Adapter and deep well type vertical grounding electrode electrical connection assembly

Abstract

The invention discloses an adapter and deep well type vertical grounding electrode electrical connection assembly, the adapter comprises a feed steel pipe sleeve and a diversion cable connection part, and the diversion cable connection part is connected to the pipe circumferential wall of the feed steel pipe sleeve; a plurality of welding holes are formed in the pipe circumferential wall at intervals in the circumferential direction, the welding holes are configured to be through holes penetrating through the pipe circumferential wall, and the feed steel pipe sleeve is connected with the feed steel pipe through the welding holes; a connecting groove is formed in the diversion cable connecting part, the connecting groove penetrates through the surface of the side, away from the feed steel pipe sleeve, of the diversion cable connecting part to form a first opening, the first opening is used for being communicated with a welding jig, and the connecting groove is used for welding a copper core of the diversion cable. According to the application, the copper core can be welded in the connecting groove, so that the connecting and combining part of the diversion cable and the feed steel pipe is shortened, and the subsequent anti-corrosion sealing difficulty is greatly reduced; meanwhile, during heat release welding, the connection grooves can wrap the diversion cable copper core more easily, heat is more concentrated, and melting welding is more sufficient.

Description

Technical Field

[0001] The invention relates to the technical field of direct current power transmission engineering, and in particular to an adapter and a deep well type vertical grounding electrode electrical connection assembly. Background Art

[0002] In the electrical installation of deep well vertical grounding electrodes in DC transmission projects, the connection between the guide cable and the feeder steel pipe is very important. The connection point is usually tens or hundreds of meters underground. Once a fault occurs, no remedial measures can be taken. With the promotion of deep well vertical grounding electrode technology, the connection process between the guide cable and the feeder steel pipe has received more and more attention.

[0003] In the related art, the deep well type vertical grounding electrode current guide cable is connected to the feeder steel pipe by welding. Specifically, the collar and the connecting ear fixed on the outer wall of the collar are welded to the feeder steel pipe and the copper core of the current guide cable respectively.

[0004] However, after the end face of the copper core of the guide cable is welded to the end face of the connecting ear, the lengths of the two are relatively long, which increases the connection area between the guide cable and the feeder steel pipe, thereby increasing the difficulty of anti-corrosion sealing and causing an unstable connection structure. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide an adapter, in which the copper core of the guide cable can be welded by setting a connection groove, shortening the connection and joining part between the guide cable and the feeder steel pipe, greatly reducing the difficulty of subsequent anti-corrosion sealing; at the same time, during exothermic welding, the connection groove is more likely to wrap the copper core of the guide cable, the heat is more concentrated, and the melting welding is more complete.

[0006] According to the adapter of the first aspect of the present invention, the adapter includes a feeder steel pipe casing and a guide cable connecting part, and the guide cable connecting part is connected to the circumferential wall of the feeder steel pipe casing; the circumferential wall is also provided with a plurality of welding holes arranged at intervals along the circumferential direction, and the welding holes are constructed as through holes penetrating the circumferential wall of the feeder steel pipe casing, and the feeder steel pipe casing is connected to the feeder steel pipe through the welding holes; the guide cable connecting part is provided with a connecting groove, and the connecting groove penetrates the side surface of the guide cable connecting part away from the feeder steel pipe casing to form a first opening, and the first opening is used to connect a welding jig, and the connecting groove is used to weld the copper core of the guide cable.

[0007] In some embodiments, the feeder steel pipe casing is extended along a first direction, and an inlet and an outlet are respectively provided at both ends of the feeder steel pipe casing in the first direction; one end of the connecting groove in the first direction penetrates the surface of the guide cable connecting part to form a second opening, and the second opening is connected to the first opening and is used to pass the copper core of the guide cable.

[0008] In some embodiments, the other end of the connecting groove in the first direction is closed.

