CN111668061B - Explosion chamber disk seat and explosion chamber - Google Patents
Explosion chamber disk seat and explosion chamber Download PDFInfo
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- CN111668061B CN111668061B CN201910164468.7A CN201910164468A CN111668061B CN 111668061 B CN111668061 B CN 111668061B CN 201910164468 A CN201910164468 A CN 201910164468A CN 111668061 B CN111668061 B CN 111668061B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/64—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid wherein the break is in gas
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Abstract
The invention relates to an arc extinguish chamber valve seat and an arc extinguish chamber. The arc extinguish chamber valve seat comprises a disk-shaped seat body, the disk-shaped seat body is provided with an outer peripheral surface which is used for being in sliding sealing fit with a moving contact of the arc extinguish chamber and a central hole which is in sliding sealing fit with a central pull rod of the moving contact, a disk surface of the disk-shaped seat body is provided with a pressure release valve, the pressure release valve comprises a valve rod which is movably arranged on the disk-shaped seat body in a penetrating way, two sides of the disk-shaped seat body are provided with pressure release holes which are communicated, and one side of the disk-shaped seat body is provided with a pressure release valve plate which is used for blocking the pressure release holes; one end of the valve rod penetrates through the pressure relief valve plate and is in blocking fit with the disk-shaped seat body, the other end of the valve rod is sleeved with a pressure relief spring, the pressure relief valve plate is tightly pressed on the disk-shaped seat body under the elastic action of the pressure relief spring to seal the pressure relief hole, and a nut locking part for tightly pressing the pressure relief spring is further spirally arranged at one end, back to the pressure relief valve plate, of the pressure relief spring on the valve rod. The technical problem that the voltage grade of the arc extinguish chamber applicable to the arc extinguish chamber valve seat in the prior art is single is solved by the technical scheme.
Description
Technical Field
The invention relates to the technical field of high-voltage switch equipment, in particular to an arc extinguish chamber valve seat and an arc extinguish chamber.
Background
The self-energy arc extinguish chamber increases the pressure in the air chamber by utilizing the energy of the electric arc, has the advantages of simplicity, reliability, low operation power and the like, is generally adopted by various switch manufacturers at present, and gradually develops to a higher voltage level. The self-energy circuit breaker mainly utilizes the principle of 'thermal expansion' to design the arc extinguishing chamber, and the arc extinguishing chamber has a thermal expansion room to absorb the electric arc energy, stores the high-pressure gas of thermal expansion state, utilizes the air compression effect of the air compression cylinder that circuit breaker itself possessed simultaneously, and with "thermal expansion" with "air compression" two kinds of advantages organic combination, make the high-pressure gas sound velocity blow to electric arc when quiet arc contact leaves the shower nozzle throat, reach the arc extinguishing effect.
When the self-energy arc extinguish chamber is switched on and off with medium and large currents, the air blowing is provided by the thermal expansion chamber, and when the self-energy arc extinguish chamber is switched on and off with small currents, the air blowing is combined by the air compression chamber and the thermal expansion chamber. For example, in the chinese patent with publication No. CN104979128B, the pressure chamber does not contribute to blowing during opening and closing of a large current, the compression of the gas in the pressure chamber acts as a barrier to the movement of the movable part in the arc extinguishing chamber, and when the opening is in the last stage, the volume of the pressure chamber is smaller, and the barrier to the movement of the movable part is stronger. Therefore, in order to eliminate the blocking effect, a pressure relief structure of the pressure chamber is added to each self-energy type arc-extinguishing chamber, so that when the arc-extinguishing chamber is disconnected with a large current, the pressure chamber is relieved, and the pressure rise of the pressure chamber is limited. Pressure relief structure installs on the disk seat of self-energy formula explosion chamber usually, and the disk seat comprises structures such as the disk seat body, valve block, spring usually, and the spring often can leave certain compression capacity when the installation and guarantee to open the valve block when the indoor gas pressure of calming anger is too big and carry out the pressure release.
However, the valve seat of the self-energy arc-extinguishing chamber has certain limitations in use, and is only suitable for arc-extinguishing chambers with specific voltage classes because the pre-compression amount of the spring is certain; aiming at arc extinguish chambers with different voltage grades, the valve seat structure needs to be redesigned and manufactured to match the corresponding voltage grade, and the cost input is greatly improved.
Disclosure of Invention
The invention aims to provide an arc extinguish chamber valve seat to solve the technical problem that the arc extinguish chamber valve seat in the prior art is only suitable for an arc extinguish chamber with a single voltage class; the invention also aims to provide the arc extinguish chamber using the arc extinguish chamber valve seat, so as to solve the technical problem that the arc extinguish chamber in the prior art is single in applicable voltage level.
