A tunnel surrounding rock fissure water pressure measuring device

Abstract

The application relates to the field of tunnel surrounding rock construction equipment, and discloses a tunnel surrounding rock fissure water pressure measuring device, which comprises a valve, the left and right ends of the valve are respectively provided with a communicating pipe two and a communicating pipe one through flanges, a communicating pipe three is fixedly connected between the right end of a communicating pipe four and the left end of the communicating pipe two, a spring one and a connecting column are arranged in the inner sealing sleeve of the communicating pipe four, a piston is fixedly connected to one end of the inner cavity of the communicating pipe three and arranged on the connecting column, and a fixed column is fixedly connected to the left side of the inner wall of the communicating pipe three. The device can ensure that water can completely enter the inner cavities of the communicating pipe three and the communicating pipe four, at this time, the connecting column is fixed by using the magnetic attraction of a magnetic component, and then the water pressure is applied to the inner part of a water pressure gauge through hydraulic oil to complete the water pressure measuring process. The design effectively buffers the destructive effect of the water hammer effect of water flow on the water pressure gauge and the device.

Description

Technical Field

[0001] The present application relates to the technical field of tunnel surrounding rock construction equipment, and in particular to a device for measuring water pressure in tunnel surrounding rock fissures. Background Art

[0002] Sometimes cracks appear in the surrounding rock of a tunnel, which leads to water seepage. In order to assess whether the cracks will affect the overall quality of the tunnel, a water pressure measuring device is usually required to measure the water pressure in the tunnel surrounding rock cracks. In the prior art, it is more common to use a pipe to connect the water pressure gauge for measurement, introduce water from the tunnel surrounding rock cracks into the detection pipe, and measure the water pressure in a sealed manner so that the water pressure acts entirely on the water pressure gauge. Before the water pressure measuring device is installed, the gap usually needs to be sealed. This makes the water flow and water pressure inside the water pressure measuring device very large after installation. For example, in the patented tunnel surrounding rock crack water pressure measuring device with document number CN202211302400.9, once the valve used to control the opening and closing of the water flow is opened, the water flow will generate huge pressure on the water pressure gauge under the action of depth, which is called the "water hammer effect". After the water flow enters the measuring device, it is suddenly stopped by the solid part and the water pressure gauge, thereby causing destructive damage under the action of its own inertia. Therefore, it is urgent to solve and redesign a tunnel surrounding rock crack water pressure measuring device. Summary of the Invention

[0003] This application proposes a water pressure measuring device for tunnel surrounding rock fissures, which has the advantages of protecting equipment and reducing the damage caused by the "water hammer effect", so as to solve the destructive problems caused by the "water hammer effect" in the existing technology.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a device for measuring water pressure of water in tunnel surrounding rock fissures, comprising a valve, wherein the left and right ends of the valve are respectively installed with a connecting pipe 2 and a connecting pipe 1 through flanges; a connecting pipe 4, a connecting pipe 3 is fixedly connected between its right end and the left end of the connecting pipe 2, the internal sealing sleeve of the connecting pipe 4 is provided with a spring 1 and a connecting column, the connecting column is fixedly connected to a piston at one end located in the inner cavity of the connecting pipe 3, the left side of the inner wall of the connecting pipe 3 is fixedly connected to a fixed column, the middle and outer sides of the piston are successively provided with a guide groove and a connecting hole, the inner movably sleeve of the guide groove is connected with a guide column and a spring 2, the right end of the guide column is fixedly connected to a sealing plate, the left side of the sealing plate is fixedly connected to a sealing gasket, and the sealing gasket is blocked on the right side of the connecting hole; a water pressure gauge is installed on the top of the connecting pipe 4, and is connected to the connecting pipe 1 through the connecting pipe 4, connecting pipe 3, connecting pipe 2 and the valve.

[0005] Preferably, the axial cross-section of the connecting column is in a "T" shape, and the left and right ends of the spring 1 are elastically connected to the left side of the inner wall of the connecting pipe 4 and the left end of the connecting column respectively.

