Gas density relay with anti-vibration and compensation functions

Abstract

The utility model relates to a gas density relay with anti-vibration and compensation functions, which is characterized in that a gas charging connector charges gas in an electrical equipment insulation gas chamber into an inner cavity of a sealing shell, an inner cavity of a Bourdon tube is communicated with the inner cavity of the sealing shell through a Bourdon tube gas channel in a first base, a corrugated tube and a microswitch are further mounted in the sealing shell, and the sealing shell is provided with a first base and a second base. Compensation gas is sealed in the inner cavity of the corrugated pipe, so that the Bourdon pipe and the corrugated pipe do not need to be inflated through a capillary tube, the use of the capillary tube is avoided, the gas leakage risk is reduced, the gas leakage risk is low even in a vibration environment, and therefore the vibration resistance is good. In addition, the compensation gas filled in the corrugated pipe can correct and compensate deformation of the corrugated pipe, such as compensation of environment temperature, so that the density relay also has a compensation function.

Description

Technical Field

[0001] This utility model relates to a gas density relay with vibration resistance and compensation functions, belonging to the field of gas density monitoring technology. Background Technology

[0002] In the operation system of power equipment, the sulfur hexafluoride (SF6) gas density relay plays a crucial role, bearing the critical mission of real-time monitoring of the density of insulating gas. Its performance directly affects whether the power equipment can achieve safe, stable, and reliable operation. The display section of this density relay typically uses a C-tube (also known as a Baden tube) as the pressure-sensing element. The C-tube deforms with changes in gas pressure, thus visually displaying the gas density value. The contact section uses a detection bellows as the pressure-sensing element, capable of accurately detecting minute fluctuations in gas pressure, thereby triggering corresponding alarm and interlocking actions.

[0003] However, the gas connection between the Baden tube, bellows, and inflation connector mainly relies on capillary tubes. But capillary tubes have revealed significant drawbacks in practical applications. During assembly, improper operation by personnel or mechanical stress can easily cause capillary tubes to break. In field use, long-term vibration, frequent temperature changes, and other complex environmental factors can cause capillary tubes to gradually fatigue, eventually leading to breakage and gas leakage. Especially when the sulfur hexafluoride circuit breaker performs opening / closing operations, a powerful impact force is generated instantaneously. This impact force is transmitted through the equipment to the density relay, further exacerbating the damage to the capillary tube. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a gas density relay with anti-vibration and compensation functions, which has both anti-vibration and compensation functions and a low risk of gas leakage.

[0005] To achieve the above objectives, this utility model provides a gas density relay with vibration resistance and compensation functions. The gas density relay has a display chamber, in which a first base, a Baden tube, and a pointer mechanism are installed. The front end of the display chamber is an observation window, and the rear end of the display chamber is a sealed housing. The first base has a Baden tube air passage, one end of which is connected to the inner cavity of the Baden tube, and the other end is connected to the inner cavity of the sealed housing. An inflation connector for filling the inner cavity of the sealed housing is connected to the sealed housing. A bellows and a micro switch are also installed in the sealed housing. The inner cavity of the bellows is sealed with compensation gas. The bellows can deform according to the gas density change in the inner cavity of the sealed housing, thereby driving the micro switch to close or open.

[0006] Preferably, the rear end of the display chamber is sealed by an end cap, the end cap is provided with a connection hole, the first base has a first connector, the air inlet of the Baden tube is located at the end of the first connector, the sealing housing has a first connector, the first connector communicates with the inner cavity of the sealing housing, and the first connector passes through the connection hole and is inserted into the first connector.

[0007] More preferably, a sealing ring is provided between the first connector and the connecting hole, and between the first connector and the first connecting nozzle.

[0008] More preferably, the connection hole is located at the center of the end cap.

[0009] More preferably, the sealing housing is fixed to the end cap, and the top of the sealing housing is provided with a maintenance port, on which a removable sealing cap is provided.

[0010] More preferably, a protective shell is provided on the outside of the sealed housing.

[0011] Preferably, a second base is installed at the bottom of the sealing shell, and the inflation connector is connected to the second base. The inflation connector has a central air passage, and the second base has a connecting air passage that connects the central air passage of the inflation connector to the inner cavity of the sealing shell.

[0012] Preferably, the display chamber is filled with standard atmospheric pressure gas or anti-vibration oil.

[0013] Preferably, the rear end of the sealed housing is further provided with a smart control chamber, in which a pressure sensor is provided. The sealed housing has a second connecting nozzle, and the pressure sensor has a second connector. The air inlet of the pressure sensor is located at the end of the second connector, and the second connector is inserted into the second connecting nozzle.

[0014] More preferably, a sealing ring is provided between the end face of the second connector and the bottom face of the second connector nozzle.

