CN214660892U

CN214660892U - Centrifugal pump with compound suction structure

Info

Publication number: CN214660892U
Application number: CN202022973060.5U
Authority: CN
Inventors: 王一飞; 李邦海
Original assignee: YIWU CITY NO 2 PETROCHEMICAL P
Current assignee: YIWU CITY NO 2 PETROCHEMICAL P
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-11-09
Anticipated expiration: 2030-12-11

Abstract

The utility model discloses a centrifugal pump with resorption structure, including the first pump body, the second pump body and the third pump body, the drum part has on the third pump body, the drum part is kept away from the one end of impeller and is inserted cylindric fixing base, the inside of fixing base is through screw fixedly connected with sealing ring, the fixing base closes on being close to the lateral wall of impeller and is connected with stud, and stud's end is fixed with the member through the nut, the central point of member puts and is fixed with the spacing post that inserts in the fixing base, the cover is equipped with the bobble with the sealing ring butt on the spacing post. The utility model discloses in, centrifugal pump simple structure, sealing ring and bobble butt on the fixing base allow the medium to get into, prevent the medium outflow, and the medium backward flow of effectual retaining valve intracavity, the centrifugal pump restart practicality of being convenient for, simple structure, the operation is reliable, has saved the manufacturing cost of enterprise.

Description

Centrifugal pump with compound suction structure

Technical Field

The utility model relates to a centrifugal pump technical field especially relates to a centrifugal pump with resorption structure.

Background

Centrifugal pumps are not self-priming by themselves. In order to enable self-priming, auxiliary equipment is required to ensure that there is a residual of liquid in the pump, particularly around the impeller, in order to have a self-priming effect on start-up, with the cost of production increasing by virtue of an additional device for stopping the shut-off, most commonly self-priming devices for centrifugal pumps are based on a bypass valve, which is a pressure control valve, either plunger-based or leaf spring-based. A disadvantage of plunger-based pressure control valves is that a large number of components (plunger, coil spring, seal and valve seat) are present and are prone to problems.

Therefore, the utility model provides a centrifugal pump with resorption structure.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the problems, a centrifugal pump with a double suction structure is provided.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a centrifugal pump with a re-suction structure comprises a first pump body, a second pump body and a third pump body, wherein the first pump body is a cylindrical component with internal threads, and is provided with a settling tank and an outlet, the second pump body and the third pump body are connected with the two sides of the first pump body in a screwing way, a pump cavity is formed inside the pump body, a shaft rod is arranged in the center of the second pump body, an impeller positioned inside the pump cavity is fixed at the end head of the shaft rod, the third pump body is provided with a cylindrical part, one end of the cylindrical part far away from the impeller is inserted with a cylindrical fixed seat, the interior of the fixed seat is fixedly connected with a sealing ring through a screw, the side wall of the fixed seat close to the impeller is rotatably connected with a double-end stud, and stud's end is fixed with the member through the nut, the central point of member puts and is fixed with the spacing post that inserts in the fixing base, the cover is equipped with the bobble with the sealing ring butt on the spacing post.

As a further description of the above technical solution:

the bottom of the settling tank is provided with a bolt which is screwed with the first pump body.

As a further description of the above technical solution:

the small ball is provided with a cylindrical groove which is not completely penetrated, the limiting column is inserted in the cylindrical groove, and the aperture of the cylindrical groove is larger than the diameter of the limiting column.

As a further description of the above technical solution:

the fixed seat is a cylindrical component, a folded edge clamped with the third pump body is arranged on the fixed seat, and an inlet is formed in the fixed seat.

As a further description of the above technical solution:

the inside wall and the bobble butt of sealing ring, and the inside of sealing ring is the flaring form.

As a further description of the above technical solution:

the import is cylindric fixing base and has seted up the round hole on the barrel head, the sealing ring is fixed in the inside that the fixing base is close to the import, one section that the inside of fixing base is located outside the sealing ring is the flaring form.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses in, centrifugal pump simple structure, sealing ring and bobble butt on the fixing base allow the medium to get into, prevent the medium outflow, and the medium backward flow of effectual retaining valve intracavity, the centrifugal pump restart practicality of being convenient for, simple structure, the operation is reliable, has saved the manufacturing cost of enterprise.

2. The utility model discloses in, the first pump body has the internal thread, has the external screw thread on the second pump body and the third pump body and closes with the first pump body soon and be connected for this centrifugal pump is convenient for install and demolishs, has improved the packaging efficiency of production, simultaneously, is convenient for maintain and maintain.

Drawings

Fig. 1 shows a schematic view of a front view internal cross-sectional structure provided according to an embodiment of the present invention;

fig. 2 shows a schematic front view structure diagram provided according to an embodiment of the present invention;

illustration of the drawings:

