A light gas relay device

Abstract

The present application discloses a light gas relay device, comprising: a relay gas chamber, a gas composition analyzer, and a light gas assembly; the light gas assembly is disposed inside the relay gas chamber and is used for closing the gas analysis trigger contact and the trip contact of the relay gas chamber when the gas in the relay gas chamber increases and causes the oil level to drop; the gas composition analyzer is disposed on the upper surface of the relay gas chamber and is used for performing gas analysis when the gas analysis trigger contact is closed. By having different actions of the light gas contacts at different degrees of gas release amounts, the present application solves the technical problem in the prior art that operation and maintenance personnel often cannot accurately analyze the fault gas components, thereby detecting the developing fault defects inside the main transformer, and there is no obvious external characteristic quantity reaction for the development of the internal fault of the main transformer body, so it is difficult to discover problems in a timely manner.

Description

Technical Field

[0001] This application relates to the technical field of gas relays, and particularly to a light gas relay device. Background Art

[0002] Existing gas relays operate when internal faults in a transformer cause oil or insulating materials to decompose, generating gas or causing oil flow surges. This makes the contacts of the gas relay operate, sending an alarm signal (light gas) or automatically disconnecting the transformer (heavy gas). Light gas mainly reflects the decomposition of oil or insulating materials when there are operating or minor faults (such as overloading and heating, local heating of the iron core, and heating of the oil tank caused by leakage flux). The gas rises into the gas collection chamber of the gas relay, causing the oil level to slowly drop due to air pressure. The relay float or open cup drops with the oil level, closing the light gas reed contacts to send a signal. Further drops in the oil level or an increase in oil or gas flow will cause the heavy gas to operate. Heavy gas mainly reflects serious faults such as casing grounding and inter-turn short circuits inside the transformer. A large amount of gas is quickly generated, pushing the oil flow to impact the baffle. The magnet on the baffle attracts the heavy gas reed contacts to conduct and trip.

[0003] The general practice in on-site operation is that after the light gas operates and sends an alarm signal, staff will be arranged to go to the site to confirm the actual situation of the main transformer body (including appearance abnormalities, gas leakage, abnormal sounds, whether the gas in the light gas chamber is flammable, etc.). Then, based on the actual on-site situation, professional technical personnel will be reported to confirm whether to cut off the power for relevant inspections (including gas analysis, relevant tests on the main transformer, inspection of the gas relay, inspection of relevant circuits, etc.), and then determine whether there is an internal fault in the main transformer. Existing gas relays generally send an alarm signal through a single light gas operation, reminding operation and maintenance personnel to conduct on-site inspections of various parts of the transformer for abnormalities and simultaneously check the gas components that cause the light gas to operate. During this process, the arrival time of personnel is uncertain. After arrival, due to the limitations of existing technical levels, operation and maintenance personnel often cannot accurately analyze the fault gas components, thus detecting the developing fault defects inside the main transformer. There is no obvious external characteristic quantity reaction to the development of internal faults in the main transformer body, so it is difficult to discover problems in a timely manner. Summary of the Invention

[0004] This application provides a light gas relay device, which solves the technical problem that in the prior art, operation and maintenance personnel often cannot accurately analyze the fault gas components, thus detecting the developing fault defects inside the main transformer. There is no obvious external characteristic quantity reaction to the development of internal faults in the main transformer body, so it is difficult to discover problems in a timely manner.

[0005] This application provides a light gas relay device, including:

[0006] A relay gas chamber, a gas component analyzer, and a light gas assembly;

[0007] The light gas component is built into the relay gas chamber and is used to connect the gas analysis trigger contact and the trip contact of the relay gas chamber when the gas in the relay gas chamber increases and causes the oil level to drop;

[0008] The gas composition analyzer is installed on the upper surface of the relay gas chamber and is used to perform gas analysis when the gas analysis trigger contact is connected.

[0009] Optionally, the gas analysis trigger contact and the trip contact are symmetrically arranged with the center line of the light gas component as the axis of symmetry.

[0010] Optionally, a contact fixing component is further included, which is used to fix the gas analysis trigger contact or the trip contact to the relay gas chamber.

[0011] Optionally, the material of the contact fixing component is an insulating material.

[0012] Optionally, the gas composition analyzer is used to control the light gas relay device to connect the second trip contact circuit, and the first trip contact is used to send an alarm signal and start the gas analyzer to work.

[0013] Optionally, the light gas component includes a light gas float, and the light gas float is a vacuum structure.

[0014] Optionally, the light gas float is equipped with 2 or 4 auxiliary floats with adjustable heights, and the light gas action value can be adjusted by adjusting the heights of the auxiliary floats.