In order to achieve the purpose, the technical scheme of the valve seat of the arc extinguish chamber provided by the invention is as follows: an arc extinguish chamber valve seat comprises a disk-shaped seat body, wherein the disk-shaped seat body is provided with an outer peripheral surface which is used for being in sliding sealing fit with a moving contact of an arc extinguish chamber and a central hole which is in sliding sealing fit with a central pull rod of the moving contact; one end of the valve rod penetrates through the pressure relief valve plate and is in blocking fit with the disk-shaped seat body, the other end of the valve rod is sleeved with a pressure relief spring, the pressure relief valve plate is tightly pressed on the disk-shaped seat body under the elastic action of the pressure relief spring to seal the pressure relief hole, and a nut locking part for tightly pressing the pressure relief spring is further spirally arranged at one end, back to the pressure relief valve plate, of the pressure relief spring on the valve rod.
Beneficial effect of explosion chamber disk seat: according to the arc extinguish chamber valve seat, the pressure relief spring penetrates through the valve rod, the nut locking part for compressing the pressure relief spring is spirally installed at one end, away from the pressure relief valve plate, of the valve rod, the nut locking part can reliably fix the pressure relief spring, and compared with the arc extinguish chamber valve seat in the prior art, pre-compression amount of the pressure relief spring can be adjusted by screwing the nut locking part on the arc extinguish chamber valve seat, namely pre-tightening pressure and working pressure of the pressure relief spring can be adjusted, and further the pre-tightening pressure and the working pressure of the pressure relief valve plate can be adjusted, so that self-adaptive adjustment can be carried out on air pressure inside the arc extinguish chamber, the pressure and speed requirements of a circuit breaker when different currents are switched on and switched off are met, and the arc extinguish chamber valve seat is suitable for arc extinguish chambers with different voltage levels. The valve seat of the arc extinguish chamber provided by the invention can be installed in arc extinguish chambers with different voltage grades by adjusting the precompression amount of the pressure relief spring, and has a wide application range.
Furthermore, more than two pressure relief holes are formed in the disc-shaped seat body.
Has the advantages that: when the gas pressure in the gas compression chamber of the arc extinguish chamber is overlarge, more than two pressure relief holes are formed in the number of the pressure relief holes, so that rapid pressure relief can be realized, and the opening speed of the circuit breaker is not influenced.
Further, each pressure relief hole shares one pressure relief valve plate.
Has the beneficial effects that: each pressure relief hole shares one pressure relief valve plate, so that when the pressure relief valve plate is opened or closed, the pressure relief holes can be opened or closed at the same time; meanwhile, the number of the pressure relief valve plates can be reduced, and the structure of the valve seat is simplified.
Further, the valve rod is equipped with more than two, and each valve rod all wears to adorn in the pressure release spring, nut locking part is including being used for the roof pressure release spring's spring clamp plate with twist soon twist on the valve rod and be located the spring clamp plate and deviate from the lock nut of pressure release spring one side.
Has the beneficial effects that: the plurality of valve rods penetrate through the same pressure relief valve plate, so that a good guiding effect on the pressure relief valve plate can be realized, and the pressure relief valve plate is prevented from being inclined to block a pressure relief hole; the spring pressing plate and the locking nut are used together, so that the pressure relief spring is fixed and compressed, and the pre-compression amount of the pressure relief spring is convenient to adjust.
Furthermore, the nut locking component also comprises a back nut which is screwed on the valve rod and is positioned on one side of the locking nut, which is far away from the spring pressure plate.
Has the advantages that: set up a back of body nut again in one side of lock nut, have further fixed effect of locking to the pressure release spring, can prevent that the pressure release spring from taking place not hard up under the valve rod receives high impact.
Furthermore, an air compensating valve is further arranged on the disc-shaped seat body and is positioned on the inner side or the outer side of the pressure release valve in the radial direction.
Has the advantages that: the gas supplementing valve and the pressure release valve are arranged in a radially staggered manner, so that the mutual interference of elements in the gas supplementing valve and the pressure release valve in the opening or closing process can be avoided, and the mutual influence of the elements in the opening and closing process is ensured.
Furthermore, the outer peripheral face of explosion chamber disk seat is the echelonment, has major diameter section and path section, and the outer peripheral face of major diameter section constitutes the outer peripheral face that is used for with the movable contact seat sliding seal cooperation of explosion chamber, the relief valve sets up on the path section, the gulp valve sets up on the major diameter section.
