Automatic water diversion device suitable for coal mine water pump

Abstract

The utility model discloses an automatic water diversion device suitable for a coal mine water pump, which comprises a box body, a water inlet elbow for introducing water into the box body is arranged at a water inlet, the other end of the water inlet elbow is connected with a filter pipe and extends below the liquid level of a water sump, and a water outlet elbow is arranged at a water outlet. The end, located in the box body, of the water outlet elbow vertically extends downwards to the position above the bottom of the box body, the end, extending out of the box body, of the water outlet elbow is horizontally connected with a water inlet of a coal mine water pump, and the top of the box body is provided with a negative pressure sensor and an ultrasonic sensor and is provided with a liquid adding mechanism and an evacuation mechanism side by side. The automatic water diversion device completely replaces the traditional water diversion modes of a water feeding pump, a vacuum pump and a jet pump, realizes automatic water diversion of the water pump, improves the net positive suction head of the water pump device, reduces or eliminates the damage of the net positive suction phenomenon to the water pump, and improves the working efficiency of the water pump and the automation control degree of the water pump.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid mechanics equipment, in particular to an automatic water priming device applicable to coal mine water pumps. Background Art

[0002] With the development of the automation level of coal mines, unattended control of pump houses has been basically achieved in coal mines. However, the water priming methods of water pumps still adopt traditional feed water pumps, vacuum pumps, and jet pumps. The starting process of the water pump is to first start the feed water pump, vacuum pump, and jet pump. Only when a certain pressure or vacuum degree is reached inside the water pump can the water pump motor be started. Since the feed water pump is submerged underwater and is often blocked, it cannot supply water to the water pump normally; the vacuum pump and jet pump also cannot reach the starting requirement of the vacuum degree inside the water pump chamber due to the poor sealing of the water pump itself. In addition, the feed water pump, vacuum pump, and jet pump have a high failure rate, often resulting in the inability to start the water pump or a too long starting time. Therefore, the traditional water priming method of the water pump no longer meets the development requirements of the automatic control of the water pump, affects the working efficiency of the water pump, and cannot truly achieve the unattended control state of the pump house. The pump house in the coal mine underground is usually several hundred meters underground, with complex water sources, large and continuous water flows, and the water quality is mostly coal slime water. Coal mines have extremely high requirements for the safety and reliability of water pump operation. A too long starting time or the inability to start the water pump will pose potential safety hazards to coal mine production, and in severe cases, a mine flooding accident will occur. In addition, the suction well chamber in the underground pump house is relatively small in space, and valve operation and silt cleaning operations need to be carried out in the chamber. It is not easy to occupy too much space, otherwise it will affect the normal operation of the water pump. After the water pump is installed, the net positive suction head of the water pump is fixed. The cavitation phenomenon of the water pump will seriously affect the working efficiency of the water pump, reduce the service life of the water pump, and affect the safe operation of the water pump. It is necessary to increase the net positive suction head of the water pump device to reduce and suppress the occurrence of the cavitation phenomenon of the water pump. Content of the Utility Model

[0003] To solve the technical problems mentioned in the background art, the utility model provides an automatic water priming device applicable to coal mine water pumps.

[0004] The utility model adopts the following technical scheme: an automatic water diversion device suitable for a coal mine water pump, comprising a box body; a water inlet is arranged on the top of the box body, and a water outlet is arranged on the side; a manual drain valve and an inspection port are arranged at the bottom; a water inlet elbow is arranged at the water inlet for passing water into the box body; the water outlet end of the water inlet elbow is elliptical; the other end of the water inlet elbow extends below the liquid level of the water tank, and a filter tube is connected to the end head of the end; a water outlet elbow is arranged at the water outlet; one end of the water outlet elbow is located in the box body and extends vertically downward to above the bottom of the box body; one end of the water outlet elbow extends out of the box body and is horizontally connected to the water inlet of the coal mine water pump for delivering water to the pump body; a negative pressure sensor and an ultrasonic sensor for detecting the depth of sludge at the bottom of the box body are respectively arranged on the top of the box body; a liquid increasing mechanism and a vacuum mechanism are arranged side by side on the top of the box body; the liquid increasing mechanism Used to add liquid to the box; the vacuum mechanism is used to discharge the gas in the box to the outside, so as to form a negative pressure state in the box and the water inlet bend pipe to draw water from the water tank into the box; the liquid increasing mechanism includes a first water inlet pipe and a second water inlet pipe connected to the box, the first water inlet pipe is connected to a manual water replenishment valve; the second water inlet pipe is connected to an electric water replenishment valve and a manual water stop valve; the first water inlet pipe and the second water inlet pipe are connected by a three-way piece, and the top of the three-way piece is connected to a water replenishment device; the vacuum mechanism includes a first exhaust pipe and a second exhaust pipe connected to the box, the first exhaust pipe is connected to an electric exhaust valve and a manual air stop valve; the second exhaust pipe is connected to a manual exhaust valve; the ends of the first exhaust pipe and the second exhaust pipe are connected together by a four-way piece; the top of the four-way piece is connected to a flow sensor, and the bottom of the four-way piece is externally connected to an exhaust device.

