A down-feeding and side-discharging anti-blocking fresh water desalting brine conveying pump

Abstract

The application discloses a down-inlet side-outlet type anti-blocking fresh water desalination brine conveying pump and relates to the technical field of fluid conveying equipment, which is suitable for lithium extraction from salt lakes, high-crystallization brine conveying in chemical industry and ore slurry conveying conditions. The pump comprises a pump body support, a pump body, a motor connecting seat and a motor. The pump body is fixedly installed on the upper end of the pump body support and is peripherally detachably assembled with a pump barrel. The motor is fixed on the top of the motor connecting seat, and the output end of the motor is drivingly connected with a vertically arranged pump shaft through a motor coupling. According to the application, intermittent partition flushing is used to replace all-weather continuous water flushing, and the water saving rate reaches more than 90%. The friction loss is eliminated by the non-contact sealing pair impeller, zero leakage and maintenance-free are realized, the three cavities are matched with the annular liquid storage structure, the permanent self-suction effect is achieved by one-time water injection, the down-inlet side-outlet flow channel can prevent crystallization blockage and reduce hydraulic loss, the flow channel is optimized, the pump efficiency is improved by more than 10%, and the pump is suitable for water shortage salt lakes and unattended working conditions.

Description

Technical Field

[0001] This invention relates to the field of fluid transport equipment technology, and in particular to a pumping device suitable for transporting highly crystalline and highly corrosive media, specifically a bottom-inlet, side-outlet anti-clogging freshwater desalination brine transport pump. Background Technology

[0002] In the fields of lithium extraction from salt lakes, chemical brine and mineral slurry transportation, the transported medium usually contains a large amount of easily crystallizing salt and fine solid particles, which are very easy to form salt and scale in the pump body and cause blockage. This places high demands on the anti-clogging, sealing and continuous operation performance of the transport pump.

[0003] Currently, traditional brine transfer pumps have many shortcomings in practical applications: existing equipment mostly uses continuous freshwater flushing to prevent salt formation, resulting in high freshwater consumption and extremely high operating costs in water-scarce salt lake conditions in western China; traditional packing or mechanical seals wear out quickly and are prone to leakage in high-salt, particulate media, requiring frequent shutdowns for replacement, leading to high maintenance costs and poor continuity. Furthermore, conventional pumps lack a sealed liquid storage structure, allowing the medium inside the chamber to easily flow back and be lost after shutdown, requiring manual water replenishment or the addition of complex replenishment devices each time the pump is started, which cannot meet the needs of barge operations and unattended continuous operation. In addition, traditional pumps have high flow resistance, severe internal backflow, low conveying efficiency, and lack a zoned, fixed-point desalination structure, making it easy for salt scale to accumulate, causing impeller jamming and flow channel blockage, resulting in poor equipment stability and difficulty in adapting to the current intelligent and continuous brine conveying production requirements. Summary of the Invention

[0004] The purpose of this invention is to overcome the technical defects of existing brine transfer pumps, such as high freshwater consumption, poor sealing reliability, easy media leakage, need for repeated liquid filling during equipment start-up and shutdown, easy salt accumulation and blockage of the pump body, and low operating efficiency. It provides a bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump that can achieve water-saving desalination, long-term sealing and maintenance-free operation, permanent self-priming, anti-clogging, high-efficiency and continuous operation. It is suitable for long-term unattended operation of high-salt and easily crystallizing media such as lithium extraction from salt lakes, chemical brine and mineral slurry transportation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump, comprising a support and power assembly, a pumping assembly, a cavity structure, a desalination and flushing system, an auxiliary valve system, and an overflow and connection structure.

[0006] The support and power components include a pump body bracket, a pump body, and a motor. The pump body is fixedly mounted on the upper end of the pump body bracket, and the motor is rigidly connected to the pump body via a motor connector, resulting in strong overall structural stability. The pumping component includes a vertically arranged pump shaft. The upper end of the pump shaft is connected to the motor output end via a motor coupling, and the lower end of the pump shaft extends through the pump body to the bottom of the pump body. A working impeller is locked and fixed thereto by a working impeller nut. The pumping operation is achieved by the motor driving the impeller to rotate.

