Mine underground high-water-pressure drilling and grouting dual-purpose orifice safety device

Abstract

A dual-purpose hole opening safety device for mine underground high-water-pressure drilling and grouting comprises a sleeve pipe, a pressure sensor, a pressure sensor, a pressure sensor, a pressure sensor and a pressure sensor, the sealing unit is connected to one end of the casing pipe, and the drill rod can retreat into the sealing unit from the casing pipe; the sealing unit communicates with the side face of the casing pipe, a first sealing piece is arranged in the sealing unit, the diameter of the first sealing piece is larger than that of the drill rod and smaller than that of the casing pipe, and the first sealing piece can enter the casing pipe under the action of the propelling piece; the pressure relief unit communicates with the side face of the sleeve and is located on the side, away from the sealing unit, of the sealing unit, and a second sealing piece and a pressure relief pipe are arranged in the pressure relief unit; the second sealing piece can block or open a communication port of the pressure relief unit and the sleeve under the action of the propelling piece; the pressure relief pipe is used for discharging objects flowing into the pressure relief unit from the sleeve. According to the device, construction at the bottom of a direct punching drill hole is avoided, and the device is designed on the lateral opening and closing sealing unit and the pressure relief unit, so that the operation safety of personnel is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of underground drilling and grouting equipment, in particular to an orifice safety device for high-pressure drilling and grouting in underground mines. Background Art

[0002] In the construction of underground mine exploration and drainage, the water volume and water pressure ahead are unknown, which brings uncertainty to the drilling construction. If a strong aquifer is encountered during the drilling process, the drill bit will be blown out under high water pressure. The traditional blowout prevention device only installs a gate valve on the orifice casing. When the water pressure is high, the construction personnel cannot close the valve in time to stop the water, or the valve is too long to close in time, causing a water inrush accident, which brings safety hazards to the exploration and drainage construction. Utility Model Content

[0003] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a dual-purpose hole safety device for high-pressure drilling and grouting in underground mines.

[0004] The technical solution of this utility model is as follows:

[0005] A dual-purpose hole safety device for high-pressure drilling and grouting in underground mines, comprising:

[0006] a casing, which can accommodate a drill pipe;

[0007] The sealing unit is connected to one end of the casing, and the drill pipe can be withdrawn from the casing into the sealing unit. The sealing unit is provided with a sealing member to clamp the working drill pipe;

[0008] The sealing unit is connected to the side of the casing and is provided with a first sealing member. The diameter of the first sealing member is larger than the diameter of the drill pipe and smaller than the diameter of the casing. The first sealing member can enter the casing under the action of the pushing member.

[0009] A pressure relief unit, connected to the side of the casing, used to release water in the casing;

[0010] Grouting valve, installed on the top of the casing or closed unit.

[0011] By changing the position of the sealing unit from the front to the side, when encountering a strong aquifer, the thruster can be controlled from the side to push the first sealing member into the casing. The first sealing member is blocked at the opening position of the sealing unit under the action of water flow, avoiding construction at the bottom of the direct-entry borehole, thereby ensuring the safety of the water exploration and release construction personnel.

[0012] The released water can flow out from the pressure relief unit. After the water is released, or when the water pressure is high and the hole needs to be plugged, the grouting pipe can be connected to the grouting valve to inject grout into the casing.

[0013] Specifically, the pressure relief unit is located on a side of the closing unit away from the sealing unit, and is provided with a second closing member and a pressure relief pipe;

[0014] The second sealing member can block or open the communication port between the pressure relief unit and the sleeve under the action of the pushing member;

[0015] The pressure relief pipe is used to discharge objects that flow into the pressure relief unit from the casing.

[0016] When the water pressure is low, the released water continuously flows out from the pressure relief pipe of the pressure relief unit. When the water pressure is high, especially when it is detected that the water pressure remains at a high value for a long time, water replenishment may exist. The first closure member and the second closure member can be closed to block the connecting ports between the closure unit and the pressure relief unit and the casing to analyze the water accumulation situation.

[0017] As one embodiment, the pressure relief unit includes a second side pipe and a pressure relief pipe;

[0018] The second sealing member moves in a straight line in the second side tube, and the opening at the connection between the second side tube and the sleeve is smaller than the second sealing member;

[0019] The pressure relief pipe is connected to the side wall of the second side pipe obliquely downward.

[0020] The second closing member can be a second steel ball. A second screw-in member is threadedly connected to the lower portion of the second side tube. The top of the second screw-in member is connected to the second spring and the second sealing plate. The second steel ball is located on the top of the second sealing plate.

[0021] The diameter of the second steel ball is larger than the diameter of the pressure relief pipe to prevent the second steel ball from rolling out of the pressure relief pipe.

[0022] In order to ensure the sealing performance between the second steel ball and the sleeve, the second side tube is vertically connected to the sleeve.

[0023] For the sealing unit, the first sealing member is a first steel ball. Both the first sealing member and the second sealing member are sealed by ball sealing.

