An automatic pump - filling mine centrifugal drainage pump

Abstract

The present invention relates to the technical field of centrifugal pumps, and particularly to a mine centrifugal drainage pump with automatic priming. It includes a multi-stage centrifugal pump and a water inlet pipe. The water inlet pipe is connected to the water inlet of the multi-stage centrifugal pump and kept in communication. It also includes a vertical pipe, a sealing ring, a connecting shell, a gasket, etc. The vertical pipe is directly below the lower end of the water inlet pipe. The sealing ring is connected to the lower end of the vertical pipe. The connecting shell is connected to the lower part of the vertical pipe. The gasket is connected to the inner top of the connecting shell. Through the coordinated cooperation of the electric push rod, the connecting ring, the sliding frame, the baffle plate, and the water storage assembly, the present invention can realize the automatic priming function before the centrifugal pump starts. When the electric push rod drives the baffle plate to move, it can accurately control the alignment or misalignment of the through hole between the vertical pipe and the water extraction pipe, so as to ensure the construction or cutting off of the water flow channel. At the same time, before the water flow channel is completely constructed, the water storage assembly uses the pre-stored water energy to prevent the vacuum state inside the water inlet pipe, ensuring that the multi-stage centrifugal pump can start and operate normally.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal pumps, in particular to an automatic priming centrifugal drainage pump for mines. Background Art

[0002] In mine drainage systems, centrifugal pumps are widely used equipment to pump out accumulated water in mines to ensure the safety and efficiency of mining operations. However, in actual applications, the normal operation of centrifugal pumps needs to meet certain conditions, among which "priming the pump" is an indispensable step. Priming the pump means filling the pump body and the suction pipe with water before starting the centrifugal pump to avoid air binding caused by the presence of air, thereby ensuring that the pump can effectively pump liquid and work normally.

[0003] At present, centrifugal pumps in mines usually achieve pump filling operation by installing a bottom valve at the lower end of the suction pipe. The bottom valve is a one-way valve. Its design principle is to use a liftable valve plate to control the one-way flow of water. When the pump is running, the bottom valve automatically opens to allow water to flow into the pump body, and when the pump stops running, the bottom valve closes to prevent water from flowing back to the water source. Although this design can simplify the pump filling operation to a certain extent, there are still many problems: First, the valve plate of the bottom valve will always be located in the center of the water flow channel, which will not only increase the inlet resistance, but also may cause the energy consumption of the water pump to increase. For mine drainage systems that need to run for a long time, this problem will directly affect the economy and efficiency of the system; secondly, the water source in the mine environment usually contains a large amount of sand, mud and other solid impurities. These impurities are easily sandwiched between the valve plate and the base when the bottom valve is closed, destroying the sealing performance of the bottom valve and causing the bottom valve to fail. Once the bottom valve fails, the water in the pump will be lost through the bottom valve. At this time, the bottom valve must be replaced and the pump filling operation must be performed again, which is not only troublesome to operate, but also affects the overall operation efficiency of the mine drainage system. Summary of the invention

[0004] In view of this, the present invention provides a mine centrifugal drainage pump with automatic priming, which overcomes the shortcomings of the existing centrifugal pump, that is, when used with a bottom valve, the valve plate of the bottom valve will always be located in the center of the water flow channel, increasing the inlet resistance, and the bottom valve is prone to failure, resulting in the need to regularly replace the bottom valve and re-perform the priming operation, which is cumbersome to operate.

