CN219591848U - Equipotential connection structure based on old building setting - Google Patents

Abstract

The utility model relates to the technical field of equipotential connection, in particular to an equipotential connection structure based on old buildings, which comprises a building body, an ammeter box arranged in the building body, a grounding body arranged outside the building body, and a cable led out from the ammeter box and arranged in the building body.

Description

Equipotential connection structure based on old building setting

Technical Field

The utility model relates to the technical field of equipotential connection, in particular to an equipotential connection structure based on old building setting.

Background

With the rise of old district transformation projects, more old district in-building transformation carries out in-building flying line arrangement groove returning work.

The metal bridge is used in the building according to fireproof requirements, and the old cable has long service life and is easy to have the phenomenon of electric leakage. And the original old ammeter box in the building is mostly free of grounding measures, and a certain leakage risk exists. The construction amount of re-laying cables is large and the foundation of the building body is easy to damage, so that equipotential equipment in the building is required to be installed to ensure the daily life safety of residents in order to prevent dangerous situations caused by electric leakage.

Therefore, a need exists for an equipotential connection structure for old buildings, which can solve the problem that no equipotential connection is easy to cause electric leakage, such as a bridge frame of a stairwell in an old community, an electric meter box and the like.

Disclosure of Invention

Aiming at the problems existing in the prior art, the utility model aims at: the equipotential connection structure of the old building is high in safety coefficient, reusable, simple in structure and convenient to install, and can solve the problem that no equipotential connection of a bridge frame, an ammeter box and the like of old communities is easy to cause electric leakage.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides an equipotential connection structure based on old building setting, includes the building body, sets up the ammeter case in the building body, sets up the external ground connection body of building to and draw forth from the ammeter case and the cable of arranging in the building body, the cable outside is provided with the crane span structure, the crane span structure sets up in the stair of the building body three-dimensionally, the crane span structure includes the case end crane span structure of being connected with the ammeter case, and a plurality of terminal crane span structures of being connected with the resident in the building body, be provided with the intercommunication crane span structure between case end crane span structure and the terminal crane span structure, be provided with the case bridge connector between case end crane span structure and the ammeter case, the crane span structure is provided with the equipotential connector with the ammeter case outside, the terminal and the ground connection body of equipotential connector are connected.

According to the equipotential connection structure based on the old building, the terminal bridge is perpendicular to the longitudinal wall surface of the building body, the connecting bridge is perpendicular to the wall surface of the building body, and the communicating vessel is arranged between the terminal bridge and the connecting bridge.

The equipotential bonding structure based on old building setting, the case bridge connector is including setting up the mounting hole on the lateral wall of ammeter case, cup joints the fixer at the mounting hole, the fixer include with the parallel external fixation body that cup joints of case end crane span structure, the case fixed body of being connected with the ammeter case, the case fixed body including setting up at ammeter incasement side and with external fixation body vertically fixed plate, set up at ammeter case outside and cup joint the solid fixed ring on the external fixation body, be provided with fixing bolt between solid fixed ring and the fixed plate.

The equipotential connection structure based on the old building comprises the equipotential connection terminal plates, and the equipotential connection terminal plates are used for connecting the bridge frame, the ammeter box and the equipotential connection lines, wherein the sectional area of the equipotential connection terminal plates is not smaller than that of the equipotential connection lines.

The equipotential connection structure based on the old building comprises the local equipotential connection line for connecting the equipotential terminal plate and the ground, and the auxiliary equipotential connection line is used for connecting a bridge frame and an ammeter box.

According to the equipotential connection structure based on the old building, the grounding body is made of flat steel, the flat steel is arranged on the outer side of the building body and extends to the ground, connecting steel is arranged between the equipotential connection body and the flat steel, the joint of the connecting steel and the flat steel is fixed in a lap joint welding mode, and the equipotential connection body and the connecting steel are fixed in a pressure joint mode.

According to the equipotential connection structure based on the old building, the number of the terminals on the equipotential terminal plates is not less than two, each time the number of the terminals is increased, the length of the equipotential terminal plates is increased by 30mm, the outer sides of the equipotential terminal plates are provided with the protective covers, and the width of the protective covers is not less than 10mm longer than that of the equipotential terminal plates.

