CN215805141U

CN215805141U - Eccentric wear prevention torque internal conduction device for rod pipe of screw pump

Info

Publication number: CN215805141U
Application number: CN202022650802.0U
Authority: CN
Inventors: 裴红昌; 崔立伟; 张晓飞
Original assignee: Beijing Guanghui Energy Technology Co ltd
Current assignee: Beijing Guanghui Energy Technology Co ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2022-02-11
Anticipated expiration: 2030-11-16

Abstract

The utility model relates to the technical field of screw pumps, in particular to an eccentric wear prevention torque internal transmission device for a rod pipe for a screw pump, which comprises a male end buckle adapter, an internal transmission main shaft, a centering block, a universal shaft head assembly, an internal transmission barrel and a female end buckle adapter of the screw pump rod; the universal shaft head assembly is arranged in a ball head inner cavity of the inner conduction main shaft; the universal shaft head assembly and the inner conduction main shaft are both arranged in the inner conduction barrel; the righting block is arranged outside the inner conduction main shaft; the male end change buckle connector and the female end change buckle connector are respectively connected with one end of the inner conduction main shaft, and meanwhile the other ends of the male end change buckle connector and the female end change buckle connector are respectively connected with the sucker rods of corresponding models.

Description

Eccentric wear prevention torque internal conduction device for rod pipe of screw pump

Technical Field

The utility model relates to the technical field of screw pumps, in particular to an eccentric wear prevention torque internal conduction device for a rod pipe of a screw pump.

Background

A screw pump is a positive displacement rotary pump which sucks and discharges a liquid by a change in the volume of a sealed chamber formed by a screw and a liner. The screw pumps are divided into single screw pumps, double, triple and quintuple screw pumps according to the number of screws. When the screw pump works, liquid enters a sealing answer space surrounded by the threads and the pump return shell after being sucked, and when the driving screw rotates, the sealing volume of the screw pump improves the pressure of the screw pump under the extrusion of the threads and moves along the axial direction. Since the screw rotates at a constant speed, the outflow rate of the liquid is also uniform.

Due to the intermeshing of the screws and the close fit of the screws with the inner wall of the liner, one or more sealed spaces are defined between the suction port and the discharge port of the pump. These sealed spaces are formed continuously at the suction end of the pump as the screw is rotated and engaged, and the liquid in the suction chamber is sealed therein and continuously pushed from the suction chamber to the discharge end in the axial direction of the screw, and the liquid sealed in each space is continuously discharged.

The traditional screw pump has the following problems in use: when the rod pipe of the traditional screw pump is used, the eccentric wear phenomenon of the rod pipe is easy to occur, and finally the service life of the screw pump is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an eccentric wear prevention torque internal conduction device for a rod pipe of a screw pump, aiming at the defects and shortcomings of the prior art.

The utility model relates to an eccentric wear prevention torque internal transmission device for a rod pipe of a screw pump, which comprises a male end buckle adapter, an internal transmission main shaft, a centering block, a universal shaft head assembly, an internal transmission cylinder and a female end buckle adapter of the screw pump rod;

the universal shaft head assembly is arranged in a ball head inner cavity of the inner conduction main shaft;

the universal shaft head assembly and the inner conduction main shaft are both arranged in the inner conduction barrel; the centralizing block is arranged outside the main transmission shaft;

the male end buckle changing connector and the female end buckle changing connector are respectively connected with one end of the inner conduction main shaft, and meanwhile the other ends of the male end buckle changing connector and the female end buckle changing connector are respectively connected with a sucker rod of the screw pump.

Furthermore, the universal spindle head assembly and the inner conduction barrel are fixed into a whole to form a combined body.

Further, both sides of the combined body are sealed by sealing glands.

