Mining multi-stage pump drainage system with irrigation-free device
By designing a mining multi-stage pump drainage system with a filling-free device, the mining multi-stage pump can be quickly started and run cleanly, the problems of insufficient vacuum and low vacuuming efficiency are solved, and the reliability and flexibility of the multi-stage pump are ensured.
Patent Information
- Application Number
- CN202422765400.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-13
AI Technical Summary
Existing multi-stage mining pumps are prone to insufficient vacuum or cavitation during startup, and the vacuuming method is inefficient, increasing manufacturing difficulty.
A mining multi-stage pump drainage system with a filling-free device is designed, including a drainage system, a water diversion device, a water replenishment and sewage flushing system, and an overflow system. Automated operation is achieved through a PLC control system to avoid vacuum equipment. A water level detection and automatic water replenishment system are set up to ensure rapid startup and internal cleaning of the multi-stage pump.
It greatly shortens the startup preparation time of the multi-stage pump, avoids the risk of cavitation, ensures the fast and reliable startup of the multi-stage pump, and keeps the device clean through the flushing system to avoid blockage.
Smart Images
Figure CN223482906U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of mining multistage pumps, specifically relating to a mining multistage pump drainage system with a priming-free device. Background Technology
[0002] Mining multistage pumps, characterized by high head, large flow rate, and high efficiency, have become key equipment in mine drainage systems, primarily used in centralized drainage systems of mine central pump houses. Currently, to prevent severe cavitation during startup and avoid damage to the impeller, a vacuum method is typically used to start the pump. During this vacuuming process, the pump's outlet valve is closed. Under atmospheric pressure, the fluid medium from the mine water tank enters the pump through the inlet pipe. Once the pump is filled with priming water, it is started, the outlet valve is opened, and the pump enters the normal drainage phase.
[0003] Currently, the vacuuming methods commonly used for mining multistage pumps mainly include vacuum pumps and jet pumps. When using a vacuum pump to evacuate a mining multistage pump, insufficient or limited vacuum levels are prone to occur, especially when the water level in the mine water tank is low. This results in a longer evacuation time and a high risk of insufficient vacuum within the pump, preventing the priming water from completely filling the pump's internal cavity, leading to pump failure to start or severe cavitation. Furthermore, when using jet pumps or other jet vacuuming devices to evacuate mining multistage pumps, the efficiency of these devices is generally low, making them suitable for slow evacuation processes. However, for mining multistage pumps, in emergency situations, high evacuation efficiency and timely, rapid pump start-up are required. Therefore, using jet vacuuming devices in the startup process of mining multistage pumps has certain drawbacks and defects. Both of the aforementioned commonly used vacuuming methods for mining multistage pumps place high demands on the pump's sealing performance, increasing the difficulty of manufacturing and assembling the pumps.
[0004] Therefore, in order to solve the drawbacks and technical difficulties of starting mining multistage pumps by vacuuming, shorten the start-up preparation time of mining multistage pumps, and improve the flexibility of mining multistage pumps, there is an urgent need for a fast start-up device suitable for mining multistage pumps. Summary of the Invention
[0005] To address the aforementioned technical deficiencies, this utility model designs a priming-free device for a multi-stage pump used in mining and proposes a drainage system for a multi-stage pump used in mining with a priming-free device, thereby resolving the technical deficiencies described in the background art.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A mine multi-stage pump drainage system with a water-free device includes a drainage system, a water-free device, a water intake device, a water replenishment and flushing system, and an overflow system. One end of the water intake device is fixed to the side wall of the water tank, and the other end of the water intake device is nested in the inner cavity of the water-free device. One end of the water replenishment and flushing system is fixed to the side wall of the water tank, and the other end of the water replenishment and flushing system is connected to the internal water replenishment pipe and flushing pipe of the water-free device through a three-way valve. One end of the overflow system is fixed to the water-free device by welding, and the other end of the overflow system is fixed to the side wall of the water tank. The water-free device is installed on one side of the water tank. The drainage system is installed on the other side of the water-free device through a pump inlet pipe. The start / stop control signal line of the drainage system is connected to the PLC control system.