[0015] More preferably, the intelligent control chamber is also equipped with an intelligent microprocessor for receiving and processing pressure sensor monitoring data, and a communication module for sending communication signals to a remote host computer according to the instructions of the intelligent microprocessor.

[0016] As described above, in the gas density relay with vibration resistance and compensation functions disclosed in this utility model, the gas filling connector fills the inner cavity of the sealed housing with gas from the insulating gas chamber of the electrical equipment. The inner cavity of the Baden tube is connected to the inner cavity of the sealed housing through the Baden tube gas passage in the first base. Furthermore, a bellows and a micro switch are installed in the sealed housing. The inner cavity of the bellows is sealed with compensation gas. In this way, neither the Baden tube nor the bellows needs to be filled with gas using a capillary tube, thus avoiding the use of a capillary tube and reducing the risk of gas leakage. Even in a vibration environment, the risk of gas leakage is low, thus exhibiting good vibration resistance. The compensation gas filled in the bellows can correct and compensate for the deformation of the bellows, such as compensating for ambient temperature. Therefore, the density relay also has a compensation function. Attached Figure Description

[0017] Figure 1 The image shown is a cross-sectional view of a gas density relay with vibration resistance and compensation functions according to this utility model.

[0018] Figure 2 The view shown is a three-dimensional sectional view of the chamber and the parts installed therein.

[0019] Figure 3 The diagram shows the module connections for the intelligent control component.

[0020] Component designation explanation

[0021] 1 Baden tube

[0022] 2. Pointer mechanism

[0023] 3 Display chamber

[0024] 4. Observation Window

[0025] 5. End caps

[0026] 6 Connecting holes

[0027] 7. Corrugated pipe

[0028] 8. Micro switch

[0029] 9. Sealed housing

[0030] 10 First connecting nozzle

[0031] 11 Second connecting nozzle

[0032] 12 First Pyramid

[0033] 13 First connector

[0034] 14 Baden airway

[0035] 15 Second base

[0036] 16 Connecting the airway

[0037] 17. Inflation connector

[0038] 18 Central airways

[0039] 19 Maintenance Port

[0040] 20 Sealing cap

[0041] 21 Protective Case

[0042] 22 Intelligent Control Chambers

[0043] 23 Intelligent Control Components

[0044] 24 Pressure Sensors

[0045] 25 Second connector

[0046] 26 Communication Module

[0047] 27 Intelligent Microprocessors

[0048] 28 Power Module Detailed Implementation

[0049] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0050] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0051] Please refer to Figure 1 and Figure 2This utility model provides a gas density relay with anti-vibration and compensation functions. The gas density relay has a display chamber 3, in which a first base 12, a Baden tube 1, and a pointer mechanism 2 are installed. The front end of the display chamber 3 is an observation window 4, and the rear end of the display chamber 3 is a sealing shell 9. The first base 12 is provided with a Baden tube air passage 14. One end of the Baden tube air passage 14 is connected to the inner cavity of the Baden tube 1, and the other end is connected to the inner cavity of the sealing shell 9. An inflation connector 17 for filling the inner cavity of the sealing shell 9 is connected to the sealing shell 9. A bellows 7 and a micro switch 8 are also installed in the sealing shell 9. The inner cavity of the bellows 7 is sealed with compensation gas. The bellows 7 can deform according to the gas density change in the inner cavity of the sealing shell 9, thereby driving the micro switch 8 to close or open.

[0052] like Figure 1 As shown, a second base 15 is installed at the bottom of the sealed housing 9, and an inflation connector 17 is connected to the second base 15. The inflation connector 17 has a central air passage 18, and the second base 15 has a connecting air passage 16, which connects the central air passage 18 of the inflation connector 17 to the inner cavity of the sealed housing 9. Thus, gas from the electrical equipment insulation chamber can be injected into the inner cavity of the sealed housing 9 through the inflation connector 17, making the gas density in the inner cavity of the sealed housing 9 the same as the gas density in the electrical equipment insulation chamber. The bellows 7 installed in the sealed housing 9 can deform according to changes in the gas density in the inner cavity of the sealed housing 9. When the gas density change causes the bellows 7 to deform, it will drive the microswitch 8 to close or open, thereby realizing the detection and corresponding control functions of gas density change. The compensation gas injected into the bellows 7 can correct and compensate for the deformation of the bellows 7, such as compensating for the influence of ambient temperature changes on the deformation of the bellows 7, improving the accuracy of gas density detection. To facilitate observation of gas density values, the front end of the display chamber 3 is equipped with an observation window 4, allowing operators to directly observe the displayed gas density values. The rear end of the display chamber 3 is equipped with a sealing housing 9 for connection and sealing with other components.