[0005] Furthermore, the middle arc portion of the water outlet elbow is connected to the water outlet by a reducer, and the diameter of the pipe changes from large to small to form a funnel shape.

[0006] Furthermore, the water inlet elbow is directly connected to the water inlet.

[0007] Furthermore, a water inlet cover is provided at the connection between the water inlet and the water inlet elbow; the drain port of the water inlet elbow is enclosed in the water inlet cover, and the drain port of the water inlet elbow is inclined downward so that the discharged water can flow into the water inlet.

[0008] Compared with the prior art, the advantages of the utility model are:

[0009] The automatic water priming device for coal mine pumps designed by the utility model is applicable to the water quality of coal slime water in coal mine shafts. The device is installed outside the sump chamber without affecting the operation of the sump chamber, facilitating installation, maintenance, and ground dredging. It completely replaces the traditional water feeding pumps, vacuum pumps, and jet pump water priming methods, optimizes the control process, and realizes automatic water priming for pumps. The outlet of the device is connected to the inlet of the pump. One end of the outlet elbow is connected to the reducer pipe, and the pipe diameter decreases from large to small, increasing the flow velocity and pressure at the pump inlet, improving the net positive suction head of the pump device, and effectively suppressing the cavitation phenomenon of the pump. The other end of the outlet elbow extends above the bottom of the box body, lowering the outlet plane and increasing the effective volume of the box body. The inlet connected by the inlet elbow is elliptical, increasing the outlet area of the inlet elbow, reducing water resistance, and improving the effective suction lift of the pump. The liquid adding mechanism and evacuation mechanism of the device are respectively provided with manual water stop valves and manual air stop valves to prevent the electric water replenishing valve or electric exhaust valve from malfunctioning in the open position and closing their connection with the box body to ensure the airtightness of the box body. The evacuation mechanism of the device is provided with a flow sensor to detect whether the water level in the box body meets the start-up requirements; the device is provided with a negative pressure sensor to detect the negative pressure state in the box body to ensure the airtightness of the box body. The device is provided with an ultrasonic sensor to detect the silt depth in the box body and perform timely dredging to ensure that the box body meets the effective volume requirements for pump start-up. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 FIG. is a side sectional view of the automatic water priming device for coal mine pumps of the utility model; Figure 1 ;

[0011] Figure 2 FIG. is a side sectional view of the automatic water priming device for coal mine pumps of the utility model; Figure 2 ;

[0012] Figure 3 is Figure 1 the partial enlarged view at position I in;

[0013] Figure 4 is Figure 2 the partial enlarged view at position II in;

[0014] Figure 5 FIG. is the front view of the automatic water priming device for coal mine pumps of the utility model;

[0015] Figure 6 FIG. is a schematic cross-sectional view of an embodiment of the inlet elbow of the utility model;

[0016] Figure 7 FIG. is a schematic cross-sectional view of another embodiment of the inlet elbow of the utility model.

