CN118009954A - Anchor rod drawing test displacement measuring bracket - Google Patents

Abstract

The invention relates to the technical field of anchor rod testing, in particular to a displacement measuring bracket for an anchor rod drawing test, which aims at the problems that the displacement measuring bracket is inconvenient to assemble and disassemble and is inconvenient to operate in the anchor rod drawing test process in the prior art. The invention has simple structure, can conveniently fix the bracket on the anchor rod, and can conveniently open and close a plurality of fixing frames, thereby being convenient for the test personnel to take, carry and store.

Description

Anchor pull-out test displacement measurement bracket

Technical Field

The invention relates to the field of anchor rod testing, in particular to a bracket for measuring displacement of an anchor rod pull-out test.

Background technique

Anchor rods are commonly used devices in slope engineering. They are mainly used to reinforce slope engineering. The performance of anchor rods is determined by numerous performance tests.

In the process of testing the performance of anchor rods, an important indicator that needs to be measured when testing the pull-out force of anchor rods is to observe the displacement values of anchor rods under different load levels to evaluate whether the pull-out force of anchor rods meets the design and relevant standard requirements. To test the displacement value of anchor rods, a displacement meter is often needed. Since the displacement meter itself and the outside of the anchor rod do not have a structure that can be used to fix the displacement meter on the anchor rod, and when it is directly fixed on the anchor rod, it is impossible to know the possible position of the anchor rod break, which can easily damage the displacement meter. Therefore, it is necessary to use a special bracket to install it on the anchor rod to be tested. In the prior art, when the displacement measurement bracket is installed on the anchor rod, the commonly used fixing method is to tighten it on the outside of the anchor rod with bolts and other parts, which makes the disassembly and assembly of the position measurement bracket too troublesome. Moreover, since the existing bracket is provided with a component for installing the displacement meter that opens outward, the bracket generally has a certain volume, which causes the components that open outward when taking and placing the bracket and disassembling the bracket to interfere with the tester. For this reason, this scheme proposes an anchor rod pull-out test displacement measurement bracket.

Summary of the invention

The anchor rod pull-out test displacement measuring bracket proposed by the present invention solves the problems in the prior art that the displacement measuring bracket is inconvenient to disassemble and assemble and is not convenient to operate during the anchor rod pull-out experiment.

In order to achieve the above object, the present invention adopts the following technical solutions:

The anchor rod pull-out test displacement measuring bracket comprises a fixing ring and a plurality of fixing rods installed on the periphery of the fixing ring through a connecting piece, an adjusting ring is provided on the outer peripheral movable sleeve of the fixing ring, and the adjusting ring is connected to the periphery of the fixing ring through a fixing piece, a plurality of transmission components for driving the fixing rods to rotate are installed on the outer periphery of the fixing ring, the transmission components cooperate with the adjusting ring to drive the plurality of fixing rods to open or close during the rotation of the adjusting ring, two inflatable rubber rings are installed on the inner ring of the fixing ring, an inflatable component for inflating and deflating the two inflatable rubber rings is installed on the outer periphery of the fixing ring, the inflatable component cooperates with the fixing ring to drive the inflatable component to operate during the rotation of the adjusting ring.

Through the above technical solution, not only the structure is simple, but also the bracket can be conveniently fixed on the anchor rod, and multiple fixing frames can be conveniently opened and closed, thereby facilitating the test personnel to take, carry and store.

As a further improvement of the above solution, the connecting member includes a fixed block fixed to the outer periphery of the fixed ring and a fixed shaft rotatably connected to the fixed block, and the fixed rod is fixed to the outer periphery of the fixed shaft.

Through the above technical solution, the fixing rod can be rotated on the fixing block, thereby facilitating the closing and opening of the fixing rod.

As a further improvement of the above scheme, the transmission assembly includes a movable rack movably installed on the outer periphery of the fixed ring through an elastic member and an adjusting gear sleeved on the outer periphery of the fixed shaft, the movable rack is meshed with the adjusting gear, and the top surface of the adjusting ring is provided with a plurality of abutment grooves, and the plurality of movable racks cooperate to extend into the interior of the plurality of abutment grooves and abut against their bottoms respectively, and one side of the abutment groove is set as a slope gradually inclined upward.

Through the above technical solution, the movement of the movable rack can be utilized to drive the fixed shaft to rotate, thereby achieving the purpose of driving the fixed rod to rotate.