[0005] The technical solution is as follows: A mine centrifugal drainage pump with automatic pump priming, which includes a multi-stage centrifugal pump and a water inlet pipe. The water inlet pipe is connected to the water inlet of the multi-stage centrifugal pump and kept in communication. It also includes a vertical pipe, a sealing ring, a connecting shell, a gasket, an electric push rod, a connecting ring, a sliding frame, a water extraction pipe, a rubber membrane, a baffle and a water storage assembly. The vertical pipe is directly below the lower end of the water inlet pipe. The sealing ring is connected to the lower end of the vertical pipe. The connecting shell is connected to the lower part of the vertical pipe. The gasket is connected to the inner top of the connecting shell. The electric push rod is installed on the inner wall of the connecting shell. The connecting ring is connected to the telescopic rod of the electric push rod. The sliding frame is slidably connected to the inner wall of the connecting ring. The water extraction pipe is connected to the sliding frame and is directly below the lower end of the vertical pipe. The rubber membrane connects the outer wall of the water extraction pipe and the bottom of the connecting shell. The baffle is connected to the upper end of the water extraction pipe. The top of the baffle contacts the bottom of the sealing ring and the bottom of the gasket, and through holes are opened on the baffle so that the vertical pipe and the water extraction pipe can be communicated through the through holes. The water storage assembly is used for temporarily storing water.

[0006] Optionally, the water storage assembly includes a water storage cylinder, a connecting frame, a filter screen, a piston and a connecting spring. The water storage cylinder is connected to the lower end of the water inlet pipe and kept in communication. The connecting frame is connected to the inner wall of the water storage cylinder, and the outer wall of the vertical pipe is fixedly connected to the connecting frame. A round hole is opened at the bottom of the water storage cylinder. The filter screen is connected to the inner wall of the round hole. The piston is slidably connected to the outer wall of the vertical pipe and fits with the inner wall of the water storage cylinder. The connecting spring is wound around the outside of the vertical pipe, and the two ends of the connecting spring are respectively connected to the bottom of the piston and the inner bottom of the water storage cylinder.

[0007] Optionally, it also includes a mounting frame, a scraping ring, a lifting filter frame and a return spring. The mounting frame is connected to the outer wall of the water extraction pipe. The scraping ring is connected to the bottom of the mounting frame. The lifting filter frame is slidably connected to the outer wall of the water extraction pipe, and the outer wall of the lifting filter frame contacts the inner wall of the scraping ring. The return spring is wound around the outside of the water extraction pipe, and the two ends of the return spring are respectively connected to the mounting frame and the lifting filter frame.

[0008] Optionally, it also includes a limiting frame. The limiting frame is connected to the bottom of the water extraction pipe and is located inside the lifting filter frame.

[0009] Optionally, it also includes a mounting ring and elastic pieces. The mounting ring is connected to the outer wall of the limiting frame. The elastic pieces are circumferentially and spacedly connected to the outside of the mounting ring and are in contact and cooperation with the lifting filter frame.

[0010] Optionally, it also includes a connecting plate, a contact rod and rollers. The connecting plates are symmetrically connected to the inner wall of the connecting shell. The contact rods are symmetrically connected to both sides of the baffle, and the bottom of the contact rod is beveled. The rollers are symmetrically and automatically connected to the sides of the connecting plates and contact the bottom of the contact rod.

[0011] Optionally, it also includes a water outlet pipe and a solenoid valve. The water outlet pipe is connected to the water outlet of the multi-stage centrifugal pump and kept in communication. The solenoid valve is installed on the water outlet pipe.

[0012] Optionally, it further includes a connecting pipe and a valve. The connecting pipe is connected to the side of the water outlet pipe and remains in communication, and the valve is installed on the connecting pipe.

[0013] The beneficial effects are as follows: 1. Through the coordinated cooperation of the electric push rod, connecting ring, sliding frame, baffle, and water storage component, the present invention can achieve the automatic priming function before the centrifugal pump starts. When the electric push rod drives the baffle to move, it can accurately control the alignment or misalignment of the through hole between the vertical pipe and the water suction pipe, thereby ensuring the construction or cutting off of the water flow channel. At the same time, before the water flow channel is fully constructed, the water storage component uses the pre-stored water energy to prevent the inside of the water inlet pipe from being in a vacuum state, ensuring that the multi-stage centrifugal pump can start and operate normally. This design can avoid the problem of increased inlet resistance caused by traditional foot valves, significantly reduce the energy consumption of the multi-stage centrifugal pump, and improve the operating efficiency of the system.

