JP2015167093A - Gas circuit breaker and adjustment method for closing operation spring thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas circuit breaker whose entire body can be reduced in height and also whose closing operation spring can be easily adjusted by a simple operation which does not increase workload.SOLUTION: A gas circuit breaker of the present invention has a configuration for solving the problem, in which: a spring operation unit for driving a movable contact includes a breaking operation spring, a closing operation spring, a breaking operation spring housing case for housing the breaking operation spring, and a closing operation spring housing case for housing the closing operation spring; and a sealed tank, a link mechanism and the spring operation unit are arranged on a straight line, the closing operation spring housing case is arranged above the closing operation spring housing case, and a working hole is formed in the closing operation spring housing case to allow working tools for adjusting spring force of the closing operation spring to be brought therein.

Description

  The present invention relates to a gas circuit breaker and a method of adjusting a closing operation spring, and more particularly, a gas suitable for adjusting a spring force in a closing operation spring as a driving force source for performing a closing operation of the gas circuit breaker. The present invention relates to a circuit breaker and a method for adjusting a spring for closing operation thereof.

  In general, in a gas circuit breaker, the circuit breaker contact must move between the open and closed positions at a high speed. Variations in the closing time are defined by the standard. One method of adjusting the variation in the closing time between the phases within a specified value is to adjust the initial setting value of the spring force of the closing operation spring. Adjustment of the initial setting value of the spring force of the closing operation spring is often performed by removing the closing operation spring portion from the gas circuit breaker.

  For this reason, in Patent Document 1, in the operation mechanism for the switching device, the spring force of the closing operation spring is not removed with a simple configuration without using a large dedicated jig. It is disclosed that it is possible to make adjustments.

  That is, in Patent Document 1, a spring support is disposed on the back surface of a spring receiver disposed on the end face of the closing operation spring, and a screw hole for a jack bolt is provided through the spring support, and this jack bolt is provided. By screwing the jack bolt into the screw hole, the spring receiver and the spring for closing operation are pushed down to create a gap between the spring holder support and the spring holder, and a spring force adjusting spacer is inserted into the gap. Further, it is disclosed that the spring force of the closing operation spring is adjusted by changing the usage height of the closing operation spring.

  On the other hand, it is required to reduce the transportation cost of the gas insulated switchgear, and for that purpose, it is required to transport the gas insulated switchgear in a container. In order to transport the gas insulated switchgear as a single container, it is a problem to reduce the overall height of the equipment.

  The problem of lowering the layer is normally provided with a closing operation spring storage case in which a closing operation spring is stored in a lower part of the gas circuit breaker and a blocking operation spring storage case in which a blocking operation spring is stored. This can be solved by arranging the existing spring actuator on the front surface of the gas circuit breaker and in line with the gas circuit breaker.

JP 2012-43733 A

  However, as described above, when the shut-off operation spring is arranged on the upper part of the closing operation spring, even if an attempt is made to adjust the spring force of the closing operation spring, it is blocked by the shut-off operation spring and accesses the closing operation spring. Will be difficult. This makes it difficult to adjust the spring force of the closing operation spring.

  In order to adjust the spring force of the spring for the closing operation, it is conceivable to remove the main body of the spring operating device. However, when the main body of the spring operating device is removed, the bolt is removed for this purpose. It is necessary to perform operations such as jack-up, roller attachment, movement, spring force adjustment, movement, roller removal, and attachment to the breaker body, which increases the work load.

  Further, in Patent Document 1, it is necessary to fix the spring receiver, the spring force adjusting spacer and the spring receiver support body integrally with the fixing bolt, and to insert the spring force adjusting spacer, the spring receiver support. For example, it is necessary to create a gap between the body and the spring receiver, and the work load increases due to the adjustment of the spring force.

  The present invention has been made in view of the above points. The object of the present invention is not only that the entire device can be lowered, but also a simple operation that does not increase the work load without removing the spring actuator body. An object of the present invention is to provide a gas circuit breaker capable of adjusting the spring force of a closing operation spring and a method for adjusting the closing operation spring.

