A transmitter for on-line micro water density

Abstract

The present invention discloses a transmitter for on-line micro water density, belonging to the technical field of micro water density detection equipment. It includes a connection component, and the connection component includes a connection body with a hollow interior. Two partition plates are installed inside the connection body, and the two partition plates divide the interior of the connection body into a detection area and two circulating reflux areas. Both of the two circulating reflux areas are connected to the airtight unit, and there is a set height difference at the connection; a transmitter main body is installed on the connection body, and the sensor probe of the transmitter main body is inserted into the detection area; the circulating reflux area is communicated with the detection area through two flow conversion holes opened on the partition plate; the sealing plate is rotatably connected to the connection body through a support shaft, and the support shaft is connected to the output end of the corresponding drive component. In the present invention, the drive component drives and controls the rotation of the support shaft, so that the sealing plate rotates and controls the communication state between the detection area and the circulating reflux area to switch the gas flow direction. The detection mode of the present invention is dynamically reconfigurable and supports intelligent switching between layered and mixed detections.

Description

Technical Field

[0001] The present invention relates to the technical field of micro-water density detection equipment, and more specifically, to a transmitter for on-line micro-water density. Background Art

[0002] As the core insulating medium of high-voltage circuit breakers, the state stability of SF6 gas directly affects the safety and environmental protection performance of equipment. When the water content of SF6 gas exceeds the standard, hydrolysis reaction of SF6 can occur at temperatures above 200 °C, generating hydrofluoric acid and low-valent sulfur fluorides such as SOF2, SO2F2, SF4, and SOF4. Under the action of arc high temperature, it will further decompose to produce sulfur dioxide and hydrofluoric acid. The above products will corrode insulating parts and metal components, and the reaction heat release will cause abnormal increase in the pressure in the gas chamber, weakening the withstand voltage strength and breaking capacity of the circuit breaker. In severe cases, it will cause the explosion of the circuit breaker, which will not only cause power grid accidents, but also release harmful and greenhouse gases into the atmosphere, forming electrical and environmental disasters. Therefore, the state monitoring of SF6 gas has become one of the main technical measures to ensure the normal and safe operation of electrical equipment such as SF6 circuit breakers.

[0003] Under the action of the shape of the airtight unit, the position of the contacts, the distribution of the low-temperature and high-temperature zones, and the arc, etc., the SF6 gas is prone to stratification, forming local high-humidity / low-density regions. However, the existing single-point detection equipment is limited by insufficient spatial resolution and is difficult to accurately reflect the spatial distribution characteristics of gas parameters. In view of this, we propose a transmitter for on-line micro-water density. Summary of the Invention

[0004] The purpose of the present invention is to provide a transmitter for on-line micro-water density, which is used to solve the technical problem that the existing single-point detection equipment is limited by insufficient spatial resolution and is difficult to accurately reflect the spatial distribution characteristics of gas parameters.

[0005] An embodiment of the present invention provides a transmitter for on-line micro-water density, including a connection component.

[0006] The connection component includes a hollow connection body, and two groups of partition plates are installed in the connection body. The two groups of partition plates divide the interior of the connection body into a detection area and two groups of circulating return areas. Both groups of circulating return areas are communicated with the airtight unit, and there is a set height difference at the communication part.

[0007] A transmitter main body is installed on the connection body, and the sensor probe of the transmitter main body is inserted into the detection area.

[0008] The circulating return area is communicated with the detection area through two groups of flow conversion holes opened on the partition plates.

[0009] A plurality of sealing plates, the sealing plates are rotatably connected to the connection body through support shafts, and the support shafts are connected to the output ends of the corresponding driving components.

[0010] The driving component drives the control support shaft to rotate, causing the sealing plate to rotate and controlling the connection state between the detection area and the circulation return area to switch the gas flow direction.

