Inlet filtering structure for self-suction chemical centrifugal pump

Abstract

The utility model discloses an inlet filtering structure for a self-suction chemical centrifugal pump, which comprises a base, a pump cover is fixedly mounted at the upper end of the side of the base, a suction chamber is arranged in the pump cover, an impeller component is arranged in the suction chamber, an annular bulge is arranged on the inner wall, close to a suction inlet, of the suction chamber, and an annular slot is formed in the annular inner wall of the annular bulge; and an elastic insertion block is inserted into the annular insertion groove. According to the utility model, the elastic filter screen is inserted into the annular clamping groove in the elastic insertion block to be fixed, and the elastic insertion block is inserted into the annular insertion groove in the annular bulge, so that the cylindrical bulge is inserted into the cylindrical clamping groove in the elastic insertion block, and the four rectangular bulges are respectively inserted into the four rectangular clamping grooves; the elastic insertion block with the elastic filter screen is effectively positioned and fixed to the annular protrusion, the structure is simple, replacement and replacement are convenient, meanwhile, the double-layer elastic filter screen can filter an inlet of the suction chamber, normal operation of the impeller is prevented from being affected, and normal operation of the pump is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of self-priming centrifugal pump technology, and in particular to an inlet filter structure for a self-priming chemical centrifugal pump. Background Technology

[0002] A self-priming centrifugal pump is a type of centrifugal pump. A self-priming centrifugal pump has an additional suction chamber at the inlet. After the pump stops, some liquid remains in the suction chamber. When the pump is restarted, the liquid remaining in the suction chamber circulates within the pump, drawing gas from the suction pipe into the impeller. After mixing in the impeller, the mixture enters the gas-liquid separation chamber added at the outlet to separate the gas and liquid. The gas is discharged outside the pump, and the liquid flows back into the suction chamber until the suction pipe is full of liquid, allowing for normal liquid transport.

[0003] The existing self-priming chemical centrifugal pumps lack a filter structure at the inlet, which easily allows impurities to enter the suction chamber, affecting the normal operation of the impeller and even causing the pump to stop. This paper proposes an inlet filter structure for self-priming chemical centrifugal pumps to solve the above problems. Utility Model Content

[0004] In view of the shortcomings and defects in the existing technology, this utility model proposes an inlet filter structure for a self-priming chemical centrifugal pump, which solves the technical problem that the existing self-priming chemical centrifugal pumps lack a filter structure at the inlet, which easily leads to impurities entering the suction chamber, affecting the normal operation of the impeller, and may even cause the pump to stop.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An inlet filter structure for a self-priming chemical centrifugal pump includes a base, a pump cover fixedly installed on the upper side of the base, a suction chamber inside the pump cover, an impeller assembly inside the suction chamber, an annular protrusion on the inner wall of the suction chamber near the suction inlet, an annular slot on the annular inner wall of the annular protrusion, an elastic block inserted into the annular slot, two layers of elastic filter screens on the annular inner wall of the elastic block, and the annular sidewall of the elastic block engaging and fixing with the annular inner wall of the annular slot.

[0007] Preferably, the inner walls of the left and right sides of the annular slot are provided with a plurality of arc-shaped protrusions, and the plurality of arc-shaped protrusions on the same side are evenly distributed around the annular slot, and the plurality of arc-shaped protrusions respectively abut against the left and right side walls of the elastic insert.

[0008] Preferably, the inner wall of the elastic insert has two annular slots, and the elastic filters on both sides are respectively inserted into the two annular slots.

[0009] Preferably, the annular slot has two symmetrically distributed cylindrical protrusions on its annular inner wall, and the elastic insert has two symmetrically distributed cylindrical slots on its annular side wall. The two cylindrical protrusions are respectively inserted into the two cylindrical slots. The two cylindrical protrusions have four rectangular protrusions on their annular side walls away from the annular slot. The two cylindrical slots each have four rectangular slots on their annular inner walls. The four rectangular protrusions are respectively inserted into the four rectangular slots. The four rectangular protrusions and the four rectangular slots are arranged in a cross shape.

[0010] Preferably, the arc-shaped protrusion and the rectangular protrusion are integrally formed with the annular protrusion, and the annular protrusion is integrally formed with the pump cover.