Has the advantages that: the valve seat of the arc extinguish chamber is made into a step-shaped structure, the size of the valve seat can be reduced, the requirement of the installation space in the arc extinguish chamber is met, the pressure release valve is arranged on the small-diameter section, the air supply valve is arranged on the large-diameter section, namely, the two sections are arranged in a radially staggered mode, and the processes of opening and closing can be achieved without mutual influence.
The technical scheme of the arc extinguish chamber provided by the invention is as follows: an arc extinguish chamber comprises a cylinder body, wherein a valve seat is fixedly arranged in the cylinder body, a moving contact is assembled on the outer side of the valve seat in a sliding sealing manner, the valve seat comprises a disk-shaped seat body, the disk-shaped seat body is provided with an outer peripheral surface matched with the moving contact of the arc extinguish chamber in a sliding sealing manner and a central hole matched with a central pull rod of the moving contact in a sliding sealing manner, a pressure release valve is arranged on the disk surface of the disk-shaped seat body, the pressure release valve comprises a valve rod movably arranged on the disk-shaped seat body in a penetrating manner, pressure release holes with two communicated sides are formed in the disk-shaped seat body, and a pressure release valve block used for blocking the pressure release holes is arranged on one side of the disk-shaped seat body; one end of the valve rod penetrates through the pressure relief valve plate and is in blocking fit with the disk-shaped seat body, the other end of the valve rod is sleeved with a pressure relief spring, the pressure relief valve plate is tightly pressed on the disk-shaped seat body under the elastic action of the pressure relief spring to block the pressure relief hole, and a nut locking component used for tightly pressing the pressure relief spring is further spirally arranged at one end, back to the pressure relief valve plate, of the pressure relief spring on the valve rod.
The beneficial effect of explosion chamber: the pre-compression amount of the pressure relief spring in the inner valve seat of the arc extinguish chamber is adjusted to adjust the pre-compression pressure and the working pressure of the pressure relief spring, so that the pre-compression pressure and the working pressure of the pressure relief valve plate can be adjusted, the air pressure in the arc extinguish chamber can be adjusted in a self-adaptive mode, and the pressure and speed requirements of a circuit breaker on different currents are met. The voltage grade suitable for the arc extinguish chamber can be adjusted by adjusting the precompression amount of the pressure relief spring, and the application occasion and the application range of the arc extinguish chamber are improved.
Furthermore, more than two pressure relief holes are formed in the disc-shaped seat body.
Has the beneficial effects that: when the gas pressure in the gas compression chamber of the arc extinguish chamber is too large, more than two pressure relief holes are formed in the number of the pressure relief holes, so that rapid pressure relief can be realized, and the opening speed of the circuit breaker is not influenced.
Further, each pressure relief hole shares one pressure relief valve plate.
Has the advantages that: each pressure relief hole shares one pressure relief valve plate, so that when the pressure relief valve plate is opened or closed, the pressure relief holes can be opened or closed at the same time; meanwhile, the using quantity of the pressure relief valve plates can be reduced, and the structure of the valve seat is simplified.
Further, the valve rod is equipped with more than two, and each valve rod all wears to adorn in the pressure release spring, nut locking part is including being used for the roof pressure release spring's spring clamp plate with twist soon twist on the valve rod and be located the spring clamp plate and deviate from the lock nut of pressure release spring one side.
Has the advantages that: the plurality of valve rods penetrate through the same pressure relief valve plate, so that a good guiding effect on the pressure relief valve plate can be realized, and the situation that the pressure relief valve plate is inclined and a pressure relief hole is not tightly blocked is avoided; the spring pressing plate and the locking nut are used together, so that the pressure relief spring is fixed and compressed, and the pre-compression amount of the pressure relief spring is adjusted conveniently.
Further, the nut locking component also comprises a back nut which is screwed on the valve rod and is positioned on one side of the locking nut, which is far away from the spring pressure plate.
Has the advantages that: set up a back of the body lock nut again in one side of lock nut, have further locking fixed effect to the pressure release spring, can prevent under the valve rod receives high impact effect that the pressure release spring from taking place not hard up.
Furthermore, an air compensating valve is further arranged on the disc-shaped seat body and is positioned on the inner side or the outer side of the pressure release valve in the radial direction.
Has the advantages that: the gas supplementing valve and the pressure release valve are arranged in a radially staggered manner, so that the mutual interference of elements in the gas supplementing valve and the pressure release valve in the opening or closing process can be avoided, and the mutual influence of the elements in the opening and closing process is ensured.
