Grounding box and its application construction method

Abstract

The present invention relates to a grounding dark box and its application construction method. The grounding dark box comprises a box body, a mounting hole and a cover body. The box body has an opening on one side. The mounting hole is provided at the bottom of the box body opposite to the opening, and the mounting hole extends from the bottom toward a direction away from the opening; the cover body covers the opening, and the side wall of the cover body is sleeved on the side wall of the box body, and the cover body is detachably connected to the box body. During the construction of the grounding dark box, the embedded grounding flat steel is bent and welded to the transverse steel bars in the wall panel (the wall panel is not cast at this time), and then the embedded grounding flat steel is passed through the mounting hole. At this time, one end of the embedded grounding flat steel is cast in the wall panel, and the other end is located in the box body, so it will not be eroded and corroded by the external environment. The application construction method of the grounding dark box is simple to operate and suitable for popularization and application.

Description

Technical Field

[0001] The invention relates to an electric power device, in particular to a grounding box and an application construction method thereof. Background Art

[0002] Underground utility corridors often contain a large number of 110kV and 220kV power cables. Considering the safety voltage requirements when maintenance and management personnel of utility corridors touch power cables at will, the metal layer of the above power cables needs to be strictly grounded. When the electrical protection grounding and monitoring system in the utility corridor are jointly grounded, the grounding resistance is required to be no higher than 1 ohm. When the grounding resistance of the utility corridor itself does not meet the requirements, an external artificial grounding body is required.

[0003] It is often difficult to calculate the actual grounding resistance of a comprehensive pipeline corridor during the engineering design phase. From a safety perspective, grounding connection steel plates are generally pre-buried at intervals along the longitudinal direction of the pipeline corridor. After the civil construction is completed, asphalt is applied to the outside of the pre-buried grounding connection plates for corrosion protection.

[0004] However, in actual engineering applications, many pre-buried grounding connection plates do not require grounding. Since the pre-buried grounding connection steel plates are connected to the steel bars in the civil wall panels of the integrated pipeline corridor, if the outer side of the connection plate is not properly treated with anti-corrosion, it will be susceptible to chemical corrosion due to long-term contact with the soil, which will affect the overall safety of the pipeline corridor structure. Summary of the invention

[0005] Based on this, it is necessary to provide a grounding box that can protect the pre-buried grounding connection steel plate.

[0006] A grounding box, comprising:

[0007] A box body, one side of which is open;

[0008] A mounting hole is provided at the bottom of the box body opposite to the opening, and the mounting hole extends from the bottom in a direction away from the opening;

[0009] The cover body covers the opening, the side wall of the cover body is sleeved on the side wall of the box body, and the cover body is detachably connected to the box body.

[0010] In one embodiment, the mounting hole is strip-shaped, the number of the mounting holes is two, and the two mounting holes are arranged in parallel.

[0011] In one of the embodiments, a sleeve is further included, and the sleeve is sleeved at the joint between the side wall of the cover body and the side wall of the box body.

[0012] In one embodiment, the outer surface of the sleeve is higher than the outer surface of the side wall of the box body.

[0013] In one of the embodiments, a connecting groove is provided on the outer surface of the side wall of the box body, and the cover body is connected to the box body through the connecting groove.

[0014] In one embodiment, the cover body and the box body are connected by interference fit.

[0015] In one of the embodiments, it further includes a slot and an elastic gasket, wherein the slot is opened in the cover body, and the elastic gasket is located in the slot.

[0016] In one of the embodiments, a water baffle is further provided, and the water baffle is arranged around the cover body.

[0017] In one embodiment, the water retaining plate is perpendicular to the side wall of the cover body.

