A transformer grounding device for easy connection

Abstract

The application relates to the technical field of electric conduction, and discloses a transformer grounding device convenient to connect, which comprises a first vertical block, a second vertical block arranged side by side with the first vertical block, and a clamping space formed between the first vertical block and the second vertical block; at least two clamping plates symmetrically arranged on the inner side of the clamping space to cooperate with external grounding pieces; and a first ring block fixed to the upper surface of the first vertical block. The first vertical block, the second vertical block, the first limiting piece, the second limiting piece and the clamping plate are arranged, a closed clamping space is formed, the transformer grounding device can avoid falling off from the grounding grid flat steel after clamping, the safety of the transformer grounding is improved, and when the device is used, the device can be selectively used in combination with the grounding grid to ground or different length grounding rods are arranged around the transformer to ground, so that the inconvenience of carrying multiple devices outdoors is reduced.

Description

Technical Field

[0001] This invention relates to the field of grounding and conductivity technology, and more specifically to a transformer grounding device that is easy to connect. Background Technology

[0002] In power systems, transformers are core equipment, and their reliable grounding is a crucial link in ensuring the safe operation of the equipment and the personal safety of the operators. Transformer grounding usually involves electrically connecting the transformer casing or neutral point to a grounding device buried underground through a grounding wire to discharge fault current. Currently, there are two main types of transformer grounding connection methods: one is to use a pre-buried grounding grid and connect the grounding wire to the flat steel of the grounding grid through clamps; the other is to drive a grounding rod into the ground in an outdoor environment without a grounding grid and then fix the grounding wire to the grounding rod with grounding bolts.

[0003] Existing clamps that connect to the flat steel of the grounding grid are mostly bolt clamps or C-type spring clamps. During long-term operation, these clamps are easily weakened by environmental vibrations, temperature changes and other factors. This can lead to accidental loosening of the clamp, causing it to detach from the flat steel at its opening and fall off, resulting in grounding failure and threatening equipment insulation and personnel safety. Therefore, we propose a transformer grounding device that is easy to connect. Summary of the Invention

[0004] The purpose of this invention is to provide a transformer grounding device that is easy to connect, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a transformer grounding device that is easy to connect, comprising:

[0006] A first vertical block and a second vertical block arranged side by side thereare, and a clamping space is formed between the first vertical block and the second vertical block;

[0007] At least two clamping plates are symmetrically arranged inside the clamping space to cooperate with the external grounding component;

[0008] The first ring block is fixed to the upper surface of the first upright block, and the second upright block has a second ring block that cooperates with the first ring block to form a ring. The first ring block and the second ring block are connected to each other so as to close one end of the clamping space.

[0009] At least two fixing posts are respectively set on the lower surfaces of the first and second uprights. The outer surface of the fixing posts is connected to a first limiting member to close the other end of the clamping space through the first limiting member.

[0010] Preferably, the clamping plate includes a clamping part and an elastic part. The clamping part is disposed inside a groove opened on one side wall of the first upright block, and the elastic part is integrally formed at both ends of the clamping part to be fixedly connected with the groove.

[0011] Preferably, a connecting block that mates with the first ring block is fixed on the lower surface of the second limiting member, and a limiting groove for limiting the first ring block and the second ring block is formed between the outer surface of the connecting block and the second limiting member.

[0012] Preferably, the connecting block and the first ring block are engaged by threads, interference fit, or snap fit.

[0013] Preferably, the connecting block has a through hole on its inner side, and the through hole penetrates the upper surface of the second limiting member, and the upper surface of the first upright block has a pressing surface corresponding to the connecting block.

[0014] Preferably, a grounding rod is fixed to the lower surface of the first limiting member, and the lower end of the grounding rod has a pointed tip.

[0015] Preferably, the cross-sections of the first and second blocks are both "D" shaped, and the outer diameter formed by the cooperation of the first and second blocks is the same as the outer diameter of the grounding rod.

