CN219605549U - Eccentric rotary multiphase oil-gas mixing delivery pump - Google Patents

Abstract

The utility model discloses an eccentric rotary multiphase oil-gas mixing and conveying pump, which adopts a design that a bearing chamber is completely separated from a medium cavity, an eccentric rotor is arranged in a pump body, the eccentric rotor is arranged on a shaft and is driven by a key, the shaft is concentric with a shell, a crescent cavity is formed in the pump body by the rotor, and a separation plate passes through the shell to be tightly contacted with the rotating eccentric rotor to form an elastic sealing body, so that a low-pressure cavity and a high-pressure cavity are formed; and the eccentric rotor sleeve and the shell form a sealing body along the circumferential direction, so that the condition that the low-pressure cavity and the high-pressure cavity are internally leaked is avoided. Solves the problem that crude oil, natural gas, water and various viscous substances are difficult to realize mixed transportation of a single pipeline; the oil well can be realized without emission and pollution; the mechanical structure is simple, the principle is correct, the manufacture and the maintenance are easy, the operation speed is low, no noise and no pollution can be realized, the random variable operation can be realized, and the device can be used for a long time in a severe environment.

Description

Eccentric rotary multiphase oil-gas mixing delivery pump

Technical Field

The utility model belongs to power machinery, relates to a conveying pump, and in particular relates to an eccentric rotary multiphase oil-gas mixing conveying pump.

Background

At present, in the petroleum industry of China, crude oil, natural gas, water, sediment, floccules and various sticky substances are difficult to realize multiphase mixed transportation of a single pipeline, so that serious environmental pollution and social resource waste formed by repeated construction, repeated investment and casing gas emission are caused.

In order to solve multiphase mixed transportation of petroleum and natural gas production, improve the utilization rate of assets, reduce construction investment, realize oil well casing gas recovery, avoid atmospheric pollution and save social resources, search a new multiphase mixed transportation device, and are one of the subjects of attention of the technicians in the field.

In the prior art, a rotor shaft of the multiphase oil-gas mixing and conveying pump is eccentric, a bearing is arranged between the rotor shaft and a rotor sleeve, and a low-pressure cavity and a high-pressure cavity are formed by supporting the bearing and rotating the multiphase oil-gas mixing and conveying pump; however, as the bearing is impacted by the eccentric rotor, in the use process of the pump, corrosive media are easy to enter the bearing cavity due to the fact that the sealing is easy to fail, and the lubrication condition of the bearing is poor, the bearing is easy to damage, and the service life is shortest even less than one month.

In the prior art, the rotor of the multiphase oil-gas mixing delivery pump is hinged with the isolation plate, and the rotor performs eccentric rotary swing, so that the structure cannot realize high-speed operation, and the eccentric quantity is smaller, so that the pump is larger.

Disclosure of Invention

Aiming at the technical problems or defects in the prior art, the utility model aims to provide an eccentric rotary multiphase oil-gas mixing and conveying pump, which can realize the situation that the pump is not damaged in the use process and ensure that the pump can always operate under high performance.

In order to achieve the above task, the present utility model adopts the following technical solutions:

an eccentric rotary multiphase oil-gas mixing and conveying pump comprises a pump body and is characterized in that an eccentric rotor is arranged in the pump body and is arranged on a shaft, the eccentric rotor is driven by a flat key and is fastened with the eccentric rotor by a nut, the shaft is concentric with an inner hole of the pump body, so that a crescent cavity is formed by the pump body and the eccentric rotor, and the eccentric rotor is tangent with the inner wall of the pump body by 360 degrees;

the top in the pump body is provided with a separation plate, the separation plate passes through the square groove of the pump body to be tangent with the eccentric rotor, a medium cavity in the pump body is divided into a high-pressure cavity and a low-pressure cavity, and an upper sealing cover arranged on the pump body separates the medium cavity from the outside; the upper sealing cover is provided with a first pipe joint which is sequentially connected with a first oil pipe, a one-way valve, a second oil pipe and a second pipe joint and finally connected with the outlet end of the pump body; a spring is arranged between the upper sealing cover and the isolation plate, and the isolation plate is always preloaded by the spring when the eccentric rotor moves in the pump body in a rotating way, so that the isolation plate and the eccentric rotor are always tangential in a certain pressure of the pump body, and the isolation plate, the eccentric rotor and the pump body are sealed; the pressure release groove is arranged on the isolation plate, the pressure release groove faces the outlet end during installation, when a certain pressure is formed at the inlet and the outlet of the pump body, a medium at the outlet end enters the top of the pump body through the second connector, the second oil pipe, the one-way valve, the first oil pipe, the first connector and the upper sealing cover, a certain pressure is formed on the isolation plate in the radial direction, and the isolation plate is always contacted with the eccentric rotor in the process of continuously rising the pressure difference at the inlet and the outlet of the pump body.