[0007] The cavity structure includes a pump barrel that can be detachably assembled around the pump body. The internal cavity of the pump body is divided into a suction chamber, a liquid storage chamber, a gas-liquid separation chamber and a sealing chamber from bottom to top. The multi-stage cavity structure has a clear division of labor. The pump body has a pump inlet at the bottom facing the suction chamber and a pump outlet at the middle of the pump body, forming a medium flow path of bottom inlet and side outlet, which effectively optimizes the medium delivery channel.

[0008] The desalination and flushing system includes two sets of independent freshwater desalination electric flushing valves. The first set of freshwater desalination electric flushing valves is connected to the sealed cavity, and the second set of freshwater desalination electric flushing valves is connected to the storage chamber and the suction chamber respectively through the freshwater desalination device in the pump chamber. Both sets of flushing valves adopt an electrically controlled intermittent opening and closing structure, which can be started and stopped independently by an external control system at different times, so as to realize fixed-point and zoned pulse desalination flushing inside the pump body.

[0009] The auxiliary valve system includes an electric exhaust valve, an electric vent valve, and a water supply valve. The electric exhaust valve is mounted on the top of the pump body and connected to the gas-liquid separation chamber, used to discharge accumulated gas in the chamber. The electric vent valve is mounted on the side of the pump cover and penetrates the inner cavity of the pump body, used to drain residual media during equipment maintenance. The water supply valve is detachably mounted on the side wall of the pump body and on the same side as the pump outlet, and its pipeline is connected to the liquid storage chamber, used to add priming water when the equipment is first self-primed.

[0010] The overflow and connection structure is a vertically arranged overflow pipe. The lower end of the overflow pipe is connected to the liquid storage chamber, and the upper end is connected to the gas-liquid separation chamber, which can realize the cross-cavity transportation of gas-liquid mixed media and the circulation of gas-liquid separation.

[0011] Furthermore, a sealing wheel and a sealing assembly desalination device are sequentially mounted on the pump shaft above the working impeller. The sealing assembly desalination device is housed inside the sealing cavity. The sealing wheel is axially locked to the pump shaft by the sealing wheel nut and rotates synchronously with the pump shaft. The sealing assembly desalination device adopts a multi-stage labyrinth and centrifugal composite sealing structure. The two work together to form a non-contact dynamic sealing impeller, which greatly improves the sealing performance of the pump body.

[0012] Furthermore, the pump barrel and pump body together form an annular liquid storage chamber, which can stably retain the medium.

[0013] Furthermore, the pump body bracket is fixedly installed by anchor bolts, and the motor connector is rigidly connected to the pump body and the motor flange respectively, forming a stable assembly reference frame for the whole machine.

[0014] Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: 1. Significant water-saving effect and low operating cost. This invention features two sets of independent electrically controlled intermittent freshwater desalination flushing structures, which perform targeted, zoned, and pulse-type desalination flushing on the sealing chamber, suction chamber, and storage chamber, respectively. This eliminates the water-consuming mode of traditional continuous flushing, significantly reducing freshwater consumption and achieving a water-saving rate of over 90%. It is particularly suitable for water-scarce salt lake conditions in western China, effectively reducing equipment operation and water resource consumption costs.

[0015] 2. Excellent sealing performance, maintenance-free and zero leakage. This invention adopts a sealing wheel combined with a multi-stage labyrinth centrifugal composite non-contact dynamic sealing structure to replace traditional easily worn packing seals and mechanical seals. There is no frictional loss during operation, which can achieve long-term stable sealing and no media leakage. There is no need to frequently stop to replace sealing parts, which significantly reduces equipment operation and maintenance costs and downtime failure rate.

[0016] 3. Possesses permanent self-priming capability and strong adaptability to operating conditions. This invention utilizes a multi-stage cavity structure consisting of a suction chamber, a liquid storage chamber, and a gas-liquid separation chamber, combined with a pump tank surrounding the liquid storage structure. Combined with an overflow pipe gas-liquid separation circulation design, the equipment can retain the medium within the cavity for an extended period after initial water replenishment, achieving permanent self-priming with a single water injection. This eliminates the problem of medium backflow during shutdown, eliminating the need for additional liquid replenishment devices and meeting the requirements for barge operations and unattended continuous start-stop conditions.

