Centrifugal net type filter

Abstract

The utility model belongs to water treatment equipment, and discloses a centrifugal screen type filter, which aims to solve the problems that a conical pipe section at the lower part of a centrifugal cylinder in the prior art is very seriously abraded and particularly seriously abraded at a sand inlet of a sand accumulation tank, and comprises a centrifugal filter unit and a screen type filter unit, the centrifugal filtering unit comprises a centrifugal barrel, a conical barrel is arranged on the lower portion of the centrifugal barrel, a lower pipe opening of the conical barrel is connected with a sand inlet of the sand accumulation tank, the flow guide direction of a water inlet in the centrifugal barrel is arranged in the tangential direction of the centrifugal barrel, a lining is fixedly installed on the inner side of the lower portion of the conical barrel, and the lower end of the lining extends to the sand inlet of the sand accumulation tank. The lower end of the lining extends outwards in the radial direction to form an annular shielding part. The pipe section, close to the sand inlet of the sand accumulation tank, of the centrifugal barrel can be protected, and the wear resistance of the pipe section is improved. Water carrying sand and stones is effectively prevented from entering the cavity gaps and directly abrading the conical barrel, accurate protection is achieved, and the service life of the product is prolonged to the maximum extent.

Description

Technical Field

[0001] The utility model relates to a water treatment device, in particular to a centrifugal screen filter. Background Art

[0002] The centrifugal screen filter is mainly used for the primary filtration of sand-containing water and can separate sand and stones in water. This kind of filter is usually installed beside wells and pumping stations, and is most suitable for separating a large amount of sand and stones in water. Generally, it is not used alone, but only as the front-stage filtration of the filtration system.

[0003] The existing centrifugal screen filter, such as an automatic flushing centrifugal screen filter disclosed in Patent CN220715141U, includes a controller, a centrifugal filter and N screen filter units, where N = 4 - 6; the centrifugal filter includes a centrifugal tank and a sand settling tank communicated with the lower part thereof. The upper part of the centrifugal tank is communicated with a centrifugal water inlet pipe and an inverted U-shaped centrifugal water outlet pipe. The sand settling tank is provided with a sand discharge pipe, and a sand discharge electric butterfly valve is arranged on the sand discharge pipe.

[0004] The existing technology can perform combined filtration on water carrying sand and gravel, and has a good filtration effect. However, it is found in actual use that the flowing water with sand and gravel seriously wears the conical pipe section at the lower part of the centrifugal cylinder, and at the same time, it constantly brings up the sedimented sand and gravel again, and the wear at the sand inlet position of the sand accumulation tank is particularly serious. The service life of the centrifugal cylinder is greatly reduced, and it is necessary to frequently stop for maintenance, seriously affecting the work efficiency. The existing technology cannot solve the above technical problems. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problems that the conical pipe section at the lower part of the centrifugal cylinder in the existing technology is seriously worn and the wear at the sand inlet position of the sand accumulation tank is particularly serious, and a centrifugal screen filter is provided.

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

[0007] A centrifugal screen filter includes a centrifugal filtration unit and a screen filtration unit. The water outlet of the centrifugal filtration unit is communicated with the water inlet of the screen filtration unit through a conduit. The centrifugal filtration unit includes a centrifugal cylinder. A conical cylinder is arranged at the lower part of the centrifugal cylinder. The lower pipe orifice of the conical cylinder is connected with the sand inlet of the sand accumulation tank. The guiding direction of the water inlet on the centrifugal cylinder is arranged along the tangential direction of the centrifugal cylinder. A bushing is fixedly installed on the inner side of the lower part of the conical cylinder. The lower end of the bushing extends to the position of the sand inlet of the sand accumulation tank. The outer peripheral surface of the bushing is closely attached to the inner peripheral surface of the conical cylinder, and the lower end of the bushing extends radially outward to form an annular shielding portion.

[0008] Further, one end of the conduit extends into the centrifugal cylinder, and the end of the conduit is provided with a chamfered surface.

[0009] Further, the upper edge of the bushing is welded to the conical cylinder, and the lower edge of the bushing is welded to the inlet of the sand accumulation tank.

[0010] Further, the shielding part is located inside the sand accumulation tank and covers the welded point at the lower edge of the bushing.

[0011] Further, the cross-section of the shielding part is arc-shaped and the center of curvature of the arc is located on the side where the welded point of the lower edge of the bushing is located.

[0012] Further, a gasket is provided in the gap between the bushing and the centrifugal cylinder.

[0013] Further, a baffle with a vertically placed plate surface is provided in the orifice of the lower end pipe of the bushing.

[0014] Further, one end of the conduit vertically extends into the upper middle part of the centrifugal cylinder, and the angle of the chamfered surface is 40° - 50°.

