CN2066629U - Double indicator discharge counter - Google Patents

Abstract

The utility model discloses a discharge counter matched with a lightning arrester. The utility model uses a double indicator to count by a counting gear cluster. A carrying indicator is added, ensures the accuracy of the counting, and enhances the monitoring capacity for the operating status of the lightning arrester and the safety factor of the electric network. Thereby, the utility model overcomes the defects that one counting cycle of the existing common single indicator discharge counter in using can only count 10 times to affect the accuracy of the monitoring, etc. The use of the utility model can change the passive situation for monitoring the operating status of the lightning arrester at the always lightning zone or in the thunderstorm season.

Description

Double indicator discharge counter

The utility model is the discharge counter of record lightning arrester action frequency, is particularly suitable for and the supporting use of 3～330 kilovoltage grade lightning arresters.

In order to ensure the safe operation of electrical networks at different levels, the relevant electric administrative department of country was once made stipulations, during the lightning arrester of 35 kilovolts of all installations and above electric pressure.Must install discharge counter additional, to monitor whether regular event of operating lightning arrester.At present the discharge counter produced of China is round dial, simple pointer indication, and for the ease of check more at a distance, reading.Letter disk only is provided with 0～90 number.When the counter action frequency surpassed 10 times, pointer was again since 0 cycle count.The JS-8 type discharge counter that generally uses as present power department just belongs to this type.Though it is bigger that this type of counter has numeral, numeral indicating mechanism characteristic of simple, but because a circulation can only be counted 10 actions at most, and no-carry (cycle-index indication) device, therefore in multiple district of thunder and lightning or thunderstorm season, thunder and lightning is frequent or the thunderstorm weather duration is longer, the lightning arrester continuous action is above ten times, even when surpassing 20 times, owing to do not allow operator on duty's approaching discharge counter that is installed in the outdoor band high pressure that is moving under this kind weather conditions, just can watch and write down later the number of times of the indicated lightning arrester action of discharge counter so can only treat thunderstorm.This moment is if counter arm 0 points to 3 before the thunderstorm, has lightning arrester moved 3 times altogether in this thunderstorm process so? still 13 times also or 23 times? have no way of accurately learning, if the forward and backward pointer of thunderstorm all refers at same position, does not lightning arrester have action in this thunderstorm process so? still moved 10 times, 20 times ... also have no way of learning, (whether operate as normal can not be leaned on intuitive judgment to lightning arrester in the charging operation, and the maintenance after general employing has a power failure is tested and judged).This just gives and monitors that exactly the lightning arrester operating state brings difficulty, if lightning arrester work is undesired or lost efficacy, and does not in time find, will and use the frequent operation overvoltage workplace of lightning arrester work the mischief to high-voltage fence.The explosion accident of lightning arrester in charging operation as China happens occasionally takes place owing to fail to find and in time change these out of order lightning arresters by monitoring.The generation of these accidents gently then influences some areas, heavily then feeds through to some ground, city, causes power failure, stops production, and brings irreparable damage for the development of the national economy, people's lives and development of industry and agriculture.

The purpose of this utility model is to design a kind of discharge counter with two pointer structures, with the operating state that realizes accurately, lightning arrester in the charging operation is handled in monitoring reliably, for the lightning arrester authentic communication that provides whether working properly is provided, so that in time find and more change jobs abnormal lightning arrester, guarantee electric power netting safe running and frequent superpotential place operate as normal thereby reach.The precision maneuver number of times of lightning arrester is provided to administration of power networks at different levels department simultaneously.As the foundation of working out, adjust and improve the power grid security coefficient.

Solution of the present utility model is to increase a carry pointer and driven on the basis of present widely used JS-8 type discharge counter (Xi'an High-Voltage Electric Ceramics Factory's production), monodentate and carry gear train, carry gear in this gear train moves with driving gear (counting gear) with the ratio of 1:10, promptly count the every action of pointer 10 times, this gear set drive carry pointer advances one (i.e. action once), (this moment, the carry pointer pointed to 0 position) and pointer are again from 0 cycle count after counting pointer every action 100 times, with the purpose that realizes that the multiple district of thunderstorm season and thunder and lightning accurately monitors the lightning arrester operating state, the carry tooth adopts axle sleeve to be placed on the driving gear shaft, therefore, in order to prevent that the frictional force that the carry tooth passes through between its gear shaft and (carry gear) axle sleeve because of the motion of driving tooth from making the carry gear produce misoperation, and adopt a location reed to be located in assigned address, have only when individual gears drives carry, just can overcome the resistance of retainer spring sheet and drive pointer and do the carry motion, thus guarantee carry accurately and reliability.Because the utility model has increased by a group carry gear, for the operational forces of corresponding increase shift fork, increases by 5～10% circles on the basis of the former solenoid number of turn, normally moves to guarantee each gear.The utility model is promptly realized its goal of the invention by such scheme.

The invention has the advantages that.Owing to adopted two pointer countings, increased the carry indication, having overcome count cycle of simple pointer discharge counter only can count 10 times, influence defectives such as monitoring accuracy, improved the ability of monitoring lightning arrester working condition, thereby can accurate data be provided and improve the coefficient of safety of electrical network to electrical network, and can change the multiple district of present thunder and lightning and thunderstorm season passive situation the lightning arrester working state monitoring.

