Lower isolation mechanism of environment-friendly cabinet

Abstract

The utility model provides a lower isolation mechanism of an environment-friendly cabinet, which comprises a main frame body and a disconnecting link connecting rod, the lower part of the disconnecting link connecting rod is connected with an isolation disconnecting link, and the isolation disconnecting link is provided with a magnetic positioning assembly. The rotating shaft drives the knife switch cam to rotate, the knife switch cam is eccentrically connected with the knife switch connecting rod, and rotating motion is converted into linear motion of the knife switch connecting rod. And the disconnecting link connecting rod drives the disconnecting link to move up and down so as to realize contact or separation with the disconnecting link isolating contact, thereby completing on-off of a circuit. The magnetic positioning assembly is composed of a permanent magnet and an electromagnet, the permanent magnet is fixed on the isolation switch, and the electromagnet is installed on the isolation contact of the switch. When the isolation switch is close to a closed position, the electromagnet is electrified to generate a magnetic field, and the electromagnet and the permanent magnet attract each other to form stable magnetic locking, so that the isolation switch is ensured to be accurately in place, and the problems of positioning deviation and isolation effect reduction caused by abrasion in long-term work of a traditional isolation mechanism are effectively solved.

Description

Technical Field

[0001] The utility model relates to the field of isolation mechanisms, in particular to an isolation mechanism under an environmental protection cabinet. Background Art

[0002] An environmental protection cabinet is an environmental protection gas electrical cabinet. Environmental protection gas is used to extinguish arcs during segmentation. As a key component, the electrical cabinet undertakes the important functions of protecting internal electrical components, distributing electrical energy and realizing electrical control; Chinese utility model patent application number: CN202021186616.X proposes an environmental protection cabinet mechanism interlocking device with isolation, including an interlocking plate, a closing button, a closing operation hole equipped with a mechanism top plate, an isolation operation hole and a grounding operation hole. The isolation operation hole and the grounding operation hole are arranged on both sides of the interlocking plate and are located on the lateral movement trajectory of the interlocking plate. The closing button drives the mechanism top plate to rotate, and it also includes a locking plate. The mechanism top plate drives the locking plate to move longitudinally. The interlocking plate and the closing button are arranged on the movement trajectory of the locking plate. A fastening portion is provided on the end of the locking plate facing the interlocking plate, and a groove is provided on the interlocking plate. The fastening portion extends into the groove for fixation.

[0003] However, there are some shortcomings in the existing environmental protection cabinet isolation mechanism during use, and there is still a need for improvement. The existing isolation mechanism under the electrical cabinet often adopts the traditional mechanical or electrical isolation method. Mechanical or electrical is prone to wear during long-term operation, which makes the isolation mechanism have deviations in the isolation action during the isolation process, thereby reducing the stability and reliability of the external environment. The isolation effect is not ideal and even causes failures. Therefore, we make improvements to this and propose an isolation mechanism under the environmental protection cabinet. Utility Model Content

[0004] The purpose of the utility model is to address the problems raised by the existing background technology. In order to achieve the above-mentioned purpose of the utility model, the utility model provides the following technical solutions: an isolation mechanism under an environmental protection cabinet, comprising a main frame, a stepper motor is arranged on the main frame, a rotating shaft is arranged on the stepper motor, the rotating shaft is connected to a knife gate cam, the knife gate cam is eccentrically connected to a knife gate connecting rod, the lower part of the knife gate connecting rod is connected to an isolation knife gate, an isolation head is arranged below the isolation knife gate, a knife gate isolation contact is arranged below the isolation head, the knife gate isolation contact is arranged on a contact base, an insulating cover is arranged on the contact base, a magnetic positioning assembly is arranged on the isolation knife gate, the magnetic positioning assembly is composed of a permanent magnet and an electromagnet, the permanent magnet is arranged on the isolation knife gate, and the electromagnet is arranged on the knife gate isolation contact.

[0005] As a preferred technical solution of the utility model, an isolation plate is provided on the outer surface of the contact base, and an installation positioning hole is provided on the isolation plate.

[0006] As a preferred technical solution of the utility model, a lifting sliding block is arranged between the knife switch connecting rod and the isolation knife switch, and the lifting sliding block is sleeved inside the sliding sleeve of the slider.

[0007] As a preferred technical solution of the utility model, the bottom end of the lifting sliding block is connected to the isolating knife switch.

[0008] As a preferred technical solution of the utility model, the stepper motor is connected to the battery wire.

[0009] As a preferred technical solution of the utility model, an insulating sleeve is provided on the upper part of the isolation plate.

[0010] As a preferred technical solution of the utility model, the electromagnet is provided with a U-shaped groove.