The equipotential connection structure based on the old building has the beneficial effects that: by using the bridge equipotential connection structure in the stairway in the building body, the disorder of strong and weak wires in the stairway is solved, and meanwhile, indirect contact electric shock and electromagnetic interference prevention of the bridge in the stairway and an electric meter box are avoided; the cable can be ensured to be gathered together by using the bridge structure, the cable is ensured to be in a closed state, the potential safety hazard caused by cable scattering is prevented, the connection stability of the bridge and the ammeter box can be enhanced by using the box bridge connector, the equipotential connection of the ammeter box is facilitated, the structural stability of the equipotential protection device can be ensured, the occupation of space in the reconstruction process of an old building is reduced, the elegant appearance of a stairwell is ensured, and the bridge structures at different positions and the equipotential connection of the ammeter box can be realized by using the equipotential connection wire.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the equipotential connector according to the present utility model;

FIG. 3 is a schematic view of the equipotential bonding set-up in the corridor of the present utility model;

FIG. 4 is a schematic view of the equipotential terminal plate structure of the present utility model;

FIG. 5 is a schematic diagram of a box bridge connector according to the present utility model;

fig. 6 is a schematic view of the bridge structure of the present utility model.

Reference numerals illustrate: the electric meter box 10, the grounding body 20, the connecting steel 201, the ground 202, the PVC sleeve 203, the bridge 30, the box end bridge 301, the terminal bridge 302, the communicating bridge 303, the communicating vessel 304, the box bridge connector 40, the mounting hole 401, the external fixing body 402, the fixing plate 403, the fixing ring 404, the fixing bolt 405, the equipotential connector 50, the equipotential bonding terminal plate 501, the equipotential bonding wire 502, the terminal 503, the protective cover 504 and the auxiliary equipotential bonding wire 505.

Detailed Description

In order to enable those skilled in the art to better understand the technical scheme of the present utility model, the technical scheme of the present utility model will be described below with reference to the detailed description and the accompanying drawings.

Example 1

As shown in fig. 1 to 6, an equipotential connection structure based on an old building includes a building body, an electricity meter box 10 provided in the building body, a grounding body 20 provided outside the building body, and a cable led out from the electricity meter box and arranged in the building body.

The cable outside is provided with the crane span structure 30, the crane span structure sets up in the stair of the building body in a solid, the crane span structure includes the case end crane span structure 301 that is connected with the ammeter case, a plurality of terminal crane span structures 302 that are connected with the resident in the building body, be provided with between case end crane span structure and the terminal crane span structure and communicate crane span structure 303, the terminal crane span structure is for entering the family's crane span structure, it is arranged in the horizontal direction, it is perpendicular to the vertical wall of the building body, case end crane span structure is connected with the ammeter case perpendicularly, it is middle excessive crane span structure to connect the crane span structure, it is perpendicular to the wall of the building body to be provided with the communicating vessel 304 between terminal crane span structure and the connecting crane span structure, according to different setting positions, the communicating vessel can use tee connecting vessel or four-way connecting vessel, or different forms such as right angle connecting vessel. When two or more households exist in the same unit on the same floor, the terminal bridge frames of the households which are connected in sequence.

Be provided with case bridge connector 40 between case end crane span structure and the ammeter case, case bridge connector is including setting up mounting hole 401 on the lateral wall of ammeter case, cup joints the fixer on the mounting hole, the fixer include with the parallel outer fixed body 402 that cup joints of case end crane span structure, the case fixed body of being connected with the ammeter case, the case fixed body is including setting up at ammeter incasement side and with outer fixed body vertically fixed plate 403, set up in ammeter case outside and cup joint the solid fixed ring 404 on the outer fixed body, be provided with fixing bolt 405 between solid fixed ring and the fixed plate. The fixed plate and the fixed ring are coaxially arranged, the inner diameter of the fixed plate and the fixed ring is larger than the diameter of the mounting hole, and the structure of the electric meter box on two sides of the mounting hole is clamped by the inner plate and the outer plate, so that the stability of connection of the box bridge connector and the electric meter box can be ensured. The external fixing body can be sleeved on the outer side of the box end bridge according to the installation position of the box end bridge, and also can be sleeved on the inner side of the box end bridge, through holes are formed in the corresponding positions of the external fixing body and the box end bridge, and the external fixing body and the box end bridge are fixed through bolts.

