Suspension type rapid rotary jet grouting supporting device for inner wall of shaft

Abstract

The invention discloses a suspension type shaft inner wall rapid rotary jet grouting supporting device which comprises a grouting mechanism and a grouting control valve, the grouting control valve is connected with the grouting mechanism, the grouting mechanism is in fluid communication with the grouting control valve, the grouting control valve is in fluid communication with a slurry supply pipe, and the slurry supply pipe is in fluid communication with the grouting control valve. The grouting control valve is communicated with a nozzle through fluid, the outlet end of the nozzle faces the well wall, the periphery of the grouting mechanism is connected with a supporting structure, and the supporting structure is supported on the well wall. By arranging an automatic structure and cooperating with a grouting system on the ground, efficient and uniform guniting operation on the inner wall of a shaft is achieved; the grouting control valve can achieve accurate control over the guniting flow, and well walls at different positions can be conveniently controlled; and by arranging the grouting mechanism, the control effect on the grouting pressure can be improved, the grouting pressure can be accurately regulated and controlled according to different depths and needs, and therefore the uniformity of guniting operation is improved, and the spraying effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wellbore spraying construction, and more particularly to a suspended wellbore inner wall rapid rotary spraying support device. Background Art

[0002] Shaft shotcrete is an important support process in mines, tunnels and construction projects. Traditional shotcrete construction mainly relies on manual operation, which is inefficient, has poor working conditions, and cannot ensure the uniformity of shotcrete, resulting in insufficient shaft wall support strength.

[0003] Although the current semi-automatic spraying equipment can partially replace manual labor, it still requires manual operation and has not been fully automated. There are still certain shortcomings in construction efficiency and spraying quality. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to provide a fully automated suspended wellbore inner wall rapid rotary jet support device that can adapt to different well depths and underground environments.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a suspended quick rotary jet support device for the inner wall of a wellbore, comprising a grouting mechanism and a grouting control valve, wherein the grouting control valve is connected to the grouting mechanism, and the grouting mechanism is fluidly connected to the grouting control valve, the grouting control valve is fluidly connected to a slurry supply pipe, a nozzle is provided on the fluid-conducting portion of the grouting control valve, an outlet end of the nozzle is arranged toward the wellbore wall, a support structure is connected around the grouting mechanism, and the support structure is supported on the wellbore wall.

[0006] The above-mentioned suspended wellbore inner wall rapid rotary jet support device, the grouting control valve includes a valve body and a valve core, the valve core is rotatably installed in the valve body, the top of the valve body is connected to the grouting mechanism and fluid is conducted, the bottom of the valve body is connected to the nozzle and fluid is conducted, the nozzle is rotatably installed on the bottom of the valve body, one side of the valve body is connected to the slurry supply pipe and fluid is conducted, a valve stem is installed in the other side of the valve body, the valve stem is fixedly connected to the valve core, a first fluid channel is opened through the valve core, the first fluid channel connects the grouting mechanism and the nozzle, a second fluid channel is opened on the side wall of the valve core and is fluid-conducting with the slurry supply pipe, the first fluid channel and the second fluid channel are connected to each other, and the second fluid channel and the valve stem are coaxially arranged.

[0007] In the above-mentioned suspended wellbore inner wall rapid rotary jet support device, a second drive motor is installed on the valve body, and the second drive motor is coaxially fixedly connected to the valve stem.

[0008] The above-mentioned suspended wellbore inner wall rapid rotary jet support device, the grouting mechanism includes a fixed frame, a reciprocating drive component and a booster cylinder, the reciprocating drive component is fixedly connected to the fixed frame, the reciprocating drive component and the booster cylinder are drivingly connected, and the end of the booster cylinder is fluidly connected to the grouting control valve.

[0009] The above-mentioned suspended wellbore inner wall rapid rotary spraying support device, the reciprocating drive component includes a first drive motor, a crank block, a connecting rod and a fixing buckle, the first drive motor is mounted on the fixing frame, the crank block is fixedly connected to the output shaft of the first drive motor, one end of the connecting rod is rotatably connected to an end of the crank block away from the first drive motor, and the other end of the connecting rod is rotatably connected to the fixing buckle.

