CN220523375U - Explosion-proof pressure release valve for transformer - Google Patents

Abstract

The utility model provides an explosion-proof pressure release valve for a transformer, which is matched with an inner pressure release valve and an outer pressure release valve, so that the device can simultaneously adapt to the pressure release requirements of low-energy and high-energy accidents in an oil tank, can perform air leakage and story indication when the low-energy accidents occur, can effectively release pressure of high-speed shock waves generated by the accidents by rapid explosion of a rupture membrane when the high-energy arc discharge fails, and simultaneously performs audible and visual alarm of dangerous accidents; the produced oil gas mixture of transformer trouble is combustible, and has certain pollution to the air, and this device can lead the fluid mixture to the blast pipe through the cavity that forms between interior oil pipe and the outer oil pipe, carries out centralized processing to the fluid mixture through the blast pipe, prevents to produce the pollution to the air, can prevent simultaneously to produce the dangerous of catching fire deflagration.

Description

Explosion-proof pressure release valve for transformer

Technical Field

The utility model relates to the technical field of pressure relief valves, in particular to an explosion-proof pressure relief valve for a transformer.

Background

The explosion-proof pressure release valve is mainly used for oil tanks of oil immersed power transformers, capacitors, reactors and other devices. When the working pressure is higher than the design standard pressure of the pressure release valve (spring mechanical structure) in the cavity, the pressure is directly released through the internal pressure release valve;

the existing common pressure release valve in the market mainly comprises valve seat, membrane disc, top cover, spring, indication rod, air release plug and other parts. When pressure is generated in the transformer, the transformer oil generates pressure on the membrane disc, when the pressure is larger than the pressure of the spring, the membrane disc starts to move upwards, when the pressure reaches a certain value, the spring is compressed, the transformer oil is discharged, then the pressure is rapidly reduced to a normal value, the membrane disc is restored to the original position under the pressure of the spring, and an indication rod of the pressure release valve is not restored along with the membrane disc after being ejected;

meanwhile, the pressure release capability of the spring mechanical pressure release valve is very limited in the same time, and the pressure release capability is limited by the elastic membrane at the bottom and the internal spring, so that the pressure release valve cannot meet the pressure release requirement when high-energy accidents such as severe arc discharge and the like occur in the oil tank.

In order to achieve the above object, the present utility model provides an explosion-proof pressure release valve for a transformer, which can solve the problems set forth in the background art.

Disclosure of Invention

The utility model adopts the following technical scheme:

the utility model provides an explosion-proof pressure relief valve for transformer, includes outer relief valve, outer relief valve includes interior oil pipe, outer oil pipe, interior oil pipe is located the inside of outer oil pipe, one side of interior oil pipe is equipped with interior oil drain port, the inside outer oil drain port that is equipped with of outer oil pipe, flange joint between interior oil drain port and the outer oil drain port, interior oil drain port with fixedly between the outer oil drain port is equipped with the rupture disk, the surface of rupture disk is equipped with the opening, the opening is the slender bar gap that the circulation is less, the interior oil pipe of outer relief valve passes through the fixed flange connection between interior oil-out and the oil drain port with outer oil pipe, forms two spaces of oil guide passageway and inner chamber, and when oil tank fluid took place the accident, fluid pressure increases, and fluid and oil vapor contact through the direct interior oil pipe inner wall of oil guide passageway of oil inlet, the pressure is arranged to interior relief valve simultaneously.

Preferably, the outer oil pipe bottom is equipped with the mounting disc, interior oil pipe advance oil end with mounting disc fixed connection, be formed with the cavity between interior oil pipe and the outer oil pipe, outer oil pipe one side is equipped with the blast pipe, cavity intercommunication blast pipe and outer oil drain port, the one end of mounting disc is connected with interior oil pipe's oil inlet, the other end is connected with the oil inlet, can directly dismantle the mounting disc when the device intermittent type is with trading and dismantle interior oil pipe inside, conveniently overhaul and wash, simultaneously, the formation of cavity makes interior oil pipe and outer oil pipe form independent space, can prevent seepage and air current backward flow, can lead to the blast pipe department with fluid mixed gas and independently concentrate collection and handle, prevent to cause the pollution to the environment.

