A control and protection switch electrical appliance

Abstract

The present application relates to a control and protection switch electrical appliance, which includes a base, an outer shell, and a current transformer group, a permanent magnet coil mechanism, a main contact mechanism, a transmission member, an operating mechanism, and a control power supply circuit respectively installed on the base, wherein the permanent magnet coil mechanism includes a rectangular shell, a static iron core, a moving iron core, an AC coil, and a rebound spring; the transmission member is connected to the moving iron core and its two ends extend to the outside of the rectangular shell respectively, one end of the transmission member is connected to a down-pressing component and acts on the main contact mechanism to control the on and off of the main contact mechanism, and the other end of the transmission member acts on a fault signal microswitch on the control power supply circuit to control its on and off; an AC coil microswitch is installed on the rectangular shell, the operating mechanism is rotatably connected to the rectangular shell, and the operating mechanism controls the opening and closing of the AC coil microswitch through a linkage member. The present application has good stability and reliability during operation, and the switch can automatically disconnect when the external power supply is suddenly cut 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, the commonly used control and protection switch electrical appliances on the market are all horizontal structures, and the working principle of their 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 and moves horizontally toward the static iron core until they are 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 realize 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 separation 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 realize the disconnection of the main circuit.

[0004] In this 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 a 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 the closed state to the open state, it is necessary to control the power supply circuit to send a reverse magnetic force to the coil and a 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 can automatically disconnect the switch 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:

[0007] A control and protection switch electrical appliance, comprising a base, an outer shell covering the base, and a current transformer group, a permanent magnetic coil mechanism, a main contact mechanism, a transmission member, an operating mechanism, and a control power circuit of an external power supply, each of which is mounted on the base. The current transformer group is connected to the main contact mechanism. The permanent magnetic coil mechanism comprises a rectangular shell mounted on the base, a static iron core fixedly mounted at the bottom of the rectangular shell, a moving iron core vertically slidably mounted in the rectangular shell and located above the static iron core, an AC coil fixedly mounted between the static iron core and the moving iron core, and an AC coil acting on the static iron core. The transmission member is connected to the moving iron core and both ends extend to the outside of the rectangular shell respectively. One end of the transmission member is connected to the down-pressing component and acts on the main contact mechanism to control the on and off of the main contact mechanism. The other end of the transmission member acts on the fault signal microswitch on the control power supply circuit to control its on and off. An AC coil microswitch for controlling the on and off of the AC coil is installed on the rectangular shell. The operating mechanism is rotatably connected to the rectangular shell, and the operating mechanism controls the opening and closing of the AC coil microswitch through a linkage.

[0008] Preferably, the linkage includes a positioning column fixedly mounted on the rectangular shell, a material removal rod rotatably mounted on the rectangular shell at one end, and a limit column fixedly mounted on one side of the AC coil microswitch; the other side of the AC coil microswitch is rotatably mounted on the positioning column, and can rotate with the positioning column as the axis; the material removal rod is provided with an arc-shaped slot, and the operating mechanism can control the material removal rod to rotate back and forth on the rectangular shell; when the control and protection switch electrical appliance is connected, the limit column limit card is set in the arc-shaped slot, and the AC coil microswitch is in the on state; when the control and protection switch electrical appliance is disconnected, the operating mechanism controls the material removal rod to rotate so that the limit column disengages from the arc-shaped slot, and the AC coil microswitch rotates with the positioning column as the axis and becomes disconnected.

[0009] Preferably, the operating mechanism includes a knob switch that rotates on the outer shell, a cam handle rod with one end rotatably mounted on the rectangular shell, and a release connecting rod assembly arranged on the rectangular shell, and the other end of the cam handle rod is connected to the knob switch; when the control and protection switch electrical appliance is disconnected, the knob switch drives the material removal rod to rotate so that the limit column disengages from the arc-shaped slot; when the control and protection switch electrical appliance is connected, the knob switch drives the material removal rod to rotate so that the limit column is stuck in the arc-shaped slot, and the release connecting rod assembly limits the shape of the downward pressure assembly when the control and protection switch electrical appliance is connected.

