A negative pressure water drain

Abstract

The utility model relates to a water drainer technical field, concretely is a kind of negative pressure water drainer, including jar body and detachably set on the transparent jar cover of jar body, water inlet valve and drain valve are arranged on jar body, air inlet valve and air extraction valve are arranged on transparent jar cover, water inlet valve and air extraction valve are used to be fixedly connected with gas extraction pipeline, sealing plate is movably arranged in jar body, sealing plate is located the immediately below of air extraction valve and can seal or open air extraction valve;Filter screen is detachably arranged between water inlet valve and drain valve in jar body, sealing plate is located above filter screen.The utility model discloses a negative pressure water drainer, can realize automatic discharge waste water, while filter screen enters the impurity in waste water and intercepts, possibly avoid impurity to block drain valve, avoid to cause negative pressure water drainer to stop;Staff observes the condition of filter screen through transparent jar cover, takes down transparent jar cover and filter screen, and staff can periodically dismount cleaning to filter screen, improve the service life of negative pressure water drainer.

Description

Technical Field

[0001] This utility model relates to the field of water discharge device technology, specifically to a negative pressure water discharge device. Background Technology

[0002] Currently, coal mine gas drainage systems suffer from significant water and sediment buildup, frequently causing pipeline blockages, hindering drainage, increasing system negative pressure, increasing pumping motor torque, and drastically reducing drainage efficiency, thus seriously threatening safe production. Negative pressure water dischargers are indispensable automatic water discharge devices in coal mine gas drainage systems, suitable for automatic slag and water discharge from main pipes, trunk pipes, and branch pipes of gas redistribution and utilization systems. Dischargers can be connected in series or parallel in coal mining faces and tunneling face roadways, at the bottom of borehole risers and in low-lying areas of pipelines, as well as at surface gas drainage stations. Existing negative pressure water dischargers, lacking internal filtration structures, are prone to clogging during drainage, leading to equipment shutdowns and disrupting normal drainage operations. Therefore, a new negative pressure water discharger is urgently needed to solve these problems. Utility Model Content

[0003] To address the technical problem of existing negative pressure water dischargers, which are prone to clogging during drainage due to the lack of an internal filter structure, this invention provides a negative pressure water discharger that automatically discharges wastewater while simultaneously using a filter screen to intercept impurities in the wastewater, minimizing the risk of clogging the drain valve and causing the negative pressure water discharger to shut down. Operators can observe the filter screen through a transparent tank cover, and by removing the cover and filter screen, they can periodically disassemble and clean the filter screen, thus extending the lifespan of the negative pressure water discharger.

[0004] This utility model provides a negative pressure water discharge device, including a tank and a transparent tank cover detachably mounted on the tank. The tank is provided with a water inlet valve and a drain valve, and the transparent tank cover is provided with an air inlet valve and an air extraction valve. The water inlet valve and the air extraction valve are used for fixed connection with a gas extraction pipeline. A sealing plate is movably mounted inside the tank. The sealing plate is located directly below the air extraction valve and can seal or open the air extraction valve. A filter screen is detachably mounted inside the tank between the water inlet valve and the drain valve, and the sealing plate is located above the filter screen.

[0005] Furthermore, a slot is provided on the inner wall of the tank, and a screw is rotatably mounted in the slot. A boss is provided on the filter screen, and a screw hole is provided on the boss. The screw passes through the screw hole and is threadedly connected to the boss. The boss is located in the slot and moves up and down in the slot. The top of the screw passes through the slot and the transparent tank cover and is fixedly connected to the first nut. Loosening the first nut allows the transparent tank cover to be removed. The screw rotates, causing the boss to move upward until the boss leaves the top of the screw, allowing the filter screen to be removed for cleaning. Conversely, the top of the screw passes through the screw hole on the boss, and the screw rotates, causing the boss to move downward until the boss abuts the bottom of the slot. The top of the screw then passes through the transparent tank cover and is fixedly connected to the first nut. At this point, the transparent tank cover is fixed to the tank body, and the filter screen is fixed inside the tank body.

