Intelligent measuring plastic shell type circuit breaker

Abstract

The application belongs to the technical field of circuit breakers, and discloses an intelligent measurement plastic shell type circuit breaker, which comprises a shell serving as a protective structure of the whole shell type circuit breaker, a switch connected to the inside of the shell and used for opening and closing of a circuit, an operating handle connected to the switch and used for operating the switch, and a middle positioning assembly comprising a positioning arc-shaped plate, a connecting frame, a cylinder, an insertion rod, an inclined plate and a lifting plate. The positioning arc-shaped plate is provided in a total number of two, is connected to the inside of the shell and is symmetrically arranged along the center line of the switch. The lifting plate is used for locking a spring force balance point in the middle of the positioning arc-shaped plate, and the operation torque drops in a cliff-like manner when the lifting plate is disassembled, so that the disassembly difficulty of the operating handle is reduced, the connecting structure is limited, and the problem that the structure inside the circuit breaker is damaged due to impact force caused by sudden release of the operating handle after the operating handle is disassembled is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of circuit breakers, and particularly relates to an intelligent measurement plastic shell type circuit breaker. BACKGROUND

[0002] With the continuous improvement of industrial automation and informatization level, the demand for power equipment in the power industry is increasing, especially in the fields of smart grid, new energy and industrial production line, higher requirements for the intelligence, efficiency and reliability of power equipment are put forward. As an important part of low-voltage electrical appliances, plastic shell type circuit breakers are widely used in various power systems, and bear the key tasks of protecting circuits, preventing overload and short circuit;

[0003] The intelligent measurement plastic shell type circuit breaker is a new form of technology evolution, which integrates high-precision data acquisition, Internet of Things communication, edge computing and other advanced technologies, not only realizes the circuit protection function of traditional circuit breakers, but also has core advantages such as real-time energy consumption monitoring, fault pre-diagnosis and remote control. Such products have an irreplaceable role in intelligent power grid user side power distribution and industrial production line energy management;

[0004] Although the intelligent measurement plastic shell type circuit breaker has shown significant advantages in the intelligent management of user side power distribution, the existing technology still has the following defects to be solved:

[0005] The handle disassembly depends on the end point position operation (ON / OFF gear), but this position needs to overcome the maximum spring counterforce, resulting in too large operation torque, increasing maintenance time and labor cost, and the sudden release of spring force causes mechanical damage to internal measurement elements, affecting precision. SUMMARY

[0006] The application proposes the following technical scheme to solve the problem that in the prior art, the handle disassembly depends on the end point position operation (ON / OFF gear), but this position needs to overcome the maximum spring counterforce, resulting in too large operation torque, increasing maintenance time and labor cost, and the sudden release of spring force causes mechanical damage to internal measurement elements, affecting precision.

[0007] An intelligent measurement plastic shell type circuit breaker, comprising: a shell serving as a protective structure of the whole shell type circuit breaker;

[0008] A switch connected to the inside of the shell for opening and closing the circuit;

[0009] An operating handle connected to the switch for operating the switch;

[0010] The middle positioning assembly comprises a positioning arc-shaped plate, a connecting frame, a cylinder, an insertion rod, an inclined plate and a lifting plate.

[0011] Positioning arc-shaped plate, total quantity is two, is connected to the inside of the shell and is arranged symmetrically along the center line of the switch;

[0012] Connecting frame, connected to the outside of the switch and sleeved on the outside of the operating handle;

[0013] Cylinder, connected to both ends of the connecting frame and located in the inside of the positioning arc-shaped plate;

[0014] Insertion rod, connected to the inside of the cylinder and the connecting frame and inserted into the inside of the operating handle;

[0015] Inclined plate, connected to the inside of the positioning arc-shaped plate;

[0016] Lifting plate, connected to the end of the positioning arc-shaped plate;

[0017] The operating handle drives the cylinder to rotate in the positioning arc-shaped plate through the insertion rod and the connecting frame, and enters the middle part of the positioning arc-shaped plate after being combined with the lifting plate, and the inclined plate is combined with the insertion rod after the operating handle is moved vertically in the positioning arc-shaped plate, so that the insertion rod and the operating handle are separated.