  In order to achieve the above object, a gas circuit breaker according to the present invention includes a stationary contact, a movable contact that contacts and separates from the stationary contact, the stationary contact and the movable contact inside. A sealed tank, a spring operating device that drives the movable contact, and a link mechanism that is disposed between and connects the sealed tank and the spring operating device. A spring, a closing operation spring, a blocking operation spring storing case storing the blocking operation spring, and a closing operation spring storing case storing the closing operation spring; and the sealing tank, the link mechanism, and the The spring operation device is arranged in a straight line, the blocking operation spring storage case is disposed above the closing operation spring storage case, and the closing operation spring storage case includes Working tool for adjusting the spring force of the working spring, characterized in that the working hole capable carry is formed.

  The method for adjusting the spring for closing operation of the gas circuit breaker according to the present invention includes a fixed contact, a movable contact that contacts and separates from the fixed contact, and the fixed contact. A sealed tank having a contact and the movable contact therein; a spring operating device for driving the movable contact; and a link mechanism disposed between the sealed tank and the spring operating device for connecting the two. The spring operating device includes a shut-off operation spring, a closing operation spring, a shut-off operation spring storage case for storing the shut-off operation spring, and a closing operation spring storage case for storing the closing operation spring. The sealing tank, the link mechanism, and the spring operating device are arranged in a straight line, the blocking operation spring storage case is disposed above the closing operation spring storage case, and the closing motion When adjusting the spring force of the closing operation spring by bringing the operating tool from the operating hole formed in the operating spring storage case, the operating tool is inserted into the closing operation spring storage case from the operating hole. The working tool is mounted on an adjustment nut that is screwed into a threaded portion formed through the center of the spring receiver at the end of the spring receiver support portion, and then the adjustment nut and the spring receiver The spring force of the closing operation spring is adjusted by displacing the spring receiver by tightening or loosening the screw portion of the support portion.

  According to the present invention, it is possible to adjust the spring force of the closing operation spring with a simple operation that does not increase the work load, without removing the spring operation device body, as well as being able to lower the entire apparatus. .

It is a side view which shows Example 1 of the gas circuit breaker of this invention. It is detail drawing of the spring operating device in Example 1 of the gas circuit breaker of this invention. It is sectional drawing which follows the III-III line of FIG. It is a figure equivalent to FIG. 2 which shows the time of the spring force adjustment of the spring for making operation | movement in Example 1 of the gas circuit breaker of this invention.

  Hereinafter, the adjustment method of the gas circuit breaker of the present invention and the spring for the closing operation thereof will be described based on the illustrated embodiment. In each figure, the same symbols are used for the same components.

  1 to 3 show a first embodiment of a gas circuit breaker according to the present invention.

  As shown in the figure, the gas circuit breaker 15 is roughly constituted by a sealed tank 2 in which a blocking part is accommodated, a spring operating unit 1, and a link mechanism unit 3 that connects the spring operating unit 1 and the sealed tank 2. 2, the link mechanism part 3, and the spring operating device 1 are arranged on a straight line.

The sealed tank 2 is connected to a common base by legs 16a and 16b, and an insulating gas such as SF ₆ gas is sealed inside the sealed tank 2 at a specified pressure.

  In the sealed tank 2, an electric current is supplied to a breaker contact composed of a movable contact 17 and a fixed contact 18 via a conductor (not shown). An insulating rod 19 is connected to the movable contact 17 on the opposite side in contact with the fixed contact 18, and the driving force of the spring operating device 1 acts on the insulating rod 19 via the link mechanism portion 3 to block the movable contact 17. Part contacts are opened and closed.

  Hereinafter, the details of the spring operating device 1 will be described with reference to FIG. The spring operating device 1 is roughly constituted by a housing 20, a cylindrical breaking operation spring storage case 7, and a closing operation spring storage case 6 installed at a lower portion of the breaking operation spring storage case 7. Yes. In addition, a control mechanism including a main lever 12, a closing cam 13 and the like is disposed in the housing 20, and a closing (opening) operation is performed by this control mechanism.

  The spring operating device 1 is supported by fixing one end of a shut-off operation spring storage case 7 and a closing operation spring storage case 6 to a back plate 14. A housing 20 is disposed on the opposite side of the back plate 14. Further, the closing operation spring storage case 6 has an opposite end connected to the back plate 14 fixed to the link mechanism 3 (see FIG. 1).

