Solid-liquid separation device and water pump applying same

Abstract

The utility model relates to a solid-liquid separation device and a water pump applying the solid-liquid separation device, which solve the problem that solid substances in liquid are difficult to solve in the prior art, and adopt the technical scheme that the solid-liquid separation device comprises a separation cylinder with a liquid inlet, and a flow guide liquid outlet cylinder which is arranged on the separation cylinder and is provided with a liquid outlet, the separation barrel and the flow guide liquid outlet barrel are matched to form a solid-liquid separation channel communicated with the liquid inlet and the liquid outlet, the solid-liquid separation channel at least comprises a liquid inlet channel, a separation channel and a liquid outlet channel, and the tail end of the liquid inlet channel is matched with the flow guide liquid outlet barrel. The device has the advantages that liquid entering the liquid inlet channel impacts the corresponding part of the flow guide liquid outlet cylinder to change the flowing direction and flow into the separation channel, the tail end of the separation channel is matched with the separation cylinder, sand in the liquid in the separation channel is deposited in the deposition structure of the corresponding part of the separation cylinder, and the liquid changes the flowing direction and flows into the liquid outlet channel; and the separated liquid flows out from the liquid outlet, so that solid-liquid separation is realized, the solid-liquid separation effect is good, and the efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of separation devices and water pumps, and in particular to a solid-liquid separation device and a water pump using the same. Background Technology

[0002] During the operation of a water pump, solid particles in the water (such as silt, pebbles, etc.) are easily sucked into the pump along with the water flow. The impeller rotates continuously, causing the water flow and solid particles to rotate. During the rotation, the solid particles are prone to generating shear force, which can damage the hydraulic components inside the pump (including the guide shell, impeller, and guide vanes).

[0003] Especially for well pumps, when fluid flows out of the impeller outlet, some solid particles tend to be diverted towards the bottom of the guide shell, forming a circulating flow. Because the impeller continuously supplies fluid, and this circulating flow is constant, the sidewalls of the guide shell are subjected to the prolonged action of this flow. The solid particles in the circulating flow impact and rub against the guide shell, causing wear and even breakage. Furthermore, under the influence of inertia and gravity, the solid particles in the circulating flow tend to accumulate and deposit at the bottom of the guide shell, further exacerbating wear or breakage. In addition, the diverted circulating flow is difficult to exit towards the pump outlet, affecting the pump's hydraulic efficiency. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems existing in the prior art by providing a solid-liquid separation device and a water pump using it. Through the solid-liquid separation channel, the liquid flow channel is transformed into a tortuous channel, forming a separation channel. In the separation channel, under the combined action of gravity and liquid flow, solid substances are easily deposited on the deposition structure at the corresponding part of the separation cylinder. After the solid substances in the liquid are deposited, they return to the liquid outlet channel, completing the solid-liquid separation action and achieving the purpose of solid-liquid separation.

[0005] The above-mentioned technical objective of this utility model is mainly achieved through the following technical solution: The first technical subject of this utility model is a solid-liquid separation device, characterized in that it includes a separation cylinder with an inlet, and a guide outlet cylinder with an outlet disposed on the separation cylinder. The separation cylinder and the guide outlet cylinder cooperate to form a solid-liquid separation channel connecting the inlet and the outlet. The solid-liquid separation channel includes at least an inlet channel, a separation channel, and an outlet channel. The end of the inlet channel cooperates with the guide outlet cylinder, so that the liquid entering the inlet channel impacts the corresponding part of the guide outlet cylinder and changes its flow direction to flow into the separation channel. The end of the separation channel cooperates with the separation cylinder, so that the sand in the liquid in the separation channel is deposited in the deposition structure on the separation cylinder, and the liquid changes its flow direction to flow into the outlet channel, and the separated liquid flows out from the outlet.

[0006] In this technical solution, the solid-liquid separation device has a tortuous solid-liquid separation channel that meanders back and forth, allowing the liquid to flow along the tortuous channel. The separation channel is the first reversal channel in the solid-liquid separation process, where the liquid flows against the inlet direction and tilts towards the outlet channel. In the separation channel, solid matter, under the combined action of gravity and liquid flow, easily deposits on the deposition structure at the corresponding part of the separation cylinder. After the solid matter in the liquid is deposited, it reverts back into the outlet channel, completing the solid-liquid separation action and achieving the purpose of solid-liquid separation.

