Brine lift pump impeller with spiral water locking blades

Abstract

The utility model belongs to the technical field of lift pumps, and particularly relates to a brine lift pump impeller with spiral water locking blades, which comprises an impeller body in transmission connection with a pump shaft, and the impeller blades of the impeller body are distributed in an annular array. A shaft sleeve is arranged at the central axis position of a rear cover plate integrally formed at the rear ends of the impeller blades, a front cover plate is integrally formed at the front ends of the impeller blades, and water locking blades are arranged on the outer side of the front cover plate. According to the water pump, the water locking blade is arranged on the outer side of the impeller front cover plate, equivalently, a special-shaped mixed flow impeller with a sealing function is arranged on the outer side of the impeller front cover plate, liquid in the pump body is sealed in the rotating operation process of the impeller, the liquid in the pump body is firmly locked in the pump body, internal leakage of the water pump can be effectively prevented, and the service life of the water pump is prolonged. And when the brine lifting pump is in fresh water flushing desalting operation, fresh water leakage can be effectively prevented, fresh water resources are saved, and smooth operation of the fresh water flushing desalting operation is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lift pumps, in particular to a brine lift pump impeller with spiral water-locking blades. Background Art

[0002] When salt forms inside the brine pump, fresh water is used to flush and desalinate the internal components of the pump through a flushing valve located on the upper portion of the pump body. Fresh water flows into the pump through the flushing valve, quickly filling the pump cavity and pipes. Since the exhaust valve is open and the pump is in a no-load operating state, the fresh water entering the pump cavity generates kinetic energy due to the rotation of the impeller, which can quickly dynamically wash the pump body and outlet pipes, thereby achieving the purpose of rapid desalination. When using fresh water to desalinate the brine lift pump and pipes, due to the gap between the impeller suction ring and the water suction chamber, the fresh water entering the pump cavity leaks into the water inlet pipe through this gap and flows back into the brine pool through the water inlet pipe. The larger the impeller, the larger the cross-sectional area of ​​the gap at the suction ring, and therefore the greater the leakage. The kinetic energy generated by the rotation of the impeller causes the fresh water in the pump cavity to have a certain pressure. The greater the pressure, the greater the leakage at the suction ring. Therefore, when the amount of flushing fresh water added is greater than the leakage amount, the water level of the flushing fresh water will flow along the outlet pipe until it reaches the outlet of the outlet pipe, thereby achieving the purpose of desalination. When the amount of flushing water added and the leakage amount at the suction ring reach a balance at a certain pressure point, the water level of the flushing fresh water will stay at a certain height in the outlet pipe and will no longer rise. The outlet pipe above the water level line cannot be flushed, and the outlet pipe is not thoroughly desalinated. When the amount of flushing fresh water added is less than the leakage amount at the suction ring, only local desalination of the pump body itself can be performed, and the desalination effect is extremely poor. Therefore, when performing fresh water flushing, During desalination operation, the success of desalination operation depends on the amount of fresh water flushing water and the leakage at the suction ring. Some brine lifting pump stations have large brine delivery requirements, and most of them use large-flow, large-diameter brine lifting pumps. The leakage at the impeller suction ring of the original brine lifting pump is large, which cannot meet the requirements of fresh water flushing and desalination operation. The brine lifting pump station is located in a saline area with scarce fresh water resources. The flushing pumps used to transport fresh water are all low-lift, small-flow water pumps. The flow of the flushing pump is small. How to reduce or even eliminate the leakage problem at the impeller suction ring is a technical problem that urgently needs to be solved. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the deficiencies of the prior art, the utility model provides a brine lift pump impeller with spiral water-locking blades, which solves the problem of fresh water leaking from the impeller suction ring during fresh water flushing and desalination operations.

[0005] (2) Technical solution

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] The brine lifting pump impeller with spiral water-locking blades includes an impeller body that is transmission-connected to the pump shaft. The impeller blades of the impeller body are distributed in a ring array. A shaft sleeve is provided at the center axis position of a rear cover plate integrally formed at the rear end of the impeller blades, and a front cover plate is integrally formed at the front end. Water-locking blades are provided on the outer side of the front cover plate at the front end of the impeller blades.

