CN211039827U - Explosion-proof valve - Google Patents
Explosion-proof valve Download PDFInfo
- Publication number
- CN211039827U CN211039827U CN201922032549.XU CN201922032549U CN211039827U CN 211039827 U CN211039827 U CN 211039827U CN 201922032549 U CN201922032549 U CN 201922032549U CN 211039827 U CN211039827 U CN 211039827U
- Authority
- CN
- China
- Prior art keywords
- valve
- spring
- pressure
- oil
- die disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Housings And Mounting Of Transformers (AREA)
Abstract
An explosion-proof valve relates to the technical field of general machinery, and comprises: the valve seat, the die disc, the internal spring, the supporting rod, the valve sleeve, the travel switch, the mark rod, the sealing ring, the protective cover and the oil outlet, wherein the top end of the mark rod extends out of the upper end face of the valve sleeve, the travel switch is installed on the upper end face of the valve sleeve, the die disc is tightly pressed and sealed by the sealing ring under the action of the spring, the stop bolt provided with the pressure spring penetrates through the stop piece and is installed on the opening cover, the pressure of the stop piece for opening the opening cover can be adjusted by utilizing the stop bolt and the pressure spring, the annular groove is formed in the inner wall of the valve sleeve, the ball is installed on the opening cover gasket. The utility model is opened twice, when the pressure in the tank reaches the opening pressure once, the tank can be opened once and can be automatically reset, and the tank has the function of the traditional pressure release valve completely; when the pressure is higher, the valve can be opened for the second time, and the second opening is not reset any more, so that the oil injection area is increased, and the oil injection and pressure relief speed is increased.
Description
The technical field is as follows:
The utility model relates to a general machinery technical field, exactly, it is an oil-immersed power transformer who uses in the transformer technology and has explosion-proof valve for load switch.
Background art:
The oil-immersed power transformer is characterized by that the iron core and winding are immersed in a tank filled with insulating oil to strengthen insulation and improve cooling and radiating conditions. When faults such as serious overload, short circuit, insulation damage and the like occur in the transformer or mechanical faults of an oil-loaded switch occur, the insulating oil is heated and decomposed to generate a large amount of hydrocarbon mixed gas under the action of high temperature or electric arc, so that the pressure in the transformer is increased sharply, and serious consequences such as structural damage, explosion and the like of a transformer oil tank can be caused sometimes. After explosion occurs, the mixed gas, the oil mist and the transformer oil are violently released outwards through a fracture opening of a transformer oil tank, insulating oil leaks from the transformer, a liquid pool is formed on the ground, and pool fire can occur once the insulating oil is ignited carelessly; when the leaked pyrolysis product mixed gas and oil mist are mixed with air, the mixed gas and the oil mist can be ignited and generate secondary explosion. When these conditions occur in confined or congested areas, it is possible to cause very intense explosions. Similarly, if the on-load switch explodes, the bottom of the tank of the on-load switch may be punctured, so that the internal pollution or chain reaction of the transformer is caused, the personnel and equipment are threatened, and the social and economic losses are serious.
Explosion events of oil-immersed transformers or load switches are frequently rare, and at present, a pressure release valve is arranged in a commonly adopted measure for preventing the explosion of the oil-immersed transformers or the load switches. The oil tank or the on-load switch of the oil-immersed transformer can bear a certain pressure, and the pressure relief valve has the function that when the pressure in the oil-immersed transformer or the on-load switch exceeds a certain pressure value, the die disc is slightly opened, oil is sprayed and pressure is relieved, the oil-immersed transformer or the on-load switch is protected from being damaged, and the function of reducing the oil spraying quantity as much as possible is achieved. However, when the fault is large or the tripping is not timely, the internal pressure of the oil-immersed transformer or the load switch can rapidly rise, and the oil tank or the load switch of the oil-immersed transformer can be cracked or exploded due to the overlarge internal pressure when the pressure accumulated and rising cannot be rapidly eliminated due to the limitation of the pressure release valve structure. Therefore, in the prior art, the oil discharge area of the pressure relief valve is limited, and a plurality of pressure relief valves are required to be arranged, so that serious accidents such as rupture and explosion of the oil-immersed power transformer or the load switch can be prevented.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a to the technological improvement of current pressure release valve, its purpose is exactly to provide one kind when oil-immersed power transformer or have load switch internal pressure suddenly rise, can increase the oil spout area, improve the explosion-proof valve of oil spout and pressure release speed.