[0006] Furthermore, a guide block is provided in the slot, and a guide groove is provided on the boss. The guide block is engaged in the guide groove and moves up and down within the guide groove. When the screw is rotated, causing the boss to move up and down in the slot, the guide block also moves up and down in the guide groove. The cooperation between the guide block and the guide groove further ensures the stability of the boss's movement.

[0007] Furthermore, a fixed rod is fixedly installed on the air intake valve and the fixed rod is located inside the tank. A limit block is fixedly installed on the fixed rod and the limit block abuts against the filter screen. A movable sleeve is sleeved on the fixed rod and the movable sleeve moves up and down along the length direction of the fixed rod. A sealing plate and a float are fixedly installed on the movable sleeve. A first magnet is fixedly installed on the float. A second magnet is fixedly installed on the air intake valve. The first magnet and the second magnet are magnetically connected.

[0008] Furthermore, there are two of each of the following: an air intake valve, a fixed rod, a movable sleeve, a first magnet, and a second magnet. The two air intake valves are located on both sides in front of the suction valve. The two fixed rods and the second magnet are respectively fixedly mounted on the two air intake valves. A sealing plate and a float are fixedly mounted between the two movable sleeves. The two first magnets are both fixedly mounted on the float.

[0009] Furthermore, an inspection pipe is provided on the outside of the tank, and a flexible sealing head is provided inside the inspection pipe. A connecting rod is fixedly installed on the flexible sealing head. The end of the connecting rod extends out of the inspection pipe and is detachably connected to a connecting plate, which contacts the inspection pipe. By removing the connecting plate, the flexible sealing head can be pulled out from inside the inspection pipe via the connecting rod, allowing personnel to inspect the inside of the tank. Conversely, personnel can insert the flexible sealing head into the inspection pipe via the connecting rod to seal it and prevent wastewater leakage. Then, the end of the connecting rod extends out of the inspection pipe and is fixedly connected to the connecting plate, which contacts the inspection pipe, thus fixing the flexible sealing head inside the inspection pipe.

[0010] Furthermore, the connecting plate is provided with a connecting hole, and the end of the connecting rod passes through the connecting hole and is fixedly connected to the second nut. Loosening the second nut allows the connecting plate to be removed; conversely, when the connecting rod is fixedly connected to the second nut, the connecting plate contacts the inspection tube, and the flexible sealing head is fixed inside the inspection tube.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This invention relates to a negative pressure water drainer. When the sealing plate seals the air extraction valve, external atmosphere enters the tank through the air inlet valve. Under the influence of the external atmosphere, wastewater inside the tank passes through a filter screen and is discharged from the drain valve. The filter screen intercepts impurities in the wastewater, minimizing the risk of clogging the drain valve. When the sealing plate opens the air extraction valve, the tank returns to a negative pressure state, preventing external atmosphere from entering the tank through the air inlet valve. Wastewater from the gas extraction pipeline continues to be pumped into the tank.

[0013] The negative pressure drain valve automatically discharges wastewater while its filter screen intercepts impurities (such as coal slag) from the wastewater, minimizing clogging of the drain valve and preventing shutdown. Workers can observe the filter screen through the transparent lid. Removing the lid and filter screen allows for regular cleaning, extending the lifespan of the negative pressure drain valve. Attached Figure Description

[0014] Figure 1 This is a cross-sectional structural schematic diagram of a negative pressure water discharge device according to Embodiment 1 of this utility model;

[0015] Figure 2 This is a utility model Figure 1 Enlarged structural diagram of A in the middle;

[0016] Figure 3 This is a utility model Figure 1 Enlarged structural diagram of B in the middle;

[0017] Figure 4 This is a utility model Figure 1 Enlarged schematic diagram of the structure of C;

