CN219554415U - Rotary and direct-acting combined air-compressing type environment-friendly gas load switch cabinet - Google Patents

Abstract

The utility model relates to a rotary and direct-acting combined air-compressing environment-friendly gas load switch cabinet, which comprises a sealed air chamber, a cable chamber and a mechanism control chamber, wherein the sealed air chamber comprises an air box, a pressure relief device and a three-phase three-station combined switch arranged in the air box, and the air box is of a full-sealing structure and is filled with environment-friendly insulating gas; any three-phase three-position combined switch includes inflator type movable contact seat and piston type movable contact, fixed contact, ground connection fixed contact and turning arm of inflator type structure, movable contact seat one end is fixed, turning arm first end and the contact end both sides of movable contact are connected with the connecting rod mode, operating mechanism passes through the transmission shaft to be connected turning arm second end, drive the turning arm is rotatory while, drives the movable contact is in movable contact seat makes rectilinear motion, realizes the combined floodgate, separating brake and the ground connection operation of three-phase three-position combined switch. The connecting rod combination has the beneficial effects of simple structure and convenient operation based on the connecting rod combination of the turning arm rotation and the direct motion of the air compressing cylinder.

Description

Rotary and direct-acting combined air-compressing type environment-friendly gas load switch cabinet

[ field of technology ]

The utility model relates to the technical field of power distribution appliances, in particular to a rotary and direct-acting combined compressed air type environment-friendly gas load switch cabinet.

[ background Art ]

The distribution switch (cabinet) widely used at present comprises a load switch (cabinet), a combined electrical appliance (cabinet), a breaker (cabinet) and the like, and SF is adopted in order to improve the insulation and breaking performance ₆ (Sulfur hexafluoride) gas as insulating and breaking medium by SF ₆ The high-voltage switch cabinet has excellent insulating and arc extinguishing performance, adopts a fully-sealed and fully-insulating mode, ensures that the insulation and the disconnection are not influenced by the environment, has small volume, is simple to install and use, is economical and reliable compared with a conventional switch cabinet, and is widely applied to a medium-voltage distribution system and a user side. But SF ₆ Is an artificial synthetic gas with strong greenhouse effect, the greenhouse effect is 23900 times of CO2 (carbon dioxide), the synthetic gas is difficult to participate in the circulation in the natural world, the duration time in the atmosphere is up to 3200 years, and the long-term use and emission have serious consequences.

For this reason, efforts are being made worldwide to find SF ₆ But this goal has not been ideal so far; meanwhile, other solutions are actively carried out, such as a traditional gas production, gas compression or combined arc extinguishing mode, or a solid insulation, normal pressure air insulation load switch (cabinet) and the like are adopted, and as an environment-friendly gas insulation charging cabinet, a technical route and a structural mode of nitrogen, dry air or other environment-friendly gas insulation and vacuum opening and closing units are adopted, and the problems are also brought, such as that the gas production and gas compression are large in size space requirement and are unfavorable for sealing environment application, and electric arc decomposition products can influence the electric life; the epoxy resin adopted by the solid insulating cabinet is a material which is difficult to degrade, and the waste epoxy resin is treated and degraded after a large amount of useWill become an environmental protection problem; the normal-pressure air insulation is not fully sealed in practice, and is still affected by condensation and air pollution to different degrees after long-term operation; although the mode of the environment-friendly gas insulation and vacuum opening and closing unit is reasonable, the SF is commonly used in the current structure ₆ The breaker cabinet structure mode of the gas insulation and vacuum opening and closing unit, namely, the disconnecting switch (or the three-station switch) adopts a knife switch mode, and is independently separated from the vacuum opening and closing unit, and the operating mechanisms are respectively provided, so that the structure of the load switch (cabinet) is similar to that of a breaker (cabinet), even the breaker (cabinet) is used as the load switch (cabinet), and the disconnecting switch (or the three-station switch) is generally in the knife switch mode, thereby being not beneficial to optimizing and reducing the volume of an electric field and improving the dynamic and thermal tolerance level, and being repeated in structure function, complex in operation and high in cost, and influencing the popularization and application of the breaker (cabinet) in the field of power distribution and new energy.

The utility model combines the rotary and direct-acting combination with the compressed air type deionization grid, and shares a set of comprehensive arc extinguishing technology of separating the moving contact, the main contact and the arc contact, thereby making technical improvement on the environment-friendly gas load switch cabinet.

[ utility model ]

The utility model aims to provide an environment-friendly gas load switch cabinet based on a connecting rod combination of crank arm rotation and direct motion of a gas cylinder, which has the advantages of simple structure, convenient operation and low cost.