[0017] 4. Excellent anti-clogging performance and high conveying efficiency. This invention adopts a dual-path zoned fixed-point desalination and flushing mechanism, which can promptly dissolve and flush away nascent salt crystals inside the pump, preventing scale buildup, impeller jamming, and flow channel blockage from the source. At the same time, the optimized flow channel structure with bottom inlet and side outlet effectively reduces hydraulic resistance and internal backflow loss, improving the overall conveying efficiency by more than 10%. The equipment operates more stably and is more energy-efficient, making it suitable for the continuous intelligent conveying production needs of high-salt and easily crystallizing media. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a front view structural diagram of the bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump of the present invention; Figure 2 This is a partially enlarged structural view of the working impeller of the bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump of the present invention; Figure 3 This is a partially enlarged structural view of the pump body of the bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump of the present invention; Figure 4 This is a partially enlarged structural diagram of the electric flushing valve for the bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump of the present invention; Figure 5 This is a front view of the bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump of the present invention. Figure 6 This is a right-side structural view of the bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump of the present invention; Figure 7 This is a schematic diagram of the water flow direction of the bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump of the present invention.

[0019] Legend: 1. Pump body support; 2. Electric exhaust valve; 3. Pump body; 4. Electric vent valve; 5. Working impeller nut; 6. Working impeller; 7. Pump cover; 8. Sealing wheel nut; 9. Sealing wheel; 10. Sealing assembly for freshwater desalination; 11. Overflow pipe; 12. Pump shaft; 13. Motor coupling; 14. Motor; 15. Motor connecting seat; 16. Sealing wheel cover plate; 17. Sealing cavity; 18. Freshwater desalination electric flushing valve one; 19. Water supply valve; 20. Pump outlet; 21. Freshwater desalination electric flushing valve two; 22. Pump inlet; 23. Pump cavity freshwater desalination device; 24. Anchor bolts; 25. Pump barrel; 26. Suction chamber; 27. Liquid storage chamber; 28. Gas-liquid separation chamber. Detailed Implementation

[0020] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0021] Reference Figure 1-7 This invention discloses a bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump, the main structure of which includes a pump body support 1, a pump body 3, a motor connection seat 15, and a motor 14. The pump body 3 is fixedly mounted on the upper end of the pump body support 1, and a pump bucket 25 is detachably assembled around the pump body 3 via flange bolts, facilitating later cleaning and maintenance.

[0022] The motor 14 is fixed on the top of the motor connector 15. The output end of the motor 14 is connected to the vertically arranged pump shaft 12 via the motor coupling 13. The lower end of the pump shaft 12 is fitted with a working impeller 6 by locking it with the working impeller nut 5.

[0023] Reference Figure 1 , Figure 4To address the issues of gas trapping caused by the inability to expel gas from the pump chamber in traditional pumps, and the lack of a dedicated chamber in traditional pumps to retain media during shutdowns, leading to frequent water replenishment during start-up and shutdown, the internal cavity structure design of the pump body 3 is particularly crucial. For example... Figure 1 As shown, the inner cavity of the pump body 3 is divided into a suction chamber 26, a liquid storage chamber 27, a gas-liquid separation chamber 28, and a sealing chamber 17 from bottom to top. A pump inlet 22 is located on the bottom side (bottommost end) of the pump body 3, and a pump outlet 20 is located on the side center, forming a bottom-in, side-out medium flow path. The medium enters the suction chamber 26 from the bottom pump inlet 22, is pressurized by the working impeller 6, and is discharged from the side pump outlet 20.

[0024] Before starting the pump for the first time, open the water supply valve 19 to add priming water to the liquid storage chamber 27. When the working impeller 6 is running, the air in the suction pipe mixes with the liquid in the storage chamber to form a gas-liquid mixture. This mixture is sent to the gas-liquid separation chamber 28 through the overflow pipe 11 to achieve gas-liquid separation.

[0025] The separated gas is discharged through the electric exhaust valve 2 at the top, while the liquid falls back into the storage chamber 27. This cycle of evacuation creates negative pressure, completing the self-priming process. After shutdown, the liquid in the chamber does not flow out, achieving permanent self-priming with a single water addition.

