Sand filtering device and water pump

Abstract

The invention relates to a sand filtering device and a water pump, and relates to the technical field of water pumps, the sand filtering device comprises an outer cylinder and a filtering mechanism arranged in the outer cylinder, the filtering mechanism comprises an inner cylinder, the inner cylinder is provided with an annular flow channel, the annular flow channel is provided with a sand discharging channel, and the inner cylinder and the outer cylinder form a sand storage cavity; and the sand discharge channel is communicated with the sand storage cavity. The water pump impeller has the advantage that the sand content entering the water pump impeller can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of water pumps, and in particular to a sand filtering device and a water pump. Background Art

[0002] During the use of water pumps, especially well pumps, sand in the environment often enters the working parts. During the high-speed rotation of the impeller, the sand is easily cut by the high-speed rotation of the water flow, causing wear or even penetration of the working parts, resulting in performance degradation or damage to the water pump. Summary of the invention

[0003] In view of the deficiencies in the prior art, one of the purposes of the present application is to provide a sand filtering device and a water pump, which have the advantage of being able to reduce the amount of sand entering the impeller of the water pump.

[0004] The above-mentioned purpose of the present application is achieved through the following technical solutions: A sand filtering device comprises a filtering mechanism, wherein the filtering mechanism comprises an inner cylinder, an annular flow channel is arranged on the inner cylinder, the annular flow channel comprises a plurality of spiral grooves, the plurality of spiral grooves are connected in sequence in a spiral shape, the annular flow channel is provided with a sand discharge channel, and the sand discharge channel is located at the axial contact of adjacent spiral grooves or below the groove wall of the spiral groove near the axial contact of two spiral grooves.

[0005] By adopting the above technical solution, in use, water enters the inner cylinder and realizes annular flow through the annular flow channel. During the annular flow process, under the action of centrifugal force, impurities such as sand will gather and be discharged through the sand discharge channel, thereby achieving the purpose of reducing the sand content entering the water pump impeller.

[0006] In a preferred example, the present application can be further configured as follows: the inner tube includes a support tube and a filter portion, the filter portion is located outside the support tube and connected to the support tube to form an annular flow channel, the support tube is provided with a flow hole connected to the annular flow channel, and the sand discharge channel is connected to the annular flow channel.

[0007] By adopting the above technical solution, in use, the liquid enters into the annular flow channel through the flow hole and forms an annular flow channel in the annular flow channel.

[0008] In a preferred example, the present application can be further configured as follows: there is at least one annular flow channel.

[0009] By adopting the above technical solution, more water can enter the annular flow channels by setting a certain number of annular flow channels, and the lead is larger, the climbing resistance of the water flow is increased, and the sediment is easier to break away from the water flow and be separated.

[0010] In a preferred example, the present application can be further configured as follows: it also includes an outer cylinder, the filtering mechanism is arranged in the outer cylinder, and a sand storage chamber is formed between the outer cylinder and the inner cylinder.

[0011] By adopting the above technical solution, the existence of the sand storage cavity can gather the filtered sediment.

[0012] In a preferred example, the present application can be further configured as follows: the spiral groove includes a sand retention groove, the sand retention groove is located on the side of the annular flow channel away from the support tube, the sand retention groove is connected to the sand discharge channel, and the sand retention groove is the lowest end of the spiral groove.

[0013] By adopting the above technical solution, the existence of the sand retention trough at the lowest end can reduce the probability of sediment re-entering the water flow under the action of the water flow.

[0014] In a preferred example, the present application can be further configured as follows: the filter portion includes a plurality of connected spirals, the spirals include a connector and a contact piece, the contact piece and the connector are connected, and a contact piece and a connector of another spiral form a sand discharge channel.

[0015] By adopting the above technical solution, the sand discharge channel is made lower, making it easier to discharge the sand.

[0016] In a preferred example, the present application can be further configured as follows: it also includes a boosting mechanism, which is arranged at the water inlet end and / or the water outlet end of the outer cylinder, and the boosting mechanism includes a rotating shaft and a boosting wheel, and the rotating shaft extends into the inner cylinder.

[0017] By adopting the above technical solution, the presence of the booster mechanism can reduce the hydraulic loss caused by the separation of sediment.

[0018] In a preferred example, the present application can be further configured as follows: the rotating shaft and the inner cylinder form a local or dynamic water seal.

[0019] By adopting the above technical solution, that is, by forming a local or dynamic water seal, a better sediment removal effect can be achieved for water flows with a large amount of sediment.

[0020] In a preferred example, the present application can be further configured as follows: the inner cylinder includes a support cylinder, the annular flow channel is arranged on the outer wall surface of the support cylinder, the inner diameter of the support cylinder is R1, the outer diameter is R2, the distance from the outer wall surface of the annular flow channel to the axis is R3, and the distance between the support cylinder and the rotating shaft is B, then π(R1 2 -(R1-B) 2 )≤π(R3 2 -R2 2 ).

[0021] By adopting the above technical solution, when the amount of sediment is low, a gap can be provided between the inner cylinder and the rotating shaft.