[0018] As a preferred embodiment of the above technical solution, the switch is composed of a fixed structure and a rotating structure, the fixed structure is fixedly connected with the shell, the rotating structure is rotatably connected to the inside of the fixed structure, the outside of the rotating structure of the switch is symmetrically provided with a wave piece, and the top end surface of the wave piece is combined with the bottom end surface of the connecting frame.

[0019] As a preferred embodiment of the above technical solution, a spring piece is embeddedly installed in the inner wall of the cylinder, a connecting plate is fixedly connected to the bottom end of the insertion rod, and one end of the connecting plate is fixedly connected with the spring piece.

[0020] As a preferred embodiment of the above technical solution, a guide groove is arranged in the inside of the positioning arc-shaped plate, the guide groove is composed of an arc-shaped groove and a U-shaped groove, and the U-shaped groove is located in the middle part of the arc-shaped groove.

[0021] As a preferred embodiment of the above technical solution, a blocking piece is movably connected to the inside of the guide groove at the top end of the positioning arc-shaped plate, the blocking piece supports the cylinder to prevent the cylinder from entering the U-shaped groove of the guide groove.

[0022] As a preferred embodiment of the above technical solution, the blocking piece comprises a lower blocking block, a concave plate and an upper blocking block.

[0023] Lower blocking block, connected to the lower part of the U-shaped groove of the guide groove;

[0024] The upper blocking block is connected to the upper part of the U-shaped groove of the guide groove.

[0025] The concave plate is connected to the lower blocking block and the upper blocking block.

[0026] As a preferred embodiment of the above technical solution, the lower blocking block is connected with a driving structure at one end surface, and the driving structure comprises:

[0027] The piston rod is connected to the lower blocking block.

[0028] The sleeve is connected to the piston rod and the lower blocking block.

[0029] The flow distribution plate is connected to the sleeve.

[0030] The movable sleeve is connected to the positioning arc-shaped plate, and the lifting plate is vertically movably connected to the inside of the movable sleeve.

[0031] As a preferred embodiment of the above technical solution, the movable sleeve is symmetrically provided with a clamping strip at the top end of the outside, the lifting plate is provided with a groove at the outside, and one end of the clamping strip is located in the groove.

[0032] As a preferred embodiment of the above technical solution, the lower blocking block and the upper blocking block are movably connected to the positioning arc-shaped plate, and the cylindrical hole and the top end of the insertion rod are both provided with a rectangular hole.

[0033] The present application has the following advantages:

[0034] The lifting plate is used to lock the spring force balance point in the middle of the positioning arc-shaped plate, and the operation torque drops sharply when disassembling, thereby reducing the disassembly difficulty of the operating handle, limiting the connecting structure, preventing the operating handle from being suddenly released after disassembly due to the spring force, and causing the internal structure of the circuit breaker to be damaged due to impact force.

[0035] (2) The electronic area is isolated by the connecting frame, the operation path of the insertion rod is guided to exit radially and horizontally by the inclined plate, the handle disassembly is completed externally, physical contact with the internal measurement module is completely eliminated, and the operation is simple. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 A structure schematic diagram of an intelligent measurement plastic shell type circuit breaker in Example 1 is shown.

[0037] Figure 2 A structure schematic diagram of a switch in Example 1 is shown.

[0038] Figure 3 A mounting structure schematic diagram of an operating handle in Example 1 is shown.

[0039] Figure 4The figure shows the schematic diagram of the installation structure of the cylinder in Example 1.

[0040] Figure 5 The figure shows the schematic diagram of the installation structure of the insertion rod in Example 1.

[0041] Figure 6 The figure shows the schematic diagram of the structure of the positioning arc plate in Example 1.

