A portable gas relay heavy gas inspection method
Through the portable gas relay heavy gas inspection method, the oil cylinder and spring chamber provide continuous thrust, and the control panel and display are combined to achieve automatic inspection, which solves the problems of slow on-site inspection speed and large equipment size, reduces the inspection cost and is suitable for market popularization.
Patent Information
- Application Number
- CN201811211177.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2018-10-17
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2038-10-17
AI Technical Summary
In the prior art, the on-site inspection of gas relays has problems such as slow speed, large equipment size, troublesome operation and inability to automatically complete heavy gas verification, resulting in high testing costs and is not conducive to the popularization of the market.
A portable gas relay heavy gas inspection method is designed, including components such as oil tank, gas relay, control board, liquid extraction pump, pressure sensor and reversing valve, providing continuous thrust through the oil cylinder and spring chamber, and combining the control board and display to achieve automation. Detection, using Bernoulli equation and table lookup method to calculate flow velocity and pressure relationships, simplifying operation and reducing additional friction effects.
It realizes fast and automated heavy gas inspection, the equipment is small in size and light in weight, reduces the inspection cost, is suitable for popularization and promotion, and is convenient for data display and operation control through the display screen.
Smart Images
Figure CN109406994B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of heavy gas inspection, and in particular provides a portable gas relay heavy gas inspection method. Background Art
[0002] Gas relay, also known as gas relay, is a component that uses the hot oil flow and hot air flow generated when the transformer fails to drive the relay to operate. It is a protective component of the transformer. It is installed on the connecting pipe between the transformer cover and the oil storage cabinet. Under the action of the gas or oil flow generated by the internal fault of the transformer, it connects the signal or trip circuit, so that the relevant device sends an alarm signal or cuts off the transformer from the power grid, thereby protecting the transformer. Since gas relays are used as the main protection of oil-immersed transformers in oil-immersed transformers, they play a key role in the safe operation of transformers. Relevant inspection standards have been introduced one after another. Therefore, how to accurately inspect gas relays, especially on-site inspections, is of great significance to improving the working efficiency of power supply systems.
[0003] At present, the existing on-site gas relay heavy gas inspection is slow, the inspection equipment is large, the operation is cumbersome, and the heavy gas inspection cannot be completed automatically. At the same time, it is inconvenient to transport and the cost of each inspection is high, which is not conducive to market popularization. Therefore, those skilled in the art provide a portable gas relay heavy gas inspection method to solve the problems raised in the above background technology. Summary of the invention
[0004] The object of the present invention is to provide a portable gas relay heavy gas inspection method to solve the problems raised in the above background technology.
[0005] To achieve the above object, the present invention provides the following technical solutions:
[0006] A portable gas relay heavy gas inspection method device comprises a fuel tank, a gas relay and a control panel, wherein the middle part of the fuel tank is connected to a reversing valve through a pipeline, the left side of the fuel tank is connected to a liquid pump through a pipeline, the liquid pump is connected to the left side of a fuel cylinder through a first fuel pipe, a one-way valve is arranged near the liquid pump on the first fuel pipe, a proportional valve is arranged on the upper side of the one-way valve on the first fuel pipe, a relief valve is arranged on the upper side of the proportional valve on the first fuel pipe, a reversing valve is arranged on the upper side of the relief valve on the first fuel pipe, a pressure sensor is arranged on the upper side of the reversing valve on the first fuel pipe, the reversing valve is connected to the right side of the fuel cylinder through a second fuel pipe, the fuel cylinder is connected to the left side of a spring chamber through a push rod, a baffle is arranged inside the gas relay, the baffle is connected to the right side of the spring chamber through a push rod, and the control panel is electrically connected to the gas relay, the pressure sensor, the reversing valve, the proportional valve and the liquid pump.
[0007] As a further solution of the present invention: the material of the oil cylinder is stainless steel.
[0008] As a further solution of the present invention: the control panel includes a display, a main board and an operation panel.
[0009] As a further solution of the present invention: the model of the control board is AT89S52, and the model of the pressure sensor is MIK-P300.
[0010] A portable gas relay heavy gas inspection method, the method comprising the following steps:
[0011] 1) The staff first places the gas relay on the operating table as required, connects and installs each device, and then conducts the test after checking that everything is correct.
[0012] 2) First, press the operation panel on the control panel to start the test. The main board starts the pumping pump and controls the reversing valve. The oil enters the oil cylinder through the one-way valve, proportional valve, relief valve, reversing valve and the first oil pipe to push the oil cylinder forward. At this time, the main board simultaneously detects the pressure of the pressure sensor and converts the pressure into a thrust acting on the relay baffle. The function of the proportional valve is to control the oil pressure and change the thrust acting on the relay baffle by changing the oil pressure. During the operation of the gas relay, the gas relay is displaced by the impact of the oil flow. When the heavy gas of the gas relay is actuated, a large displacement will be generated. At this time, the oil cylinder cannot provide the displacement to generate subsequent thrust. Through the spring chamber, continuous thrust can be provided after the heavy gas signal is actuated. At the same time, the heavy gas signal of the gas relay is detected. When the heavy gas signal is detected, the thrust converted from the previous pressure value is taken and converted into a flow rate as the heavy gas value, and the thrust value and the heavy gas flow rate value are displayed on the display. Finally, the main control board automatically controls the reversing valve to make the oil cylinder move in the opposite direction and move to the bottom position.