As a further improvement of the above scheme, a plurality of sliding grooves for installing elastic parts are opened on the outer periphery of the fixed ring, and the sliding grooves are arranged along the axial direction of the fixed ring. The elastic part includes a limit rod fixed inside the sliding groove along the length direction of the sliding groove, a spring 1 and a sliding sleeve movably mounted on the outer periphery of the limit rod, one end of the sliding sleeve extends to the outside of the sliding groove and is fixedly connected to the outside of the movable rack, the spring is located at the top of the sliding sleeve, the top of the spring 1 is fixedly connected to the top of the sliding groove, and the bottom of the spring 1 is fixedly connected to the top surface of the sliding sleeve.

Through the above technical solution, by utilizing the setting of the elastic member, the movable rack can automatically move downward and return to its original position under the elastic force of the spring after entering the abutment groove.

As a further improvement of the above scheme, the number of the fixing parts is , and the two fixing parts are evenly distributed on the outer circumference of the fixing ring. The outer circumference of the fixing ring is provided with two mounting grooves for respectively mounting the two fixing parts. The mounting groove extends along the outer circumferential surface of the fixing ring. The fixing part includes a sleeve rod fixed in the mounting groove, a movable sleeve arranged on the outer circumference of the sleeve rod, and a second spring. The sleeve rod is coaxially arranged with the fixing ring, one end of the movable sleeve extends to the outside of the mounting groove and is fixedly connected to the inner ring of the adjusting ring, one end of the second spring is fixedly connected to the outer wall of the movable sleeve, and the other end of the second spring is fixedly connected to the inner wall of one side of the mounting groove.

Through the above technical solution, the adjustment ring can automatically rotate back to its original position in the clockwise direction under the action of the second spring.

As a further improvement of the above scheme, the number of inflation components is set to pieces, and the inflation component includes a push plate fixed to the bottom surface of the adjusting ring, an air cylinder fixed to the outer periphery of the fixing ring, a piston plate arranged in the air cylinder and a piston column fixed to the outer wall of the piston plate close to the push plate. The air cylinder and the piston column are coaxially arranged with the fixing ring, and a spring three is fixed to the other side of the piston plate, the other end of the spring three is fixedly connected to the inner wall of the air cylinder, one end of the piston column extends to the outside of the air cylinder and cooperates with the push plate, and an air inlet pipe and an air outlet pipe are installed on the outer periphery of the air cylinder, the air outlet pipe of one inflation component is connected to one of the inflation rubber rings, and the air outlet pipe of another inflation component is connected to the other inflation rubber ring, and a one-way valve is installed on the air inlet pipe and the air outlet pipe, and a valve is also installed on the air outlet pipe, and the valve is located on the side of the one-way valve away from the air cylinder.

Through the above technical solution, the piston column is pressed to move by rotating the adjusting ring, so that the air in the air cylinder 13 is pressed into the inflatable rubber ring, thereby achieving the purpose of conveniently fixing the fixing ring to the outside of the anchor rod.

As a further improvement of the above scheme, a limit piece for fixing the adjusting ring is installed on the adjusting ring, and the limit piece includes a positioning rod arranged below the adjusting ring, a mounting plate movably sleeved on the outside of the positioning rod and a spring four. A stop block is fixed to the end of the positioning rod away from the fixing ring, and the spring four is located on the side of the mounting plate close to the stop block, one end of the spring four is fixedly connected to the mounting plate, and the other end of the spring four is fixedly connected to the stop block. The other end of the positioning rod is a right-angled triangle structure, and a plurality of limit grooves equidistantly arranged along its axial direction are provided on the outer periphery of the fixing ring, and the other end of the positioning rod is engaged in the limit groove.

Through the above technical solution, when one end of the positioning rod is stuck in the limiting groove, the adjustment ring can only rotate counterclockwise.

As a further improvement of the above solution, a plurality of handles arranged along the radial direction of the adjusting ring are fixed to the outer circumference of the adjusting ring.

The above technical solution facilitates the rotation of the adjustment ring.

Compared with the prior art, the present invention has the following beneficial effects:

1. Through the coordination between the adjusting ring, the inflatable rubber ring of the inflatable assembly, the inflatable assembly can be driven to operate by rotating the adjusting ring, thereby inflating the inflatable rubber ring, and then the fixing ring can be fixed on the anchor rod. Moreover, the setting of the inflatable rubber ring also enables the fixing ring to better adapt to anchor rods of different diameters, thereby greatly reducing the difficulty of disassembly and assembly.

