阅读说明：本技术 一种电力设备压力释放装置 (Pressure release device of power equipment ) 是由 李金忠 张书琦 程涣超 汪可 梁宁川 李刚 徐征宇 赵晓林 赵志刚 王琳 孙建涛 于 2020-12-16 设计创作，主要内容包括：本发明涉及一种电力设备压力释放装置,包括气囊和爆破片,所述气囊包括囊体和连接法兰,所述囊体连接在所述连接法兰上,所述连接法兰的中心开设有通孔,所述爆破片固定连接在所述连接法兰的通孔处；其中,所述连接法兰用于连接在电力设备的泄压口处。本发明提供的电力设备压力释放装置,采用气囊结构,气囊通过连接法兰连接在电力设备的泄压口处,连接法兰上设置的爆破片,能够提高电力设备泄压的开启时间和压力泄放速率,同时气囊能够将电力设备泄放的气体及液体与外部空气相隔绝,降低了燃烧、爆炸的风险,还能防止泄放的气体和液体排放至外界造成污染。(The invention relates to a pressure release device of electrical equipment, which comprises an air bag and a rupture disk, wherein the air bag comprises an air bag body and a connecting flange, the air bag body is connected to the connecting flange, a through hole is formed in the center of the connecting flange, and the rupture disk is fixedly connected to the through hole of the connecting flange; wherein, flange is used for connecting at power equipment's pressure release mouth department. The pressure release device for the power equipment adopts an air bag structure, the air bag is connected to a pressure relief opening of the power equipment through the connecting flange, and the rupture disk arranged on the connecting flange can improve the opening time and the pressure relief rate of the pressure relief of the power equipment, and meanwhile, the air bag can isolate gas and liquid released by the power equipment from external air, so that the risks of combustion and explosion are reduced, and the released gas and liquid can be prevented from being discharged to the outside to cause pollution.)

1. The pressure release device for the power equipment is characterized by comprising an air bag and a rupture disk, wherein the air bag comprises an air bag body and a connecting flange, the air bag body is connected to the connecting flange, a through hole is formed in the center of the connecting flange, and the rupture disk is fixedly connected to the through hole of the connecting flange; wherein, flange is used for connecting at power equipment's pressure release mouth department.

2. The electrical equipment pressure relief device of claim 1, wherein the bladder further comprises a top cover, the bladder body is connected between the connecting flange and the top cover, and a support rod is disposed between the connecting flange and the top cover.

3. The electrical equipment pressure relief device according to claim 2, wherein the support rod is of a telescopic structure and comprises an outer tube and an inner rod which are sleeved together, the inner rod is slidably connected to the outer tube, the outer tube is fixedly connected to the connecting flange, and the inner rod is fixedly connected to the top cover.

4. The pressure relief device for electrical equipment according to claim 2 or 3, wherein the number of the support rods is multiple, and the support rods are distributed on the connecting flange in an annular array around the center of the through hole.

5. The electrical equipment pressure relief device of claim 2, wherein the air bag is filled with a protective gas at a predetermined pressure, the predetermined pressure being greater than a standard atmospheric pressure.

6. The pressure relief device according to claim 5, wherein said top cover has an air duct, said air duct has a check valve therein, and said protection gas is filled into said air bag through said air duct.

7. The power equipment pressure relief device of claim 5, wherein the top cover is provided with a pressure sensor, a sensing end of the pressure sensor is located in the air bag, and the pressure sensor is used for detecting a pressure value in the air bag.

8. The electrical equipment pressure relief device of claim 2, wherein an exterior of the air bladder is provided with a cover that covers an exterior surface of the air bladder.

9. The electrical equipment pressure relief device of claim 8, wherein the outer cover is a uv-protected polyethylene film.

10. The electrical pressure relief device of claim 1, wherein the bladder is made of a rubber material.

Technical Field

The invention relates to the technical field of power equipment, in particular to a pressure release device of power equipment.