Preferably, one side of the outer oil pipe is provided with a control box, an audible-visual annunciator and a controller are arranged in the control box, and the setting control of the control box is convenient for a user to adjust autonomously.

Preferably, a flow detector is arranged in the exhaust pipe and is used for detecting the change of the flow rate of the oil-gas mixture of the oil drain port, the flow detector is electrically connected with the controller, the flow detector is matched with the controller and the audible-visual annunciator, when a high-energy arc accident occurs, a large shock wave is formed, and when the high-energy arc accident seriously exceeds the conventional air drain flow range, the audible-visual annunciator can transmit an electric signal, so that the audible-visual annunciator alarms to warn that the high-energy fault occurs in the outer pressure release valve at the moment, so that a large pressure intensity is generated, the rupture membrane is completely ruptured, and the explosion membrane needs to be replaced in time.

Preferably, be equipped with the oil inlet on the mounting disc, oil inlet one end is connected with the flange connection pad, the oil inlet keep away from the one end of flange connection pad with interior oil pipe is linked together, sets up oil inlet and oil-out, conveniently leads to oil, simultaneously, becomes the connector of putting into place more to be applicable to flange joint in sealing connection, reinforcing relief valve's gas tightness and security.

Preferably, one of the outer oil pipe, which is far away from the flange connection disc, is provided with a cover plate, and an organic glass cap is arranged on the cover plate, so that the transparent organic glass cap is convenient for observing the extending state of the identification rod and is convenient for observing whether the inside is faulty or not.

Preferably, a waterproof board is arranged on one side of the control box, and the waterproof board is in sealing connection with the control box, so that the safety of the control box is improved.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the inner pressure release valve is matched with the outer pressure release valve, so that the device can simultaneously adapt to the pressure release requirements of low-energy and high-energy accidents in the oil tank, air leakage and story indication can be carried out when the low-energy accidents occur, and the high-speed shock waves generated by the accidents can be effectively released by quick explosion of the explosion membrane when the high-energy arc discharge faults occur, and meanwhile, the sound and light alarm of dangerous accidents can be carried out;

2. the traditional pressure release valve can lead the oil pressure to leak around when the oil pressure is led, so that the pressure release oil cannot be led, the device leads the discharged hydraulic oil of the inner oil drain through the outer oil drain, and the oil can be conveniently sent to the oil return tank again;

3. the oil-gas mixture generated by the transformer fault is combustible and has certain pollution to air, the device can guide the oil-gas mixture to the exhaust pipe through the cavity formed between the inner oil pipe and the outer oil pipe, and the oil-gas mixture is intensively treated through the exhaust pipe, so that the pollution to the air is prevented, and meanwhile, the ignition and deflagration danger can be prevented;

4. the flow detector is arranged in the exhaust pipe, so that the state of the rupture disk can be monitored, when the flow value is higher than a preset flow value, namely the rupture disk is ruptured, an audible and visual alarm is sent out at the moment, a high-energy arc discharge accident occurs in the alarm device, the rupture disk is warned to be ruptured, a user can observe a low-energy fault through the warning identifier, and the audible and visual alarm is used for distinguishing whether the high-energy accident occurs or not and checking whether the rupture disk needs to be replaced or not.

Drawings

FIG. 1 is a partial structural mounting cross-sectional view of the present utility model;

FIG. 2 is a cross-sectional view of a portion of the structure of the present utility model;

FIG. 3 is a bottom view of the structure of the present utility model;

FIG. 4 is a cross-sectional view of the internal pressure relief valve structure of the present utility model;

fig. 5 is a schematic diagram of the structure of fig. 2 a according to the present utility model.

In the figure: 1. an outer pressure relief valve; 2. an inner pressure release valve;

101. an inner oil pipe; 102. an outer oil pipe; 103. an inner oil drain port; 104. an outer oil drain port; 105. bursting the membrane; 106. an opening; 107. a mounting plate; 108. a cavity; 109. an exhaust pipe; 110. a control box; 111. an audible and visual alarm; 112. a controller; 113. a flow detector; 114. an oil inlet; 115. a flange connection disc; 116. an organic glass cap; 117. a warning identifier; 118. a waterproof board;

201. a spring mechanism; 202. a pressure release membrane; 203. a sign bar; 204. a pressure sensing port; 205. a support ring; 206. a cover plate; 207. and a limiting seat.