[0018] The application construction method of the above-mentioned grounding box includes:

[0019] Before the concrete pouring is completed after the reinforcement construction of the integrated pipe gallery is completed, the pre-buried grounding flat steel is bent and connected to the transverse steel bars in the wall panel, and then the pre-buried grounding flat steel is passed through the installation hole and fixed, and the concrete pouring is carried out;

[0020] When the embedded grounding flat steel is used for an external grounding body, the initial covering portion of the grounding box is removed, the external grounding body is welded to the embedded grounding flat steel, and then the external grounding body extends out of the replaced covering portion, and the installation is completed.

[0021] During the construction of the above-mentioned grounding box, the pre-embedded grounding flat steel is bent and welded to the transverse steel bar in the wall panel (the wall panel is not cast at this time), and then the pre-embedded grounding flat steel is passed through the installation hole. At this time, one end of the pre-embedded grounding flat steel is cast in the wall panel, and the other end is located in the closed space formed by the cover body and the box body, so it will not be eroded and corroded by the external environment. In addition, the installation hole protrudes from the box body, which can prevent mud from pouring into the grounding box when pouring concrete, ensuring the waterproof effect of the grounding box. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A standard cross-sectional view of an integrated pipe gallery applicable to a grounding device according to an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the grounding arrangement of a standard section of an integrated pipe gallery according to an embodiment of the present invention;

[0024] Figure 3 It is a structural schematic diagram of a grounding box according to an embodiment of the present invention;

[0025] Figure 4 It is a front view of a grounding box after removing the cover plate according to an embodiment of the present invention;

[0026] Figure 5 It is a structural schematic diagram of a sleeve according to an embodiment of the present invention;

[0027] Figure 6 It is a structural schematic diagram of a box cover according to an embodiment of the present invention;

[0028] Figure 7 It is a side view of the grounding dark box after removing the box cover and sleeve of one embodiment of the present invention;

[0029] Figure 8 It is a front view of a grounding box according to an embodiment of the present invention;

[0030] Fig. 9 It is a structural schematic diagram of a grounding box according to an embodiment of the present invention;

[0031] Fig.10 A partial enlarged view of a box cover according to an embodiment of the present invention;

[0032] Figure 11-14 A diagram showing an application construction method of a grounding box according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present invention are provided in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0034] like Figure 1 As shown, an underground integrated pipe gallery 1 of one embodiment includes three parallel compartments, namely a high-voltage power compartment 10, a power water supply compartment 12 and a pipeline compartment 14. The high-voltage power compartment, the power water supply compartment and the pipeline compartment are all provided with metal brackets and metal bridges. Generally, the metal brackets and metal bridges in the integrated pipe gallery, the metal outer sheath of the power cable entering the gallery, the protective earthing (PE) of the power cable for self-use, the metal casing of the monitoring equipment and the metal process pipelines, etc., all need to be grounded.

[0035] like Figure 2 As shown, generally, the wall panels of the integrated pipe gallery are generally provided with transverse steel bars 102. For the purpose of grounding, the inner and outer wall surfaces of the integrated pipe gallery are pre-buried with grounding connection steel plates 104. The grounding box of the present invention is used to protect the above-mentioned grounding connection steel plates to prevent the grounding connection steel plates from being eroded or corroded, thereby ensuring the overall safety of the integrated pipe gallery. The grounding box will be introduced in detail below in conjunction with the accompanying drawings.

[0036] See also Figure 3The grounding dark box 20 of one embodiment includes a box body 200, a mounting hole 210 and a cover body 220. The box body 200 has an opening on one side, and the mounting hole 210 is provided at the bottom of the box body 200 opposite to the opening, and the mounting hole 210 extends from the bottom of the box body 200 in a direction away from the opening; the cover body 220 covers the opening, and the side wall of the cover body 220 is sleeved on the side wall of the box body 200, and the cover body 220 is detachably connected to the box body 200.

