Rapid pressure measuring and releasing device for confined water in drill hole

Abstract

A rapid pressure measuring and releasing device for pressure-bearing water in a drill hole relates to the field of pressure measuring and releasing devices for coal mine drill holes, and comprises a casing pipe and a sleeve which are coaxially arranged and fixedly connected, the sleeve is connected with a pressure releasing pipe, and the pressure releasing pipe is provided with a pressure releasing valve and a pressure gauge; a valve ball is arranged in the sleeve and located above the pressure relief pipe, the valve ball comprises a cylindrical part and arc parts symmetrically arranged at the two ends of the cylindrical part, a through hole is formed in the cylindrical part in the radial direction of the cylindrical part, the vertex positions of the two arc parts are each provided with a valve rod penetrating through the wall of the sleeve, and the valve rods are rotationally connected to the sleeve; and a sealing gasket is arranged on the inner wall of the sleeve corresponding to the cylindrical part. The gate valve is used for solving the technical problem that in the prior art, gate valve installation, pressure measurement and pressure relief are inconvenient.

Description

Technical Field

[0001] The utility model relates to the field of coal mine borehole pressure measuring and pressure relief devices, in particular to a borehole pressure-bearing water rapid pressure measuring and pressure relief device. Background Art

[0002] The application of floor grouting reinforcement technology not only helps to ensure the current production safety of coal mines, but also promotes the sustainable development of coal mines. The reinforced floor can extend the service life of the mine and provide support for the long-term development of the coal mine.

[0003] When drilling holes for grouting reinforcement of the bottom plate, a gate valve needs to be installed at the hole mouth when the hole is completed to prevent the outflow of large-flow pressurized water and the occurrence of flooding accidents. However, when encountering a water-rich area of ​​the aquifer, a large amount of water will gush out from the hole mouth during the drilling process, and the installation process of the hole mouth gate valve is more difficult. In addition, the water pressure in the hole after the hole is completed should be maintained within a certain safety range. Therefore, it is necessary to measure the pressure in the hole and release the pressure in time when the water pressure exceeds the safety range. Generally, the pressure is released by opening the gate valve, and then closing the gate valve after the pressure is released. The operation of opening and closing the gate valve is relatively cumbersome, and the gate valve needs to overcome a certain resistance when opening and closing the gate valve when the water outlet is under pressure in the hole, which makes the opening and closing operation inconvenient. Utility Model Content

[0004] The utility model aims to provide a device for rapid pressure measurement and pressure relief of borehole pressure water, so as to solve the technical problem of inconvenience in installation, pressure measurement and pressure relief of gate valves in the prior art.

[0005] In order to solve the above technical problems, the specific solution adopted by the utility model is: a rapid pressure measurement and pressure relief device for borehole pressurized water, comprising a casing and a sleeve coaxially arranged and fixedly connected, the sleeve being connected to a pressure relief pipe, and the pressure relief pipe being provided with a pressure relief valve and a pressure gauge; a valve ball is arranged in the sleeve and the valve ball is located above the pressure relief pipe, the valve ball comprises a cylindrical portion and arc portions symmetrically arranged at both ends of the cylindrical portion, a through hole is opened on the cylindrical portion along its radial direction, a valve stem passing through the sleeve wall is provided at the vertex position of the two arc portions, and the valve stem is rotatably connected to the sleeve; a sealing gasket is provided at the position of the inner wall of the sleeve corresponding to the cylindrical portion.

[0006] As a further optimization of the above technical solution, the sealing gaskets are in two pieces and are symmetrically arranged in the sleeve. The sealing gaskets are in the shape of long strips, and their length direction is parallel to the axial direction of the sleeve.

[0007] As a further optimization of the above technical solution, the sealing gasket is made of rubber.

[0008] As a further optimization of the above technical solution, a wear-resistant rubber layer is provided in the through hole.

[0009] As a further optimization of the above technical solution, the wear-resistant rubber layer is detachably connected to the inner wall of the through hole.

[0010] As a further optimization of the above technical solution, a handle is provided at one end of the valve stem outside the sleeve.

