Circulating flow type SF6 gas micro-water density monitoring device

Abstract

The invention discloses a circular flow type SF6 gas micro-water density monitoring device, and relates to the technical field of gas monitoring devices.The circular flow type SF6 gas micro-water density monitoring device comprises a machine shell, a sealing assembly is arranged in the machine shell, the sealing assembly is slidably connected with the machine shell, and an infrared spectrum assembly is arranged on the machine shell; a probe is arranged on the side, close to the sealing assembly, of the infrared spectrum assembly, a gas inlet end and a gas outlet end are arranged on the sealing assembly, a gas inlet pipe and a gas outlet pipe are arranged on the machine shell, the gas inlet end is communicated with the gas inlet pipe, the gas outlet end is communicated with the gas outlet pipe, and SF6 gas is conveyed to the gas inlet end through the gas inlet pipe and flows through the sealing assembly through the gas inlet end. SF6 gas is detected by the probe in the closed assembly, and in the detection process, the closed assembly adjusts the detection environment temperature of the probe and separates SF6 from external gas, so that the external gas is prevented from being mixed with the SF6 gas; after detection, the SF6 gas is conveyed to the gas outlet end through the sealing assembly and conveyed to the gas outlet pipe through the gas outlet end to be output.

Description

Technical Field

[0001] This invention relates to the field of gas monitoring device technology, specifically a circulating flow SF6 gas micro-moisture density monitoring device. Background Technology

[0002] Sulfur hexafluoride (SF6) gas is widely used in high-voltage electrical equipment, such as gas-insulated switchgear (GIS) and circuit breakers, due to its excellent insulation and arc-quenching properties. However, the moisture content and density of SF6 gas are key parameters affecting the safe operation of these devices. Excessive moisture content reduces the insulating strength of SF6 gas and may generate harmful decomposition products when interacting with an electric arc; while insufficient gas density affects its insulation and arc-quenching performance. Therefore, real-time and accurate monitoring of the moisture content and density of SF6 gas is crucial for ensuring the safe and stable operation of power equipment. Currently, most existing SF6 gas moisture density monitoring devices employ static or semi-enclosed detection methods. During long-term operation, dust and moisture easily adhere to the probe surface, affecting infrared spectral reception. Summary of the Invention

[0003] The purpose of this invention is to provide a circulating SF6 gas micro-water density monitoring device to solve the problems raised in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A circulating SF6 gas micro-moisture density monitoring device includes a housing, an internal sealing assembly slidably connected to the housing, an infrared spectral component on the housing, a probe on the side of the infrared spectral component near the sealing assembly, the probe slidably connected to the sealing assembly, an inlet end and an outlet end on the sealing assembly, an inlet pipe and an outlet pipe on the housing, the inlet end communicating with the inlet pipe, and the outlet end communicating with the outlet pipe. The sealing assembly is used for the closed transport and detection of SF6 gas.

[0005] SF6 gas is delivered to the inlet end through the inlet pipe and flows through the sealing assembly, where it is detected by the probe. During the detection process, the sealing assembly monitors the ambient temperature of the probe. When the ambient temperature inside the sealing assembly is too high, the sealing assembly uses the gas inside the housing to dissipate heat from the probe's ambient temperature and isolates the SF6 from the outside gas to prevent mixing. After detection, the SF6 gas is delivered to the outlet end through the sealing assembly and then output through the outlet pipe.

[0006] Preferably, the sealing assembly consists of a rotating body and two fixed bodies, with the rotating body positioned between the two fixed bodies. A temperature sensor is disposed within the rotating body. One of the fixed bodies has an air inlet, and the other fixed body has an air outlet. The probe extends into the sealing assembly from the air outlet.

[0007] Preferably, a connecting body is provided between the rotating body and the fixed body, the connecting body is connected to the rotating body, the connecting body is rotatably connected to the fixed body, and the connecting body is a polygon.

[0008] When the rotating body rotates, it drives the connecting body to rotate. During the rotation of the connecting body, it causes gas disturbance around the enclosed components, allowing gas inside the casing to enter the rotating body through the connecting body.

[0009] Preferably, the housing has a plurality of support frames inside, and a support ring is provided between the plurality of support frames. The rotating body is located on the side of the support ring away from the support frame. A plurality of drive gears are provided inside the support ring. A toothed ring is provided on the side of the rotating body close to the drive gears. The toothed ring meshes with the drive gears. The drive gears are driven by a drive motor.