[0008] Furthermore, the water-locking blades are spiral blades, which are distributed in an annular array on a front cover plate and located in the lower middle part of the impeller body after installation to form a special-shaped mixed flow impeller;

[0009] The spiral blades are spirally distributed on the outer side wall of the front cover plate, and a spiral guide groove spiraling upward is formed between two adjacent spiral blades. The spiral guide grooves are evenly distributed in the middle and lower part of the impeller body.

[0010] Furthermore, a shaft sleeve provided at the central axis of the rear cover plate is provided with a shaft hole for assembly and connection with the pump shaft, and a keyway is provided on the inner wall of the shaft hole.

[0011] (3) Beneficial effects

[0012] Compared with the prior art, the present invention provides a brine lift pump impeller with spiral water-locking blades, which has the following beneficial effects:

[0013] The utility model has water-locking blades installed in the middle and lower part of the impeller, which is equivalent to a special-shaped mixed-flow impeller with a sealing function installed on the outer side of the impeller front cover. The liquid in the pump body is sealed during the rotation of the impeller, and the liquid in the pump body is firmly locked in the pump body, which can effectively prevent internal leakage of the water pump and improve efficiency. When the brine lifting pump is in fresh water flushing and desalination operation, it can effectively prevent fresh water leakage, save fresh water resources, and ensure the smooth progress of the fresh water flushing and desalination operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a schematic structural diagram of the utility model from an inclined viewing angle.

[0016] In the figure: 1. impeller body; 101. impeller blades; 102. rear cover; 103. shaft sleeve; 104. front cover; 105. water-locking blades. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example

[0019] The brine lifting pump impeller with spiral water-locking blades includes an impeller body 1 that is transmission-connected to the pump shaft. The impeller blades 101 of the impeller body 1 are distributed in a ring array. A shaft sleeve 103 is provided at the center axis position of a rear cover plate 102 integrally formed at the rear end of the impeller blade 101, and a front cover plate 104 is integrally formed at the front end. The impeller blades 101 are stably placed between the rear cover plate 102 and the front cover plate 104 to form a stable impeller. When the pump body is running, the impeller is driven to rotate smoothly in the pump body, thereby completing the operation. The brine is extracted and lifted, and the brine is transported to the use location. At the same time, the entire impeller is stably installed on the pump shaft using the provided shaft sleeve 103, thereby ensuring that the pump body drives the impeller to rotate stably and smoothly, improving the convenience of impeller installation, and facilitating the rapid installation of the impeller. A water-locking blade 105 is provided on the front cover plate 104 at the front end of the impeller blade 101, so as to form a stable water-locking component at the lower part of the impeller, which is equivalent to installing a special-shaped mixed flow impeller with a sealing effect on the outer side of the impeller front cover plate. During the rotation of the impeller The liquid in the pump body is sealed and locked firmly in the pump body to improve the efficiency of the water pump. The number of water-locking blades is determined according to the performance of the brine lifting pump, normally 5-7 pieces. The water-locking blades 105 share a suction port with the impeller. The outer diameter of the water-locking blades is slightly larger than that of the impeller, normally 1.02-1.03 times that of the impeller. Brine enters the water-locking blades 105 from the suction port and enters the pump casing under the action of the centrifugal force and spiral lifting force generated by the rotation of the impeller. The lift generated by the water-locking blades 105 is 1.02-1.0 times that of the impeller. 5 times, the flow delivered by the water-locking blades 105 is about 2%-4% of the impeller, and the shaft power consumed by the water-locking blades 105 is about 3%-5% of the impeller. The impeller equipped with the water-locking blades 105 can effectively reduce the internal leakage of the water pump, and the comprehensive efficiency is increased by about 1%-2% compared with the original impeller. The impeller is mainly suitable for brine lifting pumps with high specific speed. In normal brine transportation operations, it is equivalent to connecting a special-shaped mixed flow impeller in series at the middle and lower part of the impeller, which simultaneously participates in the brine transportation operation and improves the overall efficiency of the brine lifting pump.

