CN211692523U

CN211692523U - Let pressure stock

Info

Publication number: CN211692523U
Application number: CN201922266298.1U
Authority: CN
Inventors: 邢阔; 张勇; 钟云; 杨优武
Original assignee: China Second Metallurgy Group Co Ltd
Current assignee: China Second Metallurgy Group Co Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-10-16
Anticipated expiration: 2029-12-17

Abstract

The utility model discloses a let press stock, including sleeve pipe, screw rod, the sleeve pipe is cylindric to the one end opening other end seals, sheathed tube open end inner wall be provided with screw rod complex screw thread, the sheathed tube lateral wall is provided with the square hole, be provided with the movable block in the square hole, the screw rod inserts in the sheathed tube inner chamber with the screw-thread fit one end of sheathed tube open end inner wall, the movable block passes through coupling mechanism and is connected with the screw rod, enable the movable block along sheathed tube radial movement after the screw rod removes, the other end of screw rod overlaps in proper order and is equipped with the tray, lets press pipe and nut, the tray is discoid, the tray is located sheathed tube open end portion. The pressure yielding pipe is positioned between the tray and the nut. The positive pressure between movable block and the rock mass has been strengthened in the removal of screw rod drive movable block, has improved the fixed effect of stock, lets the pressure tube can the pressurized deformation play the buffering to the stock, lets the deformation of pressure tube can audio-visually react out the atress condition of stock.

Description

Let pressure stock

Technical Field

The utility model relates to a construction technical field, concretely relates to let and press stock.

Background

The anchor rod is the most basic component of the roadway support, and the anchor rod reinforces the surrounding rocks of the roadway together to support the surrounding rocks per se. The conventional anchor rod is not only used for mines, but also used in engineering technology for reinforcing main bodies of slopes, tunnels and dams. The anchor rod is used as a tension member penetrating into the stratum, one end of the anchor rod is connected with an engineering structure, the other end of the anchor rod penetrates into the stratum, the whole anchor rod is divided into a free section and an anchoring section, the free section is an area for transmitting the tension at the head of the anchor rod to an anchoring body, and the anchor rod is used for applying prestress to the anchor rod. In the foundation pit support, the stock is one of the commonly used support forms, and the stock low price is widely used, but, the stock generally is cylindric reinforcing bar pole, and the frictional force between the reinforcing bar pole and the soil body is less, leads to the support effect relatively poor. Meanwhile, in a large-deformation roadway with deep-buried soft rock and high ground stress, the anchor rod cannot adapt to deformation of surrounding rock of the roadway and is broken to fail.

SUMMERY OF THE UTILITY MODEL

The technical problem that the utility model will solve is that the frictional force between current stock and the soil body is less, leads to the stock to deviate from the stratum easily and can not play the effect of stable connection and support receiving great pulling force after receiving great pulling force, buries soft rock deeply, during the high big deformation tunnel of ground stress, the stock can not adapt to the deformation of tunnel country rock and is broken the inefficacy easily.

This practicality is realized through following technical scheme:

the utility model provides a let press stock, includes sleeve pipe, screw rod, the sleeve pipe is cylindric to the one end opening other end seals, sheathed tube open end inner wall be provided with screw rod complex screw thread, the sheathed tube lateral wall is provided with the square hole, the square hole is provided with the movable block, the screw rod inserts in the sheathed tube inner chamber with the screw-thread fit one end of sheathed tube open end inner wall, the movable block passes through coupling mechanism and is connected with the screw rod, enable the movable block along sheathed tube radial movement after the screw rod removes, the other end of screw rod overlaps in proper order and is equipped with the tray, lets press pipe and nut, the tray is discoid, the tray is located sheathed tube open end portion. The pressure yielding pipe is positioned between the tray and the nut.

In the prior art, the friction force between the anchor rod and the soil body is small, the anchor rod is easy to separate from the stratum after being pulled, the stable connection and support effects cannot be achieved, and meanwhile, in a large-deformation roadway with deep-buried soft rock and high ground stress, the anchor rod cannot adapt to deformation of roadway surrounding rock and is easy to break and lose efficacy. This application is through being provided with the square hole at sheathed tube lateral wall, the square hole sets up the movable block, the screw rod and the screw-thread fit of open end inner wall of sleeve pipe, screw rod one end is inserted in sheathed tube inner chamber, the movable block passes through coupling mechanism and is connected with the screw rod, enable the movable block after the screw rod removes and stretch out sheathed tube outer wall, let the movable block protrusion make sheathed tube diameter grow and the rock mass contact around the stock through rotatory screw rod after squeezing into the stock ground, positive pressure between movable block and the rock mass has been strengthened through the removal of screw rod drive movable block, thereby reach the increase of frictional force, the fixed effect of stock has been improved. Meanwhile, the movable block is controlled by the screw rod and can be retracted into the sleeve, and the anchor rod is convenient to detach when being temporarily used and compared with the existing expansion bolt and the like. The other end of the screw rod is sequentially sleeved with a tray, a pressure yielding pipe and a nut, the tray is disc-shaped and is located at the end part of the opening of the sleeve. The pressure yielding pipe is positioned between the tray and the nut. In the great tunnel of deflection, let the pressure pipe can receive the pressure deformation and cushion the stock, be unlikely to let the stock directly receive very big power and by the snap, let the deformation of pressing the pipe simultaneously can audio-visually react out the atress condition of stock.

