JP6953935B2 - Pressure release device, switchboard - Google Patents

Description

The present invention relates to a pressure release device and the like.

For example, in a power device that accommodates a power transmission / distribution system such as a switchboard in a housing, when an abnormality in the power transmission / distribution system occurs, for example, when the internal pressure of the accommodation space rises due to an arc failure or the like, the internal gas is released to the outside of the accommodation space. A pressure device may be provided (for example, Patent Document 1 and the like).

In Patent Document 1, a pressure release plate is provided to close the pressure release port on the ceiling of the accommodation space, the pressure release plate is rotatably supported by a rotatable hinge, and the pressure release plate serves as a fulcrum for the hinge due to the internal high pressure gas. A pressure release device is disclosed in which the pressure release port is opened by rotating the pressure release device.

Japanese Unexamined Patent Publication No. 2010-183818

However, Patent Document 1 has a configuration in which the high-pressure gas is discharged to the outside of the housing as it is. Therefore, there is a possibility that the gas that has risen to a relatively high temperature due to the arc failure is discharged to the surroundings of the electric power device as it is.

Therefore, in view of the above problems, it is an object of the present invention to provide a pressure release device or the like capable of further lowering the temperature of the high-pressure gas discharged to the outside of the housing when an abnormality of the power transmission / distribution system such as an arc failure occurs.

In order to achieve the above object, in one embodiment of the present invention,
A housing that houses the power transmission and distribution system,
An opening provided in the housing and
A lid is closed by closing the opening, and a lid is opened by the action of a high-pressure gas that may be generated due to an abnormality in the power transmission / distribution system.
When the lid is opened by the action of the high-pressure gas, the lid-opening operation of the lid is performed so that the state in which the high-pressure gas released from the opening collides with the lid is maintained. Regulatory department to regulate and
When the lid is a lid opened by the action of the high pressure gas, to said mouth opening, Bei example a guide unit for moving the lid in a substantially vertical direction, and
The guide portion includes an insertion hole provided around the opening of the housing.
The lid portion includes a lid plate that covers the opening, a leg portion that extends substantially vertically from the lid plate and is inserted into the insertion hole, and a collision surface that separates the lid plate from the lid plate to the inside of the housing. When the lid portion surrounds the collision surface and extends from the collision surface toward the inside of the housing and the lid is opened by the action of the high-pressure gas, it passes through the opening. A first flow through which the high-pressure gas can flow from the inside to the outside of the housing in a cross section where the possible first wall portion and the collision surface inside the first wall portion exist. A second passage portion through which the high-pressure gas can flow is included between the portion and the first wall portion and the lid plate.
The restricting portion includes a retaining portion provided on the leg portion to prevent the leg portion from coming out of the insertion hole.
A pressure release device is provided.
Further, in other embodiments of the present invention,
A housing that houses the power transmission and distribution system,
An opening provided in the housing and
A lid is closed by closing the opening, and a lid is opened by the action of a high-pressure gas that may be generated due to an abnormality in the power transmission / distribution system.
When the lid is opened by the action of the high-pressure gas, the lid-opening operation of the lid is performed so that the state in which the high-pressure gas released from the opening collides with the lid is maintained. Regulatory department to regulate and
When the lid portion is opened by the action of the high-pressure gas, the lid portion is provided with a guide portion for moving the lid portion in a substantially vertical direction with respect to the opening port.
The lid portion surrounds and surrounds a lid plate that covers the opening, an insertion hole provided in the lid plate, a collision surface that is separated from the lid plate inside the housing, and a collision surface. A first wall portion that extends from the collision surface toward the inside of the housing and can pass through the opening when the lid portion is opened by the action of the high-pressure gas, and the first wall portion. A first passage portion through which the high-pressure gas can flow from the inside to the outside of the housing, the first wall portion, and the above in a cross section in which the collision surface exists inside the wall portion 1. A second passage portion through which the high-pressure gas can flow is included between the lid plate and the lid plate.
The guide portion includes an erection portion that is erected in a direction substantially perpendicular to the opening in a manner of inserting into the insertion hole around the opening on the outside of the housing.
The restricting portion includes a retaining portion provided on the standing portion and preventing the lid portion from coming off from the standing portion.
A pressure release device is provided.

Further , in still another embodiment of the present invention,
Equipped with the above-mentioned pressure release device,
A switchboard is provided.

According to the above-described embodiment, it is possible to provide a pressure release device or the like capable of further lowering the temperature of the high-pressure gas discharged to the outside of the housing when an abnormality of the power transmission / distribution system such as an arc failure occurs.

It is a figure which shows typically an example of the structure of a switchboard. It is a perspective view which shows the structure of an example of the pressure release device which concerns on 1st Embodiment. It is a perspective view which shows the structure of an example of the pressure release device which concerns on 1st Embodiment. It is a perspective sectional view which shows the structure of an example of the pressure release device which concerns on 1st Embodiment. It is a perspective view which shows the structure of an example of the pressure release device which concerns on 1st Embodiment. It is a side view sectional view which shows the operation of an example of the pressure release device which concerns on 1st Embodiment. It is a perspective sectional view which shows the structure of an example of the pressure release device which concerns on 2nd Embodiment. It is a perspective sectional view which shows the structure of an example of the pressure release device which concerns on 3rd Embodiment. It is a side view sectional view which shows the structure and operation of an example of the pressure release device which concerns on 3rd Embodiment. It is a perspective sectional view which shows the structure of an example of the pressure release device which concerns on 4th Embodiment. It is a perspective sectional view which shows the structure and operation of an example of the pressure release device which concerns on 4th Embodiment. It is a perspective sectional view which shows the structure of an example of the pressure release device which concerns on 5th Embodiment. It is a side view sectional view which shows the structure and operation of an example of the pressure release device which concerns on 5th Embodiment. It is a perspective sectional view which shows the structure of an example of the pressure release device which concerns on 6th Embodiment. It is a side view sectional view which shows the structure and operation of an example of the pressure release device which concerns on 6th Embodiment.

Hereinafter, modes for carrying out the invention will be described with reference to the drawings.

[Distribution board configuration]
First, the configuration of the switchboard 1 according to the present embodiment will be described with reference to FIG.

FIG. 1 is a side view schematically showing an example of the configuration of the switchboard 1.

In FIG. 1, the side surface portion of the housing 10 is omitted so that the inside of the housing 10 can be visually recognized.

The switchboard 1 is an example of a power device including a power transmission / distribution system in a housing. Specifically, the switchboard 1 is a switchgear including a switchgear (circuit breaker 30 described later) that distributes the received electric power to a predetermined electric load and safely opens and closes the electric power path. The switchboard 1 includes a housing 10, a bus 20 as a power transmission / distribution system, a circuit breaker 30, a trunk line 40, and disconnecting portions 50 and 60.

The housing 10 is made of metal having relatively high rigidity, for example, and has a substantially rectangular parallelepiped shape. The housing 10 includes partition plates 10a, 10b, and 10c that partition the internal space into a plurality of rooms (bus room 11, circuit breaker room 12, cable room 13, buffer tank 14).

The partition plate 10a extends in the front-rear direction and the left-right direction at a position above the center in the vertical direction inside the housing 10, and partitions the inside of the housing 10 vertically. As a result, the space inside the housing 10 is partitioned into the upper buffer tank 14 and the lower space.

