CN210918889U

CN210918889U - Reinforced cement anchor rod

Info

Publication number: CN210918889U
Application number: CN201921673854.0U
Authority: CN
Inventors: 陆凤卫; 吴承真; 叶纯志
Original assignee: Anhui Yonghao Construction Engineering Co ltd
Current assignee: Anhui Yonghao Construction Engineering Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-07-03
Anticipated expiration: 2029-09-30

Abstract

The utility model relates to a reinforced cement soil anchor rod, including drilling rod and drill bit, seted up the jet orifice on the drill bit, cement thick liquids pass through the drilling rod tip and press the cavity of annotating in the drill bit and from the jet orifice blowout, are fixed with the fixed block on the position that the drill bit lateral wall is close to the jet orifice, and the fixed block has been kept away from and has been seted up first cylindricality recess on the lateral wall of drill bit one side, still sets up the second cylindricality recess that all communicates with jet orifice and first cylindricality recess on the fixed block, installs the check valve subassembly that is used for preventing the jet. The utility model discloses in drilling process, check valve subassembly can effectually block silt and the pebble that is little with jet orifice aperture in the jet orifice outside to the effectual condition of having avoided leading to the jet orifice to block up because of silt or pebble get into the jet orifice takes place, has reduced the probability that the jet orifice blockked up, is favorable to going on smoothly of whitewashing work.

Description

Reinforced cement anchor rod

Technical Field

The utility model belongs to the technical field of the building technique and specifically relates to a reinforced cement anchor rod is related to.

Background

The reinforced cement anchor rod can improve the connection strength between a wall body and soil, and is widely applied to reinforcement and protection of foundation pits, side slopes, tunnels and underground engineering in various complex strata. In the reinforcement and protection technology of foundation pits, side slopes, tunnels and underground engineering, the anchor rod is widely applied. During construction, the stratum is drilled, the anchor rod body is installed into the drilled hole, and cement slurry or cement mortar is poured into the gap between the anchor rod body and the drilled hole through the grouting pipe for anchoring. After drilling to the designed hole depth, high pressure cement slurry can be sprayed to cut the soil body to form a plurality of expanded anchoring bodies.

Chinese utility model patent No. CN207891880U discloses a reinforced cement anchor rod, which comprises a hollow drill bit and a hollow drill rod, wherein the drill bit is communicated with the drill rod, the drill bit is provided with a jet hole, and slurry is injected into the inner cavity of the drill bit through the drill rod and then is jetted out from the jet hole; the drill rod is fixedly connected with a limiting ring, the bearing body is sleeved on the drill rod, and the steel strand is fixedly connected to the bearing body; the utility model discloses an at the drilling rod in-process of drilling, can reduce the degree of torsion that the steel strand wires took place, avoid the steel strand wires to hold tightly on the drilling rod because of the too big winding of degree of torsion, be convenient for extract the drilling rod from drilling.

However, in the reinforced cement anchor rod in the technical scheme, soil or stones with a small aperture difference with the jet hole easily enter the jet hole in the drilling process, so that the jet hole is blocked, and the slurry spraying work is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a reinforced cement soil anchor rod, this reinforced cement soil anchor rod can effectively reduce the probability that the injection hole blockked up to be favorable to going on smoothly of whitewashing work.

The above technical purpose of the present invention can be achieved by the following technical solutions: a reinforced cement soil anchor rod comprises a drill rod and a drill bit fixed at the end part of the drill rod, wherein the drill rod and the drill bit are hollow, a jet hole is formed in the drill bit, cement slurry is injected into a cavity in the drill bit through the end part of the drill rod and is ejected out of the jet hole, a rolling bearing and a bearing ring are sleeved on the drill rod, the inner side wall of the inner ring of the rolling bearing is attached to and fixed on the outer side wall of the drill rod, the side wall of the bearing ring, far away from the drill bit, is abutted against the side wall of the outer ring of the rolling bearing, close to the drill bit, and a steel strand is; the drill bit lateral wall is fixed with the fixed block on being close to the position of jet orifice, set up first cylindricality recess on the lateral wall of drill bit one side is kept away from to the fixed block, still set up the second cylindricality recess that all communicates with jet orifice and first cylindricality recess on the fixed block, install the check valve subassembly that is used for preventing the jet orifice from blockking up in the fixed block.