[0042] Figure 7 The figure shows the schematic diagram of the structure of the inclined plate in Example 1.

[0043] Figure 8 The figure shows Figure 7 The schematic diagram of the structure of the A area in the middle.

[0044] Figure 9 The figure shows the schematic diagram of the structure of the barrier in Example 1.

[0045] Figure 10 The figure shows the actual picture of a smart measurement plastic shell type circuit breaker in Example 1.

[0046] In the figure: 1, shell; 2, switch; 3, operation handle; 4, positioning arc plate; 51, wave piece; 52, connecting frame; 53, cylinder; 54, spring piece; 55, connecting plate; 56, insertion rod; 57, plastic strip; 61, guide groove; 62, inclined plate; 63, barrier; 631, lower barrier block; 632, concave plate; 633, upper barrier block; 64, piston rod; 65, sleeve; 66, shunt plate; 67, movable sleeve; 68, lifting plate; 69, clamping strip. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with the embodiments. EMBODIMENT

[0048] The present application provides a smart measurement plastic shell type circuit breaker, like Figures 1 to 10As shown, it comprises: a shell 1, a switch 2, an operating handle 3 and a middle positioning assembly; the shell 1 is the protective structure of the overall shell-type circuit breaker; the switch 2 is connected to the inside of the shell 1 and is used for the opening and closing of the circuit; the operating handle 3 is connected to the switch 2 and is used for operating the switch 2; the middle positioning assembly comprises: a positioning arc-shaped plate 4, a connecting frame 52, a cylinder 53, an insertion rod 56, an inclined plate 62 and a lifting plate 68; the positioning arc-shaped plate 4 is provided in a total of two numbers, is connected to the inside of the shell 1 and is symmetrically arranged along the center line of the switch 2; the connecting frame 52 is connected to the outside of the switch 2 and is sleeved on the outside of the operating handle 3; the cylinder 53 is connected to both ends of the connecting frame 52 and is located in the inside of the positioning arc-shaped plate 4; the insertion rod 56 is connected to the inside of the cylinder 53 and the connecting frame 52 and is inserted into the inside of the operating handle 3; the inclined plate 62 is connected to the inside of the positioning arc-shaped plate 4; the lifting plate 68 is connected to the end of the positioning arc-shaped plate 4; the operating handle 3 drives the cylinder 53 to rotate in the positioning arc-shaped plate 4 through the insertion rod 56 and the connecting frame 52, and after being attached to the lifting plate 68, enters into the middle part of the positioning arc-shaped plate 4; after the operating handle 3 is vertically moved in the positioning arc-shaped plate 4 through the insertion rod 56 and the connecting frame 52, it is attached to the inclined plate 62; the cooperation of the inclined plate 62 and the insertion rod 56 makes the insertion rod 56 and the operating handle 3 separate.

[0049] The handle disassembly needs to frequently intervene in the internal circuit, which is easy to cause the loosening of the measurement module connector or signal interference, reduces the data reliability, at the same time, the handle disassembly relies on the end position operation (ON / OFF gear), but the position needs to overcome the maximum spring counterforce, which leads to the excessive operation torque, increases the maintenance time and labor cost, and the sudden release of the spring force causes the mechanical damage of the internal measurement element, affects the precision problem;

[0050] In the present application, the whole process of disassembling the operating handle 3 is completed outside the shell 1, without intervention in the internal circuit, and the separation is realized by using the intermediate low counterforce gear, the operation torque is reduced, thereby improving the disassembly efficiency, and effectively avoiding the problem of mechanical damage of the internal elements of the circuit breaker caused by the release of the spring force.