2. Through the cooperation between the transmission components, multiple fixing rods can be driven to rotate while rotating the adjusting ring, so that the multiple fixing rods can be automatically opened while the fixing ring is fixed to the outside of the anchor rod, and the multiple fixing rods can be automatically folded when the fixing ring is loosened from the anchor rod, which greatly facilitates the use of the tester.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of the fixing rod of the present invention when it is closed;

FIG2 is a schematic diagram of the structure of the fixing rod of the present invention when it is opened;

Figure 3 is a schematic diagram of the structure of the air cylinder and the limit groove;

Fig. 4 is a front view of the present invention;

FIG5 is a top cross-sectional view of the fixing ring;

FIG6 is a schematic structural diagram of the elastic member in FIG4 ;

Description of main symbols:

1. Fixed ring; 2. Adjusting ring; 3. Inflatable rubber ring; 4. Fixed rod; 5. Handle; 6. Fixed block; 7. Adjusting gear; 8. Fixed shaft; 9. Stopper; 10. Abutment groove; 11. Push plate; 12. Piston column; 13. Air cylinder; 14. Movable rack; 15. Mounting plate; 16. Limiting groove; 17. Positioning rod; 18. Inlet pipe; 19. Outlet pipe; 20. Movable sleeve; 21. Sleeve rod; 22. Mounting groove; 23. Slide groove; 24. Slide sleeve; 25. Limiting rod.

Detailed ways

The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

Embodiment 1:

Please refer to Figures 1-6. The anchor pull-out test displacement measuring bracket of this embodiment includes a fixing ring 1 and a plurality of fixing rods 4 installed on the periphery of the fixing ring 1 through a connecting piece. The connecting piece includes a fixing block 6 fixed on the periphery of the fixing ring 1 and a fixing shaft 8 rotatably connected to the fixing block 6. The fixing rod 4 is fixed on the periphery of the fixing shaft 8. The rotational connection of the fixing shaft 8 on the fixing block 6 allows the fixing rod 4 to be opened or closed according to the needs of use, thereby preventing the opened fixing rod 4 from affecting the operation of the tester when taking or installing. After the installation is completed, the opened fixing rod 4 can be more conveniently used to install the displacement meter.

An adjusting ring 2 is movably sleeved on the periphery of the fixing ring 1, and the adjusting ring 2 is connected to the periphery of the fixing ring 1 through a fixing piece. A plurality of grips 5 arranged along its radial direction are fixed to the periphery of the adjusting ring 2. The arrangement of the grips 5 facilitates the rotation of the adjusting ring 2. A plurality of transmission components for driving the fixing rods 4 to rotate are installed on the periphery of the fixing ring 1. The transmission components cooperate with the adjusting ring 2 to drive the plurality of fixing rods 4 to open or close during the rotation of the adjusting ring 2. The transmission components include a movable rack 14 movably installed on the periphery of the fixing ring 1 through an elastic member and an adjusting gear 7 sleeved on the periphery of the fixing shaft 8. The movable rack 14 meshes with the adjusting gear 17. A plurality of abutment grooves 10 are provided on the top surface of the adjusting ring 2. The plurality of movable racks 14 cooperate and extend to the inside of the plurality of abutment grooves 10 respectively and abut against the bottom thereof. One side of the abutment groove 10 is arranged as a slope gradually inclined upward. When the fixing rods 4 are closed, that is, in the length direction of the fixing rods 4 When the adjusting ring 2 is rotated counterclockwise, the abutting groove 10 and the movable rack 14 move relative to each other, so that the bottom of the movable rack 14 gradually moves upward along the inclined surface of the abutting groove 10. After the movable rack 10 moves upward, the adjusting gear 7 is driven to rotate, thereby causing the fixing rod 4 to open outward until the bottom of the movable rack 14 completely moves to the outside of the abutting groove 10 and abuts against the top surface of the adjusting ring 2. The continued counterclockwise rotation of the adjusting ring 2 will no longer drive the movable rack 14 to move upward. At this time, the multiple fixing rods 4 are also fully opened and keep consistent with the radial direction of the fixing ring 1. Conversely, after the adjusting ring 2 is rotated clockwise, when the bottom of the movable rack 14 begins to enter the inside of the abutting groove 10, the multiple fixing rods 4 will also gradually retract during the descent of the movable rack 14.

