A CT grounding device
By introducing a limiting insulating card and an elastic clamping ring into the CT grounding device, the problem of the switch easily falling off during the operation of the diesel generator unit was solved, ensuring the stability and safety of the equipment and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ALUMINUM CORP OF CHINA LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-31
AI Technical Summary
During the operation of the diesel generator unit, the grounding wire of the head CT is not stable enough, which makes the switch prone to falling off during operation, posing a safety hazard.
A CT grounding device was designed, including a base, a knife holder, a knife switch, a clamp, a limiting fixing bolt, a limiting movable bolt, a limiting insulating card, and a transparent insulating shell. Through the combination structure of the limiting insulating card and the elastic clamping ring, the knife switch is ensured to remain in the specified position during operation to prevent it from falling.
It effectively prevents the switch from falling due to vibration or external force, improves the safety and grounding reliability of the equipment, extends the service life of the equipment, and reduces operation and maintenance costs.
Smart Images
Figure CN224582518U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a protective device, and more particularly to a CT grounding device. Background Technology
[0002] During the operation of diesel generator units, the stability of the head CT grounding wire plays a decisive role in the safety of the entire system. Under the current operating conditions (i.e., the head CT grounding wire has been brought out externally), there are many hidden dangers, the most prominent of which are the possibility of the switch falling off during operation and insufficient grounding reliability. If these problems are not addressed in a timely manner, they will pose a serious threat to the safe and stable operation of the power system. Utility Model Content
[0003] In view of the technical problems existing in the background art, the present invention aims to provide a CT grounding device, which adds a protective device to the switch to ensure that it is always kept in the specified position during operation, and will not fall even if subjected to vibration or other external forces.
[0004] To solve the above problems, the technical solution of this utility model is as follows: A CT grounding device includes a base, a knife holder, a knife switch, a clamp, a limiting fixing bolt, a limiting movable bolt, and a limiting insulating card. The knife switch and clamp are spaced apart along the front-to-back direction on the middle of the top surface of the base. The lower end of the knife switch is mounted on the knife holder via a rotating shaft and can rotate based on the shaft. The clamp is positioned corresponding to the knife switch, allowing the knife switch to rotate and engage with the clamp. Limiting fixing bolts and limiting movable bolts are respectively located on the middle of the left and right sides of the top surface of the base. One end of the limiting insulating card has a sleeve hole, through which it is fitted onto the limiting fixing bolt and can rotate relative to the limiting fixing bolt. When the knife switch and clamp are engaged, the other end of the limiting insulating card has a hook. The limiting insulating card rotates and hangs on the limiting movable bolt via the hook. By tightening the nuts on the top of the limiting fixing bolt and the limiting movable bolt, both ends of the limiting insulating card are fixed, simultaneously sealing the top surface of the knife switch.
[0005] It also includes an elastic clamping ring, wherein the clamping piece is two metal pieces arranged side by side; the elastic clamping ring is a ring with an opening, and the two ends of the opening are respectively fixedly installed in the middle of the outer wall of the two metal pieces; when the circuit is not closed, the elastic clamping ring is in a natural state, or applies a slight clamping force to the two metal pieces; when the circuit is closed, the elastic clamping ring is subjected to the outward expansion and compression of the two metal pieces, resulting in elastic deformation, and strengthens the clamping of the two metal pieces.
[0006] The elastic clamping ring is made of a copper alloy with good elasticity and electrical conductivity.
[0007] The guillotine is equipped with a handle at its top.
[0008] The handle is made of insulating material.
[0009] It also includes a transparent insulating shell, which can be fully fitted onto the base to cover the entire device; the transparent insulating shell has a knife groove in the middle corresponding to the switch and the clamp, the switch can be closed with the clamp through the knife groove, the transparent insulating shell has openings on both sides of the knife groove corresponding to the limiting fixing bolt and the limiting movable bolt, the top of the limiting fixing bolt and the limiting movable bolt protruding from the opening, and the limiting insulating card is located outside the transparent insulating shell.
[0010] The transparent insulating shell is made of polycarbonate, a high-molecular composite material.
[0011] The size of the transparent insulating shell is 1.2-1.5 times the maximum range of motion of the switch.
