CN210039933U

CN210039933U - Explosion-proof power capacitor

Info

Publication number: CN210039933U
Application number: CN201920840681.0U
Authority: CN
Inventors: 张新太; 吴晓林; 沈宇; 杨建忠
Original assignee: LESHAN YILADE POWER NETWORK AUTOMATION CO Ltd
Current assignee: LESHAN YILADE POWER NETWORK AUTOMATION CO Ltd
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2020-02-07
Anticipated expiration: 2029-06-04

Abstract

The utility model discloses an explosion-proof type power capacitor, which comprises an outer shell, the electric capacity core, binding post, the relief pressure valve, the overflow valve, be filled with the gas insulation filler in the shell, and set up a plurality of electric capacity cores that connect in parallel each other, the electric capacity core is connected with binding post, and set up the insulating layer between shell and the electric capacity core, it has the solid insulation filler to fill between each electric capacity core, the upper end of shell sets up the relief pressure valve, the air inlet of relief pressure valve sets up in the inside of shell, the gas outlet of relief pressure valve sets up in the outside of shell, the upper portion outer wall or the lower part outer wall of shell are equipped with the intermediate layer, the overflow valve sets up on the outer wall of shell and is located the intermediate layer, interbedded bottom still is equipped with collects the. In this way, the utility model discloses in reinforcing power capacitor's heat dispersion, also played fine explosion-proof effect to power capacitor.

Description

Explosion-proof power capacitor

Technical Field

The utility model relates to a power capacitor field especially relates to an explosion-proof type power capacitor.

Background

The power capacitor is a capacitor used for power systems and electrical equipment, and with the development of power capacitor technology, it is widely used in the fields of factory power distribution systems, residential area power distribution systems, commercial buildings, traffic tunnel power distribution systems, outdoor power distribution boxes, and the like.

Under the power capacitor operating condition, because of the operation of internal plant can produce a certain amount of heat, if these heats can not in time distribute, will pile up in power capacitor inside, cause power capacitor's damage very easily like this. At present, the present power capacitor adopts closed structure mostly, and inside is full of liquid medium, when taking place inside serious failures such as wet, temperature superscript, three-phase short circuit, the increase of power capacitor internal current makes liquid medium gasification, and inside gas pressure increases to oil leak or drum tripe phenomenon take place, very easily cause near power capacitor's equipment failure, can cause the explosion even when serious, and then cause the electric power accident.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an explosion-proof power capacitor.

In order to solve the technical problem, the utility model discloses a technical scheme be: an explosion-proof power capacitor is provided, which comprises a shell, a capacitor core, a lead terminal, a pressure reducing valve and an overflow valve, wherein the shell is filled with gas insulation filler, and a plurality of the capacitor cores are arranged in parallel, the capacitor cores are connected with the wiring terminals, an insulating layer is arranged between the shell and the capacitor cores, solid insulating fillers are filled between the capacitor cores, the upper end of the shell is provided with a pressure reducing valve, the air inlet of the pressure reducing valve is arranged inside the shell, the air outlet of the pressure reducing valve is arranged outside the shell, the upper portion outer wall or the lower part outer wall of shell are equipped with the intermediate layer, the overflow valve sets up on the outer wall of shell and is located in the intermediate layer, interbedded bottom still is equipped with collects the storehouse, and the middle part outer wall ring of shell is equipped with the heat dissipation layer, the louvre that a plurality of arrays were arranged is seted up on the surface on heat dissipation layer.

Preferably, the wiring terminal is sleeved with an insulating sleeve, and the lower end of the wiring terminal is connected with the capacitor core through a leading-out wire.

Preferably, collect the storehouse with the connection can be dismantled to the intermediate layer, interbedded lower part is equipped with the opening, collect the storehouse and be located in the opening, just one side of collecting the storehouse and being close to the shell outer wall has the bar groove, be equipped with on the shell with collect the bar groove matched with chimb in storehouse, the chimb can be gone into the bar inslot in order to incite somebody to action it is fixed in to collect the storehouse on the shell.

