JP3034496U - Explosion-proof structure of high-voltage distribution box - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To deform a door in a high-voltage distribution box having a wide door by releasing the pressure from the entire circumference of the door with an extremely simple structure when releasing the pressure due to an increase in internal pressure when a short circuit arc occurs. The amount is reduced and the pressure release gap is narrowed to minimize the scattering of damaged materials to the outside. SOLUTION: In a high-voltage distribution box having a door 2 at an opening on one side surface of a distribution box main body 1, a hinge on one side of the door 2, and a locking metal fitting on the other side, the hinge on the one side is a spring. Through the door 2
Of the slide box 5 provided on the door 2 side can be inserted into the holes of the receiver 6 provided on the main body side, and the slide fittings on the other side can be freely inserted into the holes. An explosion-proof lock 4 that closely supports and supports the door 2 with the main body 1 of the distribution box via a pin 5 or a spring provided on the receiving tool 6, and the door 2
Each slide pin 9 provided on the door 2 is located at the upper and lower ends of the center of the
The explosion-proof locking device 7 that can be freely inserted is provided in the long hole of each receiving device 10 provided in the distribution box body 1.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 This invention relates to an explosion-proof structure for a high-voltage distribution box.

[0002]

[Prior art]

 Conventionally, in a high-voltage distribution box that has a wide door in the opening on one side, a hinge on one side of this door, and a locking metal fitting on the other side, when the short-circuit arc occurs inside this high-voltage distribution box It has an explosion-proof structure that deforms the blast and lets the blast escape to the outside. This is because the hinges and the locking metal fittings are supported via springs, and the bias of these springs keeps the door in close contact with the main body of the distribution box at all times and resists the force of these springs when a short-circuit arc occurs. The hinges and the metal fittings are moving to lift the door from the opening and let the blast escape.

[0003]

[Problems to be solved by the device]

 However, even with such an explosion-proof structure, in the case of a wide door, the deformation due to the blast at the time of the occurrence of the short-circuit arc will be large, and the internal damage may be scattered to the outside through these gaps. Even if the number of explosion-proof locking metal fittings and hinges is increased, the central part of the door will be significantly deformed, so it is necessary to reinforce these parts. However, the reinforcement of this door causes cost increase and inconvenience of handling, such as making the member thick and increasing the number of members.

In view of this, the present invention proposes a high-voltage distribution box having a wide door as described above, which has a very simple structure to release the pressure from the entire circumference of the door when the pressure is released due to an increase in internal pressure such as when a short-circuit arc occurs as described above. (EN) An explosion-proof structure that suppresses the scattering of a damaged material to the outside by compressing it, reducing the amount of deformation of the door and narrowing the pressure release gap, and solving the above problems.

[0005]

[Means for Solving the Problems]

 The invention of claim 1 has a wide door at an opening on one side of the high-voltage distribution box, a hinge is provided on one side of the door, and a locking metal fitting is provided on the other side. The hinge is supported by the door and the distribution box body via a spring, and the spring normally keeps the door and the distribution box body in close contact with each other. A free slide pin can be inserted into a hole of a receiver provided on the main body side, and these slide pins or receivers are supported by a door or a distribution box body via a spring, and normally the spring biases the door and door. The explosion-proof lock is designed to be in close contact with the main body of the distribution box, and the slide pins provided on the door side at the upper and lower ends of the center of the door can be freely inserted into the long holes of the receivers provided on the main body of the distribution box. It has an explosion-proof structure with the explosion-proof lock.

When a short-circuit arc occurs inside the distribution box, the spring supporting the hinge and the explosion-proof lock contracts due to the blast, and the door is pushed. Then, the upper and lower pins at the center of the door move in the long holes of the receptacle of the main body of the distribution box, which causes the door to float from the opening of the main body of the distribution box, and the blast is emitted from the entire outer peripheral edge of the door. To be done.