[0024] As one embodiment, the closed unit includes a first side pipe vertically connected to the side of the casing.

[0025] A stopper is provided at the inner wall of the sleeve where it connects with the first side tube. The stopper is located on the side of the first side tube away from the sealing unit to ensure that the first steel ball will not roll around after rolling out of the first side tube, but will roll towards the sealing unit under the action of water flow.

[0026] A first screw-in component is threadedly connected below the first side tube, a first spring and a first sealing plate are connected to the top of the first screw-in component, and a first steel ball is located on the top of the first sealing plate.

[0027] The movement of the steel ball is controlled by a spring, with a short stroke and a fast speed, which can achieve a quick closing effect.

[0028] Through the above design, the orifice safety device of the utility model is designed with a lateral opening and closing unit and a pressure relief unit to ensure the safety of the personnel in the water exploration and release construction and avoid construction at the bottom of the direct impact borehole, thereby improving the safety of personnel operation. In addition, in order to ensure that the borehole can be closed quickly, a short-stroke spring ball valve is designed to achieve rapid closing of the borehole. After the drilling is completed and the accumulated water is discharged, the casing opening can be closed with a closure member, and then the grouting operation can be carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In the attached picture:

[0030] Figure 1 It is a structural schematic diagram of the orifice safety device;

[0031] The components represented by the reference numerals in the figure are:

[0032] 1. Sleeve; 11. Stopper; 2. Closing unit; 21. First side tube; 22. First screw-in member; 23. First spring; 24. First steel ball; 3. Pressure relief unit; 31. Second side tube; 32. Second screw-in member; 33. Second spring; 34. Second steel ball; 35. Pressure relief tube. DETAILED DESCRIPTION

[0033] See also Figure 1 , a dual-purpose hole safety device for high-pressure drilling and grouting in underground mines. Drilling is first carried out using a drill rod, and grouting is carried out after the water-bearing layer is discovered.

[0034] Specifically include:

[0035] The casing 1 can accommodate the drill pipe. One end of the casing 1 is connected to the fixed pipe of the borehole through a flange. A pressure gauge is connected to the fixed pipe or the casing 1 to monitor the water pressure.

[0036] A sealing unit is connected to the other end of the casing 1, and the drill pipe can be withdrawn from the casing 1 into the sealing unit. A sealing member is provided in the sealing unit to clamp the working drill pipe;

[0037] The sealing unit 2 is connected to the side of the casing 1 and is provided with a first sealing member therein. The diameter of the first sealing member is larger than the diameter of the drill pipe and smaller than the diameter of the casing 1. The first sealing member can enter the casing 1 under the action of the thruster.

[0038] Specifically, the first sealing member is a first steel ball 24, and the sealing unit is provided with an opening having the same diameter as the drill rod. After the first steel ball 24 enters the casing 1, it is pushed by the high-pressure water flow to block the opening of the sealing unit, thereby preventing the high-pressure water flow from directly impacting the drill rod and preventing the high-pressure water flow from pushing the drill rod out.

[0039] In this embodiment, the sealing unit 2 includes a first side pipe 21 vertically connected to the side of the sleeve 1 .

[0040] A stopper 11 is provided at the inner wall of the sleeve 1 where it meets the first side tube 21. The stopper 11 is located on the side of the first side tube 21 away from the sealing unit to ensure that the first steel ball 24 does not roll around after rolling out of the first side tube 21, but rolls towards the sealing unit under the action of the water flow.

[0041] A first screw-in member 22 is threadedly connected below the first side tube 21, the top of the first screw-in member 22 is connected to a first spring 23 and a first sealing plate, and the bottom is connected to a power device to drive it to screw in or out. A first steel ball 24 is located on the top of the first sealing plate.

[0042] The movement of the steel ball is controlled by a spring, with a short stroke and a fast speed, which can achieve a quick closing effect.

[0043] In order to facilitate the discharge of accumulated water, a special pressure relief unit 3 is also connected to the casing 1 to discharge the water in the casing 1.

[0044] Specifically, it is connected to the side of the sleeve 1, located on the side of the closing unit 2 away from the sealing unit, and is provided with a second closing member and a pressure relief pipe 35;

[0045] The second sealing member can block or open the communication port between the pressure relief unit 3 and the sleeve 1 under the action of the pushing member;

[0046] The pressure relief pipe 35 is used to discharge objects that flow into the pressure relief unit 3 from the casing 1 .

[0047] In this embodiment, the pressure relief unit 3 includes a second side pipe 31 and a pressure relief pipe 35;

[0048] The second sealing member moves in a straight line in the second side tube 31, and the opening where the second side tube 31 communicates with the sleeve 1 is smaller than the second sealing member;

[0049] The pressure relief pipe 35 is connected to the side wall of the second side pipe 31 obliquely downward.

[0050] The second closing member can be a second steel ball 34. A second screw-in member 32 is threadedly connected below the second side tube 31. The top of the second screw-in member 32 is connected to a second spring 33 and a second sealing plate. The lower part is connected to a power device to drive it to work. The second steel ball 34 is located on the top of the second sealing plate.