[0011] As a further description of the above technical solution, the circulation return area is connected to the airtight unit through circulation pipes installed at both ends thereof. Two sets of circulation return areas are respectively located on both sides of the detection area, and the heights of the connections between the two circulation pipes of the same group and the airtight unit are equal and symmetric about the axis of the airtight unit.

[0012] As a further description of the above technical solution, the driving component includes a motor and two sets of first bevel gears installed in the connection body. The first bevel gears are fixedly installed on the corresponding support shafts. The output shaft of the motor is fixedly connected to a connection shaft rotatably connected to the connection body. Two sets of second bevel gears are fixedly installed on the connection shaft, and the second bevel gears are meshed and driven with the corresponding first bevel gears.

[0013] As a further description of the above technical solution, the two sets of second bevel gears are installed on different sides of the corresponding first bevel gears, so that the rotation directions of the two sealing plates in the same circulation return area are opposite.

[0014] As a further description of the above technical solution, the two flow conversion holes on the same partition are distributed on both sides of the transmitter body.

[0015] As a further description of the above technical solution, it further includes a conveying component;

[0016] The conveying component includes an external connection pipe. One end of the external connection pipe is connected with a three-way pipe, and the other end is connected to a gas supplementing device. Both air outlets of the three-way pipe are screwed with valve pipes. A plug is slidably connected in the valve pipe. An elastic member for pushing the plug is installed in the valve pipe. A plurality of air inlets communicating with the inside of the valve pipe are opened on the plug. The end of the valve pipe away from the three-way pipe is installed on the partition and communicates with the corresponding circulation return area.

[0017] As a further description of the above technical solution, the conveying component further includes a plug head. The plug head is installed at the end of the plug through an elastic body, and the plug head is used to block the air inlet of the valve pipe.

[0018] As a further description of the above technical solution, the elastic force of the elastic member is greater than the elastic force of the elastic body.

[0019] As a further description of the above technical solution, a filter screen for gas filtration is installed at the end of the circulation pipe.

[0020] As a further description of the above technical solution, when one end of the sealing plate abuts against the limiting block in the connection body, the sealing plate is in an inclined state.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. The detection mode of the present invention is dynamically reconfigurable, supporting intelligent switching between hierarchical / hybrid detection; by setting a double-cycle reflux area and cooperating with a motor-driven sealing plate to precisely control the air flow path, and then adjusting the connection between the double-cycle reflux area and the detection area, independent detection of the upper and lower hierarchical areas of the airtight unit and comprehensive analysis of the mixed gas are realized, avoiding the distortion of density and humidity data caused by gas stratification; when the sealing plate opens the double channel, the gas in the airtight unit is mixed in the detection area, realizing the uniformity evaluation of the gas in the entire area of the airtight unit, and improving the detection coverage and the reliability of insulation state judgment.

[0023] 2. The present invention forms a vertical detection baseline by connecting two sets of cycle reflux areas to different heights of the airtight unit, breaking through the limitations of traditional single-point detection and realizing directional data capture of typical working condition points of the arc extinguishing chamber.

[0024] 3. During the air replenishment period of the present invention, the cycle reflux area is isolated from the detection area, thereby realizing the closure of the detection area, preventing the air replenishment airflow from directly impacting the sensor probe with impurities or moisture, interfering with the accuracy of the sensor, avoiding abnormal alarm of the transmitter, and reducing the risk of misjudgment.

[0025] 4. The conveying component of the present invention adopts a double-layer elastic plugging structure. During air replenishment, the high-pressure gas lifts the plugging and quickly injects into the upper and lower areas of the arc extinguishing chamber through the circulation pipe, shortening the gas diffusion time and avoiding the problems of local density unevenness caused by single-point injection or the need for a long diffusion time to ensure the uniformity of the replenished gas in traditional air replenishment; after air replenishment, the elastic member automatically resets, and the sealing performance is better than that of a single valve structure, reducing the leakage risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of a transmitter for on-line micro water density disclosed in a preferred embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of the sealing plate distribution of a transmitter for on-line micro water density disclosed in a preferred embodiment of the present invention;

