achieve the purging of the anchor hole. The side walls of the hollow rod body 1 are respectively provided with a tightening component 5 and an outward expansion component 6 along their axial direction. When grouting is injected into the sealing cavity: the sealing component 4 is pushed to move under the action of the grouting pressure, the sealing component 4 drives the tightening component 5 to extend and tighten the inner wall of the anchor hole, and the sealing component 4 drives the outward expansion component 6 to expand and tighten the anchor hole wall.

[0031] like Figure 2 As shown, the tightening assembly 5 includes a top pin 502, a swing plate 503, a cam top block 510 and a push rod 504. A pin hole 501 is provided on the side wall surface of the hollow rod body 1 along its radial direction. The top pin 502 is slidably installed in the pin hole 501. A sliding groove 101 is provided on the side wall surface of the hollow rod body 1. One end of the swing plate 503 is hinged to the groove walls on both sides of the sliding groove 101, and the other end of the swing plate 503 protrudes from the sliding groove 101. One end of the push rod 504 is rotatably connected to the upper part of the side wall of the swing plate 503 near the hinge. A limiting groove 505 is provided on the inner end surface of the top pin 502. A sliding block 506 is slidably matched in the limiting groove 505. The end of the sliding block 506 is hinged to the An elastic block 507 is installed between the bottom walls of the limiting groove 505, the other end of the push rod 504 is inserted into the limiting groove 505 and hinged with the sliding block 506, and the cam top block 510 is fixedly installed on the lower part of the swing plate 503 near the hinge, and the cam wall surface of the cam top block 510 is pressed against the inner end surface of the top pin 502. By setting the tightening component 5, when the sealing component 4 is pushed forward, the swing plate 503 can be pushed to swing, so that the top pin 502 is initially ejected. During grouting, the grouting pressure can be used to push the sealing component 4 backward, thereby pushing the swing plate 503 to swing in the opposite direction, and the top pin 502 is pushed into the inner wall surface of the anchor hole by the cam top block 510, thereby inserting into the formation, so as to improve the connection effect between the slurry, the formation and the anchor rod.

[0032] like Figure 3As shown, a convex ring 509 is fixedly installed on the inner end of the side wall of the ejector pin 502, and more than two upper protrusions 508 are fixedly installed on one side of the inner wall of the pin hole 501 along its axial direction, and more than two lower protrusions 513 are fixedly installed on the other side of the inner wall of the pin hole 501 along its axial direction. The upper protrusions 508 and the lower protrusions 513 are staggered, and the radial distance between the end of the upper protrusion 508 and the end of the lower protrusion 513 is smaller than the outer diameter of the convex ring 509. By arranging the staggered upper protrusions 508 and the lower protrusions 513 and cooperating with the convex ring 509 at the end of the ejector pin 502, when the ejector pin 502 moves forward, it is constantly hindered by the staggered protrusions, so that the end of the ejector pin 502 produces a slight radial swing. When the end of the ejector pin 502 is inserted into the formation, the formation and the ejector pin 502 are aligned under the action of the swing. 2, a certain gap is generated between the top pin 502 to reduce the resistance when the top pin 502 is inserted into the formation. During the subsequent grouting, the slurry can be injected into the formation around the top pin 502 through the gap, thereby improving the grouting effect and the degree of anchoring; when the convex ring 509 passes through the upper protrusion 508 and the lower protrusion 513, vibration will be generated and transmitted to the entire anchor rod body and the formation, thereby improving the contact effect between the slurry and various components; because the sealing component 4 retreats under the action of the grouting pressure, the slurry and the piston body 401 both have a certain kinetic potential energy, the piston body 401 can be used to impact the swing plate 503, and the fast lifting section 511 can be used to increase the depth of the top pin 502 inserted into the formation. When the second half of the top pin 502 is inserted, it is pushed by the static pressure of the grouting pressure and the resistance of the second half is relatively large, so the slow lifting section 512 can ensure that the second half of the top pin 502 is smoothly inserted.

[0033] like Figure 4 As shown, the cam top block 510 includes a fast lifting section 511 and a slow lifting section 512 which are smoothly connected. In the lifting rotation direction of the cam top block 510, the fast lifting section 511 is located before the slow lifting section 512. The axial displacement of the ejector pin 502 pushed by the fast lifting section 511 is greater than the axial displacement of the ejector pin 502 pushed by the slow lifting section 512. That is to say, the thickness increase from the front end to the rear end of the fast lifting section 511 is greater than the thickness increase from the front end to the rear end of the slow lifting section 512.