[0012] The beneficial effects of this utility model are as follows: The CT grounding device of this utility model forms a physical protective barrier around the switch by adding a transparent insulating shell to prevent external factors from causing accidental impact or interference to the switch, thereby reducing the risk of the switch falling. The addition of a limiting insulating card at a suitable position on the switch provides stable support and limiting constraint for the switch from a mechanical structure level, which can limit the range of motion of the switch and keep it in the specified position during operation. Even if subjected to vibration or other external forces, it will not fall, thus ensuring the safety of the equipment.
[0013] Meanwhile, an elastic clamping ring is installed at the clamping plate position. This elastic clamping ring has good clamping force and stability, which can firmly fix the clamping plate and avoid the problem of the clamping plate loosening due to long-term operation or vibration. This ensures the reliability of equipment grounding, extends the service life of the equipment, and reduces operation and maintenance costs. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 2 This is a schematic diagram of the installation of the elastic clamping ring of this utility model.
[0015] The names and numbers of the parts in the diagram are as follows: 1 is a transparent insulating shell, 2 is a knife switch, 3 is a knife groove, 4 is a sleeve hole, 5 is a clamping plate, 6 is a base, 7 is a limiting fixing bolt, 8 is a limiting movable bolt, 9 is a limiting insulating card, 10 is an elastic clamping ring, 11 is a metal sheet, 12 is a hook, 13 is a handle, and 14 is a knife holder. Detailed Implementation
[0016] The following description, in conjunction with the accompanying drawings, details the implementation methods and embodiments of this utility model and their working processes.
[0017] Referring to the accompanying drawings, a CT grounding device in this embodiment includes a base 6, a knife holder 14, a knife switch 2, a clamp 5, a limiting fixing bolt 7, a limiting movable bolt 8, and a limiting insulating card 9. The knife switch 2 and the clamp 5 are spaced apart along the front-to-back direction on the center of the top surface of the base 6. The lower end of the knife switch 2 is mounted on the knife holder 14 via a rotating shaft and can rotate based on the shaft. The clamp 5 is positioned corresponding to the knife switch 2, and the knife switch 2 can rotate to close into the clamp 5. The left and right sides of the top surface of the base 6 are respectively provided with… The circuit includes a limiting fixing bolt 7 and a limiting movable bolt 8. One end of the limiting insulating card 9 has a sleeve hole 4, through which it is fitted onto the limiting fixing bolt 7, allowing it to rotate relative to the limiting fixing bolt 7. When the switch 2 and clamp 5 are closed, the other end of the limiting insulating card 9 has a hook 12. The limiting insulating card 9 rotates and hangs on the limiting movable bolt 8 via the hook 12. By tightening the nuts on the top of the limiting fixing bolt 7 and the limiting movable bolt 8, both ends of the limiting insulating card 9 are fixed, simultaneously sealing the top surface of the switch 2. The limiting insulating card 9 provides stable support and limiting constraint for the switch from a mechanical structural perspective, restricting the range of motion of the switch and ensuring it remains in a specified position during operation, preventing it from falling even under vibration or other external forces.
[0018] It also includes an elastic clamping ring 10, wherein the clamping piece 5 consists of two side-by-side metal pieces 11; the elastic clamping ring 10 is a circular ring with an opening, the two ends of which are fixedly installed on the middle of the outer walls of the two metal pieces 11; in the non-closed state, the elastic clamping ring 10 is in a natural state, or applies a slight clamping force to the two metal pieces 11; when the circuit is closed, the elastic clamping ring 10 undergoes elastic deformation due to the outward expansion and compression of the two metal pieces 11, thereby strengthening the clamping of the two metal pieces 11. This prevents the switch 2 from loosening and slipping due to vibration during long-term operation.
[0019] The elastic clamping ring 10 is made of a copper alloy with good elasticity and electrical conductivity.
[0020] The top of the guillotine 2 is provided with a handle 13.
[0021] The handle 13 is made of insulating material.
[0022] It also includes a transparent insulating shell 1, which can be fully fitted onto the base 6 to cover the entire device; the transparent insulating shell 1 has a knife groove 3 in the middle corresponding to the switch 2 and the clamp 5, the switch 2 can close with the clamp 5 through the knife groove 3, the transparent insulating shell 1 has openings on both sides of the knife groove 3 corresponding to the limiting fixing bolt 7 and the limiting movable bolt 8, the tops of the limiting fixing bolt 7 and the limiting movable bolt 8 extend out from the openings, and the limiting insulating card 9 is located outside the transparent insulating shell 1.
[0023] The transparent insulating shell 1 is made of polycarbonate, a high-molecular composite material.
