A high voltage switch with built-in capacitor power supply device

Abstract

The object of the present invention is to provide a high-voltage switch with a built-in capacitor power extraction device, comprising an upper column shell, a lower box shell and an intermediate fixed plate made of insulating material, wherein a high-voltage path component is arranged in the upper column shell, which contains a capacitor power extraction device, and a low-voltage control component is arranged in the lower box shell, and the intermediate fixed plate is used to realize the fixation of the upper column shell and the lower box shell; the column-box type high-voltage switch described in the present invention combines the advantages of the existing pillar-type high-voltage switch and the box-type high-voltage switch, has a small size, and is easy to assemble automatically; the upper column shell and the lower box shell realize effective isolation of high voltage and low voltage, and the components in the upper column shell are insulated from each other; at the same time, space is reserved in the upper column shell to facilitate the installation of the capacitor power extraction device.

Description

Technical Field

[0001] The invention belongs to the technical field of capacitor power supply, and in particular relates to a high-voltage switch with a built-in capacitor power supply device. Background Art

[0002] The high-voltage switch (or high-voltage circuit breaker) can not only cut off or close the no-load current and load current in the high-voltage circuit, but also cut off the overload current and short-circuit current through the action of the relay protection device when a system failure occurs. It has a fairly complete arc extinguishing structure and sufficient current-breaking capacity.

[0003] Existing high-voltage switches are mainly divided into two categories: pillar-type high-voltage switches and box-type high-voltage switches.

[0004] Pillar-type high-voltage switches, such as the ZW32 high-voltage switch, are large in size. The incoming terminals, outgoing terminals or ceramic insulating sleeves they use are all large-volume accessories, which are not easy to install, occupy a large area and have a limited scope of application. When electrical signals need to be collected, only external transformers can be used, which poses a great safety hazard.

[0005] Box-type high-voltage switches, such as the ZW20 high-voltage switch, are filled with SF6 gas, which may cause leakage. Under the action of electric arc and corona, SF6 gas will decompose to produce low-fluorine compounds, which will cause damage to the insulating material. Moreover, these low-fluorine compounds are highly toxic gases and are not conducive to environmental protection.

[0006] Therefore, both the pillar-type high-voltage switch and the box-type high-voltage switch have their shortcomings, and a new type of high-voltage switch is needed that can not only realize the functions of the high-voltage switch but also overcome the shortcomings of the pillar-type high-voltage switch and the box-type high-voltage switch.

[0007] Furthermore, in order to realize the protection function of the high-voltage switch, it is usually necessary to extract the voltage signal from the high-voltage circuit, and determine whether there is no-load current and load current in the high-voltage circuit through the measurement function of the voltage sensor; however, the existing voltage sensors are generally used to measure small voltage signals. For electrical signals with large voltages, auxiliary components such as capacitor power extraction devices must be used to convert the large voltage signals into small voltage signals for effective measurement. However, due to the structural limitations and safety regulations of the existing high-voltage switches, capacitor power extraction devices cannot be effectively installed and used inside the high-voltage switch. Summary of the invention

[0008] The purpose of the present invention is to provide a high-voltage switch with a built-in capacitor power supply device, which can not only realize the functions of the high-voltage switch and overcome the shortcomings of the pillar-type high-voltage switch and the box-type high-voltage switch, but also provide a small-volume capacitor power supply device that can be arranged inside the high-voltage switch.