[0016] Preferably, the lower surface edge of the second limiting member is provided with a clamping groove, and the inner wall of the clamping groove is symmetrically provided with a wire groove that penetrates its outer wall.

[0017] Preferably, the first limiting member has a connecting groove that mates with the fixed post, and the connecting groove and the fixed post are connected by threads, interference fit or snap fit.

[0018] Preferably, a second stop is fixed to one side wall of the second upright block, and a first stop is provided on one side wall of the first upright block, offset from the second stop.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] (1) By providing a first upright block, a second upright block, a first limiting member, a second limiting member and a clamping plate, this invention avoids the risk of accidental loosening when the traditional wire clamp is connected to the grounding grid. This device can form a closed clamping space, thereby preventing it from falling off the flat steel of the grounding grid after clamping, improving the safety of transformer grounding. In addition, this device is easy to connect to the transformer grounding wire, and there is no need to add another grounding bolt to fix the grounding wire. It can be connected to the grounding wire, reducing the number of parts, improving the convenience of use and reducing the cost of parts.

[0021] (2) By setting a first limiting member, a first upright block, a second upright block and a second limiting member that are fixed to the grounding rod, the traditional transformer grounding requires carrying a clamp connected to the grounding grid and grounding rods of different lengths. This device does not need to carry the two separately. When in use, this device can selectively use the grounding grid to achieve grounding according to the actual situation, or lay grounding rods of different lengths around the transformer to achieve grounding, reducing the inconvenience of carrying multiple devices outdoors and improving the multi-purpose effect of one device.

[0022] (3) By setting up connecting blocks, pressing surfaces, clamping grooves and wire grooves, the traditional grounding wire fixing is avoided by only pressing and fixing once by pressing bolts. This device can press and fix the end of the grounding wire by cooperating with the connecting blocks and pressing surfaces, and then clamp along the axial direction of the grounding wire by cooperating with the clamping groove and the first limiting piece, thereby achieving a double fixing effect on the grounding wire, reducing the accidental loosening of the grounding wire and improving the firmness of the grounding connection. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the exploded structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the clamping plate structure of the present invention;

[0026] Figure 4 This is a cross-sectional view of the first limiting member and the second limiting member of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the second limiting member of the present invention;

[0028] Figure 6 This is a schematic diagram of the first ring block structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the connection structure between the first limiting member and the grounding rod of the present invention;

[0030] Figure 8 This is a schematic diagram of the anti-detachment part structure of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of the first and second blocks of the present invention;

[0032] Figure 10 This is a schematic diagram of the snap-fit ​​structure of the present invention;

[0033] Figure 11 This is a diagram illustrating the connection between the device of the present invention and the grounding grid.

[0034] Figure 12This is a diagram illustrating the effect of assembling grounding rods of different lengths according to the present invention;

[0035] Figure 13 This is a diagram illustrating the first installation state of the grounding wire according to the present invention.

[0036] Figure 14 This is a diagram illustrating the second installation state of the grounding wire according to the present invention.

[0037] In the diagram: 1. First upright block; 101. Groove; 102. Pressing surface; 2. Second upright block; 3. First limiting member; 31. Connecting groove; 4. Second limiting member; 41. Connecting block; 42. Limiting groove; 43. Clamping groove; 44. Through hole; 45. Wire groove; 5. Clamping plate; 51. Clamping part; 52. Elastic part; 6. Fixing post; 7. First ring block; 8. Guide groove; 91. First stop block; 92. Second stop block; 10. Grounding rod; 111. Inclined part; 112. Horizontal part. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figures 1-14 The present invention provides a technical solution: a transformer grounding device that is easy to connect, comprising:

[0040] A first vertical block 1 and a second vertical block 2 arranged side by side thereare formed, and a clamping space is formed between the first vertical block 1 and the second vertical block 2, such as Figure 1 As shown, in this device, the first block 1 and the second block 2 are exactly the same in shape and size, which makes it easy for them to be used interchangeably. Therefore, there is no need to distinguish between the two when using them, which improves the convenience of use and reduces the cost of manufacturing them separately.

