CN113823522B

CN113823522B - Gas relay

Info

Publication number: CN113823522B
Application number: CN202111137273.7A
Authority: CN
Inventors: 沈谢林; 黄峰铭; 许俊泗
Original assignee: Quanzhou Power Supply Co of State Grid Fujian Electric Power Co Ltd; Quanzhou Economic and Technological Development Branch of Quanzhou Yixing Electric Power Engineering Construction Co Ltd
Current assignee: Quanzhou Power Supply Co of State Grid Fujian Electric Power Co Ltd; Quanzhou Economic and Technological Development Branch of Quanzhou Yixing Electric Power Engineering Construction Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2023-07-04
Anticipated expiration: 2041-09-27
Also published as: CN113823522A

Abstract

The invention provides a gas relay which comprises a base, a frame, a first magnet, a second magnet, a reed pipe, a rotating shaft, a guide plate, a switching-on mechanism and a first reset spring, wherein the first magnet and the second magnet are respectively arranged at the front end and the rear end of the frame, the reed pipe is arranged at intervals with the frame, the rotating shaft is arranged transversely to the frame, the guide plate is arranged on the rotating shaft and positioned in the frame, the switching-on mechanism is arranged on the rotating shaft and positioned outside the frame, the first reset spring is arranged between the frame and the guide plate, the guide plate is obliquely arranged, the first reset spring enables the guide plate to be always positioned on a critical line between the first magnet and the second magnet when the guide plate is impacted by oil flow, and the switching-on mechanism acts along with the guide plate when the guide plate is attracted by the first magnet or the second magnet so as to switch off or switch on the reed pipe. The invention can keep the flow guide plate in a fault state, provides help for the follow-up investigation of the transformer fault, and can ensure that the flow guide plate is always positioned on a critical line even when being impacted by external environmental force, thereby avoiding sending error signals.

Description

Gas relay

Technical Field

The invention relates to a gas relay.

Background

The gas relay is a protection device used for a transformer, is arranged in a pipeline between an oil storage cabinet and an oil tank of the transformer, and is internally failed by the transformer to decompose transformer oil to generate gas or cause oil surge, the gas or oil surge enables a contact point of the gas relay to act, a designated control loop is connected, and a signal alarm is sent out in time or a protection element is started to automatically cut off the transformer.

In the gas relay in the prior art, the contact action is more instantaneous, such as a baffle, and after being pushed by oil flow, the reed switch is connected to send out a signal, the reed switch can be restored to the original position, namely the fault state cannot be maintained, so that the trouble is caused to the troubleshooting of the transformer fault by staff.

Disclosure of Invention

The invention provides a gas relay, which can keep a guide plate in a fault state, provides help for the follow-up investigation of the faults of a transformer, and can ensure that the guide plate is always positioned on a critical line even if being impacted by external environmental force, so that an error signal is prevented from being sent out.

The invention is realized by the following technical scheme:

the utility model provides a gas relay, the on-line screen storage device comprises a base, set up on the base and hollow frame, set up respectively at the first magnet and the second magnet of frame front end and rear end, with the reed pipe of frame interval arrangement, the axis of rotation of crossing the frame arrangement, set up in the axis of rotation and be located the guide plate of frame, set up in the axis of rotation and be located the switch-on mechanism in the frame outside and set up the first reset spring between frame and guide plate, the guide plate slope is arranged, first reset spring makes the guide plate be located the critical line between first magnet and the second magnet all the time when oil-free stream is strikeed, the guide plate is because of being strikeed by the oil stream and makes it by first magnet or second magnet when sucking, switch-on mechanism moves along with the guide plate, so that the reed pipe disconnection or switch-on.

Further, the frame comprises a U-shaped part with a downward opening and an L-shaped plate arranged between the U-shaped part and the base, the rotating shaft transversely penetrates through the lower end of the U-shaped part, the first reset spring is wound on the rotating shaft, one end of the first reset spring is arranged on the guide plate, and the other end of the first reset spring is arranged on the U-shaped part.