[0015] Optionally, a transverse fixing shaft is further included, and both ends of the transverse fixing shaft are respectively fixed to two sides of the relay chamber.

[0016] Optionally, a fixing shaft is further included, one end of the fixing shaft is fixed to the midpoint of the transverse fixing shaft, is perpendicular to the transverse fixing shaft, and the other end is connected to the light gas component.

[0017] Optionally, the light gas component includes a float connecting rod, and the midpoint of the float connecting rod is vertically connected to one end of the fixing shaft.

[0018] To solve the defects existing in the prior art, the present application provides a light gas relay device, including:

[0019] A relay gas chamber, a gas composition analyzer and a light gas component;

[0020] The light gas component is built into the relay gas chamber and is used to connect the gas analysis trigger contact and the trip contact of the relay gas chamber when the gas in the relay gas chamber increases and causes the oil level to drop;

[0021] The gas composition analyzer is installed on the upper surface of the relay gas chamber and is used to perform gas analysis when the gas analysis trigger contact is closed.

[0022] A light gas relay device provided by the present application fixes a gas composition analyzer on the upper surface of the relay gas chamber. When the insulating oil level in the relay gas chamber drops due to the increase in the amount of gas inside the transformer, and the light gas assembly drops accordingly to close the gas analysis trigger contact and the trip contact, the gas composition analyzer is activated to start monitoring the gas composition and initiate an outlet trip to give corresponding alarms. By having different actions for the light gas contacts at different degrees of gas release amounts, the present application solves the technical problem in the prior art that operation and maintenance personnel often cannot accurately analyze the fault gas composition, thus detecting the developing fault defects inside the main transformer. There is no obvious external characteristic quantity reaction for the development of faults inside the main transformer body, so it is difficult to discover problems in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a light gas relay device provided by the present application;

[0024] Figure 2 is a schematic structural diagram of the light gas assembly of a light gas relay device provided by the present application Figure 1 ;

[0025] Figure 3 is a schematic structural diagram of the light gas assembly of a light gas relay device provided by the present application Figure 2 ;

[0026] Reference numerals: relay body 1; relay gas chamber 2; pipeline 3; fixed shaft 4; contact fixing assembly 5; light gas contact 6; light gas assembly 7; position adjustment screw 71; light gas float 72; bearing connecting piece 73; float connecting rod 74; bar-shaped permanent magnet 75; auxiliary float 76; auxiliary float connecting rod 77; gas composition analyzer 8; horizontal fixed shaft 9. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0028] Since existing gas relays generally send out warning signals through single light gas operation to remind operation and maintenance personnel to check whether the transformer is abnormal and to check the gas components triggering the light gas operation at the same time. However, during the whole process, the time for operation and maintenance personnel to reach the warning site is uncertain, and after arrival, due to the limitations of existing technologies and the fact that there are no obvious external characteristic quantities indicating the faults caused by defects inside the main transformer body, it is difficult for operation and maintenance personnel to detect the defects inside the main transformer body.

[0029] After the existing gas relay has a single light gas operation, even if the gas inside the relay increases subsequently, the light gas relay cannot operate again to indicate the change in gas volume. That is to say, when there is a developing fault inside the main transformer, when the light gas of the existing gas relay operates, if the deflation and reset operations are not performed, even if gas is continuously released, the light gas will not operate again. Therefore, this application is set to operate and trip the circuit breakers on each side of the transformer at the initial stage of the development of this fault, so that when the transformer continuously releases gas in a short period of time, the gas relay can make different responses in stages according to different gas release amounts.

[0030] During the operation of the existing main transformer, due to problems with oil pipelines, structures, or other situations that cause slow gas release or an increase in gas release amount, the light gas relay of the main transformer operates and false warning signals are sent. However, in this case, the time interval between the first light gas operation and the second light gas operation of the light gas relay triggered by the slowly increasing gas is relatively long. Therefore, in this application, the time interval between the first light gas operation and the second light gas operation of the light gas relay can be adjusted to prevent the phenomenon of false warning signals.

[0031] Within a certain period of time after the main transformer is commissioned, overhauled, or after oil filtration and put into operation, there may be trapped gas gradually released from the transformer. When the amount of gas released by these trapped gases reaches the threshold of light gas operation and triggers the corresponding light gas operation, this situation is different from the time length of the light gas operation triggered by the decomposition gas generated when a fault occurs during the commissioning, overhaul, or operation after oil filtration of the main transformer. However, the logic of the light gas operation set in the existing technology does not consider the time length of the light gas operation when the main transformer is commissioned, overhauled, or put into operation after oil filtration, resulting in difficulty in distinguishing whether the light gas operation is triggered by trapped gas or fault decomposition gas. Therefore, both trapped gas and fault decomposition gas will trigger an alarm. This application also makes corresponding adjustments for this phenomenon.