[0007] As a further improvement and supplement to the above technical solution, the present invention adopts the following technical measures:

[0008] Preferably, the liquid guide cylinder includes a baffle ring and an inner guide ring that mates with the inner edge of the baffle ring. The separation cylinder has an outer guide ring that mates with the inner edge of the baffle ring. The outer guide ring is used to allow the liquid entering the inlet to flow smoothly into the inlet channel and to cause the liquid to impact the baffle ring. The inner guide ring is used to guide the liquid that is turned back due to the impact to flow into the separation channel. The separation channel gradually tilts towards the inlet end of the outlet channel to guide the turned-back liquid to flow towards the inlet end of the outlet channel.

[0009] Preferably, the axial length of the outer guide ring is less than the axial length of the inner guide ring, and the distance between the end of the inner guide ring facing away from the baffle ring and the separation channel is less than that of the rest, forming a constricted shape, which is used to stimulate the speed of liquid flow towards the deposition structure, which is beneficial to improving the liquid flow speed and improving the solid-liquid separation efficiency.

[0010] Preferably, the separation cylinder is also provided with a sand discharge port that communicates with the sedimentation structure, and the sedimentation structure gradually tilts downward toward the sand discharge port to allow the sediment in the sedimentation structure to be discharged from the separation cylinder.

[0011] Preferably, the separator is surrounded by a cylindrical body, and an induction wheel is installed inside the cylindrical body. The induction wheel is located below the separator and is used to increase the fluid velocity flowing into the inlet. When the solid-liquid separation device is installed on a pipeline, the corresponding part of the pipeline can form a cylindrical effect.

[0012] Preferably, the axle of the inducer wheel penetrates the deposition structure. A sand-blocking ring is provided at the point where the deposition structure mates with the axle of the inducer wheel. This sand-blocking ring is cylindrical or a cylindrical shape with a convex center. The convex center forms a splash-proof ring to prevent sediment deposited in the deposition structure from being splashed up by the impact of the returning liquid flow and continuing to flow into the outlet channel. A shaft hole is formed in the middle of the deposition structure. The sidewall of the shaft hole helps to axially position the axle of the inducer wheel, ensuring stable rotation of the inducer wheel.

[0013] Preferably, the inner wall of the sand-blocking ring is provided with at least one axially penetrating sand discharge channel to discharge sand that enters the gap between the sand-blocking ring and the wheel axle. This helps prevent sand entering the gap from jamming the wheel axle of the inducer wheel, and also helps reduce the wear caused by jammed sand on the deposition structure and the wheel axle of the inducer wheel.

[0014] Preferably, the separation cylinder has a small bottom and a large opening, the deposition structure is located at the bottom of the separation cylinder, and there are several liquid inlets, all of which are located on the side wall of the separation cylinder. The liquid inlets are located above the lower end of the inner guide ring on the liquid guide cylinder, the radius of the inscribed circle of the liquid inlet is R1, and the inner diameter of the lower end of the inner guide ring is R2, where R1 ≥ R2.

[0015] In this technical solution, after the liquid enters the inlet channel through the inlet, it is blocked by the baffle ring and then flows back smoothly into the separation channel (i.e., the first reflux). Since the separation channel is inclined from top to bottom towards the axis of the solid-liquid separation device, the liquid also flows inclined from top to bottom. The solid substances in the liquid are deposited in the deposition structure under the action of gravity. When the liquid is no longer restricted by the inner guide ring, it begins to flow back again at the lower end of the inner guide ring (i.e., the second reflux). At this time, it flows upward. While the liquid flows upward, the solid substances in the liquid continue to sink under the action of gravity and continue to separate. Therefore, the deposition structure corresponds to the lower part of the outlet channel and the inner guide ring, which is conducive to the accumulation of sediment (i.e., the deposited solid substances) for easy discharge. In order to further accumulate sediment, the lower part of the separation cylinder (i.e., the part located below the lower end of the inner guide ring) is often set as a frustum-shaped structure with a larger top and a smaller bottom, which facilitates the sediment to slide down along the inclined interior of the separation cylinder to the deposition structure.