By adopting the technical scheme, in the drilling process, a worker only needs to drive the drill rod to rotate by adopting the power assembly, and the drill rod drives the drill bit fixed with the drill rod to rotate, so that the part needing to be drilled is drilled; in the drilling process, the check valve assembly effectively blocks silt and stones with the aperture not much different from that of the jet holes at the outer sides of the jet holes, so that the condition that the jet holes are blocked due to the fact that the silt or the stones enter the jet holes is effectively avoided, the probability of blocking the jet holes is reduced, and smooth operation of slurry spraying is facilitated; after drilling, the staff only need take out drilling and drill bit, pass through the drilling rod simultaneously with cement thick liquid and pour into the drill bit into to make the thick liquid from the jet orifice blowout can.

The utility model discloses further set up to: the check valve subassembly is including offering on the fixed block and with the holding tank of first cylindricality recess intercommunication, be fixed in the hollow tube in the holding tank, install in the hollow tube and slide complex slide with the hollow tube, be fixed in slide and hollow tube and keep away from the spring between the inside wall of first cylindricality recess one side, be fixed in the bracing piece on the slide is close to the lateral wall of first cylindricality recess one side and be fixed in the bracing piece and keep away from the baffle of slide one end, the perforation that supplies the bracing piece to pass is seted up to the one end that the drill bit was kept away from to the hollow tube, the cooperation that slides of fenestrate inside wall and the lateral wall of bracing piece, the baffle is located first.

By adopting the technical scheme, the baffle plate has a good blocking effect on silt and stones in the drilling process, so that the silt and the stones are always positioned outside the first cylindrical groove, and the possibility of blocking the jet holes is avoided; in addition, when the cement grout is injected, the high-pressure cement grout impacts the baffle and enables the baffle to move to one side far away from the drill bit, the baffle pulls the sliding plate through the supporting rod, the sliding plate pulls the spring and enables the spring to extend, so that the cement grout is conveniently sprayed into the first cylindrical groove from the spraying hole and sprayed into the drilled hole from the first cylindrical groove, and a cement-soil anchor rod is formed in the drilled hole after the cement grout is solidified.

The utility model discloses further set up to: the cross section of the sliding plate and the cross section of the through hole are both circular, and the diameter of the sliding plate is larger than that of the through hole.

Through adopting above-mentioned technical scheme, at the injection cement thick liquid in-process, avoided the condition emergence that the slide slipped out in the perforation.

The utility model discloses further set up to: the cross section of the baffle is circular, and the area of the cross section of the baffle is sequentially increased from the side wall of the drill bit to the side far away from the drill bit until the area of the cross section of the baffle is equal to that of the cross section of the first cylindrical groove.

Through adopting above-mentioned technical scheme, after the downthehole cement thick liquid that pours into of beating, the staff need take out drill bit and drilling rod, and at the in-process that the check valve subassembly resets, the less one side of baffle cross section takes first into first cylindricality recess to this has reduced the degree of difficulty that the baffle recovered to the normal position.

The utility model discloses further set up to: and a helical blade is wound and fixed on the side wall of the drill bit.

By adopting the technical scheme, the helical blade plays a good role in assisting in drilling, and the drilling of the drill bit is facilitated; in addition, the helical blade plays a good protective role for the fixed block, and the resistance generated by the fixed block in the drilling process is reduced.

The utility model discloses further set up to: an annular guide part is fixed on the side wall of the side, close to the drill bit, of the bearing ring, the longitudinal section of the annular guide part is trapezoidal, the cross section of the annular guide part is circular, and the area of the cross section of the annular guide part is linearly decreased from the drill rod to the side close to the drill bit.

By adopting the technical scheme, the resistance of the soil to the bearing ring in the drilling process is reduced, and the bearing ring can enter the drill hole conveniently.

The utility model discloses further set up to: the inner diameter of the bearing ring and the inner diameter of the annular guide piece are both larger than the outer diameter of the drill rod.