[0014] 2. The present invention controls the construction or cutting off of the water flow channel by driving the baffle to move horizontally through the electric push rod. In this way, the sealing state can be maintained between the baffle gasket and the sealing ring all the time, so there will be no problem of impurities being caught between the baffle and the gasket and the sealing ring, and it can solve the problem that traditional foot valves are prone to seal failure and frequent maintenance due to sand grains, mud, and other solid impurities in the water source getting stuck between the valve disc and the base.

[0015] 3. The lifting filter frame of the present invention can intercept larger impurities during the water pumping process to prevent them from entering the pump body. When the filter holes of the lifting filter frame are blocked, the lifting filter frame will rise, cooperate with the scraping ring to remove the attached impurities, and push out the impurities stuck in the filter holes through the elastic piece to ensure the normal operation of the water pumping work. This design can effectively reduce the manual cleaning frequency, extend the service life of the equipment, and ensure the long-term stable operation of the drainage system.

[0016] 4. Through the linkage mechanism of the sealing ring, sealing gasket, and the contact rod and the roller, the present invention can jointly ensure the high sealing performance of the lower end of the vertical pipe and the upper end of the water suction pipe. When the baffle moves to the left, the contact rod pushes the baffle to move upward through the roller, further pressing the sealing gasket and the sealing ring to prevent the mine water accumulation from seeping into the inside of the connection shell. When the baffle resets, the contact rod drops due to its own weight to avoid the deformation of the sealing parts caused by long-term extrusion. This can not only improve the reliability of the system but also significantly reduce the maintenance cost, meeting the requirements of the complex working conditions in the mine. Description of the Drawings

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0018] Figure 2 It is a specific structural schematic diagram inside the connection shell of the present invention.

[0019] Figure 3 It is an installation schematic diagram of the sealing ring of the present invention.

[0020] Figure 4 This is a schematic diagram of the separation structure of the connecting ring and the sliding frame of the present invention.

[0021] Figure 5 This is a schematic diagram of the specific structure inside the water storage cylinder of the present invention.

[0022] Figure 6 This is an installation schematic diagram of the mounting frame, scraping ring, lifting filter frame, return spring and limit frame of the present invention.

[0023] Figure 7 This is a schematic diagram of the separation structure of the water suction pipe and the lifting filter frame of the present invention.

[0024] Figure 8 This is an installation schematic diagram of the connecting plate and the contact rod of the present invention.

[0025] Figure 9 This is a schematic diagram of the specific structure of the connecting plate and the roller of the present invention.

[0026] Figure 10 This is an installation schematic diagram of the water outlet pipe, solenoid valve, connecting pipe and valve of the present invention.

