All-insulation built-in isolation fracture type deep fusion circuit breaker

Abstract

The utility model relates to an all-insulation built-in isolation fracture type deep fusion circuit breaker, which is characterized in that a solid-sealed polar pole is provided with a first cavity and a second cavity, a switch conducting rod, a vacuum arc-extinguishing chamber and a switch insulation pull rod are arranged in the first cavity, and an operating mechanism and an isolation driving mechanism are arranged in a base. The switch insulation pull rod is arranged in the second cavity and is driven by an operating mechanism to act, a liftable movable conducting rod is arranged in the middle of the second cavity, an isolation insulation pull rod is arranged at the lower end of the movable conducting rod and connected with the isolation driving mechanism, the movable conducting rod is driven by the isolation driving mechanism to ascend and descend, and an upper contact is arranged at the upper end in the second cavity. The upper end of the movable conducting rod is provided with a lower contact, and the lower end of the vacuum arc-extinguishing chamber is electrically connected with the lower contact. According to the utility model, all parts including the isolation fracture are integrated in the solid-sealed polar pole, so that the design purposes of miniaturization, light weight, integration, full-performance optimization function and the like of the circuit breaker are realized.

Description

Technical Field

[0001] The utility model relates to the field of electric power equipment, in particular to a fully insulated built-in isolation break type deep fusion circuit breaker. Background Art

[0002] For three-phase pillar-type outdoor high-voltage primary and secondary integrated pole switches that adopt air insulation and vacuum arc extinguishing principles, the exposed isolation mechanism is easy to cause the power supply voltage transformer to explode due to ferromagnetic resonance, and the exposed isolation mechanism also makes the overall appearance of the circuit breaker equipment relatively bloated. For example, the Chinese utility model patent with authorization announcement number CN213242373U discloses an isolation knife switch with a self-grounding function, wherein multiple circuit breaker bodies are arranged on the mounting seat body, multiple insulators are arranged at the front end of the support frame body, and each insulator upper end is hinged with an isolation blade, the lower end of the insulation pull rod is hinged with the corresponding crank arm on the transmission shaft, and the upper end is hinged on the corresponding isolation blade, a connecting piece is provided on the circuit breaker body, and a grounding knife seat is provided in the support frame body, each insulation pull rod is driven to swing synchronously by the rotation of the transmission shaft, and the isolation blade is driven to swing by the corresponding insulation pull rod, and the isolation blade is engaged with the connecting piece on the corresponding circuit breaker body when it swings to the uppermost end, and engaged with the corresponding grounding knife seat when it swings to the lowermost end. Another example is the Chinese utility model patent with the authorization announcement number CN218866977U, which discloses a new locking structure for the ZW32-12 pole-mounted vacuum circuit breaker integrated disconnector, which is installed on one side of the pole-mounted circuit breaker and is designed with a stable and reliable locking device with a fixed rotation angle. There is no need to adjust the locking plate angle during installation, which greatly simplifies the adjustment efficiency of the disconnector and circuit breaker locking structure, ensures that the isolation break distance requirements are met, improves the stability of the disconnector operation, and makes it easier to achieve the integration requirements of the circuit breaker and the disconnector. However, the above mechanisms make the overall appearance of the circuit breaker equipment relatively bloated, and are prone to safety hazards due to ferromagnetic resonance. Utility Model Content

[0003] The purpose of the utility model is to provide a fully insulated built-in isolating break type deep fusion circuit breaker, which integrates all parts including the isolating break into a sealed pole, thereby achieving the design goals of miniaturization, lightweight, integration, and full performance optimization of the circuit breaker.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A fully insulated built-in isolating break type deep fusion circuit breaker comprises a base and a sealed pole arranged on the base, the sealed pole is provided with a first cavity and a second cavity, and the first cavity is provided with a switch conductive rod, a vacuum arc extinguishing chamber, and a switch insulating pull rod connected in sequence from top to bottom, an operating mechanism and an isolating drive mechanism are provided in the base, and the switch insulating pull rod is driven to move by the operating mechanism, a movable conductive rod which can be raised and lowered is provided in the middle of the second cavity, and an isolating insulating pull rod is provided at the lower end of the movable conductive rod and connected to the isolating drive mechanism, the movable conductive rod is driven to rise and fall by the isolating drive mechanism, an upper contact is provided in the second cavity, a lower contact which cooperates with and contacts and separates from the upper contact is provided at one end of the movable conductive rod, and the lower end of the vacuum arc extinguishing chamber is electrically connected to the lower contact.

