Auxiliary tool and method for mounting and dismounting grounding pile

Abstract

The auxiliary tool mainly comprises a force transmission part, a force application part is arranged on the force transmission part in a sliding mode, and the force application part is limited and stressed through limiting parts at the upper end and the lower end of the force transmission part; and a bayonet mechanism is mounted at the bottom of the limiting part at the lower end of the force transmission part, and is connected with the grounding pile. According to the auxiliary tool and method for mounting and dismounting the grounding pile, the construction efficiency of a distribution network can be improved to a great extent, and potential safety hazards can be reduced to a great extent.

Description

Technical Field

[0001] The invention relates to a grounding pile, in particular to an auxiliary tool and method for installing and removing a grounding pile. Background Art

[0002] A certain area is located in a hilly area with many mountains and forests. The soil is mixed with rocks and the soil is hard and compacted. Especially in hilly and mountainous areas, it is difficult to drill holes in the land. The installation and removal of grounding piles are very frequent in the construction of distribution networks. According to statistics, the distribution network in this area has been transformed on a large scale from 2017 to 2020, with a total of 677.3 kilometers of 10kV and below lines built, 665 new substations, and 681 old substations renovated. There are more than 600 construction projects per year. According to the project content, the installation and removal of grounding piles alone is as high as more than 2,000 times per year. According to the "Construction and Acceptance Specifications for Grounding Devices for Electrical Installation Engineering", the depth of grounding piles into the ground is ≥0.6 meters, and the insulation strength and quality of grounding piles must meet the requirements of safe electricity use. At this stage of construction, the installation of grounding piles is basically hammered into the soil with a hammer. The installation process relies purely on manual construction, which poses the following safety hazards: 1. The labor intensity is high and personnel are easily injured. 2. The grounding pile body is easily damaged and bent under the impact of gravity, affecting the grounding discharge performance and endangering the personal safety of the power grid. 3. The installation and disassembly speed is greatly affected by the environmental soil. 4. The construction progress is slow and the work efficiency is low.

[0003] Under the background of high-quality, high-standard and high-density distribution network safety construction, the progress and construction quality of grounding pile installation and removal will directly affect the safety of power grid and personnel as well as the progress of the project. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an auxiliary tool and method for installing and removing grounding piles, which can greatly improve the efficiency of distribution network construction and reduce safety hazards.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A grounding pile installation and removal auxiliary tool comprises a force transmission part, on which a force applying part is slidably provided, and the force applying part is limited and stressed by limiting parts at the upper and lower ends of the force transmission part; a bayonet mechanism is installed at the bottom of the limiting part at the lower end of the force transmission part, and the bayonet mechanism is connected to the grounding pile.

[0006] The force transmission part is a rod body, and the force application part is freely sleeved on the rod body through a through hole.

[0007] The force applying part is a hand hammer.

[0008] The limiting part comprises an upper end and a lower end, and the upper end and the lower end are threadedly connected to the force transmission part and are tightened by radial screws.

[0009] The upper end and the lower end are both circular plates, and the area of ​​the circular plates is larger than the area of ​​the force transmission part.

[0010] A handle is installed on one side of the upper end.

[0011] The bayonet mechanism comprises a cylinder with an opening at the lower end, the lower end of the first slot is flush with the opening of the cylinder, and the upper end extends a certain length along the axial direction; the upper end of the second slot is connected to the first slot, and the lower end is spaced from the first slot to form a hook.

[0012] A method for installing and removing a grounding pile comprises the following steps: Step 1: Insert the grounding stake from the first notch of the bayonet mechanism and lock it in the second notch; Step 2: Select a fixed position of the grounding pile on the ground, align the device with the grounding pile vertically and drive it in, hold the handle with one hand and the force-applying part with the other hand, pull the force-applying part up for a distance and then smash it down to the lower end, and use inertia to repeat this action until the grounding pile is effectively driven into the target position; Step 3: After the work is completed, remove the grounding pile, then hit the upper end with a hammer, and use inertia to gradually pull out the grounding pile.