[0027] In the reference numerals: 1 - multistage centrifugal pump, 2 - water inlet pipe, 3 - vertical pipe, 301 - sealing ring, 4 - connecting shell, 5 - gasket, 6 - electric push rod, 7 - connecting ring, 8 - sliding frame, 9 - water suction pipe, 10 - rubber membrane, 11 - baffle, 1101 - through hole, 12 - water storage cylinder, 13 - connecting frame, 14 - round hole, 15 - filter screen, 16 - piston, 17 - connecting spring, 18 - mounting frame, 19 - scraping ring, 20 - lifting filter frame, 21 - return spring, 22 - limit frame, 23 - mounting ring, 24 - elastic sheet, 25 - connecting plate, 26 - contact rod, 27 - roller, 28 - water outlet pipe, 29 - solenoid valve, 30 - connecting pipe, 31 - valve. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0029] Embodiment: An automatic pump - filling mine centrifugal drainage pump, as Figures 1-5As shown in the figure, it includes a multi-stage centrifugal pump 1 and a water inlet pipe 2. The water inlet of the multi-stage centrifugal pump 1 is connected to the water inlet pipe 2 and kept in communication. It also includes a vertical pipe 3, a sealing ring 301, a connecting shell 4, a gasket 5, an electric push rod 6, a connecting ring 7, a sliding frame 8, a water suction pipe 9, a rubber membrane 10, a baffle 11 and a water storage assembly. The vertical pipe 3 is directly below the lower end of the water inlet pipe 2. The lower end of the vertical pipe 3 is connected with a sealing ring 301. The lower part of the vertical pipe 3 is connected with a connecting shell 4. A horizontal hole is opened on the left side of the bottom of the connecting shell 4. The left side of the inner top of the connecting shell 4 is connected with a gasket 5. The bottom of the gasket 5 is at the same height as the bottom of the sealing ring 301. An electric push rod 6 is installed on the right side of the inner wall of the connecting shell 4. The telescopic rod of the electric push rod 6 is connected with a connecting ring 7. Chute grooves are symmetrically opened on the inner wall of the connecting ring 7. A sliding frame 8 is slidably connected in the chute grooves. The inner wall of the sliding frame 8 is connected with a water suction pipe 9. The water suction pipe 9 is located in the horizontal hole of the connecting shell 4, so that the electric push rod 6 can drive the water suction pipe 9 to move left and right in the horizontal hole through the connecting ring 7 and the sliding frame 8. And the upper end of the water suction pipe 9 is directly below the lower end of the vertical pipe 3. A rubber membrane 10 is connected between the outer wall of the water suction pipe 9 and the bottom of the connecting shell 4. When the water suction pipe 9 moves left and right, the rubber membrane 10 can deform accordingly, which can play a sealing role to prevent water from entering the inside of the connecting shell 4. The upper end of the water suction pipe 9 is connected with a baffle 11. The top of the baffle 11 contacts and seals with the bottom of the sealing ring 301 and the bottom of the gasket 5. And a through hole 1101 is opened on the baffle 11, so that the lower end of the vertical pipe 3 and the upper end of the water suction pipe 9 can be communicated through the through hole 1101. The water storage assembly is used for temporarily storing water.

[0030] As Figure 5 shown, the water storage assembly includes a water storage cylinder 12, a connecting frame 13, a filter screen 15, a piston 16 and a connecting spring 17. The lower end of the water inlet pipe 2 is connected to the water storage cylinder 12 and kept in communication. The upper part of the inner wall of the water storage cylinder 12 is connected with a connecting frame 13. And the upper part of the outer wall of the vertical pipe 3 is fixedly connected with the middle part of the connecting frame 13. A round hole 14 is opened on the right side of the bottom of the water storage cylinder 12. And a filter screen 15 is connected to the inner wall of the round hole 14. A piston 16 is slidably connected to the outer wall of the vertical pipe 3. And the outer wall of the piston 16 fits with the inner wall of the water storage cylinder 12. A connecting spring 17 is wound around the lower part of the outer side of the vertical pipe 3. And the two ends of the connecting spring 17 are respectively connected to the bottom of the piston 16 and the inner bottom of the water storage cylinder 12.