The invention according to claim 2 is a high-voltage distribution box having a wide door at an opening on one side surface of the high-voltage distribution box, a hinge on one side of the door, and a locking metal fitting on the other side. , The hinge on the one side is supported by the door and the distribution box body via a spring, and the bias of this spring always makes the door and the distribution box body adhere to each other. Slidable slide pins provided on the side of the main body can be inserted into the holes of the receiving device provided on the main body side, and these slide pins or receiving devices are supported by the door or distribution box main body via springs, and this spring is normally used. It is an explosion-proof lock in which the door and the distribution box body are in close contact with each other by the urging of the door.In addition, the slide pins provided on the door side are installed at the upper and lower ends of the center part of the door of the receptacles provided on the distribution box body. It can be freely inserted into the long hole, these slide pins are connected, and each of them can be operated by operating the central part. The explosion-proof structure is provided with an explosion-proof locking device with a structure in which the slide pin is linked and protrudes.

Then, when a short-circuit arc occurs inside the distribution box, the blast causes the springs of the hinge and the locking fitting to contract, pushing the door. Therefore, the upper and lower slide pins at the center of the door move in the long holes of the receiver of the main body of the distribution box, which causes the door to float from the opening of the main body of the distribution box and the blast from the entire circumference of the outer peripheral edge of the door. Is released. In addition, the slide pin in the central part can be put in and taken out of the long hole of each receptacle of the main body of the distribution box by operating the central part of the door at one place.

[0009]

[Embodiment]

 An embodiment of the invention will be described below with reference to the drawings. 1 and 2 show an overall view of a high-voltage distribution box of the present invention, FIG. 1 is a front view thereof, and FIG. 2 is a side view thereof. The distribution box body 1 of this high-voltage distribution box has a wide opening on one side surface, and a wide door 2 that fits this opening. The door 2 is supported on the main body 1 of the distribution box so that it can be opened and closed by two hinges 3 on one side thereof. Further, two explosion-proof locks 4 are provided on the upper and lower sides of the other side of the door 2, and each explosion-proof lock 4 is a projecting slide pin provided on the back side of the door side 2 when the explosion-proof lock 4 is rotated from the outside of the door 2. 5 is inserted into the hole of the receiving tool 6 supported by the distribution box body 1.

Further, each of these receiving members 6 is supported via a spring, and the receiving member 6 is fixed when the spring is biased, and when the spring is contracted, the receiving member 6 moves toward the door 2. It is free to move. Further, an explosion-proof locking member 7 is provided in the middle of the center of the door 2, and a rod 8 is provided so as to project vertically from the explosion-proof locking member 7 on the back side of the door 2, and the upper and lower end portions of the door 2 are provided. The slide pins 9 which can freely project are connected to the tips located at. The distribution box body 1 is provided with a receiver 10 having a long hole through which the slide pins 9 come in and go out. Pillar locks 11 are provided between the explosion-proof locks 4 above and below the door 2.

Next, FIGS. 3 and 4 show a mounting structure of the hinge 3, in which two holes 16 are formed on the outer side of the peripheral edge 15 of the opening 1 a of the main body 1 of the distribution box, and each of these holes 16 has a bolt rod. Each of the bolt rods 17 extends through each of the holes 17, and a central pipe 18 is provided at one end of each of the bolt rods 17 outside the holes 16. Further, the tip of the peripheral edge 15 contacts the packing 19 provided on the back side of the door 2 when the door 2 is closed, and is sealed. Upper and lower pipes 20 and 21 are fixed to the back side of the door 2 on the side of the packing 19 with a space vertically provided therebetween. Then, the central tube 18 is inserted between the upper tube 20 and the lower tube 21, and one hinge pin 22 is inserted through the upper tube 20, the central tube 18 and the lower tube 21 to form the hinge 3. ing. A split pin 22a is provided at the upper end of the hinge pin 22 so that the hinge pin 22 does not come off the upper and lower pipes 20 and 21 and the central pipe 18.