[0010] Preferably, the tripper connecting rod assembly includes a tripper body installed on a rectangular shell, a connecting rod swing arm installed on the rectangular shell with a middle rotation, a compression spring acting between the rectangular shell and the connecting rod swing arm in a compressed state, and a tripping torsion spring installed between the cam handle rod and the driving part of the tripper body; a positioning protrusion is provided on the cam handle rod, and a positioning slot is provided on the connecting rod swing arm. When the control and protection switch electrical appliance is connected, 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 down-pressing assembly, so that the down-pressing assembly acts on the main contact mechanism to control the main contact mechanism to be connected; when the control and protection switch electrical appliance is abnormal, the driving part of the tripper 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 links the down-pressing assembly to disconnect the main contact mechanism; at the same time, the movement of the driving part of the tripper body causes the tripping torsion spring to drive the cam handle rod to rotate and trip.

[0011] Preferably, the tripper connecting rod assembly includes a tripper 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 provided 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 clamped in the positioning slot; when the control and protection switch electrical appliance is abnormal, the driving part of the tripper 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 trip.

[0012] 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 rod to rotate so that the limit column is clamped in the arc-shaped slot; the second shift block is used to shift the material rod to rotate so that the limit column is disengaged from the arc-shaped slot.

[0013] 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. When the control and protection switch electrical appliance is disconnected, the cam handle acts on the switch fault signal micro switch.

[0014] Preferably, the main contact mechanism includes a contactor body mounted on a base, a push rod, and a static contact group, a contact bracket, a moving contact group and a contact spring arranged in the contactor body, and the contact bracket slides directionally inside the contactor body; the moving contact group is mounted on the contact bracket, one end of the push rod is fixedly connected to the contact bracket, and the other end thereof is passed through and arranged outside the contactor body; the contact spring acts between the contactor body and the contact bracket, 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 assembly acts on the push rod to cause the contact spring to be compressed, and the moving contact group is connected to the static contact group.

[0015] Preferably, the down-pressing assembly includes a down-pressing plate rotatably connected to the transmission member at one end and a reset torsion spring installed between the transmission member and the down-pressing plate. A bending portion is provided at the other end of the down-pressing plate. When the control and protection switch electrical appliance is turned on, the bending portion of the bending portion acts on the top rod of the main contact mechanism.

[0016] Preferably, the contactor body is connected to a current short-circuit release, and the current short-circuit release is electrically connected to the control power supply circuit; a clearance groove is provided on the top rod, and when the control and protection switch electrical appliance is short-circuited, the driving rod of the current short-circuit release extends into the clearance groove to limit the movement of the top rod toward the static contact group.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] The coil of the AC electromagnet is energized through the control power circuit. After the AC coil is energized, the moving iron core generates electromagnetic force and overcomes the reaction force of the rebound spring to move vertically toward the static iron core until they are attracted together. During the movement of the moving iron core toward the static iron core, one end of the transmission member acts on the main contact mechanism through the pressing component, and the other end of the transmission member acts on the fault signal micro switch on the control power circuit, indicating that the control and protection switching electrical appliance and its control power circuit are normal, the main contact mechanism is connected, and the main circuit is connected; when the control power circuit de-energizes the coil of the AC electromagnet, or 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 upward to separate from the static iron core under the reaction force of the rebound spring. When the voltage or current in the control power circuit is abnormal, the fault signal microswitch of the control switch in the operating mechanism is touched and opened, thereby lighting up the signal light electrically connected to the fault signal microswitch of the switch. At the same time, the AC coil microswitch is controlled to be unable to be opened under the interaction of the operating mechanism and the linkage, and the moving iron core and the static iron core cannot be attracted, thereby limiting the downward pressure of the transmission part, the main contact mechanism cannot be connected, and the operating mechanism cannot be kept in the connected state, thereby realizing the trip control and the protection switch electrical appliance cannot be turned on. Further, when the current or voltage in the control power circuit is abnormal, the safety of the electrical equipment is effectively protected.