[0051] In use, the operating handle 3 drives the cylinder 53 to rotate in the positioning arc-shaped plate 4 through the insertion rod 56 and the connecting frame 52, at this time, when the operating handle 3 drives the cylinder 53 to rotate and is attached to the lifting plate 68, the operating handle 3 is pulled, the operating handle 3 vertically moves and drives the cylinder 53 to vertically enter into the inside of the positioning arc-shaped plate 4 through the insertion rod 56 and the connecting frame 52, and is attached to the inclined surface of the inclined plate 62, and after the inclined surface attachment, the insertion rod 56 is driven to move outward, at this time, the insertion rod 56 is separated along the cylinder 53 and the operating handle 3, then the operating handle 3 is pulled, and the operating handle 3 and the connecting frame 52 are separated.

[0052] Specific, the inside of the shell 1 is provided with a switch 2 by screw, the switch 2 is combined by fixed structure and rotating structure, wherein the fixed structure is fixedly connected between the shell 1, the rotating structure is rotatably connected in the fixed structure (the above belongs to the prior art, not process elaboration here), the rotating structure outside of the switch 2 is provided with wave piece 51 symmetrically, the top end surface of the wave piece 51 is connected with the connecting frame 52, the inner wall of the connecting frame 52 is provided as a wave surface, the outer side of the operating handle 3 is integrally formed with a plastic strip 57 corresponding to the wave surface position, the connecting frame 52 is slidably connected to the outer side of the rotating structure of the switch 2, the connecting frame 52 is symmetrically welded with a cylinder 53 at both end surfaces, the cylinder 53 is slidably connected with an insertion rod 56 inside, the outer side of the operating handle 3 is provided with a positioning hole corresponding to the end surface of the insertion rod 56, the insertion rod 56 is clamped and mounted between the two insertion rods 56 inside the connecting frame 52, the top end of the insertion rod 56 is provided as an inclined surface close to the operating handle 3, the outer side of the cylinder 53 is provided with a positioning arc plate 4, the positioning arc plate 4 is mounted in the inside of the shell 1 through the screw, the positioning arc plate 4 is slidably connected with a lifting plate 68 between opposite surfaces, the positioning arc plate 4 is clamped and mounted with an inclined plate 62 inside at the top end of the insertion rod 56, the end surface of the inclined plate 62 away from the operating handle 3 is provided as an inclined surface.

[0053] As shown in Figure 4 , Figure 5 , since the insertion rod 56 needs to be reset after moving horizontally, to prevent the insertion rod 56 from being unable to reset after moving horizontally, causing the structure to stop running, therefore, the inner wall of the cylinder 53 is embedded with a spring piece 54 (the spring piece 54 specifically belongs to a spring telescopic rod), the bottom end of the insertion rod 56 is fixedly connected with a connecting plate 55, and the connecting plate 55 is fixedly connected between one end and the spring piece 54.

[0054] In use, since the insertion rod 56 is in contact with the inclined plate 62 when it rises, at this time, under the action of the inclined surface of the inclined plate 62, the insertion rod 56 moves towards the inner wall of the shell 1, at this time, the insertion rod 56 drives the spring piece 54 to move through the connecting plate 55, thereby causing the spring piece 54 to stretch, at this time, the insertion rod 56 is separated from the operating handle 3 when moving, thereby completing the disassembly between the insertion rod 56 and the operating handle 3.

[0055] Specifically, the bottom end of the insertion rod 56 is welded with a connecting plate 55, one end of the connecting plate 55 is embedded with a spring piece 54, the fixed end of the spring piece 54 is embedded in the inside of the cylinder 53, the top end of the cylinder 53 and the insertion rod 56 are both provided with a rectangular hole, and the inclined plate 62 is located inside the rectangular hole and abuts against the top end edge of the rectangular hole of the insertion rod 56.

[0056] As shown in Figure 2 , Figure 6 , Figure 7 , and Figure 9As shown, in order to ensure that the cylinder 53 moves along the predetermined position inside the positioning arc-shaped plate 4, and to prevent the cylinder 53 from being stuck, a guide groove 61 is arranged inside the positioning arc-shaped plate 4, which is combined by an arc-shaped groove and a U-shaped groove, and the U-shaped groove is located in the middle of the arc-shaped groove. A blocking piece 63 is movably connected to the top end of the guide groove 61 inside the positioning arc-shaped plate 4, which supports the cylinder 53 and prevents it from entering the U-shaped groove of the guide groove 61.