In order to achieve the aim, the technical scheme adopted by the utility model is that the rotary and direct-acting combined air-compressing type environment-friendly gas load switch cabinet comprises a sealed air chamber, a cable chamber and a mechanism control chamber, wherein the sealed air chamber comprises an air box, a pressure relief device arranged outside the air box and a three-phase three-station combined switch arranged in the air box, and the air box is of a full-sealed structure and is filled with environment-friendly insulating gas; the cable chamber comprises a cable sleeve for cable connection; the mechanism control room comprises an operating mechanism for electrical and mechanical control and interlocking; the three-phase three-station combined switch is connected with the bus through the bus sleeve to realize expansion of the bus between cabinets, and is connected with the cable sleeve through the connecting conductor to realize cable connection; any three-phase three-position combined switch comprises an air cylinder type movable contact seat, a piston type movable contact, a fixed contact, a grounding fixed contact and a crank arm, wherein one end of the movable contact seat is fixed, the first end of the crank arm is connected with two sides of a contact end of the movable contact in a connecting rod mode, an operating mechanism is connected with the second end of the crank arm through a transmission shaft and drives the crank arm to rotate and simultaneously drives the movable contact to do linear motion in the movable contact seat, so that the movable contact and the fixed contact are controlled to be combined and separated, and the movable contact and the grounding fixed contact are controlled to be combined and separated, so that the switching-on, switching-off and grounding operation of the three-phase three-position combined switch are realized.

Further, the moving contact comprises a contact tube, a honeycomb hole-shaped moving arc contact fixed at one end of the contact tube, a nozzle, a crank arm seat and a piston fixed at the other end of the contact tube; the static contact comprises a static main contact, a static contact spring, a sharp rod-shaped static arc contact, a buffer pad arranged on the front surface of the static arc contact and a deionization grid arranged on the back surface of the static arc contact; the static arc contact and the static main contact are coaxially fixed on the wiring copper bar, the static arc contact is higher than the static main contact in the axial direction, the static main contact is of a cup-shaped cylinder structure, the cup bottom is fixed with the wiring copper bar, the cup mouth is a petal contact, and under the action of tightening stress of the static contact spring, sliding electric contact is formed with the moving contact; the contact tube, the movable arc contact, the nozzle, the piston and the crank arm seat are coaxially fixed, the crank arm seat is rotationally connected with the first end of the crank arm through two axises which are symmetrically arranged left and right, and the movable arc contact is fixed in the contact tube and axially higher than the contact tube but lower than the nozzle; the piston type moving contact and the fixed contact are in time sharing, the fixed main contact is separated from the contact tube firstly, the static arc contact is separated from the moving arc contact later, the arc is extinguished through the nozzle and the deionization grid, and the piston type moving contact and the fixed contact are in time sharing, the static arc contact is inserted into the moving arc contact earlier, the contact tube is inserted into the fixed main contact later, and the impact is buffered through the nozzle and the buffer pad.

Further, any three-phase three-station combined switch further comprises a metal underframe, two insulating support plates, an insulating seat and a grounding short circuit copper bar; the inflator type movable contact seat and the piston type movable contact of the air compressing cylinder structure are fixed in the middle of the metal underframe by the insulating supporting plate, and the transmission shaft penetrates through the second end of the crank arm together with the shaft hole of the metal underframe to drive the crank arm to rotate; the static contact is fixed on the upper side of the metal chassis through the insulating seat, the static arc contact is lower than the outer edge bell jar of the insulating seat, the static contact is placed in the outer edge bell jar of the insulating seat, and the deionization grid is installed in the insulating seat; the grounding static contact and the grounding short circuit copper bar are directly fixed on the lower side of the metal chassis together; the turning arm rotates to enable the moving contact to be in a closing position when in contact with the fixed contact, the turning arm rotates to enable the moving contact to be in a grounding position when in contact with the grounding fixed contact, and the turning arm rotates to enable the turning arm and the air compressing cylinder structure to be in a straight line and to be in a separating position.

Further, the movable contact seat comprises an air cylinder, a fixed seat, a busbar, a drainage row, a movable contact tube, a contact spring, a cylinder and a spring; the movable contact tube is of a cylindrical structure, one end of the movable contact tube is fixed in the air cylinder, and the other end of the movable contact tube is made into a petal contact to form sliding electric contact with the movable contact under the action of tightening stress of the contact spring; the piston slides up and down in the air cylinder and the movable contact tube to form an air compressing cylinder structure, and the air in the air cylinder is compressed to blow out an electric arc through the nozzle when the air cylinder is opened, and buffer impact when the air cylinder is closed; the inflator is made of insulating materials and consists of a large cylinder and a small cylinder, the two axes of the large cylinder and the small cylinder are orthogonal, the small cylinder and the cylinder are coaxially fixed and rotate along with the cylinder, one end of the large cylinder is connected with the movable contact tube, and the end face of the other end of the large cylinder is closed; the movable contact tube takes the cylinders at two sides as rotating shafts, the springs are arranged between concave holes of the cylinders and the bus bars, so that the movable contact tube and the bus bars at two sides form rotary electric contact through the cylinders and the springs, and meanwhile, the movable contact tube and the contact tube form linear sliding electric contact, so that the movable contact rotates by taking the cylinders at two sides as shafts, and the movable contact tube moves linearly as a guide to form a conductive loop.

Preferably, the fixed seat is provided with a closing limit limiting the closing action of the moving contact and the fixed contact and a grounding limit limiting the grounding action of the moving contact and the grounding fixed contact.

