Slurry return control valve

Abstract

The utility model discloses a slurry return control valve which comprises an upper connector body and a lower connector body, the upper connector body and the lower connector body are provided with a cable channel, a cavity and a communication opening, the cavity is communicated with the cable channel, an electric drive assembly is arranged in the cavity, and the output end of the electric drive assembly is connected with a guide plate. A communication opening is formed in the upper connector body, a guide plate is arranged in the communication opening, one side face of the guide plate is connected with a sliding sealing plate, the sliding sealing plate is arranged at the communication opening, and the size of the communication opening is regulated and controlled through movement of the sliding sealing plate. The electric driving assembly is installed in the cavity and is controlled to drive the guide plate and the sliding sealing plate to move after being powered on, then the communicating opening of the upper connector body is opened and closed, and the problems that a hydraulic oil system of an existing slurry return valve is prone to being polluted in the using process, the hydraulic system breaks down, and normal work of a drilling tool is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of geological disaster repair and engineering construction, in particular to a slurry return control valve. Background Art

[0002] The underground slurry return valve is a structural unit used in high-pressure rotary jet drilling tools. This structural unit is generally located in the drill bit part of the high-pressure rotary jet drilling tools, and is at the end of the drill tool below the ground during construction. Under construction, the valve is in the cutting medium underground. Its main function is to control the discharge of excess cutting medium underground by controlling the size of the opening of the valve during high-pressure rotary jet construction, thereby avoiding the continuous accumulation of cutting medium in the ground and causing the underground pressure to continue to increase, thereby achieving control of the underground pressure during construction.

[0003] A Chinese invention patent with publication number CN106836185B discloses a small-section porous tube jet grouting drilling tool, which drives the action of a double-piston rod oil cylinder by controlling the inlet and return oil circuits of a first hydraulic oil channel and a second hydraulic oil channel, and then drives a slurry suction port valve to adjust the size of the slurry suction port. However, during use, the first hydraulic oil channel and the second hydraulic oil channel need to be connected through a dedicated joint when flowing between drill rods, and due to the external influence of the online construction environment, external pollutants are easily adhered to the docking area of ​​the joint, so that when two adjacent drill rods are connected, the pollution will be brought into the hydraulic system, causing a hydraulic system failure. Utility Model Content

[0004] The utility model aims to make up for the deficiencies of the prior art and provides a slurry return control valve.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A return slurry control valve comprises an upper joint body, a communication opening and a return slurry channel are respectively provided on the side and one end of the upper joint body, and one side of the communication opening is communicated with the interior of the return slurry channel, and the other end of the upper joint body is connected to a lower joint body; both ends of the upper joint body and both ends of the lower joint body are respectively provided with a first through hole and a second through hole, and one end of the first through hole is communicated with one end of the second through hole to form a cable channel;

[0007] The first positioning groove and the second positioning groove are respectively provided at the joint of the upper joint body and the lower joint body, one end of the first positioning groove is connected with one end of the second positioning groove to form a chamber, the chamber is connected with the cable channel, an electric drive component is provided in the chamber, the output end of the electric drive component passes through the chamber, the output end of the electric drive component is connected with a guide plate, one side of the guide plate is connected with a sliding sealing plate, the sliding sealing plate is provided at the connecting opening, and the size of the connecting opening is regulated by moving the sliding sealing plate.

[0008] Furthermore, a mud discharge nozzle is arranged inside the return slurry channel; a mud discharge water channel is opened at one end of the upper joint body, and one end of the mud discharge water channel is connected to the mud discharge nozzle to prevent mud blockage.

[0009] Furthermore, both ends of the upper joint body and both ends of the lower joint body are respectively provided with a third through hole and a fourth through hole, and one end of the third through hole is connected with one end of the fourth through hole to form a high-pressure mud channel.

[0010] Furthermore, a fifth through hole and a sixth through hole are respectively formed at both ends of the upper joint body and both ends of the lower joint body, and one end of the fifth through hole is connected with one end of the sixth through hole to form a cutting water channel.

[0011] Furthermore, the electric drive component is an electric push rod, which is installed inside the chamber, and the moving end of the electric push rod passes through the chamber, and the moving end of the electric push rod is connected to the guide plate.

[0012] Furthermore, a sealing assembly is provided between the moving end of the electric push rod and the upper joint body to prevent water from entering the chamber.