[0034] like Figure 5As shown, the outward expansion component 6 includes an outward expansion plate 602, a support rod 603, a push block 605 and a sealing plate 606. A mounting groove 601 is provided on the outer wall surface of the hollow rod body 1 along its axial direction. One end of the outward expansion plate 602 is hinged to the two side walls of the mounting groove 601 close to one end of the end fixing component 2. One end of the support rod 603 is hinged to the middle part of the inner wall of the outward expansion plate 602. A guide groove 604 is provided on the inner wall surface of the hollow rod body 1 along its axial direction. A push block 605 is slidably installed in the guide groove 604. The other end of the support rod 603 passes through the hollow rod body 1 and is hinged to the middle part of the push block 605. A sealing plate 606 is fixedly installed on the surface of the push block 605. The length of the sealing plate 606 is greater than the length of the guide groove 604. When the push block 605 moves, the sealing plate 606 can cover the guide groove 604, and the sealing plate 606 is sealed and fitted on the guide groove 604. A hinged plate 607 is hinged on the side wall of the sealing plate 606 close to the axis of the hollow rod body 1, and a pull rope 608 is fixedly connected to the side of the hinged plate 607 close to the end fixing component 2, and the other end of the pull rope 608 is fixedly connected to the side wall of the sealing plate 606. By setting the external expansion component 6, when the sealing component 4 retreats, the external expansion plate 602 can be driven to open and tighten the hole wall, thereby improving the fixing effect of the anchor rod, and cooperating with the end fixing component 2, it can ensure that the anchor rod and the anchor hole are coaxial to the greatest extent; when the external expansion plate 602 is opened, the slurry in the anchor hole can be stirred, thereby improving the bonding effect of the slurry and the anchor hole.

[0035] like Figure 5 , Figure 6 As shown, the two side walls of the guide groove 604 are provided with latch grooves 609, and the two side walls of the push block 605 are provided with latch teeth 610, and the latch teeth 610 are inserted into the latch tooth grooves 609. By setting the latch teeth 610 and the latch tooth grooves 609 to cooperate with each other, on the one hand, it can be ensured that the push block 605 will not retreat after movement, that is, it can be ensured that the outer expansion plate 602 remains in an open state. On the other hand, when the latch teeth 610 pass through the latch tooth grooves 609, vibrations will be generated, thereby improving the combination effect of the slurry with the anchor hole and the anchor rod, and when vibrating, the outer expansion plate 602 will be driven to swing slightly, thereby improving the stirring effect of the slurry.

[0036] like Figure 7As shown, the end fixing assembly 2 includes an end 201, a stud 205, a threaded sleeve 206 and a clamping plate 203. A groove is provided on the outer wall of the end 201, and a hinge seat 202 is fixedly installed in the groove. One end of the clamping plate 203 is hinged to the hinge seat 202, and the stud 205 is coaxially installed in the end 201. The top of the stud 205 is a bare rod and is rotatably connected to a support sleeve 207. The end of the support sleeve 207 is fixedly connected to the inner top wall of the end 201, and the other end of the stud 205 passes through the bottom wall of the end 201. A threaded sleeve 206 is threadedly connected to the stud 205, and a support rod 204 is hinged on the side wall of the threaded sleeve 206. The other end of the support rod 204 passes through the side wall of the end 201 and is hinged to the inner wall of the clamping plate 203.

[0037] like Figure 8 As shown, the support rod 204 includes a telescopic rod 208, a telescopic sleeve 209 and a spring 210, one end of the telescopic rod 208 is inserted into the open end of the telescopic sleeve 209, and the spring 210 is installed between the bottom of the hole of the telescopic sleeve 209 and the end of the telescopic rod 208, the other end of the telescopic rod 208 is hinged to the side wall of the threaded sleeve 206, and the closed end of the telescopic sleeve 209 is hinged to the inner wall of the clamping plate 203.