Preferably, the ends of the static arc contact and the moving arc contact are made of arc-resistant materials; the deionization grid consists of a plurality of bent steel plates and a filter screen, wherein the bent steel plates are arranged in parallel, a plurality of turbulence punching holes are arranged on the bent steel plates, the turbulence punching holes are insulated from each other and keep an air gap distance, and the filter screen is a metal net with grid density and is fixed on the uppermost surface of the deionization grid; and honeycomb vent holes are arranged at the joint parts of the insulating base, the wiring copper bar and the fixed main contact and are used for guiding high-temperature arc gas to the deionization grid for cooling and filtering.

Preferably, the moving contact, the moving arc contact, the static arc contact, the grounding static contact and the moving contact tube all adopt cylindrical, cylindrical and round head structures and combinations, and the electric contact modes are coaxial smooth electric contact modes; the insulating support plate, the fixing seat and the insulating seat are cast by solid insulating materials and are integrated.

Preferably, the grounding static contact comprises a grounding static main contact, a grounding static contact spring, a pin-shaped grounding static arc contact and a grounding buffer pad arranged on the front surface of the static arc contact; the grounding static arc contact and the grounding static main contact are coaxially fixed on the grounding short circuit copper bar, the grounding static arc contact is higher than the grounding static main contact in the axial direction, the grounding static main contact is of a cup-shaped cylinder structure, the cup bottom is fixed with the grounding short circuit copper bar, the cup mouth is a petal contact, and sliding electric contact is formed with the moving contact under the action of tightening stress of the grounding static contact spring.

Preferably, the method comprises the steps of,

when the movable contact starts to move from the closing position under the drive of the crank arm, on one hand, the movable contact and the movable contact tube rotate together by taking the cylinders at two sides as shafts, on the other hand, the movable contact and the movable contact tube move relatively and linearly, meanwhile, the static arc contact blocks the nozzle at the starting stage of opening, the piston pre-compresses gas in the inflator until the nozzle is separated from the static arc contact and after the nozzle is separated, the pre-compressed gas and the piston blow out an electric arc together with the compressed gas which moves continuously and is separated along with the movable contact through the nozzle, and the gas is separated continuously and quickly along with the movable contact and the static contact, and finally reaches and stays at the separating position;

when the moving contact starts to move from the split position under the drive of the crank arm, on one hand, the moving contact rotates and moves directly and is quickly close to the fixed contact, and after the fixed arc contact is inserted into the nozzle, the nozzle is blocked, so that the piston compresses gas in the air cylinder to buffer the closing impact of the moving contact, and the moving contact smoothly reaches and stays at the closed position under the combined limit of the buffer pad and the closing limit.

When the movable contact starts to move in a separating mode under the driving of the crank arm from the position, on one hand, the movable contact and the movable contact tube rotate together by taking the cylinders at two sides as shafts, on the other hand, the movable contact and the movable contact tube move relatively in a straight line, meanwhile, the grounding static arc contact blocks the nozzle at the starting stage of separating the gate, the piston pre-compresses gas in the air cylinder until the nozzle and the grounding static arc contact are separated and separated, and the movable contact and the grounding static arc contact are continuously and rapidly separated along with the continuous rapid separation of the movable contact and the grounding static contact, and finally reach and stay at the separating position;

when the moving contact starts to act from the split position under the drive of the crank arm, on one hand, the moving contact rotates and moves directly and is quickly close to the grounding static contact, when the grounding static arc contact is inserted into the nozzle, the nozzle is blocked, so that the piston compresses gas in the air cylinder to buffer the closing impact of the moving contact, and the moving contact smoothly reaches and stays at the ground position under the joint restriction of the buffer pad and the grounding limit.

Preferably, the grounding fixed contact is arranged on the upper side of the metal chassis, and the grounding fixed contact is arranged on the lower side of the metal chassis, or only the fixed contact is arranged, or only the grounding fixed contact is arranged; the bus sleeve is of an inner cone shape, is arranged on the inner upper side surface of the sealed air chamber and realizes connection and expansion of buses between the switch cabinets through a bus connector; or the bus sleeve is externally conical, is arranged outside the top of the sealed air chamber and realizes connection and expansion of buses among the switch cabinets through the insulating buses.

The rotary and direct-acting combined compressed air type environment-friendly gas load switch cabinet has the following beneficial effects: the combined switch consists of a rotary and direct-acting combination, a load switch and a grounding switch, wherein the load switch and the grounding switch are combined with an air compression type deionization grid, and share a set of moving contacts, and the main contact and the arc contact are separated to carry out comprehensive arc extinction by using the deionization grid; the operating mechanism drives the movable contact to rotate and linearly move through the transmission shaft and the crank arm, forms the on-off of the load switch with the fixed contact, forms the on-off of the ground switch with the ground fixed contact, realizes the on-off (isolation) and grounding functions of the load switch cabinet, thereby realizing the environmental protection and the electric service life of the power distribution switch cabinet in a small space, simplifying the structure and the operation through the function combination, improving the reliability of the product and reducing the cost of the product.

[ description of the drawings ]

Fig. 1 is a three-dimensional perspective view of a rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet.

Fig. 2 is a left side view of the concealed seal air chamber 1, the cable chamber 2 and the left side plate of the mechanism control chamber 3 of the rotary and direct-acting combined air-compressing environment-friendly gas load switch cabinet.

