Universal ground rod connecting piece for coal mine

Abstract

The utility model provides a universal ground rod connecting piece for a coal mine, and particularly relates to the technical field of ground rods. The connecting piece comprises a grounding positioning sleeve, a fixed locking screw rod, a connecting shaft and a grounding wire pressing bolt, a fixing hole is formed in the surface of the grounding positioning sleeve, and the grounding wire pressing bolt is in threaded connection with the fixing hole; the two ends of the fixed locking screw rod are connected with the grounding positioning sleeve and the cylinder cavity of the coupling shaft in an inserted mode. The fixed locking screw rod is in sliding connection with a sleeve cavity of the grounding positioning sleeve; the fixed locking screw rod is fixedly connected with a barrel cavity of the connecting shaft; the outer surface of the fixed locking lead screw is further movably sleeved with a compression spring. And one end, far away from the fixed locking screw rod, of the coupling shaft is fixedly connected with the insulating handle. The grounding rod is simple in structure and convenient to disassemble and assemble, the universality of the grounding rod can be met by replacing the adaptive grounding positioning sleeve, the contact reliability of the high-voltage switch and the grounding rod is ensured, and meanwhile, the problem of winding of a grounding wire is avoided.

Description

Technical Field

[0001] This utility model relates to the field of grounding rod technology, specifically to a universal grounding rod connector for coal mines. Background Technology

[0002] During the maintenance of high-voltage electrical equipment in coal mines, a series of procedures are required, including power outage, voltage testing, discharge, and installation of grounding rods. However, during the installation of grounding rods, the existing methods for discharging and grounding the grounding rods and the internal pressure bolts of the high-voltage switch mostly use ordinary clamps and duckbill clamps. These two methods have poor reliability and are prone to loosening, which can easily cause the grounding rod to fall off the pressure bolts. This results in low safety and reliability during the maintenance of high-voltage electrical equipment in coal mines, posing a significant safety hazard. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a universal grounding rod connector for coal mines, the specific technical solution of which is as follows:

[0004] A universal grounding rod connector for coal mines includes a grounding positioning sleeve, a fixing locking screw, a connecting shaft, and a grounding wire clamping bolt. Both the grounding positioning sleeve and the connecting shaft are hollow cylindrical structures. A fixing hole is formed on the surface of the grounding positioning sleeve, and the grounding wire clamping bolt is threaded into the fixing hole. A positioning groove, matching the shape of the internal clamping nut of a high-voltage switch, is provided circumferentially on the inner wall of the end of the grounding positioning sleeve away from the fixing locking screw. The cylindrical cavity of the grounding positioning sleeve near the fixing locking screw is divided into a first cavity and a second cavity. The outer wall of the fixing locking screw near the grounding positioning sleeve is provided with an annular boss; both ends of the fixing locking screw are respectively inserted into the cavity of the grounding positioning sleeve and the connecting shaft; wherein, the fixing locking screw is fixedly connected to the cavity of the connecting shaft; the fixing locking screw is slidably connected to the first cavity of the grounding positioning sleeve through the annular boss; a compression spring is also movably sleeved on the outer surface of the fixing locking screw between the grounding positioning sleeve and the connecting shaft; the end of the connecting shaft away from the fixing locking screw is fixedly connected to an insulating handle.

[0005] Preferably, the positioning groove has an inner hexagonal structure.

[0006] Preferably, the fixing locking screw has a wire clamping bolt hole on its axial side near the grounding positioning sleeve.

[0007] Preferably, the connecting shaft has a first connecting through hole for installing the connecting bolt on its radial side away from the pressure bolt hole; the fixing locking screw has a second connecting through hole on its radial side corresponding to the position of the first connecting through hole; the fixing locking screw is fixedly connected to the connecting shaft by the connecting bolt.

[0008] Preferably, both ends of the connecting bolt are fastened to the outer wall of the connecting shaft by nuts.

[0009] Preferably, the outer surface of the grounding bolt and the portion extending out of the fixing hole are fitted with spring washers and flat washers from top to bottom.

[0010] Preferably, one end of the compression spring abuts against the outer end face of the grounding positioning sleeve, and the other end abuts against the outer end face of the connecting shaft.

