CN115020146A

CN115020146A - Isolating switch

Info

Publication number: CN115020146A
Application number: CN202210923799.6A
Authority: CN
Inventors: 陈来苗; 徐光明; 徐玲
Original assignee: Xuzhou Sonat Technology Co ltd
Current assignee: Xuzhou Sonat Technology Co ltd
Priority date: 2022-08-02
Filing date: 2022-08-02
Publication date: 2022-09-06

Abstract

The invention discloses an isolating switch, belonging to the field of isolating switches, comprising an insulating base and a clockwork spring, wherein a rotating rod is arranged on the surface of the insulating base, which is close to each other, through a bearing, a handle is arranged at one end of the rotating rod, the clockwork spring is connected with the tail end surface of the rotating rod, a box body is arranged on the outer side of the clockwork spring, a protective sleeve is sleeved on the surface of the clockwork spring, a cavity formed by the protective sleeve and the clockwork spring is an air cavity, a compression spring is arranged at the tail end of the air cavity, a partition plate is connected with one end of the compression spring, two oppositely arranged inflating racks are arranged on the surface of the protective sleeve, the cross section area of the clockwork spring is increased by arranging the protective sleeve on the outer side of the clockwork spring, and the compression spring is extruded by the clockwork spring, so that the torque of the clockwork spring when resetting has a superposed expansion state, and further, the moving contact and the static contact of the isolating switch have a faster separation speed when being separated, and the state of closing is automatically maintained through the inflating rack.

Description

Isolating switch

Technical Field

The invention relates to the field of isolating switches, in particular to an isolating switch.

Background

The isolating switch has no arc extinguishing device, when it is in the closing position, it can bear working current, but can not be used for switching on or cutting off load current and short-circuit current, and when the isolating switch is used, it can play the role of isolating voltage, and in addition, it also can have the effect of switching on and off small current circuit and switching-off operation, and has important action in the power maintenance equipment The number of static contacts is increased, the control is inconvenient, the grid plate arc extinguishing has high material requirements on the grid plate, the cost is difficult to control, and the improvement of the separation speed of the static and dynamic contacts does not need additional power equipment, and the requirements on the material are not high, so the grid plate arc extinguishing becomes the preferred arc extinguishing.

The existing isolating switch mostly adopts a powerful opening spring with better elasticity when the separating speed of the moving contact and the static contact is improved, the effect of quickly separating the moving contact and the static contact is achieved by utilizing the instantaneous elastic potential energy of the spring after torsion, or the purpose of quickly separating the moving contact and the static contact is achieved by utilizing the torsion of other energy storage components, but when the spring is singly used as a power source, the spring is required to have better performance, so that the spring is required to be finely processed in the processing process, the cost of the spring is improved, in addition, the isolating switch utilizes a rotating shaft part to drive the spring to be twisted, in order to ensure the smooth rotation of the rotating shaft part and weaken the quick separation between the moving contact and the static contact, the installation of the rotating shaft part and an isolating switch base is usually realized by adopting a bearing part, and after the rotating shaft part rotates to realize the closing of the isolating switch, the rotating shaft part needs to be manually fixed for a long time in order to keep the closing state, making the use of the disconnector inconvenient.

To this end, we propose a disconnector to solve the above problems.

Disclosure of Invention

1. Technical problem to be solved

The invention aims to provide an isolating switch, which can increase the cross-sectional area of a clockwork spring by arranging a protective sleeve on the outer side of the clockwork spring, so that the clockwork spring has larger torque, and the torque of the clockwork spring has a superposed expansion state when the clockwork spring is reset by extruding a compression spring when the clockwork spring is extruded, so that a moving contact and a static contact of the isolating switch have higher separation speed when being separated, the cost of the clockwork spring in the manufacturing process is not required to be increased, and the isolating switch can automatically keep a closing state after being closed by expanding an air cavity through expansion of an inflating rack without manual maintenance, thereby facilitating the use of the isolating switch.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