FIG. 3 is a sectional view of a rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet A-A.

Fig. 4 is a partial enlarged view of a rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet I.

Fig. 5 is a partial enlarged view of a rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet II.

Fig. 6 is an enlarged view of part of a rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet III.

Fig. 7 is a schematic diagram of a closing state of the rotary and direct-acting combined compressed air type environment-friendly gas load switch cabinet after the rear plate of the sealed gas chamber 1 is hidden.

Fig. 8 is a schematic diagram of a rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet in a brake-separating state after a rear plate of a sealed gas chamber 1 is hidden.

Fig. 9 is a schematic diagram of a grounding state of the rotary and direct-acting combined compressed air type environment-friendly gas load switch cabinet after hiding the rear plate of the sealed gas chamber 1.

Reference numerals and components referred to in the drawings are as follows: 1. the device comprises a sealing air chamber, 2, a cable chamber, 3, a mechanism control chamber, 4, an air box, 5, a pressure relief device, 6, a combined switch, 601, a load switch, 602, a grounding switch, 7, a cable sleeve, 8, an operating mechanism, 9, a bus, 10, a connecting row, 11, a bus sleeve, 12, a connecting conductor, 13, a transmission shaft, 14, a crank arm, 21, a metal underframe, 22, a movable contact seat, 23, a movable contact, 24, an insulating support plate, 25, an insulating seat, 26, a fixed contact, 27, a grounding fixed contact, 28, a grounding short copper bar, 31, a fixed seat, 311, a closing limit, 312, a grounding limit, 32, a bus, 33, a drainage row, 34, a movable contact tube, 35, a contact spring, 36, a cylinder, 37, an air cylinder, 38, a spring, 41, a contact tube, 42, a movable arc contact, 43, a nozzle, 44, a crank arm seat, 45, a piston, 51, a wiring copper bar, 52, a fixed main contact, 53, a fixed arc contact, 54, 55, a deionizing grid, 551, a fixed contact, a steel plate 552, a spring, a filter screen, a load switch, an operation hole, a grounding buffer, a filter pad, a control hole, a switch, a control hole, and an operation holes.

[ detailed description ] of the utility model

The utility model is further described below with reference to examples and with reference to the accompanying drawings.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.

Examples

The embodiment realizes a rotary and direct-acting combined compressed air type environment-friendly gas load switch cabinet.

The embodiment relates to a rotary and direct-acting combined compressed air type environment-friendly gas load switch cabinet, wherein load switches of three-phase three-station combined switches are vertically arranged, grounding switches are horizontally arranged, and the load switches and the grounding switches share the same group of moving contacts, main contacts and arc contacts for separation.

Fig. 1 is a three-dimensional perspective view of a rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet. As shown in fig. 1, the rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet in the embodiment is a three-phase three-station load switch cabinet (hereinafter referred to as a cabinet for short), and the cabinet comprises a sealed gas chamber 1, a cable chamber 2 and a mechanism control chamber 3. The front panel of the mechanism control chamber 3 is provided with a load switch operation hole 61 and a ground switch operation hole 62.

Fig. 2 is a left side view of the concealed seal air chamber 1, the cable chamber 2 and the left side plate of the mechanism control chamber 3 of the rotary and direct-acting combined air-compressing environment-friendly gas load switch cabinet. As shown in fig. 2, in the rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet of the embodiment, the sealed gas chamber 1 is located at the upper rear part of the cabinet and is completely sealed, and the sealed gas chamber 1 comprises a gas tank 4, a combined switch 6 and the like and is filled with environment-friendly gas (such as dry air, nitrogen and the like); the combined switch 6 has a three-phase structure, namely an A phase, a B phase and a C phase.

FIG. 3 is a sectional view of a rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet A-A. As shown in fig. 2 and fig. 3, in the embodiment, the bus 9 is connected with the upper surface of the combined switch 6 through bus bushings 11 on two sides, and the expansion of the bus between cabinets is realized, the lower surface of the combined switch 6 is connected with the cable bushing 7 through a connecting conductor 12, and the front surface of the combined switch 6 is connected with an output shaft 63 of the operating mechanism 8 through a transmission shaft 13; said cable compartment 2 is located in the lower part of said cabinet and comprises said cable sleeve 7 for cable connections; the mechanism control room 3 is positioned at the front upper part of the cabinet and comprises an operating mechanism 8 and electric, mechanical control, interlocking and other devices.

As shown in fig. 2 and 3, the sealed air chamber 1 comprises an air box 4, a pressure relief device 5 arranged outside the air box 4, and a three-phase three-station combined switch 6 arranged in the air box 4, wherein the air box 4 is of a full-sealed structure and is filled with environmental protection air; the combined switch 6 consists of a rotary and direct-acting combined pneumatic load switch 601 and a grounding switch 602; the cable chamber 2 comprises a cable sleeve 7 for cable connection; the mechanism control room 3 comprises an operating mechanism 8 for electrical, mechanical control and interlocking; the gas tank 4 is internally provided with a bus 9, a connection row 10 and a bus sleeve 11 penetrating through the gas tank, the combined switch 6 is connected with the bus through the bus sleeve 11 to realize expansion of the bus between cabinets, and the combined switch 6 is connected with the cable sleeve 7 through a connecting conductor 12 to realize cable connection; the operating mechanism 8 controls the on/off of the load switch 601, and the on/off of the grounding switch 602 through the transmission shaft 13 and the crank arm 14, so as to realize the on/off and grounding of the load switch cabinet.

