CN215672724U

CN215672724U - Multistage pump for oil and gas field

Info

Publication number: CN215672724U
Application number: CN202122090214.0U
Authority: CN
Inventors: 蒋军锋; 唐兴波; 杨爽; 任伟; 江敏; 杨政
Original assignee: Chongqing Tesheng Electromechanical Equipment Co ltd
Current assignee: Chongqing Tesheng Electromechanical Equipment Co ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-01-28
Anticipated expiration: 2031-08-30

Abstract

The utility model discloses a multistage pump for an oil and gas field, which comprises a pump body, wherein the pump body comprises a pump shell, an end cover and a pump shaft; the end cover is provided with a mounting hole for the pump shaft to pass through and a tail cover; two ends of the pump shaft penetrate through the end cover and are rotatably arranged on the tail cover through a bearing; the pump shaft is fixedly sleeved with a shaft sleeve penetrating through the mounting hole, the mounting hole is provided with a static ring seat, the static ring seat comprises a static sealing ring sleeved on the shaft sleeve, the inner diameter of the static sealing ring is matched with the outer diameter of the shaft sleeve, and the outer diameter of the static sealing ring is matched with the inner diameter of the mounting hole; the outward end of the static sealing ring is provided with a flange plate, and the inward side of the flange plate is provided with a sealing groove and a sealing ring and is fixedly arranged on the end cover; the inner fixed mounting of axle sleeve has solid fixed ring, gu still have between fixed ring and the quiet ring seat with quiet sealing ring cooperation set up move the sealing ring, move and install the elastic component between sealing ring and the solid fixed ring. The utility model has the advantages of simple structure, small modification difficulty, contribution to reducing the cost, prolonging the service life and the like.

Description

Multistage pump for oil and gas field

Technical Field

The utility model relates to the field of gas-ore multistage pumps, in particular to a multistage pump for an oil-gas field.

Background

The medium conveyed by the centrifugal pump used in the oil-gas field is mainly gas field water, and the gas field water has poor water quality, contains fine impurities and has high corrosivity. The oil and gas field still keeps a large amount of multi-stage centrifugal pump machines sealed by the packing, when the water pump works, the medium pressure at the shaft seal is increased, water containing impurities enters the packing ring along the surface of the shaft, the pump shaft forms relative friction with the packing when rotating at high speed, the fine impurities between the shaft and the packing accelerate the abrasion of the main shaft and the packing, after the pump shaft at the packing position is abraded, the gnawing of the packing is accelerated in reverse, the packing sealing failure is caused, a large amount of sewage is leaked to a working site from the shaft seal, the sewage needs to be cleaned frequently and the multi-stage pump needs to be maintained, and therefore, the structure of the existing multi-stage pump sealed by the packing needs to be improved.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the technical problems to be solved by the utility model are as follows: how to provide a simple structure, the repacking degree of difficulty is little, is favorable to reduce cost, increase of service life's oil gas field with multistage pump.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a multi-stage pump for oil and gas fields comprises a pump body, wherein the pump body comprises a pump shell which is integrally columnar, end covers which are arranged at two ends of the pump shell and a pump shaft which is coaxially arranged on the pump shell; the end cover is provided with a mounting hole for the pump shaft to pass through and a tail cover; two ends of the pump shaft penetrate through the end cover and are rotatably arranged on the tail cover through a bearing; the pump is characterized in that a shaft sleeve penetrating through the mounting hole is fixedly sleeved on the pump shaft, a static ring seat is mounted on the mounting hole and comprises a static sealing ring sleeved on the shaft sleeve, the inner diameter of the static sealing ring is matched with the outer diameter of the shaft sleeve, and the outer diameter of the static sealing ring is matched with the inner diameter of the mounting hole; the outward end of the static sealing ring is provided with a flange plate, and the inward side of the flange plate is provided with a sealing groove and a sealing ring and is fixedly arranged on the end cover; the inner fixed mounting of axle sleeve has solid fixed ring, gu fixed ring with still have between the quiet ring seat with the dynamic seal ring that quiet sealing ring cooperation set up, dynamic seal ring with install the elastic component between the solid fixed ring, make dynamic seal ring is in along axial butt on the quiet sealing ring.

By adopting the structure, the static ring seat is arranged on the end cover through the flange plate, the sealing ring between the static ring seat and the end cover is utilized to form sealing, and the dynamic sealing ring forms dynamic sealing with the static sealing ring under the action of the elastic part. When the pump shaft rotates, the movable sealing ring is tightly pressed on the static sealing ring under the action of the elastic force of the elastic piece and the internal pressure, and a movable sealing structure is formed between the movable sealing ring and the static sealing ring, so that leakage is avoided. Above-mentioned structure is through installing axle sleeve and quiet ring holder between original pump shaft and end cover, especially installs quiet sealing ring on original end cover through the ring flange, will move the sealing ring and install on the axle sleeve, on the basis of original structure, only needs very little change, just can change into mechanical seal with packing seal, can enough save the transformation cost, can prolong the life of equipment again.