Furthermore, the outer peripheral surface of the valve seat is in a step shape and is provided with a large-diameter section and a small-diameter section, the outer peripheral surface of the large-diameter section forms an outer peripheral surface which is in sliding sealing fit with a movable contact seat of the arc extinguish chamber, the pressure release valve is arranged on the small-diameter section, and the air supply valve is arranged on the large-diameter section.
Has the advantages that: the valve seat is made into a step-shaped structure, the size of the valve seat can be reduced, the requirement of an installation space in an arc extinguishing chamber is met, the pressure release valve is arranged on the small-diameter section, the air supply valve is arranged on the large-diameter section, namely the air supply valve and the large-diameter section are arranged in a radially staggered mode, and the processes of opening and closing can be achieved without mutual influence.
Furthermore, a cylindrical fixed seat is coaxially and fixedly arranged in the cylinder, the small-diameter section of the valve seat is positioned in the cylindrical fixed seat, the large-diameter section of the valve seat is positioned outside the cylindrical fixed seat, and the valve seat is connected with the inner wall surface of the cylindrical fixed seat through the outer peripheral surface of the small-diameter section of the valve seat.
Has the beneficial effects that: the valve seat is connected with the inner wall surface of the cylindrical fixing seat through the outer peripheral surface of the small-diameter section of the valve seat, and the large-diameter section of the valve seat is positioned outside the cylindrical fixing seat, so that the axial installation dimension of the cylindrical fixing seat can be reduced, excessive installation space in the cylinder does not need to be occupied, and the whole arc extinguish chamber is simple in structure.
Drawings
FIG. 1 is a schematic structural diagram of an arc chute valve seat provided by the present invention;
fig. 2 is a schematic view of gas flow of the arc extinguish chamber provided by the invention during switching on and switching off;
fig. 3 is a schematic structural diagram of an arc extinguishing chamber provided by the present invention.
Description of reference numerals: 1-disk-shaped seat body, 2-pressure release valve, 3-valve rod, 4-pressure release hole, 5-pressure release valve plate, 6-pressure release spring, 7-center hole, 8-spring pressure plate, 9-locking nut, 10-back fastening nut, 11-moving contact, 12-static contact, 13-air compression chamber, 14-thermal expansion chamber, 15-center pull rod, 16-air supplement valve plate, 17-air supplement hole, 18-air supplement spring rod, 19-air supplement spring, 20-opening pin, 21-moving main contact, 22-moving arc contact, 23-static main contact, 24-static arc contact, 25-cylinder body, 26-fixed seat and 27-one-way valve.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
The invention provides a specific embodiment of an arc extinguish chamber valve seat, which comprises the following steps: the arc extinguish chamber valve seat is applied to an ultrahigh pressure self-energy arc extinguish chamber, and comprises a disc-shaped seat body 1, wherein the disc-shaped seat body 1 is provided with an outer peripheral surface which is in sliding sealing fit with a movable contact 11 in the arc extinguish chamber in the figure 3, and is also provided with a central hole 7 which is in sliding sealing fit with a central pull rod 15 of the movable contact 11, and a pressure release valve 2 is arranged on a disc surface of the disc-shaped seat body 1. Because the installation space in the explosion chamber is limited, for saving space, the periphery of whole explosion chamber disk seat is the echelonment in this embodiment, has big footpath section and path section, and wherein, relief valve 2 wholly sets up on the path section, and the outer peripheral face of big footpath section then forms the outer peripheral face with 11 sliding seal of moving contact cooperations.
The disk base 1 is provided with a pressure relief hole 4 with two through sides, the pressure relief hole 4 is communicated with the air compression chamber 13 in fig. 3 and is used for exhausting when the air pressure in the air compression chamber 13 is overlarge. The pressure release valve 2 comprises a valve rod 3 movably arranged on the disk-shaped seat body 1 in a penetrating way and a pressure release valve plate 5 arranged on one side of the disk-shaped seat body 1 and used for plugging a pressure release hole 4. One end of the valve rod 3 penetrates through the pressure relief valve plate 5 and penetrates into a mounting hole formed in the disc-shaped seat body 1 to be matched with the disc-shaped seat body 1 in a blocking way; the other end of the valve rod 3 is sleeved with a pressure relief spring 6, and the pressure relief spring 6 is a pressure spring. The pressure relief valve plate 5 is tightly pressed on the disk-shaped seat body 1 under the elastic action of the pressure relief spring 6 to block the pressure relief hole 4; and a nut locking part for pressing the pressure relief spring is spirally arranged at one end of the valve rod 3, which is back to the pressure relief valve plate 5, of the pressure relief spring 6. In the embodiment, three valve rods 3 are arranged, and each valve rod 3 is arranged in the pressure relief spring 6 in a penetrating mode; nut locking part revolves including the spring clamp plate 8 that is used for the roof pressure release spring 6 and revolves soon on valve rod 3 and be located spring clamp plate 8 and deviate from the lock nut 9 of pressure release spring 6 one side, for further realizing compressing tightly fixed to pressure release spring 6, prevents to take place to become flexible when receiving the high impact, nut locking part still including can revolve twist soon on valve rod 3 and be located lock nut 9 and deviate from the back nut 10 of spring clamp plate 8 one side.
