Mining negative-pressure energy-consumption-free automatic water drainage device

Abstract

The invention relates to a mining negative-pressure energy-consumption-free automatic water drainage device, and belongs to the technical field of gas safety devices.The water drainage device comprises a water storage tank, a gas inlet pipe, a gas outlet pipe and an automatic switch, and the automatic switch comprises a center lead screw, a ventilation switch, a water drainage switch, a negative-pressure blocker, a lifter, a floating ball and a balancing weight. When accumulated water in the water storage tank is increased, buoyancy drives the central lead screw to move upwards through the floating ball, the water discharge switch and the ventilation switch are gradually turned on, the accumulated water is discharged through the water discharge port, meanwhile, the lifter pushes the negative pressure blocker through the connecting rod to seal the air outlet pipe, and negative pressure is kept in the tank. Along with descending of the liquid level, the balancing weight drives the center lead screw to descend, the water drainage switch and the ventilation switch are gradually closed, meanwhile, the gas outlet pipe is opened, an extraction system can normally operate, the structure is simple, pure mechanical automatic water drainage is achieved, and all the switches act synchronously and are coordinated and consistent.

Description

Technical Field

[0001] The invention belongs to the technical field of gas safety devices, and in particular relates to a negative pressure energy-free automatic water discharge device for mines. Background Art

[0002] According to the requirements of the "Coal Mine Safety Regulations", coal and gas outburst or high-gas mines must establish a permanent ground gas extraction system or a temporary underground gas extraction system. The mine gas extraction system plays a vital role in gas control. However, the coal mine extraction system has a large amount of water accumulation in the gantry bends, inclined tunnel entrances, low-lying tunnels, temperature mutations, and various drilling construction sites, which leads to increased resistance in the extraction system, low negative pressure, unstable extraction pump operation, and poor extraction effect. In severe cases, the negative pressure of the extraction system is unstable, affecting the normal operation of the extraction pump, greatly reducing the gas extraction efficiency, and seriously threatening the gas extraction pipeline and mine production safety. Therefore, it is necessary to continuously drain water from each water accumulation point in the extraction pipeline.

[0003] The existing water dischargers are divided into manual water dischargers and automatic water dischargers. The manual water discharger realizes water discharge through manual operation, and its manufacturing process is simple, reliable and low in cost, but it needs to be guarded or inspected by a dedicated person, and has the disadvantages of low water discharge efficiency, untimely, large workload and easy omission; the automatic water discharger can be divided into energy-consuming automatic water discharger and non-energy-consuming automatic water discharger. The energy-consuming automatic water discharger realizes automatic mode by setting sensors and power devices. Its advantages are accurate and reliable control, but its disadvantages are high cost, explosion-proof design and safety certification before use. The energy-free automatic drainer achieves automatic draining through an ingenious mechanical structure, and its characteristics are simple structure, low cost, and no approval procedures required compared to the energy-consuming automatic drainer. However, in actual use, it is found that the energy-free automatic drainer has a complex manufacturing process, is not as reliable as the manual type, has a high cost, is complex to maintain, and has a high failure rate. It is easy for the seal to be loose, resulting in negative pressure loss in the pipeline, and mechanical failures to automatically drain water. Due to the lack of coordination among the various components, the closing timing of the switch is improper, resulting in failure of automatic draining and automatic resetting.

[0004] Therefore, a purely mechanical automatic water discharge device with simple structure, low cost, coordinated action and high sensitivity is urgently needed. Summary of the invention

[0005] The invention provides a negative pressure energy-free automatic water discharge device for mining, which is used to solve the technical problems of complicated structure, high cost and uncoordinated action of the water discharger in the prior art.

[0006] The present invention is achieved through the following technical scheme: a negative pressure energy-free automatic water discharge device for mining, comprising a water storage tank, an air inlet pipe, an air outlet pipe and an automatic switch arranged in the water storage tank, the water storage tank is provided with a water discharge port at the bottom and an air vent at the top, the air inlet pipe and the air outlet pipe are respectively arranged on both sides of the upper part of the water storage tank, the automatic switch comprises a central screw rod, a ventilation switch, a water discharge switch, a negative pressure blocker, a lifter, a float and a counterweight, the two ends of the central screw rod respectively pass through the water discharge port and the air vent, the water discharge switch and the ventilation switch are fixed at the two ends of the central screw rod to block the water discharge port and the air vent, the lifter is arranged in the middle of the central screw rod, the lifter is connected to one end of the negative pressure blocker through a connecting rod, the other end of the negative pressure blocker is connected to the air outlet pipe, the float and the counterweight are fixed on the central screw rod and are located between the lifter and the water discharge switch.