[0038] like Figure 7 , Fig. 9 As shown, the rotating assembly 3 includes a rotating column 301 and a threaded rod 311, the outer wall of the rotating column 301 contacts the inner wall of the hollow rod body 1, an exhaust hole 303 is opened along the radial direction of the upper side of the rotating column 301, a rectangular transmission hole 305 is opened at the bottom center of the rotating column 301, through holes 304 are opened on both sides of the bottom of the rotating column 301, the rectangular transmission hole 305 and the rectangular transmission hole 305 are both connected to the exhaust hole 303, the exhaust end position of the exhaust hole 303 corresponds to the position of the connecting hole 102, and more than two connecting holes 102 are opened on the side wall of the hollow rod body 1 along its circumference; a driving shaft 3 is inserted into the rectangular transmission hole 305. 07, a retaining ring 308 is fixedly installed on the bottom of the driving shaft 307, a clamping shaft 309 is fixedly installed on the bottom of the clamping shaft 309, a smooth rod 310 is fixedly installed on the bottom of the clamping shaft 309, and a threaded rod 311 is threadedly connected to the bottom of the smooth rod 310; a raceway 306 is opened on the top of the rotating column 301 along its circumference, and a ball 302 is installed in the raceway 306, and the ball 302 is pressed on the tail end of the end head 201, and the stud 205 is fixedly connected to the rotating column 301, and when the sealing component 4 is pushed forward, it can cooperate with the threaded rod 311 to drive the rotating column 301 to rotate, so that the ejected airflow rotates and blows the gap, further improving the blowing effect.

[0039] like Figure 7 As shown, the sealing assembly 4 includes a piston body 401, the side wall of the piston body 401 is sealed with the inner wall of the hollow rod body 1, the side wall of the hollow rod body 1 is provided with a sliding groove 101 along its axial direction, and a sealing block 406 is fixedly installed on the side wall of the piston body 401, and the sealing block 406 is slidably fitted in the sliding groove 101. The inner layer of the sealing block 406 can be a hard material to ensure that the sealing block 406 can be restricted in the sliding groove 101 so that the piston body 401 will not rotate. The outer layer of the sealing block 406 is a soft sealing material to ensure the sealing effect, so that the piston body 401 can smoothly pass through the hinge The plate 607 and the swing plate 503 are kept sealed, the sealing block 406 is penetrated with a grouting hole 404, the grouting hole 404 is provided with a one-way sealing plate, the end is installed with a grouting hole 404, the sealing block 406 is coaxially penetrated with a threaded hole 403, the threaded rod 311 is threadedly matched with the threaded hole 403, the piston body 401 is coaxially provided with a clamping hole 402 on one end close to the end fixing component 2, the clamping shaft 309 is inserted into the clamping hole 402, and the retaining ring 308 is sealed and attached to the piston body 401; a sealing is fixedly installed in the tail end of the hollow rod body 1 The inner diameter of the sealing convex ring 10 is smaller than the outer diameter of the piston body 401. By setting mutually staggered upper convex blocks 508 and lower convex blocks 513, and cooperating with the convex ring 509 at the end of the push pin 502, when the push pin 502 moves forward, it is constantly hindered by the mutually staggered convex blocks, so that the end of the push pin 502 produces a slight radial swing. When the end of the push pin 502 is inserted into the formation, a certain gap is generated between the formation and the push pin 502 under the action of the swing, reducing the resistance of the push pin 502 when it is inserted into the formation. During the subsequent grouting, the slurry can be injected into the formation around the push pin 502 through the gap, thereby improving the grouting effect and anchoring. degree; when the convex ring 509 passes through the upper protrusion 508 and the lower protrusion 513, vibration will be generated and transmitted to the entire anchor rod body and the formation, thereby improving the contact effect between the slurry and various components; because the sealing component 4 retreats under the action of the grouting pressure, the slurry and the piston body 401 both have a certain kinetic potential energy, the piston body 401 can be used to impact the swing plate 503, and the fast lifting section 511 can be used to increase the depth of the ejector pin 502 inserted into the formation. When the second half of the ejector pin 502 is inserted, it is pushed by the static pressure of the grouting pressure and the resistance of the second half is relatively large, so the slow lifting section 512 can ensure that the second half of the ejector pin 502 is smoothly inserted.

