Direct-acting interlocking device based on a magnetically controlled operating mechanism

Abstract

The present invention relates to the technical field of circuit breakers, specifically a direct-acting interlock device based on a magnetic control operating mechanism, including a protective cylinder. Inside the protective cylinder, there is a vacuum arc extinguishing chamber. At the stratified part inside the vacuum arc extinguishing chamber, a static contact is fixedly connected. Inside the vacuum arc extinguishing chamber, there are also two moving contacts respectively facing the upper and lower ends of the static contact. By setting a magnetic control mechanism, the unique magnetic operating method of opening and closing of the magnetic control mechanism can achieve the switching speed of two incoming line power supplies in a shorter time, ensuring the stability of continuous operation of important electrical equipment. During opening and closing, the interlock mechanism can control the movement modes of two groups of magnetic control mechanisms to be opposite through mechanical movement, so as to ensure that when one group of magnetic control mechanisms drives the moving contact to contact and close with the static contact, the other group of magnetic control mechanisms opens, thereby reducing the possibility of current loop closing.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and specifically to a direct-acting interlock device based on a magnetically controlled operating mechanism. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry, and interrupt the current under normal circuit conditions and can close, carry, and interrupt the current under abnormal circuit conditions within a specified time. Therefore, controlling the response speed of the switch in the circuit breaker loop and safely locking the switch are the keys to ensuring the safe flow of current. However, traditional circuit breakers usually control the current flow of a single circuit and achieve current control through a series connection. Under the control of a dual power supply, there is a risk of current loop closure between the two circuit breakers in the circuit.

[0003] For example, the patent with the patent number CN110459420B discloses an integrated special medium-voltage dual-power switching device with mechanical interlock. Through unique transmission locking, it avoids the defect of misoperation caused by the failure of electronic components or the failure of the travel-in-place indication in the current electrical interlock scheme, fully ensuring that the two vacuum circuit breakers are one closed and one opened, and ensuring the safety and reliability of the line.

[0004] However, for the devices proposed in the prior art, although they can facilitate the realization of safe and reliable one closing and one opening, when the two switches are closed and opened, the locking transmission between the components during closing and opening is relatively slow, and it is easy to occur that one end is closed while the other end has not been opened, thus having a certain risk of current loop closure. Summary of the Invention

[0005] The purpose of the present invention is to make up for the deficiencies of the prior art, and provides a direct-acting interlock device based on a magnetically controlled operating mechanism. Through the setting of the interlock structure, this solution can reduce the risk of current loop closure, and through the new magnetically controlled closing and opening method, it can achieve the switching speed of two incoming line power supplies in a shorter time, ensuring the stability of continuous operation of important electrical equipment.

[0006] To solve the above problems, the present invention provides the following technical solution: a direct-acting interlock device based on a magnetically controlled operating mechanism, including a protective cylinder. A vacuum arc extinguishing chamber is arranged inside the protective cylinder. A static contact is fixedly connected to the stratified part inside the vacuum arc extinguishing chamber. Two moving contacts are also arranged inside the vacuum arc extinguishing chamber, respectively facing the upper and lower ends of the static contact.

[0007] Two groups of magnetically controlled mechanisms are also arranged outside the protective cylinder, respectively facing the upper and lower two directions of the protective cylinder. The magnetically controlled mechanism includes a housing, and an insulating transmission rod that is slidably matched with the reserved hole on the outer surface of the housing and is connected to the moving contact. The magnetically controlled mechanism is used to push the moving contact to contact the static contact through magnetic control.

[0008] The magnetic control mechanism further includes an L-shaped fixing plate fixed on the outer surface of the housing. An interlocking mechanism connected to the L-shaped fixing plate is also provided outside the protection cylinder. The interlocking mechanism includes two groups of microswitches installed on the outer surface of the L-shaped fixing plate. The microswitches are used to control the pushing or pulling of the moving contact by the magnetic control mechanism. The interlocking mechanism is used to control the mutual locking of the two groups of magnetic control mechanisms.

