Osmotic pressure monitoring device for underground reservoir coal pillar dam body

Abstract

The invention relates to an osmotic pressure monitoring device for an underground reservoir coal pillar dam body, the osmotic pressure monitoring device comprises an osmotic pressure monitoring structure, the osmotic pressure monitoring structure comprises a filter assembly, a water pipe and an osmometer which are used for being installed in the coal pillar dam body, and the water pipe is located between the filter assembly and the osmometer. The water conveying pipe is provided with a water conveying channel communicated with the filtering assembly and the osmometer, the filtering assembly comprises a water seepage end cover and a filter element located between the water seepage end cover and the water conveying pipe, a water seepage channel is formed in the water seepage end cover, and the through-flow area of the water seepage channel is gradually increased in the direction from an inlet of the water seepage channel to an outlet of the water seepage channel. The opening of the side, making contact with the soil of the coal pillar dam body, of the water seepage channel is small, and the situation that impurities enter the water seepage channel and easily block the water seepage channel is effectively avoided. Besides, the filter element can also play a role in filtering, so that the situation that impurities in the coal pillar dam body flow into the osmometer to influence the monitoring result of the osmometer and even damage the osmometer is effectively avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of seepage pressure monitoring of coal pillar dams, and specifically, to a seepage pressure monitoring device for a coal pillar dam of an underground reservoir. Background Art

[0002] During the coal mining process, huge cavities will be formed underground. In order to protect and utilize coal mine water resources, the sectional protective coal pillars formed during the coal mining process of underground coal mines are usually used as dams to form an underground reservoir to store groundwater.

[0003] Since the coal pillar dam is continuously infiltrated by groundwater during the water storage process, in order to improve the safety of the underground reservoir, it is necessary to detect the seepage pressure (i.e., osmotic pressure) of the coal pillar dam. However, the existing seepage pressure monitoring devices often have problems that they are blocked by impurities in the groundwater, resulting in the failure of the seepage pressure monitoring devices. Summary of the Invention

[0004] The purpose of the present disclosure is to provide a seepage pressure monitoring device for a coal pillar dam of an underground reservoir to solve the technical problems existing in the related art.

[0005] To achieve the above purpose, the present disclosure provides a seepage pressure monitoring device for a coal pillar dam of an underground reservoir. The seepage pressure monitoring device includes a seepage pressure monitoring structure, and the seepage pressure monitoring structure includes a filtering component, a water delivery pipe, and a piezometer, all of which are used to be installed inside the coal pillar dam. The water delivery pipe is located between the filtering component and the piezometer, and the water delivery pipe has a water delivery channel connecting the filtering component and the piezometer. The filtering component includes a water seepage end cover and a filter element located between the water seepage end cover and the water delivery pipe. A water seepage channel is formed on the water seepage end cover, and along the direction from the inlet of the water seepage channel to the outlet of the water seepage channel, the flow area of the water seepage channel gradually increases.

[0006] Optionally, the water delivery pipe includes a fixed pipe and a movable pipe. The movable pipe is movably sleeved outside the fixed pipe. One end of the fixed pipe is connected to the piezometer, and one end of the movable pipe away from the fixed pipe is connected to the filtering component. The inside of the fixed pipe and the inside of the movable pipe together form the water delivery channel; The seepage pressure monitoring structure further includes an actuating member and a resetting member. The seepage pressure monitoring structure has a first clogging clearing state and a second clogging clearing state. In the first clogging clearing state, the actuating member moves the movable pipe away from the piezometer to increase the volume of the water delivery channel. In the second clogging clearing state, the resetting member moves the movable pipe towards the piezometer to reset the movable pipe.

[0007] Optionally, the osmotic pressure monitoring device further includes a monitoring tube for installation inside the coal pillar dam body. The monitoring tube includes an outer tube and an inner tube disposed inside the outer tube. A liquid chamber for accommodating liquid is defined between the outer tube and the inner tube. The osmometer is installed in the inner tube, the water delivery pipe is located in the liquid chamber, and a water seepage port communicating with the water seepage channel is formed on the outer tube. The actuating member includes a liquid pump, and the liquid pump communicates with the liquid chamber. In the first clogging removal state, the liquid pump injects liquid into the liquid chamber to increase the pressure of the liquid in the liquid chamber, so that the liquid in the liquid chamber can push the movable tube to move. In the second clogging removal state, the liquid pump discharges part of the liquid in the liquid chamber from the liquid chamber.

[0008] Optionally, the osmotic pressure monitoring structure further includes a support sleeve. The support sleeve includes a first sleeve, a second sleeve and a connecting plate. The second sleeve is located inside the first sleeve. The first sleeve is installed on the outer tube, and one end of the first sleeve close to the outer tube and one end of the second sleeve close to the outer tube are connected by the connecting plate. One end of the movable tube close to the inner tube is turned outwards to form a force-bearing flanging, and the force-bearing flanging is slidably matched with the inner wall of the first sleeve. One end of the movable tube close to the outer tube and the filter assembly are slidably matched with the inner wall of the second sleeve. One end of the second sleeve close to the inner tube can stop the force-bearing flanging. The reset member is a first spring. The first spring is located between the first sleeve and the second sleeve. One end of the first spring is connected to the force-bearing flanging, and the other end of the first spring is connected to the connecting plate.

[0009] Optionally, the water seepage end cover is a conical structure. Along the direction from the outer tube to the inner tube, the outer diameter of the water seepage end cover gradually increases. One end of the water seepage end cover close to the inner tube contacts the inner wall of the second sleeve, and there is a gap between the outer surface of the filter element and the inner wall of the second sleeve.

[0010] Optionally, the osmotic pressure monitoring structure further includes a locking mechanism. A locking groove is formed on the first sleeve. The locking mechanism is arranged on the force-bearing flanging. The locking mechanism is configured to lock the movable tube to the first sleeve in an unlockable manner. In the first clogging removal state, the locking mechanism engages with the locking groove. In the second clogging removal state, the locking mechanism disengages from the locking groove.