[0028] Figure 3 It is a schematic diagram of the installation position of the drive component of a transmitter for on-line micro water density disclosed in a preferred embodiment of the present invention;

[0029] Figure 4 It is a schematic diagram of the main body structure of a transmitter for on-line micro water density disclosed in a preferred embodiment of the present invention;

[0030] Figure 5 It is a schematic diagram of the sealing plate transmission structure of a transmitter for on-line micro water density disclosed in a preferred embodiment of the present invention;

[0031] Figure 6 Schematic diagram of the tee connection structure of a transmitter for on-line micro water density according to a preferred embodiment of the present invention;

[0032] Figure 7 Schematic diagram of the conveying assembly structure of a transmitter for on-line micro water density according to a preferred embodiment of the present invention;

[0033] Figure 8 For a transmitter for on-line micro water density according to a preferred embodiment of the present invention Figure 2 Enlarged view at position A.

[0034] Description of reference numerals in the figure: 1. Connection assembly; 11. Connector body; 12. Partition; 13. Detection area; 14. Circulation and reflux area; 15. Circulation pipe; 16. Filter screen; 17. Threaded hole; 18. Flow conversion hole; 19. Sealing ring; 110. Baffle; 111. Limit block; 112. Driving chamber; 2. Transmitter main body; 21. Pressure sensor; 22. Temperature sensor; 23. Humidity sensor; 3. Sealing plate; 4. Support shaft; 5. Driving assembly; 51. Motor; 52. First bevel gear; 53. Connecting shaft; 54. Second bevel gear; 6. Conveying assembly; 61. Outer connecting pipe; 62. Tee; 63. Valve pipe; 64. Plug; 65. Elastic member; 66. Air inlet hole; 67. Plug head; 68. Elastic body. Detailed implementation manners

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Referring to Figures 1 to 8 , this embodiment discloses a transmitter for on-line micro water density, including a connection assembly 1. The connection assembly 1 includes a connector body 11 with a hollow interior. Two partitions 12 are fixedly installed inside the connector body 11. The two partitions 12 divide the interior of the connector body 11 into a detection area 13 and two circulation and reflux areas 14. The two circulation and reflux areas 14 are respectively located on both sides of the detection area 13. Circulation pipes 15 are connected and installed at both ends of the circulation and reflux areas 14. A flange and a filter screen 16 are installed at the end of the circulation pipe 15. The filter screen 16 is used to filter the gas to prevent impurity particles from entering the connector body 11 and causing pollution or corrosion to the internal components. The installation heights of the two circulation pipes 15 corresponding to the same circulation and reflux area 14 on the airtight unit are equal and symmetrically arranged about the axis of the airtight unit. There is a certain distance in the installation height between the two circulation pipes 15 of non-same circulation and reflux areas 14.

[0037] If the circulating pipes 15 in different groups are installed at different heights in the arc extinguishing chamber, when the SF6 gas in the arc extinguishing chamber is stratified, resulting in uneven density and purity or there is a leakage point, the SF6 gas at two different heights can freely diffuse through the circulating pipe 15 to the connector 11, and then through the switching of the internal connection method of the connector 11, the density detection of the SF6 gas in different layers can be realized, avoiding the overall density decrease or insulation failure caused by air leakage or uneven gas distribution, and timely taking measures such as gas replenishment and contact locking to protect the safety of the equipment.

[0038] The connector 11 is provided with a threaded hole 17, and a transmitter main body 2 is screwed and fixed in the threaded hole 17. The partition plate 12 is provided with at least two groups of commutation holes 18. The circulating return area 14 is communicated with the detection area 13 through the commutation holes 18. The two commutation holes 18 on the same partition plate 12 are distributed on both sides of the threaded hole 17. A sealing ring 19 is arranged on the periphery of the commutation hole 18 for maintaining the sealing performance when the commutation hole 18 is blocked. A baffle 110 is fixedly installed in the detection area 13, and several commutation holes 18 are all on one side of the baffle 110. A limiting block 111 is fixedly installed in the circulating return area 14. Two surfaces of the limiting block 111 form a certain angle with the inner wall of the circulating return area 14, reducing the resistance of the air flow and improving the smoothness of the air flow. A driving chamber 112 is arranged at the bottom of the connector 11.