[0040] Working process: insert the anchor rod into the anchor hole, and then use the grouting pipe 405 to push the piston body 401 inward, thereby squeezing the air in the hollow rod body 1. Since the piston body 401 is restricted by the sealing block 406 and can only move axially, when the piston body 401 moves axially, the threaded hole 403 cooperates with the threaded rod 311 to drive the threaded rod 311 to rotate, and the driving shaft 307 drives the rotating column 301 to rotate, and the squeezed air passes through the through hole 304 and the exhaust hole 303 into the connecting hole 102 and blows into the anchor hole, so as to vent the anchor hole. Purge; when the rotating column 301 rotates, the stud 205 is synchronously driven to rotate, so that the threaded sleeve 206 rises, and the clamping plate 203 is pushed to expand through the support rod 204 until it supports the anchor hole. Since the support rod 204 can be retracted to a certain extent, after the clamping plate 203 supports the wall of the anchor hole, the threaded sleeve 206 can still move upward; when the piston body 401 contacts the rotating column 301, the clamping shaft 309 is inserted into the clamping hole 402 to block it, and then the threaded rod 311 is rotated to separate the threaded rod 311 from the light rod 310, so as to remove the threaded rod 311;

[0041] When the piston body 401 moves forward, it can push the swing plate 503, so that the swing plate 503 uses the push rod 504 to push the sliding block 506 and the ejector pin 502 forward;

[0042] After the purging and preliminary anchoring are completed, the conical sealing plug 7 is installed to seal the anchor hole, and then the pressure plate 8 and the clamping nut 9 are installed. The tail end of the hollow rod body 1 can be provided with an external thread to facilitate the connection of the clamping nut 9 with the hollow rod body 1, and the pressure plate 8 and the conical sealing plug 7 are squeezed, and then grouting is started. The grouting equipment is connected to the grouting pipe 405, and pressure grouting is performed. The slurry enters the through hole 304, the exhaust hole 303 and the connecting hole 102 through the grouting hole 404, and is injected into the gap between the anchor hole and the anchor rod until the slurry fills the gap. The grouting is continued, and the slurry pressure continues to increase and pushes the piston body 401 back, and drives the clamping shaft 309 to move back synchronously;

[0043] The piston body 401 contacts the swing plate 503 and presses down, and then pulls the sliding block 506, so that the sliding block 506 escapes from the limiting groove 505 without pulling the top pin 502, and then uses the cam top block 510 to continue to push the top pin 502 into the formation. Since the top pin 502 has a certain resistance when inserted into the formation, the grouting pressure continues to increase, thereby realizing pulse grouting, and finally, under the action of the slurry pressure, the swing plate 503 is pushed to fold completely downward. As the resistance disappears, the piston body 401 drops rapidly under the action of pressure, and the slurry pressure drops. The piston body 401 contacts and presses down the hinged plate 607, and under the action of the pull rope 608, the push block 605 moves and is expanded through the support rod 603 and the expansion plate 602 to support the anchor hole wall and stir the slurry. After being tightened, the resistance becomes large and the slurry pressure increases. As the slurry pressure continues to increase, it exceeds the carrying capacity of the pull rope 608, causing the pull rope 608 to break. After losing resistance, the piston body 401 retreats again and operates on the same principle until the bottom of the piston body 401 contacts and presses the sealing convex ring 10, realizing automatic sealing and stopping of slurry in the hollow rod body 1. At the same time, with the one-way sealing plate, the slurry will not flow back through the grouting hole 404. The grouting continues to be increased to the specified pressure, and then the grouting is stopped and the grouting pipe is removed to complete the automatic grouting.