[0007] Furthermore, the water-free device includes an inspection port, an ultrasonic level sensor, a drain valve, a vacuum gauge, an internal water supply pipe, a flushing ramp, a drain pipe, a flushing outlet pipe, and an internal water inlet pipe. The inspection port is located on the side where the drainage device connects to the water-free device. A flange connection cover is installed at the inspection port, and the flange connection cover is sealed with an O-ring. The ultrasonic level sensor is installed on the internal top plate of the water-free device. The signal line of the ultrasonic level sensor is connected to the PLC control system, and the signal line of the ultrasonic level sensor is sealed to the perforation of the water-free device. The air valve and vacuum pressure gauge are both installed on the top of the water-free device and connected to the inside of the water-free device. The signal line of the air valve is connected to the PLC control system. The internal water supply pipe is fixed to the top of the water-free device by welding. The flushing slope is at a certain angle and is fixed to the inside of the water-free device by welding. The sewage pipe is fixed to the side wall of the water-free device by welding and is close to the lowest point of the flushing slope. The sewage discharge pipe is fixed to the inner side wall of the water-free device and is close to the flushing slope. One end of the internal water inlet pipe extends to the outside of the water-free device through a flange. One end of the internal water inlet pipe is vertical and has a 45° cut.
[0008] Furthermore, the sewage discharge pipe is provided with several sewage discharge holes, the outlet direction of which is parallel to the sewage discharge slope to flush the sewage discharge slope.
[0009] Furthermore, the drainage system includes a multi-stage pump, a pump inlet pipe, a pump outlet pipe, and a pump filter cover. The multi-stage pump is mounted on one side of the irrigation-free device via a base. The pump inlet pipe is fixed to the irrigation-free device by welding. A pump filter cover is installed at one end of the pump inlet pipe, and the other end of the pump inlet pipe is connected to the inlet of the multi-stage pump via a flange. The pump outlet pipe is connected to the outlet of the multi-stage pump via a flange. The start / stop control line of the multi-stage pump is connected to the PLC control system.
[0010] Furthermore, the water intake device includes an internal water intake pipe, an external water intake pipe, and a water absorption filter cover. The internal water intake pipe extends to one end of the irrigation-free device and is equipped with a flange. The external water intake pipe is connected to the internal water intake pipe and is equipped with a flange at one end. The other end of the external water intake pipe is equipped with a water absorption filter cover.
[0011] Furthermore, the water replenishment and flushing system includes a submersible pump, a submersible pump inlet pipe, a submersible pump outlet pipe, a three-way valve, an external water replenishment pipe, and a flushing inlet pipe. One end of the submersible pump inlet pipe is fitted with a suction filter cover, and the other end is connected to the submersible pump inlet. A check valve is installed on the submersible pump outlet pipe. One end of the submersible pump outlet pipe is divided into an external water replenishment pipe and a flushing inlet pipe via a three-way valve. The external water replenishment pipe is connected to the internal water replenishment pipe via a flange. The flushing inlet pipe is connected to the flushing drain pipe. Electric gate valves A and B are respectively installed on the external water replenishment pipe and the flushing inlet pipe. The signal control lines of electric gate valves A and B are connected to a PLC control system.
[0012] Furthermore, the overflow system includes a solenoid valve and an overflow pipe. The solenoid valve is installed on the side wall of the irrigation-free device through a pipe. The overflow pipe is connected to the solenoid valve through a flange. The signal control line of the solenoid valve is connected to the PLC control system. The horizontal height of the solenoid valve is slightly lower than the outlet height of the internal water inlet pipe of the water inlet device, and the horizontal height of the solenoid valve is higher than the outlet height of the multi-stage pump.