[0020] like Figure 2As shown, in some embodiments, the water-locking blades 105 are spiral blades, which are distributed in an annular array on the front cover 104 and located in the middle and lower part of the impeller body 1 after installation to form a special-shaped mixed flow impeller, which is improved on the basis of the original brine lifting pump impeller by removing the suction ring plate of the original brine lifting pump;

[0021] The spiral blades are spirally distributed on the outer side wall of the front cover plate 104, and a spiral guide groove spiraling upward is formed between two adjacent spiral blades. The spiral guide grooves are evenly distributed in the middle and lower part of the impeller body 1. When performing fresh water flushing and desalination operations, it is equivalent to installing a special-shaped mixed flow impeller with sealing performance on the middle and lower part of the impeller to seal the liquid in the pump body, which can effectively prevent fresh water leakage, save fresh water resources, and ensure the smooth progress of fresh water flushing and desalination operations.

[0022] During the fresh water flushing and desalination operation, when flushing the pump body, the high-pressure fresh water injected into the pump casing enters the water-locking blades 105 at the upper part of the water-locking blades 105 and the guide ring under the action of gravity and pressure. The fresh water entering the water-locking blades 105 generates a certain pressure due to the centrifugal force of the blade rotation and the spiral lifting force, and reaches a pressure balance with the fresh water in the pump casing on the upper part of the water-locking blades 105. The high-energy liquid on the upper part of the water-locking blades 105 is thrown into the pump casing by the water-locking blades 105 under the action of centrifugal force and spiral lifting, forming a microcirculation. Fresh water continuously enters from the pump casing to The high-pressure fresh water in the pump casing is constantly thrown into the water-locking blades 105 and circulated back and forth. The high-pressure fresh water in the pump casing can never leak at the water-locking blades 105, and the fresh water is firmly locked in the pump cavity, so that the fresh water entering the pump casing can only flow through the pump casing along the outlet pipe to the pipe outlet under the kinetic energy generated by the impeller. The flowing fresh water continuously flushes and dissolves the pump cavity and the inner wall of the pipe, thereby achieving the purpose of rapid desalination. When the brine lifting pump is in fresh water flushing and desalination operation, it can effectively prevent fresh water leakage, save fresh water resources, and ensure the smooth progress of fresh water flushing and desalination operations.

[0023] like Figure 1 As shown, in some embodiments, an axial hole for assembling and connecting to the pump shaft is provided on the shaft sleeve 103 provided at the central axis of the rear cover plate 102, and a keyway is provided on the inner wall of the axial hole to facilitate stable and smooth installation of the impeller on the pump shaft. The keyway is convenient to cooperate with the keyway at the corresponding position on the pump shaft to form a space for placing the key. The impeller and the pump shaft are fixed by means of a key and a nut, which improves the stability of the impeller installed on the output shaft. When the pump body is running, the impeller is driven to rotate smoothly in the pump body.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A brine lift pump impeller with spiral water-locking blades, comprising an impeller body (1) drivingly connected to a pump shaft, wherein the impeller blades (101) of the impeller body (1) are distributed in an annular array, a rear cover plate (102) integrally formed at the rear end of the impeller blades (101) is provided with a shaft sleeve (103) at the center axis position, and a front cover plate (104) integrally formed at the front end, characterized in that: A water-locking blade (105) is provided on the outside of the front cover plate (104) at the front end of the impeller blade (101).

2. The brine lift pump impeller with spiral water-locking blades according to claim 1, characterized in that: The water-locking blades (105) are spiral blades, which are distributed in an annular array outside the front cover plate (104) and located in the lower middle part of the installed impeller body (1) to form a special-shaped mixed flow impeller.

3. The brine lift pump impeller with spiral water-locking blades according to claim 2, characterized in that: The spiral blades are distributed in a spiral shape on the outer side wall of the front cover plate (104), and a spiral guide groove spiraling upward is formed between two adjacent spiral blades. The spiral guide grooves are evenly distributed in the middle and lower part of the impeller body (1).

4. The brine lift pump impeller with spiral water-locking blades according to claim 1, characterized in that: An axial hole for assembling and connecting with the pump shaft is provided on the shaft sleeve (103) arranged at the central axis of the rear cover plate (102), and a key groove is provided on the inner wall of the shaft hole.

Images