[0032] The present application provides a light gas relay device, which solves the technical problem in the prior art that operation and maintenance personnel are often unable to accurately analyze the fault gas composition and thus discover the internal development fault defects of the main transformer, and the development of the internal fault of the main transformer body has no obvious external characteristic quantity response, so it is difficult to discover the problem in time.

[0033] For easier understanding, see Figures 1 - 3 .

[0034] The embodiment of the present application provides a light gas relay device, comprising:

[0035] Relay gas chamber, gas composition analyzer 8 and light gas assembly 7;

[0036] The light gas component 7 is built into the relay gas chamber, and is used to connect the relay gas chamber gas analysis trigger contact and the trip contact when the gas in the relay gas chamber increases and causes the oil level to drop;

[0037] The gas component analyzer 8 is installed on the upper surface of the relay gas chamber and is used to perform gas analysis when the gas analysis trigger contact is connected.

[0038] It should be noted that the present application sets a gas component analyzer 8 in the light gas relay, and the gas component analyzer 8 has high accuracy and strong anti-interference ability. When the gas in the relay gas chamber of the light gas relay device gradually increases, the oil level in the relay gas chamber decreases accordingly, thereby driving the light gas component 7 originally floating on the oil surface to decrease. When the oil level drops to the preset light gas action value, the light gas component 7 at this time drops to a level sufficient to connect the gas analysis trigger contact and the trip contact, and connect the two light gas contacts 6. When the gas analysis trigger contact is connected, the gas component analyzer 8 starts the first gas data monitoring, detects the gas composition data at this time and stores it, and continuously monitors and obtains the gas composition data until the monitoring time reaches the preset monitoring time. When the preset monitoring time is met, the gas component analyzer 8 automatically analyzes the gas sufficient data at the start of the monitoring time and the gas composition data at the end time, and judges the consistency between the two. When the similarity meets the preset similarity, the auxiliary contact outlet trip of the light gas relay can be started, and the alarm is started. Among them, the relay gas chamber of the present application is a square structure. A pipeline 3 is provided at the bottom of the relay air chamber, and the pipeline 3 is provided with two pipeline 3 connection ends, which are used to connect the upper part of the transformer with the pipeline 3 of the oil pillow. And the two ends of the pipeline 3 are both circular, and the inner and outer diameters are matched with the transformer.

[0039] Furthermore, the gas analysis trigger contact and the trip contact are symmetrically arranged with the center line of the light gas component 7 as the symmetry axis.

[0040] It should be noted that if Figure 1As shown, two gas relay contacts 6 are symmetrically arranged with the center line of the gas relay assembly 7 as the axis of symmetry, and they are axially symmetrically set.

[0041] Furthermore, it also includes a contact fixing assembly 5 for fixing the gas analysis trigger contact or the trip contact to the relay gas chamber.

[0042] It should be noted that the present application is provided with a contact fixing assembly 5, which can be made of insulating material. The upper part is fixed to the relay body 1, and the center position is fixed on the fixed shaft 4. One end of the fixed shaft 4 is connected to the gas relay assembly 7. Gas composition analysis trigger contacts and trip contacts are respectively arranged at both ends of the fixing assembly. In particular, the relay body 1 can be a conductive metal structure.

[0043] Furthermore, the material of the contact fixing assembly 5 is insulating material.

[0044] It should be noted that the contact fixing assembly 5 provided in the present application can be made of insulating material.

[0045] Furthermore, the gas composition analyzer 8 is used to control the light gas relay device to connect the second trip contact circuit, and the first trip contact is used to send an alarm signal and start the gas composition analyzer to work.

[0046] It should be noted that the gas composition analyzer 8 is used to control the light gas relay device to connect the second trip contact, and both the first trip contact and the second trip contact are used to realize the light gas protection trip output.

[0047] Furthermore, the gas relay assembly 7 includes a gas relay float 72, and the gas relay float 72 is a vacuum structure.

[0048] It should be noted that as Figure 2 shown, strip permanent magnets 75 are respectively fixed at both ends of the gas relay assembly 7. When it approaches the gas relay contact 6, it will be adsorbed on the gas relay contact 6 under the action of magnetic force to connect the gas relay contact 6. A gas relay float 72 is arranged at the center position of the gas relay assembly 7, and its interior can be a vacuum structure to make its specific gravity less than that of the insulating oil inside the transformer, so that it can float on the oil surface. The gas relay float 72 as a whole can also be made of lightweight material, and the specific gravity of the lightweight material used is less than that of the transformer insulating oil, which can make the specific gravity of the gas relay float 72 less than that of the insulating oil inside the transformer, so that it can float on the oil surface.