The partition plate 10b extends in the vertical direction and the horizontal direction at a position in front of the center in the front-rear direction inside the housing 10, and the space under the housing 10 partitioned by the partition plate 10a is moved back and forth. Partition. As a result, of the space inside the housing 10, the lower space partitioned by the partition plate 10a is divided into a circuit breaker chamber 12 on the front side (an example of a storage chamber) and a space on the rear side.

The partition plate 10c has an L-shape when viewed from the side (along the left-right direction), and in the space below and behind the inside of the housing 10 partitioned by the partition plates 10a and 10b. Both ends thereof are connected to the partition plates 10a and 10b. As a result, the lower and rear spaces inside the housing 10 partitioned by the partition plates 10a and 10b are further two spaces, that is, the upper rectangular parallelepiped-shaped bus chamber 11 (an example of the accommodation chamber) and the side view. It is partitioned into a cable chamber 13 (an example of a storage chamber) having an L-shaped space.

That is, the housing 10 includes the bus chamber 11, the circuit breaker chamber 12, and the cable chamber 13 partitioned by the partition plates 10a to 10c, and the power transmission / distribution system (bus 20, circuit breaker 30, trunk line 40, etc.) ) Is housed.

Hereinafter, the bus chamber 11, the circuit breaker chamber 12, and the cable chamber 13 may be comprehensively referred to as a “containment chamber”.

Further, the housing 10 has an exhaust port 15 provided on the upper surface thereof and an exhaust port cover 16 that covers the exhaust port 15 from above.

The exhaust port 15 is an opening for discharging the high-pressure gas discharged from the bus chamber 11, the circuit breaker chamber 12, or the cable chamber 13 to the buffer tank 14 to the outside of the housing 10 by the pressure release device 100 described later.

The exhaust port cover 16 covers the exhaust port 15 from above while securing an exhaust path so that foreign matter (for example, rain, small animals, etc.) does not enter the buffer tank 14 from the exhaust port 15.

The bus 20 is a three-phase main circuit conductor housed in the bus chamber 11 and energizes the electric power supplied from the power supply side. The bus 20 is attached to the side surface of the L-shaped partition plate 10c extending in the vertical direction by the insulator 21. The bus 20 is electrically connected to the disconnector 50, and is electrically connected to one end (main circuit portion) of the circuit breaker 30 via the disconnector 50.

The circuit breaker 30 is housed in the circuit breaker chamber 12 and opens and closes a power path (main circuit) from the power supply side to the load side. The circuit breaker 30 is, for example, a vacuum circuit breaker (VCB: Vacuum Circuit Breaker), a high-pressure vacuum electromagnetic contactor (VMC: Vacuum Magnetic Contactor), a gas circuit breaker (GCB: Gas Circuit Breaker), or the like. The main circuit at one end of the circuit breaker 30 is electrically connected to the disconnector 50, and the main circuit at the other end is electrically connected to the disconnector 60. The circuit breaker 30 is mounted on a known truck-type drawer mechanism 31, and is carried out from the front door of the circuit breaker chamber 12 (not shown) to the outside of the housing 10 or from the outside via the drawer mechanism 31. It has a configuration in which the body 10 can be carried into the circuit breaker chamber 12.

The trunk line 40 is a main circuit conductor housed in the cable chamber 13 and energizes the electric power supplied to the load of the distribution destination. The trunk line 40 is attached to the lower surface of the L-shaped partition plate 10c by the insulator 41. Further, an instrument transformer (CT: Current Transformer) 42 is arranged on the trunk line 40. The trunk line 40 is electrically connected to the disconnector 60, and is electrically connected to the other end (main circuit portion) of the circuit breaker 30 via the disconnector 60.

The disconnecting portion 50 is fixed through the partition plate 10b between the bus chamber 11 and the circuit breaker chamber 12.

The disconnecting portion 60 is fixed through the partition plate 10b between the cable chamber 13 and the circuit breaker chamber 12.

Further, the switchboard 1 includes a pressure release device 100 that releases high-pressure gas to the outside when the internal pressure rises due to an abnormality such as an arc failure that may occur in the bus chamber 11, the circuit breaker chamber 12, or the cable chamber 13. ..

The pressure release device 100 closes the pressure release ports 110 provided on the partition plate 10a and the respective pressure release ports 110 in a manner corresponding to each of the bus chamber 11, the circuit breaker chamber 12, and the cable chamber 13. Includes three lids 120.

The pressure release port 110 is an opening that discharges the internal high-pressure gas to the buffer tank 14 when an arc failure or the like occurs in the bus chamber 11, the circuit breaker chamber 12, or the cable chamber 13 and the internal pressure rises. .. The area of the pressure release port 110 is, for example, simulated so that the pressure inside each of the bus chamber 11, the circuit breaker chamber 12, and the cable chamber 13 is suppressed to a pressure increase that does not lead to damage to the housing 10. Can be set as appropriate. Further, the area of the pressure discharge port 110 corresponding to each of the bus chamber 11, the circuit breaker chamber 12, and the cable chamber 13 is suppressed within a range in which the pressure increase in the event of an arc failure or the like does not lead to damage to the housing 10. They may be the same or different from each other, as long as they are premised.

Normally, the lid 120 closes the pressure release port 110, and when the internal pressure of the bus chamber 11, the circuit breaker chamber 12, or the cable chamber 13 rises above a predetermined reference due to an arc failure or the like, the action of the internal pressure acts. Open the lid with. Details will be described later.

[Details of pressure release device]
Next, specific embodiments (first to sixth embodiments) of the pressure release device 100 will be described with reference to FIGS. 2 to 12.

<First Embodiment>
FIG. 2 (FIGS. 2A to 2D) is a diagram showing a structure of an example of the pressure release device 100 according to the first embodiment. Specifically, FIG. 2A is a perspective view of the pressure release device 100 as viewed from diagonally above the right front. FIG. 2B is a perspective view of the periphery of the pressure release port 110 from which the lid portion 120 of the pressure release device 100 has been removed, as viewed from diagonally above the right front. FIG. 2C is a perspective cross-sectional view of the pressure release device 100 with the lid portion 120 opened, as viewed from diagonally above the front left. FIG. 2D is a perspective view showing the structure of the lid portion 120.

In FIGS. 2A to 2C, the portion of the housing 10 corresponding to the buffer tank 14 is omitted. The same applies to FIGS. 4, 5, 7, 9, and 11 described below. Further, in FIG. 2A, the lid 120 corresponding to the pressure release port 110 of the bus chamber 11 represents a state in which the lid is opened, and the lid 120 corresponding to the pressure discharge port 110 of the circuit breaker chamber 12 and the cable chamber 13 is , Represents the state in which the lid is closed. The same applies to FIGS. 4, 5, 7, 9, and 11 described below.

As shown in FIGS. 2A, 2C, and 2D, the lid portion 120 extends from both ends of the flat plate-shaped lid plate 121 in the left-right direction in the direction perpendicular to the lid plate 121 (downward). A flat plate-shaped leg plate 122 and a stopper 123 attached to an end portion (lower end) of the leg plate 122 are included.

The lid plate 121 has a substantially rectangular flat plate shape composed of two sides along the front-rear direction and two sides along the left-right direction, and similarly, is composed of two sides along the front-rear direction and two sides along the left-right direction. The pressure release port 110 is covered from above. That is, the lid plate 121 is arranged so as to cover the pressure release port 110 in a plan view. The lid plate 121 may be made of, for example, a steel plate, a resin reinforced with carbon fiber, or the like. Hereinafter, the same applies to the configurations included in the leg plate 122 and the stopper 123 and the lid portions 120 of the second to sixth embodiments described later.

