CN220379186U - Explosion-proof device of extra-high voltage equipment - Google Patents

Abstract

The utility model belongs to the technical field of explosion prevention, and relates to an explosion-proof device of extra-high voltage equipment, which comprises an explosion-proof opening mechanism, wherein the explosion-proof opening mechanism comprises a rupture disc holder and a rupture disc fixedly arranged on the rupture disc holder, the rupture disc holder is of a circular ring structure, one end of the explosion-proof opening mechanism is fixedly communicated with an extra-high voltage equipment communication mechanism, the other end of the explosion-proof opening mechanism is fixedly communicated with a flexible relief cavity or a relief cabin, and the extra-high voltage equipment communication mechanism is fixedly communicated with an oil tank and/or an elevating seat of the extra-high voltage equipment. According to the utility model, the rupture disk is used as a pressure release opening condition, the oil gas flexible expansion space or the release channel is provided for the extra-high voltage equipment through the release cabin, the rupture disk and the release channel can be independently combined for different scenes, the explosion-proof device can be arranged at the positions of the oil tank and/or the lifting seat and the like, and the timely release of the insulating oil gas mixture is ensured when an unexpected situation occurs, so that the initiation of explosion accidents is avoided.

Description

Explosion-proof device of extra-high voltage equipment

Technical Field

The utility model belongs to the technical field of explosion protection, and particularly relates to an explosion protection device for extra-high voltage equipment.

Background

The extra-high voltage equipment comprises an extra-high voltage transformer, an extra-high voltage converter transformer, an extra-high voltage reactor, an extra-high voltage alternating current transformer and the like, and an insulating oil is filled in an oil tank of the extra-high voltage equipment to serve as an insulating medium. The extra-high voltage equipment generally has the outstanding characteristics of high voltage grade, large oil tank capacity, complex insulating structure, large oil charge and the like, once penetrating high-energy discharge faults occur in the equipment, the short-circuit current and the fault energy level are obviously higher than those of the conventional grade equipment, and the oil tank structure of the extra-high voltage equipment is easily torn and exploded to cause fire, so that the faults and explosion accidents of the extra-high voltage equipment must be prevented and reduced to the greatest extent.

At present, a pressure release valve is widely adopted as a pressure release device for extra-high voltage equipment, but the response and the opening time of the pressure release valve can be prolonged due to the inertia of a spring by a spring structure of the pressure release valve, so that the explosion accident can not be effectively prevented; and because the runner is complicated, the effective pressure relief area is small, and the pressure relief can not be effectively performed when the explosion fault possibly occurs in the extra-high voltage equipment. The oil tank structure of the extra-high voltage equipment is mainly rigid, has no enough flexible expansion space, can generate a large amount of gas when the explosion fault occurs, causes sudden increase of the pressure in the oil tank of the extra-high voltage equipment, and can cause tearing of the oil tank and explosion accidents once the pressure bearing capacity of the oil tank is exceeded, especially at the positions of welding lines and corner stress concentration. Therefore, it is necessary to design an explosion-proof device for extra-high voltage equipment, and timely and safely discharge the insulating oil-gas mixture.

Disclosure of Invention

In order to solve the technical problems, the utility model provides an explosion-proof device for extra-high voltage equipment, which adopts the following technical scheme:

the utility model provides an extra-high voltage equipment explosion-proof equipment, includes explosion-proof opening mechanism, explosion-proof opening mechanism include rupture disk holder and fixed mounting rupture disk on the rupture disk holder, the rupture disk holder be the ring structure, the fixed intercommunication extra-high voltage equipment intercommunication mechanism of one end of rupture disk holder, the fixed intercommunication flexible chamber or the cabin of releasing of the other end of rupture disk holder, the fixed intercommunication of oil tank and/or rising seat of extra-high voltage equipment intercommunication mechanism and extra-high voltage equipment.