[0024] The size of the transparent insulating shell 1 is 1.4 times the maximum range of motion of the switch. The design of the transparent insulating shell 1 provides a certain amount of operating space to ensure that the switch 2 can open and close normally, while avoiding interference between the transparent insulating shell 1 and the switch 2.
[0025] The working process of this embodiment is as follows: Adjust the angle of the limiting insulating card 9 by rotating the limiting fixing bolt 7, and hang the hook 12 of the limiting insulating card 9 on the limiting movable bolt 8. Tighten the nuts on the top of the limiting fixing bolt 7 and the limiting movable bolt 8 to fix both ends of the limiting insulating card 9, and at the same time seal the top surface of the switch 2. When the switch is in the normal working position, the insulating limiting card 9 can effectively prevent the switch from being displaced or falling due to external force, eliminating the risk of the switch falling during operation from the root, and building a solid defense for the stable operation of the power system. At the same time, when the switch 2 is closed for grounding operation, the closing of the switch 2 applies force to the two metal pieces 11 of the clamp 5, causing the two sides of the metal pieces 11 to expand outward. The elastic clamping ring 10 is given an outward expansion force and undergoes elastic deformation, strengthening the clamping force on the two metal pieces 11 and preventing the clamp from loosening due to long-term operation or vibration.
Claims
1. A CT grounding device, comprising a base (6), a knife holder (14), a switch (2), a clamp (5), a limiting fixing bolt (7), a limiting movable bolt (8), and a limiting insulating card (9), characterized in that: A knife switch (2) and a clamp (5) are spaced apart along the front-back direction on the middle of the top surface of the base (6). The lower end of the knife switch (2) is mounted on the knife holder (14) through a rotating shaft and can rotate based on the rotating shaft. The clamp (5) is set corresponding to the knife switch (2) and the knife switch (2) can rotate to close the switch into the clamp (5). The base (6) has a limiting fixing bolt (7) and a limiting movable bolt (8) respectively on the middle of the left and right sides of the top surface; the limiting insulating card (9) has a sleeve hole (4) at one end, which is fitted onto the limiting fixing bolt (7) through the sleeve hole (4) and can rotate relative to the limiting fixing bolt (7); when the switch (2) and the clamp (5) are closed, the limiting insulating card (9) has a hook (12) at the other end, which rotates and hangs on the limiting movable bolt (8) through the hook (12). By tightening the nuts on the top of the limiting fixing bolt (7) and the limiting movable bolt (8), the two ends of the limiting insulating card (9) are fixed, and the top surface of the switch (2) is sealed at the same time.
2. The CT grounding device according to claim 1, characterized in that: It also includes an elastic clamping ring (10), and the clamping piece (5) is two metal pieces (11) arranged side by side; the elastic clamping ring (10) is a ring with an opening, and the two ends of the opening are respectively fixedly installed in the middle of the outer wall of the two metal pieces (11); when the circuit is not closed, the elastic clamping ring (10) is in a natural state, or applies a slight clamping force to the two metal pieces (11); when the circuit is closed, the elastic clamping ring (10) is subjected to elastic deformation by the outward expansion and compression of the two metal pieces (11), and strengthens the clamping of the two metal pieces (11).
3. The CT grounding device according to claim 2, characterized in that: The elastic clamping ring (10) is made of a copper alloy with good elasticity and electrical conductivity.
4. The CT grounding device according to claim 1, characterized in that: The top of the guillotine (2) is provided with a handle (13).
5. The CT grounding device according to claim 4, characterized in that: The handle (13) is made of insulating material.
6. The CT grounding device according to claim 1, characterized in that: It also includes a transparent insulating shell (1), which can be fully fitted onto the base (6) to cover the entire device; the transparent insulating shell (1) has a knife groove (3) in the middle corresponding to the knife switch (2) and the clamp (5), the knife switch (2) can be closed with the clamp (5) through the knife groove (3), the transparent insulating shell (1) has openings for corresponding limiting fixing bolts (7) and limiting movable bolts (8) on both sides of the knife groove (3), the tops of the limiting fixing bolts (7) and the limiting movable bolts (8) extend out from the openings, and the limiting insulating card (9) is located outside the transparent insulating shell (1).
7. The CT grounding device according to claim 6, characterized in that: The transparent insulating shell (1) is made of polycarbonate, a polymer composite material.
8. The CT grounding device according to claim 6, characterized in that: The size of the transparent insulating shell (1) is 1.2-1.5 times the maximum range of motion of the switch.