[0017] Wherein:

[0018] 1 - Box body, 2 - Manual drain valve, 3 - Inspection opening, 4 - Outlet elbow, 5 - Filter pipe, 6 - Inlet elbow, 7 - Negative pressure sensor, 8 - Ultrasonic sensor, 9 - First water inlet pipe, 10 - Second water inlet pipe, 11 - Manual water replenishing valve, 12 - Electric water replenishing valve, 13 - Manual water stop valve, 14 - Three-way fitting, 15 - First exhaust pipe, 16 - Second exhaust pipe, 17 - Electric exhaust valve, 18 - Manual air stop valve, 19 - Manual exhaust valve, 20 - Four-way fitting, 21 - Flow sensor, 22 - Water inlet cover body. Detailed implementation manners

[0019] The following is a further description with reference to the accompanying drawings for the convenience of those skilled in the art to understand the technical solution of the present invention. It should be understood that these descriptions are exemplary and not intended to limit the scope of the present invention.

[0020] In the following detailed description, for the sake of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, obviously, one or more embodiments can also be implemented without these specific details. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0021] Embodiment 1:

[0022] As Figure 1-2 shown in FIGS. 5 - 6, a side sectional view of the automatic water priming device for a coal mine water pump designed by the present invention includes a box body 1. An inlet is provided at the top of the box body 1, an outlet is provided on the side, and a manual drain valve 2 and an inspection opening 3 for discharging accumulated water and silt in the box body 1 are provided at the bottom. An inlet elbow 6 for introducing water into the box body 1 is provided at the inlet. The outlet end of the inlet elbow 6 is elliptical.

[0023] As Figure 6The figure shows a cross-sectional schematic diagram of an embodiment of the water inlet elbow of the utility model. When it is implemented, the water inlet elbow 6 is directly connected to the water inlet, and the water outlet end of the water inlet and the water inlet elbow 6 are elliptical, which increases the water inlet area, reduces the water resistance of the water inlet pipe, and improves the effective suction range of the water pump; the other end of the water inlet elbow 6 is connected to the filter pipe 5, which is used to intercept large impurities and floating objects from entering the box body 1 to prevent damage to the water pump. The water outlet is provided with a water outlet elbow 4, and one end of the water outlet elbow 4 located in the box body 1 extends vertically downward to the top of the bottom of the box body 1, and the end of the water outlet elbow 4 extending out of the box body 1 is horizontally connected to the water inlet of the coal mine water pump, which is used to deliver water to the pump body. The middle arc part of the water outlet elbow 4 is connected to the water outlet connection by a reducer, and the pipe diameter changes from large to small to form a funnel shape, which can effectively increase the flow rate and pressure of the water pump inlet and effectively inhibit the occurrence of cavitation in the water pump. The part of the water outlet elbow 4 in the box body 1 extends vertically to the top of the bottom of the box body 1, which lowers the plane of the water outlet of the water outlet elbow 4 and increases the effective volume of the box body 1. A negative pressure sensor 7 is set on the top of the box body 1 to detect the negative pressure state in the box body 1 during the operation of the water pump to ensure that the box body 1 is airtight and leak-free. An ultrasonic sensor 8 is also set on the top of the box body 1 to detect the thickness of the silt at the bottom of the box body 1. When the silt thickness reaches the alarm value, it prompts to clear the silt to ensure that the effective volume of the box body 1 meets the requirements for starting the water pump; the ultrasonic sensor 8 also has an auxiliary flow sensor 21 to detect the change of the water level in the box body to improve the safety and reliability of the operation of the device.

[0024] A liquid increasing mechanism and an evacuation mechanism are arranged side by side on the top of the box 1. The liquid increasing mechanism is used to add water to the box 1 so that the water level in the box 1 meets the water pump starting requirement. The evacuation mechanism is used to discharge the gas in the box 1, so as to form a negative pressure state in the box 1 and the water inlet elbow 6 pumps water from the water tank into the box 1.

[0025] The utility model is designed to be suitable for the automatic water diversion device of the coal mine water pump. It automatically diverts water before the water pump is started, saves the water feeding pump, vacuum pump and jet pump, optimizes the control process, and achieves the purpose of rapid starting and safe operation of the water pump.

[0026] Please refer to Figure 3 In a specific implementation, the vacuum mechanism includes a first exhaust pipe 15 and a second exhaust pipe 16 connected to the box body 1, the first exhaust pipe 15 is connected to an electric exhaust valve 17 and a manual air stop valve 18, the second exhaust pipe 16 is connected to a manual exhaust valve 19, the ends of the first exhaust pipe 15 and the second exhaust pipe 16 are connected together through a four-way piece 20, the top end of the four-way piece 20 is connected to a flow sensor 21, and the bottom end of the four-way piece 20 is externally connected to an exhaust device.