Fig. 4 is a partial enlarged view of a rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet I. Fig. 5 is a partial enlarged view of a rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet II. Fig. 6 is an enlarged view of part of a rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet III. As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, in the rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet of this embodiment, the combined switch 6 includes a metal chassis 21, a movable contact base 22, a movable contact 23, insulating support plates 24 on two sides of the movable contact 23, an insulating base 25, a fixed contact 26, a grounding fixed contact 27, a grounding short copper bar 28, the transmission shaft 13, and the crank arms 14 on two sides of the movable contact 23. As shown in fig. 4 and 6, the movable contact 22 includes a fixed seat 31, a busbar 32, a drainage row 33, a movable contact tube 34, a contact spring 35, a cylinder 36, an air cylinder 37, and a spring 38, which are integrally formed with or fixed to one end of the insulating support plate 24. As shown in fig. 4 and 5, the moving contact 23 includes a contact tube 41, a moving arc contact 42 fixed at one end of the contact tube 41, a nozzle 43, a lever seat 44, and a piston 45 fixed at the other end of the contact tube 41. As shown in fig. 3 and fig. 5, the fixed contact 26 comprises a wiring copper bar 51, a fixed main contact 52, a fixed arc contact 53, a fixed contact spring 56, a buffer pad 54 and a deionization grid 55; as shown in fig. 3, the grounding static contact 27 includes the same grounding static main contact, grounding static arc contact, grounding static contact spring and grounding buffer pad as the static contact 26; as shown in fig. 1 and 2, the front surface of the operating mechanism 8 includes the load switch 601 operation hole 61, the ground switch 602 operation hole 62, and the output shaft 63.

As shown in fig. 1, fig. 2 and fig. 3, in the rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet of this embodiment, a load switch operation hole 61 and a ground switch operation hole 62 are formed in the front of the operation mechanism 8, and are used for manual operation, and respectively correspond to the operations of the load switch 601 and the ground switch 602, and an output shaft 63 is formed in the rear of the operation mechanism, and the output shaft 63 is connected with the transmission shaft 13 for transmission; when the operation mechanism 8 is operated, energy is stored firstly, and when the operation mechanism reaches an inflection point, the energy is released rapidly, the transmission shaft 13 is driven by the output shaft 63, and the movable contact 23 is driven by the crank arm 14 to move rapidly; the movable contact 23 is driven by the crank arm 14 to perform rotation and linear motion on the upper portion of the insulating support plate 24, and forms on/off (isolation) of the load switch 601 with the fixed contact 26, and moves on the lower portion of the insulating support plate 24, and forms on/off (isolation) of the ground switch 602 with the ground fixed contact 27, thereby realizing on/off (isolation) and ground functions of the load switch cabinet.

