Electric grounding device for underground construction and construction method thereof

Abstract

The invention discloses an electric grounding device for underground construction and a construction method thereof, and belongs to the field of underground engineering. The device comprises a fixed sleeve and a conducting rod body, at least two openings are formed in the bottom of the side face of the fixed sleeve, a conical connector is arranged at the bottom of the conducting rod body, and a fixing mechanism for fixing the fixed sleeve and the conducting rod body together is arranged at the top of the conducting rod body. When the method is used for construction, a drill hole perpendicular to a rock mass is drilled firstly, then the top of the conducting rod body is inserted into the fixing sleeve and extends out of the top of the fixing sleeve, then the locking nut is rotated to enable the conical connector to be squeezed into the opening of the fixing sleeve, a fragment formed by the opening is inserted into the hole bottom of the drill hole to be fixed, and then the locking nut is screwed down. After the locking nut is fixed, the grounding wire is sleeved into the top threaded section of the conductive rod body to be fixed, and effective grounding is completed. By simply improving the grounding device, the grounding efficiency can be enhanced and the grounding strength can be improved under the condition that the original construction mode and the existing construction difficulty are not changed.

Description

Technical Field

[0001] The invention belongs to the technical field of underground engineering, and more specifically, relates to an electric grounding device for underground construction and a construction method thereof. Background Art

[0002] Temporary use of electricity is common during underground construction, especially during tunnel excavation. Usually, underground grounding uses a pneumatic drill to drill a hole, and then uses an anchor rod to insert into the ground as a conductive carrier. However, due to the quality of the pneumatic drill and the diameter of the anchor rod, the anchor rod may not be able to effectively contact the drill hole in the hole or overlap in the upper part, the actual grounding depth does not meet the standard, and the grounding is virtual.

[0003] The Chinese patent application number is CN202210079866.0, and the patent document with the publication date of May 13, 2022 discloses an electrical engineering grounding device, including a sleeve, two slide grooves are rotatably equipped with screws, and a conductive rod slidably assembled in the sleeve is fixedly connected between the two sliders. The upper ends of the two screws extend out of the sleeve and are equipped with a transmission mechanism. The mounting seat is provided with a mounting groove connected to the inside of the sleeve, and a conductive tank chain is installed between the conductive block and the conductive rod. A clamping mechanism matching the conductive block is provided on the upper side of the mounting seat. A screw rod is installed vertically in the cavity, and the other ends of the four connecting rods are hinged with fixed blocks. The screw rod is sleeved with the conductive rod and the sleeve. Although this scheme can facilitate the staff to insert the conductive rod into the ground, its scheme is relatively complicated and costly.

[0004] The Chinese patent application number is CN201810777437.4, and the patent document with the publication date of August 16, 2024 discloses a grounding device for electric power equipment. Through the coordinated arrangement of the grounding rod, the connecting plate and the grounding sleeve, the integral component composed of the grounding rod, the connecting plate and the grounding sleeve can contact the soil in the gap between the connecting plates, and transmit the current to the earth. The contact area is large and the conduction effect is good. Through the arrangement of the spiral sheet, the integral component composed of the grounding rod, the grounding sleeve and the protective sleeve can be easily entered into the soil, and the protective sleeve entering the soil is not easily disturbed and skewed. Through the coordinated arrangement of the protective sleeve, the pressure sleeve, the positioning screw and the shielding sleeve, the integral component composed of the internal grounding rod, the connecting plate and the grounding sleeve can be protected from contacting the soil outside the protective sleeve that has become relatively moist after rain. This scheme can protect the integral component composed of the grounding rod, the connecting plate and the grounding sleeve, but it is difficult to achieve rapid fixing of the sleeve, and the grounding efficiency is not ideal. Summary of the invention

[0005] 1. Problems to be solved

[0006] In view of the problem that the existing electrical grounding devices have a relatively complex structure or the sleeve is difficult to quickly fix during underground construction, the present invention provides an electrical grounding device for underground construction and a construction method thereof. By simply improving the structure of the grounding device, the grounding efficiency can be enhanced and the grounding strength can be improved without changing the original construction method and the existing construction difficulty.