Detailed Description

In order that the utility model may be more fully understood, a more particular description of the utility model will be rendered by reference to the appended drawings, in which several embodiments of the utility model are illustrated, but which may be embodied in different forms and are not limited to the embodiments described herein, which are, on the contrary, provided to provide a more thorough and complete disclosure of the utility model.

It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to the other element, it may be directly connected to the other element or intervening elements may also be present, the terms "vertical", "horizontal", "left", "right" and the like are used herein for the purpose of illustration only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs, and the terms used herein in this description of the utility model are for the purpose of describing particular embodiments only and are not intended to be limiting of the utility model, with the term "and/or" as used herein including any and all combinations of one or more of the associated listed items.

The present utility model will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1-5, in one embodiment of the present utility model, the outer pressure release valve 1 includes an inner oil pipe 101 and an outer oil pipe 102, the inner oil pipe 101 is located inside the outer oil pipe 102, one side of the inner oil pipe 101 is provided with an inner oil drain 103, an outer oil drain 104 is provided inside the outer oil pipe 102, the inner oil drain 103 is connected with the outer oil drain 104 by a flange, a rupture disc 105 is fixedly provided between the inner oil drain 103 and the outer oil drain 104, an opening 106 is provided on the surface of the rupture disc 105, the opening 106 is a slender strip-shaped gap with smaller flow rate, the inner oil pipe 101 and the outer oil pipe 102 of the outer pressure release valve 1 are connected by a fixed flange between an inner oil outlet and an outer oil drain to form two spaces of an oil guide channel and an inner cavity, when an accident occurs in the oil tank, the oil pressure is increased, the oil and the oil vapor are in contact with the inner wall of the inner oil pipe 101 through an oil inlet 114 and the oil guide channel, meanwhile, a small-sized pressurizing accident is led out of the inner pressure release valve 2 through the opening 106, and a warning alarm 117 is performed to perform a preliminary warning alarm effect; one side of the inner oil pipe 101 is fixedly connected with the inner pressure release valve 2, the inner pressure release valve 2 is a spring mechanical pressure release valve, the inner pressure release valve 2 adopts the principle that a spring-triggered mechanical pressure release valve commonly used in actual production can signal the withdrawal of a representation rod when the pressure release film 202 is compressed by pressure, and meanwhile, dangerous pressure can be discharged through the arrangement of a drain port.

Referring to fig. 1-3, a mounting plate 107 is arranged at the bottom of the outer oil pipe 102, an oil inlet end of the inner oil pipe 101 is fixedly connected with the mounting plate 107, a cavity 108 is formed between the inner oil pipe 101 and the outer oil pipe 102, an exhaust pipe 109 is arranged at one side of the outer oil pipe 102, the cavity 108 is communicated with the exhaust pipe 109 and an outer oil drain port 104, one end of the mounting plate 107 is connected with an oil inlet 114 of the inner oil pipe 101, and the other end is connected with the oil inlet 114, so that the mounting plate 107 can be directly detached to detach the inner oil pipe 101 during intermittent replacement of the device, maintenance and cleaning are convenient, meanwhile, the cavity 108 is formed to enable the inner oil pipe 101 and the outer oil pipe 102 to form an independent space, leakage and air flow backflow can be prevented, and oil and mixed gas can be guided to the exhaust pipe 109 for independent centralized collection treatment, and pollution to the environment is prevented;

the flow direction and flow mode of the oil and gas in this embodiment include that one side of the oil tank is connected with the oil inlet 114 of the device, when low-energy small-sized deflagration (such as partial discharge, spark discharge, high temperature, etc.) occurs in the oil tank, the pressure of the oil tank rises slowly, the pressure relief film 202 is pushed to move upwards when the pressure rises to the pressure relief film 202, when the pressure value reaches the opening pressure of the built-in pressure relief valve, the spring mechanism 201 is opened rapidly, meanwhile, the oil and combustible gas mixture can be discharged from the opening 106, and part of the oil and gas mixture moves through one end of the exhaust port of the self-rising tank, so that the combustible gas mixture can be collected intensively through the exhaust port, and pollution to the air is less; when a high arc accident occurs in the oil tank, high pressure shock wave is generated, high pressure enters the spring mechanism 201 of the inner pressure release valve 2 from the oil inlet 114, meanwhile, excessive pressure also extrudes the rupture disc 105, so that the rupture disc 105 is instantaneously ruptured, and high pressure gas and liquid are discharged.