As shown in fig. 3, 4, 5 and 6, in the rotary and direct-acting combined compressed air type environment-friendly gas load switch cabinet of the embodiment, the static contact 26 is fixed on the upper side of the metal chassis 21 through the insulating base 25, the static arc contact 53 and the static main contact 52 are coaxially fixed on the wiring copper bar 51, and the static arc contact 53 is axially higher than the static main contact 52 by a certain distance but lower than an outer edge bell jar of the insulating base 25 by a certain distance, so that the static contact 26 is placed in the outer edge bell jar of the insulating base 25; the fixed main contact 52 is of a cup-shaped cylindrical structure, the cup bottom is fixed with the wiring copper bar 51, the cup mouth is a petal contact, and the fixed contact spring 56 is under the action of tightening stress or is selected from a self-operated contact to form sliding electric contact with the movable contact 23; the grounding static contact 27 and the grounding short copper bar 28 are directly fixed on the lower side of the metal chassis 21 together; the ends of the static arc contact 53 and the moving arc contact 42 are made of arc-resistant materials (such as tungsten or copper-tungsten alloy, etc.); the movable contact seat 22 is located in the middle of the load switch 601 and the grounding switch 602, and is fixed in the middle of the metal chassis 21 by the insulating support plates 24 at two sides, one end of the fixed seat 31 is connected with the insulating support plates into a whole or fixed, the other end of the fixed seat is fixed with the metal chassis 21, and the transmission shaft 13 passes through together with the shaft hole of the metal chassis 21 to drive the crank arm 14 to realize three-phase linkage; the movable contact tube 34 is of a cylindrical structure, one end of the movable contact tube is fixed in the air cylinder 37, and the other end of the movable contact tube is made into a petal contact under the action of tightening stress of the contact spring 35, or a self-operated contact is selected to form sliding electric contact with the movable contact 23; the inflator 37 is made of insulating material and is composed of a cylinder with a large axis and a small axis which are orthogonal, the small cylinder is coaxially fixed with the cylinder 36 and rotates along with the cylinder 36, one end of the large cylinder is connected with the movable contact tube 34, and the end face of the other end of the large cylinder is closed; the movable contact tube 34 uses the cylinders 36 on both sides as rotation shafts, the springs 38 are installed between the concave holes of the cylinders 36 and the bus bars 32, so that the movable contact tube 34 and the bus bars 32 on both sides form rotary electric contact through the cylinders 36 and the springs 38, and meanwhile, the movable contact tube 34 and the contact tube 41 form linear sliding electric contact, so that the movable contact 23 rotates by taking the cylinders 36 on both sides as shafts, and moves linearly by taking the movable contact tube 34 as a guide and forms a conductive loop; the contact tube 41, the movable arc contact 42, the nozzle 43, the piston 45 and the crank arm seat 44 are coaxially fixed, the movable arc contact 42 is fixed in the contact tube 41 and axially higher than the contact tube 41 by a certain distance but lower than the nozzle 43 by a certain distance, the piston 45 slides up and down in the air cylinder 37 and the movable contact tube 34 to form an air cylinder structure of the movable contact 23, and the air in the air cylinder 37 is compressed to blow out an electric arc through the nozzle 43 in opening and buffer impact in closing; one end of each crank arm 14 on two sides of the movable contact 23 is fixedly connected with the transmission shaft 13, and the other end is rotationally connected with the symmetrical shaft bosses on two sides of the crank arm seat 44; the fixed seat 31 is provided with a closing limit 311 and a grounding limit 312, and holes for shaft convex connection of the two sides of the crank arm 14 and the crank arm seat 44 are certain holes, so that the contact tube 41 and the fixed main contact 52 are better contacted; the deionization grid 55 is installed in the insulating seat 25, and is composed of a plurality of bent steel plates 551 and filter screens 552 which are arranged in parallel, and is installed above the fixed contact 26, a plurality of turbulence punching holes are arranged on each bent steel plate 551, the turbulence punching holes are insulated from each other and keep a certain air gap distance, the filter screens 552 are metal nets with a certain grid density, and are fixed on the uppermost surface of the deionization grid 55.

As shown in fig. 3, fig. 4, fig. 5, and fig. 6, in the rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet of this embodiment, the moving contact 23, the moving arc contact 42, the fixed contact 26, the fixed arc contact 53, the grounding fixed contact 27, and the moving contact tube 34 all adopt cylindrical, round-head structures, and combinations thereof, and the electrical contact modes between them are coaxial and smooth electrical contact modes; the insulating support plate 24, the fixing seat 31 and the insulating seat 25 are cast by solid insulating materials and are integrated; the combination parts of the insulating base 25, the wiring copper bar 51 and the fixed main contact 52 are respectively provided with a certain honeycomb vent hole, so that high-temperature arc gas is guided to the deionization grid 55 for cooling and filtering.

Fig. 7 is a schematic diagram of a closing state of the rotary and direct-acting combined compressed air type environment-friendly gas load switch cabinet after the rear plate of the sealed gas chamber 1 is hidden. Fig. 8 is a schematic diagram of a rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet in a brake-separating state after a rear plate of a sealed gas chamber 1 is hidden. Fig. 9 is a schematic diagram of a grounding state of the rotary and direct-acting combined compressed air type environment-friendly gas load switch cabinet after hiding the rear plate of the sealed gas chamber 1. As shown in fig. 3, 4, 5, 6, 7, 8, and 9, in the rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet of the present embodiment, when the moving contact 23 starts the load switch 601 from the closed position under the drive of the crank arm 14, on one hand, the moving contact 23 rotates with the moving contact tube 34 around the cylinders 36 on both sides, and on the other hand, the moving contact 23 moves relatively to the moving contact tube 34 in a straight line, the stationary main contact 52 separates from the contact tube 41 first, while the stationary arc contact 53 blocks the nozzle 43 at the opening start stage, the piston 45 pre-compresses gas in the air cylinder 37 until the nozzle 43 separates from the stationary arc contact 53 and after the separation, the pre-compressed gas and the piston 45 blow out the arc through the nozzle 43 together with the compressed gas that the moving contact 23 continues to divide, and the gas that moves with the moving contact 23 and the stationary contact 26, and finally arrives at the dividing position; when the moving contact 23 starts to be driven by the crank arm 14 from the split position and the load switch 601 is in quick approaching with the fixed contact 26 in the process of rotating and directly moving the moving contact 23, before the contact tube 41 is inserted into the fixed main contact 52, the fixed arc contact 53 is inserted into the nozzle 43, so that the nozzle 43 is blocked, the piston 45 compresses gas in the inflator 37 to buffer the closing impact of the moving contact 23, and the moving contact 23 smoothly reaches and stays at the closing position under the combined restriction of the buffer pad 54 and the closing limit 311; the moving contact 23 is driven by the crank arm 14 to perform grounding and time sharing of the grounding switch 602, and the closing limit 311 is changed into the grounding limit 312, except that the moving contact 23 has different moving directions, and the closing and opening processes are the same as those of the load switch 601.