Preferably, the convex edge and the strip-shaped groove are made of magnets with different magnetic poles.

Preferably, a pull ring is arranged on the side face, far away from the outer wall of the shell, of the collection bin.

Preferably, an inclined block is arranged in the collecting bin, the inclined block and the outer wall of the upper portion or the outer wall of the lower portion of the outer shell are integrally formed, the inclined block is located below the overflow valve, and one side, far away from the outer shell, of the inclined block inclines downwards.

Preferably, the shell and the heat dissipation layer are both cylindrical, the inner wall of the heat dissipation layer is provided with a heat conduction silica gel pad, one side of the heat conduction silica gel pad is connected to the inner wall of the heat dissipation layer, and the other side of the heat conduction silica gel pad is tightly attached to the outer wall of the middle of the shell.

Preferably, the gas insulating filler is an inert gas, and the solid insulating filler is an epoxy resin.

Preferably, a flame retardant is filled between the insulating layer and the capacitor core.

Be different from prior art's condition, the beneficial effects of the utility model are that:

1. through set up the atmospheric pressure valve at the top of shell, when the atmospheric pressure of power capacitor inside was too big, then the relief pressure valve opened, made some atmospheric pressure in the power capacitor inside discharge shell to the outer bulge of outer wall or the top cap of shell have been avoided effectively and have been dashed.

2. The gas insulation filler filled in the shell provides a certain buffer effect for the interior of the shell, when the air pressure in the shell is increased, a part of pressure can be absorbed firstly, and when the air pressure in the shell is increased continuously, and when the air pressure in the shell reaches the threshold value of the pressure reducing valve, the pressure reducing valve is opened to release air, so that the air pressure in the shell is reduced; solid insulating fillers are filled between the capacitor cores, so that each capacitor core is well fixed, and the normal work of the power capacitor is further ensured; an insulating layer is arranged between the inner wall of the shell and the capacitor core, and a fire retardant is arranged between the insulating layer and the capacitor core, so that the hidden danger of combustion of the capacitor is avoided.

3. Set up the overflow valve at the upper portion outer wall of shell or lower part outer wall, when power capacitor inside leads to the atmospheric pressure to increase suddenly because of the trouble, the overflow valve is opened, the gas-liquid mixture blowout in the shell, get into the intermediate layer, keep apart with the air, shell fracture explosion and fire have been avoided, after power capacitor internal pressure recovers normally, the overflow valve is closed, and there is collection storehouse at intermediate layer bottom demountable installation, the inside gas-liquid mixture of shell is collected by collection storehouse after the overflow valve discharges, only need to collect the storehouse and take out from the intermediate layer, just can clear up the gas-liquid mixture in the intermediate layer, make equipment cleaner, the stability of condenser has been kept.

4. The heat dissipation layer is arranged on the outer wall of the middle of the shell in a surrounding mode, and the heat dissipation layer is provided with the heat conduction silica gel pad between the shells, so that the heat dissipation effect of the power capacitor is better, and the probability of explosion of the power capacitor due to the heat dissipation problem is reduced.

Drawings

Fig. 1 is a schematic structural diagram of an explosion-proof power capacitor of the present invention;

fig. 2 is a plan view of a heat dissipation layer of the explosion-proof power capacitor of the present invention;

fig. 3 is a schematic diagram of the working cooperation between the collection bin and the housing of the explosion-proof power capacitor of the present invention.