[0031] Initially, the through-hole 1101 is aligned with the lower end of the vertical pipe 3 so that the lower end of the vertical pipe 3 communicates with the upper end of the water suction pipe 9 through the through-hole 1101. First, install the multi-stage centrifugal pump 1 at the designated position, then place the water suction pipe 9 into the accumulated water in the mine, and the water storage cylinder 12 is also immersed in the accumulated water. Then, control the telescopic rod of the electric push rod 6 to extend. The electric push rod 6 can drive the connecting ring 7 to move to the left. The connecting ring 7 can drive the sliding frame 8, the water suction pipe 9 and the baffle 11 to move to the left, so that the through-hole 1101 is no longer aligned with the lower end of the vertical pipe 3, and the top of the baffle 11 will block the lower end of the vertical pipe 3. At this time, the top of the baffle 11 is in close contact with the bottom of the gasket 5, preventing the accumulated water in the mine from entering the inside of the connecting shell 4 through the water suction pipe 9. Then, water can be manually poured from the water outlet of the multi-stage centrifugal pump 1 to fill the inside of the multi-stage centrifugal pump 1, the inside of the water inlet pipe 2, the inside of the water storage cylinder 12 and the inside of the vertical pipe 3 with water. The water in the water storage cylinder 12 is all above the piston 16. At this time, the top of the baffle 11 is in close contact with the bottom of the sealing ring 301, which can ensure the sealing performance of the lower end of the vertical pipe 3 and prevent the water inside the vertical pipe 3 from leaking downward. When it is necessary to pump the accumulated water in the mine, the multi-stage centrifugal pump 1 can be directly started. The multi-stage centrifugal pump 1 will gradually pump the water inside the water storage cylinder 12 through the water inlet pipe 2 and discharge the water from the water outlet of the multi-stage centrifugal pump 1. At this time, the pressure in the space above the piston 16 inside the water storage cylinder 12 will gradually decrease. Under the action of the atmospheric pressure, the accumulated water in the mine will enter the water storage cylinder 12 through the round hole 14 and be located below the piston 16. The filter screen 15 plays a filtering role. The accumulated water below the piston 16 will push the piston 16 upward, and the connecting spring 17 is stretched. At the same time as starting the multi-stage centrifugal pump 1, the telescopic rod of the electric push rod 6 can be controlled to shorten. The electric push rod 6 can drive the connecting ring 7 to move to the right to reset. The connecting ring 7 can drive the sliding frame 8, the water suction pipe 9 and the baffle 11 to move to the right to reset, so that the baffle 11 no longer blocks the lower end of the vertical pipe 3 until the through-hole 1101 is aligned with the lower end of the vertical pipe 3 again. At this time, the multi-stage centrifugal pump 1 can directly pump the accumulated water in the mine through the water inlet pipe 2, the water storage cylinder 12, the vertical pipe 3 and the water suction pipe 9. In this way, a complete water flow channel can be constructed, and the water flow channel is not blocked by any object. Compared with the existing bottom valve, the inlet resistance and the energy consumption of the multi-stage centrifugal pump 1 can be reduced. At this time, the pressure inside the water storage cylinder 12 gradually tends to be balanced with the atmospheric pressure, and the connecting spring 17 will return to its original state, driving the piston 16 to slowly move downward to reset. The piston 16 can squeeze the water below it to be discharged outward through the round hole 14, and the accumulated water in the mine is pumped into the water storage cylinder 12 along with the water flow channel, so that the water storage cylinder 12 is filled with water. When it is not necessary to pump the accumulated water in the mine, only need to control the telescopic rod of the electric push rod 6 to extend so that the through-hole 1101 is no longer aligned with the lower end of the vertical pipe 3, and at the same time, turn off the multi-stage centrifugal pump 1.In the above process, since it takes a certain amount of time for the through hole 1101 to be completely aligned with the vertical pipe 3, if the through hole 1101 is first controlled to be aligned with the vertical pipe 3 and then the multi-stage centrifugal pump 1 is started, the water pre-filled inside the vertical pipe 3 will directly flow down through the through hole 1101, resulting in the abnormal operation of the multi-stage centrifugal pump 1. Therefore, it is necessary to start the multi-stage centrifugal pump 1 first and then control the alignment of the through hole 1101 with the vertical pipe 3. Through the action of the water storage component, it can prevent the vacuum state from occurring inside the water inlet pipe 2 before the water flow channel is constructed, ensuring the normal operation of the multi-stage centrifugal pump 1. And the baffle 11 will always maintain a sealed state with the gasket 5 and the sealing ring 301, so no impurities will be clamped between the baffle 11, the gasket 5 and the sealing ring 301, ensuring the sealing effect.