A nut 23 is screwed to the other end of each bolt rod 17, and the coil spring 2 is provided on the outer circumference of each bolt rod 17 between each nut 23 and the peripheral edge of each hole 16. 4 is wound around, and the bolt rod 17 is always pulled in the main body 1 of the distribution box by the force of the coil spring 24. Therefore, the hinge 3 is always fixed.

5 to 8 show the structure of each of the explosion-proof locks 4 described above. Two holes 25 (one of which is not shown) are formed on the inner side of the peripheral edge 15 of the opening 1a of the distribution box body 1. Bolts 26 are bored through the holes 25, and bolts 26 are loosely inserted into the holes 25, and one end of the receiving member 6 is fixed to the ends of the two bolts 26 outside the holes 25. As shown in FIGS. 7 and 8, the receiver 6 is provided with an elliptical hole 27 at the other end, and the elliptical hole 27 extends long along the back side of the door 2. The tip of the peripheral edge 15 contacts the packing 19 provided on the back side of the door 2 when the door 2 is closed, and is sealed. The explosion-proof lock 4 is located outside the door 2 beside the packing 19, the movable shaft 28 of the explosion-proof lock 4 extends to the back side of the door 2, and the movable shaft 28 has a U-shaped cross-section rotary fitting at the location. 29 is fixed, a rotary pin 30 is provided between both sides of the opening of the rotary fitting 29, and a rotary pin collar 30a is capped on the outer periphery of the rotary pin 30.

On the other hand, the slide pin 5 is slidably supported on a slide pin support 31 provided on the back side of the door 2, and two guide metal fittings 32 and 33 having guide holes facing the slide pin 5 are provided. They are provided on the back side of the door 2 at a distance from each other. Further, the receiving tool 6 is located between the guide fittings 32 and 33, and the guide holes of the guide fittings 32 and 33 and the elliptical hole 27 of the receiving tool 6 are located on a straight line. A guide frame body 35 having a slide hole 34 is provided on the side of the slide pin 5, and the rotary pin collar 30a is inserted into the slide hole 34. When the movable shaft 28 is rotated from the outside of the door 2, the rotary fitting 29 is rotated, and the rotary pin 30 in the sliding hole 34 pushes the guide frame body 35 while sliding along the sliding hole 34. This causes the slide pin 5 to slide. Then, the slide pin 5 is inserted into each guide hole of the guide fittings 32 and 33 fixed to the door 2 side and the elliptical hole 27 of the receiving tool 6 protruding from the main body side. FIG. 6 shows this state. When the movable shaft 28 is rotated in the opposite direction, the slide pin 5 moves to the position indicated by the chain double-dashed line in FIG.

Further, as shown in FIG. 5, a nut 36 is screwed to the other end of the two bolt rods 26 that fix the receiving member 6 to the tip, and the nut 36 and the peripheral edge of the hole 25 are connected. A coil spring 37 is wound around the outer circumference of the bolt rod 26 in between, and the urging of the coil spring 37 always pulls the bolt rod 26 into the distribution box body 1.

9 to 11 show the structure of seven places of the explosion-proof locking tool provided in the central portion of the door 2. The movable shaft 40 of the explosion-proof locking device 7 reaches the back side of the door 2, where the central portion of the rotary lever 41 is fixed through. One ends of the rods 8 are fixed to both ends of the rotary lever 41, and these rods 8 extend to upper and lower end portions on the back side of the door 2. The slide pins 9 are fixed to the key-shaped portions 8a at the other ends of these rods 8, and these slide pins 9 are slidable on slide guides 42 provided on the back side of the door 2, respectively. It is supported.