[0011] More preferably, the outer diameter of the annular boss of the fixing locking screw is adapted to the diameter of the first cavity of the grounding positioning sleeve; the outer diameter of the rod body of the fixing locking screw is adapted to the diameter of the second cavity of the grounding positioning sleeve and the cavity of the connecting shaft.

[0012] Even more preferably, the diameter of the first cavity is larger than the diameter of the second cavity.

[0013] More preferably, the diameter of the first connecting through hole is the same as the diameter of the second connecting through hole.

[0014] The beneficial effects of this utility model are:

[0015] 1. The inner wall of the grounding positioning sleeve of this utility model is provided with a positioning groove that is compatible with the high voltage switch wire clamping nut. When connecting the grounding rod and the high voltage switch, rotating the insulating handle will not cause the grounding positioning sleeve itself to rotate with the rotation of the insulating handle. Consequently, the grounding wire clamping bolt on its surface will not rotate. That is, the rotation of the insulating handle will not affect the grounding wire fixed with the grounding wire clamping bolt, thus preventing the grounding wire from becoming entangled.

[0016] 2. This utility model, through the cooperation of the grounding positioning sleeve and the fixing locking screw, can firmly fix the grounding rod to the pressure bolt inside the high-voltage switch and the nut on its surface in the pressure bolt hole of the fixing locking screw and the positioning groove of the grounding positioning sleeve, thus ensuring the reliability of the contact between the high-voltage switch and the grounding rod.

[0017] 3. This utility model uses the annular boss of the fixed locking screw to cooperate with the first and second cavities of the grounding positioning sleeve, which can prevent the fixed locking screw from slipping out of the cavity of the grounding positioning sleeve;

[0018] 4. In order to meet the versatility of grounding rods in coal mines, the positioning groove of this utility model is set as an inner hexagon that matches the shape of the internal pressure nut of the high-voltage switch. When in use, the grounding positioning sleeve that matches the different pressure nut sizes can be replaced, thus expanding the scope of application. Attached Figure Description

[0019] The accompanying drawings constituting this utility model are provided to further understand this application and do not constitute an undue limitation on this application.

[0020] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0021] Figure 2 A cross-sectional view of the grounding positioning sleeve;

[0022] Figure 3 This is a sectional view of the connecting shaft;

[0023] Figure 4 A cross-sectional view of the locking screw;

[0024] In the diagram, 1-grounding positioning sleeve; 101-fixing hole; 102-positioning groove; 103-first cylinder cavity; 104-second cylinder cavity; 2-grounding wire clamping bolt; 3-spring washer; 4-flat washer; 5-compression spring; 6-connecting shaft; 601-first connecting through hole; 7-connecting bolt; 8-nut; 9-fixing locking screw; 901-second connecting through hole; 902-pressing bolt hole; 903-annular boss. Detailed Implementation

[0025] The specific implementation of the universal grounding rod connector for coal mines provided by this utility model will be further described with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 As shown, a general-purpose grounding rod connector for coal mines includes a grounding positioning sleeve 1, a connecting shaft 6, a fixing locking screw 9, and a grounding wire bolt 2 disposed on the outer wall of the grounding positioning sleeve 1.

[0027] Preferably, both the grounding positioning sleeve 1 and the connecting shaft 6 are hollow cylindrical structures; the side wall of the grounding positioning sleeve 1 is radially provided with fixing holes 101 for installing the grounding wire bolt 2, such as... Figure 2 As shown. The grounding bolt 2 is threadedly connected to the fixing hole 101; the inner side wall of the end of the grounding positioning sleeve 1 away from the fixing locking screw 9 is provided with a positioning groove 102 along the circumference that matches the shape of the internal pressure nut of the high-voltage switch. When one end of the grounding positioning sleeve 1 of the grounding rod is connected to the high-voltage switch, the pressure nut is exactly located in the positioning groove 102 to complete the limit.

[0028] To prevent the locking screw 9 from slipping out of the cavity of the grounding positioning sleeve 1, an annular boss 903 is provided on the outer wall of the end of the locking screw 9 near the grounding positioning sleeve 1; the cavity of the grounding positioning sleeve 1 near the locking screw 9 is divided into a first cavity 103 and a second cavity 104. Preferably, the diameter of the first cavity 103 is larger than the diameter of the second cavity 104; the outer diameter of the annular boss 903 is adapted to the diameter of the first cavity 103 of the grounding positioning sleeve 1; and the outer diameter of the locking screw 9 is adapted to the diameter of the second cavity 104 of the grounding positioning sleeve 1.

