Substation Gas Parameter Composite Detection System

Abstract

This utility model relates to the field of gas detection technology, and in particular to a composite gas parameter detection system for substations. It includes a central controller and detection units arranged in the substation, each with a housing. The detection unit is equipped with an oxygen concentration sensor, a sulfur hexafluoride (SF6) sensor, and a humidity sensor. The housing of the detection unit has three compartments, each containing one of the three sensors. Each compartment has an outlet and an inlet. The system also includes a labyrinthine gas path system with three outlets and one inlet, the three outlets connected to the inlets of the three compartments. A large-particle filter is installed near the outlet of the labyrinthine gas path system. The detection unit also includes a centrifugal pump with an outlet connected to the inlet of the labyrinthine gas path system. The compartments improve measurement accuracy and prevent large particles or fibers from entering.

Description

Technical Field

[0001] This utility model relates to the field of substation technology, and in particular to a substation gas detection system. Background Technology

[0002] With the continuous expansion and increasing complexity of power systems, the operational safety of equipment within substations has become critical. Substations contain numerous electrical devices, which may experience gas leaks during operation. Therefore, it is necessary to monitor gas parameters within substations. A composite detection system can monitor multiple gas indicators in real time, detecting potential hazards early and effectively preventing accidents such as fires and explosions. However, the composite detection system requires air sampling during operation, which generates vibrations. These vibrations can lead to misreadings and affect the accuracy of the detection data.

[0003] When performing composite parameter detection, multiple detection sensors are required. Sensors such as oxygen concentration sensors and sulfur hexafluoride sensors may undergo chemical reactions during operation, affecting the measurement accuracy. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of this section, the abstract and the title of this utility model. Such simplifications or omissions shall not be used to limit the scope of this utility model.

[0005] In view of the problems existing in the prior art, the present invention is proposed.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution;

[0007] A substation gas parameter composite detection system includes a central controller and detection units arranged in the substation. The central controller is communicatively connected to the detection units, and the detection units also include a housing.

[0008] The detection unit is equipped with an oxygen concentration sensor, a sulfur hexafluoride sensor, and a humidity sensor;

[0009] The housing of the detection unit is provided with three compartments, which respectively contain the oxygen concentration sensor, the sulfur hexafluoride sensor and the humidity sensor;

[0010] All three warehouses have both an exit and an entrance;

[0011] It also includes a labyrinthine air system, which has three air outlets and one air inlet, with the three air outlets connected to the inlets of the three compartments respectively.

[0012] The labyrinthine air path system is equipped with a large particle filter screen near the end of the air outlet, with a mesh area greater than 0.8 square millimeters and less than 2 square millimeters.

[0013] The side of the large particle filter screen facing the air intake direction is tilted downwards, and a receiving cavity is provided below the side of the large particle filter screen facing the air intake direction. The receiving cavity has a depth of more than 1 cm and a volume of more than 10 square centimeters.

[0014] The detection unit also includes a centrifugal air pump, which has an air outlet that is connected to the air inlet of the labyrinthine air path system.

[0015] In the above design, the oxygen concentration sensor and sulfur hexafluoride sensor may undergo electrochemical reactions during use. The three compartments are designed to prevent mutual interference that could affect measurement accuracy. The detection unit housing contains three compartments and an air inlet chamber. The oxygen concentration sensor, sulfur hexafluoride sensor, and humidity sensor are each housed in one compartment. A single centrifugal pump is sufficient to provide the necessary gas flow paths for all three sensors, forming an integrated device. This facilitates compact integration and reduces the need for multiple centrifugal pumps, preventing resonance issues that could affect the detection unit's operation. The air inlet chamber features a labyrinthine gas path system to reduce gas pulsation and the velocity of large particles, facilitating their collection and improving sampling stability. A large-particle filter further reduces the entry of large dust or fiber particles into the compartments, preventing them from affecting the stable operation of the oxygen concentration sensor, sulfur hexafluoride sensor, and humidity sensor. The receiving cavity has a depth greater than 1 cm and a volume greater than 10 m² / cm², effectively collecting large dust or fiber particles to prevent blockage of the labyrinthine gas path system.

[0016] Preferably, the labyrinth-type airflow system includes at least three layers of spaced-apart baffle structures, with a spacing of 1-3 mm between adjacent layers. This ensures a reduction in the velocity of large particles or fibers as the gas moves through the labyrinth-type airflow system.

[0017] Preferably, the baffle structure directly opposite the air inlet is called the first baffle structure; a cavity with a volume of 4-6 square centimeters is formed between the first baffle structure and the air inlet. The cavity can create a preliminary air diffusion effect, facilitating stable gas flow and reducing gas pulse impact.

[0018] Preferably, a rubber mounting pad is provided between the compartment and the housing. This reduces vibration transmission into the compartment, ensuring stable operation of the oxygen concentration sensor, sulfur hexafluoride sensor, and humidity sensor.