The utility model aims to realize that the explosion-proof valve,
An explosion-proof valve comprising: disk seat, die disc, internal spring, branch, valve barrel, travel switch, marker post, sealing washer, protection casing, oil-out, the disk seat is fixed on oil-immersed transformer or the flange on having the load switch case lid, and branch utilizes the screw at both ends to fix the disk seat together with the valve barrel, and the die disc spiral-lock that the higher authority was equipped with internal spring and marker post is on the disk seat, is equipped with the sealing washer on the disk seat, and the marker post top is stretched out from the valve barrel upper end face, and travel switch installs on the valve barrel upper end face, its characterized in that: the opening cover and the opening cover gasket are fixed into a whole by using bolts, the adjusting ring is connected with the opening cover through threads, the die disc is tightly pressed and sealed by the sealing ring under the action of a spring, the prepressing force of the spring on the die disc can be adjusted by using the adjusting ring, the push rod with the push rod collision block arranged at the lower end is connected with the stop piece through threads, the distance between the push rod collision block and the die disc can be adjusted by using the threads, the stop bolt with the pressure spring penetrates through the stop piece to be installed on the opening cover, the pressure of the stop piece on the opening cover can be adjusted by using the stop bolt and the pressure spring, the inner wall of the valve sleeve is provided with a ring groove, a ball is installed above the opening cover gasket, between the valve sleeve and the stop piece.
The spring is composed of an inner spring and an outer spring, the outer spring is sleeved outside the inner spring and is installed between the die disc and the adjusting ring together.
The valve seat and the valve sleeve are externally provided with a protective cover which is arranged between the valve seat and the valve sleeve, the side surface of the protective cover is provided with an oil outlet, and oil flowing out of the oil outlet can be led to other containers through a connecting pipe. The protective cover is provided with a through hole, and oil gas can be directly discharged to the air. The valve sleeve is provided with a top cover.
Different protective covers can be selected according to different oil injection modes.
The utility model has the advantages that: 1. the valve is opened twice, and when the pressure in the tank reaches the opening pressure once (a mold disc), the valve is opened once and can be automatically reset, so that the valve has the function of the traditional pressure release valve completely; when the pressure (when the pressure in the tank is instantly and rapidly increased) is higher (the mold disc) the secondary opening is carried out, the secondary opening is (no longer) reset, the oil injection area is increased, the oil injection and pressure relief speed is improved, no matter the pressure in the oil tank of the oil-immersed power transformer or the load switch is slowly increased or suddenly increased, the pressure can be released, and the safe operation of the oil-immersed power transformer or the load switch is ensured. 2. The existing pressure relief valve can be directly replaced by adopting a universal mounting interface design. 3. The oil injection mode can be selected according to different environments and requirements.
Description of the drawings:
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the state of the utility model when the pressure relief is opened for the second time.
Fig. 3 is a schematic view of the directional oil injection mode of the present invention.
Fig. 4 is a schematic view of the protective type spray method of the present invention.
Fig. 5 is a schematic view of the spray method of the present invention.
Detailed Description
Example 1:
The utility model discloses a to the technological improvement upgrading of current pressure release valve, except that sealing washer 20, all can adopt stainless steel material to make, travel switch 13 and resistant oily sealing washer 20 can be in market acquisition. The utility model discloses the current standard preparation that oil-immersed transformer or have load switch interface flange should be pressed to the interface flange size of disk seat 1 to satisfy its commonality.
The utility model utilizes the valve seat 1 to be arranged on a reserved mounting flange on the top surface of an oil immersed transformer or an on-load switch oil tank, and the support rod 5 utilizes the threads at the upper and lower ends to fix the valve seat 1 and the valve sleeve 7 together; the upper part is provided with an inner spring 4, a mark rod 16 and a mould disc 2 which are buckled on the valve seat 1 and sealed by a sealing ring 20 on the valve seat 1; the top end of the marking rod 16 extends out of the upper end face of the protective cover 21, and the travel switch 13 is arranged on the upper end face of the protective cover 21; the structure is basically the same as the prior art. The opening cover 8 and the opening cover gasket 9 are fixed into a whole by bolts 18, and the adjusting ring 12 is connected with the opening cover 8 through threads; the outer spring 3 is sleeved outside the inner spring 4 and is arranged between the die disc 2 and the adjusting ring 12 together, the die disc 2 compresses the sealing ring 20 for sealing under the action of the outer spring 3 and the inner spring 4 through the die disc 2, and the pre-pressure of the outer spring 3 and the inner spring 4 on the die disc 2 can be adjusted by using the adjusting ring 12; the push rod striking block 19 is installed at the lower end of the push rod 6 through threads, the push rod 6 is connected with the stop piece 11 through threads on the upper portion, the distance between the push rod striking block 19 and the die disc 2 can be adjusted through the threads, a stop bolt 14 with a pressure spring 15 and capable of adjusting opening pressure for 2 times (the opening pressure is not manually adjusted and is generated inside an oil tank) penetrates through the stop piece 11 to be installed on the opening cover 8, the pressure of the opening cover 8 on the stop piece 11 can be adjusted through the bolt 14 and the pressure spring 15, and the pressure of the opening cover 8 on the stop piece 11 is adjusted to prevent misoperation of the explosion-proof valve. The inner wall of the valve sleeve 7 is provided with a ring groove 10, a ball 17 is arranged on the opening cover gasket 9 and between the valve sleeve 7 and a retainer 11, part of ball bodies of the ball 17 enter the ring groove 10 in a normal state, and the ball bodies outside the groove are clamped on the upper end surface of the opening cover gasket 9 and the side surface of the retainer 11, so that the opening cover gasket 9 cannot move upwards, the ball 17 cannot be filled to be over-full, and a certain gap is reserved between the ball bodies after the ball 17 returns inwards. The protective cover 21 is installed between the valve seat 1 and the valve sleeve 7, an oil outlet 22 is provided at the side of the protective cover 21, and the oil flowing out from the oil outlet 22 can be led to other containers through a connecting pipe. The outer cover 23 is provided with a through hole 24, and oil gas can be directly discharged into the air.