[0019] The first shift block is provided to shift the material lever to rotate so that the limit column is clamped in the arc-shaped slot, and the second shift block is used to shift the material lever to rotate so that the limit column is clamped out of the arc-shaped slot; when the control and protection switch electrical appliance is turned on, the knob switch in the operating mechanism rotates and causes the first shift block to drive the material lever to rotate so that the limit column is clamped in the arc-shaped 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 causes the second shift block to drive the material lever to rotate so that the limit column is disengaged from the arc-shaped slot. At this time, the AC coil microswitch can rotate with the positioning column as the axis, and the AC coil microswitch becomes the disconnected state; the AC coil microswitch is turned on and off by rotating the knob switch, thereby controlling the on and off of the AC coil, thereby improving the safety and stability of the control and protection switch electrical appliance;

[0020] By setting a tripper connecting rod assembly, when the knob switch is rotated to connect the control and protection switch electrical appliance 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 connection of the main contact mechanism; when the control and protection switch electrical appliance 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 links the lower pressure plate 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 electrical appliance is automatically disconnected;

[0021] By providing a tripper connecting rod assembly in the operating mechanism, when the knob switch is turned to connect the control and protection switch electrical appliance, the compression spring acts on the connecting rod swing arm to cause the positioning protrusion to be locked in the positioning slot. At this time, when the knob switch is turned on, the connecting rod swing arm is used to limit the circumference. When the control and protection switch electrical appliance is abnormal, the electromagnets in the tripper body lose power and bounce away from each other, causing its driving part to act 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, and the positioning protrusion is disengaged from the positioning slot. The knob switch is reset under the action of its own torsion spring, and drives the cam handle rod to rotate, realizing the automatic disconnection of the trip control and protection switch electrical appliance.

[0022] A micro switch for a fault signal of a switch which is electrically connected to a control power circuit is fixedly mounted on a rectangular housing. The operating mechanism rotates to open and close the micro switch for a fault signal of a control switch. When the control and protection switch electrical appliance is abnormal, the cam handle rod passively rotates. The peripheral surface of the cam handle rod acts on the micro switch for a fault signal of a control switch and causes it to open, thereby lighting up a signal light electrically connected to the micro switch for a fault signal of a control switch, thereby improving the safety, stability and warning function of the control and protection switch electrical appliance.

[0023] A current short-circuit release is connected to the contactor body, and the current short-circuit release is electrically connected to the control power 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 release extends into the clearance groove, which is used to limit the movement of the top rod toward the static contact group, and then limit the downward pressure of the transmission part and the downward pressure of the downward pressure component, thereby preventing the static iron core and the moving iron core from being attracted, so that the operating mechanism of the control and protection switch electrical appliance cannot remain in the on state when the control and protection switch electrical appliance is short-circuited, thereby effectively protecting the safety of the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of the control and protection switch electrical appliance of Example 1;

[0025] Figure 2This is a schematic structural diagram of the control and protection switch apparatus of Example 1 without the outer shell;

[0026] Figure 3 This is a cross-sectional view of the control and protection switch apparatus of Example 1, excluding the outer shell, at the knob switch;

[0027] Figure 4 This is a schematic diagram of the partial structure inside the control and protection switch electrical appliance of Example 1;

[0028] Figure 5 This is a partial structural diagram of the permanent magnetic coil mechanism, transmission component, operating mechanism, and linkage component of Example 1;

[0029] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0030] Figure 7 It is a local structure between the cam handle and the linkage member when the control and protection switch electrical appliance of Example 1 is turned on;

[0031] Figure 8 yes Figure 7 A top view of

[0032] Figure 9 This is a partial structural diagram of the main contact mechanism, permanent magnetic coil mechanism, transmission member, and pressing assembly in Example 1;

[0033] Figure 10 Schematic diagram of the partial structure of the permanent magnetic coil mechanism and the transmission member in Example 2;

[0034] Figure 11 This is a partial structural diagram of the operating mechanism of Example 2;

[0035] Figure 12 Schematic diagram of the partial structure of the permanent magnetic coil mechanism and the transmission member in Example 2;

[0036] Figure 13 It is a partial structural diagram of the main contact mechanism, permanent magnetic coil mechanism, transmission parts, and pressing components in Example 2.