[0006] The upper end of the switch conductive rod is connected to the external upper outlet connecting plate, the upper end of the second cavity is provided with an isolation conductive rod, and the upper contact is connected to the external lower outlet connecting plate through the isolation conductive rod.

[0007] The isolation driving mechanism includes an isolation shaft, an assist spring and an isolation separation and combination handle arranged on the outside of the base, wherein the isolation shaft is provided with a plurality of crank arms, and the isolation insulating pull rod at the lower end of the moving conductive rod is hinged to the corresponding crank arm on the isolation shaft, one end of the assist spring is arranged on the top wall of the base, and the other end is connected to the corresponding crank arm on the isolation shaft, and a handle crank arm is provided at one end of the handle shaft of the isolation separation and combination handle located in the base, and an adjustable connecting rod is provided at the free end of the handle crank arm to be hinged to the corresponding crank arm on the isolation shaft.

[0008] The isolation and separation handle is provided with an isolation and separation indicator needle which cooperates with the separation and separation indicator plate arranged on the base.

[0009] The operating mechanism is provided with a main shaft for driving the insulating pull rods of each switch, the main shaft is provided with a separation and combination pin shaft, and the separation and combination pin shaft is provided with a block at one end close to the isolation rotating shaft, and the isolation rotating shaft is provided with a U-shaped turning arm. When the circuit breaker is closed, the block at the end of the separation and combination pin shaft moves into the U-shaped mouth of the U-shaped turning arm, and when the circuit breaker is opened, the block at the end of the separation and combination pin shaft moves out of the U-shaped mouth of the U-shaped turning arm.

[0010] The adjustable connecting rod comprises a middle screw rod and connecting heads respectively arranged at both ends of the screw rod, wherein one connecting head is hinged to the handle crank arm, and the other connecting head is hinged to the corresponding crank arm on the isolation shaft.

[0011] An electronic phase current and zero-sequence current sensor is provided at the upper end of the first cavity, and the electronic phase current and zero-sequence current sensor is sleeved on the switch conductive rod. A load-side zero-sequence voltage sensor is provided on the side wall of the first cavity, and the load-side zero-sequence voltage sensor is arranged on one side of the vacuum arc extinguishing chamber. A plurality of installation accommodating holes are provided on the side wall of the lower part of the first cavity, and an energy-taking capacitor, an electronic phase voltage transformer, and an electronic zero-sequence voltage sensor are respectively arranged in the corresponding installation accommodating holes. The load-side zero-sequence voltage sensor, the energy-taking capacitor, the electronic phase voltage transformer, and the electronic zero-sequence voltage sensor are respectively connected to the switch conductive rod through lines.

[0012] An upper shed group is provided between the upper outlet connecting plate and the electronic phase current and zero-sequence current sensor.

[0013] The lower end of the vacuum interrupter is electrically connected to the lower contact through a soft connection, and a conductive clip is provided at the movable end on the lower side of the vacuum interrupter to connect with the soft connection.

[0014] A linear bearing is provided in the middle of the second cavity, and the moving conductive rod passes through the linear bearing.

[0015] The advantages and positive effects of the utility model are:

[0016] 1. The utility model integrates all parts including the isolating fracture into the sealed pole, thereby realizing the design objectives of miniaturization, lightness, integration, and full performance optimization of the circuit breaker. Compared with the vertical opening isolating knife switch, the utility model has greatly reduced the number of parts, simple structure, convenient installation, and simplified assembly process. At the same time, the sealed pole shields the influence of the external environment, improves the insulation level and anti-pollution ability, eliminates the influence of condensation, is completely maintenance-free during the service life of the product, and can provide a complete and reliable anti-misoperation function in conjunction with the circuit breaker.