  A blocking operation spring 5 is stored in the blocking operation spring storage case 7, and a closing operation spring 4 is stored in the closing operation spring storage case 6.

  The blocking operation spring 5 and the closing operation spring 4 are arranged between the link mechanism portion 3 and the housing 20 so that the operation axis is lateral. As one example, the operating spring 5 and the closing operation spring 4 are arranged with their operating axes parallel to the operating direction of the operating axis of the movable contact 17.

  As the closing operation spring 4 is released, the closing cam 13 and the rotating shaft 23 rotate counterclockwise via the closing operation link 22. As the input cam 13 rotates counterclockwise, the outer peripheral surface of the input cam 13 presses the outer peripheral surface of the main lever 12 to rotate the main lever 12 clockwise. As a result, the blocking action spring 5 is compressed via the blocking action link 21 and the blocking action spring receiver 25.

  As shown in FIG. 3, the closing operation spring storage case 7 and the closing operation spring storage case 6 installed at the lower part of the blocking operation spring storage case 7 have their central axes in the horizontal direction (horizontal direction). It is arranged to shift to.

  Further, as shown in FIG. 2, a working hole 11 is formed above the side end portion of the link mechanism portion 3 on the closing operation spring storage case 6 side. The working hole 11 is preferably provided at a position that is not hidden by the shut-off operation spring storage case 7 when viewed from above the spring operating unit 1 and, as shown in FIG. And the upper part thereof needs to be sized and positioned so as to secure a space for working by bringing a working tool such as a ratchet wrench 24 for adjusting the spring force of the closing operation spring 4. . Note that the work hole 11 is normally blocked by a cover or the like to prevent intrusion of foreign matter (other than when adjusting the spring force of the closing operation spring 4 or other work).

  In the inside of the closing operation spring housing case 6 having the working hole 11, the closing operation spring 4 is arranged and fixed so that one end thereof is in contact with the back plate 14, and the other end of the closing operation spring 4 is arranged. Are arranged and fixed so as to abut against the spring receiver 8.

  As shown in FIG. 2, a spring receiving support 9 having a threaded portion 9 a formed through the center of the spring receiver 8 is disposed on the outer peripheral portion of the end opposite to the closing cam 13. Is connected to one end of a closing link 22 connected to the closing cam 13 and is screwed into the threaded portion 9a with the adjusting nut 10 through the center portion of the spring receiving 8 to thereby obtain a spring bearing. 8 and the spring support portion 9 are connected, and the spring force of the closing operation spring 4 is adjusted.

  Next, the operation of shifting from the cut (open) state of the breaker contact to the on (closed) state of the breaker contact will be described below.

  Normally, when a closing command is input to the gas circuit breaker 15, the control mechanism of the closing operation spring 4 is actuated to release the restriction of the closing operation spring 4 in the compressed state and release the closing operation spring 4. Let At this time, since one end of the closing operation spring case 6 is rigidly coupled to the link mechanism portion 3, even if the closing operation spring 4 and the spring receiver 8 are displaced in the vertical direction on the paper surface, the closing operation spring is provided. The vibration of the case 6 is suppressed.

  As the closing operation spring 4 is released, the closing cam 13 and the rotating shaft 23 rotate counterclockwise via the closing operation link 22. As the input cam 13 rotates counterclockwise, the outer peripheral surface of the input cam 13 presses the outer peripheral surface of the main lever 12 to rotate the main lever 12 clockwise. As a result, the blocking action spring 5 is compressed via the blocking action link 21 and the blocking action spring receiver 25. Thereby, it shifts from the cut (open) state of the breaker contact to the on (closed) state.

  Further, as shown in FIG. 2, the spring receiver 8 is formed with a recess 8a into which the spring receiver support portion 9 is fitted. By tightening or loosening the adjustment nut 10, the spring receiver support portion 9 is formed inside the recess 8a. And the spring receiver 8 is displaced (moved in the left-right direction in FIG. 2).

  As a result, adjustment of the spring force of the closing operation spring 4 for the purpose of making the closing times of the three-phase movable contact 17 and the stationary contact 18 the same time (the closing times of the respective phases coincide) is achieved. It becomes possible.