[0009] Further, the outer surface of the moving contact is in sliding fit with the reserved hole of the vacuum arc extinguishing chamber. The vacuum arc extinguishing chamber is used to quickly extinguish the vacuum arc generated when the static contact and the moving contact come into contact and suppress the current.

[0010] The beneficial effect of adopting the above further scheme is that by setting the vacuum arc extinguishing chamber, the outer shell of the vacuum arc extinguishing chamber is made of an airtight insulating shell made of glass or ceramic. Through the excellent insulation of the vacuum inside the tube, the medium and high voltage circuit can quickly extinguish the arc and suppress the current after cutting off the power supply, avoiding accidents and unexpected situations.

[0011] Further, the magnetic control mechanism further includes a commutator installed on the inner wall of the housing, and a magnetic coil installed at the output end of the commutator. One end of the insulating transmission rod far from the moving contact is fixedly connected with a magnetic column facing the magnetic coil. The commutator is used to supply current to the magnetic coil to control the magnetization or demagnetization of the magnetic coil.

[0012] The beneficial effect of adopting the above further scheme is that by setting the magnetic control mechanism, it is convenient to push or pull the opening and closing operation between the moving contact and the static contact. And through the unique structural design of the magnetic control mechanism, the moving contact can be quickly pushed or pulled, thereby improving the response speed of the opening and closing between the moving contact and the static contact.

[0013] Further, the magnetic control mechanism further includes a fixing ring fixed on the outer surface of the insulating transmission rod and located inside the housing. The fixing ring is located at one end of the insulating transmission rod close to the magnetic column, and a first telescopic spring sleeved on the outer surface of the insulating transmission rod. One end of the first telescopic spring is fixedly connected with the inner wall of the housing, and the other end of the first telescopic spring is attached to the end of the fixing ring far from the magnetic column. The first telescopic spring is used to push the insulating transmission rod to reset.

[0014] The beneficial effect of adopting the above further scheme is that by setting the first telescopic spring, it is convenient to push the insulating transmission rod and the moving contact to reset through the elastic restoring force of the first telescopic spring after demagnetizing the magnetic coil.

[0015] Further, the interlocking mechanism further includes a connecting plate fixedly connected to the two L-shaped fixing plates. A fixed clamping ring clamped with the connecting plate is fixedly connected to the outer surface of the protection cylinder.

[0016] The beneficial effect of adopting the above further solution is that by setting the connecting plate and the fixing snap ring, it is convenient to fix the position of the protection cylinder, avoiding the suspension of the protection cylinder and affecting the stability of the operation of the overall device.

[0017] Further, the interlocking mechanism further includes a sliding rod fixedly connected to the convex blocks on the outer surfaces of the two L-shaped fixing plates, and a sliding cylinder sleeved on the sliding rod and slidably matched with the sliding rod. Both ends of the sliding cylinder are fixedly connected with a pushing cross bar, and the elastic piece of the pushing cross bar pushing the contact end of the micro switch is used to control the opening of the micro switch.

[0018] The beneficial effect of adopting the above further solution is that by setting the sliding cylinder, it is convenient to slide in the sliding rod, and drive the pushing cross bar to move during the sliding process, so that the pushing cross bar can squeeze the elastic piece of the contact end of the micro switch, thereby starting the magnetic control mechanism to push or pull the moving contact through the micro switch.

[0019] Further, the interlocking mechanism further includes two second telescopic springs sleeved on the outer surface of the sliding rod, and both ends of the second telescopic springs are respectively connected with the pushing cross bar and the convex blocks on the outer surface of the L-shaped fixing plate.

[0020] The beneficial effect of adopting the above further solution is that by setting the second telescopic spring, it is convenient to reset after the pushing cross bar contacts and starts the micro switch, so that through the double-switch and interlocking design, the possibility of current closing loop can be reduced.

[0021] Further, the interlocking mechanism further includes a guiding strip fixed on the outer surface of the sliding cylinder and slidably matched with the connecting plate, and the guiding strip is used for guiding the movement of the sliding cylinder.