In order to ensure that the pressure relief chamber 13 in fig. 3 can quickly relieve pressure when the internal air pressure is too high without affecting opening, in this embodiment, three pressure relief holes 4 are formed in the disc-shaped seat body 1, in this embodiment, the three pressure relief holes 4 share one pressure relief valve plate 5, and on one hand, when the pressure relief valve plate 5 is opened or closed, the three pressure relief holes 4 can be opened or closed simultaneously; on the other hand, the number of the pressure relief valve plates 5 is reduced, and the structure of the valve seat is simplified. Of course, in other embodiments, each pressure relief hole may be provided with a pressure relief valve plate.
In addition, the number of the valve rods 3 is three, and when three pressure relief holes 4 share one pressure relief valve plate 5, the three valve rods 3 penetrate through the same pressure relief valve plate 5 to play a certain guiding role on the pressure relief valve plate 5. Of course, in other embodiments, each valve rod may also pass through one pressure relief valve plate, that is, the number of the pressure relief holes, the pressure relief valve plates, the pressure relief springs and the valve rods are kept consistent.
The disc-shaped seat body 1 is also provided with an air supply valve which is provided with a corresponding air supply hole 17 and comprises an air supply spring rod 18 movably arranged on the disc-shaped seat body 1 and an air supply valve plate 16 arranged on the large-diameter section of the disc-shaped seat body 1, one end of the air supply spring rod 18 penetrates into the large-diameter section of the disc-shaped seat body 1 and is matched with the disc-shaped seat body 1 in a blocking way, the other end of the air supply spring rod 18 is sleeved with an air supply spring 19, one side of the air supply spring 19, far away from the disc-shaped seat body 1, is provided with an elastic pressing plate, and one side of the air supply spring rod 18, far away from the air supply spring 19, is inserted with a split pin 20 so as to compress and fix the air supply spring 19. The whole setting of gulp valve is on the major diameter section of explosion chamber disk seat, is located the radial outside of relief valve 2 promptly, staggers each other at the gas passage of circuit breaker switching-on and separating brake process this moment, and the gas passage of two in-process is shown as the arrow in figure 2, and arrow A represents the pressure release passageway, and arrow B represents the tonifying qi passageway. In the process of opening and closing, elements in the two parts act independently and do not interfere with each other.
According to the arc extinguish chamber valve seat, the nut locking part used for compressing the pressure relief spring is spirally arranged at one end, away from the pressure relief valve plate, of the valve rod, the pre-compression amount of the pressure relief spring can be adjusted by screwing the nut locking part, namely the pre-tightening pressure and the working pressure of the pressure relief spring can be adjusted, and further the pre-tightening pressure and the working pressure of the pressure relief valve plate can be adjusted, so that the air pressure in the arc extinguish chamber can be adaptively adjusted, the pressure and speed requirements of a circuit breaker in the process of breaking different currents are met, the arc extinguish chamber valve seat is suitable for arc extinguish chambers with different voltage grades, and the application occasion and the application range of the arc extinguish chamber valve seat are remarkably improved.
In the above embodiments, the nut locking component includes the back nut, and in other embodiments, the back nut may not be provided, and only the locking nut is provided, so that the impact resistance of the entire arc extinguish chamber valve seat is reduced.
In the above-mentioned embodiment, the gulp valve sets up on the major diameter section of explosion chamber disk seat, is located the radial outside of relief valve, and in other embodiments, the gulp valve also can set up on the minor diameter section of explosion chamber disk seat, is located the radial inboard of relief valve.
