KR20110120727A - Motor spring operator for switchgear - Google Patents

Motor spring operator for switchgear Download PDF

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Publication number
KR20110120727A
KR20110120727A KR1020100040275A KR20100040275A KR20110120727A KR 20110120727 A KR20110120727 A KR 20110120727A KR 1020100040275 A KR1020100040275 A KR 1020100040275A KR 20100040275 A KR20100040275 A KR 20100040275A KR 20110120727 A KR20110120727 A KR 20110120727A
Authority
KR
South Korea
Prior art keywords
compression spring
spring
load
manipulator
electric
Prior art date
Application number
KR1020100040275A
Other languages
Korean (ko)
Inventor
정재웅
Original Assignee
엘에스산전 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘에스산전 주식회사 filed Critical 엘에스산전 주식회사
Priority to KR1020100040275A priority Critical patent/KR20110120727A/en
Publication of KR20110120727A publication Critical patent/KR20110120727A/en

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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
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/40—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • 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
    • H01H33/42—Driving mechanisms
    • 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
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices

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  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

The present invention relates to an electric spring manipulator of a breaker. The present invention, the load cell is installed inside the electric spring manipulator or the strain gauge is installed in the chain can detect the load change of the compression spring in real time, it is possible to easily and accurately set the initial position of the compression spring In addition, it is possible to prevent the fatal accident in advance by detecting the load change of the compression spring in real time during the operation of the breaker to maintain a stable operation of the breaker.

Description

Electric spring manipulator of circuit breaker {MOTOR SPRING OPERATOR FOR SWITCHGEAR}

The present invention relates to an electric spring manipulator of the breaker, and more particularly to an electric spring manipulator of the breaker capable of detecting in real time the spring load change of the electric spring manipulator used in the ultra-high pressure breaker.

In general, a breaker refers to a device that cuts off a current in case of an accident such as grounding or short-circuit in a load, a transmission system or an electric circuit. The breaker is tasteless with excellent insulation properties. Odorless. In a tank-type metal container filled with a non-toxic inert, high insulating gas, the shield is assembled with insulation. And the breaker is configured to be able to open and close the converter in the normal use state manually, or to open and close at a long distance by an electric operation device outside the metal container. And it protects the power system and the load by automatically cutting off the circuit in case of overload and short circuit.

The circuit breaker includes a fixed contactor, a movable contactor, an operating mechanism unit for mechanically separating or contacting the contact between the fixed contactor and the movable contactor, and a charging mechanism unit for operating the operating mechanism unit.

The actuating mechanism portion includes an injection spring, a link mechanism, a blocking spring, a camshaft, and the like. The charging mechanism part includes a drive motor for rotating the camshaft, a reduction gear assembly, a charging gear, and the like.

Such a circuit breaker normally causes the fixed contactor and the movable contactor to contact each other so that a current flows. On the other hand, when a large current flows due to a failure in the line, the user opens the link mechanism by pressing the cutoff button or operating the cutoff blade, and the opening / closing shaft rotates in the opposite direction to the closing by the tension force of the cutoff spring. By cutting the contact between the fixed contact and the movable contact to cut off the current.

Here, the breaker may be classified into an air operation method, a hydraulic operation method or a spring operation method according to the driving method of the manipulator for operating the breaker.

The air manipulator has a simple structure and a large operating force, but requires the operation of compressed air, difficult maintenance of the manipulator, and a performance deterioration according to temperature.

The manipulator of the hydraulic operation method has a high cost as it is composed of a hydraulic cylinder, a pump, a hydraulic accumulator and the like to maintain the air tightness by ultra precision processing. In addition, the oil leakage phenomenon caused by the long-term use, the operation time of the breaker and the speed of the movable contact occurs, the breaking performance is reduced, there is a disadvantage that can not perform a reliable current blocking operation.

The spring operation method of the manipulator is to insert or block the breaker by using the spring force of the compression spring, so it is easier to maintain the operation force and manage the operation device compared to the air and hydraulic operation method, and the quick response speed by the mechanical configuration There is an advantage that can minimize the variation in response time.

1 is a schematic diagram for explaining a conventional manipulator of the spring operation method. Referring to this, the manipulator of the spring operation method (hereinafter, abbreviated as an electric spring manipulator) includes an electric motor 1, a drive gear 2 provided on a rotating shaft of the electric motor 1, and the drive gear ( 2) the reduction gear 3 engaged with the gear, the charging gear 4 meshed with the reduction gear 3, and the expansion and contraction of the breaker gear 4 in accordance with the rotation of the charging gear 4 is compressed to induce the closing or closing operation of the circuit breaker. Compression spring (5) made of a coil spring, a housing (6) surrounding the compression spring (5) and supporting one end of the compression spring (5), and a sliding spring inserted in the housing (6) and the compression spring ( A cover 7 supporting the other end of 5), a connecting rod 8 screwed to the cover 7, and one end coupled to the connecting rod 8 and the other end eccentric to the charging gear 4 And a chain 9 which is forkably coupled.