[0022] The beneficial effect of adopting the above further solution is that by setting the guiding strip, it is better to facilitate the sliding of the sliding cylinder at the connecting plate, avoiding the situation that the sliding cylinder rotates during the sliding on the sliding rod and affects the contact between the pushing cross bar and the micro switch.

[0023] Compared with the prior art, the direct-acting interlocking device based on the magnetic control operating mechanism has the following beneficial effects:

[0024] 1. By setting the magnetic control mechanism in the present invention, through the unique magnetic control operation of opening and closing by the magnetic control mechanism, the switching speed of two incoming line power supplies can be realized in a shorter time, ensuring the stability of the continuous operation of important electrical equipment. During opening and closing, the interlocking mechanism can control the movement modes of the two groups of magnetic control mechanisms to be opposite through mechanical movement, so as to ensure that when one group of magnetic control mechanisms drives the moving contact to contact and close with the static contact, the other group of magnetic control mechanisms opens, thereby reducing the possibility of current closing loop.

[0025] 2. By providing the first telescopic spring, the present invention can facilitate the elastic reset force after energy storage of the first telescopic spring to push the insulating transmission rod and the moving contact to reset and separate the moving contact from the static contact after demagnetizing the magnetic coil. The two microswitches arranged oppositely respectively control the pushing or pulling of the magnetic control mechanism on the moving contact, so that after the magnetic control mechanism drives one side of the moving contact to contact the static contact, the moving contact on the other side can be separated from the static contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the front view of the three-dimensional structure of the overall device of the present invention;

[0027] Figure 2 is the side view of the three-dimensional structure of the overall device of the present invention;

[0028] Figure 3 is the sectional view of the three-dimensional structure of the overall device of the present invention;

[0029] Figure 4 is the schematic diagram of the three-dimensional structure of the interlocking mechanism of the present invention;

[0030] Figure 5 is the internal structure sectional view of the vacuum interrupter of the present invention;

[0031] Figure 6 For the present invention Figure 3 is the partial enlarged schematic diagram at A in.

[0032] In the drawings, the list of components represented by each reference numeral is as follows:

[0033] 1. Protective cylinder; 2. Vacuum interrupter; 3. Static contact; 4. Moving contact; 5. Magnetic control mechanism; 501. Housing; 502. Insulating transmission rod; 503. Commutator; 504. Magnetic coil; 505. Magnetic column; 506. Fixed ring; 507. First telescopic spring; 508. L-shaped fixing plate; 6. Interlocking mechanism; 601. Microswitch; 602. Connecting plate; 603. Fixed clamping ring; 604. Slide bar; 605. Slide cylinder; 606. Pushing cross bar; 607. Second telescopic spring; 608. Guide bar. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0035] It should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" in the terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For those of ordinary skill in the art, the specific meanings of such terms in this patent can be understood according to specific circumstances.

[0036] As described in the background art, in the prior art, during closing and opening, the locking transmission between components is relatively slow, and it is easy to occur that one end closes while the other end has not opened yet, thus having a certain risk of current loop closing. For this reason, the present embodiment provides a direct-acting interlocking device based on a magnetically controlled operating mechanism. Through the setting of the interlocking structure, the risk of current loop closing can be reduced, and through the new magnetically controlled closing and opening method, the switching speed of two incoming line power supplies can be achieved in a shorter time, ensuring the stability of continuous operation of important electrical equipment.

[0037] See Figure 1 - Figure 6 , the present embodiment proposes a direct-acting interlocking device based on a magnetically controlled operating mechanism, including a protective cylinder 1. Inside the protective cylinder 1, a vacuum interrupter 2 is provided. A static contact 3 is fixedly connected at the layered part inside the vacuum interrupter 2. Inside the vacuum interrupter 2, two moving contacts 4 are also provided respectively facing the upper and lower ends of the static contact 3.

[0038] In the present embodiment, by providing the protective cylinder 1, it is convenient to protect the vacuum interrupter 2, and it is also convenient to stabilize the protective cylinder 1 and the vacuum interrupter 2 through subsequent components, thereby reducing the situation of shaking during actual operation. The static contact 3 is a common contact point between the two moving contacts 4.

