Disassembling and assembling tool for liquid inlet end of multistage centrifugal pump

Abstract

The utility model relates to the technical field of centrifugal pumps, and provides a multi-stage centrifugal pump liquid inlet end dismounting tool which comprises two connecting plates, a rotating shaft is connected between the two connecting plates through bearings, protective pads are fixedly connected to the tops of the two connecting plates, fixing plates are fixedly connected to the exteriors of the two connecting plates, and the rotating shaft is connected with the fixing plates through bearings. Fixing shells are fixedly connected to the tops of the two fixing plates, columns are connected to the interiors of the two fixing shells through bearings, the two connecting plates are symmetrically distributed, the inner ends of the two connecting plates are in contact, rotating rods are connected to the interiors of the two columns through bearings, and the rotating rods are connected to the interiors of the two connecting plates through bearings. Long plates are fixedly connected to the exteriors of the two rotating rods, pressing plates are fixedly connected to one ends of the two long plates, one sides of the bottoms of the long plates make contact with the interior of the column body, and a plurality of connecting pads are fixedly connected to the bottoms of the two connecting plates. By means of the technical scheme, the problem that in the prior art, the liquid inlet end of the centrifugal pump cannot be conveniently taken out in a labor-saving mode is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a disassembly and assembly tool for a liquid inlet end of a multi-stage centrifugal pump. Background Art

[0002] The centrifugal pump works by using the rotation of the impeller to make the water centrifugal. Before starting the water pump, the pump casing and the water suction pipe must be filled with water, and then the motor is started so that the pump shaft drives the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller, and flows into the water pressure pipeline of the water pump through the flow channel of the volute pump casing. The centrifugal pump is a vane pump. During the rotation of the rotating impeller, due to the interaction between the blades and the liquid, the blades transfer mechanical energy to the liquid, so that the pressure of the liquid can be increased to achieve the purpose of conveying the liquid. Because the centrifugal pump relies on the vacuum suction formed by the centrifugal force of the impeller to lift the water, when the centrifugal pump is started, the gate valve must be closed and water must be filled. The water level must exceed the impeller position, and the air in the centrifugal pump must be discharged before it can be started. After starting, a vacuum is formed around the impeller, sucking the water upward, and its gate valve can automatically open to lift the water. Therefore, the gate valve must be closed first. Centrifugal pumps can be widely used in the power, metallurgy, coal, building materials and other industries to transport slurries containing solid particles. Such as hydraulic ash removal in thermal power plants, ore slurry transportation in metallurgical ore dressing plants, coal slurry and heavy medium transportation in coal washing plants, etc. When the centrifugal pump is working, the pump needs to be placed on land, the suction pipe is placed in the water, and the pump needs to be primed and started. Due to structural limitations, the motor of the mud pump and the submersible centrifugal pump needs to be placed above the water surface and the pump is placed in the water when working, so it must be fixed, otherwise the motor will fall into the water and cause the motor to be scrapped. In addition, since the length of the major axis is generally fixed, the pump is more troublesome to install and use, and the application occasions are subject to many restrictions.

[0003] The patent specification with announcement number CN217317870U discloses a centrifugal pump impeller disassembly and assembly tool. The centrifugal pump impeller disassembly and assembly tool comprises a fixing member and a fixing rod; the fixing rod is provided with at least two, the fixing member is provided with through holes equal to the number of the fixing rods, and the multiple fixing rods are detachably connected to the multiple through holes in a one-to-one correspondence; the fixing member is configured to be fixed at both ends to the outer surface of the pump casing. The centrifugal pump impeller disassembly and assembly tool provided by the utility model alleviates the problem that the fixing wrench is easy to scratch the impeller or the pump casing during the process of disassembling and assembling the impeller.

[0004] However, in the implementation of relevant technologies, it was found that the above technical solution has the following problems: the above device is not convenient for labor-saving removal of the liquid inlet end of the centrifugal pump during use, and it is easy to be disassembled and assembled through multiple fixing rods and through holes during use, which is relatively cumbersome. At the same time, the structure is not flexible enough during use, which will cause limitations in the use of the device. Therefore, further improvement is needed. Utility Model Content

[0005] The utility model provides a disassembly and assembly tool for the liquid inlet end of a multi-stage centrifugal pump, which solves the problem in the related art that it is inconvenient to remove the liquid inlet end of the centrifugal pump with little effort.

[0006] The technical solution of the utility model is as follows:

[0007] A disassembly and assembly tool for the liquid inlet end of a multi-stage centrifugal pump includes two connecting plates, a rotating shaft is connected between the two connecting plates through a bearing, protective pads are fixedly connected to the tops of the two connecting plates, fixed plates are fixedly connected to the outsides of the two connecting plates, fixed shells are fixedly connected to the tops of the two fixed plates, and columns are connected to the insides of the two fixed shells through bearings.