Preferably, the ultra-high voltage equipment communication mechanism comprises a conical pipe, a valve and a connecting pipe which are fixedly communicated in sequence, wherein one end of the conical pipe with a large caliber is fixedly communicated with an oil tank and/or a lifting seat of the ultra-high voltage equipment, and the connecting pipe is fixedly communicated with the rupture disc clamp holder.

Preferably, the number of the two blasting sheet holders is two, the two blasting sheet holders are connected end to end, the blasting sheet fixing clamp is arranged between a pair of blasting sheet holders which are oppositely arranged, one blasting sheet holder is fixedly communicated with the ultrahigh voltage equipment communication mechanism, and the other blasting sheet holder is fixedly communicated with the flexible discharging cavity or the discharging cabin.

Preferably, the rupture disk is made of metal, and the structure of the rupture disk is any one of a positive arch, an inverted arch and a flat plate shape.

Preferably, the flexible cavity of releasing includes pressure release cavity, outside metal protecting crust and connecting tube, outside metal protecting crust fixed mounting in the lateral wall outside of pressure release cavity, connecting tube's one end and pressure release cavity lower surface middle part set up the opening intercommunication, connecting tube's the other end and allies oneself with the pipe intercommunication.

Preferably, the flexible release cavity comprises a pressure release cavity body, a release capsule and a connecting pipeline, wherein the upper part of the pressure release cavity body is opened, one end of the connecting pipeline is communicated with the opening arranged in the middle of the lower surface of the pressure release cavity body, the other end of the connecting pipeline is communicated with the opening arranged in the middle of the lower surface of the pressure release capsule, and the pressure release capsule is positioned at the bottom of the pressure release cavity body.

Preferably, the discharge chamber is of a pipeline structure, and the diameter of the discharge chamber is larger than that of the rupture disc.

Preferably, the outer side of the rupture disc holder is covered with a fixed rain-proof cover.

Preferably, one end of the discharge cabin far away from the rupture disc holder is fixedly communicated with an oil guide pipeline, and one end of the oil guide pipeline far away from the discharge cabin is communicated with an oil discharging pool or used for guiding oil to other safe places.

The utility model has the beneficial effects that:

the explosion-proof device adopts the rupture disk as a pressure release opening condition, provides an oil gas flexible expansion space or an oil guide channel for the extra-high voltage equipment through the flexible discharge cabin and/or the discharge cabin and the oil guide pipeline, can be independently combined with the oil guide channel for different scenes, can be arranged at the positions of an oil tank and/or an elevating seat of the extra-high voltage equipment, ensures timely discharge of an insulating oil gas mixture when accidents occur, and avoids initiation of explosion accidents.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, it will be apparent that the drawings in the description below are some embodiments of the utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of an explosion-proof apparatus according to a first embodiment of the present utility model;

FIG. 2 is a schematic illustration of the structure of one of the flexible relief cavities of the first embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a second embodiment of the flexible relief cavity;

FIG. 4 is a schematic view of a flexible vent lumen in an expanded configuration in accordance with the first embodiment of the utility model;

fig. 5 is a schematic structural diagram of an explosion-proof apparatus according to a second embodiment of the present utility model;

in the figure, 1 is extra-high voltage equipment, 2 is a conical pipe, 3 is a valve, 4 is a connecting pipe, 5 is a rupture disk, 6 is a rupture disk holder, 7 is a rain cover, 8 is a discharge cabin, 9 is a flexible discharge cavity, 10 is a supporting piece, 11 is a fastening screw, 12 is an oil guide pipeline, 91 is a pressure relief cavity, 92 is an external metal protective shell, 93 is a connecting pipeline, and 94 is a pressure relief capsule.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

The whole explosion-proof device can be fixedly arranged at any position of the oil tank and the lifting seat of the extra-high voltage equipment, such as the top or the side wall of the oil tank.