[0007] In order to better realize the present invention, further optimization is made in the above structure, the lifter is a scissors-type lifter, the bottom end of the scissors-type lifter is fixed on the central screw rod, the top end of the scissors-type lifter is movably sleeved on the central screw rod, one end of the connecting rod is hinged to one side end of the scissors-type lifter and the other end is hinged to one end of the negative pressure blocker.

[0008] In order to better realize the present invention, further optimization is made in the above structure, which also includes a first return spring, which is sleeved on the central screw rod, and one end of the first return spring abuts against the top wall of the water storage tank and the other end abuts against the top of the scissors-type lift.

[0009] In order to better realize the present invention, further optimization is made in the above structure, which also includes a second return spring, which is sleeved on the negative pressure blocker, one end of the negative pressure blocker abuts against the end face of the negative pressure blocker and the other end abuts against the end face of the exhaust pipe.

[0010] In order to better realize the present invention, further optimization is made in the above structure, which also includes a third return spring. The third return spring is sleeved on one end of the center screw rod extending out of the water drain outlet, and the bottom end of the center screw rod is threaded with a first adjusting nut. One end of the third return spring abuts the bottom of the water storage tank and the other end abuts the first adjusting nut.

[0011] In order to better realize the present invention, further optimization is made in the above structure, which also includes a dust cover, which is fixed on the top of the water storage tank and covers the outside of the vent, the top of the dust cover is provided with a center hole, the side of the dust cover is provided with a side through hole, the top end of the center screw rod passes through the vent and the center hole in sequence, and the ventilation switch is located between the dust cover and the vent.

[0012] In order to better realize the present invention, further optimization is made in the above structure, which also includes a fourth reset spring. The fourth reset spring is sleeved on the end of the center screw rod extending out of the vent hole, and the end of the center screw rod extending out of the center hole is threaded with a second adjusting nut, and one end of the fourth reset spring abuts against the dust cover and the other end abuts against the vent switch.

[0013] In order to better realize the present invention, further optimization is made in the above structure, and the water discharge switch and the ventilation switch are both sealing balls.

[0014] In order to better implement the present invention, further optimization is made in the above structure, which also includes a sealing cover, which is fixed to the top of the water storage tank through a flange, the vent hole is arranged at the center of the sealing cover, and the sealing cover is provided with a transparent window.

[0015] In order to better realize the present invention, further optimization is made in the above structure, and the bottom of the water storage tank is provided with supporting feet, and the bottom of the water storage tank is a conical bottom.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The negative pressure energy-free automatic water discharge device for mining provided by the present invention comprises a water storage tank, an air inlet pipe, an air outlet pipe and an automatic switch arranged in the water storage tank. A water discharge port is arranged at the bottom of the water storage tank and an air vent is arranged at the top. The air inlet pipe and the air outlet pipe are respectively arranged on both sides of the upper part of the water storage tank. The automatic switch comprises a central screw rod, an air vent switch, a water discharge switch, a negative pressure blocker, a lifter, a float and a counterweight. The two ends of the central screw rod pass through the water discharge port and the air vent respectively. The water discharge switch and the air vent switch are fixed at the two ends of the central screw rod to block the water discharge port and the air vent. The lifter is arranged in the middle of the central screw rod. The lifter is connected to one end of the negative pressure blocker through a connecting rod. The other end of the negative pressure blocker is connected to the air outlet pipe. The float and the counterweight are fixed. This structure is located on the central screw and between the lifter and the water discharge switch. The water discharge port, the vent hole and the air outlet pipe are synchronously controlled by the automatic switch. When the water in the water storage tank increases, the buoyancy drives the central screw to move upward through the float ball, thereby gradually opening the water discharge switch and the air outlet switch, allowing the accumulated water to be discharged through the water discharge port. At the same time, the lifter pushes the negative pressure blocker through the connecting rod to seal the air outlet pipe, so that the tank maintains negative pressure and prevents gas from overflowing. As the liquid level drops, the counterweight drives the central screw to drop, gradually closing the water discharge switch and the air outlet switch, and opening the air outlet pipe at the same time, so that the extraction system can operate normally. The structure is simple, and the water discharge is purely mechanical. The switches act synchronously and in a coordinated manner, ensuring the normal operation of the water discharger. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the negative pressure energy-free automatic water discharge device for mining in the present invention.