[0013] 3) Then, the test data is observed and recorded, and the results are calculated by comparing with the pressure and flow rate conversion table; and according to the Bernoulli equation, it can be concluded that when the fluid flows horizontally, in the flow of the fluid, the pressure is related to the flow rate, and the pressure p is small where the flow rate V is large, and the pressure p is large where the flow rate V is small; therefore, applying different forces to the baffle by pushing the baffle is equivalent to changing the flow rate; in the present invention, in order to avoid the influence of additional friction on the test results, all data are converted into flow rate by using the table lookup method through the corresponding relationship between the actual measurement pressure and flow rate.
[0014] 4) Close the test through the operation panel, disassemble, clean and properly store each component, and the entire verification is completed.
[0015] Compared with the prior art, the advantages of the present invention are:
[0016] 1. This method solves the current problems of slow heavy gas inspection of on-site gas relays, large size of the inspection equipment, and cumbersome operation.
[0017] 2. The present invention is easy to operate and can quickly and automatically complete the calibration of heavy gas. The equipment is small in size and light in weight, which reduces the cost of inspection and is suitable for popularization and promotion.
[0018] 3. Data can be conveniently displayed through the display screen, and control and adjustment can be conveniently performed through the operation panel. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The present invention is further described in detail below with reference to the accompanying drawings and embodiments:
[0020] Figure 1 This is the structural diagram of the detection model.
[0021] Figure 2 This is a pressure and flow rate conversion table.
[0022] In the figure: 1-oil tank, 2-liquid pump, 3-check valve, 4-proportional valve, 5-overflow valve, 6-reversing valve, 7-oil cylinder, 8-first oil pipe, 9-second oil pipe, 10-spring chamber, 11-gas relay, 12-pressure sensor, 13-control board. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0024] See also Figures 1-2 In an embodiment of the present invention, a portable gas relay heavy gas inspection method device includes an oil tank 1, a gas relay 11 and a control panel 13. The middle part of the oil tank 1 is connected to a reversing valve 6 through a pipeline. The left side of the oil tank 1 is connected to a liquid pump 2 through a pipeline. The liquid pump 2 is connected to the left side of a cylinder 7 through a first oil pipe 8. A check valve 3 is provided near the first oil pipe 8 near the liquid pump 2. A proportional valve 4 is provided on the upper side of the first oil pipe 8. The first oil pipe 8 is located on the upper side of the proportional valve 4. An overflow valve 5 is provided, a reversing valve 6 is provided on the upper side of the overflow valve 5 on the first oil pipe 8, a pressure sensor 12 is provided on the upper side of the reversing valve 6 on the first oil pipe 8, the reversing valve 6 is connected to the right side of the oil cylinder 7 through the second oil pipe 9, the oil cylinder 7 is connected to the left side of the spring chamber 10 through a push rod, a baffle is provided inside the gas relay 11, the baffle is connected to the right side of the spring chamber 10 through a push rod, and the control board 13 is electrically connected to the gas relay 11, the pressure sensor 12, the reversing valve 6, the proportional valve 4 and the liquid pump 2.
[0025] The material of the oil cylinder 7 is stainless steel.
[0026] The control panel 13 includes a display, a main board and an operation panel.
[0027] The model of the control board 13 is AT89S52, and the model of the pressure sensor is MIK-P300.
[0028] A portable gas relay heavy gas inspection method, the method comprising the following steps:
[0029] 1) The staff first places the gas relay 11 on the operating table as required, and completes the connection and installation of various devices. After checking that everything is correct, the test is carried out.
[0030] 2) First, press the operation panel on the control panel 13 to start the test. The main board starts the liquid pump 2 and controls the reversing valve 6. The oil enters the oil cylinder 7 through the one-way valve 3, the proportional valve 4, the relief valve 5, the reversing valve 6 and the first oil pipe 8 to push the oil cylinder 7 forward. At this time, the main board simultaneously detects the pressure of the pressure sensor 12 and converts the pressure into a thrust acting on the relay baffle. The function of the proportional valve 4 is to control the oil pressure and change the thrust acting on the relay baffle by changing the oil pressure. During the operation of the gas relay 11, the impact force of the oil flow is generated. Displacement. When the gas relay 11 heavy gas is actuated, a large displacement will be generated. At this time, the oil cylinder 7 cannot provide the displacement to generate subsequent thrust. Through the spring chamber 10, continuous thrust can be provided after the heavy gas signal is actuated. At the same time, the heavy gas signal of the gas relay 11 is detected. When the heavy gas signal is detected, the thrust converted from the previous pressure value is taken and converted into a flow rate as the heavy gas value, and the thrust value and the heavy gas flow rate value are displayed on the display. Finally, the main control board automatically controls the reversing valve 6 to make the oil cylinder move in the opposite direction and move to the bottom position.