[0041] like Figure 2 As shown, at least two clamping plates 5 are symmetrically arranged inside the clamping space to cooperate with the external grounding component;

[0042] The external grounding component is the grounding grid that already exists on the ground around the transformer. In this case, it can be clamped onto the flat steel of the grounding grid by two clamps 5 to achieve rapid grounding.

[0043] The first ring block 7 is fixed to the upper surface of the first upright block 1, and the second upright block 2 has a second ring block that cooperates with the first ring block 7 to form a ring. The first ring block 7 and the second ring block are connected to each other so as to close one end of the clamping space.

[0044] The second limiting member 4 can also cooperate with the first upright block 1 to clamp and fix the end of the grounding wire, reducing the additional grounding bolts for fixing the grounding wire.

[0045] As Figure 11 shown, in use, the first upright block 1 and the second upright block 2 are respectively arranged on the upper and lower sides of the grounding grid flat steel. The clamping plate 5 abuts against the flat steel for conduction. Then, through the cooperation of the first limiting member 3 and the two fixing columns 6, one end of the grounding wire is connected to the transformer, and the other end of the grounding wire is placed on the pressing surface 102. The second limiting member 4 is made to cooperate with the first ring block 7 so as to press and fix the other end of the grounding wire by the end of the second limiting member 4 abutting against the pressing surface 102, thereby completing the grounding connection of the transformer.

[0046] As Figure 2 shown, at least two fixing columns 6 are respectively arranged on the lower surfaces of the first upright block 1 and the second upright block 2. The outer surface of the fixing column 6 is connected with the first limiting member 3 to enclose the other end of the clamping space through the first limiting member 3.

[0047] As Figure 1 and Figure 2 shown, by arranging the first upright block 1, the second upright block 2, the first limiting member 3 and the second limiting member 4, a closed "mouth" - shaped clamping space is formed by enclosing the four of them. When cooperating with the grounding grid flat steel which also has a closed frame - type structure, a double - closed - loop connection can be formed, effectively preventing the grounding grid flat steel from accidentally slipping out of the clamping space, and significantly improving the connection reliability and safety of the transformer grounding.

[0048] Preferably, the clamping plate 5 includes a clamping portion 51 and an elastic portion 52. The clamping portion 51 is arranged inside the groove 101 opened on one side wall of the first upright block 1, and the elastic portion 52 is integrally formed at both ends of the clamping portion 51 to be fixedly connected with the groove 101.

[0049] As Figure 3 shown, the elastic portion 52 is wavy, which is convenient for elastic deformation. On the one hand, it can make the flat clamping portion 51 achieve close surface contact with the surface of the grounding grid flat steel, increasing the conduction area and reducing the contact resistance. On the other hand, through the elastic clamping force, it can adaptively cooperate with flat steels of different thicknesses, enhancing the universality of the device for grounding grids of different specifications. At the same time, the elastic force can continuously provide clamping compensation, effectively delaying the attenuation of the clamping force caused by vibration or material creep.

[0050] Preferably, a connecting block 41 for cooperating with the first ring block 7 is fixed on the lower surface of the second limiting member 4. A limiting groove 42 for limiting the first ring block 7 and the second ring block is formed between the outer surface of the connecting block 41 and the second limiting member 4.

[0051] As Figure 4As shown, the limiting groove 42 can slide up and down along the outer wall of the first ring block 7 and the second ring block. At the same time, the limiting groove 42 provides radial constraint to the first ring block 7 and the second ring block, preventing them from misaligning or separating after being subjected to force. This allows the connecting block 41 to be inserted between the first ring block 7 and the second ring block to achieve connection and fixation. Furthermore, the lower surface edge of the first upright block 1 protrudes downward to form a guide groove 8 between it and the fixing post 6. The inner and outer diameters of the guide groove 8 and the limiting groove 42 are the same, so that the guide groove 8 can guide and radially constrain the first ring block 7 when it is engaged with it, or guide and radially constrain the end of the connecting groove 31 when it is engaged with it.

