Control and protection switching device

Abstract

The invention relates to a control and protection switching device, which comprises a base, an outer shell, and a current transformer group, a permanent magnet coil mechanism, a main contact mechanism, a transmission part, an operating mechanism and a control power supply circuit which are respectively mounted on the base, and is characterized in that the permanent magnet coil mechanism comprises a rectangular shell, a static iron core, a movable iron core, an alternating current coil and a rebound spring; the transmission part is connected with the movable iron core, the two ends of the transmission part extend to the outer side of the rectangular shell, one end of the transmission part is connected with a downward pressing assembly and acts on the main contact mechanism to control on-off of the main contact mechanism, and the other end of the transmission part acts on a fault signal microswitch on a control power circuit to control on-off of the fault signal microswitch. An alternating current coil microswitch is installed on the rectangular shell, and the operating mechanism is rotationally connected to the rectangular shell and controls the alternating current coil microswitch to be turned on and turned off through a linkage piece. The switch has the advantages of being good in stability and reliability in the working process and capable of being automatically switched off when an external power source is suddenly powered off.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a control and protection switch electrical appliance. Background Art

[0002] As an integrated electrical product in the field of low-voltage electrical appliances, control and protection switchgear realizes integrated and internally coordinated control and protection functions in a single structural form of product. It can replace a variety of traditional discrete components such as circuit breakers (fuses), contactors, overload relays, starters, isolators and auxiliary electrical appliances, and is therefore increasingly widely used.

[0003] At present, a commonly used control and protection switch electrical appliance on the market is a horizontal structure, and the working principle of its electromagnetic operating mechanism is: when the control power circuit energizes the coil of the AC electromagnet, the moving iron core generates electromagnetic force after the coil is energized and overcomes the reaction force of the spring to move horizontally toward the static iron core until it is attracted together; and in the process of the moving iron core moving toward the static iron core, the arm support of the transmission mechanism drives the moving contact of the main circuit to be linked, and when the moving iron core and the static iron core are attracted together, the moving contact is closed with the static contact under the action of the reset spring to achieve the connection of the main circuit, and the moving iron core relies on the electromagnetic force to overcome the reaction force of the spring to maintain the attraction with the static iron core; when the control power circuit de-energizes the coil of the AC electromagnet, or when the external power supply is suddenly cut off, the electromagnetic force used to keep the moving iron core and the static iron core attracted disappears, and the moving iron core moves in the direction of separating from the static iron core under the reaction force of the spring, and at the same time, the moving contact is linked to the static contact through the transmission mechanism to achieve the disconnection of the main circuit.

[0004] In the prior art, the opening of the switch is achieved by controlling the power supply circuit to send a reverse magnetic force to the coil and the reverse electromotive force on the moving iron core to offset the suction force of the permanent magnet. That is, in order to change the switch from a closed state to an open state, the control power supply circuit must send a reverse magnetic force to the coil and the reverse electromotive force on the moving iron core to offset the suction force of the permanent magnet. In this way, when an unexpected power outage occurs, the external power supply is cut off, the control power supply circuit cannot send a reverse magnetic force to the coil, and the moving iron core cannot generate a reverse electromotive force, resulting in no force to overcome the suction force of the permanent magnet to open the switch. Therefore, when the power outage occurs, the switch is always in the on state, and there is a lack of the feature of automatically opening the switch when the external power supply is suddenly cut off. Summary of the invention

[0005] The present application provides a control and protection switch electrical appliance, which has good stability and reliability during operation, and the switch can be automatically disconnected when the external power supply is suddenly cut off.

[0006] The present application provides a control and protection switch electrical appliance adopting the following technical solution: A control and protection switch electrical appliance, comprising a base, an outer housing covering the base, and a current transformer group, a permanent magnet coil mechanism, a main contact mechanism, a transmission member, an operating mechanism, and a control power circuit connected to an external power supply, which are respectively installed on the base. The current transformer group is connected to the main contact mechanism. The permanent magnet coil mechanism includes a rectangular housing installed on the base, a static iron core fixedly installed below the interior of the rectangular housing, a moving iron core vertically and directionally slidably installed in the rectangular housing and above the static iron core, an alternating current coil fixedly installed between the static iron core and the moving iron core, and a rebound spring acting between the static iron core and the moving iron core. The transmission member is connected to the moving iron core and extends to the outside of the rectangular housing at both ends. One end of the transmission member is connected with a pressing component and acts on the main contact mechanism to control the on-off of the main contact mechanism. The other end of the transmission member acts on a fault signal micro switch on the control power circuit to control its on-off. An alternating current coil micro switch for controlling the on-off of the alternating current coil is installed on the rectangular housing. The operating mechanism is rotatably connected to the rectangular housing, and the operating mechanism controls the opening and closing of the alternating current coil micro switch through a linkage member.

