Conductive force-bearing separated circular grounding body connecting piece and construction method thereof

Abstract

This invention discloses a conductive and load-bearing separate circular grounding electrode connector and its construction method. The connector includes a load-bearing body with multiple conical holes and external threads. Each conical hole is fitted with a multi-lobed conical cylinder, and each external thread is threaded with a locking nut. The locking nut and the multi-lobed conical cylinder can be sequentially fitted onto the connecting ends of the circular steel grounding electrode, allowing the load-bearing body to mechanically lock the multiple connecting ends of the circular steel grounding electrodes together. A conductive cavity is formed inside the load-bearing body, communicating with the multiple conical holes. A conductive bridge is provided within the conductive cavity, which can engage with the multiple mechanically locked connecting ends of the circular steel grounding electrodes to form a conductive path directly connecting the multiple circular steel grounding electrodes to the conductive bridge. This solves the problem in existing zero-open-flame galvanized circular steel grounding electrode connectors that cannot guarantee synchronous and stable mechanical fixation and conductivity without interference.

Description

Technical Field

[0001] This invention relates to the field of power engineering technology, specifically to a conductive and load-bearing separate circular grounding electrode connector and its construction method. Background Technology

[0002] Galvanized round steel grounding electrodes are a core material in grounding systems for power engineering. Traditionally, galvanized round steel grounding electrodes are installed using welding connections. This method simultaneously achieves mechanical fixing and continuous metallic conductive connection between the galvanized round steel grounding electrodes, and the stability and conductive continuity of the connection structure meet the requirements in conventional construction scenarios. However, in forest areas, pastoral areas, and various high-fire-risk special construction scenarios, the open flames, high-temperature molten slag, and metal spatter generated by welding operations can easily cause fire hazards, posing significant construction safety risks and making it unsuitable for grounding construction requirements in high-fire-risk areas.

[0003] To address the safety hazards of open flame in traditional welding connection methods, a quick connection device for grounded round steel has emerged in the prior art, as detailed in Reference 1.

[0004] Reference 1: Chinese patent document with patent publication number CN202275965U.

[0005] Reference 1 discloses a quick connection device for grounding round steel. The device mainly includes a conductive connector. The hollow branch end of the conductive connector is provided with an external thread, a fastening nut, and dovetail-shaped clips distributed circumferentially. By tightening the fastening nut, the dovetail-shaped clips can be radially contracted to achieve tight clamping and fixing of two butt-jointed galvanized round steels. Moreover, the device can be configured into two-way to six-way connection joints according to construction needs, adapting to the grounding round steel connection requirements of different working conditions, completely eliminating the traditional welding process and eliminating construction safety hazards in high fire risk scenarios.

[0006] However, in the device disclosed in Reference 1, the mechanical locking interface and the electrical conductivity interface are the same coupling interface. That is, the electrical conductivity between the galvanized round steel grounding bodies in the device disclosed in Reference 1 relies entirely on the mechanical clamping contact surface between the clamp and the outer wall of the round steel. The contact surface is not only the mechanical locking force interface that ensures the tensile strength and anti-loosening ability of the connection, but also the core electrical contact interface that ensures the grounding conductivity and controls the contact resistance. This structural characteristic means that key parameters such as the clamping tooth shape, tooth bite depth, main material of the connector, and locking torque must simultaneously take into account the triple performance requirements of mechanical tensile strength, electrical conductivity, and corrosion protection. The parameter design is extremely difficult, and it is impossible to optimize a single performance index. At the same time, this coupling interface is highly susceptible to performance degradation due to external factors and structural conditions. Any minor problem, such as loose threads, dust and oil contamination on the contact surface, or stress creep of the galvanized layer, will simultaneously cause a decrease in mechanical locking force and an increase in electrical contact resistance, leading to a simultaneous deterioration in the mechanical fixation reliability and electrical conductivity stability of the device. Summary of the Invention

[0007] The purpose of this invention is to solve the problem that existing zero-open-flame galvanized round steel grounding electrode connectors cannot guarantee that mechanical fixing and conductivity performance remain synchronous and stable without interference. The invention provides a conductive and load-bearing separate round grounding electrode connector and its construction method.