[0039] The transmitter main body 2 includes a housing and a main board installed in the housing. The housing is screwed in the threaded hole 17, and a seal is provided at the connection. The main board is integrated with a pressure sensor 21, a temperature sensor 22 and a humidity sensor 23. The pressure sensor 21, the temperature sensor 22 and the humidity sensor 23 are all inserted into the detection area 13 for respectively collecting the pressure signal, the temperature signal of the gas and the humidity signal of the gas in the detection area 13.

[0040] Refer to Figure 2 、 Figure 3 and Figure 5 The transmitter further includes a number of sealing plates 3. The sealing plates 3 are located in the circulating return area 14 and the number corresponds to the number of the commutation holes 18. The sealing plates 3 are used to block the corresponding commutation holes 18 to realize the connection control between the detection area 13 and the circulating return area 14, and thus control the gas flow direction. When the sealing plate 3 blocks the commutation hole 18, the gas freely flows in the circulating return area 14. When the sealing plate 3 rotates and one end abuts against the limiting block 111, the gas in the circulating return area 14 can enter the detection area 13 through the commutation hole 18, and the transmitter main body 2 can detect the parameters of the passing gas. When one end of the sealing plate 3 abuts against the limiting block 111, the sealing plate 3 is inclined at a certain angle at this time, thereby reducing the gas flow resistance.

[0041] The sealing plate 3 is rotatably connected to the connecting body 11 through a support shaft 4, and the support shaft 4 is inserted into the driving chamber 112; the transmitter further includes two groups of driving components 5 installed in the driving chamber 112. The driving component 5 includes a motor 51 fixedly installed in the driving chamber 112 and two groups of first bevel gears 52. The first bevel gears 52 are fixedly installed on the corresponding support shafts 4. The output shaft of the motor 51 is fixedly connected to a connecting shaft 53 that is rotatably connected to the connecting body 11. Two groups of second bevel gears 54 are fixedly installed on the connecting shaft 53. The second bevel gears 54 are meshed and driven with the corresponding first bevel gears 52. The two groups of second bevel gears 54 are installed on different sides of the corresponding first bevel gears 52, so that the rotation directions of the two support shafts 4 and the sealing plate 3 are opposite.

[0042] Referring to Figures 1 to 3 and Figures 6 to 8 , a conveying component 6 is installed on the connecting body 11. The conveying component 6 includes an outer connecting pipe 61. One end of the outer connecting pipe 61 is communicated and installed with a three-way pipe 62, and the other end is connected to an air supplement device. Both air outlets of the three-way pipe 62 are screwed with valve pipes 63. A plug 64 is slidably connected in the valve pipe 63. An elastic member 65 for pushing the end of the plug 64 to abut against the valve pipe 63 is installed in the valve pipe 63. A plurality of air inlet holes 66 communicating with the inside of the valve pipe 63 are opened on the plug 64;

[0043] The conveying component 6 further includes a plug 67. The plug 67 is installed at the end of the plug 64 through an elastic body 68. The plug 67 is used to block the air inlet of the valve pipe 63. The elastic force of the elastic member 65 is greater than the elastic force of the elastic body 68. One end of the valve pipe 63 away from the three-way pipe 62 is installed on the partition plate 12 and communicated with the corresponding circulating return area 14. The baffle 110 is used to isolate the conveying component 6, so as to reduce the erosion of the gas on the conveying component 6, and further reduce the risk of air leakage at each connection of the conveying component 6. Through the double-layer sealing of the plug 67 and the plug 64, the present invention can effectively avoid the problem of incomplete sealing caused by impurities in the gas and improve the sealing effect.