[0013] Compared with existing technologies, the mining multistage pump drainage system with a priming-free device described in this utility model replaces the vacuum equipment of the mining multistage pump with the priming-free device, greatly shortening the start-up preparation time of the multistage pump. Simultaneously, the drainage system is equipped with a water level detection system and an automatic water replenishment system for the priming-free device, enabling real-time water replenishment to ensure the water level of the priming-free device and thus avoiding the risk of cavitation in the multistage pump. Furthermore, the bottom of the priming-free device is equipped with a flushing slope and flushing system, which can periodically flush the interior of the priming-free device, ensuring its cleanliness. Additionally, a pump filter cover is installed at the pump inlet pipe of the multistage pump to prevent impurities from the priming-free device from entering the multistage pump and causing blockages. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structural system of this utility model;
[0015] Figure 2 This is a partial enlarged view of the irrigation-free device of this utility model.
[0016] The diagram is labeled as follows: 1: Multistage pump; 11: Pump inlet pipe; 12: Pump filter cover; 13: Pump outlet pipe; 2: No-priming device; 21: Inspection port; 22: Ultrasonic level sensor; 23: Drain valve; 24: Vacuum pressure gauge; 25: Internal water supply pipe; 26: Sewage flushing ramp; 27: Sewage discharge pipe; 28: Sewage flushing drain pipe; 281: Sewage flushing hole; 3: Water intake device; 31: Internal water intake pipe; 32: External water intake pipe; 33: Suction filter cover; 4: Submersible pump; 41: Submersible pump inlet pipe; 42: Submersible pump outlet pipe; 43: Check valve; 44: Three-way valve; 45: External water supply pipe; 451: Electric gate valve A; 46: Sewage flushing inlet pipe; 461: Electric gate valve B; 5: Overflow system; 51: Solenoid valve; 52: Overflow pipe; 6: Water tank. Detailed Implementation
[0017] To make the technical problem to be solved, the technical solution and the implementation effect of this utility model clearer, the following is in conjunction with the appendix. Figure 1 and 2 An embodiment of the present invention will be further described below:
[0018] See appendix Figure 1 and 2 The present invention discloses a multi-stage pump drainage system for mines with a water-free device, comprising a drainage system, a water-free device 2, a water intake device 3, a water replenishment and flushing system, and an overflow system 5. One end of the water intake device 3 is fixed to the side wall of the water tank 6, and the other end of the water intake device 3 is nested in the inner cavity of the water-free device 2. One end of the water replenishment and flushing system is fixed to the side wall of the water tank 6, and the other end of the water replenishment and flushing system is connected to the internal water replenishment pipe 25 and the flushing pipe 28 of the water-free device 2 respectively through a three-way valve 44. One end of the overflow system 5 is fixed to the water-free device 2 by welding, and the other end of the overflow system 5 is fixed to the side wall of the water tank 6. The water-free device 2 is installed on one side of the water tank 6. The drainage system is installed on the other side of the water-free device 2 through a pump inlet pipe 11. The start / stop control signal line of the drainage system is connected to the PLC control system.
[0019] In a preferred embodiment, the water-free device 2 includes an inspection port 21, an ultrasonic level sensor 22, a drain valve 23, a vacuum pressure gauge 24, an internal water supply pipe 25, a flushing ramp 26, a sewage pipe 27, a flushing drain pipe 28, and an internal water inlet pipe 31. The inspection port 21 is located on the side where the drainage device connects to the water-free device 2. A flange connection cover is installed at the inspection port 21, and the flange connection cover is sealed with an O-ring. The inspection port 21 allows for internal inspection and maintenance of the water-free device 2. The ultrasonic level sensor 22 is installed on the internal top plate of the water-free device 2. The signal line of the ultrasonic level sensor 22 is connected to the PLC control system. The ultrasonic level sensor 22 detects changes in the water level inside the water-free device 2 in real time and transmits the water level information to the PLC control system via the signal line. The signal line of the ultrasonic level sensor 22 is sealed to the perforation of the irrigation-free device 2. The drain valve 23 and the vacuum pressure gauge 24 are both installed on the top of the irrigation-free device 2 and connected to the inside of the irrigation-free device 2. The signal line of the drain valve 23 is connected to the PLC control system. The vacuum pressure gauge 24 can display the vacuum level inside the irrigation-free device 2 in real time. The internal water supply pipe 25 is fixed to the top of the irrigation-free device 2 by welding. The flushing slope 26 is fixed to the inside of the irrigation-free device 2 at a certain angle by welding. The sewage pipe 27 is fixed to the side wall of the irrigation-free device 2 by welding and is close to the lowest point of the flushing slope 26. The sewage discharge pipe 28 is fixed to the inner side wall of the irrigation-free device 2 and is close to the flushing slope 26. One end of the internal water inlet pipe 31 extends to the outside of the irrigation-free device 2 through a flange. One end of the internal water inlet pipe 31 is vertical and has a 45° cut.