The bridge and the outer side of the ammeter box are provided with an equipotential connector 50, the terminal of the equipotential connector is connected with the grounding body, the equipotential connector comprises an equipotential connection terminal plate 501, an equipotential connection line 502 used for connecting the bridge, the ammeter box and the equipotential connection terminal plates with each other, the section of the equipotential connection terminal plate is not smaller than that of the equipotential connection line, and the equipotential connection line comprises a local equipotential connection line used for connecting the equipotential connection terminal box with the ground and an auxiliary equipotential connection line 505 used for connecting the bridge and the ammeter box.

The number of the terminals 503 on the equipotential terminal plate is not less than two, the number of the terminals on the equipotential terminal plate is increased by one, the length of the equipotential terminal plate is increased by 30mm, the outer side of the equipotential terminal plate is provided with a protective cover 504, and the width of the protective cover is not less than 10mm longer than the width of the equipotential terminal plate.

The grounding body is made of flat steel, the flat steel is arranged on the outer side of the building body and extends to the ground, a connecting steel 201 is arranged between the equipotential connecting body and the flat steel, and the connecting part of the connecting steel and the flat steel is fixed in a lap welding mode.

Example 2

The same parts of this embodiment as those of embodiment 1 will not be described in detail.

When the equipotential bonding structure based on the old building is implemented in the technical scheme, the integral structure of the building body is required to be measured, a bridge is installed, a cable is gathered into the bridge structure, the joint of the bridge and the bridge is connected by using an equipotential bonding wire, the front end of the terminal bridge is provided with a wall connecting plate, the wall connecting plate is fixed on a vertical wall of the building body by using an expansion bolt, the position and trend of fixing points of electrical appliances such as an equipotential bonding terminal board (LEB terminal board for short), the equipotential bonding wire and the like are determined according to the field condition, horizontal or vertical lines are found from the LEB terminal board to the exposed conductive part or the conductive part outside the device, the trunk line is followed by branch lines, and the line center spring line is marked by a powder line bag.

In the utility model, the grounding body adopts 25 x 4 galvanized flat iron or flat steel, and the LEB terminal board box is horizontally laid out of the building body unit along the wall, and then 25 x 4 galvanized flat iron or flat steel is used for outdoor embedding below the ground 202, so that the field embedding depth is required to be no less than 0.8 meter. And (3) welding the horizontal section flat steel of the LEB terminal board box with the buried vertical flat steel, wherein the lap joint length is not less than 2 times of the width, welding three sides, removing welding slag after welding, and brushing antirust paint. DN50 and PVC insulating sleeves are used for protecting the flat iron, and insulating marks are sprayed on the PVC sleeve 203 to prevent residents from touching by mistake.

In the specific implementation, the old community ammeter box is located at one floor, so the LEB terminal board box is installed at one side of the ammeter box in a multi-bottom and safe manner, the equipotential connection of the ammeter box and the connection of the LEB terminal board box and the grounding body are facilitated, the elegant appearance of the stairway can be ensured, and the public space for the residents to go out is not occupied. LEB terminal board is used for the surface mounting on the equipment room wall, and the installation height should accord with the design requirement. When the mounting is carried out, firstly, the positions of the mounting holes are marked at the corresponding positions of the walls according to the result of spring wire positioning on the wall surface of the building body and the positions of the mounting holes of the LEB terminal plates, then, the terminal weights of the LEB terminal plates are fixed on the walls by adopting M10mmx80mm expansion bolts, and the screw rods of the expansion bolts are ensured to be reserved for a sufficient length so as to be used for fixing the protective covers during the fixing. Finally, the protective cover of the terminal plate is fixed on the screw rod of the expansion bolt by using an M10mm nut and a 10mm washer. The LEB terminal board box is welded and connected with the grounding body by adopting 25 x 4 galvanized flat iron, the galvanized flat steel is welded with the galvanized flat steel, the lap joint length is not less than 2 times of the width, three sides are welded, welding slag is removed after the welding, and antirust paint is painted.

The LEB terminal plate material is preferably a red copper plate with the thickness of not less than 4 mm. When the LEB terminal board is manufactured, the length of the LEB terminal board is firstly determined according to the number of outgoing lines of the equipotential bonding wires, and the length of the LEB terminal board in single-row arrangement is=30mmx (branch number +1) +2x15mmx2, wherein 30mm represents the distance between each branch crimping hole and the distance between the branch crimping hole close to the mounting hole and the mounting hole, and 15mm represents the longitudinal hole diameter of the mounting hole of the LEB terminal board and the distance between the mounting hole and the LEB terminal board end. Specifically, the method can be performed with reference to table 1, and the crimp holes can be arranged in a plurality of rows when the number of branches is large.