[0006] Preferably, a balancing hole is provided at the left end of the connecting pipe four, and the connecting portion between the water pressure gauge and the connecting pipe four is located on the right side of the left end of the connecting column.

[0007] Preferably, the inner cavities of the connecting pipe four and the connecting pipe three are filled with hydraulic oil located on the right side of the left end of the connecting column and the left end of the piston, and the liquid level of the hydraulic oil is lower than the water pressure gauge.

[0008] Preferably, a valve core is rotatably installed inside the valve, a motor is installed on the top of the valve, and the output shaft of the motor is transmission-connected to the valve core.

[0009] Preferably, the number of the fixed columns and the communicating holes are four groups, and they are all equidistantly distributed around the axis of the communicating tube three. The fixed columns and the communicating holes in each group are coaxially distributed, and the diameter of the fixed columns is smaller than the inner diameter of the communicating holes.

[0010] Preferably, a sealing groove is provided on the right side of the communicating hole, and a clamping groove is provided on the right side of the piston, and the inner diameter of the sealing groove is greater than the inner diameter of the communicating hole.

[0011] Preferably, the sealing gasket is made of a rubber block, the sealing gasket is adapted to be snap-fitted into the sealing groove, and the sealing plate is adapted to be snap-fitted into the snap-fitted groove.

[0012] Preferably, the axial cross-section of the guide column is in a "U" shape, and the left and right ends of the second spring are elastically connected to the inner wall of the guide groove and the inner wall of the guide column respectively.

[0013] Preferably, the spring 2 is stretched and arranged in the guide column, the spring 1 is compressed and arranged on the left side of the inner wall of the connecting tube 4, the right sides of the piston and the sealing plate are both in contact with the right side of the inner wall of the connecting tube 3, and the right side of the inner wall of the connecting tube 4 is fixedly connected with a magnetic component.

[0014] The beneficial effects of the present invention are as follows: 1. The device has been redesigned to greatly eliminate the destructiveness caused by the "water hammer effect" before water pressure measurement. First, a valve is used to block the water introduced from connecting pipe one, and water is accumulated in connecting pipe one and the valve. When the valve is opened, the piston and the sealing plate are directly in contact with the water to the right, and move to the left under the continuous action of water pressure. The impact force of the water is absorbed by continuously compressing spring one, and then the spacing between the fixed column and the piston is set so that the connecting column and the piston push the sealing plate open through the fixed column after moving a certain distance, and open the connecting hole to ensure that water can completely enter the inner cavity of connecting pipe three and connecting pipe four. At this time, the connecting column is fixed by the magnetic attraction force of the magnetic component, and then the water pressure is applied to the inside of the water pressure gauge through hydraulic oil to complete the water pressure measurement process. This design effectively buffers the destructiveness of the water flow "water hammer effect" to the water pressure gauge and the device.

[0015] 2. This device also adds hydraulic oil to isolate the water in the tunnel surrounding rock fissures. The connecting column, piston and sealing plate are used to isolate water and hydraulic oil before the fixed column contacts the sealing gasket, preventing water from directly entering the water pressure gauge. Since hydraulic oil and water are both liquids, they can serve as carriers to transmit water pressure. When the connecting column drives the piston and sealing plate to the left, the sealing gasket and sealing plate are pushed to the right by the fixed column, opening the connecting hole so that water can contact with the hydraulic oil. At this time, the hydrophobicity of the hydraulic oil is used to isolate the water from the water pressure gauge, effectively protecting the water pressure gauge and extending its service life.