[0009] In some embodiments, the connecting groove is constructed as an arc groove, and the axis of the arc groove is parallel to the first direction; the connecting groove includes a coaxial welding groove and a positioning groove; one end of the positioning groove in the first direction is connected to the welding groove, and the other end of the positioning groove passes through the surface of the guide cable connecting part along the first direction to form the second opening; the welding groove is used to weld the copper core, and the positioning groove is used to fit the outer peripheral surface of the copper core to align the axis of the copper core.

[0010] In some embodiments, the radius of the welding groove is greater than the radius of the positioning groove.

[0011] In some embodiments, the guide cable connection portion is constructed as a positioning boss that fits on the outer circumferential surface of the feed steel pipe casing, and the surface of the positioning boss on the side away from the feed steel pipe casing is a guide cylinder, and the axis of the guide cylinder is parallel to the first direction.

[0012] According to the second aspect of the present invention, the deep well type vertical grounding electrode electrical connection assembly comprises a feeder steel pipe, a current guide cable and a adapter according to the first aspect of the present invention; the current guide cable has a copper core; the feeder steel pipe and the copper core of the current guide cable are connected via the adapter.

[0013] In some embodiments, the diameter of the feeder steel pipe casing is the same as the diameter of the feeder steel pipe.

[0014] In some embodiments, the welding holes include a first welding hole, a second welding hole, and a third welding hole, which are arranged in sequence along the circumference of the feed steel pipe casing. The interval angle between the first welding hole and the second welding hole is 90°, and the angle between the second welding hole and the third welding hole is 90°. The guide cable welding portion is arranged between the first welding hole and the third welding hole.

[0015] In some embodiments, the adapter is made of copper material; the total area of ​​the plurality of welding holes is S1; the cross-sectional area of ​​the copper core is S2; wherein S1≥5.6*S2.

[0016] It can be seen from the technical solution that the embodiment provided by the present invention has the following advantages: by setting a connecting groove structure in the guide cable connecting part, the copper core of the guide cable can be welded in the connecting groove, shortening the connection part between the guide cable and the feeding steel pipe, greatly reducing the difficulty of subsequent anti-corrosion sealing, and the disturbance of the guide cable has less impact on the sealing layer; at the same time, during exothermic welding, the copper core of the guide cable is accommodated in the connecting groove, and the connecting groove is more likely to wrap the copper core of the guide cable, so the heat is more concentrated and the melting and welding are more complete. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 is a schematic structural diagram of an adapter according to an embodiment of the present invention at a viewing angle;

[0019] Figure 2 is a schematic structural diagram of an adapter according to an embodiment of the present invention from another viewing angle;

[0020] Figure 3 is a schematic structural diagram of an adapter according to an embodiment of the present invention at another viewing angle;

[0021] Figure 4 is a schematic structural diagram of an adapter according to an embodiment of the present invention at another viewing angle;

[0022] Figure 5-Figure 8 is a schematic diagram of welding of an adapter and a guide cable at different viewing angles according to an embodiment of the present invention;

[0023] Figure 9-12 1 is a schematic diagram of the structure of a deep well type vertical grounding electrode electrical connection assembly at different viewing angles according to an embodiment of the present invention;

[0024] Fig.13 The invention is an assembly step of assembling a feeder steel pipe, a guide cable and a transition piece into a deep well type vertical grounding electrode electrical connection assembly.

[0025] Reference numerals:

[0026] Deep well type vertical grounding electrode electrical connection assembly 100;

[0027] Adapter 1, feeder steel pipe sleeve 11, welding hole 111, first welding hole 1111, second welding hole 1112, third welding hole 1113, guide cable connecting part 12, connecting groove 121, first opening 1211, second opening 1212, welding groove 1213, positioning groove 1214,

[0028] Feeder steel pipe 2;

[0029] Guide cable 3, copper core 31;

[0030] Welding head 4. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Reference below Figure 1-Figure 13 The adapter 1 and the deep-well type vertical grounding electrode electrical connection assembly 100 according to the embodiment of the present invention are described.