[0011] Optionally, a groove with an opening facing the first sleeve is formed on the force-bearing flanging, and a limiting end cap is arranged at the opening of the groove. The locking mechanism includes a locking rod, a sliding plate arranged at one end of the locking rod, and a second spring sleeved on the locking rod. The locking rod is used for inserting into the locking groove, and the second spring is used for applying an elastic force to the sliding plate to make it move in a direction away from the first sleeve; The sliding plate is slidably arranged in the groove and divides the groove into a rod chamber and a rodless chamber. The locking rod is located in the rod chamber and movably penetrates through the limiting end cap; A first channel communicating the liquid chamber with the rodless chamber, a second channel communicating the rodless chamber and the rod chamber, and a third channel communicating the rod chamber with the liquid chamber are formed on the force-bearing flanging. A one-way valve is arranged in the first channel, and the one-way valve is used for allowing the liquid in the liquid chamber to flow unidirectionally from the liquid chamber into the rodless chamber. A valve structure is arranged in the second channel; In the first clogging removal state, the valve structure is closed, and the liquid in the liquid chamber flows unidirectionally from the liquid chamber into the rodless chamber, so that the liquid in the rodless chamber can push the locking rod to move towards the direction close to the locking groove. In the second clogging removal state, the valve structure is opened, so that the liquid in the rodless chamber can flow into the rod chamber.

[0012] Optionally, the osmotic pressure monitoring structure further includes a valve assembly. The valve assembly is arranged inside the fixed pipe. The water delivery channel includes a first water delivery channel and a second water delivery channel. The first water delivery channel is communicated with the water seepage channel, and the second water delivery channel is communicated with the osmometer. The valve assembly is located between the first water delivery channel and the second water delivery channel; The valve assembly has an open state and a closed state. In the open state, the valve assembly makes the first water delivery channel communicate with the second water delivery channel. In the closed state, the valve assembly disconnects the communication between the first water delivery channel and the second water delivery channel; In the first clogging removal state, the valve assembly is in the closed state.

[0013] Optionally, an installation cavity with one end open and the other end closed is formed on the fixed pipe. The first water delivery channel and the second water delivery channel are respectively located on both sides of the installation cavity; The valve assembly includes a valve stem, a valve plate, and a third spring. The valve stem is movably disposed through the installation cavity. The third spring is connected between the closed end of the installation cavity and the valve stem. The valve plate is located on the side of the valve stem close to the first water conveyance channel. A first valve hole communicating with the first water conveyance channel is provided on the valve plate, and a second valve hole communicating with the second water conveyance channel is provided on the valve stem. In the open state, the first valve hole and the second valve hole are aligned and communicate with each other. In the closed state, the first valve hole and the second valve hole are offset. In the first clogging removal state, the pressure of the liquid in the liquid chamber increases, so that the liquid in the liquid chamber can push the valve stem to move to the closed state.

[0014] Optionally, there are multiple osmotic pressure monitoring structures. The monitoring pipe is formed in a U shape and has mutually parallel first and second parts. At least one of the osmotic pressure monitoring structures is provided on the first part, and at least one of the osmotic pressure monitoring structures is provided on the second part.

[0015] Through the above technical solution, when the above osmotic pressure monitoring device is applied to the osmotic pressure monitoring of the coal pillar dam, the filter assembly, the water conveyance pipe, and the osmotic pressure gauge in the osmotic pressure monitoring structure can be installed inside the coal pillar dam. In this way, when the groundwater in the underground reservoir formed by the coal pillar dam infiltrates into the coal pillar dam under the action of osmotic pressure, the groundwater can flow to the osmotic pressure gauge via the filter assembly and the water conveyance pipe, and the osmotic pressure gauge can measure the osmotic pressure of the coal pillar dam, so as to realize the real-time monitoring of the osmotic pressure of the coal pillar dam.

[0016] Moreover, since the flow area of the water seepage channel increases along the direction from the inlet of the water seepage channel to the outlet of the water seepage channel, in other words, the opening on the side of the water seepage channel in contact with the soil of the coal pillar dam is smaller, and the water seepage channel with a smaller opening has a blocking effect on the impurities in the coal pillar dam, effectively avoiding the situation that impurities enter the water seepage channel and easily block the water seepage channel.

[0017] In addition, since a filter element is provided between the water seepage end cover and the water conveyance pipe, the filter element can filter the water flowing into the water conveyance pipe from the water seepage end cover, effectively avoiding the situation that the impurities in the coal pillar dam flow into the osmotic pressure gauge, affecting the monitoring result of the osmotic pressure gauge or even damaging the osmotic pressure gauge.

[0018] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the accompanying drawings: Figure 1 It is a schematic structural diagram of an osmotic pressure monitoring device provided by an exemplary embodiment of the present disclosure.

[0020] Figure 2 It is a schematic cross-sectional view of a monitoring pipe and an osmotic pressure monitoring structure of an osmotic pressure monitoring device provided by an exemplary embodiment of the present disclosure.

[0021] Figure 3 is Figure 2 an enlarged view of A in

[0022] Figure 4 It is a schematic partial cross-sectional view of an osmotic pressure monitoring structure provided by an exemplary embodiment of the present disclosure.

