Horizontal section multi-stage centrifugal pump cover turning tool

Abstract

The utility model belongs to pump class repair frock technical field mainly relates to a horizontal split formula multistage centrifugal pump cover turning frock, including support system, transmission system and fixed system, support system includes one cross bracing, two vertical props, and cross bracing is perpendicular with vertical prop and detachable connection, and vertical prop one end is fixedly connected with transmission system through first connecting bolt, transmission system includes transmission shaft, bearing, bearing box and transmission mechanism, they are assembled together in proper order, fixed system includes connecting plate, connecting plate is provided with third connecting hole, third connecting hole is distributed in the both sides of connecting plate symmetry, connecting plate middle is provided with a round hole, round hole is assembled with rolling bearing, and the inner race of rolling bearing is fixed with transmission shaft, and connecting plate is detachably fixedly connected with both ends of pump shell through second connecting bolt. The utility model is easy to install and simple to operate, greatly saves manpower and time, and significantly improves the stability of operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of pump maintenance tooling, specifically relating to a horizontally split multistage centrifugal pump cover flipping tooling. Background Technology

[0002] As core equipment in offshore platform production operations, the stability and ease of maintenance of water injection pumps and external pumps are crucial. Multistage centrifugal pumps with a horizontally split structure are widely used due to their ease of maintenance and operational reliability. However, in the current offshore platform operating environment, there are some problems with the opening and maintenance of multistage centrifugal pumps, especially after the pump cover fasteners are removed. Due to the uneven distribution of the pump cover structure and limited maintenance space, the pump cover needs to be moved to a more spacious area for maintenance. This not only increases the difficulty of the operation but also requires the use of various slings, crowbars, and manual assistance due to the significant weight of the pump cover, resulting in time-consuming and labor-intensive work. Furthermore, during conventional hoisting operations, the horizontal weightlessness leads to insufficient stability, frequently causing collisions with the pump casing and flange tilting during hoisting, posing certain safety hazards for equipment maintenance. Therefore, this utility model aims to develop a convenient pump cover flipping fixture to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a horizontally split multistage centrifugal pump cover flipping fixture. This design is easy to install and operate, significantly improving work efficiency and reducing time and manpower consumption. This fixture effectively solves the problems of time-consuming, labor-intensive, and unstable pump cover flipping operations during the maintenance of water injection pumps and external pumps.

[0004] To achieve the above objectives, this application implements the following technical solution:

[0005] A horizontally split multistage centrifugal pump cover flipping fixture includes a support system, a transmission system, and a fixing system, characterized in that...

[0006] The support system includes a horizontal brace, two vertical braces, and a first connecting bolt. The horizontal brace and the vertical brace are perpendicular to each other and detachably connected. The two ends of the horizontal brace are provided with first connecting holes, one end of the vertical brace is provided with a second connecting hole, and the other end of the vertical brace is fixedly connected to the transmission system through the first connecting bolt.

[0007] The transmission system includes a transmission mechanism, bearings, bearing housings, and a transmission shaft, which are assembled together in sequence.

[0008] The fixing system includes a connecting plate and a second connecting bolt. The connecting plate is provided with a third connecting hole for connecting the second connecting bolt. The third connecting holes are symmetrically distributed on both sides of the connecting plate. A circular hole is provided in the middle of the connecting plate. A rolling bearing is installed in the circular hole. The inner ring of the rolling bearing is fixed to the drive shaft. The connecting plate is detachably fixed to both ends of the pump housing by the second connecting bolt.

[0009] As a further improvement to the horizontally split multistage centrifugal pump cover flipping fixture of this application, the transmission mechanism has an operating wrench on the outside.

[0010] As a further improvement to the horizontally split multistage centrifugal pump cover flipping fixture of this application, the bearing is set inside the bearing housing and cooperates with the drive shaft.

[0011] As a further improvement to the horizontally split multistage centrifugal pump cover flipping fixture of this application, the size of the first connecting bolt matches the size of the first connecting hole and the second connecting hole; the size of the second connecting bolt matches the size of the third connecting hole.

[0012] As a further improvement to the horizontally split multistage centrifugal pump cover flipping fixture of this application, the upper part of the cross brace is provided with a hanging component that is connected to the lifting equipment.