[0037] During the construction of the grounding box 20, the pre-embedded grounding flat steel is bent and welded to the transverse steel bar in the wall panel (the wall panel is not cast at this time), and then the pre-embedded grounding flat steel passes through the mounting hole 210. At this time, one end of the pre-embedded grounding flat steel is cast in the wall panel, and the other end is located in the closed space formed by the cover body 220 and the box body 200, so it will not be eroded and corroded by the external environment. In addition, the mounting hole 210 protrudes from the box body 200, which can prevent mud from pouring into the grounding box 20 during concrete pouring, thereby ensuring the waterproof effect of the grounding box 20.

[0038] The box body 200 has a certain depth and can form a closed space with the cover body 220. In this embodiment, the box body 200 is a rectangular parallelepiped. In other embodiments, the box body 200 can also be a cylinder or other shapes.

[0039] The mounting hole 210 is used for inserting the embedded grounding connection steel plate. In actual application, the embedded grounding connection plate is inserted into the mounting hole 210, one end of which is connected to the transverse steel bar in the wall panel, and the other end is located in the box body 200 for subsequent use with an external grounding body. It should be noted that the bottom of the box body 200 opposite to the opening is the back plate of the grounding dark box 20, and the mounting hole 210 protrudes from the back plate to prevent the mud from flowing back into the grounding dark box 20 during concrete pouring. Among them, the length of the mounting hole 210 extending from the bottom can be selected according to actual conditions. After the concrete is poured, the mounting hole 210 is embedded in the concrete protective layer.

[0040] like Figure 3 and Figure 4 As shown, in the present embodiment, the shape of the mounting hole 210 is strip-shaped, the number of the mounting holes 210 is two, and the two mounting holes 210 are arranged in parallel. The shape of the mounting hole 210 matches the shape of the embedded grounding connection steel plate. When the embedded grounding connection steel plate is a flat steel, the welding strength between the embedded grounding connection steel plate and the transverse steel bar can be improved. In other embodiments, when the embedded grounding connection steel plate is a round steel, the shape of the mounting hole 210 can also be set to a circle. In the present embodiment, there are two embedded grounding connection steel plates. In actual application, the two connection steel plates pass through the two mounting holes 210 and are fixed respectively. Both embedded connection steel plates are connected to the transverse steel bar, which can improve the stability of welding.

[0041] Please refer to Figure 3, the cover body 220 covers the opening, the side wall of the cover body 220 is sleeved on the side wall of the box body 200, and the cover body 220 and the box body 200 are detachably connected. The side wall of the cover body 220 matches the side wall of the box body 200, so that when the cover body 220 covers the opening, the cover body 220 and the box body 200 form a closed space. After the main civil construction of the integrated pipe gallery is completed, one end of the embedded grounding connection steel plate is cast in the wall panel, and the other end is located in the closed space formed by the cover body 220 and the box body 200. Therefore, even if the embedded grounding connection steel plate does not need to be externally connected to the grounding body later, the grounding dark box 20 can still maintain a good waterproof state, providing a complete waterproof and anti-corrosion protection for the embedded grounding connection steel plate before the grounding connection.

[0042] The side wall of the cover 220 is sleeved on the side wall of the box body 200, so the side wall of the cover 220 and the side wall of the box body 200 form a fitting surface. Figure 3 and Figure 5 In this embodiment, a sleeve 230 is further included. The sleeve 230 is sleeved on the joint between the side wall of the cover 220 and the side wall of the box body 200, that is, the sleeve 230 is sleeved on the joint surface between the cover 220 and the box body 200. During the concrete pouring process, the sleeve 230 can prevent mortar or other building materials from entering the joint surface, thereby playing a role in protecting the joint surface. Figure 3 As shown, in this embodiment, the outer surface of the sleeve 230 is higher than the outer surface of the side wall of the box body 200. In this way, after removing the sleeve 230, a certain gap will be left between the box body 200 and the wall plate, leaving enough space for subsequent replacement and installation of the cover body 220.