[0018] Figure 5 This is a cross-sectional view of a negative pressure water discharge device according to Embodiment 2 of this utility model;

[0019] The numbers in the attached diagram are:

[0020] 1. Tank body; 11. Inlet valve; 12. Drain valve; 13. Guide block; 14. Inspection pipe; 141. Flexible sealing head; 142. Connecting rod; 143. Connecting plate; 2. Transparent tank cover; 21. Air inlet valve; 22. Air extraction valve; 3. Sealing plate; 4. Filter screen; 41. Boss; 5. Screw; 6. Fixing rod; 61. Limiting block; 62. Movable sleeve; 7. Float; 8. First magnet; 9. Second magnet. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1 to 4 As shown in Embodiment 1, a negative pressure water drainer includes a tank body 1 and a detachable transparent tank cover 2 mounted on the tank body 1. The tank body 1 and the tank cover are made of acid- and alkali-resistant materials and are lightweight. The tank body 1 is equipped with an inlet valve 11 and a drain valve 12, with the inlet valve 11 located above the drain valve 12. The transparent tank cover 2 is equipped with an air inlet valve 21 and an air extraction valve 22. The inlet valve 11 and the air extraction valve 22 are used for fixed connection with a gas extraction pipeline. The air inlet valve 21 allows external air to enter the tank body 1. A sealing plate 3 is movably mounted inside the tank body 1. The sealing plate 3 is located directly below the air extraction valve 22 and can seal or open the air extraction valve 22. A filter screen 4 is detachably mounted inside the tank body 1 between the inlet valve 11 and the drain valve 12, with the sealing plate 3 located above the filter screen 4. The inlet valve 11, outlet valve 12, inlet valve 21, and exhaust valve 22 are all one-way valves. When using the negative pressure drain device, it should be installed on a flat working surface and kept horizontal. The inlet valve 11 and exhaust valve 22 should be fixedly connected to the gas extraction pipeline. In this embodiment, the volume of tank 1 is 0.047 cubic meters. The wastewater temperature is between 10 and 60 degrees Celsius, and the automatic wastewater discharge rate is ≥5L / time.

[0023] During the operation of the negative pressure drainer, because the gas extraction pipeline is under negative pressure, the connected tank 1 is also under negative pressure, allowing wastewater from the gas extraction pipeline to be pumped into the tank 1. The sealing plate 3 seals or opens the air extraction valve 22 based on the height of the wastewater entering the tank 1.

[0024] When the sealing plate 3 seals the exhaust valve 22, external air enters the tank 1 through the inlet valve 21. Under the influence of the external air, the wastewater inside the tank 1 is discharged from the drain valve 12 after passing through the filter screen 4. The filter screen 4 intercepts impurities (such as coal slag) in the wastewater, minimizing the risk of impurities clogging the drain valve 12 and preventing the negative pressure drainer from shutting down. When the sealing plate 3 opens the exhaust valve 22, the tank 1 returns to a negative pressure state, and external air cannot enter the tank 1 through the inlet valve 21. The wastewater in the gas extraction pipeline continues to be pumped into the tank 1.

[0025] Workers can observe the condition of the filter screen 4 and the wastewater level inside the tank 1 through the transparent tank cover 2. After removing the transparent tank cover 2 and the filter screen 4, workers can periodically disassemble and clean the filter screen 4, extending the service life of the negative pressure drainer. When the negative pressure drainer is in operation, the filter screen 4 is installed inside the tank 1, and the transparent tank cover 2 is fixed to the tank 1.

[0026] The negative pressure drainer in this embodiment automatically discharges wastewater, reducing the labor intensity of staff and saving labor and effort. At the same time, the filter screen 4 intercepts impurities (such as coal slag) in the wastewater, preventing impurities from clogging the drain valve 12 and avoiding shutdown of the negative pressure drainer. Staff can also observe the condition of the filter screen 4 through the transparent tank cover 2, and regularly disassemble and clean the filter screen 4 to improve the service life of the negative pressure drainer.