Further, the first magnet is arranged on the inner side of the top of the U-shaped part and extends horizontally backwards from the front end of the U-shaped part, a first vertical plate is arranged at the rear end of the U-shaped part, a first inclined plate which is inclined downwards is arranged on the inner side of the first vertical plate, and the second magnet is arranged on the first inclined plate.

Further, the polarity of the front end of the first magnet is opposite to that of the lower end of the second magnet.

Further, the switching mechanism comprises a switching plate with the lower end arranged on the rotating shaft and a third magnet arranged on the upper part of the switching plate to switch on or off the reed switch.

Furthermore, the reed switch is arranged at intervals with the frame through the S-shaped plate, and two ends of the S-shaped plate are respectively arranged on the outer side of the frame and the reed switch.

Further, one end of the first return spring is abutted against the lower part of the guide plate, and the other end of the first return spring is welded at the front end of the lower part of the U-shaped part.

Further, the first magnet and the second magnet are permanent magnets.

Further, still include manual canceling release mechanical system, manual canceling release mechanical system includes by the dwang of base lower extreme upwards wearing out the base, around establishing the second reset spring on the dwang, run through the dwang setting the dwang and set up at epaxial reset plate, the second reset spring lower extreme is provided with the ring, the reset lever passes the ring and arranges and can stir the reset plate, makes the reset plate drive the axis of rotation and rotates to make the guide plate reset.

The invention has the following beneficial effects:

1. according to the invention, the first magnet and the second magnet are respectively arranged at the front end and the rear end of the frame, when the inside of the transformer breaks down, the oil flow impacts the guide plate, so that the guide plate is attracted by the first magnet or the second magnet, the switching-on mechanism is driven to act, the reed switch is switched off or switched on, so that a fault signal is sent out, and the guide plate cannot be automatically reset after being attracted, so that the guide plate can be kept in a state of breaking down, and the help is provided for the follow-up investigation of the transformer fault; when the deflector does not have oil flow impact, under the effect of first reset spring, can be located the critical line between first magnet and the second magnet all the time, this critical line is the position that is determined according to mechanical analysis when gas relay structural design, as long as the deflector is located the critical line, just can send accurate signal when the trouble takes place, but in actual use, the position of deflector can deviate from the critical line because of the impact of some external environmental force (like the earthquake), and after deviating from the critical line, can take place when the condition that can't attract when needs to inhale, thereby send error signal, and first reset spring then can make the deflector reset to critical line position after the unexpected deviation, effectively avoid sending error signal.

2. According to the invention, the first magnet is horizontally arranged, the second magnet is obliquely arranged downwards, the two ends of the first magnet and the second magnet are provided with opposite magnetism, and the magnetism of the front end of the first magnet is opposite to that of the lower end of the second magnet, namely, the first magnet and the second magnet are arranged in a paramagnetic mode, so that the magnetic field stability can be enhanced, the anti-interference capability is improved, and an error signal is further prevented from being sent out.

Drawings

The invention is described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of the structure of the present invention (with the top cover removed).

Fig. 3 is a schematic view of the structure of the present invention (with the top cover and the base removed).

Fig. 4 is a schematic structural view of the first magnet, the second magnet and the baffle according to the present invention.

Fig. 5 is a schematic view of the structure of the present invention (showing a manual reset mechanism).

1, a base; 2. a top cover; 21. an oil flow passage; 22. an observation window; 3. a frame; 31. a U-shaped portion; 32. an L-shaped plate; 33. a first riser; 34. a first swash plate; 35. a second swash plate; 4. a first magnet; 5. a second magnet; 6. a reed pipe; 61. an S-shaped plate; 7. a rotating shaft; 8. a first return spring; 9. a deflector; 91. an impingement plate; 92. a through hole; 101. a connecting plate; 102. a third magnet; 111. a rotating lever; 112. a second return spring; 113. a reset lever; 114. and a reset plate.