[0007] Preferably, the linkage member includes a positioning column fixedly installed on the rectangular housing, a feeding rod rotatably installed at one end on the rectangular housing, and a limiting column fixedly installed on one side of the alternating current coil micro switch. The other side of the alternating current coil micro switch is rotatably installed on the positioning column and can rotate around the positioning column. The feeding rod is provided with an arc-shaped card slot, and the operating mechanism can control the feeding rod to rotate back and forth on the rectangular housing. When the control and protection switch electrical appliance is turned on, the limiting column is limited and clamped in the arc-shaped card slot, and at this time the alternating current coil micro switch is in an open state. When the control and protection switch electrical appliance is turned off, the operating mechanism controls the feeding rod to rotate so that the limiting column disengages from the arc-shaped card slot, and the alternating current coil micro switch rotates around the positioning column to become a disconnected state.

[0008] Preferably, the operating mechanism includes a knob switch rotatable on the outer housing, a cam handle rod rotatably installed at one end on the rectangular housing, and a tripping link assembly arranged on the rectangular housing. The other end of the cam handle rod is connected to the knob switch. When the control and protection switch electrical appliance is turned off, the knob switch drives the feeding rod to rotate so that the limiting column disengages from the arc-shaped card slot. When the control and protection switch electrical appliance is turned on, the knob switch drives the feeding rod to rotate so that the limiting column is clamped in the arc-shaped card slot, and the tripping link assembly limits the form of the pressing component in the on state of the control and protection switch electrical appliance.

[0009] Preferably, the release connecting rod assembly includes a release body installed on a rectangular shell, a connecting rod swing arm rotatably installed on the rectangular shell in the middle, a compression spring acting between the rectangular shell and the connecting rod swing arm in a compressed state, and a release torsion spring installed between a cam handle rod and a driving part of the release body; a positioning protrusion is provided on the cam handle rod, and a positioning slot is opened on the connecting rod swing arm. When the control and protection switch electrical appliance is turned on, the compression spring in the initial state acts on the connecting rod swing arm to cause one end of the connecting rod swing arm to always contact the pressing assembly, so that the pressing assembly acts on the main contact mechanism to control the main contact mechanism to be turned on; when the control and protection switch electrical appliance is abnormal, the driving part of the release body acts on the other end of the connecting rod swing arm. At this time, the connecting rod swing arm rotates relative to the rectangular shell, and the pressing assembly is linked to disconnect the main contact mechanism; at the same time, the movement of the driving part of the release body causes the release torsion spring to drive the cam handle rod to rotate and release.

[0010] Preferably, the release connecting rod assembly includes a release body installed on a rectangular shell, a connecting rod swing arm rotatably installed on the rectangular shell at one end, and a compression spring acting between the rectangular shell and the connecting rod swing arm in a compressed state; a positioning protrusion is provided on the cam handle rod, and a positioning slot is opened on the connecting rod swing arm. When the control and protection switch electrical appliance is turned on, the compression spring acts on the connecting rod swing arm to cause the positioning protrusion to be stuck in the positioning slot; when the control and protection switch electrical appliance is abnormal, the driving part of the release body acts on the other end of the connecting rod swing arm, and at this time the positioning protrusion is disengaged from the positioning slot, causing the knob switch to drive the cam handle rod to rotate and release.

[0011] Preferably, the knob switch includes a knob body and a first shift block and a second shift block respectively arranged on the knob body, the first shift block protrudes from the second shift block, the first shift block is used to shift the material lever to rotate so that the limit column is clamped in the arc-shaped slot; the second shift block is used to shift the material lever to rotate so that the limit column is disengaged from the arc-shaped slot.

[0012] Preferably, a switch fault signal micro switch electrically connected to the control power supply circuit is fixedly mounted on the rectangular housing, and the operating mechanism rotates to control the opening and closing of the switch fault signal micro switch, and when the control and protection switch electrical appliance is disconnected, the cam handle acts on the switch fault signal micro switch.

[0013] Preferably, the main contact mechanism includes a contactor body mounted on the base, a push rod, and a static contact group, a contact support, a moving contact group, and a contact spring arranged inside the contactor body. The contact support slides directionally inside the contactor body; the moving contact group is mounted on the contact support, one end of the push rod is fixedly connected to the contact support, and the other end thereof is arranged to penetrate outside the contactor body; the contact spring acts between the contactor body and the contact support, and in the initial state, the moving contact group is located above the static contact group; when the control and protection switch electrical appliance is turned on, the pressing component acts on the push rod to compress the contact spring, and the moving contact group is connected to the static contact group.

[0014] Preferably, the pressing component includes a lower pressing plate rotatably connected to one end of the transmission member and a return torsion spring mounted between the transmission member and the lower pressing plate. The other end of the lower pressing plate is provided with a bending portion, and when the control and protection switch electrical appliance is turned on, the bending portion of the bending portion acts on the push rod of the main contact mechanism.

