Mining negative pressure automatic water discharging device

Abstract

The utility model relates to a mining negative pressure automatic water discharging device, and belongs to the technical field of water discharging devices. Comprising a water discharging tank, the water discharging tank is of a closed square tank body structure and is composed of a top plate, a bottom plate and side walls on the periphery, the bottom plate of the water discharging tank is composed of a slag discharging plate in the middle and transition inclined plates on the periphery, a slag discharging opening is formed in the center of the slag discharging plate, and a slag discharging mechanism is arranged at the slag discharging opening. The deslagging mechanism comprises a fixing plate, a limiting block and a pressing plate which are sequentially distributed from top to bottom, the limiting block is of a U-shaped plate-shaped structure, a flashboard is slidably inserted into a U-shaped opening of the limiting block, a fixing bolt sequentially penetrates through the pressing plate and the limiting block upwards and then is in threaded connection with the fixing plate, and the outer side of a screw rod of the fixing bolt is sleeved with a compression spring. The upper end and the lower end of the compression spring make contact with the lower end face of the pressing plate and bolt heads of the fixing bolts correspondingly. The problems that an existing automatic water discharging device is complex in structure and prone to being blocked by coal cinder are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water dischargers, and in particular relates to a negative pressure automatic water discharger for mining. Background Art

[0002] The air pressure in the coal mine extraction (discharge) pipeline is lower than the atmospheric pressure (i.e., it is a negative pressure pipeline), so water can easily enter the pipeline during the extraction process. A water discharger is needed to discharge the accumulated water in the pipeline to ensure the normal extraction and work safety. The water dischargers currently used mainly include manual water dischargers and automatic water dischargers. Manual water dischargers are time-consuming and labor-intensive, with low work efficiency, and will cause blockage of the extraction pipe due to untimely water discharge; automatic water dischargers are all fully automatic water discharges through mechanical operation, and most of them have complex structures and many mechanical devices, which increases the failure rate of automatic water dischargers; at the same time, water and gas in the extraction and discharge pipelines will carry a certain amount of coal slag. After the coal slag accumulates to a certain extent, it is easy to block the water outlet of the automatic water discharger, causing the water discharger to fail. Utility Model Content

[0003] The utility model overcomes the shortcomings of the prior art and provides a negative pressure automatic water discharger for mining, thereby solving the problem that the current automatic water discharger has a complex structure and is easily blocked by coal slag.

[0004] In order to achieve the above purpose, the utility model is implemented through the following technical solutions.

[0005] A negative pressure automatic water discharger for mining comprises a water discharge tank, which is a closed square box structure, consisting of a top plate, a bottom plate and surrounding side walls, the bottom plate of the water discharge tank consists of a slag discharge plate in the middle and transition inclined plates on all sides, a slag discharge port is arranged at the center of the slag discharge plate, a slag discharge mechanism is arranged at the slag discharge port, the slag discharge mechanism comprises a fixed plate, a limit block and a pressure plate which are sequentially distributed up and down, the limit block is a U-shaped plate structure, a gate plate is slidably inserted inside the U-shaped opening of the limit block, the fixing bolt passes through the pressure plate and the limit block in sequence upwards and is screwed to the fixing plate, a clamping spring is sleeved on the outside of the screw rod of the fixing bolt, and the upper and lower ends of the clamping spring are respectively in contact with the lower end surface of the pressure plate and the bolt head of the fixing bolt.

[0006] Furthermore, the slag discharge plate is a horizontally arranged square plate structure, which is located at the lowest point of the water discharge tank. The edges of the slag discharge plate are fixedly connected to the lower edges of the surrounding side walls of the water discharge tank through four inclined transition inclined plates.

[0007] Furthermore, a vertical supporting leg is fixedly provided at the four corners of the lower end of the water tank; a handle is fixedly provided at the center of the upper end surface of the water tank; a circular observation window connected inside and outside is respectively provided at the center of the side walls on the front and rear sides of the water tank, and an observation cover is fixedly provided on each observation window.