The embodiment of the arc extinguish chamber provided by the invention comprises the following components: the arc extinguish chamber is a self-energy arc extinguish chamber, and as shown in fig. 3, the arc extinguish chamber comprises a cylinder 25, wherein a fixed seat 26, a movable contact 11 and a static contact 12 are coaxially and fixedly arranged in the cylinder 25, the fixed seat 26 is in a cylindrical shape, and a valve seat is fixedly arranged in the fixed seat. The moving contact 11 comprises a moving main contact 21 and a moving arc contact 22, the moving contact 11 is also provided with a pressure air chamber 13 and a thermal expansion chamber 14, and a one-way valve 27 is arranged between the pressure air chamber 13 and the thermal expansion chamber 14; the stationary contact 12 comprises a stationary main contact 23 and a stationary arcing contact 24. The structure of the valve seat is the same as that of the valve seat of the arc extinguish chamber in the above embodiment, and the structure described in the above embodiment is directly cited in the structure of the valve seat.
The process of the arc extinguish chamber for switching off operation of medium and large current of the load is as follows: at the earlier stage of the opening process, the movable main contact 21 is separated from the static main contact 23, but the movable arc contact 22 is not separated from the static arc contact 24, along with the movement of the movable contact 11, the volume of the air compression chamber 13 is gradually reduced, so that the air pressure in the air compression chamber 13 is increased, under the action of the air pressure in the air compression chamber 13, the one-way valve 27 is opened, and the air in the air compression chamber 13 enters the thermal expansion chamber 14; at the later stage of the opening process, the moving arc contact 22 and the static arc contact 24 are separated from each other, when the moving arc contact and the static arc contact are separated, the large-energy electric arc caused by medium and large currents enables the air pressure in the thermal expansion chamber 14 to increase suddenly, when the air pressure in the thermal expansion chamber 14 increases to a certain degree, the check valve 27 between the thermal expansion chamber 14 and the pressure air chamber 13 is extruded by the air in the thermal expansion chamber 14 to be closed, the air pressure in the thermal expansion chamber 14 increases, when the electric arc current flows through zero, the high-pressure air stored in the thermal expansion chamber 14 extinguishes the electric arc, and the moving contact 11 continues to move downwards under the driving of the operating mechanism. Moving contact 11 is in the motion process, and the volume of air compression chamber 13 diminishes gradually, and the gas pressure in it increases gradually, and when gas pressure exceeded the operating pressure of pressure release valve block 5 in air compression chamber 13, pressure release valve block 5 moved left and compressed pressure release spring 6 for the pressure release passageway is opened, and high-pressure gas in the air compression chamber 13 just discharges from pressure release passageway, makes the interior too high pressure of air compression chamber 13 obtain the release. Once the pressure relief valve plate 5 is opened, the pressure for continuously opening the brake is not very high, so that the pressure relief spring 6 is not required to have too much energy, the output work of the operating mechanism is small, and after the pressure in the air compression chamber 13 is released, the pressure relief valve plate 5 is restored to a closed state under the action of the pressure relief spring 6 to prepare for the next brake closing operation.
The arc extinguish chamber carries out the opening process of the load small current: when the moving contact and the static contact are separated, the energy of the electric arc generated is small, the gas pressure in the thermal expansion chamber 14 is small, the gas pressure in the gas compression chamber 13 is large, the check valve 27 between the thermal expansion chamber 14 and the gas compression chamber 13 is opened, the gas in the gas compression chamber 13 enters the thermal expansion chamber 14 to extinguish the small-current electric arc, and the phenomena of interception and high overvoltage generation cannot occur. After the electric arc is extinguished, higher air pressure is kept between the movable contact and the fixed contact, so that the breaking failure caused by breakdown can be avoided. In the whole process, the pressure relief valve plate 5 keeps a closed state, and the pressure relief channel is not opened.
During closing operation, the moving contact 11 moves under the action of the operating mechanism, so that the volume of the air compression chamber 13 is gradually increased, further the gas pressure in the air compression chamber 13 is gradually reduced, at the moment, the gas pressure outside the air compression chamber 13 is greater than the gas pressure in the air compression chamber 13, at the moment, the gas compensation valve plate 16 is subjected to pressure and moves rightwards under the limitation of the gas compensation spring rod 18, so that a gas compensation channel is opened, and external gas enters the air compression chamber 13 according to the gas compensation channel indicated by an arrow B in fig. 2 to be compensated. When closing is finished, the internal and external air pressure borne by the air supply valve plate 16 is balanced, and the air supply valve plate restores the closed state under the elastic action of the air supply spring 19 to prepare for the next opening operation.
The arc extinguish chamber realizes dynamic adjustment of the pressure relief value within the range of 500N to 1200N by adjusting the pre-compression amount of the pressure relief spring in the arc extinguish chamber valve seat, and the range can meet the requirements of different voltage grades, and can be suitable for the voltage grades of 420kv, 550kv, 800kv and the like.
