CN214255884U

CN214255884U - Submersible electric plunger pump stator nipple inner lining barrel

Info

Publication number: CN214255884U
Application number: CN202120558327.6U
Authority: CN
Inventors: 冯斗; 冯丹; 张德江; 管浩宇
Original assignee: Shenyang Xincheng Petroleum Machinery Manufacturing Co ltd
Current assignee: Shenyang Xincheng Petroleum Machinery Manufacturing Co ltd
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-09-21
Anticipated expiration: 2031-03-18

Abstract

The utility model discloses an interior bushing barrel of latent oily electric plunger pump stator nipple joint, including stator, inner tube and end cover, on the inner tube was located to the stator cover, the equal butt in both ends of stator had the end cover, offered flutedly on the end cover, and the taper hole has been seted up to one side that the recess is close to the stator, and in the one end of inner tube passed the taper hole and extended to the recess, the port of inner tube was provided with the hem, hem and groove weld. The stainless steel inner cylinder is pressed into the motor stator by using the press machine, so that the stator and the inner cylinder are tightly attached, the two ends of the inner cylinder are flanged by using the die, and the flanged edges are welded on the end cover by using air plasma surfacing equipment, so that the sealing performance of the lining cylinder is improved.

Description

Submersible electric plunger pump stator nipple inner lining barrel

Technical Field

The utility model relates to a linear electric motor device field, more specifically relates to a bore liner in latent oily electric plunger pump stator nipple joint.

Background

Because the submersible electric plunger pump works in a high-temperature and high-pressure environment under an oil well for a long time, the insulation sealing of the stator of the linear motor is very important, the submersible electric plunger pump has the working characteristic of frequent starting, the reversing can generate vibration every time, the welded junction tissue is easy to generate fatigue, the welded junction is cracked, the sealing failure is caused, and well fluid enters the motor to cause insulation breakdown and can not work normally.

SUMMERY OF THE UTILITY MODEL

In order to overcome prior art's defect, the utility model aims to solve the technical problem that a bushing in latent oil electric plunger pump stator nipple joint is proposed, impresses the stainless steel inner tube in the motor stator through using the press for closely laminate between stator and the inner tube, utilize the mould to turn-ups inner tube both ends simultaneously, and utilize air plasma build-up welding equipment to weld the hem on the end cover, improved bushing's sealing performance.

To achieve the purpose, the utility model adopts the following technical proposal: the utility model provides an interior bushing of latent oily electric plunger pump stator nipple joint, includes stator, inner tube and end cover, and on the inner tube was located to the stator cover, there was the end cover at the equal butt in both ends of stator, sets up flutedly on the end cover, and the taper hole has been seted up near the stator to the recess, and in the one end of inner tube passed the taper hole and extended to the recess, the port of inner tube was provided with the hem, hem and groove weld.

In the preferred technical scheme of the utility model, the welding material of the hem is nickel-based alloy powder.

In the preferred technical scheme of the utility model, a side of the end cover far away from the stator is connected with a damping device by screw thread, the damping device comprises an upper cover plate, a lower cover plate, a waterproof breathable film, a rubber support rod, a spring, a shell, a pressing plate, a connecting rod, an air bag and a spring, the upper cover plate is provided with a first through hole, the lower cover plate is provided with a second through hole, the bottom of the upper cover plate is provided with a first boss, the top of the lower cover plate is provided with a second boss, the second boss is provided with a sealing groove which is in splicing fit with the first boss, the waterproof breathable film is arranged in the sealing groove, the upper cover plate is connected with the lower cover plate by the rubber support rod, the lower cover plate is also fixed with more than two shells, the shells are provided with a first cavity in the shells, one end of the connecting rod is fixedly connected with the pressing plate, the pressing plate is arranged in the first cavity, and the other end of the connecting rod penetrates through the top wall of the shells and is fixedly connected with the upper cover plate, the pressing plate is connected with the bottom wall of the first cavity through the air bag, the spring sleeve is arranged on the air bag, and the top wall of the shell is further provided with more than two oil inlet holes.

The utility model discloses in the technical scheme of preferred, first through-hole with all be provided with the internal thread in the second through-hole, the end cover with apron threaded connection down.

The utility model discloses in the technical scheme of preferred, the seal groove bottom is provided with the filling layer.