[0010] In the above-mentioned suspended wellbore inner wall rapid rotary grouting support device, rod end joint bearings are provided on both ends of the connecting rod, one end of the connecting rod is rotatably connected to the crank block through the rod end joint bearing, and the other end of the connecting rod is rotatably connected to the fixing buckle through the rod end joint bearing.

[0011] The above-mentioned suspended wellbore inner wall rapid rotary grouting support device, the booster cylinder includes a cylinder barrel, a piston and a piston rod, the cylinder barrel is fixedly mounted on the bottom of the fixed frame, the piston sliding seal is fitted in the cylinder barrel, one end of the piston rod is fixedly connected to the piston, the other end of the piston rod passes through the cylinder barrel and extends into the fixed frame, the fixing buckle is coaxially buckled on the piston rod; the bottom end of the cylinder barrel is fluidly connected to the grouting control valve.

[0012] The above-mentioned suspended wellbore inner wall rapid rotary grouting support device also includes a fuselage, the grouting mechanism and the grouting control valve are both installed in the fuselage, one end of the support structure is fixedly connected to the side wall of the fuselage, and the other end of the support structure is supported on the well wall.

[0013] The above-mentioned suspended wellbore inner wall rapid rotary spraying support device, the supporting structure includes a telescopic arm and a track wheel, one end of the telescopic arm is fixedly connected to the fuselage, and the track wheel is installed on the other end of the telescopic arm; the telescopic arm includes a sleeve, a telescopic rod and a spring, the telescopic rod is slidably fitted in the sleeve, the spring is installed in the sleeve, a pressure sensor is installed in the bottom of the sleeve, one end of the spring abuts against the pressure sensor, and the other end of the spring abuts against the telescopic rod, the track wheel is rotatably installed on the free end of the telescopic rod, and the bottom end of the sleeve is fixedly connected to the fuselage.

[0014] In the above-mentioned suspended wellbore inner wall rapid rotary jet support device, a support frame is fixedly connected to the top of the fuselage, a fixing ring is fixedly connected to the top of the support frame, and the slurry supply pipe passes through the fixing ring.

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

[0016] By setting up an automated structure and cooperating with the grouting system on the ground, efficient and uniform grouting operations can be achieved on the inner wall of the wellbore; the grouting control valve can achieve precise control of the grouting flow rate, which is convenient for controlling the well wall at different positions; by setting up a grouting mechanism, the control effect of the grouting pressure can be improved, and the grouting pressure can be accurately adjusted according to different depths and needs, thereby improving the uniformity of the grouting operation and improving the spraying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 A schematic diagram of the three-dimensional structure of the grouting mechanism and the grouting control valve of the present invention;

[0019] Figure 3 A schematic cross-sectional view of the grouting mechanism and the grouting control valve of the present invention;

[0020] Figure 4 A schematic cross-sectional view of the telescopic arm of the present invention.

[0021] The reference numerals in the figure are represented as follows: 1-body; 2-telescopic arm; 201-sleeve; 202-telescopic rod; 203-spring; 204-pressure sensor; 3-track wheel; 4-grouting mechanism; 401-fixed frame; 402-first drive motor; 403-crank block; 404-connecting rod; 405-fixed buckle; 406-piston rod; 407-cylinder; 408-piston; 5-grouting control valve; 501-valve body; 502-valve core; 503-valve stem; 504-second drive motor; 6-slurry supply pipe; 7-nozzle; 8-support frame. DETAILED DESCRIPTION

[0022] A suspended wellbore inner wall rapid jet grouting support device in this embodiment, such as Figure 1-2 As shown, it includes a fuselage 1, a grouting mechanism 4 and a grouting control valve 5, the grouting mechanism 4 and the grouting control valve 5 are both installed in the fuselage 1, the grouting control valve 5 is connected to the grouting mechanism 4, and the grouting mechanism 4 is fluidly connected to the grouting control valve 5, the grouting control valve 5 is fluidly connected to the slurry supply pipe 6, the grouting control valve 5 is fluidly connected with a nozzle 7, the outlet end of the nozzle 7 is arranged toward the well wall, one end of the support structure is fixedly connected to the side wall of the fuselage 1, and the other end of the support structure is supported on the well wall; a support frame 8 is fixedly connected to the top of the fuselage 1, a fixing ring is fixedly connected to the top of the support frame 8, the slurry supply pipe 6 passes through the fixing ring, and the support frame 8 is used to connect with the suspension cable.