Further, the lid plate 121 may be attached to the partition plate 10a with a relatively weak strength by a sealing material, a claw portion (both not shown) hooked on the end portion of the pressure release port 110, or the like. As a result, while suppressing the situation where foreign matter is mixed into the pressure discharge port 110 from between the lid plate 121 and the partition plate 10a, when the pressure inside the accommodation chamber rises, the sealing material or the like is easily damaged. By moving the lid 120, the pressure release port 110 can be opened.

The leg plate 122 (an example of the leg portion) is inserted into the slit hole 130 provided in the partition plate 10a. As shown in FIG. 2B, the slit hole 130 (an example of the insertion hole) is located outside the two sides of the pressure discharge port 110 in the front-rear direction (specifically, the outside in the right direction and the outside in the left direction). Two are provided along the sides. The distance between the two slit holes 130 in the left-right direction is the same as the distance between the two leg plates 122 in the left-right direction, and both ends thereof are outside of both ends of the two sides in the front-rear direction of the pressure release port 110 ( It protrudes to the front side and the rear side). As a result, it is possible to realize a state in which the two leg plates 122 are inserted into the two slit holes 130 and the lid plate 121 covers the pressure release port 110. Further, when the internal pressure rises due to an arc failure in the accommodation chamber or the like, the lid portion 120 (cover plate 121) is guided to the slit hole 130 in a substantially vertical direction with respect to the pressure release port 110. Can be moved to.

The lid plate 121 and the two leg plates 122 may be manufactured separately and connected by welding, welding, or the like. Further, the lid plate 121 and the two leg plates 122 may be integrally formed by performing press molding, bending molding, or the like on one flat plate (metal plate). Further, the lid plate 121 and the two leg plates 122 may be integrally formed by molding or the like.

The stopper 123 (an example of the regulating portion and the retaining portion) is attached to the lower end portion of the leg plate 122. The stopper 123 is a plate-shaped member having a substantially L-shaped cross section, and one surface of the substantially L-shaped cross section is attached to an outer side surface at a lower end portion of the leg plate 122 by a bolt 123a and a nut 123b. Further, the stopper 123 is arranged so that the other surface of the substantially L-shaped cross section extends outward from the side surface of the leg plate 122 in a substantially vertical direction. As a result, when the internal pressure rises due to an arc failure in the accommodation chamber or the like, the other surface of the substantially L-shaped cross section is caught on the lower surface of the partition plate 10a of the housing 10, so that the leg plate 122 comes out upward from the slit hole 130. Can be avoided. As a result, the lid plate 121 is maintained at a constant height (maximum open height) with respect to the pressure discharge port 110, so that the high-pressure gas released (spouted) from the pressure discharge port 110 is discharged from the lid plate 121. The state of colliding with the lower surface can be maintained.

The maximum opening height can be defined in relation to the area of the pressure discharge port 110 (flow path cross-sectional area). For example, in a state where the lid portion 120 is maintained at the maximum open height, the sum of the flow path cross-sectional areas of the front and rear gaps between the lid portion 120 and the partition plate 10a is the area of the pressure discharge port 110 (flow path). The maximum opening height should be set within the range of cross-sectional area) or more. Specifically, the sum of the flow path cross-sectional areas of the front and rear gaps between the lid portion 120 and the partition plate 10a, which is represented by the product of the maximum opening height and the length of the lid plate 121 in the left-right direction, is the release pressure. The maximum opening height may be specified so as to be equal to or larger than the area of the mouth 110. As a result, it is possible to avoid a situation in which the front and rear gaps between the lid 120 and the partition plate 10a become bottlenecks and the high-pressure gas in the storage chamber is less likely to be released into the buffer tank 14.

FIG. 3 is a side view cross-sectional view showing the operation of the pressure release device 100 according to the present embodiment, and specifically, is a cross-sectional view of the pressure release device 100 in a vertical plane in the left-right direction.

As shown in FIG. 3, in the present embodiment, when an arc failure or the like occurs inside the accommodation chamber, the lid portion 120 rises in the direction perpendicular to the pressure release port 110 in response to the rise in the internal pressure. Then, in a state where the pressure of the high-pressure gas discharged from the pressure discharge port 110 is relatively high, as described above, the lid plate 121 has a constant height (maximum opening) with respect to the pressure discharge port 110 due to the action of the stopper 123. Height) is maintained.

As a result, the high-pressure gas (solid arrow in the figure) is discharged from the pressure discharge port 110 in a jet state and collides with the lower surface of the lid plate 121 (the portion surrounded by the dotted line in the figure), and then the lid portion 120 and the partition plate. It is discharged into the buffer tank 14 from the front and rear gaps between the 10a and the 10a. Therefore, due to the action of the collision jet, specifically, the action of convection heat transfer promoted during the collision jet, heat from a very high temperature high pressure gas to a relatively low temperature lid 120 (lid plate 121, etc.) The movement is promoted and the high pressure gas released into the buffer tank 14 can be cooled. As a result, the temperature of the gas discharged from the exhaust port 15 to the outside of the housing 10 via the buffer tank 14 can be lowered.

Further, in the present embodiment, the slit hole 130 through which the leg plate 122 is inserted is perpendicular to the pressure release port 110 when the lid 120 is opened by the action of high-pressure gas in the accommodating portion due to an arc failure or the like. The lid 120 is moved in the direction.

As a result, the pressure release device 100 can make the lid portion 120 (cover plate 121) face the high pressure gas discharged from the pressure release port 110, so that the high pressure gas can surely collide with the lid portion 120. Can be done.

Further, in the present embodiment, since the lid portion 120 can also be used as a member for generating a collision jet, the structure of the switchboard 1 may become complicated as in the case where a member for a collision jet (collision jet plate) is separately provided. It is possible to suppress the situation where the cost rises.

Further, when the configuration in which the lid is opened by the rotary hinge is adopted as in the above-mentioned prior art document (Patent Document 1), it is necessary to arrange the collision jet plate further outside (upper side) than the rotation locus of the lid. There is a possibility that the distance from the opening to the collision jet plate will be relatively large. As a result, the velocity of the jet that collides with the collision jet plate may decrease, and the heat transfer from the high-pressure gas to the collision jet plate may be suppressed. On the other hand, in the present embodiment, the lid portion 120 (cover plate 121) acts as a member for generating a collision jet. Therefore, as described above, the lid plate 121 that acts as a collision jet plate within a range in which the front and rear gaps between the lid portion 120 and the partition plate 10a do not become a bottleneck when high-pressure gas is discharged. The distance (maximum opening height) from the pressure release port 110 can be made relatively close. Therefore, the cooling performance of the high-pressure gas discharged from the pressure discharge port 110 due to the collision jet can be improved.

Further, when the collision jet plate is separately provided on the premise that the buffer tank is provided, the size (height) of the buffer tank is regulated by the arrangement of the collision jet plate, so that the buffer tank becomes large, and as a result, the switchboard 1 It may lead to an increase in size. On the other hand, in the present embodiment, as described above, the collision jet flow is such that the front and rear gaps between the lid 120 and the partition plate 10a do not become a bottleneck when the high-pressure gas is released. The distance (maximum opening height) between the lid plate 121 acting as a plate and the pressure release port 110 can be made relatively close. Therefore, the height of the buffer tank 14 can be suppressed, and as a result, the size of the switchboard 1 can be suppressed.