[0044] Working principle: For the convenience of description, the circulating return area 14 communicated with the upper area of the arc extinguishing chamber is the first circulating return area 14, and the circulating return area 14 communicated with the lower area of the arc extinguishing chamber is the second circulating return area 14.

[0045] Initially, several sealing plates 3 are all blocked at the corresponding commutation holes 18; when detecting the gas in the upper region of the arc extinguishing chamber, the motor 51 corresponding to the first circulating reflux zone 14 starts, and the motor 51 drives the connecting shaft 53 and the second bevel gear 54 to rotate. Through meshing transmission, the first bevel gear 52, the support shaft 4 and the two groups of sealing plates 3 are driven to rotate. The two groups of sealing plates 3 rotate to separate the first circulating reflux zone 14, and the commutation hole 18 corresponding to the first circulating reflux zone 14 is opened. Then the gas diffuses from the first circulating reflux zone 14 into the detection zone 13 through the commutation hole 18, and the sensor probe of the transmitter main body 2 collects information, realizing the detection of parameters such as gas density, pressure, temperature and trace moisture in the upper region of the arc extinguishing chamber by the transmitter. Before the detection of the present invention, the gas in the arc extinguishing chamber has entered the circulating reflux zone 14 through the circulating pipe 15 by means of free diffusion. Therefore, when the detection mode is turned on, the gas in the circulating reflux zone 14 can quickly diffuse into the detection zone 13, thereby improving the detection efficiency.

[0046] When detecting the gas in the lower region inside the arc extinguishing chamber, the motor 51 corresponding to the first circulating reflux zone 14 drives and controls the sealing plate 3 to rotate to block the corresponding commutation hole 18, and the motor 51 corresponding to the second circulating reflux zone 14 drives and controls the corresponding sealing plate 3 to rotate. The commutation hole 18 corresponding to the second circulating reflux zone 14 is opened, and the gas in the second circulating reflux zone 14 diffuses into the detection zone 13 through the commutation hole 18. The sensor probe of the transmitter main body 2 collects information, realizing the detection of parameters such as gas density, pressure, temperature and trace moisture in the lower region of the arc extinguishing chamber by the transmitter.

[0047] The transmitter of the present invention also has a mixed detection mode. Specifically, the two groups of motors 51 respectively drive and control the sealing plates 3 in the corresponding circulating reflux zones 14 to rotate, so that the commutation holes 18 in the two circulating reflux zones 14 are both opened. The gas in the upper region and the lower region of the arc extinguishing chamber can both diffuse to the detection zone 13, thereby realizing the detection of parameters such as gas density and trace moisture after the gas is mixed, improving the diversity of data collection by the transmitter, and facilitating the analysis of the uniformity after the gas is mixed.

[0048] After being detected by the main body 2 of the transmitter, when the density of SF6 gas in the arc extinguishing chamber is lower than the set threshold, gas replenishment operation is required. Specifically, the motor 51 drives and controls the sealing plate 3 to rotate and block the corresponding commutation hole 18, so that the detection area 13 is in an isolated state. The gas replenishment device stably transports SF6 gas into the external connection pipe 61. The gas enters the three-way pipe 62 and pushes the plug 67 and the block 64 to move and compress the elastic member 65 and the elastic body 68. The air inlet hole 66 is communicated with the three-way pipe 62. The SF6 gas enters the two circulating reflux areas 14 through the air inlet hole 66 and the valve pipe 63, and then is quickly replenished into the upper and lower areas of the arc extinguishing chamber through the circulating pipe 15, effectively reducing the time for the replenished SF6 gas to diffuse uniformly, and realizing the rapid, full and uniform mixing of SF6 gas; after removing the gas supply pressure, the elastic member 65 and the elastic body 68 can quickly block the air inlet of the valve pipe 63 to achieve sealing and reduce the risk of SF6 gas leakage. During the gas replenishment process, the detection area 13 is in an isolated state, avoiding problems such as gas flow interfering with the accuracy of the sensor or causing pollution and corrosion, and also avoiding triggering abnormal alarms of the transmitter and reducing the risk of misjudgment.