[0011] As a further optimization of the above technical solution, the handle is in the shape of an elongated strip, and the length direction of the handle is parallel to the axis of the through hole.

[0012] As a further optimization of the above technical solution, a mounting hole is opened on the wall of the sleeve, the valve stem is rotatably arranged in the mounting hole, and a sealing ring is arranged between the valve stem and the mounting hole.

[0013] As a further optimization of the above technical solution, a flange is provided at one end of the sleeve away from the casing.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The utility model connects a pressure relief pipe to one side of the sleeve. When a water-rich layer is encountered during drilling, part of the water in the drill hole flows out of the pressure relief pipe, reducing the water pressure in the sleeve. After the drill rod is removed from the sleeve, the valve ball is rotated to make the axis of the valve ball through hole perpendicular to the axis of the sleeve, and the sleeve can be sealed. Due to the pressure-dividing effect of the pressure relief pipe, the process of rotating the ball valve to open or seal the sleeve is relatively labor-saving. By installing a pressure relief valve and a pressure gauge on the pressure relief pipe, automatic pressure relief can be performed after detecting that the pressure in the pressure relief pipe exceeds a safe range. There is no need to frequently open the valve ball for pressure relief, and the pressure measurement and pressure relief process is relatively convenient. When the water pressure in the sleeve is too high, the through hole on the valve ball can be connected with the inner cavity of the sleeve by rotating the valve ball, and auxiliary pressure relief is performed through the valve ball through hole.

[0016] 2. By arranging a sealing gasket in the sleeve, when the valve ball blocks the sleeve, the sealing gasket seals in the gap between the two ends of the through hole and the inner wall of the sleeve, preventing water from flowing out of the gap between the two ends of the through hole and the inner wall of the sleeve, thereby improving the sealing effect.

[0017] 3. After passing the drill rod through the through hole, drilling can be carried out. The through hole can constrain the drill rod to prevent it from tilting. A wear-resistant rubber layer is arranged in the through hole, which can not only protect the drill rod, but also narrow the gap between the through hole and the drill rod, reducing the amount of water flowing out along the drill rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a side cross-sectional schematic diagram when the valve ball through hole is connected to the sleeve;

[0019] Figure 2 It is a side cross-sectional view of the valve ball blocking the inner cavity of the sleeve;

[0020] Figure 3 Schematic diagram of a top view of the sleeve;

[0021] Figure 4 is a side view schematic diagram of the sleeve;

[0022] Figure 5 is a structural schematic diagram of the valve ball;

[0023] Fig. 1 is a sleeve, 2 is a sleeve, 3 is a valve ball, 301 is a cylindrical part, 302 is an arc part, 4 is a rubber layer, 5 is a through hole, 6 is a valve rod, 7 is a handle, 8 is a pressure gauge, 9 is a pressure relief valve, 10 is a pressure relief pipe, 11 is a drill rod, 12 is a coal seam, 13 is a sealing gasket. DETAILED DESCRIPTION

[0024] The technical scheme of the utility model will be further described in detail below in combination with specific embodiments. The parts not described and disclosed in the following embodiments of the utility model should be understood as the prior art known or should be known by the person skilled in the art, such as the structure of the pressure relief valve and the pressure gauge and the interlocking control method.

[0025] As shown in Figure 1 , 2 , the utility model discloses a bore pressure-bearing water rapid pressure measurement and pressure relief device, including coaxial arrangement and fixed connection's sleeve 1 and sleeve 2, sleeve 1 and sleeve 2 are all cylindrical, and both are fixedly connected through flange.

[0026] Sleeve 2 is connected with pressure relief pipe 10, and pressure relief pipe 10 is vertically fixed in the middle lower part of sleeve 2, and pressure relief valve 9 and pressure gauge 8 are arranged on pressure relief pipe 10, pressure gauge 8 is used for real-time monitoring the water pressure in pressure relief pipe 10, and pressure gauge 8 and pressure relief valve 9 are interlocked control, and the pressure signal monitored by pressure gauge 8 is real-time transferred to pressure relief valve 9, when the water pressure exceeds the safe range, pressure relief valve 9 opens to realize pressure relief.