[0027] During normal exhaust, the control system opens the electric exhaust valve 17, sets the manual air stop valve 18 to the open state, and sets the manual exhaust valve 19 to the closed state. The gas is discharged from the first exhaust pipe 15 through the four-way piece 20. When there is liquid discharged from the four-way piece 20, the flow sensor 21 sends a signal indicating that the water level in the box body 1 is full and meets the water pump startup requirements, and the control system closes the electric exhaust valve 17.

[0028] When the electric exhaust valve 17 fails, open the manual exhaust valve 19 and adopt the manual exhaust mode. To prevent the electric exhaust valve 17 from failing in the open state, close the manual air stop valve 18, and then close the connection between the box body 1 and the electric exhaust valve 17 to ensure the airtightness of the box body 1. The gas is discharged from the second exhaust pipe 16. When there is liquid flowing out of the four-way piece 20, the flow sensor 21 sends a signal indicating that the water level in the box body 1 is full, and close the manual exhaust valve 19.

[0029] Please refer to Figure 4 , during specific implementation, the liquid adding mechanism includes a first water inlet pipe 9 and a second water inlet pipe 10 connected to the box body 1. A manual water filling valve 11 is connected to the first water inlet pipe 9, and an electric water filling valve 12 and a manual water stop valve 13 are connected to the second water inlet pipe 10. The first water inlet pipe 9 and the second water inlet pipe 10 are connected through a three-way piece 14, and the upper end of the three-way piece 14 is connected to the water supply equipment.

[0030] During normal water filling, the control system opens the electric water filling valve 12, sets the manual water stop valve 13 to the open state, and sets the manual water filling valve 11 to the closed state. The liquid fills the box body 1 through the three-way piece 14 and the second water inlet pipe 10. When the flow sensor 21 sends a signal, the control system closes the electric water filling valve 12. When the electric water filling valve 12 fails, open the manual water filling valve 11. To prevent the electric water filling valve 12 from failing in the open position, close the manual water stop valve 13, and then close the connection between the electric water filling valve 12 and the box body 1 to ensure the airtightness of the box body 1. The liquid fills the box body 1 through the three-way piece 14 and the first water inlet pipe 9. When the flow sensor 21 sends a signal, close the manual water filling valve 11.

[0031] Under normal conditions, both the liquid adding mechanism and the evacuation mechanism are in a closed state. Before the water pump is started, the control system detects the water level in the box body 1 through the flow sensor 21, and at the same time monitors the change of the water level in the box body 1 through the ultrasonic sensor 8. If the flow sensor 21 does not send out a signal, it indicates that the water level in the box body 1 is lower than the starting requirement of the water pump. The control system sequentially opens the liquid adding mechanism and the evacuation mechanism according to the program. The liquid adding mechanism replenishes water into the cavity of the box body 1, and the evacuation mechanism discharges the air in the box body 1 to the outside. When the flow sensor 21 sends out a signal, the water level in the box body 1 reaches the starting requirement of the water pump. The control system sequentially closes the liquid adding mechanism and the evacuation mechanism according to the program to complete the water diversion program control of the water pump, and the control system sends out a signal allowing the water pump to start. At this time, a closed space is formed between the water surface in the box body 1 and the water storage surface in the water inlet elbow 6. When the water pump is started, the water surface in the water tank 1 drops, forming a negative pressure, and the water surface in the water inlet elbow 6 rises into the box body 1, forming continuous pumping. When the water pump is running, the control system detects the change of the negative pressure in the box body through the negative pressure sensor 7. When the absolute value of the detected negative pressure is less than the absolute value of the negative pressure set by the control system, it indicates that there is a problem with the airtightness of the device, and the control system stops the operation of the water pump to prevent the water pump from being damaged by "dry burning". After the water pump stops running, the control system detects whether the box body 1 needs to be replenished with water through the flow sensor 21. If necessary, the control system turns on the water replenishment control. At the same time, the control system detects the thickness of the sludge at the bottom of the box body 1 through the ultrasonic sensor 8. When the sludge thickness is higher than the system set value, it prompts to carry out sludge cleaning operation on the box body 1 to ensure that the effective volume in the box body 1 meets the starting requirement of the water pump. The ultrasonic sensor 8 can also assist the flow sensor 21 to detect the water level in the box body 1 to ensure the safe and reliable operation of the device.