[0016] 3. This device is provided with a fixed column. When the connecting column, piston and sealing plate move to the left, the connecting hole is penetrated and the sealing gasket and sealing plate are pushed to the right, so that the sealing plate and sealing gasket release the blockage of the connecting hole and open the connecting hole. At this time, since the connecting hole is opened, the water pressure at both ends of the piston is balanced, and the connecting column is magnetically fixed by a magnetic component. Water starts to push the hydraulic oil to the left, so that the hydraulic oil can act upward to the inside of the water pressure gauge. The lubricity of the hydraulic oil is used to attach an oil film to the inside of the water pressure gauge, connecting pipe four and connecting pipe three, thereby reducing the oxidative corrosion damage of water to the inside of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the specification, serve to explain the principles disclosed in the present application in a clear and understandable manner. The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0018] Figure 1 It is a front perspective schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a front cutaway schematic diagram of the overall structure of the present invention;

[0020] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at A in the middle;

[0021] Figure 4 It is a top cross-sectional schematic diagram of the overall structure of the present invention;

[0022] Figure 5 For the present invention Figure 4 A schematic diagram of the structure at B in the middle;

[0023] Figure 6 This is a schematic diagram of the internal cross-section of the connecting pipe 3 of the present invention;

[0024] Figure 7 This is a schematic diagram of the separation of the spring 1, the connecting column, the fixing column, the piston and the sealing plate of the present invention;

[0025] Figure 8This is a schematic diagram of the separation of the connecting pipe 1, valve, motor, valve core and connecting pipe 2 of the present invention;

[0026] Figure 9 It is a side cutaway schematic diagram of the connecting pipe three of the present invention.