[0027] Sleeve 2 is provided with valve ball 3, and valve ball 3 is located above pressure relief pipe 10. Figure 5 As shown in , valve ball 3 includes cylindrical part 301 in the middle and arc part 302 symmetrically arranged at both ends of cylindrical part 301, through hole 5 is formed on cylindrical part 301 along the radial direction thereof, the vertex positions of the two arc parts 302 are provided with a valve rod 6 penetrating the barrel wall of sleeve 2, valve rod 6 is rotatably connected to sleeve 2, a mounting hole is formed in the barrel wall of sleeve 2, valve rod 6 is rotatably arranged in the mounting hole, and a sealing ring is arranged between the mounting hole and valve rod 6. The axial direction of valve rod 6 is perpendicular to the axial direction of through hole 5, and rotating valve rod 6 controls the rotation of valve ball 3 to make through hole 5 communicate with the inner cavity of sleeve 2 or block sleeve 2.

[0028] Figure 3 , 4As shown, a sealing gasket 13 is provided on the inner wall of the sleeve 2 at a position corresponding to the cylindrical portion 301. Two sealing gaskets 13 are symmetrically arranged within the sleeve 2. These seal the gap between the cylindrical portion 301 of the valve ball 3 and the inner wall of the sleeve 2, preventing water from escaping through this gap. The sealing gasket 13 is elongated, with its length parallel to the axial direction of the sleeve 2. The width of the sealing gasket 13 matches the height of the cylindrical portion 301. The sealing gasket 13 is made of rubber, and the spacing between the two sealing gaskets 13 is slightly smaller than the diameter of the cylindrical portion 301. The cylindrical portion 301 compresses the sealing gasket 13 to achieve a seal.

[0029] Continue to refer Figure 1 、 2 , a handle 7 is provided at one end of the valve stem 6 outside the sleeve 2. The handle 7 can be round, straight or elongated. The handle 7 in this embodiment is elongated, and the length direction of the handle 7 is parallel to the axial direction of the through hole 5. In the process of rotating the handle 7 to drive the valve ball 3 to rotate, the direction of the through hole 5 can be determined by the position of the handle 7. When the handle 7 is set vertically, the through hole 5 is in a vertical state. At this time, the inner cavity of the sleeve 2 is connected to the outside world. When the handle 7 is set horizontally, the through hole 5 rotates to a horizontal state. At this time, the sleeve 2 is blocked by the valve ball 3.

[0030] A wear-resistant rubber layer 4 is provided in the through hole 5. The provision of the wear-resistant rubber layer 4 can prevent the drill rod 11 from directly contacting or colliding with the inner wall of the through hole 5, thereby providing a certain degree of protection for the drill rod 11. The wear-resistant rubber layer 4 is detachably mounted on the inner wall of the through hole 5. When the wear-resistant rubber layer 4 is worn, it can be promptly removed and replaced. Moreover, by replacing the wear-resistant rubber layer 4 with a different thickness, it can also accommodate drill rods 11 of different diameters. The wear-resistant rubber layer 4 is detachably mounted on the inner wall of the through hole 5 by bonding. It is understandable that the detachable connection can also be achieved by other methods in the prior art.

[0031] When the water pressure in the sleeve 2 is too high, the valve ball 3 can be rotated to connect the through hole 5 on it with the inner cavity of the sleeve 2, and the sleeve 2 is assisted to relieve pressure through the through hole 5. A flange is provided at the end of the sleeve 2 away from the casing 1. During auxiliary pressure relief, the flange is connected to the drainage pipe, so that the water in the drill hole can flow quickly to the target position.