Fig. 1 is a schematic structural diagram of an explosion-proof apparatus according to a first embodiment of the present utility model. The explosion-proof device in the first embodiment is fixedly installed above the oil tank of the extra-high voltage equipment 1. The utility model provides an extra-high voltage equipment explosion-proof equipment, includes explosion-proof opening mechanism, explosion-proof opening mechanism includes rupture disk holder 6 and fixed mounting rupture disk 5 on rupture disk holder 6, rupture disk holder 6 be the ring structure, the fixed intercommunication extra-high voltage equipment intercommunication mechanism of one end of rupture disk holder 6, the fixed intercommunication flexible chamber 9 that releases of the other end of rupture disk holder 6, extra-high voltage equipment intercommunication mechanism and the fixed intercommunication of oil tank and/or rising seat of extra-high voltage equipment.

The extra-high voltage equipment communication mechanism comprises a conical pipe 2, a valve 3 and a connecting pipe 4 which are fixedly communicated in sequence, wherein one end of the conical pipe 2 with larger caliber is fixedly communicated with an oil tank and/or a lifting seat of the extra-high voltage equipment 1, one end with smaller caliber is fixedly communicated with the valve 3, and the inconsistent caliber of the conical pipe 2 can play a role in reducing flow resistance. The valve 3 is provided with valve connecting flanges with integrated structures at two ends, oil resistance is not increased when the valve 3 is completely opened, full-channel discharge can be realized, cast steel, stainless steel, copper or other materials which do not react with medium of extra-high voltage equipment are used as materials of the valve 3, and a knife gate valve is selected under the general condition of the form of the valve 3. The valve 3 is always in an open state when the extra-high voltage equipment 1 is in normal operation, and is closed only when the device is regularly overhauled and other special conditions need to block the oil flow. The end of the conical tube 2 with smaller caliber is welded with a conical tube connecting flange or is designed into a fixed edge of an integrated structure, the end of the conical tube 2 with smaller caliber is directly fixedly connected with the left side of the valve 3 through a high-strength connecting bolt, and a sealing groove is arranged on the valve connecting flange and is in sealing connection by using a sealing gasket. The right side of the valve 3 is connected with the connecting pipe 4, and the sealing mode is the same as that of the conical pipe 2 and the valve 3.

The explosion-proof opening mechanism comprises a pair of rupture disc holders 6 and a rupture disc 5 fixedly arranged between the pair of rupture disc holders 6, wherein the rupture disc holders 6 are of circular ring structures. The rupture disk 5 is matched with the rupture disk holder 6, and the sealing structure between the rupture disk holder 6 and the rupture disk 5 can be sealed by adopting a sealing strip or can be sealed in a face-to-face hard way.

The rupture disk 5 disclosed by the utility model is sensitive, accurate, reliable and free from leakage, has the advantages of unlimited discharge area and wide application range, is suitable for rapid overpressure relief when the inside of the extra-high voltage equipment 1 fails, and solves the problems of long pressure relief time and incapability of effectively relieving pressure of a conventional pressure relief valve.

The outside cover of rupture disk 5 and rupture disk holder 6 establishes fixed mounting rain-proof cover 7, and rain-proof cover 7 fixed mounting is on allies oneself with pipe 4 and flexible cavity 9 that releases, prevents impurity such as ponding, icing, dust and contacts rupture disk 5, plays the effect of protection and extension rupture disk 5 life-span.

The utility model has simple structure and convenient maintenance, the rupture disk is a disposable article, the outer sides of the rupture disk 5 and the rupture disk holder 6 are covered and provided with the rain cover 7, the daily comprehensive protection is realized, and the manual maintenance is not needed. When the valve 3 is closed during regular maintenance or replacement, namely, the extra-high voltage equipment 1 and an external oil channel are disconnected, and the rupture disk 5 and the rupture disk holder 6 can be quickly replaced.