After adopting the structure, the utility model has the beneficial effects that: the rod pipe eccentric wear prevention torque internal conduction device for the screw pump can prolong the fatigue time of the sucker rod in a screw pump well in the using process, solves the problems that the sucker rod is broken and takes off and the rod pipe is eccentric wear due to the action of bending moment, and can prolong the period of underground operation.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, and are not to be considered limiting of the utility model, in which:

FIG. 1 is a schematic structural view of the present invention;

description of reference numerals:

1-a male end buckle-changing joint of the sucker rod; 2-internal conductive main shaft; 3-a righting block; 4-universal spindle nose assembly; 5-inner conductive cylinder; 6-female end buckle changing joint.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1, the eccentric wear prevention torque internal transmission device for a rod tube of a screw pump according to the present embodiment includes a male-end buckle adapter 1, an internal transmission spindle 2, a centering block 3, a universal spindle head assembly 4, an internal transmission cylinder 5, and a female-end buckle adapter 6 of the screw pump rod;

the universal spindle head assembly 4 is arranged in a ball head inner cavity of the inner conduction spindle 2;

the universal shaft head assembly 4 and the inner conduction main shaft 2 are both arranged in the inner conduction cylinder body 5; the centering block 3 is arranged outside the inner conduction main shaft 2 to prevent the inner conduction main shaft from contacting with the inner wall of the oil pipe;

and the male end buckle changing joint 1 and the female end buckle changing joint 6 are respectively connected with one end of the inner conduction main shaft 2, and meanwhile, the other ends of the male end buckle changing joint 1 and the female end buckle changing joint 6 are respectively connected with the pumping rods of screw pumps of corresponding models.

Further, the universal spindle head assembly 4 and the inner conduction cylinder 5 are fixed into a whole to form a combined body.

Further, both sides of the combined body are sealed by sealing glands.

The working principle of the utility model is as follows:

the rod pipe eccentric wear prevention torque inner conduction device for the screw pump is suitable for the inclined section parts of a directional well and a horizontal well, the centralizer is in contact with the inner wall of an oil pipe of a shaft, other parts of the efficient eccentric wear prevention sucker rod guider are not in contact with the inner wall of the oil pipe, meanwhile, the torque of the sucker rod is conducted through the inner structure of the device, the inner conduction barrel and the inner wall of the oil pipe are in a relatively static state, and therefore energy loss and abrasion of the inner wall of the oil pipe are ingeniously avoided.

In the design, the universal ball head assembly is arranged in the inner conduction main shaft ball head shell, the stress point of the universal ball head assembly is always in the center of a sphere due to the spherical structure, the ball head joint bears tension or pressure, and the universal ball head assembly does not influence torque or pressure transmission after the angle is deflected.

The eccentric wear prevention torque inner conduction device for the rod pipe for the screw pump is forged by alloy steel, can axially rotate for 360 degrees, and can axially swing for 0-7 degrees.

In the design, the guide shaft transmits the torque of the sucker rod through the spherical hinge structure linkage positioning body, and the relative sliding friction between the sucker rod and the inner wall of the oil pipe is converted into the transmission inside the guide device. All parts are formed by upsetting, the tensile and torsional properties are about 2-3 times of those of the sucker rod of the same grade, and the sucker rod has certain corrosion resistance.

Therefore, the eccentric wear prevention torque inner conduction device for the rod pipe for the screw pump can greatly prolong the service life of the sucker rod in the screw pump well, solves the problem that the sucker rod is broken and separated due to the action of bending moment, greatly reduces eccentric wear of the rod pipe, and can prolong the underground operation period.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The eccentric wear prevention torque internal conduction device for the rod pipe of the screw pump is characterized by comprising a male end buckle (1), an internal conduction main shaft (2), a centering block (3), a universal shaft head assembly (4), an internal conduction cylinder (5) and a female end buckle (6) of the screw pump rod; the universal shaft head assembly (4) is arranged in a ball head inner cavity of the inner conduction main shaft (2); the universal shaft head assembly (4) and the inner conduction main shaft (2) are both arranged in the inner conduction cylinder body (5); the centralizing block (3) is arranged outside the inner conduction main shaft (2); and the male end buckle changing connector (1) and the female end buckle changing connector (6) are respectively connected with one end of the inner conduction main shaft (2), and meanwhile, the other ends of the male end buckle changing connector (1) and the female end buckle changing connector (6) are respectively connected with a sucker rod of the screw pump.

2. The rod tube eccentric wear prevention torque internal conduction device for the screw pump according to claim 1, characterized in that: the universal shaft head assembly (4) and the inner conduction cylinder body (5) are fixed into a whole to form a combined body.

3. The rod tube eccentric wear prevention torque internal conduction device for the screw pump according to claim 2, characterized in that: the two sides of the combination body are sealed by sealing glands.