An isolating switch comprises an insulating base and a clockwork spring, wherein a rotating rod is arranged on the surfaces, close to each other, of the insulating base through a bearing, a handle rod is arranged at one end of the rotating rod and is positioned on one side of the insulating base, the clockwork spring is connected to the surface of the tail end of the rotating rod, a box body is arranged on the outer side of the clockwork spring, and the surface, away from the rotating rod, of one side of the box body is movably connected with the surface of the insulating base through a bearing;

the surface of the clockwork spring is sleeved with a protective sleeve, the length of the protective sleeve is smaller than that of the clockwork spring, a cavity formed by the protective sleeve and the clockwork spring is an air cavity, a compression spring is installed at the tail end of the air cavity, one end of the compression spring is connected with a partition plate, and the surface of the partition plate is in sliding sealing connection with the outer surface of the clockwork spring and the inner surface of the protective sleeve;

two oppositely arranged inflation racks are arranged on the surface of the protective sleeve, and the two sets of inflation racks are connected with the air cavity in a penetrating manner.

Furthermore, one group of the inflation racks is located at the tail end of the surface of the protective sleeve, the other group of the inflation racks is located on the surface of the inner side ring of the protective sleeve, and anti-skid grains are arranged on the surfaces of the two groups of the inflation racks.

Further, an insulating film is mounted on the surface of the protective sleeve.

Furthermore, a support and a support pile are installed at the top of the insulating base, the support pile and the support are arranged oppositely, a connecting frame is installed at the top of the support pile through a shaft seat, a moving contact is connected to the tail end of the connecting frame, a static contact seat is fixedly installed at the top of the support, and each group of static contact seats corresponds to the installation position of each group of moving contacts one to one.

Furthermore, the surface of the rotating rod is sleeved with a driving arm, and the tail end of the driving arm is movably connected with the surface of the connecting frame through a shaft piece.

Furthermore, an inner cylinder is installed inside the stationary contact seat, an insulating sealing plate is installed on the inner wall of the inner cylinder, a return spring is installed at the bottom of the insulating sealing plate, the tail end of the return spring is connected with the bottom wall of the stationary contact seat, a cavity formed by the side wall of the inner cylinder and the inner side wall of the stationary contact seat is a lubricating cavity, and the moving contact is connected with the inner cylinder in an embedded mode.

Furthermore, a cavity formed by the bottom of the insulating sealing plate and the bottom wall of the stationary contact seat is an oil storage cavity, and a through hole is formed in the inner wall of the inner cylinder in a penetrating mode.

Furthermore, a metal strip is installed at the bottom of the insulating sealing plate and is in a telescopic sliding design, and the metal strip is located on the inner side of the return spring.

Furthermore, the bottom of insulating seal plate runs through and installs the siphunculus, and the siphunculus is located one side of metal strip, the surface of stationary contact seat runs through and installs the inlet pipe, and the tail end of inlet pipe extends into the inside in lubricated chamber, the check valve is all installed to the inside of inlet pipe and siphunculus.

Furthermore, methyl silicone oil is filled in the oil storage cavity, and a plurality of inflatable balls in floating arrangement are placed in the oil storage cavity.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the invention increases the cross section area of the spring by installing the spring, the compression spring, the air cavity and the protective sleeve, and the arrangement of the air cavity increases the overall torque of the spring, so that the spring has larger energy storage capacity under the same deformation, and further the spring has larger impulse in the recovery process, so that the moving contact and the inner barrel are separated more quickly, and a better arc extinguishing effect is achieved, along with the rotation of the rotating rod, the inner side of the spring is gradually tightened, the tightened air cavity is compressed, and further the gas in the part of the air cavity is extruded and transmitted to the air cavity which is not extruded and is close to the tail end of the protective sleeve, at the moment, the air cavity at the tail end of the protective sleeve expands, so that the compression spring is extruded, and the gas in the expanded air cavity has larger impact effect in the subsequent recovery process of the spring, accelerate clockwork spring's speed of recovering to have great potential energy effect when making clockwork spring resume, and then make moving contact and inner tube separate faster, strengthen the arc extinguishing effect.

