Gas monitoring valve group of ring net cabinet

Abstract

The utility model relates to gas monitoring technical field discloses a kind of gas monitoring valve groups of ring main unit, including support frame, the support frame surface is fixedly connected with protective housing, calibrating instrument and vacuum chamber are installed in the protective housing inner wall, the vacuum chamber top is fixedly connected with transition gas pipe, the transition gas pipe inboard is fixedly connected with air inlet pipe, the support frame inboard surface is fixedly connected with side plate, the side plate top inboard is fixedly connected with top cover, ring main unit gas tank is installed in the side plate inner wall, the side plate top surface is fixedly connected with one-way valve, the one-way valve inboard is screw-connected with air outlet pipe. In the utility model, by opening manual ball valve, ring main unit gas tank internal gas is monitored by being introduced into density relay, by vacuum chamber, temporary storage space is provided for leakage gas and gas to be supplemented, the integrated design of gas monitoring and filling is realized, and the gas leakage risk caused by dispersed connection is reduced.

Description

Technical Field

[0001] This utility model relates to the field of gas monitoring technology, and in particular to a gas monitoring valve group for a ring main unit. Background Technology

[0002] As a closed or semi-closed power distribution device, the ring main unit contains high-voltage live components. It is usually necessary to isolate the live parts from the grounded parts and live parts of different phases through insulating media to prevent short circuits or breakdown faults. The inside of the ring main unit is usually filled with an insulating gas such as sulfur hexafluoride to quickly absorb arc energy and cool it, so as to prevent the arc from burning and damaging the equipment. In order to avoid equipment insulation failure, short circuit faults or reduced arc extinguishing ability due to insufficient gas, gas monitoring equipment is usually used to monitor the status of the insulating gas inside the ring main unit, so as to detect abnormalities such as gas leakage in time and reduce the risk of power distribution system failure.

[0003] In existing gas monitoring equipment, the gas monitoring path and processing device are mostly connected in a decentralized manner, and there is a lack of integrated design between the components. During the gas transmission process, it needs to pass through multiple independent interfaces, which can easily lead to an increased risk of leakage due to insufficient connection sealing. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a gas monitoring valve group for a ring main unit, which aims to improve the problem of high gas leakage risk caused by the dispersed gas monitoring and treatment paths in the existing technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gas monitoring valve assembly for a ring main unit, comprising a support frame, a protective shell fixedly connected to the surface of the support frame, a calibrator and a vacuum chamber installed on the inner wall of the protective shell, a transition gas pipe fixedly connected to the top of the vacuum chamber, an inlet pipe fixedly connected to the inner side of the transition gas pipe, a side plate fixedly connected to the inner surface of the support frame, a top cover fixedly connected to the inner top of the side plate, a ring main unit gas box installed on the inner wall of the side plate, a one-way valve fixedly connected to the top surface of the side plate, an outlet pipe threadedly connected to the inner side of the one-way valve, a measuring gas pipe fixedly connected to the other side of the one-way valve, a density relay fixedly connected to the bottom end of the measuring gas pipe, and a connecting mechanism provided on one side of the protective shell;

[0006] The above technical solution uses a vacuum chamber to temporarily store auxiliary gas, avoiding the impact of direct gas emission or dispersed processing.

[0007] Preferably, the monitoring valve assembly further includes a connecting strip, the inner wall of the connecting strip is fitted with the top surface of the side plate, the inner wall of the connecting strip is provided with a guide hole, the inner wall of the guide hole is fitted with a guide post, and the guide post is fixedly connected to the support frame;

[0008] The above technical solution reduces the possibility of misalignment during direct docking by utilizing the connecting strip.

[0009] Preferably, the connecting mechanism includes a fixing tube, the outer wall of the fixing tube is fixedly connected to the inner wall of the protective shell, an elastic filling layer is fixedly connected to the inner wall of the fixing tube, a conical sealing ring is attached to the inner wall of the elastic filling layer, and a connecting air tube is attached to the inner wall of the conical sealing ring.

[0010] The above technical solution involves the following: when the pipe is inserted, it will compress the elastic filling layer, causing it to generate elastic potential energy. This elastic potential energy will then react on the conical sealing ring, achieving initial fixation of the pipe and facilitating further reinforcement and fixation of the connection using connectors.

[0011] Preferably, the connecting gas pipe is fixedly connected to the vacuum chamber, and a connecting pipe is installed on one side of the vacuum chamber.

[0012] Preferably, a filter screen is installed on the inner wall of the air outlet pipe, and the filter screen is used to filter the gas inside the gas box of the ring main unit.

[0013] Preferably, a manual ball valve is installed on one side of the top of the ring main unit's gas box, and the manual ball valve is threadedly connected to the gas outlet pipe. A check valve is installed on the other side of the top of the ring main unit's gas box, and the check valve is threadedly connected to the gas inlet pipe.