Background

The pressure release device is a pressure protection device of the power equipment, most of the pressure release devices commonly used in the power equipment are spring structure pressure release valves at present, and when the pressure exceeds the setting value of the pressure release device, the pressure can be effectively released, and the safe operation of the power equipment is ensured. However, when a serious failure occurs inside the electric power equipment, the insulating oil inside the electric power equipment is decomposed to generate a large amount of gas. Because the power equipment box is usually designed in a closed manner, the spring opening time is relatively slow, the pressure relief efficiency is low, a large amount of gas generated inside the power equipment box cannot be effectively released during failure, the internal pressure of the power equipment rises sharply, the weak point of the box at the failure part of the power equipment is broken, high-temperature oil gas is leaked, combustion and explosion can be caused in severe cases, and the safe operation of the power equipment is seriously influenced.

Disclosure of Invention

In view of the above, the present invention is directed to a pressure relief device for electrical equipment, which is capable of releasing gas and liquid at a high pressure release speed, so as to solve the problems in the prior art.

The invention provides a pressure release device of electrical equipment, which comprises an air bag and a rupture disk, wherein the air bag comprises an air bag body and a connecting flange, the air bag body is connected to the connecting flange, a through hole is formed in the center of the connecting flange, and the rupture disk is fixedly connected to the through hole of the connecting flange; wherein, flange is used for connecting at power equipment's pressure release mouth department.

Preferably, the gasbag still includes the top cap, the utricule is connected between flange and the top cap, flange with be equipped with the bracing piece between the top cap.

Preferably, the bracing piece is retractable structure, including establishing outer tube and interior pole together at the cover, interior pole sliding connection be in on the outer tube, the outer tube fixed connection be in on the flange, interior pole fixed connection be in on the top cap.

Preferably, the number of the supporting rods is multiple, and the supporting rods are distributed on the connecting flange in an annular array by taking the circle center of the through hole as the center.

Preferably, the air bag is filled with a protective gas with a preset pressure, and the preset pressure is greater than the standard atmospheric pressure.

Preferably, the top cover is provided with an air duct, a check valve is arranged in the air duct, and the protective gas is filled into the air bag through the air duct.

Preferably, a pressure sensor is arranged on the top cover, a sensing end of the pressure sensor is located in the air bag, and the pressure sensor is used for detecting a pressure value in the air bag.

Preferably, the exterior of the air bag is provided with a cover which covers the outer surface of the air bag.

Preferably, the outer cover is a uv-resistant polyethylene film.

Preferably, the bladder is made of a rubber material.

The invention provides a pressure release device for electrical equipment, which adopts an air bag structure, wherein a through hole communicated with a pressure relief port of the electrical equipment is arranged on a connecting flange of an air bag, a rupture disk is arranged at the through hole to isolate the inner space of the air bag from the inner space of the electrical equipment, when the inner pressure of the electrical equipment exceeds the bearing pressure value of the rupture disk, the rupture disk ruptures, and gas and liquid in the electrical equipment can enter the air bag instantly. Compare in current pressure release valve, the pressure release who adopts gasbag and rupture disk to constitute can improve the opening time and the pressure rate of releasing of power equipment pressure release, and the gasbag can be isolated with the gas and the liquid of power equipment release and outside air phase simultaneously, has reduced the risk of burning, explosion, can also prevent that the gas and the liquid of releasing from discharging to the external world from causing the pollution.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a pressure relief device for electrical equipment according to an embodiment of the present invention, which is installed in the electrical equipment under normal conditions.

Fig. 2 is a schematic structural diagram illustrating a pressure relief structure of an electrical equipment pressure relief device installed on an electrical equipment according to an embodiment of the present invention.

In the figure: the air bag comprises an air bag 1, a connecting flange 11, a through hole 111, a bag body 12, a top cover 13, a rupture disk 2, a holder 21, a support rod 3, an outer tube 31, an inner rod 32, an air duct 4, a pressure sensor 5, an outer cover 6, electric equipment 7 and a pressure relief opening 71.

Detailed Description

Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.

The invention provides a pressure release device of electrical equipment, which comprises an air bag 1 and a rupture disk 2, wherein the air bag 1 comprises an air bag body 12 and a connecting flange 11, the air bag body 12 is connected to the connecting flange 11, the center of the connecting flange 11 is provided with a through hole 111, and the rupture disk 2 is fixedly connected to the through hole 111 of the connecting flange 11; the connection flange 11 is used for connecting to a pressure relief opening 71 of the electrical device 7.

