CN215333345U

CN215333345U - Reciprocating oil-well pump plunger sealing device

Info

Publication number: CN215333345U
Application number: CN202121484743.2U
Authority: CN
Inventors: 吴成明
Original assignee: Zhuhai Weida Precision Technology Co ltd
Current assignee: Zhuhai Weida Precision Technology Co ltd
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2021-12-28
Anticipated expiration: 2031-07-01

Abstract

The utility model provides a reciprocating oil well pump plunger sealing device which comprises a sleeve, wherein an oil outlet is formed in the upper end of the sleeve, an oil inlet joint is connected to the lower end of the sleeve, an oil inlet is formed in the lower end face of the sleeve, a suction valve is arranged at the upper end of the oil inlet and positioned in the sleeve, a pump barrel is connected to the inner wall of the sleeve, an oil guide valve is arranged at the lower end of the inner wall of the pump barrel, a sucker rod is arranged at the upper end of the pump barrel, a plunger is connected to the lower end of the sucker rod, an oil guide pad is connected to the lower end of the plunger, and the sucker rod penetrates through the inner wall of the upper end of the sleeve and extends to the outside.

Description

Reciprocating oil-well pump plunger sealing device

Technical Field

The utility model mainly relates to the technical field of reciprocating oil well pumps, in particular to a plunger sealing device of a reciprocating oil well pump.

Background

The sealing device of the present oil field underground reciprocating oil well pump usually adopts filling materials and various sealing rings for sealing, the gap of the oil well pump is not changed no matter under any working state, in order to ensure the sealing effect and improve the pump efficiency, the gap is always positioned at the minimum, after the gap is overlarge in the conventional sealing mode, the leakage is enlarged, the pump efficiency is greatly reduced, the leakage of the gap is small, but the friction resistance is greatly increased, and the driving power is also increased. However, the long-term use causes the plunger and the pump cylinder to be worn, so that the service life of the device is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The utility model mainly provides a reciprocating oil well pump plunger sealing device which is used for solving the technical problems in the background technology.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model discloses a reciprocating oil well pump plunger sealing device, which comprises a sleeve, wherein an oil outlet is formed in the upper end of the sleeve, the lower end of the sleeve is connected with an oil inlet joint, an oil inlet is formed in the lower end face of the sleeve, a suction valve is arranged at the upper end of the oil inlet and positioned inside the sleeve, a pump barrel is connected to the inner wall of the sleeve, an oil guide valve is arranged at the lower end of the inner wall of the pump barrel, a sucker rod is arranged at the upper end of the pump barrel, a plunger is connected to the lower end of the sucker rod, an oil guide pad is connected to the lower end of the plunger, and the sucker rod penetrates through the inner wall of the upper end of the sleeve and extends to the outside.

Furthermore, the upper end of the pump barrel is connected with a second arc-shaped sleeve, and the design is convenient for improving the sealing performance of the pump barrel.

Furthermore, the upper end of the second arc-shaped sleeve is symmetrically connected with a first arc-shaped sleeve, the first arc-shaped sleeve is in contact with the end with the smaller opening diameter of the second arc-shaped sleeve, and the oil guide pad slides into the pump cylinder when moving downwards.

Further, the cross section of the oil guide pad is in a semi-arc shape, and the oil guide pad is convenient to contact with the first arc-shaped sleeve and the second arc-shaped sleeve.

Furthermore, the oil guide pad is made of an elastic material, and the design is convenient to change according to the change of the aperture sizes of the first arc-shaped sleeve and the second arc-shaped sleeve.

Furthermore, the outer wall of the oil inlet joint is provided with a plurality of oil guide ports, the inner wall of the oil inlet joint is connected with a filter screen, and oil residues are conveniently filtered through the design.

Compared with the prior art, the utility model has the beneficial effects that:

the first arc-shaped sleeve and the second arc-shaped sleeve are matched with the oil guide pad, so that the sealing performance of the sleeve is improved conveniently, and further, the oil guide pad arranged at the lower end of the plunger prevents the oil guide pad from being in contact with the inner wall of the pump cylinder to cause abrasion by utilizing the elasticity of the oil guide pad, so that the service life is shortened.

The present invention will be explained in detail below with reference to the drawings and specific embodiments.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a schematic view of the structure of the sucker rod of the present invention in a descending state;

FIG. 3 is a schematic view of the state structure of the sucker rod of the present invention in ascending;

fig. 4 is a schematic cross-sectional structural view of the oil inlet joint of the present invention.

In the figure: 1. a sleeve; 2. a sucker rod; 3. an oil inlet joint; 4. a suction valve; 5. an oil guide valve; 11. an oil outlet; 12. a first arcuate sleeve; 13. a second arc-shaped sleeve; 14. a pump barrel; 15. an oil inlet; 21. a plunger; 32. filtering with a screen; 33. an oil guide port; 211. and an oil guide pad.