[0023] Figure 5 is Figure 3 an enlarged view of part B in

[0024] Figure 6 is Figure 3 an enlarged view of part C in

[0025] Figure 7 is Figure 4 an enlarged view of part D in

[0026] Figure 8 is Figure 5 an enlarged view of part E in

[0027] Description of reference numerals 100 - Osmotic pressure monitoring device; 1 - Osmotic pressure monitoring structure; 11 - Filter assembly; 111 - Water - permeable end cap; 112 - Filter element; 1121 - First filter cotton layer; 1122 - Activated carbon layer; 1123 - Second filter cotton layer; 113 - Water - permeable channel; 12 - Water delivery pipe; 121 - Water delivery channel; 1211 - First water delivery channel; 1212 - Second water delivery channel; 13 - Osmometer; 14 - Fixed pipe; 141 - Limiting protrusion; 142 - Installation cavity; 15 - Movable pipe; 151 - Force - receiving flanging; 152 - Groove; 1521 - Rod - containing cavity; 1522 - Rod - less cavity; 153 - Limiting end cap; 154 - First channel; 1541 - Check valve; 155 - Second channel; 1551 - Valve structure; 156 - Third channel; 16 - Actuating member; 161 - Liquid pump; 17 - Reset member; 171 - First spring; 18 - Mounting seat; 19 - Support sleeve; 191 - First sleeve; 192 - Second sleeve; 193 - Connecting plate; 194 - Communication hole; 195 - Filter element; 196 - Locking groove; 20 - Locking mechanism; 201 - Locking rod; 202 - Sliding plate; 203 - Second spring; 21 - Valve assembly; 211 - Valve stem; 2111 - Second valve hole; 212 - Valve plate; 2121 - First valve hole; 213 - Third spring; 214 - Actuating plate; 215 - Fourth channel; 216 - Fifth channel; 217 - Sliding cavity; 2 - Monitoring pipe; 22 - Outer pipe; 221 - Water - permeable port; 23 - Inner pipe; 24 - Liquid chamber; 25 - First part; 26 - Second part; 3 - First pipeline; 4 - Second pipeline; 5 - First control valve; 6 - Second control valve; 7 - Control board. Detailed implementation manners

[0028] The following will describe in detail the specific implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0029] In the present disclosure, it should be understood that the orientation terms such as "upper, lower" are defined according to the drawing direction of the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it cannot be understood as a limitation to the present disclosure. For example, the up - down direction can be the up - down direction of the waste steam heat energy recovery device. The terms "inner, outer" refer to the inside and outside of the corresponding structural contour. In addition, it should be noted that the terms such as "first, second" are used to distinguish one element from another, and do not have a sequential or important meaning. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same elements.

[0030] In the description of the present disclosure, it should also be noted that, unless otherwise clearly specified and defined, the terms "arrangement", "connection", "linkage", and "installation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0031] As Figures 1 to 8 shown, the present disclosure provides a seepage pressure monitoring device 100 for a coal pillar dam of an underground reservoir. The seepage pressure monitoring device 100 includes a seepage pressure monitoring structure 1. The seepage pressure monitoring structure 1 includes a filtering component 11, a water delivery pipe 12, and a piezometer 13, all of which are used for installation inside the coal pillar dam. The water delivery pipe 12 is located between the filtering component 11 and the piezometer 13. The water delivery pipe 12 has a water delivery channel 121 that connects the filtering component 11 and the piezometer 13. The filtering component 11 includes a water seepage end cap 111 and a filter element 112 located between the water seepage end cap 111 and the water delivery pipe 12. A water seepage channel 113 is formed on the water seepage end cap 111. Along the direction from the inlet of the water seepage channel 113 to the outlet of the water seepage channel 113, the flow-through area of the water seepage channel 113 gradually increases.

[0032] Through the above technical solution, when the above seepage pressure monitoring device 100 is applied to the seepage pressure monitoring of the coal pillar dam, the filtering component 11, the water delivery pipe 12, and the piezometer 13 in the seepage pressure monitoring structure 1 can be installed inside the coal pillar dam. In this way, when the groundwater in the underground reservoir formed by the coal pillar dam seeps into the coal pillar dam under the action of the osmotic pressure, the groundwater can flow through the filtering component 11 and the water delivery pipe 12 to the piezometer 13, and the piezometer 13 can measure the seepage pressure of the coal pillar dam, so as to realize the real-time monitoring of the seepage pressure of the coal pillar dam.

[0033] Moreover, since the flow-through area of the water seepage channel 113 increases along the direction from the inlet of the water seepage channel 113 to the outlet of the water seepage channel 113, in other words, the opening on the side of the water seepage channel 113 in contact with the soil of the coal pillar dam is small. The small-opening water seepage channel 113 has a blocking effect on the impurities in the coal pillar dam, effectively avoiding the situation that impurities enter the water seepage channel 113 and easily block the water seepage channel 113.

[0034] In addition, since a filter element 112 is arranged between the water seepage end cap 111 and the water delivery pipe 12, the filter element 112 can filter the water flowing into the water delivery pipe 12 through the water seepage end cap 111, effectively avoiding the situation that the impurities in the coal pillar dam flow into the piezometer 13, affecting the monitoring result of the piezometer 13 or even damaging the piezometer 13.

[0035] Here, it should be noted that the present disclosure does not limit the specific structure of the above-mentioned filter element 112. Optionally, in order to improve the filtering effect of the above-mentioned filter element 112, as Figure 4 shown, the above-mentioned filter element 112 includes a first filter cotton layer 1121, an activated carbon layer 1122, and a second filter cotton layer 1123. The activated carbon layer 1122 is disposed between the first filter cotton layer 1121 and the second filter cotton layer 1123. In this way, both the first filter cotton layer 1121 and the second filter cotton layer 1123 can filter larger impurities, and the activated carbon layer 1122 can also adsorb smaller impurities in the water flow, so that the filtering effect of the filter element 112 is better.

[0036] In addition, the first filter cotton layer 1121 and the second filter cotton layer 1123 can jointly enclose the activated carbon layer 1122 and can play a role in fixing the activated carbon layer 1122, effectively avoiding the leakage of the smaller activated carbon layer 1122 and affecting the normal use of the piezometer 13.

[0037] Since there are many impurities (such as coal, dust, etc.) in the coal pillar dam body, the filter assembly 11 is likely to be blocked during use. In order to clean the blockage, optionally, as Figure 3 shown, the above-mentioned water delivery pipe 12 may include a fixed pipe 14 and a movable pipe 15. The movable pipe 15 is movably sleeved outside the fixed pipe 14. One end of the fixed pipe 14 is connected to the piezometer 13, and the end of the movable pipe 15 away from the fixed pipe 14 is connected to the filter assembly 11. The interior of the fixed pipe 14 and the interior of the movable pipe 15 jointly form a water delivery channel 121. The seepage pressure monitoring structure 1 further includes an actuating member 16 and a resetting member 17. The seepage pressure monitoring structure 1 has a first blockage cleaning state and a second blockage cleaning state. In the first blockage cleaning state, the actuating member 16 moves the movable pipe 15 away from the piezometer 13 to increase the volume of the water delivery channel 121. In the second blockage cleaning state, the resetting member 17 moves the movable pipe 15 towards the piezometer 13 to reset the movable pipe 15.