[0011] Preferably, the elastic insert has two arc-shaped pull blocks on the side wall away from the suction chamber. The two arc-shaped pull blocks are symmetrically distributed between each other. The arc-shaped inner walls of the two arc-shaped pull blocks are seamlessly connected to the annular inner wall of the elastic insert. The arc-shaped pull blocks and the annular protrusion are integrally formed.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] The elastic filter is fixed by inserting it into the annular slot on the elastic block, and the elastic block is inserted into the annular slot on the annular protrusion. The cylindrical protrusion is inserted into the cylindrical slot on the elastic block, and the four rectangular protrusions are inserted into the four rectangular slots respectively. This effectively positions and fixes the elastic block with the elastic filter on the annular protrusion. The structure is simple and easy to replace. At the same time, the double-layer elastic filter can provide filtration at the inlet of the suction chamber to prevent it from affecting the normal operation of the impeller and ensure the normal operation of the pump. Attached Figure Description

[0014] Figure 1 This is a perspective view of an inlet filter structure for a self-priming chemical centrifugal pump proposed in this utility model.

[0015] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0016] Figure 3 This is a schematic diagram of the annular protrusion in the inlet filter structure of a self-priming chemical centrifugal pump proposed in this utility model.

[0017] Figure 4 This is a schematic diagram of the cylindrical and rectangular protrusions of the inlet filter structure for a self-priming chemical centrifugal pump proposed in this utility model.

[0018] Figure 5 This is a schematic diagram of the elastic insert block of the inlet filter structure for a self-priming chemical centrifugal pump proposed in this utility model.

[0019] In the diagram: 1. Base, 2. Pump cover, 3. Suction chamber, 4. Impeller assembly, 5. Annular protrusion, 6. Annular slot, 7. Flexible insert, 8. Flexible filter, 9. Arc-shaped protrusion, 10. Annular groove, 11. Columnar protrusion, 12. Columnar groove, 13. Rectangular protrusion, 14. Rectangular groove, 15. Arc-shaped pull block. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-5 An inlet filter structure for a self-priming chemical centrifugal pump includes a base 1, a pump cover 2 fixedly installed on the upper side of the base 1, a suction chamber 3 inside the pump cover 2, an impeller assembly 4 inside the suction chamber 3, an annular protrusion 5 on the inner wall of the suction chamber 3 near the suction inlet, an annular slot 6 on the annular inner wall of the annular protrusion 5, and several arc-shaped protrusions 9 on the inner walls of both sides of the annular slot 6. The arc-shaped protrusions 9 on the same side are evenly distributed around the annular slot 6. The arc-shaped protrusions 9 can effectively provide stable limiting for the elastic plug 7 inserted into the annular slot 6, preventing the flow of liquid in the suction chamber 3 from causing the elastic plug 7 to be inserted into the annular slot 6. The elastic insert 7 is separated from the annular slot 6. Several arc-shaped protrusions 9 abut against the left and right sidewalls of the elastic insert 7. The elastic insert 7 is inserted into the annular slot 6. The elastic insert 7 is made of fluororubber. Two layers of elastic filters 8 are provided on the annular inner wall of the elastic insert 7. The elastic filters 8 are made of corrosion-resistant alloy. Two annular slots 10 are provided on the annular inner wall of the elastic insert 7. The elastic filters 8 on both sides are respectively inserted into the two annular slots 10. The elastic filters 8 on both sides are respectively inserted into the two annular slots 10 on the elastic insert 7 for locking and fixing. When disassembling, simply press the elastic filters 8 to separate them from the annular slots 10.

[0023] The annular sidewall of the elastic insert 7 is engaged and fixed with the annular inner wall of the annular slot 6. The annular inner wall of the annular slot 6 has two symmetrically distributed cylindrical protrusions 11, and the annular sidewall of the elastic insert 7 has two symmetrically distributed cylindrical slots 12. The two cylindrical protrusions 11 are respectively inserted into the two cylindrical slots 12. Four rectangular protrusions 13 are provided on the annular sidewall of the two cylindrical protrusions 11 away from the annular slot 6. The annular inner walls of the two cylindrical slots 12 each have four rectangular slots 14, and the four rectangular protrusions 13 are respectively inserted into the four rectangular slots 14. The four rectangular protrusions 13 and the four rectangular slots 14 are arranged in a cross shape. The arc-shaped protrusion 9 and the rectangular protrusions 13 are integrally formed with the annular protrusion 5. Inserting the elastic insert 7 into the annular slot 6 on the annular protrusion 5 allows the two cylindrical protrusions 11 in the annular slot 6 to be respectively inserted into the elastic insert. The two cylindrical slots 12 on the 7 allow the four rectangular protrusions 13 on the cylindrical protrusion 11 to be inserted into the four rectangular slots 14 in the annular slot 6, effectively positioning and fixing the elastic insert 7 with the double-layer elastic filter 8 on the annular protrusion 5. When disassembling, simply pull the two arc-shaped pull blocks 15 to separate the elastic insert 7 from the annular slot 6 until the rectangular protrusions 13 separate from the rectangular slots 14 and the cylindrical protrusions 11 separate from the cylindrical slots 12. The structure is simple and easy to replace. The annular protrusion 5 and the pump cover 2 are integrally formed. Two arc-shaped pull blocks 15 are provided on the side wall of the elastic insert 7 away from the suction chamber 3. The two arc-shaped pull blocks 15 are symmetrically distributed between them. The arc-shaped inner walls of the two arc-shaped pull blocks 15 are seamlessly connected to the annular inner wall of the elastic insert 7. The arc-shaped pull blocks 15 and the annular protrusion 5 are integrally formed. The arc-shaped pull blocks 15 facilitate the pulling of the elastic insert 7 from the annular slot 6.