[0031] 3) Then, the test data is observed and recorded, and the results are calculated by comparing with the pressure and flow rate conversion table; and according to the Bernoulli equation, it can be concluded that when the fluid flows horizontally, in the flow of the fluid, the pressure is related to the flow rate, and the pressure p is small where the flow rate V is large, and the pressure p is large where the flow rate V is small; therefore, applying different forces to the baffle by pushing the baffle is equivalent to changing the flow rate; in the present invention, in order to avoid the influence of additional friction on the test results, all data are converted into flow rate by using the table lookup method through the corresponding relationship between the actual measurement pressure and flow rate.
[0032] 4) Close the test through the operation panel, disassemble, clean and properly store each component, and the entire verification is completed.
[0033] It will be apparent to those skilled in the art that the 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 the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.
[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A portable gas relay heavy gas inspection method, characterized in that: The following steps are involved: 1) The staff first places the gas relay (11) on the operating table as required, and completes the connection and installation of various devices. After checking that everything is correct, the test is carried out; 2) First, press the operation panel on the control panel (13) to start the test. The main board starts the liquid pump (2) and controls the reversing valve (6). The oil enters the oil cylinder (7) through the one-way valve (3), the proportional valve (4), the relief valve (5), the reversing valve (6) and the first oil pipe (8) to push the oil cylinder (7) forward. At this time, the main board simultaneously detects the pressure of the pressure sensor (12) and converts the pressure into a thrust acting on the relay baffle. The function of the proportional valve (4) is to control the oil pressure and change the thrust acting on the relay baffle by changing the oil pressure. During the operation of the gas relay (11), The impact force of the oil flow generates displacement. When the heavy gas of the gas relay (11) is actuated, a large displacement will be generated. At this time, the oil cylinder (7) cannot provide the displacement to generate subsequent thrust. Through the spring chamber (10), continuous thrust can be provided after the heavy gas signal is actuated. At the same time, the heavy gas signal of the gas relay (11) is detected. When the heavy gas signal is detected, the thrust converted from the previous pressure value is taken and converted into a flow rate as the heavy gas value, and the thrust value and the heavy gas flow rate value are displayed on the display. Finally, the main control board automatically controls the reversing valve (6) to make the oil cylinder move in the reverse direction and move to the bottom position. 3) Then, the test data is observed and recorded, and the results are calculated by comparing with the pressure and flow rate conversion table; and according to the Bernoulli equation, it can be concluded that when the fluid flows horizontally, in the flow of the fluid, the pressure is related to the flow rate, and the pressure p is small where the flow rate V is large, and the pressure p is large where the flow rate V is small; therefore, applying different forces to the baffle by pushing the baffle is equivalent to changing the flow rate; in the present invention, in order to avoid the influence of additional friction on the test results, all data are converted into flow rate by using the table lookup method through the corresponding relationship between the actual measured pressure and flow rate; 4) Close the test through the operation panel, disassemble, clean and properly store each component, and the entire verification is completed; The device of the method comprises an oil tank (1), a gas relay (11) and a control panel (13), characterized in that the middle of the oil tank (1) is connected to a reversing valve (6) via a pipeline, the left side of the oil tank (1) is connected to a liquid pump (2) via a pipeline, the liquid pump (2) is connected to the left side of a cylinder (7) via a first oil pipe (8), a one-way valve (3) is arranged near the liquid pump (2) on the first oil pipe (8), a proportional valve (4) is arranged on the upper side of the one-way valve (3) on the first oil pipe (8), and a relief valve (5) is arranged on the upper side of the proportional valve (4) on the first oil pipe (8), The first oil pipe (8) is provided with a reversing valve (6) located on the upper side of the overflow valve (5); the first oil pipe (8) is provided with a pressure sensor (12) located on the upper side of the reversing valve (6); the reversing valve (6) is connected to the right side of the oil cylinder (7) through the second oil pipe (9); the oil cylinder (7) is connected to the left side of the spring chamber (10) through a push rod; a baffle is provided inside the gas relay (11); the baffle is connected to the right side of the spring chamber (10) through the push rod; and the control panel (13) is electrically connected to the gas relay (11), the pressure sensor (12), the reversing valve (6), the proportional valve (4) and the liquid pump (2).
2. A portable gas relay heavy gas inspection method according to claim 1, characterized in that: The material of the oil cylinder (7) is stainless steel.
3. A portable gas relay heavy gas inspection method according to claim 1, characterized in that: The control panel (13) comprises a display, a main board and an operation panel.
4. A portable gas relay heavy gas inspection method according to claim 1, characterized in that: The model of the control board (13) is AT89S52, and the model of the pressure sensor is MIK-P300.