[0032] When the utility model is in use, first, a shallow hole is drilled in the target mineral layer 12, and the casing 1 is inserted into the mineral layer 12, with the sleeve 2 located above the mineral layer 12. The handle 7 is turned to a vertical state to adjust the axial direction of the through hole 5 to a vertical direction. The drill rod 11 is passed through the through hole 5 and drilling is carried out. When water from the water-rich layer rises along the drill rod 11, the drill rod 11 is removed, and the handle 7 is turned to a horizontal state to adjust the axial direction of the through hole 5 to a horizontal direction. The sleeve 2 is blocked by the valve ball 3 to prevent the water in the borehole from flowing along the sleeve 2 into the tunnel. When the water in the borehole flows into the sleeve 2, the water pressure in the pressure relief pipe 10 increases, and the pressure gauge 8 transmits the pressure signal to the pressure relief valve 9. The pressure relief valve 9 opens to discharge part of the water from the pressure relief pipe 10, reducing the water pressure in the sleeve 2 and facilitating the rotation of the valve ball 3 to block the sleeve 2. At the same time, there is no need to install a gate valve as in the prior art under the impact of water flow.

[0033] By using the device of the present invention, when drilling the final hole, the drill rod 11 is pulled out, the handle 7 is turned to a horizontal state, the sleeve 2 is blocked by the valve ball 3, and the pressure relief valve 9 adjusts the pressure relief in time according to the water pressure monitored by the pressure gauge 8 when the water pressure is too high. There is no need to frequently open the valve ball 3 to relieve pressure, and the pressure measurement and pressure relief process is relatively convenient. When the water pressure in the sleeve 2 is too high, the through hole 5 on the valve ball 3 can be connected with the inner cavity of the sleeve 2 by rotating the valve ball 3, and auxiliary pressure relief is performed through the through hole 5 of the valve ball 3, so that the water pressure in the drill hole can be quickly reduced in a relatively short time.

[0034] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily 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 is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for rapid pressure measurement and pressure relief of borehole pressure water, comprising a casing (1) and a sleeve (2) coaxially arranged and fixedly connected, characterized in that: The sleeve (2) is connected to a pressure relief pipe (10), and the pressure relief pipe (10) is provided with a pressure relief valve (9) and a pressure gauge (8); A valve ball (3) is provided in the sleeve (2) and is located above the pressure relief pipe (10). The valve ball (3) comprises a cylindrical portion (301) and arc portions (302) symmetrically arranged at both ends of the cylindrical portion (301). A through hole (5) is provided on the cylindrical portion (301) along its radial direction. A valve stem (6) passing through the wall of the sleeve (2) is provided at the vertex position of each of the two arc portions (302). The valve stem (6) is rotatably connected to the sleeve (2). A sealing gasket (13) is provided at a position on the inner wall of the sleeve (2) corresponding to the cylindrical portion (301).

2. A rapid pressure measurement and pressure relief device for borehole pressure water according to claim 1, characterized in that: The sealing gasket (13) consists of two pieces and is symmetrically arranged in the sleeve (2). The sealing gasket (13) is in the shape of an elongated strip, and its length direction is parallel to the axial direction of the sleeve (2).

3. The device for rapid pressure measurement and pressure relief of borehole pressure water according to claim 1, characterized in that: The material of the sealing gasket (13) is rubber.

4. A rapid pressure measurement and pressure relief device for borehole pressure water according to claim 1, characterized in that: A wear-resistant rubber layer (4) is provided in the through hole (5).

5. A rapid pressure measurement and pressure relief device for borehole pressure water according to claim 4, characterized in that: The wear-resistant rubber layer (4) is detachably connected to the inner wall of the through hole (5).

6. A rapid pressure measurement and pressure relief device for borehole pressure water according to claim 1, characterized in that: A handle (7) is provided at one end of the valve stem (6) located outside the sleeve (2).

7. A rapid pressure measurement and pressure relief device for borehole pressure water according to claim 6, characterized in that: The handle (7) is in the shape of an elongated strip, and the length direction of the handle (7) is parallel to the axis of the through hole (5).

8. The device for rapid pressure measurement and pressure relief of borehole pressure water according to claim 1, characterized in that: A mounting hole is provided on the wall of the sleeve (2), the valve stem (6) is rotatably arranged in the mounting hole, and a sealing ring is provided between the valve stem (6) and the mounting hole.

9. The device for rapid pressure measurement and pressure relief of borehole pressure water according to claim 1, characterized in that: A flange is provided at one end of the sleeve (2) away from the sleeve (1).

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