[0008] To address the shortcomings of the aforementioned technical problems, the present invention adopts the following technical solution: a conductive load-bearing separate circular grounding body connector, comprising a load-bearing body, the load-bearing body having multiple conical holes and external threads, each conical hole being fitted with a multi-lobed conical cylinder, each external thread being threaded with a locking nut, and the locking nut and the multi-lobed conical cylinder being sequentially fitted onto the connecting end of the circular steel grounding body, so that the load-bearing body mechanically locks the connecting ends of the multiple circular steel grounding bodies together; The load-bearing body has a conductive cavity inside, which is connected to multiple conical holes; The conductive cavity is equipped with a conductive bridge, which can be connected to the connection ends of multiple round steel grounding bodies that are mechanically locked to the load-bearing body, so as to form a conductive path that directly connects multiple round steel grounding bodies to the conductive bridge.

[0009] As a further optimization of the conductive bearing separate circular grounding body connector of the present invention: the conductive bridge is connected to a conductive seat at the conical hole, and the conductive seat is connected to an elastic conductive sheet at the point away from the conductive bridge.

[0010] As a further optimization of the conductive load-bearing separate circular grounding body connector of the present invention: a pre-tightening gasket is provided between the elastic conductive sheet and the conductive seat or between the conductive seat and the inner wall of the conductive cavity.

[0011] As a further optimization of the conductive load-bearing separate circular grounding body connector of the present invention: the pre-tightening gasket can be a disc spring, wave spring, elastic washer or elastic expansion sleeve.

[0012] As a further optimization of the conductive load-bearing separate circular grounding body connector of the present invention: the load-bearing body is provided with multiple detection holes, the conductive seat and the conductive bridge are connected to the detection holes, and the detection holes are sealed by studs.

[0013] As a further optimization of the conductive load-bearing separate circular grounding body connector of the present invention: the elastic conductive sheet is a circumferentially open crown spring ring, a C-shaped elastic ring, a multi-finger spring ring, a stacked ring contact finger, or several independent elastic contact fingers.

[0014] As a further optimization of the conductive load-bearing separate circular grounding body connector of the present invention: the load-bearing body is configured as a columnar sleeve or a T-shaped cylinder.

[0015] As a further optimization of the conductive load-bearing separate circular grounding body connector of the present invention: the inner wall of the locking nut is provided with a sealing ring, which is a double-lip sealing ring.

[0016] As a further optimization of the conductive bearing separate circular grounding body connector of the present invention: the inner wall of the multi-lobed conical cylinder is provided with anti-slip teeth, and the end of the conical hole facing the conductive cavity is the small diameter end. The inner diameter of the conductive cavity and the conical hole is smaller than the small diameter end of the conical hole, so as to form a limiting shoulder at the conical hole and the conductive cavity.