The utility model has the advantages that:

the utility model provides a pair of oil-submersible electric plunger pump stator nipple joint inside lining section of thick bamboo impresses the stainless steel inner tube in the motor stator through using the press for closely laminate between stator and the inner tube, utilize the mould to weld the inner tube both ends turn-ups simultaneously, and utilize air plasma build-up welding equipment to weld the hem on the end cover, improved inside lining section of thick bamboo's sealing performance.

Drawings

Fig. 1 is a schematic structural diagram of a stator nipple lining barrel of an electric submersible plunger pump according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the shock absorbing device;

figure 3 is a schematic view of the connection of the shock absorbing device to the end cap.

In the figure:

1-stator, 2-inner cylinder, 3-end cover, 4-groove, 5-taper hole, 6-folded edge, 7-upper cover plate, 8-lower cover plate, 9-first boss, 10-second boss, 11-sealing groove, 12-waterproof breathable film, 13-rubber support rod, 14-shell, 15-first cavity, 16-pressing plate, 17-connecting rod, 18-air bag, 19-spring, 20-oil inlet, 21-first through hole, 22-second through hole, 23-internal thread and 24-filling layer.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1, the embodiment provides a lining tube in submersible electric plunger pump stator nipple, including stator 1, inner tube 2 and end cover 3, stator 1 is located on inner tube 2, and the outer surface of inner tube 2 and the laminating of stator 1 internal surface, there are end cover 3 all the butt in both ends of stator 1, set up fluted 4 on the end cover 3, one side that recess 4 is close to stator 1 is equipped with taper hole 5, the one end of inner tube 2 is passed taper hole 5 and is extended to in the recess 4, the port of inner tube 2 is provided with hem 6, hem 6 and recess 4 welding. Stainless steel inner tube 2 is pressed into motor stator 1 by using a press machine, so that stator 1 and inner tube 2 are tightly attached, meanwhile, two ends of inner tube 2 are flanged by using a die, the outer surface of flanged edge 6 is attached to the inner surface of conical hole 5, flanged edge 6 is welded on end cover 3 by using air plasma surfacing equipment, and the sealing performance of the lining tube is improved.

In order to improve the mechanical strength of the crater and ensure the effectiveness of crater sealing, the welding material of the folded edge 6 is further nickel-based alloy powder.

In order to prevent the plunger pump from vibrating and driving the motor to follow the vibration, thereby affecting the service life of the weld, further, as shown in fig. 2-3, a damping device is connected to one side of the end cover 3 away from the stator 1 by screw threads, the damping device comprises an upper cover plate 7, a lower cover plate 8, a waterproof breathable film 12, a rubber support rod 13, a shell 14, a pressing plate 16, a connecting rod 17, an air bag 18 and a spring 19, a first through hole 21 is formed on the upper cover plate 7, a second through hole 22 is formed on the lower cover plate 8, a first boss 9 is arranged at the bottom of the upper cover plate 7, a second boss 10 is arranged at the top of the lower cover plate 8, a sealing groove 11 which is in inserting fit with the first boss 9 is formed on the second boss 10, a waterproof breathable film 12 is arranged in the sealing groove 11, one end of the waterproof breathable film 12 is fixed on the first boss 10, the other end of the waterproof breathable film 12 is fixed on the second boss 10, the upper cover plate 7 is connected with the lower cover plate 8 by the rubber support rod 13, more than two shells 14 are further fixed on the lower cover plate 8, a first cavity 15 is formed in the shell 14, one end of a connecting rod 17 is fixedly connected with a pressing plate 16, the pressing plate 16 is arranged in the first cavity 15, the other end of the connecting rod 17 penetrates through the top wall of the shell 14 and is fixedly connected with the upper cover plate 7, the pressing plate 16 is connected with the bottom wall of the first cavity 15 through an air bag 18, a spring 19 is sleeved on the air bag 18, and more than two oil inlet holes 20 are further formed in the top wall of the shell 14. In the embodiment, the waterproof breathable film 12 is mainly formed by three layers of materials, namely a polypropylene spunbonded nonwoven fabric, a polyethylene polymer breathable film and a polypropylene spunbonded nonwoven fabric in sequence, has the advantages of low temperature resistance, corrosion resistance and the like, can work at the temperature of between 250 ℃ and 180 ℃ for a long time, utilizes the characteristic that water has very small molecular particle size and can smoothly pass through the polyethylene polymer breathable film under the gaseous condition, and has the characteristic that the liquid water cannot smoothly pass through the polyethylene polymer breathable film due to the large molecular particle size under the liquid condition, so that well fluid can be prevented from entering the motor, when the plunger pump works to generate vibration, the upper cover plate 7 is driven to move downwards, the upper cover plate 7 drives the pressing plate 16 to compress the spring 19 and the air bag 18 through the connecting rod 17, and meanwhile, the well fluid enters the first cavity 15 through the oil inlet 20 and absorbs vibration energy in the well fluid movement process; when upper cover plate 7 moved upwards, upper cover plate 7 moved clamp plate 16 through connecting rod 17 and moved up, well liquid in first cavity 15 was discharged first cavity 15 by oil inlet 20 under clamp plate 16's effect, well liquid absorbs vibration energy once more in the motion process, thereby cushion clamp plate 16 return stroke, make the vibration process steady, the one end rigid coupling of waterproof ventilated membrane 12 is in first boss 9 bottom simultaneously, and other end rigid coupling is on second boss 10 top, thereby keep apart seal groove 11 and oil well, prevent that well liquid from oozing in the motor, cause the potential safety hazard.