[0023] like Figure 1 As shown, the supporting structure includes a telescopic arm 2 and a track wheel 3, one end of the telescopic arm 2 is fixedly connected to the fuselage 1, and the track wheel 3 is installed on the other end of the telescopic arm 2. Three telescopic arms 2 are arranged at equal intervals around the fuselage 1, and each group of telescopic arms can provide equal supporting force to ensure that the fuselage 1 is in the center of the wellbore.

[0024] Specifically, Figure 4 As shown, the telescopic arm 2 includes a sleeve 201, a telescopic rod 202 and a spring 203. The telescopic rod 202 is slidably fitted in the sleeve 201, and the spring 203 is installed in the sleeve 201. A pressure sensor 204 is installed in the bottom of the sleeve 201. One end of the spring 203 abuts against the pressure sensor 204, and the other end of the spring 203 abuts against the telescopic rod 202. The track wheel 3 is rotatably installed on the free end of the telescopic rod 202, and the bottom end of the sleeve 201 is fixedly connected to the fuselage 1. When the inner diameter of the wellbore shrinks evenly or unevenly, all or part of the telescopic arms 2 will be squeezed. When the spring 203 in one of the telescopic arms 2 is under pressure, it will automatically share the pressure with the springs 203 on the other telescopic arms 2, that is, the three telescopic arms 2 can be at equal or nearly equal extension lengths, that is, the fuselage 1 keeps the wellbore coaxial to the greatest extent. In actual use, the nozzle 7 is driven by a motor to rotate, and the degree of squeezing of the spring 203 is different for different extension lengths of the telescopic arms 2, and the pressure borne by the pressure sensor 204 is also different. By building a controller into the fuselage 1 and collecting real-time data from the pressure sensor 204, the wellbore diameter can be determined in real time, and the distance between the nozzle 7 and the well wall can be obtained. The controller controls the second drive motor 504 to adjust the valve core opening and closing angle in real time, so as to achieve the purpose of real-time regulation of the spraying pressure and flow rate and improve the uniformity of spraying.

[0025] like Figure 2-3As shown, the grouting control valve 5 includes a valve body 501 and a valve core 502, the valve core 502 is rotatably installed in the valve body 501, the top of the valve body 501 is connected to the grouting mechanism 4 and fluid is conducted, the bottom of the valve body 501 is connected to the nozzle 7 and fluid is conducted, the nozzle 7 is rotatably installed on the bottom of the valve body 501, one side of the valve body 501 is connected to the slurry supply pipe 6 and fluid is conducted, and a valve stem 503 is installed in the other side of the valve body 501, and the valve stem 503 is connected to the valve core 50 2 is fixedly connected, a first fluid channel is vertically opened in the valve core 502, the first fluid channel connects the grouting mechanism 4 and the nozzle 7, a second fluid channel is horizontally opened on the side wall of the valve core 502 and is fluid-conducting with the slurry supply pipe 6, the first fluid channel and the second fluid channel are connected to each other, the second fluid channel and the valve stem 503 are coaxially arranged, a second drive motor 504 is installed on the valve body 501, and the second drive motor 504 is coaxially fixedly connected with the valve stem 503.