[0032] As Figure 6 and Figure 7 shown, it further includes a mounting frame 18, a scraping ring 19, a lifting filter frame 20 and a return spring 21. The upper part of the outer wall of the water extraction pipe 9 is connected with the mounting frame 18. The mounting frame 18 is located below the rubber membrane 10, and the bottom of the mounting frame 18 is connected with the scraping ring 19. The lower part of the outer wall of the water extraction pipe 9 is slidably connected with the lifting filter frame 20. The top and bottom of the lifting filter frame 20 are both closed designs, and the outer wall of the lifting filter frame 20 is in contact with the inner wall of the scraping ring 19. A return spring 21 is wound around the outside of the water extraction pipe 9, and the two ends of the return spring 21 are respectively connected to the inner top of the mounting frame 18 and the top of the lifting filter frame 20. It further includes a limiting frame 22. The bottom of the water extraction pipe 9 is connected with the limiting frame 22, and the limiting frame 22 is located inside the lifting filter frame 20. Water inlets are circumferentially formed on the outer wall of the limiting frame 22. The size of the water inlets is the same as the size of the filter holes of the lifting filter frame 20, so that the impurities that can pass through the filter holes of the lifting filter frame 20 can pass through the water inlets on the limiting frame 22, ensuring that the water inlets on the limiting frame 22 will not be blocked. The top and bottom of the limiting frame 22 are both open designs, so that the water source can flow through the inside of the limiting frame 22 and enter the inside of the water extraction pipe 9. It further includes a mounting ring 23 and elastic pieces 24. The upper part of the outer wall of the limiting frame 22 is connected with the mounting ring 23. The outer diameter of the mounting ring 23 is smaller than the inner diameter of the lifting filter frame 20. A plurality of elastic pieces 24 are circumferentially and spacedly connected to the outside of the mounting ring 23, and the elastic pieces 24 are in contact and cooperation with the inner wall of the lifting filter frame 20.

[0033] When the water suction pipe 9 pumps out the accumulated water in the mine, the lifting filter frame 20 can filter out larger impurities in the accumulated water, preventing the larger impurities from affecting the pumping work of the multi-stage centrifugal pump 1, the water inlet pipe 2, the water storage cylinder 12, the vertical pipe 3 and the water suction pipe 9. The accumulated water and the smaller impurities in it can be pumped into the water suction pipe 9 through the lifting filter frame 20. As time goes by, the filter holes of the lifting filter frame 20 will be gradually blocked by impurities, resulting in a decrease in the water inflow at the lower end of the water suction pipe 9. At this time, the lifting filter frame 20 will rise due to the suction force at the lower end of the water suction pipe 9, and the return spring 21 will be compressed. The scraping ring 19 can scrape off the impurities adhering to the outer wall of the lifting filter frame 20, and the elastic piece 24 will exert an outward pushing force on the impurities stuck in the filter holes of the lifting filter frame 20 due to its own elasticity, so as to push the impurities stuck in the filter holes of the lifting filter frame 20 outwards to increase the water inflow at the lower end of the water suction pipe 9. Subsequently, the return spring 21 will drive the lifting filter frame 20 to descend to ensure that the water inflow at the lower end of the water suction pipe 9 is always within a certain range; the limit frame 22 can limit the rising distance of the lifting filter frame 20 to prevent the lifting filter frame 20 from rising too much and blocking the lower end of the water suction pipe 9. Since the cleaned part of the lifting filter frame 20 will rise to a height higher than the top of the scraping ring 19, if the lifting filter frame 20 is sucked to the bottom of the limit frame 22 due to the suction force at the lower end of the water suction pipe 9, the accumulated water can also enter the inside of the lifting filter frame 20 through the cleaned part of the lifting filter frame 20 and then enter the water suction pipe 9 through the limit frame 22, reducing the suction force received at the bottom inside the lifting filter frame 20 and ensuring that the return spring 21 can drive the lifting filter frame 20 to descend and disengage from the limit frame 22.