[0015] Preferably, the contactor body is connected with a current short-circuit release, and the current short-circuit release is electrically connected to the control power supply circuit; a relief groove is formed in the push rod. When the control and protection switch electrical appliance is short-circuited, the driving rod of the current short-circuit release extends into the relief groove and is used to limit the movement of the push rod in the direction of the static contact group.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: The coil of the AC electromagnet is energized by controlling the power supply circuit. After the moving iron core is energized by the AC coil, an electromagnetic force is generated and it moves vertically towards the static iron core against the reaction force of the return spring until they are attracted together. During the movement of the moving iron core towards the static iron core, one end of the transmission part acts on the main contact mechanism through the pressing component, and the other end of the transmission part acts on the fault signal microswitch on the control power supply circuit, indicating that the control and protection switch electrical appliance and its control power supply circuit are normal, the main contact mechanism is connected, and the main circuit is connected; when the coil of the AC electromagnet is de-energized by the control power supply circuit or the external power supply suddenly cuts off, the electromagnetic force used to keep the moving iron core and the static iron core attracted disappears, and the moving iron core moves upward in the direction of separating from the static iron core under the reaction force of the return spring. At the same time, the acting force of the pressing component on the main contact mechanism disappears, realizing the disconnection of the main circuit; when the current or voltage of the control power supply circuit is abnormal, the control switch in the operating mechanism touches the fault signal microswitch and causes it to open, and then the signal lamp electrically connected to the switch fault signal microswitch lights up. At the same time, the AC coil microswitch cannot be opened under the interaction of the operating mechanism and the linkage, the moving iron core and the static iron core cannot be attracted, further restricting the pressing of the transmission part, the main contact mechanism cannot be connected, and the operating mechanism cannot maintain the connected state, realizing the state that the trip control and protection switch electrical appliance cannot be opened. Further, when the current or voltage of the control power supply circuit is abnormal, the safety of the protected electrical equipment is effectively protected; The first dial block is provided to turn the feeding rod so that the limit post is clamped in the arc-shaped card slot, and the second dial block is used to turn the feeding rod so that the limit post is disengaged from the arc-shaped card slot; when the control and protection switch electrical appliance is connected, the knob switch in the operating mechanism rotates and the first dial block drives the feeding rod to rotate so that the limit post is clamped in the arc-shaped card slot. At this time, the AC coil microswitch is in a fixed state and the AC coil microswitch is turned on; the knob switch rotates and the second dial block drives the feeding rod to rotate so that the limit post disengages from the arc-shaped card slot. At this time, the AC coil microswitch can rotate around the positioning post, and the AC coil microswitch becomes a disconnected state; the opening and closing of the AC coil microswitch are controlled by the rotation of the knob switch, and then the on and off of the AC coil are controlled, improving the safety and stability of the control and protection switch electrical appliance; By setting a tripper connecting rod assembly, when the knob switch is turned to connect the control and protection switch normally, one end of the connecting rod swing arm always contacts the lower pressure plate in the lower pressure assembly, so that the lower pressure plate acts on the main contact mechanism in a vertical state to control the main contact mechanism to connect; when the control and protection switch is abnormal, the electromagnets in the tripper body lose power and bounce off each other, so that its driving part acts on the other end of the connecting rod swing arm. At this time, the compression spring is compressed under the action of the driving part of the tripper body, and the connecting rod swing arm rotates relative to the rectangular shell, and the lower pressure plate is linked to disconnect the main contact mechanism; at the same time, the movement of the driving part of the tripper body prompts the tripping torsion spring to drive the cam handle rod to rotate and trip, the knob switch is reset, and the cam handle rod is driven to rotate, so that the tripping control and protection switch are automatically disconnected; By arranging a tripper connecting rod assembly in the operating mechanism, when the knob switch is turned to turn on the control and protection switch electrical appliance, the compression spring acts on the connecting rod swing arm to cause the positioning protrusion to be clamped in the positioning slot. At this time, when the knob switch is turned on, the circumferential limit is performed by the connecting rod swing arm; when the control and protection switch electrical appliance is abnormal, the electromagnets in the tripper body lose power and bounce away from each other, so that its driving part acts on the other end of the connecting rod swing arm. At this time, the compression spring is compressed by the driving part of the tripper body, the positioning protrusion is separated from the positioning slot, and the knob switch is reset under the action of its own torsion spring, and drives the cam handle rod to rotate, so that the tripping control and protection switch electrical appliance is automatically disconnected; By fixing a switch fault signal micro switch electrically connected to the control power supply circuit on the rectangular housing, the operating mechanism rotates the control switch fault signal micro switch to open and close. When the control and protection switch electrical appliance is abnormal, the cam handle rod passively rotates, and the circumferential surface of the cam handle rod acts on the control switch fault signal micro switch and prompts it to open, thereby lighting up the signal light electrically connected to the switch fault signal micro switch, thereby improving the safety stability and reminder function of the control and protection switch electrical appliance. A current short-circuit releaser is connected to the contactor body, and the current short-circuit releaser is electrically connected to the control power supply circuit; a clearance groove is opened on the top rod. When the control and protection switch electrical appliance is short-circuited, the driving rod of the current short-circuit releaser extends into the clearance groove to limit the movement of the top rod toward the static contact group, thereby limiting the downward pressure of the transmission part and the downward pressure component, thereby preventing the static iron core and the moving iron core from being attracted, and achieving the control and protection switch electrical appliance when short-circuited. The operating mechanism cannot remain in the on state, effectively protecting the safety of electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the control and protection switch electrical appliance of Example 1; Figure 2 It is a structural schematic diagram of the control and protection switch electrical apparatus of Example 1 without the outer shell; Figure 3It is a cross-sectional view of the control and protection switch device in Embodiment 1, excluding the outer casing at the knob switch; Figure 4 It is a schematic diagram of the partial structure inside the control and protection switch device in Embodiment 1; Figure 5 It is a schematic diagram of the partial structure of the permanent magnet coil mechanism, transmission part, operating mechanism, and linkage part in Embodiment 1; Figure 6 It is Figure 5 the enlarged view at A in Figure 7 It is the partial structure between the cam handle rod and the linkage part when the control and protection switch device in Embodiment 1 is turned on; Figure 8 It is Figure 7 the top view of Figure 9 It is a schematic diagram of the partial structure of the main contact mechanism, permanent magnet coil mechanism, transmission part, and downward pressing component in Embodiment 1; Figure 10 It is a schematic diagram of the partial structure of the permanent magnet coil mechanism and the transmission part in Embodiment 2; Figure 11 It is a schematic diagram of the partial structure mainly showing the operating mechanism in Embodiment 2; Figure 12 It is a schematic diagram of the partial structure of the permanent magnet coil mechanism and the transmission part in Embodiment 2; Figure 13 It is a schematic diagram of the partial structure of the main contact mechanism, permanent magnet coil mechanism, transmission part, and downward pressing component in Embodiment 2.