[0038] In the above-mentioned water delivery pipe 12, the interior of the fixed pipe 14 and the interior of the movable pipe 15 can jointly form a water delivery channel 121, so that water can flow to the piezometer 13 and the seepage pressure of the coal pillar dam body can be measured by the piezometer 13.

[0039] Since the above-mentioned water delivery pipe 12 includes a fixed pipe 14 and a movable pipe 15 sleeved outside the fixed pipe 14, and the actuating member 16 and the reset member 17 enable the osmotic pressure monitoring structure 1 to have a first clogging removal state and a second clogging removal state. In this way, during use, when the filter assembly 11 is partially clogged, by controlling the actuating member 16 to move away from the osmotic pressure gauge 13, the volume of the water delivery channel 121 is increased, and the water delivery channel 121 in the water delivery pipe 12 can be formed into a negative pressure state. The water delivery channel 121 in the negative pressure state can suck water from the filter assembly 11 into the water delivery channel 121 with a greater suction force. Then, the movable pipe 15 can be made to move towards the direction close to the osmotic pressure gauge 13 under the action of the reset member 17, reducing the volume of the water delivery channel 121 and squeezing out the excess water in the water delivery channel 121. At this time, the squeezed-out water can wash the filter element 112 and / or the water seepage channel 113 of the filter assembly 11. By repeatedly performing the above operations, the cleaning of the filter assembly 11 can be achieved. In this way, on the one hand, it can avoid the situation that the osmotic pressure gauge 13 cannot normally monitor the osmotic pressure of the coal pillar dam due to the blockage of the filter assembly 11. On the other hand, it can also avoid the labor cost and material cost generated during the replacement of the filter assembly 11 due to the blockage of the filter assembly 11.

[0040] The present disclosure does not limit the specific type of the above-mentioned actuating member 16 either. As long as the actuating member 16 can drive the movable pipe 15 to move away from the osmotic pressure gauge 13. For example, the actuating member can be an expansion rod, a motor and other actuating structures.

[0041] As an implementation manner provided by the present disclosure, the above-mentioned osmotic pressure monitoring device 100 may further include a monitoring pipe 2 for installation inside the coal pillar dam. The monitoring pipe 2 includes an outer pipe 22 and an inner pipe 23 disposed inside the outer pipe 22. A liquid chamber 24 for accommodating liquid is defined between the outer pipe 22 and the inner pipe 23. The osmotic pressure gauge 13 is installed in the inner pipe 23, and the water delivery pipe 12 is located in the liquid chamber 24. A water seepage port 221 communicating with the water seepage channel 113 is opened on the outer pipe 22. The actuating member 16 includes a liquid pump 161, and the liquid pump 161 communicates with the liquid chamber 24. In the first clogging removal state, the liquid pump 161 injects liquid into the liquid chamber 24 to increase the pressure of the liquid in the liquid chamber 24, so that the liquid in the liquid chamber 24 can push the movable pipe 15 to move. In the second clogging removal state, the liquid pump 161 discharges part of the liquid in the liquid chamber 24 from the liquid chamber 24 to reduce the pressure of the liquid in the liquid chamber 24.

[0042] In the above-mentioned monitoring pipe 2, since the outer pipe 22 of the monitoring pipe 2 is provided with a water seepage port 221 communicating with the water seepage channel 113, in this way, the seepage water in the coal pillar dam can flow to the osmotic pressure gauge 13 through the water seepage port 221, the water seepage channel 113 and the water delivery channel 121, so that the osmotic pressure gauge 13 can monitor the osmotic pressure of the coal pillar dam.

[0043] Since a liquid chamber 24 for accommodating liquid is defined between the outer tube 22 and the inner tube 23, and the liquid chamber 24 is communicated with the liquid pump 161, when it is necessary to clean the filter assembly 11, the liquid pump 161 can inject liquid into the liquid chamber 24, thereby increasing the liquid in the liquid chamber 24. The liquid with a relatively large pressure can overcome the acting force of the reset member 17 and push the movable tube 15 to move, so that the water delivery channel 121 in the water delivery pipe 12 is in a negative pressure state to absorb water. When there is enough water in the water delivery pipe 12, through the liquid pump 161, the liquid in the liquid chamber 24 can be discharged, reducing the pressure of the liquid in the liquid chamber 24. At this time, since the acting force of the reset member 17 is greater than the acting force of the liquid in the liquid chamber 24 on the movable tube 15, the movable tube 15 can move towards the direction close to the osmometer 13, thereby squeezing out the water in the water delivery channel 121, so as to realize the cleaning of the filter assembly 11. In other words, only by controlling the liquid pump 161 can the cleaning of the filter assembly 11 be realized. The cleaning of the filter assembly 11 is relatively simple and has high efficiency.

[0044] Optionally, as Figure 3 shown, the above-mentioned osmotic pressure monitoring structure 1 further includes a mounting seat 18 for mounting the osmometer 13. The above-mentioned mounting seat 18 is arranged in the inner tube 23. In other words, the osmometer 13 is mounted in the inner tube 23 through the mounting seat 18, and the fixing effect of the osmometer 13 in the inner tube 23 is good and it is not easy to shake.

[0045] Optionally, as Figure 1 shown, the above-mentioned osmotic pressure monitoring device further includes a first pipeline 3, a second pipeline 4, a first control valve 5, a second control valve 6 and a control board 7. The liquid pump 161 is communicated with a liquid supply source. One end of the first pipeline 3 and one end of the second pipeline 4 are both connected to the liquid pump 161, and the other end of the first pipeline 3 and the other end of the second pipeline 4 are both connected to the liquid chamber 24. The first control valve 5 and the second control valve 6 are respectively arranged on the first pipeline 3 and the second pipeline 4. The first pipeline 3 is used for allowing liquid to flow into the liquid chamber 24, and the second pipeline 4 is used for allowing liquid to flow out of the chamber. And the first switching valve 5 and the second switching valve 6 are both electrically connected to the control board 7. In this way, by controlling the control board 7 to control the opening or closing of the first switching valve 5 and the second switching valve 6, the control of the liquid can be realized, so that the control of the pressure of the liquid in the liquid chamber 24 can be realized.