The inner ring of the fixed ring 1 is provided with two inflatable rubber rings 3, and the outer circumference of the fixed ring 1 is provided with an inflatable component for inflating and deflating the two inflatable rubber rings 3. The inflatable component cooperates with the fixed ring 1 to drive the inflatable component to operate during the rotation of the adjusting ring 2. The number of inflatable components is set to 2, and the inflatable component includes a push plate 11 fixed to the bottom surface of the adjusting ring 2, an air cylinder 13 fixed to the outer circumference of the fixed ring 1, a piston plate arranged in the air cylinder 13, and a piston column 12 fixed on the outer wall of the piston plate close to the push plate 11. The air cylinder 13 and the piston column 12 are both coaxially arranged with the fixed ring 1, and a spring three is fixed on the other side of the piston plate, and the other end of the spring three is fixedly connected to the inner wall of the air cylinder 13, one end of the piston column 12 extends to the outside of the air cylinder 13 and cooperates with the push plate 11, and an air inlet pipe 18 and an air outlet pipe 19 are installed on the outer circumference of the air cylinder 13, the air outlet pipe 19 of one inflatable component is connected to one of the inflatable rubber rings 3, and the air outlet pipe 19 of the other inflatable component is connected to the other The air inlet pipe 18 and the air outlet pipe 19 are connected, and a one-way valve is installed on each of the air inlet pipe 18 and the air outlet pipe 19, and a valve is also installed on the air outlet pipe 19, and the valve is located on the side of the one-way valve away from the air cylinder 13. After the adjusting ring 2 is rotated counterclockwise, the push plate 11 will abut against the piston column 12, and then as the adjusting ring 2 continues to rotate counterclockwise, the piston column 12 will be squeezed toward the inside of the air cylinder 13, thereby pressing the air in the air cylinder 13 into the inflatable rubber ring 3 connected thereto. At this time, the spring three in the air cylinder 13 is also compressed, and the inflatable rubber ring 3 expands after being inflated, so that it can be pressed against the outer periphery of the anchor rod, and then the fixing ring 1 can be fixed on the anchor rod 1. Conversely, after the adjusting ring 2 is rotated clockwise, under the action of the spring three, the piston column moves toward the outside of the air cylinder 13, so that the outside air can be sucked into the inside of the air cylinder 13 through the air inlet pipe 18, and the setting of the valve can be opened to exhaust the gas in the inflatable rubber ring 3, thereby loosening the fixing ring 1 from the anchor rod.

A stopper for fixing the adjusting ring is installed on the adjusting ring 2, and the stopper includes a positioning rod 17 arranged below the adjusting ring 2, a mounting plate 15 movably sleeved on the outside of the positioning rod 17, and a spring four. A stopper 9 is fixed to one end of the positioning rod 17 away from the fixing ring 1, and the spring four is located on the side of the mounting plate 15 close to the stopper 9, one end of the spring four is fixedly connected to the mounting plate 15, and the other end of the spring four is fixedly connected to the stopper 9. The other end of the positioning rod 17 is a right-angled triangle structure, and a plurality of limit grooves 16 are arranged equidistantly along the axial direction of the fixing ring 1 on the outer periphery. The positioning rod 17 is provided with a plurality of stopper grooves 16 equidistantly arranged along the axial direction of the fixing ring 1. The other end of the spring 17 is engaged in the limit groove 16. The setting of the spring 4 makes the positioning rod 17 always press against the outer periphery of the fixing ring 1. After the adjusting ring 2 is rotated counterclockwise, the positioning rod 17 rotates synchronously with the adjusting ring 2, so that the positioning rod 17 continuously slides through the multiple limit grooves 16. When the positioning rod 17 is stuck in the limit groove 16, the adjusting ring 2 can only rotate counterclockwise, thereby preventing the fixing ring 1 from loosening after being fixed on the anchor rod. After one end of the positioning rod 17 is pulled out of the limit groove 16, the adjusting ring 2 can be rotated clockwise.