1. a first pump body; 2. a second pump body; 3. a third pump body; 301. a cylindrical portion; 4. a shaft lever; 5. an impeller; 6. an outlet; 7. a settling tank; 8. a bolt; 9. a fixed seat; 10. a screw; 11. a seal ring; 12. a pellet; 13. a columnar groove; 14. a rod member; 15. a limiting column; 16. a stud; 17. a nut; 18. a pump chamber; 19. and (4) an inlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a centrifugal pump with a re-suction structure comprises a first pump body 1, a second pump body 2 and a third pump body 3, wherein the first pump body 1 is a cylindrical component with internal threads, a precipitation tank 7 and an outlet 6 are arranged on the first pump body, the second pump body 2 and the third pump body 3 are connected to two sides of the first pump body 1 in a screwing mode, a pump cavity 18 is formed inside the first pump body, a shaft lever 4 is arranged in the center of the second pump body 2, an impeller 5 positioned inside the pump cavity 18 is fixed to the end of the shaft lever 4, the shaft lever 4 and the second pump body 2 are sealed, a cylindrical part 301 is arranged on the third pump body 3, a cylindrical fixing seat 9 is inserted into one end, far away from the impeller 5, of the cylindrical fixing seat 301, a sealing ring 11 is fixedly connected to the inside of the fixing seat 9 through a screw 10, a stud 16 is connected to the side wall, close to the impeller 5, of the fixing seat 9 in a screwing mode, and a rod piece 14 is fixed to the end of the stud 16 through a nut 17, the central point of the rod member 14 is fixed with a limit column 15 inserted into the fixing seat 9, the limit column 15 is sleeved with a small ball 12 abutted against the sealing ring 11, and the small ball 12 can be made of aluminum materials because the small ball 12 is made of lighter materials and can not react with gasoline and diesel oil when the medium is gasoline and diesel oil.

Specifically, as shown in fig. 1, the bottom end of the settling tank 7 is provided with a bolt 8 screwed with the first pump body 1, the settling tank 7 is used for settling solid particles, and the bolt 8 is screwed down to remove sediments.

Specifically, as shown in fig. 1, the cylindrical groove 13 that does not completely run through is opened on the pellet 12, the limiting column 15 is inserted in the cylindrical groove 13, the aperture of the cylindrical groove 13 is larger than the diameter of the limiting column 15, the pellet 12 cannot be separated from the fixing seat 9 under the limiting action of the limiting column 15, and meanwhile, in the medium backflow process, the pellet 12 can move along with the medium and abut against the sealing ring 11.

Specifically, as shown in fig. 1, the fixing seat 9 is a cylindrical member, and has a folded edge that is engaged with the third pump body 3, the fixing seat 9 has an inlet 19, the folded edge is connected with the third pump body 3 for sealing, an annular sealing member is disposed between the folded edge and the third pump body 3, and when the third pump body 3 is connected with a pipeline, the pipeline and the third pump body 3 clamp the fixing seat 9 tightly.

Specifically, as shown in fig. 1, the inner side wall of the sealing ring 11 abuts against the small ball 12, the inside of the sealing ring 11 is in a gradually expanding shape, and the inside of the sealing ring 11 is in a gradually expanding shape, so that under the action of siphoning of media, the small ball 12 is tightly abutted against the sealing ring 11, and the media in the pipeline connecting the pump chamber 18 with the centrifugal pump and the inlet 19 cannot flow back to the original storage position due to siphoning.

Specifically, as shown in fig. 1, the inlet 19 is a cylindrical fixing seat 9, a circular hole is formed in the bottom of the cylinder, the sealing ring 11 is fixed inside the fixing seat 9 close to the inlet 19, a section of the inside of the fixing seat 9 outside the sealing ring 11 is in a gradually expanding shape, the inlet 19 is an inlet of a medium, and a section of the inside of the fixing seat 9 is in a gradually expanding shape, so that the medium can flow into the pump cavity 18 from a gap formed between the small ball 12 and the fixing seat 9.

The working principle is as follows: when the centrifugal pump is started again, the medium is directly conveyed out, connection between the flow-cutoff process and the re-suction process is realized, and the running reliability of the centrifugal pump is enhanced.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A centrifugal pump with a re-suction structure comprises a first pump body (1), a second pump body (2) and a third pump body (3), and is characterized in that the first pump body (1) is a cylindrical component with internal threads, a settling tank (7) and an outlet (6) are arranged on the first pump body, the second pump body (2) and the third pump body (3) are connected to two sides of the first pump body (1) in a screwing mode, a pump cavity (18) is formed in the second pump body, a shaft lever (4) is arranged in the center of the second pump body (2), an impeller (5) located in the pump cavity (18) is fixed to the end of the shaft lever (4), a cylindrical fixing seat (9) is arranged on the third pump body (3) in an inserting mode, one end, far away from the impeller (5), of the cylindrical fixing seat (301), and a sealing ring (11) is fixedly connected to the inside of the fixing seat (9) through a screw (10), fixing base (9) are close to on the lateral wall of impeller (5) and close soon and are connected with stud (16), and the end of stud (16) is fixed with member (14) through nut (17), the central point of member (14) puts and is fixed with spacing post (15) of inserting in fixing base (9), the cover is equipped with bobble (12) with sealing ring (11) butt on spacing post (15).

2. A centrifugal pump with a suck-back arrangement according to claim 1, characterized in that the bottom end of the settling tank (7) has a bolt (8) screwed to the first pump body (1).

3. The centrifugal pump with the suck-back structure as set forth in claim 1, wherein said small ball (12) is provided with a cylindrical groove (13) which is not completely penetrated, said limit post (15) is inserted into the cylindrical groove (13), and the diameter of the cylindrical groove (13) is larger than the diameter of the limit post (15).

4. A centrifugal pump with a suck-back structure according to claim 1, characterized in that the fixing seat (9) is a cylindrical member and has a folded edge for engaging with the third pump body (3), and the fixing seat (9) has an inlet (19).

5. A centrifugal pump having a suck-back structure according to claim 1, wherein the inner side wall of the seal ring (11) abuts against the small ball (12), and the inside of the seal ring (11) is divergent.

6. The centrifugal pump with the double suction structure as claimed in claim 4, wherein the fixing seat (9) with the cylindrical inlet (19) is provided with a circular hole at the bottom of the cylinder, the sealing ring (11) is fixed inside the fixing seat (9) close to the inlet (19), and a section of the inside of the fixing seat (9) located outside the sealing ring (11) is in a gradually expanding shape.