[0027] Among them: 1. Connecting pipe 1; 2. Valve; 3. Motor; 4. Valve core; 5. Connecting pipe 2; 6. Connecting pipe 3; 7. Connecting pipe 4; 8. Water pressure gauge; 9. Balance hole; 10. Spring 1; 11. Connecting column; 12. Fixed column; 13. Piston; 14. Sealing plate; 15. Connecting hole; 16. Slot; 17. Sealing groove; 18. Sealing gasket; 19. Guide groove; 20. Guide column; 21. Spring 2; 22. Hydraulic oil; 23. Magnetic component. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] See also Figures 1-9, This embodiment discloses a device for measuring water pressure in tunnel surrounding rock fissures, including a valve 2, with a connecting pipe 2 5 and a connecting pipe 1 respectively installed on the left and right ends of the valve 2 through flanges; a connecting pipe 4 7, a connecting pipe 3 6 fixedly connected between its right end and the left end of the connecting pipe 2 5, an internal sealing sleeve of the connecting pipe 4 7 is provided with a spring 10 and a connecting column 11, the connecting column 11 is located at one end of the inner cavity of the connecting pipe 3 6 and is fixedly connected to a piston 13, a fixed column 12 is fixedly connected to the left side of the inner wall of the connecting pipe 3 6, a guide groove 19 and a connecting hole 15 are opened in the middle and outer parts of the piston 13 in sequence, a guide column 20 and a spring 21 are movably sleeved inside the guide groove 19, a sealing plate 14 is fixedly connected to the right end of the guide column 20, a sealing gasket 18 is fixedly connected to the left side of the sealing plate 14, and the sealing gasket 18 is blocked on the right side of the connecting hole 15; a water pressure gauge 8 is installed on the top of the connecting pipe 4 7, and is connected to the connecting pipe 1 through the connecting pipe 4 7, the connecting pipe 3 6, the connecting pipe 2 5 and the valve 2; The device has been redesigned to significantly eliminate the destructive effects of the "water hammer effect" before water pressure measurement. First, valve 2 is used to block the water introduced from connecting pipe 1, and water accumulates in connecting pipe 1 and valve 2. When valve 2 is opened, piston 13 and sealing plate 14 directly contact the water to the right and move to the left under the continuous action of water pressure. The impact force of the water is absorbed by continuously compressing spring 10. Then, the spacing between fixing column 12 and piston 13 is set so that after moving a certain distance, connecting column 11 and piston 13 push the sealing plate 14 open through fixing column 12 and open connecting hole 15, ensuring that water can completely enter the inner cavity of connecting pipe 3 6 and connecting pipe 4 7. At this time, the magnetic attraction force of magnetic component 23 on connecting column 11 is used to fix connecting column 11, and then the water pressure is applied to the inside of water pressure gauge 8 through hydraulic oil 22 to complete the water pressure measurement process. This design effectively buffers the destructive effects of the "water hammer effect" of water flow on water pressure gauge 8 and the device. Among them, the axial cross-section of the connecting column 11 is in a "T" shape, and the left and right ends of the spring 10 are elastically connected to the left side of the inner wall of the connecting pipe 47 and the left end of the connecting column 11 respectively; Figure 2As shown, the connecting column 11 with a "T" shape is used to connect the piston 13 and the spring 10. When the water pressure acts on the connecting column 11 and causes it to move to the left, the spring 10 is continuously compressed to buffer the impact force brought by the water and avoid the occurrence of the "water hammer effect". The right side of the left end of the connecting column 11 is used to block the hydraulic oil 22 to prevent the hydraulic oil 22 from leaking. Among them, the left end of the connecting pipe 4 7 is opened with a balancing hole 9, and the connecting part between the water pressure gauge 8 and the connecting pipe 4 7 is located on the right side of the left end of the connecting column 11; the balancing hole 9 is used to balance the air pressure in the left part of the inner cavity of the connecting pipe 4 7, so that the connecting column 11 can freely move horizontally along the axis of the connecting pipe 4 7. The connecting column 11 is made of a material that can be attracted by a magnet. Among them, the inner cavity of the connecting pipe 4 7 and the connecting pipe 3 6 is filled with hydraulic oil 22 located on the right side of the left end of the connecting column 11 and the left end of the piston 13. The liquid level of the hydraulic oil 22 is lower than the water pressure gauge 8. The device also adds hydraulic oil 22 to isolate the water in the cracks of the tunnel surrounding rock. The connecting column 11, piston 13 and sealing plate 14 are used to isolate water and hydraulic oil 22 before the fixed column 12 contacts the sealing gasket 18, preventing water from directly entering the water pressure gauge 8. Since the hydraulic oil 22 and water are both liquids, they can act as carriers to transmit water pressure. When the connecting column 11 drives the piston 13 and sealing plate 14 to the left, the sealing gasket 18 and sealing plate 14 are pushed to the right by the fixed column 12, and the connecting hole 15 is opened to allow water to contact the hydraulic oil 22. At this time, the hydrophobicity of the hydraulic oil 22 is used to isolate the water from the water pressure gauge 8, effectively protecting the water pressure gauge 8 and extending its service life. Among them, the valve core 4 is rotatably installed inside the valve 2, and the motor 3 is installed on the top of the valve 2. The output shaft of the motor 3 is connected to the valve core 4 in a transmission manner; Figure 2 and Figure 4As shown, the valve 2 is opened and closed by the motor 3 and the valve core 4 through rotation, and restricts the flow of water between the connecting pipe 1 and the connecting pipe 2 5. Among them, the number of fixed columns 12 and connecting holes 15 is four, and they are all distributed equidistantly around the axis of connecting pipe three 6. Each group of fixed columns 12 and connecting holes 15 are coaxially distributed, and the diameter of the fixed columns 12 is smaller than the inner diameter of the connecting hole 15. The device is provided with fixed columns 12. When the connecting column 11, piston 13 and sealing plate 14 move to the left, they penetrate the connecting hole 15 and push the sealing gasket 18 and sealing plate 14 to the right, so that the sealing plate 14 and sealing gasket 18 release the blockage of the connecting hole 15 and open the connecting hole 15. At this time, since the connecting hole 15 is opened, the water pressure at both ends of the piston 13 is balanced, and the connecting column 11 is magnetically fixed by the magnetic component 23. Water begins to push the hydraulic oil 22 to the left, so that the hydraulic oil 22 can act upward to the inside of the water pressure gauge 8. The lubricity of the hydraulic oil 22 is used to attach an oil film to the inside of the water pressure gauge 8, connecting pipe four 7 and connecting pipe three 6, thereby reducing the oxidative corrosion damage of water to the inside of the device. Among them, a sealing groove 17 is opened on the right side of the connecting hole 15, and a card slot 16 is opened on the right side of the piston 13. The inner diameter of the sealing groove 17 is larger than the inner diameter of the connecting hole 15; the sealing gasket 18 connected to the left side of the sealing plate 14 is adapted to be snapped into the sealing groove 17, and blocks the connecting hole 15 under the action of water pressure from the right side, so that the hydraulic oil 22 will not leak to the right side of the piston 13. Among them, the sealing gasket 18 is made of a rubber block, and the sealing gasket 18 is adapted to be snapped into the sealing groove 17, and the sealing plate 14 is adapted to be snapped into the card slot 16; after being squeezed, the sealing gasket 18 can fill the entire sealing groove 17, thereby achieving the effect of sealing the connecting hole 15, and the sealing plate 14 is adapted to be snapped into the card slot 16 and is elastically limited by the guide column 20 and the spring 2 21. Among them, the axial cross-section of the guide column 20 is "U"-shaped, and the left and right ends of the spring 21 are elastically connected to the inner wall of the guide groove 19 and the inner wall of the guide column 20 respectively; as shown Figure 3 As shown, the "U"-shaped guide column 20 encloses the spring 21, providing more space for the guide column 20. Specifically, the spring 21 is stretched and arranged in the guide column 20, and the spring 10 is compressed and arranged on the left side of the inner wall of the connecting tube 4 7. The right sides of the piston 13 and the sealing plate 14 are both in contact with the right side of the inner wall of the connecting tube 3 6. The right side of the inner wall of the connecting tube 4 7 is fixedly connected to a magnetic component 23. Under initial conditions, the spring 10 and the spring 21 are both in a stressed state, and the magnetic component 23 is used to provide sufficient magnetic attraction when the connecting column 11 moves to the left to the extreme position. The magnetic component 23 can be a permanent magnet or an electromagnet.

