New fully enclosed long-axis submersible pump

Abstract

A new type of fully enclosed long-shaft submersible pump relates to the technical field of drilling equipment. The mounting plate is connected to the sleeve through flanges and bolts, the lower part of the sleeve is connected to the snail shell, one side of the snail shell is connected to the liquid outlet pipe, an impeller is installed in the snail shell, the impeller is connected to the pump shaft, a sleeve shaft is welded on the upper part of the pump shaft, the countersunk hole of the sleeve shaft is connected to the fixed shaft through a bearing group, a bracket is welded on the upper part of the mounting plate, the fixed shaft is fixedly connected to the bracket, a pulley A is welded on the upper part of the sleeve shaft, pulley A is connected to pulley B through a V-belt drive, pulley B is connected to the output shaft of the motor through a flat key, and the motor is installed on the bracket. The beneficial effect of the utility model is: by welding the sleeve shaft on the upper part of the pump shaft, the sleeve shaft is connected to the fixed shaft through the bearing group, so that the cantilever part of the pump shaft can be shortened, reducing the vibration of the pump shaft, the motor drives the sleeve shaft through a belt drive, which can play an overload protection role for the motor, and the bearings connected to the sleeve shaft and the fixed shaft are all inside the sleeve shaft to avoid bearing damage caused by mud splashing.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, in particular to a novel fully enclosed long-axis submersible pump. Background Art

[0002] During drilling operations, the mud returned from the bottom of the well needs to be processed and recycled. At this time, a sand pump is needed to pump the mud from the mud tank into a vibrating screen for screening mud, gravel and fine sand. The sand pump uses a vertical centrifugal pump, and the pump head extends below the liquid surface to suck the mud. The depth of the mud pool exceeds the pump shaft length of an ordinary vertical centrifugal pump. At this time, a specially customized long-shaft motor is required, or a coupling structure is used to connect a long pump shaft. The complex structure and the long cantilever shaft will deflect at high speed, and the vibration generated will reduce the service life of the pump. Utility Model Content

[0003] In order to solve the problems of complex structure and short service life of the pump when pumping mud in drilling operation, the utility model provides a novel fully enclosed long-axis submersible pump.

[0004] The technical scheme provided by the utility model is as follows: a novel fully enclosed long-axis submersible pump comprises a mounting plate, the mounting plate is mounted on the upper part of a mud tank through flanges and bolts, the mounting plate is connected to a sleeve through flanges and bolts, the lower part of the sleeve is connected to a snail shell through bolts and flanges, one side of the snail shell is tangentially connected to a liquid outlet pipe, an impeller is mounted in the snail shell, the impeller is connected to a pump shaft through a flat key, a sleeve shaft is welded on the upper part of the pump shaft, a countersunk hole is opened from the upper part to the lower part of the sleeve shaft, the countersunk hole of the sleeve shaft is connected to a fixed shaft through a bearing group, a bracket is welded on the upper part of the mounting plate, the fixed shaft is fixedly connected to the bracket, a pulley A is welded on the upper part of the sleeve shaft, the pulley A is connected to a pulley B through a V-belt transmission, the pulley B is connected to an output shaft of a motor through a flat key, and the motor is mounted on the bracket.

[0005] The motor is a horizontal motor, which is mounted on a base plate by bolts. Four bolts are welded on the base plate, and each bolt is connected to the bracket by two nuts. The distance between pulley A and pulley B can be adjusted.

[0006] A sealing cover is connected to the top of the sleeve shaft through bolts, and a lip sealing ring is installed in the sealing cover.

[0007] The beneficial effects of the utility model are as follows: by welding a sleeve shaft on the upper part of the pump shaft, the sleeve shaft is connected to the fixed shaft through a bearing group, so that the cantilever part of the pump shaft can be shortened, reducing the vibration of the pump shaft, and the motor drives the sleeve shaft through a belt drive, which can provide overload protection for the motor, thus avoiding the disadvantage that the motor of the motor directly connected to the pump has no overload protection, and the bearings connecting the sleeve shaft and the fixed shaft are all inside the sleeve shaft, thus avoiding the problem that the bearing group of the motor directly connected to the pump is exposed to the mud splash range, resulting in bearing damage and the pump cannot be used. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Attached Figure 1 It is a structural schematic diagram of the utility model.