[0010] The controller starts the drive motor, and the drive shaft of the drive motor drives the drive gear to rotate. During the rotation of the drive gear, it meshes with the gear ring, causing the gear ring to drive the rotating body to rotate. The rotating body rotates around the axis of the support ring, and the rotating body drives the two connecting bodies to rotate.

[0011] Preferably, the side wall of the connector is provided with a plurality of communication ports, the communication ports connecting the housing to the interior of the enclosed component, a rotating plate is provided inside the communication port, the rotating plate is rotatably connected to the communication port, and the rotating plate is electromagnetically driven.

[0012] When the detection environment temperature of the probe is too high, the controller rotates the plate simultaneously via electromagnetic induction. After the plate rotates (i.e., the connection port is opened), the gas inside the housing connects with the interior of the rotating body through the connection port. As the rotating body drives the connecting body to rotate, the rotating body and the connecting body drive the gas inside the housing to flow. This allows the gas inside the housing to be transported to the interior of the rotating body through the connection port, thereby driving the gas to flow and exchange heat, thus cooling the detection environment of the probe.

[0013] Preferably, the side wall of the rotating body is provided with a plurality of partition plates, a partition block is provided between two adjacent partition plates, a cooling groove is provided between two adjacent partition plates, a plurality of cleaning plates are provided on the side of the partition block near the probe, the cleaning plates are slidably connected to the probe, and an air supply groove is provided between two adjacent cleaning plates, the air supply groove connecting the air inlet end and the air outlet end.

[0014] After the rotating plate is opened, the gas inside the housing enters the housing through the lower connecting port, and the gas is then transported along the cooling groove. The gas is transported from the lower connecting port to the upper connecting port, thereby achieving the effect of regulating the ambient temperature detected inside the rotating body. SF6 gas is delivered to the intake end through the intake pipe, and then from the intake end to the gas delivery channel. The SF6 gas flows along the gas delivery channel to the probe, and then the probe detects the SF6 gas in the gas delivery channel. Due to the setting of the partition block, the cooling tank and the gas delivery channel are separated. As a result, the gas delivery channel, as a closed space, can only deliver SF6 gas, avoiding the mixing of gas inside the casing with SF6 gas, which would lead to a decrease in detection accuracy. During the rotation of the rotating body, several partition plates are driven to rotate, which in turn drives the partition block to rotate. In turn, the partition block drives the cleaning plate to rotate. The cleaning plate slides and connects with the probe surface during rotation, and then the cleaning plate revolves around the probe's axis, thereby cleaning the probe surface and removing dust and impurities. This prevents dust and impurities present in the SF6 gas delivery environment from being transported into the gas delivery tank along with the SF6 gas. Furthermore, since there is also a certain amount of moisture in the gas, dust and impurities may adhere to the probe surface after contacting the moisture, thus affecting the reception of the infrared spectral component and the accuracy of the detection of trace moisture content and density. By placing the gas delivery slots between two adjacent cleaning plates, the area around the probe is divided into several gas delivery zones, and the SF6 gas is divided into several gas delivery streams. This allows the probe to perform separate detection on several gas delivery slots, thereby improving the detection accuracy of trace moisture content and density.

[0015] Preferably, the partition block is provided with a conveying trough, and both ends of the conveying trough are connected to the cooling trough; After the gas inside the housing enters the cooling tank, some of the gas flows into the conveying tank. The conveying tank increases the contact area between the cooling gas and the partition block, improving the efficiency of temperature change within the enclosed assembly. This regulates the operating temperature of the enclosed assembly, ensuring that the probe is always within the optimal detection temperature range, thereby improving the probe's detection accuracy.

[0016] Preferably, the diameter of the gas delivery channel near the air inlet end is smaller than the diameter of the gas delivery channel near the air outlet end, and the diameter of the gas delivery channel near the air outlet end is smaller than the diameter of the middle part of the gas delivery channel near the probe.