[0008] Preferably, the two connecting plates are symmetrically distributed, and the inner ends of the two connecting plates are in contact with each other.

[0009] Preferably, the inside of the two columns are connected to a rotating rod via a bearing, and the outside of the two rotating rods are fixedly connected to a long plate.

[0010] Preferably, one end of each of the two long plates is fixedly connected to a pressing plate, and one side of the bottom of the long plate is in contact with the inside of the column.

[0011] Preferably, a plurality of connection pads are fixedly connected to the bottom of the two connection plates, and the plurality of connection pads are arranged and distributed in a semicircle.

[0012] Preferably, mounting plates are fixedly mounted on the outside of the two long boards, and pry bars are fixedly mounted on the inside of the two mounting plates.

[0013] Preferably, the bottoms of the two pry bars are fixedly connected to support plates, and the bottoms of the two support plates are fixedly connected to a plurality of anti-slip pads.

[0014] Preferably, the anti-slip pads are all configured to be rectangular in shape, and are arranged in a line.

[0015] The working principle and beneficial effects of the utility model are:

[0016] In the utility model, the pressing plate is erected, and the pressing plate will synchronously drive the long plate to be vertical during the erection process, and then the staff lifts the pressing plate, at which time the pressing plate will drive the long plate and the rotating rod to move upward, and the rotating rod will synchronously drive the column, the fixed shell and the fixed plate to move upward during the movement, and the fixed plate will drive the liquid inlet end to be lifted and separated through the connecting plate and the protective pad during the movement, thereby achieving the disassembly work, solving the problem of inconvenience in taking out the liquid inlet end of the centrifugal pump with effort;

[0017] In the utility model, the support plate and the anti-skid pad are brought into contact with one side of the centrifugal pump by a pry bar, and then the pressing plate is pressed downward, and the pressing plate will synchronously drive the long plate, the rotating rod and the column to tilt up during the pressing process, and the rotating rod will synchronously drive the fixed shell, the fixed plate and the connecting plate to pry up during the tilting process, and the connecting plate will lift the tightly connected liquid inlet end during the prying process, and the pry bar, the support plate and the anti-skid pad will support it, so that the tightly connected liquid inlet end can be loosened, thereby solving the problem of inconvenience in taking out the liquid inlet end of the centrifugal pump with little effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of the utility model from an upward viewing angle;

[0021] Figure 3 For this utility model Figure 1 A in the enlarged view;

[0022] Figure 4 For this utility model Figure 2 Enlarged view of point B in .

[0023] In the figure: 1. connecting plate; 2. rotating shaft; 3. protective pad; 4. connecting pad; 5. fixing plate; 6. fixing shell; 7. column; 8. rotating rod; 9. long plate; 10. pressing plate; 11. mounting plate; 12. pry bar; 13. supporting plate; 14. anti-slip pad. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0025] like Figure 1~Figure 3 As shown, this embodiment proposes a disassembly and assembly tool for the liquid inlet end of a multi-stage centrifugal pump, including two connecting plates 1, a rotating shaft 2 is connected between the two connecting plates 1 through a bearing, a protective pad 3 is fixedly connected to the top of the two connecting plates 1, a fixing plate 5 is fixedly connected to the outside of the two connecting plates 1, a fixing shell 6 is fixedly connected to the top of the two fixing plates 5, and a column 7 is connected to the inside of the two fixing shells 6 through a bearing.

[0026] In this embodiment, the two connecting plates 1 are symmetrically distributed, and the inner ends of the two connecting plates 1 are in contact with each other, which can facilitate the rotation and separation of the connecting plates 1.

[0027] In this embodiment, the inside of the two columns 7 are connected to the rotating rods 8 through bearings, and the outside of the two rotating rods 8 are fixedly connected to the long plates 9, which can facilitate the rotation of the long plates 9.

[0028] In this embodiment, one end of each of the two long plates 9 is fixedly connected with a pressing plate 10 , and one side of the bottom of the long plate 9 is in contact with the inside of the column 7 , which can facilitate the support work of the long plate 9 .

[0029] In this embodiment, a plurality of connection pads 4 are fixedly connected to the bottom of the two connection plates 1 , and the plurality of connection pads 4 are arranged and distributed in a semicircular shape, which can facilitate the protection of the device by the connection pads 4 .