[0017] 2. The utility model utilizes the lifting of the movable conductive rod to make the upper contact and the lower contact in the second cavity contact to realize the closing or separation of the isolating break to realize the opening of the isolating break, and the isolation driving mechanism that drives the lifting of the movable conductive rod operates reliably, wherein a U-mouth turning arm is provided on the isolation rotating shaft of the isolation driving mechanism to cooperate with the block at the end of the separation and combination pin shaft on the main shaft of the operating mechanism. When the circuit breaker is in the closed state, the block at the end of the separation and combination pin shaft moves into the U-shaped mouth of the U-mouth turning arm. At this time, the isolation rotating shaft cannot rotate, that is, the movable conductive rod cannot be lifted or lowered, and the isolating break cannot be operated. When the circuit breaker is in the open state, the block at the end of the separation and combination pin shaft moves out of the U-shaped mouth of the U-mouth turning arm, and at this time, the isolating break can be opened and closed.

[0018] 3. The utility model integrates electronic phase current and zero-sequence current sensors, load-side zero-sequence voltage sensors, energy-taking capacitors, electronic phase voltage transformers, electronic zero-sequence voltage sensors and isolation fractures into an integrated design in a sealed pole, which can meet all requirements of the "Professional Inspection Outline for the Access of Primary and Secondary Integrated Pole-Mounted Switches and Ring Network Boxes of the State Grid Corporation of China" for three-phase pillar-type outdoor circuit breakers.

[0019] 4. The surface of the solid-sealed pole of the utility model is integrally cast with epoxy resin. Compared with the silicone rubber umbrella skirt, the utility model is not afraid of bird pecking and causing damage to the umbrella edge, thereby affecting the insulation performance. In addition, the base shell of the utility model adopts an integrally formed high-density cast aluminum material, which is not only light in weight and stable in structure, but also has excellent anti-corrosion and waterproof performance, which can reach IP67 level and can fully protect the operation and transmission mechanism of the switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the utility model.

[0021] Figure 2 for Figure 1 Another perspective schematic diagram of the utility model in FIG.

[0022] Figure 3 for Figure 1 The II-direction cross-sectional view,

[0023] Figure 4 for Figure 3 AA section view in the figure,

[0024] Figure 5 for Figure 4 The KK section view in the figure,

[0025] Figure 6 for Figure 3 The BB section view in the figure,

[0026] Figure 7 for Figure 4 Schematic diagram of the closing state of the operating mechanism in the

[0027] Figure 8 for Figure 7 The D-direction top view in the figure,

[0028] Fig. 9 for Figure 8 In the EE view,

[0029] Fig.10 Figure 4 Schematic diagram of the opening state of the operating mechanism in the middle.

[0030] Fig.11 for Fig.10The G-direction top view in the figure,

[0031] Fig.12 for Fig.11 HH view in .

[0032] Among them, 1 is a sealed pole, 101 is a switch conductive rod, 1011 is an upper umbrella skirt group, 102 is an upper outlet connecting plate, 103 is an electronic phase current and zero-sequence current sensor, 104 is a vacuum interrupter, 105 is a load-side zero-sequence voltage sensor, 106 is a conductive clip, 107 is a soft connection, 108 is an energy-taking capacitor, 109 is an electronic phase voltage transformer, 110 is an electronic zero-sequence voltage sensor, 111 is a switch insulating pull rod, 112 is an overtravel compression spring, 113 is an adjusting head, 114 is a lower outlet connecting plate, 115 is an isolating conductive rod, 116 is an upper contact, 117 is a lower contact, 118 is a linear bearing, and 119 is a moving conductive rod. , 120 is an isolation insulating pull rod, 121 is a first cavity, 122 is a second cavity, 2 is a base, 201 is an isolation separation and combination handle, 2011 is an isolation separation and combination indicator needle, 202 is a plug, 203 is an operating separation and combination indicator needle, 204 is an energy storage handle, 205 is an operating separation and combination handle, 3 is an operating mechanism, 301 is a main shaft, 302 is a separation and combination pin shaft, 303 is a block, 4 is an isolation drive mechanism, 401 is an assist spring, 402 is an adjustable connecting rod, 403 is a handle crank arm, 404 is a first crank arm, 405 is a U-mouth crank arm, 406 is an isolation shaft, 4061 is a bearing seat, 407 is a second crank arm, and 408 is an assist crank arm. DETAILED DESCRIPTION