[0008] Furthermore, the fixing plate is a horizontally arranged square plate-like structure, a central through hole connected up and down is arranged at the center of the fixing plate, and a plurality of symmetrical threaded holes are arranged at the left and right ends of the lower end surface of the fixing plate; a plurality of symmetrical through holes are arranged at the left and right ends of the lower end surface of the limit block; a pressing plate is respectively arranged at the left and right edges of the lower end of the limit block, and the pressing plate is a horizontally arranged square plate-like structure, and a plurality of through holes arranged front and back are arranged on each pressing plate; the gap between the two pressing plates, the U-shaped opening of the limit block, the central through hole on the fixing plate, and the slag discharge port correspond to each other up and down, and the through holes on the pressing plate, the through holes on the limit block, and the threaded holes on the fixing plate correspond to each other one by one; a plurality of fixing bolts respectively pass through the through holes on the pressing plate and the through holes on the limit block in turn, and are screwed into the threaded holes on the fixing plate.

[0009] Furthermore, an annular groove is provided on the lower end surface of the fixed plate, and a first sealing ring is fixedly provided inside the annular groove. The first sealing ring is provided around the central through hole on the fixed plate, and the first sealing ring is located inside the U-shaped opening of the limit block; the upper and lower end surfaces of the gate plate are respectively in close contact with the first sealing ring and the upper end surface of the pressure plate.

[0010] Furthermore, a water inlet is provided at the upper end of the left side wall of the water drain tank, a drain outlet is provided at the lower end of the left side wall of the water drain tank, a water inlet pipe is fixedly provided inside the water inlet, and a drain pipe is fixedly provided inside the drain outlet; a one-way valve is respectively inserted at the inner end of the water inlet pipe and the outer end of the drain pipe.

[0011] Furthermore, the one-way valve includes a plug-in cylinder and a plug cover, one end of the plug-in cylinder is plugged into the inner end of the water inlet pipe and the inner end of the drain pipe, and the other end of the plug-in cylinder is hinged with the plug cover; the plug-in cylinder is a cylindrical structure open at both ends, and a plurality of second sealing rings are provided on the outer side of the opening at one end of the plug-in cylinder; the plug cover is hinged on the outer side of the opening at the other end of the plug-in cylinder, the upper end of the plug cover is hinged to the upper end of the opening of the plug-in cylinder, and the upper end of the plug cover is inclined toward the opening at one end of the plug-in cylinder where the second sealing ring is provided.

[0012] Furthermore, a reversing valve is arranged at the upper end of the water drain tank, the reversing valve includes a valve seat and a valve stem, the valve seat is fixedly arranged at the upper end of the water drain tank, a vertical plug-in hole is arranged on the lower end surface of the valve seat, and the upper end of the valve stem is slidably plugged into the plug-in hole of the valve seat along the vertical direction; a negative pressure interface and a normal pressure interface are arranged on one side surface of the valve seat, and both the negative pressure interface and the normal pressure interface are connected with the inside of the plug-in hole; a connecting pipe is arranged inside the valve stem, an inner end opening of the connecting pipe is located inside the plug-in hole, and an outer end opening of the connecting pipe is located inside the water drain tank; when the valve stem is at the highest point in the plug-in hole, an inner end opening of the connecting pipe inside the valve stem is connected with the normal pressure interface of the valve seat; when the valve stem is at the lowest point in the plug-in hole, an inner end opening of the connecting pipe inside the valve stem is connected with the negative pressure interface of the valve seat.

[0013] Furthermore, a negative pressure tube is arranged at the negative pressure interface of the valve seat, one end of the negative pressure tube is fixedly connected to the negative pressure interface, and the other end of the negative pressure tube is connected to the inside of the water inlet pipe; an atmospheric valve is fixedly arranged on the top plate of the water drain tank, and the atmospheric valve is connected to the outside of the water drain tank; a normal pressure tube is arranged at the normal pressure interface of the valve seat, one end of the normal pressure tube is fixedly connected to the normal pressure interface, and the other end of the normal pressure tube is connected to the atmospheric valve.

[0014] Furthermore, a horizontal mounting plate is fixedly provided on the lower end surface of the valve seat, and two vertical guide rods are fixedly provided on the mounting plate; a same float is slidably sleeved on the two guide rods, the density of the float is less than the density of water, and the upper end surface of the float is connected to the lower end of the valve stem by a chain.