A top cover 25 is mounted on the valve housing 7. The values of the pressure can be obtained by a limited number of tests.
When the pressure in the oil-immersed transformer or the on-load switch oil tank slowly rises and reaches the opening pressure value specified in JB/T7065-2015 pressure release valve industry Standard for transformers, the die disc 2 overcomes the elastic forces of the outer spring 3 and the inner spring 4 to move upwards, a gap is formed between the die disc 2 and the valve seat 1, and the pressure in the oil-immersed transformer or the on-load switch oil tank is discharged from the gap; after the pressure is reduced, the die plate 2 is reset. And in the lifting process of the die disc 2, the marking rod 16 is jacked up, the top end of the marking rod 16 touches the travel switch 13 to send out an early warning signal, and an operator is reminded to adopt a corresponding processing method.
When the pressure in an oil immersed transformer or an on-load switch oil tank rises sharply in a short time, the die disc 2 is opened for pressure relief for the first time, but the pressure rise in the oil tank cannot be relieved, the jumping height of the die disc 2 is increased, the die disc 2 impacts the push rod collision block 19, the push rod 6 drives the stop piece 11 to overcome the elastic force of the pressure spring 15 to move upwards, the space between the stop piece 11 and the valve sleeve 7 is increased, the ball 17 rolls out of the annular groove 10 completely, the open cover gasket ring 9 which loses the blocking moves upwards quickly, the die disc 2 jumps up from the valve seat 1 quickly along with the disappearance of the pressure of the outer spring 3 and the inner spring 4 under the action of the pressure in the oil tank part, and therefore the purposes of increasing the oil injection area instantly, expanding the oil injection.
Example 2:
The utility model discloses can adopt multiple oil spout mode, what figure 3 given is the utility model discloses a directional oil spout mode, protection casing 21 are installed between disk seat 1 and valve barrel 7, are equipped with oil-out 22 in the side of protection casing 21, can cause oil-out 22 in other containers through the connecting pipe.
Figure 4 shows the protection type scattered spraying mode of the utility model, a through hole 24 is opened on the outer cover 23, and oil gas can be directly discharged into the air.
Figure 5 shows the scattered spraying mode of the present invention, the top cover 25 is installed on the valve sleeve 7, and the space between the valve sleeve 7 and the valve seat 1 is exposed to the environment, so as to reduce the resistance of the oil gas to the maximum.
Claims (5)
1. An explosion-proof valve comprising: disk seat (1), die disc (2), interior spring (4), branch (5), valve barrel (7), travel switch (13), marker post (16), sealing washer (20), protection casing (21), oil-out (22), disk seat (1) is fixed on the flange on oil-immersed transformer or the on-load switch case lid, branch (5) utilize the screw at both ends to fix disk seat (1) and valve barrel (7) together, die disc (2) spiral-lock that the higher authority was equipped with interior spring (4) and marker post (16) is on disk seat (1), be equipped with sealing washer (20) on disk seat (1), marker post (16) top is stretched out from valve barrel (7) up end, travel switch (13) are installed on valve barrel (7) up end, its characterized in that: an opening cover (8) and an opening cover gasket (9) are fixed into a whole by a bolt (18), an adjusting ring (12) is connected with the opening cover (8) by a thread, a die disc (2) is tightly pressed by a sealing ring (20) under the action of a spring for sealing, the prepressing force of the spring on the die disc (2) can be adjusted by the adjusting ring (12), a push rod (6) with a push rod collision block (19) at the lower end is connected with a stop piece (11) by a thread, the distance between the push rod collision block (19) and the die disc (2) can be adjusted by the thread, a stop bolt (14) with a pressure spring (15) passes through the stop piece (11) to be installed on the opening cover (8), the pressure of the stop piece (11) on the opening cover (8) can be adjusted by the stop bolt (14) and the pressure spring (15), a ring groove (10) is arranged on the inner wall of a valve sleeve (7), and a ball (17) is installed on the opening cover gasket (9), Between the valve sleeve (7) and the stopper (11), the ball (17) enters the annular groove (10) in a normal state.