[0033] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0034] like Figures 1 to 12 As shown, the utility model comprises a base 2 and a sealed pole 1 arranged on the base 2. Figure 3 As shown, the sealed pole 1 is integrally cast by resin, and a first cavity 121 and a second cavity 122 are provided inside the first cavity 121, wherein a switch conductive rod 101, a vacuum arc extinguishing chamber 104, and a switch insulating rod 111 are provided inside the first cavity 121, which are sequentially connected from top to bottom, and the upper end of the switch conductive rod 101 is connected to the external upper outlet connecting plate 102, an operating mechanism 3 is provided inside the base 2, and the switch insulating rod 111 is driven by the operating mechanism 3 to actuate the internal mechanism of the vacuum arc extinguishing chamber 104 to realize the opening and closing action of the circuit breaker, which is a well-known technology in the art, wherein the working principles of the vacuum arc extinguishing chamber 104, the switch insulating rod 111, etc. can be referred to patent CN210607092U, and the operating mechanism 3 can adopt the structure in patent CN213242373U, such as Figure 3As shown, a movable conductive rod 119 that can be raised and lowered is provided in the middle of the second cavity 122, and a lower contact 117 is provided at one end of the movable conductive rod 119, an upper contact 116 is provided at one end of the second cavity 122, and the upper contact 116 is connected to an external lower outlet connecting plate 114 through an isolating conductive rod 115, an isolating driving mechanism 4 is provided in the base 2, and an isolating insulating pull rod 120 is provided at the lower end of the movable conductive rod 119 and connected to the isolating driving mechanism 4, the movable conductive rod 119 is driven to rise and fall by the isolating driving mechanism 4, thereby realizing the contact or separation of the lower contact 117 and the upper contact 116, and the lower end of the vacuum arc extinguishing chamber 104 is connected to the lower outlet connecting plate 114 through a soft connection. The upper contact 107 is electrically connected to the lower contact 117, and an isolation fracture is formed between the upper contact 116 and the lower contact 117. When the utility model is working, when the movable conductive rod 119 rises to make the upper contact 116 and the lower contact 117 contact (that is, the isolation fracture is closed), the current is input by the upper outlet connecting plate 102 and passes through the switch conductive rod 101, the vacuum arc chamber 104, the soft connection 107, the lower contact 117, the upper contact 116, and the isolation conductive rod 115 in sequence, and then output by the lower outlet connecting plate 114. When the movable conductive rod 119 is driven to descend by the isolation driving mechanism 4, the upper contact 116 and the lower contact 117 are separated to form the isolation fracture, and the electrical connection is disconnected.

[0035] like Figure 3 and Figure 6 As shown, in this embodiment, the isolation driving mechanism 4 includes an isolation shaft 406, an assisting spring 401 and an isolation separation handle 201 arranged on the outside of the base 2, wherein the isolation shaft 406 is provided with a plurality of crank arms, and the isolation insulating pull rod 120 at the lower end of the moving conductive rod 119 is hinged to the corresponding crank arm on the isolation shaft 406, one end of the assisting spring 401 is arranged on the top wall of the base 2, and the other end is connected to the corresponding crank arm on the isolation shaft 406, and the handle shaft of the isolation separation handle 201 is located at one end of the base 2. A handle crank arm 403 is provided, and an adjustable connecting rod 402 is provided at the free end of the handle crank arm 403 and is hinged to the corresponding crank arm on the isolation shaft 406, as shown in FIG. Figure 6 As shown, when the operator rotates the isolation separation handle 201, the handle arm 403 at the handle shaft end of the isolation separation handle 201 rotates accordingly and drives the isolation shaft 406 to rotate, as shown in FIG. Figure 3 As shown, the rotation of the isolation shaft 406 drives the movable conductive rod 119 to move up and down. Figure 1 As shown, the isolation and separation handle 201 is provided with an isolation and separation indicator needle 2011 which cooperates with the separation and separation indicator plate provided on the base 2 to assist in indicating the separation and separation state.

