Brine lift pump impeller with arc-shaped 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 arc-shaped 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 water locking blade cover plate is arranged at the front end of a front cover plate integrally formed at the front end, and water locking blades are arranged in front of the water locking blade cover plate. According to the utility model, the water locking blade arranged at the lower part of the impeller is equivalent to a sealing impeller arranged on the front cover plate of the impeller, and liquid in the pump body is sealed in the rotating operation process of the impeller, so that the liquid in the pump body is firmly locked in the pump body, the internal leakage of the water pump can be effectively prevented, and the efficiency of the water pump is improved; 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 it is guaranteed that fresh water flushing desalting operation is conducted smoothly.

Description

Technical Field

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

[0002] After the currently operating brine pump forms salt deposits inside, fresh water is used to flush and desalt the various components inside the pump body through a flushing valve provided at the upper part of the pump body. The fresh water flows into the pump through the flushing valve and quickly fills the pump cavity and pipeline. Since the exhaust valve is open and the pump is in an idling operation state, the fresh water entering the pump cavity generates kinetic energy due to the rotation of the impeller, and can quickly perform dynamic washing on the pump body and the outlet pipeline, thereby achieving the purpose of rapid desalting. When using fresh water to desalt the brine lift pump and pipeline, due to the mating clearance between the impeller suction ring and the water suction chamber, the fresh water entering the pump cavity leaks from this clearance to the inlet pipeline and flows back to the brine pond through the inlet pipeline. The larger the impeller, the larger the cross-sectional area of the mating clearance at the suction ring, and thus the larger the leakage amount. The kinetic energy generated by the rotation of the impeller makes the fresh water in the pump cavity have a certain pressure. The greater the pressure, the larger the leakage amount at the suction ring. Therefore, when the flushing fresh water filling amount is greater than the leakage amount, the water level line of the flushing fresh water will flow along the outlet pipeline until the outlet of the outlet pipe, thereby achieving the desalting purpose. When the flushing water filling amount and the leakage amount at the suction ring reach equilibrium at a certain pressure point, the water level line of the flushing fresh water will stay at a certain height in the outlet pipeline and will not rise anymore, and it is impossible to flush the outlet pipeline above the water level line, resulting in incomplete desalting of the outlet pipeline. When the filling amount of the flushing fresh water is less than the leakage amount at the suction ring, only partial desalting of the pump body itself can be carried out, and the desalting effect is extremely poor. Therefore, when performing the fresh water flushing and desalting operation, whether the desalting operation is successful depends on the flushing water volume of the fresh water and the leakage amount at the suction ring. Some brine lift pump stations have relatively large requirements for brine transportation volume, and mostly use large-flow and large-diameter brine lift pumps. The leakage amount at the suction ring of the original brine lift pump impeller is relatively large, which cannot meet the requirements of the fresh water flushing and desalting operation. The brine lift pump room is located in a saline area where fresh water resources are scarce. The flushing pumps used to transport fresh water are all low-lift and small-flow water pumps, and the flow rate 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 at present. Content of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] Aiming at the deficiencies of the prior art, the utility model provides an impeller of a brine lift pump with arc-shaped water locking blades, which solves the problem that fresh water leaks from the impeller suction ring during the fresh water flushing and desalting operation.

[0005] (2) Technical Solutions

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

[0007] The brine lifting pump impeller with arc-shaped water-locking blades comprises an impeller body drivingly connected to a pump shaft, the impeller blades of the impeller body are distributed in a ring array, a shaft sleeve is arranged at the center axis position of a rear cover plate integrally formed at the rear end of the impeller blades, a water-locking blade cover plate is arranged at the front end of a front cover plate integrally formed at the front end, and a water-locking blade is arranged at the front end of the water-locking blade cover plate.

[0008] Furthermore, the water-locking blades are arc-shaped blades, which are distributed in a circular array on one side of an integrally arranged water-locking blade cover plate, and the water-locking blade cover plate is integrally arranged on the front cover plate;

[0009] The arc-shaped blades have the same bending direction and the same rotation direction as the impeller blades, and an arc-shaped guide groove is formed between two adjacent arc-shaped blades, and the arc-shaped guide grooves are evenly distributed in the lower part of the impeller body.