[0020] In the figure:

[0021] 1- water storage tank; 2- air inlet pipe; 3- air outlet pipe; 4- drain port; 5- vent hole; 6- center screw rod; 7- vent switch; 8- drain switch; 9- negative pressure block; 10- lifter; 11- float; 12- counterweight; 13- connecting rod; 14- first return spring; 15- second return spring; 16- third return spring; 17- first adjusting nut; 18- dust cover; 19- side through hole; 20- fourth return spring; 21- second adjusting nut; 22- sealing cover; 23- support foot. DETAILED DESCRIPTION

[0022] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Embodiment 1:

[0026] In this embodiment, a negative pressure energy-free automatic water discharge device for mining is provided. Figure 1 As shown, it includes a water tank 1, an air inlet pipe 2, an air outlet pipe 3 and an automatic switch arranged in the water tank 1. The water tank 1 is provided with a drain port 4 at the bottom and a vent 5 at the top. The air inlet pipe 2 and the air outlet pipe 3 are respectively arranged on both sides of the upper part of the water tank 1. The air outlet pipe 3 is connected to the external extraction system. Gas and water enter the water tank 1 through the air inlet pipe 2. The gas is extracted from the air outlet pipe 3 by the extraction system, and the water remains in the water tank 1. The automatic switch includes a central screw rod 6, a vent switch 7, a drain switch 8, a negative pressure blocker 9, a lifter 10, a float 11 and a counterweight 12. The two ends of the central screw rod 6 pass through the drain port 4 and the vent respectively. The air hole 5, the drain switch 8 and the vent switch 7 are fixed at both ends of the center screw 6 to block the drain port 4 and the vent 5, the lifter 10 is arranged in the middle of the center screw 6, the lifter 10 is connected to one end of the negative pressure blocker 9 through a connecting rod 13, and the other end of the negative pressure blocker 9 is connected to the air outlet pipe 3, the float 11 and the counterweight 12 are fixed on the center screw 6 and are located between the lifter 10 and the drain switch 8. When the liquid level is low, the weight of the counterweight 12 makes the vent switch 7 and the drain switch 8 in a closed state. At this time, the drain port 4 and the vent 5 are both closed, and the air outlet pipe 3 is in an open state.

[0027] With this structure, the drain port 4, the vent hole 5 and the air outlet pipe 3 are synchronously controlled through the automatic switch. When the water in the water storage tank 1 increases, the buoyancy drives the center screw 6 to move upward through the float 11, thereby gradually opening the drain switch 8 and the air switch 7, so that the accumulated water is discharged through the drain port 4. At the same time, the lifter 10 pushes the negative pressure blocker 9 through the connecting rod 13 to seal the air outlet pipe 3, so that the tank maintains negative pressure to prevent gas from overflowing. As the liquid level drops, the counterweight block 12 drives the center screw 6 to drop, gradually closing the drain switch 8 and the air switch 7, and opening the air outlet pipe 3 at the same time, so that the extraction system can operate normally. The structure is simple, and the water is discharged automatically by pure mechanical means. The switches act synchronously and in a coordinated manner, thereby ensuring the normal operation of the drain.

[0028] In this embodiment, Figure 1 As shown, the lifter 10 is a scissor-type lifter, the bottom end of the scissor-type lifter is fixed on the center screw rod 6, the top end of the scissor-type lifter is movably sleeved on the center screw rod 6, one end of the connecting rod 13 is hinged to one side end of the scissor-type lifter and the other end is hinged to one end of the negative pressure blocker 9. When the center screw rod 6 moves upward, the bottom end of the scissor-type lifter is also driven to move upward, thereby compressing the scissor-type lifter and causing one side end of the scissor-type lifter to move horizontally, thereby pushing the negative pressure blocker 9 to move in the direction of the air outlet pipe 3 through the connecting rod 13, thereby gradually closing the air outlet pipe 3, so that the inside of the water storage tank 1 is disconnected from the external extraction system.

[0029] As an optimization, it also includes a first return spring 14, which is sleeved on the center screw 6, one end of the first return spring 14 abuts against the top wall of the water storage tank 1 and the other end abuts against the top of the scissors-type lifter, and the first return spring 14 provides a pre-tightening force to the scissors-type lifter. When the liquid level drops, the first return spring 14 can assist the scissors-type lifter to return to the starting position, ensuring that the negative pressure blocker 9 remains in an open state.