[0020] In a preferred embodiment, the flushing pipe 28 is provided with a plurality of flushing holes 281. The outlet direction of the flushing holes 281 is parallel to the flushing slope 26. When the flushing system is working, the water in the water tank 6 is transported to the flushing pipe 28 through the submersible pump 4 and flushes the flushing slope 26 along the flushing holes 281. The flushed sewage flows out along the drain pipe 27.
[0021] In a preferred embodiment, the drainage system includes a multi-stage pump 1, a pump inlet pipe 11, a pump outlet pipe 13, and a pump filter cover 12. The multi-stage pump 1 is mounted on one side of the irrigation-free device 2 via a base. The pump inlet pipe 11 is fixed to the irrigation-free device 2 by welding. The pump filter cover 12 is installed at one end of the pump inlet pipe 11, and the other end of the pump inlet pipe 11 is connected to the inlet of the multi-stage pump 1 via a flange. The pump outlet pipe 13 is connected to the outlet of the multi-stage pump 1 via a flange. The start / stop control line of the multi-stage pump 1 is connected to the PLC control system.
[0022] In a preferred embodiment, the water intake device 3 includes an internal water intake pipe 31, an external water intake pipe 32, and a water absorption filter cover 33. The internal water intake pipe 31 extends to one end of the irrigation-free device 2 and is provided with a flange. The external water intake pipe 32 is connected to the internal water intake pipe 31 and is provided with a flange. The other end of the external water intake pipe 32 is equipped with a water absorption filter cover 33.
[0023] In a preferred embodiment, the water replenishment and flushing system includes a submersible pump 4, a submersible pump inlet pipe 41, a submersible pump outlet pipe 42, a three-way valve 44, an external water replenishment pipe 45, and a flushing inlet pipe 46. A suction filter 33 is installed at one end of the submersible pump inlet pipe 41. The suction filter 33 installed at the external water inlet pipe 32 is the same as the suction filter 33 installed at the submersible pump inlet pipe 41. The other end of the submersible pump inlet pipe 41 is connected to the inlet of the submersible pump 4. A check valve 43 is installed on the submersible pump outlet pipe 42. One end of 42 is divided into an external water supply pipe 45 and a sewage inlet pipe 46 via a three-way valve 44. The external water supply pipe 45 is connected to the internal water supply pipe 25 via a flange. The sewage inlet pipe 46 is connected to the sewage discharge pipe 28. The sewage inlet pipe 46 is connected to the irrigation-free device 2 by through-hole welding. Electric gate valve A 451 and electric gate valve B 461 are respectively installed on the external water supply pipe 45 and the sewage inlet pipe 46. The signal control lines of electric gate valve A 451 and electric gate valve B 461 are connected to the PLC control system.
[0024] In a preferred embodiment, the overflow system 5 includes a solenoid valve 51 and an overflow pipe 52. The solenoid valve 51 is installed on the side wall of the irrigation-free device 2 through a pipe. The overflow pipe 52 is connected to the solenoid valve 51 through a flange. The other end of the overflow pipe 52 is led into the water tank 6. The signal control line of the solenoid valve 51 is connected to the PLC control system. The horizontal height of the solenoid valve 51 is slightly lower than the outlet height of the internal water inlet pipe 31 of the water inlet device 3, and the horizontal height of the solenoid valve 51 is higher than the outlet height of the multi-stage pump 1.