[0007] 2. Technical solution

[0008] To solve the above problems, the present invention adopts the following technical solutions.

[0009] An electric grounding device for underground construction comprises a fixed sleeve and a conductive rod; the fixed sleeve is provided with at least two openings at the bottom of the side surface; the conductive rod has a conical joint at the bottom and a fixing mechanism for fixing the fixed sleeve and the conductive rod together at the top.

[0010] As a further improvement of the technical solution, the fixing mechanism includes a section of external thread arranged on the outside of the top of the conductive rod body, and a locking nut matching the external thread.

[0011] As a further improvement of the technical solution, the locking nuts have at least two.

[0012] As a further improvement of the technical solution, the length of the external thread is 200 mm.

[0013] As a further improvement of the technical solution, the diameter of the fixed sleeve is 22 mm and the length is 2200 mm.

[0014] As a further improvement of the technical solution, the diameter of the conductive rod is 14 mm and the length is 2500 mm.

[0015] As a further improvement of the technical solution, there are three openings, which are evenly spaced along the circumference of the fixed sleeve.

[0016] As a further improvement of the technical solution, the conductive rod and the locking nut are made of copper.

[0017] As a further improvement of the technical solution, the fixing sleeve is made of copper.

[0018] A construction method for the above-mentioned electrical grounding device for underground construction. During construction, a borehole perpendicular to the rock mass is first drilled, and then the top of the conductive rod is inserted into the fixed sleeve and extends out of the top of the fixed sleeve. Then, the conical joint is squeezed into the opening of the fixed sleeve by rotating the locking nut, so that the segment formed by the opening can be inserted into the bottom of the borehole for fixation, and then the locking nut is tightened. After the locking nut is fixed, the grounding wire is inserted into the top threaded section of the conductive rod and fixed to complete effective grounding.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The present invention provides an electric grounding device for underground construction and a construction method thereof. An opening is provided at the bottom of a fixed sleeve to form a segment, and a conductive rod body with a conical joint is provided to match the segment. When the conductive rod body is inserted into the fixed sleeve and the two are locked and fixed, the conical joint will squeeze into the bottom of the fixed sleeve and push the segment outward, so that the segment is inserted into the bottom of the drill hole and fixed. In this way, the grounding efficiency is effectively enhanced and the grounding strength is improved without changing the original construction method and the existing construction difficulty.

[0022] (2) The present invention provides an underground construction electrical grounding device and a construction method thereof. The structural improvement of the fixed sleeve and the conductive rod body is relatively simple. While ensuring efficient grounding, only a small improvement cost is required, and the device has good practicability and economic production value.

[0023] (3) The present invention provides an electric grounding device for underground construction and a construction method thereof, wherein a plurality of openings are provided to increase the number of segments, thereby increasing the fixing capacity of the fixing sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the fixed sleeve and the conductive rod body of the present invention;

[0025] In the figure: 1. fixing sleeve; 2. opening; 3. conical joint; 4. conductive rod; 5. locking nut. DETAILED DESCRIPTION

[0026] Exemplary embodiments of the present invention are described in detail below. Although these exemplary embodiments are described in sufficient detail to enable those skilled in the art to implement the present invention, it should be understood that other embodiments may be implemented and various changes may be made to the present invention without departing from the spirit and scope of the present invention. The more detailed description of the embodiments of the present invention below is not intended to limit the scope of the claimed invention, but is merely for illustration and does not limit the description of the features and characteristics of the present invention, in order to propose the best mode for performing the present invention, and is sufficient to enable those skilled in the art to implement the present invention. Therefore, the scope of the present invention is limited only by the appended claims.

[0027] Example 1

[0028] The invention discloses an underground construction power grounding device, which is used for grounding work when temporary power is used in underground construction. The specific structure and technical effect thereof are described in detail below.

[0029] like Figure 1As shown, the device includes a fixed sleeve 1 and a conductive rod 4. The fixed sleeve 1 has at least two openings 2 at the bottom of the side. The conductive rod 4 has a conical joint 3 at the bottom, and a fixing mechanism for fixing the fixed sleeve 1 and the conductive rod 4 together at the top. Specifically, the fixing mechanism includes a section of external thread arranged on the outside of the top of the conductive rod 4, and at least two locking nuts 5 matching the external thread.