[0022] The present application also discloses a water pump: the sand filter device mentioned above is adopted, and the sand filter device is installed in front of the inlet of the water pump.

[0023] This application has the following advantages: 1. The spiral annular flow channel and the setting of the sand discharge channel enable the water flow in the annular flow channel to discharge the sand due to impact, gravity and other effects during the forward process; 2. The existence of the sand retention channel reduces the probability of subsequent water flow causing sediment to re-enter the water flow; 3. A relatively stable environment is formed between the sand storage chamber and the inner tube, which is conducive to the accumulation of sediment; 4. When the inner wall of the support tube contacts the rotating shaft / connector or has a small gap, the water flow under the action of the inducer enters the annular flow channel, thereby improving the ability to filter sediment; 5. When there is a gap (not a small gap) between the inner wall of the support tube and the rotating shaft / connector, the flow that directly passes through the filter device is merged at the water outlet end of the annular flow channel and the open end of the sand collecting tube to increase the flow rate and supplement the flow; 6. Setting a booster wheel can provide the initial circulation (circulation) to offset the loss caused by the annular flow channel, and can also improve the anti-cavitation performance of the water pump; 7. The modular sand filter device makes it easy to install and disassemble, and to select different combinations according to actual scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the internal structure of the outer cylinder of this application.

[0025] Figure 2 It is a schematic diagram of the explosion structure of the outer cylinder and the inner cylinder of the present application.

[0026] Figure 3 It is a schematic diagram of the internal structure of the boosting mechanism and the filtering mechanism of the present application.

[0027] Figure 4 It is a schematic diagram of the structure of a water pump in which a filtering device is installed in this application.

[0028] Figure numerals: 1. outer cylinder; 11. sand storage chamber; 12. discharge hole; 2. filtering mechanism; 21. supporting cylinder; 211. flow hole; 22. filtering part; 221. transverse plate; 222. connecting wall; 223. vertical side wall; 224. sand discharge channel; 225. sand retention groove; 23. annular flow channel; 3. boosting mechanism; 31. rotating shaft; 32. boosting wheel. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings.

[0030] Reference Figure 1-Figure 3 , is a sand filter device disclosed in the present application, comprising a booster mechanism 3, an outer cylinder 1 and a filter mechanism 2 disposed in the outer cylinder 1, the filter mechanism 2 comprising an inner cylinder, the inner cylinder comprising a support cylinder 21 and a filter portion 22, the filter portion 22 having one or more annular spirals wound around the support cylinder 21 to form at least one annular flow channel 23. When there are multiple annular flow channels 23, they may be in the form of multi-head spirals. At least one flow hole 211 is disposed on the support cylinder 21, and the flow hole 211 is connected to the annular flow channel 23.

[0031] The annular flow channel 23 is provided with a sand discharge channel 224. The inner tube and the outer tube 1 form a sand storage chamber 11. The sand discharge channel 224 is connected to the sand storage chamber 11. The annular flow channel 23 includes a plurality of spiral grooves (i.e., the annular flow channel 23 is spirally arranged, and a single spiral is regarded as a spiral groove). The spiral groove includes a sand retention groove 225. The sand retention groove 225 is located on the side of the annular flow channel 23 close to the outer tube 1. The sand retention groove 225 is connected to the sand discharge channel 224. The sand retention groove 225 is the lowest end of the spiral groove. The bottom of the sand storage chamber 11 is inclined, and a discharge hole 12 is provided at the lowest point. The discharge hole 12 discharges the silt to the outside of the water pump through a pipeline. See Figure 1 , the lowest end refers to Figure 1 The lowest end of the spiral groove in the cross-sectional schematic diagram.

[0032] The filter part 22 includes a plurality of connected spirals (i.e., the filter part 22 is spirally arranged, and a single-turn spiral is regarded as a spiral), the spiral includes a connector and a contact member, the contact member and the connector are connected, and a contact member and a connector of another spiral form a sand discharge channel 224. The spiral includes a transverse plate 221 and a vertical side wall 223, the transverse plate 221 and the vertical side wall 223 are connected by a connecting wall 222, the cross section of the connecting wall 222 can be an arc or a broken line, at least a part of the vertical side wall 223 is a contact member, and is in contact with the connector of the next spiral (i.e., the transverse plate 221 and the connecting wall 222, or the transverse plate 221 and the connecting wall 222 and at least a part of the vertical side wall 223). At this time, the contact member and the connector of the next spiral form a sand retention groove 225, and the sand discharge channel 224 is formed by the deformation of the contact member. In this embodiment, the contact member is an elastic member, such as a rubber material. In other embodiments, the contact piece may be a non-elastic piece, in which case the contact piece does not contact the connector of the next spiral body, and there is a channel between the two for the sand to pass through, which is the sand discharge channel 224. The lower end of the sand storage chamber 11 is U-shaped, and the lowest contact piece extends into the sand storage chamber 11 and is close to or in contact with the inner wall of the sand storage chamber 11. When the contact piece is connected to the connector of the next spiral body, the sand discharge channel 224 is hole-shaped or groove-shaped and is located at or close to the connection between the two.