[0018] Description of the reference numerals: 1. Base; 11. Outer housing; 2. Current transformer bank; 3. Permanent magnet coil mechanism; 31. Rectangular housing; 311. Limit groove; 312. Guide groove; 32. Static iron core; 33. Moving iron core; 34. AC coil; 35. Rebound spring; 4. Main contact mechanism; 41. Contactor body; 42. Thrust rod; 421. Relief groove; 43. Static contact set; 44. Contact support; 45. Moving contact set; 46. Contact spring; 47. Current short - circuit release; 5. Transmission member; 51. Horizontal plate; 52. First pressing plate; 53. Lower pressing assembly; 531. Lower pressing plate; 532. Reset torsion spring; 533. Bending portion; 54. U - shaped portion; 6. Operating mechanism; 61. Rotary switch; 611. Rotary knob body; 612. First dialing block; 613. Second dialing block; 62. Cam handle rod; 621. Positioning projection; 63. Release link assembly; 631. Release body; 632. Link swing arm; 6321. Positioning card slot; 6322. Limit block; 633. Compression spring; 634. Release torsion spring; 7. Control power circuit; 8. AC coil micro - switch; 9. Linkage member; 91. Positioning post; 92. Feeding rod; 921. Arc - shaped card slot; 93. Limit post; 10. Switch failure signal micro - switch. Detailed implementation manners

[0019] The following further elaborates on the present application with reference to the accompanying drawings.

[0020] The embodiment of the present application discloses a control and protection switch electrical appliance. Embodiment 1

[0021] Referring to Figure 1 、 Figure 2 the control and protection switch electrical appliance includes a base 1, an outer housing 11 covering the base 1, and a current transformer bank 2, a permanent magnet coil mechanism 3, a main contact mechanism 4, a transmission member 5, an operating mechanism 6, and a control power circuit 7 connected to an external power supply, all of which are respectively installed on the base 1. The current transformer bank 2 is connected to the main contact mechanism 4.

[0022] Among them, the control power circuit 7 includes a CPU main chip and its peripheral circuits having a control power circuit 7, a signal conditioning and processing circuit, and a control voltage sampling circuit, and also includes a CPU, a release output circuit, and a three - phase current sampling circuit. It should be noted that since the structures of the control power circuit 7, the keyboard liquid crystal display mechanism, the two - way communication interface, the current transformer bank 2, and their installation methods already belong to the conventional installation means in the technical field, they will not be elaborated in detail in this embodiment. Moreover, it should be understood that the conventional component settings and installation methods in the control and protection switch electrical appliance except for the control power circuit 7, the keyboard liquid crystal display mechanism, and the two - way communication interface should be included in the protection scope of the present invention.

[0023] Combined with Figure 2 and Figure 3 Figure 3 , the permanent magnet coil mechanism 3 includes a rectangular housing 31 mounted on the base 1, a static iron core 32 fixedly installed below the interior of the rectangular housing 31, a moving iron core 33 vertically and directionally slidably installed within the rectangular housing 31 and located above the static iron core 32, an AC coil 34 fixedly installed between the static iron core 32 and the moving iron core 33, and a rebound spring 35 acting between the static iron core 32 and the moving iron core 33.

[0024] Combined with Figures 3 to 9 Figures 3 to 9 , the transmission member 5 includes a cross plate 51 and a first pressing plate 52 integrally connected to one end of the cross plate 51. The cross plate 51 is partially fixedly connected to the moving iron core 33 and extends to the outside of the rectangular housing 31 at both ends; the first pressing plate 52 at one end of the transmission member 5 acts on the fault signal micro switch on the control power circuit 7 to control its on-off, and the other end of the transmission member 5 is connected with a downward pressing assembly 53 and acts on the main contact mechanism 4 to control the on-off of the main contact mechanism 4; when the coil of the AC electromagnet is energized through the control power circuit 7, the moving iron core 33 generates an electromagnetic force after the AC coil 34 is energized and moves vertically towards the static iron core 32 against the reaction force of the rebound spring 35 until they are attracted together. During the movement of the moving iron core 33 towards the static iron core 32, the downward pressing assembly 53 at one end of the transmission member 5 acts on the main contact mechanism 4 to control the main contact mechanism 4 to be turned on.