[0013] The present invention provides a grounding pile installation and removal auxiliary tool and method, which has the following technical effects: 1) The traditional installation of grounding piles requires at least two people. One of them holds the grounding pile and aligns it with the driving point. He is mainly responsible for stabilizing the pile body and keeping it straight to avoid it from being tilted. The other person is responsible for swinging a sledgehammer to hit the top end of the grounding pile downwards to drive it into the ground. The removal operation requires the operator to pull it out with force or use a sledgehammer to hit the end upwards to drive the grounding pile out of the ground. Possible risks during the operation include: 1. Sledgehammers are usually heavy and it is difficult for people to swing them; 2. During the installation operation, the swing range and trajectory of the sledgehammer are different each time and can only be controlled by the operator himself. If the striking point is not aimed or the swing range is fixed, it may be operated incorrectly and injure another person or surrounding personnel; 3. Affected by the environment and soil quality, it is very time-consuming and laborious to drive and remove grounding piles in places with hard soil; 4. If the operation is too forceful, the grounding pile may be damaged.

[0014] This device can connect the grounding pile with the main body as one, and only one person is required to operate it. The force-applying part cleverly uses the inertia principle. During the removal and installation operations, it only needs to slide the force-applying part up and down to collide with the limit end. The generated inertial force can quickly drive the grounding pile into the ground or pull it out, and it is more labor-saving. At the same time, the range of movement of the force-applying part is controlled by the limit end, avoiding the risk of instability caused by using a sledgehammer.

[0015] 2) The hammer impact force generated by this device is mainly borne by the limit end of the device. The grounding pile body is connected to the bayonet device and will not bear too much force. The chromium-molybdenum steel used in this device is hard, and compared with operating a sledgehammer, it does not require too much force to operate the force-applying part, so it will not cause damage to the grounding pile. The impact force caused by the force-applying part mainly drives the entire device and uses inertia to complete the operation.

[0016] 3) The function of the bayonet mechanism provided in the device is to connect the grounding pile with the device. Firstly, it is convenient for one person to operate, and secondly, it can utilize the principle of inertia and use the impact force caused by the force-applying part to drive the entire device.

[0017] 4) By using chromium-molybdenum steel, the unit price of chromium-molybdenum steel is lower than that of alloy steel, and the performance is better than that of carbon steel.

[0018] 5) By adopting a gourd-shaped hand hammer, the contact surface of the action point is increased on the basis of the "I"-shaped operating head, and the impact force on the end head is minimized; the inertia is greater, and the sliding operating head is more labor-saving when operating.

[0019] 6) Patent application number "201721470900.8" ​​"A special hammer for disassembling transmission pins", The differences between the present application and the comparative document are as follows: 1) The present application and the comparative document have different usage scenarios and objects. The device in the comparative document is specifically used for disassembling transmission pins, while the present application is mainly used for installing and disassembling grounding piles that are larger and longer than the pins; 2) The connection part between the device and the pin in the comparative document is mainly customized according to the mechanical characteristics of the pin, while the connection part between the device and the grounding pile is a special clip for the grounding pile, which can facilitate the installation and disassembly of the grounding pile; 3) The present application only requires one person to operate, which is more labor-saving than the device mentioned in the comparative document.

[0020] 7) The traditional construction process will cause damage to the grounding piles, with an average damage rate of 11.11%, especially when dismantling the grounding piles, the damage rate reaches 100%; the traditional construction process takes an average of 28.8 minutes, of which the correction time is an average of 20.75 minutes, accounting for 72%, and the operation time is an average of 8.05 minutes, accounting for 28%; the single installation and removal time of the grounding pile using this device is ≤9 minutes; the damage rate of the grounding pile is ≤2%. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is an overall schematic diagram of the present invention.

[0022] Figure 2 It is a schematic diagram of the bayonet mechanism in the present invention.

[0023] Figure 3 It is a schematic diagram of the handle in the present invention.