[0030] Furthermore, it also includes a second return spring 15, which is sleeved on the negative pressure blocker 9. One end of the negative pressure blocker 9 abuts against the end surface of the negative pressure blocker 9 and the other end abuts against the end surface of the exhaust pipe. When the liquid level in the tank is low, the second return spring 15 keeps the negative pressure blocker 9 normally open. When the liquid level rises, the float 11 drives the central screw rod 6 to move upward, and the scissor-type lifter pushes the negative pressure blocker 9 to move toward the direction of the exhaust pipe 3 through the connecting rod 13. The negative pressure blocker 9 gradually closes the air outlet pipe 3 completely, and as the water in the tank is discharged, the liquid level gradually decreases. The center screw 6 moves downward under the action of the counterweight 12, and the thrust applied to the negative pressure blocker 9 by the scissor-type lifter gradually decreases, so that the second return spring 15 gradually recovers its deformation and pushes the negative pressure blocker 9 back to the starting position, thereby reopening the air outlet pipe 3 and connecting the water storage tank 1 to the extraction system again.

[0031] In this embodiment, a third return spring 16 is also included. The third return spring 16 is sleeved on one end of the center screw 6 extending out of the water drain port 4. The bottom end of the center screw 6 is threaded with a first adjusting nut 17. One end of the third return spring 16 abuts against the bottom of the water storage tank 1 and the other end abuts against the first adjusting nut 17. In this way, when the buoyancy of the float 11 is large enough, it can overcome the elastic force of the third return spring 16, thereby driving the center screw 6 to move upward, and the water drain switch 8 gradually opens the water drain port 4. At this time, the third return spring 16 is compressed and contracts to store energy. As the water discharge level drops, the buoyancy of the float 11 gradually decreases, and the third return spring 16 recovers its deformation, pushing the center screw 6 to move down back to the starting position, so that the water drain switch 8 closes the water drain port 4 again.

[0032] In this embodiment, a dust cover 18 is also included. The dust cover 18 is fixed on the top of the water storage tank 1 and covers the outside of the vent 5. The dust cover 18 is used to protect the vent 5 to cope with the harsh environment of dust and humidity underground and prevent the vent 5 from being blocked and affecting the normal operation of the water discharger. Specifically, a center hole is provided on the top of the dust cover 18, and a side through hole 19 is provided on the side of the dust cover 18. The top of the center screw rod 6 passes through the vent 5 and the center hole in sequence, and the ventilation switch 7 is located between the dust cover 18 and the vent 5. The center screw rod 6 moves upward to disengage the ventilation switch 7 from the vent 5, so that the vent 5 is connected to the external atmosphere through the side through hole 19, so that the water in the water storage tank 1 can be discharged through the water discharge port 4. During the drainage process, a negative pressure is formed in the water storage tank 1, so that the gas in the tank will not overflow through the vent 5.

[0033] As an optimization, it also includes a fourth return spring 20, which is sleeved on one end of the center screw 6 extending out of the vent hole 5. The end of the center screw 6 extending out of the center hole is threaded with a second adjusting nut 21. One end of the fourth return spring 20 abuts against the dust cover 18 and the other end abuts against the ventilation switch 7. When the buoyancy of the float 11 drives the center screw 6 to move upward, it is also necessary to overcome the elastic force of the fourth return spring 20, so that the ventilation switch 7 gradually opens the vent hole 5. At this time, the fourth return spring 20 is compressed and contracts to store energy. As the water discharge level drops, the buoyancy of the float 11 becomes smaller, and the counterweight block 12 drives the center screw 6 to move downward. At this time, the fourth return spring 20 recovers its deformation, further pushing the center screw 6 to move down back to the starting position, so that the ventilation switch 7 closes the vent hole 5 again.

[0034] In this embodiment, the drain switch 8 and the vent switch 7 are both sealing balls, which have a certain elastic deformation ability and can better seal the drain port 4 and the vent hole 5 .

[0035] In this embodiment, a sealing cover 22 is also included. The sealing cover 22 is fixed to the top of the water storage tank 1 through a flange. A sealing ring is arranged between the sealing cover 22 and the flange to ensure that there is no leakage or deformation under negative pressure. The vent hole 5 is arranged at the center of the sealing cover 22. The sealing cover 22 is provided with a transparent window made of explosion-proof organic glass or organic board to observe the internal working state and sludge deposition of the water storage tank 1, so as to facilitate timely cleaning.