[0014] Preferably, a connecting frame is mounted on the surface of the support frame, the surface of the connecting frame is in contact with the bottom surface of the density relay, a vent pipe is mounted on the bottom surface of the density relay, and the bottom end of the vent pipe is fixedly connected to the calibrator.

[0015] Preferably, the calibrator is equipped with a display screen, which is fixedly connected to the outer surface of the protective housing.

[0016] This utility model has the following beneficial effects:

[0017] 1. In this utility model, the gas inside the ring main unit's gas box is introduced into the density relay for monitoring by opening the manual ball valve, and the vacuum chamber provides temporary storage space for leaked gas and gas to be replenished, thus realizing the integrated design of gas monitoring and filling and reducing the risk of gas leakage caused by decentralized connections.

[0018] 2. In this utility model, when the fixed pipe connects pipes of different sizes to different devices, it can achieve initial positioning through the tapered surface of the conical sealing ring, and the fixed pipe can quickly guide and position pipes of different sizes through the elastic filling layer. Attached Figure Description

[0019] Figure 1This is a three-dimensional structural diagram of a gas monitoring valve assembly for a ring main unit proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of the explosion of the top cover of the gas monitoring valve group of a ring main unit proposed in this utility model;

[0021] Figure 3 This is a cross-sectional schematic diagram of a gas monitoring valve assembly for a ring main unit proposed in this utility model;

[0022] Figure 4 This is a schematic diagram of the support frame connection for the gas monitoring valve group of a ring main unit proposed in this utility model;

[0023] Figure 5 This is a schematic diagram of the connecting strip of the gas monitoring valve group of a ring main unit proposed in this utility model.

[0024] Legend:

[0025] 1. Support frame; 2. Top cover; 3. Side plate; 4. Ring main unit air box; 5. Outlet pipe; 6. Inlet pipe; 7. One-way valve; 8. Measuring pipe; 9. Transition pipe; 10. Density relay; 11. Protective housing; 12. Calibrator; 13. Vacuum chamber; 14. Connecting pipe; 15. Conical sealing ring; 16. Elastic filling layer; 17. Fixing pipe; 18. Connecting pipe; 19. Filter screen; 20. Connecting strip; 21. Guide column. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0027] Reference Figures 1-2 An embodiment of this utility model provides a gas monitoring valve group for a ring main unit, including a support frame 1, a protective shell 11 fixedly connected to the surface of the support frame 1, a calibrator 12 and a vacuum chamber 13 installed on the inner wall of the protective shell 11, a transition gas pipe 9 fixedly connected to the top of the vacuum chamber 13, an inlet pipe 6 fixedly connected to the inner side of the transition gas pipe 9, a side plate 3 fixedly connected to the inner surface of the support frame 1, a top cover 2 fixedly connected to the inner top of the side plate 3, a ring main unit gas box 4 installed on the inner wall of the side plate 3, a one-way valve 7 fixedly connected to the top surface of the side plate 3, an outlet pipe 5 threadedly connected to the inner side of the one-way valve 7, a measuring gas pipe 8 fixedly connected to the other side of the one-way valve 7, a density relay 10 fixedly connected to the bottom end of the measuring gas pipe 8, and a connecting mechanism provided on one side of the protective shell 11;

[0028] Specifically, the calibrator 12 is electrically connected to the density relay 10. The calibrator 12 can receive the monitoring information of the density relay 10. When monitoring is performed using the monitoring valve group, the manual ball valve is opened. The gas in the ring network cabinet gas box 4 is filtered through the internal filter screen 19 of the gas outlet pipe 5 to remove any possible impurities. Then, it enters the measuring gas pipe 8 through the one-way valve 7. The one-way valve 7 can prevent gas backflow. After that, the gas flows into the density relay 10 for monitoring.

[0029] When a slight leak occurs in the gas box 4 of the ring main unit, the calibrator 12 triggers the valve inside the connecting pipe 18 to open. The gas in the gas box enters the vacuum chamber 13 through the connecting pipe 18 for temporary storage, and then is transported to the external gas treatment device through the connecting pipe 14 and the fixed pipe 17.

[0030] When gas needs to be replenished after maintenance of the ring main unit gas box 4 is completed, the gas replenishment bottle is connected through the fixed pipe 17, the vacuum chamber 13 draws the gas to be replenished into the interior, and the transition gas pipe 9 and the inlet pipe 6 inject the gas to be replenished into the ring main unit gas box 4, thereby reducing the possibility of leakage during gas transmission.