[0013] The above technical solution produces the following technical effects:

[0014] This application relates to a maintenance and tilting fixture for a horizontally split multistage centrifugal pump on an offshore platform. This structure, through its support system, significantly improves operational stability and efficiency, and allows for quick and stable positioning and support of the pump cover even in confined pump rooms. The transmission system employs a ratchet and pawl design, enabling the pump cover to tilt smoothly around the drive shaft and preventing swaying, thus enhancing safety. The detachable connection between the pump cover and the drive shaft greatly reduces time and manpower consumption, offering greater versatility. The central bearing bears radial force, resulting in low tilting resistance and reduced wear. This fixture effectively solves the problem of tilting the pump cover during the maintenance of water injection pumps and external pumps, ensuring the smooth operation of offshore production activities. Attached Figure Description

[0015] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate the present invention and their descriptions, which are used to explain the present invention and do not constitute an undue limitation of the present invention.

[0016] In the attached diagram:

[0017] Figure 1 This is a schematic diagram of the structure of the horizontally split multistage centrifugal pump cover flipping fixture in this utility model;

[0018] Figure 2This is a schematic diagram of the transmission system in this utility model;

[0019] Figure 3 This is a schematic diagram of the connecting plate in this utility model;

[0020] Figure 4 This is a schematic diagram of the pump cover structure;

[0021] in:

[0022] Support system: 11-Horizontal brace; 111-First connecting hole; 112-Hanging component; 12-Vertical brace; 121-Second connecting hole; 13-First connecting bolt;

[0023] Transmission system: 21-Transmission mechanism; 22-Bearing; 23-Bearing housing; 24-Drive shaft; 211-Operating wrench;

[0024] Fixing system: 31-connecting plate; 311-third connecting hole; 312-round hole; 3121-rolling bearing; 32-second connecting bolt. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0026] Implementation Method 1

[0027] Please refer to Figure 1-4This application provides a horizontally split multistage centrifugal pump cover flipping fixture, including a support system 1, a transmission system 2, and a fixing system 3. The support system 1 includes a horizontal brace 11, two vertical braces 12, and a first connecting bolt 13. The horizontal brace 11 serves as a beam, vertically and detachably connecting the two vertical braces 12. The horizontal brace 11 has first connecting holes 111 at both ends, and one end of each vertical brace 12 has a second connecting hole 121. The other end of each vertical brace 12 is fixedly connected to the transmission system 2 via the first connecting bolt 13, forming a portal frame. The transmission system 2 includes a transmission mechanism 21, bearings 22, bearing housings 23, and a transmission shaft 24. The transmission shaft 24, bearings 22, bearing housings 23, and transmission mechanism 21 are assembled sequentially. Preferably, each transmission system 2 includes two bearing housings 23 and two bearings 22. The bearings 22 are respectively connected to both sides of the transmission shaft 22 and installed inside the bearing housings 23. The transmission mechanism 21 in this application uses a hand-operated ratchet and pawl mechanism. When the operating wrench 211 is pushed, the pawl presses against the working surface of the ratchet teeth. The force is transmitted to the ratchet through the operating wrench 211 and the pawl. The ratchet advances one or more teeth according to the tooth pitch angle. After the hand is released, the pawl is still engaged with the previous tooth to lock the ratchet and prevent it from rotating. The fixing system 3 includes a connecting plate 31 and a second connecting bolt 32. The connecting plate 31 is provided with a third connecting hole 311 for connecting the second connecting bolt 32. The third connecting holes 311 are symmetrically distributed on both sides of the connecting plate 31. A circular hole 312 is provided in the middle of the connecting plate 31. A rolling bearing 3121 is fitted in the circular hole 312. The inner ring of the rolling bearing 3121 is fixed to the transmission shaft 24. The connecting plate 31 is detachably fixed to both ends of the pump housing by the second connecting bolt 32. The two ends of the pump cover are attached to the two connecting plates 31, and the second connecting bolt 32 is passed through the third connecting hole 311 and fastened to the hole at the end of the pump cover. Preferably, the third connecting hole 311 can also be made into a round hole to absorb hole spacing errors and facilitate alignment. The assembly is carried out through the following steps:

[0028] 1. Secure the pump cover to the connecting plate 31 at the third connecting hole 311 using the second connecting bolt 32. 2. Insert the drive shaft 24 into the rolling bearing 3121 of the connecting plate 31, using a flat key or expansion coupling sleeve as designed to achieve rigid torque transmission. 3. Fix the bearing housing 23 to the end of the vertical support 12, then install both ends of the bearing 22 into the bearing housing 23 and connect it to the flange of the vertical support 12. 4. Adjust the vertical support 12 so that the center line connecting the two drive shafts 24 is aligned with the pump cover flipping reference; affix a zero-angle mark to the side of the pump cover. 5. Simultaneously rotate the operating wrenches 211 on both sides at the same speed and amplitude. The pawl pushes the ratchet to "advance" in only one direction, transmitting torque to the connecting plate 31 through the drive shaft 24, which in turn drives the pump cover to flip. The operating wrench 211 and the ratchet input end are generally pluggable and can be removed when not in use. Furthermore, bearing 22 is mounted on drive shaft 24, with its outer ring housed in bearing housing 23, supporting drive shaft 24 as a rotatable component, ensuring coaxiality between the shaft and connecting plate 31 and easy rotation. The weight of the pump cover and the reaction force during tilting are transmitted to the lifting device via drive shaft 24, bearing 22, bearing housing 23, vertical support 12, and horizontal support 11, avoiding action on the pump cover bolts and ensuring rotational accuracy and lifespan. Furthermore, transmission mechanism 21 is connected to the lower end of vertical support 12 via a flange and is located outside vertical support 12; operating wrench 211 is located at the outermost end of vertical support 12 to avoid interference. Furthermore, the upper part of horizontal support 11 is equipped with a lifting device 112 for connection to lifting equipment. The lifting point is located at the center of horizontal support 11 or offset according to design; lifting force is transmitted through horizontal support 11, vertical support 12, and drive shaft 24, avoiding additional load on the pump cover sealing surface. Furthermore, a combination of a vertical plate and a triangular stiffening plate is provided above the connecting plate 31, which is fixedly connected to the center of the connecting plate 31 and the outer ring of the rolling bearing 3121. The others serve as secondary mechanical limit points, which can use pins at a specified angle to form geometric interference with the rotation of the connecting plate 31 and the pump cover, preventing swinging or accidental movement.

[0029] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A horizontally split multistage centrifugal pump cover flipping fixture, comprising a support system, a transmission system, and a fixing system, characterized in that, The support system includes a horizontal brace, two vertical braces, and a first connecting bolt. The horizontal brace and the vertical brace are perpendicular to each other and detachably connected. The two ends of the horizontal brace are provided with first connecting holes, one end of the vertical brace is provided with a second connecting hole, and the other end of the vertical brace is fixedly connected to the transmission system through the first connecting bolt. The transmission system includes a transmission mechanism, bearings, bearing housings, and a transmission shaft, which are assembled together in sequence. The fixing system includes a connecting plate and a second connecting bolt. The connecting plate is provided with a third connecting hole for connecting the second connecting bolt. The third connecting holes are symmetrically distributed on both sides of the connecting plate. A circular hole is provided in the middle of the connecting plate. A rolling bearing is installed in the circular hole. The inner ring of the rolling bearing is fixed to the drive shaft. The connecting plate is detachably fixed to both ends of the pump housing through the second connecting bolt.

2. The horizontally split multistage centrifugal pump cover flipping fixture according to claim 1, characterized in that, The transmission mechanism has an operating wrench on its exterior.

3. The horizontally split multistage centrifugal pump cover flipping fixture according to claim 1, characterized in that, The bearing is located inside the bearing housing and is coupled with the drive shaft.

4. The horizontally split multistage centrifugal pump cover flipping fixture according to claim 1, characterized in that, The size of the first connecting bolt matches the size of the first connecting hole and the second connecting hole; the size of the second connecting bolt matches the size of the third connecting hole.

5. The horizontally split multistage centrifugal pump cover flipping fixture according to claim 1, characterized in that, The upper part of the cross brace is equipped with a hanging device that connects to the lifting equipment.

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