[0015] The beneficial effects of the utility model compared with the prior art are:

[0016] The utility model provides a negative pressure automatic water discharger for mining, wherein a slag discharge plate for accumulating coal slag is arranged at the inner lower end of a water discharge tank, so that the coal slag can be deposited on the slag discharge plate to prevent the coal slag from clogging a one-way valve at a drainage pipe; a pull-out gate plate is arranged on the slag discharge plate to facilitate the discharge of coal slag at any time; the close contact between the pressure plate and the limit block and the fixed plate is ensured by the rebound force of the compression spring, and the sealing of the slag discharge port is ensured by the first sealing ring; the reversing valve has a simple structure and high stability, which greatly reduces the failure rate of the automatic water discharger; the water discharger shell is made of 304 stainless steel, and the internal accessories are all made of 304 stainless steel and plastic parts, which have good corrosion resistance and strong stability, so that the water discharger can work stably and effectively for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0018] Figure 1It is a front view of the utility model as a whole;

[0019] Figure 2 It is a bottom view of the utility model as a whole;

[0020] Figure 3 It is a side sectional view of the utility model;

[0021] Figure 4 yes Figure 3 A local enlarged schematic diagram of the middle A;

[0022] Figure 5 yes Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0023] Figure 6 It is a front cross-sectional view of the utility model;

[0024] Figure 7 yes Figure 6 A partial enlarged schematic diagram of point C in the middle;

[0025] Figure 8 yes Figure 6 A schematic diagram of the structure of the one-way valve in FIG.

[0026] Among them, 1 is a water discharge tank, 2 is a slag discharge plate, 3 is a transition inclined plate, 4 is a supporting leg, 5 is a handle, 6 is an observation cover plate, 7 is a slag discharge port, 8 is a fixed plate, 9 is a limit block, 10 is a pressure plate, 11 is a gate plate, 12 is a first sealing ring, 13 is a fixing bolt, 14 is a compression spring, 15 is a water inlet pipe, 16 is a drain pipe, 17 is a one-way valve, 18 is a plug-in cylinder, 19 is a plug cover, 20 is a second sealing ring, 21 is a positioning ring, 22 is a sealing gasket, 23 is a valve seat, 24 is a valve stem, 25 is a negative pressure interface, 26 is a normal pressure interface, 27 is an atmospheric valve, 28 is a negative pressure pipe, 29 is a normal pressure pipe, 30 is a mounting plate, 31 is a guide rod, 32 is a float, and 33 is a chain. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail in combination with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solution of the present invention is described in detail below in combination with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0028] like Figure 1As shown in FIG. 8 , the utility model provides a negative pressure automatic water discharger for mining, including a water discharge box 1, which is a closed square box structure, consisting of a top plate, a bottom plate and surrounding side walls. The bottom plate of the water discharge box 1 is composed of a slag discharge plate 2 in the middle and transition inclined plates 3 on all sides. The slag discharge plate 2 is a horizontally arranged square plate-shaped structure, and the slag discharge plate 2 is located at the lowest point of the water discharge box 1. The edges of the slag discharge plate 2 are fixedly connected to the lower edges of the surrounding side walls of the water discharge box 1 through four inclined transition inclined plates 3.

[0029] A vertical support leg 4 is fixedly provided at each of the four corners of the lower end of the water tank 1, and the water tank 1 is supported by the four support legs 4. A handle 5 is fixedly provided at the center of the upper end surface of the water tank 1, and the water tank 1 is moved by the handle 5. A circular observation window connected inside and outside is provided at the center of the side walls on the front and rear sides of the water tank 1, and an observation cover 6 is fixedly provided on each observation window. The observation cover 6 is made of transparent acrylic material and is fixed to the observation window of the water tank 1 by a circle of fixing screws in a circular array.

