A kind of casing for measuring water pressure by drilling holes with elevation angle for grouting and draining in mines

Abstract

The invention discloses a mine-use elevation drilling grouting and water-discharging pressure measuring casing, comprising an outer casing, an inner casing, a grouting port, a negative pressure port, a negative pressure pipe, a limiting column, a double-layer flange, a pressure gauge, a control pipe, a high-pressure gate valve, a ball valve, and a water outlet; an outer casing is provided on the outside of the inner casing, and the outer casing and the inner casing are provided with a negative pressure pipe and a limiting column; a grouting port and a negative pressure port are provided on the outside of the outer casing, and the grouting port runs through the side wall of the outer casing; the negative pressure port passes through the side wall of the outer casing and is connected with the negative pressure pipe; a negative pressure pipe and two limiting columns are installed in the gap between the outer casing and the inner casing, and the negative pressure pipe and the two limiting columns are arranged in a circular matrix along the outside of the inner casing; a positioning groove is provided on the outer surface of the inner casing, and three positioning grooves are arranged in a matrix along the outer surface of the inner casing. The invention has the characteristics of easy grouting, ensuring the straightness of the casing, good grouting effect, and flexible conversion of waterproofing and pressure measurement.

Description

Technical Field

[0001] The invention relates to an elevation drilling grouting water discharge pressure measuring casing for mines, in particular to an elevation drilling grouting water discharge pressure measuring casing for mines which has the advantages of easy grouting, ensuring casing straightness, good grouting effect, and flexible conversion of waterproofing and pressure measurement. Background Art

[0002] During coal mining, it is necessary to continuously drain the water content in the borehole. In underground five-water drainage drilling, most boreholes are single-layer casing structures with simple pipe fixing processes. Considering the particularity, importance and long-term drainage characteristics of five-water drainage, two layers of casing need to be placed in the borehole, and the length of the casing is much longer than the water exploration holes constructed in the past. It becomes difficult for the double casing to remain straight and have a common center axis. Continuously draining the five-water content in the borehole also requires frequent waterproofing and pressure measurement. Summary of the invention

[0003] The purpose of the present invention is to provide a mining elevation drilling grouting water discharge pressure measuring casing which has the advantages of easy grouting, ensuring casing straightness, good grouting effect, and flexible conversion of waterproofing and pressure measurement.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A mine elevation drilling grouting water discharge pressure measuring casing, comprising an outer casing, an inner casing, a grouting port, a negative pressure port, a negative pressure pipe, a limit column, a double-layer flange, a pressure gauge, a control pipe, a high-pressure gate valve, a ball valve, and a water outlet;

[0006] An outer sleeve is arranged outside the inner sleeve, and a negative pressure tube and a limit column are installed on the outer sleeve and the inner sleeve;

[0007] The outer side of the outer sleeve is provided with a grouting port and a negative pressure port, the grouting port passes through the side wall of the outer sleeve; the negative pressure port passes through the side wall of the outer sleeve and is connected to the negative pressure pipe;

[0008] A negative pressure tube and two limit columns are installed in the gap between the outer sleeve and the inner sleeve, and the negative pressure tube and the two limit columns are arranged in a circular matrix along the outer side of the inner sleeve;

[0009] The outer surface of the inner sleeve is provided with positioning grooves, and three positioning grooves are arranged in a matrix along the outer surface of the inner sleeve; negative pressure tubes and two limiting columns are installed in the three positioning grooves; the top and bottom ends of the limiting columns are closed;

[0010] The bottom end of the negative pressure tube is closed, the top end of the negative pressure tube is open, and the top end of the negative pressure tube extends to the top end of the sleeve;

[0011] The negative pressure port is connected to a vacuum pump;

[0012] The outer sleeve and the bottom ends of the inner sleeve are both installed on the double-layer flange; the inner sleeve passes through the double-layer flange, and the outer sleeve is fixed on the double-layer flange 1;

[0013] A pressure gauge is provided on the double-layer flange;

[0014] A control pipe is provided at the bottom of the double-layer flange, and a high-pressure gate valve is provided on the control pipe; the inner casing is connected to the control pipe;

[0015] The end of the control pipe is configured as a water outlet;

[0016] A ball valve is provided on the high pressure gate valve;

[0017] The central axis of the outer sleeve and the central axis of the inner sleeve are collinear.