[0053] In this utility model, a gas density relay with vibration resistance and compensation functions is provided. The gas filling connector 17 fills the inner cavity of the sealing housing 9 with gas from the electrical equipment insulation chamber. The inner cavity of the Baden tube 1 is connected to the inner cavity of the sealing housing 9 through the Baden tube gas passage 14 in the first base 12. Furthermore, a bellows 7 and a micro switch 8 are installed in the sealing housing 9. The inner cavity of the bellows 7 is sealed with compensation gas. In this way, neither the Baden tube 1 nor the bellows 7 needs to be filled with gas using a capillary tube, thus avoiding the use of a capillary tube and reducing the risk of gas leakage. Even in a vibration environment, the risk of gas leakage is low, so it has good vibration resistance. The compensation gas filled in the bellows 7 can correct and compensate for the deformation of the bellows 7, such as compensating for the ambient temperature. Therefore, the density relay also has a compensation function.

[0054] The operation of this gas density relay with vibration resistance and compensation functions is as follows: When the electrical equipment is running, gas from the insulating gas chamber of the electrical equipment is injected into the inner cavity of the sealed housing 9 through the gas filling connector 17. The change in gas density in the inner cavity of the sealed housing 9 simultaneously affects the Baden tube 1 and the bellows 7. The Baden tube 1 deforms according to the gas pressure change, and the gas density value is displayed intuitively through the pointer mechanism 2. The pointer reading can be observed through the observation window 4. The bellows 7 deforms according to the gas density change in the inner cavity of the sealed housing 9, driving the micro switch 8 to close or open, realizing the detection and control of gas density changes. At the same time, the pressure sensor 24 monitors the pressure data in the inner cavity of the sealed housing 9 in real time. A temperature sensor can also be set to monitor the gas temperature data in the gas density relay. The intelligent microprocessor 27 processes and analyzes these data, corrects and compensates the gas density measurement results, and improves the measurement accuracy. The communication module 26 is used to transmit data to a remote host computer. When an abnormal situation occurs, the communication module 26 sends a communication signal to the remote host computer to remind the operator to handle the situation.

[0055] like Figure 1 As shown, to ensure that display chamber 3 is an independent sealed chamber, and to seal display chamber 3, an end cap 5 is provided at the rear end of display chamber 3. The rear end of display chamber 3 is sealed by end cap 5. To allow insulating gas from electrical equipment to be introduced into the inner cavity of Baden tube 1 in display chamber 3, such as... Figure 1 As shown, the end cap 5 has a connecting hole 6, the first base 12 has a first connector 13, the air inlet of the Baden tube air passage 14 is located at the end of the first connector 13, and the sealing housing 9 has a first connecting nozzle 10, which communicates with the inner cavity of the sealing housing 9. The first connector 13 passes through the connecting hole 6 and is inserted into the first connecting nozzle 10. In this way, the insulating gas entering the inner cavity of the sealing housing 9 from the inflation connector 17 can enter the Baden tube 1 through the first connecting nozzle 10 and the Baden tube air passage 14. To ensure a good seal between the first connector 13 and the connecting hole 6, and between the first connector 13 and the first connecting nozzle 10, sealing rings are provided between the first connector 13 and the connecting hole 6, and between the first connector 13 and the first connecting nozzle 10. This prevents gas from leaking through the gaps between the first connector 13 and the connecting hole 6, and between the first connecting nozzle 10. As a preferred embodiment, the connecting hole 6 is located at the center of the end cap 5, which facilitates the layout coordination of the parts.

[0056] like Figure 1As shown, the sealing housing 9 is fixed to the end cover 5. The sealing housing 9 can be fixed to the end cover 5 via an adapter plate. A maintenance port 19 is provided on the top of the sealing housing 9, and a removable sealing cover 20 is provided on the maintenance port 19. When maintenance or repair of the internal components of the sealing housing 9 is required, the sealing cover 20 can be opened for convenient operation. A protective shell 21 is provided on the outside of the sealing housing 9. Preferably, the protective shell 21 is sealed to the end cover 5, forming a relatively sealed cavity. The protective shell 21 provides additional protection for the sealing housing 9, reducing the impact of external environmental factors on the internal components of the sealing housing 9, and further improving the stability and reliability of the gas density relay.

[0057] To improve the measurement accuracy of the density relay, the display chamber 3 can be filled with standard atmospheric pressure gas or anti-vibration oil as needed. When anti-vibration oil is filled, the anti-vibration performance of the gas density relay can be further enhanced, reducing the impact of external vibration on the Baden tube 1 and the pointer mechanism 2, and ensuring the accuracy of the measurement.

