SF6 wireless gas detection device

Abstract

The utility model discloses a wireless SF6 gas detection device, which relates to the field of gas monitoring and comprises a gas storage bottle, high-pressure SF6 gas is stored in the gas storage bottle, a gas guide pipe is arranged at the top end of the gas storage bottle, an inner pipe is arranged in the gas guide pipe, the inner pipe is elastically connected with the gas guide pipe, and the gas guide pipe is connected with the gas storage bottle. A bag cover with the inner diameter identical to the diameter of the inner pipe is arranged in the gas guide pipe, a plurality of through holes are formed in the bag cover, a gas storage bottle containing high-pressure SF6 gas is arranged in the inner pipe and the bag cover in a sliding mode, and when the gas pressure monitoring module detects that the SF6 gas pressure in the insulation cabinet is reduced, the high-pressure gas in the gas storage bottle is exhausted into the cabinet body. The SF6 gas pressure in the cabinet body can be ensured to stabilize the working state of a circuit element, and the gas storage bottle is in a stable exhaust state in the initial period to the last period of gas release, so that the situation that gas leakage is more serious due to the fact that high-pressure gas enters the cabinet or not in a short time during initial exhaust is avoided, and in addition, the service life of the gas cylinder is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of gas monitoring, in particular to a SF6 wireless gas detection device. Background Art

[0002] The current mainstream 10kV gas-insulated cabinet pressure monitoring device monitors the sulfur hexafluoride gas pressure in the gas-insulated cabinet through an external barometer to determine whether the gas pressure parameters in the gas box meet the safety operation requirements to achieve the monitoring purpose.

[0003] When the gas monitoring device detects SF6 gas leakage in the cabinet, there is a risk of arc in the circuit of the cabinet. Before the maintenance personnel arrive at the cabinet, the use of the cabinet is at risk. Therefore, an SF6 wireless gas detection device is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a SF6 wireless gas detection device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a SF6 wireless gas detection device, comprising a gas cylinder, wherein the gas cylinder contains high-pressure SF6 gas, an integrated box integrating a plurality of monitoring modules is arranged on the surface of the gas cylinder, a gas guide tube is arranged on the top of the gas cylinder, an inner tube is arranged in the gas guide tube, the inner tube is elastically connected to the gas guide tube, a bag cover with the same inner diameter as the inner tube diameter is arranged in the gas guide tube, a plurality of through holes are opened on the bag cover, the inner tube slides in the bag cover, a gas cylinder containing high-pressure SF6 gas is arranged, when the pressure monitoring module detects that the SF6 pressure in the insulating cabinet is reduced, the high-pressure gas in the gas cylinder is discharged into the cabinet to ensure that the SF6 pressure in the cabinet can stabilize the working state of the circuit components, and the gas cylinder is in a stable discharge state from the initial to the final period of releasing the gas, so as to avoid whether the high-pressure gas reaches the cabinet within a short period of time during the initial exhaust, resulting in more serious leakage, and also improve the service life of the gas cylinder.

[0006] Preferably, a guide rod is provided at the center of the air duct, and a twist cap and a rotating plate are respectively provided at both ends of the guide rod. The twist cap is located outside the gas cylinder and covers the port of the air duct, and the rotating plate is located inside the gas cylinder and in the other port of the air duct, so that the twist cap can be rotated from the outside to adjust the angle of the through hole on the rotating plate to manually close the gas cylinder.

[0007] Preferably, a spacer fitted with the rotating plate is provided inside the air guide tube, and staggered through holes are provided on the rotating plate and the spacer to facilitate the passage of gas through the through holes.

[0008] Preferably, the inner tube is slidably mounted on the guide rod, and a plurality of elastic bands are provided on the inner tube to be connected with the spacer. As the exhaust is carried out, the pressure of the airflow on the bag cover decreases, and the elastic bands pull the bag cover inward to increase the diameter of the through hole.

[0009] Preferably, the top end of the inner tube is sealed and connected to the inner wall, and the through hole on the inner tube is opened from the inner direction to the outside, and the size of the through hole diameter can be adjusted by changing the position of the bag cover on the inner tube.