The valve 3 is a connecting component between the conical tube 2 and the connecting tube 4 and is used for blocking an oil way between the rupture disc 5 and the extra-high voltage equipment 1 when the rupture disc 5 and the rupture disc holder 6 are overhauled and replaced, so that the tightness of the extra-high voltage equipment 1 is ensured. The connecting pipe 4 is used for discharging oil or vacuumizing, and is used for overhauling or replacing the rupture disk 5. The rupture disk 5 is a differential pressure type damage pressure relief device, when the internal pressure of the extra-high voltage equipment 1 suddenly rises, the pressure difference at two sides of the rupture disk 5 can be broken or fall off when reaching a preset value, and a relief port is opened, so that an oil gas relief path is formed, and the extra-high voltage equipment is prevented from being deformed, torn and even exploded due to overlarge pressure. The rupture disk 5 must withstand various conditions during installation and operation of the uhv device, such as vacuum, positive pressure test, etc. The material and shape of the rupture disk 5 are selected by considering specific application scenes, and the compatibility of the rupture disk 5 and insulating oil in the equipment is considered, namely, the rupture disk 5 is prevented from being corroded or polluted by the insulating oil due to interaction, and the rupture disk is made of metal or graphite; the shape can be divided into a positive arch, a negative arch and a flat plate, and are not listed here. When the rupture disk 5 is selected, the type and the bursting pressure of the rupture disk 5 are determined according to the internal medium, the using condition and the like of the extra-high voltage equipment, and the discharge area and the caliber of the rupture disk 5 are calculated and checked according to the design specification, so that the selection is completed. The rupture disc holders 6 are respectively assembled on two sides of the rupture disc 5 and used for fixing and clamping the rupture disc 5, the connection part of the rupture disc 5 and the rupture disc holders 6 needs to be guaranteed to be uniformly stressed, the stress is required to meet the requirements of the rupture disc, and the accurate action of the rupture disc is guaranteed. During maintenance and replacement, only the rupture disk 5 can be replaced according to the situation, or the rupture disk 5 and the rupture disk holder 6 are replaced in a whole set.

The life of the rupture disk 5 is limited, and after a certain period of time, maintenance or replacement is necessary, and the specific life and maintenance time have great relations with the selection, working pressure, bursting pressure and the like of the rupture disk 5. When the rupture disk 5 is overhauled, the rupture disk holder 6 is overhauled synchronously, and the rupture disk holder needs to be replaced if damaged. In order to realize the sealing of the extra-high voltage equipment 1 during the maintenance or replacement of the explosion-proof device, and without a large amount of oil drain, the internal components of the transformer are exposed to the air, and the following operations can be performed during the maintenance: closing the valve 3, disassembling the connecting bolts at the position of the valve 3 and the connecting pipe 4, integrally taking down the connecting pipe 4, the rupture disk 5, the rupture disk holder 6, the rain cover 7 and the flexible discharging cavity 9, and completely disassembling the components between the connecting pipe 4 and the flexible discharging cavity 9 for replacement and overhaul. After the maintenance or replacement is finished, the pipeline, the valve and the like between the valve 3 and the rupture disk 5 are cleaned, the reinstallation is carried out after the cleaning of foreign matters is ensured, and then the valve 3 is completely opened to operate again.

Fig. 2 is a schematic structural view of one of the flexible relief cavities according to the first embodiment of the present utility model. The flexible release cavity 9 comprises a release cavity 91, an external metal protecting shell 92 and a connecting pipeline 93, wherein the release cavity 91 is a foldable and telescopic cavity, the elasticity is large, the volume can be compressed to be very small when no pressure impact exists, displacement is generated under the action of pressure, and a large-area release cavity is formed rapidly, so that a flexible expansion space is increased for the flexible release cavity 9, and the functions of fully releasing pressure and supporting an oil-gas mixture sprayed by blasting are achieved. The outer metal protecting shell 92 is fixedly installed on the outer side of the side wall of the pressure release cavity 91, the outer metal protecting shell 92 is provided with weak strength nodes, and the outer metal protecting shell 92 plays a role in compressing the pressure release cavity 91 and provides protection for the pressure release cavity under the general condition, and when pressure impact is received, the weak strength nodes of the outer metal protecting shell 92 are rapidly broken. The connecting pipeline 93 is arranged in the middle of the lower surface of the pressure relief cavity 91, and the connecting pipe 4 is connected through the connecting pipeline 93.