[0017] After the SF6 gas is transported from the inlet to the rotating body, it first enters the side of the gas delivery channel near the inlet. As the diameter of the inlet and the gas delivery channel gradually increases, the flow velocity of the SF6 gas gradually decreases as it flows through the area between the middle of the gas delivery channel and the inlet. This increases the contact time between the SF6 gas and the probe, allowing the probe to detect the micro-water density in the SF6 gas. After passing through the probe, the diameter of the gas delivery channel between the middle and the outlet gradually decreases, causing the flow velocity of the SF6 gas to increase as it flows through the area between the middle of the gas delivery channel and the outlet. This allows the SF6 gas to be quickly transported through the gas delivery channel to the outlet.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. By completely isolating SF6 gas from the external environment through a sealed component, the purity of SF6 gas during the detection process is ensured, measurement errors caused by air mixing are avoided, and detection accuracy is significantly improved.

[0019] 2. The rotating body drives the cleaning plate to revolve around the probe, removing dust and moisture adhering to the probe surface in real time, avoiding the impact of pollutant accumulation on the reception of infrared spectral signals, and ensuring the reliability of long-term operation.

[0020] 3. By setting up multiple gas delivery channels, SF6 gas is divided into multiple airflows, and the probe can detect multiple channels separately. Combined with the flow rate control design, the effective contact time between the gas and the probe is extended, improving the detection sensitivity and accuracy of trace moisture content and density. The gas delivery channels adopt a variable diameter design, with the diameter gradually increasing from the inlet end to the middle to reduce the gas flow rate and extend the detection time; the diameter gradually decreases from the middle to the outlet end to accelerate gas discharge, achieving a balance between detection efficiency and accuracy. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the casing; Figure 3 This is an internal front view of the casing; Figure 4 This is a schematic diagram of the internal structure of a closed component; Figure 5 This is a schematic diagram of the structure of a closed component; Figure 6 A structural diagram of the partition plate, divider block, and cleaning plate; Figure 7 Top view of the partitions, dividers, and cleaning panels; In the diagram: 1. Housing; 11. Infrared spectroscopy component; 12. Probe; 13. Air inlet; 14. Air outlet; 15. Air inlet pipe; 16. Air outlet pipe; 17. Support ring; 171. Drive gear; 2. Enclosed component; 21. Rotating body; 211. Gear ring; 22. Fixed body; 23. Connecting body; 231. Connecting port; 232. Rotating plate; 24. Separating plate; 25. Partition block; 251. Conveying trough; 26. Cooling trough; 27. Cleaning plate; 28. Gas conveying trough. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example: Figures 1-7 As shown, the present invention provides a technical solution for a circulating SF6 gas micro-moisture density monitoring device, including a housing 1, a sealing component 2 disposed inside the housing 1, the sealing component 2 being slidably connected to the housing 1, an infrared spectral component 11 disposed on the upper part of the housing 1, a probe 12 disposed on the side of the infrared spectral component 11 near the sealing component 2, the probe 12 being slidably connected to the sealing component 11, an air inlet end 13 and an air outlet end 14 disposed on the sealing component 2, an air inlet pipe 15 and an air outlet pipe 16 disposed on the housing 1, the air inlet end 13 being connected to the air inlet pipe 15, and the air outlet end 14 being connected to the air outlet pipe 16, the sealing component 2 being used for the closed transport and detection of SF6 gas.

[0024] In one specific embodiment of the present invention, the sealing assembly 2 is composed of a rotating body 21 and two fixed bodies 22. The rotating body 21 is disposed between the two fixed bodies 22. A temperature sensor is disposed inside the rotating body 21. One fixed body 22 is provided with an air inlet end 13, and the other fixed body 22 is provided with an air outlet end 14. The probe 12 extends into the sealing assembly 2 from the air outlet end 14.

[0025] In one specific embodiment of the present invention, the housing 1 is provided with a plurality of support frames inside, and a support ring 17 is provided between the plurality of support frames. The rotating body 21 is located on the side of the support ring 17 away from the support frame. A plurality of drive gears 171 are provided inside the support ring 17. A toothed ring 211 is provided on the side of the rotating body 21 close to the drive gears 171. The toothed ring 211 meshes with the drive gears 171. The drive gears 171 are driven by a drive motor.

[0026] In one specific embodiment of the present invention, a connecting body 23 is provided between the rotating body 21 and the fixed body 22. The connecting body 23 is connected to the rotating body 21 and rotatably connected to the fixed body 22. The connecting body 23 is a polygon.

[0027] In one specific embodiment of the present invention, a plurality of communication ports 231 are provided on the side wall of the connecting body 23. The communication ports 231 connect the housing 1 to the interior of the enclosed component 2. A rotating plate 232 is provided inside the communication port 231. The rotating plate 232 is rotatably connected to the communication port 231. The rotating plate 232 is electromagnetically driven.