[0026] like Figure 2-3 As shown, the grouting mechanism 4 includes a fixed frame 401, a reciprocating drive component and a booster cylinder, the reciprocating drive component is fixedly connected to the fixed frame 401, the reciprocating drive component and the booster cylinder are drivingly connected, and the end of the booster cylinder is fluidly connected to the grouting control valve 5; specifically, the reciprocating drive component includes a first drive motor 402, a crank block 403, a connecting rod 404 and a fixing buckle 405, the first drive motor 402 is installed on the fixed frame 401, the crank block 403 is fixedly connected to the output shaft of the first drive motor 402, one end of the connecting rod 404 is connected to the crank block 403 away from the first drive motor One end of the machine 402 is rotatably connected, and the other end of the connecting rod 404 is rotatably connected to the fixing buckle 405; the booster cylinder includes a cylinder barrel 407, a piston 408 and a piston rod 406, the cylinder barrel 407 is fixedly installed on the bottom of the fixing frame 401, the piston 408 is slidingly sealed and fitted in the cylinder barrel 407, one end of the piston rod 406 is fixedly connected to the piston 408, the other end of the piston rod 406 passes through the cylinder barrel 407 and extends into the fixing frame 401, and the fixing buckle 405 is coaxially fastened to the piston rod 406; the bottom end of the cylinder barrel 407 is fluidly connected to the top end of the first fluid channel of the grouting control valve 5.

[0027] like Figure 2 As shown, rod end joint bearings are provided on both ends of the connecting rod 404, one end of the connecting rod 404 is rotatably connected to the crank block 403 through the rod end joint bearing, and the other end of the connecting rod 404 is rotatably connected to the fixing buckle 405 through the rod end joint bearing.

[0028] In actual use, Figure 1As shown, the shotcrete machine is hoisted into the wellbore by a crane, the telescopic arm 2 adopts a structure with a spring to provide elastic force, which can automatically extend when there is no force, and can provide a certain supporting force after being squeezed, and the telescopic arm 2 pushes the track wheel 3 to press on the well wall to ensure that the shotcrete machine can move up and down smoothly; the slurry supply pipe 6 is connected to the slurry supply pump, and the second drive motor 504 can drive the valve core 502 to rotate through the valve stem 503 to control the opening and closing angles of the first fluid channel and the cylinder 407 and the nozzle 7, thereby controlling the pressure and speed of the shotcrete. degree, but the second fluid channel is not affected; the first drive motor 402 rotates to drive the crank block 403 to drive the connecting rod 404, so that the fixing buckle 405 pushes the piston rod 406 and the piston 408 to reciprocate. When the piston 408 moves upward, the slurry is sucked, and when the piston 408 moves downward, the slurry is pushed through the first fluid channel and sprayed from the nozzle 7, thereby increasing the slurry injection pressure. In order to reduce the pressure loss, a one-way valve can be installed on the slurry supply pipe 6, that is, the slurry in the slurry supply pipe 6 can only flow into the grouting control valve 5 and cannot flow in the opposite direction.

[0029] 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 suspended shaft inner wall rapid jet grouting support device, characterized in that: The invention comprises a grouting mechanism (4) and a grouting control valve (5), wherein the grouting control valve (5) is connected to the grouting mechanism (4), and the grouting mechanism (4) and the grouting control valve (5) are fluidly connected, the grouting control valve (5) is fluidly connected to a slurry supply pipe (6), a nozzle (7) is provided on the grouting control valve (5), the outlet end of the nozzle (7) is arranged toward the well wall, and a support structure is connected around the grouting mechanism (4), and the support structure is supported on the well wall.

2. A suspended wellbore inner wall rapid jet grouting support device according to claim 1, characterized in that: The grouting control valve (5) comprises a valve body (501) and a valve core (502), wherein the valve core (502) is rotatably mounted in the valve body (501), the top of the valve body (501) is connected to the grouting mechanism (4) and is fluidly connected, the bottom of the valve body (501) is connected to the nozzle (7) and is fluidly connected, and the nozzle (7) is rotatably mounted on the bottom of the valve body (501), one side of the valve body (501) is connected to the grouting pipe (6) and is fluidly connected, and the valve body (501) is connected to the grouting mechanism (4) and is fluidly connected. 1) is provided with a valve stem (503), the valve stem (503) is fixedly connected to the valve core (502), a first fluid channel is provided through the valve core (502), the first fluid channel connects the grouting mechanism (4) and the nozzle (7), a second fluid channel is provided on the side wall of the valve core (502) and is fluidly connected to the slurry supply pipe (6), the first fluid channel and the second fluid channel are connected to each other, and the second fluid channel and the valve stem (503) are coaxially arranged.