[0016] In addition, a tortuous flow channel (with two reversals) is set in the separation cylinder, which increases the overall length of the flow channel, which is conducive to more thorough deposition of fixed substances. Moreover, the liquid inlet channel and the separation channel form a backflow and mixing effect, and combined with the effect of gravity, the heavier particles (such as silt) are deposited in the deposition structure, thereby reducing the content of particles entering the water inlet channel and realizing solid-liquid separation.

[0017] Preferably, starting from the inlet, the angle α between the inclined plane of the sidewall of the separator and the horizontal plane gradually increases; or starting from the inlet, the sidewall of the separator is cylindrical or flared, and the projections of the sidewall and the inlet on the same cross-section are staggered, i.e., they do not intersect. The separator has an attachment protrusion corresponding to the inlet, protruding towards the separation channel. This sidewall structure of the separator facilitates liquid entry into the inlet channel and, during the first return flow, allows for mixing with the liquid in the inlet channel without affecting the return flow. This reduces the possibility of fluid inertia carrying material directly through the separation channel into the outlet channel, disrupting the inertial effect of the fluid and thus promoting solid deposition and improving deposition efficiency.

[0018] The technical solution of the second technical subject of this utility model is as follows: a water pump, including a pump body, an impeller assembly disposed in the pump body, and a motor assembly that drives the impeller assembly to work, characterized in that the aforementioned solid-liquid separation device is disposed between the motor assembly and the pump body, the liquid outlet cylinder is connected to the impeller assembly, the separation cylinder is connected to the motor assembly, and the rotating shaft on the impeller assembly passes through the solid-liquid separation device and is connected to the drive shaft on the motor assembly; or, a cylinder body disposed around the separation cylinder is connected to the motor assembly, the drive shaft on the motor assembly is connected to the lower end of the rotating shaft of an inducer wheel disposed in the cylinder body, and the upper end of the rotating shaft of the inducer wheel passes through the separation cylinder and the liquid outlet cylinder and is connected to the impeller assembly. In this technical solution, the solid-liquid separation device can exist as a module. When the water pump is applied to a specific environment, it is necessary to perform solid-liquid separation of the liquid beforehand to reduce the adverse effects of substances on the water pump. The solid-liquid separation device can be directly installed on the water pump (including existing water pumps), which increases the versatility of the water pump and allows the water pump to perform solid-liquid separation beforehand. The separated liquid then enters the water pump, reducing the damage caused by solid substances. Furthermore, when several water pumps equipped with solid-liquid separation devices are applied to liquid environments with limited solid content, the solid-liquid separation device can be removed, reducing the water pump size and increasing the water pump's adaptability to different environments.

[0019] The beneficial effects of this invention are as follows: 1. By using a solid-liquid separation channel, the liquid flow channel is transformed into a tortuous channel, forming a separation channel. In this channel, solid substances, under the combined action of gravity and liquid flow, easily deposit on the deposition structure at the corresponding part of the separation cylinder. After deposition, the solid substances in the liquid return to the outlet channel, completing the solid-liquid separation process and achieving the purpose of solid-liquid separation. 2. The solid-liquid separation device can be used as a module, employing pipelines for solid-liquid separation, or applied to water pumps (including existing water pumps), demonstrating strong applicability and wide application. When applied to water pumps, it helps reduce wear caused by solid substances in the liquid, extending the pump's service life and improving the purity of the pumped liquid, which is beneficial for subsequent liquid use. 3. The separator has an ingenious structure. Through the flow-blocking ring, it sequentially forms the first flow deflection. The outer and inner guide rings not only guide the liquid inflow and separation but also create mixed flow at the interface of these three rings. This reduces the inertial effect on solid materials, allowing them to settle under their own gravity, thus improving the sedimentation separation effect and efficiency. 4. The sand-blocking ring and sand-discharge channel protect the separator and inducer wheel, reducing the risk of sand and mud getting stuck and causing wear at their interface, thereby extending their service life. 5. The installation of the wall protrusion creates a wall effect, forming a constricted shape between the lower end of the inner guide ring and the side wall of the separation cylinder. This not only helps to increase the speed at which the liquid flows towards the deposition structure, but also helps the water flow to tend to flow along the lower side wall of the separation cylinder after passing the wall protrusion (i.e., the water flows inward at an angle before passing the wall protrusion, and may flow downward or even outward after passing the wall protrusion). This reduces the difficulty of solid matter converging in the middle and increases the difficulty of solid matter entering the water inlet channel upward, thereby improving the solid-liquid separation effect and efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a solid-liquid separation device involved in this utility model.