Number of terminals	L (mm) plate length
		2	80
3	110
		4	140
5	170
		Every time one is added	An increase of 30

TABLE 1

The LEB terminal board is perforated by a bench drill, the perforated aperture is 6.5mm, the transverse perforated aperture of the mounting hole is 6.5mm, and the wiring nose of the fixed branch is a bolt M6x30, a nut M6 and a washer 6 mm.

According to LEB terminal plate's specification preparation safety cover, the safety cover adopts 2mm thick steel sheet, and the width of safety cover should be more than LEB terminal plate's width and be no less than 10mm, generally adopts 10mm, and the transverse trompil aperture of mounting hole is 6.5mm, and the safety cover constitutes equipotential case with LEB terminal plate.

For the equipotential bonding wire and the junction of the hidden part, the electric constructor should make hidden detection records and detection reports, and the actual trend and the position of the equipotential bonding wire should be noted on the completion chart.

The equipotential conductors can be connected in a welding mode, and slag inclusion, undercut, air holes and incomplete welding are avoided at welding positions; the bolt connection can be adopted, and the smoothness and the firm crimping of the contact surface are ensured. Corrosion-resistant measures such as hot galvanizing or enlarging the section of the lead should be taken in corrosive places. The LEB terminal block should be bolted for periodic inspection for disassembly. When the equipotential bonding wires are connected by conductors of different materials, the equipotential bonding wires can be connected by a welding method, or can be connected by a pressing method, and the welding position is subjected to tin coating treatment during pressing.

The equipotential box is connected with the metal body of the grounding body by adopting a lap welding method, 25 x 4 flat irons are obviously laid on the LEB terminal board arranged beside one layer of ammeter box to be led to the outdoor buried depth of 0.8 meter, the flat steels need to be straightened before laying, the bending is not excessively dead, the straight line section should not be obviously bent, and the flat steels should be vertically laid. The welding length of the galvanized round steel is not less than 6 times of the diameter of the galvanized round steel and the galvanized round steel is welded on two sides, and when the diameters are different, the lap joint length is based on the large diameter; the lap joint of the flat steel and the flat steel is 2 times of the width of the flat steel, welding is carried out on at least three sides, the welding part is full, the welding seam is polished smoothly, welding slag is removed after the welding is finished, and an anti-rust coating is coated.

When the equipotential bonding wire is connected with the LEB terminal plate, a wiring nose or galvanized flat steel or copper strip is adopted to firmly press and connect with the LEB terminal plate through a bolt of M6x30 and a matched nut and spring washer.

When the equipotential connecting wire is connected with the bridge and the ammeter box, a PE yellow-green flexible wire with the length of not less than 4 square millimeters is adopted for connection when the equipotential connecting wire is connected.

Conducting test is carried out after equipotential connection is installed, and when the resistance between the LEB terminal board and the tail end of a metal body such as a metal pipeline in the equipotential connection range is not more than 1 omega, the equipotential connection is considered to be effective; if the conduction failure is found, the jumper should be used, and the test should be performed periodically after the jumper is put into use.

The section of the equipotential bonding wire meets the requirements set forth in table 2:

TABLE 2

The high-grade decorative metal parts or components needing equipotential connection are provided with special wiring bolts connected with equipotential connection branch lines and provided with marks, and the nuts at the connection positions are fastened and the anti-loose parts are complete.

The connection between the equipotential connection accessible bare conductor or other metal parts, components and branch wires should be reliable, and the fusion welding, fiber welding or mechanical fastening should be conducted normally.

The equipotential bonding wire should be provided with yellow-green alternate color marks, yellow primer should be painted on the LEB terminal board and black marks should be marked, the marks are

The cross-section of the LEB terminal block must not be smaller than the cross-section of the connected equipotential bonding wire.

The mounted LEB terminal board and terminal box should be protected during construction to prevent pollution or damage during civil construction.