As shown in fig. 3, 4, 5, 6, 7, 8, and 9, when the moving contact 23 is at the closing position of the load switch 601, the sliding contact between the contact tube 41 and the fixed main contact 52 is a main conductive loop, and the sliding contact between the moving arc contact 42 and the fixed arc contact 53 is an auxiliary combustion arc loop, so as to improve the reliability and the electrical life of the load switch 601; in time sharing, as the moving arc contact 42 and the static arc contact 53 are relatively axially higher and are separated later, when and after the static main contact 52 is separated from the contact tube 41, the electric arc burns between the two and is blown out under the combined action of the compressed gas generated in the process of separation and the nozzle 43, and the high-temperature electric arc gas is restrained by the outer edge bell of the insulating seat 25 and reaches the deionization grid 55 upwards to be further cooled and filtered, so that the inter-phase influence and gas pollution are reduced, and the current break and separation are smoothly completed; at this time, since the moving arc contact 42 and the static arc contact 53 are relatively axially higher and contact earlier, an arc will be generated between them before they contact each other and extinguish after they contact each other, and then the contact tube 41 contacts the static main contact 52, thereby completing current closing and engagement; in the combining and separating process of the insulating seat 25 and the deionization grid 55, the high-temperature arc gas is separated and sucked and discharged through the chimney effect of the outer edge bell jar of the insulating seat 25, and the deionization grid 55 is cooled and filtered, so that arc pollution and interphase influence are reduced; the moving contact 23 is driven by the crank arms 14 at both sides to perform grounding and time sharing of the grounding switch 602, and the moving contact 23 is different in moving direction and the same as the switching-on and switching-off process of the load switch 601.

Further, the load switch 601 and the grounding switch 602 of the combination switch 6 may be used in combination according to needs, such as a grounding switch above a lower load switch, or a load switch or a grounding switch above and below the lower load switch, or may be simplified to be a single load switch or a grounding switch for independent use; the bus sleeve 11 is of an inner cone shape, is arranged on the side surface of the inner upper part of the sealed air chamber 4 and realizes the connection and expansion of buses between the switch cabinets through a bus connector; alternatively, the bus sleeve 11 is an outer cone, is installed outside the top of the sealed air chamber 4, and realizes connection and expansion of buses between the switch cabinets through an insulating bus.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and additions to the present utility model may be made by those skilled in the art without departing from the principles of the present utility model and such modifications and additions are to be considered as well as within the scope of the present utility model.

Claims (9)

1. The utility model provides a rotatory, straight dynamic combination's gaseous load cubical switchboard of compressed air formula environmental protection, includes sealed air chamber, cable chamber and mechanism control room, its characterized in that: the sealed air chamber comprises an air box, a pressure relief device arranged outside the air box and a three-phase three-station combined switch arranged in the air box, and the air box is of a full-sealed structure and is filled with environment-friendly insulating gas; the cable chamber comprises a cable sleeve for cable connection; the mechanism control room comprises an operating mechanism for electrical and mechanical control and interlocking; the three-phase three-station combined switch is connected with the bus through the bus sleeve to realize expansion of the bus between cabinets, and is connected with the cable sleeve through the connecting conductor to realize cable connection; the three-phase three-station combined switch comprises an air cylinder type movable contact seat, a piston type movable contact, a fixed contact, a grounding fixed contact and a crank arm, wherein one end of the movable contact seat is fixed, the first end of the crank arm is connected with two sides of a contact end of the movable contact in a connecting rod mode, the operating mechanism is connected with the second end of the crank arm through a transmission shaft and drives the crank arm to rotate, and meanwhile, the movable contact is driven to do linear motion in the movable contact seat, so that the movable contact and the fixed contact are controlled to be combined and separated, and the movable contact and the grounding fixed contact are controlled to be separated and combined, so that the switching-on, switching-off and grounding operation of the three-phase three-station combined switch are realized.

2. The rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet according to claim 1, wherein: the movable contact comprises a contact tube, a honeycomb hole-shaped movable arc contact fixed at one end of the contact tube, a nozzle, a crank arm seat and a piston fixed at the other end of the contact tube; the static contact comprises a static main contact, a static contact spring, a sharp rod-shaped static arc contact, a buffer pad arranged on the front surface of the static arc contact and a deionization grid arranged on the back surface of the static arc contact; the static arc contact and the static main contact are coaxially fixed on the wiring copper bar, the static arc contact is higher than the static main contact in the axial direction, the static main contact is of a cup-shaped cylinder structure, the cup bottom is fixed with the wiring copper bar, the cup mouth is a petal contact, and under the action of tightening stress of the static contact spring, sliding electric contact is formed with the moving contact; the contact tube, the movable arc contact, the nozzle, the piston and the crank arm seat are coaxially fixed, the crank arm seat is rotationally connected with the first end of the crank arm through two axises which are symmetrically arranged left and right, and the movable arc contact is fixed in the contact tube and axially higher than the contact tube but lower than the nozzle; the piston type moving contact and the fixed contact are in time sharing, the fixed main contact is separated from the contact tube firstly, the static arc contact is separated from the moving arc contact later, the arc is extinguished through the nozzle and the deionization grid, and the piston type moving contact and the fixed contact are in time sharing, the static arc contact is inserted into the moving arc contact earlier, the contact tube is inserted into the fixed main contact later, and the impact is buffered through the nozzle and the buffer pad.