[0030] During use, when it is necessary to disassemble the liquid inlet end of the centrifugal pump, the staff first needs to hold the two pressing plates 10 and then rotate them toward the middle. The pressing plates 10 will synchronously drive the long plates 9 to rotate during the rotation, and the long plates 9 will synchronously drive the column 7 and the rotating rod 8 to rotate during the rotation. The column 7 will synchronously drive the connecting plate 1 to rotate during the rotation, that is, the connecting plates 1 on both sides are gradually separated, so that the distance between the connecting plates 1 on both sides can be continuously expanded, so as to surround the bottom of the liquid inlet end of the centrifugal pump but not fit it. After that, the staff will reset the pressing plates 10 on both sides again so that the two The connecting plate 1 can be in a perfect circular shape. At this time, the liquid inlet end parts are located on the top of the two connecting plates 1, and the two protective pads 3 will be in contact with them for protection. Then the staff will erect the pressing plate 10. During the erection process, the pressing plate 10 will synchronously drive the long plate 9 to be vertical. Then the staff will lift the pressing plate 10. At this time, the pressing plate 10 will drive the long plate 9 and the rotating rod 8 to move upward. During the movement, the rotating rod 8 will synchronously drive the column 7, the fixed shell 6 and the fixed plate 5 to move upward. During the movement, the fixed plate 5 will drive the liquid inlet end to be lifted and separated through the connecting plate 1 and the protective pad 3, thereby achieving the disassembly work. Example 2

[0031] like Figure 2 , Figure 4 As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment further proposes that the two long boards 9 are fixedly mounted with mounting plates 11 on the outside, and the two mounting plates 11 are fixedly mounted with pry bars 12 on the inside, which can facilitate the fixed connection of the pry bars 12.

[0032] In this embodiment, the bottoms of the two pry bars 12 are fixedly connected to support plates 13 , and the bottoms of the two support plates 13 are fixedly connected to a plurality of anti-slip pads 14 , which can facilitate the fixed connection of the support plates 13 .

[0033] In this embodiment, the multiple anti-skid pads 14 are all configured to be rectangular in shape, and the multiple anti-skid pads 14 are arranged in a line shape, which can facilitate the anti-skid work of the anti-skid pads 14.

[0034] During use, when it is necessary to separate the liquid inlet end of the centrifugal pump that is tightly connected, since the two connecting plates 1 surround the bottom of the liquid inlet end but do not fit together, the staff needs to wrap the liquid inlet end with the connecting plate 1, and then use the pry bar 12 to make the support plate 13 and the anti-skid pad 14 contact with one side of the centrifugal pump, and then press the pressing plate 10 downward. During the pressing process, the pressing plate 10 will synchronously drive the long plate 9, the rotating rod 8 and the column 7 to tilt up, and the rotating rod 8 will synchronously drive the fixed shell 6, the fixed plate 5 and the connecting plate 1 to pry up during the tilting process. During the prying process, the connecting plate 1 will lift the liquid inlet end, and the pry bar 12, the support plate 13 and the anti-skid pad 14 will support it, so that the tightly connected liquid inlet end can be loosened.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage centrifugal pump inlet end disassembly and assembly tool, comprising two connecting plates (1), characterized in that: A rotating shaft (2) is connected between the two connecting plates (1) via a bearing, a protective pad (3) is fixedly connected to the top of the two connecting plates (1), a fixing plate (5) is fixedly connected to the outside of the two connecting plates (1), a fixing shell (6) is fixedly connected to the top of the two fixing plates (5), and a column (7) is connected to the inside of the two fixing shells (6) via a bearing.

2. The multi-stage centrifugal pump liquid inlet end disassembly and assembly tool according to claim 1, characterized in that: The two connecting plates (1) are symmetrically distributed, and the inner ends of the two connecting plates (1) are in contact with each other.

3. The multi-stage centrifugal pump liquid inlet end disassembly and assembly tool according to claim 1, characterized in that: The insides of the two columns (7) are connected to rotating rods (8) via bearings, and the outsides of the two rotating rods (8) are fixedly connected to long plates (9).

4. The multi-stage centrifugal pump liquid inlet end disassembly and assembly tool according to claim 3, characterized in that: One end of each of the two long plates (9) is fixedly connected to a pressing plate (10), and one side of the bottom of the long plates (9) is in contact with the interior of the column (7).

5. The multi-stage centrifugal pump liquid inlet end disassembly and assembly tool according to claim 1, characterized in that: A plurality of connection pads (4) are fixedly connected to the bottom of the two connection plates (1), and the plurality of connection pads (4) are arranged and distributed in a semicircular shape.

6. The multi-stage centrifugal pump liquid inlet end disassembly and assembly tool according to claim 3, characterized in that: A mounting plate (11) is fixedly mounted on the outside of the two long plates (9), and a pry bar (12) is fixedly mounted on the inside of the two mounting plates (11).

7. The multi-stage centrifugal pump liquid inlet end disassembly and assembly tool according to claim 6, characterized in that: The bottoms of the two pry bars (12) are fixedly connected to a support plate (13), and the bottoms of the two support plates (13) are fixedly connected to a plurality of anti-slip pads (14).

8. The multi-stage centrifugal pump liquid inlet end disassembly and assembly tool according to claim 7, characterized in that: The multiple anti-slip pads (14) are all configured to be rectangular in shape, and the multiple anti-slip pads (14) are arranged in a linear shape.

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