A priming device and a multi-stage pump drainage system having the same
Patent Information
- Application Number
- CN202522219673.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-21
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-10-21
AI Technical Summary
[0002]多级泵属于离心泵的一种，其吸水过程依赖叶轮旋转产生的离心力形成负压，将水源的水吸入泵体，若泵体或吸水管路中残留空气，会直接破坏这一负压环境，引发以下两种问题，首先空气的存在会导致“气缚”现象的发生，即叶轮旋转时仅能带动空气运动，无法形成足够负压，泵体无法有效吸水，最终导致启动失败；其次即使少量空气残留，也会在叶轮负压区形成气泡，气泡随水流运动至高压区破裂时，会产生高频冲击力，造成叶轮、泵壳表面的气蚀损伤，缩短设备寿命并产生异响，并且空气占据泵内空间会降低有效吸水容积，导致泵的实际流量、扬程大幅下降，无法达到设计工况，影响系统输水效率
[0012]与现有技术相比，本实用新型提供的一种引水免灌装置及具有该装置的多级泵排水系统具有如下有益效果：首先，引水免灌装置的过滤箱结构能够过滤水仓中水介质的杂质，避免过大的杂质进入多级泵造成多级泵的堵塞；然后，引水免灌装置的过滤挡板设置为倾斜结构，过滤后的杂质能够沿着倾斜的过滤挡板直接进入杂质收集箱中，避免杂质停留于过滤网上造成过滤网的堵塞；其次，引水免灌装置的杂质收集箱不仅能够对杂质进行集中收集，而且通过杂质收集箱底部的杂质排放口能够对过滤网进行清洗和更换；最后，利用泵出管内具有一定压力的水介质，能够自动地清洗过滤网，同时也能够对引水免灌装置的水介质进行补充，保证了下次多级泵的顺利启动。
Smart Images
Figure CN224742631U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of multi-stage pump drainage systems, specifically relating to a water intake device without irrigation and a multi-stage pump drainage system having the device. Background Technology
[0002] Multistage pumps are a type of centrifugal pump. Their water intake process relies on the centrifugal force generated by the impeller rotation to create negative pressure, drawing water from the source into the pump body. If air remains in the pump body or the suction pipe, it will directly disrupt this negative pressure environment, causing the following two problems. First, the presence of air will lead to "air binding," meaning that when the impeller rotates, it can only move air and cannot create sufficient negative pressure, preventing the pump body from effectively drawing water and ultimately causing start-up failure. Second, even a small amount of air remaining will form bubbles in the impeller's negative pressure zone. When these bubbles move with the water flow to the high-pressure zone and burst, they generate high-frequency impact forces, causing cavitation damage to the impeller and pump casing surfaces, shortening equipment life and producing abnormal noise. Furthermore, air occupying space inside the pump will reduce the effective suction volume, resulting in a significant decrease in the pump's actual flow rate and head, failing to meet design operating conditions and affecting the system's water delivery efficiency.
[0003] Currently, the vacuum pumping methods commonly used in mining multistage pumps mainly include vacuum pumps and jet pumps. Vacuum pumps are connected to the pump body or suction pipes and actively extract air from the pipes to create a vacuum. However, the mining environment is harsh and complex, and the mechanical components of vacuum pumps are prone to wear in the high humidity and dusty environment of mines. In addition, vacuum pumps consume a lot of electricity during long-term operation, especially in large mines where multistage pumps are used in conjunction with vacuum pumps, resulting in high operating costs. Jet pumps use high-pressure water (or steam) to generate a high-speed jet through nozzles, creating negative pressure in the suction chamber of the jet pump to extract air from the pump body and pipes. However, the vacuum level produced is limited and cannot meet the high vacuum requirements of deep wells and other operating scenarios. In addition, water consumption is high. Furthermore, jet pumps have strict requirements for the purity of the working medium. Mud and impurities in mine water can easily clog the nozzles, affecting the jetting effect and reducing vacuuming performance. Frequent nozzle cleaning also increases the workload of operation and maintenance.
[0004] In view of this, in order to solve the drawbacks and technical difficulties of starting a multistage pump in a mine by vacuuming, simplify the operation process and steps of the multistage pump in a mine, and reduce the complexity of operation, there is an urgent need for a high-efficiency multistage pump priming device and a multistage pump drainage system with such device. Summary of the Invention
[0005] This utility model proposes a water intake and irrigation-free device and a multi-stage pump drainage system with the device. By installing a high-efficiency water intake and irrigation-free device in series on the inlet pipe of the multi-stage pump, the technical problem of vacuuming during the start-up of the multi-stage pump is solved.