Detailed Description

As shown in fig. 1 to 5, the gas relay includes a base 1, a top cover 2, a frame 3, a first magnet 4, a second magnet 5, two reed pipes 6, a rotating shaft 7, a deflector 9, two switching-on mechanisms, a first return spring 8, and a manual return mechanism. The top cover 2 is covered on the base 1, forms a closed space with the base 1, and is provided with an oil flow channel 21 and an observation window 22 which are communicated with the closed space.

The frame 3 is arranged on the base 1 and is positioned in a closed space, and specifically comprises a U-shaped part 31 with a downward opening and an L-shaped plate 32 arranged between the U-shaped part 31 and the base 1, the lower end of the L-shaped plate 32 is locked on the base 1 through bolts, the first magnet 4 and the second magnet 5 are respectively arranged at the front end and the rear end of the U-shaped part 31, the rotating shaft 7 transversely passes through the lower end of the U-shaped part 31, the guide plate 9 is arranged on the rotating shaft 7 and is positioned in the U-shaped part 31, two switching-on mechanisms are respectively arranged on the rotating shaft 7 and are positioned outside the U-shaped part 31, two reed pipes 6 are respectively arranged at intervals with the U-shaped part 31, the U-shaped part 31 is positioned between the two reed pipes 6, the first return spring 8 is arranged between the frame 3 and the guide plate 9 in an inclined way, the first return spring 8 enables the guide plate 9 to be always positioned on a critical line between the first magnet 4 and the second magnet 5 when the guide plate 9 is impacted by oil flow, and the guide plate 9 is enabled to be switched on or switched off by the guide plate 9 when the guide plate 9 is attracted by the first magnet 4 or the second magnet 5 due to oil flow.

In this embodiment, the first return spring 8 is wound around the rotation shaft 7, and one end thereof abuts against the lower portion of the deflector 9, and the other end thereof is welded to the front end of the lower portion of the U-shaped portion 31. The baffle 9 includes a rectangular plate having a lower end provided on the rotation shaft 7 and a second inclined plate 35 provided at an upper end of the rectangular plate and inclined rearward. The front end of the lower part of the U-shaped part 31 is also provided with an impact plate 91, the impact plate 91 is positioned in front of the guide plate 9, the impact plate 91 is provided with a through hole 92, and two ends of the impact plate 91 are respectively arranged on the rotating shaft 7. The oil flow impacts the impact plate 91, and the impact plate 91 drives the guide plate 9 to act.

In this embodiment, the first magnet 4 is disposed on the inner side of the top of the U-shaped portion 31 by a bolt, and extends horizontally from the front end of the U-shaped portion 31 to the rear end, the rear end of the U-shaped portion 31 is provided with a first vertical plate 33, the upper end of the first vertical plate 33 is provided with an upwardly inclined second inclined plate 35, the upper end of the second inclined plate 35 is provided with a downwardly inclined first inclined plate 34, the second magnet 5 is disposed on the first inclined plate 34 by a bolt, the first magnet 4 and the second magnet 5 are rectangular solids, the two ends of the first magnet 4 and the second magnet 5 have opposite polarities, and the polarities of the front end and the rear end of the first magnet 4 are respectively S-pole and N-pole, and the polarities of the upper end and the lower end of the second magnet 5 are respectively S-pole and N-pole, as in this embodiment.

In this embodiment, the two reed pipes 6 are respectively arranged at intervals with the U-shaped part 31 through two S-shaped plates 61, one end of the S-shaped plate 61 is locked on the outer side of the U-shaped part 31 through bolts, and the other end is locked with a sleeve sleeved on the reed pipe 6 through bolts.

The switch-on mechanism comprises a switch-on plate 101 with the lower end arranged on the rotating shaft 7 and a third magnet 102 arranged on the upper part of the switch-on plate 101, wherein the switch-on plate 101 acts along with the action of the guide plate 9, so that the position of the third magnet 102 is driven to change, and the reed switch 6 is switched on or off to send out corresponding signals.

The first magnet 4, the second magnet 5, and the third magnet 102 are permanent magnets.