[0013] Furthermore, a sealing structure is provided between the upper joint body and the lower joint body to prevent water from entering the chamber.

[0014] Furthermore, a guide rail is connected to the side surface of the upper joint body, an inner wall of the guide rail is slidably connected to the guide plate, and an inner wall of the guide rail is slidably connected to the sliding sealing plate.

[0015] Furthermore, a protective cover is connected to one side of the guide rail, a second opening is provided on the surface of the protective cover, an inner side of the second opening is connected to the connecting opening, and the inner side of the protective cover is slidably connected to the outer wall of the sliding cover plate.

[0016] Compared with the prior art, the return slurry control valve has the following beneficial effects:

[0017] 1. The utility model opens a chamber at the joint of the upper joint body and the lower joint body, and connects the chamber with the cable channel, and then installs an electric drive component in the chamber. After power is turned on, the electric drive component is controlled to drive the guide plate and the sliding sealing plate to move, and then the connecting opening of the upper joint body is opened and closed, thereby solving the problem that the hydraulic oil system of the existing return slurry valve is easily contaminated during use, causing hydraulic system failure and affecting the normal operation of the drilling tool.

[0018] 2. The chamber of the utility model is located at the joint of the upper joint body and the lower joint body, and the upper joint body and the lower joint body are connected by bolts, so that it is convenient to separate the upper joint body and the lower joint body when necessary, open the chamber, and perform maintenance and replacement on the electric push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the upper joint body in the utility model;

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the anti-slip cover in the utility model;

[0022] Figure 4 This is a connection diagram of the cable channel in the utility model;

[0023] Figure 5 This is a connection diagram of the medium and high pressure mud channel of the utility model;

[0024] Figure 6 This is a connection diagram of the second positioning groove in the utility model;

[0025] Figure 7 This is the fifth through hole connection diagram in the utility model.

[0026] In the figure: 1. upper joint body; 2. lower joint body; 3. return slurry channel; 4. guide plate; 5. sliding sealing plate; 6. first through hole; 601. first connecting hole; 602. second connecting hole; 603. third connecting hole; 7. second through hole; 8. third through hole; 9. fourth through hole; 10. first positioning groove; 11. second positioning groove; 12. mud water nozzle; 13. mud water channel; 14. fifth through hole; 15. sixth through hole; 16. electric push rod; 17. sealing assembly; 18. guide rail; 19. protective cover. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figure 1-7 As shown, the utility model provides a technical solution: a return slurry control valve, comprising an upper joint body 1, a connecting opening and a return slurry channel 3 are respectively provided on the side and one end of the upper joint body 1, and the connecting opening is connected to the interior of the return slurry channel 3, and the other end of the upper joint body 1 is connected to the lower joint body 2; the two ends of the upper joint body 1 and the two ends of the lower joint body 2 are respectively provided with a first through hole 6 and a second through hole 7, one end of the first through hole 6 is connected with one end of the second through hole 7 to form a cable channel; the lower joint body 2 and the upper joint body 1 are respectively provided with a first positioning groove 10 and a second positioning groove 11 at the joints with each other, one end of the first positioning groove 10 is connected with one end of the second positioning groove 11 to form a chamber, the chamber is connected with the cable channel, an electric drive component is provided in the chamber, the output end of the electric drive component passes through the chamber, the output end of the electric drive component is connected to a guide plate 4, one side of the guide plate 4 is connected to a sliding sealing plate 5, the sliding sealing plate 5 is provided at the connecting opening, and the size of the connecting opening is regulated by moving the sliding sealing plate 5.