(2) According to the invention, the inflating rack is arranged, so that when the air cavity at the tail end of the protective sleeve expands, the interior of the inflating rack can synchronously expand and is further meshed with the inflating rack after the expansion, the spring is prevented from continuously contracting inwards, the limiting and fixing effects are achieved, the isolating switch can automatically keep a switch-on state after being switched on, manual maintenance is not needed, and the isolating switch is convenient to use.

(3) According to the invention, the surface of the protective sleeve is in an insulated and smooth state through the insulating film, so that when the spiral spring is retracted inwards, the internal and external adjacent spiral springs have smaller frictional resistance when retracted, and further, an operator has smaller resistance when holding the handlebar to drive the spiral spring to be folded.

(4) According to the isolating switch, the oil storage cavity and the small inflatable balls are arranged, when the moving contact is quickly separated from the inner cylinder, the inner wall of the inner cylinder can generate friction heat, the inner cylinder can heat methyl silicone oil and the small inflatable balls in the oil storage cavity, the small inflatable balls are heated and expanded at the moment, oil bodies in the oil storage cavity are extruded to rise, then the oil bodies enter the inner cylinder through the through holes and return through the through pipes, flowing heat dissipation operation is achieved, the heat dissipation effect is accelerated, the moving contact and the static contact seat of the isolating switch can be quickly separated, meanwhile, quick heat dissipation and cooling can be achieved, and the possibility of electric arc generation caused by heat accumulation during subsequent switch-on of the isolating switch is reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the installation structure of the insulating base and the rotating rod of the present invention;

FIG. 3 is a schematic view of the mounting structure of the winding stem and spring and the case of the present invention;

FIG. 4 is a schematic cross-sectional view of a power spring of the present invention;

FIG. 5 is a schematic cross-sectional view of a power spring of the present invention;

FIG. 6 is a schematic view of the spring of the present invention in a tightened and contracted state;

FIG. 7 is a schematic illustration of the clockwork spring recovery process of the present invention;

FIG. 8 is a schematic view of the inner barrel of the present invention;

FIG. 9 is a schematic diagram of the movement state of the oil body in the oil storage cavity when the moving contact is closed with the inner cylinder;

FIG. 10 is a schematic view of the bottom structure of the inner cylinder of the present invention.

The reference numbers in the figures illustrate:

1. an insulating base; 2. a drive arm; 3. a moving contact; 4. a support; 5. a handle bar; 6. a rotating rod; 7. a clockwork spring; 8. a box body; 9. an air cavity; 10. a protective sleeve; 11. an inflation rack; 12. a compression spring; 13. a partition plate; 14. a lubrication chamber; 15. an insulating sealing plate; 16. an oil storage chamber; 17. a return spring; 18. a through hole; 19. an inner barrel; 20. a metal strip; 21. pipe passing; 22. a feeding pipe; 23. a stationary contact seat.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is to be understood that the embodiments described are merely exemplary embodiments, rather than exemplary embodiments, and that all other embodiments may be devised by those skilled in the art without departing from the scope of the present invention.

Example 1:

referring to fig. 1-5, an isolating switch includes an insulating base 1 and a spiral spring 7, a rotating rod 6 is mounted on a surface of the insulating base 1, which is close to each other, through a bearing, a handle rod 5 is mounted at one end of the rotating rod 6, the handle rod 5 is located at one side of the insulating base 1, the spiral spring 7 is connected to a surface of a tail end of the rotating rod 6, a box body 8 is mounted on an outer side of the spiral spring 7, and a surface of the box body 8, which is away from the rotating rod 6, is movably connected to a surface of the insulating base 1 through a bearing;

specifically, drive bull stick 6 through barre 5 and rotate, and then drive clockwork spring 7 and twist reverse, play the energy storage effect for subsequent recoil, the installation of box body 8 simultaneously can make clockwork spring 7's operating surface blocked by the inner wall of box body 8, and then clockwork spring 7's operating surface is in the horizontality, protects clockwork spring 7's normal life.