In order to ensure the sealing performance of the joint of the damping device, further, internal threads 23 are arranged in the first through hole 21 and the second through hole 22, and the end cover 3 is in threaded connection with the lower cover plate 8. Through the thread sealing mode, the sealing performance of the joint is ensured.

In order to prevent the motor from being short-circuited after well fluid permeates into the motor, a filling layer 24 is further arranged at the bottom of the sealing groove 11. The filling layer 24 is made of high-elasticity and high-water-absorption organic silicon rubber materials, the main component of petroleum is hydrocarbon substances, the petroleum is not conductive, well liquid is conductive due to water contained in the well liquid, and therefore when the well liquid leaks from the sealing groove 11, the filling layer 24 can absorb water in the well liquid and prevent the motor from being short-circuited after the well liquid seeps into the motor.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. The utility model provides a bore section of thick bamboo in latent oily electronic plunger pump stator nipple joint which characterized in that: including stator (1), inner tube (2) and end cover (3), stator (1) cover is located on inner tube (2), the equal butt in both ends of stator (1) has end cover (3), set up fluted (4) on end cover (3), taper hole (5) have been seted up to one side that recess (4) are close to stator (1), the one end of inner tube (2) is passed taper hole (5) and is extended to in recess (4), the port of inner tube (2) is provided with hem (6), hem (6) and recess (4) welding.

2. The submersible electric plunger pump stator nipple lining cartridge according to claim 1, characterized in that: the welding material of the folded edge (6) is nickel-based alloy powder.

3. The submersible electric plunger pump stator nipple lining cartridge according to claim 1, characterized in that: one side of the end cover (3) far away from the stator (1) is in threaded connection with a damping device, the damping device comprises an upper cover plate (7), a lower cover plate (8), a waterproof breathable film (12), a rubber supporting rod (13), a shell (14), a pressing plate (16), a connecting rod (17), an air bag (18) and a spring (19), a first through hole (21) is formed in the upper cover plate (7), a second through hole (22) is formed in the lower cover plate (8), a first boss (9) is arranged at the bottom of the upper cover plate (7), a second boss (10) is arranged at the top of the lower cover plate (8), a sealing groove (11) which is in inserting fit with the first boss (9) is formed in the second boss (10), the waterproof breathable film (12) is arranged in the sealing groove (11), the upper cover plate (7) is connected with the lower cover plate (8) through the rubber supporting rod (13), more than two shells (14) are further fixed on the lower cover plate (8), set up first cavity (15) in casing (14), the one end and clamp plate (16) fixed connection of connecting rod (17), clamp plate (16) set up in first cavity (15), the roof and upper cover plate (7) fixed connection that casing (14) were run through to the other end of connecting rod (17), be connected through gasbag (18) between clamp plate (16) and first cavity (15) diapire, on gasbag (18) were located in spring (19) cover, more than two inlet port (20) have still been seted up to casing (14) roof.

4. The submersible electric plunger pump stator nipple lining cartridge according to claim 3, characterized in that: the first through hole (21) and the second through hole (22) are internally provided with internal threads (23), and the end cover (3) is in threaded connection with the lower cover plate (8).

5. The submersible electric plunger pump stator nipple lining cartridge according to claim 3, characterized in that: and a filling layer (24) is arranged at the bottom of the sealing groove (11).