The compression spring used in the conventional electric spring manipulator, such as to form an energy source to operate the manipulator is to play the most important role in the driving mechanism of the electric spring manipulator. Therefore, the initial position of the compression spring 5 and the load change generated during long time use may be a very important factor in terms of the reliability of the breaker as well as the reliability of the electric spring manipulator.

However, in the conventional electric spring manipulator as described above, by using the compression jig 10 as shown in Figure 2 by rotating the cover 7 in the spring compression direction as shown in Figure 2 the initial position of the compression spring (5) Will be set. Here, the initial position of the compression spring 5 is adjusted by converting the value obtained through the load test of the compression spring 5 into a length. However, by setting the initial position of the compression spring 5 by converting the load into length as described above, it is difficult to accurately reflect the load of the compression spring 5, and the compression spring 5 repeats the continuous stretching operation. As a result, the spring deformation occurs, and even if the spring length is changed, a large accident may occur without detecting the breaker and preventing the breaker from operating smoothly. In addition, when the compression spring 5 is compressed to the insertion operation possible position, even if the initial load value is not known and the spring length is changed, there is a problem that it is impossible to correct the compression spring 5 to the initial state.

An object of the present invention is to improve the spring load setting method of the electric spring manipulator for the ultra-high pressure breaker to accurately set the initial load and to provide a motorized spring manipulator of the breaker capable of monitoring the change of the spring load in real time.

In order to achieve the object of the present invention, a motor; A transmission unit coupled to the motor to transfer power of the motor; A compression spring coupled to the transmission unit to induce closing and breaking operations of the circuit breaker; A housing into which the compression spring is inserted and which supports one end of the compression spring; A cover slidingly inserted into the housing and supporting the other end of the compression spring; A connecting rod screwed to the cover; One end is coupled to the connection rod and the other end is eccentrically coupled to the transmission part; And a load sensing unit capable of detecting the load of the compression spring in real time.

Here, the load sensing unit may be formed in at least one of both ends of the compression spring is formed of a load cell for detecting the degree of compression of the compression spring.

In addition, a spacer having a predetermined thickness and strength may be further provided between the load cell and the compression spring.

Here, the load sensing unit may be formed in the strain gauge to be installed at both ends or the middle of the chain to detect the tensile strength received by the chain.

Here, the load display unit for displaying the content detected by the load detection unit to the outside may be further provided.

The electric spring manipulator of the circuit breaker according to the present invention has a load cell installed inside the electric spring manipulator or a strain gauge installed in the chain to detect a change in load of the compression spring in real time, thereby determining the initial position of the compression spring. Not only can be easily and accurately set, but also the load change of the compression spring can be sensed in real time during the operation of the breaker to keep the operation of the breaker stable to prevent fatal accidents.

1 is a cross-sectional view showing a state before compression in a conventional electric spring manipulator,
2 is a cross-sectional view showing a compressed state in the electric spring manipulator according to FIG.
3 is a cross-sectional view showing a state before compression in the electric spring manipulator according to the present invention,
Figure 4 is a block diagram showing the configuration of the control board in the electric spring manipulator according to FIG.
5 is a cross-sectional view showing a compressed state in the electric spring manipulator according to FIG.
6 is a cross-sectional view showing an example of changing the installation position of the load cell in the electric spring manipulator according to FIG.
7 is a cross-sectional view showing another embodiment of the electric spring manipulator according to FIG.

Hereinafter, the electric spring manipulator of the circuit breaker according to the present invention will be described in detail based on the embodiment shown in the accompanying drawings. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

Figure 3 is a cross-sectional view showing a state before compression in the electric spring manipulator according to the present invention, Figure 4 is a block diagram showing the configuration of the control plate in the electric spring manipulator according to Figure 3, Figure 5 is a electric spring manipulator according to FIG. This section shows the compressed state.

Referring to FIG. 3, the spring manipulator (hereinafter, referred to as an electric spring manipulator) includes an electric motor 110, a drive gear 120 provided on a rotating shaft of the electric motor 110, and the drive. The reduction gear 130 meshed with the gear 120, the charging gear 140 meshed with the reduction gear 130, and the expansion gear according to the rotation of the charging gear 140 to induce the closing or closing operation of the circuit breaker. The compression spring 150, the housing 160 accommodating the compression spring 150 and supporting one end of the spring 150, and the sliding spring is slidably inserted into the housing 160. A cover 170 supporting the other end, a connecting rod 180 screwed to the cover 170, one end is coupled to the connection rod 180, and the other end is eccentrically coupled to the charging gear 140. Located at one end of the chain 190 and the compression spring 150, the load of the compression spring 150 It comprises a load cell (load cell) (200) which is installed in the housing 160 to sense.

Here, the load cell 200 has a predetermined thickness and strength at the side where the load cell 200 and the compression spring 150 contact as shown in FIG. 3 so that the load cell 200 does not directly contact the compression spring 150. It may be desirable to interpose the spacer 300 made of a material having the material to protect the load cell 200.

In addition, the load cell 200 may have a through hole 210 formed in the center thereof so as to uniformly detect the load of the compression spring 150 so that the chain 190 may pass therethrough. .