[0037] Explanation of the accompanying symbols: 1. base; 11. outer shell; 2. current transformer group; 3. permanent magnet coil mechanism; 31. rectangular shell; 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. ejector rod; 421. give way groove; 43. static contact group; 44. contact bracket; 45. moving contact group; 46. contact spring; 47. current short-circuit release; 5. transmission member; 51. horizontal plate; 52. first pressure plate; 53. lower pressure assembly; 531. lower pressure plate; 532. reset torsion spring; 5 33. Bending portion; 54. U-shaped portion; 6. Operating mechanism; 61. Knob switch; 611. Knob body; 612. First shift block; 613. Second shift block; 62. Cam handle; 621. Positioning protrusion; 63. Trip unit connecting rod assembly; 631. Trip unit body; 632. Connecting rod swing arm; 6321. Positioning slot; 6322. Limit block; 633. Compression spring; 634. Trip torsion spring; 7. Control power circuit; 8. AC coil microswitch; 9. Linkage; 91. Positioning column; 92. Trip rod; 921. Arc-shaped slot; 93. Limit column; 10. Switch fault signal microswitch. DETAILED DESCRIPTION

[0038] The present application is further described in detail below with reference to the accompanying drawings.

[0039] The embodiment of the present application discloses a control and protection switch electrical appliance. Example 1

[0040] Reference Figure 1 、 Figure 2 The control and protection switch electrical appliance includes a base 1, an outer shell 11 covering the base 1, and a current transformer group 2, a permanent magnet coil mechanism 3, a main contact mechanism 4, a transmission part 5, an operating mechanism 6 and a control power circuit 7 of an external power supply respectively installed on the base 1. The current transformer group 2 is connected to the main contact mechanism 4.

[0041] Among them, the control power supply circuit 7 includes a CPU main chip and its peripheral circuits having a control power supply circuit 7, a signal conditioning and processing circuit, a control voltage sampling circuit, and a CPU, a trip output circuit, and a three-phase current sampling circuit; it should be noted that since the control power supply circuit 7, the keyboard liquid crystal display mechanism, the structure of the two-way communication interface, the current transformer group 2 and the setting method already belong to the conventional setting means in this technical field, therefore, they are no longer described in detail in this embodiment, and it should be understood that the conventional component settings and setting methods in the control and protection switch electrical appliance other than the control power supply 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.

[0042] Combine Figure 2 、 Figure 3 The permanent magnet coil mechanism 3 includes a rectangular shell 31 installed on the base 1, a static iron core 32 fixedly installed at the bottom inside the rectangular shell 31, a moving iron core 33 vertically slidably installed in the rectangular shell 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.

[0043] Combine Figures 3 to 9 The transmission member 5 includes a horizontal plate 51 and a first pressure plate 52 integrally connected to one end of the horizontal plate 51. The horizontal plate 51 is fixedly connected to the moving iron core 33 and its two ends extend to the outside of the rectangular shell 31 respectively; the first pressure plate 52 at one end of the transmission member 5 acts on the fault signal microswitch on the control power circuit 7 to control its on and off, and the other end of the transmission member 5 is connected to a downward pressure component 53 and acts on the main contact mechanism 4 to control the on and off of the main contact mechanism 4; the coil of the AC electromagnet is energized by the control power circuit 7, and the moving iron core 33 generates electromagnetic force after the AC coil 34 is energized and overcomes the reaction force of the rebound spring 35 and moves vertically toward the static iron core 32 until they are attracted together. In the process of the moving iron core 33 moving toward the static iron core 32, the downward pressure component 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 connected.

[0044] An AC coil micro switch 8 for controlling the on and 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 9 .

[0045] The operating mechanism 6 includes a knob switch 61 that rotates on the outer shell 11, a cam handle rod 62 one end of which is rotatably mounted on the rectangular shell 31, and a tripper connecting rod assembly 63 arranged on the rectangular shell 31. The other end of the cam handle rod 62 is connected to the knob switch 61, and the tripper connecting rod assembly 63 limits the shape of the downward pressure assembly 53 when the control and protection switch electrical appliance is in the on state.