[0044] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A grouting anchor with tensile support and automatic grouting stopping function, comprising a hollow rod body (1), a conical sealing plug (7), a pressure plate (8) and a compression nut (9), wherein the conical sealing plug (7), the pressure plate (8) and the compression nut (9) are sequentially mounted on the rear end of the hollow rod body (1), characterized in that: An end fixing assembly (2) is fixedly mounted on the head end of the hollow rod body (1), a rotating assembly (3) is mounted in the hollow rod body (1) near the end fixing assembly (2), the end fixing assembly (2) and the rotating assembly (3) are drivingly connected, a sealing assembly (4) is slidingly sealed in the hollow rod body (1), the sealing assembly (4) and the inner space of the hollow rod body (1) form a sealed cavity, and a connecting hole (102) which is in communication with the sealed cavity is penetrated and opened on the side wall of the hollow rod body (1); a tightening assembly (5) and an outward expansion assembly (6) are respectively mounted on the side wall of the hollow rod body (1) along its axial direction, and when grouting is injected into the sealed cavity: the sealing assembly (4) is pushed to move under the action of the grouting pressure, the sealing assembly (4) drives the tightening assembly (5) to extend and tighten the inner wall of the anchor hole, and the sealing assembly (4) drives the outward expansion assembly (6) to expand and tighten the anchor hole wall; The tightening assembly (5) comprises a push pin (502), a swing plate (503), a cam push block (510) and a push rod (504); a pin hole (501) is provided on the side wall surface of the hollow rod body (1) and penetrates along its radial direction; the push pin (502) is slidably installed in the pin hole (501); a sliding groove (101) is provided on the side wall surface of the hollow rod body (1); one end of the swing plate (503) is hinged to the two side groove walls of the sliding groove (101); the other end of the swing plate (503) protrudes from the sliding groove (101); one end of the push rod (504) is rotatably connected to the swing plate (503) A limiting groove (505) is provided on the inner end surface of the ejector pin (502) near the upper part of the side wall at the hinge, a sliding block (506) is slidably matched inside the limiting groove (505), an elastic block (507) is installed between the end of the sliding block (506) and the bottom wall of the limiting groove (505), the other end of the push rod (504) is inserted into the limiting groove (505) and is hinged to the sliding block (506), the cam ejector block (510) is fixedly installed at the lower part of the swing plate (503) near the hinge, and the cam wall surface of the cam ejector block (510) abuts against the inner end surface of the ejector pin (502).

2. A grouting anchor with tensile support and automatic grouting stop function according to claim 1, characterized in that: A convex ring (509) is fixedly mounted on the inner end of the side wall of the ejector pin (502); two or more upper protrusions (508) are fixedly mounted on one side of the inner wall of the pin hole (501) along its axial direction; and two or more lower protrusions (513) are fixedly mounted on the other side of the inner wall of the pin hole (501) along its axial direction; the upper protrusions (508) and the lower protrusions (513) are staggered, and the radial distance between the end of the upper protrusion (508) and the end of the lower protrusion (513) is smaller than the outer diameter of the convex ring (509).

3. A grouting anchor with tensile support and automatic grouting stop function according to claim 1, characterized in that: The cam top block (510) comprises a fast lifting section (511) and a slow lifting section (512) connected in a smooth transition; in the lifting rotation direction of the cam top block (510), the fast lifting section (511) is located before the slow lifting section (512); and the axial displacement amount of the lifting pin (502) pushed by the fast lifting section (511) is greater than the axial displacement amount of the lifting pin (502) pushed by the slow lifting section (512).

4. A grouting anchor with tensile support and automatic grouting stop function according to claim 1, characterized in that: The outward expansion assembly (6) comprises an outward expansion plate (602), a support rod (603), a push block (605) and a sealing plate (606); a mounting groove (601) is provided on the outer wall surface of the hollow rod body (1) along its axial direction; one end of the outward expansion plate (602) is hinged to the two side walls of the mounting groove (601) close to one end of the end fixing assembly (2); one end of the support rod (603) is hinged to the middle part of the inner wall of the outward expansion plate (602); a guide groove (604) is provided on the inner wall surface of the hollow rod body (1) along its axial direction; a push block (605) is slidably installed in the guide groove (604); the other end of the support rod (603) is inserted through the outer wall surface of the hollow rod body (1) and the push block (605) is slidably installed in the guide groove (604); The hollow rod body (1) protrudes and is hinged to the middle part of the push block (605); a sealing plate (606) is fixedly installed on the surface of the push block (605); the length of the sealing plate (606) is greater than the length of the guide groove (604), and the sealing plate (606) is sealingly fitted on the guide groove (604); a hinged plate (607) is hinged on a side wall of the sealing plate (606) close to the axis of the hollow rod body (1); a pull rope (608) is fixedly connected to a side of the hinged plate (607) close to the end fixing component (2); the other end of the pull rope (608) is fixedly connected to the side wall of the sealing plate (606).

