T-shaped high-pressure grouting orifice device for ground area grouting

Abstract

The invention discloses a ground area grouting T-shaped high-pressure grouting orifice device, and belongs to the technical field of grouting, the ground area grouting T-shaped high-pressure grouting orifice device comprises a T-shaped high-pressure assembly and a grouting drilling sleeve assembly, the left upper end of the T-shaped high-pressure assembly is connected with a first transverse pipe, the first transverse pipe is connected with a high-pressure plugging device, the right upper end of the T-shaped high-pressure assembly is connected with a second transverse pipe, the second transverse pipe is connected with a high-pressure grout inlet pipe, and the grouting drilling sleeve assembly is connected with a grouting drilling sleeve. The lower end of the T-shaped high-pressure assembly is connected with a grouting drilling sleeve assembly through a vertical pipe, grout enters the T-shaped high-pressure assembly through a high-pressure grout inlet pipe, a rolling ball in the T-shaped high-pressure assembly is pushed to move to the end point of a first transverse pipe, then the grout enters the grouting drilling sleeve assembly through a second transverse pipe, the T-shaped high-pressure assembly and the vertical pipe, and the grouting drilling sleeve assembly is driven to rotate. When grouting is stopped or overhauled, the high-pressure grout inlet pipe has no pressure, the pressure in the drilling sleeve pushes the rolling ball to move to the end point of the second transverse pipe, a check valve is formed, and therefore grout backflow is prevented, and the safety risk of dismantling the grouting pipe is eliminated.

Description

Technical Field

[0001] The invention belongs to the technical field of grouting, in particular to a T-shaped high-pressure grouting orifice device for grouting in a ground area. Background Art

[0002] At present, for mining operations threatened by limestone bottom water pressure, relatively mature ground advance area grouting treatment technology is often used to treat limestone water pressure in advance. The purpose of grouting engineering is to form a waterproof and reinforced barrier by injecting specific materials, such as cement slurry, fly ash slurry, etc., to prevent groundwater infiltration and surface soil settlement. In ground advance area grouting treatment, horizontal directional drilling technology is generally used to drill and explore the limestone layer. After the drilling and exploration, a ground grouting machine is used to perform high-pressure grouting on the limestone layer to improve the physical and mechanical properties of the limestone through replacement, filling, extrusion, etc.

[0003] In horizontal directional drilling, 1+N multi-branch hole combination is often used, so the surface casing needs to be large-diameter (>φ177mm) oil casing; and the ground high-pressure grouting machine grouting pipeline is often a small-diameter (<φ89mm) high-pressure grouting pipe; there are currently two main ways to connect the drilling casing and the grouting pipeline, one is to use a reducer for direct connection, and the other is to use a reducer + control valve connection. However, when the grouting machine stops unplanned (failure, power outage), it is necessary to carry out pressure maintenance. Since the slurry in the drilling casing is in a high-pressure state (>3Mpa), and due to the precipitation of the slurry, it is easy to cause the control valve to be not closed tightly, the slurry will instantly flow back, and even cause safety accidents for the operators, which poses serious safety hazards. Summary of the invention

[0004] In order to overcome the defects of safety problems in the prior art of pipeline pressure maintenance, the present invention provides a T-shaped high-pressure grouting orifice device for ground area grouting.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a T-shaped high-pressure grouting orifice device for grouting in a ground area, comprising a T-shaped high-pressure assembly and a grouting drilling casing assembly, the upper left end of the T-shaped high-pressure assembly is connected to a first horizontal pipe, the first horizontal pipe is connected to a high-pressure plugger, the upper right end of the T-shaped high-pressure assembly is connected to a second horizontal pipe, the second horizontal pipe is connected to a high-pressure slurry inlet pipe, the lower end of the T-shaped high-pressure assembly is connected to the grouting drilling casing assembly through a vertical pipe, the T-shaped high-pressure assembly comprises a horizontal circular tube and a vertical circular tube, the horizontal circular tube and the vertical circular tube are vertically connected, a thin horizontal axis is provided at the connection between the horizontal circular tube and the vertical circular tube, and a rolling ball is provided in the horizontal circular tube.

[0006] As a further improvement of the present invention, the upper surface of the thin horizontal axis and the lower surface of the inner wall of the horizontal circular tube are in a straight line.

[0007] As a further improvement of the present invention, the ratio of the length of the horizontal circular tube to the diameter of the ball is 5 times, the ratio of the inner diameter of the horizontal circular tube to the diameter of the ball is 1.1 times, and the two ends of the T-shaped high-pressure assembly are rounded with a curvature radius of 100.

[0008] As a further improvement of the present invention, the T-shaped high-pressure assembly is connected to the first horizontal pipe, the second horizontal pipe and the vertical pipe by threaded connection, U-shaped card connection or flange connection; the grouting drilling casing assembly is connected to the vertical pipe by threaded connection, U-shaped card connection or flange connection.