[0034] Such as Figure 8 and Figure 9As shown in the figure, it further includes a connecting plate 25, a contact rod 26 and a roller 27. The front and rear sides of the inner wall of the connecting shell 4 are both connected with a connecting plate 25. The front and rear sides of the baffle 11 are both connected with a contact rod 26. The left sides of the bottoms of the two contact rods 26 are both provided with inclined surfaces. The left and right sides of the mutually close sides of the two connecting plates 25 are both rotatably connected with a roller 27 symmetrically, and the top of the roller 27 is in contact with the bottom of the contact rod 26. When the baffle 11 moves to the left, the through hole 1101 will no longer be aligned with the lower end of the vertical pipe 3. At this time, the water pressure on the sealing gasket 5 and the sealing ring 301 is greater. The baffle 11 can drive the contact rod 26 to move to the left. Through the cooperation of the roller 27 and the inclined surface at the bottom of the contact rod 26, the roller 27 will squeeze the contact rod 26 to move upward. The contact rod 26 can drive the baffle 11 to move upward, so that the top of the baffle 11 presses tightly against the bottom of the sealing gasket 5 and the sealing ring 301, ensuring the sealing effect. Even if the sealing gasket 5 and the sealing ring 301 are worn to a certain extent after a long time of use, the gap can be effectively compensated by the rising of the baffle 11, and the sealing effect can be prolonged. When the baffle 11 moves to the right, the through hole 1101 will be aligned with the lower end of the vertical pipe 3, constructing a complete water flow channel. At this time, the water pressure on the sealing gasket 5 and the sealing ring 301 is smaller. The baffle 11 can drive the contact rod 26 to move to the right. At this time, the contact rod 26 and the baffle 11 will move downward and reset due to their own weights, so that the sealing gasket 5 and the sealing ring 301 will not be squeezed for a long time, preventing the sealing gasket 5 and the sealing ring 301 from being squeezed and deformed and losing the sealing function.

[0035] As Figure 10 shown in the figure, it further includes a water outlet pipe 28 and a solenoid valve 29. The water outlet of the multi-stage centrifugal pump 1 is connected with a water outlet pipe 28 and kept in communication. The solenoid valve 29 is installed on the water outlet pipe 28. It further includes a connecting pipe 30 and a valve 31. The right side of the water outlet pipe 28 is connected with a connecting pipe 30 and kept in communication. The valve 31 is installed on the connecting pipe 30. Initially, both the solenoid valve 29 and the valve 31 are in the closed state. The connecting pipe 30 can be externally connected to a water source. When it is necessary to fill water into the multi-stage centrifugal pump 1, the valve 31 and the solenoid valve 29 can be directly opened, so that the water can automatically fill the multi-stage centrifugal pump 1, the water inlet pipe 2, the water storage cylinder 12 and the vertical pipe 3 through the connecting pipe 30 and the water outlet pipe 28. Then the valve 31 is closed separately. When the multi-stage centrifugal pump 1 is working, the solenoid valve 29 remains open, so that the accumulated water pumped out by the multi-stage centrifugal pump 1 can be discharged normally through the water outlet pipe 28. When the multi-stage centrifugal pump 1 is not working, the solenoid valve 29 needs to be closed to prevent the accumulated water from flowing back into the multi-stage centrifugal pump 1 through the water outlet pipe 28.

[0036] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A mine centrifugal drainage pump with automatic pump priming, comprising a multi-stage centrifugal pump (1) and a water inlet pipe (2), the water inlet pipe (2) being connected to and in communication with the water inlet of the multi-stage centrifugal pump (1), characterized in that, It also includes a vertical pipe (3), a sealing ring (301), a connecting shell (4), a gasket (5), an electric push rod (6), a connecting ring (7), a sliding frame (8), a water suction pipe (9), a rubber membrane (10), a baffle (11) and a water storage assembly. The vertical pipe (3) is directly below the lower end of the water inlet pipe (2). The sealing ring (301) is connected to the lower end of the vertical pipe (3). The connecting shell (4) is connected to the lower part of the vertical pipe (3). The gasket (5) is connected to the inner top of the connecting shell (4). The electric push rod (6) is installed on the inner wall of the connecting shell (4). The connecting ring (7) is connected to the telescopic rod of the electric push rod (6). The sliding frame (8) is slidably connected to the inner wall of the connecting ring (7). The water suction pipe (9) is connected to the sliding frame (8) and is directly below the lower end of the vertical pipe (3). The rubber membrane (10) connects the outer wall of the water suction pipe (9) and the bottom of the connecting shell (4). The baffle (11) is connected to the upper end of the water suction pipe (9). The top of the baffle (11) contacts the bottom of the sealing ring (301) and the bottom of the gasket (5), and a through hole (1101) is opened on the baffle (11) so that the vertical pipe (3) and the water suction pipe (9) can communicate through the through hole (1101). The water storage assembly is used for temporarily storing water.