[0031] Reference Figure 3 The connecting mechanism includes a fixed tube 17, the outer wall of the fixed tube 17 is fixedly connected to the inner wall of the protective shell 11, an elastic filling layer 16 is fixedly connected to the inner wall of the fixed tube 17, a conical sealing ring 15 is attached to the inner wall of the elastic filling layer 16, and a connecting air tube 14 is attached to the inner wall of the conical sealing ring 15.

[0032] Specifically, when the fixed pipe 17 needs to connect pipes of different sizes to different devices, the pipe with a smaller diameter will contact the narrower part of the inner side of the conical sealing ring 15; the pipe with a larger diameter will contact the wider part of the outer side of the conical sealing ring 15. Thus, the tapered surface of the conical sealing ring 15 is used to initially limit the pipe and prevent the pipe from radially shifting during the connection process.

[0033] Reference Figure 3 The gas pipe 14 is fixedly connected to the vacuum chamber 13, and a connecting pipe 18 is installed on one side of the vacuum chamber 13.

[0034] Specifically, when a slight leak is detected in the ring main unit's gas box 4, the internal valve of the connecting pipe 18 is opened by the calibrator 12, allowing the gas in the gas box to flow into the vacuum chamber 13 for temporary storage or subsequent processing; under gas monitoring conditions, the internal valve of the connecting pipe 18 remains closed to prevent gas exchange from affecting gas monitoring.

[0035] Reference Figure 4 The inner wall of the exhaust pipe 5 is equipped with a filter screen 19, which is used to filter the gas inside the ring main unit gas box 4.

[0036] Specifically, when the gas in the ring main unit's gas box 4 flows out through the gas outlet pipe 5, it first passes through the filter screen 19. The filter screen 19 can intercept any small particles or residual impurities that may be present in the gas, keeping the gas entering the subsequent pipeline clean. The gas outlet pipe 5 is fixed by threaded connection at both ends. When a certain amount of impurities accumulate on the surface of the filter screen 19, the operator can quickly remove the gas outlet pipe 5 to clean or replace the internal filter screen 19.

[0037] Reference Figures 1-2 A manual ball valve is installed on one side of the top of the ring main unit air box 4. The manual ball valve is threadedly connected to the air outlet pipe 5. A check valve is installed on the other side of the top of the ring main unit air box 4. The check valve is threadedly connected to the air inlet pipe 6.

[0038] Specifically, when it is necessary to monitor the gas inside the gas box, opening the manual ball valve allows the gas inside the gas box to flow out through the gas outlet pipe 5 for monitoring. When gas is added to the gas box through the gas inlet pipe 6, the check valve is opened to allow the gas to be added to flow along the gas inlet pipe 6 to the ring main unit gas box 4. The manual ball valve and the check valve effectively maintain the stability of the gas pressure inside the ring main unit gas box 4.

[0039] Reference Figure 3 A connecting frame is installed on the surface of the support frame 1. The surface of the connecting frame is in contact with the bottom surface of the density relay 10. A vent pipe is installed on the bottom surface of the density relay 10. The bottom end of the vent pipe is fixedly connected to the calibrator 12.

[0040] Specifically, by attaching the connecting frame to the bottom surface of the density relay 10, the weight of the density relay 10 can be evenly distributed on the connecting frame, and then transferred to the support frame 1 through the connecting frame. This reduces the tilting or displacement that the density relay 10 may cause due to single-point force, ensuring that the density relay 10 remains in a stable position. When a slight leak is detected through the vent pipe, the gas flows through the density relay 10 and enters the calibrator 12 for further processing.

[0041] Reference Figure 3 The calibrator 12 is equipped with a display screen, which is fixedly connected to the outer surface of the protective housing 11.

[0042] Specifically, by exposing the display screen to the surface of the protective housing 11, the display screen is stably attached to the surface of the protective housing 11 and is not easily displaced by equipment vibration or external touch. This ensures that the display screen remains stable during long-term use, and the display screen can be directly observed without opening the housing, providing convenience for operators to obtain information. Example

[0043] Reference Figures 4-5The monitoring valve assembly also includes a connecting strip 20, the inner wall of the connecting strip 20 is attached to the top surface of the side plate 3, a guide hole is provided on the inner wall of the connecting strip 20, a guide post 21 is attached to the inner wall of the guide hole, and the guide post 21 is fixedly connected to the support frame 1.

[0044] Specifically, the guide post 21 is attached to the guide hole and fixed to the support frame 1, so that the connecting strip 20 can move and adjust along the extension direction of the guide post 21. The connecting strip 20 assists the support frame 1 in positioning and attaching to the side plate 3. Then, the support frame 1 and the side plate 3 are connected by fixing bolts to fix the support frame 1.