[0025] As a preferred embodiment, through the above technical solution, the mining multi-stage pump drainage system with a no-fill device described in this utility model, when the mining multi-stage pump drainage system is first installed and put into operation, under the action of the PLC control system, closes the electric gate valve B 461, opens the electric gate valve A 451, check valve 43, solenoid valve 51 and drain valve 23, and simultaneously starts the submersible pump 4. At this time, the water supply system delivers water from the water tank 6 to the no-fill device 2 through the submersible pump 4. The water suction filter 33 can filter the medium entering the submersible pump 4. When the water level in the no-fill device 2 reaches the horizontal height of the solenoid valve 51 of the overflow system 5, the excess water in the no-fill device 2 flows back to the water tank 6 along the overflow system 5. Then, under the action of the PLC control system, closes the electric gate valve A 451, check valve 43, solenoid valve 51 and drain valve 23, and simultaneously shuts down the submersible pump 4. At this time, due to the high water level in the no-fill device 2... At the outlet of multistage pump 1, the inner cavity of multistage pump 1 is already filled with water. Multistage pump 1 is started by the PLC control system. As the water level of the priming-free device 2 decreases, a vacuum state is formed inside. Under the action of external atmospheric pressure, the water in water tank 6 passes through the water suction filter 33 and enters the priming-free device 2 along the water inlet device 3, thus ensuring the normal start-up of multistage pump 1. When the mine multistage pump drainage system stops operating and is about to be restarted, the PLC control system detects that the water level is lower than the set value (i.e., the outlet height of multistage pump 1) through the ultrasonic level sensor 22. Under the action of the PLC control system, the electric gate valve B 461 is closed, and the electric gate valve A 451, check valve 43, solenoid valve 51 and drain valve 23 are opened. At the same time, the submersible pump 4 is started to replenish water to the priming-free device 2 through the water replenishment system until the water level of the priming-free device 2 reaches the horizontal height of the solenoid valve 51 of the overflow system 5. The above operation steps are repeated.
[0026] Furthermore, by adopting the above technical solution, the mine multi-stage pump drainage system with a non-irrigation device described in this utility model also includes a flushing system for the non-irrigation device 2. After the drainage system has been running for a period of time, under the action of the PLC control system, the electric gate valve A 451 is closed, and the electric gate valve B 461, check valve 43, and drain valve 23 are opened. The valve of the drain pipe 27 is opened. After the water in the non-irrigation device 2 is drained, the submersible pump 4 is started to transport the water in the water tank 6 to the flushing pipe 28 through the flushing system. The flushing slope 26 of the non-irrigation device 2 is flushed through the flushing hole 281 of the flushing pipe 28. The flushed sewage flows back to the water tank 6 or other designated locations along the drain pipe 27.
[0027] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A mine multi-stage pump drainage system with an anti-irrigation device, comprising a drainage system, an anti-irrigation device (2), a water intake device (3), a water replenishment and flushing system, and an overflow system (5), characterized in that: One end of the water intake device (3) is fixed to the side wall of the water tank (6), and the other end of the water intake device (3) is nested in the inner cavity of the irrigation-free device (2). One end of the water replenishment and flushing system is fixed to the side wall of the water tank (6), and the other end of the water replenishment and flushing system is connected to the internal water replenishment pipe (25) and the flushing pipe (28) of the irrigation-free device (2) respectively through a three-way valve (44). One end of the overflow system (5) is fixed to the irrigation-free device (2) by welding, and the other end of the overflow system (5) is fixed to the side wall of the water tank (6). The irrigation-free device (2) is installed on one side of the water tank (6), and the drainage system is installed on the other side of the irrigation-free device (2) through a pump inlet pipe (11).