Specifically, utricule 12 adopts rubber materials to make, can produce the inflation under the pressure effect, and flange 11 adopts metal material to make, like carbon steel board, corrosion resistant plate etc. flange 11 is circular platelike structure, and circular through-hole 111 has been seted up at flange 11's center, and flange 11 passes through bolted connection in power equipment 7's pressure release mouth 71 department, still is provided with rubber seal between flange 11 and the power equipment 7, guarantees to effectively seal between the faying face between the two. The rupture disk 2 is fixedly connected to the inner side face of the connecting flange 11 through a clamp 21, the clamp 21 can be fixedly connected to the connecting flange 11 through bolts, and a sealing element is arranged between the clamp 21 and the connecting flange 11 for effective sealing. When the connecting flange 11 is connected to the pressure relief opening 71 of the electrical equipment 7, the circular through hole 111 on the connecting flange 11 communicates with the pressure relief opening 71 on the electrical equipment 7. When capsule 12 is connected with flange 11, through set up metal layering or ferrule at the edge of capsule 12 with flange 11's contact end, with capsule 12 fixed connection on flange 11 through metal layering or ferrule, metal layering accessible bolt is connected with flange 11, and capsule 12 still can set up sealed glue in the contact department with flange 11 and effectively seals, prevents to reveal.

Further, the airbag 1 further comprises a top cover 13, the capsule body 12 is connected between the connecting flange 11 and the top cover 13, and the support rod 3 is arranged between the connecting flange 11 and the top cover 13.

Specifically, capsule 12 is a cylindrical structure with two open ends, the lower end opening of capsule 12 is connected to connecting flange 11, and the upper end opening of capsule 12 is connected to top cover 13. The top cover 13 is made of metal material, such as carbon steel plate, stainless steel plate, etc., and the top cover 13 is also in a circular plate-shaped structure. The connection between capsule 12 and cap 13 is of the same type as the connection between capsule 12 and connecting flange 11. Because top cap 13 is the metal material, it is heavier for the utricule 12 weight of rubber material, through set up bracing piece 3 between top cap 13 and flange 11, bracing piece 3 can support top cap 13, makes and keeps predetermineeing the distance between top cap 13 and the flange 11, makes this pressure relief device can keep inside to be the cavity structure under normal operating mode.

Further, the support rod 3 is a telescopic structure, the support rod 3 includes an outer tube 31 and an inner rod 32 which are sleeved together, the inner rod 32 is slidably connected to the outer tube 31, the outer tube 31 is fixedly connected to the connecting flange 11, and the inner rod 32 is fixedly connected to the top cover 13.

Specifically, the length of the inner rod 32 is greater than that of the outer tube 31, the outer diameter of the inner rod 32 is matched with the inner diameter of the outer tube 31, the inner rod 32 is inserted into the outer tube 31, the top of the inner rod 32 is fixedly connected to the top cover 13, and the bottom of the outer tube 31 is fixedly connected to the connecting flange 11. In this embodiment, the inner rod 32 and the outer tube 31 are both made of seamless steel tubes made of carbon steel, the top of the inner rod 32 is welded and fixed on the top cover 13, and the bottom of the outer tube 31 is welded and fixed on the connecting flange 11; in other alternative embodiments, the top of the inner rod 32 and the bottom of the outer tube 31 may also be provided with a connecting plate, the connecting plate at the top of the inner rod 32 is fixedly connected to the top cover 13 by screws, and the connecting plate at the bottom of the outer tube 31 is fixedly connected to the connecting flange 11 by screws. The bracing piece 3 sets up to extending structure, and during the electrical equipment pressure release, bracing piece 3 can play the guide effect to top cap 13 to the security when the inflation direction of control utricule 12 guarantees gasbag 1 pressurized inflation.