Through adopting above-mentioned technical scheme, reduced the probability of carrier ring and annular guide with the drilling rod contact at drilling process for the drilling rod is difficult for driving the carrier ring and rotates, and the steel strand wires on the carrier ring are difficult to take place to twist reverse, avoids the steel strand wires to hold tightly on the drilling rod because of the too big winding of degree of torsion, has reduced the frictional resistance of the steel strand wires that the drilling rod received at the extraction in-process.

The utility model discloses further set up to: and the inner ring, the outer ring and the balls of the rolling bearing are coated with antirust coatings formed by curing oily antirust oil.

By adopting the technical scheme, the oily anti-rust oil is volatile solvent type anti-rust oil, the oil film is uniformly distributed, the anti-rust effect is good, the product is not greasy and sticky, and cannot pollute the product, and the anti-rust oil is attached to the inner ring, the outer ring and the balls of the rolling bearing, so that the corrosion probability of the rolling bearing is reduced, and the normal use of the rolling bearing is ensured.

To sum up, the utility model discloses a beneficial technological effect does:

in the drilling process, a worker only needs to adopt the power assembly to drive the drill rod to rotate, and the drill rod drives the drill bit fixed with the drill rod to rotate, so that the part needing to be drilled is drilled; in the drilling process, the check valve assembly effectively blocks silt and stones with the aperture not much different from that of the jet holes at the outer sides of the jet holes, so that the condition that the jet holes are blocked due to the fact that the silt or the stones enter the jet holes is effectively avoided, the probability of blocking the jet holes is reduced, and smooth operation of slurry spraying is facilitated; after drilling, the worker only needs to take out the drill hole and the drill bit and inject cement slurry into the drill bit through the drill rod so that the slurry is sprayed out from the spray hole;

in the drilling process, the baffle plate has a good blocking effect on silt and stones, so that the silt and the stones are always positioned outside the first cylindrical groove, and the possibility of blocking the jet holes is avoided; in addition, when cement slurry is injected, the high-pressure cement slurry impacts the baffle and enables the baffle to move to one side far away from the drill bit, the baffle pulls the sliding plate through the supporting rod, the sliding plate pulls the spring and enables the spring to extend, so that the cement slurry is conveniently sprayed into the first cylindrical groove from the spraying hole and sprayed into a drilled hole from the first cylindrical groove, and a cement-soil anchor rod is formed in the drilled hole after the cement slurry is solidified;

in the scheme, the oily anti-rust oil is volatile solvent type anti-rust oil, the oil film is uniformly distributed, the anti-rust effect is good, the product is not greasy and sticky, and cannot pollute the product, and the anti-rust oil is attached to the inner ring, the outer ring and the balls of the rolling bearing, so that the corrosion probability of the rolling bearing is reduced, and the normal use of the rolling bearing is ensured.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view of the structure of FIG. 1;

fig. 3 is an enlarged schematic view of a structure at a in fig. 2.

Reference numerals: 1. a drill stem; 2. a drill bit; 21. a rolling bearing; 22. a helical blade; 23. an injection hole; 3. a load ring; 31. an annular guide member; 4. steel strand wires; 5. a fixed block; 51. a first cylindrical groove; 52. a second cylindrical groove; 6. a one-way valve assembly; 61. accommodating grooves; 62. a hollow tube; 621. perforating; 63. a slide plate; 64. a spring; 65. a support bar; 66. and a baffle plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, for the utility model discloses a reinforced cement anchor rod, including drilling rod 1, drill bit 2, antifriction bearing 21, carrier ring 3, annular guide 31 and steel strand wires 4. The drill rod 1 is in a circular tube shape, and the axis of the drill rod is vertical. One end of the drill bit 2 is in a circular tube shape, the other end of the drill bit 2 is in a conical shape, the interior of the drill bit 2 is hollow, and the drill bit 2 is fixed and communicated with the end part of the drill rod 1. Referring to fig. 2, the axis of the rolling bearing 21 coincides with the axis of the drill rod 1, the rolling bearing 21 is sleeved on the drill rod 1, and the inner side wall of the inner ring of the rolling bearing 21 is attached and fixed to the outer side wall of the drill rod 1. The bearing ring 3 is of a circular ring structure, the axis of the bearing ring is overlapped with the axis of the drill rod 1, the bottom surface of the bearing ring 3 is abutted against the upper surface of the outer ring of the rolling bearing 21, and the inner diameter of the bearing ring 3 is larger than the outer diameter of the drill rod 1 and the outer diameter of the inner ring of the rolling bearing 21. The longitudinal section of the annular guide part 31 is trapezoidal, the cross section of the annular guide part 31 is circular, the axis of the annular guide part 31 is overlapped with the axis of the drill rod 1, the bottom surface of the annular guide part 31 is fixed with the upper surface of the bearing ring 3, and the area of the cross section of the annular guide part 31 is linearly decreased from the drill rod 1 to the side close to the drill bit 2. The cross section of the steel strand 4 is circular, the axis of the steel strand is parallel to the axis of the drill rod 1, and the upper end of the steel strand 4 is fixed with the bottom surface of the bearing ring 3.