In addition, the load cell 200 is electrically connected to the control plate 20 to which the appropriate load range of the compression spring 150 is input, and the control plate 20 is a load display unit (not shown) provided outside the breaker. ) Can be electrically connected.

In this case, the control panel 20 compares the measured value transmitted through the load cell 200 with the input unit 21 that receives the input, the measured value received through the input unit 21, and the reference value already input. Determination unit 22 for determining whether the load of the compression spring 150 is appropriate, and instructs to display a danger signal when the load of the compression spring 150 measured according to the determination unit 22 is out of an appropriate range It may be made of a command unit (23).

The electric spring actuator of the circuit breaker according to the present invention as described above has the following effects.

In the present invention, the process of assembling the electric spring manipulator is similar to the prior art. That is, by rotating the cover 170 in the spring compression direction using the compression jig 10 to set the initial position of the compression spring 150 as shown in FIG.

However, in the present invention, as the load cell 200 is installed inside the electric spring manipulator, that is, inside the housing 160, the load of the compression spring 150 may be detected by the load cell 200 in real time. do. Accordingly, not only the initial position of the compression spring 150 can be easily and accurately set, but also the load change of the compression spring 150 is sensed in real time even during the operation of the breaker, thereby stably maintaining the operation of the breaker. It can prevent fatal accidents.

In addition, when the load display unit (not shown) is connected to the load cell 200 and provided, the load change of the compression spring 150 is displayed to the outside through the load display unit (not shown). ) Can be adjusted at the appropriate time. Accordingly, the load of the compression spring 150 can be always maintained properly so that the breaker or closing operation of the breaker can be made more smoothly.

Meanwhile, the load cell 200 may be installed at the fixed end 161 of the housing 160 as shown in FIG. 3, but may be installed at the cover 170 as shown in FIG. 6.

If there is another embodiment of a method for detecting a load change of the compression spring in the electric spring manipulator according to the present invention.

That is, in the above-described embodiment, the load cell is installed inside the housing to directly detect the load generated when the compression spring is compressed. However, the present embodiment is the middle (or figure) of the chain 190 as shown in FIG. Although not shown, a strain gage 400 is installed between the connecting rod and the chain or between the chain and the charging gear so that the chain 190 pulls the connecting rod 180 by the electric motor 110. It is to monitor the load of the compression spring 150 in real time by detecting a change in tensile force generated when.

In this case, the load of the compression spring 150 can be sensed in real time, so that the breaker or closing operation of the breaker can be performed smoothly. And even in this case, the basic configuration of the electric spring manipulator is similar to the above-described embodiment, so a detailed description thereof will be omitted.

150: compression spring 160: housing
170: cover 180: connection rod
190: chain 200: load cell
400: Strain Gauge

Claims (5)

motor;
A transmission unit coupled to the motor to transfer power of the motor;
A compression spring coupled to the transmission unit to induce closing and breaking operations of the circuit breaker;
A housing into which the compression spring is inserted and which supports one end of the compression spring;
A cover slidingly inserted into the housing and supporting the other end of the compression spring;
A connecting rod screwed to the cover;
One end is coupled to the connection rod and the other end is eccentrically coupled to the transmission part; And
Electric spring manipulator of a circuit breaker comprising a; load detection unit for detecting the load of the compression spring in real time. The method of claim 1, wherein the load detection unit,
An electric spring manipulator of a circuit breaker comprising a load cell installed on at least one of both ends of the compression spring to detect the degree of compression of the compression spring. The method of claim 2,
And a spacer having a predetermined thickness and strength between the load cell and the compression spring. The method of claim 1, wherein the load detection unit,
An electric spring manipulator of a circuit breaker, which is provided at both ends of the chain or in the middle and is formed of a strain gauge for detecting the tensile strength received by the chain. The method according to any one of claims 1 to 4,
The electric spring manipulator of the circuit breaker further comprises a load display unit for displaying the content detected by the load detection unit to the outside.
KR1020100040275A 2010-04-29 2010-04-29 Motor spring operator for switchgear KR20110120727A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100040275A KR20110120727A (en) 2010-04-29 2010-04-29 Motor spring operator for switchgear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100040275A KR20110120727A (en) 2010-04-29 2010-04-29 Motor spring operator for switchgear

Publications (1)

Publication Number Publication Date
KR20110120727A true KR20110120727A (en) 2011-11-04

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Application Number Title Priority Date Filing Date
KR1020100040275A KR20110120727A (en) 2010-04-29 2010-04-29 Motor spring operator for switchgear

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KR (1) KR20110120727A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109887799A (en) * 2019-03-12 2019-06-14 平高集团有限公司 Spring operating mechanism and its adjusting tooling
CN109979784A (en) * 2019-03-12 2019-07-05 平高集团有限公司 Spring operating mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109887799A (en) * 2019-03-12 2019-06-14 平高集团有限公司 Spring operating mechanism and its adjusting tooling
CN109979784A (en) * 2019-03-12 2019-07-05 平高集团有限公司 Spring operating mechanism

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