[0025] An AC coil micro switch 8 for controlling the on-off of the AC coil 34 is installed on the rectangular housing 31. The operating mechanism 6 is rotatably connected to the rectangular housing 31, and the operating mechanism 6 controls the opening and closing of the AC coil micro switch 8 through a linkage member 9.

[0026] The operating mechanism 6 includes a knob switch 61 rotatable on the outer housing 11, a cam handle rod 62 with one end rotatably installed on the rectangular housing 31, and a tripping link assembly 63 arranged on the rectangular housing 31. The other end of the cam handle rod 62 is connected to the knob switch 61, and the tripping link assembly 63 limits the form of the downward pressing assembly 53 in the on state of the control and protection switch electrical appliance.

[0027] Combined with Figures 4 to 6 Figures 4 to 6 , the linkage member 9 includes a positioning post 91 fixedly installed on the rectangular housing 31, a feeding rod 92 with one end rotatably installed on the rectangular housing 31, and a limiting post 93 fixedly installed on one side of the AC coil micro switch 8. The other side of the AC coil micro switch 8 is rotatably installed on the positioning post 91 and can rotate around the positioning post 91; the feeding rod 92 is arranged in an overall V-shaped structure, and an arc-shaped card slot 921 is provided on one side of the V-shaped groove of the feeding rod 92. The operating mechanism 6 can control the feeding rod 92 to rotate back and forth on the rectangular housing 31.

[0028] The knob switch 61 includes a knob body 611 and a first shift block 612 and a second shift block 613 respectively arranged on the knob body 611, and the first shift block 612 protrudes from the second shift block 613; the first shift block 612 is used to shift the material shift rod 92 to rotate so that the limit column 93 is clamped in the arc groove 921; the second shift block 613 is used to shift the material shift rod 92 to rotate so that the limit column 93 is disengaged from the arc groove 921.

[0029] When the control and protection switch electrical appliance is turned on, the knob switch 61 in the operating mechanism 6 rotates and the first shift block 612 drives the material lever 92 to rotate so that the limit column 93 is clamped in the arc-shaped slot 921. At this time, the AC coil microswitch 8 is in a fixed state and the AC coil microswitch 8 is turned on; the knob switch 61 rotates and the second shift block 613 drives the material lever 92 to rotate so that the limit column 93 is disengaged from the arc-shaped slot 921. At this time, the AC coil microswitch 8 can rotate with the positioning column 91 as the axis, and the AC coil microswitch 8 becomes disconnected; the AC coil microswitch 8 is opened and closed by the rotation of the knob switch 61, thereby controlling the on and off of the AC coil 34, thereby improving the safety and stability of the control and protection switch electrical appliance.

[0030] Combination Figures 7 to 9 In order to realize the automatic tripping function of the control and protection switch electrical appliance in an unexpected situation, it is realized through the release connecting rod assembly 63 in the operating mechanism 6; the release connecting rod assembly 63 includes a release body 631 installed on the rectangular shell 31, a connecting rod swing arm 632 rotatably installed on the rectangular shell 31 at the middle end, a compression spring 633 acting between the rectangular shell 31 and the connecting rod swing arm 632 in a compressed state, and a tripping torsion spring 634 installed between the cam handle rod 62 and the driving part of the release body 631.

[0031] The lower pressure assembly 53 includes a lower pressure plate 531 whose one end is rotatably connected to the transmission member 5 and a reset torsion spring 532 installed between the transmission member 5 and the lower pressure plate 531. In the initial state, the reset force of the reset torsion spring 532 is smaller than the force of the compression spring 633 acting on the connecting rod swing arm 632; the other end of the lower pressure plate 531 is provided with a bending portion 533. When the control and protection switch electrical appliance is turned on, the bending part of the bending portion 533 acts on the main contact mechanism 4.

[0032] When the knob switch 61 is rotated to turn on the control and protection switch electrical appliance, one end of the connecting rod swing arm 632 always abuts against the lower pressure plate 531, causing the lower pressure plate 531 to act on the main contact mechanism 4 in a vertical state to control the connection of the main contact mechanism 4; the release body 631 is a push-pull type electromagnet release. When the control and protection switch electrical appliance is abnormal, the electromagnets in the release body 631 lose power and bounce off each other, causing its driving part to act on the other end of the connecting rod swing arm 632. At this time, the compression spring 633 is compressed under the action of the driving part of the release body 631, the connecting rod swing arm 632 rotates relative to the rectangular housing 31, and the lower pressure plate 531 is linked to disconnect the main contact mechanism 4; at the same time, the movement of the driving part of the release body 631 causes the release torsion spring 634 to drive the cam handle rod 62 to rotate and release, and the knob switch 61 resets, realizing the automatic disconnection of the control and protection switch electrical appliance by release control.