As shown in fig. 2, the drill 2 is wound and fixed with a helical blade 22, the helical blade 22 is made of stainless steel metal material, and the helical blade 22 plays a good role of assisting in drilling, which is beneficial to the smooth drilling work of the drill 2. Referring to fig. 3, the side wall of the drill bit 2 is provided with an injection hole 23, the axis of the injection hole 23 is perpendicular to and intersects with the axis of the drill bit 2, and a fixing block 5 is fixed at a position of the drill bit 2 close to the injection hole 23. The fixed block 5 is a block-shaped structure with a rectangular cross section, and a first cylindrical groove 51 is formed in the side wall of the fixed block, which is far away from the drill bit 2. The cross section of the first cylindrical groove 51 is circular, the axis of the first cylindrical groove coincides with the axis of the injection hole 23, and a second cylindrical groove 52 communicated with the first cylindrical groove 51 is formed in the fixed block 5. The second cylindrical groove 52 is circular in cross section, the axis of the second cylindrical groove 52 coincides with the axis of the first cylindrical groove 51, and the second cylindrical groove 52 communicates with the injection hole 23.

As shown in fig. 2, the fixing block 5 is installed with a check valve assembly 6 for preventing the injection hole 23 from being blocked, and as shown in fig. 3, the check valve assembly 6 includes a receiving groove 61, a hollow pipe 62, a sliding plate 63, a spring 64, a support rod 65, and a blocking plate 66. The receiving groove 61 is circular in cross section with its axis parallel to the axis of the second cylindrical groove 52, and the receiving groove 61 communicates with the first cylindrical groove 51. The hollow tube 62 is a tubular structure, both ends of which are closed, the arc outer side wall of the hollow tube 62 is attached and fixed to the arc inner side wall of the accommodating groove 61, and one end of the hollow tube 62 far away from the drill bit 2 is provided with a through hole 621. The perforations 621 are circular in cross-section with their axes coinciding with the axes of the receiving grooves 61. The sliding plate 63 is in a circular plate shape, the axis of the sliding plate 63 coincides with the axis of the accommodating groove 61, the arc-shaped surface of the sliding plate 63 is in sliding fit with the inner arc-shaped surface of the accommodating groove 61, and the diameter of the sliding plate 63 is larger than that of the through hole 621, so that the sliding plate 63 is always located in the accommodating groove 61, and the sliding plate 63 is prevented from being separated from the accommodating groove 61. The expansion direction of the spring 64 is parallel to the axial direction of the receiving groove 61, one end of the spring 64 is fixed to the inner side wall of the hollow tube 62 near one end of the drill bit 2, and the other end of the spring 64 is fixed to the side wall of the sliding plate 63 near one end of the drill bit 2. The supporting rod 65 is a round rod, the axis of the supporting rod is overlapped with the axis of the through hole 621, the supporting rod 65 is matched with the through hole 621 in a sliding mode, and one end of the supporting rod 65 is fixed with the side wall of the sliding plate 63 on the side far away from the drill bit 2. The cross section of the baffle plate 66 is circular, the axis of the baffle plate is coincident with the axis of the first cylindrical groove 51, and the side wall of the baffle plate 66 close to one side of the supporting rod 65 is fixed with one end of the supporting rod 65 far away from the sliding plate 63. The area of the cross section of the baffle plate 66 is linearly increased from the drill bit 2 to the side far away from the drill bit 2 until the area of the cross section of the baffle plate 66 is equal to that of the cross section of the first cylindrical groove 51, and the arc-shaped side wall of the baffle plate 66 is in sliding fit with the arc-shaped inner side wall of the first cylindrical groove 51. In the drilling process, the spring 64 is in a natural extension state, and the baffle plate 66 is positioned in the first cylindrical groove 51, so that the silt and stones are well blocked, and the situation that the silt and stones enter the injection hole 23 to block the injection hole 23 is avoided. After the drilling, the staff only need outwards stimulate drilling rod 1 (keep drilling rod 1 to rotate), inject high-pressure cement thick liquid in the drilling rod 1 simultaneously, cement thick liquid gets into behind the drill bit 2, from jet orifice 23 blowout, cement thick liquid gets into the downthehole that drills, form the cement soil stock after the solidification, at this in-process, it is downthehole that the drilling is all stayed to bear ring 3 and annular guide 31, treat to play good reinforcing effect behind the cement thick liquid solidification, the ground intensity of grabbing of stock has been improved, the joint strength between stock and the stratum has both been improved.