[0027] In one possible implementation, a slot is provided on the inner wall of the tank 1, and a screw 5 is rotatably mounted in the slot. A boss 41 is provided on the filter screen 4, and a screw hole is provided on the boss 41. The screw 5 passes through the screw hole and is threadedly connected to the boss 41. The boss 41 is located in the slot and can move up and down within the slot. The slot limits the position of the boss 41 while ensuring that it can move up and down. The top of the screw 5 passes through the slot and the transparent tank cover 2 and is fixedly connected to the first nut. Rotating the screw 5 causes the boss 41 to move up and down within the slot, that is, the boss 41 moves along the length of the screw 5. Loosening the first nut allows the transparent tank cover 2 to be removed. The rotation of the screw 5 causes the boss 41 to move upwards until the boss 41 leaves the top of the screw 5, thus removing the filter screen 4 for cleaning. Conversely, the top of the screw 5 passes through the screw hole on the boss 41. The rotation of the screw 5 causes the boss 41 to move downwards until the boss 41 abuts against the bottom of the slot. The top of the screw 5 then passes through the transparent can lid 2 and is fixedly connected to the first nut. At this time, the transparent can lid 2 is fixed to the can body 1, and the filter screen 4 is fixed inside the can body 1. The transparent can lid 2 has a through hole, and the top of the screw 5 passes through the through hole in the transparent can lid 2 and is fixedly connected to the first nut.

[0028] Furthermore, a bearing seat is provided in the slot, and the bottom of the screw 5 is fixedly connected to the bearing in the bearing seat, so that the screw 5 can rotate through the bearing.

[0029] In one possible implementation, a guide block 13 is provided in the slot, and a guide groove is provided on the boss 41. The guide block 13 is engaged in the guide groove and moves up and down within the guide groove. When the screw 5 is rotated, causing the boss 41 to move up and down in the slot, the guide block 13 also moves up and down in the guide groove. The cooperation between the guide block 13 and the guide groove further ensures the stability of the movement of the boss 41.

[0030] In one possible implementation, a fixing rod 6 is fixedly installed at the bottom of the intake valve 21, and the fixing rod 6 is located inside the tank body 1. A limiting block 61 is fixedly installed on the fixing rod 6, and the limiting block 61 abuts against the filter screen 4. A movable sleeve 62 is sleeved on the fixing rod 6, and the movable sleeve 62 moves up and down along the length direction of the fixing rod 6. The movable sleeve 62 is located above the limiting block 61, and the limiting block 61 limits the range of movement of the movable sleeve 62. A sealing plate 3 and a float 7 are fixedly installed on the movable sleeve 62. A first magnet 8 is fixedly installed on the float 7. A second magnet 9 is fixedly installed at the bottom of the intake valve 21, and the first magnet 8 and the second magnet 9 are magnetically connected. Preferably, the size and dimensions of the first magnet 8 and the second magnet 9 are set and adjusted according to actual needs. In this embodiment, the positions of the first magnet 8 and the second magnet 9 correspond. It should be noted that the fixing rod 6 and the second magnet 9 are installed at the bottom of the intake valve 21 and do not affect the normal operation of the intake valve 21.

[0031] The inside of tank 1 is under negative pressure, allowing wastewater from the gas extraction pipeline to be pumped into tank 1. The sealing plate 3 controls the sealing or opening of the air extraction valve 22 based on the height of the wastewater entering tank 1.

[0032] As the wastewater level rises, the float 7 floats up and its position increases. The movable sleeve 62 moves upward on the fixed rod 6, and the sealing plate 3 also moves upward. When the float 7 floats to a position where the first magnet 8 and the second magnet 9 are magnetically connected, the sealing plate 3 is located directly below the bottom of the suction valve 22, sealing the bottom of the suction valve 22. After the sealing plate 3 seals the suction valve 22, external air enters the tank 1 through the air inlet valve 21. Under the action of the external air, the wastewater inside the tank 1 is discharged from the drain valve 12 after passing through the filter screen 4.