[0035] Embodiment 1

[0036] like Figure 1-Figure 4 As shown, an embodiment of the present invention provides an adapter 1, which includes a feeder steel pipe casing 11 and a guide cable connection portion 12, and the guide cable connection portion 12 is connected to the circumferential wall of the feeder steel pipe casing 11. A welding hole 111 is provided on the circumferential wall of the feeder steel pipe casing 11, and the number of the welding holes 111 is multiple, and the multiple welding holes 111 are arranged at intervals along the circumference of the feeder steel pipe casing 11. Each welding hole 111 penetrates the circumferential wall of the feeder steel pipe casing 11 to form a through hole, and the welding hole 111 is connected to the internal space surrounded by the circumferential wall of the feeder steel pipe casing 11, and the feeder steel pipe casing 11 is connected to the feeder steel pipe 2 through the welding hole 111.

[0037] A connecting groove 121 is provided on the guide cable connecting part 12, and the connecting groove 121 passes through the side surface of the guide cable connecting part 12 away from the feeder steel pipe casing 11 to form a first opening 1211. The first opening 1211 can be connected to the welding groove of the welding fixture, and the connecting groove 121 is used for welding the copper core 31 of the guide cable 3.

[0038] It is also necessary to further explain that the welding between the copper core 31 of the guide cable 3 and the guide cable connecting part 12 requires the aid of a welding jig. The connecting groove 121 and the welding jig form a receiving cavity for accommodating solder, and the connecting groove 121 and the welding jig are connected through the first opening 1211. The specific welding process is: the copper core 31 of the guide cable 3 is accommodated in the connecting groove 121 and the receiving cavity surrounded by the welding jig, and then the solder is filled in the receiving cavity, and finally the welding jig is separated from the adapter 1, and the copper core 31 of the guide cable 3 is welded in the connecting groove 121. During exothermic welding, the copper core 31 of the guide cable 3 is accommodated in the connecting groove 121, and the connecting groove 121 is more likely to form a wrapping around the copper core 31 of the guide cable 3, the heat is more concentrated, and the melting and welding are more complete.

[0039] Among them, part of the feeder steel pipe 2 is accommodated in the internal space surrounded by the peripheral wall of the feeder steel pipe sleeve 11, and is welded through the welding hole 111 on the peripheral wall, thereby realizing the connection between the feeder steel pipe sleeve 11 and the feeder steel pipe 2, and the connection here includes mechanical connection and electrical connection. The guide cable connection part 12 can accommodate the copper core 31 of the guide cable 3 in the connection groove 121 through the first opening 1211, and then realize the connection between the guide cable connection part 12 and the copper core 31 by welding. The copper core 31 of the guide cable 3 is the conductor of the guide cable 3. It is welded in the connection groove 121, which not only realizes the mechanical fixation between the copper core 31 of the guide cable 3 and the guide cable connection part 12, but also realizes the electrical connection between the two. It can be seen that in the electrical installation of the deep well vertical grounding electrode of the DC transmission project, the guide cable 3 and the feeder steel pipe 2 are mechanically and electrically connected through the adapter 1.

[0040] like Figure 5As shown, the copper core 31 of the guide cable 3 is welded to the connecting groove 121 to form a welding joint 4.

[0041] After the adapter 1 realizes the connection between the feeder steel pipe 2 and the guide cable 3, a deep well type vertical grounding electrode electrical connection assembly 100 is formed. The installer also needs to pour anti-corrosion sealing material on the deep well type vertical grounding electrode electrical connection assembly 100. Since the connection groove 121 is provided in the guide cable connection part 12, the copper core 31 of the guide cable 3 can be welded in the connection groove 121, that is, the copper core 31 of the guide cable 3 is connected to the radial outer side of the pipe wall, which shortens the length of the connection part between the guide cable 3 and the feeder steel pipe 2, greatly reducing the difficulty of subsequent anti-corrosion sealing.

[0042] Compared with the related art, by setting a connecting groove 121 in the guide cable connecting part 12, the copper core 31 of the guide cable 3 can be welded in the connecting groove 121, shortening the connection part between the guide cable 3 and the feeding steel pipe 2, greatly reducing the difficulty of subsequent anti-corrosion sealing, and the disturbance of the guide cable 3 has less impact on the sealing layer; at the same time, during exothermic welding, the copper core 31 of the guide cable 3 is accommodated in the connecting groove 121, and the connecting groove 121 is more likely to form a wrapping for the copper core 31 of the guide cable 3, so that the heat is more concentrated and the melting and welding are more complete.