[0030] A slag discharge port 7 is arranged at the center of the slag discharge plate 2, and a slag discharge mechanism is arranged at the slag discharge port 7. The slag discharge mechanism includes a fixed plate 8, a pressure plate 10, a gate plate 11, a stopper block 9, a first sealing ring 12, a fixing bolt 13, and a compression spring 14. A fixed plate 8 is fixedly arranged at the lower end of the slag discharge port 7. The fixed plate 8 is a horizontally arranged square plate-like structure. A central through hole connected up and down is arranged at the center of the fixed plate 8. A plurality of symmetrical threaded holes are arranged at the left and right ends of the lower end surface of the fixed plate 8. A stopper block 9 is arranged at the lower end of the fixed plate 8. The stopper block 9 is a horizontally arranged U-shaped plate-like structure. The U-shaped opening of the stopper block 9 faces the front side, and a plurality of symmetrical through holes are arranged at the left and right ends of the lower end surface of the stopper block 9. A pressure plate 10 is arranged at the left and right edges of the lower end of the stopper block 9, respectively. The pressure plate 10 is a horizontally arranged square plate-like structure, and a plurality of through holes arranged front and back are arranged on each pressure plate 10. The gap between the two pressing plates 10, the U-shaped opening of the limit block 9, the central through hole on the fixed plate 8, and the slag discharge port 7 correspond to each other from top to bottom. The through hole on the pressing plate 10, the through hole on the limit block 9, and the threaded hole on the fixed plate 8 correspond to each other. An annular groove is provided on the lower end surface of the fixed plate 8, and a first sealing ring 12 is fixedly provided inside the annular groove. The first sealing ring 12 is provided around the central through hole on the fixed plate 8, and the first sealing ring 12 is located inside the U-shaped opening of the limit block 9. A plurality of fixing bolts 13 pass through the through hole on the pressing plate 10 and the through hole on the limit block 9 in sequence, and then are screwed to the threaded hole on the fixed plate 8. A compression spring 14 is sleeved on the outer side of the screw of the fixing bolt 13. The upper and lower ends of the compression spring 14 are in contact with the lower end surface of the pressing plate 10 and the bolt head of the fixing bolt 13 respectively. The resilience of the compression spring 14 ensures that the pressing plate 10 and the limit block 9 are in close contact with the fixed plate 8. A gate plate 11 is slidably inserted into the U-shaped opening of the limit block 9 , and the upper and lower end surfaces of the gate plate 11 are in close contact with the first sealing ring 12 and the upper end surface of the pressure plate 10 respectively.

[0031] A water inlet is provided at the upper end of the left side wall of the water tank 1, and a drain outlet is provided at the lower end of the left side wall of the water tank 1. A water inlet pipe 15 is fixedly provided inside the water inlet, and a drain outlet is fixedly provided inside the drain outlet. A one-way valve 17 is respectively plugged into the inner end of the water inlet pipe 15 and the outer end of the drain outlet 16. The one-way valve 17 includes a plug-in cylinder 18 and a plug cover 19. One end of the plug-in cylinder 18 is plugged into the inner end of the water inlet pipe 15 and the inner end of the drain outlet 16, and the plug cover 19 is hinged to the other end of the plug-in cylinder 18. The plug-in cylinder 18 is a cylindrical structure with two ends open. A plurality of annular grooves are provided on the outer side surface of one end of the opening of the plug-in cylinder 18. A second sealing ring 20 is sleeved inside each annular groove. A positioning ring 21 is fixedly provided in the middle of the outer side surface of the plug-in cylinder 18. One end of the plug-in tube 18 provided with a second sealing ring 20 is inserted into the inner end of the water inlet pipe 15 and the inner end of the drain pipe 16. The second sealing ring 20 is tightly pressed against the inner wall of the water inlet pipe 15 and the drain pipe 16. The second sealing ring 20 ensures the sealing of the connection and also ensures that the plug-in tube 18 will not accidentally fall out of the water inlet pipe 15 and the drain pipe 16. The positioning ring 21 on the outside of the plug-in tube 18 contacts the inner end opening of the water inlet pipe 15 and the outer end opening of the drain pipe 16, and the plug-in tube 18 is positioned by the positioning ring 21. The plugging cover 19 is hinged on the outer side of the opening at the other end of the plug-in tube 18, and the opening of the plug-in tube 18 is closed by the plugging cover 19. The upper end of the plugging cover 19 is hinged to the upper end of the opening of the plug-in tube 18, and the upper end of the plugging cover 19 is inclined toward the opening of one end of the plug-in tube 18 where the second sealing ring 20 is provided. A sealing gasket 22 is clamped on the end face of the plugging cover 19 close to the plug-in tube 18, and the sealing between the plugging cover 19 and the plug-in tube 18 is ensured by the sealing gasket 22.