[0030] Working principle: When the device is working, first, the right end of the connecting pipe 1 is installed in the water pressure measuring area and sealed. At this time, the valve 2 is in the closed state. After waiting for the water amount in the connecting pipe 1 to be sufficient, the valve core 4 is driven by the motor 3 to open the valve 2. At this time, due to the increase in the amount of water accumulated in the connecting pipe 1, the water begins to enter the connecting pipe 3 6 through the valve 2 and the connecting pipe 2 5, and continuously pushes the sealing plate 14, the piston 13 and the connecting column 11 to the left, compressing the spring 10. At this time, the spring 10 can absorb the impact force generated by the water flow; then, when the sealing gasket 18 abuts against the right end of the fixed column 12, the sealing plate 14 is pushed to the right by the fixed column 12, and the connecting hole 15 is opened. At this time, the sealing plate 14 drives the guide column 20 to the right to leave the inside of the guide groove 19 and The tension spring 21 causes the water on the right side of the sealing plate 14 to quickly flow into the inner cavity of the connecting pipe 3 6 located on the left side of the piston 13 along the connecting hole 15. When the connecting column 11 moves to the leftmost side, the magnetic attraction force generated by the magnetic component 23 on the connecting column 11 is the largest, and the connecting column 11 is firmly sucked to the left. At this time, the hydraulic oil 22 fills the inner cavity of the connecting pipe 4 7 and flows upward into the interior of the water pressure gauge 8. Since the hydraulic oil 22 is hydrophobic, water will not directly enter the interior of the water pressure gauge 8. When the connecting hole 15 is opened, the water pressure acts on the water pressure gauge 8 through the hydraulic oil 22. At this time, the destructiveness of the "water hammer effect" is greatly reduced. Since the connecting column 11 is adsorbed to the left by the magnetic component 23 and no longer moves, the connecting hole 15 can remain normally open. At this time, the reading of the water pressure gauge 8 is the water pressure. It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for measuring water pressure in cracks of surrounding rock of a tunnel, comprising a valve (2), characterized in that: The left and right ends of the valve (2) are respectively provided with connecting pipe 2 (5) and connecting pipe 1 (1) through flanges; connecting pipe 4 (7) is fixedly connected to connecting pipe 3 (6) between its right end and the left end of connecting pipe 2 (5); the internal sealing sleeve of connecting pipe 4 (7) is provided with spring 1 (10) and connecting column (11); the connecting column (11) is located at one end of the inner cavity of connecting pipe 3 (6) and is fixedly connected to a piston (13); the left side of the inner wall of connecting pipe 3 (6) is fixedly connected to a fixing column (12) The middle and outer sides of the piston (13) are provided with a guide groove (19) and a connecting hole (15) in sequence. The guide groove (19) is movably sleeved with a guide column (20) and a spring 2 (21). The right end of the guide column (20) is fixedly connected to a sealing plate (14). The left side of the sealing plate (14) is fixedly connected to a sealing gasket (18). The sealing gasket (18) is sealed on the right side of the connecting hole (15). A water pressure gauge (8) is installed on the top of the connecting pipe 4 (7), and is connected to the connecting pipe 4 through the connecting pipe 4. The connecting pipe 4 (7), the connecting pipe 3 (6), the connecting pipe 2 (5) and the valve (2) are connected to the connecting pipe 1 (1). The axial cross-section of the connecting column (11) is in a "T" shape. The left and right ends of the spring 1 (10) are elastically connected to the left side of the inner wall of the connecting pipe 4 (7) and the left end of the connecting column (11). The left end of the connecting pipe 4 (7) is provided with a balancing hole (9). The connecting portion of the water pressure gauge (8) and the connecting pipe 4 (7) is located on the right side of the left end of the connecting column (11). The connecting pipe 4 (7) and the inner cavity of the connecting pipe three (6) are filled with hydraulic oil (22) located on the right side of the left end of the connecting column (11) and the left end of the piston (13), and the liquid level of the hydraulic oil (22) is lower than the water pressure gauge (8). The number of the fixed columns (12) and the connecting holes (15) are four groups, and they are all distributed equidistantly around the axis of the connecting pipe three (6). The fixed columns (12) and the connecting holes (15) of each group are coaxially distributed, and the diameter value of the fixed columns (12) is smaller than the inner diameter value of the connecting hole (15).