[0015] The utility model has the following beneficial effects compared with the prior art:

[0016] By arranging a bushing in the conical cylinder at the lower part of the centrifugal cylinder, the utility model can protect the pipe section of the centrifugal cylinder near the sand inlet of the sand accumulation tank and improve the wear resistance of this pipe section. At the same time, the upper and lower edges of the bushing are welded and connected to the pipe section of the conical cylinder at the lower part of the centrifugal cylinder to form a sealed fit between the two, which can prevent water from entering the cavity between the bushing and the conical cylinder to form a jet flow, effectively preventing water from carrying sand and gravel into the cavity and directly wearing the conical cylinder at the lower part of the centrifugal cylinder. For areas with a large amount of sand, precise protection is carried out, and the service life of the product is maximally improved at the lowest cost.

[0017] The bottom of the bushing of the utility model extends outwards to form an annular shielding part, so as to form a transition between the bottom of the bushing and the sand accumulation tank, prevent the welded point at the bottom of the bushing from being worn by sand and gravel, causing the weld to fail, avoid the possibility of water entering the interlayer, and scouring and spraying the outer shell, effectively playing the role of protecting the double layer and improving the service life of the centrifugal cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional external view schematic diagram of the utility model.

[0019] Figure 2 is a sectional view of the upper part of the cylinder body of the centrifugal cylinder.

[0020] Figure 3 is a connection schematic diagram of the lower part of the centrifugal cylinder and the sand accumulation tank.

[0021] Figure 4 is Figure 3 an enlarged view of part A in

[0022] Figure 5It is a structural schematic diagram of the bushing of the utility model.

[0023] Figure 6 Schematic diagram of the baffle.

[0024] The meanings of the reference numerals are as follows: 1. centrifugal filter unit; 11. centrifugal cylinder; 12. water inlet; 13. conduit; 14. cut-angle surface; 15. conical cylinder; 2. mesh filter unit; 3. sand storage tank; 4. bushing; 41. shielding part; 5. sealing gasket; 6. baffle. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0026] like Figures 1-5 As shown, a centrifugal mesh filter comprises a centrifugal filter unit 1 and a mesh filter unit 2. The mesh filter unit 2 has the same structure as that in patent CN220715141U, which is the prior art and will not be described in detail. The water outlet of the centrifugal cylinder 11 in the centrifugal filter unit 1 is connected to the water inlet of the mesh filter unit 2 through a conduit 13. The centrifugal filter unit 1 comprises a centrifugal cylinder 11, one end of the conduit 13 vertically extends into the middle and upper part of the centrifugal cylinder 11, and the end of the conduit 13 is provided with a cut angle surface 14, and the angle of the cut angle surface 14 is 40°-50°.

[0027] A conical cylinder 15 which is an integral structure with the centrifugal cylinder 11 is provided at the lower part of the centrifugal cylinder 11, the lower pipe mouth of the conical cylinder 15 is welded to the sand inlet of the sand storage tank 3, the diversion direction of the water inlet 12 on the centrifugal cylinder 11 is arranged along the tangential direction of the centrifugal cylinder 11, a bushing 4 is fixedly installed on the inner side of the lower part of the conical cylinder 15, the lower end of the bushing 4 extends to the sand inlet position of the sand storage tank 3, the outer circumferential surface of the bushing 4 is tightly fitted with the inner circumferential surface of the conical cylinder 15, and the lower end of the bushing 4 extends outwardly in the radial direction to form an annular shielding portion 41, the upper edge of the bushing 4 is welded to the conical cylinder 15, the lower edge of the bushing 4 is welded to the inlet of the sand storage tank 3, the shielding portion 41 is located in the sand storage tank 3 and is covered on the welding point of the lower edge of the bushing 4.

[0028] As a preferred solution, the cross section of the shielding portion 41 is arc-shaped and the center of curvature of the arc is located on the side where the welding point (point a) of the lower edge of the bushing 4 is located. The arc-shaped shielding portion 41 is conducive to guiding the water flow.

[0029] As a preferred solution, a sealing gasket 5 is provided in the gap between the liner 4 and the conical cylinder 15. The sealing gasket 5, as a filling medium between the liner 4 and the centrifugal cylinder 11, can further prevent the water flow from carrying sand and gravel into the gap between the liner 4 and the conical cylinder 15 to form a jet.

[0030] like Figure 6As shown in the figure, the present application also provides a solution to reduce the fluidity of water at the sand inlet of the sand accumulation tank 3, that is, a baffle 6 with a vertical plate surface is arranged in the orifice area of the lower end pipe orifice of the bushing 4. By adding the baffle 6, the water flow near the sand inlet of the sand accumulation tank 3 can be blocked, so that no swirl will be formed at this position to lift sand and stones to cause wear to the solder joints of the lower end pipe orifice of the bushing 4, further ensuring the integrity of the solder joints.