The utility model is characterized in that a front flange is arranged at the shaft extending end at one side of the pump body, a rear flange is arranged at the shaft extending end at the other side of the pump body, gaps are reserved between the front flange and the rear flange and the two ends of the eccentric rotor, sealing and sealing glands are arranged at the positions of the front flange and the rear flange and the rotating position of the shaft, a medium cavity with pressure is isolated from the outside, a bearing seat, a bearing and a front sealing cover are arranged on the front flange, and likewise, the bearing seat, the bearing and the rear sealing cover are arranged on the rear flange, and the bearing and the medium cavity are independently arranged, so that the medium cannot pollute the bearing when the sealing fails or a problem occurs.

Specifically, a plurality of round holes or special-shaped holes are formed in the eccentric rotor.

The eccentric rotary multiphase oil-gas mixing and conveying pump adopts the design that the bearing chamber is completely separated from the medium cavity, and the eccentric rotor can dynamically divide the inner cavity of the shell into a high-pressure cavity and a low-pressure cavity so as to achieve the purposes of regulating the pressure and the flow of the input end and the output end. The rotor makes eccentric rotation movement in the shell, and in the process of the movement of the rotor, the rotor is always in line contact with the inner wall of the shell at any time, so that the conversion process of the size of the cavity and the exchange process of media in the cavity are completed. The bearing cavity is completely separated from the medium cavity, so that leakage caused by sealing failure or other reasons does not pollute the bearing cavity, and the problem that crude oil, natural gas, water and various viscous substances are difficult to realize mixed transportation of a single pipeline is solved; the oil well can be realized without emission and pollution; the mechanical structure is simple, the manufacturing and the maintenance are easy, the noise is low, the pollution is avoided, and the device can be used in a severe environment for a long time.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an eccentric rotary multiphase oil-gas mixing transfer pump of the present utility model;

FIG. 2 is a cross-sectional view of a pump volume;

FIG. 3 is a schematic illustration of an eccentric rotor;

the marks in the figures represent: 1. the sealing device comprises a shaft, 2, a front sealing cover, 3, a bearing, 4, a bearing seat, 5, a front flange, 6, a sealing gland, 7, a seal, 8, a pump body, 9, a separation plate, 10, an eccentric rotor, 11, a spring, 12, an upper sealing cover, 13, a nut, 14, a rear flange, 15, a rear sealing cover, 16, a flat key, 17, a first pipe joint, 18, a first oil pipe, 19, a one-way valve, 20, a second oil pipe, 21 and a second pipe joint.

The utility model is described in further detail below with reference to the drawings and examples.

Detailed Description

Referring to fig. 1-3, the present embodiment provides an eccentric rotary multiphase oil-gas mixing pump, which comprises a pump body 8, wherein an eccentric rotor 10 is arranged in the pump body 8, the eccentric rotor 10 is mounted on a shaft 1, and is driven by a flat key 16, the shaft 1 and the eccentric rotor 10 are fastened by a nut 13, the shaft 1 and an inner hole of the pump body 8 are concentric, so that the pump body 8 and the eccentric rotor 10 form a crescent cavity, and the eccentric rotor 10 is tangent with the inner wall of the pump body 8 by 360 degrees;

the top in the pump body 8 is provided with a separation plate 9, the separation plate 9 passes through a square groove of the pump body 8 and is tangent to the eccentric rotor 10, a medium cavity in the pump body 8 is divided into a high-pressure cavity and a low-pressure cavity, and an upper sealing cover 12 arranged on the pump body 8 separates the medium cavity from the outside; the upper sealing cover 12 is provided with a first pipe joint 17, and the first pipe joint 17 is sequentially connected with a first oil pipe 18, a one-way valve 19, a second oil pipe 20 and a second pipe joint 21 and finally connected with the outlet end of the pump body 8; a spring 11 is arranged between the upper sealing cover 12 and the isolation plate 9, and the isolation plate 9 is always preloaded by the spring 11 when the eccentric rotor 10 rotates in the pump body 8, so that the isolation plate 9 and the eccentric rotor 10 are always tangent to each other in a certain pressure of the pump body 8, and the isolation plate 9, the eccentric rotor 10 and the pump body 8 are sealed; the pressure release groove is arranged on the isolation plate 9, the pressure release groove faces to the outlet end during installation, when the inlet and outlet of the pump body 8 (the left flange is an inlet and the right flange is an outlet in fig. 2) form certain pressure, the medium at the outlet end enters the top of the pump body 8 through the second pipe joint 21, the second oil pipe 20, the one-way valve 19, the first oil pipe 18, the first pipe joint 17 and the upper sealing cover 12, certain pressure is formed on the isolation plate 9 in the radial direction, and the isolation plate 9 is always contacted with the eccentric rotor 10 in the process of ensuring that the pressure difference at the inlet and outlet ends of the pump body 8 continuously rises.