[0046] Combine Figures 4 to 6 The linkage part 9 includes a positioning column 91 fixedly mounted on the rectangular shell 31, a material-moving rod 92 rotatably mounted on the rectangular shell 31 at one end, and a limit column 93 fixedly mounted on one side of the AC coil microswitch 8. The other side of the AC coil microswitch 8 is rotatably mounted on the positioning column 91 and can rotate around the positioning column 91 as the axis; the material-moving rod 92 is arranged in a V-shaped structure as a whole, and an arc-shaped card groove 921 is provided on one side of the V-shaped groove of the material-moving rod 92. The operating mechanism 6 can control the material-moving rod 92 to rotate back and forth on the rectangular shell 31.

[0047] 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 lever 92 to rotate so that the limiting column 93 is clamped in the arc-shaped slot 921; the second shift block 613 is used to shift the material lever 92 to rotate so that the limiting column 93 is disengaged from the arc-shaped slot 921.

[0048] When the control and protection switch electrical appliance is turned on, the knob switch 61 in the operating mechanism 6 rotates and causes the first shift block 612 to drive 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 causes the second shift block 613 to drive 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.

[0049] Combine Figures 7 to 9 In order to realize the automatic tripping function of the control and protection switch electrical appliance in an unexpected situation, this is achieved through the release link assembly 63 in the operating mechanism 6; the release link assembly 63 includes a release body 631 installed on the rectangular housing 31, a connecting rod swing arm 632 whose middle end is rotatably installed on the rectangular housing 31, a compression spring 633 acting between the rectangular housing 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.

[0050] The down-pressing assembly 53 includes a down-pressing 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 down-pressing plate 531. In the initial state, the reset force of the reset torsion spring 532 is less than the force of the compression spring 633 acting on the connecting rod swing arm 632; the other end of the down-pressing 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.

[0051] When the knob switch 61 is rotated to connect the control and protection switch electrical appliance, one end of the connecting rod swing arm 632 always contacts the lower pressure plate 531, so that the lower pressure plate 531 acts on the main contact mechanism 4 in a vertical state to control the main contact mechanism 4 to be connected; the tripper body 631 is a push-pull type electromagnetic tripper. When the control and protection switch electrical appliance is abnormal, the electromagnets in the tripper body 631 lose power and bounce off each other, so that its driving part acts 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 tripper body 631, and the connecting rod swing arm 632 rotates relative to the rectangular shell 31, and links the lower pressure plate 531 to disconnect the main contact mechanism 4; at the same time, the movement of the driving part of the tripper body 631 prompts the tripping torsion spring 634 to drive the cam handle rod 62 to rotate and trip, and the knob switch 61 is reset, so that the tripping control and protection switch electrical appliance is automatically disconnected.

[0052] At the same time, in order to improve the safety, stability and reminder function of the control and protection switch electrical appliances, a switch fault signal microswitch 10 electrically connected to the control power supply circuit 7 is fixedly installed on the rectangular shell 31, and the operating mechanism 6 rotates the control switch fault signal microswitch 10 to open and close; when the control and protection switch electrical appliances are abnormal, the cam handle rod 62 passively rotates, and the circumferential surface of the cam handle rod 62 acts on the control switch fault signal microswitch 10 and prompts it to open, thereby making the signal light electrically connected to the switch fault signal microswitch 10 light up.

[0053] The main contact mechanism 4 includes a contactor body 41 mounted on the base 1, a push rod 42, and a static contact group 43, a contact bracket 44, a moving contact group 45 and a contact spring 46 arranged in the contactor body 41, and the contact bracket 44 slides directionally 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 fixedly connected to the contact bracket 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 bracket 44, and in the initial state, the moving contact group 45 is located above the static contact group 43.