[0030] In this embodiment, the length of the external thread is 200 mm. The diameter of the fixed sleeve 1 is 22 mm and the length is 2200 mm. The diameter of the conductive rod 4 is 14 mm and the length is 2500 mm. There are three openings 4, which are evenly spaced along the circumference of the fixed sleeve 1. This arrangement of multiple openings 2 increases the number of segments and can increase the fixing ability of the fixed sleeve 1.

[0031] In addition, when the grounding conductivity in the construction area is not strong, the conductive rod 4 and the locking nut 5 are made of copper to increase the conductivity and ensure that the grounding resistance meets the requirements. At the same time, the fixed sleeve 1 is also made of copper to further enhance the conductivity of the device.

[0032] During construction, first drill a hole perpendicular to the rock mass, then insert the top of the conductive rod 4 into the fixed sleeve 1 and extend it out of the top of the fixed sleeve 1, then rotate the locking nut 5 to squeeze the conical joint 3 into the opening 2 of the fixed sleeve, so that the slices formed by the opening 2 are stretched and inserted into the bottom of the hole for fixing, and then tighten the locking nut 5. After the locking nut 5 is fixed, the grounding wire is inserted into the top threaded section of the conductive rod to complete effective grounding. In this way, without changing the original construction method and the existing construction difficulty, the grounding efficiency and grounding strength are effectively enhanced.

[0033] In summary, the present embodiment of an underground construction electrical grounding device and its construction method can enhance the grounding efficiency and improve the grounding strength without changing the original construction method and existing construction difficulty by simply improving the structure of the grounding device. The structural improvement of the fixed sleeve and the conductive rod body is relatively simple, and only requires a small improvement cost while ensuring efficient grounding, and has good practicability and economic production value.

[0034] The examples described in the present invention are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field should all fall within the protection scope of the present invention.

Claims

1. An electrical grounding device for underground construction, characterized in that: The invention comprises a fixed sleeve (1) and a conductive rod (4); the fixed sleeve (1) is provided with at least two openings (2) at the bottom of the side surface; the conductive rod (4) has a conical joint (3) at the bottom and a fixing mechanism for fixing the fixed sleeve (1) and the conductive rod (4) together at the top.

2. An electrical grounding device for underground construction according to claim 1, characterized in that: The fixing mechanism comprises a section of external thread arranged on the outside of the top of the conductive rod body (4), and a locking nut (5) matching the external thread.

3. An electrical grounding device for underground construction according to claim 2, characterized in that: The locking nuts (5) are provided with at least two.

4. An electrical grounding device for underground construction according to claim 2, characterized in that: The length of the external thread is 200 mm.

5. An electrical grounding device for underground construction according to claim 2, characterized in that: The fixed sleeve (1) has a diameter of 22 mm and a length of 2200 mm.

6. An electrical grounding device for underground construction according to claim 5, characterized in that: The conductive rod (4) has a diameter of 14 mm and a length of 2500 mm.

7. An electrical grounding device for underground construction according to any one of claims 2 to 6, characterized in that: There are three openings (4) which are evenly spaced along the circumference of the fixed sleeve (1).

8. An electrical grounding device for underground construction according to any one of claims 2 to 6, characterized in that: The conductive rod (4) and the locking nut (5) are made of copper.

9. An electrical grounding device for underground construction according to claim 8, characterized in that: The fixed sleeve (1) is made of copper.

10. A construction method for an underground construction electric grounding device according to any one of claims 2 to 9, characterized in that: During construction, a borehole perpendicular to the rock mass is first drilled, and then the top of the conductive rod body (4) is inserted into the fixing sleeve (1) and extends out of the top of the fixing sleeve (1), and then the conical joint (3) is squeezed into the opening (2) of the fixing sleeve (1) by rotating the locking nut (5), so that the segment formed by the opening (2) can be inserted into the bottom of the borehole for fixing, and then the locking nut (5) is tightened. After the locking nut (5) is fixed, the grounding wire is inserted into the top threaded section of the conductive rod body (4) for fixing, thereby completing effective grounding.

Images