Furthermore, the elastic part is sleeved with a spiral spring on the shaft sleeve, one end of the spiral spring is abutted to the fixed ring, and the other end of the spiral spring is abutted to the movable sealing ring.

Furthermore, the edge of the fixed ring extends along the axial direction to form an annular lantern ring, the ring sleeve extends to the movable sealing ring, and one end, away from the fixed ring, of the ring sleeve contracts inwards and is attached to the outer circular surface of the movable sealing ring.

Therefore, a relatively closed space is formed between the ring sleeve and the movable sealing ring, and the elastic piece can be prevented from being corroded by impurities in a conveying medium in the space, so that the service life is prolonged.

Furthermore, the outer disc of solid fixed ring has the bead that sets up along the axial on, the bead is followed solid fixed ring's circumference equipartition is provided with a plurality ofly.

Like this, when solid fixed ring rotated along with the pump shaft, the media that contains impurity was mixxed to the bead on its surface, and the drive media that contains impurity revolves around the pump shaft, and impurity is thrown outward along the footpath under the centrifugal force effect to keep away from the pump shaft, avoid impurity gathering between moving seal ring and quiet sealing ring, be favorable to increase of service life.

Furthermore, the pump also comprises a base, one end of the pump shaft penetrates through the tail cover and is connected with a motor, and the motor and the pump body are both arranged on the base.

Furthermore, a first pipeline is installed on one side of the top end of the pump shell, one end, away from the pump shell, of the first pipeline is connected with a second pipeline through a flange, a fourth pipeline is installed on one side of the pump shell, one end, away from the pump shell, of the fourth pipeline is connected with a third pipeline through a flange, and a control valve is installed on the top end of the fourth pipeline.

Furthermore, a protective cover is arranged between the motor and the pump body.

In conclusion, the utility model has the advantages of simple structure, small modification difficulty, contribution to reducing the cost, prolonging the service life and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the multistage pump of the present invention.

Fig. 2 is a schematic view of the overall structure of fig. 1 with the tail cover removed.

Fig. 3 is a schematic structural diagram of the shaft sleeve, the fixing ring, the dynamic sealing ring and the static ring seat.

Fig. 4 is a schematic sectional structure view of the installation state of the shaft sleeve, the fixing ring, the dynamic sealing ring and the static ring seat.

Fig. 5 is a schematic structural view of the fixing ring.

Detailed Description

The present invention will be described in further detail with reference to examples.

In the specific implementation: as shown in fig. 1 to 4, a multistage pump for oil and gas fields comprises a base 1, wherein a motor 10 and a pump body 2 are installed on the base 1, and the pump body 2 comprises a pump shell 21 which is integrally columnar, end covers 22 installed at two ends of the pump shell 21, and a pump shaft 23 coaxially arranged on the pump shell 21; the pump housing 21 is mounted on the base plate 1 by means of two mounting seats 3. The end cover 22 is provided with a mounting hole for the pump shaft 23 to pass through and is provided with a tail cover 9; two ends of the pump shaft 23 penetrate through the end cover 22 and are rotatably arranged on the tail cover 9 through bearings; one end of the pump shaft 23 penetrates through the tail cover 9 and is connected with the motor 10, and a protective cover 11 is further installed between the motor 10 and the pump body 2.

The improved pump is characterized in that a first pipeline 4 is installed on one side of the top end of the pump shell 21, one end, far away from the pump shell 21, of the first pipeline 4 is connected with a second pipeline 5 through a flange, a fourth pipeline 7 is installed on one side of the pump shell 21, one end, far away from the pump shell 21, of the fourth pipeline 7 is connected with a third pipeline 6 through a flange, and a control valve 8 is installed at the top end of the fourth pipeline 7.

When a multi-stage pump sealed by the existing packing is reformed, the shaft hole of the existing end cover 22 is cleaned, the surface of a pump shaft is cleaned, a shaft sleeve 12 penetrating through the mounting hole is fixedly sleeved on the pump shaft 23, a static ring seat 15 is installed on the mounting hole, the static ring seat 15 comprises a static sealing ring sleeved on the shaft sleeve 12, the inner diameter of the static sealing ring is matched with the outer diameter of the shaft sleeve 12, and the outer diameter of the static sealing ring is matched with the inner diameter of the mounting hole; the outward end of the static sealing ring is provided with a flange plate, one inward side of the flange plate is provided with a sealing groove and a sealing ring, and the sealing groove and the sealing ring are fixedly arranged on the end cover 22; the inner fixed mounting of axle sleeve 12 has solid fixed ring 14, gu fixed ring 14 with still have between the quiet ring seat 15 with the movable sealing ring 13 that quiet sealing ring cooperation set up, movable sealing ring 13 with gu install the elastic component between the fixed ring 14, make movable sealing ring 13 is in along axial butt on the quiet sealing ring.