The specification of the anchor ear at the bridge frame is matched with the pipe, and the surface of the contact position is wiped clean, and the cable is tightly pressed according to the requirement. So as to prevent the anchor ear from loosening and the press connection from being unstable. The wire should be pulled before the fixed bolster that the crane span structure was gone out to use the level bar to recheck, make it horizontal, then the bullet line is fixed the support again, and fixed in the middle of both ends earlier, prevent that fixed bolster fixed height is inhomogeneous, when steadily adorning LEB terminal board or LEB terminal board case, should use the wire weight alignment earlier, and fixed firm again prevents that LEB terminal board or LEB terminal board case from having the skew.

The bridge frame is connected by adopting yellow-green flexible wires with the length not less than 4 square millimeters at the disconnection position of the bridge frame in the building, and the position of a layer of bridge frame close to the LEB end is laid and connected into the LEB box along the corner horizontally and vertically by adopting the yellow-green flexible wires with the length not less than 4 square millimeters, and the connection is stable. The outer shell of the electric meter box is also connected into the LEB box nearby by adopting a yellow-green flexible wire not smaller than 4 square millimeters, and the connection is stable.

After the construction is completed, a ground resistance detection instrument is used for ground resistance detection on site, and the ground resistance is required to be smaller than 1 ohm. If the grounding resistance does not meet the requirement, the grounding body needs to be increased outdoors to meet the equipotential grounding requirement.

The above embodiments are only for illustrating the structural concept and features of the present utility model, and are intended to enable those skilled in the art to understand the contents of the present utility model and implement the same, not to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the essence of the present utility model should be included in the scope of the present utility model.

Claims (7)

1. The utility model provides an equipotential connection structure based on old building setting, includes the building body, sets up the ammeter case in the building body, sets up the external grounding body of building to and draw forth and arrange in the building body from ammeter case, its characterized in that: the cable outside is provided with the crane span structure, the crane span structure sets up in the stair of building body three-dimensionally, the crane span structure includes the case end crane span structure of being connected with the ammeter case to and a plurality of terminal crane span structures of being connected with the resident in the building body, be provided with the intercommunication crane span structure between case end crane span structure and the terminal crane span structure, be provided with case bridge connector between case end crane span structure and the ammeter case, the crane span structure is provided with the equipotential connector with the ammeter case outside, the terminal and the grounding body of equipotential connector are connected.

2. The equipotential bonding structure based on the old building set according to claim 1, characterized in that: the terminal bridge is perpendicular to the longitudinal wall surface of the building body, the communicating bridge is perpendicular to the wall surface of the building body, and a communicating vessel is arranged between the terminal bridge and the connecting bridge.

3. The equipotential bonding structure based on the old building set according to claim 2, characterized in that: the box bridge connector comprises a mounting hole arranged on the side wall of the electric meter box and a fixer sleeved on the mounting hole, the fixer comprises an outer fixing body sleeved in parallel with a box end bridge, a box fixing body connected with the electric meter box, the box fixing body comprises a fixing plate arranged on the inner side of the electric meter box and perpendicular to the outer fixing body, a fixing ring arranged on the outer side of the electric meter box and sleeved on the outer fixing body, and fixing bolts are arranged between the fixing ring and the fixing plate.

4. The equipotential bonding structure based on the old building set according to claim 3, wherein: the equipotential connection body comprises equipotential connection terminal plates, and equipotential connection lines are used for connecting the bridge frame, the ammeter box and the equipotential connection terminal plates, and the sectional area of the equipotential connection terminal plates is not smaller than that of the equipotential connection lines.

5. The equipotential bonding structure based on the old building set according to claim 4, wherein: the equipotential bonding wire comprises a local equipotential bonding wire used for connecting the equipotential bonding terminal plate and the ground, and an auxiliary equipotential bonding wire used for connecting a bridge frame and an ammeter box.

6. The equipotential bonding structure based on the old building set according to claim 5, wherein: the ground connection body uses the band steel, the band steel sets up in the external side of building and extends to underground, be provided with the connecting steel between equipotential connector and the band steel, the connecting steel uses lap welding's mode to fix with the band steel junction, use the mode of connecing the crimping to fix between equipotential connector and the connecting steel.

7. The equipotential bonding structure based on the old building set according to claim 4, wherein: the number of the terminals on the equipotential bonding terminal plate is not less than two, the number of the terminals is increased by one, the length of the equipotential bonding terminal plate is increased by 30mm, a protective cover is arranged on the outer side of the equipotential bonding terminal plate, and the width of the protective cover is not less than 10mm longer than that of the equipotential bonding terminal plate.