After the guide plate 9 is attracted by the first magnet 4 or the second magnet 5, the guide plate cannot automatically reset, so that a manual reset mechanism is needed to manually reset, the manual reset mechanism comprises a rotating rod 111 penetrating out of the base 1 upwards from the lower end of the base 1, a second reset spring 112 wound on the rotating rod 111, a reset rod 113 penetrating through the rotating rod 111 and a reset plate 114 arranged on the rotating shaft 7, a circular ring is arranged at the lower end of the second reset spring 112, the reset rod 113 penetrates through the circular ring, when the reset plate 114 can be fluctuated and needs to reset, the rotating rod 111 is rotated to drive the reset rod 113 to rotate, the reset plate 114 can be fluctuated, the rotating shaft 7 is driven to rotate, the guide plate 9 is reset, then the rotating rod 111 is loosened, and the rotating rod 111 is reset under the action of the second reset spring 112.

The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, i.e., the invention is not to be limited to the details of the claims and the description, but rather is to cover all modifications which are within the scope of the invention.

Claims

1. A gas relay, characterized in that: the device comprises a base, a hollow frame, a first magnet, a second magnet, a reed pipe, a rotating shaft, a guide plate, a switching mechanism and a first reset spring, wherein the first magnet and the second magnet are arranged at the front end and the rear end of the frame respectively, the reed pipe is arranged at intervals with the frame, the rotating shaft is arranged transversely to the frame, the guide plate is arranged on the rotating shaft and positioned in the frame, the switching mechanism is arranged on the rotating shaft and positioned outside the frame, the first reset spring is arranged between the frame and the guide plate in an inclined mode, the first reset spring enables the guide plate to be always positioned on a critical line between the first magnet and the second magnet when oil-free flow impacts, and the switching mechanism acts along with the guide plate when the guide plate is attracted by the first magnet or the second magnet due to oil flow impacts, so that the reed pipe is switched off or on.

2. A gas relay according to claim 1, wherein: the frame comprises a U-shaped part with a downward opening and an L-shaped plate arranged between the U-shaped part and the base, the rotating shaft transversely penetrates through the lower end of the U-shaped part, the first reset spring is wound on the rotating shaft, one end of the first reset spring is arranged on the guide plate, and the other end of the first reset spring is arranged on the U-shaped part.

3. A gas relay according to claim 2, wherein: the first magnet is arranged on the inner side of the top of the U-shaped part and extends horizontally backwards from the front end of the U-shaped part, a first vertical plate is arranged at the rear end of the U-shaped part, a first inclined plate which is inclined downwards is arranged on the inner side of the first vertical plate, and the second magnet is arranged on the first inclined plate.

4. A gas relay according to claim 3, wherein: the polarity of the front end of the first magnet is opposite to that of the lower end of the second magnet.

5. A gas relay according to claim 1 or 2 or 3 or 4, characterized in that: the switching mechanism comprises a switching plate with the lower end arranged on the rotating shaft and a third magnet arranged on the upper part of the switching plate to switch on or off the reed switch.

6. A gas relay according to claim 1 or 2 or 3 or 4, characterized in that: the reed switch is arranged at intervals with the frame through an S-shaped plate, and two ends of the S-shaped plate are respectively arranged on the outer side of the frame and the reed switch.

7. A gas relay according to claim 2 or 3 or 4, characterized in that: one end of the first reset spring is abutted to the lower portion of the guide plate, and the other end of the first reset spring is welded to the front end of the lower portion of the U-shaped portion.

8. A gas relay according to claim 3 or 4, characterized in that: the first magnet and the second magnet are permanent magnets.

9. A gas relay according to claim 1 or 2 or 3 or 4, characterized in that: still include manual canceling release mechanical system, manual canceling release mechanical system includes the dwang of upwards wearing out the base by the base lower extreme, around establishing the second reset spring on the dwang, run through the dwang setting the reset lever and set up at epaxial reset plate, second reset spring lower extreme is provided with the ring, the reset lever passes the ring and arranges and can stir the reset plate, makes the reset plate drive the axis of rotation and rotates to make the guide plate reset.