[0052] Preferably, the connecting block 41 and the first ring block 7 are engaged by threads, interference fit or snap fit. The second ring block is the same size and shape as the first ring block 7, providing users with a variety of connection options. The most suitable connection form can be flexibly selected according to the actual working conditions, which not only ensures the firmness of the connection, but also improves the convenience of assembly.

[0053] like Figure 2 , Figure 4 and Figure 5 As shown, when the connection is threaded, the outer surface of the connecting block 41 has an external thread, and the inner surfaces of the first ring block 7 and the second ring block have internal threads that mate with the external thread, thereby achieving a threaded connection.

[0054] When it is an interference fit, the outer diameter of the connecting block 41 is larger than the inner diameter of the ring formed by the first ring block 7 and the second ring block, so that the connecting block 41 is pressed between the first ring block 7 and the second ring block by a large frictional force.

[0055] When assembling the card, such as Figure 10 As shown, the connecting block 41 has a locking block 13 on its side wall, and the inner walls of the first ring block 7 and the second ring block are provided with corresponding locking grooves. The connecting block 41 is connected to the first ring block 7 and the second ring block by the locking block 13 cooperating with the locking groove. Furthermore, the connection and fixation of the connecting block 41 and the first ring block 7 can also be achieved by welding.

[0056] Preferably, the inner side of the connecting block 41 has a through hole 44, and the through hole 44 penetrates the upper surface of the second limiting member 4. The upper surface of the first upright block 1 has a pressing surface 102 corresponding to the connecting block 41. The through hole 44 facilitates the grounding wire to pass through the lower surface of the connecting block 41 upwards. At the same time, the pressing surface 102 provides a flat force-bearing surface, ensuring the uniform distribution of the pressing force on the end of the grounding wire, eliminating the installation steps of the traditional grounding bolt, and realizing the quick and firm pressing of the end of the grounding wire.

[0057] like Figure 5 and Figure 6As shown, in use, one end of the grounding wire is passed through the inside of the through hole 44 to contact the pressing surface 102. Then, the connecting block 41 is pressed into the inner side of the ring formed by the first ring block 7 and the second ring block. The connecting block 41 and the pressing surface 102 abut against each other to press and fix one end of the grounding wire, thereby avoiding the inconvenience of needing to add a grounding bolt to fix the end of the grounding wire.

[0058] Preferably, such as Figure 7 As shown, a grounding rod 10 is fixed to the lower surface of the first limiting member 3, and the lower end of the grounding rod 10 has a pointed tip;

[0059] In existing systems, before grounding an outdoor transformer, users are unsure whether a grounding grid has been set up around the transformer. If a grounding grid exists, users can directly connect the transformer to the flat steel of the grounding grid using clamps at both ends of the grounding wire. If there is no grounding grid, users need to insert a grounding rod deep into the soil and then connect the grounding rod to the transformer using fixing bolts and grounding wires to achieve grounding. This means that users generally need to carry multiple grounding clamps and grounding rods of different lengths when grounding outdoor transformers. However, in this invention, it is not necessary to carry clamps and grounding rods of different lengths.

[0060] When there is a grounding grid around the transformer, the two clamps 5 of this device can be directly connected to the flat steel of the grounding grid for grounding;

[0061] When there is no grounding grid around the transformer, the grounding rod 10 is inserted deep into the soil by hammering or vibration. Then, according to the required length of the grounding rod 10, the first upright block 1 and the second upright block 2 are installed onto the first limiting member 3 of the grounding rod 10. By installing another first upright block 1 and the second upright block 2 onto the first upright block 1 and the second upright block 2, two layers are formed, and the enclosed space of the upper layer is staggered from the enclosed space of the lower layer. Figure 12 As shown, multiple layers can be assembled sequentially to form the required grounding rod length. The second limiting member 4 is connected to the top layer of the grounding rod to secure the grounding wire. Figure 13 As shown, when it is not necessary to assemble a large length, the second limiting member 4 can be directly engaged with the first limiting member 3 to directly press the grounding wire and the top of the grounding rod 10. One end of the grounding wire is connected to the transformer to achieve grounding of the transformer.