[0054] When the control and protection switch is connected, the down-pressing plate 531 in the down-pressing assembly 53 acts on the push 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, the contactor body 41 is connected to the current short-circuit release 47, and the current short-circuit release 47 is electrically connected to the control power circuit 7. A clearance groove 421 is formed on the push rod 42. When the control and protection switch is short-circuited, the driving rod of the current short-circuit release 47 extends into the clearance groove 421, which is used to limit the movement of the push rod 42 toward the static contact group 43, thereby limiting the downward pressure of the transmission member 5, thereby preventing the static iron core 32 and the moving iron core 33 from being attracted. When the control and protection switch is short-circuited, the operating mechanism 6 cannot remain in the on state, effectively protecting the safety of the electrical equipment.

[0055] The implementation principle is as follows: the coil of the AC electromagnet is energized by the control power circuit 7. After the AC coil 34 is energized, the moving iron core 33 generates an electromagnetic force and overcomes the reaction force of the rebound spring 35 to move vertically toward the static iron core 32 until they are attracted together. In the process of the moving iron core 33 moving toward the static iron core 32, the pressing component 53 at one end of the transmission member 5 acts on the main contact mechanism 4, so that the top rod 42 in the main contact mechanism 4 drives the contact bracket 44 and the moving contact to press down and close the moving contact group 45 and the static contact group 43. The other end of the transmission member 5 acts on the fault signal microswitch on the control power circuit 7, indicating that the control and protection switch electrical appliance and its control power circuit 7 are normal, the main contact mechanism 4 is connected, and the main circuit is connected; at this time, the rotary operating mechanism 6 is in the on state, and when the knob switch 61 is rotated, it drives the material rod 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;

[0056] When the control power circuit 7 de-energizes the coil of the AC electromagnet or the external power supply is suddenly cut off, the electromagnetic force used to keep the movable iron core 33 and the static iron core 32 attracted disappears. The movable iron core 33 moves upward in the direction of separating from the static iron core 32 under the reaction force of the rebound spring 35. At the same time, the transmission member 5 drives the pressing assembly 53 to move so that the force acting on the ejector rod 42 disappears. The contact bracket 44 moves upward under the reset action of the contact spring 46. At this time, the movable contact group 45 and the static contact group 43 are separated, and the main circuit is disconnected.

[0057] When the current or voltage of the control power supply circuit 7 is abnormal, the electromagnets in the tripper body 631 lose power and bounce off each other, causing its driving part to act on one end of the connecting rod swing arm 632. The compression spring 633 is compressed under the action of the driving part of the tripper body 631. At the same time, the driving part of the tripper body 631 is linked to the reset torsion spring 532 to move and reset the knob switch 61. The circumference of the cam handle 62 acts on the control switch fault signal micro switch 10 and causes it to open, thereby making the signal light electrically connected to the switch fault signal micro switch 10 light up, and the control AC coil micro switch 8 can rotate around the positioning column 91 as the axis under the action of the linkage part 9. The AC coil microswitch 8 cannot be opened, and the moving iron core 33 and the static iron core 32 cannot be attracted, so that the tripping control and protection 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 yield groove 421 on the top rod 42, which is used to limit the movement of the top rod 42 toward the static contact group 43, and then limit the downward pressure of the transmission member 5, which can prevent the attraction between the static iron core 32 and the moving iron core 33, and realize that the control and protection switch electrical appliance cannot be rotated when the short circuit occurs, and further effectively protects the safety of the protection electrical equipment when the current or voltage of the control power circuit 7 is abnormal. Example 2

[0058] A control and protection switch appliance, combined with Figure 2 、 Figures 10 to 13 The difference from Example 1 lies in the tripper connecting rod assembly 63 and the pressing assembly 53. In this embodiment, the tripper connecting rod assembly 63 includes a tripper body 631 mounted on the rectangular housing 31, a connecting rod swing arm 632 with one end rotatably mounted on the rectangular housing 31, and a compression spring 633 acting between the rectangular housing 31 and the connecting rod swing arm 632 in a compressed state.