[0031] In the present utility model, after the water inlet 12 is opened, the water source enters the centrifugal cylinder 11 and the conical cylinder 15 and generates a swirl. During the swirl process of the water source, large particle sediment sinks into the sand accumulation tank 3 under the action of centrifugal force and gravity. The water outlet of the centrifugal cylinder 11 and the water inlet of the mesh filter unit 2 are connected by a conduit 13. The water source that has removed large particle sediment through centrifugal filtration enters the mesh filter unit 2 through the conduit 13 for further filtration. (The filtration principle of the mesh filter unit is the same as that in the patent CN220715141U and is not the innovation point of this patent). The conduit 13 is connected through the top of the centrifugal cylinder 11 and extends vertically to the upper middle position inside the centrifugal cylinder 11. The pipe orifice end surface of the conduit 13 located inside the centrifugal cylinder 11 is arranged at an angle to the vertical direction. In the traditional design of the centrifugal cylinder 11, due to its own weight, the sand and stones slowly sink from the central axis of the centrifugal cylinder 11. The water outlet is in the center of the centrifugal cylinder 11 and opens downward, directly facing the swirling sand and stone concentration area, interfering with the normal separation of water and sand and stones. Therefore, the present application further improves the characteristics of the water outlet (that is, the pipe orifice of the conduit 13 located inside the centrifugal cylinder 11), that is, by arranging the pipe orifice end surface of the conduit 13 located inside the centrifugal cylinder 11 at an angle to the vertical direction, the pipe orifice of the conduit 13 forms an oblique cutting angle, facing the water separated and rotating in the outer circle, effectively reducing the water resistance and not interfering with the separation effect of water and sand and stones in the centrifugal cylinder 11.

Claims

1. A centrifugal screen filter, comprising a centrifugal filter unit (1) and a screen filter unit (2), wherein the water outlet of the centrifugal filter unit (1) and the water inlet of the screen filter unit (2) are connected via a conduit (13), the centrifugal filter unit (1) comprises a centrifugal cylinder (11), a conical cylinder (15) is provided at the lower part of the centrifugal cylinder (11), the lower pipe opening of the conical cylinder (15) is connected to the sand inlet of a sand storage tank (3), the water inlet (12) on the centrifugal cylinder (11) is arranged in a tangential direction of the centrifugal cylinder (11), and the centrifugal filter unit (1) comprises a centrifugal cylinder (11), wherein the water outlet of the centrifugal cylinder (11) is connected to the sand inlet of the sand storage tank (3), and the water inlet (12) on the centrifugal cylinder (11) is arranged in a tangential direction of the centrifugal cylinder (11), and the centrifugal filter unit (1) comprises a centrifugal cylinder (11), wherein the centrifugal cylinder (1 ... A bushing (4) is fixedly mounted on the inner side of the lower portion of the conical cylinder (15), the lower end of the bushing (4) extending to the sand inlet of the sand storage tank (3), the outer circumferential surface of the bushing (4) closely fitting with the inner circumferential surface of the conical cylinder (15), and the lower end of the bushing (4) extending outwardly in a radial direction to form an annular shielding portion (41).

2. A centrifugal screen filter according to claim 1, characterized in that: One end of the conduit (13) extends into the centrifugal cylinder (11), and an angled surface (14) is provided at the end of the conduit (13).

3. A centrifugal screen filter according to claim 2, characterized in that: The upper edge of the bushing (4) is welded to the conical cylinder (15), and the lower edge of the bushing (4) is welded to the inlet of the sand storage tank (3).

4. A centrifugal screen filter according to claim 3, characterized in that: The shielding portion (41) is located in the sand storage tank (3) and covers the welding point on the lower edge of the bushing (4).

5. A centrifugal screen filter according to claim 4, characterized in that: The shielding portion (41) has a cross-section in the shape of an arc, and the center of curvature of the arc is located on the side where the welding point of the lower edge of the bushing (4) is located.

6. A centrifugal screen filter according to claim 1 or 4, characterized in that: A sealing gasket (5) is provided in the gap between the bushing (4) and the centrifugal cylinder (11).

7. A centrifugal screen filter according to claim 6, characterized in that: A baffle plate (6) with a vertical plate surface is arranged in the opening area of ​​the lower end pipe opening of the bushing (4).

8. A centrifugal screen filter according to claim 2, characterized in that: One end of the conduit (13) vertically extends into the middle and upper part of the centrifugal cylinder (11), and the angle of the cut surface (14) is 40°-50°.

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