[0019] Preferably, the thickness of the mounting pad is 1.5-2.5 mm.

[0020] Preferably, the central controller has communication connections with at least four detection units located in the substation, each positioned at a height of 100-200 mm above the ground. Given the high concentration of sulfur hexafluoride (SF6), installing the detection units low enough facilitates the absorption of any leaking SF6.

[0021] Preferably, the compartment has a gas outlet, and the outlet is equipped with a pressure reducing valve, which has a flexible on / off valve. The valve automatically opens when the gas pressure exceeds a threshold, and the opening amplitude increases with increasing gas pressure to maintain and balance the internal gas pressure, keeping the gas pressure in the compartment stable and improving the measurement accuracy of the oxygen concentration sensor, sulfur hexafluoride sensor, and humidity sensor.

[0022] Preferably, the inlet of the compartment is connected to the outlet of the labyrinthine air passage system using a flexible silicone tube. The silicone tube has excellent elastic cushioning properties, effectively buffering gas impacts. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0024] Figure 1 This is a schematic diagram of the internal structure of the substation gas parameter composite detection system of this utility model;

[0025] Figure 2 This is a three-dimensional schematic diagram of the internal structure of the substation gas parameter composite detection system of this utility model.

[0026] In the diagram, 1 is the housing; 2 is the oxygen concentration sensor; 3 is the sulfur hexafluoride sensor; 4 is the humidity sensor; 5 is the compartment; 6 is the receiving cavity; 61 is the large particle filter; 7 is the baffle structure; 8 is the centrifugal air pump; and 9 is the pressure reducing valve. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more readily understood, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in less than one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0031] Example 1

[0032] refer to Figure 1 and Figure 2 A substation gas parameter composite detection system includes a central controller and detection units arranged in the substation. The central controller is communicatively connected to the detection units, and the detection units also include a housing 1.

[0033] The detection unit is equipped with an oxygen concentration sensor 2, a sulfur hexafluoride sensor 3, and a humidity sensor 4;

[0034] The housing 1 of the detection unit is provided with three compartments 5, and the oxygen concentration sensor 2, the sulfur hexafluoride sensor 3 and the humidity sensor 4 are respectively installed in the three compartments 5.

[0035] All three compartments have both an exit and an entrance;

[0036] It also includes a labyrinthine air passage system, which has three air outlets and one air inlet, with the three air outlets connected to the inlets of the three compartments 5 respectively;

[0037] The labyrinthine air path system is equipped with a large particle filter 61 near the end of the air outlet, with a mesh area greater than 0.8 square millimeters and less than 2 square millimeters.

[0038] The large particle filter 61 is tilted downward on the side facing the air intake direction, and a receiving cavity 6 is provided below the side of the large particle filter 61 facing the air intake direction. The receiving cavity 6 has a depth greater than 1 cm and a volume greater than 10 square centimeters.

[0039] The detection unit also includes a centrifugal air pump 8, which has an air outlet that is connected to the air inlet of the labyrinth air circuit system.

[0040] In the above design, the oxygen concentration sensor 2 and the sulfur hexafluoride sensor 3 may undergo electrochemical reactions during use. The three compartments 5 are designed to prevent mutual interference that could affect measurement accuracy. The housing 1 of the detection unit contains three compartments 5 and an air inlet chamber. The oxygen concentration sensor 2, sulfur hexafluoride sensor 3, and humidity sensor 4 are each housed in one compartment 5. Only one centrifugal pump 8 is needed to achieve the required gas flow path for all three sensors, forming an integrated device. This facilitates compact integration and reduces the need for multiple centrifugal pumps 8 operating simultaneously, preventing resonance that could affect the detection unit's operation. The air inlet chamber is equipped with a labyrinthine gas path system to reduce gas pulsation and the velocity of large particles, facilitating their collection and improving sampling stability. A large particle filter 61 reduces the entry of large dust or fiber particles into the compartments 5, preventing them from affecting the stable operation of the oxygen concentration sensor 2, sulfur hexafluoride sensor 3, and humidity sensor 4. The cavity 6 has a depth greater than 1 cm and a volume greater than 10 square centimeters, which can collect large particles of dust or fibers to prevent blockage of the labyrinthine airway system.

[0041] The labyrinth-type airflow system includes at least three layers of spaced-apart baffle structures 7, with a spacing of 1-3 mm between adjacent layers. This ensures a reduction in the velocity of large particles or fibers as the gas moves through the labyrinth-type airflow system.

[0042] The baffle structure 7 directly opposite the air inlet is called the first baffle structure 7; a cavity with a volume of 4-6 square centimeters is formed between the first baffle structure 7 and the air inlet. The cavity 6 can create a preliminary air diffusion effect, which facilitates stable gas flow and reduces gas pulse impact.