[0029] When in use, both ends of the upper joint body 1 and the lower joint body 2 that are far away from each other are provided with connecting bolts for connecting with adjacent drilling tools. A first connecting hole 601 is provided at one end of the upper joint body 1, and a second connecting hole 602 is provided at the other end of the upper joint. The first connecting hole 601 and the second connecting hole 602 are connected through a third connecting hole 603. The first connecting hole 601, the second connecting hole 602 and the third connecting hole 603 together form a first through hole 6. A through second through hole 7 is provided at both ends of the lower joint body 2. After the upper joint body 1 and the lower joint body 2 are fixed by bolts, the second connecting hole 602 and the second through hole 7 are connected and connected, and the second through hole 7 is connected to the chamber, and a cable channel is formed through the first connecting hole 601, the second connecting hole 602, the third connecting hole 603 and the second through hole 7; the end where the upper joint body 1 and the lower joint body 2 are connected to each other A first positioning groove 10 and a second positioning groove 11 are respectively provided, and the first positioning groove 10 and the second positioning groove 11 are connected to each other to form a chamber. The depth of the first positioning groove 10 on the upper joint body 1 is greater than the depth of the second positioning groove 11. Preferably, the first positioning groove 10 is twice the depth of the second positioning groove 11, and the second positioning groove 11 is connected to the second through hole 7; the cable is introduced into the electric drive component in the chamber through the cable channel, so that the electric drive component drives the guide plate 4 to move along a straight line, and the guide plate 4 further drives the sliding cover plate 5 to move, so that the sliding cover plate 5 blocks the connecting opening, and then the size of the opening and closing of the connecting opening is regulated, so that the drive control can be achieved by only connecting the wires through the joint, avoiding the need for hydraulic oil drive for traditional hydraulic components, which makes it more complicated to transport hydraulic oil in long-distance segments and prone to failure.

[0030] A mud discharge nozzle 12 is arranged inside the return slurry channel 3; a mud discharge water channel 13 is opened at one end of the upper joint body 1, and one end of the mud discharge water channel 13 is connected with one end of the mud discharge water nozzle 12 to prevent blockage; when in use, the mud discharge water channel 13 is connected with the mud discharge water nozzle 12, so that the mud discharge water nozzle 12 sprays high-pressure water to assist the mud to be discharged and prevent the return slurry channel 3 from being blocked, and a sealing plate is arranged on one side of the mud discharge water nozzle 12, and the sealing plate is located at the connecting opening to seal part of the connecting opening, and the difference between the length of the sealing plate and the length of the connecting opening is adapted to the length of the sliding sealing plate 5, so as to facilitate the effective length of the connecting opening to be shielded and adjusted to adjust the size of the opening and closing.

[0031] A third through hole 8 and a fourth through hole 9 are respectively provided at both ends of the upper joint body 1 and at both ends of the lower joint body 2, and one end of the third through hole 8 is connected with one end of the fourth through hole 9 to form a high-pressure mud channel; a fifth through hole 14 and a sixth through hole 15 are respectively provided at both ends of the upper joint body 1 and at both ends of the lower joint body 2, and one end of the fifth through hole 14 is connected with one end of the sixth through hole 15 to form a cutting water channel; when in use, the cutting water channel, the cable channel and the cutting water channel in the device are respectively connected to the connected drilling tools for conveying cutting water and mud materials.

[0032] The electric drive component is an electric push rod 16, which is installed inside the chamber. The moving end of the electric push rod 16 passes through the chamber, and the moving end of the electric push rod 16 is connected to the guide plate 4. The drive of the electric push rod 16 is provided with an independent control pipeline, which can be controlled in both wired and wireless modes and can be applied to different working conditions.

[0033] A sealing assembly 17 is provided between the moving end of the electric push rod 16 and the upper joint body 1 to prevent water from entering the chamber; the sealing assembly 17 can adopt a high-pressure sealing ring to ensure that the interior of the chamber where the electric push rod 16 is installed does not enter water under a high pressure of 6MPa, and a sealing structure is provided between the upper joint body 1 and the lower joint body 2 to prevent water from entering the chamber; the sealing structure can adopt an O-ring to ensure that the interior of the installation chamber of the electric push rod 16 does not enter water under a high pressure of 6MPa; a high-pressure seal is also provided at the joint of the channel between the upper joint body 1 and the lower joint body 2 to avoid slurry leakage between the channels and improve the sealing of the channels; when in use, the electric push rod 1 There are two 6, which increase the thrust and pull force, and can still have a good opening and closing effect under higher underground pressure conditions. The two electric push rods 16 are the same, which is convenient for potential maintenance, replacement and other process processing in the later stage, and its stroke is greater than 75mm, the driving force is greater than 2000N, the maximum operating speed is 15mm / s, the protection level is not less than IP66, the working voltage is not higher than 24V, and it has two parallel synchronous operation functions, built-in limit switches, and built-in Hall encoders can be used for position feedback. The electric push rod 16 is connected to the controller on the ground, and the displacement of the electric push rod 16 in the ground is intelligently controlled, thereby synchronously affecting the opening and closing size of the gate.

