Current transformer with damping effect

Abstract

The utility model relates to the technical field of current transformers, and discloses a current transformer with a shock absorption function, which comprises a current transformer main body, a base is fixedly arranged at the bottom end of the current transformer main body, a bidirectional ball screw is rotatably arranged in the base, a ratchet wheel is fixedly arranged at one end of the bidirectional ball screw, and the ratchet wheel is fixedly arranged at the other end of the bidirectional ball screw. An anti-skid rotary knob is fixedly arranged at one end of the ratchet wheel, a one-way locking assembly for conducting one-way self-locking on the ratchet wheel is arranged on one side of the base, and the two sides of the bottom end of the base are each connected with two guide columns in a sliding mode; the two-way ball screw is rotated through the anti-skid rotary knob, the two-way ball screw can drive the two limiting assemblies to move in the opposite directions, and then the two limiting assemblies can be clamped with the guide column, so that the base and the guide column can be limited, bolt-free installation of the base is achieved, installation and disassembly of the base are convenient, the guide column can limit the damping rubber pad, and the damping rubber pad is convenient to assemble and disassemble. And the damping rubber pad can provide support between the positioning plate and the base.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, specifically a current transformer with shock absorption function. Background Technology

[0002] A current transformer is an instrument that measures current by converting a large primary current into a small secondary current based on the principle of electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series with the circuit whose current needs to be measured; therefore, it often carries the entire current of the circuit. The secondary winding has more turns and is connected in series with the measuring instrument and protection circuit. Vibration reduction measures must be considered when installing a current transformer. Vibrations generated by equipment such as transformers and switchgear can easily be transmitted to the transformer, causing internal core misalignment and winding loosening, affecting measurement accuracy and even damaging the equipment. If installed on an unstable base, internal components of the transformer may loosen, further affecting its measurement accuracy and stability.

[0003] The application number "202022694575.1" discloses "a current monitoring device for a hydraulic station motor," which "includes a current transformer, a shock-absorbing base is provided at the bottom of the current transformer, and a mounting base is provided at the bottom of the shock-absorbing base. This utility model, by installing a current transformer on the motor and passing the current wire through the hole in the middle of the current transformer and winding it, can effectively monitor the current passing through the motor, thereby ensuring that the motor works in a stable environment, thus improving the service life of the motor. Furthermore, the setting of the shock-absorbing base at the bottom of the current transformer makes its installation more stable and avoids the impact of vibration caused by motor operation on the current transformer."

[0004] However, the above method still has the following drawbacks: the rubber pad can absorb kinetic energy and ensure the stability of the current transformer, but it needs to be fixed by the mounting rod and nut. In a vibrating environment, the mounting base can easily transmit the vibration to the nut through the mounting rod, which can easily cause the nut and rubber pad to loosen, resulting in a decrease in stability. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides a current transformer with shock absorption function, which has the advantages of not being easy to loosen and having good stability, thus solving the problems mentioned in the background art.

[0006] This utility model provides the following technical solution: a current transformer with shock absorption function, comprising a current transformer body, a base fixedly provided at the bottom end of the current transformer body, a bidirectional ball screw rotatably provided inside the base, a ratchet fixedly provided at one end of the bidirectional ball screw, an anti-slip knob fixedly provided at one end of the ratchet, a one-way locking component for one-way self-locking of the ratchet provided on one side of the base, two guide posts slidably connected on both sides of the bottom end of the base, a limiting component for limiting the movement between the base and the guide posts on both sides of the bidirectional ball screw, a damping rubber pad sleeved on the surface of the guide posts, and a positioning plate fixedly connected to the bottom end of the guide posts.

[0007] As a preferred embodiment of this utility model, the one-way locking assembly includes a support shaft, one end of which is fixedly provided with a pawl, which is engaged with a ratchet. A connecting shaft, which is fixedly connected to a bidirectional ball screw, is fixedly provided in the middle of one side of the ratchet. A lever is fixedly provided on one side of the pawl. A torsion spring is sleeved on the surface of the support shaft. One end of the torsion spring is engaged with the pawl, and the other end of the torsion spring is engaged with a stop bar. One side of the stop bar is fixedly connected to one side of the base, and the other end of the support shaft is rotatably connected to one side of the base.