As shown in fig. 2, the inner ring, the outer ring and the balls of the rolling bearing 21 are coated with oily anti-rust oil, the oily anti-rust oil is volatile solvent type anti-rust oil, oil films are uniformly distributed, the anti-rust effect is good, the product is not greasy, not sticky, and does not pollute the product, the adhesion performance is strong, the anti-rust effect is durable, and the anti-rust coating formed by curing the oily anti-rust oil enhances the anti-rust performance of the inner ring, the outer ring and the balls of the rolling bearing 21, thereby ensuring the normal use of the rolling bearing 21.

The implementation principle of the embodiment is as follows: in the drilling process, a worker only needs to drive the drill rod 1 to rotate by adopting the power assembly, and the drill rod 1 drives the drill bit 2 fixed with the drill rod 1 to rotate, so that the part needing to be drilled is drilled; in the drilling process, the check valve assembly 6 effectively blocks silt and stones with the apertures which are not different from the apertures of the jet holes 23 at the outer sides of the jet holes 23, thereby effectively avoiding the occurrence of the blocking of the jet holes 23 caused by the silt or the stones entering the jet holes 23, reducing the probability of the blocking of the jet holes 23 and being beneficial to the smooth operation of the guniting work; after drilling, the worker only needs to take out the drill hole and the drill bit 2, and simultaneously injects cement slurry into the drill bit 2 through the drill rod 1, so that the slurry is sprayed out from the spray hole 23.