2. A mine multi-stage pump drainage system with an irrigation-free device according to claim 1, characterized in that: The waterless device (2) includes an inspection port (21), an ultrasonic level sensor (22), a drain valve (23), a vacuum pressure gauge (24), an internal water supply pipe (25), a flushing ramp (26), a drain pipe (27), a flushing drain pipe (28), and an internal water inlet pipe (31). The inspection port (21) is located on the side where the drainage device connects to the waterless device (2). A flange connection cover is installed at the inspection port (21), and the flange connection cover is sealed by an O-ring. The ultrasonic level sensor (22) is installed on the internal top plate of the waterless device (2). The signal line of the ultrasonic level sensor (22) is sealed to the perforation of the waterless device (2). The drain valve (23) Both the vacuum pressure gauge (24) and the vacuum pressure gauge (25) are installed on the top of the water-free device (2) and connected to the inside of the water-free device (2). The internal water supply pipe (25) is fixed to the top of the water-free device (2) by welding. The flushing slope (26) is at a certain angle and is fixed to the inside of the water-free device (2) by welding. The sewage pipe (27) is fixed to the side wall of the water-free device (2) by welding and is close to the lowest point of the flushing slope (26). The sewage discharge pipe (28) is fixed to the inner side wall of the water-free device (2) and is close to the flushing slope (26). One end of the internal water inlet pipe (31) extends to the outside of the water-free device (2) through a flange. One end of the internal water inlet pipe (31) is vertical and has a 45° cut.
3. A mine multi-stage pump drainage system with an irrigation-free device according to claim 1 or 2, characterized in that: Several flushing holes (281) are provided on the flushing pipe (28), and the outlet direction of the flushing holes (281) is parallel to the flushing slope (26).
4. A mine multi-stage pump drainage system with an irrigation-free device according to claim 1, characterized in that: The drainage system includes a multistage pump (1), a pump inlet pipe (11), a pump outlet pipe (13), and a pump filter cover (12). The multistage pump (1) is installed on one side of the irrigation-free device (2) via a base. The pump inlet pipe (11) is fixed to the irrigation-free device (2) by welding. The pump filter cover (12) is installed at one end of the pump inlet pipe (11). The other end of the pump inlet pipe (11) is connected to the inlet of the multistage pump (1) via a flange. The pump outlet pipe (13) is connected to the outlet of the multistage pump (1) via a flange.
5. A mine multi-stage pump drainage system with an irrigation-free device according to claim 1, characterized in that: The water intake device (3) includes an internal water intake pipe (31), an external water intake pipe (32), and a water absorption filter cover (33). The internal water intake pipe (31) extends to one end of the irrigation-free device (2) and is provided with a flange. The external water intake pipe (32) is connected to the internal water intake pipe (31) and is provided with a flange. The other end of the external water intake pipe (32) is equipped with a water absorption filter cover (33).
6. A mine multi-stage pump drainage system with an irrigation-free device according to claim 1, characterized in that: The water replenishment and flushing system includes a submersible pump (4), a submersible pump inlet pipe (41), a submersible pump outlet pipe (42), a three-way valve (44), an external water replenishment pipe (45), and a flushing inlet pipe (46). A water suction filter cover (33) is installed at one end of the submersible pump inlet pipe (41), and the other end of the submersible pump inlet pipe (41) is connected to the inlet of the submersible pump (4). A check valve (43) is installed on the submersible pump outlet pipe (42). One end of the submersible pump outlet pipe (42) is divided into an external water replenishment pipe (45) and a flushing inlet pipe (46) through a three-way valve (44). The external water replenishment pipe (45) is connected to the internal water replenishment pipe (25) through a flange. The flushing inlet pipe (46) is connected to the flushing drain pipe (28). Electric gate valve A (451) and electric gate valve B (461) are installed on the external water replenishment pipe (45) and the flushing inlet pipe (46), respectively.
7. A mine multi-stage pump drainage system with an irrigation-free device according to claim 1, characterized in that: The overflow system (5) includes a solenoid valve (51) and an overflow pipe (52). The solenoid valve (51) is installed on the side wall of the irrigation-free device (2) through a pipe. The overflow pipe (52) is connected to the solenoid valve (51) through a flange. The horizontal height of the solenoid valve (51) is slightly lower than the outlet height of the internal water inlet pipe (31) of the water inlet device (3). The horizontal height of the solenoid valve (51) is higher than the outlet height of the multistage pump (1).