[0043] The cover 220 is detachably connected to the box body 200, so that the box body 200 can be replaced. For example, as shown in Figure 3, when the grounding box 20 leaves the factory, an integrated cover plate 222 can be selected, so that the grounding box 20 maintains good waterproof and corrosion resistance when it leaves the factory. When the embedded grounding steel plate protected by the grounding box 20 needs to be used for external grounding, the cover 220 is replaced with a cover plate 222. Figure 6 The box cover 224 shown in the figure can provide better waterproof and anti-corrosion protection for the embedded grounding connection steel plate protected by the grounding box 20, regardless of whether it is finally used for external grounding. Figure 7As shown, in this embodiment, the outer surface of the side wall of the box body 200 is provided with a connecting groove 202, and the cover body 220 is connected to the box body 200 through the connecting groove 202. The shape of the connecting groove 202 matches the shape of the side wall of the box body 200. When the cover body 220 needs to be covered on the opening of the box body 200, the side wall of the cover body 220 is pushed in along the connecting groove 202 until the cover body 220 is connected to the box body 200. Among them, the width of the mounting groove at the edge of the side wall of the box body 200 can be selected according to actual needs, as long as the cover body 220 can be connected to the box body 200. In this embodiment, the cover body 220 and the box body 200 are connected by interference fit. In other implementations, the cover body 220 and the box body 200 can also be frictionally connected, that is, the outer surface of the side wall of the cover body 220 and the inner surface of the side wall of the box body 200 are both rough surfaces with a certain friction coefficient, and the two are connected together by friction.

[0044] Please refer to Figure 3 When the embedded grounding steel plate protecting the grounding box 20 is not needed for external grounding, the cover 220 adopts an integrated cover. When the embedded grounding steel plate needs to be used for external grounding, the cover 222 needs to be knocked off and replaced with the box cover 224. The structure of the grounding box 20 after removing the cover 222 is as follows: Figure 7 As shown, the box cover 224 to be installed is as shown in Figure 6 As shown, the grounding dark box 20 after the box cover 224 is installed is as shown in FIG. Figure 8 , 9 It should be noted that, in this embodiment, the integrated cover plate 222 and the box body 200 are weakly connected in a waterproof manner without a breakpoint, and can be separated from the box body 200 under a certain external force. In addition, the integrated cover plate 222 of the grounding dark box 20 will not fall off before and after the pre-embedded concrete is poured during civil construction, and the waterproofness of the grounding dark box 20 will not be damaged. Therefore, it can provide a long-lasting and comprehensive waterproof and anti-corrosion protection for the pre-embedded grounding connection plate, and will not affect the main structure of the structure.

[0045] See also Fig.10 In this embodiment, the box cover 224 is provided with a slot 226. When an external grounding body is needed, the external grounding body passes through the slot 226 into the box cover 224 and is welded to the embedded grounding connection steel plate. The shape of the slot 226 matches the shape of the external grounding body, and can be either square or circular. In this embodiment, the slot 226 is circular, and the external grounding body is round steel. Furthermore, in this embodiment, an elastic washer 228 is also provided, and the elastic washer 228 is located in the slot 226. The external grounding body passes through the slot 226 through the elastic washer 228 and enters the box body 200, and the external grounding body and the elastic washer 228 are connected by interference fit. In addition, the elastic washer 228 is made of waterproof and anti-corrosion material, and the elastic washer 228 and the slot 226 are tested with a higher waterproof level (recommended to be level 8) before leaving the factory.

[0046] See also Figure 3 and Figure 6 In this embodiment, a water retaining plate 240 is further provided, and the water retaining plate 240 is arranged around the cover body 220. The water retaining plate 240 is arranged at the edge of the cover body 220. Furthermore, the water retaining plate 240 is perpendicular to the side wall of the cover body 220. In actual application, the water retaining plate 240 fits the surface of the concrete wall plate, and prevents water or corrosive substances from penetrating from the gap between the box cover 224 and the concrete, thereby ensuring the waterproof and anti-corrosion properties of the grounding dark box 20.