Fig. 3 is a structural plan view of a second flexible relief cavity according to the first embodiment of the present utility model. The flexible relief cavity 9 also can be the structure of relief cavity 91, the relief capsule 94, connecting tube 93, relief capsule 94 lower part opening and connecting tube 93 are direct to be linked together, the relief capsule 94 is located the bottom of relief cavity 91, relief cavity 91 and the gas-air mixture of blasting spun do not direct contact, the relief cavity 91 can be folding, scalable cavity, the upper portion opening of relief cavity 91 communicates with each other with outside atmospheric environment, the relief capsule 94 elasticity is big, the relief capsule 94 can be in the free state and spread in the bottom of relief cavity 91 when no pressure is strikeed, the relief capsule 94 produces the displacement under the pressure effect and expands rapidly, play abundant pressure release, accept the effect of blasting spun gas-air mixture, the relief cavity 91 is used for providing outside protection and support for the relief capsule 94. If the field space is enough, the pressure release cavity 91 may be a fixed non-telescopic rigid structure, so as to meet the release area of the pressure release capsule 94.

Fig. 4 is a schematic structural view of a flexible relief cavity according to a first embodiment of the present utility model in an expanded state. When the explosion fault occurs, a large amount of gas can be generated, so that the pressure in the oil tank of the extra-high voltage equipment is suddenly increased. Once the pressure bearing capacity of the rupture disk 5 is exceeded, the explosion-proof opening mechanism is opened, the rupture disk 5 ruptures and discharges the oil-gas mixture, and the flexible discharging cavity 9 provides a pressure relief space for the rapidly ejected oil-gas mixture after rupture, so that the insulating oil-gas mixture is discharged timely and safely.

Example two

Fig. 5 is a schematic structural diagram of an explosion-proof device according to a second embodiment of the present utility model. The difference between the second embodiment and the first embodiment is that the flexible discharging cavity 9 is replaced by the discharging cabin 8, the conical tube 2, the valve 3, the connecting tube 4, the rupture disk 5, the rupture disk holder 6, the rain cover 7 and the discharging cabin 8 are fixedly arranged at the lower part of the side wall of the oil tank of the extra-high voltage equipment 1, one end of the discharging cabin 8 away from the rupture disk holder 6 is fixedly communicated with the oil guide pipeline 12, and one end of the oil guide pipeline 12 away from the discharging cabin 8 is communicated with the oil discharging pool, or the oil is guided to other safe places. The supporting piece 10 is used for directly supporting the discharge cabin 8 on the foundation, the discharge cabin 8 and the oil guide pipeline 12 are matched to form an oil discharge passage, when the extra-high voltage equipment 1 fails, the rupture disk 5 is broken, insulating oil in the extra-high voltage equipment 1 can be rapidly discharged to an oil discharge tank, or the oil is guided to other safe places, so that the pressure acceleration in the extra-high voltage equipment 1 is rapidly reduced, and the explosion accident is prevented. The fastening bolt 11 passes through one end (left side) of the discharge chamber 8 and one end (right side) of the union 4, sandwiching the rupture disk 5 and the rupture disk holders 6, and the rupture disk 5 and the pair of rupture disk holders 6 are tightly sealed by the clamping force brought by the fastening bolt 11 with high strength. When the fastening bolts 11 are installed, the required moment of the matched rupture disk 5 is required, the uniform stress of all the fastening bolts 11 can be ensured, and uniform and enough clamping force is provided for the sealing of the rupture disk 5 and the rupture disk clamp 6.