[0043] Embodiment 2

[0044] Combination Figure 1 and Fig. 9 As shown, further, the feeder steel pipe sleeve 11 is extended along the first direction, the feeder steel pipe 2 is provided with an inlet at one end in the first direction, and the feeder steel pipe 2 is provided with an outlet at the other end in the first direction. The connection groove 121 penetrates the surface of the guide cable connection part 12 at one end in the first direction to form a second opening 1212, and the second opening 1212 is connected to the first opening 1211 and is used to pass the copper core 31 of the guide cable 3. The insertion direction of the guide cable 3 and the insertion direction of the feeder steel pipe 2 are both along the first direction, which is the same as the extension direction of the guide cable 3 and the extension direction of the feeder steel pipe 2. The feeder steel pipe 2 can be inserted into the feeder steel pipe sleeve 11 through the inlet along the first direction, and continue to extend into the feeder steel pipe sleeve 11 of another adapter 1 through the outlet. The copper core 31 of the guide cable 3 can enter the connection groove 121 through the second opening 1212 along the first direction. Thereby, the convenience of assembling between the adapter 1 and the feeder steel pipe 2 and the convenience of assembling between the adapter 1 and the guide cable 3 can be improved.

[0045] In a specific embodiment, the feeder steel pipe casing 11 is constructed as a cylindrical structure extending along the first direction, the axis of the cylindrical structure is parallel to the first direction, and the two ends of the cylindrical structure in the first direction are open to form an inlet and an outlet for passing the feeder steel pipe 2, and the feeder steel pipe 2 can be accommodated in the internal space surrounded by the cylindrical structure. Welding holes 111 are opened on the side circumferential wall of the cylindrical structure, and the welding holes 111 are arranged at intervals around the axis of the cylindrical structure.

[0046] Combination Figure 1 and Figure 5 As shown, further, the other end of the connection groove 121 in the first direction is closed, thereby positioning the insertion depth of the copper core 31 of the guide cable 3, further improving the convenience of assembly.

[0047] Embodiment 3

[0048] Combination Figure 1-Figure 4 As shown, further, the connection groove 121 is constructed as an arc groove, and the axis of the arc groove is parallel to the first direction; the connection groove 121 includes a welding groove 1213 and a positioning groove 1214, the welding groove 1213 and the positioning groove 1214 are coaxially arranged, one end of the positioning groove 1214 in the first direction is connected to the welding groove 1213, and the other end of the positioning groove 1214 passes through the surface of the guide cable connecting part 12 along the first direction to form a second opening 1212, the welding groove 1213 is used to weld the copper core 31, and the positioning groove 1214 is used to fit the outer peripheral surface of the copper core 31. The copper core 31 enters the positioning groove 1214 through the second opening 1212, and then reaches the welding groove 1213. The positioning groove 1214 is designed according to the size of the copper core 31. The positioning groove 1214 fits the outer peripheral surface of the copper core 31 so that the axis of the positioning groove 1214 is aligned with the axis of the copper core 31, thereby realizing the axial positioning of the copper core 31 in the welding groove 1213, so that the axis of the copper core 31 is in line with the axis of the welding groove 1213. As a result, the solder in the welding groove 1213 can better wrap the copper core 31, thereby improving the stability and reliability of the copper core 31 being welded in the welding groove 1213.

[0049] like Figure 3 As shown, further, the radius of the welding groove 1213 is greater than the radius of the positioning groove 1214. The welding groove 1213 with a larger radius can provide a more spacious space to accommodate the solder. During the welding process, a certain amount of solder is required to fill the gap between the copper core 31 and the welding groove 1213 to form a strong connection. The larger radius of the welding groove 1213 can ensure that there is enough space for the solder to flow and distribute fully, thereby forming a uniform and thick solder layer around the copper core 31, enhancing the strength and conductivity of the welding head 4, reducing problems such as cold welding and leaking welding, and improving the welding quality.