Reference numbers in the figures: 1-shell, 101-convex edge, 102-inclined block, 2-capacitor core, 3-wiring terminal, 301-insulating sleeve, 4-pressure reducing valve, 5-overflow valve, 6-gas insulating filler, 7-insulating layer, 8-solid insulating filler, 9-interlayer, 10-collection bin, 1001-strip groove, 11-heat dissipation layer, 1101-heat dissipation hole, 1102-heat conducting silica gel pad and 12-pull ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in figure 1, the utility model comprises a shell 1, capacitance cores 2, a wiring terminal 3, a pressure reducing valve 4 and an overflow valve 5, wherein the shell 1 is filled with a gas insulation filler 6, and a plurality of capacitance cores 2 which are connected in parallel are arranged, the current flowing into each capacitance core 2 is smaller than that of the traditional integrated capacitance core 2 by adopting the parallel connection mode, thereby the generated heat is less, the capacitance core 2 is connected with the wiring terminal 3, an insulating layer 7 is arranged between the shell 1 and the capacitance core 2, an insulating layer 7 is arranged between the inner wall of the shell 1 and the capacitance core 2, a fire retardant is arranged between the insulating layer 7 and the capacitance core 2, the hidden danger of burning of the capacitor is avoided, solid insulation fillers 8 are filled between the capacitance cores 2, the solid insulation fillers 8 can fix the relative positions between the capacitance cores 2, so as to keep the plurality of capacitor cores 2 stable during the operation, in the embodiment, the solid insulating filling member is epoxy resin, which not only has good insulation, and can also firmly fix each electric capacity core 2, the processing production is easy, the cost is lower, the upper end of shell 1 sets up relief pressure valve 4, relief pressure valve 4's air inlet sets up in the inside of shell 1, relief pressure valve 4's gas outlet sets up in the outside of shell 1, the upper portion outer wall or the lower part outer wall of shell 1 are equipped with intermediate layer 9, overflow valve 5 sets up on the outer wall of shell 1 and is located intermediate layer 9, intermediate layer 9 keeps apart overflow valve 5 combustion gas liquid mixture and air, shell 1 fracture explosion and ignition have been avoided, intermediate layer 9's bottom still is equipped with collects storehouse 10, the middle part outer wall ring of shell 1 is equipped with heat dissipation layer 11, heat dissipation hole 1101 that a plurality of arrays were arranged is seted up.

Specifically, the shell 1 is cylindrical, the gas insulation filler 6 filled in the shell 1 provides a certain buffer effect for the interior of the shell 1, when the air pressure in the shell increases, a part of pressure can be absorbed firstly, when the air pressure in the shell continues to increase, when the air pressure in the shell 1 reaches the threshold value of the pressure reducing valve 4, the pressure reducing valve 4 is opened to release air, so that the air pressure in the shell 1 is reduced, and therefore the outer wall of the shell 1 is effectively prevented from bulging or the top cover is prevented from being opened; the cover is equipped with insulation support 301 on binding post 3, binding post 3's lower extreme is connected with the condenser core through the lead-out wire, insulation support 301 can adopt the high strong electromagnetic material that has higher mechanical strength, insulation support 301 includes a plurality of full skirts, can change the size of full skirt and the interval between two full skirts as required, and the work piece is not only mechanical strength height like this, and creepage distance and electric clear distance can change as required, have fine electric property.

As shown in fig. 2, further, the heat dissipation layer 11 is cylindrical, the heat dissipation layer 11 is disposed on the housing 1 in a surrounding manner, and the heat dissipation hole 1101 arranged in an annular array is disposed on the heat dissipation layer 11, a thermal conductive silicone pad 1102 is disposed on an inner wall of the heat dissipation layer 11, one surface of the thermal conductive silicone pad 1102 is connected to the inner wall of the heat dissipation layer 11, and the other surface of the thermal conductive silicone pad is closely attached to an outer wall of the middle portion of the housing 1, so that a heat dissipation effect of the power capacitor can be enhanced, and a probability of explosion of the power capacitor due to a heat dissipation.