Further, guide metal fittings 43 and 44 having guide holes are provided on the back side of the door 2 at positions facing the slide pins 9 with a space therebetween. When the door 2 is closed, the receiving member 10 supported by the distribution box body 1 projects between the guide fittings 43 and 44. A long hole 45 is bored in the receiver 10, and the slide pin 9 can be inserted into the guide holes of the guide fittings 43 and 44 and the long hole 45 of the receiver 10. Even when the slide pin 9 is inserted into the long hole 45 of the receiver 10, as shown in FIG. 11, there is a gap 45a on one side of the long hole 45, that is, on the door side. When the movable shaft 40 is rotated from the outside of the door 2, the rotary lever 41 rotates around the movable shaft 40, whereby the rods 8 symmetrically rotate. The slide pins 9 are adapted to move in and out of the elongated holes 45 of the receiving device 10 in association with the rotation of the rods 8.

In the embodiment described above, the door 2 in FIG. 1 is closed, and the slide pins 5 of the upper and lower explosion-proof locks 4 on the left side of the door 2 are inserted into the elliptical holes 27 of the receiver 6, and the pillar When the lock 11 is locked and the upper and lower slide pins 9 of the explosion-proof locking device 7 in the central portion are inserted into the long holes 45 of the upper and lower receiving devices 10, respectively, a short circuit occurs in the distribution box body 1. When an arc is generated, the internal pressure rapidly rises, and several tons of pressure is applied to the door 2. At this time, the coil spring 37 of each explosion-proof lock 4 on the left side of the door 2 in FIG. 1 contracts, and the bolt rod 26 serves as a guide to cause the receiver 6 to pop out in front of the distribution box body 1. Further, the coil spring 24 of each hinge 3 on the right side of the door 2 in FIG. 1 contracts, and the bolt rod 17 serves as a guide so that the central pipe 18 pops out in front of the distribution box body 1.

Therefore, the door 2 is separated from the opening 1a of the distribution box body 1 and a gap of several cm is formed. At that time, since there is a gap in the long hole 45 of the receiving member 10 into which the slide pin 9 at the central portion is inserted, the slide pin 9 moves in the long hole 45 and does not hinder the movement of the door 2. Further, when the maximum pressure is released, a force is applied to the upper and lower receivers 10 in the central portion. Then, when the door 2 is separated from the opening 1a to release the gas generated inside through the gap and the pressure of the distribution box body 1 is reduced, the door 2 is closed again by the force of the coil springs 24 and 37. In these cases, the pillar lock 11 of the door 2 is appropriately deformed and disengaged from the clasp when the door 2 is moved.

In the above embodiment, the explosion-proof locking device 7 in the central portion of the door 2 is provided with a movable shaft 40 in the middle of the vertical direction of the door 2, and the rotation of the movable shaft 40 causes the explosion-proof locking device 7 to move up and down. Although the slide pin 9 can be freely put in and taken out of the elongated holes 45 of the upper and lower receivers 10 on the main body side, the present invention is not limited to this configuration, and the upper and lower slide pins 9 may be operated respectively. Further, in the above-described embodiment, the receiving tool 6 is provided with the elliptical hole 27 into which the slide pin 5 is inserted. However, this need not be an elliptical hole and may be any appropriate hole. Further, the coil spring 24 of the hinge 3 and the coil spring 37 of the explosion-proof lock 4 are not limited to this, and an appropriate spring may be used. Further, although the receiver 6 is supported by the coil spring 37 in the above-described embodiment, either the receiver 6 or the slide pin 5 is supported by the spring such that the slide pin 5 itself is slidably supported by the spring. Any structure will do.

[0021]

[Effect of the invention]

 The invention according to claim 1 has a wide door at the opening on one side of the high-voltage distribution box, and has a hinge on one side of this door and a locking metal fitting on the other side. Even if there is a short-circuit arc, etc., if the internal pressure rises sharply, the pressure is released from the entire circumference of the door, so the gap width between the door and the opening at the time of pressure release is narrowed, and the internal damage is exposed to the outside. It is possible to suppress the scattering of. The amount of deformation of the door is proportional to the square of the width of the door, but in this consideration, since the explosion-proof locking device is provided at the center of the door, the amount of deformation of the door is 1 / th compared to the explosion-proof structure on both sides. It can be 4 or less.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, since the upper and lower slide pins of the explosion-proof stopper in the central portion of the door are connected, the upper and lower slide pins can be operated by one operation. Works and is extremely easy to operate.