Further, coupling mechanism includes connecting block, connecting rod, the connecting block center be provided with screw rod complex screw hole, the square hole lateral wall radially is provided with the track along the sheathed tube, the movable block lateral wall be provided with track complex spout, the movable block passes through the spout and installs in the square hole with the track cooperation, connecting rod one end is connected with the connecting block through the pivot, the connecting rod can revolute the axis of axle rotatory, the other end of connecting rod passes through the second pivot and is connected with the movable block, the connecting rod can rotate around the axis of second pivot, the connecting block passes through the screw hole and is connected with the screw rod, the screw rod rotates and can drive the connecting block removal and let the movable block along the rail-mounted movement. The connecting block is driven to move by rotating the screw rod, the connecting block drives the connecting rod to move, the connecting rod enables the movable block to push out the square hole, the problem that the friction force is small due to the fact that the clearance between the anchor rod and the anchor rod mounting hole or the pressure is small is solved by the movement of the movable block, and the stability of the anchor rod is improved.

Furthermore, a plurality of pointed bulges are arranged on the side wall of the movable block far away from the connecting rod. The pointed protrusion increases the friction force of the movable block, so that the friction force between the anchor rod and the anchor rod mounting hole is larger.

Further, the plurality of pointed protrusions protrude towards the outside of the movable block, and the pointed protrusions form acute angles with the axis of the movable block. The pointed protrusion is obliquely arranged on the side wall of the movable block to form a barb towards the opening of the sleeve and a barb towards the closed end of the sleeve, and can be embedded into the mounting hole when being pressed or pulled under force to form larger resistance.

Further, let the pressure pipe include that the one-level lets presses pipe and second grade to press the pipe, the wall thickness that the second grade lets pressed the pipe is greater than the wall thickness that the one-level let pressed the pipe, the height that highly is greater than the one-level let and presses the pipe of second grade pressure pipe. Because the wall thickness of second grade pressure yielding pipe is greater than the wall thickness that the pipe was pressed to the one-level pressure yielding, make the intensity that the pipe was pressed to the second grade be higher than the pipe was pressed to the one-level pressure yielding, the second grade is pressed the pipe and is pressed the pipe than the one-level pressure yielding and have a bigger stroke of stepping down, when the stock produced great deformation because the topography, the one-level pressure yielding pipe can be through self pressurized deformation and realize stepping down, because the pressure intensity that steps down of the pipe is pressed to the second grade is higher than the pipe is pressed to the one-level pressure yielding, the in-process of first time stepping down, the pipe can keep the. When the stock atress is bigger, the second grade lets presses the pipe and can realize letting press once more to greatly reduced stock is because of the too big possibility of being broken of quilt of atress, can maintain the stability in the great tunnel of deflection better. Simultaneously, deformation of the two-stage pressure relief pipes can be used for qualitatively monitoring the stress deformation of the anchor rod, so that workers can visually judge the stress condition of the surrounding rock of the roadway.

Furthermore, the first-stage pressure relief pipe and the second-stage pressure relief pipe are both drum-shaped pipes with two thin ends and thick middle. The first-level pressure yielding pipe and the second-level pressure yielding pipe are easy to deform when being extruded.

Further, resin washers are arranged between the tray and the first-stage yielding pipe, between the first-stage yielding pipe and the second-stage yielding pipe, and between the second-stage yielding pipe and the nut respectively. The resin gasket is arranged, so that connection among all the parts can be more compact.

Furthermore, one closed end of the sleeve is a conical head. The conical head is convenient for driving the anchor rod into the soil body.

Compared with the prior art, this practicality has following advantage and beneficial effect: the positive pressure between the movable block and the rock body is enhanced by driving the movable block to move through the screw rod, so that the increase of the friction force is achieved, and the fixing effect of the anchor rod is improved; meanwhile, the movable block is controlled by the screw rod and can be retracted into the sleeve, so that the movable block is convenient to dismantle and carry out secondary utilization; the pressure yielding pipe can be pressed and deformed to buffer the anchor rod, so that the anchor rod is not broken by directly applying a large force; the deformation of the pressure pipe can intuitively reflect the stress condition of the anchor rod. The pointed protrusion is obliquely arranged on the movable block to form a barb shape, and the barb shape can be embedded into the side wall of the mounting hole when the movable block is pressed or pulled under force, so that greater resistance is formed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the embodiments. In the drawings:

fig. 1 is a schematic overall structure diagram of the embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of the overall structure of the embodiment of the present invention.

