A general-purpose wrench for quickly disassembling and assembling a feed water pump end cover nut of a thermal power plant

Abstract

A kind of fast dismounting universal wrench for power plant feed pump end cover nut.Currently, feed pump end cover nut is heavy and large in size, and workers are very hard when rotating the nut manually (if special hydraulic wrench is used throughout, it is very time-consuming) and it takes 20 minutes for two people to replace a nut.This utility model comprises an outer turntable and an inner sleeve, the inner sleeve is threadedly connected to the outer turntable, three groups of rest frames arranged in a circle are inserted into the outer side of the inner sleeve, the horizontal rod in the door-shaped frame of the rest frame is located in the arc-shaped gap of the outer turntable, and the top of the inner sleeve is welded with an operating handle.This utility model is applied to the dismounting wrench for water pump end cover.

Description

Technical Field

[0001] This utility model relates to a universal wrench for quick disassembly and assembly of end cover nuts for water pumps in thermal power plants. Background Technology

[0002] Currently, the end cover nuts of water pumps are heavy and large in size, making it difficult for workers to rotate them by hand (using a special hydraulic wrench throughout the process is very time-consuming). It often takes two people 20 minutes to replace one nut. Utility Model Content

[0003] The purpose of this utility model is to provide a universal wrench for quick disassembly and assembly of the end cover nut of a feedwater pump in a thermal power plant, so as to solve the technical problems existing in the prior art.

[0004] The above objectives are achieved through the following technical solutions:

[0005] A universal wrench for quick disassembly and assembly of end cover nuts for water pumps in thermal power plants comprises an outer turntable and an inner sleeve. The inner sleeve is threadedly connected to the outer turntable. Three sets of circumferentially arranged backing plates are inserted into the outer side of the inner sleeve. The crossbars of the portal frame of the backing plates are located in the arc-shaped notch of the outer turntable. The top of the inner sleeve is welded to the operating handle.

[0006] The aforementioned universal wrench for quick disassembly and assembly of end cover nuts for water pumps in thermal power plants has an outer rotating disc that is a circular disc with three arc-shaped notches on its end face.

[0007] The aforementioned universal wrench for quick disassembly and assembly of end cover nuts for water pumps in thermal power plants includes an operating handle comprising a Z-shaped steel pipe. Two uprights are welded to the lower end of the Z-shaped steel pipe, and a rotating sleeve is fitted onto the upper end of the Z-shaped steel pipe.

[0008] The aforementioned universal wrench for quick disassembly and assembly of end cover nuts for water pumps in thermal power plants includes a support frame comprising a square plate and a gantry frame, wherein the gantry frame is welded to the square plate. Beneficial effects

[0009] 1. This utility model can be fitted onto the cover nut. By adjusting the position of the backing plate, the square plate of the backing plate can abut against the side of the cover nut. In this way, the three portal frames can clamp three sides of the cover nut. The cover nut can be loosened or tightened by hand operating the handle, which can assist maintenance personnel in quickly rotating and disassembling the nut.

[0010] 2. The position of the gantry frame of this utility model can be adjusted, making it suitable for the installation and disassembly of cover nuts of different sizes. Attached Figure Description

[0011] Appendix Figure 1This is a perspective view of the present invention;

[0012] Appendix Figure 2 This is a schematic diagram of the inner sleeve structure;

[0013] Appendix Figure 3 This is a schematic diagram of the outer turntable;

[0014] Appendix Figure 4 This is a structural schematic diagram of a portal frame;

[0015] Appendix Figure 5 This is a schematic diagram of the structure of this utility model in use;

[0016] Appendix Figure 6 It is attached Figure 5 Enlarged view of part A;

[0017] In the diagram: 1. Operating handle; 2. Outer turntable; 3. Inner sleeve; 4. Backing plate; 5. Water pump end cover; 6. Cover nut; 21. Hand grip; 22. Internal thread; 23. Arc-shaped notch; 24. Circular turntable; 31. Rotating sleeve; 32. Z-shaped steel pipe; 33. Upright pole; 34. Cylinder; 35. External thread; 36. Through hole; 41. Portal frame; 42. Square plate. Detailed Implementation