[0026] Reference Figure 1 Considering the problems of traditional shaft seals being prone to wear and leakage, salt crystal accumulation causing seal jamming, and lack of fixed-point flushing structure, a sealing wheel 9 and a sealing assembly desalination device 10 are sequentially mounted on the pump shaft 12 above the working impeller 6. The sealing cavity 17 houses the sealing assembly desalination device 10. Two sets of independent electric desalination flushing valves are connected to the outside of the pump body 3, which respectively connect the sealing cavity 17 and the internal cavity of the pump body 3. The pump body 3 is also equipped with an electric exhaust valve 2, an electric venting valve 4, and a water supply valve 19. The overflow pipe 11 connects the liquid storage chamber 27 and the gas-liquid separation chamber 28. Electric vent valve 4 is a special valve for maintenance and venting; a DN50mm specification can be selected for this device. Water supply valve 19 is a special valve for initial water filling of the liquid storage chamber; a DN50mm specification can be selected for this device. The sealing assembly freshwater desalination device 10 rotates with the main shaft pump shaft 12 to achieve dynamic leakage prevention, and the multi-way valves realize water replenishment, air venting and fixed-point flushing operations respectively; it can not only protect the shaft end from leakage, but also connect to the external water circuit to dissolve the initial salt scale in advance. Reference Figure 1 Considering the high frictional loss and frequent replacement of parts required by traditional packing and mechanical seals, resulting in high maintenance costs, the sealing wheel 9 is axially locked onto the pump shaft 12 by the sealing wheel nut 8 and rotates synchronously with the pump shaft 12. The sealing chamber 17 port is detachably sealed with the sealing wheel cover plate 16. The sealing assembly freshwater desalination device 10 is a multi-stage labyrinth and centrifugal composite sealing structure. The sealing wheel 9 and the sealing assembly freshwater desalination device 10 constitute a non-contact dynamic sealing impeller. The high-speed rotation of the sealing wheel 9 generates centrifugal high pressure, which, combined with labyrinth throttling, forms a contactless fluid sealing barrier; completely eliminating packing or mechanical seals, achieving long-term leak-free and maintenance-free operation; Reference Figure 4 To address the problems of traditional pumps, such as scale buildup, high cost of continuous desalination throughout the day, high water consumption, and inconvenience in automation, two independent electric flushing valves for freshwater desalination are connected to the pump body 3: electric flushing valve 18 and electric flushing valve 21. Electric flushing valve 18 is connected to the sealed chamber 17, while electric flushing valve 21 connects the storage chamber 27 and the suction chamber 26 via the pump chamber's freshwater desalination device 23. Both are fixed-point desalination control valves; the DN32mm specification can be used in this device, and an electrically controlled intermittent opening and closing structure is adopted, with the external control system starting and stopping at set time intervals.

[0027] The control system uses two valves that start and stop at different times to intermittently introduce fresh water into the sealed chamber 17 and the chamber where the working impeller 6 is located to dissolve the salt scale. This fixed-point and zoned water injection strategy abandons the continuous flushing mode and only requires a small amount of fresh water to dissolve the initial salt scale online, reducing the fresh water consumption by more than 90%, which is suitable for the working conditions of water-scarce salt lakes in western China.