In this embodiment, the elastic member is a coil spring sleeved on the shaft sleeve 12, one end of the coil spring abuts against the fixed ring 14, and the other end of the coil spring abuts against the movable sealing ring 13. In order to avoid impurities entering the spiral spring and influencing the spring work, the edge of the fixed ring 14 extends along the axial direction to form an annular ring sleeve, the ring sleeve extends to the movable sealing ring 13, and one end, away from the fixed ring 14, of the ring sleeve is contracted inwards and is attached to the outer circular surface of the movable sealing ring 13.

By adopting the structure, the static ring seat is arranged on the end cover through the flange plate, the sealing ring between the static ring seat and the end cover is utilized to form sealing, and the dynamic sealing ring forms dynamic sealing with the static sealing ring under the action of the elastic part. During operation, after the pump shaft 23 rotates, the dynamic sealing ring is tightly pressed on the static sealing ring under the action of the elastic force of the elastic part and the internal pressure, and a dynamic sealing structure is formed between the dynamic sealing ring and the static sealing ring, so that leakage is avoided. Above-mentioned structure is through installing axle sleeve and quiet ring seat between original pump shaft 23 and end cover, especially installs quiet sealing ring on original end cover through the ring flange, will move the sealing ring and install on the axle sleeve, on the basis of original structure, only needs very little change, just can change into mechanical seal with packing seal, can enough save the transformation cost, can prolong the life of equipment again.

In specific implementation, as shown in fig. 5, the following structures may be added: the outer circular surface of the fixing ring 14 is provided with a plurality of ribs arranged along the axial direction, and the circumferential direction of the ribs along the fixing ring 14 is uniformly distributed.

Like this, when solid fixed ring rotated along with pump shaft 23, the media that contains impurity was stirred to the bead on its surface, and the drive media that contains impurity is rotatory around pump shaft 23, and impurity is thrown outward along the footpath under the centrifugal force effect to keep away from pump shaft 23, avoid impurity gathering between moving seal ring and quiet seal ring, be favorable to increase of service life.

The above description is only exemplary of the present invention and should not be taken as limiting, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage pump for oil and gas fields comprises a pump body (2), wherein the pump body (2) comprises a pump shell (21) which is integrally columnar, end covers (22) which are arranged at two ends of the pump shell (21) and a pump shaft (23) which is coaxially arranged on the pump shell (21); the end cover (22) is provided with a mounting hole for the pump shaft (23) to pass through and a tail cover (9) is mounted; both ends of the pump shaft (23) penetrate through the end cover (22) and are rotatably arranged on the tail cover (9) through bearings; the pump is characterized in that a shaft sleeve (12) penetrating through the mounting hole is fixedly sleeved on the pump shaft (23), a static ring seat (15) is mounted on the mounting hole, the static ring seat (15) comprises a static sealing ring sleeved on the shaft sleeve (12), the inner diameter of the static sealing ring is matched with the outer diameter of the shaft sleeve (12), and the outer diameter of the static sealing ring is matched with the inner diameter of the mounting hole; the outward end of the static sealing ring is provided with a flange plate, one inward side of the flange plate is provided with a sealing groove and a sealing ring, and the sealing groove and the sealing ring are fixedly arranged on the end cover (22); the inner fixed mounting of axle sleeve (12) has solid fixed ring (14), gu fixed ring (14) with still have between quiet ring seat (15) with quiet sealing ring cooperation sets up move sealing ring (13), move sealing ring (13) with install the elastic component between solid fixed ring (14), make move sealing ring (13) along axial butt on the quiet sealing ring.

2. The multistage pump for oil and gas fields as claimed in claim 1, wherein the elastic member is a coil spring sleeved on the shaft sleeve (12), one end of the coil spring abuts against the fixed ring (14), and the other end abuts against the dynamic sealing ring (13).

3. Multistage pump for oil and gas fields according to claim 2, characterized in that the edge of the fixed ring (14) extends axially to form an annular collar which extends to the dynamic sealing ring (13), and the end of the collar remote from the fixed ring (14) is contracted inwards and fits on the outer circumferential surface of the dynamic sealing ring (13).

4. The multistage pump for oil and gas fields as claimed in claim 1, wherein the outer circumferential surface of the fixing ring (14) is provided with ribs arranged along the axial direction, and the ribs are uniformly distributed along the circumferential direction of the fixing ring (14) in plurality.

5. The multistage pump for oil and gas fields according to claim 1, characterized by further comprising a base (1), wherein one end of the pump shaft (23) passes through the tail cover (9) and is connected with a motor (10), and the motor (10) and the pump body (2) are both mounted on the base (1).

6. The multistage pump for oil and gas fields as claimed in claim 5, characterized in that a first pipeline (4) is installed on one side of the top end of the pump shell (21), one end of the first pipeline (4) far away from the pump shell (21) is connected with a second pipeline (5) through a flange, a fourth pipeline (7) is installed on one side of the pump shell (21), one end of the fourth pipeline (7) far away from the pump shell (21) is connected with a third pipeline (6) through a flange, and a control valve (8) is installed on the top end of the fourth pipeline (7).

7. Multistage pump for oil and gas fields according to claim 5, characterized in that between the motor (10) and the pump body (2) there is also mounted a protection shield (11).