[0010] Preferably, the integrated box includes a built-in air pressure monitoring sensor, a wireless transmission module, an induction power collection coil for supplying power to both, and an external data acquisition terminal.

[0011] Preferably, the wireless transmission module transmits air pressure signals to a data acquisition terminal arranged outside, a motor control module for driving the diaphragm to rotate is also arranged in the air guide tube, and the wireless transmission module and the motor control module are also connected via wireless signals.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: a gas cylinder containing high-pressure SF6 gas is provided, and when the gas pressure monitoring module detects that the SF6 gas pressure in the insulating cabinet is reduced, the high-pressure gas in the gas cylinder is discharged into the cabinet to ensure that the SF6 gas pressure in the cabinet can stabilize the working state of the circuit components, and the gas cylinder is in a stable discharge state from the initial to the final period of gas release to avoid the high-pressure gas from entering the cabinet in a short period of time during the initial exhaust, resulting in more serious gas leakage. In addition, the service life of the gas cylinder is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall appearance of the utility model;

[0014] Figure 2 This is a schematic diagram of the air guide tube of the utility model;

[0015] Figure 3 This is a schematic diagram of the internal structure of the air guide tube of the utility model;

[0016] Figure 4 It is a schematic diagram of the capsule cover of the utility model;

[0017] Figure 5 It is a schematic diagram of the working of the bag cover and the inner tube of the utility model;

[0018] Figure 6 It is a schematic diagram of the module flow of the utility model.

[0019] In the figure: 1. gas cylinder; 2. gas guide tube; 3. twist cap; 4. integrated box; 5. rotating plate; 6. guide rod; 7. spacer; 8. bag cover; 9. inner tube; 10. elastic band. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figures 1 to 6 As shown, the utility model provides a technical solution of a SF6 wireless gas detection device: a SF6 wireless gas detection device, comprising a gas cylinder 1 storing high-pressure SF6 gas, an integrated box 4 with a plurality of detection modules integrated therein is arranged on the surface of the gas cylinder 1, and a gas guide tube 2 is arranged on the top of the gas cylinder 1;

[0022] See also Figure 6 As shown, the integrated box 4 has a built-in air pressure monitoring sensor, a wireless transmission module, and an induction power coil for supplying power to both. The wireless transmission module transmits an air pressure signal to a data acquisition terminal set up in the outside world. In addition, a motor control module is also set in the gas storage cylinder 1, and the wireless transmission module and the motor control module are also connected through wireless signals;

[0023] See also Figures 1 to 5 As shown, the air guide tube 2 is the exhaust port of the gas cylinder 1, a guide rod 6 is provided at the center of the air guide tube 2, and a twist cap 3 and a rotating plate 5 are provided at both ends of the guide rod 6, respectively. The twist cap 3 is located on the outside of the gas cylinder 1 and covers the port of the air guide tube 2, and the rotating plate 5 is located inside the gas cylinder 1 and is located in the other port of the air guide tube 2. Corresponding to the rotating plate 5, a spacer 7 is provided on the air guide tube 2 to fit with it, and the spacer 7 and the rotating plate 5 are provided with staggered through holes, and a bag cover 8 is slidably installed on the guide rod 6 between the twist cap 3 and the rotating plate 5, and a plurality of elastic bands 10 are provided between the bag cover 8 and the guide rod 6 for connection, and an inner tube 9 is also provided in the air guide tube 2, and the bag cover 8 fits the inner wall of the inner tube 9, and a plurality of through holes are provided on the inner tube 9;

[0024] The motor control module includes a motor for driving the spacer 7 to rotate.

[0025] The detection device is placed in an insulating cabinet as a whole. The pressure of SF6 in the cabinet is detected by the pressure monitoring sensor. When the pressure in the cabinet is detected to be reduced, the signal is transmitted to the motor control module and the external data acquisition terminal through the wireless transmission module.