[0057] In use, the blocking piece 63 is pushed to move along the inside of the positioning arc-shaped plate 4 and enter the bottom end of the cylinder 53, so as to fill the U-shaped groove area of the guide groove 61, so that the cylinder 53 can only move along the arc-shaped groove inside the guide groove 61.

[0058] Specifically, the guide groove 61 is arranged inside the positioning arc-shaped plate 4, which is combined by an arc-shaped groove and a U-shaped groove, and the U-shaped groove is located in the middle of the arc-shaped groove. An upper blocking block 633 is slidably connected to the upper part of the U-shaped groove of the guide groove 61 inside the positioning arc-shaped plate 4, and a lower blocking block 631 is slidably connected to the lower part of the U-shaped groove of the guide groove 61 inside the positioning arc-shaped plate 4. A concave plate 632 is bonded between one end face of the lower blocking block 631 and the upper blocking block 633.

[0059] As shown in Figure 2 , Figure 4 and Figure 7 , the lower blocking block 631 and the upper blocking block 633 block the cylinder 53, but when the cylinder 53 needs to be stored, the positions of the lower blocking block 631 and the upper blocking block 633 need to be adjusted so that the cylinder 53 can move vertically along the U-shaped groove of the guide groove 61. Therefore, a driving structure is connected to one end face of the lower blocking block 631, which includes a piston rod 64, a sleeve 65, a flow distribution plate 66, and a movable sleeve 67. The piston rod 64 is connected to the lower blocking block 631. The sleeve 65 is connected to the lower blocking block 631 through the piston rod 64. The flow distribution plate 66 is connected to the sleeve 65. The movable sleeve 67 is connected to the positioning arc-shaped plate 4. A lifting plate 68 is vertically movably connected to the inside of the movable sleeve 67.

[0060] In use, the lifting plate 68 is pulled to generate negative pressure in the movable sleeve 67 when it moves, which is then transmitted to the inside of the sleeve 65 through the pipeline and the flow distribution plate 66, so that negative pressure is generated in the inside of the sleeve 65. The piston rod 64 is adsorbed in the negative pressure process, which drives the lower blocking block 631 to move after being adsorbed. The lower blocking block 631 moves synchronously to drive the upper blocking block 633 to move, which makes the upper blocking block 633 and the lower blocking block 631 unable to block the cylinder 53.

[0061] Specifically, the lower blocking block 631 is embedded with the piston rod 64 at one end away from the operating handle 3, the piston rod 64 is externally sleeved with the sleeve 65, the sleeve 65 is clamped at one end with the shunt plate 66, the shunt plate 66 is connected at both ends with the movable sleeve 67 through the pipeline, the movable sleeve 67 is fixedly installed at one end face of the positioning arc-shaped plate 4, the lifting plate 68 is vertically movably connected inside the movable sleeve 67, the lifting plate 68 is T-shaped in shape, a sealing ring is sleeved outside the largest outer diameter at the bottom end of the lifting plate 68, the sealing ring is in close contact with the inner wall of the movable sleeve 67, the clamping strips 69 are symmetrically bonded at the top end outside the movable sleeve 67, grooves are formed on the outer side of the lifting plate 68, one end of the clamping strips 69 is located inside the grooves, and the frictional resistance between the lifting plate 68 and the movable sleeve 67 is increased.