Detailed Description

In order to facilitate an understanding of the utility model, the utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the utility model are shown, but which may be embodied in different forms and not limited to the embodiments described herein, but which are provided so as to provide a more thorough and complete disclosure of the utility model.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the knowledge of the terms used herein in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring now to fig. 1-4, a reciprocating oil well pump plunger 21 seal assembly, comprising a barrel 1, an oil outlet 11 is arranged at the upper end of the sleeve 1, an oil inlet joint 3 is connected at the lower end of the sleeve 1, an oil inlet 15 is arranged on the lower end surface of the sleeve 1, a suction valve 4 is arranged at the upper end of the oil inlet 15, the suction valve 4 is positioned in the sleeve 1, the inner wall of the sleeve 1 is connected with a pump cylinder 14, the lower end of the inner wall of the pump cylinder 14 is provided with an oil guide valve 5, the upper end of the pump cylinder 14 is provided with a sucker rod 2, the lower end of the sucker rod 2 is connected with a plunger 21, the lower end of the plunger 21 is connected with an oil guide pad 211, and the sucker rod 2 penetrates through the inner wall of the upper end of the sleeve 1 and extends to the outside.

Please refer to fig. 1-4 again, the upper end of the pump barrel 14 is connected with a second arc-shaped sleeve 13, the upper end of the second arc-shaped sleeve 13 is symmetrically connected with a first arc-shaped sleeve 12, the first arc-shaped sleeve 12 contacts with the end with the smaller caliber of the second arc-shaped sleeve 13, the cross section of the oil guide pad 211 is semi-arc-shaped, the oil guide pad 211 is made of an elastic material, the outer wall of the oil inlet joint 3 is provided with a plurality of oil guide ports 33, the inner wall of the oil inlet joint 3 is connected with a filter screen 32, the sealing of the pump barrel 14 is improved, and oil residue can be filtered conveniently through the arranged oil inlet joint 3.

The specific operation mode of the utility model is as follows:

when the oil pumping device is used, oil is firstly led into the sleeve 1 through the oil inlet connector 3, oil residues are filtered by the aid of the arranged oil guide port 33 and the filter screen 32 in the oil guiding process, when the oil enters the sleeve 1, the suction valve 4 is driven to move upwards to enter the sleeve 1, then the oil pumping rod 2 descends to enable the plunger 21 arranged at the lower end of the oil pumping rod 2 to be positioned in the pump cylinder 14, when the oil pumping rod 2 descends, the oil guide pad 211 arranged on the plunger 21 is in contact with the first arc-shaped sleeve 12 and the second arc-shaped sleeve 13, the oil guide pad 211 changes according to the change of the calibers of the first arc-shaped sleeve 12 and the second arc-shaped sleeve 13, when the oil pumping rod 2 ascends, the oil guide valve 5 is driven to move upwards to enable the oil to enter the pump cylinder 14 and be led out through the oil outlet 11, so that the oil guide pad 211 arranged at the lower end of the plunger 21 is prevented from being in contact with the inner wall of the pump cylinder 14 due to the elasticity of the oil guide pad 211, resulting in a reduced service life.

The utility model is described above with reference to the accompanying drawings, it is obvious that the utility model is not limited to the above-described embodiments, and it is within the scope of the utility model to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.

Claims

1. The utility model provides a reciprocating type oil pump plunger (21) sealing device, includes sleeve (1), its characterized in that, sleeve (1) upper end is equipped with oil-out (11), sleeve (1) lower extreme is connected with oil feed joint (3), the terminal surface is equipped with oil inlet (15) under sleeve (1), oil inlet (15) upper end is equipped with suction valve (4), suction valve (4) are located inside sleeve (1), sleeve (1) inner wall is connected with pump barrel (14), pump barrel (14) inner wall lower extreme is equipped with leads oil valve (5), pump barrel (14) upper end is equipped with sucker rod (2), sucker rod (2) lower extreme is connected with plunger (21), plunger (21) lower extreme is connected with leads oil pad (211), sucker rod (2) run through sleeve (1) upper end inner wall and extend to the outside.

2. The sealing device of the plunger (21) of the reciprocating oil well pump as claimed in claim 1, wherein the second arc-shaped sleeve (13) is connected to the upper end of the pump barrel (14).

3. The sealing device of the reciprocating oil well pump plunger (21) as claimed in claim 2, characterized in that the upper end of the second arc-shaped sleeve (13) is symmetrically connected with a first arc-shaped sleeve (12), and the first arc-shaped sleeve (12) is in contact with the end with the smaller caliber of the second arc-shaped sleeve (13).

4. The sealing device of the plunger (21) of the reciprocating oil well pump as claimed in claim 1, wherein the cross section of the oil guiding pad (211) is a half arc shape.

5. The sealing device for a reciprocating oil well pump plunger (21) as claimed in claim 4, wherein said oil guiding gasket (211) is embodied as an elastic material.

6. The sealing device of the reciprocating oil well pump plunger (21) as claimed in claim 1, wherein the outer wall of the oil inlet joint (3) is provided with a plurality of oil guide ports (33), and the inner wall of the oil inlet joint (3) is connected with a filter screen (32).