  Hereinafter, a method for adjusting the spring force of the closing spring 4 of the gas circuit breaker 15 according to this embodiment will be described with reference to FIG. The adjustment of the spring force of the closing operation spring 4 is performed at the time of assembly in the factory or installation at the site.

  Usually, a plurality of gas switchgears incorporating phase-separated three-phase gas circuit breakers are often arranged side by side. In this case, since all the phases of the phase separation type three-phase gas circuit breaker are sandwiched between the circuit breakers on both sides, it is difficult to adjust the device from the side.

  When adjusting the gas circuit breaker 15 for all phases, it is necessary to work with the gas circuit breaker 15 removed. However, the adjustment is performed once after installation as in the adjustment of the spring force of the closing operation spring 4. The workability is improved if it can be performed without removing the gas circuit breaker 15.

  Further, not only in a phase separation type three-phase gas circuit breaker, but also in a case where a sufficient working place cannot be secured around the circuit breaker, the spring force of the closing operation spring 4 can be adjusted without removing the spring actuator 1. Workability will improve if possible.

  As described above, the gas circuit breaker 15 in the present embodiment is arranged so that the center axes of the closing operation spring storage case 6 and the disconnection operation spring storage case 7 are shifted in the horizontal direction. It is possible to access the closing operation spring storage case 6 to adjust the spring force of the closing operation spring 4.

  That is, first, the cover of the work hole 11 provided in the loading operation spring storage case 6 is removed, a work tool such as a ratchet wrench 24 is inserted from the work hole 11, and the ratchet wrench 24 is connected to the adjusting nut 10. (See FIG. 4). Then, by rotating the ratchet wrench 24, the adjusting nut 10 screwed into the threaded portion of the spring support portion 9 is tightened or loosened, and the spring support 8 is displaced by moving in the left-right direction in FIG. Let That is, by tightening the adjustment nut 10, the closing operation spring 4 is stored to increase the reaction force, and by loosening the adjustment nut 10, the closing operation spring 4 is released to reduce the reaction force. can do.

  By adopting the present embodiment as described above, it is possible to lower the overall apparatus by arranging the sealed tank 2, the link mechanism section 3 and the spring operating device 1 in a straight line. The spring force of the closing operation spring 4 can be adjusted by a simple operation that does not increase the work load without removing the main body 1.

  In the above-described embodiment, the example in which the work hole 11 is formed above the side end portion of the link mechanism portion 3 on the side of the loading operation spring storage case 6 has been described. A work hole 11 may be formed below the side end of the link mechanism 3 of the spring storage case 6.

  The present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Spring operating device, 2 ... Sealing tank, 3 ... Link mechanism part, 4 ... Spring for closing operation, 5 ... Spring for interruption operation, 6 ... Spring storage case for closing operation, 7 ... Spring storage case for interruption operation, 8 DESCRIPTION OF SYMBOLS ... Spring receiver, 8a ... Concave part, 9 ... Spring support part, 9a ... Screw part, 10 ... Adjustment nut, 11 ... Working hole, 12 ... Main lever, 13 ... Loading cam, 14 ... Back plate, 15 ... Gas Circuit breaker, 16a, 16b ... Leg of sealed tank, 17 ... Movable contact, 18 ... Fixed contact, 19 ... Insulating rod, 20 ... Housing, 21 ... Link for breaking operation, 22 ... Link for closing operation, 23 DESCRIPTION OF SYMBOLS: Rotating shaft, 24 ... Ratchet wrench, 25 ... Spring receiving for interruption operation, 26 ... Conventional spring actuator, 27 ... Closing spring case, 28 ... Breaking spring case, 29 ... Working hole cover for adjusting the making spring force.