[0009] The technical solution of the present invention to solve the technical problem is:

[0010] A high-voltage switch with a built-in capacitor power supply device, comprising an upper column shell, a lower box shell and an intermediate fixing plate made of insulating material, wherein a high-voltage passage component is arranged in the upper column shell, a low-voltage control component is arranged in the lower box shell, and the intermediate fixing plate is used to fix the upper column shell and the lower box shell;

[0011] The high-voltage path assembly includes an incoming line assembly, an outgoing line assembly and a conductor; the incoming line assembly includes a capacitor power taking device, an incoming line rod, a high-voltage incoming line terminal and an incoming line conductor terminal; the capacitor power taking device is used to take out electrical signals from the incoming line rod, the middle part of the incoming line rod is fixedly passed through the shell wall of the upper column shell, and the upper end of the incoming line rod is fixedly electrically connected with a high-voltage incoming line terminal, and the upper end of the incoming line rod is fixedly electrically connected with an incoming line conductor terminal; the outgoing line assembly includes a high-voltage outgoing line terminal, a vacuum arc extinguishing chamber and an insulating pull rod, the high-voltage outgoing line terminal is fixedly electrically connected to the outgoing line end of the vacuum arc extinguishing chamber, a high-voltage separation and combination mechanism composed of a moving contact and a static contact is provided in the vacuum arc extinguishing chamber, and the insulating pull rod is used to separate and combine the moving contact and the static contact through mechanical action; the first end of the wire is fixedly electrically connected to the incoming line conductor terminal, and the second end of the wire is fixedly electrically connected to the incoming line end of the vacuum arc extinguishing chamber;

[0012] The low-voltage control assembly includes a control mechanism, a spring operating mechanism and a connecting rod; the control mechanism is used to drive the connecting rod to move through the spring operating mechanism, and the moving end of the connecting rod passes through the middle fixing plate and is fixedly connected to the lower end of the insulating pull rod.

[0013] The capacitor power supply device includes components A and B, wherein component B is a cavity, and component A is nested in the cavity of component B. Component A includes a power supply capacitor, a voltage sensor for detecting the voltage of the power supply capacitor, and a filling medium. The power supply capacitor and the voltage sensor are pressed into the filling medium, and the filling medium is insulated; component B is insulated and also includes a power supply wire for supplying power, the access end of the power supply wire is connected to the power supply capacitor, and the lead-out end is led out through the filling medium and component B in turn and is electrically connected to the incoming wire pole, and also includes a capacitor lower lead-out line and a sensor lower lead-out line, which are led out from the lower end through the filling medium and component B respectively and are both electrically connected to the control mechanism.

[0014] The component B includes an insulating layer, a shielding layer, and an insulating sleeve which are arranged in sequence from the inside to the outside.

[0015] The component B is a cavity with upper and lower openings, and also includes an upper cover and a lower cover for sealing the upper opening and the lower opening of the component B respectively.

[0016] The lead-out end of the lead-out wire is led out through the filling medium and the upper cover in sequence.

[0017] An insert nut is also provided inside the lower cover for fixing with external bolts.

[0018] The outer wall of the insulating sleeve is provided with an umbrella skirt.

[0019] The insulating sleeve can be a porcelain insulating sleeve or a composite insulating sleeve.

[0020] It also includes a fixed copper column, the lower end of which is fixedly arranged on the upper cover.

[0021] The upper sealing cover is a nut.

[0022] The beneficial effects of the present invention are:

[0023] The high-voltage switch with a built-in capacitor power supply device described in the present invention combines the advantages of existing pillar-type high-voltage switches and box-type high-voltage switches, is small in size, and is easy to assemble automatically; the upper column shell and the lower box shell achieve effective isolation between high voltage and low voltage, and the components in the upper column shell are insulated from each other; at the same time, space is reserved in the upper column shell to facilitate the installation of various sensors and capacitor power supply devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 It is a structural schematic diagram of the capacitor power extraction device of the present invention. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1 As shown: a high-voltage switch with a built-in capacitor power-taking device according to the present invention comprises an upper column shell 1, a lower box shell 11 and an intermediate fixing plate 9 made of insulating materials, wherein a high-voltage passage component is arranged in the upper column shell 1, a low-voltage control component is arranged in the lower box shell 11, and the intermediate fixing plate 9 is used to fix the upper column shell 1 and the lower box shell 11;