[0036] In addition, in this embodiment, the operating mechanism 3 can adopt the structure of patent CN213242373U, and as Figure 7 and Fig.10 As shown, the operating mechanism 3 includes a main shaft 301 for driving each circuit breaker to open and close synchronously (each switch insulation pull rod 111 moves synchronously), and the main shaft 301 is driven by Figure 7 Center C and Fig.10 The state change of the connecting rod assembly shown at F in the middle realizes left and right movement, thereby driving the circuit breaker to open and close. Figure 3 and Figures 7 to 12 As shown, the main shaft 301 is provided with a vertical separation pin shaft 302, and the separation pin shaft 302 is provided with a stopper 303 at one end close to the isolation shaft 406, and the isolation shaft 406 is provided with a U-shaped turning arm 405 that cooperates with the stopper 303, wherein as shown Figures 7 to 9 As shown in FIG. 1 , when the circuit breaker is in the closed state, the stopper 303 at the end of the separation pin shaft 302 will move into the U-shaped opening of the U-shaped opening arm 405. At this time, the isolation shaft 406 cannot rotate, that is, the movable conductive rod 119 cannot be raised or lowered. At this time, the isolation break cannot be operated. Figures 10-12 As shown, when the circuit breaker is in the open state, the stopper 303 at the end of the opening and closing pin shaft 302 will move out of the U-shaped opening of the U-opening arm 405, and the isolating break can be opened and closed at this time.

[0037] like Figures 3 to 5As shown, in this embodiment, an electronic phase current and zero-sequence current sensor 103 is provided at the upper end of the first cavity 121, and the electronic phase current and zero-sequence current sensor 103 is sleeved on the switch conductive rod 101, a load-side zero-sequence voltage sensor 105 is provided on the side wall of the first cavity 121, and the load-side zero-sequence voltage sensor 105 is arranged on one side of the vacuum arc extinguishing chamber 104, a plurality of installation accommodating holes are provided on the side wall of the lower part of the first cavity 121, and an energy-taking capacitor 108, an electronic phase voltage transformer 109, and an electronic zero-sequence voltage sensor 110 are respectively arranged in the corresponding installation accommodating holes, and the load-side zero-sequence voltage sensor 105, the energy-taking capacitor 108, the electronic phase voltage transformer 109, and the electronic zero-sequence voltage sensor 110 are respectively connected to the switch conductive rod 101 through lines built into the sealed pole 1. When the utility model is working, when the primary current is input from the upper outlet connecting plate 102 and passes through the switch conductive rod 101, the vacuum interrupter 104, the soft connection 107, the lower contact 117, the upper contact 116, the isolation conductive rod 115 and the lower outlet connecting plate 114 in sequence, the electronic phase current and zero-sequence current sensor 103 senses the secondary sampling current, and the load side zero-sequence voltage sensor 105 and the energy-taking capacitor 108, the electronic phase voltage transformer 109, and the electronic zero-sequence voltage sensor 110 sense the secondary sampling current through the switch conductive rod 101. The sampling voltage and control voltage are obtained. A controller is provided in the base 2. A plug 202 is provided on the side wall of the base 2. The control voltage supplies power to the controller through the plug 202. The controller then controls the closing and opening actions of the circuit breaker. The sampled voltage sensor signal obtained can be used for display, prepayment, and line loss calculation to the controller through the plug 202. It can also be combined with the sampled current obtained by the electronic phase current and zero-sequence current sensor 103 to realize the fault recording function, so that the circuit breaker has intelligent control functions such as local line selection. The electronic phase current and zero-sequence current sensor 103, the load-side zero-sequence voltage sensor 105, the energy-taking capacitor 108, the electronic phase voltage transformer 109, the electronic zero-sequence voltage sensor 110, and the controller are all well-known technologies in the art and are commercially available products. For example, the same sensor elements as the phase / zero-sequence current sensor and the phase / zero-sequence current sensor in the CN210607092U patent can be used. In this embodiment, the plug 202 adopts a 26-pin open circuit prevention aviation plug, which is a commercially available product.

[0038] The utility model highly integrates the above-mentioned electronic phase current and zero-sequence current sensor 103, load-side zero-sequence voltage sensor 105, energy-taking capacitor 108, electronic phase voltage transformer 109, electronic zero-sequence voltage sensor 110 and isolation fracture part into the sealed pole 1, thereby achieving the design objectives of miniaturization, lightweight, integration and full performance optimization of the circuit breaker.