[0059] A positioning protrusion 621 is provided on the cam handle rod 62, and a positioning slot 6321 is provided on the connecting rod swing arm 632. When the knob switch 61 is rotated to turn on the control and protection switch electrical appliance, the compression spring 633 acts on the connecting rod swing arm 632 to cause the positioning protrusion 621 to be clamped in the positioning slot 6321. At this time, when the knob switch 61 is turned on, it is circumferentially limited by the connecting rod swing arm 632; the release body 631 is a push-pull electromagnetic release. When the control and protection switch electrical appliance is abnormal, the electromagnets in the release body 631 lose power and bounce apart, 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 by the driving part of the release body 631, and the positioning protrusion 621 disengages from the positioning slot 6321. The knob switch 61 is reset and drives the cam handle rod 62 to rotate, realizing the automatic disconnection of the trip control and protection switch electrical appliance.

[0060] In order to improve the stability of the tripping of the tripper connecting rod assembly 63 in an abnormal situation, a limit block 6322 is provided on the connecting rod swing arm 632, and a limit slot 311 is opened on the rectangular shell 31; the free end of the limit block 6322 is arranged in the limit slot 311 to limit the rotation angle of the connecting rod swing arm 632.

[0061] At the same time, the pressing component 53 is a U-shaped portion 54 integrally provided with the horizontal plate 51, and the free end of the push rod 42 is located in the U-shaped groove of the U-shaped portion 54; at the same time, a guide groove 312 is provided on the side wall of the rectangular shell 31, and one side of the U-shaped portion 54 is directionally slid in the guide groove 312, and the transmission member 5 and the push rod 42 are limited by the U-shaped portion 54, thereby improving the stability of the transmission member 5 acting on the push rod 42, and one side of the U-shaped portion 54 is directionally slid in the guide groove 312, further improving the overall stability of the transmission member 5 when sliding on the rectangular shell 31.

[0062] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A control and protection switchgear, comprising a base (1), an outer shell (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) of an external power supply, each of which is mounted on the base (1), wherein the current transformer group (2) is connected to the main contact mechanism (4), and is characterized in that: The permanent magnetic coil mechanism (3) comprises a rectangular shell (31) mounted on a base (1), a static iron core (32) fixedly mounted at the bottom of the rectangular shell (31), a moving iron core (33) mounted in a vertical direction and slidingly mounted in the rectangular shell (31) and located above the static iron core (32), an AC coil (34) fixedly mounted 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); the transmission member (5) is connected to the moving iron core (33) and its two ends extend to the outside of the rectangular shell (31). On the side, one end of the transmission member (5) is connected to a pressing assembly (53) and acts on the main contact mechanism (4) to control the on and off of the main contact mechanism (4), and the other end of the transmission member (5) acts on the fault signal micro switch on the control power circuit (7) to control its on and off; an AC coil micro switch (8) for controlling the on and off of the AC coil (34) is installed on the rectangular housing (31), and the operating mechanism (6) is rotatably connected to the rectangular housing (31), and the operating mechanism (6) controls the on and off of the AC coil micro switch (8) through a linkage member (9); The linkage member (9) comprises a positioning column (91) fixedly mounted on the rectangular housing (31), a material-moving rod (92) rotatably mounted on the rectangular housing (31) at one end, and a limiting column (93) fixedly mounted on one side of the AC coil microswitch (8); the other side of the AC coil microswitch (8) is rotatably mounted on the positioning column (91) and can rotate around the positioning column (91) as the axis; the material-moving rod (92) is provided with an arc-shaped slot (921), and the operating mechanism (6) can control the The material-moving rod (92) rotates back and forth on the rectangular housing (31); when the control and protection switch electrical appliance is connected, the limiting post (93) is limitedly clamped in the arc-shaped clamping groove (921), and the AC coil microswitch (8) is in the open state; when the control and protection switch electrical appliance is disconnected, the operating mechanism (6) controls the material-moving rod (92) to rotate so that the limiting post (93) is disengaged from the arc-shaped clamping groove (921), and the AC coil microswitch (8) rotates with the positioning post (91) as the axis and becomes in the disconnected state.