[0017] As a further optimization of the construction method of the conductive load-bearing separate circular grounding electrode connector of the present invention, it includes the following steps: S1. Specification verification: Verify the diameter of the round steel grounding body, the specifications of the load-bearing body, the inner diameter range of the elastic conductive sheet, and the rated current rating of the conductive bridge. S2. Zone cleaning: Mark the connection position with the multi-lobed cone and the contact area of ​​the elastic conductive sheet on the round steel grounding body. At the same time, clean the mud, oil and rust on the round steel grounding body. Do not grind off the complete galvanized layer on the round steel grounding body in a large area. S3. Conductive area pretreatment: Apply the specified conductive anti-corrosion grease only to the contact end between the round steel grounding body and the elastic conductive sheet to prevent anti-corrosion paint, sealant and thread lubricant from entering the contact area between the round steel grounding body and the elastic conductive sheet; S4. Insertion and positioning: Pass the round steel grounding body through the lock nut, sealing ring and multi-lobed cone, then continue to insert the elastic conductive contact finger at the end of the round steel grounding body, then send the round steel grounding body into the load-bearing body and push the multi-lobed cone into the conical hole, so that the elastic conductive sheet can stably contact the conductive seat to generate continuous rebound pressure. S5. Mechanical pre-tightening: Using the external thread provided on the outer side of the end of the load-bearing body, tighten the lock nut so that the multi-lobed cone is squeezed by the conical hole and circumferentially fitted and locked to the round steel grounding body. At the same time, check the coaxiality, insertion depth and contact position of the connection between the round steel grounding body and the load-bearing body. S6, Final Tightening Limit: Continue to tighten the lock nut according to the specified torque or stroke until the wedge reaches the stroke limit shoulder, thereby establishing a stable load-bearing mechanical locking path, while limiting the maximum bite depth of the anti-slip teeth; S7. Electrical Testing: Measure the resistance of the main current path using the four-wire method through the test hole or the two sections of round steel grounding body, and record the measured value; if necessary, test the segmental resistance from each conductive base to the conductive bridge separately. S8. Sealing and corrosion protection: The double-stage seal is achieved by locking the nut and sealing the ring at the end. Anti-seize medium is used at the locking nut and external thread. An external anti-corrosion layer is coated on the surface of the load-bearing body and the outer shell of the locking nut. No material is mixed into the conductive cavity. S9. Verification and Recording: Record the specifications, installation torque or stroke, connection resistance, construction personnel and date, and confirm that the round steel grounding body is free from slippage and completely sealed before backfilling.

[0018] Compared with the prior art, the present invention has the following beneficial effects: This invention achieves a zero-open-flame mechanical locking connection between the load-bearing body and the round steel grounding body by using a load-bearing body in conjunction with a multi-lobed conical cylinder and a locking nut. Simultaneously, a conductive cavity located at the center of the load-bearing body and a conductive bridge within the cavity are used to electrically connect the round steel grounding body to the load-bearing body while it is mechanically locking it. This separates the mechanical locking from the electrical conduction, avoiding mutual interference between the two. In other words, it no longer relies solely on the mechanical contact between the multi-lobed conical cylinder and the round steel grounding body to bear the entire conductive function. Instead, an independent elastic conductive path is set inside the locking structure of the load-bearing body, thus solving the problem in existing zero-open-flame galvanized round steel grounding body connectors that cannot guarantee synchronous and stable mechanical fixation and conductive performance without interference. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural diagram of the usage state of Embodiment 1 of the present invention; Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the diagram; Figure 3 This is a front view of the structure in use according to Embodiment 1 of the present invention; Figure 4 This is a cross-sectional structural diagram of the usage state of Embodiment 2 of the present invention; Figure 5 This is a front view of the structure in the usage state of Embodiment 2 of the present invention; The markings in the diagram are: 1. Round steel grounding body; 2. Load-bearing body; 3. Multi-lobed cone; 4. Locking nut; 5. Elastic conductive sheet; 6. Conductive seat; 7. Conductive bridge; 8. Pre-tightening washer; 9. Sealing ring; 10. Limiting shoulder; 11. Detection hole; 12. Conical hole; 13. Conductive cavity. Detailed Implementation

[0020] To better understand the present invention, the following embodiments further illustrate the content of the present invention, but the content of the present invention is not limited to the following embodiments.