Claims (15)
1. The utility model provides an explosion chamber disk seat, includes the disk pedestal, the disk pedestal have be used for with the moving contact sliding seal complex outer peripheral face of explosion chamber and with the central pull rod sliding seal complex centre bore of moving contact, be equipped with the relief valve on the disk face of disk pedestal, its characterized in that: the pressure release valve comprises a valve rod movably arranged on the disk-shaped seat body in a penetrating manner, the disk-shaped seat body is provided with a pressure release hole with two through sides, and the pressure release valve also comprises a pressure release valve plate arranged on one side of the disk-shaped seat body and used for plugging the pressure release hole; one end of the valve rod penetrates through the pressure relief valve plate and is in blocking fit with the disk-shaped seat body, the other end of the valve rod is sleeved with a pressure relief spring, the pressure relief valve plate is tightly pressed on the disk-shaped seat body under the elastic action of the pressure relief spring to block the pressure relief hole, and a nut locking component for tightly pressing the pressure relief spring is spirally arranged at one end, back to the pressure relief valve plate, of the pressure relief spring on the valve rod; the arc extinguish chamber valve seat is fixedly installed in the arc extinguish chamber cylinder.
2. Arc chute valve seat according to claim 1, characterized in that: the disc-shaped seat body is provided with more than two pressure relief holes.
3. Arc chute valve seat according to claim 2, characterized in that: each pressure relief hole shares one pressure relief valve plate.
4. Arc chute valve seat according to claim 3, characterized in that: the valve rod is equipped with more than two, and each valve rod all wears to adorn in the pressure release spring, nut locking part is including being used for the roof pressure release spring's spring clamp plate with twist soon lock nut who twists on the valve rod and be located spring clamp plate and deviate from pressure release spring one side.
5. Arc chute valve seat according to claim 4, characterized in that: the nut locking component also comprises a back-tightening nut which is screwed on the valve rod and is positioned on one side of the locking nut, which deviates from the spring pressure plate.
6. Arc chute valve seat according to any of claims 1-5, characterized in that: and an air supply valve is also arranged on the disk-shaped seat body and is positioned on the inner side or the outer side of the pressure release valve in the radial direction.
7. Arc chute valve seat according to claim 6, characterized in that: the outer peripheral surface of the arc extinguish chamber valve seat is in a step shape and is provided with a large-diameter section and a small-diameter section, the outer peripheral surface of the large-diameter section forms an outer peripheral surface which is matched with a movable contact seat of the arc extinguish chamber in a sliding sealing mode, the pressure release valve is arranged on the small-diameter section, and the air supply valve is arranged on the large-diameter section.
8. The utility model provides an arc extinguishing chamber, includes the barrel, and fixed mounting has the disk seat in the barrel, and the outside sliding seal of disk seat is equipped with the moving contact, and the disk seat includes the disk pedestal, and the disk pedestal has the moving contact sliding seal complex outer peripheral face that is used for with the arc extinguishing chamber and with the central pull rod sliding seal complex centre bore of moving contact, is equipped with relief valve, its characterized in that on the quotation of disk pedestal: the pressure release valve comprises a valve rod movably arranged on the disk-shaped seat body in a penetrating manner, the disk-shaped seat body is provided with a pressure release hole with two through sides, and the pressure release valve also comprises a pressure release valve plate arranged on one side of the disk-shaped seat body and used for plugging the pressure release hole; one end of the valve rod penetrates through the pressure relief valve plate and is in blocking fit with the disk-shaped seat body, the other end of the valve rod is sleeved with a pressure relief spring, the pressure relief valve plate is tightly pressed on the disk-shaped seat body under the elastic action of the pressure relief spring to block the pressure relief hole, and a nut locking component used for tightly pressing the pressure relief spring is further spirally arranged at one end, back to the pressure relief valve plate, of the pressure relief spring on the valve rod.
9. The arc chute of claim 8, characterized in that: the disc-shaped seat body is provided with more than two pressure relief holes.
10. Arc chute according to claim 9, characterized in that: each pressure relief hole shares one pressure relief valve plate.
11. Arc chute according to claim 10, characterized in that: the valve rod is equipped with more than two, and each valve rod all wears to adorn in the pressure release spring, nut locking part is including being used for the roof pressure release spring's spring board and revolve wrong lock nut who just lies in spring board and deviate from pressure release spring one side on the valve rod.