The number of the support rods 3 can be multiple, and the support rods 3 are distributed on the connecting flange 11 in an annular array with the center of the through hole 111 as the center. Through setting up a plurality of bracing pieces 3, can make the top cap 13 of gasbag 1 obtain stable support, make it keep stable shape under normal operating mode. In this embodiment, the number of the support rods 3 is two, and the two support rods 3 are arranged at an interval of 180 ° in the circumferential direction of the connecting flange 11.

In the pressure release device, protective gas with preset pressure is filled in an air bag 1, and the preset pressure is greater than the standard atmospheric pressure. By filling the airbag 1 with the protective gas, the shape of the bag body 12 of the airbag 1 can be kept stable under normal conditions when the pressure relief device is mounted on the power equipment 7. The protective gas is inert gas, such as argon gas and the like, and after gas and liquid in the power equipment 7 enter the air bag 1 during pressure relief, the inert gas can ensure that the released oil gas is collected in the air bag 1 and cannot be combusted, so that the safety of the air bag is ensured. The pressure of the protective gas filled in the airbag 1 is greater than the standard atmospheric pressure, and there is a certain pressure difference between the power device 7 and the airbag 1.

The top cover 13 is provided with an air duct 4, the air bag 1 can be filled with protective gas with preset pressure through the air duct 4, and the protective gas is filled into the air bag 1 through the air duct 4 during filling. In order to prevent the protective gas from leaking from the air duct 4 after being filled, a check valve is arranged in the air duct 4, the check valve is a one-way valve, the protective gas enters the air bag 1 from the outside of the air bag 1, and the protective gas in the air bag 1 cannot leak out through the air duct 4. The air duct 4 can also be arranged as a tire inflation nozzle structure as long as the air duct 4 can be sealed after inflation to prevent air leakage.

The top cover 13 is also provided with a pressure sensor 5, the sensing end of the pressure sensor 5 is positioned in the air bag 1, and the pressure sensor 5 is used for detecting the pressure value in the air bag 1. Through setting up pressure sensor 5, can detect the pressure in gasbag 1 in real time, make gasbag 1 work under its tolerance intensity, the security when guaranteeing to use.

Further, a cover 6 is provided outside the airbag 1, and the cover 6 covers the outer surface of the airbag 1. When the bag body 12 of the air bag 1 is made of rubber materials, the rubber is easy to age under the conditions of ultraviolet rays, rainwater and the like, and the safety of the air bag in use is affected, so the outer cover 6 is arranged outside the air bag 1 to protect the bag body 12 of the air bag 1. The outer cover 6 is used for isolating factors which can cause the aging of the air bag 1, such as ultraviolet rays, wind, rainwater and the like, and plays a certain role in heat preservation, so that the pressure release device can be applied to cold regions. In this example, the outer cover 6 is a polyethylene film that is ultraviolet-proof. The middle part of dustcoat 6 can set up the annular layering, and the annular layering passes through the bolt fastening in the outside of 1 top cap 13 of gasbag, and the outside of dustcoat 6 can be hung and establish the heavy object and prevent to receive the wind force influence swing, makes it stably cover in the utricule 12 outside of gasbag 1 to cover utricule 12 completely, thereby protect gasbag 1, increase its life.

Fig. 1 and fig. 2 are schematic diagrams of the pressure relief device installed on an electrical device under normal conditions and after pressure relief. It can be seen that, under normal operating conditions, the rupture disk 2 is disposed at the through hole 111 of the connecting flange 11, and effectively isolates insulating oil and gas in the electrical equipment 7 from protective gas in the airbag 1. When power equipment 7 internal pressure surpassed rupture disk 2's the pressure value of bearing, rupture disk 2 broke, inside insulating oil and the gas of power equipment 7 can enter into gasbag 1 in the twinkling of an eye, and gasbag 1's utricule 12 pressurized inflation, top cap 13 moves along the direction of keeping away from flange 11 under retractable bracing piece 3's guiding action.

Compare in current pressure release valve, the pressure release who adopts gasbag and rupture disk to constitute can improve the opening time and the pressure rate of releasing of power equipment pressure release, and the gasbag can be isolated with the gas and the liquid of power equipment release and outside air phase simultaneously, has reduced the risk of burning, explosion, can also prevent that the gas and the liquid of releasing from discharging to the external world from causing the pollution.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.