[0021] Figure 2 This is a cross-sectional schematic diagram of a separation cylinder structure involved in this utility model.

[0022] Figure 3 This is a schematic diagram of a separation cylinder with a sand discharge port, which is related to this utility model.

[0023] Figure 4 This is a utility model Figure 3 A schematic diagram of a cross-sectional structure.

[0024] Figure 5 Is Figure 3 A schematic diagram of a cross-sectional structure in which the sedimentary structure is tilted based on the above.

[0025] Figure 6 This is a cross-sectional structural diagram of a further improved sand-blocking vertical ring structure.

[0026] Figure 7 This is a cross-sectional view of a structure in which an attachment protrusion is set on the inner wall of the separator.

[0027] Figure 8 This is a schematic diagram of a solid-liquid separation device applied to a water pump.

[0028] In the diagram: 1. Separation cylinder; 2. Liquid inlet; 3. Liquid outlet; 4. Flow guide cylinder; 5. Liquid inlet channel; 6. Separation channel; 7. Liquid outlet channel; 8. Deposition structure; 9. Baffle ring; 10. Outer guide ring; 11. Inner guide ring; 12. Sand discharge port; 13. Inducer wheel; 14. Sand baffle ring; 15. Anti-splash protrusion; 16. Sand discharge channel; 17. Attached wall protrusion; 18. Pump body; 19. Impeller assembly; 20. Drive shaft; 21. Sand discharge pipe; 22. Sand discharge pipeline. Detailed Implementation

[0029] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0030] Example 1: As Figures 1-7 As shown, the technical solution of the first technical subject matter involved in this utility model is as follows:

[0031] A solid-liquid separation device includes a separation cylinder 1 with a liquid inlet 2 and a guide liquid outlet cylinder 4 with a liquid outlet 3 disposed on the separation cylinder 1.

[0032] The separation cylinder 1 and the liquid guide cylinder 4 cooperate to form a solid-liquid separation channel that connects the liquid inlet 2 and the liquid outlet 3. The solid-liquid separation channel includes at least a liquid inlet channel 5, a separation channel 6 and a liquid outlet channel 7.

[0033] The end of the liquid inlet channel 5 is engaged with the liquid outlet guide cylinder 4, so that the liquid entering the liquid inlet channel 5 impacts the corresponding part of the liquid outlet guide cylinder 4 and changes its flow direction to flow into the separation channel 6. The end of the separation channel 6 is engaged with the separation cylinder 1, so that the sand in the liquid in the separation channel 6 is deposited in the deposition structure 8 on the separation cylinder 1, and the liquid changes its flow direction to flow into the liquid outlet channel 7, and the separated liquid flows out from the liquid outlet 3.

[0034] In this technical solution, the solid-liquid separation device has a tortuous solid-liquid separation channel with back-and-forth reversals (in this embodiment, there are two reversals, but more than two reversals can also be used, which is also covered by this utility model), allowing the liquid to flow along the tortuous channel. Among them, the separation channel 6 is the first reversal channel of the solid-liquid separation channel, and the liquid in the separation channel 6 flows against the direction of water inlet and tilts towards the liquid outlet channel 7.

[0035] In the separation channel 6, solid matter is easily deposited on the deposition structure 8 at the corresponding part of the separation cylinder 1 under the combined action of gravity and liquid flow. After the solid matter in the liquid is deposited, it returns to the liquid outlet channel 7, completing the solid-liquid separation action and achieving the purpose of solid-liquid separation.

[0036] In this technical solution, the deposition structure 8 and the separation cylinder 1 are an integral structure. Of course, the deposition structure 8 and the separation cylinder 1 can also be separate structures. These technical means are all achievable by those skilled in the art, and therefore also fall within the scope of protection of this utility model. In addition, the deposition structure 8 can be an axially inclined structure with one end higher than the other, or it can be a structure that is approximately located on the same plane (i.e., the plane of the deposition structure 8 is approximately perpendicular to the axis).