[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A water-priming-free device includes a housing, a water inlet pipe, a filter box, an impurity collection box, a backwash pipe, a partition, a buffer plate, and a water outlet pipe. The housing is square. The filter box is located on the top side of the inner cavity of the housing, with an inclined filter baffle at the bottom. The impurity collection box is located on the outside of the housing, its fixed position corresponding to the filter box. Several circular overflow holes are provided on the housing near the bottom of the impurity collection box. The inlet of the water inlet pipe is located outside the housing and near the bottom of the housing. A flange is provided at the inlet of the water inlet pipe. The outlet of the water inlet pipe extends into the filter box. The backwash pipe is fixed to the housing. On the vertical sidewall, the inlet of the backwash pipe is located outside the housing and is equipped with a flange connection plate. The outlet of the backwash pipe is connected to the filter baffle of the filter box. The partition is vertically fixed to the bottom of the housing, dividing the housing into two chambers, left and right. One buffer plate is horizontally fixed to the sidewall of the vertical partition and a gap is maintained between it and the sidewall of the housing. The other buffer plate is horizontally fixed to the sidewall of the inner cavity of the housing and a gap is maintained between it and the sidewall of the vertical partition. This reduces the impact and fluctuation of the water medium flowing from the left chamber of the vertical partition to the right chamber. The outlet of the water outlet pipe is located outside the housing and near the bottom of the housing. A flange connection plate is installed at the outlet of the water outlet pipe. The inlet of the water outlet pipe is located inside the housing and below the bottommost buffer plate.
[0007] Furthermore, the filter baffle is a hollow structure with several flushing holes on its top surface. The filter screen is laid on top of the filter baffle, and backwash water enters the filter baffle through the backwash pipe. Due to the high pressure of the backwash water, it is sprayed out from the flushing holes on the top of the filter baffle, which can flush away impurities and foreign objects attached to the surface of the filter screen, thereby achieving the purpose of cleaning the filter screen.
[0008] Furthermore, an exhaust valve and a water filling pipe are installed on the top of the box. When using the water-priming device for the first time, the exhaust valve is opened, and some water medium is injected into the box through the water filling pipe. When the liquid level of the water medium in the box is higher than the outlet height of the multi-stage pump, it indicates that the water filling process is over. At this time, the exhaust valve and the valve of the water filling pipe are closed. At the same time, an inspection port is provided on the side wall of the box to facilitate maintenance and repair of the inside of the box during shutdown or maintenance. Two drain pipes are installed on the side wall of the box near the bottom. One drain pipe is connected to the left chamber of the box, and the other drain pipe is connected to the right chamber of the box.
[0009] Furthermore, the impurity collection box is provided with an impurity discharge port at the bottom. When the machine is stopped, opening the impurity discharge port at the bottom of the impurity collection box can collect and process the impurities in the impurity collection box. At the same time, the filter screen can be cleaned with cleaning tools, and the filter screen can be replaced periodically through the impurity discharge port.
[0010] Furthermore, the water inlet pipe, backwash pipe, water outlet pipe, air vent valve, and water filling pipe are all connected to the tank body by welding. The impurity discharge port at the bottom of the impurity collection box is sealed with a sealing strip to ensure the sealing performance of the inner cavity of the tank.
[0011] A multi-stage pump drainage system with a water intake and irrigation-free device includes a water tank, an inlet pipe, a water intake and irrigation-free device, a pump inlet pipe, a multi-stage pump, a motor, a pump outlet pipe, and a flushing bypass. One end of the inlet pipe is immersed in the water medium in the water tank, and the other end of the inlet pipe is connected to the water intake inlet pipe of the water intake and irrigation-free device. One end of the pump inlet pipe is connected to the water intake outlet pipe of the water intake and irrigation-free device, and the other end of the pump inlet pipe is connected to the inlet of the multi-stage pump through a shut-off valve. The multi-stage pump and the motor are mounted on the same base. The outlet of the multi-stage pump is connected to the pump outlet pipe in sequence through an outlet short circuit, a check valve, and an electric gate valve. One end of the flushing bypass is connected to the backwash pipe of the water intake and irrigation-free device, and the other end of the flushing bypass is connected to the pump outlet pipe through a solenoid valve.