[0026] The motor control module drives the spacer 7 to rotate through the gear, and the through hole on the spacer 7 rotates to a state of being in contact with the through hole on the rotating plate 5. The high-pressure SF6 in the gas cylinder 1 is ejected from the through hole, pushing the bag cover 8 to slide along the guide rod 6. During the initial jetting, the thrust of the gas on the bag cover 8 is greater, which will push the bag cover 8 more into the inner tube 9. As the jetting progresses, the gas in the gas cylinder 1 decreases, and the thrust of the gas on the bag cover 8 gradually decreases. Due to the action of the elastic band 10, the bag cover 8 cannot go deeper into the inner tube 9.

[0027] As the insertion depth of the bladder cover 8 into the inner tube 9 changes, the deeper the insertion, the shorter the length of the through hole on the inner tube 9, and the shallower the insertion, the longer the length of the through hole on the inner tube 9. That is, when the gas cylinder 1 initially sprays gas, the gas pressure in the gas cylinder 1 is high, and the gas flow directly passing through the through holes on the rotating plate 5 and the spacer 7 is high, but the through holes on the inner tube 9 are affected by the bladder cover 8, and the path through which the gas can pass is narrow, and the gas flow rate of the sprayed gas is limited. As the spraying proceeds, the gas pressure in the gas cylinder 1 decreases, and the gas flow directly passing through the through holes on the rotating plate 5 and the spacer 7 decreases. At the same time, the through holes on the inner tube 9 are affected by the bladder cover 8, and the path through which the gas can pass becomes wider, and the restriction on the sprayed gas is reduced, so that the spraying amount is always kept in a balanced state during the process from the initial spraying to the final spraying.

[0028] When a gas leak is detected in the cabinet, gas is added to the cabinet. The more gas is added per unit time, the more serious the leakage will be. Maintaining a balanced gas replenishment state can extend the service life of the gas cylinder and also allow the leaking cabinet to maintain a longer safe use period.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

Claims

1. A SF6 wireless gas detection device, comprising a gas storage cylinder (1), characterized in that: The gas cylinder (1) contains high-pressure SF6 gas. An integrated box (4) integrating a plurality of monitoring modules is provided on the surface of the gas cylinder (1). A gas guide tube (2) is provided at the top of the gas cylinder (1). An inner tube (9) is provided in the gas guide tube (2). The inner tube (9) is elastically connected to the gas guide tube (2). A bladder cover (8) having an inner diameter the same as that of the inner tube (9) is provided in the gas guide tube (2). A plurality of through holes are provided on the bladder cover (8). The inner tube (9) slides inside the bladder cover (8).

2. The SF6 wireless gas detection device according to claim 1, characterized in that: A guide rod (6) is provided at the center of the air guide tube (2), and a twist cap (3) and a rotating plate (5) are provided at both ends of the guide rod (6), the twist cap (3) is located outside the gas storage bottle (1) and covers the end of the air guide tube (2), and the rotating plate (5) is located inside the gas storage bottle (1) and is located in the other end of the air guide tube (2).

3. The SF6 wireless gas detection device according to claim 2 is characterized in that: A spacer (7) that fits the rotating plate (5) is provided inside the air guide tube (2), and staggered through holes are provided on the rotating plate (5) and the spacer (7).

4. The SF6 wireless gas detection device according to claim 1, characterized in that: The inner tube (9) is slidably mounted on the guide rod (6), and a plurality of elastic bands (10) are provided on the inner tube (9) and connected to the spacer (7).

5. The SF6 wireless gas detection device according to claim 1, characterized in that: The top end of the inner tube (9) is sealedly connected to the inner wall of (2), and the through hole on the inner tube (9) is opened from the inside of (1) to the outside.

6. The SF6 wireless gas detection device according to claim 1, characterized in that: The integrated box (4) comprises a built-in air pressure monitoring sensor, a wireless transmission module, an induction power collection coil for supplying power to the two, and an external data acquisition terminal.

7. The SF6 wireless gas detection device according to claim 6, characterized in that: The wireless transmission module transmits air pressure signals to a data acquisition terminal arranged outside. A motor control module for driving the spacer (7) to rotate is also arranged in the air guide tube (2). The wireless transmission module and the motor control module are also connected via wireless signals.

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