<Second Embodiment>
FIG. 4 is a perspective view showing the structure of an example of the pressure release device 100 according to the second embodiment, and specifically, is a perspective view of the pressure release device 100 viewed from diagonally above right front. Hereinafter, the description will be focused on the parts different from those of the first embodiment.

As shown in FIG. 4, the lid portion 120 includes a flat plate-shaped lid plate 121 and an insertion hole 124 provided in the lid plate 121.

Similar to the first embodiment, the lid plate 121 has a substantially rectangular shape composed of two sides along the front-rear direction and two sides along the left-right direction of the switchboard 1, and covers the pressure discharge port 110 from above.

The insertion hole 124 is a round hole provided at each of the four corners of the substantially rectangular lid plate 121. A rod-shaped stud 140 (an example of a guide portion and an upright portion) erected outside the four corners of the rectangular pressure discharge port 110 in the partition plate 10a is inserted into each of the four insertion holes 124. As a result, it is possible to realize a state in which the lid plate 121 covers the pressure release port 110. Further, when the internal pressure rises due to an arc failure in the accommodation chamber or the like, the lid portion 120 (cover plate 121) is released from the pressure release port in such a manner that the lid plate 121 is guided by the stud 140 inserted through the insertion hole 124. It can be moved substantially perpendicular to 110.

At the tip of the stud 140, an enlarged diameter portion 141 (an example of a regulating portion and a retaining portion) larger than the inner diameter of the insertion hole 124 (the outer diameter of the main portion of the stud 140) is provided. As a result, when the internal pressure rises due to an arc failure in the accommodation chamber or the like, the upper surface of the lid plate 121 is caught by the enlarged diameter portion 141, so that the lid plate 121 cannot be pulled out from the stud 140 upward.

As described above, in the present embodiment, as in the first embodiment, the lid plate 121 is maintained at a constant height (maximum open height) with respect to the pressure release port 110 by the action of the stud 140. It is possible to maintain a state in which the high-pressure gas released (spouted) from the pressure release port 110 collides with the lower surface of the lid plate 121. Therefore, as in the case of the first embodiment, a collision jet is generated between the high-pressure gas discharged from the pressure discharge port 110 and the lid plate 121, and the gas discharged from the pressure discharge port 110 to the buffer tank 14. The temperature of the can be lowered.

Further, in the present embodiment, the stud 140 inserted into the insertion hole 124 of the lid plate 121 is connected to the pressure release port 110 when the lid portion 120 is opened by the action of high-pressure gas in the accommodating portion due to an arc failure or the like. On the other hand, the lid 120 is moved in the vertical direction.

As a result, the pressure release device 100 can make the lid portion 120 (cover plate 121) face the high pressure gas discharged from the pressure release port 110 as in the first embodiment, so that the lid portion 120 has a high pressure. The gas can be reliably collided.

Further, in the present embodiment, the high-pressure gas after colliding with the lid plate 121 not only passes through the front and rear gaps between the lid portion 120 (cover plate 121) and the partition plate 10a, but also passes through the left and right gaps. Then, it can be discharged into the buffer tank 14. As a result, the maximum opening height can be further lowered as compared with the case of the first embodiment, so that the distance between the lid plate 121 acting as the collision jet plate and the pressure release port 110 (maximum opening height). Can be brought closer. Therefore, the cooling performance of the high-pressure gas discharged from the pressure discharge port 110 due to the collision jet can be further improved.

Further, in the present embodiment, since there is no component of the pressure release device 100 arranged inside the accommodation chamber, it is suitable from the viewpoint of the insulation property of the switchboard 1.

<Third Embodiment>
FIG. 5 is a perspective cross-sectional view showing the structure of an example of the pressure release device 100 according to the third embodiment. Specifically, a cross section perpendicular to the left-right direction of the pressure release device 100 is viewed from diagonally above right front. It is a perspective sectional view. FIG. 6 is a side view cross-sectional view showing the structure and operation of an example of the pressure release device 100 according to the third embodiment, and specifically, is a cross-sectional view of the pressure release device 100 in a vertical plane in the left-right direction. Hereinafter, the parts different from the first embodiment and the second embodiment will be mainly described.

As shown in FIGS. 5 and 6, the lid portion 120 includes a lid plate 121, a leg plate 122 inserted into the slit hole 130 of the partition plate 10a, and a stopper 123 (not shown), as in the first embodiment. include. Further, the lid portion 120 further includes a wall portion 125 provided below the lid plate 121, flat plate-shaped collision plates 126 and 127, and a flat plate-shaped guide plate 128.

Since the lid plate 121, the leg plate 122, the stopper 123, and the slit hole 130 are the same as those in the first embodiment, the description thereof will be omitted.

The wall portion 125 (an example of the first wall portion) consists of two flat plate-shaped wall plates 1251 arranged perpendicular to the front-rear direction and two flat plate-shaped plates arranged perpendicularly to the left-right direction. It has a box shape (rectangular tubular shape) in which the upper end and the lower end are open, including the wall plate 1252 of the above. As a result, the wall portion 125 can surround the collision plates 126 and 127, which will be described later, inside.

The upper ends of the two wall plates 1251 are separated from the lower surface of the lid plate 121 by a predetermined distance. Further, each of the two wall plates 1251 is arranged so that the position in the front-rear direction is inside the position in the front-rear direction of the outer edge of the pressure release port 110. As a result, the wall plates 1251 arranged to face each other release pressure without contacting the partition plate 10a when the lid 120 is opened in response to an increase in internal pressure due to an arc failure or the like in the accommodation chamber. It can pass through the mouth 110.

Each of the two wall plates 1252 extends downward from the lower surface of the lid plate 121. Further, the two wall plates 1252 are arranged so that the positions in the left-right direction are inside the positions in the left-right direction of the outer edge of the pressure release port 110, respectively. As a result, the wall plate 1252 passes through the pressure release port 110 without contacting the partition plate 10a when the lid 120 is opened in response to an increase in internal pressure due to an arc failure or the like in the accommodation chamber. be able to.

Further, in the wall portion 125, since the upper end of the wall plate 1251 is separated from the lower surface of the lid plate 121 as described above, there is a gap between the lower surface of the lid plate 121 and the upper end of the wall plate 1251. A flow portion 125a (an example of a second flow portion) is provided so that the high-pressure gas that collides with the lower surface of the lid plate 121 can flow toward the buffer tank 14.

Two collision plates 126 (an example of a collision surface) are provided. The two collision plates 126 extend in the front-rear direction so as to face each other from the upper ends of the two wall plates 1251 toward the inside of the wall portion 125. That is, the two collision plates 126 are respectively arranged downward from the lower surface of the lid plate 121 and substantially parallel to the lid plate 121. Further, the two collision plates 126 extend in the left-right direction and are connected to each of the two wall plates 1252 arranged to face each other in the left-right direction. That is, the collision plate 126 is fixed to the inside of the wall portion 125 in such a manner that the wall portion 125 surrounds the periphery (front-rear direction and left-right direction). Between the two collision plates 126 arranged to face each other, a passage portion 126a (an example of the first passage portion) through which the gas inside the accommodating chamber can pass toward the lid plate 121 is provided.