[0008] As a preferred technical solution of this utility model, a support is fixedly provided at the middle of the bottom end of the current transformer body, the bottom end of the support is fixedly connected to the middle of the top end of the base, the front and back of the base are provided with slots, and the front and back of the base are connected with cover plates by the slots, and two slide rails are provided on both sides of the bottom end of the base, and the guide post is slidably connected to the inside of the slide rail.

[0009] As a preferred embodiment of this utility model, a first baffle is fixedly provided on both sides of the bottom end of the base, the top of the damping rubber pad is engaged with the inside of the first baffle, the four corners of the positioning plate are provided with mounting holes for installation, a second baffle is fixedly provided on both sides of the top end of the positioning plate, the bottom of the damping rubber pad is engaged with the inside of the second baffle, two column grooves are provided on the surface of the damping rubber pad, the guide post is engaged with the column groove, and the surface of the damping rubber pad is coated with an anti-aging agent.

[0010] As a preferred technical solution of this utility model, the limiting component includes a slide table, a lead screw nut is fixedly provided in the middle of the slide table, the lead screw nut is threadedly connected to a bidirectional ball screw, two wedge blocks are fixedly provided on one side of the slide table, a wedge groove is provided on the top of the guide post, the wedge groove and the wedge block are located on the same straight line, and the wedge block is engaged with the inside of the wedge groove.

[0011] As a preferred technical solution of this utility model, a sliding groove is provided in the middle of the bottom end of the slide table, and a guide rail is fixedly provided on the inner wall of the middle of the bottom end of the base. The bottom end of the slide table is slidably connected to the guide rail through the sliding groove.

[0012] As a preferred embodiment of this utility model, two reinforcing rods are fixedly provided inside the base. A mounting plate one is fixedly provided at the bottom end of the reinforcing rod. The bottom end of the mounting plate one is fixedly connected to the inner wall of the bottom end of the base by screws. A mounting plate two is fixedly provided at the top end of the reinforcing rod. The top end of the mounting plate two is fixedly connected to the inner wall of the top end of the base by screws.

[0013] As a preferred technical solution of this utility model, both the surface of the first mounting plate and the surface of the second mounting plate are provided with through holes for screw insertion and connection, the inner wall of the bottom end and the inner wall of the top end of the base are provided with threaded grooves for screw thread connection, and the surface of the screw is fitted with a spring washer.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By rotating the bidirectional ball screw through the anti-slip knob, the bidirectional ball screw can drive two limiting components to move in opposite directions, which can make them engage with the guide post, thereby limiting the distance between the base and the guide post. This achieves boltless installation of the base, making it easy to install and disassemble. The guide post can limit the damping rubber pad, which can provide support between the positioning plate and the base and prevent the base from tilting. In a vibration environment, the damping rubber pad can absorb kinetic energy, thus providing buffering and shock absorption for the base and the current transformer body.

[0016] 2. The one-way locking component ensures the one-way rotation of the anti-slip knob and the bidirectional ball screw. After the base and guide post are connected, the one-way locking component can prevent the anti-slip knob and the bidirectional ball screw from rotating in the opposite direction in a vibration environment, ensuring stability and reliability. Attached Figure Description

[0017] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0018] Figure 2 This is the second structural schematic diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the base of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the bidirectional ball screw of this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the one-way locking component of this utility model;

[0023] Figure 7 This is a schematic diagram of the limiting component of this utility model;

[0024] Figure 8 This is a schematic diagram of the structure of the reinforcing rod of this utility model.