2. The automatic pump-filling mine centrifugal drainage pump according to claim 1, wherein The water storage assembly includes a water storage cylinder (12), a connecting frame (13), a filter screen (15), a piston (16) and a connecting spring (17). The water storage cylinder (12) is connected to the lower end of the water inlet pipe (2) and remains in communication. The connecting frame (13) is connected to the inner wall of the water storage cylinder (12), and the outer wall of the vertical pipe (3) is fixedly connected to the connecting frame (13). A round hole (14) is opened at the bottom of the water storage cylinder (12). The filter screen (15) is connected to the inner wall of the round hole (14). The piston (16) is slidably connected to the outer wall of the vertical pipe (3) and fits against the inner wall of the water storage cylinder (12). The connecting spring (17) is wound around the outside of the vertical pipe (3), and the two ends of the connecting spring (17) are respectively connected to the bottom of the piston (16) and the inner bottom of the water storage cylinder (12).

3. The automatic pump-filling centrifugal drainage pump for mines according to claim 2, wherein, It also includes a mounting frame (18), a scraping ring (19), a lifting filter frame (20) and a return spring (21). The mounting frame (18) is connected to the outer wall of the water suction pipe (9). The scraping ring (19) is connected to the bottom of the mounting frame (18). The lifting filter frame (20) is slidably connected to the outer wall of the water suction pipe (9), and the outer wall of the lifting filter frame (20) contacts the inner wall of the scraping ring (19). The return spring (21) is wound around the outside of the water suction pipe (9), and the two ends of the return spring (21) are respectively connected to the mounting frame (18) and the lifting filter frame (20).

4. An automatic pump-filling mine centrifugal drainage pump according to claim 3, characterized in that, It also includes a limiting frame (22). The limiting frame (22) is connected to the bottom of the water suction pipe (9) and is located inside the lifting filter frame (20).

5. An automatic pump-filling centrifugal drainage pump for mines according to claim 4, characterized in that, It also includes a mounting ring (23) and elastic pieces (24). The mounting ring (23) is connected to the outer wall of the limiting frame (22). The elastic pieces (24) are circumferentially spaced and connected to the outside of the mounting ring (23), and the elastic pieces (24) are in contact and cooperation with the lifting filter frame (20).

6. The automatic pump-filling mine centrifugal drainage pump according to claim 5, characterized in that, It further includes a connecting plate (25), a contact rod (26) and a roller (27). The connecting plate (25) is symmetrically connected to the inner wall of the connecting shell (4). The contact rod (26) is symmetrically connected to both sides of the baffle (11), and the bottom of the contact rod (26) is beveled. The roller (27) is symmetrically and automatically connected to the side surface of the connecting plate (25), and the roller (27) contacts the bottom of the contact rod (26).

7. An automatic pump-filling mine centrifugal drainage pump according to claim 6, characterized in that, It further includes a water outlet pipe (28) and a solenoid valve (29). The water outlet pipe (28) is connected to and in communication with the water outlet of the multistage centrifugal pump (1), and the solenoid valve (29) is installed on the water outlet pipe (28).

8. An automatic pump-filling mine centrifugal drainage pump according to claim 7, characterized in that, It further includes a connecting pipe (30) and a valve (31). The connecting pipe (30) is connected to and in communication with the side surface of the water outlet pipe (28), and the valve (31) is installed on the connecting pipe (30).

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