[0029] Preferably, both ends of the fixing locking screw 9 are respectively inserted into the cavities of the grounding positioning sleeve 1 and the connecting shaft 6. Specifically, the fixing locking screw 9 is slidably connected to the first cavity 103 of the grounding positioning sleeve 1 via an annular boss 903; the shaft of the fixing locking screw 9 is fixedly connected to the cavity of the connecting shaft 6, and the end of the connecting shaft 6 away from the fixing locking screw 9 is fixedly connected to the insulating handle of the grounding rod.

[0030] It is worth noting that, in order to improve the versatility of the grounding rod, the positioning groove 102 of the grounding positioning sleeve 1 provided by this utility model is hexagonal and can be set to various sizes to match the internal pressure nut of the high-voltage switch. That is, various matching grounding positioning sleeves 1 can be made according to the actual size of the pressure nut. When using, the grounding positioning sleeve 1 that matches the different pressure nuts can be replaced. This makes it more versatile and has a wider range of applications.

[0031] Preferably, the end of the fixing locking screw 9 near the grounding positioning sleeve 1 is provided with a wire bolt hole 902 along its axial direction for threaded connection with the wire bolt inside the high voltage switch.

[0032] During installation, the high-voltage switch's wire-pressing bolt first extends into the cavity of the grounding positioning sleeve 1 and is aligned with the opening of the wire-pressing bolt hole 902. To ensure that the wire-pressing nut part of the wire-pressing bolt can continue to extend and smoothly enter the positioning groove 102 of the grounding positioning sleeve 1, it is required that the side of the fixing locking screw 9 with the annular boss 903 cannot be completely slid into the cavity of the grounding positioning sleeve 1. The outer surface of the fixing locking screw 9 located between the grounding positioning sleeve 1 and the connecting shaft 6 is also movably fitted with a compression spring 5, with one end of the compression spring 5 abutting against the outer end face of the grounding positioning sleeve 1 and the other end abutting against the outer end face of the connecting shaft 6.

[0033] Preferably, in order to ensure a tight connection between the grounding wire and the grounding rod, the outer surface of the grounding wire bolt 2 and the portion extending out of the fixing hole 101 are fitted with spring washers 3 and flat washers 4 from top to bottom.

[0034] like Figure 3-4As shown, the connecting shaft 6 has a first connecting through hole 601 for installing the connecting bolt 7 on the side away from the pressure bolt hole 902 along its radial direction; the fixing locking screw 9 has a second connecting through hole 901 in the radial direction corresponding to the position of the first connecting through hole 601, the diameter of the first connecting through hole 601 is the same as the diameter of the second connecting through hole 901 and is adapted to the connecting bolt 7; the fixing locking screw 9 is fixedly connected to the connecting shaft 6 by the connecting bolt 7, and the two ends of the connecting bolt 7 are respectively fixed to the outer wall of the connecting shaft 6 by nuts 8.

[0035] More preferably, the outer diameter of the locking screw 9 is adapted to the diameter of the connecting shaft 6.

[0036] In use, the positioning groove 102 of the grounding positioning sleeve 1 is fitted onto the wire nut inside the high-voltage switch. At this time, the wire bolt is aligned with the wire bolt hole 902 of the locking screw 9. The insulating handle is rotated to cause the connecting shaft 6 and the locking screw 9 to rotate together until the wire bolt inside the high-voltage switch is fully screwed into the wire bolt hole 902, and the annular boss 903 of the locking screw 9 abuts against the wire nut inside the high-voltage switch. Rotation is then stopped, and the insulating handle is released. At this point, the grounding rod is tightly connected to the wire bolt and wire nut inside the high-voltage switch through this connector. Simultaneously, because the positioning groove 102 of the grounding positioning sleeve 1 matches the shape of the wire nut inside the high-voltage switch, it limits the wire nut's position. Therefore, when the insulating handle is rotated, the grounding wire will not rotate with the grounding positioning sleeve 1, thus preventing the grounding wire from becoming entangled.