[0049] Furthermore, it also includes a transverse fixed shaft 9. Both ends of the transverse fixed shaft 9 are respectively fixed to two sides of the relay gas chamber.

[0050] It should be noted that both ends of the transverse fixed shaft 9 are respectively fixed on two sides of the relay gas chamber, and the transverse fixed shaft 9 can be inserted into or removed from the inside of the relay gas chamber through its two ends.

[0051] Further, it further includes a fixed shaft 4. One end of the fixed shaft 4 is fixed to the midpoint of the transverse fixed shaft 9 and is perpendicular to the transverse fixed shaft 9, and the other end is connected to the light gas assembly 7.

[0052] It should be noted that a bearing connecting member 73 is provided at one end of the fixed shaft 4. Through the bearing connecting member 73, it is movably connected to the light gas assembly 7, and the light gas assembly 7 can move up and down along the bearing.

[0053] Further, the light gas assembly 7 includes a float connecting rod 74, and the float connecting rods 74 are symmetrically arranged on the light gas float 72.

[0054] It should be noted that the light gas assembly 7 is provided with float connecting rods 74, and the float connecting rods 74 are symmetrically arranged at both ends of the light gas float 72, and auxiliary floats 76 are arranged in the middle of both. The inner diameters of the two auxiliary floats 76 are both matched with the outer diameter of the float connecting rod 74, and their materials are the same as those of the light gas float 72, and they are of a cylindrical structure. By adjusting the height difference between the auxiliary floats 76 and the light gas float 72 from the ground, the adjustment of the light gas action value can be realized. Among them, the float connecting rod 74 is used in cooperation with the position adjustment screw 71 to adjust the relative position of the auxiliary float 76 on the float connecting rod 74. The auxiliary float connecting rod 77 is of a cylindrical structure, and a thread is provided on the outer ring and can be used in cooperation with the position adjustment screw.

[0055] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A light gas relay device, characterized in that, Comprising: A relay gas chamber, a gas composition analyzer, and a light gas component; The light gas component is built into the relay gas chamber and is used to connect the gas analysis trigger contact and the trip contact of the relay gas chamber when the gas in the relay gas chamber increases and causes the oil level to drop; The gas analysis trigger contact and the trip contact are symmetrically arranged with the center line of the light gas component as the axis of symmetry; the gas composition analyzer is installed on the upper surface of the relay gas chamber and is used to perform gas analysis when the gas analysis trigger contact is connected, including: When the gas analysis trigger contact is connected, the gas composition analyzer starts the first gas data monitoring, detects and stores the gas composition data at this time, and continuously monitors and obtains the gas composition data until the monitoring time reaches the preset monitoring time; When the preset monitoring time is met, the gas composition analyzer automatically analyzes the gas composition data at the start monitoring moment and the end monitoring moment, judges the consistency of the two, and when the similarity meets the preset similarity, the auxiliary contact outlet trip of the light gas relay can be started and the alarm can be started.

2. The light gas relay device according to claim 1, characterized in that, It further includes a contact fixing component for fixing the gas analysis trigger contact or the trip contact to the relay gas chamber.

3. The light gas relay device according to claim 2, wherein, The material of the contact fixing component is an insulating material.

4. A light gas relay device according to claim 1, characterized in that, The gas composition analyzer is used to control the light gas relay device to connect the second trip contact circuit, and the first trip contact is used to send an alarm signal and start the gas analyzer to work.

5. A light gas relay device according to claim 1, characterized in that, The light gas component includes a light gas float, and the light gas float is a vacuum structure.

6. A light gas relay device according to claim 5, characterized in that, The light gas float is equipped with 2 or 4 auxiliary floats with adjustable heights, and the light gas action value can be adjusted by adjusting the heights of the auxiliary floats.

7. A light gas relay device according to claim 1, characterized in that, It further includes a horizontal fixing shaft, and both ends of the horizontal fixing shaft are respectively fixed to two sides of the relay gas chamber.

8. A light gas relay device according to claim 1, characterized in that, It further includes a fixing shaft, one end of the fixing shaft is fixed to the midpoint of the horizontal fixing shaft, is perpendicular to the horizontal fixing shaft, and the other end is connected to the light gas component.

9. A light gas relay device according to claim 1, characterized in that, The light gas component includes a float connecting rod, and the midpoint of the float connecting rod is vertically connected to one end of the fixing shaft.

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