[0028] Reference Figure 1 , Figure 4 Considering that traditional pumps do not have a dedicated water injection interface, the initial self-priming water filling is cumbersome, and the storage chamber cannot be conveniently replenished with water, the water outlet pipe of the water supply valve 19 is connected to the storage chamber 27. The water supply valve 19 can be detachably installed on the side wall of the pump body 3 on the same side as the pump outlet 20 for initial self-priming water filling into the storage chamber 27. Opening the water supply valve 19 allows for the directional injection of water into the liquid storage chamber 27, completing the self-priming preparation liquid storage; quickly completing the initial liquid filling, ensuring that subsequent equipment can permanently self-prime without repeated water priming. Reference Figure 1 , Figure 3 , Figure 4 Considering the problem that gas can easily accumulate in the pump, causing air binding and cavitation, and the inability to quickly drain residual liquid during maintenance, the electric exhaust valve 2 is connected to the top of the gas-liquid separation chamber 28, and the electric vent valve 4 is detachably mounted on the side of the pump cover 7 and penetrates the inner cavity of the pump body 3. The electric exhaust valve 2 is used to discharge the gas accumulated in the gas-liquid separation chamber 28, and the electric vent valve 4 is used to drain the medium in the pump during maintenance. Electric exhaust valve 2 promptly discharges accumulated gas from gas-liquid separation chamber 28, and electric vent valve 4 opens the pump body 3 cavity during maintenance to discharge residual brine; thus avoiding gas binding faults and facilitating equipment shutdown for maintenance and venting. Reference Figure 1The pump barrel 25 and the pump body 3 together form an annular cavity for the liquid storage chamber 27. The overflow pipe 11 is arranged vertically, with the lower end of the overflow pipe 11 connected to the liquid storage chamber 27 and the upper end connected to the gas-liquid separation chamber 28, so as to realize the cross-cavity transport of gas-liquid mixed medium. Reference Figure 1 The pump inlet 22 is located at the bottom of the pump body 3 and faces the suction chamber 26. The pump outlet 20 is horizontally arranged in the middle of the pump body 3, forming a bottom-inlet and side-outlet medium flow path. Reference Figure 1 An electric vent valve 4 is installed on the side of the pump cover 7. During maintenance, it opens the pump body 3 cavity to discharge residual brine, avoiding air binding failure and facilitating equipment shutdown and maintenance. The pump body bracket 1 is fixed to the installation foundation by anchor bolts 24. Anchor bolts 24 are the fasteners for fixing the whole machine to the ground. In this device, 4-Φ24 specifications can be selected. The motor connection seat 15 is rigidly connected to the flanges of the pump body 3 and the motor 14, forming a stable fixed assembly reference frame for the whole machine.

[0029] In summary, the substantial features and significant advancements of this invention compared to the prior art are as follows: This pump is equipped with two electrically controlled intermittent flushing valves (freshwater desalination electric flushing valve 18 and freshwater desalination electric flushing valve 21), which replace continuous flushing around the clock with dual-path zoned fixed-point water injection flushing, reducing freshwater consumption by more than 90%. It is perfectly adapted to the water-scarce salt lake conditions in western China and solves the technical problem of "large-scale waste of freshwater resources" in the background technology. The sealing wheel 9 and the multi-stage labyrinth seal assembly freshwater desalination device 10 form a centrifugal composite non-contact sealing impeller, eliminating conventional packing and mechanical seals, thus eliminating friction power consumption and wear sources. Combined with the intermittent rinsing of the sealing cavity by the freshwater desalination electric flushing valve 18, it effectively prevents the adhesion and solidification of salt crystals at the sealing interface, thereby achieving the expected effect of "long-term leak-free and maintenance-free", significantly reducing maintenance costs. This pump relies on a three-chamber structure (suction chamber 26, liquid storage chamber 27, and gas-liquid separation chamber 28) combined with a pump casing 25 enclosing the liquid storage structure and an overflow pipe 11 to achieve a gas-liquid reflux mechanism. After initial startup, the liquid storage chamber always maintains a sufficient amount of priming liquid. Even under tilting and shutdown conditions, no siphon backflow occurs within the chambers, and vacuum self-priming can be established within 3 seconds without water replenishment upon restart. This proves the feasibility of "one-time water filling for permanent self-priming," completely solving the pain point of traditional pumps requiring repeated priming. Dual-path zoned flushing promptly dissolves nascent salt crystals, effectively preventing pump body 3 blockage. The bottom pump inlet 22 directly connects to the suction chamber 26, and the side pump outlet 20 is tangentially arranged, optimizing the pre-swirl conditions of the impeller 6 inlet, improving flow channel smoothness, and the composite sealing structure reduces internal backflow leakage and eddy current losses. Under the same head and flow conditions, the hydraulic efficiency of this invention is 10.2% higher than that of traditional axial inlet / outlet pumps, demonstrating significant energy-saving effects.

[0030] In summary, this invention, through the synergistic effect of "structural innovation (three-chamber + annular liquid storage) + control innovation (dual-path intermittent flushing) + material / mechanism innovation (non-contact sealing)," not only solves individual technical problems but also generates a synergistic effect of "1+1>2": water conservation and emission reduction lower operating costs, permanent self-priming improves operational continuity, non-contact sealing reduces maintenance frequency, and high efficiency lowers energy consumption. These logically verified technical effects fully demonstrate that this invention possesses outstanding substantive features and significant progress.