[0039] like Figure 4 As shown, in this embodiment, an upper shed group 1011 is provided between the upper outlet connecting plate 102 and the electronic phase current and zero-sequence current sensor 103. The upper shed group 1011 is provided with two resin sheds, one small and one large, as intervals from top to bottom, which can increase the primary arc creepage distance and prevent surface discharge from causing external breakdown of the electronic current and zero-sequence current sensor coil. In addition, Figures 1 to 3 As shown, an umbrella skirt is normally provided on the outer side of the sealed pole 1 .

[0040] In this embodiment, the switch conductive rod 101 and the isolation conductive rod 115 are both made of red copper, wherein the lower end of the switch conductive rod 101 passes through the electronic phase current and zero-sequence current sensor 103 and is installed at the static end on the upper side of the vacuum arc extinguishing chamber 104, and the primary power supply signals of the load side zero-sequence voltage sensor 105, the energy extraction capacitor 108, the electronic phase voltage transformer 109, and the electronic zero-sequence voltage sensor 110 are all taken from the switch conductive rod 101, that is, the upper side of the electronic phase current and zero-sequence current sensor 103.

[0041] In this embodiment, the signals collected by the electronic phase current and zero-sequence current sensor 103, the load-side zero-sequence voltage sensor 105, the electronic phase voltage transformer 109, and the electronic zero-sequence voltage sensor 110 are all led out from the lower end of the sealed pole 1 through the built-in shielded soft wire.

[0042] like Figure 3 As shown, in this embodiment, the movable end of the lower side of the vacuum interrupter 104 is provided with a conductive clip 106 to connect with the soft connection 107 to ensure the conductive contact area. The soft connection 107 is made of copper material and silver-plated. The upper end of the switch insulating rod 111 is threadedly connected to the movable end of the vacuum interrupter 104 and is provided with a clamping nut and a flat washer to tightly press the soft connection 107 pressure plate on the movable end of the vacuum interrupter 104 and the surface of the conductive clip 106.

[0043] like Figure 3 As shown, a linear bearing 118 is provided in the middle of the second cavity 122, and the movable conductive rod 119 passes through the linear bearing 118 to achieve smooth lifting and lowering. In addition, in this embodiment, the main body of the movable conductive rod 119 is made of chromium copper QCr0.5 material, the surface hardness is not less than HB90 and the surface is electroplated with silver, while ensuring the conductivity, it also ensures good surface wear resistance. The upper end of the movable conductive rod 119 is made of copper tungsten ceramic alloy to ensure that the rod head will not be burned when the circuit breaker is opened and the arc is pulled by brute force when the line is energized.

[0044] like Figure 3 and Figure 6As shown, in this embodiment, the isolation shaft 406 is provided with a first crank arm 404, a second crank arm 407 and an assist crank arm 408, wherein the lower end of the isolation insulating pull rod 120 at the lower end of the movable conductive rod 119 is hinged to the free end of the first crank arm 404, the adjustable connecting rod 402 at the free end of the handle crank arm 403 is hinged to the second crank arm 407, and the assist spring 401 is hinged to the assist crank arm 408, as shown in FIG. Figure 6 As shown, the first crank arm 404, the second crank arm 407 and the assist crank arm 408 are staggered in sequence along the axial direction of the isolation shaft 406 to avoid mutual influence. In addition, in this embodiment, the adjustable connecting rod 402 can adopt a telescopic adjustment structure to change the movement stroke of the movable conductive rod 119 in the second cavity 122 as needed, such as Figure 3 As shown, in this embodiment, the adjustable connecting rod 402 includes a middle screw rod and connecting heads respectively arranged at both ends of the screw rod, and the two connecting heads are respectively hinged to the handle crank arm 403 and the second crank arm 407. By screwing the two connecting heads, the length of the entire adjustable connecting rod 402 can be changed.