[0024] Figure 4 Schematic diagram of the connection between the bayonet mechanism and the grounding pile in the present invention (a represents when the grounding pile is pulled out).

[0025] Figure 5 Schematic diagram of the connection between the bayonet mechanism and the grounding pile in the present invention (b represents when the grounding pile is driven in).

[0026] In the figure: force applying part 1, force transmitting part 2, limiting part 3, bayonet mechanism 4, handle 5, upper end 6, lower end 7, long side 8 of bayonet mechanism, short side 9, force-bearing handle 10, handle screw 11, and grounding pile 12. DETAILED DESCRIPTION

[0027] like Figure 1 As shown, an auxiliary tool for installing and removing a grounding pile comprises a force-applying part 1, a force-transmitting part 2, a limiting part 3, a bayonet mechanism 4 and a handle 5. The limiting parts 3 are arranged at the upper and lower ends of the force-transmitting part 2, the force-applying part 1 is sleeved on the force-transmitting part 2 between the two limiting parts 3, and the lower end of the limiting part 3 at the lower end is provided with a bayonet mechanism 4, which is connected to the grounding pile.

[0028] like Figure 1 As shown, the force applying part 1 is a hand-held part, and the force applying part 1 is a gourd-shaped hammer, with a diameter of 6.5cm+3.5cm, a length of 17cm, and a material of chrome-molybdenum steel. A single person holds the hammer and moves up and down on the force transmission part 2. The force applying part 1 acts on both ends of the force transmission part 2 up and down to obtain an upward or downward force, driving the grounding pile to be pulled out of the ground upward or hammered into the ground downward, which is powerful and saves time and effort.

[0029] like Figure 1 As shown, the force transmission part 2 is a cylindrical connecting rod with a diameter of 2 cm and a length of 63.5 cm+1.5 cm*2, made of chrome-molybdenum steel, with reasonable force conduction, small friction, low price, good metal performance and easy replacement and maintenance. The force application part 1 is slidably arranged on the force transmission part 2.

[0030] like Figure 1 As shown, the limiting part 3 includes an upper end 6 and a lower end 7, and the upper end 6 and the lower end 7 are circular ends, and a threaded hole is provided in the center of the circular end, which can be threadedly connected with the force transmission part 2. A threaded hole is radially opened at the lower end 7, and the screw is screwed into the threaded hole and pressed against the limiting hole of the force transmission part 2, so that the lower end 7 can be fastened and connected to avoid loosening. A threaded hole is radially opened at the upper end 6, and the handle 5 is screwed into the threaded hole through the screw and pressed against the limiting hole of the force transmission part 2, so that the upper end 6 can be fastened and connected to avoid loosening. At the same time, the handle 5 is also convenient to operate.

[0031] The upper end 6 has a diameter of 6.5 cm and a thickness of 1.5 cm, and the lower end 7 has a diameter of 6.5 cm and a thickness of 1.5 cm. The highest point and the lowest point reached when the force-applying part 1 moves up and down act on the upper end 6 and the lower end 7 of the force-transmitting part 2, respectively. The highest point or the lowest point is used as the point of force application, and the contact surface is large enough, so that deformation is not likely to occur and the connection is reliable.

[0032] The bayonet mechanism 4 is an inverted J-shaped sleeve interface with a diameter of 3 cm and a long side of 812.5 cm. The bayonet mechanism 4 includes a cylinder 4.1 with an opening at the lower end, a first notch 4.2 whose lower end is flush with the opening of the cylinder 4.1 and whose upper end extends a certain length along the axial direction; a second notch 4.3 whose upper end is connected to the first notch 4.2 and whose lower end is spaced from the first notch 4.2 and forms a hook. The end of the grounding pile slides into the first notch 4.2 of the bayonet mechanism 4, and the grounding pile is clamped at the hook to be reliably connected to the tool.

[0033] The bayonet mechanism 4 is fixedly welded to the lower end of the lower end head 7. The upper part of the bayonet mechanism 4 is a solid structure.

[0034] When the grounding pile is driven into the ground, the solid end surface of the bayonet mechanism 4 contacts the main rod end surface of the grounding pile 12 .