[0037] The grounding rod connector provided by this utility model is convenient, quick, safe, reliable, and low in manufacturing cost. It ensures the reliability of the connection between the grounding rod and the internal pressure bolt of the high-voltage switch, effectively avoids the safety hazards caused by unreliable grounding when electrical maintenance personnel are repairing high-voltage switches, and greatly reduces the occurrence of electromechanical accidents.

[0038] In this utility model, terms such as "upper," "lower," "bottom," and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are merely used to facilitate the description of the structural relationships of the various components or elements of this utility model and do not specifically refer to any part or element of this utility model; they should not be construed as limiting this utility model. Terms such as "connected" and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be determined according to the specific circumstances, and they should not be construed as limiting this utility model.

[0039] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A universal ground rod connector for coal mines, characterized in that, The grounding positioning sleeve, the fixed locking screw rod, the coupling shaft and the crimping ground wire bolt are included; The grounding positioning sleeve and the coupling shaft are both hollow cylinder structures; the surface of the grounding positioning sleeve is provided with a fixing hole, and the crimping ground wire bolt is threadedly connected with the fixing hole; the inner side wall of the end of the grounding positioning sleeve away from the fixed locking screw rod is provided with a positioning groove in the circumferential direction, which is matched with the shape of the internal wire pressing nut of the high-voltage switch; the cylinder cavity of the side of the grounding positioning sleeve close to the fixed locking screw rod is divided into a first cylinder cavity and a second cylinder cavity; The outer side wall of the end of the fixed locking screw rod close to the grounding positioning sleeve is provided with an annular boss; the two ends of the fixed locking screw rod are respectively inserted into the cylinder cavities of the grounding positioning sleeve and the coupling shaft; wherein the fixed locking screw rod is fixedly connected with the cylinder cavities of the coupling shaft; the fixed locking screw rod is slidably connected with the first cylinder cavity of the grounding positioning sleeve through the annular boss; The part of the outer surface of the fixed locking screw rod between the grounding positioning sleeve and the coupling shaft is further movably sleeved with a pressing spring; The end of the coupling shaft away from the fixed locking screw rod is fixedly connected with the insulating handle.

2. The universal ground rod connector for coal mines of claim 1, wherein, The positioning groove is in the form of an internal hexagon.

3. The universal ground rod connector for coal mines of claim 2, wherein, The side of the fixed locking screw rod close to the grounding positioning sleeve is provided with a wire pressing bolt hole in the axial direction thereof.

4. The coal mine universal ground rod connector according to claim 3, characterized in that, The side of the coupling shaft away from the wire pressing bolt hole is provided with a first connecting through hole in the radial direction thereof for mounting a connecting bolt; the fixed locking screw rod is provided with a second connecting through hole in the radial direction thereof corresponding to the position of the first connecting through hole; The fixed locking screw rod is fixedly connected with the coupling shaft through the connecting bolt.

5. The coal mine universal ground rod connector of claim 4, wherein, The two ends of the connecting bolt are respectively fastened with the outer side wall of the coupling shaft through nuts.

6. The coal mine universal ground rod connector of claim 1, wherein, The part of the outer surface of the crimping ground wire bolt extending out of the fixing hole is sequentially sleeved from top to bottom with a spring washer and a flat washer.

7. The coal mine universal ground rod connector of claim 1, wherein, One end of the pressing spring abuts against the outer end face of the grounding positioning sleeve, and the other end abuts against the outer end face of the coupling shaft.

8. The coal mine universal ground rod connector of claim 1, wherein, The outer diameter size of the annular boss of the fixed locking screw rod is matched with the cylinder diameter size of the first cylinder cavity of the grounding positioning sleeve; the outer diameter size of the rod body of the fixed locking screw rod is matched with the cylinder diameter size of the second cylinder cavity of the grounding positioning sleeve and the cylinder cavity of the coupling shaft.

9. The coal mine universal ground rod connector of claim 8, wherein, The cylinder diameter size of the first cylinder cavity is greater than the cylinder diameter size of the second cylinder cavity.

10. The coal mine universal ground rod connector of claim 4, wherein, The hole diameter size of the first connecting through hole is the same as the hole diameter size of the second connecting through hole.

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