[0032] Embodiment 2:

[0033] The difference between this embodiment and Embodiment 1 lies in the different structure of the water inlet elbow. As Figure 7 shown, it is a cross-sectional schematic diagram of another embodiment of the water inlet elbow of the present utility model. In this embodiment, a water inlet cover body 22 is provided at the connection between the water inlet and the water inlet elbow 6. The drain port of the water inlet elbow 6 is enclosed in the water inlet cover body 22, and the drain port of the water inlet elbow 6 is inclined obliquely downward, with an inclination angle of 30 degrees to 45 degrees, and the water outlet end of the water inlet elbow 6 is elliptical. The water outlet cross-section of the water inlet elbow increases by 1.4 times to 2 times, reducing the water flow resistance and increasing the suction lift of the water pump.

[0034] The above embodiments are only descriptions of the preferred embodiments of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope determined by the claims of the present utility model.

Claims

1. An automatic water diversion device suitable for coal mine water pumps, characterized in that: The invention comprises a box body (1); an elliptical water inlet is arranged on the top of the box body (1), and a water outlet is arranged on the side; a manual drain valve (2) and an inspection port (3) are arranged on the bottom; a water inlet elbow (6) is arranged at the water inlet for passing water into the box body (1); the water outlet end of the water inlet elbow (6) is elliptical; the other end of the water inlet elbow (6) extends below the liquid level of the water tank, and is connected to a filter tube (5) at the end; a water outlet elbow (4) is arranged at the water outlet; one end of the water outlet elbow (4) located in the box body (1) extends vertically downwards The box (1) is provided with a plurality of outlet elbows (4) extending above the bottom of the box (1); one end of the outlet elbow (4) extending outside the box (1) is horizontally connected to the water inlet of the coal mine water pump for delivering water into the pump body; a negative pressure sensor (7) and an ultrasonic sensor (8) for detecting the depth of silt at the bottom of the box (1) are respectively arranged on the top of the box (1); a liquid increasing mechanism and a vacuum mechanism are arranged side by side on the top of the box (1); the liquid increasing mechanism is used to add liquid into the box (1); and the vacuum mechanism is used to discharge gas from the box (1) to the outside, so as to form a vacuum in the box (1). The negative pressure state and the water inlet elbow (6) pump water from the water tank into the box body (1); the liquid increasing mechanism comprises a first water inlet pipe (9) and a second water inlet pipe (10) connected to the box body (1); the first water inlet pipe (9) is connected to a manual water replenishment valve (11); the second water inlet pipe (10) is connected to an electric water replenishment valve (12) and a manual water stop valve (13); the first water inlet pipe (9) and the second water inlet pipe (10) are connected via a tee piece (14); the top end of the tee piece (14) is connected to a water replenishment device; The evacuation mechanism comprises a first exhaust pipe (15) and a second exhaust pipe (16) connected to the box body (1); the first exhaust pipe (15) is connected to an electric exhaust valve (17) and a manual air stop valve (18); the second exhaust pipe (16) is connected to a manual exhaust valve (19); the ends of the first exhaust pipe (15) and the second exhaust pipe (16) are connected together via a four-way piece (20); the top end of the four-way piece (20) is connected to a flow sensor (21), and the bottom end of the four-way piece (20) is externally connected to an exhaust device.

2. The automatic water diversion device for coal mine water pump according to claim 1 is characterized in that: The middle arc-shaped portion of the water outlet elbow (4) is connected to the water outlet by a reducer, and the diameter of the pipe changes from large to small to form a funnel shape.

3. The automatic water diversion device for coal mine water pumps according to claim 2 is characterized in that: The water inlet elbow (6) is directly connected to the water inlet.

4. The automatic water diversion device for coal mine water pumps according to claim 2 is characterized in that: A water inlet cover (22) is provided at the connection between the water inlet and the water inlet elbow (6); the drainage port of the water inlet elbow (6) is enclosed in the water inlet cover (22), and the drainage port of the water inlet elbow (6) is inclined downward so that the discharged water can flow into the water inlet.

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