[0011] As a preferred technical solution of the utility model, a buffer spring is arranged on the main frame.

[0012] Compared with the prior art, the utility model has the following beneficial effects: In the solution of the utility model: the magnetic positioning component ensures that the isolation knife switch can be accurately positioned during the closing process, reducing the positioning deviation caused by mechanical wear.

[0013] Enhanced stability and reliability: The magnetic locking mechanism improves the stability of the isolation action and reduces the impact of external factors on the isolation effect.

[0014] The permanent magnet is fixed on the isolation knife switch, and the electromagnet is installed on the isolation contact of the knife switch.

[0015] When the isolation knife switch is close to the closed position, the electromagnet is energized to generate a magnetic field, which attracts the permanent magnet to form a stable magnetic lock, ensuring that the isolation knife switch is accurately in place.

[0016] This magnetic locking not only improves the accuracy of the isolation action, but also reduces mechanical wear and extends the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure provided by the utility model;

[0018] Figure 2 A schematic diagram of the permanent magnet structure provided by the utility model;

[0019] Figure 3 A schematic diagram of the main frame structure provided by the utility model;

[0020] Figure 4 A schematic diagram of the isolation knife switch structure provided by the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the magnetic positioning component provided by the utility model.

[0022] Indicated in the figure:

[0023] 1. Main frame; 2. Stepper motor; 201. Rotating shaft; 3. Isolating knife switch; 301. Knife switch connecting rod; 302. Knife switch cam; 303. Isolating head; 304. Lifting sliding block; 305. Sliding sleeve of slider; 4. Knife switch isolating contact; 401. Contact base; 402. Insulating cover; 5. Magnetic positioning assembly; 501. Permanent magnet; 502. Electromagnet; 6. Isolating plate; 601. Installation positioning hole; 7. Buffer spring; 8. Insulating sleeve. DETAILED DESCRIPTION

[0024] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0025] Therefore, the following detailed description of the embodiments of the utility model is not intended to limit the scope of the utility model for which protection is sought, but merely represents some embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. It should be noted that the embodiments of the utility model and the features and technical solutions in the embodiments can be combined with each other without conflict. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0026] Example 1: Please refer to Figure 1-Figure 5 A lower isolation mechanism of an environmental protection cabinet comprises a main frame 1, a stepper motor 2 is arranged on the main frame 1, a rotating shaft 201 is arranged on the stepper motor 2, the rotating shaft 201 is connected to a knife gate cam 302, the knife gate cam 302 is eccentrically connected to a knife gate connecting rod 301, the lower part of the knife gate connecting rod 301 is connected to an isolation knife gate 3, an isolation head 303 is arranged below the isolation knife gate 3, a knife gate isolation contact 4 is arranged below the isolation head 303, the knife gate isolation contact 4 is arranged on a contact base 401, an insulating cover 402 is arranged on the contact base 401, a magnetic positioning component 5 is arranged on the isolation knife gate 3, and the magnetic positioning component 5 is composed of a permanent magnet 501 and an electromagnet 502, the permanent magnet 501 is arranged on the isolation knife gate 3, and the electromagnet 502 is arranged on the knife gate isolation contact 4.

[0027] The outer surface of the contact base 401 is provided with an isolation plate 6, and the isolation plate 6 is provided with a mounting positioning hole 601. A lifting sliding block 304 is provided between the knife switch connecting rod 301 and the isolation knife switch 3, and the lifting sliding block 304 is sleeved inside the slider sliding sleeve 305. The bottom end of the lifting sliding block 304 is connected to the isolation knife switch 3. The stepper motor 2 is connected to the battery wire. An insulating sleeve 8 is provided on the upper part of the isolation plate 6. The electromagnet 502 is provided with a U-shaped groove. A buffer spring 7 is provided on the main frame 1.

[0028] During the use of the utility model, the isolation mechanism under the environmental protection cabinet realizes accurate and stable control of the isolation knife switch 3 by combining mechanical transmission and magnetic positioning, effectively solving the positioning deviation and isolation effect degradation problems caused by wear of the traditional isolation mechanism in long-term work. The following is its working principle and specific working process:

[0029] Working principle: The stepper motor 2 is used as a power source to drive the rotating shaft 201 to rotate through its precisely controlled step angle. The rotating shaft 201 drives the knife gate cam 302 to rotate. The knife gate cam 302 is eccentrically connected to the knife gate connecting rod 301, converting the rotational motion into the linear motion of the knife gate connecting rod 301. The knife gate connecting rod 301 drives the isolation knife gate 3 to move up and down to achieve contact or separation with the knife gate isolation contact 4, thereby completing the circuit. The magnetic positioning component 5 is composed of a permanent magnet 501 and an electromagnet 502. The permanent magnet 501 is fixed on the isolation knife gate 3, and the electromagnet 502 is installed on the knife gate isolation contact 4.