5. A grouting anchor with tensile support and automatic grouting stop function according to claim 4, characterized in that: The side walls of the guide groove (604) are both provided with latching tooth grooves (609), and the side walls of the push block (605) are both provided with latching teeth (610), and the latching teeth (610) are inserted into the latching tooth grooves (609).

6. A grouting anchor with tensile support and automatic grouting stop function according to claim 1, characterized in that: The end fixing assembly (2) comprises an end head (201), a stud (205), a threaded sleeve (206) and a clamping plate (203); a groove is provided on the outer wall of the end head (201); a hinge seat (202) is fixedly installed in the groove; one end of the clamping plate (203) is hinged to the hinge seat (202); the stud (205) is coaxially installed in the end head (201); the top end of the stud (205) is a bare rod and is rotatably connected to a support sleeve (207), the end of the support sleeve (207) is fixedly connected to the inner top wall of the end head (201), the other end of the stud (205) passes through the bottom wall of the end head (201), the stud (205) is threadedly connected to a threaded sleeve (206), the side wall of the threaded sleeve (206) is hinged with a support rod (204), the other end of the support rod (204) passes through the side wall of the end head (201) and is hinged to the inner wall surface of the clamping plate (203).

7. A grouting anchor with tensile support and automatic grouting stop function according to claim 6, characterized in that: The support rod (204) comprises a telescopic rod (208), a telescopic sleeve (209) and a spring (210); one end of the telescopic rod (208) is inserted into the open end of the telescopic sleeve (209); the spring (210) is installed between the bottom of the hole of the telescopic sleeve (209) and the end of the telescopic rod (208); the other end of the telescopic rod (208) is hinged to the side wall of the threaded sleeve (206); and the closed end of the telescopic sleeve (209) is hinged to the inner wall surface of the clamping plate (203).

8. The grouting anchor with tensile support and automatic grouting stop function according to claim 6, characterized in that: The rotating assembly (3) comprises a rotating column (301) and a threaded rod (311); the outer wall of the rotating column (301) contacts the inner wall of the hollow rod body (1); an exhaust hole (303) is provided on the upper edge of the rotating column (301) and penetrates in a radial direction; a rectangular transmission hole (305) is provided at the center of the bottom of the rotating column (301); through holes (304) are provided on both sides of the bottom of the rotating column (301); the rectangular transmission hole (305) and the through holes (304) are both connected to the exhaust hole (303); the position of the exhaust end of the exhaust hole (303) corresponds to the position of the connecting hole (102); and two or more exhaust holes (303) are provided on the side wall of the hollow rod body (1) along its circumference. The rectangular transmission hole (102) has a driving shaft (307) inserted into it, a retaining ring (308) is fixedly mounted on the bottom of the driving shaft (307), a clamping shaft (309) is fixedly mounted on the bottom of the retaining ring (308), a smooth rod (310) is fixedly mounted on the bottom of the clamping shaft (309), and a threaded rod (311) is threadedly connected to the bottom of the smooth rod (310); a raceway (306) is provided on the top of the rotating column (301) along its circumference, a ball (302) is mounted in the raceway (306), the ball (302) is pressed against the rear end of the end head (201), and the stud (205) is fixedly connected to the rotating column (301).

9. A grouting anchor with tensile support and automatic grouting stop function according to claim 8, characterized in that: The sealing assembly (4) comprises a piston body (401), the side wall of the piston body (401) being sealingly fitted with the inner wall of the hollow rod body (1), the side wall of the hollow rod body (1) being provided with a sliding groove (101) along its axial direction, a sealing block (406) being fixedly mounted on the side wall of the piston body (401), the sealing block (406) being slidingly fitted in the sliding groove (101), a grouting hole (404) being penetrated by the sealing block (406), a one-way sealing plate being arranged in the grouting hole (404), and a grouting pipe (406) being mounted on the end of the sealing block (406). 05), a threaded hole (403) is coaxially formed through the sealing block (406), the threaded rod (311) is threadedly engaged with the threaded hole (403), a clamping hole (402) is coaxially formed on one end of the piston body (401) close to the end fixing assembly (2), the clamping shaft (309) is inserted into the clamping hole (402), and the retaining ring (308) is sealingly fitted on the piston body (401); a sealing convex ring (10) is fixedly installed in the rear end of the hollow rod body (1), and the inner diameter of the sealing convex ring (10) is smaller than the outer diameter of the piston body (401).

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