The collision plate 127 (an example of a collision surface) is further separated from the lower surface of the lid plate 121 than the collision plate 126, and is arranged substantially parallel to the lid plate 121 (collision plate 126). Further, the collision plate 127 extends in the left-right direction and is connected to each of the two wall plates 1252 arranged to face each other in the left-right direction, like the collision plate 126. That is, the collision plate 127 is fixed to the inside of the wall portion 125 in such a manner that the wall portion 125 surrounds the periphery (front-rear direction and left-right direction). Further, the collision plates 127 are arranged substantially symmetrically with respect to the center of the wall portion 125 in the front-rear direction, and the dimensions in the front-rear direction thereof are set to be substantially the same as the dimensions in the front-rear direction of the flow passage portion 126a. As a result, a cross section in which the collision plate 127 exists between the wall plate 1251 and the end portion in the front-rear direction of the collision plate 127, and a passage portion through which the gas inside the accommodation chamber can pass toward the lid plate 121. 127a (an example of the first flow section) is set.

Two guide plates 128 are provided. The two guide plates 128 extend in the front-rear direction so as to face each other from the lower ends of the two wall plates 1251 toward the inside of the wall portion 125. Further, the two guide plates 128 extend in the left-right direction and are connected to each of the two wall plates 1252 arranged to face each other in the left-right direction, like the collision plate 126 and the like. That is, the guide plate 128 is fixed to the inside of the wall portion 125 in such a manner that the wall portion 125 surrounds the surroundings (front-rear direction and left-right direction). Between the two guide plates 128 arranged to face each other, a flow portion 128a through which the gas inside the accommodating chamber can pass toward the lid plate 121 is provided, and the dimension in the front-rear direction thereof is the collision plate 127. It is set to be almost the same as the dimensions in the front-back direction. As a result, the guide plate 128 can guide the internal gas so as to collide with the collision plate 127 through the flow passage portion 128a when the internal pressure rises due to an arc failure or the like in the accommodation chamber.

As shown in FIG. 6, when an arc failure or the like occurs inside the accommodation chamber, the lid portion 120 rises in the direction perpendicular to the pressure release port 110 in response to the rise in the internal pressure. Then, in a state where the pressure of the high-pressure gas discharged from the pressure discharge port 110 is relatively high, as described above, the lid plate 121 has a constant height (maximum opening) with respect to the pressure discharge port 110 due to the action of the stopper 123. Height) is maintained.

In this case, the high-pressure gas (solid arrow in the figure) passes through the flow passage portion 128a and collides with the collision plate 127 arranged above the flow passage portion 128a in a manner guided by the guide plate 128 (dotted line box in the figure). part).

The gas that collides with the collision plate 127 then changes the direction toward the flow passage portion 127a, that is, the direction in which it flows outside the wall portion 125, and then collides with the wall plate 1251 (the portion surrounded by the dotted line in the figure). ).

The gas that has collided with the wall plate 1251 then changes its upward flow direction, passes through the flow portion 127a, and collides with the collision plate 126 arranged above the passage portion 127a (the portion surrounded by the dotted line in the figure).

The gas that collides with the collision plate 126 then changes the direction toward the flow portion 126a, that is, the direction in which it flows inside the wall portion 125, passes through the passage portion 126a, and reaches the lid plate 121 arranged above the passage portion 126a. Collision (the part surrounded by the dotted line in the figure).

The gas that collides with the lid plate 121 then changes the direction toward the flow portion 125a, that is, the direction in which the gas flows toward the end side of the lid plate 121, passes through the passage portion 125a, and then is discharged to the buffer tank 14. ..

As described above, in the present embodiment, the pressure release device 100 includes the collision plates 126 and 127 that are separated from the lid plate 121 toward the inside of the accommodation chamber. Further, the pressure release device 100 surrounds the collision plates 126 and 127 and extends from the collision plates 126 and 127 toward the inside of the accommodation chamber, and the lid 120 is opened by the action of the high pressure gas. In some cases, it includes a wall portion 125 configured to be passable through the pressure release port 110. The pressure release device 100 has a cross section in which the collision plates 126 and 127 are present inside the wall portion 125, and the flow portions 126a and 127a through which the high-pressure gas can flow from the inside to the outside of the accommodating chamber and the wall. A flow portion 125a through which high-pressure gas can flow is included between the portion 125 (wall plate 1251) and the lid plate 121.

As a result, the high-pressure gas can be made to collide with the collision plates 126 and 127 surrounded by the wall portion 125, and then the high-pressure gas can be further collided with the lid plate 121 through the flow passage portions 126a and 127a. That is, it is possible to generate a plurality of collision jets, and finally, the high-pressure gas having a relatively low temperature can be discharged from the buffer tank 14 through the flow passage portion 125a. Therefore, the temperature of the high-pressure gas discharged to the buffer tank 14 can be further lowered, and as a result, the temperature of the gas discharged from the exhaust port 15 to the outside of the housing 10 via the buffer tank 14 can be further lowered. Can be lowered.

Further, in the present embodiment, the flow passage portion 127a is formed between the wall portion 125 (wall plate 1251) and the end portion of the collision plate 127 in the front-rear direction.

As a result, after colliding with the collision plate 127, the high-pressure gas that changes the direction of flow toward the flow portion 127a can be made to collide with the wall portion 125 (wall plate 1251), so that the number of times of collision jet generation is further increased. , The temperature of the high-pressure gas discharged into the buffer tank 14 can be further lowered.

Further, the plurality of collision plates 126 and 127 are arranged side by side so as to be separated from each other toward the inside of the accommodation chamber. The collision plate 126 faces the flow portion 127a corresponding to the adjacent collision plate 127, that is, the flow portion 127a is viewed from the direction (vertical direction) in which both the collision plates 126 and 127 are separated from each other. It overlaps with.

As a result, the high-pressure gas that has collided with the collision surface 127 can be guided to the collision plate 126 facing the flow portion 127a through the flow portion 127a and collide with the collision plate 126. That is, since the collision jets can be generated at each of the plurality of collision plates 126 and 127, the number of collision jets can be further increased and the temperature of the high-pressure gas discharged to the buffer tank 14 can be further lowered.

In the present embodiment, two collision plates 126 and 127 are arranged side by side toward the inside of the accommodation chamber, but three or more of them may be arranged side by side, or only one may be arranged.

<Fourth Embodiment>
FIG. 7 is a perspective cross-sectional view showing the structure of an example of the pressure release device 100 according to the fourth embodiment. Specifically, a cross section perpendicular to the left-right direction of the pressure release device 100 is viewed from diagonally above right front. It is a perspective sectional view. FIG. 8 is a perspective sectional view showing the structure and operation of an example of the pressure release device 100 according to the fourth embodiment. Specifically, FIG. 8 is a perspective sectional view of a cross section perpendicular to the left-right direction viewed from diagonally lower right front. Is. Hereinafter, the parts different from those of the first to third embodiments will be mainly described.

As shown in FIGS. 7 and 8, the lid portion 120 is erected on the outer surface of the lid plate 121 and the partition plate 10a as in the second embodiment, and the stud 140 including the enlarged diameter portion 141 is inserted into the tip thereof. Includes insertion hole 124. Further, the lid portion 120 further includes a wall portion 125A provided below the lid plate 121 and collision plates 126A and 127A.