[0045] In this embodiment, the base 2 shell is made of high-density cast aluminum shell with high strength and corrosion resistance. Figure 2 As shown, the base 2 is provided with an operating opening and closing handle 205, an energy storage handle 204 and an operating opening and closing indicator needle 203 used in conjunction with the operating mechanism 3 on the side away from the isolation opening and closing handle 201, which is a well-known technology in the art. Figure 3 As shown, a bearing seat 4061 is provided in the base 2 to support the isolation shaft 406 to rotate.

[0046] The working principle of the utility model is:

[0047] When the utility model is working, when the moving conductive rod 119 rises to make the upper contact 116 and the lower contact 117 contact (that is, the isolating fracture is closed), the current is input by the upper outlet connecting plate 102 and passes through the switch conductive rod 101, the vacuum arc chamber 104, the soft connection 107, the lower contact 117, the upper contact 116, and the isolating conductive rod 115 in sequence, and then output by the lower outlet connecting plate 114. When the moving conductive rod 119 is driven to descend by the isolating driving mechanism 4, the upper contact 116 and the lower contact 117 are separated to form the isolating fracture, and the electrical connection is disconnected. In the process that the primary current is input from the upper outlet connecting plate 102 and passes through the switch conductive rod 101, the vacuum interrupter 104, the flexible connection 107, the lower contact 117, the upper contact 116, the isolation conductive rod 115 and the lower outlet connecting plate 114 in sequence, the electronic phase current and zero-sequence current sensor 103 senses the secondary sampling current, and the load side zero-sequence voltage sensor 105 and the energy-taking capacitor 108, the electronic phase voltage transformer 109, and the electronic zero-sequence voltage sensor 110 obtain the sampling current through the switch conductive rod 101. Voltage and control voltage, a controller is arranged in the base 2, a plug 202 is arranged on the side wall of the base 2, and the control voltage supplies power to the controller through the plug 202, and then the controller controls the closing and opening actions of the circuit breaker, and the sampled voltage sensor signal obtained can be used for display, prepayment, and line loss calculation of the controller through the plug 202, and can be incorporated into the fault recording function together with the sampled current obtained by the electronic phase current and zero-sequence current sensor 103, so that the circuit breaker has intelligent control functions such as local line selection.

[0048] The utility model highly integrates the above-mentioned electronic phase current and zero-sequence current sensor 103, load-side zero-sequence voltage sensor 105, energy-taking capacitor 108, electronic phase voltage transformer 109, electronic zero-sequence voltage sensor 110 and isolation fracture part into the solid-sealed pole 1, thereby achieving the design objectives of miniaturization, lightness, integration, and full performance optimization of the circuit breaker. In an application example of the utility model, the spacing between the solid-sealed poles 1 of each phase is reduced from 340mm to 250mm, realizing a truly miniaturized design.

Claims

1. A fully insulated built-in isolation break type deep fusion circuit breaker, characterized in that: The invention comprises a base (2) and a sealed pole (1) arranged on the base (2), the sealed pole (1) being provided with a first cavity (121) and a second cavity (122), and the first cavity (121) being provided with a switch conductive rod (101), a vacuum interrupter (104), and a switch insulating pull rod (111) connected in sequence from top to bottom, an operating mechanism (3) and an isolation driving mechanism (4) being provided in the base (2), and the switch insulating pull rod (111) being driven by the operating mechanism (3), and the second cavity (122) being provided with a switch conductive rod (101), a vacuum interrupter (104), and a switch insulating pull rod (111) being connected in sequence from top to bottom. A movable conductive rod (119) that can be raised and lowered is provided in the middle, and an isolating insulating pull rod (120) is provided at the lower end of the movable conductive rod (119) and is connected to the isolating driving mechanism (4). The movable conductive rod (119) is driven to rise and fall by the isolating driving mechanism (4). An upper contact (116) is provided inside the second cavity (122), and a lower contact (117) that cooperates with and contacts and separates from the upper contact (116) is provided at one end of the movable conductive rod (119), and the lower end of the vacuum arc extinguishing chamber (104) is electrically connected to the lower contact (117).

2. The fully insulated internally isolated break type deep fusion circuit breaker according to claim 1 is characterized in that: The upper end of the switch conductive rod (101) is connected to an external upper outlet connecting plate (102), an isolation conductive rod (115) is provided at the upper end of the second cavity (122), and the upper contact (116) is connected to an external lower outlet connecting plate (114) via the isolation conductive rod (115).