2. The control and protection switch electrical apparatus according to claim 1, characterized in that: The operating mechanism (6) comprises a knob switch (61) that rotates on the outer shell (11), a cam handle rod (62) with one end rotatably mounted on the rectangular shell (31), and a tripper connecting rod assembly (63) arranged on the rectangular shell (31), wherein 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 material-moving rod (92) to rotate so that the limiting column (93) is disengaged from the arc-shaped slot (921); when the control and protection switch electrical appliance is connected, the knob switch (61) drives the material-moving rod (92) to rotate so that the limiting column (93) is clamped in the arc-shaped slot (921), and the tripper connecting rod assembly (63) limits the shape of the pressing assembly (53) when the control and protection switch electrical appliance is connected.

3. The control and protection switch electrical apparatus according to claim 2, characterized in that: The tripper connecting rod assembly (63) comprises a tripper body (631) mounted on a rectangular housing (31), a connecting rod swing arm (632) whose middle portion is rotatably mounted on the rectangular housing (31), a compression spring (633) acting between the rectangular housing (31) and the connecting rod swing arm (632) in a compressed state, and a tripping torsion spring (634) mounted between the cam handle (62) and the driving portion of the tripper body (631); when the control and protection switch electrical appliance is turned on, the compression spring (633) in the initial state acts on the connecting rod swing arm (632) to urge the connecting rod swing arm (632) to rotate. One end of the trip unit (632) always contacts 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 connected; when the control and protection switch electrical appliance is abnormal, the driving part of the trip unit body (631) acts on the other end of the connecting rod swing arm (632), and the connecting rod swing arm (632) rotates relative to the rectangular housing (31), and links the pressing assembly (53) to disconnect the main contact mechanism (4); at the same time, the movement of the driving part of the trip unit body (631) prompts the tripping torsion spring (634) to drive the cam handle rod (62) to rotate and trip.

4. The control and protection switch electrical apparatus according to claim 2, characterized in that: The tripper connecting rod assembly (63) comprises a tripper body (631) mounted on a rectangular housing (31), a connecting rod swing arm (632) rotatably mounted on the rectangular housing (31) at one end, and a compression spring (633) acting between the rectangular housing (31) and the connecting rod swing arm (632) in a compressed state; a positioning protrusion (621) is provided on the cam handle (62), and a positioning slot (6321) is provided on the connecting rod swing arm (632). When the control and protection switch is turned on, the tripper body (631) is turned on. When the switch is turned on, the compression spring (633) acts on the connecting rod swing arm (632) to cause the positioning protrusion (621) to be locked in the positioning slot (6321); when the control and protection switch electrical appliance is abnormal, the driving part of the release body (631) acts on the other end of the connecting rod swing arm (632), and at this time the positioning protrusion (621) is disengaged from the positioning slot (6321), causing the knob switch (61) to drive the cam handle rod (62) to rotate and release.

5. The control and protection switch electrical apparatus according to claim 2, 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); 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).

6. The control and protection switch electrical apparatus according to claim 2, characterized in that: A switch fault signal micro switch (10) electrically connected to a 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).

7. The control and protection switch electrical apparatus according to claim 1, characterized in that: The main contact mechanism (4) comprises a contactor body (41) mounted on a base (1), a push rod (42), and a static 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 directionally 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 in contact with the contact bracket ( 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 component (53) acts on the top rod (42) to cause the contact spring (46) to be compressed, and the moving contact group (45) is connected to the static contact group (43).

8. The control and protection switch electrical apparatus according to claim 7, characterized in that: The down-pressing assembly (53) comprises a down-pressing plate (531) rotatably connected to the transmission member (5) at one end, and a return torsion spring (532) installed between the transmission member (5) and the down-pressing plate (531); the other end of the down-pressing plate (531) is provided with a bent portion (533); when the control and protection switch electrical appliance is turned on, the bent portion of the bent portion (533) acts on the top rod (42) of the main contact mechanism (4).

9. The control and protection switch electrical apparatus according to claim 7, characterized in that: The contactor body (41) is connected to a current short-circuit release (47), and the current short-circuit release (47) is electrically connected to the 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 release (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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