In this embodiment, the protruding end of the shaft 1 on one side of the pump body 8 is provided with a front flange 5, the protruding end of the other side shaft 1 of the pump body 8 is provided with a rear flange 14, gaps are left between the front flange 5 and the rear flange 14 and the two ends of the eccentric rotor 10, the rotating parts of the front flange 5 and the rear flange 14 and the rotating parts of the shaft 1 are provided with a seal 7 and a seal gland 6, a medium cavity with pressure is isolated from the outside, the front flange 5 is provided with a bearing seat 4, a bearing 3 and a front seal cover 2, the rear flange 14 is provided with a bearing seat 4, a bearing 3 and a rear seal cover 15, the bearing 3 and the medium cavity are separately arranged, and when the seal 7 fails or has a problem, the medium cannot be polluted

The eccentric rotor 10 is provided with a plurality of circular holes or profiled holes (fig. 3). The purpose is firstly to reduce the weight of the eccentric rotor 10, and secondly to be used for static balancing of the eccentric rotor 10.

The eccentric rotary multiphase oil-gas mixing and conveying pump provided by the embodiment adopts a design that a bearing chamber is completely separated from a medium cavity, an eccentric rotor is arranged in a pump body, the eccentric rotor is arranged on a shaft and is driven by a key, the shaft is concentric with a shell, a crescent cavity is formed in the pump body by the rotor, and a separation plate penetrates through the shell to be tightly contacted with the rotating eccentric rotor to form an elastic sealing body, so that a low-pressure cavity and a high-pressure cavity are formed; and the eccentric rotor sleeve and the shell form a sealing body along the circumferential direction, so that the condition that the low-pressure cavity and the high-pressure cavity are internally leaked is avoided. Solves the problem that crude oil, natural gas, water and various viscous substances are difficult to realize mixed transportation of a single pipeline; the oil well can be realized without emission and pollution; the mechanical structure is simple, the principle is correct, the manufacture and the maintenance are easy, the operation speed is low, no noise and no pollution can be realized, the random variable operation can be realized, and the device can be used for a long time in a severe environment.

Claims (3)

1. The eccentric rotary multiphase oil-gas mixing and conveying pump comprises a pump body (8), and is characterized in that an eccentric rotor (10) is arranged in the pump body (8), the eccentric rotor (10) is arranged on a shaft (1) and is driven by a flat key (16), the shaft (1) and the eccentric rotor (10) are fastened by a nut (13), the shaft (1) and an inner hole of the pump body (8) are concentric, so that a crescent cavity is formed between the pump body (8) and the eccentric rotor (10), and the eccentric rotor (10) is tangent with the inner wall of the pump body (8) by 360 degrees;

the top in the pump body (8) is provided with a separation plate (9), the separation plate (9) passes through a square groove of the pump body (8) to be tangent to the eccentric rotor (10), a medium cavity in the pump body (8) is divided into a high-pressure cavity and a low-pressure cavity, and an upper sealing cover (12) arranged on the pump body (8) separates the medium cavity from the outside; the upper sealing cover (12) is provided with a first pipe joint (17), and the first pipe joint (17) is sequentially connected with a first oil pipe (18), a one-way valve (19), a second oil pipe (20) and a second pipe joint (21) and finally connected with the outlet end of the pump body (8); a spring (11) is arranged between the upper sealing cover (12) and the isolation plate (9), the eccentric rotor (10) rotates in the pump body (8), and the spring (11) always gives the isolation plate (9) pretightening force so as to ensure that the isolation plate (9) is always tangent to the eccentric rotor (10) in a certain pressure of the pump body (8), and the isolation plate (9), the eccentric rotor (10) and the pump body (8) are sealed; be provided with the pressure release groove on division board (9), this pressure release groove is towards the exit end during the installation, when pump body (8) import and export and form certain pressure, exit end medium is through second coupling (21), second oil pipe (20), check valve (19), first oil pipe (18), first coupling (17), go up closing cap (12) and get into pump body (8) top, radially form certain pressure to division board (9), ensure pump body (8) import and export the in-process that end pressure differential risees constantly, division board (9) contact with eccentric rotor (10) all the time.

2. The eccentric rotary multiphase oil-gas mixing and conveying pump according to claim 1, characterized in that the front flange (5) is installed at the extending end of the shaft (1) at one side of the pump body (8), the rear flange (14) is installed at the extending end of the other side shaft (1) of the pump body (8), gaps are reserved between the front flange (5) and the rear flange (14) and two ends of the eccentric rotor (10), the sealing (7) and the sealing gland (6) are arranged at the positions of the front flange (5) and the rear flange (14) and the rotating position of the shaft (1), a medium cavity with pressure is isolated from the outside, the bearing seat (4), the bearing (3) and the front sealing cover (2) are arranged on the front flange (5), the bearing seat (4), the bearing (3) and the rear sealing cover (15) are arranged on the rear flange (14), and the bearing (3) and the medium cavity are arranged independently, and when the sealing (7) fails or has a problem, the medium cannot pollute the bearing (3).

3. The eccentric rotary multiphase oil-gas mixing transfer pump of claim 1, characterized in that the eccentric rotor (10) is provided with a plurality of round or profiled holes.