[0018] The present invention provides a casing for grouting, draining and measuring water pressure for elevation drilling in mines, which has the characteristics of easy grouting, ensuring the straightness of the casing, good grouting effect, and flexible conversion of waterproofing and pressure measurement. The beneficial effects of the present invention are as follows: the grouting port is arranged on the outer casing, which solves the problem of difficulty and poor effect of grouting in the gap between the outer casing and the inner casing;

[0019] The negative pressure tube and the limit column are arranged between the outer sleeve and the inner sleeve to ensure that the outer sleeve and the inner sleeve are always straight to prevent abnormal bending;

[0020] Before grouting, turn on the vacuum pump, which will extract the air in the gap between the outer casing and the inner casing, so that the gap between the outer casing and the inner casing is in a negative pressure state, and then close the negative pressure port; open the grouting port, and inject grout into the gap between the outer casing and the inner casing through the grouting pipe connected to the grouting port; the negative pressure in the gap between the outer casing and the inner casing assists in sucking the slurry, so that the slurry fills the gap between the outer casing and the inner casing, avoiding bubbles in the gap, which may cause abnormal slurry filling;

[0021] The double-layer flange realizes the sewing connection between the outer casing and the inner casing; the inner casing releases the water in the borehole from the borehole;

[0022] The pressure gauge is connected to the inner casing, and measures the water pressure in the inner casing. The pressure gauge is used to judge whether to open the high-pressure gate valve to release the water. Through the control of the high-pressure gate valve, it can flexibly switch between water release and pressure measurement, which provides great convenience for water release and water pressure parameter acquisition. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0024] Figure 1 It is a structural schematic diagram of a casing for measuring pressure for grouting, draining and measuring water for elevation drilling used in a mine according to the present invention;

[0025] Figure 2 The present invention is a cross-sectional view of an outer casing of an elevation drilling grouting water discharge pressure measuring casing for use in a mine. DETAILED DESCRIPTION

[0026] The purpose of the present invention can be achieved through the following technical solutions:

[0027] A kind of mining elevation drilling grouting water pressure measuring casing, see Figures 1-2 , including an outer casing 1, an inner casing 2, a grouting port 3, a negative pressure port 4, a negative pressure pipe 5, a limit column 6, a double-layer flange 7, a pressure gauge 8, a control pipe 9, a high-pressure gate valve 10, a ball valve 11, and a water outlet 12;

[0028] An outer sleeve 1 is arranged outside the inner sleeve 2, and a negative pressure tube 5 and a limiting column 6 are installed on the outer sleeve 1 and the inner sleeve 2;

[0029] The outer side of the outer sleeve 1 is provided with a grouting port 3 and a negative pressure port 4, the grouting port 3 penetrates the side wall of the outer sleeve 1; the negative pressure port 4 passes through the side wall of the outer sleeve 1 and is connected to the negative pressure pipe 5; the grouting port 3 is arranged on the outer sleeve 1, so as to solve the problem that the grouting in the gap between the outer sleeve 1 and the inner sleeve 2 is difficult and has a poor effect;

[0030] A negative pressure tube 5 and two limit columns 6 are installed in the gap between the outer sleeve 1 and the inner sleeve 2, and the negative pressure tube 5 and the two limit columns 6 are arranged in a circular matrix along the outer side of the inner sleeve 2; the negative pressure tube 5 and the limit columns 6 are arranged between the outer sleeve 1 and the inner sleeve 2 to ensure that the outer sleeve 1 and the inner sleeve 2 are always straight to prevent abnormal bending;

[0031] The outer surface of the inner sleeve 2 is provided with positioning grooves, and three positioning grooves are arranged in a matrix along the outer surface of the inner sleeve 2; negative pressure tubes 5 and two limiting columns 6 are installed in the three positioning grooves; the top and bottom ends of the limiting columns 6 are closed;

[0032] The bottom end of the negative pressure tube 5 is closed, the top end of the negative pressure tube 5 is open, and the top end of the negative pressure tube 5 extends to the top end of the sleeve;