[0031] Working principle: The brine transfer pump is driven by motor 14 through motor coupling 13 to drive pump shaft 12 and working impeller 6 to rotate synchronously. Brine enters suction chamber 26 through bottom pump inlet 22, and is pressurized under the centrifugal action of impeller and then sent out from side pump outlet 20. Before the pump is started for the first time, water is injected into the annular storage chamber 27 formed by the pump barrel 25 and the pump body 3 through the water supply valve 19. The water injection volume is only 60% of the pump body volume. When the working impeller 6 is running, the air in the suction pipe mixes with the stored liquid to form a gas-liquid mixture. The mixture is sent to the gas-liquid separation chamber 28 through the overflow pipe 11 to achieve gas-liquid separation. The gas is discharged by the electric exhaust valve 2, and the liquid falls back into the storage chamber 27. The circulation and pumping create a negative pressure to complete self-priming. After the machine stops, the liquid in the chamber does not flow out, achieving permanent self-priming with a single water addition. The sealing wheel 9 rotates at high speed with the pump shaft 12 to generate centrifugal high pressure, which, together with the multi-stage labyrinth structure of the sealing assembly, forms a non-contact composite seal to prevent brine from leaking inward. During operation, the electric flushing valve 18 and the electric flushing valve 21 for desalination are opened and closed intermittently by electric control, respectively introducing fresh water into the sealing chamber 17, the suction chamber 26 and the storage chamber 27 at fixed points to dissolve the initial salt scale online and prevent the chamber from being blocked. During equipment maintenance, the electric vent valve 4 can be opened to drain the residual medium inside the pump body 3. Relying on the optimized flow channel and composite seal of bottom inlet and side outlet, the hydraulic backflow loss is reduced, saving more than 90% of water while improving the overall conveying efficiency by more than 10%.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump, characterized in that, The system includes a pump body support (1), a pump body (3), a motor connector (15), a motor (14), a sealing wheel (9), a sealing assembly, a freshwater desalination device (10), a freshwater desalination system, and an auxiliary valve system. The pump body (3) is fixedly installed on the upper end of the pump body support (1), and a pump barrel (25) is detachably mounted on the outside of the pump body (3). The motor (14) is fixedly installed on the top of the motor connector (15), and the output end of the motor (14) is connected to the vertically arranged pump shaft (12) through a motor coupling (13). The lower end of the pump shaft (12) passes through the pump body (3) and is locked with a working impeller (6) by a working impeller nut (5). The pump body (3) is divided into a suction chamber (26), a liquid storage chamber (27), a gas-liquid separation chamber (28), and a sealing chamber (17) from bottom to top. The pump body (3) has a pump inlet (22) at the bottom and a pump outlet (20) on the side. The sealing wheel (9) and the sealing assembly desalination device (10) are assembled from top to bottom on the pump shaft (12) and located above the working impeller (6). The sealing chamber (17) is used to accommodate the sealing assembly desalination device (10). The freshwater desalination system includes two independently set freshwater desalination electric flushing valves, namely freshwater desalination electric flushing valve one (18) and freshwater desalination electric flushing valve two (21). The freshwater desalination electric flushing valve one (18) is connected to the sealing chamber (17), and the freshwater desalination electric flushing valve two (21) is connected to the storage chamber (27) and the suction chamber (26) respectively through the pump chamber freshwater desalination device (23). The auxiliary valve system includes an electric exhaust valve (2), an electric vent valve (4), a water supply valve (19) assembled on the pump body (3), and a vertically arranged overflow pipe (11). The lower end of the overflow pipe (11) is connected to the liquid storage chamber (27), and the upper end is connected to the gas-liquid separation chamber (28).

2. The bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump according to claim 1, characterized in that, The pump body (3) is externally connected to two sets of independent freshwater desalination electric flushing valves. The two sets of freshwater desalination electric flushing valves are respectively connected to the sealing cavity (17) and the internal cavity of the pump body (3). The pump body (3) is integrated with an electric exhaust valve (2), an electric venting valve (4) and a water supply valve (19). The overflow pipe (11) is connected across the cavity to the liquid storage chamber (27) and the gas-liquid separation chamber (28).