[Brief description of the drawings]

FIG. 1 is a front view of a distribution box according to an embodiment of the present invention.

FIG. 2 is a side view of the distribution box in the embodiment of the present invention.

FIG. 3 is a cross-sectional explanatory view of a hinge portion in the embodiment of the present invention.

FIG. 4 is an explanatory longitudinal sectional view of a hinge portion in the embodiment of the present invention.

FIG. 5 is a cross-sectional explanatory view of the explosion-proof lock portion in the embodiment of the present invention.

FIG. 6 is a rear explanatory view of the explosion-proof lock portion in the embodiment of the present invention.

FIG. 7 is a plan view showing a receiving member and a bolt rod used for the explosion-proof lock in the embodiment of the present invention.

FIG. 8 is a side view showing a receiver and a bolt rod used for the explosion-proof lock in the embodiment of the present invention.

FIG. 9 is a partial vertical cross-sectional explanatory view of the explosion-proof locking part in the embodiment of the present invention.

FIG. 10 is a partial rear view of the explosion-proof locking member according to the embodiment of the present invention.

FIG. 11 is a partial vertical cross-sectional view of the explosion-proof locking part in the embodiment of the present invention.

[Explanation of symbols]

1 Distribution box main body 2 Door 3 Hinge 4 Explosion-proof lock 5 Slide pin 6 Receiving device 7 Explosion-proof locking device 8 Rod 9 Slide pin 10 Receiving device 15 Periphery 17 Bolt rod 18 Central pipe 19 Packing 20 Upper pipe 21 Lower pipe 22 Hinge pin 23 Nut 24 Coil spring 26 Bolt rod 27 Elliptical hole 28 Movable shaft 29 Rotating metal fitting 30 Rotating pin 31 Slide pin support tool 34 Sliding hole 35 Guide frame body 36 Nut 37 Coil spring 40 Movable shaft 41 Rotating lever 42 Sliding guide 45 Long hole

Claims (2)

[Utility model registration claims] 1. A high-voltage distribution box having a wide door in an opening on one side surface of the high-voltage distribution box, a hinge on one side of the door, and a locking metal fitting on the other side, wherein the hinge on one side is a spring. It is supported by the door and the main body of the distribution box via the, and the bias of this spring always keeps the door and the main body of the distribution box in close contact with each other, and the locking metal fitting on the other side is a slidable slide provided on the door side. Pins can be inserted into the holes of the receivers provided on the main body side, and these slide pins or receivers are supported by the door or distribution box body via springs, and the springs normally bias the doors and distribution box body. Explosion-proof lock in which the door and the slide pins provided on the door side are freely inserted into the long holes of the receivers provided on the main body of the distribution box. Explosion-proof structure characterized by the provision of a locking tool. 2. A high-voltage distribution box having a wide door at an opening on one side surface of the high-voltage distribution box, a hinge on one side of the door, and a locking metal fitting on the other side, wherein the hinge on one side is a spring. It is supported by the door and the main body of the distribution box via the, and the bias of this spring always keeps the door and the main body of the distribution box in close contact with each other, and the locking metal fitting on the other side is a slidable slide provided on the door side. Pins can be inserted into the holes of the receivers provided on the main body side, and these slide pins or receivers are supported by the door or distribution box body via springs, and the springs normally bias the doors and distribution box body. And the explosion-proof lock so that the door and the close contact with each other, the slide pins provided on the door side at the central upper and lower ends of the door can be freely inserted into the long holes of the receivers provided on the main body of the distribution box. By connecting the slide pins of, the operation of the center part causes each slide pin to interlock and project. Explosion-proof structure characterized by having a built-in explosion-proof lock.