[0050] See also Figure 5-Figure 8In combination with the above-mentioned embodiment 1, it can be known that the welding groove 1213 and the welding fixture surround a receiving cavity for receiving solder, the copper core 31 is welded in the welding groove 1213 and forms a welding head 4 in the welding groove 1213, and the shape of the welding head 4 is consistent with the shape of the cavity, so the radius of the welding head 4 is the same as the radius of the welding groove 1213. Therefore, the radial dimension of the welding head 4 is greater than the radial dimension of the positioning groove 1214, the positioning groove 1214 is located at the upper part of the welding groove 1213 to form a closing structure, and the lower part of the welding groove 1213 is closed to form a closed structure. The welding head 4 is located in the welding groove 1213. When the welding head 4 is subjected to tension or pressure in the first direction, the closing structure and the closed structure can protect the welding head 4 and reduce the probability of the welding head 4 being separated from the welding groove 1213.

[0051] In a specific example, combining Figure 5-Figure 8 The welding head 4 is cylindrical in shape, that is, a cylindrical cavity for accommodating solder is set between the welding groove 1213 and the welding fixture, the axis of the cylindrical cavity is the same as the axis of the welding groove 1213, and the radius of the cylindrical cavity is the same as the radius of the welding groove 1213.

[0052] Embodiment 4

[0053] like Figure 1 and Figure 2 As shown, further, the guide cable connecting portion 12 is constructed as a positioning boss that fits on the outer circumferential surface of the feeder steel pipe casing 11, and the surface of the positioning boss on the side away from the feeder steel pipe casing 11 is a guide cylinder, and the axis of the guide cylinder is parallel to the first direction.

[0054] Combination Figure 4 As shown, in combination with the above-mentioned embodiment 1, it can be known that the connection groove 121 is a groove opened on the positioning boss. By setting the positioning boss, on the one hand, during the installation process, the positioning boss can quickly locate the matching position of the adapter 1 and the welding jig, thereby improving the accuracy of the matching between the two and the convenience of assembly; on the other hand, in actual use, the setting of the positioning boss makes the pipe wall at the connection groove 121 thicker, which can increase the allowable current carrying capacity of the current feeding position and reduce the heat generation during operation. At the same time, the surface of the positioning boss on the side away from the feeding steel pipe casing 11 is a guide cylinder, which can better guide the assembly position between the positioning boss and the welding jig, which is beneficial to reduce the probability of damage to the positioning boss.

[0055] Embodiment 5

[0056] like Figure 9-12As shown, the second embodiment of the present invention further provides a deep well type vertical grounding electrode electrical connection assembly 100. The deep well type vertical grounding electrode electrical connection assembly 100 comprises a feeder steel pipe 2, a guide cable 3 and an adapter 1 of the first embodiment of the present invention; the guide cable 3 has a copper core 31; the feeder steel pipe 2 and the copper core 31 of the guide cable 3 are connected through the adapter 1.

[0057] The deep well type vertical grounding electrode electrical connection assembly 100 of the embodiment of the present invention has a structure in which a connection groove 121 is provided in the guide cable connection part 12, and the copper core 31 of the guide cable 3 can be welded in the connection groove 121, thereby shortening the connection and joining part between the guide cable 3 and the feeder steel pipe 2, and greatly reducing the difficulty of subsequent anti-corrosion sealing; at the same time, during exothermic welding, the copper core 31 of the guide cable 3 is accommodated in the connection groove 121, and the connection groove 121 is more likely to form a wrapping for the copper core 31 of the guide cable 3, so that the heat is more concentrated and the melting and welding are more complete.

[0058] like Figure 9-12 As shown, further, the diameter of the feeder steel pipe sleeve 11 is the same as the diameter of the feeder steel pipe 2, and the feeder steel pipe sleeve 11 can tightly cover the feeder steel pipe 2 to form a mechanical connection; compared with interference fit or using the thermal expansion and contraction of the material to cover the feeder steel pipe 2, this embodiment has higher operability and is more convenient for the assembly operation between the feeder steel pipe sleeve 11 and the feeder steel pipe 2.