The surface of the clockwork spring 7 is sleeved with a protective sleeve 10, the length of the protective sleeve 10 is smaller than that of the clockwork spring 7, a cavity formed by the protective sleeve 10 and the clockwork spring 7 is an air cavity 9, the tail end of the air cavity 9 is provided with a compression spring 12, one end of the compression spring 12 is connected with a partition plate 13, and the surface of the partition plate 13 is in sliding sealing connection with the outer surface of the clockwork spring 7 and the inner surface of the protective sleeve 10;

specifically, the other end of the clockwork spring 7 is fixed on the inner wall of the box body 8;

the arrangement of the air cavity 9 enables the cross sectional area of the spring 7 to be increased, so that the overall torque of the spring 7 is increased, the spring 7 has larger energy storage capacity under the same deformation, and the spring 7 has larger impulse in the recovery process, so that the movable contact 3 and the inner cylinder 19 are separated more quickly, and a better arc extinguishing effect is achieved;

simultaneously, along with the rotation of bull stick 6, clockwork spring 7's inboard is tightened up gradually, make the air chamber 9 after tightening up compressed, and then make the inside gas of this part air chamber 9 be extruded and convey not by extruded, be close to in the air chamber 9 of protective sheath 10 tail end, the air chamber 9 inflation of protective sheath 10 tail end this moment, and then play the extrusion to compression spring 12, make the inside gas of air chamber 9 after the inflation have great impact effect at clockwork spring 7 recovery in-process afterwards, accelerate clockwork spring 7's recovery speed, thereby make clockwork spring 7 have great potential energy effect when resumeing, and then make moving contact 3 and inner tube 19 separate more fast, strengthen the arc extinguishing effect.

Referring to fig. 5 to 7, two opposite inflation racks 11 are installed on the surface of the protective sheath 10, and two sets of inflation racks 11 are connected to the air cavity 9 in a penetrating manner, wherein one set of inflation racks 11 is located at the tail end of the surface of the protective sheath 10, the other set of inflation racks 11 is located on the inner side ring surface of the protective sheath 10, and the surfaces of the two sets of inflation racks 11 are provided with anti-skid patterns.

Specifically, when the tail end air cavity 9 of the protective sleeve 10 expands, the inside of the inflating rack 11 can be synchronously expanded, and then the inflating rack 11 after the expansion of another group is meshed, so that the spring 7 is prevented from continuously contracting inwards, a limiting and fixing effect is achieved, the isolating switch can automatically keep a switch-on state after switch-on, manual maintenance is not needed, and the isolating switch is convenient to use.

In addition, when clockwork spring 7 resumes, bull stick 6 counter-rotation, and then extend in the inside air cavity 9 of the inside gas of expanded air cavity 9 to aerify the flat shrink of rack 11, and then lose limiting displacement, can not play the interference to the switching-off.

The surface of the protective cover 10 is mounted with an insulating film.

Specifically, through insulating film for the surface of protective sheath 10 is in insulating smooth state, and then clockwork spring 7 is when the inward contraction, and inside and outside adjacent clockwork spring 7 has less frictional resistance when the shrink, and then makes operating personnel have less resistance when holding the barre 5 and drive and draw in clockwork spring 7 in.

Referring to fig. 1-2, a support 4 and a support pile are installed on the top of an insulating base 1, the support pile and the support 4 are arranged oppositely, a connecting frame is installed on the top of the support pile through a shaft seat, a moving contact 3 is connected to the tail end of the connecting frame, a stationary contact seat 23 is fixedly installed on the top of the support 4, each stationary contact seat 23 corresponds to the installation position of each moving contact 3, a transmission arm 2 is sleeved on the surface of a rotating rod 6, and the tail end of the transmission arm 2 is movably connected with the surface of the connecting frame through a shaft.