1-5, please refer to the other embodiment of the present utility model, which includes an outer pressure release valve 1 and an inner pressure release valve 2, where the outer pressure release valve 1 includes an inner oil pipe 101 and an outer oil pipe 102, the inner oil pipe 101 is located inside the outer oil pipe 102, one side of the inner oil pipe 101 is provided with an inner oil drain 103, an outer oil drain 104 is provided inside the outer oil pipe 102, the inner oil drain 103 is connected with the outer oil drain 104 by a flange, a rupture membrane 105 is fixedly provided between the inner oil drain 103 and the outer oil drain 104, an opening 106 is provided on the surface of the rupture membrane 105, the opening 106 is a slender strip-shaped gap with smaller flow rate, the inner oil pipe 101 and the outer oil pipe 102 of the outer pressure release valve 1 are connected by a fixed flange between an inner oil outlet and an outer oil drain, so as to form two spaces of an oil guide channel and an inner cavity, when an accident occurs in the oil tank, the oil pressure is increased, the oil and the oil vapor directly contacts the inner wall of the inner oil pipe 101 by an oil inlet 114, and the oil guide channel simultaneously, the inner pressure release valve 2 is discharged, and the accident is primarily led out by the opening 106, and the alarm 2, and the alarm is acted;

one side of the inner oil pipe 101 is fixedly connected with the inner pressure release valve 2, the inner pressure release valve 2 is a spring mechanical pressure release valve, the inner pressure release valve 2 adopts the principle that a spring-triggered mechanical pressure release valve commonly used in actual production can signal the withdrawal of a representation rod when the pressure release film 202 is compressed by pressure, and meanwhile, dangerous pressure can be discharged through the arrangement of a drain port.

Referring to fig. 2, 4 and 5, the inner pressure release valve 2 includes a spring mechanism 201, a pressure release membrane 202 and a flag pole 203, a pressure sensing port 204 is provided at the bottom of the inner pressure release valve 2, the pressure release membrane 202 is installed inside the pressure sensing port 204, a supporting ring 205 is provided at the periphery of the flag pole 203, the spring mechanism 201 is matched with the supporting ring 205, one end of the flag pole 203 is connected with the pressure release membrane 202, when the pressure release membrane 202 is compressed, the flag pole 203 gradually displaces until the spring mechanism 201 pops up rapidly, at this time, the flag pole 203 stretches out rapidly upwards, so as to perform preliminary warning;

the exhaust pipe 109 is internally provided with a flow detector 113, the flow detector is used for detecting the change of the flow of the oil-gas mixture of the oil drain port, the flow detector is electrically connected with the controller 112, the flow detector is matched with the controller 112 and the audible and visual annunciator 111, when a high-energy arc accident occurs, a larger shock wave is formed, and when the high-energy arc accident is seriously beyond the conventional air-leakage flow range, an electric signal can be transmitted, so that the audible and visual annunciator 111 alarms to warn that the inside of the outer pressure relief valve 1 has high-energy faults at the moment so as to generate larger pressure intensity, and the rupture membrane 105 is completely ruptured and needs to be replaced in time;

a cover plate 206 is arranged on one of the outer oil pipes 102 far away from the flange connection disc 115, an organic glass cap 116 is arranged on the cover plate 206, and the transparent organic glass cap 116 is convenient for observing the extending state of the identification rod and observing whether faults occur inside;

one end of the marking rod 203 penetrates through the inner pressure release valve 2 and the cover plate 206, one end of the marking rod 203, which is far away from the inner pressure release valve 2, is located in the organic glass cap 116, a warning mark 117 is arranged inside the organic glass film cap, a limit seat 207 is arranged on the periphery of one end of the marking rod 203, which is far away from the inner pressure release valve 2, the limit seat 207 is slidably connected inside the organic glass cap 116, the connecting seat can prevent the marking rod from sliding out of the organic glass cap 116 due to the negative pressure of the oil tank after returning, a waterproof plate 118 is arranged on one side of the control box 110, the waterproof plate 118 is in sealing connection with the control box 110, and the safety of the control box 110 is improved.