Since the lid plate 121, the insertion hole 124, the stud 140, and the enlarged diameter portion 141 are the same as those in the second embodiment, the description thereof will be omitted.

The wall portion 125A (an example of the first wall portion) consists of two flat plate-shaped wall plates 1251A arranged perpendicular to the front-rear direction and two flat plate-shaped plates arranged perpendicularly to the left-right direction. It has a box shape (rectangular tubular shape) in which the upper end and the lower end are open, including the wall plate 1252A of the above. As a result, the wall portion 125A can surround the collision plates 126A and 127A, which will be described later, inside like the wall portion 125 of the third embodiment.

Further, the upper end of the wall portion 125A is connected to the lower surface of the lid plate 121, and the two wall plates 1251A and the two wall plates 1252A are connected to the wall plates 1251A and 1252A except for the four corner portions. , A rectangular notch portion 125Aa extending from the lower surface of the lid plate 121 is formed. That is, the wall portion 125A is attached to the lower surface of the lid plate 121 at four rectangular corner portions when viewed from directly above in a plan view. The cutout portion 125Aa (an example of the second flow portion) allows the high-pressure gas that collides with the lower surface of the lid plate 121 inside the wall portion 125A to flow toward the outside of the wall portion 125A, that is, toward the buffer tank 14. Fulfill function.

The two wall plates 1251A are arranged so that their positions in the front-rear direction are inside the position in the front-rear direction of the outer edge of the pressure release port 110, respectively. Similarly, the two wall plates 1252A are arranged so that the positions in the left-right direction are inside the positions in the left-right direction of the outer edge of the pressure release port 110, respectively. As a result, the wall portion 125A comes into contact with the partition plate 10a when the lid portion 120 is opened in response to an increase in internal pressure due to an arc failure or the like in the accommodation chamber, as in the wall portion 125 of the third embodiment. It is possible to pass through the pressure release port 110 without doing so.

The collision plate 126A is arranged inside the wall portion 125A so as to be perpendicular to the vertical direction. The collision plate 126A has a substantially cross shape in which rectangular notches 125Aa are provided at four rectangular corners corresponding to a cross section perpendicular to the vertical direction of the wall portion 125A. The cutout portion 125Aa (an example of the first passage portion) functions to allow high-pressure gas to flow from the inside of the accommodating chamber toward the lid plate 121.

The collision plate 127A is arranged inside the wall portion 125A so as to be perpendicular to the vertical direction. The collision plate 127A has a substantially hollow rectangular shape in which a rectangular notch portion 127Aa is provided in a rectangular central portion corresponding to a cross section perpendicular to the vertical direction of the wall portion 125A. The cutout portion 127Aa (an example of the first passage portion) functions to allow high-pressure gas to flow from the inside of the accommodating chamber toward the lid plate 121.

The collision plates 126A and 127A are arranged alternately side by side inside the wall portion 125A so as to be separated in the vertical direction. Specifically, three collision plates 126A, a collision plate 127A, and a collision plate 126A are arranged in this order from the inside of the accommodation chamber toward the lid plate 121.

The number of collision plates 126A and 127A arranged alternately may be arbitrary.

As shown in FIG. 8, when an arc failure or the like occurs inside the accommodation chamber, the lid portion 120 rises in the direction perpendicular to the pressure release port 110 in response to the rise in the internal pressure. Then, in a state where the pressure of the high-pressure gas discharged from the pressure discharge port 110 is relatively high, as described above, the lid plate 121 has a constant height (maximum opening) with respect to the pressure discharge port 110 due to the action of the stopper 123. Height) is maintained.

In this case, the high-pressure gas (solid arrow in the figure) collides with the lower surface of the lowermost collision plate 126A (the part surrounded by the dotted line in the figure).

The gas that collides with the lowermost collision plate 126A then changes the direction of flow toward the cutout portion 125Aa of the collision plate 126A, and then collides with the wall plate 1251A or the wall plate 1252A (in the figure). Dotted line box).

The gas that has collided with the wall plate 1251A or the wall plate 1252A then changes its upward flow direction, passes through the notch portion 125Aa, and collides with the collision plate 127A arranged above it (the part surrounded by the dotted line in the figure). ).

The gas that collides with the lower surface of the collision plate 127A then changes the direction of flow toward the notch 127Aa, passes through the notch 127Aa, and collides with the lower surface of the uppermost collision plate 126A arranged above the notch 127Aa. (The part surrounded by the dotted line in the figure).

The gas that collides with the lower surface of the uppermost collision plate 126A then changes the direction of flow toward the cutout portion 125Aa of the collision plate 126A, and then collides with the wall plate 1251A or the wall plate 1252A (FIG. The part surrounded by the dotted line inside).

The gas that collides with the wall plate 1251A or the wall plate 1252A then changes its upward flow direction, passes through the notch 125Aa, and collides with the lower surface of the lid plate 121 arranged above the notch 125Aa (dotted line in the figure). Enclosed part).

The gas that collides with the lower surface of the lid plate 121 then passes through the notch 125Aa of the wall plate 1251A or the wall plate 1252A (in the drawing, passes through the notch 125Aa of the wall plate 1252A) and is discharged to the buffer tank 14. NS.

As described above, in the present embodiment, the pressure release device 100 includes the collision plates 126A and 127A that are separated from the lid plate 121 inside the accommodation chamber. Further, the pressure release device 100 surrounds the collision plates 126A and 127A and extends from the collision plates 126A and 127A toward the inside of the accommodation chamber, and the lid 120 is opened by the action of the high-pressure gas. In some cases, it includes a wall portion 125A configured to be passable through the pressure release port 110. The pressure release device 100 has a cross section in which the collision plates 126A and 127A exist inside the wall portion 125A, and the cutout portions 126Aa and 127Aa through which the high-pressure gas can flow from the inside to the outside of the accommodating chamber and the wall. A notch 125Aa through which high-pressure gas can pass is included between the portion 125 (wall plates 1251A and 1252A) and the lid plate 121.

As a result, as in the third embodiment, it is possible to generate a plurality of collision jets, and finally, the high-pressure gas having a relatively low temperature can be discharged from the buffer tank 14 through the notch 125Aa. can. Therefore, the temperature of the high-pressure gas discharged to the buffer tank 14 can be further lowered, and as a result, the temperature of the gas discharged from the exhaust port 15 to the outside of the housing 10 via the buffer tank 14 can be further lowered. Can be lowered.

Further, in the present embodiment, the cutout portion 126Aa is formed between the wall portions 125A (wall plates 1251A and 1252A) and the ends (four corners) of the collision plate 126A.

As a result, as in the third embodiment, the high-pressure gas can collide with the wall portions 125A (wall plates 1251A and 1252A), so that the number of collision jets generated is further increased and the high-pressure gas released into the buffer tank 14 The temperature of the gas can be further lowered.

Further, in the present embodiment, the plurality of collision plates 126A and 127A are arranged side by side so as to be separated from each other toward the inside of the accommodation chamber. The collision plate 127A faces the notch 126Aa corresponding to the adjacent lowermost collision plate 126A, that is, the notch is viewed from the direction in which the collision plates 126A and 127A are separated (vertical direction). It overlaps with 125Aa. Further, the uppermost collision plate 126A faces the notch portion 127Aa corresponding to the adjacent collision plate 127A, that is, the notch portion when viewed from the direction (vertical direction) in which the collision plates 126A and 127A are separated from each other. It overlaps with 127Aa. ..