[0010] Furthermore, an axial hole for assembling and connecting with the pump shaft is formed on the shaft sleeve arranged at the central axis of the rear cover plate, and a keyway is formed on the inner wall of the shaft hole.

[0011] (III) Beneficial effects

[0012] Compared with the prior art, the utility model provides a brine lift pump impeller with arc-shaped water-locking blades, which has the following beneficial effects:

[0013] The utility model installs a water-locking blade on the lower part of the impeller, which is equivalent to installing a sealing impeller on the front cover plate of the impeller. 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 the efficiency of the water pump. When the brine lifting pump is in the 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 schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the inclined viewing angle structure of the utility model.

[0016] In the figure: 1, impeller body; 101, impeller blades; 102, rear cover plate; 103, shaft sleeve; 104, front cover plate; 105, water-locking blade cover plate; 106, water-locking blades. DETAILED DESCRIPTION

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

[0018] Example

[0019] like Figure 1 and Figure 2 As shown, in some embodiments, the brine lifting pump impeller with arc-shaped water-locking blades includes an impeller body 1 drivingly connected to the pump shaft, and the impeller blades 101 of the impeller body 1 are distributed in a ring array. The rear end of the impeller blade 101 is integrally formed with a rear cover plate 102, and a sleeve 103 is arranged at the center axis position, and the front end of the front cover plate 104 is integrally formed with a water-locking blade cover plate 105, so that the impeller blade 101 is stably placed between the rear cover plate 102 and the front cover plate 104 to form a stable The impeller is driven to rotate smoothly in the pump body when the pump body is running, so as to complete the extraction and lifting of brine and transport the brine to the use position. At the same time, the entire impeller is stably installed on the pump shaft by using the provided shaft sleeve 103, so as to ensure that the pump body drives the impeller to rotate stably and smoothly, improve the convenience of impeller installation, and quickly complete the installation of the impeller. The front end of the water-locking blade cover plate 105 is provided with a water-locking blade 106, which is convenient for forming a stable water-locking component at the lower part of the impeller, which is equivalent to installing a water-locking blade 106 on the front cover plate of the impeller. A sealing impeller is installed to seal the liquid in the pump body during the rotation of the impeller, firmly lock the liquid in the pump body, and 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 12-24 pieces. The water-locking blades 106 and the impeller share a suction port. The outer diameter of the water-locking blades 106 is slightly larger than that of the impeller, normally 1.02-1.05 times the outer diameter of the impeller. Brine enters the water-locking blades 106 from the suction port and enters the pump cavity under the action of centrifugal force. The water produced by the water-locking blades 106 The resulting head is 1.02-1.04 times that of the impeller, the flow rate delivered by the water-locking blades 106 is about 2%-5% of that of the impeller, and the shaft power consumed by the water-locking blades 106 is about 2%-5% of that of the impeller. The installation of the water-locking blades 106 can effectively reduce the internal leakage of the pump body, and the comprehensive efficiency of the pump body is about 1%-2% higher than that of the original impeller. In normal brine transportation operations, it is equivalent to connecting a semi-open impeller in series at the bottom of the impeller, which simultaneously participates in the brine transportation operation and improves the pump body's brine lifting performance.

[0020] When performing the fresh water flushing and desalination operation, under the action of gravity and pressure, the high-pressure fresh water injected into the pump casing will flow from the outer circle of the water locking blade 106 into the water locking blade along the mating clearance between the outer diameter of the back plate of the water locking blade 106 and the inner diameter of the guide ring. The fresh water entering the water locking blade 106 generates a certain pressure due to the centrifugal force of the blade rotation and reaches pressure balance with the fresh water passing through the mating clearance at the outer circle of the water locking blade 106. The high-energy liquid at the outer circle of the water locking blade 106 is thrown out of the guide ring by the water locking blade 106 under the action of centrifugal force and enters the pump casing again, thus forming a kind of microcirculation. Fresh water continuously enters the water locking blade 106 from the pump casing and is continuously thrown into the pump casing by the water locking blade 106. This cycle repeats, and the high-pressure fresh water in the pump casing can never form a leak at the water locking blade 106, firmly locking the fresh water in the pump chamber. The fresh water entering the pump casing can only flow along the outlet pipe towards the pipe outlet under the action of the kinetic energy generated by the impeller. The flowing fresh water continuously flushes and dissolves the pump chamber and the inner wall of the pipe, thereby achieving the purpose of rapid desalination, effectively preventing fresh water leakage, saving fresh water resources, and ensuring the smooth progress of the fresh water flushing and desalination operation.