[0039] As an embodiment, the outer surface of the moving contact 4 is slidably matched with the reserved hole of the vacuum interrupter 2. The vacuum interrupter 2 is used to quickly extinguish the vacuum arc generated when the static contact 3 and the moving contact 4 contact and suppress the current.

[0040] In the present embodiment, by providing the vacuum interrupter 2, the outer shell of the vacuum interrupter 2 is made of an airtight insulating shell made of glass or ceramic. Through the excellent insulation of the vacuum inside the tube, the medium and high voltage circuit can quickly extinguish the arc and suppress the current after cutting off the power supply, avoiding accidents and accidents. Arcs will be generated when the static contact 3 and the moving contact 4 are disengaged or separated, so the vacuum interrupter 2 quickly extinguishes the generated arc and suppresses the generation of current.

[0041] As an embodiment, two groups of magnetic control mechanisms 5 are further provided outside the protective cylinder 1 respectively facing the upper and lower directions of the protective cylinder 1. The magnetic control mechanism 5 includes a housing 501 and an insulating transmission rod 502 that is slidably matched with the reserved hole on the outer surface of the housing 501 and is connected to the moving contact 4. The magnetic control mechanism 5 is used to push the moving contact 4 to contact the static contact 3 through magnetic control.

[0042] The beneficial effects of adopting the above further solution are as follows. By setting up the magnetic control mechanism 5, it is convenient to push the moving contact 4 into contact with the static contact 3. Moreover, through the novel magnetic control operation setting of the magnetic control mechanism 5, it has a fast response and avoids the situation of complex and easily damaged internal structures.

[0043] As an implementation manner, the magnetic control mechanism 5 further includes a commutator 503 installed on the inner wall of the housing 501, and a magnetic coil 504 installed at the output end of the commutator 503. One end of the insulating transmission rod 502 away from the moving contact 4 is fixedly connected with a magnetic column 505 facing the magnetic coil 504. The magnetic coil 504 and the magnetic column 505 are arranged oppositely. The commutator 503 is used to pass current into the magnetic coil 504 to control the magnetization or demagnetization of the magnetic coil 504.

[0044] In this embodiment, by setting up the magnetic control mechanism 5, it is convenient to push or pull the moving contact 4 for opening and closing operations with the static contact 3. And through the unique structural design of the magnetic control mechanism 5, the moving contact 4 can be quickly pushed or pulled, thus improving the response speed of opening and closing between the moving contact 4 and the static contact 3.

[0045] As a supplement, when performing opening and closing operations, a forward or reverse current is passed into the commutator 503, so that the commutator 503 can quickly magnetize or demagnetize the magnetic coil 504. The magnetic coil 504 uses a novel magnetic material, which is an alnico permanent magnet alloy. It can become a permanent magnetic material after magnetization and become a non-magnetic material after demagnetization.

[0046] As a supplement, when a forward current is passed into the commutator 503, the current generates a magnetic field through the magnetic coil 504, magnetizing the alnico permanent magnet alloy and making it a permanent magnetic material. After magnetization, the magnetic coil 504 generates a magnetic repulsion on the magnetic column 505, thus maintaining the closed state. When the forward current of the commutator 503 is turned off, due to the high remanence characteristic of the alnico permanent magnet alloy, the magnetic coil 504 can still generate a magnetic repulsion on the magnetic column 505, so that it is convenient to maintain the closed state after the commutator 503 is turned off. When a reverse current is passed into the commutator 503, the reverse current generates a magnetic field in the opposite direction to that during magnetization through the magnetic coil 504, demagnetizing the alnico permanent magnet alloy. After demagnetization, the alnico permanent magnet alloy becomes a non-magnetic material, and the magnetic repulsion of the magnetic coil 504 on the magnetic column 505 disappears, thus realizing opening.