[0021] <Example 1> like Figure 1 and Figure 3 As shown, a galvanized round steel grounding electrode connector includes a load-bearing body 2, which is a cylindrical sleeve type. Both ends of the load-bearing body 2 have tapered holes 12, and the opposite ends of the two tapered holes 12 are connected through a conductive cavity 13 located at the center of the load-bearing body 2. This allows the tapered holes 12 and the conductive cavity 13 to be arranged sequentially along the axial direction of the round steel grounding body 2. External threads are provided on the outer circumferential surfaces of both ends of the load-bearing body 2. Figure 2 As shown, the conductive cavity 13 is a through hole that penetrates the load-bearing body 2. A columnar conductive bridge 7 is provided inside the conductive cavity 13. Both ends of the conductive bridge 7 are provided with conductive seats 6, and an elastic conductive sheet 5 is connected to the conductive seat 6 away from the conductive bridge 7. When the load-bearing body 2 is connected to two round steel grounding bodies 1, the opposite ends of the two round steel grounding bodies 1 are connected and electrically connected to the conductive bridge 7 through the elastic conductive sheet 5 and the conductive seat 6. The load-bearing mechanical locking position is located on the outside and the conductive area is located on the inside, so as to separate the conductive area and the mechanical connection area, thereby avoiding the mutual influence between the mechanical connection and the power conduction.

[0022] like Figure 1 As shown, in use, a locking nut 4 and a multi-lobed cone 3 are sequentially fitted onto the end of the round steel grounding body 1. After the locking nut 4 is connected to the external thread at the end of the load-bearing body 2, the locking nut 4 is axially pushed into the multi-lobed cone 3 along the external thread. The multi-lobed cone 3 engages with the tapered hole 12, converting the axial thrust into a radial clamping force. Simultaneously, the inner wall of the multi-lobed cone 3 is provided with anti-slip teeth, which can withstand axial pull-out, vibration, and bending loads to maintain the stability of the connection between the round steel grounding body 1 and the load-bearing body 2. After repeating the above operations, the ends of the two sections of the round steel grounding body 1 can be connected together without open flame. Figure 2As shown, when the opposite ends of two round steel grounding bodies 1 are connected together by a load-bearing body 2, the opposite ends of the two round steel grounding bodies 1 will be electrically connected simultaneously through elastic conductive plates 5 and conductive seats 6, and in conjunction with conductive bridges 7. This allows the load-bearing wedge-tightening mechanical locking area to be located on the outside and the conductive area on the inside, thus separating the main conductive path and the mechanical connection path. Specifically, the main conductive path consists of one side of the round steel grounding body 1, the corresponding side's elastic conductive plate 5 and conductive seat 6, conductive bridge 7, the other side's elastic conductive plate 5 and conductive seat 6, and the other side's round steel grounding body 1. The auxiliary conductive path consists of one side of the round steel grounding body 1, the load-bearing body 2, and the other side's round steel grounding body 1.

[0023] The main conductive path does not pass through the locking nut 4, the external thread, or the load-bearing body 2. Therefore, the lubrication condition of the external thread, the corrosion of the locking nut 4 surface, and the insulation of the sealing material on the load-bearing body 2 are not necessary conditions for the rated conductivity. The multi-lobed cone 3 and the load-bearing body 2 can form auxiliary parallel conductive paths due to metal-to-metal contact, but these auxiliary conductive paths are not the sole basis for the design conductivity rating.

[0024] The conical hole 12 faces inward towards the load-bearing body 2, meaning that both ends of the conical hole 12 and the conductive cavity 13 are set with small diameters. The inner diameter of the conductive cavity 13 is smaller than the small diameter of the conical hole 12, so that a limiting shoulder 10 is formed at the connection between the conductive cavity 13 and the conical hole 12. The setting of the limiting shoulder 10 can limit the amount of insertion of the multi-lobed conical cylinder 3 into the conical hole 12, that is, the maximum pushing amount of the multi-lobed conical cylinder 3 is limited by the limiting shoulder 10. When the multi-lobed conical cylinder 3 reaches the predetermined position, even if a certain installation torque is continued to be applied, the radial biting depth of the anti-slip teeth into the surface of the round steel grounding body 1 will not increase indefinitely, thus preventing damage to the surface of the round steel grounding body 1. At the same time, it also reduces the probability of the resistance of the round steel grounding body 1 increasing due to damage to the surface galvanized layer and damage and deformation of the cross-section of the round steel grounding body 1.