Fig. 3 is an enlarged schematic view of a point a according to the embodiment of the present invention.

Reference numbers and corresponding part names in the drawings:

1-sleeve, 2-screw, 3-movable block, 4-tray, 5-pressure relief pipe, 6-nut, 7-connecting block, 8-connecting rod, 11-square hole, 12-resin gasket, 31-pointed bulge, 51-first-stage pressure relief pipe and 52-second-stage pressure relief pipe.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following examples and accompanying drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention and are not to be construed as limiting the present invention.

Examples

As shown in fig. 1, fig. 2, a let and press stock, a characterized in that, including sleeve pipe 1, screw rod 2, sleeve pipe 1 is cylindric to one end opening other end seals for the circular cone head, sleeve pipe 1's open end inner wall is provided with the screw thread with 2 complex of screw rod, sleeve pipe 1's lateral wall is provided with square hole 11, be provided with movable block 3 in the square hole 11, screw rod 2 inserts in sleeve pipe 1's inner chamber with the screw-thread fit one end of sleeve pipe 1 open end inner wall, movable block 3 is connected with screw rod 2 through coupling mechanism, can make movable block 3 along sleeve pipe 1's radial movement after 2 removal of screw rod, the other end cover of screw rod is equipped with tray 4 in proper order, lets pressure pipe 5 and nut 6, tray 4 is discoid, tray 4 is located sleeve pipe 1's opening tip. The pressure relief tube 5 is located between the tray 4 and the nut 6. The side wall of the movable block 3 far away from the connecting rod 8 is provided with a plurality of pointed bulges 31. A plurality of the protruding 31 of point form lies in the middle upwards slope more than of movable block 3, lets the protrusion of movable block 3 through rotatory screw rod 2 after squeezing into the stock ground for the diameter of sleeve pipe 1 becomes thick and the stock around the rock mass contact, moves through 2 drive movable blocks of screw rod 3 and has strengthened the normal pressure between movable block 3 and the rock mass, thereby reaches the increase of frictional force, has improved the fixed effect of stock. Meanwhile, the movable block 3 is controlled by the screw rod 2 and can be retracted into the sleeve 1, and the anchor rod is convenient to detach during temporary use. The other end of screw rod 2 overlaps in proper order and is equipped with tray 4, lets and presses pipe 5 and nut 6, tray 4 is discoid, tray 4 is located sleeve pipe 1's opening tip. The pressure relief tube 5 is located between the tray 4 and the nut 6. In the great tunnel of deflection, let pressure pipe 5 can the compressive deformation cushion the stock, be unlikely to let the stock directly receive very big power and by the stretch-break, let the deformation of pressing pipe 5 simultaneously can audio-visually react out the atress condition of stock. The plurality of pointed protrusions 31 protrude outward of the movable block 3, and the pointed protrusions 31 form an acute angle with the axis of the movable block 3. The pointed protrusion 31 is obliquely arranged on the side wall of the movable block 3, and a barb towards the opening of the sleeve and a barb towards the closed end of the sleeve are formed on the side wall of the movable block 3, so that the pointed protrusion can be embedded into the mounting hole when being pressed or pulled by force, and greater resistance is formed.

Specifically, as shown in fig. 2, the yielding pipe 5 includes a first-level yielding pipe 51 and a second-level yielding pipe 52, the wall thickness of the second-level yielding pipe 52 is greater than that of the first-level yielding pipe 51, the height of the second-level yielding pipe 52 is greater than that of the first-level yielding pipe 51, and the first-level yielding pipe 51 and the second-level yielding pipe 52 are drum-shaped pipes with thin ends and thick middle parts. And resin gaskets 12 are respectively arranged between the tray 4 and the first-stage pressure relief pipe 51, between the first-stage pressure relief pipe 51 and the second-stage pressure relief pipe 52 and between the second-stage pressure relief pipe 52 and the nut 6. Because the wall thickness of second grade pressure let pipe 52 is greater than the wall thickness of one-level pressure let pipe 51, make the intensity of second grade pressure let pipe 52 be higher than one-level pressure let pipe 51, the height that highly is greater than one-level pressure let pipe 51 of second grade pressure let pipe 52, make second grade pressure let pipe 52 have a bigger stroke of letting down than one-level pressure let pipe 51, when the stock because the topography produces great deformation, one-level pressure let pipe 51 can be through self pressurized deformation and realize letting down, because the pressure let intensity of second grade pressure let pipe 52 is higher than one-level pressure let pipe, the in-process of first pressure let, second grade pressure let pipe 52 can keep the original state indeformable. When the stock atress is bigger, the second grade lets presses pipe 52 can realize letting the pressure once more to greatly reduced stock is because of the too big possibility of being broken of quilt of atress, can maintain the stability in the great tunnel of deflection better. Simultaneously, deformation of the two-stage pressure relief pipes can be used for qualitatively monitoring the stress deformation of the anchor rod, so that workers can visually judge the stress condition of the surrounding rock of the roadway. The first-stage pressure-yielding pipe 51 and the second-stage pressure-yielding pipe 52 are drum-shaped pipes with thin ends and thick middle parts, so that the pressure-yielding pipe 5 is easy to deform when being extruded.