[0059] It should be emphasized that in the related art, the connection between the feeder steel pipe casing and the feeder steel pipe usually adopts the technical solution of thermal expansion and contraction or interference fit sleeve connection. The applicant found in actual application that the technical solution of thermal expansion and contraction or interference fit sleeve connection is not suitable for actual operation on site. For example, heating the adapter will cause rapid oxidation of the adapter surface, and interference fit is not convenient for operation.

[0060] like Fig.12 As shown, further, the welding hole 111 includes three first welding holes 1111, second welding holes 1112 and third welding holes 1113 arranged in sequence along the circumference of the feeder steel pipe casing 11, the interval angle between the first welding hole 1111 and the second welding hole 1112 is 90°, the angle between the second welding hole 1112 and the third welding hole 1113 is 90°, and the welding portion of the guide cable 3 is arranged between the first welding hole 1111 and the third welding hole 1113. Three welding holes 111 are opened on the circumference of the feeder steel pipe casing 11, and the welding holes 111 are used for exothermic welding with the feeder steel pipe 2 to form an electrical connection. The design of multiple welding holes 111 is conducive to dispersing welding heat, uniform force, and reducing welding difficulty. Through experiments, it is shown that the design of three welding holes 111 can meet the relevant requirements for tensile strength without the need for interference fit sleeve connection between the feeder steel pipe casing 11 and the feeder steel pipe 2.

[0061] Specifically, the tensile force data obtained through the experiment are as follows:

[0062] 1) The tensile strength of a single welding hole 111 is 77433N, the tensile strength of two welding holes is 154866N, and the tensile strength of three welding holes is 232299N.

[0063] 2) In a typical deep well vertical grounding electrode current conducting cable engineering case, the cross-sectional area of ​​the cable copper core is 300mm2, and the tensile strength of the copper wire body is 61500N, that is, the design of a single welding hole 111 has a tensile strength greater than the tensile strength of the cable copper core body 61500N.

[0064] Furthermore, the adapter 1 is made of copper. The total area of ​​the plurality of welding holes 111 is S1; the cross-sectional area of ​​the copper core 31 is S2; wherein S1≥5.6*S2. The total welding area of ​​the welding holes 111 satisfies that it is greater than 5.6 times the cross-sectional area of ​​the copper core 31 of the guide cable 3, so that the contact resistance between the feeder steel pipe 2 and the guide cable 3 is not greater than the resistance of the guide cable 3 itself.

[0065] Specifically, the material of the adapter 1 is high-quality copper, and it is manufactured using CNC (Computer numerical control). The resistance is proportional to the resistivity and length of the material, and inversely proportional to the cross-sectional area, that is, R=ρL / S (where R represents resistance, ρ represents the resistivity of the material, L represents the length of the material, and S represents the cross-sectional area). The resistivity of copper is 1.75×10 -8 Ω•m, the resistivity of steel is 9.78×10 -8 Ω•m, the difference between the two is about 5.6 times. When the copper core 31 of the guide cable 3 is welded to the feeder steel pipe 2, the two materials are directly welded, which cannot ensure that the contact resistance of the welding point is not greater than the resistance of the guide cable 3 body at the same length. By adding a copper adapter 1, enlarging the cross-section of the copper core 31 of the guide cable 3, and setting the total welding area of ​​the welding hole 111 to be greater than 5.6 times the cross-sectional area of ​​the copper core 31 of the guide cable 3, it can be ensured that the contact resistance between the feeder steel pipe 2 and the cable is not greater than the resistance of the guide cable 3 itself.

[0066] It should be further explained that, when welding, sufficient solder is required, and the accommodating cavity enclosed between the welding fixture and the adapter 1 needs to be large enough to allow the flux to cover the welding hole 111 and fully contact the welding hole 111 .