[0012] Compared with the prior art, the water-priming-free device and the multi-stage pump drainage system with the device provided by this utility model have the following beneficial effects: First, the filter box structure of the water-priming-free device can filter impurities in the water medium in the water tank, preventing excessively large impurities from entering the multi-stage pump and causing blockage; second, the filter baffle of the water-priming-free device is set with an inclined structure, so that the filtered impurities can directly enter the impurity collection box along the inclined filter baffle, preventing impurities from remaining on the filter screen and causing blockage; third, the impurity collection box of the water-priming-free device can not only collect impurities in a concentrated manner, but also clean and replace the filter screen through the impurity discharge port at the bottom of the impurity collection box; finally, the water medium with a certain pressure in the pump outlet pipe can automatically clean the filter screen, and at the same time replenish the water medium of the water-priming-free device, ensuring the smooth start-up of the multi-stage pump next time. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structural system of this utility model; Figure 2 This is a diagram showing the internal structure of the water diversion and irrigation-free device of this utility model; Figure 3 This is an overall structural diagram of the water diversion and irrigation-free device of this utility model.
[0014] The markings in the diagram are as follows: 1: Water tank; 2: Inlet pipe; 3: Water intake device; 31: Inlet pipe; 32: Filter box; 321: Filter baffle; 33: Impurity collection box; 331: Overflow hole; 34: Backwash pipe; 35: Baffle; 36: Buffer plate; 37: Outlet pipe; 381: Air vent valve; 382: Filling pipe; 383: Inspection port; 39: Box body; 4: Pump inlet pipe; 41: Shut-off valve; 5: Multistage pump; 6: Motor; 7: Pump outlet pipe; 71: Outlet short circuit; 72: Check valve; 73: Electric gate valve; 8: Flushing bypass; 81: Solenoid valve. Detailed Implementation
[0015] In the description of this utility model, it should be noted that the terms "left", "right", "front", "rear", "inner", "outer", "both ends", "one end", "the other end", etc., indicate the orientation or positional relationship based on the fluid medium flow direction shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0016] 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 1-3 An embodiment of the present invention will be further described below.
[0017] See appendix Figure 1-3As a preferred embodiment, the water-inlet irrigation-free device of this utility model includes a housing 39, a water inlet pipe 31, a filter box 32, an impurity collection box 33, a backwash pipe 34, a partition 35, a buffer plate 36, and a water outlet pipe 37. The housing 39 is square. The filter box 32 is located on the top side of the inner cavity of the housing 39, and an inclined filter baffle 321 is provided at the bottom of the filter box 32. The impurity collection box 33 is located on the outside of the housing 39, and its fixed position corresponds to that of the filter box 32. Several circular overflow holes 331 are provided on the housing 39 near the bottom of the impurity collection box 33. The inlet of the water inlet pipe 31 is located outside the housing 39 and near the bottom of the housing 39. A flange connection is provided at the inlet of the water inlet pipe 31. The outlet of the water inlet pipe 31 extends into the filter box 32. The backwash pipe 34 is fixed to... On the vertical side wall of the housing 39, the inlet of the backwash pipe 34 is located outside the housing 39 and is equipped with a flange connection plate. The outlet of the backwash pipe 34 is connected to the filter baffle 321 of the filter box 32. The partition 35 is vertically fixed to the bottom of the housing 39, dividing the housing 39 into two chambers, left and right. One buffer plate 36 is horizontally fixed to the side wall of the vertical partition 35 and a gap is maintained between it and the side wall of the housing 39. The other buffer plate 36 is horizontally fixed to the inner side wall of the housing 39 and a gap is maintained between it and the side wall of the vertical partition 35, reducing the impact fluctuation of the water medium flowing from the left chamber of the vertical partition 35 to the right chamber. The outlet of the water outlet pipe 37 is located outside the housing 39 and near the bottom of the housing 39. A flange connection plate is provided at the outlet of the water outlet pipe 37. The inlet of the water outlet pipe 37 is located inside the housing 39 and below the bottom buffer plate 36.
[0018] As a preferred embodiment, the housing 39 of the water-priming-free device 3 can be made of cast iron or stainless steel by welding. To ensure the airtightness of the housing 39, the welded parts in the housing 39 adopt a double-layer welding method. When the water inlet pipe 31, backwash pipe 34 and water outlet pipe 37 are connected to the corresponding pipes through flanges, an annular sealing groove can be set at the flange connection, and an O-ring is used to further ensure the overall airtightness of the housing 39.