[0045] Working principle: A manual ball valve is installed on the top of the top cover 2 to control the gas flow inside the ring main unit gas box 4. When it is necessary to monitor the gas inside the ring main unit gas box 4, one end of the gas outlet pipe 5 is connected to the manual ball valve, and the other end is connected to the measuring gas pipe 8 through the one-way valve 7. This allows the gas inside the ring main unit gas box 4 to be fed into the density relay 10 for monitoring. When a slight leak is detected in the ring main unit gas box 4, the valve inside the connecting pipe 18 is opened by the calibrator 12, thereby sending the gas inside the ring main unit gas box 4 into the vacuum chamber 13. The gas is then connected to the gas treatment device through the fixed pipe 17 for waste gas treatment, so that the vacuum chamber 13 is restored to a vacuum state.

[0046] After maintaining the ring main unit gas box 4 to restore it to a sealed state, it is connected to the gas replenishment cylinder through the fixed pipe 17. The vacuum chamber 13 draws the gas to be replenished into the interior, and then sends the gas into the ring main unit gas box 4 through the transition gas pipe 9, thereby reducing the risk of leakage during gas monitoring and filling.

[0047] Because the fixed pipe 17 is equipped with a conical sealing ring 15 inside, and the space between the conical sealing ring 15 and the fixed pipe 17 is filled with an elastic filling layer 16, when the fixed pipe 17 is connected to pipes of different sizes of different devices, the tapered surface of the conical sealing ring 15 achieves initial positioning, and the elastic filling layer 16 is further fixed by the elastic potential energy generated by external force, so that the fixed pipe 17 can quickly guide and position pipes of different sizes.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas monitoring valve assembly for a ring main unit, comprising a support frame (1), characterized in that: The support frame (1) is fixedly connected to a protective shell (11). A calibrator (12) and a vacuum chamber (13) are installed on the inner wall of the protective shell (11). A transition gas pipe (9) is fixedly connected to the top of the vacuum chamber (13). An air inlet pipe (6) is fixedly connected to the inner side of the transition gas pipe (9). A side plate (3) is fixedly connected to the inner surface of the support frame (1). A top cover (2) is fixedly connected to the inner side of the top of the side plate (3). A ring network cabinet air box (4) is installed on the inner wall of the side plate (3). A one-way valve (7) is fixedly connected to the top surface of the side plate (3). An air outlet pipe (5) is threadedly connected to the inner side of the one-way valve (7). A measuring gas pipe (8) is fixedly connected to the other side of the one-way valve (7). A density relay (10) is fixedly connected to the bottom end of the measuring gas pipe (8). A connecting mechanism is provided on one side of the protective shell (11).

2. The gas monitoring valve assembly of a ring main unit according to claim 1, characterized in that: The monitoring valve assembly also includes a connecting strip (20), the inner wall of the connecting strip (20) is attached to the top surface of the side plate (3), the inner wall of the connecting strip (20) is provided with a guide hole, the inner wall of the guide hole is attached with a guide post (21), and the guide post (21) is fixedly connected to the support frame (1).

3. The gas monitoring valve assembly of a ring main unit according to claim 1, characterized in that: The connecting mechanism includes a fixed tube (17), the outer wall of the fixed tube (17) is fixedly connected to the inner wall of the protective shell (11), the inner wall of the fixed tube (17) is fixedly connected to an elastic filling layer (16), the inner wall of the elastic filling layer (16) is fitted with a conical sealing ring (15), and the inner wall of the conical sealing ring (15) is fitted with a connecting air tube (14).

4. The gas monitoring valve assembly of a ring main unit according to claim 3, characterized in that: The connecting air pipe (14) is fixedly connected to the vacuum chamber (13), and a connecting pipe (18) is installed on one side of the vacuum chamber (13).

5. The gas monitoring valve assembly of a ring main unit according to claim 1, characterized in that: The inner wall of the outlet pipe (5) is equipped with a filter screen (19), which is used to filter the gas inside the ring network cabinet gas box (4).

6. The gas monitoring valve assembly of a ring main unit according to claim 1, characterized in that: A manual ball valve is installed on one side of the top of the ring main unit air box (4), and the manual ball valve is threadedly connected to the air outlet pipe (5). A check valve is installed on the other side of the top of the ring main unit air box (4), and the check valve is threadedly connected to the air inlet pipe (6).

7. The gas monitoring valve assembly of a ring main unit according to claim 1, characterized in that: A connecting frame is installed on the surface of the support frame (1), and the surface of the connecting frame is in contact with the bottom surface of the density relay (10). A vent pipe is installed on the bottom surface of the density relay (10), and the bottom end of the vent pipe is fixedly connected to the calibrator (12).

8. The gas monitoring valve assembly of a ring main unit according to claim 1, characterized in that: The calibrator (12) is equipped with a display screen, which is fixedly connected to the outer surface of the protective shell (11).

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