[0049] As described above, it is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes, shall be covered by the protection scope of the present invention.

Claims

1. An on-line micro water density transmitter, characterized in that: It includes a connecting component (1), The connecting component (1) includes a hollow connecting body (11). Inside the connecting body (11), two groups of partition plates (12) are installed. The two groups of partition plates (12) divide the interior of the connecting body (11) into a detection area (13) and two groups of circulating reflux areas (14). Both groups of circulating reflux areas (14) are communicated with the airtight unit through circulating pipes (15) installed at both ends thereof, and there is a set height difference at the communication part; the heights of the two circulating pipes (15) in the same group at the communication part with the airtight unit are equal; A transmitter main body (2) is installed on the connecting body (11), and the sensor probe of the transmitter main body (2) is inserted into the detection area (13); The circulating reflux area (14) is communicated with the detection area (13) through two groups of flow conversion holes (18) opened on the partition plate (12); Several sealing plates (3), the sealing plates (3) are rotatably connected to the connecting body (11) through support shafts (4), and the support shafts (4) are connected to the output ends of the corresponding driving components (5); A conveying component (6), the conveying component (6) includes an outer connecting pipe (61). One end of the outer connecting pipe (61) is communicated and installed with a three-way pipe (62), and the other end is connected to a gas supplementing device. Both air outlets of the three-way pipe (62) are screwed with valve pipes (63). A plug block (64) is slidably connected inside the valve pipe (63). An elastic member (65) for pushing the plug block (64) is installed inside the valve pipe (63). Several air inlet holes (66) communicating with the inside of the valve pipe (63) are opened on the plug block (64). The end of the valve pipe (63) away from the three-way pipe (62) is installed on the partition plate (12) and is communicated with the corresponding circulating reflux area (14); The conveying component (6) further includes a plug (67), and the plug (67) is installed at the end of the plug block (64) through an elastic body (68), and the plug (67) is used to block the air inlet of the valve pipe (63); The driving component (5) drives and controls the support shaft (4) to rotate, so that the sealing plate (3) rotates and controls the communication state between the detection area (13) and the circulating reflux area (14) to switch the flow direction of the gas.

2. An on-line micro water density transmitter according to claim 1, characterized in that: The two groups of circulating reflux areas (14) are respectively located on both sides of the detection area (13), and the two circulating pipes (15) in the same group are symmetric about the axis of the airtight unit.

3. An on-line micro water density transmitter according to claim 1, characterized in that: The driving component (5) includes a motor (51) installed inside the connecting body (11) and two groups of first bevel gears (52). The first bevel gears (52) are fixedly installed on the corresponding support shafts (4). The output shaft of the motor (51) is fixedly connected with a connecting shaft (53) rotatably connected to the connecting body (11). Two groups of second bevel gears (54) are fixedly installed on the connecting shaft (53), and the second bevel gears (54) are meshed and driven with the corresponding first bevel gears (52).

4. An on-line micro water density transmitter according to claim 3, characterized in that: The two groups of second bevel gears (54) are installed on different sides of the corresponding first bevel gears (52), so that the rotation directions of the two sealing plates (3) in the same circulating reflux area (14) are opposite.

5. An on-line micro water density transmitter according to claim 1, characterized in that: The two flow conversion holes (18) on the same partition plate (12) are distributed on both sides of the transmitter main body (2).

6. An on-line micro water density transmitter according to claim 1, characterized in that: The elastic force of the elastic member (65) is greater than the elastic force of the elastic body (68).

7. An on-line micro water density transmitter according to claim 2, characterized in that: A filter screen (16) for gas filtration is installed at the end of the circulation pipe (15).

8. An on-line micro water density transmitter according to any one of claims 1-6, characterized in that: When one end of the sealing plate (3) abuts against the limiting block (111) in the connecting body (11), the sealing plate (3) is in an inclined state.

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