[0025] In the diagram: 1. Current transformer body; 2. Support; 3. Base; 4. Bidirectional ball screw; 5. Connecting shaft; 6. Ratchet; 7. Anti-slip knob; 8. One-way locking assembly; 801. Support shaft; 802. Pawl; 803. Lever; 804. Torsion spring; 805. Stop bar; 9. Damping rubber pad; 10. Positioning plate; 11. Stop frame one; 12. Stop frame two; 13. Guide post; 14. Post groove; 15. Limiting assembly; 1501. Slide table; 1502. Screw nut; 1503. Wedge block; 1504. Slide groove; 16. Guide rail; 17. Slide track; 18. Slot; 19. Cover; 20. Wedge groove; 21. Reinforcing rod; 22. Mounting plate one; 23. Mounting plate two; 24. Spring washer; 25. Through hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-8A current transformer with shock absorption function includes a current transformer body 1, a base 3 fixedly mounted at the bottom of the current transformer body 1, a bidirectional ball screw 4 rotatably mounted inside the base 3, a ratchet 6 fixedly mounted at one end of the bidirectional ball screw 4, an anti-slip knob 7 fixedly mounted at one end of the ratchet 6, a one-way locking component 8 for one-way self-locking of the ratchet 6 on one side of the base 3, two guide posts 13 slidably connected on both sides of the bottom end of the base 3, a limiting component 15 for limiting the movement between the base 3 and the guide posts 13 on both sides of the bidirectional ball screw 4, a damping rubber pad 9 sleeved on the surface of the guide post 13, and a fixed bottom end of the guide post 13. The positioning plate 10 is connected. By rotating the bidirectional ball screw 4 through the anti-slip knob 7, the bidirectional ball screw 4 can drive the two limiting components 15 to move in opposite directions, so that they can be engaged with the guide post 13, thereby limiting the distance between the base 3 and the guide post 13. This enables boltless installation of the base 3, which is convenient for installation and disassembly. The damping rubber pad 9 can provide support between the positioning plate 10 and the base 3. The guide post 13 can limit the damping rubber pad 9 and prevent the base 3 from tilting. In a vibration environment, the damping rubber pad 9 can absorb kinetic energy, thereby providing buffering and shock absorption for the base 3 and the current transformer body 1.

[0028] In this embodiment, preferably, the one-way locking assembly 8 includes a support shaft 801, one end of which is fixedly provided with a pawl 802, which engages with a ratchet 6. A connecting shaft 5, which is fixedly connected to a bidirectional ball screw 4, is fixedly provided in the middle of one side of the ratchet 6. A lever 803 is fixedly provided on one side of the pawl 802. A torsion spring 804 is sleeved on the surface of the support shaft 801, one end of the torsion spring 804 engaging with the pawl 802, and the other end of the torsion spring 804 engaging with a... The stop bar 805 is fixedly connected to one side of the base 3, and the other end of the support shaft 801 is rotatably connected to one side of the base 3. During the rotation of the anti-slip knob 7, the ratchet 6 can rotate through the pawl 802. After the anti-slip knob 7 is rotated, the pawl 802 can lock the ratchet 6, which can prevent the bidirectional ball screw 4 and the anti-slip knob 7 from rotating in opposite directions. By using the lever 803 to move the pawl 802 and separate it from the ratchet 6, the anti-slip knob 7 can be rotated in the opposite direction.

[0029] In this embodiment, preferably, the limiting component 15 includes a slide 1501, a lead screw nut 1502 fixedly disposed in the middle of the slide 1501, the lead screw nut 1502 being threadedly connected to the bidirectional ball screw 4, two wedge blocks 1503 fixedly disposed on one side of the slide 1501, a wedge groove 20 being formed at the top of the guide post 13, the wedge groove 20 and the wedge blocks 1503 being located on the same straight line, the wedge blocks 1503 being engaged with the inside of the wedge groove 20, a sliding groove 1504 being formed in the middle of the bottom end of the slide 1501, and the inner wall of the middle of the bottom end of the base 3 being fixed. A guide rail 16 is fixedly provided. The bottom end of the slide table 1501 is slidably connected to the guide rail 16 through the slide groove 1504. The rotational motion of the bidirectional ball screw 4 can be converted into the linear motion of the slide table 1501 through the screw nut 1502. The guide rail 16 and the slide groove 1504 can guide the slide table 1501 and prevent it from tilting. When the slide table 1501 moves, the wedge block 1503 can enter the wedge groove 20 at the top of the guide post 13. By relying on its contact slope, it can shorten the distance between the base 3 and the positioning plate 10, and thus clamp the damping rubber pad 9.