[0033] Meanwhile, to improve the safety stability and reminder function of the control and protection switch electrical appliance, a switch failure signal microswitch 10 electrically connected to the control power circuit 7 is fixedly installed on the rectangular housing 31, and the operating mechanism 6 rotates to control the opening and closing of the switch failure signal microswitch 10; when the control and protection switch electrical appliance is abnormal, the cam handle rod 62 is rotated passively, and the circumferential surface of the cam handle rod 62 acts on the switch failure signal microswitch 10 and causes it to open, thereby turning on the signal lamp electrically connected to the switch failure signal microswitch 10.

[0034] The main contact mechanism 4 includes a contactor body 41, a push rod 42 installed on the base 1, and a static contact group 43, a contact support 44, a moving contact group 45, and a contact spring 46 arranged inside the contactor body 41, and the contact support 44 slides directionally inside the contactor body 41; the moving contact group 45 is installed on the contact support 44, one end of the push rod 42 is fixedly connected to the contact support 44, and the other end thereof is arranged outside the contactor body 41; the contact spring 46 acts between the contactor body 41 and the contact support 44, and in the initial state, the moving contact group 45 is located above the static contact group 43.

[0035] When the control and protection switch electrical appliance is turned on, the lower pressing plate 531 in the lower pressing assembly 53 acts on the ejector rod 42 to compress the contact spring 46, and the moving contact group 45 is connected to the static contact group 43. To improve the safety and stability of the main contact mechanism 4 during operation, a current short-circuit release 47 is connected to the contactor body 41, and the current short-circuit release 47 is electrically connected to the control power supply circuit 7; a relief groove 421 is provided on the ejector rod 42. When the control and protection switch electrical appliance is short-circuited, the driving rod of the current short-circuit release 47 extends into the relief groove 421 and is used to limit the movement of the ejector rod 42 towards the static contact group 43, thereby restricting the downward pressure of the transmission member 5, and then preventing the attraction between the static iron core 32 and the moving iron core 33. When the control and protection switch electrical appliance is short-circuited, the operating mechanism 6 cannot remain in the on state, effectively protecting the safety of electrical equipment.

[0036] The implementation principle is as follows: The coil of the AC electromagnet is energized through the control power supply circuit 7. After the AC coil 34 is energized, the moving iron core 33 generates an electromagnetic force and moves vertically towards the static iron core 32 against the reaction force of the return spring 35 until they are attracted together. During the movement of the moving iron core 33 towards the static iron core 32, the lower pressing assembly 53 at one end of the transmission member 5 acts on the main contact mechanism 4, causing the ejector rod 42 in the main contact mechanism 4 to drive the contact support 44 and the moving contact to move downward, and the moving contact group 45 is closed with the static contact group 43. The other end of the transmission member 5 acts on the fault signal micro switch on the control power supply circuit 7 to indicate that the control and protection switch electrical appliance and its control power supply circuit 7 are normal, the main contact mechanism 4 is connected, and the main circuit is connected; at this time, the rotating operating mechanism 6 is in the on state. When the knob switch 61 rotates, it drives the feeding rod 92 to rotate, and the limit post 93 is clamped in the arc-shaped card slot 921. At this time, the AC coil micro switch 8 is in a fixed state, and the AC coil micro switch 8 is turned on; When the control power supply circuit 7 de-energizes the coil of the AC electromagnet or the external power supply suddenly cuts off, the electromagnetic force for maintaining the attraction between the moving iron core 33 and the static iron core 32 disappears. The moving iron core 33 moves upward in the direction of separating from the static iron core 32 under the reaction force of the return spring 35. At the same time, the transmission member 5 drives the lower pressing assembly 53 to move, causing the acting force on the ejector rod 42 to disappear. The contact support 44 moves upward under the reset action of the contact spring 46. At this time, the moving contact group 45 is separated from the static contact group 43, realizing the disconnection of the main circuit; When the current or voltage of the control power circuit 7 is abnormal, the electromagnets in the release body 631 lose power and bounce off each other, causing its driving part to act on one end of the link swing arm 632. The compression spring 633 is compressed under the action of the driving part of the release body 631. At the same time, the driving part of the release body 631 drives the reset torsion spring 532 to move, causing the knob switch 61 to reset. The circumferential surface of the cam handle rod 62 acts on the control switch to activate the fault signal micro switch 10 and prompts it to open, thereby causing the signal lamp electrically connected to the switch fault signal micro switch 10 to light up. The control AC coil micro switch 8 can rotate around the positioning post 91 under the action of the linkage 9. At this time, the AC coil micro switch 8 cannot be opened, and the moving iron core 33 and the static iron core 32 cannot be attracted, realizing the tripping control and the state where the switch electrical appliance cannot be turned on; at the same time, when the control and protection switch electrical appliance is short-circuited, the driving rod of the current short-circuit release 47 in the main contact mechanism 4 extends into the relief groove 421 on the ejector rod 42, which is used to limit the movement of the ejector rod 42 in the direction of the static contact group 43, thereby restricting the downward pressure of the transmission part 5, and preventing the attraction between the static iron core 32 and the moving iron core 33. When the control and protection switch electrical appliance is short-circuited, the operating mechanism 6 cannot rotate. Further, when the current or voltage of the control power circuit 7 is abnormal, the safety of the protected electrical equipment can be effectively protected. Embodiment 2

[0037] A control and protection switch electrical appliance, combined with Figure 2 、 Figures 10 to 13 , which is different from Embodiment 1 in the release link assembly 63 and the downward pressure assembly 53. In this embodiment, the release link assembly 63 includes a release body 631 installed on the rectangular housing 31, a link swing arm 632 rotatably installed at one end on the rectangular housing 31, and a compression spring 633 acting in a compressed state between the rectangular housing 31 and the link swing arm 632.