[0043] During operation, the centrifugal air pump 8 draws in air and injects it into the inlet through the outlet. After passing through the labyrinthine airflow system, the airflow is buffered, trapping large particles of sand and fibers. The air is then distributed to the three compartments 5 for detection by the oxygen concentration sensor 2, sulfur hexafluoride sensor 3, and humidity sensor 4, before being discharged from the outlet. This buffered airflow reduces measurement fluctuations and improves accuracy. The mesh structure filters out large particles or fibers drawn in by the centrifugal air pump 8, preventing contamination of the oxygen concentration sensor 2, sulfur hexafluoride sensor 3, or humidity sensor 4, ensuring stable operation of the detection unit over extended periods.

[0044] Example 2

[0045] refer to Figure 1 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0046] A rubber mounting pad is provided between the compartment 5 and the housing 1. This reduces the transmission of vibration to the compartment 5, ensuring the stable operation of the oxygen concentration sensor 2, sulfur hexafluoride sensor 3, and humidity sensor 4.

[0047] The thickness of the mounting pad is 1.5-2.5mm.

[0048] The central controller communicates with at least four detection units located in the substation, each positioned 100-200 mm above the ground. Given the high concentration of sulfur hexafluoride (SF6), installing the detection units low enough facilitates the absorption of any leaking SF6.

[0049] The compartment 5 has a gas outlet, which is equipped with a pressure reducing valve 9. The pressure reducing valve 9 has a flexible on / off valve. It automatically opens when the gas pressure exceeds a threshold, and the opening range of the on / off valve increases with the increase of gas pressure to maintain and balance the internal gas pressure, keep the gas pressure in compartment 5 stable, and improve the measurement accuracy of oxygen concentration sensor 2, sulfur hexafluoride sensor 3, and humidity sensor 4.

[0050] The inlet of compartment 5 is connected to the outlet of the labyrinthine air passage system via a silicone elastic tube. The silicone elastic tube has excellent elastic buffering properties, which can effectively buffer gas impact.

[0051] During use, the gas in compartment 5 is discharged through pressure reducing valve 9. It automatically opens when the gas pressure exceeds the threshold, and as the gas pressure increases, the opening range of the valve increases to maintain and balance the internal gas pressure, keep the gas pressure in compartment 5 stable, and improve the measurement accuracy of oxygen concentration sensor 2, sulfur hexafluoride sensor 3 and humidity sensor 4.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A substation gas parameter composite detection system, comprising a central controller and detection units arranged in the substation, wherein the central controller is communicatively connected to the detection units, and the detection units further include a housing, characterized in that: The detection unit is equipped with an oxygen concentration sensor, a sulfur hexafluoride sensor, and a humidity sensor; The housing of the detection unit is provided with three compartments, which respectively contain the oxygen concentration sensor, the sulfur hexafluoride sensor and the humidity sensor; All three warehouses have both an exit and an entrance; It also includes a labyrinthine air system, which has three air outlets and one air inlet, with the three air outlets connected to the inlets of the three compartments respectively. The labyrinthine air path system is equipped with a large particle filter screen near the end of the air outlet, with a mesh area greater than 0.8 square millimeters and less than 2 square millimeters. The side of the large particle filter screen facing the air intake direction is tilted downwards, and a receiving cavity is provided below the side of the large particle filter screen facing the air intake direction. The receiving cavity has a depth of more than 1 cm and a volume of more than 10 square centimeters. The detection unit also includes a centrifugal air pump, which has an air outlet that is connected to the air inlet of the labyrinthine air path system.

2. The composite detection system of gas parameters of a substation according to claim 1, characterized in that: The labyrinthine airway system includes at least three layers of spaced baffle structures, with a spacing of 1-3 mm between adjacent layers.

3. The composite detection system of gas parameters of a substation according to claim 2, characterized in that: The baffle structure directly opposite the air inlet is called the first baffle structure; The first baffle structure forms a cavity with a volume of 4-6 square centimeters between itself and the air inlet.

4. The substation gas parameter composite detection system of claim 1, wherein: A rubber mounting pad is provided between the compartment and the shell.

5. The substation gas parameter composite detection system according to claim 4, characterized in that: The thickness of the mounting pad is 1.5-2.5mm.

6. The substation gas parameter composite detection system according to claim 1, characterized in that: The central controller has communication connections with at least four detection units located in the substation, each of which is positioned at a height of 100-200mm above the ground.

7. The substation gas parameter composite detection system according to claim 1, characterized in that: The outlet is equipped with a pressure reducing valve, which has a resilient on / off valve.

8. The substation gas parameter composite detection system according to claim 1, characterized in that: The inlet of the compartment is connected to the outlet of the labyrinthine air system by a flexible silicone pipe.

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