[0047] As an implementation manner, the magnetic control mechanism 5 further includes a fixing ring 506 fixed on the outer surface of the insulating transmission rod 502 and located inside the housing 501. The fixing ring 506 is located at one end of the insulating transmission rod 502 close to the magnetic column 505, and a first telescopic spring 507 sleeved on the outer surface of the insulating transmission rod 502 and located inside the housing 501. One end of the first telescopic spring 507 is fixedly connected to the inner wall of the housing 501, and the other end of the first telescopic spring 507 is attached to one end of the fixing ring 506 away from the magnetic column 505. The first telescopic spring 507 is used to push the insulating transmission rod 502 to reset.

[0048] In this embodiment, by providing the first telescopic spring 507, it is convenient to push the insulating transmission rod 502 and the moving contact 4 to reset through the elastic restoring force of the first telescopic spring 507 after demagnetizing the magnetic coil 504. When closing the switch, when the magnetic column 505 and the insulating transmission rod 502 push the moving contact 4 to close the switch, the first telescopic spring 507 is compressed and stores energy. When opening the switch, the stored energy is released to quickly open the switch.

[0049] As an implementation manner, the magnetic control mechanism 5 further includes an L-shaped fixing plate 508 fixed on the outer surface of the housing 501. An interlocking mechanism 6 connected to the L-shaped fixing plate 508 is further provided outside the protection cylinder 1. The interlocking mechanism 6 includes two groups of micro switches 601 installed on the outer surface of the L-shaped fixing plate 508. The micro switches 601 are used to control the pushing or pulling of the magnetic control mechanism 5 on the moving contact 4. The interlocking mechanism 6 is used to control the mutual locking of the two groups of magnetic control mechanisms 5.

[0050] The beneficial effect of adopting the above further solution is that by providing the interlocking mechanism 6, the interlocking mechanism 6 can control the movement modes of the two groups of magnetic control mechanisms 5 to be opposite through mechanical movement, so as to ensure that when one group of magnetic control mechanisms 5 drives the moving contact 4 to contact and close the switch with the static contact 3, the other group of magnetic control mechanisms 5 opens the switch, thereby reducing the possibility of current loop closing.

[0051] As an implementation manner, the interlocking mechanism 6 further includes a connecting plate 602 fixedly connected to the two L-shaped fixing plates 508. A fixing snap ring 603 engaged with the connecting plate 602 is fixedly connected to the outer surface of the protection cylinder 1.

[0052] In this embodiment, by providing the connecting plate 602 and the fixing snap ring 603, it is convenient to fix the position of the protection cylinder 1 and prevent the protection cylinder 1 from hanging in the air and affecting the operation stability of the overall device.

[0053] As an implementation manner, the interlocking mechanism 6 further includes a sliding rod 604 fixedly connected to the bumps on the outer surfaces of the two L-shaped fixing plates 508, and a sliding cylinder 605 sleeved on the sliding rod 604 and slidably engaged with the sliding rod 604. Both ends of the sliding cylinder 605 are fixedly connected with a pushing cross bar 606, and the pushing cross bar 606 pushes the elastic piece at the contact end of the micro switch 601 to control the opening of the micro switch 601.

[0054] In this embodiment, by providing the sliding cylinder 605, it is convenient to slide on the sliding rod 604, and during the sliding process, the pushing cross bar 606 is driven to move, so that the pushing cross bar 606 can squeeze the elastic piece at the contact end of the micro switch 601, thereby starting the pushing or pulling of the moving contact 4 by the magneto-control mechanism 5 through the micro switch 601.

[0055] As a supplement, the two groups of micro switches 601 arranged oppositely respectively control the pushing or pulling of the moving contact 4 by the magneto-control mechanism 5. Thus, after the magneto-control mechanism 5 drives one side of the moving contact 4 to contact the static contact 3, the other side of the moving contact 4 can be separated from the static contact 3, so that the interlock between the two groups of magneto-control mechanisms 5 can be realized, and the situation of current loop closure caused by simultaneously pushing the moving contact 4 to contact the static contact 3 can be avoided.