[0018] Reference Figures 1-4 A universal wrench for quick disassembly and assembly of end cover nuts for water pumps in thermal power plants is provided. It comprises an outer turntable 2 and an inner sleeve 3. The inner sleeve is threadedly connected to the outer turntable. Three sets of circumferentially arranged backing plates 4 are inserted into the outer side of the inner sleeve. The crossbars of the portal frame of the backing plate are located in the arc-shaped notch 23 of the outer turntable. The top of the inner sleeve is welded to the operating handle 1.

[0019] The outer turntable is a circular turntable 24. The inner ring surface of the circular turntable has an internal thread 22. The end face of the circular turntable has three arc-shaped notches, which are arranged at an angle.

[0020] The operating handle includes a Z-shaped steel pipe 32, with two uprights 33 welded to the lower end of the Z-shaped steel pipe. The uprights are welded to the outer ring surface of the inner sleeve, and a rotating sleeve 31 is fitted onto the upper end of the Z-shaped steel pipe.

[0021] The backrest frame includes a square plate 42 and a portal frame 42. The portal frame is welded to the square plate. The inner sleeve has two round holes at the position of each backrest frame. The portal frame includes two vertical round rods and a horizontal rod. The round holes slide with the vertical round rods. The horizontal rod is a horizontal round rod located in the arc-shaped notch. The outer ring surface of the inner sleeve has an external thread 35 that matches the internal thread of the outer turntable.

[0022] Working principle: When using it, refer to... Figures 5-6 First, the device is fitted onto the cover nut 6 of the water pump end cover 5. Then, the position of the back plate needs to be adjusted. The thickness of the outer turntable is half the distance between the two vertical round rods of the portal frame. Since the outer turntable and the inner sleeve are threadedly connected, the outer turntable needs to be rotated when adjusting the position of the back plate. When the outer turntable rotates, its front and back positions will change due to the threaded engagement. Therefore, the thickness of the outer turntable is set to half the distance between the two vertical round rods of the portal frame to leave room for rotation. Multiple hand grips 21 are welded on the outer ring surface of the outer turntable. By holding the grip rod and rotating the outer turntable, the crossbar of the back plate moves at the position of the arc notch, thus causing the back plate to slide, thereby adjusting the position of the back plate. Adjust it until the square plate of the back plate abuts against the side of the cover nut, thus clamping the cover nut. Then, hold the rotating sleeve and drive the device to rotate through the Z-shaped steel pipe, thereby disassembling the cover nut.

Claims

1. A universal wrench for quick disassembly and assembly of end cover nuts for feedwater pumps in thermal power plants, characterized in that: Its composition It includes an outer turntable and an inner sleeve. The inner sleeve is threadedly connected to the outer turntable. Three sets of circumferentially arranged backing plates are inserted into the outer side of the inner sleeve. The crossbars of the portal frame of the backing plates are located in the arc-shaped notch of the outer turntable. The top of the inner sleeve is welded to the operating handle.

2. A universal wrench for quick disassembly and assembly of end cover nuts for power plant feedwater pumps according to claim 1, characterized in that: The outer turntable is a circular turntable, and the end face of the circular turntable has three arc-shaped notches.

3. A universal wrench for quick disassembly and assembly of end cover nuts for power plant feedwater pumps according to claim 2, characterized in that: The operating handle comprises a Z-shaped steel pipe, with two uprights welded to the lower end of the Z-shaped steel pipe and a rotating sleeve fitted to the upper end of the Z-shaped steel pipe.

4. A universal wrench for quick disassembly and assembly of end cover nuts for thermal power plant feedwater pumps according to claim 3, characterized in that: The backrest frame includes a square plate and a portal frame, with the portal frame welded to the square plate.

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