[0019] In a preferred embodiment, the filter baffle 321 has a hollow structure, and several flushing holes are provided on the top surface of the filter baffle 321. The filter screen is laid on the top of the filter baffle 321, and the backwash water enters the filter baffle 321 through the backwash pipe 34. Since the backwash water has high pressure, it is sprayed out from the flushing holes on the top of the filter baffle 321, which can flush away impurities and foreign objects attached to the surface of the filter screen, thereby achieving the purpose of cleaning the filter screen.
[0020] In a preferred embodiment, the filter baffle 321 is made of stainless steel pipe or ordinary steel pipe by welding. The density of the pipes in the filter baffle 321 can be determined according to the impurities contained in the water medium in the water tank 1. The upper surface of the welded filter baffle 321 can be drilled to open several flushing holes. The angle of the flushing holes can be different, which can effectively increase the flushing area of the filter screen.
[0021] In a preferred embodiment, the top of the housing 39 is provided with an exhaust valve 381 and a water filling pipe 382. When the water-priming device 3 is used for the first time, the exhaust valve 381 is opened, and part of the water medium is injected into the housing 39 through the water filling pipe 382. When the liquid level of the water medium in the housing 39 is higher than the outlet height of the multi-stage pump 5, it indicates that the water filling process is over. At this time, the valves of the exhaust valve 381 and the water filling pipe 382 are closed. At the same time, an inspection port 383 is provided on the side wall of the housing 39 to facilitate maintenance and repair of the inside of the housing 39 during shutdown or maintenance. Two drain pipes are provided on the side wall of the housing 39 near the bottom. One drain pipe is connected to the left chamber of the housing 39, and the other drain pipe is connected to the right chamber of the housing 39.
[0022] In a preferred embodiment, the impurity collection box 33 is provided with an impurity discharge port at the bottom. When the machine is stopped, opening the impurity discharge port at the bottom of the impurity collection box 33 can collect and process the impurities in the impurity collection box 33. At the same time, the filter screen can be cleaned by cleaning tools, and the filter screen can be replaced periodically through the impurity discharge port.
[0023] In a preferred embodiment, the water inlet pipe 31, backwash pipe 34, water outlet pipe 37, air vent valve 381, and water filling pipe 382 are all connected to the box body 39 by welding. The impurity discharge port at the bottom of the impurity collection box 33 is sealed by a sealing strip to ensure the sealing performance of the inner cavity of the box body 39.
[0024] As a preferred embodiment, the multi-stage pump drainage system with a water intake and irrigation-free device includes a water tank 1, an inlet pipe 2, a water intake and irrigation-free device 3, a pump inlet pipe 4, a multi-stage pump 5, a motor 6, a pump outlet pipe 7, and a flushing bypass 8. One end of the inlet pipe 2 is immersed in the water medium in the water tank 1, and the other end of the inlet pipe 2 is connected to the water intake inlet pipe 31 of the water intake and irrigation-free device 3. One end of the pump inlet pipe 4 is connected to the water intake outlet pipe 37 of the water intake and irrigation-free device 3, and the other end of the pump inlet pipe 4 is connected to the inlet of the multi-stage pump 5 through a shut-off valve 41. The multi-stage pump 5 and the motor 6 are mounted on the same base. The outlet of the multi-stage pump 5 is connected to the pump outlet pipe 7 in sequence through an outlet short circuit 71, a check valve 72, and an electric gate valve 73. One end of the flushing bypass 8 is connected to the backwash pipe 34 of the water intake and irrigation-free device 3, and the other end of the flushing bypass 8 is connected to the pump outlet pipe 7 through a solenoid valve 81.
[0025] As a preferred embodiment, the water-priming-free device and the multi-stage pump drainage system with the device described in this utility model, before first use, open the shut-off valve 41 and close the electric gate valve 73 and the solenoid valve 81, and simultaneously open the exhaust valve 381 of the water-priming-free device 3. Sufficient water medium is injected into the water-priming-free device 3 through the water filling pipe 382. When the liquid level of the water medium in the tank 39 is higher than the outlet height of the multi-stage pump 5, close the exhaust valve 381 and the valve of the water filling pipe 382. At this time, start the multi-stage pump 5 and open the electric gate valve 73. During the drainage process of the multi-stage pump 5, since the water-priming-free device 3 is in a sealed state, as the pressure inside the water-priming-free device 3 decreases, the water medium in the water tank 1 enters the water-priming-free device 3 under atmospheric pressure. After being filtered by the filter box 32, it enters the inner cavity of the water-priming-free device 3. In the left chamber, when the water medium in the left chamber of the water-priming-free device 3 overflows the vertical partition 35 and enters the right chamber, the water medium enters the multistage pump 5 stably under the action of the two buffer plates 36, avoiding the impact of unstable flow of the multistage pump 5 on the entire pump unit; when the multistage pump 5 stops running, the water medium in the pump outlet pipe 7 remains in the pump outlet pipe 7 under the action of the check valve 72. At this time, the solenoid valve 81 of the flushing bypass 8 is opened, and the water medium in the pump outlet pipe 7 enters the filter baffle 321 along the flushing bypass 8 and the backwash pipe 34. Since the water medium in the pump outlet pipe 7 has a certain pressure, it can automatically flush the filter screen of the filter baffle 321, ensuring the cleanliness of the filter screen when draining next time. The backwash water medium will remain in the water-priming-free device 3, and the multistage pump 5 can be started without pre-filling water when using the drainage system again.