[0051] The diameter of the second steel ball 34 is greater than that of the pressure relief pipe 35 to prevent the second steel ball 34 from rolling out of the pressure relief pipe 35 .

[0052] In order to ensure the sealing between the second steel ball 34 and the sleeve 1 , the second side tube 31 and the sleeve 1 are also vertically connected.

[0053] When draining water, the second sealing member is rotated downward to make the second steel ball 34 move downward and expose the opening of the pressure relief pipe 35, and the water in the casing 1 can enter the second side pipe 31 from the connection between the casing 1 and the second side pipe 31, and flow out from the pressure relief pipe 35. Due to the sealing effect of the second sealing plate, water will not flow under the second sealing plate.

[0054] A grouting valve is also connected to the upper side wall of the closed unit 2. After the water is drained, or when the water pressure is high and the hole needs to be plugged, the grouting pipe can be connected to the grouting valve to inject grout into the casing.

[0055] The device changes the position of the sealing unit 2 from the front to the side. When encountering a strong aquifer, the propulsion member can be controlled from the side to push the first sealing member into the casing 1. The first sealing member is blocked at the opening position of the sealing unit under the action of water flow, avoiding construction at the bottom of the direct-entry borehole, thereby ensuring the safety of water exploration and release construction personnel.

[0056] When the water pressure is relatively low, the released water continuously flows out from the pressure relief pipe 35 of the pressure relief unit 3. After the water is released, the grouting operation can be carried out.

[0057] When the water pressure is high, especially when it is detected that the water pressure remains at a high value for a long time, there may be water replenishment. The drain outlet should be abandoned and grouting operations should also be performed.

[0058] During grouting, close the pressure relief unit 3, make the second steel ball 34 in close contact with the side wall of the casing 1, then screw in the first screw-in piece 22, push the first steel ball 24 into the casing 1, and make the connection point between the grouting valve and the first side pipe 21 above the first sealing plate, and then start grouting. Due to the sealing effect of the first sealing plate, the slurry moves upward into the casing 1, and then a part pushes the first steel ball 24 to seal the left end opening of the casing 1, and the other part moves to the right and blocks the drain port.

Claims

1. A dual-purpose hole safety device for high-pressure drilling and grouting in underground mines, characterized in that: include: A casing (1) capable of accommodating a drill pipe; A sealing unit connected to one end of the casing (1), wherein the drill pipe can be withdrawn from the casing (1) into the sealing unit; A sealing unit (2) is connected to the side of the casing (1), and a first sealing member is arranged therein. The diameter of the first sealing member is larger than the diameter of the drill pipe and smaller than the diameter of the casing (1). The first sealing member can enter the casing (1) under the action of the pushing member; A pressure relief unit connected to a side of the casing (1) and used to release water in the casing (1); The grouting valve is installed on the upper part of the casing or the sealing unit (2).

2. An orifice safety device according to claim 1, characterized in that: The pressure relief unit (3) is located on a side of the closing unit (2) away from the sealing unit, and is provided with a second closing member and a pressure relief pipe (35); The second sealing member can block or open the communication port between the pressure relief unit (3) and the sleeve (1) under the action of the pushing member; The pressure relief pipe (35) is used to discharge objects that flow into the pressure relief unit (3) from the casing (1).

3. An orifice safety device according to claim 2, characterized in that: The pressure relief unit (3) comprises a second side pipe (31) and a pressure relief pipe (35); The second sealing member moves in a straight line in the second side tube (31), and the opening at the connection between the second side tube (31) and the sleeve (1) is smaller than the second sealing member; The pressure relief pipe (35) is connected obliquely downward to the side wall of the second side pipe (31).

4. An orifice safety device according to claim 3, characterized in that: The second closing member is a second steel ball (34), a second screw-in member (32) is threadedly connected below the second side tube (31), a second spring (33) and a second sealing plate are connected at the top of the second screw-in member (32), and the second steel ball (34) is located at the top of the second sealing plate.

5. An orifice safety device according to claim 4, characterized in that: The diameter of the second steel ball (34) is greater than the diameter of the pressure relief pipe (35).

6. The orifice safety device according to claim 3, characterized in that: The second side tube (31) is vertically connected to the sleeve (1).

7. An orifice safety device according to any one of claims 1 to 6, characterized in that: The first sealing member is a first steel ball (24).

8. An orifice safety device according to claim 7, characterized in that: The closed unit (2) comprises a first side tube (21) vertically connected to the side of the sleeve (1).

9. An orifice safety device according to claim 8, characterized in that: A stopper (11) is provided on the inner wall of the sleeve (1) at the junction with the first side tube (21); the stopper (11) is located on a side of the first side tube (21) away from the sealing unit.

10. An orifice safety device according to claim 8, characterized in that: A first screw-in member (22) is threadedly connected below the first side tube (21); the top of the first screw-in member (22) is connected to a first spring (23) and a first sealing plate; and the first steel ball (24) is located on the top of the first sealing plate.

Images