Specifically, the movable contact 3 can be correspondingly closed and far away from the inner cylinder 19 along with the rotation of the rotating rod 6 through the transmission arm 2, and then the closing and opening processing of the isolating switch is realized.

Referring to fig. 8-10, an inner cylinder 19 is installed inside the stationary contact base 23, an insulating sealing plate 15 is installed on the inner wall of the inner cylinder 19, a return spring 17 is installed at the bottom of the insulating sealing plate 15, the tail end of the return spring 17 is connected with the bottom wall of the stationary contact base 23, a cavity formed by the side wall of the inner cylinder 19 and the inner side wall of the stationary contact base 23 is a lubricating cavity 14, the movable contact 3 is connected with the inner cylinder 19 in an embedded manner, a cavity formed by the bottom of the insulating sealing plate 15 and the bottom wall of the stationary contact base 23 is an oil storage cavity 16, and a through hole 18 is formed in the inner wall of the inner cylinder 19 in a penetrating manner.

Specifically, the moving contact 3 rubs against the inner cylinder 19 after entering the inner cylinder 19, and simultaneously impacts and extrudes the insulating sealing plate 15, so that oil in the compression oil storage cavity 16 floats upwards, enters the lubricating cavity 14 and enters the inner cylinder 19 through the through hole 18 to lubricate the surface of the moving contact 3, and the moving contact 3 is more smoothly separated from the static contact, thereby assisting the rapid separation of the moving contact 3 and the static contact.

Due to the design of the reset spring 17, the insulating sealing plate 15 can return, so that a proper distance is ensured when the next round of moving contact 3 is contacted with the fixed contact, and the closing effect is ensured.

The bottom of the insulating sealing plate 15 is provided with a metal strip 20, the metal strip 20 is designed to slide telescopically, and the metal strip 20 is positioned on the inner side of the return spring 17.

Specifically, the metal strip 20 can realize a normal circuit connection effect when the movable contact 3 and the inner cylinder 19 are in contact, and the metal strip 20 can realize movable treatment along with the movement of the insulating sealing plate 15 due to the telescopic design.

The bottom of insulating seal plate 15 runs through and installs siphunculus 21, and siphunculus 21 is located one side of metal strip 20, and the surface of stationary contact seat 23 runs through and installs inlet pipe 22, and the tail end of inlet pipe 22 extends into the inside of lubricated chamber 14, and the inside of inlet pipe 22 and siphunculus 21 all installs the check valve.

Specifically, the lubricating oil in the inner cylinder 19 is returned to the oil storage cavity 16 in a single direction through the through pipe 21, so that the cyclic utilization of oil bodies is realized;

since the bottom of the lubrication chamber 14 communicates with the oil reservoir 16, the feed pipe 22 allows the oil body to be replenished through the lubrication chamber 14.

Methyl silicone oil is filled in the oil storage cavity 16, and a plurality of inflatable balls which are arranged in a floating mode are placed in the oil storage cavity 16.

Specifically, the methyl silicone oil has good chemical stability, insulativity and good hydrophobic property, and can realize a lubricating effect;

when moving contact 3 and inner tube 19 quickly separating, can make the inner wall of inner tube 19 produce the frictional heat, this moment inner tube 19 can be to the methyl silicone oil of oil storage chamber 16 inside and aerify the bobble and produce the heating, it is heated the inflation to aerify the bobble this moment, and then the inside oil body of extrusion oil storage chamber 16 rises, later through the inside of through-hole 18 entering inner tube 19 and return through siphunculus 21, realize the heat dissipation operation that flows, with higher speed the radiating effect, and then when making this isolator's moving contact 3 and quiet contact seat 23 quickly separating, can realize the cooling of fast heat dissipation, reduce the heat and gather the possibility that takes place electric arc when leading to follow-up isolator to close a floodgate.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. The utility model provides a disconnecting switch, includes insulating base (1) and clockwork spring (7), its characterized in that: the surface, close to each other, of the insulating base (1) is provided with a rotating rod (6) through a bearing, one end of the rotating rod (6) is provided with a handle rod (5), the handle rod (5) is located on one side of the insulating base (1), the tail end surface of the rotating rod (6) is connected with a clockwork spring (7), the outer side of the clockwork spring (7) is provided with a box body (8), and the surface, away from the rotating rod (6), of one side of the box body (8) is movably connected with the surface of the insulating base (1) through the bearing;