Description of drawings

Fig. 1 is the utility model schematic appearance (front view);

Fig. 2 the utility model structural representation (after partial sectional view, double dot dash line represent that partly this part shell takes down, inner structural representation);

Fig. 3 is electromagnetic counter 2 structural representations;

Fig. 4 is shift fork, gear train and retainer spring sheet relative position and structural representation;

Fig. 5 is the utility model fundamental diagram.

Among the figure: 1 is outer cover, and 2 is counting device, 3, ring flange, 4, base plate, 5,6 be binding post, 7, valve block, 8, capacitor, 9, bridge rectifier, 10, solenoid, 11, gear train, 12, hour hand, 13, minute hand, 14, reading dial, 15, shift fork, 16, driving gear, 17, idler gear, 18, individual gears, 19, driven gear (carry gear), 20, housing screw, 21, spring leaf, 22, shift fork armature, BL is a lightning arrester.

Embodiment

In the present embodiment: outer cover 1, ring flange 3, base plate 4, binding post 5,6, reading dial 14, shift fork 15, driving gear 16 etc., its physical dimension and material all with JS-8 type discharge counter in corresponding zero, parts are identical.Valve block 7 adopts carborundum (also can adopt zinc oxide) to make.The nominal residual voltage is: 100A 〉=200V, and 5000A≤1000V, physical dimension is also identical with JS-8 type valve block, and capacitor 8 capacity are 10 μ f, 400V, rectifier 9 is the silicon dridge type rectifier, specification is 5A/1200V.It is that the 13000 two stationary barrier spacings of enclosing gear trains 11 are 6mm that solenoid 10 adopts the coiling of 0.12mm enamelled wire, the number of turns, and adopts liner to fix; Driving gear 16, idler gear 17, individual gears 18, driven gear 19 adopt all that brass is stamped to form, transverse tooth thickness 1.3mm, radius of addendum R is 5mm, each module is also identical, and wherein: driving gear, idler gear and driven gear are 10 teeth, and individual gears 18 is a tooth; Gear two central shafts adopt copper pipe, and external diameter is φ 4mm.The axle sleeve external diameter φ 5mm of driven gear 19, internal diameter is φ 4.8 ± 0.02mm; Reading dial is fixed in the gear upper spacer by rivet, and hour hand 12 is long for 20mm, is stuck on the axle sleeve top of driven tooth (carry tooth) 19; Minute hand 13 length are 25mm, are stuck in the axle core top of driving tooth 16.Housing screw 20, specification are φ 3 * 10mm, retainer spring sheet 21

Portion is a spring wire, compresses (coupling mechanism force degree of adjusting before compressing) around a circle back by screw 20.Outer cover 1 is coupled to one by ring flange 3 and bolt and base plate 4; Electromagnetic counter 2 connects by bolt and the support that is fixed on the base plate 4.This discharge counter is serially connected with between lightning arrester BL and the ground wire and the supporting use of lightning arrester by binding post 5,6.These counter technical conditions meet JB2440-78 " discharge counter technical conditions " and GB declaration original text GB-* * * * " lightning arrester discharge counter " specification requirement.

When lightning arrester BL moves, by flow through simultaneously valve block 7 in the discharge counter of the impulse current of lightning arrester, produce a residual voltage at the valve block two ends, this residual voltage is through 8 chargings of 9 pairs of capacitors of silicon dridge type rectifier, and with direct current to 10 discharges of message register coil.Hold shift fork armature 22 and make magnetic core produce a magnetic force, thereby make shift fork 15 releases and make driving wheel 16 rotate a tooth (this moment, minute hand also rotated a numerical digit thereupon) along clockwise direction.Meanwhile drive corresponding in the counterclockwise direction rotation one tooth of idler gear 17 and individual gears 18, after magnetic force was eliminated, shift fork recovered former location state under the effect of return spring.This moment is not because individual gears 17 there is engagement with driven gear (carry gear) 19, so driven gear does not rotate under the effect of retainer spring sheet 21, when lightning arrester action 10 times (when minute hand is got back to 0 position), driving gear drive idler gear, individual gears are also rotated one-period.Individual gears 18 meshed and drove this gear with driven gear (carry gear) 19 and rotates a tooth position along clockwise direction this moment, drove hour hand 12 simultaneously and rotated numerical digits (carry).Like this perseveration, but enter next circulation again behind the utility model continuous counter 99 times, therefore have counting accurately, reliable characteristics.

Claims (2)

1, a kind of discharge counter, it is made of base plate, ring flange, outer cover, valve block, capacitor, bridge rectifier, electromagnetic counter, it is characterized in that gear train and spring spacer that the counting gear in the electromagnetic counter is made up of driving gear (counting gear), idler gear, individual gears and driven gear (carry gear) constitute; Pointer in the counting device then comprises counting and two pointers of carry, wherein counts pointer and connects by driving gear shaft core and driving gear and rotate with driving gear, and the carry pointer then is connected with this gear by the driven gear axle sleeve and with this gear rotation; The relation that driven gear then passes through individual gears, idler gear cooperates with driving gear and pressed 1: 10 is rotated.

2, by the described discharge counter of claim 1, it is characterized in that the modulus of each gear in the counting gear group is all identical with radius of addendum; Wherein the number of teeth of driving gear, idler gear and driven gear is 10 teeth, and the number of teeth of individual gears is 1 tooth.

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