3. The bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump according to claim 1, characterized in that, The sealing assembly freshwater desalination device (10) adopts a multi-stage labyrinth and centrifugal composite sealing structure; the sealing wheel (9) is axially locked to the pump shaft (12) by the sealing wheel nut (8) and can rotate synchronously with the pump shaft (12). The sealing wheel (9) and the sealing assembly freshwater desalination device (10) cooperate to form a non-contact dynamic sealing sub-impeller; the sealing cavity (17) port is detachably sealed with a sealing wheel cover plate (16).

4. The bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump according to claim 1, characterized in that, Both the first (18) and the second (21) electric flushing valves for desalination are electrically controlled intermittently opening and closing structures and are electrically connected to an external control module. The pipeline of the first (18) electric flushing valve is connected to the sealed cavity (17), and the second (21) electric flushing valve is connected to the storage chamber (27) and the suction chamber (26) through the pump chamber desalination device (23). The pump body is controlled to start and stop in a time-sharing manner by the external control module to realize fixed-point and zoned pulse flushing desalination inside the pump body.

5. The bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump according to claim 1, characterized in that, The pump barrel (25) and the pump body (3) together form an annular cavity for the liquid storage chamber (27); the overflow pipe (11) is arranged vertically, which can realize the cross-cavity transport of gas-liquid mixed medium between the liquid storage chamber (27) and the gas-liquid separation chamber (28); the water supply valve (19) is detachably installed on the side wall of the pump body (3) and on the same side as the pump outlet (20). The water outlet pipe of the water supply valve (19) is connected to the liquid storage chamber (27) and is used to add water to the liquid storage chamber (27) before the equipment's first self-priming operation.

6. The bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump according to claim 1, characterized in that, The electric exhaust valve (2) is connected to the top cavity of the gas-liquid separation chamber (28) and is used to discharge the gas accumulated inside the gas-liquid separation chamber (28); the electric vent valve (4) is detachably mounted on the side of the pump cover (7) and communicates with the inner cavity of the pump body (3) and is used to vent the residual medium inside the pump during equipment maintenance.

7. The bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump according to claim 1, characterized in that, The pump inlet (22) is located at the bottom of the pump body (3) and is positioned directly opposite the suction chamber (26). The pump outlet (20) is horizontally located in the middle of the pump body (3), forming a medium flow channel with bottom inlet and side outlet, which effectively reduces the hydraulic backflow loss of the medium.

8. The bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump according to claim 1, characterized in that, The pump body bracket (1) is fixedly installed on the mounting base by anchor bolts (24); the motor connecting seat (15) is rigidly connected to the pump body (3) and the motor (14) at both ends by flanges, forming a fixed assembly reference frame for the entire equipment.

9. The bottom-inlet, side-outlet anti-clogging freshwater desalination brine transfer pump according to claim 1, characterized in that, After the working impeller (6) is locked and fixed by the working impeller nut (5), a pump body inlet ring is installed between its outer edge and the pump body (3), which can effectively reduce the internal backflow of the medium and improve the overall operating efficiency of the equipment.

10. A method of operating a bottom-inlet, side-outlet, anti-clogging freshwater desalination brine transfer pump according to any one of claims 1-8, characterized in that, Includes the following steps: S1. Initial self-priming stage: Open the water supply valve (19) to add water to the liquid storage chamber (27), start the motor (14), and drive the pump shaft (12) and working impeller (6) to rotate through the motor coupling (13); the gas-liquid mixture in the suction chamber (26) is transported to the gas-liquid separation chamber (28) through the overflow pipe (11), the mixed gas is discharged by the electric exhaust valve (2), and the separated liquid falls back into the liquid storage chamber (27) for circulation until the pump inlet (22) forms a negative pressure and completes the self-priming operation; after the equipment stops, the medium is retained in the liquid storage chamber (27) to realize the permanent self-priming function of the equipment; S2, Desalination Operation Stage: During normal operation of the equipment, the external control module controls the opening and closing of the first (18) and the second (21) electric flushing valves for desalination in a time-sharing manner, respectively, to introduce fresh water into the sealing chamber (17), the suction chamber (26) and the storage chamber (27) at fixed points to dissolve and flush the initial salt crystals in the pump and prevent the accumulation of salt crystals from causing blockage. S3. Maintenance and venting stage: When the equipment is shut down for maintenance, open the electric vent valve (4) to completely vent the residual medium inside the pump body (3) and complete the equipment maintenance pretreatment operation.

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