[0025] Specifically, anti-slip teeth can be made with blunt tooth tips, discontinuous tooth strips, or directional shallow teeth to further reduce damage to the galvanized layer while meeting anti-slip requirements.

[0026] The elastic conductive sheet 5 can be a circumferentially open crown spring ring, a C-shaped elastic ring, a multi-finger spring ring, a stacked ring contact finger, or several independent elastic contact fingers. The free inner diameter of each contact finger is smaller than the nominal outer diameter of the compatible round steel. When the round steel is inserted, the contact fingers elastically expand outward and generate a continuous radial rebound force. The working end of the contact finger that contacts the round steel adopts an arc surface or a blunt protrusion to form multiple parallel contact points and avoid forming a single sharp deep bite area. The elastic contact finger can be made of beryllium copper, phosphor bronze, chromium zirconium copper, copper alloy stainless steel composite material, or other materials that combine elasticity and conductivity; the contact surface can be provided with tin plating, silver plating, nickel underlayer with tin layer, or other transition layers. The specific materials need to be determined in conjunction with the electrochemical compatibility and soil environment tests of the round steel grounding body 1.

[0027] like Figure 2 As shown, a conductive seat 6 is provided at the connection between the conductive cavity 13 and the small-diameter end of the tapered hole 12. The conductive seat 6 is connected to the end of the conductive bridge 7, and a pre-tightening gasket 8 is provided between the conductive seat 6 and the inner wall of the stepped platform of the conductive cavity 13. Alternatively, the pre-tightening gasket 8 may not be provided between the conductive seat 6 and the stepped platform. A gap is provided between the conductive seat 6 and the elastic conductive sheet 5. The elastic conductive sheet 5 is connected to the conductive seat 6, and another pre-tightening gasket 8 is provided in the gap. Alternatively, the gap may not be provided between the conductive seat 6 and the elastic conductive sheet 5, i.e., no other pre-tightening gasket 8 is provided between the elastic conductive sheet 5 and the conductive seat 6. Specifically, both pre-tightening gaskets 8 can be provided simultaneously, or only one can be provided and installed in any position. This allows the two or any one of the pre-tightening gaskets 8 to compensate for contact displacement after changes in external temperature, surface micro-movement, and slight creep of the coating, thereby maintaining the contact pressure of the main conductive path and ensuring the stable conductive function of the main conductive path.

[0028] Specifically, the pre-tightening gasket 8 can be a disc spring, wave spring, elastic washer, or elastic expansion sleeve. The conductive base 6 is used to fix the elastic conductive sheet 5 and collect the parallel current of the elastic conductive sheet 5 to the conductive bridge 7. The conductive base 6 can be a ring base, a split ring base, or a semi-ring spliced ​​base, and is connected to the conductive bridge 7 by press fitting, threaded crimping, riveting, diffusion connection, brazing, or conductive fasteners. Welding is not required for on-site installation.

[0029] The conductive bridge 7 can be an axial conductive rod, a thick-walled conductive inner sleeve, a conductive plate assembly, or an integrated conductive core. Its effective cross-sectional area is calculated and determined based on the maximum fault current, lightning impulse current, and thermal stability requirements. An insulating sleeve, a corrosion-resistant isolation layer, or a gap can be provided between the inner wall of the conductive cavity 13 and the conductive bridge 7 to reduce uncontrolled galvanic corrosion between different metals; alternatively, the conductive cavity 13 can be electrically connected to the load-bearing body 2 through a controllable contact point, so that the load-bearing body 2 forms an auxiliary parallel path.