[0028] In one specific embodiment of the present invention, a plurality of partition plates 24 are provided on the side wall of the rotating body 21, a partition block 25 is provided between two adjacent partition plates 24, a cooling groove 26 is provided between two adjacent partition plates 24, a plurality of cleaning plates 27 are provided on the side of the partition block 25 near the probe 12, the cleaning plates 27 are slidably connected to the probe 12, and an air supply groove 28 is provided between two adjacent cleaning plates 27, the air supply groove 28 connecting the air inlet end 13 and the air outlet end 14.

[0029] In one specific embodiment of the present invention, a conveying groove 251 is provided inside the partition block 25, and both ends of the conveying groove 251 are connected to the cooling groove 26.

[0030] In one specific embodiment of the present invention, the diameter of the gas delivery groove 28 near the air inlet end 13 is smaller than the diameter of the gas delivery groove 28 near the air outlet end 14, and the diameter of the gas delivery groove 28 near the air outlet end 14 is smaller than the diameter of the middle part of the gas delivery groove 28 near the probe 12.

[0031] Working principle of the invention: During the testing process, the enclosed assembly monitors the ambient temperature of the probe. When the ambient temperature of the probe 12 is too high, the controller controls the drive motor to start. The drive shaft of the drive motor drives the drive gear 171 to rotate. During the rotation, the drive gear 171 meshes with the gear ring 211, causing the gear ring 211 to rotate and drive the rotating body 21 to rotate. The rotating body 21 rotates around the axis of the support ring 17, and the rotating body 21 drives the two connecting bodies 23 to rotate. Simultaneously, the controller rotates the electromagnetic rotating plate 232. After the rotating plate 232 rotates (i.e., the connecting port 231 is opened), the gas inside the housing 1 is connected to the interior of the rotating body 21 through the connecting port 231. As the rotating body 21 drives the connecting body 23 to rotate, the rotating body 21 and the connecting body 23 will drive the gas flow inside the housing 1. After the rotating plate 232 is opened, the gas inside the housing 1 enters the housing 1 through the connecting port 231 located below. The gas is then transported along the cooling groove 26. The gas is transported from the connecting port 231 located below to the connecting port 231 located above, thereby achieving the effect of regulating the ambient temperature detected inside the rotating body 21. After the gas inside the housing 1 enters the cooling tank 26, some of the gas will flow to the conveying tank 251. The conveying tank 251 increases the contact area between the cooling gas and the partition block 25, improves the efficiency of temperature change inside the closed component 2, thereby regulating the operating temperature of the closed component 2 and keeping the probe 12 always within the optimal detection temperature range. SF6 gas is delivered to the inlet end 13 through the inlet pipe 15, and then from the inlet end 13 to the gas delivery channel 28, so that the SF6 gas flows along the gas delivery channel 28 and passes through the probe 12. The probe 12 then detects the SF6 gas in the gas delivery channel 28. Due to the setting of the partition block 25, the cooling channel 26 and the gas delivery channel 28 are separated. Thus, the gas delivery channel 28, as a closed space, can only deliver SF6 gas, avoiding the mixing of gas in the casing 1 with SF6 gas, which would lead to a decrease in detection accuracy. During the rotation of the rotating body 21, it drives several partition plates 24 to rotate, which in turn drives the partition block 25 to rotate. In turn, the partition block 25 drives the cleaning plate 27 to rotate. During the rotation, the cleaning plate 27 slides and connects with the surface of the probe 12. The cleaning plate 27 then revolves around the axis of the probe 12, thereby cleaning the surface of the probe 12 and removing dust and impurities attached to the surface of the probe 12. This prevents dust and impurities present in the SF6 gas delivery environment from being transported into the gas delivery tank 28 along with the SF6 gas. Furthermore, since there is also a certain amount of moisture in the gas, dust and impurities may adhere to the surface of the probe 12 after contacting the moisture, thereby affecting the reception of the infrared spectral component 11 and thus affecting the accuracy of the detection of trace moisture content and density. By setting the gas delivery channel 28 between two adjacent cleaning plates 27, the area around the probe 12 is divided into several gas delivery areas, and the SF6 gas is divided into several gas delivery streams, so that the probe 12 can perform separate detection on several gas delivery channels 28. After the SF6 gas is transported from the inlet end 13 to the rotating body 21, it first enters the gas delivery channel 28 near the inlet end 13. As the diameter of the inlet end 13 and the gas delivery channel 28 gradually increases, the flow rate of the SF6 gas gradually decreases when it flows through the area between the middle of the gas delivery channel 28 and the inlet end 13. This increases the contact time between the SF6 gas and the probe 12, allowing the probe 12 to detect the micro-water density in the SF6 gas. After passing through the probe 12, the diameter of the gas delivery channel 28 between the middle and the outlet end 14 gradually decreases, causing the flow rate of the SF6 gas to increase when it flows through the area between the middle of the gas delivery channel 28 and the outlet end 14. This allows the SF6 gas to be quickly transported through the gas delivery channel 28 to the outlet end 14 and then from the outlet end 14 to the outlet pipe 16 for output.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A circulating flow type SF6 gas micro-moisture density monitoring device, characterized in that: The device includes a housing (1), inside which a sealing component (2) is provided, the sealing component (2) being slidably connected to the housing (1), an infrared spectral component (11) being provided on the housing (1), a probe (12) being provided on the side of the infrared spectral component (11) near the sealing component (2), the probe (12) being slidably connected to the sealing component (2), an air inlet (13) and an air outlet (14) being provided on the sealing component (2), an air inlet pipe (15) and an air outlet pipe (16) being provided on the housing (1), the air inlet (13) being connected to the air inlet pipe (15), and the air outlet (14) being connected to the air outlet pipe (16), the sealing component (2) being used for the sealed transport and detection of SF6 gas.