[0034] A guide rail 18 is connected to the side of the upper joint body 1, and the inner wall of the guide rail 18 is slidably connected to the guide plate 4, and the inner wall of the guide rail 18 is slidably connected to the sliding cover plate 5; when in use, the guide rail 18 is arranged at the connecting opening and is connected to the upper joint body 1 by bolts. The cross-sectional shape of the guide rail 18 is L-shaped, which is used to limit the guide plate 4 and the sliding cover plate 5, thereby improving the stability of the guide plate 4 and the sliding cover plate 5 during linear motion.

[0035] A protective cover 19 is connected to one side of the guide rail 18, and a second opening is provided on the surface of the protective cover 19. The inner side of the second opening is connected to the connecting opening, and the inner side of the protective cover 19 is slidably connected to the outer wall of the sliding sealing plate 5. When in use, the second opening is two rectangular holes. The shape of the protective cover 19 is arc-shaped, and the size and shape of the inner wall are adapted to the shape and size of the outer wall of the sliding sealing plate 5, and the rectangular hole is connected to the return slurry channel 3. The size of the rectangular hole blocked is changed by the movement of the sliding sealing plate 5, thereby affecting the effective area passing through, thereby realizing the control of the ground pressure.

Claims

1. A return slurry control valve, comprising an upper joint body (1), wherein a communication opening and a return slurry channel (3) are respectively provided on a side surface and one end of the upper joint body (1), and one side of the communication opening is communicated with the interior of the return slurry channel (3), and the other end of the upper joint body (1) is connected to a lower joint body (2); characterized in that: A first through hole (6) and a second through hole (7) are respectively formed at both ends of the upper connector body (1) and the lower connector body (2); one end of the first through hole (6) is connected to one end of the second through hole (7) to form a cable channel; A first positioning groove (10) and a second positioning groove (11) are respectively provided at the joint between the upper joint body (1) and the lower joint body (2); one end of the first positioning groove (10) is connected with one end of the second positioning groove (11) to form a chamber; the chamber is connected with the cable channel; an electric drive component is provided in the chamber; the output end of the electric drive component passes through the chamber; the output end of the electric drive component is connected to a guide plate (4); one side of the guide plate (4) is connected to a sliding sealing plate (5); the sliding sealing plate (5) is provided at the connecting opening; the size of the connecting opening is regulated by moving the sliding sealing plate (5).

2. The slurry return control valve according to claim 1, characterized in that: A mud discharge nozzle (12) is arranged inside the return slurry channel (3); a mud discharge channel (13) is opened at one end of the upper joint body (1), and one end of the mud discharge channel (13) is connected to the mud discharge nozzle (12) to prevent mud blockage.

3. The slurry return control valve according to claim 1, characterized in that: A third through hole (8) and a fourth through hole (9) are respectively provided at both ends of the upper joint body (1) and the lower joint body (2); one end of the third through hole (8) is connected to one end of the fourth through hole (9) to form a high-pressure mud channel.

4. The slurry return control valve according to claim 1, characterized in that: A fifth through hole (14) and a sixth through hole (15) are respectively provided at both ends of the upper joint body (1) and the lower joint body (2); one end of the fifth through hole (14) is connected to one end of the sixth through hole (15) to form a cutting water channel.

5. The slurry return control valve according to claim 1, characterized in that: The electric drive component is an electric push rod (16), which is installed inside the chamber. The moving end of the electric push rod (16) passes through the chamber, and the moving end of the electric push rod (16) is connected to the guide plate (4).

6. The slurry return control valve according to claim 5, characterized in that: A sealing assembly (17) is provided between the moving end of the electric push rod (16) and the upper joint body (1) to prevent water from entering the chamber.

7. The slurry return control valve according to claim 1, characterized in that: A sealing structure is provided between the upper joint body (1) and the lower joint body (2) to prevent water from entering the chamber.

8. The slurry return control valve according to claim 1, characterized in that: The side surface of the upper joint body (1) is connected to a guide rail (18), the inner wall of the guide rail (18) is slidably connected to the guide plate (4), and the inner wall of the guide rail (18) is slidably connected to the sliding sealing plate (5).

9. The slurry return control valve according to claim 8, characterized in that: A protective cover (19) is connected to one side of the guide rail (18), a second opening is provided on the surface of the protective cover (19), the inner side of the second opening is connected to the connecting opening, and the inner side of the protective cover (19) is slidably connected to the outer wall of the sliding cover plate (5).

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