[0032] A reversing valve is arranged at the upper end of the drain tank 1, and the reversing valve includes a valve seat 23 and a valve stem 24. The valve seat 23 is fixedly arranged at the upper end of the drain tank 1, and a vertical plug hole is arranged at the lower end surface of the valve seat 23. The upper end of the valve stem 24 is slidably plugged into the plug hole of the valve seat 23 along the vertical direction. A negative pressure interface 25 and a normal pressure interface 26 are arranged on one side of the valve seat 23, and both the negative pressure interface 25 and the normal pressure interface 26 are connected to the inside of the plug hole. A connecting pipe is arranged inside the valve stem 24, and the inner end opening of the connecting pipe is located inside the plug hole, and the outer end opening of the connecting pipe is located inside the drain tank 1. An anti-slip ring is fixedly arranged on the valve stem 24, and the anti-slip ring is used to prevent the valve stem 24 from slipping out of the plug hole of the valve seat 23. When the valve stem 24 is at the highest point in the plug-in hole, the inner end opening of the connecting pipe inside the valve stem 24 is connected to the normal pressure interface 26 of the valve seat 23; when the valve stem 24 is at the lowest point in the plug-in hole, the inner end opening of the connecting pipe inside the valve stem 24 is connected to the negative pressure interface 25 of the valve seat 23.

[0033] A negative pressure pipe 28 is provided at the negative pressure interface 25 of the valve seat 23, one end of the negative pressure pipe 28 is fixedly connected to the negative pressure interface 25, and the other end of the negative pressure pipe 28 is connected to the inside of the water inlet pipe 15. An atmospheric valve 27 is fixedly provided on the top plate of the water drain tank 1, and the atmospheric valve 27 is connected to the outside of the water drain tank 1. A normal pressure pipe 29 is provided at the normal pressure interface 26 of the valve seat 23, one end of the normal pressure pipe 29 is fixedly connected to the normal pressure interface 26, and the other end of the normal pressure pipe 29 is connected to the atmospheric valve 27.

[0034] A horizontal mounting plate 30 is fixedly arranged on the lower end surface of the valve seat 23, and two vertical guide rods 31 are fixedly arranged on the mounting plate 30. A same buoy 32 is slidably sleeved on the two guide rods 31, and the density of the buoy 32 is less than the density of water. The upper end surface of the buoy 32 is connected to the lower end of the valve stem 24 through a chain 33.

[0035] The water discharge tank 1 is made of stainless steel 304, and the internal accessories of the water discharge tank 1 are made of stainless steel 304 and plastic.

[0036] The working principle of the utility model is:

[0037] The water inlet pipe 15 on the drain tank 1 is connected to the extraction pipe in the coal mine. At this time, the extraction pipe in the coal mine is in a negative pressure state, so that the inside of the water inlet pipe 15 on the drain tank 1 is also in a negative pressure state. When there is no water in the drain tank 1, the float 32 is in the lowest position due to gravity, and the float 32 also pulls the valve stem 24 down to the lowest position through the chain 33. At this time, the inner end opening of the connecting pipe inside the valve stem 24 is connected to the negative pressure interface 25 of the valve seat 23. Through the negative pressure pipe 28 and the connecting pipe inside the valve stem 24, the inside of the drain tank 1 is connected to the inside of the water inlet pipe 15 and both are in a negative pressure state, so that the water inside the extraction pipe in the coal mine can push open the plug cover 19 of the one-way valve 17 on the water inlet pipe 15 and flow into the drain tank 1. Since the outer side of the one-way valve 17 at the drain pipe 16 is at normal pressure, while the inner side of the one-way valve 17 at the drain pipe 16 is at negative pressure, the pressure difference between the inside and the outside causes the plugging cover 19 of the one-way valve 17 at the drain pipe 16 to be tightly pressed against the plug-in tube 18, so that the water inside the pumping pipe cannot be discharged outward through the one-way valve 17 at the drain pipe 16.

[0038] As water continuously flows into the drain tank 1, the float 32 also rises as the water level rises. The rising float 32 gradually contacts the lower end of the valve stem 24 and lifts the valve stem 24 upward, so that the inner end opening of the connecting pipe inside the valve stem 24 is connected to the normal pressure interface 26 of the valve seat 23. Through the normal pressure pipe 29 and the connecting pipe inside the valve stem 24, the inside of the drain tank 1 is connected to the outside atmosphere, so that the inside of the drain tank 1 is in a normal pressure state, while the inside of the water inlet pipe 15 is still in a negative pressure state. Due to the pressure difference between the inside and outside of the one-way valve 17 at the water inlet pipe 15, the plug 19 of the one-way valve 17 at the water inlet pipe 15 is tightly pressed against the plug-in tube 18, so that the water inside the extraction pipe in the coal mine can no longer flow into the drain tank 1. At the same time, since both the inner and outer sides of the one-way valve 17 at the drain pipe 16 are at normal pressure, the water inside the drain tank 1 pushes open the one-way valve 17 at the drain pipe 16 and is discharged outward, the water level inside the drain tank 1 continues to drop, and the float 32 also continues to drop. When the float 32 drops to the lowest point, the valve stem 24 is also pulled down to the lowest point by the chain 33, so that the inner end opening of the connecting pipe inside the valve stem 24 is connected to the negative pressure interface 25 of the valve seat 23 again, so that the water inside the extraction pipe in the coal mine can push open the plug cover 19 of the one-way valve 17 on the water inlet pipe 15 again and flow into the drain tank 1.