2. The explosion proof valve as defined in claim 1 wherein: the spring consists of an inner spring (4) and an outer spring (3), wherein the outer spring (3) is sleeved outside the inner spring (4) and is arranged between the die disc (2) and the adjusting ring (12) together.
3. The explosion proof valve as defined in claim 1 wherein: a protective cover (21) is arranged outside the valve seat (1) and the valve sleeve (7) and is arranged between the valve seat (1) and the valve sleeve (7), an oil outlet (22) is arranged on the side face of the protective cover (21), and oil flowing out of the oil outlet (22) can be led to other containers through connecting pipes.
4. The explosion proof valve as defined in claim 1 wherein: the outer cover (23) is provided with a through hole (24), and oil gas can be directly discharged into the air.
5. The explosion proof valve as defined in claim 1 wherein: a top cover (25) is arranged on the valve sleeve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922032549.XU CN211039827U (en) | 2019-11-22 | 2019-11-22 | Explosion-proof valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922032549.XU CN211039827U (en) | 2019-11-22 | 2019-11-22 | Explosion-proof valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211039827U true CN211039827U (en) | 2020-07-17 |
Family
ID=71531836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922032549.XU Withdrawn - After Issue CN211039827U (en) | 2019-11-22 | 2019-11-22 | Explosion-proof valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211039827U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725979A (en) * | 2019-11-22 | 2020-01-24 | 沈阳明远电气科技有限公司 | Explosion-proof valve |
-
2019
- 2019-11-22 CN CN201922032549.XU patent/CN211039827U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725979A (en) * | 2019-11-22 | 2020-01-24 | 沈阳明远电气科技有限公司 | Explosion-proof valve |
| CN110725979B (en) * | 2019-11-22 | 2024-09-24 | 沈阳明远电气科技有限公司 | Explosion-proof valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2008353261B2 (en) | A system and method for preventing, protecting OLTC from fire and/or transformer from explosion | |
| KR100779872B1 (en) | Burst Prevention System for Transformer | |
| AU769904B2 (en) | Device for preventing explosions in electrical transformers | |
| US5078078A (en) | Transformer internal fault warning indicator | |
| UA124782C2 (en) | An apparatus for detecting fire and preventing explosion of transformer and a method thereof | |
| US4005341A (en) | Casing construction for pole type dielectric containing transformer | |
| CN211039827U (en) | Explosion-proof valve | |
| CN205845656U (en) | A kind of oil-filled transformer | |
| RU2729888C1 (en) | High-voltage electric equipment fire explosion prevention system | |
| US2904616A (en) | Encased electrical apparatus having pressure relief means | |
| CN110725979B (en) | Explosion-proof valve | |
| CN115621845A (en) | Liquid supplementing and strong sealing liquid-electric effect arc extinguishing device and arc extinguishing method thereof | |
| US3217082A (en) | Snap-action fault protector for electrical apparatus | |
| US4775849A (en) | Gas insulated current transformer | |
| US3772624A (en) | Electrical distribution transformer having pressure relief means | |
| CN202196645U (en) | External oil storage cabinet provided with pressure relief valve | |
| CN215680336U (en) | Self-explosion pressure-release metal expander for mutual inductor | |
| CN104538926A (en) | Protection device for oil-immersed power transformer and protection method | |
| CN113450999A (en) | Oil-immersed transformer explosion venting method based on weak point damage | |
| KR101791859B1 (en) | Decreasing instantaneous pressure and release device for the transformer | |
| KR200296641Y1 (en) | Low loss type pad mounted transformers | |
| CN201084510Y (en) | A transformer anti-explosion elbow | |
| Valenta et al. | Power Transformers and Environmental Protection | |
| CN212230206U (en) | Oil-immersed transformer | |
| CN201562530U (en) | Large-size oil tank anti-explosion pressure releasing device for oil immersed type power transformer and reactor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200717 Effective date of abandoning: 20240924 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20200717 Effective date of abandoning: 20240924 |