This embodiment is when drilling, the staff at first need locate drilling rod 1 with carrier ring 3 cover, and support tightly the bottom surface of carrier ring 3 and the upper surface of antifriction bearing 21 outer lane (drilling process keeps steel strand wires 4 to be in taut state), make simultaneously during the drill bit 2 inserts the stratum that needs to drill, adopt driving tool to order about drilling rod 1 afterwards and rotate, drilling rod 1 drives rather than fixed drill bit 2 and rotates, in order to drill to the soil layer, helical blade 22 has played good helping hand effect, be favorable to going on smoothly of drilling work, in this process, antifriction bearing 21 promotes carrier ring 3 and annular guide 31, make carrier ring 3 and annular guide 31 get into the good downthehole of drilling. After drilling, the worker only needs to inject high-pressure cement slurry from the end part of the drill rod 1, the cement slurry enters the drill bit 2 from the drill rod 1 and then is sprayed into the second cylindrical groove 52 from the spray hole 23, at the moment, the high-pressure cement slurry impacts the baffle 66, the baffle 66 pulls the sliding plate 63 through the support rod 65, the spring 64 extends, the cement slurry is sprayed into the drilled hole from the first cylindrical groove 51, and a cement anchor rod is formed after the cement slurry is solidified. In the process of injecting cement grout, the staff need outwards pull out drilling rod 1 and drill bit 2 (this process keeps drilling rod 1 to rotate) to make antifriction bearing 21 and bearing ring 3 separate, thereby make bearing ring 3, annular guide 31 and steel strand wires 4 all remain downthehole, form reinforced cement soil stock after the cement grout solidifies, with this ground gripping intensity that improves the stock, both improved the joint strength between stock and the stratum.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a reinforced cement soil anchor rod, includes drilling rod (1) and drill bit (2) that are fixed in drilling rod (1) tip, drilling rod (1) and the equal inside cavity of drill bit (2), jet orifice (23) have been seted up on drill bit (2), and cement thick liquids pass through drilling rod (1) tip is pressed and is annotated the cavity in drill bit (2) and from jet orifice (23) blowout, its characterized in that: the drill rod (1) is sleeved with a rolling bearing (21) and a bearing ring (3), the inner side wall of the inner ring of the rolling bearing (21) is attached to and fixed with the outer side wall of the drill rod (1), the side wall of the bearing ring (3) far away from the drill bit (2) is tightly abutted to the side wall of the outer ring of the rolling bearing (21) near the drill bit (2), and a steel strand (4) is fixed on the side wall of the bearing ring (3) far away from the drill bit (2); be fixed with fixed block (5) on the position that drill bit (2) lateral wall is close to jet orifice (23), seted up first cylindricality recess (51) on the lateral wall of drill bit (2) one side is kept away from in fixed block (5), still set up on fixed block (5) with jet orifice (23) and first cylindricality recess (51) the second cylindricality recess (52) that all communicate, install in fixed block (5) and be used for preventing check valve subassembly (6) that jet orifice (23) blockked up.

2. A reinforced cement bolt as claimed in claim 1, wherein: the check valve assembly (6) comprises an accommodating groove (61) which is arranged on the fixing block (5) and communicated with the first cylindrical groove (51), a hollow pipe (62) fixed in the accommodating groove (61), a sliding plate (63) which is arranged in the hollow pipe (62) and is in sliding fit with the hollow pipe (62), a spring (64) fixed between the inner side walls of one side of the sliding plate (63) and the hollow pipe (62) far away from the first cylindrical groove (51), a support rod (65) fixed on the side wall of one side of the sliding plate (63) close to the first cylindrical groove (51) and a baffle (66) fixed at one end of the support rod (65) far away from the sliding plate (63), a through hole (621) for the support rod (65) to pass through is formed in one end of the hollow pipe (62) far away from the drill bit (2), the inner side wall of the through hole (621) is in sliding fit with the outer side wall of the support rod (65), and the baffle (66) is located.

3. A reinforced cement bolt as claimed in claim 2, wherein: the cross section of the sliding plate (63) and the cross section of the through hole (621) are both circular, and the diameter of the sliding plate (63) is larger than that of the through hole (621).

4. A reinforced cement bolt as claimed in claim 2, wherein: the cross section of the baffle plate (66) is circular, and the area of the cross section of the baffle plate (66) is sequentially increased from the side wall of the drill bit (2) to the side far away from the drill bit (2) until the area of the cross section of the baffle plate (66) is equal to that of the cross section of the first cylindrical groove (51).

5. A reinforced cement bolt as claimed in claim 2, wherein: and a helical blade (22) is wound and fixed on the side wall of the drill bit (2).

6. A reinforced cement bolt as claimed in claim 1, wherein: an annular guide piece (31) is fixed on the side wall of the side, close to the drill bit (2), of the bearing ring (3), the longitudinal section of the annular guide piece (31) is trapezoidal, the cross section of the annular guide piece (31) is circular, and the area of the cross section of the annular guide piece (31) is linearly decreased from the drill rod (1) to the side close to the drill bit (2).

7. A reinforced cement bolt as claimed in claim 6, wherein: the inner diameter of the bearing ring (3) and the inner diameter of the annular guide piece (31) are both larger than the outer diameter of the drill rod (1).

8. A reinforced cement bolt as claimed in claim 1, wherein: and the inner ring, the outer ring and the balls of the rolling bearing (21) are coated with antirust coatings formed by curing oily antirust oil.