[0039] The above process is continuously circulated, so that the water tank 1 can automatically store and drain water.

[0040] When the coal slag enters the drain tank 1 along with the water flow, it is continuously deposited on the slag discharge plate 2 at the bottom of the drain tank 1. When the coal slag deposited in the drain tank 1 needs to be discharged, the gate plate 11 only needs to be pulled outward, so that the deposited coal slag is discharged outward from the slag discharge port 7 and the central through hole on the fixed plate 8. After the coal slag is cleaned, the gate plate 11 is inserted again, and the rebound force of the compression spring 14 is used to ensure that the pressing plate 10 and the limit block 9 are in close contact with the fixed plate 8, and the first sealing ring 12 is used to ensure the sealing of the slag discharge port 7.

[0041] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A negative pressure automatic water discharger for mining, characterized in that: The invention comprises a water discharge box (1), wherein the water discharge box (1) is a closed square box structure, which is composed of a top plate, a bottom plate and surrounding side walls. The bottom plate of the water discharge box (1) is composed of a slag discharge plate (2) in the middle and transition inclined plates (3) on the surrounding sides. A slag discharge port (7) is arranged at the center of the slag discharge plate (2). A slag discharge mechanism is arranged at the slag discharge port (7). The slag discharge mechanism comprises a fixed plate (8), a limit block (9) and a pressure plate (10) which are sequentially distributed up and down. The limit block (9) is a U-shaped plate structure. A gate plate (11) is slidably inserted into the U-shaped opening of the limit block (9). The fixing bolt (13) passes through the pressure plate (10) and the limit block (9) in sequence upwards and is then screwed to the fixing plate (8). A compression spring (14) is sleeved on the outer side of the screw rod of the fixing bolt (13). The upper and lower ends of the compression spring (14) are respectively in contact with the lower end surface of the pressure plate (10) and the bolt head of the fixing bolt (13).

2. The negative pressure automatic water discharger for mining according to claim 1, characterized in that: The slag discharge plate (2) is a horizontally arranged square plate-shaped structure. The slag discharge plate (2) is located at the lowest point of the water discharge tank (1). The edges of the slag discharge plate (2) are fixedly connected to the lower edges of the surrounding side walls of the water discharge tank (1) via four inclined transition inclined plates (3).

3. The negative pressure automatic water discharger for mining according to claim 1, characterized in that: A vertical support leg (4) is fixedly provided at each of the four corners of the lower end of the water discharge tank (1); a handle (5) is fixedly provided at the center of the upper end surface of the water discharge tank (1); and a circular observation window communicating with the inside and outside is provided at the center of the side walls on both the front and rear sides of the water discharge tank (1), and an observation cover plate (6) is fixedly provided on each observation window.

4. The negative pressure automatic water discharger for mining according to claim 1, characterized in that: The fixing plate (8) is a horizontally arranged square plate-shaped structure. The fixing plate (8) is fixedly provided with the lower end of the slag discharge port (7). A central through hole communicating with each other from top to bottom is provided at the center of the fixing plate (8). A plurality of symmetrical threaded holes are provided at the left and right ends of the lower end surface of the fixing plate (8). A plurality of symmetrical through holes are provided at the left and right ends of the lower end surface of the limit block (9). A pressing plate (10) is provided at the left and right edges of the lower end of the limit block (9). The pressing plate (10) is a horizontally arranged square plate-shaped structure. The plate-like structure comprises a plurality of through holes arranged in a front-to-rear manner on each pressing plate (10); the gap between the two pressing plates (10), the U-shaped opening of the limit block (9), the central through hole on the fixed plate (8), and the slag discharge port (7) correspond to each other in the upper and lower parts; the through holes on the pressing plate (10), the through holes on the limit block (9), and the threaded holes on the fixed plate (8) correspond to each other in a one-to-one manner; and a plurality of fixing bolts (13) respectively pass through the through holes on the pressing plate (10) and the through holes on the limit block (9) in sequence and are then screwed to the threaded holes on the fixed plate (8).