3. The rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet as claimed in claim 2, wherein: the three-phase three-station combined switch further comprises a metal underframe, two insulating support plates, an insulating seat and a short copper bar; the inflator type movable contact seat and the piston type movable contact of the air compressing cylinder structure are fixed between the metal underframe by two insulating support plates, and the transmission shaft penetrates through the second end of the crank arm together with the shaft hole of the metal underframe to drive the crank arm to rotate; the static contact is fixed on the upper side of the metal chassis through the insulating seat, the static arc contact is lower than the outer edge bell jar of the insulating seat, the static contact is placed in the outer edge bell jar of the insulating seat, and the deionization grid is installed in the insulating seat; the grounding static contact and the short circuit copper bar are directly fixed on the lower side of the metal chassis; the turning arm rotates to enable the moving contact to be in a closing position when in contact with the fixed contact, the turning arm rotates to enable the moving contact to be in a grounding position when in contact with the grounding fixed contact, and the turning arm rotates to enable the turning arm and the air compressing cylinder structure to be in a straight line and to be in a separating position.

4. A rotary and direct-acting combined pneumatic environmental protection gas load switch cabinet as claimed in claim 3, wherein: the movable contact seat comprises an air cylinder, a fixed seat, a busbar, a drainage row, a movable contact tube, a contact spring, a cylinder and a spring; the movable contact tube is of a cylindrical structure, one end of the movable contact tube is fixed in the air cylinder, and the other end of the movable contact tube is made into a petal contact to form sliding electric contact with the movable contact under the action of tightening stress of the contact spring; the piston slides up and down in the air cylinder and the movable contact tube to form an air compressing cylinder structure, and the air in the air cylinder is compressed to blow out an electric arc through the nozzle when the air cylinder is opened, and buffer impact when the air cylinder is closed; the inflator is made of insulating materials and consists of a large cylinder and a small cylinder, the two axes of the large cylinder and the small cylinder are orthogonal, the small cylinder and the cylinder are coaxially fixed and rotate along with the cylinder, one end of the large cylinder is connected with the movable contact tube, and the end face of the other end of the large cylinder is closed; the movable contact tube takes the cylinders at two sides as rotating shafts, the springs are arranged between concave holes of the cylinders and the bus bars, so that the movable contact tube and the bus bars at two sides form rotary electric contact through the cylinders and the springs, and meanwhile, the movable contact tube and the contact tube form linear sliding electric contact, so that the movable contact rotates by taking the cylinders at two sides as shafts, and the movable contact tube moves linearly as a guide to form a conductive loop.

5. The rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet as claimed in claim 4, wherein: the fixed seat is provided with a closing limit limiting the closing action of the moving contact and the fixed contact and a grounding limit limiting the grounding action of the moving contact and the grounding fixed contact.

6. The rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet as claimed in claim 5, wherein: the ends of the static arc contact and the moving arc contact are made of arc-resistant materials; the deionization grid consists of a plurality of bent steel plates and or filter screens which are arranged in parallel, wherein a plurality of turbulence punching holes are arranged on the bent steel plates, the turbulence punching holes are insulated from each other and keep air gap spacing, and the filter screens are metal screens with grid density and are fixed on the deionization grid; and honeycomb vent holes are arranged at the joint parts of the insulating base, the wiring copper bar and the fixed main contact and are used for guiding high-temperature arc gas to the deionization grid for cooling and filtering.

7. The rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet as claimed in claim 6, wherein: the movable contact, the movable arc contact, the fixed contact, the static arc contact, the grounding fixed contact and the movable contact tube are all in cylindrical, cylindrical and round head structures and combinations, and the electric contact modes are coaxial and smooth electric contact modes; the insulating support plate, the fixing seat and the insulating seat are cast by solid insulating materials and are integrated.

8. The rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet as claimed in claim 7, wherein: the grounding static contact comprises a grounding static main contact, a grounding static contact spring, a pointed rod-shaped grounding static arc contact and a grounding buffer pad arranged on the front surface of the static arc contact; the grounding static arc contact and the grounding static main contact are coaxially fixed on the grounding short circuit copper bar, the grounding static arc contact is higher than the grounding static main contact in the axial direction, the grounding static main contact is of a cup-shaped cylinder structure, the cup bottom is fixed with the grounding short circuit copper bar, the cup mouth is a petal contact, and sliding electric contact is formed with the moving contact under the action of tightening stress of the grounding static contact spring.

9. The rotary and direct-acting combined pneumatic environment-friendly gas load switch cabinet as claimed in claim 8, wherein: the grounding static contact is arranged on the upper side of the metal chassis, and the grounding static contact is arranged on the lower side of the metal chassis, or only the static contact is arranged, or only the grounding static contact is arranged; the bus sleeve is of an inner cone shape, is arranged on the inner upper side surface of the sealed air chamber and realizes connection and expansion of buses between the switch cabinets through a bus connector; or the bus sleeve is externally conical, is arranged outside the top of the sealed air chamber and realizes connection and expansion of buses among the switch cabinets through the insulating buses.