[0009] As a further improvement of the present invention, the grouting drilling casing assembly comprises a casing short cap installed on the drilling casing, and a grouting pipe joint is provided on the casing short cap.

[0010] As a further improvement of the present invention, a pressure observation gauge tube is provided on the short cap of the casing, and a pressure observation gauge is installed on the pressure observation gauge tube.

[0011] As a further improvement of the present invention, the short cap of the casing is a cylinder, one end of the short cap of the casing is an external spiral thread, the other end of the short cap of the casing is a groove seal, a pressure observation gauge tube is arranged on the groove seal, a pressure observation gauge is installed on the pressure observation gauge tube, a slurry inlet is arranged on the short cap of the casing, and the external spiral thread of the short cap of the casing matches the thread of the drilling casing.

[0012] As a further improvement of the present invention, the concave arc of the groove seal is 1 / 3 of the diameter of the short cap of the sleeve.

[0013] It can be seen from the above technical scheme that the beneficial effects of the present invention are as follows: in this scheme, the slurry enters the T-shaped high-pressure assembly through the high-pressure slurry inlet pipe, pushing the ball in the T-shaped high-pressure assembly to move to the end point of the first horizontal pipe, and then the slurry enters the grouting drilling casing assembly through the second horizontal pipe, the T-shaped high-pressure assembly and the vertical pipe, and then enters the drilling casing to grout the formation. When the grouting stops or is overhauled, the high-pressure slurry inlet pipe has no pressure, and the pressure in the drilling casing pushes the ball to move to the end point of the second horizontal pipe to form a check valve. The movement of the ball replaces the traditional valve function, eliminating the blockage and damage of the valve caused by slurry precipitation during grouting, thereby preventing the slurry from flowing back and eliminating the safety risks of removing the grouting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of a T-shaped high-pressure grouting orifice device for ground area grouting according to the present invention.

[0016] Figure 2 It is a structural schematic diagram of the T-shaped high-pressure assembly of the present invention.

[0017] Figure 3 It is a schematic structural diagram of the grouting drilling casing assembly of the present invention.

[0018] In the figure: 1. T-shaped high-pressure assembly; 2. Grouting drilling casing assembly; 3. First horizontal pipe; 4. Second horizontal pipe; 5. Vertical pipe; 6. Pressure observation gauge; 7. Horizontal circular pipe; 8. Vertical circular pipe; 9. Thin horizontal axis; 10. Rolling ball; 11. Casing short cap; 12. Grouting pipe joint; 13. High-pressure plugger; 14. High-pressure slurry inlet pipe; 15. Pressure observation gauge pipe; 16. Groove seal. DETAILED DESCRIPTION

[0019] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0020] like Figure 1 As shown, the present invention discloses a T-shaped high-pressure grouting orifice device for grouting in a ground area, comprising a T-shaped high-pressure assembly 1 and a grouting drilling casing assembly 2, the upper left end of the T-shaped high-pressure assembly 1 is connected to a first transverse pipe 3, the first transverse pipe 3 is connected to a high-pressure plugger 13, the upper right end of the T-shaped high-pressure assembly 1 is connected to a second transverse pipe 4, the second transverse pipe 4 is connected to a high-pressure slurry inlet pipe 14, and the lower end of the T-shaped high-pressure assembly 1 is connected to the grouting drilling casing assembly 2 via a vertical pipe 5.

[0021] Reference Figure 2 The T-shaped high-pressure assembly 1 includes a horizontal circular tube 7 and a vertical circular tube 8, which are vertically connected. A thin horizontal axis 9 is provided at the connection between the horizontal circular tube 7 and the vertical circular tube 8. A rolling ball 10 is provided in the horizontal circular tube 7, and the upper surface of the thin horizontal axis 9 is in a straight line with the lower surface of the inner wall of the horizontal circular tube 7.

[0022] Among them, the ratio of the length of the horizontal circular tube 7 to the diameter of the ball 10 is 5 times, the ratio of the inner diameter of the horizontal circular tube 7 to the diameter of the ball 10 is 1.1 times, and the two ends of the T-shaped high-pressure assembly 1 are rounded with a curvature radius of 100.