[0058] To improve the intelligent performance of density relays, such as Figure 1 As shown, the rear end of the sealed housing 9 is also provided with an intelligent control chamber 22, in which a pressure sensor 24 is installed. The sealed housing 9 has a second connecting nozzle 11, and the pressure sensor 24 has a second connecting head 25. The air inlet of the pressure sensor 24 is located at the end of the second connecting head 25, which is inserted into the second connecting nozzle 11. The pressure sensor 24 can monitor the gas pressure entering its air inlet. To ensure a sealing effect, a sealing ring is provided between the end face of the second connecting head 25 and the bottom face of the second connecting nozzle 11. In addition to the pressure sensor 24, the intelligent control component 23 in the intelligent control chamber 22 also includes an intelligent microprocessor 27, a power module 28, and a communication module 26. The intelligent microprocessor 27 receives and processes the monitoring data from the pressure sensor 24. The communication module 26 sends communication signals to a remote host computer according to the instructions of the intelligent microprocessor 27. The power module 28 supplies power to the electrical components of the intelligent control component 23. The pressure sensor 24 monitors the pressure data in the cavity of the sealed housing 9 in real time and transmits the data to the intelligent microprocessor 27. The intelligent microprocessor 27 processes and analyzes the data, and determines whether the gas density is normal according to the preset algorithm and rules. If an abnormality occurs, the intelligent microprocessor 27 sends a communication signal to the remote host computer through the communication module 26 so that the operator can understand the operating status of the gas density relay in a timely manner and take corresponding measures to deal with it.

[0059] Based on the technical solution of the above specific embodiments, the gas density relay of this utility model with vibration resistance and compensation functions connects the components that need to be energized with gas through the gas channel design in the base, avoiding the use of capillary tubes for gas filling, reducing the risk of gas leakage, and exhibiting good vibration resistance. Simultaneously, the compensation gas filled in the bellows 7 can correct and compensate for the deformation of the bellows 7, improving the accuracy of gas density detection. Furthermore, the intelligent control chamber 22 enables real-time monitoring and remote communication of the gas density relay's operating status, providing a reliable guarantee for the safe and stable operation of power equipment.

[0060] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0061] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A gas density relay with vibration resistance and compensation functions, the gas density relay having a display chamber, wherein a first base, a Baden tube, and a pointer mechanism are installed in the display chamber, characterized in that: The front end of the display chamber is an observation window, and the rear end of the display chamber is equipped with a sealed housing. The first base is provided with a Baden tube air passage. One end of the Baden tube air passage is connected to the inner cavity of the Baden tube, and the other end is connected to the inner cavity of the sealed housing. An inflation connector for filling the inner cavity of the sealed housing is connected to the sealed housing. A bellows and a micro switch are also installed in the sealed housing. The inner cavity of the bellows is sealed with compensating gas. The bellows can deform according to the change in gas density in the inner cavity of the sealed housing, thereby driving the micro switch to close or open.

2. The gas density relay with anti-vibration and compensation functions according to claim 1, characterized in that: The rear end of the display chamber is sealed by an end cap, which has a connection hole. The first base has a first connector, and the air inlet of the Baden tube is located at the end of the first connector. The sealing housing has a first connector, which communicates with the inner cavity of the sealing housing. The first connector passes through the connection hole and is inserted into the first connector.

3. The gas density relay with anti-vibration and compensation functions according to claim 2, characterized in that: A sealing ring is provided between the first connector and the connecting hole, and between the first connector and the first connecting nozzle.

4. The gas density relay with anti-vibration and compensation functions according to claim 2, characterized in that: The connection hole is located at the center of the end cap.

5. The gas density relay with anti-vibration and compensation functions according to claim 2, characterized in that: The sealing housing is fixed to the end cap, and the top of the sealing housing is provided with a maintenance port, which is provided with a removable sealing cap.

6. The gas density relay with anti-vibration and compensation functions according to claim 2, characterized in that: The outer side of the sealed housing is provided with a protective shell.

7. The gas density relay with anti-vibration and compensation functions according to claim 1, characterized in that: A second base is installed at the bottom of the sealed housing, and the inflation connector is connected to the second base. The inflation connector has a central air passage, and the second base has a connecting air passage that connects the central air passage of the inflation connector to the inner cavity of the sealed housing.

8. The gas density relay with anti-vibration and compensation functions according to claim 1, characterized in that: The rear end of the sealed housing is also provided with an intelligent control chamber, in which a pressure sensor is provided. The sealed housing has a second connecting nozzle, and the pressure sensor has a second connector. The air inlet of the pressure sensor is located at the end of the second connector, and the second connector is inserted into the second connecting nozzle.

9. The gas density relay with anti-vibration and compensation functions according to claim 8, characterized in that: A sealing ring is provided between the end face of the second connector and the bottom face of the second connector nozzle.

10. The gas density relay with anti-vibration and compensation functions according to claim 8, characterized in that: The intelligent control chamber is also equipped with an intelligent microprocessor for receiving and processing pressure sensor monitoring data, and a communication module for sending communication signals to a remote host computer according to the instructions of the intelligent microprocessor.

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