The fault judgment and analysis of the utility model are realized in the following modes: firstly, when a low-energy fault occurs in the pressure release valve, the spring mechanism 201 is started, the warning mark piece 117 is pushed upwards after the mark rod stretches out, so that the warning mark can indicate that the inside of the warning mark piece is faulty, the mark rod cannot be separated from the pushing guiding range of the organic glass cap 116 under the action of the limiting seat 207, when a large-scale high-energy fault occurs, the spring mechanism 201 stretches upwards, the warning mark piece 117 is pushed to the top end, at the moment, the rupture membrane 105 is instantaneously broken, a large amount of escape oil vapor rises to the exhaust port, concentrated exhaust is realized, the flow detector 113 detects that the flux of gas is greatly changed while passing through the exhaust port, and when the instantaneous value is larger than a preset flow value, the flow detector 113 transmits an electric signal to the control box 110, and the control box 110 enables the audible-visual alarm 111 to generate an alarm, so that dangerous mark is conveniently performed.

While the utility model has been described above with reference to the accompanying drawings, it will be apparent that the utility model is not limited to the embodiments described above, but is intended to be within the scope of the utility model, as long as such insubstantial modifications are made by the method concepts and technical solutions of the utility model, or the concepts and technical solutions of the utility model are applied directly to other occasions without any modifications.

Claims (7)

1. An explosion-proof pressure relief valve for transformer, its characterized in that: including outer relief valve (1), outer relief valve (1) includes interior oil pipe (101), outer oil pipe (102), interior oil pipe (101) are located the inside of outer oil pipe (102), one side of interior oil pipe (101) is equipped with interior oil drain (103), the inside outer oil drain (104) that is equipped with of outer oil pipe (102), flange joint between interior oil drain (103) and outer oil drain (104), interior oil drain (103) with be equipped with rupture disk (105) between outer oil drain (104) is fixed, the surface of rupture disk (105) is equipped with opening (106), opening (106) are the less long and thin bar gap of circulation.

2. An explosion-proof pressure relief valve for a transformer as set forth in claim 1, wherein: the bottom of the outer oil pipe (102) is provided with a mounting disc (107), the oil inlet end of the inner oil pipe (101) is fixedly connected with the mounting disc (107), a cavity (108) is formed between the inner oil pipe (101) and the outer oil pipe (102), one side of the outer oil pipe (102) is provided with an exhaust pipe (109), and the cavity (108) is communicated with the exhaust pipe (109) and an outer oil drain port (104).

3. An explosion-proof pressure relief valve for a transformer as claimed in claim 2, wherein: one side of the outer oil pipe (102) is provided with a control box (110), and an audible and visual alarm (111) and a controller (112) are arranged in the control box (110).

4. An explosion-proof pressure relief valve for a transformer as claimed in claim 3, wherein: the inside flow detector (113) that is equipped with of blast pipe (109), flow detector (113) are used for detecting the circulation volume change of oil gas mixture of oil drain port, flow detector (113) with electric connection between controller (112).

5. An explosion-proof pressure relief valve for a transformer as claimed in claim 2, wherein: be equipped with oil inlet (114) on mounting panel (107), oil inlet (114) one end is connected with flange connection pad (115), oil inlet (114) keep away from flange connection pad (115) one end with interior oil pipe (101) are linked together.

6. An explosion-proof pressure relief valve for a transformer as set forth in claim 5, wherein: one side of the outer oil pipe (102) far away from the flange connection disc (115) is provided with a cover plate, an organic glass cap (116) is arranged on the cover plate, and the organic glass cap (116) is used for dangerous warning of high-pressure oil liquid.

7. An explosion-proof pressure relief valve for a transformer as claimed in claim 3, wherein: one side of the control box (110) is provided with a waterproof board (118), and the waterproof board (118) is in sealing connection with the control box (110).