[0062] Preferably, the cross-sections of the first block 1 and the second block 2 are both "D" shaped, and the outer diameter formed by the cooperation of the first block 1 and the second block 2 is the same as the outer diameter of the grounding rod 10;

[0063] In the later stages, the first vertical block 1 and the second vertical block 2 can be matched to arrange them along the axial direction of the grounding rod 10, so that grounding rods of different lengths can be formed when the grounding rod 10 is installed outdoors.

[0064] Preferably, an inclined portion 111 is fixed to the lower end of the side wall of the grounding rod 10, and a horizontal portion 112 is integrally formed on the inclined portion 111;

[0065] like Figure 7 As shown, the inclined part 111 in this device is triangular. When the grounding rod 10 is tilted to the left or right during installation, the inclined part 111 has a certain surface area on both sides. The large surface area in contact with the soil generates a certain resistance, which will suppress the left and right tilting of the grounding rod 10 and play a guiding and correcting role, so that the grounding rod can be better inserted vertically. The inclined part 111 is evenly distributed in at least two places along the circumference of the grounding rod 10, and the included angle α formed between one side of the inclined part 111 and the grounding rod 10 is less than 60 degrees, which makes it easier to insert it into the soil deeper during installation. If the angle α is too large, it will affect the resistance to insertion into the soil. The upper surface of the horizontal part 112 is a plane, and the plane has a large contact area with the soil. When the grounding rod 10 is accidentally pulled upwards from the outside, it can suppress the accidental pull-out of the grounding rod 10.

[0066] Preferably, the lower surface edge of the second limiting member 4 is provided with a clamping groove 43, and the inner wall of the clamping groove 43 is symmetrically provided with a wire groove 45 that penetrates its outer wall;

[0067] like Figure 5 As shown, the clamping groove 43 is engaged with the step formed by the top of the first upright block 1 and the first ring block 7 to achieve clamping and fixing along the axial direction of the grounding wire. The grounding wire is inserted into the clamping groove 43 and exited from the other groove 45 through the wire groove 45.

[0068] When using, such as Figure 14 As shown, one end of the grounding wire passes through the inner side of the wire groove 45 into the clamping groove 43, and then out through another wire groove 45, passing through the through hole 44 to contact the pressing surface 102. When the connecting block 41 is pushed into the inner side of the ring formed by the first ring block 7 and the second ring block, one end of the grounding wire is pressed and fixed by the connecting block 41 and the pressing surface 102. The outer surface along the axial direction of the grounding wire is pressed and fixed inside the clamping groove 43, forming a dual fixing effect of pressing the end of the grounding wire and clamping it axially, which effectively enhances the grounding wire's resistance to loosening under vibration and external force pulling environment.

[0069] Preferably, the first limiting member 3 is provided with a connecting groove 31 that mates with the fixed post 6, and the connecting groove 31 and the fixed post 6 are connected by threads, interference fit or snap fit;

[0070] like Figure 2 and Figure 4As shown, the cooperation method between the connecting groove 31 and the fixing post 6 is the same as the cooperation method between the connecting block 41 and the first ring block 7. That is, the ring formed by the first ring block 7 and the second ring block is the same as the ring of the connecting groove 31. By setting at least two fixing posts 6 and fixing one on the lower surface of the first upright block 1 and the second upright block 2, and cooperating with the connecting groove 31 opened on the first limiting member 3, the two fixing posts 6 can be connected with the connecting groove 31 at the same time, ensuring that the lower ends of the first upright block 1 and the second upright block 2 are locked synchronously, preventing the lower end of the clamping space from having a single-sided opening. At the same time, the connecting groove 31 and the fixing post 6 can be selected to be threaded, interference fit or snap fit, which is convenient for assembly and the connection is stable. This allows multiple devices to be stacked vertically and the total length of the grounding rod 10 to be flexibly adjusted to meet the grounding resistance requirements under different geological conditions.