[0024] In use, the elastic filters 8 on both sides are inserted into the two annular slots 10 on the elastic plug 7 for locking and fixing. The elastic plug 7 is then inserted into the annular slot 6 on the annular protrusion 5. This allows the two cylindrical protrusions 11 in the annular slot 6 to be inserted into the two cylindrical slots 12 on the elastic plug 7, and the four rectangular protrusions 13 on the cylindrical protrusions 11 to be inserted into the four rectangular slots 14 in the annular slot 6. This effectively positions and fixes the elastic plug 7 with the double-layer elastic filter 8 on the annular protrusion 5. During disassembly, simply pull the two arc-shaped pull blocks 15 to separate the elastic plug 7 from the annular slot 6 until the rectangular protrusions 13 separate from the rectangular slots 14 and the cylindrical protrusions 11 separate from the cylindrical slots 12. After pressing the elastic filter 8 to separate from the annular slots 10, the structure is simple and easy to replace. At the same time, the double-layer elastic filter 8 can provide filtration at the inlet of the suction chamber 3, preventing it from affecting the normal operation of the impeller and ensuring the normal operation of the pump.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An inlet filtering structure for a self-priming chemical centrifugal pump, comprising a base (1), a pump cover (2) fixedly installed on the side end of the base (1), an intake chamber (3) arranged in the pump cover (2), and an impeller assembly (4) arranged in the intake chamber (3), characterized in that, The annular protrusion (5) is provided on the inner wall of the suction chamber (3) near the suction port, the annular inner wall of the annular protrusion (5) is provided with an annular insertion slot (6), the annular insertion slot (6) is provided with an elastic insertion block (7), the annular inner wall of the elastic insertion block (7) is provided with two layers of elastic filter screens (8), and the annular side wall of the elastic insertion block (7) is clamped and fixed with the annular inner wall of the annular insertion slot (6).

2. The inlet filtering structure of a self-priming chemical centrifugal pump according to claim 1, characterized in that, The left and right inner walls of the annular insertion slot (6) are each provided with a plurality of arc-shaped protrusions (9), the arc-shaped protrusions (9) on the same side are arranged at equal intervals along the annular insertion slot (6), and the arc-shaped protrusions (9) are in abutment with the left and right end side walls of the elastic insertion block (7), respectively.

3. The inlet filtering structure of a self-priming chemical centrifugal pump according to claim 1, characterized in that, The annular inner wall of the elastic insertion block (7) is provided with two annular clamping grooves (10), and the two elastic filter screens (8) are respectively inserted into the two annular clamping grooves (10).

4. The inlet filtering structure of a self-priming chemical centrifugal pump according to claim 2, characterized in that, The annular inner wall of the annular insertion slot (6) is provided with two symmetrically-distributed cylindrical protrusions (11), the annular side wall of the elastic insertion block (7) is provided with two symmetrically-distributed cylindrical clamping grooves (12), the two cylindrical protrusions (11) are respectively inserted into the two cylindrical clamping grooves (12), the annular side wall of the two cylindrical protrusions (11) away from the annular insertion slot (6) is provided with four rectangular protrusions (13), the annular inner wall of the two cylindrical clamping grooves (12) is provided with four rectangular clamping grooves (14), and the four rectangular protrusions (13) are respectively inserted into the four rectangular clamping grooves (14). The four rectangular protrusions (13) and the four rectangular clamping grooves (14) are arranged in a cross shape.

5. The inlet filtering structure of a self-priming chemical centrifugal pump according to claim 4, characterized in that, The arc-shaped protrusions (9) and the rectangular protrusions (13) are integrally formed with the annular protrusion (5), and the annular protrusion (5) is integrally formed with the pump cover (2).

6. The inlet filtering structure of a self-priming chemical centrifugal pump of claim 1, wherein, The side wall of the elastic insertion block (7) away from the suction chamber (3) is provided with two arc-shaped pull blocks (15), the two arc-shaped pull blocks (15) are symmetrically arranged, the arc-shaped inner walls of the two arc-shaped pull blocks (15) are seamlessly connected with the annular inner wall of the elastic insertion block (7), and the arc-shaped pull blocks (15) are integrally formed with the annular protrusion (5).

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