[0037] The above technical solution will then be explained in detail:

[0038] In practical applications, the liquid guide cylinder 4 includes a baffle ring 9 and an inner guide ring 11 that mates with the inner edge of the baffle ring 9. The separation cylinder 1 has an outer guide ring 10 that mates with the inner edge of the baffle ring 9. The outer guide ring 10 is used to allow the liquid entering the inlet 2 to flow smoothly into the inlet channel 5 and to cause the liquid to impact the baffle ring 9. The inner guide ring 11 is used to guide the liquid that is turned back due to the impact to flow into the separation channel 6. The separation channel 6 gradually tilts towards the inlet end of the outlet channel 7 to guide the turned-back liquid to flow towards the inlet end of the outlet channel 7.

[0039] In this technical solution, the inlet 2 and the outer guide ring 10 work together to allow liquid to enter the inlet channel 5, while the baffle ring 9 and the inner guide ring 11 work together to guide the liquid back into the separation channel 6. Furthermore, the separation channel 6, with the upper part of the inner guide ring 11 and the outer guide ring 10 simultaneously forming an inlet and backflow separation mechanism, easily disrupts the liquid flow direction. This helps to disrupt the inertia of the liquid entering the separation channel 6, reduces the degree to which the liquid carries solid matter, prevents solid matter from tilting downwards with the liquid and then back into the outlet channel 7, reduces the influence of inertia on solid matter, and promotes the deposition of solid matter under gravity, thereby improving the solid-liquid separation effect and efficiency.

[0040] In practical applications, the axial length of the outer guide ring 10 is less than the axial length of the inner guide ring 11. The distance between the end of the inner guide ring 11 that is away from the baffle ring 9 and the separation channel 6 is less than that of the rest of the part, forming a constricted shape. This is used to stimulate the speed at which the liquid flows toward the deposition structure 8, which is beneficial to improving the liquid flow speed and improving the solid-liquid separation efficiency.

[0041] In practical applications, the outer guide ring 10 can be an independent component or a corresponding part of the wall on the upper part of the separation cylinder 1. The inner guide ring 11 can be an independent component or a corresponding part on the liquid outflow cylinder 4.

[0042] In practical applications, the separation cylinder 1 is also provided with a sand discharge port 12 that communicates with the sedimentation structure 8. The sedimentation structure 8 gradually tilts downward toward the sand discharge port 12 to allow the sediment in the sedimentation structure 8 to be discharged from the separation cylinder 1. This helps to prevent a large amount of sediment deposited in the sedimentation mechanism from being carried away by the liquid and entering the liquid outlet channel 7 again.

[0043] In this technical solution, in order to facilitate sand discharge, the sand discharge port 12 is extended outward through the extended sand discharge pipe 22. The sand discharge pipe 22 can be an independent component, or it can be a part of an integrated mechanism on the separation cylinder 1. It can also be a corresponding part on the cylinder body.

[0044] In practical applications, a cylinder body is provided around the separation cylinder 1, and an inducer wheel 13 is provided inside the cylinder body. The inducer wheel 13 is located below the separation cylinder 1 and is used to increase the fluid velocity flowing into the liquid inlet 2.

[0045] When a solid-liquid separation device is installed on a pipeline, the pipeline at the corresponding part can form a cylindrical effect. At this time, the cylindrical body can be removed to reduce material costs and disassembly and assembly costs.

[0046] In practical applications, the axle of the inducer wheel 13 passes through the deposition structure 8. A sand-blocking ring 14 is provided at the part of the deposition structure 8 that mates with the axle of the inducer wheel 13. The sand-blocking ring 14 is cylindrical or cylindrical with a convex center. The splash-proof ring 15 formed by the convex center is used to prevent the sediment deposited in the deposition structure 8 from being splashed by the impact of the reverse liquid flow and continuing to flow into the liquid outlet channel 7 with the liquid flow.

[0047] In this technical solution, a shaft hole is formed in the middle of the deposition structure 8. The sidewall of the shaft hole is beneficial for axial positioning of the axle of the inducer wheel 13, so that the inducer wheel 13 can rotate stably.

[0048] When the solid-liquid separation device uses pipelines, in order to increase the stability of the axle of the inducer wheel 13, a bearing seat can be added to support the lower end of the axle of the inducer wheel 13 (since the pipeline may be set horizontally, vertically, or inclined, and the water pump is often set with the motor at the bottom and the pump body 18 at the top, for ease of description, the direction of liquid outflow is upward and the direction of liquid inflow is downward). The bearing seat has a channel for liquid to pass through.