[0009] In the figure, 1-mounting plate, 2-sheath, 3-snail shell, 4-liquid outlet pipe, 5-impeller, 6-fixed shaft, 7-pulley A, 8-pulley B, 9-motor, 10-bracket, 11-base plate, 12-pump shaft, 13-sleeve shaft, 14-sealing cover. DETAILED DESCRIPTION

[0010] like Figure 1 As shown, the new type of fully enclosed long-axis submersible pump includes a mounting plate 1, which is mounted on the upper part of the mud tank through flanges and bolts, the mounting plate 1 is connected to a sleeve 2 through flanges and bolts, the lower part of the sleeve 2 is connected to a snail shell 3 through bolts and flanges, one side of the snail shell 3 is tangentially connected to a liquid outlet pipe 4, an impeller 5 is installed in the snail shell 3, the impeller 5 is connected to a pump shaft 12 through a flat key, a sleeve shaft 13 is welded on the upper part of the pump shaft 12, a countersunk hole is opened from the upper part to the lower part of the sleeve shaft 13, the countersunk hole of the sleeve shaft 13 is connected to a fixed shaft 6 through a bearing group, a bracket 10 is welded on the upper part of the mounting plate 1, the fixed shaft 6 is fixedly connected to the bracket 10, a pulley A7 is welded on the upper part of the sleeve shaft 13, the pulley A7 is connected to the pulley B8 through a V-belt drive, the pulley B8 is connected to the output shaft of the motor 9 through a flat key, and the motor 9 is mounted on the bracket 10.

[0011] The motor 9 is a horizontal motor, which is mounted on a base plate 11 by bolts. Four bolts are welded on the base plate 11, and each bolt is connected to the bracket 10 by two nuts, so that the distance between the pulley A7 and the pulley B8 can be adjusted.

[0012] The top of the sleeve shaft 13 is connected with a sealing cover 14 by bolts, and a lip sealing ring is installed in the sealing cover 14.

[0013] By welding a sleeve shaft 13 on the upper part of the pump shaft 12, the sleeve shaft 13 is connected to the fixed shaft 6 through a bearing group, so that the cantilever part of the pump shaft 12 can be shortened, reducing the vibration of the pump shaft 12, and the motor 9 drives the sleeve shaft 13 through a belt drive, which can play an overload protection role for the motor 9, thereby avoiding the disadvantage that the motor 9 directly connected to the pump has no overload protection. The bearings connecting the sleeve shaft 13 and the fixed shaft 6 are all inside the sleeve shaft 13, thereby avoiding the problem that the bearing group of the motor 9 directly connected to the pump is exposed to the mud splash range, resulting in bearing damage and the pump cannot be used.

[0014] As a solid control equipment, this mud pump is a new type of fully enclosed long-axis submersible pump used in oil drilling and other engineering fields. Compared with traditional mud pumps, this product has the following characteristics:

[0015] The rotating part of the pump shaft 12 is a fully enclosed structure, isolating the mud medium from the transmission shaft, and is not contaminated by the mud, which greatly extends the service life. The pump shaft 12 does not use oil seals and mechanical seals, and is reliable in operation and greatly reduces daily maintenance costs. The transmission shaft length can reach 3-5m, and the application range is wider. The pump adopts a centrifugal pump structure with a simple and compact structure, which is easy to operate and maintain. It is driven by a belt, and the inspection and replacement of components are easy, reducing maintenance costs and downtime.

Claims

1. A novel fully enclosed long-axis submersible pump, comprising a mounting plate (1), characterized in that: The mounting plate (1) is mounted on the upper part of the mud tank through flanges and bolts. The mounting plate (1) is connected to the sleeve (2) through flanges and bolts. The lower part of the sleeve (2) is connected to the volute shell (3) through bolts and flanges. One side of the volute shell (3) is tangentially connected to the liquid outlet pipe (4). An impeller (5) is mounted in the volute shell (3). The impeller (5) is connected to the pump shaft (12) through a flat key. A sleeve shaft (13) is welded on the upper part of the pump shaft (12). The sleeve shaft (13) has a countersunk hole from the upper part to the lower part. The countersunk hole of the sleeve shaft (13) is connected to the fixed shaft (6) through a bearing group. A bracket (10) is welded on the upper part of the mounting plate (1). The fixed shaft (6) is fixedly connected to the bracket (10). A pulley A (7) is welded on the upper part of the sleeve shaft (13). The pulley A (7) is connected to the pulley B (8) through a V-belt transmission. The pulley B (8) is connected to the output shaft of the motor (9) through a flat key. The motor (9) is mounted on the bracket (10).

2. The novel fully enclosed long-axis submersible pump according to claim 1 is characterized in that: The motor (9) is a horizontal motor. The motor (9) is mounted on a base plate (11) by bolts. Four bolts are welded on the base plate (11). Each bolt is connected to a bracket (10) by two nuts. The distance between the pulley A (7) and the pulley B (8) can be adjusted.

3. The novel fully enclosed long-axis submersible pump according to claim 1 is characterized in that: The top of the sleeve shaft (13) is connected with a sealing cover (14) via bolts, and a lip sealing ring is installed in the sealing cover (14).

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