[0030] In this embodiment, preferably, a support 2 is fixedly provided at the middle of the bottom end of the current transformer body 1, and the bottom end of the support 2 is fixedly connected to the middle of the top end of the base 3. The front and back of the base 3 are provided with slots 18, and cover 19 is engaged with the front and back of the base 3 through the slots 18. Two slide rails 17 are provided on both sides of the bottom end of the base 3, and the guide post 13 is slidably connected to the inside of the slide rails 17. A retaining frame 11 is fixedly provided on both sides of the bottom end of the base 3, and the top of the damping rubber pad 9 is engaged with the inside of the retaining frame 11. The four corners of the positioning plate 10 are provided with mounting brackets for installation. The mounting holes are installed, and baffle frames 12 are fixed on both sides of the top of the positioning plate 10. The bottom of the damping rubber pad 9 is engaged with the inside of the baffle frame 12. Two grooves 14 are opened on the surface of the damping rubber pad 9. The guide post 13 is engaged with the groove 14. The surface of the damping rubber pad 9 is coated with an anti-aging agent. The sliding connection between the base 3 and the guide post 13 can be ensured through the slide 17. The guide post 13 can limit the position of the damping rubber pad 9 through the groove 14. The baffle frame 11 and the baffle frame 12 can limit the bottom and top of the damping rubber pad 9 respectively, which improves the stability of the damping rubber pad 9.

[0031] In this embodiment, preferably, two reinforcing rods 21 are fixedly provided inside the base 3. A mounting plate 22 is fixedly provided at the bottom end of the reinforcing rod 21. The bottom end of the mounting plate 22 is fixedly connected to the inner wall of the bottom end of the base 3 by screws. A mounting plate 23 is fixedly provided at the top end of the reinforcing rod 21. The top end of the mounting plate 23 is fixedly connected to the inner wall of the top end of the base 3 by screws. Through holes 25 for screw insertion are opened on the surface of the mounting plate 22 and the surface of the mounting plate 23. Threaded grooves for screw thread connection are opened on the inner wall of the bottom end and the inner wall of the top end of the base 3. Spring washers 24 are fitted on the surface of the screws. The screws can fix the mounting plate 22 and the mounting plate 23. The setting of the spring washers can improve the firmness of the screws. The mounting plate 22 and the mounting plate 23 can limit the position of the reinforcing rod 21. The reinforcing rod 21 can provide stable support for the interior of the base 3, thereby improving the strength and deformation resistance of the base 3.

[0032] When in use, the staff first fixes the positioning plate 10 through the positioning hole. When the current transformer body 1 needs to be installed, the damping rubber pad 9 is put on the guide post 13 through the column groove 14. The first baffle 11 can limit the bottom of the damping rubber pad 9. Then, the bottom of the base 3 is put on the guide post 13 through the slide 17. The second baffle 12 can limit the top of the damping rubber pad 9.

[0033] After the base 3 is connected to the guide post 13, the bidirectional ball screw 4 is rotated by the anti-slip knob 7. The screw nut 1502 of the limit component 15 can convert the rotational motion of the bidirectional ball screw 4 into the linear motion of the slide table 1501. The guide rail 16 and the slide groove 1504 can guide the slide table 1501 and prevent it from tilting. When the slide table 1501 moves, the wedge block 1503 can enter the wedge groove 20 at the top of the guide post 13. By relying on its contact slope, the distance between the base 3 and the positioning plate 10 can be shortened, and the damping rubber pad 9 can be clamped, thus realizing the boltless installation of the base 3.

[0034] During the rotation of the anti-slip knob 7, the ratchet 6 of the one-way locking component 8 can rotate through the pawl 802. After the anti-slip knob 7 is rotated, the pawl 802 can lock the ratchet 6, which can prevent the bidirectional ball screw 4 and the anti-slip knob 7 from rotating in opposite directions. The guide post 13 can limit the position of the damping rubber pad 9. The damping rubber pad 9 can provide support between the positioning plate 10 and the base 3, and can prevent the base 3 from tilting. In a vibration environment, the damping rubber pad 9 can absorb kinetic energy, which can provide buffering and shock absorption for the base 3 and the current transformer body 1.

[0035] When it is necessary to disassemble the main body 1 of the current transformer, the pawl 802 is moved by the lever 803 to separate it from the ratchet 6. Then the bidirectional ball screw 4 can be rotated by the anti-slip knob 7. The bidirectional ball screw 4 can make the two limit components 15 move in opposite directions. The wedge block 1503 of the limit component 15 can be separated from the guide post 13, and the base 3 can be quickly removed.