3. The fully insulated built-in isolation break type deep fusion circuit breaker according to claim 1 is characterized in that: The isolation driving mechanism (4) comprises an isolation rotating shaft (406), an assisting spring (401) and an isolation separation handle (201) arranged on the outside of the base (2), wherein the isolation rotating shaft (406) is provided with a plurality of crank arms, and the isolation insulating pull rod (120) at the lower end of the moving conductive rod (119) is hinged to the corresponding crank arm on the isolation rotating shaft (406), one end of the assisting spring (401) is arranged on the top wall of the base (2), and the other end is connected to the corresponding crank arm on the isolation rotating shaft (406), and the handle shaft of the isolation separation handle (201) is provided with a handle crank arm (403) at one end located inside the base (2), and the free end of the handle crank arm (403) is provided with an adjustable connecting rod (402) hinged to the corresponding crank arm on the isolation rotating shaft (406).

4. The fully insulated internally isolated break type deep fusion circuit breaker according to claim 3 is characterized in that: The isolation and separation handle (201) is provided with an isolation and separation indicator needle (2011) which cooperates with the separation and separation indicator plate provided on the base (2).

5. The fully insulated built-in isolation break type deep fusion circuit breaker according to claim 3 is characterized in that: The operating mechanism (3) is provided with a main shaft (301) for driving the insulating pull rods (111) of each switch to move. The main shaft (301) is provided with a separation and combination pin shaft (302), and a stopper (303) is provided at one end of the separation and combination pin shaft (302) close to the isolation rotating shaft (406). A U-shaped opening arm (405) is provided on the isolation rotating shaft (406). When the circuit breaker is closed, the stopper (303) at the end of the separation and combination pin shaft (302) moves into the U-shaped opening of the U-shaped opening arm (405). When the circuit breaker is opened, the stopper (303) at the end of the separation and combination pin shaft (302) moves out of the U-shaped opening of the U-shaped opening arm (405).

6. The fully insulated internally isolated break type deep fusion circuit breaker according to claim 3 is characterized in that: The adjustable connecting rod (402) comprises a central screw rod and connecting heads respectively arranged at both ends of the screw rod, wherein one connecting head is hinged to the handle crank arm (403), and the other connecting head is hinged to the corresponding crank arm on the isolation shaft (406).

7. The fully insulated internally isolated break type deep fusion circuit breaker according to claim 1 is characterized in that: An electronic phase current and zero-sequence current sensor (103) is provided at the upper end of the first cavity (121), and the electronic phase current and zero-sequence current sensor (103) is sleeved on the switch conductive rod (101); a load-side zero-sequence voltage sensor (105) is provided on the side wall of the first cavity (121), and the load-side zero-sequence voltage sensor (105) is arranged on one side of the vacuum arc extinguishing chamber (104); a plurality of installation accommodating holes are provided on the side wall of the lower part of the first cavity (121), and an energy-collecting capacitor (108), an electronic phase voltage transformer (109), and an electronic zero-sequence voltage sensor (110) are respectively arranged in corresponding installation accommodating holes; the load-side zero-sequence voltage sensor (105), the energy-collecting capacitor (108), the electronic phase voltage transformer (109), and the electronic zero-sequence voltage sensor (110) are respectively connected to the switch conductive rod (101) through lines.

8. The fully insulated internally isolated break type deep fusion circuit breaker according to claim 7 is characterized in that: The upper end of the switch conductive rod (101) is connected to an external upper outlet connecting plate (102), and an upper shed group (1011) is provided between the upper outlet connecting plate (102) and the electronic phase current and zero-sequence current sensor (103).

9. The fully insulated internally isolated break type deep fusion circuit breaker according to claim 1, characterized in that: The lower end of the vacuum interrupter (104) is electrically connected to the lower contact (117) via a soft connection (107), and a conductive clip (106) is provided at the movable end on the lower side of the vacuum interrupter (104) and connected to the soft connection (107).

10. The fully insulated internal isolation break type deep fusion circuit breaker according to claim 1, characterized in that: A linear bearing (118) is provided in the middle of the second cavity (122), and the moving conductive rod (119) passes through the linear bearing (118).

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