[0033] As the wastewater inside tank 1 is discharged and its height decreases, the float 7 descends under the influence of the wastewater. The movable sleeve 62 moves downwards on the fixed rod 6, separating the first magnet 8 and the second magnet 9. The sealing plate 3 also moves downwards, opening the bottom of the suction valve 22. Once the sealing plate 3 opens the suction valve 22, the inside of tank 1 returns to a negative pressure state, preventing external air from entering the tank 1 through the air inlet valve 21. Wastewater from the gas extraction pipeline continues to be pumped into the tank 1.

[0034] The limiting block 61 rests against the filter screen 4. The limiting block 61 does not affect the operation of the filter screen 4. At the same time, the limiting block 61 keeps the fixing rod 6 stable and prevents the fixing rod 6 from shifting, which would cause the sealing plate 3 to fail to seal the air extraction valve 22.

[0035] Generally, the negative pressure water discharge device is installed on a flat working surface and kept horizontal, without tilting it, to reduce frictional resistance during the rise of the float 7. The size of the float 7 is set according to actual needs to ensure that the sealing plate 3 can move up and down.

[0036] In one possible implementation, an inspection pipe 14 is provided on the outside of the tank body 1, and a flexible sealing head 141 is provided inside the inspection pipe 14. A connecting rod 142 is fixedly provided on the flexible sealing head 141, and the end of the connecting rod 142 extends to the outside of the inspection pipe 14 and is detachably connected to a connecting plate 143. The connecting plate 143 contacts the inspection pipe 14.

[0037] The connecting plate 143 is removed, and the flexible sealing head 141 can be pulled out from inside the inspection tube 14 via the connecting rod 142, allowing workers to inspect the inside of the tank 1. Conversely, workers can insert the flexible sealing head 141 into the inspection tube 14 via the connecting rod 142, after which the end of the connecting rod 142 extends to the outside of the inspection tube 14 and is fixedly connected to the connecting plate 143. The connecting plate 143 contacts the inspection tube 14, thus fixing the flexible sealing head 141 inside the inspection tube 14. The flexible sealing head 141 seals the inspection tube 14, preventing wastewater leakage from the inspection tube 14.

[0038] Furthermore, the connecting plate 143 is provided with a connecting hole, and the end of the connecting rod 142 passes through the connecting hole and is fixedly connected to the second nut. Loosening the second nut allows the connecting plate 143 to be removed; conversely, when the connecting rod 142 is fixedly connected to the second nut, the connecting plate 143 contacts the inspection tube 14, and the flexible sealing head 141 is fixed inside the inspection tube 14.

[0039] like Figure 5 As shown in Embodiment 2, a negative pressure water discharge device differs from Embodiment 1 in that it has two air inlet valves 21, two fixed rods 6, two movable sleeves 62, two first magnets 8 and two second magnets 9. The two air inlet valves 21 are located on both sides in front of the suction valve 22. The two fixed rods 6 and the two second magnets 9 are respectively fixedly installed at the bottom of the two air inlet valves 21. A sealing plate 3 and a float 7 are fixedly installed between the two movable sleeves 62. The sealing plate 3 is located on the rear side of the float 7. The two first magnets 8 are both fixedly installed on the float 7.

[0040] As the wastewater level rises, the float 7 floats up and its position increases. The two movable sleeves 62 move upward on the two fixed rods 6 respectively, and the sealing plate 3 also moves upward. When the float 7 floats to the point where the two first magnets 8 and the two second magnets 9 are magnetically connected, the sealing plate 3 is located directly below the bottom of the air extraction valve 22, and the sealing plate 3 seals the bottom of the air extraction valve 22.