[0030] A sealing ring 9 is provided on the inner wall of the end of the locking nut 4. The sealing ring 9 seals the end of the load-bearing body 2 when the locking nut 4 is tightened onto the load-bearing body 2, preventing impurities from entering the load-bearing body 2 and affecting the mechanical connection and electrical energy transmission. The sealing ring 9 can be a double-lip sealing ring, a combined sealing ring, or a sealing cap. The locking nut 4 can be equipped with a grease inlet and a vent, allowing conductive anti-corrosion grease or sealing medium to be filled in and air to be expelled.

[0031] Conductive anti-corrosion grease is filled between the conductive base 6 and the elastic conductive sheet 5 to improve the conductivity stability of the independent main conductive path formed by the conductive bridge 7. An anti-seize medium is provided at the connection between the external thread and the locking nut 4 to maintain the connection stability between the locking nut 4 and the load-bearing body 2, while preventing damage to the surface of the load-bearing body 2 from the locking nut 4. The surface of the load-bearing body 2 is coated with an insulating and anti-corrosion coating to prevent power leakage from the main conductive path from affecting the outside environment or workers.

[0032] The surface of the load-bearing body 2 is provided with detection holes 11 corresponding to the conductive seats 6 and conductive bridges 7. The detection holes 11 are designed to allow operators to pass through the corresponding resistance testing probes to detect the equivalent resistance of the conductive seats 6 and conductive bridges 7. Furthermore, the equivalent resistance of the main conductive path can be designed and tested by decomposing the contact resistance of the left round steel grounding body 1, the connection resistance of the left conductive seat 6, the resistance of the conductive bridge 7, the connection resistance of the right conductive seat 6, and the contact resistance of the right round steel grounding body 1, thereby locating the location of resistance anomalies. Furthermore, the detection holes 11 are provided with studs that can seal the detection holes 11 to ensure the sealing of the conductive cavity 13, thereby preventing the main conductive path from being affected by external factors.

[0033] A construction method for a galvanized round steel grounding electrode connector includes the following steps: S1. Specification verification: Verify the diameter of the round steel grounding body 1, the specifications of the load-bearing body 2, the inner diameter range of the elastic conductive sheet 5, and the rated current rating of the conductive bridge 7.

[0034] S2. Zone cleaning: Mark the connection position with the multi-lobed cone 3 and the contact area of ​​the elastic conductive sheet 5 on the round steel grounding body 1 respectively. At the same time, clean the mud, oil and rust on the round steel grounding body 1. Do not grind off the complete galvanized layer on the round steel grounding body 1 over a large area.

[0035] S3. Conductive area pretreatment: Apply a thin layer of the specified conductive anti-corrosion grease only at the contact end between the round steel grounding body 1 and the elastic conductive sheet 5 to prevent anti-corrosion coating, sealant and thread lubricant from entering the contact area between the round steel grounding body 1 and the elastic conductive sheet 5.

[0036] S4. Insertion and positioning: Pass the round steel grounding body 1 through the locking nut 4, the sealing ring 9 and the multi-lobed cone 3, and then continue to insert the elastic conductive contact finger at the end of the round steel grounding body 1. Then, send the round steel grounding body 1 into the bearing body 2 and push the multi-lobed cone 3 into the cone hole 12, so that the elastic conductive sheet 5 can stably contact the conductive seat 6 to generate continuous rebound pressure.

[0037] S5. Mechanical pre-tightening: Using the external thread provided on the outer side of the end of the load-bearing body 2, tighten the locking nut 4 so that the multi-lobed cone 3 is squeezed by the cone hole 12 and circumferentially fitted and locked to the round steel grounding body 1. At the same time, check the coaxiality, insertion depth and contact position of the connection between the round steel grounding body 1 and the load-bearing body 2.

[0038] S6. Final Tightening Limit: Continue to tighten the lock nut 4 according to the specified torque or stroke until the wedge reaches the stroke limit shoulder 10, thereby establishing a stable load-bearing mechanical locking path and limiting the maximum bite depth of the anti-slip teeth.