3. A suspended shaft inner wall rapid jet grouting support device according to claim 2, characterized in that: A second drive motor (504) is mounted on the valve body (501), and the second drive motor (504) is coaxially fixedly connected to the valve stem (503).

4. A suspended shaft inner wall rapid jet grouting support device according to claim 1, characterized in that: The grouting mechanism (4) comprises a fixed frame (401), a reciprocating drive component and a boosting cylinder, the reciprocating drive component is fixedly connected to the fixed frame (401), the reciprocating drive component and the boosting cylinder are drivingly connected, and the end of the boosting cylinder is fluidly connected to a grouting control valve (5).

5. A suspended shaft inner wall rapid jet grouting support device according to claim 4, characterized in that: The reciprocating drive component comprises a first drive motor (402), a crank block (403), a connecting rod (404) and a fixing buckle (405); the first drive motor (402) is mounted on the fixing frame (401); the crank block (403) is fixedly connected to the output shaft of the first drive motor (402); one end of the connecting rod (404) is rotatably connected to an end of the crank block (403) away from the first drive motor (402); and the other end of the connecting rod (404) is rotatably connected to the fixing buckle (405).

6. A suspended shaft inner wall rapid jet grouting support device according to claim 5, characterized in that: Rod end joint bearings are provided at both ends of the connecting rod (404); one end of the connecting rod (404) is rotatably connected to the crank block (403) via the rod end joint bearing, and the other end of the connecting rod (404) is rotatably connected to the fixing buckle (405) via the rod end joint bearing.

7. A suspended shaft inner wall rapid jet grouting support device according to claim 5, characterized in that: The booster cylinder comprises a cylinder barrel (407), a piston (408) and a piston rod (406); the cylinder barrel (407) is fixedly mounted on the bottom of the fixing frame (401); the piston (408) is slidingly and sealingly fitted in the cylinder barrel (407); one end of the piston rod (406) is fixedly connected to the piston (408); the other end of the piston rod (406) passes through the cylinder barrel (407) and extends into the fixing frame (401); the fixing buckle (405) is coaxially buckled on the piston rod (406); the bottom end of the cylinder barrel (407) is fluidically connected to the grouting control valve (5).

8. The suspended shaft inner wall rapid jet grouting support device according to claim 1, characterized in that: It also includes a machine body (1), the grouting mechanism (4) and the grouting control valve (5) are both installed in the machine body (1), one end of the support structure is fixedly connected to the side wall of the machine body (1), and the other end of the support structure is supported on the well wall.

9. A suspended shaft inner wall rapid jet grouting support device according to claim 8, characterized in that: The support structure comprises a telescopic arm (2) and a track wheel (3); one end of the telescopic arm (2) is fixedly connected to the fuselage (1), and the track wheel (3) is mounted on the other end of the telescopic arm (2); the telescopic arm (2) comprises a sleeve (201), a telescopic rod (202) and a spring (203); the telescopic rod (202) is slidably fitted in the sleeve (201), the spring (203) is mounted in the sleeve (201), a pressure sensor (204) is mounted in the bottom of the sleeve (201), one end of the spring (203) abuts against the pressure sensor (204), and the other end of the spring (203) abuts against the telescopic rod (202); the track wheel (3) is rotatably mounted on the free end of the telescopic rod (202), and the bottom end of the sleeve (201) is fixedly connected to the fuselage (1).

10. A suspended shaft inner wall rapid jet grouting support device according to claim 8, characterized in that: A support frame (8) is fixedly connected to the top of the fuselage (1), a fixing ring is fixedly connected to the top of the support frame (8), and the slurry supply pipe (6) passes through the fixing ring.

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