[0033] The negative pressure port 4 is connected to a vacuum pump; before grouting, the vacuum pump is turned on to extract the air in the gap between the outer sleeve 1 and the inner sleeve 2, so that the gap between the outer sleeve 1 and the inner sleeve 2 is in a negative pressure state, and then the negative pressure port 4 is closed; the grouting port 3 is opened, and grouting is injected into the gap between the outer sleeve 1 and the inner sleeve 2 through the grouting pipe connected to the grouting port 3; the negative pressure in the gap between the outer sleeve 1 and the inner sleeve 2 assists in sucking the slurry, so that the slurry fills the gap between the outer sleeve 1 and the inner sleeve 2, and avoids the presence of bubbles in the gap, which causes abnormal slurry filling;

[0034] The bottom ends of the outer sleeve 1 and the inner sleeve 2 are both mounted on the double-layer flange 7; the inner sleeve 2 passes through the double-layer flange 7, and the outer sleeve 1 is fixed on the double-layer flange 1; the double-layer flange 7 realizes the sewing connection between the outer sleeve 1 and the inner sleeve 2; the inner sleeve 2 releases the water in the borehole from the borehole;

[0035] The double-layer flange 7 is provided with a pressure gauge 8; the pressure gauge 8 is connected to the inner casing 2, and the pressure gauge 8 measures the water pressure in the inner casing 2. The pressure gauge 8 judges to open the high-pressure gate valve 10 to release the water; the high-pressure gate valve 10 is controlled to flexibly switch between water release and pressure measurement, which provides great convenience for water release and water pressure parameter acquisition;

[0036] The bottom end of the double-layer flange 7 is provided with a control pipe 9, and a high-pressure gate valve 10 is provided on the control pipe 9; the inner sleeve 2 is connected to the control pipe 9;

[0037] The end of the control pipe 9 is provided with a water outlet 12;

[0038] The high pressure gate valve 10 is provided with a ball valve 11;

[0039] The central axis of the outer sleeve 1 and the central axis of the inner sleeve 2 are collinear.

[0040] Working principle of the present invention:

[0041] The present invention provides an outer sleeve 1 on the outside of the inner sleeve 2, and the outer sleeve 1 and the inner sleeve 2 are installed with a negative pressure tube 5 and a limit column 6; the outer sleeve 1 is provided with a grouting port 3 and a negative pressure port 4, and the grouting port 3 penetrates the side wall of the outer sleeve 1; the negative pressure port 4 penetrates the side wall of the outer sleeve 1 and is connected to the negative pressure tube 5; the grouting port 3 is provided on the outer sleeve 1, so as to solve the problem that the grouting in the gap between the outer sleeve 1 and the inner sleeve 2 is difficult and has a poor effect;

[0042] The negative pressure tube 5 and the limit column 6 are arranged between the outer sleeve 1 and the inner sleeve 2 to ensure that the outer sleeve 1 and the inner sleeve 2 are always straight to prevent abnormal bending;

[0043] Before grouting, turn on the vacuum pump, which extracts the air in the gap between the outer sleeve 1 and the inner sleeve 2, so that the gap between the outer sleeve 1 and the inner sleeve 2 is in a negative pressure state, and then close the negative pressure port 4; open the grouting port 3, and inject grout into the gap between the outer sleeve 1 and the inner sleeve 2 through the grouting pipe connected to the grouting port 3; the negative pressure in the gap between the outer sleeve 1 and the inner sleeve 2 assists in sucking the slurry, so that the slurry fills the gap between the outer sleeve 1 and the inner sleeve 2, avoiding bubbles in the gap, which causes abnormal slurry filling;

[0044] The double-layer flange 7 realizes the sewing connection between the outer casing 1 and the inner casing 2; the inner casing 2 releases the water in the borehole from the borehole;

[0045] The pressure gauge 8 is connected to the inner casing 2, and measures the water pressure in the inner casing 2. The pressure gauge 8 judges to open the high-pressure gate valve 10 to release the water in the inner casing 2; through the control of the high-pressure gate valve 10, it is flexible to switch between water release and pressure measurement, which provides great convenience for water release and water pressure parameter acquisition.