[0047] The specific construction process of the above-mentioned grounding box 20 in engineering application is as follows:

[0048] like Fig.11 As shown, at the designed agreed height, the upper and lower pre-embedded grounding flat steels 30 are bent and welded to the transverse steel bars 402 in the wall panel 40 (note: the wall panel has not been poured at this time), and the vertical spacing between the upper and lower pre-embedded grounding flat steels 30 matches the mounting holes 210 of the grounding dark box. The pre-embedded grounding flat steels 30 are passed through the mounting holes on the grounding dark box and fixed, and then concrete is poured;

[0049] like Fig.12 As shown, when the embedded grounding flat steel 30 in the grounding box needs to be used for external grounding, the integrated knock-off cover plate 222 of the grounding box is knocked off, the sleeve 230 is removed, and the connecting flat steel 50 is welded to the embedded grounding flat steel 30; one end of the grounding round steel 60 is bent 90 degrees and welded to the connecting flat steel 50, and the other end of the grounding round steel 60 passes through the mounting hole 210 through the elastic washer 228 and extends out of the box body 200;

[0050] like Fig.13 As shown, the box cover 224 is pushed toward the box body 200. The box cover 224 and the box body 200 are connected by interference fit. The water baffle on the box cover 224 can prevent moisture or corrosive substances from penetrating from the gap between the box cover 224 and the concrete. Fig.14 shown.

[0051] Apply asphalt or other anti-corrosion coatings to all connection gaps to enhance the overall waterproof and anti-corrosion effect of the grounding box.

[0052] When the above-mentioned grounding box leaves the factory, an integrated cover plate can be selected, so that the grounding box maintains good waterproof and corrosion resistance when leaving the factory. When the embedded grounding steel plate protected by the grounding box needs to be used for external grounding, the cover is replaced with a box cover suitable for inserting the external grounding body, so that the embedded grounding connection steel plate protected by the grounding box can provide good waterproof and corrosion protection whether it is finally used for external grounding.

[0053] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A grounding box, characterized in that: include: A box body, one side of which is open; A mounting hole is provided at the bottom of the box body opposite to the opening, and the mounting hole extends from the bottom of the box body in a direction away from the opening; A cover body, covering the opening, the side wall of the cover body is sleeved on the side wall of the box body, and the cover body is detachably connected to the box body; A sleeve, wherein the sleeve is sleeved at the joint between the side wall of the cover and the side wall of the box body, and the outer surface of the sleeve is higher than the outer surface of the side wall of the box body; The outer surface of the side wall of the box body is provided with a connecting groove, and the cover body is connected to the box body through the connecting groove.

2. The grounding box according to claim 1, characterized in that: The mounting holes are strip-shaped, the number of the mounting holes is two, and the two mounting holes are arranged in parallel.

3. The grounding box according to claim 1, characterized in that: The cover body and the box body are connected by interference fit.

4. The grounding box according to claim 1, characterized in that: It also includes a slot and an elastic gasket, wherein the slot is opened in the cover body and the elastic gasket is located in the slot.

5. The grounding box according to claim 1, characterized in that: A water baffle is also provided, and the water baffle is arranged around the cover body.

6. The grounding box according to claim 5, characterized in that: The water baffle is perpendicular to the side wall of the cover body.

7. An application construction method of the grounding box according to claim 1, characterized in that: include: Before the concrete pouring is completed after the reinforcement construction of the integrated pipe gallery is completed, the pre-buried grounding flat steel is bent and connected to the transverse steel bars in the wall panel, and then the pre-buried grounding flat steel is passed through the installation hole and fixed, and the concrete pouring is carried out; When the embedded grounding flat steel is used for an external grounding body, the original cover of the grounding box is removed, the external grounding body is welded to the embedded grounding flat steel, and then the external grounding body extends out of the replaced cover, and the installation is completed.

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