2. The circulating flow type SF6 gas micro-water density monitoring device according to claim 1, characterized in that: The enclosed assembly (2) consists of a rotating body (21) and two fixed bodies (22). The rotating body (21) is arranged between the two fixed bodies (22). One of the fixed bodies (22) is provided with an air inlet (13), and the other fixed body (22) is provided with an air outlet (14). The probe (12) extends into the enclosed assembly (2) from the air outlet (14).

3. The circulating flow type SF6 gas micro-water density monitoring device according to claim 2, characterized in that: A connecting body (23) is provided between the rotating body (21) and the fixed body (22). The connecting body (23) is connected to the rotating body (21) and is rotatably connected to the fixed body (22). The connecting body (23) is a polygon.

4. The circulating SF6 gas micro-moisture density monitoring device according to claim 2, characterized in that: The housing (1) has several support frames inside, and a support ring (17) is provided between the support frames. The rotating body (21) is located on the side of the support ring (17) away from the support frame. Several drive gears (171) are provided inside the support ring (17). A toothed ring (211) is provided on the side of the rotating body (21) close to the drive gear (171). The toothed ring (211) meshes with the drive gear (171). The drive gear (171) is driven by a drive motor.

5. The circulating SF6 gas micro-moisture density monitoring device according to claim 3, characterized in that: The side wall of the connector (23) is provided with a plurality of communication ports (231), the communication ports (231) connect the housing (1) and the interior of the enclosed component (2), a rotating plate (232) is provided inside the communication port (231), the rotating plate (232) is rotatably connected to the communication port (231), and the rotating plate (232) is electromagnetically driven.

6. The circulating SF6 gas micro-moisture density monitoring device according to claim 2, characterized in that: The rotating body (21) has several partition plates (24) on its side wall. A partition block (25) is provided between two adjacent partition plates (24). A cooling groove (26) is provided between two adjacent partition plates (24). Several cleaning plates (27) are provided on the side of the partition block (25) near the probe (12). The cleaning plate (27) is slidably connected to the probe (12). A gas delivery groove (28) is provided between two adjacent cleaning plates (27). The gas delivery groove (28) connects the air inlet (13) and the air outlet (14).

7. A circulating SF6 gas micro-moisture density monitoring device according to claim 6, characterized in that: The partition block (25) is provided with a conveying groove (251), and both ends of the conveying groove (251) are connected to the cooling groove (26).

8. A circulating SF6 gas micro-moisture density monitoring device according to claim 6, characterized in that: The diameter of the gas delivery groove (28) near the air inlet end (13) is smaller than the diameter of the gas delivery groove (28) near the air outlet end (14), and the diameter of the gas delivery groove (28) near the air outlet end (14) is smaller than the diameter of the middle part of the gas delivery groove (28) near the probe (12).

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