[0046] The present invention provides a casing for grouting, draining and measuring water pressure for elevation drilling in mines, which has the characteristics of easy grouting, ensuring the straightness of the casing, good grouting effect, and flexible conversion of waterproofing and pressure measurement. The beneficial effects of the present invention are as follows: the grouting port is arranged on the outer casing, which solves the problem of difficulty and poor effect of grouting in the gap between the outer casing and the inner casing;

[0047] The negative pressure tube and the limit column are arranged between the outer sleeve and the inner sleeve to ensure that the outer sleeve and the inner sleeve are always straight to prevent abnormal bending;

[0048] Before grouting, turn on the vacuum pump, which will extract the air in the gap between the outer casing and the inner casing, so that the gap between the outer casing and the inner casing is in a negative pressure state, and then close the negative pressure port; open the grouting port, and inject grout into the gap between the outer casing and the inner casing through the grouting pipe connected to the grouting port; the negative pressure in the gap between the outer casing and the inner casing assists in sucking the slurry, so that the slurry fills the gap between the outer casing and the inner casing, avoiding bubbles in the gap, which may cause abnormal slurry filling;

[0049] The double-layer flange realizes the sewing connection between the outer casing and the inner casing; the inner casing releases the water in the borehole from the borehole;

[0050] The pressure gauge is connected to the inner casing, and measures the water pressure in the inner casing. The pressure gauge is used to judge whether to open the high-pressure gate valve to release the water. Through the control of the high-pressure gate valve, it can flexibly switch between water release and pressure measurement, which provides great convenience for water release and water pressure parameter acquisition.

[0051] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A casing for measuring water pressure during grouting and draining at an elevation angle for use in a mine, comprising an outer casing (1), an inner casing (2), a grouting port (3), a negative pressure port (4), a negative pressure pipe (5), a limit column (6), a double-layer flange (7), a pressure gauge (8), a control pipe (9), a high-pressure gate valve (10), a ball valve (11), and a water outlet (12), characterized in that; An outer sleeve (1) is arranged outside the inner sleeve (2), and a negative pressure pipe (5) and a limiting column (6) are installed on the outer sleeve (1) and the inner sleeve (2); a grouting port (3) and a negative pressure port (4) are arranged outside the outer sleeve (1), and the grouting port (3) passes through the side wall of the outer sleeve (1); the negative pressure port (4) passes through the side wall of the outer sleeve (1) and is connected to the negative pressure pipe (5); a negative pressure pipe (5) and two limiting columns (6) are installed in the gap between the outer sleeve (1) and the inner sleeve (2), and the negative pressure pipe (5) ) and two limiting columns (6) are arranged in a circular matrix along the outer side of the inner sleeve (2); the outer surface of the inner sleeve (2) is provided with positioning grooves, and the three positioning grooves are arranged in a matrix along the outer surface of the inner sleeve (2); a negative pressure tube (5) and two limiting columns (6) are installed in the three positioning grooves; the top and bottom ends of the limiting columns (6) are closed; the bottom end of the negative pressure tube (5) is closed, the top end of the negative pressure tube (5) is open, and the top end of the negative pressure tube (5) extends to the top end of the sleeve; the negative pressure port (4) is connected to a vacuum pump.

2. The mine elevation drilling grouting water discharge pressure measuring casing according to claim 1, characterized in that: The bottom ends of the outer sleeve (1) and the inner sleeve (2) are both mounted on a double-layer flange (7); the inner sleeve (2) passes through the double-layer flange (7), and the outer sleeve (1) is fixed on the double-layer flange 1.

3. The mine elevation drilling grouting water discharge pressure measuring casing according to claim 1, characterized in that: A pressure gauge (8) is provided on the double-layer flange (7).

4. The mine elevation drilling grouting water discharge pressure measuring casing according to claim 1, characterized in that: A control pipe (9) is arranged at the bottom end of the double-layer flange (7), and a high-pressure gate valve (10) is arranged on the control pipe (9); the inner sleeve (2) is connected to the control pipe (9).

5. The mine elevation drilling grouting water discharge pressure measuring casing according to claim 1, characterized in that: The end of the control pipe (9) is arranged as a water outlet (12).

6. The mine elevation drilling grouting water discharge pressure measuring casing according to claim 1, characterized in that: The high-pressure gate valve (10) is provided with a ball valve (11).

7. The mine elevation drilling grouting water discharge pressure measuring casing according to claim 1, characterized in that: The central axis of the outer sleeve (1) and the central axis of the inner sleeve (2) are collinear.

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