[0035] The first notch 4.2 has a width of about 0.75-0.8 cm and a length of about 12.5 cm, and its function is to facilitate the grounding pile to slide into the slot. The second notch 4.3 has a width of about 0.75-0.8 cm and a length of about 8.5 cm, and its function is to allow the upper end to contact with the protruding part of the grounding pile when the device is hammered downward, clamp the grounding pile, and drive it into the ground; when the device is hammered upward, its lower end to contact with the protruding part of the grounding pile, clamp the grounding pile, and pull it out.

[0036] Preferably, the surface of the handle 5 is embossed and polished to have sufficient friction.

[0037] A grounding pile installation and removal auxiliary tool and method, comprising the following steps: s1. Insert the grounding post from the first notch 4.2 of the bayonet mechanism 4 and clamp it in the hook of the second notch 4.3.

[0038] s2. Select a fixed position of the grounding pile on the ground, align the device with the grounding pile vertically at the driving point, hold the handle 5 with one hand and the hammer with the other hand, pull the hammer up a distance and then smash it down to the lower end 7, use inertia to repeat this action until the grounding pile is effectively driven into the target position.

[0039] s3. After the work is completed, the grounding pile is removed, and the upper end 6 is hit upward with a hand hammer, and the grounding pile is gradually pulled out by inertia.

Claims

1. A grounding pile installation and removal auxiliary tool, characterized by: The invention comprises a force transmission part (2), a force application part (1) being slidably provided on the force transmission part (2), the force application part (1) being limited and subjected to force by limit parts (3) at the upper and lower ends of the force transmission part (2); a bayonet mechanism (4) is installed at the bottom of the limit part (3) at the lower end of the force transmission part (2), and the bayonet mechanism (4) is connected to a grounding pile.

2. The grounding pile installation and removal auxiliary tool according to claim 1, characterized in that: The force transmission part (2) is a rod body, and the force application part (1) is freely sleeved on the rod body through a perforation.

3. The grounding pile installation and removal auxiliary tool according to claim 2, characterized in that: The force applying part (1) is a hand hammer.

4. The grounding pile installation and removal auxiliary tool according to claim 1, characterized in that: The limiting portion (3) comprises an upper end head (6) and a lower end head (7), and the upper end head (6) and the lower end head (7) are threadedly connected to the force transmission portion (2) and are tightened by radial screws.

5. The grounding pile installation and removal auxiliary tool according to claim 4, characterized in that: The upper end head (6) and the lower end head (7) are both circular plates, and the area of ​​the circular plates is larger than the area of ​​the force transmission part (2).

6. The grounding pile installation and removal auxiliary tool according to claim 4, characterized in that: A handle (5) is mounted on one side of the upper end (6).

7. The grounding pile installation and removal auxiliary tool according to claim 1, characterized in that: The bayonet mechanism (4) comprises a cylinder (4.1) with an opening at the lower end; the lower end of the first notch (4.2) is flush with the opening of the cylinder (4.1) and the upper end extends a certain length along the axial direction; the upper end of the second notch (4.3) is connected to the first notch (4.2) and the lower end is spaced from the first notch (4.2) to form a hook.

8. A method for installing and removing a grounding pile according to a grounding pile installation and removal auxiliary tool according to any one of claims 1 to 7, comprising the following steps: Step 1: Insert the grounding stake (12) through the first notch (4.2) of the bayonet mechanism (4) and lock it in the second notch (4.3); Step 2: Select a fixed position of the grounding pile (12) on the ground, align the device with the grounding pile (12) vertically and drive it into place, hold the handle (5) with one hand and the force-applying part (1) with the other hand, pull the force-applying part (1) upward for a certain distance and then smash it downward to the lower end (7), and repeat this action by inertia until the grounding pile (12) is effectively driven into the target position; Step 3: After the work is completed, the grounding pile is removed by striking the upper end (6) upward with a hand hammer, and the grounding pile is gradually pulled out by inertia.

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