[0028] The high-voltage path assembly includes an incoming line assembly, an outgoing line assembly and a conductor 13; the incoming line assembly includes a capacitor power extraction device 12, an incoming line rod 14, a high-voltage incoming line terminal and an incoming line conductor 13 terminal; the capacitor power extraction device 12 is used to extract an electrical signal from the incoming line rod 14, the middle part of the incoming line rod 14 is fixedly passed through the shell wall of the upper column shell 1, and the upper end of the incoming line rod 14 is fixedly electrically connected with a high-voltage incoming line terminal, and the upper end of the incoming line rod 14 is fixedly electrically connected with an incoming line conductor 13 terminal; the outgoing line assembly includes a high-voltage outgoing line terminal 2, a vacuum arc extinguishing chamber 4 and an insulating pull rod 7, the high-voltage outgoing line terminal 2 is fixedly electrically connected to the outgoing line end of the vacuum arc extinguishing chamber 4, a high-voltage separation and combination mechanism composed of a moving contact and a static contact is arranged in the vacuum arc extinguishing chamber 4, and the insulating pull rod 7 is used to separate and combine the moving contact and the static contact through mechanical action; the first end of the wire 13 is fixedly electrically connected to the incoming line conductor 13 terminal, and the second end of the wire 13 is fixedly electrically connected to the incoming line end of the vacuum arc extinguishing chamber 4;

[0029] The low-voltage control assembly includes a control mechanism, a spring operating mechanism 10 and a connecting rod; the control mechanism is used to drive the connecting rod to move through the spring operating mechanism 10, and the moving end of the connecting rod passes through the intermediate fixing plate 9 and is fixedly connected to the lower end of the insulating pull rod 7.

[0030] like Figure 2 As shown, the capacitor power supply device 12 includes components A and B, wherein component B is a cavity, and component A is nested in the cavity of component B. Component A includes a power supply capacitor 121, a voltage sensor 122 for detecting the voltage of the power supply capacitor 121, and a filling medium 123. The power supply capacitor 121 and the voltage sensor 122 are injected inside the filling medium 123, and the filling medium 123 is insulated; component B is insulated and also includes a power supply line 124 for supplying power, the access end of the power supply line 124 is connected to the power supply capacitor 121, and the lead-out end is led out through the filling medium 123 and component B in turn and is electrically connected to the incoming line pole 14, and also includes a capacitor lower lead-out line 125 and a sensor lower lead-out line 126, and the capacitor lower lead-out line 125 and the sensor lower lead-out line 126 are respectively led out from the lower end through the filling medium 123 and component B and are electrically connected to the control structure.

[0031] The component B includes an insulating layer 12701, a shielding layer 12702, and an insulating sleeve 12703 which are arranged in sequence from the inside to the outside.

[0032] The component B is a cavity with upper and lower openings, and further includes an upper cover 128 and a lower cover 129 for sealing the upper opening and the lower opening of the component B respectively.

[0033] The lead-out end of the lead wire 124 is led out through the filling medium 123 and the upper cover 128 in sequence.

[0034] The lower cover 129 is also provided with an insert nut 1210 inside for fixing with external bolts.

[0035] The outer wall of the insulating sleeve 12703 is provided with an umbrella skirt 1211.

[0036] The insulating sleeve 12703 can be a porcelain insulating sleeve 12703 or a composite insulating sleeve 12703.

[0037] It also includes a fixed copper column 1212 , the lower end of which is fixedly disposed on the upper cover 128 .

[0038] The upper cover 128 is a nut.

[0039] When in use, the capacitor power supply device 12 of the present invention is placed inside the upper column shell 1, the lead-out end of the power supply line 124 is connected to the incoming line rod 14, and the capacitor lower output line 125 and the sensor lower output line 126 are connected to the FTU to collect signals. The FTU controls the spring operating mechanism 10 to drive the connecting rod to move, and then controls the on and off of the high-voltage switch through the insulating pull rod 7.