[0049] When the solid-liquid separation device is applied to a water pump, the upper end of the shaft of the inducer wheel 13 passes through the solid-liquid separation device and connects to the impeller shaft of the impeller assembly 19 inside the pump body 18. The lower end of the shaft of the inducer wheel 13 is connected to the drive shaft 20 on the motor assembly. In practical applications, an inlet section is often set between the pump body 18 and the motor assembly, and the connection between the shaft of the inducer wheel 13 and the drive shaft 20 on the motor assembly is located in the inlet section.

[0050] In practical applications, the inner wall of the sand-blocking ring 14 is provided with at least one axially penetrating sand discharge channel 16 to discharge sand that enters the gap between the sand-blocking ring 14 and the wheel axle.

[0051] In this technical solution, the sand discharge channel 16 helps to prevent sand entering the gap from jamming the axle of the inducer wheel 13, and also helps to reduce the wear caused by jammed sand on the sedimentation structure 8 and the axle of the inducer wheel 13.

[0052] In practical applications, the separation cylinder 1 has a small bottom and a large opening. The deposition structure 8 is located at the bottom of the separation cylinder 1. There are several liquid inlets 2, all of which are located on the side wall of the separation cylinder 1. The liquid inlets 2 are located above the lower end of the inner guide ring 11 on the guide outlet cylinder 4. The radius of the inscribed circle of the liquid inlet 2 is R1, and the inner diameter of the lower end of the inner guide ring 11 is R2, where R1 ≥ R2. In this embodiment, preferably, R1 ≥ 1.2R2.

[0053] In this technical solution, after the liquid enters the inlet channel 5 through the inlet 2, it is blocked by the baffle ring 9 and then flows back smoothly into the separation channel 6 (i.e., the first reflux). Since the separation channel 6 is inclined from top to bottom towards the axis of the solid-liquid separation device, the liquid also flows from top to bottom at an incline. The solid matter in the liquid is deposited in the deposition structure 8 under the action of gravity. When the liquid is no longer restricted by the inner guide ring 11, the liquid begins to reflux again at the lower end of the inner guide ring 11 (i.e., the second reflux). At this time, it flows upward. While the liquid flows upward, the solid matter in the liquid continues to sink under the action of gravity and continues to separate. Therefore, the deposition structure 8 corresponds to the lower part of the outlet channel 7 and the inner guide ring 11, which is conducive to the accumulation of sediment (i.e., the deposited solid matter) for easy discharge. In order to further accumulate sediment, the lower part of the separation cylinder 1 (i.e., the part located below the lower end of the inner guide ring 11) is often set as a frustum-shaped structure with a larger upper part and a smaller lower part, so that the sediment can slide down along the inclined interior of the separation cylinder 1 to the deposition structure 8.

[0054] In addition, a tortuous flow channel (with two reversals) is set in the separation cylinder 1, which increases the overall length of the flow channel, which is conducive to more thorough deposition of fixed substances. Moreover, the liquid inlet channel 5 and the separation channel 6 form a backflow and mixing effect, and combined with the effect of gravity, the heavier particles (such as silt) are deposited in the deposition structure 8, thereby reducing the content of particles entering the water inlet channel and realizing solid-liquid separation.

[0055] In practical applications, starting from the inlet 2 downwards, the angle α between the inclined surface of the side wall of the separation cylinder 1 and the horizontal plane gradually increases; or starting from the inlet 2 upwards, the side wall of the separation cylinder 1 is cylindrical or flared cylindrical, and starting from the inlet 2 downwards, the projections of the side wall of the separation cylinder 1 and the inlet 2 on the same cross-section are staggered, i.e., they do not intersect, and the part of the separation cylinder 1 corresponding to the inlet 2 has an attachment protrusion 17, which protrudes towards the separation channel 6.

[0056] In this technical solution, the side wall structure of the separation cylinder 1 is not only conducive to the liquid entering the inlet channel 5, but also conducive to the liquid forming a mixed flow with the liquid in the inlet channel 5 during the first return without affecting the return flow. This reduces the possibility that the fluid inertia will carry the material directly through the separation channel 6 and directly enter the outlet channel 7, which helps to disrupt the inertial effect of the fluid, thereby facilitating the deposition of solid materials and improving the deposition efficiency.