12. Arc chute according to claim 11, characterized in that: the nut locking component also comprises a back-tightening nut which is screwed on the valve rod and is positioned on one side of the locking nut, which deviates from the spring pressure plate.
13. Arc chute according to any one of claims 8-12, characterized in that: and an air compensating valve is also arranged on the disk-shaped seat body and is positioned on the inner side or the outer side of the pressure release valve in the radial direction.
14. Arc chute according to claim 13, characterized in that: the outer peripheral surface of the valve seat is in a step shape and is provided with a large-diameter section and a small-diameter section, the outer peripheral surface of the large-diameter section forms an outer peripheral surface which is in sliding sealing fit with a movable contact seat of the arc extinguish chamber, the pressure relief valve is arranged on the small-diameter section, and the air compensating valve is arranged on the large-diameter section.
15. Arc chute according to claim 14, characterized in that: the cylindrical fixing seat is coaxially and fixedly arranged in the cylinder, the small-diameter section of the valve seat is positioned in the cylindrical fixing seat, the large-diameter section of the valve seat is positioned outside the cylindrical fixing seat, and the valve seat is connected with the inner wall surface of the cylindrical fixing seat through the outer peripheral surface of the small-diameter section of the valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910164468.7A CN111668061B (en) | 2019-03-05 | 2019-03-05 | Explosion chamber disk seat and explosion chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910164468.7A CN111668061B (en) | 2019-03-05 | 2019-03-05 | Explosion chamber disk seat and explosion chamber |
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| Publication Number | Publication Date |
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| CN111668061A CN111668061A (en) | 2020-09-15 |
| CN111668061B true CN111668061B (en) | 2022-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910164468.7A Active CN111668061B (en) | 2019-03-05 | 2019-03-05 | Explosion chamber disk seat and explosion chamber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113690093B (en) * | 2021-08-25 | 2023-01-24 | 西安西电开关电气有限公司 | Circuit breaker |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107146737A (en) * | 2017-05-10 | 2017-09-08 | 国家电网公司 | A kind of arc-chutes moving contact and arc-chutes and primary cut-out |
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|---|---|---|---|---|
| CN1148772C (en) * | 2002-05-15 | 2004-05-05 | 宁波天安（集团）股份有限公司 | Self-energized thermal expansion type SF6 arc-extinguishing chamber of circuit breaker |
| CN2546996Y (en) * | 2002-05-15 | 2003-04-23 | 宁波天安（集团）股份有限公司 | Thermal expanding self-energy sulfur hexafluoride breake arc-chutes |
| CN201315287Y (en) * | 2008-11-19 | 2009-09-23 | 平高集团有限公司 | Arc extinguish chamber of double-chamber thermal expanding self-extinguishing type SF6 circuit breaker and an air cylinder thereof |
| CN201514893U (en) * | 2009-08-14 | 2010-06-23 | 中国西电电气股份有限公司 | Thermal-expansion gas arc-extinguishing chamber |
| JP5592780B2 (en) * | 2010-12-24 | 2014-09-17 | 株式会社東芝 | Gas circuit breaker |
| CN202373510U (en) * | 2011-11-16 | 2012-08-08 | 北京北开电气股份有限公司 | Device for stabilizing one-way valve of expansion chamber in circuit breaker |
| CN202695268U (en) * | 2012-05-28 | 2013-01-23 | 北京北开电气股份有限公司 | Novel pressure release valve plate stabilizing device for tank circuit breaker |
| CN103745873B (en) * | 2014-01-28 | 2015-10-14 | 国家电网公司 | A kind of electric power charged intelligent making-up air device of SF6 circuit breaker and supplementing method for air thereof |
| CN203787345U (en) * | 2014-04-03 | 2014-08-20 | 国家电网公司 | Self energy arc-blasting circuit breaker |
| KR101763451B1 (en) * | 2014-04-09 | 2017-08-01 | 현대일렉트릭앤에너지시스템(주) | Circuit breaker of gas insulation switchgear |
| JP6439521B2 (en) * | 2015-03-16 | 2018-12-19 | 富士電機株式会社 | Puffer type gas circuit breaker |
| CN105977096A (en) * | 2016-06-24 | 2016-09-28 | 广州白云电器设备股份有限公司 | SF6 circuit breaker arc extinguish chamber |
| CN205789704U (en) * | 2016-06-30 | 2016-12-07 | 中国西电电气股份有限公司 | A kind of pressure-regulating device of air pressing type arc-chutes |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107146737A (en) * | 2017-05-10 | 2017-09-08 | 国家电网公司 | A kind of arc-chutes moving contact and arc-chutes and primary cut-out |
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