CN215927751U

CN215927751U - Multi-section plunger

Info

Publication number: CN215927751U
Application number: CN202122449665.9U
Authority: CN
Inventors: 应浩斌
Original assignee: Jiangsu Laiherun Roll Technology Co ltd
Current assignee: Jiangsu Laiherun Roll Technology Co ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-03-01
Anticipated expiration: 2031-10-11

Abstract

The utility model discloses a multi-section plunger which comprises an outer sleeve, an inner sleeve and an inner plunger body, wherein the inner plunger body is arranged in the inner sleeve in a penetrating mode, the inner sleeve is arranged in the outer sleeve in a penetrating mode, a cylindrical cavity penetrating through the upper end and the lower end is formed in the middle of the outer sleeve, a first upper convex ring is arranged on the inner wall of the top of the outer sleeve, a cylindrical cavity penetrating through the upper end and the lower end is formed in the inner sleeve, a second upper convex ring is arranged on the inner wall of the upper end of the inner sleeve, a second lower convex ring is arranged on the outer wall of the lower end of the inner sleeve, a limiting block is arranged at the upper end of the inner plunger body, and a third lower convex ring is arranged on the outer wall of the lower end of the inner plunger body. The design is established to multistage cover through the plunger, when guaranteeing that plunger pump volume is unchangeable, has increased the flexible stroke of plunger to it makes the flow control scope of plunger pump bigger to have increased the flow of plunger pump, and multistage formula plunger occupation space is little, the cooperation is inseparable, has practiced thrift the cost of manufacturing.

Description

Multi-section plunger

Technical Field

The utility model relates to the technical field of plunger pump parts, in particular to a multi-section plunger.

Background

The plunger pump belongs to a positive displacement pump and a reciprocating pump. When the plunger pump works, the plunger reciprocates in the plunger cylinder body, so that pressure difference generated by the change of the sealed volume in the plunger cylinder body is caused to convey fluid media to work. The existing plunger is various in types, however, the traditional plunger is simple in structure and single in function, and when a large-flow plunger pump is needed, the traditional plunger often cannot meet the requirement, and at the moment, the plunger pump with a large volume has to be adopted, so that the occupied working space is enlarged, the operation is inconvenient, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: overcomes the deficiencies of the prior art and provides a multi-stage plunger.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a multi-section plunger comprises an outer sleeve, an inner sleeve and an inner plunger body, wherein the inner plunger body is arranged in the inner sleeve in a penetrating manner, the inner sleeve is arranged in the outer sleeve in a penetrating manner, a cylindrical cavity penetrating through the upper end and the lower end is formed in the middle of the outer sleeve, a first upper convex ring is arranged on the inner wall of the top of the outer sleeve, a cylindrical cavity penetrating through the upper end and the lower end is formed in the inner sleeve, a second upper convex ring is arranged on the inner wall of the upper end of the inner sleeve, a second lower convex ring is arranged on the outer wall of the lower end of the inner plunger body, a limiting block is arranged on the upper end of the inner plunger body, a third lower convex ring is arranged on the outer wall of the lower end of the inner plunger body, the inner wall of the first upper convex ring is in sliding sealing fit with the outer wall of the inner sleeve, the outer wall of the second lower convex ring is in sliding sealing fit with the inner wall of the inner plunger body, the outer wall of the third lower convex ring is in sliding sealing fit with the inner wall of the inner sleeve.

Further, the inner wall of the lower end of the outer sleeve is provided with a first lower convex ring, and the outer edge of the bottom end of the second lower convex ring is provided with a ring groove matched with the first lower convex ring.

Furthermore, the upper surface of the limiting block is provided with a connecting column and a connector.

Furthermore, an oil through hole is formed in the middle of the inner plunger body and penetrates through the inner plunger body, the limiting block, the connecting column and the connector.

The utility model has the beneficial effects that: the plunger pump has the advantages of simple structure, reasonable design and simple and convenient operation, and through the multi-section sleeving design of the plunger, the volume of the plunger pump is ensured to be unchanged, and meanwhile, the telescopic stroke of the plunger is increased, so that the flow rate of the plunger pump is increased, the flow rate control range of the plunger pump is larger, the multi-section plunger occupies small space and is tightly matched, the operation space of equipment is reduced, the production and manufacturing cost is saved, and the accurate and reliable action is improved.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a perspective view of the present invention in a stretched state;

FIG. 2 is a cross-sectional view of the present invention;

fig. 3 is a perspective view of the utility model in a compressed state.

In the figure: 1. the plunger piston comprises an outer sleeve, 2. an inner sleeve, 3. an inner plunger piston body, 4. a first upper convex ring, 5. a second upper convex ring, 6. a second lower convex ring, 7. a limiting block, 8. a third lower convex ring, 9. a first lower convex ring, 10. an annular groove, 11. a connecting column, 12. a connecting head and 13. an oil through hole.