5. The negative pressure automatic water discharger for mining according to claim 1, characterized in that: An annular groove is provided on the lower end surface of the fixed plate (8), and a first sealing ring (12) is fixedly provided inside the annular groove. The first sealing ring (12) is provided around the central through hole on the fixed plate (8), and the first sealing ring (12) is located inside the U-shaped opening of the limit block (9); the upper and lower end surfaces of the gate plate (11) are in close contact with the first sealing ring (12) and the upper end surface of the pressure plate (10), respectively.

6. The negative pressure automatic water discharger for mining according to claim 1, characterized in that: A water inlet is provided at the upper end of the left side wall of the water discharge tank (1), a water outlet is provided at the lower end of the left side wall of the water discharge tank (1), a water inlet pipe (15) is fixedly provided inside the water inlet, and a water outlet pipe (16) is fixedly provided inside the water outlet; a one-way valve (17) is respectively inserted at the inner end of the water inlet pipe (15) and the outer end of the water outlet pipe (16).

7. The negative pressure automatic water discharger for mining according to claim 6, characterized in that: The one-way valve (17) comprises a plug-in tube (18) and a plug cover (19); one end of the plug-in tube (18) is plugged into the interior of an inner end of the water inlet pipe (15) and an inner end of the drain pipe (16); the other end of the plug-in tube (18) is hingedly connected to the plug cover (19); the plug-in tube (18) is a cylindrical structure with two ends open; a plurality of second sealing rings (20) are provided on the outer side of the opening of one end of the plug-in tube (18); the plug cover (19) is hingedly connected to the outer side of the opening of the other end of the plug-in tube (18); the upper end of the plug cover (19) is hingedly connected to the upper end of the opening of the plug-in tube (18), and the upper end of the plug cover (19) is inclined toward the opening of the end of the plug-in tube (18) where the second sealing ring (20) is provided.

8. The negative pressure automatic water discharger for mining according to claim 6, characterized in that: A reversing valve is arranged at the upper end of the drain tank (1), the reversing valve comprising a valve seat (23) and a valve stem (24); the valve seat (23) is fixedly arranged at the upper end of the drain tank (1); a vertical plug hole is arranged at the lower end surface of the valve seat (23); the upper end of the valve stem (24) is slidably plugged into the plug hole of the valve seat (23) along a vertical direction; a negative pressure interface (25) and a normal pressure interface (26) are arranged on one side of the valve seat (23); the negative pressure interface (25) and the normal pressure interface (26) are both plugged into the plug hole. The valve stem (24) is connected to the inside of the plug hole; a communication pipe is arranged inside the valve stem (24); an inner end opening of the communication pipe is located inside the plug hole, and an outer end opening of the communication pipe is located inside the water discharge tank (1); when the valve stem (24) is at the highest point in the plug hole, an inner end opening of the communication pipe inside the valve stem (24) is connected to the normal pressure interface (26) of the valve seat (23); when the valve stem (24) is at the lowest point in the plug hole, an inner end opening of the communication pipe inside the valve stem (24) is connected to the negative pressure interface (25) of the valve seat (23).

9. The negative pressure automatic water discharger for mining according to claim 8, characterized in that: A negative pressure pipe (28) is provided at the negative pressure interface (25) of the valve seat (23), one end of the negative pressure pipe (28) is fixedly connected to the negative pressure interface (25), and the other end of the negative pressure pipe (28) is connected to the inside of the water inlet pipe (15); an atmospheric valve (27) is fixedly provided on the top plate of the water discharge tank (1), and the atmospheric valve (27) is connected to the outside of the water discharge tank (1); a normal pressure pipe (29) is provided at the normal pressure interface (26) of the valve seat (23), one end of the normal pressure pipe (29) is fixedly connected to the normal pressure interface (26), and the other end of the normal pressure pipe (29) is connected to the atmospheric valve (27).

10. The negative pressure automatic water discharger for mining according to claim 5, characterized in that: A horizontal mounting plate (30) is fixedly arranged on the lower end surface of the valve seat (23), and two vertical guide rods (31) are fixedly arranged on the mounting plate (30); a same buoy (32) is slidably sleeved on the two guide rods (31), the density of the buoy (32) is less than the density of water, and the upper end surface of the buoy (32) is connected to the lower end of the valve stem (24) via a chain (33).

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