[0062] Working principle: when the device is actually used, the personnel pull the lifting plate 68, at this time the lifting plate 68 drives the corresponding clamping strip 69 to deform, so that the lifting plate 68 moves, and the other group of lifting plates 68 cannot produce displacement between the movable sleeve 67 through the action of the grooves and the clamping strips 69 because the clamping strips 69 are not deformed by external force, resulting in that the lifting plate 68 moves to produce negative pressure inside the movable sleeve 67, at this time the negative pressure produces the gas inside the sleeve 65 through the pipeline and the shunt plate 66, at this time the sleeve 65 is in a state of negative pressure, the piston rod 64 is adsorbed by the negative pressure, so that the piston rod 64 moves, the piston rod 64 moves to drive the lower blocking block 631 to move, the lower blocking block 631 moves to drive the upper blocking block 633 to move at the same time, at this time the upper blocking block 633 and the lower blocking block 631 cannot block the cylinder 53;

[0063] Then personnel up and down swing handle 3, handle 3 drive switch 2 rotating structure inside the fixed structure rotation, at this time the handle 3 rotation and one end of the lifting plate 68 surface contact, then pull the handle 3, handle 3 through the insertion rod 56 synchronous drive connection frame 52 and cylinder 53 in the U-shaped groove inside the guide slot vertical movement, at this time, the inclined plate 62 along the rectangular hole and the insertion rod 56 contact, and through the inclined surface of the inclined plate 62 under the action of, make the insertion rod 56 to the shell 1 inner wall movement, resulting in the insertion rod 56 through the connecting plate 55 drive spring 54 movement, so as to cause the spring 54 stretch, at this time, the insertion rod 56 and the handle 3 separate, thus completing the insertion rod 56 and the handle 3 between the disassembly, then continue to pull the handle 3, make the handle 3 plastic strip 57 and the connection frame 52 wave surface separation, and at this time the connection frame 52 set in the movable structure outside the switch 2, at the same time on the connection frame 52 exert a torsional force (rotating structure and fixed structure between the torsional spring, this is the existing structure, not do much elaboration here), at this time the connection frame 52 on the cylinder 53 exert a pressure, and due to the action of the U-shaped groove, at this time cause the connection frame 52 and cylinder 53 position can not be changed;

[0064] And need to install the handle 3 process, at this time the handle 3 is inserted into the connection frame 52 inside, while driving the connection frame 52 down, at this time the connection frame 52 drive cylinder 53 into the U-shaped groove of the lower part of the guide slot 61, resulting in the connection frame 52 on the wave piece 51 abutment, make the wave piece 51 compression, because the cylinder 53 movement makes the inclined plate 62 and the insertion rod 56 separate, at this time in the tension of the spring 54 under the action of the insertion rod 56 reset, and continue to press down the handle 3, at this time the handle 3 plastic strip 57 in the connection frame 52 wave surface movement, when the handle 3 and the insertion rod 56 inclined surface fit, at this time under the action of the pressure makes the insertion rod 56 move, the insertion rod 56 move drive spring 54 stretch, when the handle 3 and the switch 2 fit, at this time the spring 54 tension drive insertion rod 56 inserted into the positioning hole of the handle 3, then release the handle 3, at this time in the wave piece 51 under the action of the connection frame 52 reset, the connection frame 52 drive cylinder 53 into the arc groove inside the guide slot 61, then personnel press the lifting plate 68, at this time the lifting plate 68 into the movable sleeve 67 inside, and make the gas inside the movable sleeve 67 along the pipeline, flow distribution plate 66 into the sleeve 65 inside, so as to push the piston rod 64 movement, the piston rod 64 movement drive barrier 63 into the cylinder 53 top and bottom, while when the lifting plate 68 can't block the cylinder 53, at this time under the action of the switch 2 drive connection frame 52 movement, the connection frame 52 move drive cylinder 53 in the arc groove inside the guide slot 61, while drive the handle 3 swing.

[0065] The above examples are only used to illustrate the technical solutions of the present application, rather than limiting them.