[0026] 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 water intake and irrigation-free device, comprising a housing (39), a water inlet pipe (31), a filter box (32), an impurity collection box (33), a backwash pipe (34), a partition plate (35), a buffer plate (36), and a water outlet pipe (37), characterized in that: The housing (39) is square. The filter box (32) is located on the top side of the inner cavity of the housing (39). An inclined filter baffle (321) is provided at the bottom of the filter box (32). The impurity collection box (33) is located on the outside of the housing (39). The fixed position of the impurity collection box (33) corresponds to that of the filter box (32). Several circular overflow holes (331) are provided on the housing (39) that is in contact with the bottom of the impurity collection box (33). The inlet of the water inlet pipe (31) is located outside the housing (39) and near the bottom of the housing (39). A flange connection plate is provided at the inlet of the water inlet pipe (31). The outlet of the water inlet pipe (31) extends into the filter box (32). The backwash pipe (34) is fixed on the vertical side wall of the housing (39). The inlet is located outside the box (39) and is provided with a flange connection plate. The outlet of the backwash pipe (34) is connected to the filter baffle (321) of the filter box (32). The partition (35) is vertically fixed to the bottom of the box (39). One buffer plate (36) is horizontally fixed to the side wall of the vertical partition (35) and a gap is maintained between it and the side wall of the box (39). Another buffer plate (36) is horizontally fixed to the side wall of the inner cavity of the box (39) and a gap is maintained between it and the side wall of the vertical partition (35). The outlet of the water outlet pipe (37) is located outside the box (39) and near the bottom of the box (39). A flange connection plate is provided at the outlet of the water outlet pipe (37). The inlet of the water outlet pipe (37) is located inside the box (39) and below the bottom buffer plate (36).
2. The water diversion and irrigation-free device according to claim 1, characterized in that: An exhaust valve (381) and a water filling pipe (382) are provided on the top of the box (39). An inspection port (383) is provided on the side wall of the box (39). Two drain pipes are provided on the side wall of the box (39) near the bottom. One drain pipe is connected to the left chamber of the box (39), and the other drain pipe is connected to the right chamber of the box (39).
3. The water diversion and irrigation-free device according to claim 1, characterized in that: An impurity discharge port is provided at the bottom of the impurity collection box (33), and the impurity discharge port at the bottom of the impurity collection box (33) is sealed by a sealing strip.
4. The water diversion and irrigation-free device according to claim 1, characterized in that: The water inlet pipe (31), backwash pipe (34), water outlet pipe (37), air vent valve (381) and water filling pipe (382) are all connected to the box body (39) by welding.
5. A multi-stage pump drainage system with a water intake and irrigation-free device, comprising a water tank (1), an inlet pipe (2), a water intake and irrigation-free device (3), a pump inlet pipe (4), a multi-stage pump (5), a motor (6), a pump outlet pipe (7), and a flushing bypass (8), characterized in that: One end of the inlet pipe (2) is immersed in the water medium in the water tank (1), and the other end of the inlet pipe (2) is connected to the water inlet pipe (31) of the water-inlet device (3). One end of the pump inlet pipe (4) is connected to the water outlet pipe (37) of the water-inlet device (3). The other end of the pump inlet pipe (4) is connected to the inlet of the multi-stage pump (5) through the shut-off valve (41). The multi-stage pump (5) and the motor (6) are installed on the same base. The outlet of the multi-stage pump (5) is connected to the pump outlet pipe (7) in sequence through the outlet short circuit (71), the check valve (72), and the electric gate valve (73). One end of the flushing bypass (8) is connected to the backwash pipe (34) of the water-inlet device (3), and the other end of the flushing bypass (8) is connected to the pump outlet pipe (7) through the solenoid valve (81).