[0046] In order to guide the movement of the movable tube 15, optionally, as Figure 3As shown, the above osmotic pressure monitoring structure 1 further includes a support sleeve 19. The support sleeve 19 includes a first sleeve 191, a second sleeve 192, and a connecting plate 193. The second sleeve 192 is located inside the first sleeve 191. The first sleeve 191 is installed on the outer tube 22. One end of the first sleeve 191 close to the outer tube 22 and one end of the second sleeve 192 close to the outer tube 22 are connected by the connecting plate 193. One end of the movable tube 15 close to the inner tube 23 is turned outward to form a force-receiving flanging 151. The force-receiving flanging 151 is in sliding fit with the inner wall of the first sleeve 191. One end of the movable tube 15 close to the outer tube 22 and the filtering assembly 11 are in sliding fit with the inner wall of the second sleeve 192. One end of the second sleeve 192 close to the inner tube 23 can stop the force-receiving flanging 151. The reset member 17 is a first spring 171. The first spring 171 is located between the first sleeve 191 and the second sleeve 192. One end of the first spring 171 is connected to the force-receiving flanging 151, and the other end of the first spring 171 is connected to the connecting plate 193.

[0047] Since one side of the movable tube 15 close to the inner tube 23 is turned outward to form a force-receiving flanging 151, in this way, when the liquid in the liquid chamber 24 is increased and the liquid pressure in the liquid chamber 24 becomes larger, the liquid can act on the force-receiving flanging 151, thereby pushing the force-receiving flanging 151 to move in a direction away from the osmometer 13, making the water conveyance channel 121 form a negative pressure state.

[0048] Moreover, since the reset member 17 is configured as a first spring 171, one end of the first spring 171 is connected to the force-receiving flanging 151, and the other end of the first spring 171 is connected to the connecting plate 193. When the liquid in the liquid chamber 24 is reduced and the liquid pressure in the liquid chamber 24 becomes smaller, the elastic force of the first spring 171 can push the force-receiving flanging 151 to move in a direction close to the osmometer 13, thereby squeezing out the water in the water conveyance channel 121, and further realizing the cleaning of the filtering assembly 11.

[0049] To reduce the pressure required for the liquid pump 161 to push the force-receiving flanging 151, optionally, as Figure 3 shown, a communication hole 194 communicating the space between the first sleeve 191 and the second sleeve 192 can be opened on the above connecting plate 193. In this way, when the force-receiving flanging 151 moves under the hydraulic action of the liquid chamber 24, the gas and / or liquid in the space between the first sleeve 191 and the second sleeve 192 can be discharged from the communication part, and the gas and / or liquid will not act on the force-receiving flanging 151 in a counteracting manner under pressure, which is beneficial to reducing the hydraulic pressure required for the liquid pump 161 to drive the force-receiving flanging 151.

[0050] Optionally, as Figure 3As shown, the above osmotic pressure monitoring structure 1 further includes a filter member 195, and the filter member 195 is arranged at the communication hole 194. In this way, it can effectively prevent impurities in the coal pillar dam body from entering the space between the first sleeve 191 and the second sleeve 192, and avoid the situation that affects the normal use of the reset member 17.

[0051] It should be noted that the reset member 17 of the present disclosure is not limited to the above embodiment of the first spring 171, and the reset member 17 can be any reset member suitable for being arranged between the first sleeve 191 and the second sleeve 192. As an embodiment of the present disclosure, the above reset member 17 can also be nitrogen or hydraulic oil, etc. Nitrogen or hydraulic oil is filled in the space between the first sleeve 191 and the second sleeve 192, and the reset of the movable tube 15 can also be realized.

[0052] To avoid the movable tube 15 from damaging the osmometer 13, optionally, as Figure 3 shown, a limiting protrusion 141 is arranged on the above fixed tube 14, and the limiting protrusion 141 is used to abut against the force-receiving flange 151 when the movable tube 15 moves towards the direction close to the osmometer 13. In this way, even when the liquid pressure in the liquid chamber 24 decreases and the movable tube 15 moves towards the direction close to the osmometer 13, the limiting protrusion 141 can play a limiting role on the movable tube 15, and the movable tube 15 will not move downward all the time, effectively avoiding the situation that the movable tube 15 moves downward all the time, impacts the osmometer 13, and even damages the osmometer 13.

[0053] It should be noted that the present disclosure does not limit the shapes of the above water-permeable end cap 111 and the filter element 112 either. As an embodiment of the present disclosure, as Figure 3 and Figure 4 shown, the above water-permeable end cap 111 is a conical structure. Along the direction from the outer tube 22 to the inner tube 23, the outer diameter of the water-permeable end cap 111 gradually increases. One end of the water-permeable end cap 111 close to the inner tube 23 contacts the inner wall of the second sleeve 192, and there is a gap between the outer surface of the filter element 112 and the inner wall of the second sleeve 192.

[0054] The water-permeable end cap 111 constructed as a conical structure can also squeeze the water flow on the side of the water-permeable end cap 111 away from the osmometer 13 when the water-permeable end cap 111 moves under the action of the movable tube 15, so as to facilitate the water flow to flow into the water delivery channel 121 under the action of negative pressure.

[0055] In addition, since there is a gap between the outer surface of the filter element 112 and the inner wall of the second sleeve 192, when the filter element 112 is pushed by the movable tube 15 and moves within the second sleeve 192, the filter element 112 will not rub against the second sleeve 192. Thus, on the one hand, it can avoid the situation where the filter element 112 and the second sleeve 192 rub against each other, resulting in easy damage to the filter element 112 and / or the second sleeve 192. On the other hand, it can also reduce the force required for the movable tube 15 to move, facilitating the liquid pump 161 to drive the movable tube 15 to move.