Claims

1. An intelligent measuring plastic housing type circuit breaker characterized by, The utility model relates to a kind of integrated circuit breaker, including: Housing (1), as the protective structure of integrated circuit breaker whole; Switch (2), connect in the inside of the housing (1), for the opening and closing of circuit; Operating handle (3), connect in the switch (2), for operating switch (2); Middle positioning assembly includes: positioning arc plate (4), connecting frame (52), cylinder (53), insertion rod (56), inclined plate (62) and lifting plate (68); Positioning arc plate (4), total number is set to two, connect in the inside of the housing (1) and along the center line of switch (2) symmetrically set; Connecting frame (52), connect in the outside of the switch (2) and set in the outside of operating handle (3); Cylinder (53), connect in the both ends of the connecting frame (52) and be located in the inside of the positioning arc plate (4); Insertion rod (56), connect in the inside of the cylinder (53) and the connecting frame (52), and pass into to the inside of the operating handle (3); Inclined plate (62), connect in the inside of the positioning arc plate (4); Lifting plate (68), connect in the end of the positioning arc plate (4); The operating handle (3) is driven by the insertion rod (56) and the connecting frame (52) to rotate the cylinder (53) in the positioning arc plate (4), and after being attached with the lifting plate (68), it enters to the middle of the positioning arc plate (4), the operating handle (3) is attached with the inclined plate (62) after the vertical movement in the positioning arc plate (4) by the insertion rod (56) and the connecting frame (52), the cooperation of the inclined plate (62) and the insertion rod (56) makes the insertion rod (56) and the operating handle (3) separate.

2. The intelligent molded plastic case circuit breaker of claim 1, wherein, The switch (2) is combined by fixed structure and rotating structure, wherein the fixed structure is fixedly connected with the housing (1), the rotating structure is rotatably connected in the fixed structure, and the outer side of the rotating structure of the switch (2) is symmetrically provided with a wave piece (51), the top end surface of the wave piece (51) and the bottom end surface of the connecting frame (52) are attached to each other.

3. The intelligent, metering, plastic housed circuit breaker of claim 2 wherein, The inner wall of the cylinder (53) is embedded with a spring piece (54), the bottom end of the insertion rod (56) is fixedly connected with a connecting plate (55), and one end of the connecting plate (55) is fixedly connected with the spring piece (54).

4. The intelligent molded plastic case circuit breaker of claim 2 wherein, The inside of the positioning arc plate (4) is provided with a guide groove (61), and the guide groove (61) is combined by an arc groove and a U-shaped groove, wherein the U-shaped groove is located in the middle of the arc groove.

5. The intelligent, metering, plastic housed circuit breaker of claim 2 wherein, The top end of the positioning arc plate (4) is movably connected with a blocking piece (63) in the inside of the guide groove (61), the blocking piece (63) supports the cylinder (53), and prevents the cylinder (53) from entering the inside of the U-shaped groove of the guide groove (61).

6. The intelligent, metering, plastic housed circuit breaker of claim 5 wherein, The blocking piece (63) includes a lower blocking block (631), a concave plate (632) and an upper blocking block (633). ​ ​ A concave plate (632) is connected to the lower barrier block (631) and the upper barrier block (633).

7. The intelligent, metering, plastic housed circuit breaker of claim 6 wherein, One end surface of the lower barrier block (631) is connected with a driving structure, and the driving structure comprises: A piston rod (64) is connected to the lower barrier block (631); A sleeve (65) is connected through the piston rod (64) and the lower barrier block (631); A flow distribution plate (66) is connected to the sleeve (65); A movable sleeve (67) is connected to the positioning arc-shaped plate (4), and a lifting plate (68) is vertically movably connected to the inside of the movable sleeve (67).

8. The intelligent, metering, plastic housed circuit breaker of claim 7 wherein, Symmetrical clamping strips (69) are arranged at the top of the outside of the movable sleeve (67), and the lifting plate (68) is provided with a groove on the outside.

9. The intelligent, metering, plastic housed circuit breaker of claim 8 wherein, The lower barrier block (631) and the upper barrier block (633) are both movably connected to the positioning arc-shaped plate (4), and the cylindrical body (53) and the insertion rod (56) are both provided with a rectangular hole at the top.

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