[0038] A positioning protrusion 621 is provided on the cam handle rod 62, and a positioning slot 6321 is formed on the link swing arm 632. When the knob switch 61 rotates to connect the control and protection switch electrical appliance, the compression spring 633 acts on the link swing arm 632 to urge the positioning protrusion 621 to be stuck in the positioning slot 6321. At this time, when the knob switch 61 is connected, the circumferential limit is carried out through the link swing arm 632; the release body 631 is a push-pull type electromagnet release. When the control and protection switch electrical appliance is abnormal, the electromagnets in the release body 631 lose power and bounce off each other, causing its driving part to act on the other end of the link swing arm 632. At this time, the compression spring 633 is compressed under the action of the driving part of the release body 631, the positioning protrusion 621 is disengaged from the positioning slot 6321, and the knob switch 61 resets and drives the cam handle rod 62 to rotate, realizing the automatic disconnection of the tripping control and protection switch electrical appliance.

[0039] To improve the stability of the tripping of the trip link assembly 63 in case of abnormality, a limit block 6322 is provided on the link swing arm 632, and a limit groove 311 is formed on the rectangular housing 31; the free end of the limit block 6322 is arranged in the limit groove 311 and used to limit the rotation angle of the link swing arm 632.

[0040] Meanwhile, the pressing component 53 is a U-shaped part 54 integrally provided with the cross plate 51, and the free end of the ejector rod 42 is located in the U-shaped groove of the U-shaped part 54; meanwhile, a guide groove 312 is provided on the side wall of the rectangular housing 31, and one side of the U-shaped part 54 slides directionally in the guide groove 312. The transmission part 5 is limited by the U-shaped part 54 with respect to the ejector rod 42, improving the stability of the action of the transmission part 5 on the ejector rod 42, and one side of the U-shaped part 54 slides directionally in the guide groove 312, further improving the overall stability of the transmission part 5 when sliding on the rectangular housing 31.

[0041] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A control and protection switch electrical appliance, comprising a base (1), an outer housing (11) covering the base (1), and a current transformer group (2), a permanent magnet coil mechanism (3), a main contact mechanism (4), a transmission member (5), an operating mechanism (6), and a control power circuit (7) connected to an external power supply, which are respectively installed on the base (1). The current transformer group (2) is connected to the main contact mechanism (4), and is characterized in that: The permanent magnet coil mechanism (3) includes a rectangular housing (31) mounted on a base (1), a stationary iron core (32) fixedly installed below the interior of the rectangular housing (31), a moving iron core (33) vertically and directionally slidably installed in the rectangular housing (31) and located above the stationary iron core (32), an AC coil (34) fixedly installed between the stationary iron core (32) and the moving iron core (33), and a rebound spring (35) acting between the stationary iron core (32) and the moving iron core (33); the transmission member (5) is connected to the moving iron core (33) and extends to the outside of the rectangular housing (31) at both ends, one end of the transmission member (5) is connected with a downward pressing assembly (53) and acts on the main contact mechanism (4) to control the on / off of the main contact mechanism (4), and the other end of the transmission member (5) acts on a fault signal microswitch on the control power circuit (7) to control its on / off; an AC coil microswitch (8) for controlling the on / off of the AC coil (34) is installed on the rectangular housing (31), the operating mechanism (6) is rotatably connected to the rectangular housing (31), and the operating mechanism (6) controls the opening and closing of the AC coil microswitch (8) through a linkage member (9).

2. The control and protection switch device according to claim 1, characterized in that: The linkage member (9) includes a positioning post (91) fixedly installed on the rectangular housing (31), a feeding rod (92) rotatably installed at one end on the rectangular housing (31), and a limiting post (93) fixedly installed on one side of the AC coil microswitch (8); the other side of the AC coil microswitch (8) is rotatably installed on the positioning post (91) and can rotate around the positioning post (91) as the axis; the feeding rod (92) is provided with an arc-shaped card slot (921), and the operating mechanism (6) can control the feeding rod (92) to rotate back and forth on the rectangular housing (31); when the control and protection switch electrical appliance is turned on, the limiting post (93) is limited and clamped in the arc-shaped card slot (921), and at this time the AC coil microswitch (8) is in the on state; when the control and protection switch electrical appliance is turned off, the operating mechanism (6) controls the feeding rod (92) to rotate so that the limiting post (93) disengages from the arc-shaped card slot (921), and the AC coil microswitch (8) rotates around the positioning post (91) and becomes in the off state.