[0071] Preferably, a second stop 92 is fixed to one side wall of the second upright block 2, and a first stop 91 is provided on one side wall of the first upright block 1, which is offset from the second stop 92;

[0072] like Figure 9 As shown, the movement of the grounding grid flat steel along the long side of the clamping plate 5 can be restricted by the first stop 91 and the second stop 92. The flat steel can be bidirectionally limited along the length direction of the clamping plate 5, effectively preventing the flat steel from moving along the axial direction of the first upright 1 in the clamping space, and ensuring continuous and effective contact between the flat steel and the clamping plate 5. Furthermore, the side wall of the first upright 1 is provided with a sliding groove corresponding to the second stop 92, which can extend one end of the second stop 92 to the inside of the sliding groove, thereby better ensuring that the ends of the first upright 1 and the second upright 2 are stably aligned during assembly.

[0073] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transformer grounding device that is easy to connect, characterized in that, include: A first vertical block (1) and a second vertical block (2) arranged side by side therewith, and a clamping space is formed between the first vertical block (1) and the second vertical block (2); At least two clamping plates (5) are symmetrically arranged inside the clamping space to cooperate with the external grounding component; The first ring block (7) is fixed on the upper surface of the first upright block (1), and the second upright block (2) has a second ring block that cooperates with the first ring block (7) to form a ring. The first ring block (7) and the second ring block have a second limiting member (4) that connects the two to close one end of the clamping space. At least two fixing posts (6) are respectively set on the lower surfaces of the first upright block (1) and the second upright block (2). The outer surface of the fixing post (6) is connected to a first limiting member (3) so as to close the other end of the clamping space through the first limiting member (3).

2. The transformer grounding device for easy connection according to claim 1, characterized in that: The clamping plate (5) includes a clamping part (51) and an elastic part (52). The clamping part (51) is disposed inside the groove (101) opened on one side wall of the first upright block (1). The elastic part (52) is integrally formed on both ends of the clamping part (51) to be fixedly connected with the groove (101).

3. The transformer grounding device for easy connection according to claim 1, characterized in that: The lower surface of the second limiting member (4) is fixed with a connecting block (41) that cooperates with the first ring block (7). A limiting groove (42) for limiting the first ring block (7) and the second ring block is formed between the outer surface of the connecting block (41) and the second limiting member (4).

4. A transformer grounding device for easy connection according to claim 3, characterized in that: The connecting block (41) and the first ring block (7) are engaged by threads, interference fit or snap fit.

5. A transformer grounding device for easy connection according to claim 3, characterized in that: The connecting block (41) has a through hole (44) on its inner side, and the through hole (44) penetrates the upper surface of the second limiting member (4). The upper surface of the first upright block (1) has a pressing surface (102) corresponding to the connecting block (41).

6. A transformer grounding device for easy connection according to claim 1, characterized in that: A grounding rod (10) is fixed on the lower surface of the first limiting member (3), and the lower end of the grounding rod (10) has a pointed tip.

7. A transformer grounding device for easy connection according to claim 6, characterized in that: The cross-sections of the first block (1) and the second block (2) are both "D" shaped, and the outer diameter formed by the first block (1) and the second block (2) is the same as the outer diameter of the grounding rod (10).

8. A transformer grounding device for easy connection according to claim 1, characterized in that: The second limiting member (4) has a clamping groove (43) on the lower surface edge, and the inner wall of the clamping groove (43) is symmetrically provided with a wire groove (45) that penetrates its outer wall.

9. A transformer grounding device for easy connection according to claim 1, characterized in that: The first limiting member (3) has a connecting groove (31) that mates with the fixed post (6). The connecting groove (31) and the fixed post (6) are connected by threads, interference fit or snap fit.

10. A transformer grounding device for easy connection according to claim 1, characterized in that: A second stop (92) is fixed on one side wall of the second upright block (2), and a first stop (91) is provided on one side wall of the first upright block (1) at a offset from the second stop (92).

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