[0033] The boosting mechanism 3 is arranged at the water inlet end and / or the water outlet end of the outer cylinder 1. The boosting mechanism 3 includes a rotating shaft 31 and a boosting wheel 32. The rotating shaft 31 extends into the inner cylinder. The pre-rotation direction of the boosting wheel 32 is the same as the rotation direction of the annular flow channel 23.

[0034] Assume that the inner diameter of the support tube 21 is R1, the outer diameter is R2, the distance from the outer wall of the annular flow channel 23 to the axis is R3, and the distance between the support tube 21 and the rotating shaft 31 is B, then π(R1 2 -(R1-B) 2 )≤π(R3 2 -R2 2 ), that is, the annular axial projection area of ​​the spacing formed inwardly by the support cylinder 21 is not greater than the axial projection area of ​​the annular flow channel 23. The rotating shaft 31 and the inner cylinder form a local or dynamic water seal, that is, when B is small, such as B≤0.5mm.

[0035] When connected to the water pump, the shaft of the water pump and / or the connecting shaft extending into the support tube 21 should also be regarded as a part of the rotating shaft 31 .

[0036] The present application also discloses a water pump, referring to Figure 4 , including the above-mentioned sand filtering device, which is installed in the front part of the water inlet of the water pump, that is, it is indirectly or directly connected to the water pump, that is, the sand filtering device is located between the motor and the pump body, and the pre-rotation direction of the booster wheel 32 is the same as the rotation direction of the impeller in the pump body; the rotating shaft 31 of the booster wheel 32 is coaxially connected with the motor output shaft and the pump shaft; by setting a modular sand filtering device, the sand filtering device is easy to assemble and disassemble, and different combinations can be selected according to actual scenarios.

[0037] The implementation principle of this embodiment is as follows: after the water flows through the boost wheel 32, the water flows into the annular flow channel 23. During the forward movement of the water flow in the flow channel, due to the impact, gravity and other effects, the silt enters the sand storage chamber 11, and is discharged from the discharge hole 12 under the action of the inclined bottom surface of the sand storage chamber 11. The pipeline can be connected to the discharge hole 12 as needed to discharge the silt to a suitable position.

[0038] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sand filtering device, characterized in that: The invention comprises a filtering mechanism (2), wherein the filtering mechanism (2) comprises an inner cylinder, an annular flow channel (23) is provided on the inner cylinder, the annular flow channel (23) comprises a plurality of spiral grooves, the plurality of spiral grooves are connected in sequence in a spiral shape, the annular flow channel (23) is provided with a sand discharge channel (224), and the sand discharge channel (224) is located at the axial contact point of adjacent spiral grooves or below the groove wall of the spiral groove close to the axial contact point of two spiral grooves.

2. A sand filter device according to claim 1, characterized in that: The inner cylinder comprises a support cylinder (21) and a filter portion (22); the filter portion (22) is located outside the support cylinder (21) and is connected to the support cylinder (21) to form an annular flow channel (23); a flow hole (211) connected to the annular flow channel (23) is provided on the support cylinder (21); and the sand discharge channel (224) is connected to the annular flow channel (23).

3. A sand filtering device according to claim 1, characterized in that: There is at least one annular flow channel (23).

4. A sand filter device according to claim 1, characterized in that: It also comprises an outer cylinder (1), a filtering mechanism (2) is arranged inside the outer cylinder (1), and a sand storage chamber (11) is formed between the outer cylinder (1) and the inner cylinder.

5. A sand filtering device according to claim 1, characterized in that: The spiral groove comprises a sand retention groove (225), the sand retention groove (225) is located on a side of the annular flow channel (23) away from the support tube (21), the sand retention groove (225) is connected to the sand discharge channel (224), and the sand retention groove (225) is the lowest end of the spiral groove.

6. A sand filter device according to claim 2, characterized in that: The filter part (22) comprises a plurality of connected spiral bodies, wherein the spiral bodies comprise a connector and a contact piece, the contact piece and the connector are connected, and a contact piece and a connector of another spiral body form a sand discharge channel (224).

7. A sand filtering device according to claim 1, characterized in that: It also includes a boosting mechanism (3), which is arranged at the water inlet end and / or the water outlet end of the outer cylinder (1), and includes a rotating shaft (31) and a boosting wheel (32), and the rotating shaft (31) extends into the inner cylinder.

8. A sand filter device according to claim 7, characterized in that: The rotating shaft (31) and the inner cylinder form a local or dynamic water seal.

9. A sand filter device according to claim 7, characterized in that: The inner cylinder comprises a support cylinder (21), and the annular flow channel (23) is arranged on the outer wall surface of the support cylinder (21). Assuming that the inner diameter of the support cylinder (21) is R1, the outer diameter is R2, the distance from the outer wall surface of the annular flow channel (23) to the axis is R3, and the spacing between the support cylinder (21) and the rotating shaft (31) is B, then π(R1 2 -(R1-B) 2 )≤π(R3 2 -R2 2 ).

10. A water pump, characterized in that: The sand filter device according to any one of claims 1 to 9 is used, and the sand filter device is installed in front of the inlet of the water pump.

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