The implementation principle of this embodiment is as follows: when installing the bracket, first, when the fixing rod 4 is in a closed state, the fixing ring 1 is sleeved on the outside of the anchor rod, and then, at a suitable position, the grip 5 is held, and the fixing ring 5 is stabilized so that it does not rotate, and then the adjusting ring 2 is rotated counterclockwise, at this time, relative movement occurs between the abutting groove 10 and the movable rack 14, and the bottom of the movable rack 14 gradually moves upward along the inclined surface of the abutting groove 10, thereby driving the fixing rod 4 to open outward, until the bottom of the movable rack 14 completely moves to the outside of the abutting groove 10 and abuts against the top surface of the adjusting ring 2, and multiple fixing rods 4 are completely opened and kept in line with the radial direction of the fixing ring 1, and then the continued counterclockwise rotation of the adjusting ring 2 will no longer drive the movable rack 14 to move upward, and then the displacement meter can be installed on the fixing rod 4;

At the same time, during the counterclockwise rotation of the adjusting ring 2, after the push plate 11 abuts against the piston column 12, the adjusting ring 2 will continue to rotate counterclockwise and the piston column 12 will be pressed toward the inside of the air cylinder 13, so that the air in the air cylinder 13 will be introduced into the inflatable rubber ring 3 connected thereto. At this time, the spring 3 in the air cylinder 13 is also compressed, and the inflatable rubber ring 3 expands after being inflated, so that it can be pressed against the outer periphery of the anchor rod, and then the fixing ring 1 can be fixed on the anchor rod 1. During the counterclockwise rotation of the adjusting ring 2, the positioning rod 17 also slides on the outer periphery of the fixing ring 2, so that the adjusting ring 2 will not rotate clockwise.

On the contrary, when the fixing ring 1 is to be loosened from the anchor rod, one end of the positioning rod 17 can be pulled out to the outside of the limiting groove 16, and then the adjusting ring 2 can be rotated clockwise. At this time, when the bottom of the movable rack 14 begins to enter the inside of the abutment groove 10, the multiple fixing rods 4 will also gradually gather together during the descent of the movable rack 14, and the piston column 12 will return to its original position synchronously with the clockwise rotation of the piston plate, thereby sucking the outside air into the air cylinder 13, and then opening the valve, the air in the inflatable rubber ring 3 can be discharged, thereby loosening the fixing ring 1 from the anchor rod.

Embodiment 2:

In conjunction with Figure 5, on the basis of Example 1, this embodiment is further improved in that: the number of fixing members is 2, and the two fixing members are evenly distributed on the outer periphery of the fixing ring 1, and the outer periphery of the fixing ring 1 is provided with two mounting grooves 22 for respectively mounting the two fixing members, and the mounting groove 22 extends along the outer peripheral surface of the fixing ring 1, and the fixing member includes a sleeve rod 21 fixed in the mounting groove 22, a movable sleeve 20 movably sleeved on the outer periphery of the sleeve rod 21, and a spring 2, the sleeve rod 21 is coaxially arranged with the fixing ring 1, one end of the movable sleeve 20 extends to the outside of the mounting groove 22 and is fixedly connected to the inner ring of the adjusting ring 2, one end of the spring 2 is fixedly connected to the outer wall of the movable sleeve 20, and the other end of the spring 2 is fixedly connected to the inner wall of one side of the mounting groove 22, and after the adjusting ring 2 rotates counterclockwise, the spring 2 will be gradually compressed. Therefore, after the positioning rod 17 is pulled out to the outside of the limiting groove 16, the adjusting ring 2 can automatically rotate back to its original position in the clockwise direction under the action of the spring 2.

The implementation principle of this embodiment is: during the counterclockwise rotation of the adjusting ring 2, the movable sleeve 20 rotates synchronously with the adjusting ring 2, and the movable sleeve 2 gradually compresses the spring 2 during the counterclockwise rotation. When the adjusting ring 2 loses its restriction, the adjusting ring 2 will automatically rotate clockwise under the action of the elastic force of the spring 2.

The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims (8)

1. The utility model provides a stock draws experimental displacement measurement support, includes solid fixed ring and installs a plurality of dead levers in solid fixed ring periphery through the connecting piece, its characterized in that, gu fixed ring's periphery movable sleeve is equipped with the adjusting ring, and gu the adjusting ring passes through the mounting and is connected with gu fixed ring periphery, gu fixed ring periphery installs a plurality of drive assembly that are used for driving the dead lever pivoted, and drive assembly cooperatees with the adjusting ring for a plurality of dead levers of drive open or draw in at gu the pivoted in-process of adjusting ring, two rubber circles of aerifing are installed to gu the inner circle of fixed ring, the outer week of fixed ring is installed and is used for the subassembly of aerifing of two rubber circles of aerifing and aerifing the gassing, the subassembly of aerifing cooperatees with gu fixed ring, in order to be used for driving the subassembly operation of aerifing at the pivoted in-process of adjusting ring.