As a result, as in the third embodiment, the collision jets can be generated by each of the plurality of collision plates 126A and 127A (three in total), so that the number of collision jets is further increased and the collision jets are discharged to the buffer tank 14. The temperature of the high-pressure gas can be further lowered.

<Fifth Embodiment>
FIG. 9 is a perspective cross-sectional view showing the structure of an example of the pressure release device 100 according to the fifth embodiment. Specifically, a cross section perpendicular to the left-right direction of the pressure release device 100 is viewed from diagonally above right front. It is a perspective sectional view. FIG. 10 is a side view cross-sectional view showing the structure and operation of an example of the pressure release device 100 according to the fifth embodiment, and specifically, is a cross-sectional view of the pressure release device 100 in a vertical plane in the left-right direction. Hereinafter, the parts different from those of the first to fourth embodiments will be mainly described.

As shown in FIGS. 9 and 10, the lid portion 120 is erected on the outer surface of the lid plate 121 and the partition plate 10a as in the second embodiment, and the stud 140 including the enlarged diameter portion 141 is inserted into the tip thereof. Includes insertion hole 124. Further, the pressure release device 100 further includes a wall portion 150 provided on the outside of the accommodating chamber (outer surface of the partition plate 10a).

Since the lid plate 121, the insertion hole 124, the stud 140, and the enlarged diameter portion 141 are the same as those in the second embodiment, the description thereof will be omitted.

The wall portion 150 is composed of a flat plate-shaped member, and is provided so as to surround the periphery (front-back direction and left-right direction) of each of the three sets of pressure discharge ports 110 and the lid portion 120 on the outside of the storage chamber. Further, the height of the wall portion 150 from the surface of the partition plate is set to be equal to or higher than the maximum opening height of the lid portion 120.

As a result, as shown in FIG. 10, when the lid is opened by the action of the high-pressure gas due to an arc failure in the accommodation chamber, the high-pressure gas (solid line arrow in the figure) collides with the lower surface of the lid plate 121. (The part surrounded by the dotted line in the figure). Then, after the high-pressure gas whose flow direction is changed is made to collide with the wall portion 150 arranged on the side toward the gap between the lid plate 121 and the wall portion 150 (the portion surrounded by the dotted line in the figure), It can be discharged to the buffer tank 14. That is, it is possible to generate a plurality of collision jets, and finally, a high-pressure gas having a relatively low temperature can be discharged to the buffer tank 14. Therefore, the temperature of the high-pressure gas discharged to the buffer tank 14 can be further lowered, and as a result, the temperature of the gas discharged from the exhaust port 15 to the outside of the housing 10 via the buffer tank 14 can be further lowered. Can be lowered.

<Sixth Embodiment>
FIG. 11 is a perspective cross-sectional view showing the structure of an example of the pressure release device 100 according to the sixth embodiment. Specifically, a cross section perpendicular to the left-right direction of the pressure release device 100 is viewed from diagonally above right front. It is a perspective sectional view. FIG. 12 is a side view cross-sectional view showing the structure and operation of an example of the pressure release device 100 according to the sixth embodiment, and specifically, is a cross-sectional view of the pressure release device 100 in a vertical plane in the left-right direction. Hereinafter, the parts different from those of the first to fifth embodiments will be mainly described.

As shown in FIGS. 11 and 12, the lid portion 120 is erected on the outer surface of the lid plate 121 and the partition plate 10a as in the second embodiment and the fifth embodiment, and includes the enlarged diameter portion 141 at the tip thereof. Includes an insertion hole 124 through which the stud 140 is inserted. Further, the pressure release device 100 includes a wall portion 150 provided on the outside of the accommodating chamber (outer surface of the partition plate 10a) as in the fifth embodiment, and further includes a turbulent diffusion member 160.

Since the lid plate 121, the insertion hole 124, the stud 140, and the enlarged diameter portion 141 are the same as those in the second embodiment, the description thereof will be omitted. Further, since the wall portion 150 is the same as that of the fifth embodiment, the description thereof will be omitted.

The turbulent diffusion member 160 has an elongated rod shape. The turbulent diffusion member 160 is a wall portion at a height position equal to or higher than the maximum opening height of the lid portion 120 with reference to the pressure discharge port 110 (partition plate 10a) and at a position outside the end portions in the front-rear direction and the left-right direction. It is arranged along 150 in a manner extending in the front-rear direction and the left-right direction. The turbulent flow diffusion member 160 extending in the front-rear direction may be fixed to each of the two wall plates of the wall portion 150 whose ends thereof are arranged so as to face each other in the front-rear direction. Further, the turbulent diffusion member 160 extending in the left-right direction may be fixed to each of the two wall plates of the wall portion 150 whose both ends are arranged to face each other in the left-right direction.

As a result, as shown in FIG. 12, when the lid is opened by the action of the high-pressure gas due to an arc failure in the accommodation chamber, the high-pressure gas collides with the lower surface of the lid plate 121 and the wall 150 (FIG. 12). The solid arrow inside) can be further guided to pass through the turbulent diffusion member 160. Therefore, the action of the turbulent diffusion member 160 can positively generate turbulent flow in the high-pressure gas, promote heat diffusion in the buffer tank 14, and further lower the temperature of the high-pressure gas. Therefore, the temperature of the high-pressure gas discharged to the buffer tank 14 can be further lowered, and as a result, the temperature of the gas discharged from the exhaust port 15 to the outside of the housing 10 via the buffer tank 14 can be further lowered. Can be lowered.

Although the embodiments for carrying out the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various aspects are within the scope of the gist of the present invention described in the claims. Can be transformed / changed.

<First modification>
In the above-described embodiment, the pressure release device 100 is applied to the switchboard 1, but may be applied to any electric power device in which the power transmission / distribution tilt system is housed inside the housing. For example, the pressure release device 100 may be applied to a metal closed switchgear (cubicle or the like) other than the switchboard 1.

<Second modification>
In the above-described embodiment and modification, the regulation portion (stopper 123 and diameter expansion) for maintaining the state in which the high-pressure gas collides with the lid plate 121 for the lid portion 120 that moves in the vertical direction with respect to the pressure release port 110. Part 141) applies, but is not limited to this aspect. For example, as in the above-mentioned prior art document (Patent Document 1), the lid plate is provided by providing a stopper (an example of a regulating portion) that regulates the rotation angle of the lid plate rotatably supported by the hinge. May be maintained in a state of collision with the high pressure gas. As a result, the same actions and effects as those of the above-described embodiments and modifications are obtained.

<Third modification example>
In the above-described first embodiment and its modification, the leg plate 122 of the lid portion 120 is inserted into the slit hole 130 of the partition plate 10a, but the lid portion 120 can be moved in the direction perpendicular to the pressure release port 110. If possible, any configuration may be adopted. For example, instead of the leg plate 122, a rod-shaped stud (an example of a leg portion) extending downward from the four corners of the lid plate 121 is provided, and instead of the slit hole 130, a round hole is provided in the partition plate 10a, and the lid portion 120 The stud may be inserted into the round hole of the partition plate 10a. Further, in this case, it is preferable to provide a diameter-expanded portion (an example of a regulating portion and a retaining portion) at the lower end of the stud so that the stud of the lid portion 120 does not come out from the round hole of the partition plate 10a. As a result, the same actions and effects as those of the first embodiment are obtained.