[0056] As an implementation manner, the interlocking mechanism 6 further includes two second telescopic springs 607 sleeved on the outer surface of the sliding rod 604. Both ends of the second telescopic spring 607 are respectively connected to the pushing cross bar 606 and the bumps on the outer surface of the L-shaped fixing plate 508.

[0057] In this embodiment, by providing the second telescopic spring 607, it is convenient to reset after the pushing cross bar 606 contacts and starts the micro switch 601. Thus, through the double-switch and interlock design, the possibility of current loop closure can be reduced.

[0058] As a supplement, when the sliding cylinder 605 is pulled to slide on the sliding rod 604 by an external force, the pushing cross bar 606 can be driven to move and squeeze the corresponding micro switch 601. The micro switch 601 in which the magnetic coil 504 in one group of magneto-control mechanisms 5 is energized with a positive current is started. At the same time, the micro switch 601 in which the magnetic coil 504 in the other group of magneto-control mechanisms 5 is energized with a negative current is started. Thus, the movement modes of the two groups of magneto-control mechanisms 5 can be opposite, which is convenient for the static contact 3 to contact one side of the moving contact 4 and reduces the possibility of current loop closure.

[0059] As an implementation manner, the interlocking mechanism 6 further includes a guiding strip 608 fixed on the outer surface of the sliding cylinder 605 and slidably engaged with the connecting plate 602. The guiding strip 608 is used for guiding the movement of the sliding cylinder 605.

[0060] In this embodiment, by providing a guide bar 608, it is possible to better facilitate the sliding of the slide 605 on the connecting plate 602, thereby preventing the slide 605 from rotating during the sliding process on the slide rod 604 and affecting the contact between the cross bar 606 and the micro switch 601, thereby greatly improving the practicality of the overall device.

[0061] In addition, the micro switch 601 in the present invention is a conventional device purchased on the market and known to technicians in this field. The model can be selected or customized according to actual needs. Its setting method, installation method and electrical connection method are only required to be debugged according to the requirements of its instruction manual for technicians in this field, and will not be described in detail here.

[0062] The working principle of the present invention is as follows: when closing the circuit, first pull the slide 605 downward, and the slide 605 drives the push cross bar 606 to squeeze the two micro switches 601 in the same direction under the limiting action of the slide bar 604 and the guide bar 608, so that the push cross bar 606 squeezes the elastic sheet on the micro switch 601, so that the lower micro switch 601 controls the commutator 503 on the same side to transmit the positive current to the magnetic coil 504 on the same side, and excites the magnetic coil 504 on the same side to change it into a permanent magnetic material, so that a magnetic repulsive force can be generated between the magnetic coil 504 and the magnetic column 505, and then the magnetic column 505 located above the magnetic coil 504 is pushed upward, so that the magnetic column 505 pushes the moving contact 4 on the same side to contact the static contact 3 through the insulating transmission rod 502, so as to facilitate closing the circuit.

[0063] When the cross bar 606 is pushed below to squeeze and start the micro switch 601, the cross bar 606 located above the slide 605 can squeeze the micro switch 601 on the same side and in the same direction at the same time, and the commutator 503 on the same side is controlled by the micro switch 601 to pass a reverse current, so that the commutator 503 demagnetizes the magnetic coil 504, thereby releasing the magnetic repulsion between the magnetic coil 504 and the magnetic column 505, and then the elastic reset force of the first telescopic spring 507 can push the magnetic column 505 on the same side, the insulating transmission rod 502 and the moving contact 4 and the static contact 3 to open the gate operation, and then when one group of magnetic control mechanisms 5 is started, the other group of magnetic control mechanisms 5 can be controlled to be closed, thereby completely reducing the possibility of current closing.