[0041] As the wastewater inside tank 1 is discharged and the wastewater level decreases, the float 7 descends under the influence of the wastewater. The two movable sleeves 62 move downward on the two fixed rods 6 respectively, the two first magnets 8 separate from the two second magnets 9 respectively, and the sealing plate 3 also moves downward. At this time, the sealing plate 3 opens the bottom of the air extraction valve 22.

[0042] The embodiments described above are merely preferred embodiments of this utility model and are only used to explain this utility model. They are not intended to limit the scope of implementation of this utility model. For those skilled in the art, other implementation methods can be easily made by substitution or modification based on the technical content disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A negative pressure water discharge device, comprising a tank (1) and a transparent tank cover (2) detachably disposed on the tank (1), wherein the tank (1) is provided with a water inlet valve (11) and a drain valve (12), and the transparent tank cover (2) is provided with an air inlet valve (21) and an air extraction valve (22), wherein the water inlet valve (11) and the air extraction valve (22) are used for fixed connection with a gas extraction pipeline, characterized in that, The tank (1) is equipped with a sealing plate (3) inside. The sealing plate (3) is located directly below the air extraction valve (22) and can seal or open the air extraction valve (22). The tank (1) is equipped with a filter screen (4) located between the water inlet valve (11) and the drain valve (12) inside. The sealing plate (3) is located above the filter screen (4).

2. The negative pressure water discharge device according to claim 1, characterized in that, The inner wall of the tank (1) is provided with a slot, and a screw (5) is rotatably provided in the slot. The filter screen (4) is provided with a boss (41), and a screw hole is provided on the boss (41). The screw (5) passes through the screw hole and is threadedly connected to the boss (41). The boss (41) is located in the slot and moves up and down in the slot. The top of the screw (5) passes through the slot and the transparent tank cover (2) and is fixedly connected to the first nut.

3. The negative pressure water discharge device according to claim 2, characterized in that, A guide block (13) is provided in the slot, and a guide groove is provided on the boss (41). The guide block (13) is inserted into the guide groove and moves up and down in the guide groove.

4. The negative pressure water discharge device according to claim 1, characterized in that, A fixed rod (6) is fixedly installed on the air intake valve (21) and the fixed rod (6) is located inside the tank body (1). A limit block (61) is fixedly installed on the fixed rod (6) and the limit block (61) abuts against the filter screen (4). A movable sleeve (62) is sleeved on the fixed rod (6) and the movable sleeve (62) moves up and down along the length direction of the fixed rod (6). A sealing plate (3) and a float (7) are fixedly installed on the movable sleeve (62). A first magnet (8) is fixedly installed on the float (7). A second magnet (9) is fixedly installed on the air intake valve (21). The first magnet (8) and the second magnet (9) are magnetically connected.

5. The negative pressure water discharge device according to claim 4, characterized in that, Two of each of the following components are provided: an air intake valve (21), a fixed rod (6), a movable sleeve (62), a first magnet (8), and a second magnet (9). The two air intake valves (21) are located on both sides in front of the air extraction valve (22). The two fixed rods (6) and the second magnet (9) are respectively fixedly mounted on the two air intake valves (21). A sealing plate (3) and a float (7) are fixedly mounted between the two movable sleeves (62). The two first magnets (8) are both fixedly mounted on the float (7).

6. The negative pressure water discharge device according to claim 1, characterized in that, The tank body (1) is provided with an inspection pipe (14) on the outside. A flexible sealing head (141) is provided inside the inspection pipe (14). A connecting rod (142) is fixedly provided on the flexible sealing head (141). The end of the connecting rod (142) extends to the outside of the inspection pipe (14) and is detachably connected to the connecting plate (143). The connecting plate (143) is in contact with the inspection pipe (14).

7. The negative pressure water discharge device according to claim 6, characterized in that, The connecting plate (143) is provided with a connecting hole, and the end of the connecting rod (142) passes through the connecting hole and is fixedly connected with the second nut.

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