A labor-saving wrench for working in confined spaces

Abstract

A labor-saving wrench for confined space operations. When operating valve handwheels in confined spaces, the limited space makes suitable F-type wrenches too small, resulting in excessive effort and time consumption. This invention includes: a transmission box, one end of which has a shovel top, and the other end has a wire lug plate. The shovel top is connected to a dial wheel assembly via bearings, and the wire lug plate is connected to a drive sprocket shaft via bearings. A drive sprocket is fixed on the drive sprocket shaft, and the drive sprocket is connected to the driven sprocket of the dial wheel assembly via a chain drive. This invention is used for confined space operations.

Description

Technical Field

[0001] This utility model relates to a labor-saving wrench for working in confined spaces. Background Technology

[0002] Many valves in power plants are located in confined spaces. When it is necessary to operate the valves, the valve handwheel needs to be operated. However, operating the valve handwheel in a confined space is too strenuous and time-consuming because the space is small and the applicable F-shaped wrench is too small. Utility Model Content

[0003] The purpose of this invention is to solve the above-mentioned problems and provide a labor-saving wrench for working in confined spaces.

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

[0005] A labor-saving wrench for confined space operations comprises a transmission box, one end of which has a shovel top and the other end has a wire lug plate. The shovel top is connected to a dial wheel assembly via a bearing, and the wire lug plate is connected to a drive sprocket shaft via a bearing. A drive sprocket is fixed on the drive sprocket shaft, and the drive sprocket is connected to the driven sprocket of the dial wheel assembly via a chain drive.

[0006] The aforementioned labor-saving wrench for confined space operations includes a dial wheel assembly comprising a square plate, three insert rods fixed to the lower surface of the square plate, a fixed shaft fixed to the upper surface of the square plate, and the side of the square plate being fixed to the driven sprocket via a connecting rod.

[0007] The aforementioned labor-saving wrench for operation in confined spaces includes two first guide sprockets fixed inside the transmission box at the top of the shovel, and two second guide sprockets fixed inside the transmission box at the wire nose plate.

[0008] The aforementioned labor-saving wrench for working in confined spaces has a handle fixed to the drive sprocket. Beneficial effects

[0009] 1. This utility model uses a dial wheel assembly and a drive sprocket to shift the point of force application from a limited space to other locations. By using the dial wheel assembly and drive sprocket through chain transmission, the valve handwheel can be operated, thereby improving the efficiency of valve operation and reducing operation time. Attached Figure Description

[0010] Appendix Figure 1 This is the front view of this utility model;

[0011] Appendix Figure 2 This is a rear view of the present invention;

[0012] Appendix Figure 3 This is a side view of the present invention;

[0013] Appendix Figure 4 This is a schematic diagram of the internal structure of this utility model;

[0014] Appendix Figure 5 This is a schematic diagram of the structure of this utility model in use;

[0015] In the diagram: 1. Chain; 2. Shovel top; 3. Transmission box; 4. Drive sprocket; 5. Handle; 6. Dial wheel assembly; 7. Line nose plate; 8. First guide sprocket; 9. Second guide sprocket; 10. First guide sprocket shaft; 11. Second guide sprocket shaft; 12. Drive sprocket shaft; 13. Disc wrench; 61. Driven sprocket; 62. Square plate; 63. Insert rod; 64. Connecting rod; 65. Fixed shaft. Detailed Implementation

[0016] Reference Figures 1-4 A labor-saving wrench for confined space operations comprises a transmission box 3, which is a hollow square tube. One end of the transmission box has a shovel top 2, and the other end has a wire nose plate 7. The shovel top is connected to the dial wheel assembly 6 via bearings, and the wire nose plate is connected to the drive sprocket shaft 12 via bearings. A drive sprocket 4 is fixed on the drive sprocket shaft, and the drive sprocket and the driven sprocket 61 of the dial wheel assembly are driven by a chain 1.

[0017] The dial wheel assembly includes a square plate 62, three insert rods 63 are fixed on the lower surface of the square plate, a fixed shaft 65 is fixed on the upper surface of the square plate, and the side of the square plate is fixed to the driven sprocket 61 by a connecting rod 64.

[0018] A handle 5 is fixed on the drive sprocket;

[0019] The transmission box contains two first guide sprockets 8 fixed at the top of the shovel, and two second guide sprockets 9 fixed at the nose plate.

[0020] Both first guide sprockets have a first guide sprocket shaft 10 at their center, and the first guide sprocket shaft is connected to the transmission box through a bearing. Both second guide sprockets have a second guide sprocket shaft 11 at their center, and the second guide sprocket shaft is connected to the transmission box through a bearing. Both the first guide sprockets and the second guide sprockets guide and drive the chain.

[0021] When using, refer to Figure 5 Hold the transmission box in one hand and the handle in the other. Align the three inserts of the dial wheel assembly with the center of the spokes of the disc valve and insert them. Then rotate the drive sprocket. Through the chain drive, the drive sprocket rotates, thereby operating the disc wrench.

Claims

1. A labor-saving wrench for working in confined spaces, characterized by: Its components include a transmission box, one end of which has a shovel top and the other end has a wire nose plate. The shovel top is connected to the dial wheel assembly via a bearing, and the wire nose plate is connected to the drive sprocket shaft via a bearing. A drive sprocket is fixed on the drive sprocket shaft, and the drive sprocket and the driven sprocket of the dial wheel assembly are driven by a chain.

2. The labor-saving wrench for confined space operations according to claim 1, characterized in that: The dial wheel assembly includes a square plate, three insert rods are fixed on the lower surface of the square plate, a fixed shaft is fixed on the upper surface of the square plate, and the side of the square plate is fixed to the driven sprocket by a connecting rod.

3. The labor-saving wrench for confined space operations according to claim 2, characterized in that: The transmission box contains two first guide sprockets fixed at the top of the shovel, and two second guide sprockets fixed at the nose plate.

4. A labor-saving wrench for working in confined spaces according to claim 3, characterized in that: A handle is fixed to the drive sprocket.

Images