As shown in fig. 3, further, the collecting bin 10 is detachably connected with the interlayer 9, an opening is arranged at the lower part of the interlayer 9, the collecting bin 10 is positioned in the opening, and one side of the collecting bin 10 close to the outer wall of the shell 1 is provided with a strip-shaped groove 1001, the position of the shell 1 corresponding to the strip-shaped groove 1001 is provided with a convex edge 101 matched with the strip-shaped groove 1001, the convex edge 101 can be clamped into the strip-shaped groove 1001 to fix the collecting bin 10 on the shell 1, and a pull ring 12 is arranged on the side of the collecting bin 10 far away from the outer wall of the shell 1, so that the collecting bin can be taken out from the interlayer 9 more conveniently, the gas-liquid mixture accumulated in the collecting bin can be cleaned, the stability of the capacitor is maintained while the capacitor is cleaned, in this embodiment, the convex edge 101 and the strip-shaped groove 1001 are made of magnets with different magnetic poles, so that the convex edge 101 on the outer wall of the housing 1 is more closely matched with the strip-shaped groove 1001 on the collecting groove. Furthermore, an inclined block 102 is further arranged in the interlayer 9, the inclined block 102 is integrally formed with the upper outer wall or the lower outer wall of the shell 1, the inclined block 102 is located below the overflow valve 5, one side, away from the shell 1, of the inclined block 102 is inclined downwards and corresponds to the position inside the collection bin 10 at the bottom of the interlayer 9, therefore, when the air pressure is suddenly increased due to a fault inside the power capacitor, the overflow valve 5 is opened and discharges the gas-liquid mixture inside the shell 1, the inclined block 102 can play a role in buffering and dredging, the gas-liquid mixture is discharged into the collection bin 10, the cleanness inside the interlayer 9 is kept, and the stability of the capacitor is further improved.

In this way, the utility model discloses in reinforcing power capacitor's heat dispersion, also played fine explosion-proof effect to power capacitor.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An explosion-proof power capacitor, comprising: shell, electric capacity core, lead terminal, relief pressure valve, overflow valve, be filled with gaseous insulation filler in the shell to set up a plurality of parallelly connected each other the electric capacity core, the electric capacity core is connected with binding post, and sets up the insulating layer between shell and the electric capacity core, it has solid insulation filler to fill between each electric capacity core, the upper end of shell sets up the relief pressure valve, the air inlet of relief pressure valve sets up in the inside of shell, and the gas outlet of relief pressure valve sets up in the outside of shell, the upper portion outer wall or the lower part outer wall of shell are equipped with the intermediate layer, the overflow valve sets up on the outer wall of shell and is located in the intermediate layer, interbedded bottom still is equipped with collects the storehouse, and the middle part outer wall ring of shell is equipped with the heat dissipation layer.

2. An explosion-proof power capacitor as claimed in claim 1, wherein the terminal is sleeved with an insulating sleeve, and the lower end of the terminal is connected to the capacitor core through a lead-out wire.

3. The explosion-proof power capacitor of claim 1, wherein the collection bin is detachably connected to the interlayer, an opening is formed in the lower portion of the interlayer, the collection bin is located in the opening, a strip-shaped groove is formed in one side, close to the outer wall of the housing, of the collection bin, a convex edge matched with the strip-shaped groove of the collection bin is arranged on the housing, and the convex edge can be clamped into the strip-shaped groove to fix the collection bin on the housing.

4. An explosion-proof power capacitor as claimed in claim 3, characterized in that the flanges and the slots are made of magnets with different magnetic poles.

5. An explosion proof power capacitor as claimed in claim 3 wherein the collection chamber is provided with a pull ring on the side thereof remote from the outer wall of the housing.

6. The explosion-proof power capacitor of claim 1, wherein an inclined block is arranged in the collection bin, the inclined block is integrally formed with the upper outer wall or the lower outer wall of the outer shell, the inclined block is located below the overflow valve, and one side of the inclined block, which is far away from the outer shell, is inclined downwards.

7. The explosion-proof power capacitor of claim 1, wherein the housing and the heat dissipation layer are both cylindrical, and a heat-conducting silicone pad is disposed on an inner wall of the heat dissipation layer, and one side of the heat-conducting silicone pad is connected to the inner wall of the heat dissipation layer, and the other side of the heat-conducting silicone pad is closely attached to an outer wall of a middle portion of the housing.

8. An explosion-proof power capacitor as claimed in claim 1, characterized in that the gas-insulating filler is an inert gas and the solid insulating filler is an epoxy resin.

9. An explosion-proof power capacitor as claimed in claim 1, characterized in that a flame retardant is filled between the insulating layer and the capacitor core.