[0057] In this technical solution, the wall-attached protrusion 17 creates a wall-attached effect, forming a constricted shape between the lower end of the inner guide ring 11 and the side wall of the separation cylinder 1. This not only helps to increase the speed at which the liquid flows toward the deposition structure 8, but also helps to make the water flow tend to flow along the lower side wall of the separation cylinder 1 after passing the wall-attached protrusion 17 (i.e., the water flows inward at an angle before passing the wall-attached protrusion 17, and may flow downward or even outward after passing the wall-attached protrusion 17). This reduces the difficulty of solid matter converging in the middle and increasing the difficulty of solid matter entering the water inlet channel upward, thereby improving the solid-liquid separation effect and efficiency.

[0058] Example 2: As Figure 8 As shown, the technical solution of the second technical subject matter involved in this utility model is as follows:

[0059] A water pump includes a pump body 18, an impeller assembly 19 disposed within the pump body 18, and a motor assembly that drives the impeller assembly 19.

[0060] The difference between this technical solution and the prior art is that: the solid-liquid separation device described in Embodiment 1 is provided between the motor assembly and the pump body 18 (such as...). Figures 1-7 (as described above), the liquid outlet cylinder 4 is connected to the impeller assembly 19, the separation cylinder 1 is connected to the motor assembly, and the rotating shaft on the impeller assembly 19 passes through the solid-liquid separation device and is connected to the drive shaft 20 on the motor assembly; or, the outer periphery of the separation cylinder 1 is connected to the motor assembly, the drive shaft 20 on the motor assembly is connected to the lower end of the rotating shaft of the inducer wheel 13 provided inside the cylinder, and the upper end of the rotating shaft of the inducer wheel 13 passes through the separation cylinder 1 and the liquid outlet cylinder 4 and is connected to the impeller assembly 19.

[0061] In this technical solution, the solid-liquid separation device can exist as a module. When the water pump is used in a specific environment, it is necessary to separate the liquid into solid and liquid beforehand to reduce the adverse effects of substances on the water pump. The solid-liquid separation device can be directly installed on the water pump (including existing water pumps), which not only increases the versatility of the water pump, but also allows the water pump to perform solid-liquid separation after the solid-liquid separation device is added. The liquid after solid-liquid separation enters the water pump, reducing the damage caused by solid substances to the water pump.

[0062] Meanwhile, when some water pumps equipped with solid-liquid separation devices are used in liquid environments with limited solid content, the solid-liquid separation devices can be removed to reduce the volume of the water pump and increase its adaptability to different environments.

[0063] In this technical solution, in order to smoothly connect the sand discharge port 12 on the solid-liquid separation device to the outside of the pump body 18, a sand discharge pipe 21 is often provided on the pump body 18. The sand discharge pipe 21 is connected to the sand discharge port 12 (or sand discharge pipeline 22) to smoothly extend the sand discharge port 12 to the outside of the pump body 18.

[0064] In this technical solution, the shaft of the inducer wheel 13 can be the same shaft as the drive shaft 20 on the motor assembly or the rotating shaft on the impeller assembly 19.

[0065] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Various modifications and variations can be made to the above embodiments. Any modifications, equivalent substitutions, improvements, etc., 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 solid-liquid separation device, characterized in that... The system includes a separation cylinder (1) with an inlet (2) and a guide outlet cylinder (4) with an outlet (3) on the separation cylinder (1). The separation cylinder (1) and the guide outlet cylinder (4) cooperate to form a solid-liquid separation channel connecting the inlet (2) and the outlet (3). The solid-liquid separation channel includes at least an inlet channel (5), a separation channel (6), and an outlet channel (7). The end of the inlet channel (5) cooperates with the guide outlet cylinder (4) so ​​that the liquid entering the inlet channel (5) hits the corresponding part of the guide outlet cylinder (4) and changes its flow direction to flow into the separation channel (6). The end of the separation channel (6) cooperates with the separation cylinder (1) so that the sand in the liquid in the separation channel (6) is deposited in the deposition structure (8) of the corresponding part of the separation cylinder (1) and the liquid changes its flow direction to flow into the outlet channel (7), and the separated liquid flows out from the outlet (3).