Claims (11)

A fixed contact, a movable contact that contacts and separates from the fixed contact, a sealed tank having the fixed contact and the movable contact inside, and a spring operating device that drives the movable contact; A link mechanism that is disposed between the sealed tank and the spring actuator and connects the two;
The spring operation device has a shut-off operation spring and a closing operation spring, a shut-off operation spring storage case for storing the shut-off operation spring, and a closing operation spring storage case for storing the closing operation spring.
The sealed tank, the link mechanism, and the spring operating device are arranged in a straight line, the blocking operation spring storage case is disposed above the closing operation spring storage case, and the closing operation is performed. A gas circuit breaker characterized in that a work hole into which a work tool for adjusting the spring force of the closing operation spring can be carried is formed in the spring storage case. The gas circuit breaker according to claim 1,
2. The gas circuit breaker according to claim 1, wherein the working hole is formed above or below a side end of the link mechanism on the side of the closing operation spring storage case. The gas circuit breaker according to claim 1 or 2,
The gas circuit breaker according to claim 1, wherein the working hole is provided at a position that is not hidden by the blocking operation spring storage case when viewed from above the spring operating unit. The gas circuit breaker according to any one of claims 1 to 3,
The gas circuit breaker characterized in that the working hole is closed by a cover except at least during the work of adjusting the spring force of the closing operation spring. The gas circuit breaker according to any one of claims 1 to 4,
The gas circuit breaker according to claim 1, wherein a central axis of each of the shut-off operation spring storage case and the closing operation spring case is shifted in a horizontal direction. The gas circuit breaker according to any one of claims 1 to 5,
The link mechanism transmits a driving force of the cutoff operation spring to the movable contact, and the spring operator holds and releases the cutoff operation spring and the closing operation spring. And the other end is connected to the link mechanism,
The gas circuit breaker characterized in that an operating axis of the interrupting spring is arranged between the link mechanism and the control mechanism in parallel with the operating direction of the operating axis of the movable contact. The gas circuit breaker according to any one of claims 1 to 6,
A spring receiver that abuts one end of the closing operation spring inside the closing operation spring storage case in which the working hole is formed, and a side of the spring receiver that contacts the closing operation spring A spring receiving support portion that is loosely fitted to the screw receiving portion, a screw portion formed through an end of the spring receiving support portion through the center of the spring receiving portion, and an adjustment nut screwed into the screw portion,
The spring force of the closing operation spring is adjusted by screwing the threaded portion with the adjusting nut on the side of the spring receiver opposite to the side on which the closing operation spring abuts. Gas circuit breaker. The gas circuit breaker according to claim 7,
A gas circuit breaker according to claim 1, wherein the spring receiver is formed with a recess into which the spring receiver support portion is fitted, and the spring receiver is displaced by tightening or loosening the adjusting nut. A fixed contact, a movable contact that contacts and separates from the fixed contact, a sealed tank having the fixed contact and the movable contact inside, and a spring operating device that drives the movable contact; A link mechanism that is disposed between the sealed tank and the spring actuator and connects the two;
The spring operation device has a shut-off operation spring and a closing operation spring, a shut-off operation spring storage case for storing the shut-off operation spring, and a closing operation spring storage case for storing the closing operation spring.
The sealed tank, the link mechanism, and the spring operating device are arranged in a straight line, the blocking operation spring storage case is disposed above the closing operation spring storage case, and the closing operation is performed. When adjusting the spring force of the closing operation spring by bringing a work tool from the work hole formed in the spring storage case,
An adjustment nut that is inserted into the loading operation spring storage case from the work hole and is screwed into a screw portion formed through the center of the spring receiver at the end of the spring support portion. The spring force of the closing operation spring is adjusted by displacing the spring receiver by tightening or loosening the adjustment nut and the screw portion of the spring receiver support part after mounting the working tool. A method of adjusting a spring for closing operation of a gas circuit breaker characterized by the above. In the adjustment method of the spring for making operation of the gas circuit breaker according to claim 9,
The spring receiver is formed with a recess into which the spring receiver support portion is fitted. By tightening or loosening the adjusting nut, the spring receiver support portion moves in the recess, and the spring receiver is displaced. A method for adjusting a spring for closing operation of a gas circuit breaker, characterized in that: In the adjustment method of the spring for making operation of the gas circuit breaker according to claim 9 or 10,
By tightening the adjusting nut, the closing operation spring is accumulated to increase the reaction force, and by loosening the adjusting nut, the closing operation spring is released to reduce the reaction force. A method of adjusting a spring for closing operation of a gas circuit breaker characterized by the above.

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