the surface of the clockwork spring (7) is sleeved with a protective sleeve (10), the length of the protective sleeve (10) is smaller than that of the clockwork spring (7), a cavity formed by the protective sleeve (10) and the clockwork spring (7) is an air cavity (9), a compression spring (12) is installed at the tail end of the air cavity (9), one end of the compression spring (12) is connected with a partition plate (13), and the surface of the partition plate (13) is connected with the outer surface of the clockwork spring (7) and the inner surface of the protective sleeve (10) in a sliding and sealing mode;

the surface of the protective sleeve (10) is provided with two oppositely arranged inflation racks (11), and the two groups of inflation racks (11) are connected with the air cavity (9) in a penetrating way.

2. A disconnector according to claim 1, characterized in that: one group of the inflatable racks (11) is located at the tail end of the surface of the protective sleeve (10), the other group of the inflatable racks (11) is located on the inner side ring surface of the protective sleeve (10), and anti-skid grains are arranged on the surfaces of the two groups of the inflatable racks (11).

3. A disconnector according to claim 1, characterized in that: and an insulating film is arranged on the surface of the protective sleeve (10).

4. A disconnector according to claim 1, characterized in that: support (4) and support stake are installed at the top of insulating base (1), and support stake and support (4) mutual disposition, the link is installed through the axle bed in the top of supporting the stake, the trailing end connection of link has moving contact (3), the top fixed mounting of support (4) has stationary contact seat (23), and every stationary contact seat of group (23) and the mounted position one-to-one of every moving contact of group (3).

5. A disconnector according to claim 4, characterized in that: the surface of the rotating rod (6) is sleeved with the transmission arm (2), and the tail end of the transmission arm (2) is movably connected with the surface of the connecting frame through a shaft piece.

6. A disconnector according to claim 4, characterized in that: the utility model discloses a lubricating device for the internal combustion engine, including stationary contact seat (23), insulating sealing plate (15) are installed to the internally mounted of stationary contact seat (23), insulating sealing plate (15) are installed to the inner wall of inner tube (19), reset spring (17) are installed to the bottom of insulating sealing plate (15), and the tail end of reset spring (17) is connected with the diapire of stationary contact seat (23), the cavity that the lateral wall of inner tube (19) and the inboard wall of stationary contact seat (23) formed is lubricated chamber (14), moving contact (3) are connected with inner tube (19) gomphosis.

7. A disconnector according to claim 6, characterized in that: the cavity that the bottom of insulating seal plate (15) and the diapire of stationary contact seat (23) formed is oil storage chamber (16), the inner wall of inner tube (19) runs through and is equipped with through-hole (18).

8. A disconnector according to claim 6, characterized in that: the bottom of insulating seal board (15) is installed metal strip (20), and metal strip (20) are flexible sliding design, metal strip (20) are located reset spring (17)'s inboard.

9. A disconnector according to claim 6, characterized in that: the bottom of insulating seal board (15) runs through and installs siphunculus (21), and siphunculus (21) are located one side of metal strip (20), the surface of static contact seat (23) runs through and installs inlet pipe (22), and the tail end of inlet pipe (22) extends into the inside of lubricated chamber (14), the check valve is all installed to the inside of inlet pipe (22) and siphunculus (21).

10. A disconnector according to claim 7, characterized in that: methyl silicone oil is filled in the oil storage cavity (16), and a plurality of inflatable balls which are arranged in a floating mode are placed in the oil storage cavity (16).