The above two embodiments of the present utility model provide two combined application modes of the explosion-proof opening mechanism and the flexible discharging cavity 9, and the explosion-proof opening mechanism and the discharging cabin 8 and the oil guiding pipeline 12, and provide a complete set of solutions for the explosion-proof problem of the extra-high voltage equipment 1 in different application scenarios.

Claims (9)

1. The utility model provides an extra-high voltage equipment explosion-proof equipment, its characterized in that, including explosion-proof opening mechanism, explosion-proof opening mechanism include rupture disk holder (6) and fixed mounting rupture disk (5) on rupture disk holder (6), rupture disk holder (6) be the ring structure, the fixed intercommunication extra-high voltage equipment intercommunication mechanism of one end of rupture disk holder (6), the fixed intercommunication flexible chamber (9) or the cabin (8) of bleeding of the other end of rupture disk holder (6), extra-high voltage equipment intercommunication mechanism and the fixed intercommunication of oil tank and/or the rising seat of extra-high voltage equipment.

2. The ultra-high voltage equipment explosion-proof device according to claim 1, wherein the ultra-high voltage equipment communication mechanism comprises a conical pipe (2), a valve (3) and a connecting pipe (4) which are fixedly communicated in sequence, one large-caliber end of the conical pipe (2) is fixedly communicated with an oil tank and/or a lifting seat of the ultra-high voltage equipment (1), and the connecting pipe (4) is fixedly communicated with a rupture disc holder (6).

3. The ultra-high voltage equipment explosion-proof device according to claim 1, wherein the number of the explosion-proof sheet holders (6) is two, the two explosion-proof sheet holders (6) are connected end to end, the explosion-proof sheet (5) is fixedly clamped between a pair of explosion-proof sheet holders (6) which are oppositely arranged, one explosion-proof sheet holder (6) is fixedly communicated with the ultra-high voltage equipment communication mechanism, and the other explosion-proof sheet holder (6) is fixedly communicated with the flexible discharging cavity (9) or the discharging cabin (8).

4. An explosion-proof device for extra-high voltage equipment according to claim 3, wherein the rupture disk (5) is made of metal, and the structure of the rupture disk (5) is any one of a positive arch, an inverted arch and a flat plate.

5. The ultra-high voltage equipment explosion-proof device according to claim 1, wherein the flexible release cavity (9) comprises a pressure release cavity (91), an external metal protective shell (92) and a connecting pipeline (93), the external metal protective shell (92) is fixedly arranged on the outer side of the side wall of the pressure release cavity (91), one end of the connecting pipeline (93) is communicated with an opening arranged in the middle of the lower surface of the pressure release cavity (91), and the other end of the connecting pipeline (93) is communicated with the connecting pipe (4).

6. The ultra-high voltage equipment explosion-proof device according to claim 1, wherein the flexible relief cavity (9) comprises a relief cavity (91), a relief capsule (94) and a connecting pipeline (93), the upper portion of the relief cavity (91) is opened, one end of the connecting pipeline (93) is communicated with an opening formed in the middle of the lower surface of the relief cavity (91), the other end of the connecting pipeline (93) is communicated with an opening formed in the middle of the lower surface of the relief capsule (94), and the relief capsule (94) is located at the bottom of the relief cavity (91).

7. The ultra-high voltage equipment explosion-proof device according to claim 1, wherein the discharge chamber (8) adopts a pipeline structure, and the diameter of the discharge chamber (8) is larger than that of the rupture disc (5).

8. The ultra-high voltage equipment explosion-proof device according to claim 1, wherein the outer sides of the rupture disc (5) and the rupture disc holder (6) are covered with a fixed rain cover (7).

9. The ultra-high voltage equipment explosion-proof device according to claim 1, wherein one end of the discharge cabin (8) far away from the rupture disc holder (6) is fixedly communicated with an oil guide pipeline (12), and one end of the oil guide pipeline (12) far away from the discharge cabin (8) is communicated with an oil discharging tank.