2. The solid-liquid separation device according to claim 1, characterized in that... The liquid guide cylinder (4) includes a baffle ring (9) and an inner guide ring (11) that cooperates with the inner edge of the baffle ring (9). The separation cylinder (1) has an outer guide ring (10) that cooperates with the inner edge of the baffle ring (9). The outer guide ring (10) is used to allow the liquid entering the inlet (2) to flow smoothly into the inlet channel (5) and to cause the liquid to impact the baffle ring (9). The inner guide ring (11) is used to guide the liquid that is turned back due to the impact to flow into the separation channel (6). The separation channel (6) gradually tilts towards the inlet end of the outlet channel (7) to guide the liquid that is turned back to flow towards the inlet end of the outlet channel (7).

3. The solid-liquid separation device according to claim 2, characterized in that... The axial length of the outer guide ring (10) is less than the axial length of the inner guide ring (11). The distance between the end of the inner guide ring (11) that is away from the flow-blocking ring (9) and the separation channel (6) is less than that of the rest of the part, forming a constricted shape, which is used to stimulate the speed of the liquid flowing towards the deposition structure (8).

4. The solid-liquid separation device according to claim 1, 2, or 3, characterized in that... The separation cylinder (1) is also provided with a sand discharge port (12) that communicates with the sedimentation structure (8). The sedimentation structure (8) gradually tilts downward toward the sand discharge port (12) to allow the sediment in the sedimentation structure (8) to be discharged from the separation cylinder (1).

5. The solid-liquid separation device according to claim 1, 2, or 3, characterized in that... The outer periphery of the separation cylinder (1) is provided with a cylinder body, and an inducer wheel (13) is provided inside the cylinder body. The inducer wheel (13) is located below the separation cylinder (1) and is used to increase the fluid velocity flowing into the liquid inlet (2).

6. The solid-liquid separation device according to claim 5, characterized in that... The axle of the inducer wheel (13) passes through the deposition structure (8). A sand-blocking ring (14) is provided at the part of the deposition structure (8) that mates with the axle of the inducer wheel (13). The sand-blocking ring (14) is cylindrical or cylindrical with a convex center. The splash-proof ring (15) formed by the convex center is used to prevent the sediment deposited in the deposition structure (8) from being splashed by the impact of the reverse liquid flow and continuing to flow into the liquid outlet channel (7) with the liquid flow.

7. The solid-liquid separation device according to claim 6, characterized in that... The inner wall of the sand-blocking ring (14) is provided with at least one axially penetrating sand discharge channel (16) for discharging sand that enters the gap between the sand-blocking ring (14) and the wheel axle.

8. The solid-liquid separation device according to claim 1, 2, or 3, characterized in that... The separation cylinder (1) has a small bottom and a large opening. The deposition structure (8) is set at the bottom of the separation cylinder (1). There are several liquid inlets (2). All of the liquid inlets (2) are set on the side wall of the separation cylinder (1). The liquid inlet (2) is located above the lower end of the inner guide ring (11) on the liquid guide cylinder (4). The radius of the inner circle of the liquid inlet (2) is R1. The inner diameter of the lower end of the inner guide ring (11) is R2. R1≥R2.

9. The solid-liquid separation device according to claim 8, characterized in that... Starting from the inlet (2) downwards, the angle α between the inclined surface of the side wall of the separation cylinder (1) and the horizontal plane gradually increases; or starting from the inlet (2) upwards, the side wall of the separation cylinder (1) is cylindrical or flared cylindrical, and starting from the inlet (2) downwards, the projections of the side wall of the separation cylinder (1) and the inlet (2) on the same cross section are staggered, i.e., they do not intersect, and the part of the separation cylinder (1) corresponding to the inlet (2) has a wall-attached protrusion (17), which protrudes towards the separation channel (6).

10. A water pump, comprising a pump body (18), an impeller assembly (19) disposed within the pump body (18), and a motor assembly for driving the impeller assembly (19), characterized in that... A solid-liquid separation device according to any one of claims 1-9 is provided between the motor assembly and the pump body (18), the liquid outlet tube (4) is connected to the impeller assembly (19), the separation tube (1) is connected to the motor assembly, and the rotating shaft on the impeller assembly (19) passes through the solid-liquid separation device and is connected to the drive shaft (20) on the motor assembly; or, the outer periphery of the separation tube (1) is connected to the motor assembly, the drive shaft (20) on the motor assembly is connected to the lower end of the rotating shaft of the inducer wheel (13) provided in the tube, and the upper end of the rotating shaft of the inducer wheel (13) passes through the separation tube (1) and the liquid outlet tube (4) and is connected to the impeller assembly (19).

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