[0039] S7. Electrical testing: Measure the resistance of the main current path using the four-wire method through the test hole 11 or the two sections of round steel grounding body 1, and record the test value; if necessary, test the segment resistance of each conductive base 6 to the conductive bridge 7 separately.

[0040] S8. Sealing and corrosion protection: The double-stage seal is achieved by the locking nut 4 and the sealing ring 9 at the end. Anti-seize medium is used at the locking nut 4 and the external thread. An external anti-corrosion layer is coated on the surface of the load-bearing body 2 and the outer shell of the locking nut 4. No material is mixed into the conductive cavity 13.

[0041] S9. Verification and Recording: Record the specifications, installation torque or stroke, connection resistance, construction personnel and date, and confirm that the round steel grounding body 1 has no slippage and is completely sealed before backfilling.

[0042] <Example 2> This embodiment is basically the same as Embodiment 1, except that... Figure 4 and Figure 5 As shown, the load-bearing body 2 is a T-shaped cylindrical structure, meaning that the load-bearing body 2 has three channels connecting to the round steel grounding body 1: the left end of the main channel, the right end of the main channel, and a branch channel. The conductive cavity 13 inside the load-bearing body 2 is T-shaped, and the conductive bridge 7 is also T-shaped. The conductive bridge 7 can be formed by threaded splicing of three conductive posts, allowing operators to install the conductive bridge 7 into the conductive cavity 13 for use. Each of the three channels is equipped with an elastic conductive sheet 5 and a conductive seat 6. The three conductive seats 6 are connected to the conductive bridge 7 in the middle conductive cavity 13, thereby allowing the main current between the three sections of the round steel grounding body 1 to be transmitted through the conductive bridge 7 and then distributed to the corresponding round steel grounding body 1 to be guided to the ground.

[0043] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A conductive load-bearing separate circular grounding electrode connector, comprising a load-bearing body (2), the load-bearing body (2) having multiple conical holes (12) and external threads, each conical hole (12) being fitted with a multi-lobed conical cylinder (3), each external thread being threadedly connected with a locking nut (4), and the locking nut (4) and the multi-lobed conical cylinder (3) being able to be sequentially fitted onto the connecting end of the circular steel grounding body (1), so that the load-bearing body (2) can mechanically lock the connecting ends of the multiple circular steel grounding bodies (1) together; characterized in that: The load-bearing body (2) has a conductive cavity (13) inside, which is connected to multiple conical holes (12); The conductive cavity (13) is provided with a conductive bridge (7). The conductive bridge (7) can be connected to the connection end of multiple round steel grounding bodies (1) that are mechanically locked to the load-bearing body (2) to form a conductive path that directly connects multiple round steel grounding bodies (1) with the conductive bridge (7).

2. The conductive load-bearing separate circular grounding electrode connector as described in claim 1, characterized in that: Each conductive bridge (7) is connected to a conductive seat (6) facing the conical hole (12), and an elastic conductive sheet (5) is connected to the conductive seat (6) away from the conductive bridge (7).

3. The conductive load-bearing separate circular grounding electrode connector as described in claim 2, characterized in that: A pre-tightening gasket (8) is provided between the elastic conductive sheet (5) and the conductive seat (6) or between the conductive seat (6) and the inner wall of the conductive cavity (13).

4. The conductive load-bearing separate circular grounding electrode connector as described in claim 3, characterized in that: The pre-tightening gasket (8) can be a disc spring, wave spring, elastic washer or elastic expansion sleeve.

5. The conductive load-bearing separate circular grounding electrode connector as described in claim 2, characterized in that: The load-bearing body (2) is provided with multiple detection holes (11), and the conductive seat (6) and the conductive bridge (7) are connected to the detection holes (11), and the detection holes (11) are sealed by studs.