[0030] When the isolation knife switch 3 is close to the closed position, the electromagnet 502 is energized to generate a magnetic field, which attracts the permanent magnet 501 to form a stable magnetic lock, thereby ensuring that the isolation knife switch 3 is accurately in place.

[0031] This magnetic locking not only improves the accuracy of the isolation action, but also reduces mechanical wear and extends the service life of the equipment.

[0032] The isolation plate 6 and the insulating cover 402 on the contact base 401 provide additional safety protection to prevent accidental electric shock.

[0033] The design of the lifting sliding block 304 and the sliding block sliding sleeve 305 makes the movement of the knife switch connecting rod 301 more stable and reduces friction and vibration.

[0034] The buffer spring 7 is used to absorb the impact energy of the isolation knife switch 3 during the closing or opening process, further protecting the mechanism from damage.

[0035] Specific work process:

[0036] Initial state: the isolating knife switch 3 is in the open position, separated from the knife switch isolating contact 4, and the circuit is disconnected. The electromagnet 502 is not energized, and there is no interaction between the permanent magnet 501 and the electromagnet 502.

[0037] Closing process: After receiving the closing signal, the stepper motor 2 starts and drives the rotating shaft 201 to rotate. The knife gate cam 302 rotates with the rotating shaft 201 and pushes the knife gate connecting rod 301 downward through the eccentric connection. The knife gate connecting rod 301 drives the isolation knife gate 3 to move downward and approach the knife gate isolation contact 4. When the isolation knife gate 3 approaches the closed position, the electromagnet 502 is energized and attracts the permanent magnet 501 to form a magnetic lock to ensure that the isolation knife gate 3 is precisely in place.

[0038] Holding state: The electromagnet 502 is continuously energized to maintain the magnetic locking state, ensuring that the isolation switch 3 is stably closed and the circuit is connected.

[0039] Opening process: When the circuit needs to be disconnected, the electromagnet 502 is powered off and the magnetic lock is released. The stepper motor 2 reverses and drives the isolation knife switch 3 to move upward through the mechanical transmission system and separate from the knife switch isolation contact 4. The isolation knife switch 3 returns to the initial position and the circuit is disconnected.

[0040] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention are included in the scope of the claims of the present invention.

Claims

1. An isolation mechanism under an environmental protection cabinet, comprising a main frame (1), a stepper motor (2) being arranged on the main frame (1), a rotating shaft (201) being arranged on the stepper motor (2), the rotating shaft (201) being connected to a knife gate cam (302), characterized in that: The knife gate cam (302) is eccentrically connected to the knife gate connecting rod (301); the lower part of the knife gate connecting rod (301) is connected to the isolating knife gate (3); an isolating head (303) is arranged below the isolating knife gate (3); a knife gate isolating contact (4) is arranged below the isolating head (303); the knife gate isolating contact (4) is arranged on a contact base (401); an insulating cover (402) is arranged on the contact base (401); a magnetic positioning component (5) is arranged on the isolating knife gate (3); the magnetic positioning component (5) is composed of a permanent magnet (501) and an electromagnet (502); the permanent magnet (501) is arranged on the isolating knife gate (3); and the electromagnet (502) is arranged on the knife gate isolating contact (4).

2. The isolation mechanism under the environmental protection cabinet according to claim 1, characterized in that: An isolation plate (6) is provided on the outer surface of the contact base (401), and a mounting positioning hole (601) is provided on the isolation plate (6).

3. The isolation mechanism under the environmental protection cabinet according to claim 1, characterized in that: A lifting sliding block (304) is provided between the knife switch connecting rod (301) and the isolation knife switch (3), and the lifting sliding block (304) is sleeved inside the slider sliding sleeve (305).

4. The isolation mechanism under the environmental protection cabinet according to claim 3, characterized in that: The bottom end of the lifting sliding block (304) is connected to the isolation knife switch (3).

5. The isolation mechanism under the environmental protection cabinet according to claim 1, characterized in that: The stepper motor (2) is connected to the battery wire.

6. The isolation mechanism under the environmental protection cabinet according to claim 2, characterized in that: An insulating sleeve (8) is arranged on the upper part of the isolation plate (6).

7. The isolation mechanism under the environmental protection cabinet according to claim 1, characterized in that: The electromagnet (502) is provided with a U-shaped groove.

8. The isolation mechanism under the environmental protection cabinet according to claim 1, characterized in that: A buffer spring (7) is provided on the main frame (1).

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