[0056] To reduce the energy consumption during the cleaning process of the filter assembly 11, optionally, as Figure 3 shown, the above osmotic pressure monitoring structure 1 further includes a locking mechanism 20. A locking groove 196 is formed on the first sleeve 191. The locking mechanism 20 is arranged on the force-bearing flange 151. The locking mechanism 20 is configured to lock the movable tube 15 to the first sleeve 191 in a releasable manner. In the first clogging removal state, the locking mechanism 20 engages with the locking groove 196. In the second clogging removal state, the locking mechanism 20 disengages from the locking groove 196. Thus, when the first sleeve 191 moves to a preset position, the liquid pump 161 does not need to continuously supply liquid with a large pressure to the liquid chamber 24, and the relative position between the movable tube 15 and the fixed tube 14 can be fixed, so that the water delivery channel 121 can be maintained in a negative pressure state, absorbing more water into the water delivery space. More water can increase the amount of water impacting the filter assembly 11 when the water in the water delivery channel 121 is squeezed out, thereby improving the filtering effect on the filter assembly 11.

[0057] Here, it should be noted that the present disclosure does not limit the specific structure of the above locking mechanism 20, as long as the locking mechanism 20 can lock the movable tube 15 to the first sleeve 191 in a releasable manner. As an implementation manner of the present disclosure, as Figure 5 and Figure 8As shown, a groove 152 with an opening facing the first sleeve 191 can be formed on the force-bearing flanging 151. A limiting end cap 153 is arranged at the opening of the groove 152. The locking mechanism 20 includes a locking rod 201, a sliding plate 202 arranged at one end of the locking rod 201, and a second spring 203 sleeved on the locking rod 201. The locking rod 201 is used to insert into the locking groove 196. The second spring 203 is used to apply an elastic force to the sliding plate 202 to move it in a direction away from the first sleeve 191. The sliding plate 202 is slidably arranged in the groove 152 and divides the groove 152 into a rod chamber 1521 and a rodless chamber 1522. The locking rod 201 is located in the rod chamber 1521 and movably passes through the limiting end cap 153. A first channel 154 communicating the liquid chamber 24 with the rodless chamber 1522, a second channel 155 communicating the rodless chamber 1522 and the rod chamber 1521, and a third channel 156 communicating the rod chamber 1521 with the liquid chamber 24 are formed on the force-bearing flanging 151. A one-way valve 1541 is arranged in the first channel 154. The one-way valve 1541 is used to allow the liquid in the liquid chamber 24 to flow unidirectionally from the liquid chamber 24 into the rodless chamber 1522. A valve structure 1551 is arranged in the second channel 155. In the first clogging removal state, the valve structure 1551 is closed, and the liquid in the liquid chamber 24 flows unidirectionally from the liquid chamber 24 into the rodless chamber 1522, so that the liquid in the rodless chamber 1522 can push the locking rod 201 to move in a direction close to the locking groove 196. In the second clogging removal state, the valve structure 1551 is opened, so that the liquid in the rodless chamber 1522 can flow into the rod chamber 1521.

[0058] In this way, when the osmotic pressure monitoring structure 1 is in the first clogging removal state and the liquid pump 161 injects liquid into the liquid chamber 24, the liquid with a higher pressure will also flow into the rodless chamber 1522 and push the sliding plate 202 to move, thereby pushing the locking rod 201 to move in a direction close to the first sleeve 191. When the movable tube 15 moves to a preset position, the locking rod 201 can insert into the locking groove 196 on the first sleeve 191, thereby realizing the fixation of the relative position between the movable tube 15 and the fixed tube 14. At this time, even if the liquid pump 161 is turned off, but because the one-way valve 1541 is configured to allow the liquid in the liquid chamber 24 to flow unidirectionally from the liquid chamber 24 into the rodless chamber 1522, the liquid with a higher pressure cannot flow out through the one-way valve 1541, and the locking rod 201 can always be locked on the first sleeve 191. In other words, without the continuous operation of the liquid pump 161, the movable tube 15 can be fixed on the first sleeve 191 through the locking mechanism 20, so that the water delivery channel 121 is always in a negative pressure state, which is beneficial to reducing the energy consumption during the cleaning process of the filtering component 11.

[0059] Moreover, since a third channel 156 is connected between the rod chamber 1521 and the liquid chamber 24, when the sliding plate 202 is subjected to the force from the liquid chamber 24, the gas and / or liquid in the rod chamber 1521 can also be discharged through the third channel 156. The gas and / or liquid in the rod chamber 1521 will not act on the sliding plate 202 in a reverse manner under pressure, which is beneficial to reducing the hydraulic pressure required for the liquid pump 161 to drive the locking rod 201 to insert into the locking groove 196.

[0060] In addition, since a second channel 155 connecting the rodless chamber 1522 and the rod chamber 1521 is provided on the above-mentioned force-bearing flanging 151, a valve structure 1551 is provided in the second channel 155, and in the second clogging-removing state, the valve structure 1551 is opened so that the liquid in the rodless chamber 1522 can flow into the rod chamber 1521. In other words, when there is enough liquid in the water delivery channel 121, by controlling the opening of the valve structure 1551, the liquid with a higher pressure in the rodless chamber 1522 can flow into the rod chamber 1521 through the second channel 155 and can be discharged through the third channel 156. At this time, the sliding plate 202 can move in a direction away from the first sleeve 191 under the elastic force of the second spring 203, unlock the movable tube 15 from the first sleeve 191, and enable the movable tube 15 to move in a direction close to the osmometer 13 under the elastic action of the first spring 171, so that the movable tube 15 is in the second clogging-removing state, thereby realizing the cleaning of the filter assembly 11.

[0061] To avoid damage to the osmometer 13 when cleaning the filter assembly 11, optionally, as Figure 3 and Figure 6 shown, the above-mentioned osmotic pressure monitoring structure 1 further includes a valve assembly 21. The valve assembly 21 is arranged inside the fixed tube 14. The water delivery channel 121 includes a first water delivery channel 1211 and a second water delivery channel 1212. The first water delivery channel 1211 is communicated with the water seepage channel 113, and the second water delivery channel 1212 is communicated with the osmometer 13. The valve assembly 21 is located between the first water delivery channel 1211 and the second water delivery channel 1212. The valve assembly 21 has an open state and a closed state. In the open state, the valve assembly 21 makes the first water delivery channel 1211 communicate with the second water delivery channel 1212. In the closed state, the valve assembly 21 disconnects the communication between the first water delivery channel 1211 and the second water delivery channel 1212. In the first clogging-removing state, the valve assembly 21 is in the closed state.