[0023] The connection mode between the T-shaped high-pressure assembly 1 and the first transverse pipe 3, the second transverse pipe 4 and the vertical pipe 5 is threaded connection, U-shaped card connection or flange connection; the connection mode between the grouting drilling casing assembly 2 and the vertical pipe 5 is threaded connection, U-shaped card connection or flange connection; During grouting, the slurry enters the T-shaped high-pressure assembly 1 through the high-pressure slurry inlet pipe 14, pushing the ball 10 in the T-shaped high-pressure assembly 1 to move to the end point of the first horizontal pipe 3, and then the slurry enters the grouting drilling casing assembly 2 through the second horizontal pipe 4, the T-shaped high-pressure assembly 1 and the vertical pipe 5, and then enters the drilling casing to grout the formation. When the grouting stops or is overhauled, the high-pressure slurry inlet pipe 14 is pressure-free, and the pressure in the drilling casing pushes the ball 10 to move to the end point of the second horizontal pipe 4 to form a check valve. The movement of the ball replaces the traditional valve function, eliminating the blockage and damage of the valve caused by slurry precipitation during grouting, thereby preventing the slurry from flowing back and eliminating the safety risks of removing the grouting pipe.

[0024] Reference Figure 3 The grouting drilling casing assembly 2 includes a casing short cap 11 installed on the drilling casing, and a grouting pipe joint 12 is provided on the casing short cap 11. A pressure observation gauge tube 15 is provided on the casing short cap 11, and a pressure observation gauge 6 is installed on the pressure observation gauge tube 15. The casing short cap 11 is a cylinder, one end of the casing short cap 11 is an external spiral thread, and the other end of the casing short cap 11 is a groove seal 16. The pressure observation gauge tube 15 is arranged on the groove seal 16, and the pressure observation gauge 6 is installed on the pressure observation gauge tube 15. The casing short cap 11 is provided with a slurry inlet, and the external spiral thread of the casing short cap 11 matches the drilling casing thread, and the concave arc of the groove seal 16 is 1 / 3 of the diameter of the casing short cap 11.

[0025] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A T-shaped high-pressure grouting orifice device for ground area grouting, characterized in that: The invention comprises a T-shaped high-pressure assembly (1) and a grouting drilling casing assembly (2), wherein the upper left end of the T-shaped high-pressure assembly (1) is connected to a first transverse pipe (3), the first transverse pipe (3) is connected to a high-pressure plugging device (13), the upper right end of the T-shaped high-pressure assembly (1) is connected to a second transverse pipe (4), the second transverse pipe (4) is connected to a high-pressure slurry inlet pipe (14), the lower end of the T-shaped high-pressure assembly (1) is connected to the grouting drilling casing assembly (2) via a vertical pipe (5), the T-shaped high-pressure assembly (1) comprises a transverse circular pipe (7) and a vertical circular pipe (8), the transverse circular pipe (7) and the vertical circular pipe (8) are vertically connected, a thin transverse shaft (9) is provided at the connection between the transverse circular pipe (7) and the vertical circular pipe (8), and a rolling ball (10) is provided in the transverse circular pipe (7).

2. A T-shaped high-pressure grouting orifice device for ground area grouting according to claim 1, characterized in that: The upper surface of the thin horizontal axis (9) and the lower surface of the inner wall of the horizontal circular tube (7) are in a straight line.

3. A T-shaped high-pressure grouting orifice device for ground area grouting according to claim 2, characterized in that: The ratio of the length of the horizontal circular tube (7) to the diameter of the ball (10) is 5 times, the ratio of the inner diameter of the horizontal circular tube (7) to the diameter of the ball (10) is 1.1 times, and both ends of the T-shaped high-pressure assembly (1) are rounded, and the radius of curvature is 100.

4. A T-shaped high-pressure grouting orifice device for ground area grouting according to claim 3, characterized in that: The T-shaped high-pressure assembly (1) is connected to the first transverse pipe (3), the second transverse pipe (4) and the vertical pipe (5) by threaded connection, U-shaped clamp connection or flange connection; the grouting drilling casing assembly (2) is connected to the vertical pipe (5) by threaded connection, U-shaped clamp connection or flange connection.

5. A T-shaped high-pressure grouting orifice device for ground area grouting according to claim 4, characterized in that: The grouting drilling casing assembly (2) comprises a casing short cap (11) mounted on the drilling casing, and a grouting pipe joint (12) is provided on the casing short cap (11).

6. A T-shaped high-pressure grouting orifice device for ground area grouting according to claim 5, characterized in that: A pressure observation gauge tube (15) is provided on the casing short cap (11), and a pressure observation gauge (6) is installed on the pressure observation gauge tube (15).

7. A T-shaped high-pressure grouting orifice device for ground area grouting according to claim 6, characterized in that: The casing short cap (11) is a cylinder, one end of the casing short cap (11) is an external spiral thread, the other end of the casing short cap (11) is a groove seal (16), a pressure observation gauge tube (15) is arranged on the groove seal (16), a pressure observation gauge (6) is installed on the pressure observation gauge tube (15), a slurry inlet is arranged on the casing short cap (11), and the external spiral thread of the casing short cap (11) matches the drilling casing thread.

8. A T-shaped high-pressure grouting orifice device for ground area grouting according to claim 7, characterized in that: The concave arc of the groove seal (16) is 1 / 3 of the diameter of the sleeve short cap (11).

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