[0064] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0065] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. Direct-acting interlocking device based on a magnetically controlled operating mechanism, characterized in that: It includes a protective cylinder (1), inside which a vacuum interrupter (2) is arranged. At the layered part inside the vacuum interrupter (2), a static contact (3) is fixedly connected, and two moving contacts (4) are also arranged inside the vacuum interrupter (2) respectively facing the upper and lower ends of the static contact (3). On the outside of the protective cylinder (1), two sets of magnetic control mechanisms (5) are arranged respectively facing the upper and lower directions of the protective cylinder (1). The magnetic control mechanism (5) includes a housing (501), and an insulating transmission rod (502) that is slidably matched with the reserved hole on the outer surface of the housing (501) and is connected to the moving contact (4). The magnetic control mechanism (5) is used to magnetically control the contact between the moving contact (4) and the static contact (3). The magnetic control mechanism (5) also includes an L-shaped fixed plate (508) fixed on the outer surface of the housing (501). On the outside of the protective cylinder (1), an interlocking mechanism (6) connected to the L-shaped fixed plate (508) is arranged. The interlocking mechanism (6) includes two sets of microswitches (601) installed on the outer surface of the L-shaped fixed plate (508). The microswitches (601) are used to control the pushing or pulling of the magnetic control mechanism (5) on the moving contact (4). The interlocking mechanism (6) is used to control the mutual locking of the two sets of magnetic control mechanisms (5). The magnetic control mechanism (5) also includes a commutator (503) installed on the inner wall of the housing (501), and a magnetic coil (504) installed at the output end of the commutator (503). One end of the insulating transmission rod (502) away from the moving contact (4) is fixedly connected with a magnetic column (505) facing the magnetic coil (504). The commutator (503) is used to supply current to the magnetic coil (504) to control the excitation or demagnetization of the magnetic coil (504). The magnetic control mechanism (5) also includes a fixed ring (506) fixed on the outer surface of the insulating transmission rod (502) and located inside the housing (501). The fixed ring (506) is located at one end of the insulating transmission rod (502) close to the magnetic column (505), and a first telescopic spring (507) sleeved on the outer surface of the insulating transmission rod (502). One end of the first telescopic spring (507) is fixedly connected with the inner wall of the housing (501), and the other end of the first telescopic spring (507) is in contact with the end of the fixed ring (506) away from the magnetic column (505). The first telescopic spring (507) is used to push the insulating transmission rod (502) to reset. The interlocking mechanism (6) also includes a connecting plate (602) fixedly connected to the two L-shaped fixed plates (508). A fixed clamping ring (603) that is clamped with the connecting plate (602) is fixedly connected to the outer surface of the protective cylinder (1).

2. The direct-acting interlocking device based on a magnetically controlled operating mechanism according to claim 1, characterized in that: The outer surface of the moving contact (4) is slidably matched with the reserved hole of the vacuum interrupter (2). The vacuum interrupter (2) is used to quickly extinguish the vacuum arc generated when the static contact (3) and the moving contact (4) contact and suppress the current.

3. The direct-acting interlocking device based on a magnetically controlled operating mechanism according to claim 1, characterized in that: The interlocking mechanism (6) further includes a sliding rod (604) fixedly connected to the bumps on the outer surfaces of two L-shaped fixing plates (508), and a sliding cylinder (605) sleeved on the sliding rod (604) and slidably engaged with the sliding rod (604). Both ends of the sliding cylinder (605) are fixedly connected with a pushing cross bar (606). The elastic piece at the contact end of the pushing cross bar (606) that pushes the micro switch (601) is used to control the opening of the micro switch (601).

4. The direct-acting interlocking device based on a magnetically controlled operating mechanism according to claim 1, characterized in that: The interlocking mechanism (6) further includes two second telescopic springs (607) sleeved on the outer surface of the sliding rod (604). Both ends of the second telescopic spring (607) are respectively connected to the pushing cross bar (606) and the bumps on the outer surface of the L-shaped fixing plate (508).

5. The direct-acting interlocking device based on a magnetically controlled operating mechanism according to claim 1, characterized in that: The interlocking mechanism (6) further includes a guiding strip (608) fixed on the outer surface of the sliding cylinder (605) and slidably engaged with the connecting plate (602). The guiding strip (608) is used for guiding the movement of the sliding cylinder (605).

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