[0021] As Figure 2 shown, in some embodiments, the water locking blade 106 is an arc-shaped blade. The arc-shaped blades are arranged in an annular array on one side of the integrally provided water locking blade cover plate 105, and the water locking blade cover plate 105 is integrally provided on the front cover plate 104. The front cover plate 104 and the water locking blade cover plate 105 are used to stably arrange the water locking blade 106 under the impeller, ensuring that it can rotate in the pump chamber along with the impeller during the operation of the impeller, sealing and locking the brine, effectively reducing the internal leakage of the pump body, and improving the conveying efficiency of the brine lift pump;

[0022] The arc-shaped blade has the same bending direction and rotation direction as the impeller blade 101. An arc-shaped flow guide groove is formed between adjacent two arc-shaped blades. The arc-shaped flow guide grooves are evenly distributed under the impeller body 1, which is equivalent to installing a sealed impeller on the front cover plate of the impeller. Under the action of gravity and pressure, the high-pressure brine in the pump casing will flow from the outer circle of the water locking blade 106 into the arc-shaped flow guide grooves between the arc-shaped blades inside the water locking blade 106 along the mating clearance between the outer diameter of the back plate of the water locking blade 106 and the inner diameter of the guide ring. The brine entering the water locking blade 106 generates a certain pressure due to the centrifugal force of the blade rotation and reaches pressure balance with the brine passing through the mating clearance at the outer circle of the water locking blade 106, achieving the purpose of locking water.

[0023] As Figure 1As shown, in some embodiments, a shaft sleeve 103 provided at the central axis portion of the rear cover plate 102 is provided with a shaft hole for assembling and connecting with the pump shaft. A keyway is provided on the inner wall of the shaft hole, which facilitates the stable and smooth installation of the impeller onto the pump shaft. The provided keyway facilitates the formation of a space for placing a key in cooperation with the keyway at the corresponding position on the pump shaft. The impeller and the pump shaft are installed and fixed by a key and a nut, which improves the stability of the impeller installed on the output shaft and drives the impeller to rotate smoothly in the pump body during the operation of the pump body.

[0024] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A brine lift pump impeller with arc-shaped water-locking blades, comprising an impeller body (1) drivingly connected to a pump shaft, characterized in that: The impeller blades (101) of the impeller body (1) are distributed in a ring array, a shaft sleeve (103) is arranged at the center axis position of a rear cover plate (102) integrally formed at the rear end of the impeller blades (101), a water-locking blade cover plate (105) is arranged at the front end of a front cover plate (104) integrally formed at the front end, and a water-locking blade (106) is arranged at the front end of the water-locking blade cover plate (105).

2. The brine lift pump impeller with arc-shaped water-locking blades according to claim 1 is characterized in that: The water-locking blades (106) are arc-shaped blades, which are distributed in a ring array on one side of an integrally arranged water-locking blade cover plate (105), and the water-locking blade cover plate (105) is integrally arranged on the front cover plate (104).

3. The brine lift pump impeller with arc-shaped water-locking blades according to claim 2 is characterized in that: The curved blades of the water-locking blades (106) have the same bending direction and the same rotation direction as the impeller blades (101), and an arc-shaped guide groove is formed between two adjacent arc-shaped blades, and the arc-shaped guide grooves are evenly distributed in the lower part of the impeller body (1).

4. The brine lift pump impeller with arc-shaped water-locking blades according to claim 1 is characterized in that: An axial hole for assembly and connection 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.

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