[0067] The other components and operations of the deep well type vertical grounding electrode electrical connection assembly 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here. In the description of the present invention, "first feature" and "second feature" may include one or more of these features. Among them, the up-down direction, left-right direction and front-back direction shall be based on the up-down direction, left-right direction and front-back direction shown in the figure.

[0068] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A transfer component, characterized in that: include: A feeder steel pipe casing (11) and a guide cable connection portion (12), wherein the guide cable connection portion (12) is connected to the circumferential wall of the feeder steel pipe casing (11); The tube peripheral wall is also provided with a plurality of welding holes (111) arranged at intervals in the circumferential direction, the welding holes (111) being configured as through holes penetrating the tube peripheral wall of the feeder steel tube casing (11), the feeder steel tube casing (11) being connected to the feeder steel tube (2) via the welding holes (111); The guide cable connection portion (12) is provided with a connection groove (121), the connection groove (121) penetrating a side surface of the guide cable connection portion (12) facing away from the feeder steel pipe casing (11) to form a first opening (1211), the first opening (1211) being used to connect to a welding jig, and the connection groove (121) being used to weld the copper core of the guide cable.

2. The adapter according to claim 1, characterized in that: The feeder steel pipe casing (11) is extended along a first direction, and an inlet and an outlet are respectively provided at two ends of the feeder steel pipe casing (11) in the first direction; One end of the connection groove (121) in the first direction penetrates the surface of the guide cable connection portion (12) to form a second opening (1212); the second opening (1212) is connected to the first opening (1211) and is used for passing the copper core (31) of the guide cable (3).

3. The adapter according to claim 2, characterized in that: The other end of the connecting groove (121) in the first direction is closed.

4. The adapter according to claim 2, characterized in that: The connecting groove (121) is configured as an arc-shaped groove, and the axis of the arc-shaped groove is parallel to the first direction; The connecting groove (121) comprises a coaxial welding groove (1213) and a positioning groove (1214); One end of the positioning groove (1214) in the first direction is connected to the welding groove (1213), and the other end of the positioning groove (1214) passes through the surface of the guide cable connecting part (12) along the first direction to form the second opening (1212); The welding groove (1213) is used for welding the copper core (31), and the positioning groove (1214) is used for fitting the outer peripheral surface of the copper core (31) to align the axis of the copper core (31).

5. The adapter according to claim 4, characterized in that: The radius of the welding groove (1213) is greater than the radius of the positioning groove (1214).

6. The adapter according to claim 1, characterized in that: The guide cable connection portion (12) is constructed as a positioning boss that fits on the outer peripheral surface of the feeder steel pipe sleeve (11), and the surface of the positioning boss on the side away from the feeder steel pipe sleeve (11) is a guide cylinder, and the axis of the guide cylinder is parallel to the first direction.

7. A deep well type vertical grounding electrode electrical connection assembly, characterized in that: include: The adapter (1) according to any one of claims 1 to 6; A feeder steel pipe (2) and a current guide cable (3), wherein the current guide cable (3) has a copper core (31); The feeder steel pipe (2) and the copper core (31) of the guide cable (3) are connected via the adapter (1).

8. The deep well type vertical grounding electrode electrical connection assembly according to claim 7, characterized in that: The diameter of the feeder steel pipe casing (11) is the same as the diameter of the feeder steel pipe (2).

9. The deep well type vertical grounding electrode electrical connection assembly according to claim 7, characterized in that: The welding holes (111) comprise three first welding holes (1111), second welding holes (1112) and third welding holes (1113) which are sequentially arranged along the circumference of the feeder steel pipe casing (11); the interval angle between the first welding hole (1111) and the second welding hole (1112) is 90°, the angle between the second welding hole (1112) and the third welding hole (1113) is 90°, and the welding portion of the guide cable (3) is arranged between the first welding hole (1111) and the third welding hole (1113).

10. The deep well type vertical grounding electrode electrical connection assembly according to claim 7 or 9, characterized in that: The adapter (1) is made of copper material; The total area of ​​the plurality of welding holes (111) is S1; The cross-sectional area of ​​the copper core (31) is S2; Among them, S1≥5.6*S2.

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