[0062] In this way, when the osmometer 13 needs to be cleaned, by closing the valve assembly 21, the flow path between the first water delivery channel 1211 and the second water delivery channel 1212 can be disconnected, so as to avoid the situation that the osmometer 13 is affected by negative pressure and is easily damaged, which is beneficial to improving the service life of the osmometer 13.

[0063] Here, it should be noted that the present disclosure does not limit the specific type of the valve assembly 21. The valve assembly 21 may be an active valve or a passive valve, as long as the valve assembly 21 is suitable for being arranged between the first water transfer channel 1211 and the second water transfer channel 1212 and controlling the conduction relationship between the first water transfer channel 1211 and the second water transfer channel 1212. As an embodiment of the present disclosure, Figure 6 As shown, the fixed pipe 14 is provided with an installation cavity 142 with one end open and the other end closed, the first water delivery channel 1211 and the second water delivery channel 1212 are respectively located on both sides of the installation cavity 142, the valve assembly 21 includes a valve stem 211, a valve plate 212 and a third spring 213, the valve stem 211 is movably arranged in the installation cavity 142, the third spring 213 is connected between the closed end of the installation cavity 142 and the valve stem 211, the valve plate 212 is located on the side of the valve stem 211 close to the first water delivery channel 1211, and the valve plate A first valve hole 2121 communicating with the first water supply channel 1211 is provided on 212, and a second valve hole 2111 communicating with the second water supply channel 1212 is provided on the valve stem 211. In the open state, the first valve hole 2121 is aligned with and communicated with the second valve hole 2111. In the closed state, the first valve hole 2121 is staggered with the second valve hole 2111. In the first clearing state, the pressure of the liquid in the liquid chamber 24 increases, so that the liquid in the liquid chamber 24 can push the valve stem 211 to move to the closed state.

[0064] In other words, the valve assembly 21 is formed as a passive valve, so that when the seepage pressure monitoring device 100 is in the first clearing state and the liquid pump 161 injects liquid into the liquid chamber 24, the liquid with higher pressure will also push the valve stem 211 to move toward the closed end close to the mounting cavity 142, so that the second valve hole 2111 on the valve stem 211 and the first valve hole 2121 on the valve plate 212 are staggered with each other, thereby disconnecting the connection between the first valve hole 2121 and the second valve hole 2111, and putting the valve assembly 21 in a closed state.

[0065] When the first cleaning state is completed, the pressure of the liquid in the liquid chamber 24 decreases, and the valve stem 211 can move toward the closed end away from the installation cavity 142 under the elastic force of the third spring 213, so that the first valve hole 2121 is aligned and connected with the second valve hole 2111, so that the valve assembly 21 is in an open state.

[0066] In summary, it can be understood that the valve assembly 21 can be opened or closed without adding a driving device to the valve assembly 21. This can not only simplify the structure of the entire valve assembly 21 and improve the compactness of the entire seepage pressure monitoring assembly, but also reduce the cost increase caused by the use of a driving component.

[0067] Optionally, the above valve assembly 21 further includes an actuating plate 214, a fourth channel 215, a fifth channel 216, and a sliding cavity 217 provided on the side of the closed end of the valve stem 211 away from the installation cavity 142. The actuating plate 214 is disposed in the sliding cavity 217 and is connected to the valve stem 211. The fourth channel 215 is used to communicate the sliding cavity 217 with the first water conveyance channel 1211 of the water conveyance channel 121, and the fifth channel 216 is used to communicate the installation cavity 142 with the first water conveyance channel 1211 of the water conveyance channel 121. In this way, when the actuating plate 214 is driven to move by a liquid at a relatively high pressure, the gas and / or liquid in the first cavity and the installation cavity 142 can be discharged through the fourth channel 215 and the fifth channel 216 respectively, effectively avoiding the gas and / or liquid in the first cavity and the installation cavity 142 from acting on the actuating plate 214 and the valve stem 211 under pressure, which is beneficial to reducing the hydraulic pressure required for the liquid pump 161 to drive the flanging 151.

[0068] In order to improve the practicability of the osmotic pressure monitoring device 100, optionally, as Figure 2 shown, there are multiple above-mentioned osmotic pressure monitoring structures 1. The monitoring tube 2 is formed in a U shape and has a first part 25 and a second part 26 that are parallel to each other. At least one osmotic pressure monitoring structure 1 is provided on the first part 25, and at least one osmotic pressure monitoring structure 1 is provided on the second part 26. In this way, multiple osmotic pressure monitoring structures 1 can simultaneously monitor the osmotic pressure in different areas of the coal pillar dam body, thereby improving the monitoring effect of the osmotic pressure of the coal pillar dam body.

[0069] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0070] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0071] Furthermore, any combination can be made between various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A seepage pressure monitoring device for coal pillar dam of underground reservoir, characterized in that: The seepage pressure monitoring device includes a seepage pressure monitoring structure, which includes a filter assembly, a water pipe and a piezometer, all of which are used to be installed inside the coal pillar dam body. The water pipe is located between the filter assembly and the piezometer, and the water pipe has a water channel connecting the filter assembly and the piezometer. The filter assembly includes a seepage end cover and a filter element located between the seepage end cover and the water pipe. A seepage channel is formed on the seepage end cover, and the flow area of ​​the seepage channel gradually increases along the direction from the inlet of the seepage channel to the outlet of the seepage channel.

2. The osmotic pressure monitoring device according to claim 1, characterized in that: The water delivery pipe comprises a fixed pipe and a movable pipe, wherein the movable pipe is movably sleeved on the outside of the fixed pipe, one end of the fixed pipe is connected to the osmometer, and one end of the movable pipe away from the fixed pipe is connected to the filter assembly, and the interior of the fixed pipe and the interior of the movable pipe together constitute the water delivery channel; The osmotic pressure monitoring structure also includes an actuator and a reset member. The osmotic pressure monitoring structure has a first clearing state and a second clearing state. In the first clearing state, the actuator moves the movable tube in a direction away from the osmometer to increase the volume of the water transfer channel. In the second clearing state, the reset member moves the movable tube in a direction close to the osmometer to reset the movable tube.