<Fourth modification>
In the second embodiment and its modification described above, the stud 140 erected from the partition plate 10a is inserted into the insertion holes 124 provided at the four corners of the lid plate 121, but the lid portion 120 is inserted into the pressure release port 110. Any configuration may be adopted as long as it can be moved in the vertical direction. For example, instead of the stud 140, a flat plate is erected around the pressure discharge port 110 of the partition plate 10a in the direction perpendicular to the pressure discharge port 110, and instead of the insertion hole 124, the flat plate is placed on the lid plate 121. May be provided with a slit hole through which the is inserted. As a result, the same actions and effects as those of the second embodiment are obtained.

<Fifth modification>
In the fifth embodiment and its modification described above, the wall portion 150 is added to the pressure release device 100 according to the second embodiment, but other embodiments (first embodiment, third embodiment, A wall portion 150 may be added to the pressure release device 100 according to the fourth embodiment).

Further, as in the above-mentioned prior art document (Patent Document 1), the wall portion 150 surrounds the lid plate and the opening with respect to the pressure release device having the lid plate rotatably supported by the hinge. May be applied.

Further, for a configuration in which a collision jet plate for generating a collision jet is set separately from the pressure release device (a lid portion that closes the opening), the collision jet plate and the opening are surrounded so as to surround the collision jet plate and the opening. The wall portion 150 may be applied.

As a result, the same actions and effects as those of the fifth embodiment are obtained.

<6th modification>
In the sixth embodiment and its modifications described above, an elongated rod-shaped member is adopted as the turbulent diffusion member 160, but the embodiment is not limited to this as long as it can promote the thermal diffusion of the high-pressure gas. For example, a wire mesh-shaped member may be adopted as the turbulent diffusion member 160. As a result, the same actions and effects as those of the sixth embodiment are obtained.

<7th modification>
Further, in the sixth embodiment and its modification described above, the turbulent diffusion member 160 is added to the pressure release device according to the fifth embodiment, but other embodiments (first embodiment to fourth embodiment). The turbulent diffusion member 160 may be added to the pressure release device 100 according to the embodiment).

Further, as in the above-mentioned prior art document (Patent Document 1), with respect to a pressure release device having a lid plate rotatably supported by a hinge, a turbulent flow diffusion member 160 is provided around the lid plate and the opening. May be added.

Further, with respect to a configuration in which a collision jet plate for generating a collision jet is set separately from the pressure release device (a lid portion that closes the opening), the collision jet plate and the vicinity of the opening are disturbed. A flow diffusing member 160 may be added.

As a result, the same actions and effects as those of the sixth embodiment are obtained.

1 Switchboard 10 Housing 10a-10c Partition plate 11 Busbar room 12 Disconnector room 13 Cable room 14 Buffer tank 15 Exhaust port 16 Exhaust port cover 20 Busbar 21 Insulator 30 Circuit breaker 31 Pullout mechanism 40 Trunk line 41 Insulator 42 Current transformer 50, 60 Disconnector 100 Pressure release device 110 Pressure release port 120 Cover 121 Cover plate 122 Leg plate (leg)
123 Stopper (regulatory part, retaining part)
123a Bolt 123b Nut 124 Insertion hole 125, 125A Wall part (first wall part)
125a Flow section (second flow section)
125Aa notch (second passage)
126,126A Collision plate 126a Flow section (first flow section)
126Aa Notch (first passage)
127,127A Collision plate 127a Flow section (first flow section)
127Aa Notch (first passage)
128 Guide plate 128a Passage part 130 Slit hole (insertion hole)
140 studs (guidance section, standing section)
141 Enlarged diameter part (regulatory part, retaining part)
150 wall part (second wall part)
160 Turbulent diffusion member (diffusion part)

Claims (7)

A housing that houses the power transmission and distribution system,
An opening provided in the housing and
A lid is closed by closing the opening, and a lid is opened by the action of a high-pressure gas that may be generated due to an abnormality in the power transmission / distribution system.
When the lid is opened by the action of the high-pressure gas, the lid-opening operation of the lid is performed so that the state in which the high-pressure gas released from the opening collides with the lid is maintained. Regulatory department to regulate and
When the lid is a lid opened by the action of the high pressure gas, to said mouth opening, Bei example a guide unit for moving the lid in a substantially vertical direction, and
The guide portion includes an insertion hole provided around the opening of the housing.
The lid portion includes a lid plate that covers the opening, a leg portion that extends substantially vertically from the lid plate and is inserted into the insertion hole, and a collision surface that separates the lid plate from the lid plate to the inside of the housing. When the lid portion surrounds the collision surface and extends from the collision surface toward the inside of the housing and the lid is opened by the action of the high-pressure gas, it passes through the opening. A first flow through which the high-pressure gas can flow from the inside to the outside of the housing in a cross section where the possible first wall portion and the collision surface inside the first wall portion exist. A second passage portion through which the high-pressure gas can flow is included between the portion and the first wall portion and the lid plate.
The restricting portion includes a retaining portion provided on the leg portion to prevent the leg portion from coming out of the insertion hole.
Pressure release device. A housing that houses the power transmission and distribution system,
An opening provided in the housing and
A lid is closed by closing the opening, and a lid is opened by the action of a high-pressure gas that may be generated due to an abnormality in the power transmission / distribution system.
When the lid is opened by the action of the high-pressure gas, the lid-opening operation of the lid is performed so that the state in which the high-pressure gas released from the opening collides with the lid is maintained. Regulatory department to regulate and
When the lid is a lid opened by the action of the high pressure gas, to said mouth opening, Bei example a guide unit for moving the lid in a substantially vertical direction, and
The lid portion surrounds and surrounds a lid plate that covers the opening, an insertion hole provided in the lid plate, a collision surface that is separated from the lid plate inside the housing, and a collision surface. A first wall portion that extends from the collision surface toward the inside of the housing and can pass through the opening when the lid portion is opened by the action of the high-pressure gas, and the first wall portion. A first passage portion through which the high-pressure gas can flow from the inside to the outside of the housing, the first wall portion, and the above in a cross section in which the collision surface exists inside the wall portion 1. A second passage portion through which the high-pressure gas can flow is included between the lid plate and the lid plate.
The guide portion includes an erection portion that is erected in a direction substantially perpendicular to the opening in a manner of inserting into the insertion hole around the opening on the outside of the housing.
The restricting portion includes a retaining portion provided on the standing portion and preventing the lid portion from coming off from the standing portion.
Pressure release device. The first flow portion is formed between the first wall portion and the end portion of the collision surface.
The pressure release device according to claim 1 or 2. There are a plurality of collision surfaces,
The plurality of collision surfaces are arranged side by side so as to be separated from each other toward the inside of the housing.
One of the collision surfaces overlaps with the first flow portion corresponding to the other adjacent collision surfaces when viewed from the direction of separation.
The pressure release device according to any one of claims 1 to 3. A second wall portion provided on the outside of the housing is further provided so as to surround the opening and the lid portion.
The pressure release device according to any one of claims 1 to 4. On the outside of the housing, a diffusion portion provided around the opening and the lid to diffuse the high-pressure gas discharged from the opening is further provided.
The pressure release device according to any one of claims 1 to 5. The pressure release device according to any one of claims 1 to 6 is provided.
switchboard.

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