2. A device for measuring water pressure in tunnel surrounding rock fissures according to claim 1, characterized in that: A valve core (4) is rotatably mounted inside the valve (2), a motor (3) is mounted on the top of the valve (2), and an output shaft of the motor (3) is transmission-connected to the valve core (4).

3. The device for measuring water pressure in tunnel surrounding rock fissures according to claim 2, characterized in that: A sealing groove (17) is provided on the right side of the communicating hole (15), and a clamping groove (16) is provided on the right side of the piston (13). The inner diameter of the sealing groove (17) is greater than the inner diameter of the communicating hole (15).

4. The device for measuring water pressure in tunnel surrounding rock fissures according to claim 3, characterized in that: The sealing gasket (18) is made of a rubber block, the sealing gasket (18) is adapted to be snap-fitted into the sealing groove (17), and the sealing plate (14) is adapted to be snap-fitted into the snap-fitting groove (16).

5. The device for measuring water pressure in tunnel surrounding rock fissures according to claim 4, characterized in that: The axial cross-section of the guide column (20) is in a "U" shape, and the left and right ends of the second spring (21) are elastically connected to the inner wall of the guide groove (19) and the inner wall of the guide column (20) respectively.

6. The device for measuring water pressure in tunnel surrounding rock fissures according to claim 5, characterized in that: The spring 2 (21) is stretched and arranged in the guide column (20), and the spring 1 (10) is compressed and arranged on the left side of the inner wall of the connecting tube 4 (7). The right sides of the piston (13) and the sealing plate (14) are both in contact with the right side of the inner wall of the connecting tube 3 (6), and the right side of the inner wall of the connecting tube 4 (7) is fixedly connected with a magnetic component (23).

Images