3. The osmotic pressure monitoring device according to claim 2, characterized in that: The seepage pressure monitoring device also includes a monitoring tube for installation inside the coal pillar dam body, the monitoring tube includes an outer tube and an inner tube arranged inside the outer tube, a liquid chamber for containing liquid is defined between the outer tube and the inner tube, the osmometer is installed on the inner tube, the water delivery pipe is located in the liquid chamber, and a seepage port connected to the seepage channel is opened on the outer tube; The actuator includes a liquid pump, which is connected to the liquid chamber. In the first clearing state, the liquid pump injects liquid into the liquid chamber to increase the pressure of the liquid in the liquid chamber so that the liquid in the liquid chamber can push the movable tube to move. In the second clearing state, the liquid pump discharges part of the liquid in the liquid chamber from the liquid chamber.

4. The osmotic pressure monitoring device according to claim 3, characterized in that: The seepage pressure monitoring structure further includes a support sleeve, the support sleeve includes a first sleeve, a second sleeve and a connecting plate, the second sleeve is located inside the first sleeve, the first sleeve is installed on the outer tube, and one end of the first sleeve close to the outer tube and one end of the second sleeve close to the outer tube are connected through the connecting plate; One end of the movable tube close to the inner tube is folded outward to form a stress-bearing flange, and the stress-bearing flange is slidably matched with the inner wall of the first sleeve, and one end of the movable tube close to the outer tube and the filter assembly are slidably matched with the inner wall of the second sleeve, and one end of the second sleeve close to the inner tube can stop the stress-bearing flange; The reset member is a first spring, the first spring is located between the first sleeve and the second sleeve, one end of the first spring is connected to the force-bearing flange, and the other end of the first spring is connected to the connecting plate.

5. The osmotic pressure monitoring device according to claim 4, characterized in that: The water seepage end cover is a conical structure. The outer diameter of the water seepage end cover gradually increases along the direction from the outer tube to the inner tube. The end of the water seepage end cover close to the inner tube contacts the inner wall of the second sleeve, and there is a gap between the outer surface of the filter element and the inner wall of the second sleeve.

6. The osmotic pressure monitoring device according to claim 4, characterized in that: The seepage pressure monitoring structure also includes a locking mechanism, a locking groove is formed on the first sleeve, the locking mechanism is arranged on the force-bearing flange, and the locking mechanism is constructed to be able to unlockably lock the movable tube to the first sleeve. In the first clearing state, the locking mechanism engages with the locking groove, and in the second clearing state, the locking mechanism disengages from the locking groove.

7. The osmotic pressure monitoring device according to claim 6, characterized in that: A groove opening toward the first sleeve is formed on the force-bearing flange, a limited end cover is provided at the opening of the groove, the locking mechanism comprises a locking rod, a sliding plate provided at one end of the locking rod, and a second spring sleeved on the locking rod, the locking rod is used to be inserted into the locking groove, and the second spring is used to apply an elastic force to the sliding plate to make it move in a direction away from the first sleeve; The sliding plate is slidably disposed in the groove and divides the groove into a rod cavity and a rodless cavity. The locking rod is located in the rod cavity and is movably disposed through the position-limiting end cover. The stressed flange is formed with a first channel connecting the liquid chamber with the rodless chamber, a second channel connecting the rodless chamber with the rod chamber, and a third channel connecting the rod chamber with the liquid chamber. A one-way valve is provided in the first channel, and the one-way valve is used to allow the liquid in the liquid chamber to flow from the liquid chamber into the rodless chamber in one direction. A valve structure is provided in the second channel. In the first clearing state, the valve structure is closed, and the liquid in the liquid chamber flows unidirectionally from the liquid chamber into the rodless chamber, so that the liquid in the rodless chamber can push the locking rod to move toward the locking groove. In the second clearing state, the valve structure is opened, so that the liquid in the rodless chamber can flow into the rod chamber.

8. The osmotic pressure monitoring device according to claim 3, characterized in that: The seepage pressure monitoring structure further includes a valve assembly, the valve assembly is arranged inside the fixed pipe, the water delivery channel includes a first water delivery channel and a second water delivery channel, the first water delivery channel is communicated with the seepage channel, the second water delivery channel is communicated with the osmometer, and the valve assembly is located between the first water delivery channel and the second water delivery channel; The valve assembly has an open state and a closed state. In the open state, the valve assembly enables communication between the first water transfer channel and the second water transfer channel. In the closed state, the valve assembly disconnects communication between the first water transfer channel and the second water transfer channel. In the first clearing state, the valve assembly is in a closed state.

9. The osmotic pressure monitoring device according to claim 8, characterized in that: The fixed pipe is provided with an installation cavity with one end open and the other end closed, and the first water delivery channel and the second water delivery channel are respectively located on two sides of the installation cavity; The valve assembly includes a valve stem, a valve plate and a third spring, wherein the valve stem is movably arranged in the installation cavity, the third spring is connected between the closed end of the installation cavity and the valve stem, the valve plate is located on a side of the valve stem close to the first water transfer channel, the valve plate is provided with a first valve hole communicating with the first water transfer channel, and the valve stem is provided with a second valve hole communicating with the second water transfer channel; In the open state, the first valve hole is aligned with and connected to the second valve hole, and in the closed state, the first valve hole is staggered with the second valve hole; In the first clearing state, the pressure of the liquid in the liquid chamber increases, so that the liquid in the liquid chamber can push the valve stem to move to the closed state.

10. The osmotic pressure monitoring device according to any one of claims 3 to 9, characterized in that: There are multiple osmotic pressure monitoring structures. The monitoring tube is formed into a U shape and has a first part and a second part parallel to each other. At least one osmotic pressure monitoring structure is arranged on the first part, and at least one osmotic pressure monitoring structure is arranged on the second part.

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