Detailed Description

The utility model will now be described in further detail with reference to the drawings and preferred embodiments. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1, a multistage formula plunger that fig. 2 and fig. 3 show, including outer sleeve 1, inner skleeve 2 and the internal plunger body 3, the internal plunger body 3 wears to locate in inner skleeve 2, inner skleeve 2 wears to locate in outer sleeve 1, the cylindrical cavity that runs through upper and lower extreme has been seted up at the middle part of outer skleeve 1, the top inner wall of outer skleeve 1 is provided with first bulge loop 4, inner skleeve 2 has been seted up and has been run through the cylindrical cavity of upper and lower extreme, the upper end inner wall of inner skleeve 2 is equipped with bulge loop 5 on the second, the lower extreme outer wall of inner skleeve 2 is provided with bulge loop 6 under the second, the upper end of the internal plunger body 3 is provided with stopper 7, during the compression, prevent the internal plunger body 3 to inside further compression of inner skleeve 2. The outer wall of the lower end of the inner plunger body 3 is provided with a third lower convex ring 8, the inner wall of the first upper convex ring 4 is in sliding sealing fit with the outer wall of the inner sleeve 2, the outer wall of the second lower convex ring 6 is in sliding sealing fit with the inner wall of the outer sleeve 1, the inner wall of the second upper convex ring 5 is in sliding sealing fit with the outer wall of the inner plunger body 3, and the outer wall of the third lower convex ring 8 is in sliding sealing fit with the inner wall of the inner sleeve 2. When the plunger is in a compressed state in the plunger pump, the lower surfaces of the outer sleeve 1, the inner sleeve 2 and the inner plunger body 3 are positioned on the same plane; when the inner plunger body 3 is in a stretching state, the third lower convex ring of the inner plunger body 3 is abutted with the second upper convex ring 5 of the inner sleeve 2 to limit the inner plunger body 3 to be separated from the inner sleeve 2, and meanwhile, the second lower convex ring 6 of the inner sleeve 2 is abutted with the first upper convex ring 4 of the outer sleeve 1 to prevent the inner sleeve 2 from being separated from the outer sleeve 1.

The lower extreme inner wall of outer sleeve 1 is provided with first bulge loop 9 down, and the bottom outward flange of second bulge loop 6 is seted up with first bulge loop 9 complex annular 10 down, and when the plunger was in compression state, annular 10 on the second bulge loop 6 will be inconsistent with first bulge loop 9 down, plays further limiting displacement to inner sleeve 2.

The upper surface of the limiting block 7 is provided with a connecting column 11 and a connector 12 which are used for being connected with a driving mechanism.

An oil through hole 13 is formed in the middle of the inner plunger body 3, and the oil through hole 13 penetrates through the inner plunger body 3, the limiting block 7, the connecting column 11 and the connector 12.

When the plunger pump works, the multi-section compression is adopted, and the stroke of compression operation is increased under the condition that the volume of the plunger pump does not need to be increased, so that the flow of the plunger pump is increased, the structure is stable and ingenious, and the operation is simple and convenient.

While particular embodiments of the present invention have been described in the foregoing specification, the present invention is not limited to the specific embodiments, and modifications and variations of the foregoing detailed description can be made by those skilled in the art without departing from the spirit and scope of the utility model.

Claims

1. A multi-section plunger, comprising: comprises an outer sleeve (1), an inner sleeve (2) and an inner plunger body (3), wherein the inner plunger body (3) is arranged in the inner sleeve (2) in a penetrating manner, the inner sleeve (2) is arranged in the outer sleeve (1) in a penetrating manner, a cylindrical cavity penetrating through the upper end and the lower end is formed in the middle of the outer sleeve (1), a first upper convex ring (4) is arranged on the inner wall of the top of the outer sleeve (1), a cylindrical cavity penetrating through the upper end and the lower end is formed in the inner sleeve (2), a second upper convex ring (5) is arranged on the inner wall of the upper end of the inner sleeve (2), a second lower convex ring (6) is arranged on the outer wall of the lower end of the inner sleeve (2), a limit block (7) is arranged on the upper end of the inner plunger body (3), a third lower convex ring (8) is arranged on the outer wall of the lower end of the inner plunger body (3), and the inner wall of the first upper convex ring (4) is matched with the outer wall of the inner sleeve (2) in a sliding sealing manner, the outer wall of the second lower convex ring (6) is in sliding sealing fit with the inner wall of the outer sleeve (1), the inner wall of the second upper convex ring (5) is in sliding sealing fit with the outer wall of the inner plunger body (3), and the outer wall of the third lower convex ring (8) is in sliding sealing fit with the inner wall of the inner sleeve (2).

2. The multi-section plunger of claim 1, wherein: the inner wall of the lower end of the outer sleeve (1) is provided with a first lower convex ring (9), and the outer edge of the bottom end of the second lower convex ring (6) is provided with a ring groove (10) matched with the first lower convex ring (9).

3. The multi-section plunger of claim 1, wherein: the upper surface of the limiting block (7) is provided with a connecting column (11) and a connector (12).

4. The multi-section plunger of claim 1, wherein: an oil through hole (13) is formed in the middle of the inner plunger body (3), and the oil through hole (13) penetrates through the inner plunger body (3), the limiting block (7), the connecting column (11) and the connector (12).