3. The control and protection switch appliance according to claim 2, wherein: The operating mechanism (6) includes a knob switch (61) rotatably mounted on the outer housing (11), a cam handle rod (62) with one end rotatably mounted on the rectangular housing (31), and a tripping link assembly (63) arranged on the rectangular housing (31). The other end of the cam handle rod (62) is connected to the knob switch (61). When the control and protection switch electrical appliance is disconnected, the knob switch (61) drives the feeding rod (92) to rotate, causing the limit post (93) to disengage from the arc-shaped card slot (921). When the control and protection switch electrical appliance is turned on, the knob switch (61) drives the feeding rod (92) to rotate, causing the limit post (93) to be clamped in the arc-shaped card slot (921), and the tripping link assembly (63) limits the form of the pressing assembly (53) in the on state of the control and protection switch electrical appliance.

4. The control and protection switch device according to claim 3, characterized in that: The tripping link assembly (63) includes a tripping body (631) mounted on the rectangular housing (31), a link swing arm (632) rotatably mounted in the middle on the rectangular housing (31), a compression spring (633) acting in a compressed state between the rectangular housing (31) and the link swing arm (632), and a tripping torsion spring (634) mounted between the cam handle rod (62) and the driving part of the tripping body (631). When the control and protection switch electrical appliance is turned on, the compression spring (633) in the initial state acts on the link swing arm (632) to urge one end of the link swing arm (632) to always abut against the pressing assembly (53), so that the pressing assembly (53) acts on the main contact mechanism (4) to control the main contact mechanism (4) to be turned on. When the control and protection switch electrical appliance is abnormal, the driving part of the tripping body (631) acts on the other end of the link swing arm (632). At this time, the link swing arm (632) rotates relative to the rectangular housing (31), and the pressing assembly (53) is linked to disconnect the main contact mechanism (4). At the same time, the movement of the driving part of the tripping body (631) causes the tripping torsion spring (634) to drive the cam handle rod (62) to rotate and trip.

5. The control and protection switch device according to claim 3, characterized in that: The tripping link assembly (63) includes a tripping body (631) mounted on the rectangular housing (31), a link swing arm (632) with one end rotatably mounted on the rectangular housing (31), and a compression spring (633) acting in a compressed state between the rectangular housing (31) and the link swing arm (632). A positioning protrusion (621) is provided on the cam handle rod (62), and a positioning card slot (6321) is formed on the link swing arm (632). When the control and protection switch electrical appliance is turned on, the compression spring (633) acts on the link swing arm (632) to urge the positioning protrusion (621) to be clamped in the positioning card slot (6321). When the control and protection switch electrical appliance is abnormal, the driving part of the tripping body (631) acts on the other end of the link swing arm (632). At this time, the positioning protrusion (621) disengages from the positioning card slot (6321), causing the knob switch (61) to drive the cam handle rod (62) to rotate and trip.

6. The control and protection switch device according to claim 3, characterized in that: The knob switch (61) comprises a knob body (611) and a first shifting block (612) and a second shifting block (613) respectively arranged on the knob body (611); the first shifting block (612) protrudes from the second shifting block (613); the first shifting block (612) is used to shift the material shifting rod (92) to rotate so that the limiting column (93) is clamped in the arc-shaped clamping groove (921); and the second shifting block (613) is used to shift the material shifting rod (92) to rotate so that the limiting column (93) is clamped out of the arc-shaped clamping groove (921).

7. The control and protection switch disconnector according to claim 3, characterized in that: A switch fault signal micro switch (10) electrically connected to the control power supply circuit (7) is fixedly mounted on the rectangular housing (31); the operating mechanism (6) rotates to control the switch fault signal micro switch (10) to open and close; when the control and protection switch electrical appliance is disconnected, the cam handle (62) acts on the switch fault signal micro switch (10).

8. The control and protection switch device according to claim 1, wherein: The main contact mechanism (4) comprises a contactor body (41) mounted on a base (1), a push rod (42), and a stationary contact group (43), a contact bracket (44), a moving contact group (45) and a contact spring (46) arranged in the contactor body (41); the contact bracket (44) slides in a directional manner inside the contactor body (41); the moving contact group (45) is mounted on the contact bracket (44); one end of the push rod (42) is connected to the contact bracket (44); 44) is fixedly connected, and the other end thereof is arranged outside the contactor body (41); the contact spring (46) acts between the contactor body (41) and the contact bracket (44), and in the initial state, the moving contact group (45) is located above the static contact group (43); when the control and protection switch electrical appliance is turned on, the pressing assembly (53) acts on the top rod (42) to cause the contact spring (46) to be compressed, and the moving contact group (45) is connected with the static contact group (43).

9. The control and protection switch device according to claim 8, wherein: The pressing assembly (53) comprises a pressing plate (531) having one end rotatably connected to the transmission member (5) and a return torsion spring (532) installed between the transmission member (5) and the pressing plate (531); the other end of the pressing plate (531) is provided with a bending portion (533); when the control and protection switch electrical appliance is turned on, the bending portion of the bending portion (533) acts on the top rod (42) of the main contact mechanism (4).

10. The control and protection switch device according to claim 8, characterized in that: The contactor body (41) is connected to a current short-circuit releaser (47), and the current short-circuit releaser (47) is electrically connected to a control power supply circuit (7); a clearance groove (421) is provided on the top rod (42), and when the control and protection switch electrical appliance is short-circuited, the driving rod of the current short-circuit releaser (47) extends into the clearance groove (421) to limit the movement of the top rod (42) toward the static contact group (43).

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