Claims

1. A high voltage switch with a built-in capacitor power supply device, characterized in that: It includes an upper column shell, a lower box shell and an intermediate fixing plate made of insulating material, wherein a high-voltage passage component is arranged in the upper column shell, a low-voltage control component is arranged in the lower box shell, and the intermediate fixing plate is used to fix the upper column shell and the lower box shell; The high-voltage path assembly includes an incoming line assembly, an outgoing line assembly and a conductor; the incoming line assembly includes a capacitor power taking device, an incoming line rod, a high-voltage incoming line terminal and an incoming line conductor terminal; the capacitor power taking device is used to take out electrical signals from the incoming line rod, the middle part of the incoming line rod is fixedly passed through the shell wall of the upper column shell, and the upper end of the incoming line rod is fixedly electrically connected with the high-voltage incoming line terminal, and the lower end of the incoming line rod is fixedly electrically connected with the incoming line conductor terminal; the outgoing line assembly includes a high-voltage outgoing line terminal, a vacuum arc extinguishing chamber and an insulating pull rod, the high-voltage outgoing line terminal is fixedly electrically connected to the outgoing line end of the vacuum arc extinguishing chamber, a high-voltage separation and combination mechanism composed of a moving contact and a static contact is provided in the vacuum arc extinguishing chamber, and the insulating pull rod is used to separate and combine the moving contact and the static contact through mechanical action; the first end of the wire is fixedly electrically connected to the incoming line conductor terminal, and the second end of the wire is fixedly electrically connected to the incoming line end of the vacuum arc extinguishing chamber; The low-voltage control assembly includes a control mechanism, a spring operating mechanism and a connecting rod; the control mechanism is used to drive the connecting rod to move through the spring operating mechanism, and the moving end of the connecting rod passes through the middle fixing plate and is fixedly connected to the lower end of the insulating pull rod.

2. A high voltage switch with a built-in capacitor power supply device according to claim 1, characterized in that: The capacitor power supply device includes components A and B, wherein component B is a cavity, and component A is nested in the cavity of component B. Component A includes a power supply capacitor, a voltage sensor for detecting the voltage of the power supply capacitor, and a filling medium. The power supply capacitor and the voltage sensor are pressed into the filling medium, and the filling medium is insulated; component B is insulated and also includes a power supply wire for supplying power, the access end of the power supply wire is connected to the power supply capacitor, and the lead-out end is led out through the filling medium and component B in turn and is electrically connected to the incoming wire pole, and also includes a capacitor lower lead-out line and a sensor lower lead-out line, which are led out from the lower end through the filling medium and component B respectively and are both electrically connected to the control mechanism.

3. A high voltage switch with a built-in capacitor power supply device according to claim 2, characterized in that: The component B includes an insulating layer, a shielding layer, and an insulating sleeve which are arranged in sequence from the inside to the outside.

4. A high voltage switch with a built-in capacitor power supply device according to claim 3, characterized in that: The component B is a cavity with upper and lower openings, and also includes an upper cover and a lower cover for sealing the upper opening and the lower opening of the component B respectively.

5. A high voltage switch with a built-in capacitor power supply device according to claim 4, characterized in that: The lead-out end of the lead-out wire is led out through the filling medium and the upper cover in sequence.

6. A high voltage switch with a built-in capacitor power supply device according to claim 5, characterized in that: An insert nut is also provided inside the lower cover for fixing with external bolts.

7. A high voltage switch with a built-in capacitor power supply device according to claim 6, characterized in that: The outer wall of the insulating sleeve is provided with an umbrella skirt.

8. A high voltage switch with a built-in capacitor power supply device according to claim 7, characterized in that: The insulating sleeve can be a porcelain insulating sleeve or a composite insulating sleeve.

9. A high voltage switch with a built-in capacitor power supply device according to claim 8, characterized in that: It also includes a fixed copper column, the lower end of which is fixedly arranged on the upper cover.

10. A high voltage switch with a built-in capacitor power supply device according to claim 9, characterized in that: The upper sealing cover is a nut.

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