6. The conductive load-bearing separate circular grounding electrode connector as described in claim 2, characterized in that: The elastic conductive sheet (5) is a circumferentially open crown spring ring, a C-shaped elastic ring, a multi-finger spring ring, a stacked ring-shaped contact finger, or several independent elastic contact fingers.

7. The conductive load-bearing separate circular grounding electrode connector as described in claim 1, characterized in that: The load-bearing body (2) is configured as a columnar sleeve or a T-shaped cylinder.

8. The conductive load-bearing separate circular grounding electrode connector as described in claim 5, characterized in that: The inner wall of the locking nut (4) is provided with a sealing ring (9), which is a double-lip sealing ring.

9. A conductive load-bearing separate circular grounding electrode connector as described in claim 8, characterized in that: The inner wall of the multi-lobed cone (3) is provided with anti-slip teeth, and the end of the cone hole (12) facing the conductive cavity (13) is the small diameter end. The inner diameter of the conductive cavity (13) and the cone hole (12) is smaller than the small diameter end of the cone hole (12) so as to form a limiting shoulder (10) at the cone hole (12) and the conductive cavity (13).

10. The construction method of the conductive load-bearing separate circular grounding electrode connector as described in claim 9, characterized in that: Includes the following steps: S1. Specification verification: Verify the diameter of the round steel grounding body (1), the specifications of the load-bearing body (2), the inner diameter range of the elastic conductive sheet (5), and the rated current level of the conductive bridge (7). S2, Zone cleaning: Mark the connection position with the multi-lobed cone (3) and the contact area of ​​the elastic conductive sheet (5) on the round steel grounding body (1). At the same time, clean the mud, oil and rust on the round steel grounding body (1). Do not grind and remove the complete galvanized layer on the round steel grounding body (1) over a large area. S3. Conductive area pretreatment: Apply the specified conductive anti-corrosion grease only to the contact end between the round steel grounding body (1) and the elastic conductive sheet (5) to prevent anti-corrosion coating, sealant and thread lubricant from entering the contact area between the round steel grounding body (1) and the elastic conductive sheet (5); S4, Insertion and Positioning: Pass the round steel grounding body (1) through the locking nut (4), sealing ring (9) and multi-lobed cone (3), then continue to insert the elastic conductive contact finger at the end of the round steel grounding body (1), then send the round steel grounding body (1) into the load-bearing body (2), and push the multi-lobed cone (3) into the conical hole (12), so that the elastic conductive sheet (5) can stably contact the conductive seat (6) to generate continuous rebound pressure; S5. Mechanical pre-tightening: Using the external thread provided on the outer side of the end of the locking nut (4) and the load-bearing body (2), tighten the locking nut (4) so ​​that the multi-lobed cone (3) is squeezed by the cone hole (12) and circumferentially fitted and locked to the round steel grounding body (1). At the same time, check the coaxiality, insertion depth and contact position of the connection between the round steel grounding body (1) and the load-bearing body (2). S6, final tightening limit: Continue to tighten the lock nut (4) according to the specified torque or stroke until the wedge reaches the stroke limit shoulder (10), thereby establishing a stable load-bearing mechanical locking path, while limiting the maximum bite depth of the anti-slip teeth; S7. Electrical testing: Measure the resistance of the main current path using the four-wire method through the test hole (11) or the two sections of round steel grounding body (1), and record the test value; if necessary, test the segment resistance from each conductive base (6) to the conductive bridge (7) respectively. S8, Sealing and corrosion protection: The double-level seal formed by the thread and sealing ring (9) at the end is completed by locking nut (4) and sealing ring (9). Anti-seize medium is used at the locking nut (4) and external thread. External anti-corrosion layer is coated on the surface of the load-bearing body (2) and the outer shell of locking nut (4). No material is mixed into the conductive cavity (13). S9. Verification and Recording: Record the specifications, installation torque or stroke, connection resistance, construction personnel and date, and confirm that the round steel grounding body (1) has no slippage and is completely sealed before backfilling.

Images