[0036] In this embodiment, a support leg 23 is provided at the bottom of the water storage tank 1. The bottom of the water storage tank 1 is a conical bottom, which can realize automatic slag discharge when draining water, thereby preventing mud and sand from gathering at the bottom and affecting the space inside the tank and clogging the drain port 4.

[0037] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A negative pressure energy-free automatic water discharge device for mining, characterized in that: The invention comprises a water storage tank (1), an air inlet pipe (2), an air outlet pipe (3) and an automatic switch arranged in the water storage tank (1); the water storage tank (1) is provided with a water outlet (4) at the bottom and a vent hole (5) at the top; the air inlet pipe (2) and the air outlet pipe (3) are respectively arranged on both sides of the upper part of the water storage tank (1); the automatic switch comprises a central screw rod (6), a vent switch (7), a water outlet switch (8), a negative pressure blocker (9), a lifter (10), a floating ball (11) and a counterweight (12); the two ends of the central screw rod (6) respectively pass through the water outlet (4) and the vent hole (5) of the water storage tank (1 ... 4) and a vent (5), the drain switch (8) and the vent switch (7) are fixed at both ends of the central screw (6) to block the drain port (4) and the vent (5), the lifter (10) is arranged in the middle of the central screw (6), the lifter (10) is connected to one end of the negative pressure blocker (9) through a connecting rod (13), the other end of the negative pressure blocker (9) is connected to the air outlet pipe (3), the float (11) and the counterweight (12) are fixed on the central screw (6) and are located between the lifter (10) and the drain switch (8).

2. A negative pressure energy-free automatic water discharge device for mining according to claim 1, characterized in that: The lifter (10) is a scissor-type lifter, the bottom end of the scissor-type lifter is fixed on the central screw rod (6), the top end of the scissor-type lifter is movably sleeved on the central screw rod (6), one end of the connecting rod (13) is hinged to one side end of the scissor-type lifter and the other end is hinged to one end of the negative pressure blocker (9).

3. A negative pressure energy-free automatic water discharge device for mining according to claim 2, characterized in that: It also includes a first return spring (14), which is sleeved on the central screw rod (6), one end of the first return spring (14) abuts against the top wall of the water storage tank (1) and the other end abuts against the top of the scissor lift.

4. A negative pressure energy-free automatic water discharge device for mining according to claim 2, characterized in that: It also includes a second return spring (15), which is sleeved on the negative pressure blocker (9), one end of the negative pressure blocker (9) abuts against the end surface of the negative pressure blocker (9) and the other end abuts against the end surface of the exhaust pipe.

5. The negative pressure energy-free automatic water discharge device for mining according to claim 1 is characterized in that: It also includes a third return spring (16), which is sleeved on one end of the central screw rod (6) extending from the water outlet (4), and the bottom end of the central screw rod (6) is threaded with a first adjustment nut (17), and one end of the third return spring (16) abuts against the bottom of the water storage tank (1) and the other end abuts against the first adjustment nut (17).

6. The negative pressure energy-free automatic water discharge device for mining according to claim 1 is characterized by: The invention also comprises a dust cover (18), wherein the dust cover (18) is fixed on the top of the water storage tank (1) and covers the outside of the vent hole (5), the top of the dust cover (18) is provided with a central hole, the side of the dust cover (18) is provided with a side through hole (19), the top end of the central screw rod (6) passes through the vent hole (5) and the central hole in sequence, and the vent switch (7) is located between the dust cover (18) and the vent hole (5).

7. A negative pressure energy-free automatic water discharge device for mining according to claim 6, characterized in that: It also includes a fourth return spring (20), which is sleeved on one end of the center screw rod (6) extending out of the vent hole (5), and the end of the center screw rod (6) extending out of the center hole is threaded with a second adjustment nut (21), one end of the fourth return spring (20) abuts against the dust cover (18) and the other end abuts against the vent switch (7).

8. A negative pressure energy-free automatic water discharge device for mining according to any one of claims 1 to 7, characterized in that: The water discharge switch (8) and the ventilation switch (7) are both sealing balls.

9. A negative pressure energy-free automatic water discharge device for mining according to claim 8, characterized in that: It also comprises a sealing cover (22), wherein the sealing cover (22) is fixed to the top of the water storage tank (1) via a flange, the vent hole (5) is arranged at the center of the sealing cover (22), and the sealing cover (22) is provided with a transparent window.

10. A negative pressure energy-free automatic water discharge device for mining according to claim 8, characterized in that: The bottom of the water storage tank (1) is provided with a support foot (23), and the bottom of the water storage tank (1) is a conical bottom.

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