2. The anchor rod pullout test displacement measurement bracket of claim 1, wherein the connecting member comprises a fixed block fixed to the outer periphery of the fixed ring and a fixed shaft rotatably connected to the fixed block, and the fixed rod is fixed to the outer periphery of the fixed shaft.

3. The bracket for measuring the displacement of the anchor rod pulling test according to claim 2, wherein the transmission assembly comprises a movable rack movably mounted on the periphery of the fixed ring through an elastic piece and an adjusting gear sleeved on the periphery of the fixed ring, the movable rack is meshed with the adjusting gear, a plurality of abutting grooves are formed in the top surface of the adjusting ring, the movable racks are matched and extend into the abutting grooves respectively and are abutted to the bottoms of the abutting grooves, and one side of each abutting groove is provided with an inclined surface which is gradually inclined upwards.

4. The anchor rod drawing test displacement measurement bracket according to claim 3, wherein a plurality of sliding grooves for installing elastic pieces are formed in the periphery of the fixed ring, the sliding grooves are formed in the axial direction of the fixed ring, the elastic pieces comprise a limiting rod fixed inside the sliding grooves in the length direction of the sliding grooves, a first spring and a sliding sleeve, the first spring and the sliding sleeve are movably sleeved on the periphery of the limiting rod, one end of the sliding sleeve extends to the outside of the sliding grooves and is fixedly connected with the outside of the movable rack, the first spring is located at the top of the sliding sleeve, the top of the first spring is fixedly connected with the top of the sliding groove, and the bottom of the first spring is fixedly connected with the top surface of the sliding sleeve.

5. The anchor rod pulling test displacement measurement bracket according to claim 1, wherein the number of the fixing pieces is two, the two fixing pieces are uniformly distributed on the periphery of the fixing ring, two mounting grooves for respectively mounting the two fixing pieces are formed in the periphery of the fixing ring, the mounting grooves extend along the periphery of the fixing ring, each fixing piece comprises a sleeve rod fixed in the mounting groove, a movable sleeve movably sleeved on the periphery of the sleeve rod and a second spring, the sleeve rod is coaxially arranged with the fixing ring, one end of the movable sleeve extends to the outside of the mounting groove and is fixedly connected with the inner ring of the adjusting ring, one end of the second spring is fixedly connected with the outer wall of the movable sleeve, and the other end of the second spring is fixedly connected with the inner wall of one side of the mounting groove.

6. The anchor rod drawing test displacement measurement bracket according to claim 1, wherein the number of the inflation components is set to be several, the inflation components comprise a push plate fixed on the bottom surface of the adjusting ring, an air cylinder fixed on the periphery of the fixing ring, a piston plate arranged in the air cylinder and a piston column fixed on the outer wall of one side of the piston plate, which is close to the push plate, the air cylinder and the piston column are both coaxially arranged with the fixing ring, the other side of the piston plate is fixedly connected with the inner wall of the air cylinder, one end of the piston column extends to the outside of the air cylinder and is matched with the push plate, the periphery of the air cylinder is provided with an air inlet pipe and an air outlet pipe, the air outlet pipe of one inflation component is communicated with one inflation rubber ring, the air inlet pipe and the air outlet pipe are both provided with one-way valves, and the air outlet pipe is also provided with valves, and the valves are positioned on one side, which is far away from the one-way valves.

7. The displacement measuring bracket for the anchor rod drawing test according to claim 1, wherein the adjusting ring is provided with a limiting piece for fixing the adjusting ring, the limiting piece comprises a positioning rod arranged below the adjusting ring, a mounting plate movably sleeved outside the positioning rod and a spring IV, one end of the positioning rod, which is far away from the fixing ring, is fixedly provided with a stop block, the spring IV is positioned on one side, which is close to the stop block, of the mounting plate, one end of the spring IV is fixedly connected with the mounting plate, the other end of the spring IV is fixedly connected with the stop block, the other end of the positioning rod is of a right-angled triangle structure, a plurality of limiting grooves which are equidistantly arranged along the axial direction of the positioning rod are formed in the periphery of the fixing ring, and the other end of the positioning rod is clamped in the limiting grooves.

8. The anchor rod pullout test displacement measurement bracket of claim 1, wherein the outer circumference of the adjustment ring is fixed with a plurality of grips disposed along a radial direction thereof.