[0036] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A current transformer with shock absorption function, comprising a current transformer body (1), characterized in that: The bottom end of the current transformer body (1) is fixedly provided with a base (3). The base (3) is rotatably provided with a bidirectional ball screw (4). One end of the bidirectional ball screw (4) is fixedly provided with a ratchet (6). One end of the ratchet (6) is fixedly provided with an anti-slip knob (7). One side of the base (3) is provided with a one-way locking component (8) for one-way self-locking of the ratchet (6). Two guide posts (13) are slidably connected to both sides of the bottom end of the base (3). Limiting components (15) are provided on both sides of the bidirectional ball screw (4). The surface of the guide post (13) is covered with a damping rubber pad (9). The bottom end of the guide post (13) is fixedly connected with a positioning plate (10).

2. The current transformer with shock absorption function according to claim 1, characterized in that: The one-way locking assembly (8) includes a support shaft (801), one end of which is fixedly provided with a pawl (802), which is engaged with a ratchet (6), and a connecting shaft (5) fixedly provided in the middle of one side of the ratchet (6) and fixedly connected with a bidirectional ball screw (4). A lever (803) is fixedly provided on one side of the pawl (802), and a torsion spring (804) is sleeved on the surface of the support shaft (801). One end of the torsion spring (804) is engaged with the pawl (802), and the other end of the torsion spring (804) is engaged with a stop bar (805). One side of the stop bar (805) is fixedly connected to one side of the base (3), and the other end of the support shaft (801) is rotatably connected to one side of the base (3).

3. The current transformer with shock absorption function according to claim 1, characterized in that: A support (2) is fixedly provided at the middle of the bottom end of the current transformer body (1). The bottom end of the support (2) is fixedly connected to the middle of the top end of the base (3). The front and back of the base (3) are provided with slots (18). The front and back of the base (3) are connected with covers (19). Two slides (17) are provided on both sides of the bottom end of the base (3). The guide post (13) is slidably connected to the inside of the slide (17).

4. The current transformer with shock absorption function according to claim 1, characterized in that: The base (3) has a first baffle (11) fixed on both sides of its bottom end. The top of the damping rubber pad (9) is engaged with the inside of the first baffle (11). The four corners of the positioning plate (10) are provided with mounting holes. The top two sides of the positioning plate (10) are fixed with a second baffle (12). The bottom of the damping rubber pad (9) is engaged with the inside of the second baffle (12). The surface of the damping rubber pad (9) has two column grooves (14). The guide post (13) is engaged with the column grooves (14).

5. The current transformer with shock absorption function according to claim 1, characterized in that: The limiting component (15) includes a slide (1501), a lead screw nut (1502) is fixedly provided in the middle of the slide (1501), the lead screw nut (1502) is threadedly connected to a bidirectional ball screw (4), two wedge blocks (1503) are fixedly provided on one side of the slide (1501), and a wedge groove (20) is provided on the top of the guide post (13). The wedge groove (20) and the wedge block (1503) are located on the same straight line, and the wedge block (1503) is engaged with the inside of the wedge groove (20).

6. The current transformer with shock absorption function according to claim 5, characterized in that: The slide table (1501) has a groove (1504) in the middle of its bottom end, and a guide rail (16) is fixedly provided on the inner wall of the middle of the bottom end of the base (3). The bottom end of the slide table (1501) is slidably connected to the guide rail (16) through the groove (1504).

7. The current transformer with shock absorption function according to claim 1, characterized in that: The base (3) is fixedly provided with two reinforcing rods (21). The bottom end of the reinforcing rod (21) is fixedly provided with a mounting plate one (22). The bottom end of the mounting plate one (22) is fixedly connected to the inner wall of the bottom end of the base (3) by screws. The top end of the reinforcing rod (21) is fixedly provided with a mounting plate two (23). The top end of the mounting plate two (23) is fixedly connected to the inner wall of the top end of the base (3) by screws.

8. The current transformer with shock absorption function according to claim 7, characterized in that: The surfaces of mounting plate one (22) and mounting plate two (23) are provided with through holes (25) for screw insertion and connection. The inner walls of the bottom and top of the base (3) are provided with threaded grooves. The surface of the screw is fitted with a spring washer (24).

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