Specifically, as shown in fig. 3, coupling mechanism includes connecting block 7, connecting rod 8, 7 centers of connecting block be provided with 2 complex screw holes of screw rod, 11 lateral walls in square hole radially are provided with the track along sleeve pipe 1, 3 lateral walls of movable block be provided with track complex spout, movable block 3 passes through the spout and installs in square hole 11 with the track cooperation, 8 one end of connecting rod is connected with connecting block 7 through the pivot, connecting rod 8 can revolute the axis of axle rotatory, 8 other ends of connecting rod are passed through the second pivot and are connected with movable block 3, connecting rod 8 can rotate around the axis of second pivot, connecting block 7 is connected with screw rod 2 through the screw hole, screw rod 2 rotates and can drive connecting block 7 and remove and let movable block 3 along the rail movement.

The above-mentioned embodiments, the purpose, technical solutions and advantages of the present invention have been described in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The yielding anchor rod is characterized by comprising a sleeve (1) and a screw (2), wherein the sleeve (1) is cylindrical, and the other end of the opening at one end is closed, the inner wall of the opening end of the sleeve (1) is provided with threads matched with the screw (2), the side wall of the sleeve (1) is provided with a square hole (11), a movable block (3) is arranged in the square hole (11), one end of the screw (2) matched with the threads of the inner wall of the opening end of the sleeve (1) is inserted into the inner cavity of the sleeve (1), the movable block (3) is connected with the screw (2) through a connecting mechanism, the movable block (3) can move along the radial direction of the sleeve (1) after the screw (2) moves, the other end of the screw is sequentially sleeved with a tray (4), a yielding pipe (5) and a nut (6), the tray (4) is disc-shaped, and the tray (4) is positioned at the end part of the opening of the sleeve (1), the pressure let pipe (5) is positioned between the tray (4) and the nut (6).

2. The yielding anchor rod as claimed in claim 1, wherein the connecting mechanism comprises a connecting block (7) and a connecting rod (8), a threaded hole matched with the screw rod (2) is formed in the center of the connecting block (7), a track is arranged on the side wall of the square hole (11) along the radial direction of the sleeve (1), a sliding groove matched with the track is formed in the side wall of the movable block (3), the movable block (3) is installed in the square hole (11) in a matched mode through the sliding groove and the track, one end of the connecting rod (8) is connected with the connecting block (7) through a rotating shaft, the connecting rod (8) can rotate around the axis of the rotating shaft, the other end of the connecting rod (8) is connected with the movable block (3) through a second rotating shaft, the connecting rod (8) can rotate around the axis of the second rotating shaft, and the connecting block (7) is connected with the screw rod (2), the screw (2) rotates to drive the connecting block (7) to move, so that the movable block (3) moves along the track.

3. A yielding anchor rod according to claim 2, wherein the side wall of the movable block (3) far away from the connecting rod (8) is provided with a plurality of pointed protrusions (31).

4. A yielding bolt according to claim 3, characterized in that the plurality of pointed protrusions (31) protrude towards the outside of the movable block (3), and the plurality of pointed protrusions (31) form an acute angle with the axis of the movable block (3).

5. A yielding bolt according to claim 1, characterized in that the yielding pipe (5) comprises a primary yielding pipe (51) and a secondary yielding pipe (52), the wall thickness of the secondary yielding pipe (52) is greater than that of the primary yielding pipe (51), and the height of the secondary yielding pipe (52) is greater than that of the primary yielding pipe (51).

6. A yielding bolt according to claim 5, wherein the primary yielding pipe (51) and the secondary yielding pipe (52) are both in the shape of drum pipes with thin ends and thick middle.

7. A yielding bolt according to claim 5, characterized in that resin gaskets (12) are respectively arranged between the tray (4) and the first-stage yielding pipe (51), between the first-stage yielding pipe (51) and the second-stage yielding pipe (52), and between the second-stage yielding pipe (52) and the nut (6).

8. A yielding bolt according to claim 1, wherein the closed end of the sleeve (1) is a conical head.