Intelligent maintenance-free respirator and heating control method thereof

Abstract

The application provides a kind of intelligent maintenance-free respirator and its heating control method, it is related to respirator technical field.The intelligent maintenance-free respirator provided by the application, including connecting flange, visible silica gel observation barrel, upper end plate, sensor control box, silica gel heating device, silica gel filter barrel, shell glass, lower sealing plate, electromagnetic valve, liquid seal cup, humidity and differential pressure sensor;Connecting flange one end connects transformer oil conservator, the other end connects visible silica gel observation barrel, visible silica gel observation barrel other end and upper end plate top surface are connected, upper end plate side surface is connected with sensor control box, the center of upper end plate bottom surface is provided with silica gel heating device, silica gel heating device is wrapped and installed in silica gel filter barrel, shell glass upper and lower ports are respectively sealed with the circumferential edge of upper end plate and lower sealing plate Connection, the outer layer of silica gel filter barrel, electromagnetic valve is installed on the side surface of lower sealing plate, and liquid seal cup is installed on the bottom of lower sealing plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of respirator technology, in particular to an intelligent maintenance-free respirator and a heating control method thereof. BACKGROUND

[0002] The oil conservator is one of the important components of the power transformer. The respirator connected to the oil conservator filters out the water molecules in the air, so that the water molecules cannot be accumulated in the oil conservator. However, the respirator is always in a breathing state, and the silica gel in the respirator will inevitably be saturated in the long-term breathing process, so that the water molecules enter the oil conservator. Therefore, the regular replacement of the silica gel in the respirator has become a regular maintenance work, and the silica gel needs to be replaced at a certain time interval. A large amount of manpower and material resources are wasted. Therefore, the technology of heating the silica gel to reduce the silica gel has been widely used in recent years. However, the existing technology directly heats in the silica gel tank of the respirator, and the water vapor generated in the drying and heating process of the silica gel enters the inside of the oil conservator, which brings risks and hidden dangers to the transformer. SUMMARY

[0003] In view of the deficiencies of the prior art, the present application provides an intelligent maintenance-free respirator and a heating control method thereof.

[0004] To solve the above technical problems, the technical solution adopted by the present application is:

[0005] An intelligent maintenance-free respirator, comprising a connecting flange, a visible silica gel observation barrel, an upper end plate, a sensor control box, a silica gel heating device, a silica gel filter barrel, a shell glass, a lower sealing plate, a solenoid valve, a liquid sealing cup, a humidity and pressure difference sensor;

[0006] One end of the connecting flange is connected to the oil conservator of the transformer, and the other end is connected to one end of the visible silica gel observation barrel. The other end of the visible silica gel observation barrel is connected to the top surface of the upper end plate. The side surface of the upper end plate is connected to the sensor control box. The humidity and pressure difference sensor is installed in the sensor control box. The probe on the humidity and pressure difference sensor is inserted into the inside of the respirator through the processing hole pre-set on the upper end plate to measure the change of the humidity and pressure in the respirator. The bottom surface of the upper end plate is provided with the silica gel heating device. The silica gel heating device is wrapped and installed in the silica gel filter barrel. The shell glass is a cylindrical shell. The upper and lower ports of the shell glass are sealingly connected to the circumferential edges of the upper end plate and the lower sealing plate respectively, and the shell glass is the outer layer of the silica gel filter barrel. The solenoid valve is installed on the side surface of the lower sealing plate. The liquid sealing cup is installed on the bottom of the lower sealing plate.

[0007] A heating control method of an intelligent maintenance-free respirator, characterized in that it comprises the following steps:

[0008] Step 1: During the breathing process, the static pressure generated by the liquid height in the liquid sealing cup amplifies the positive and negative pressure of the breathing to the range collected by the pressure difference sensor, and the liquid in the liquid sealing cup will generate liquid level fluctuation when breathing, so that the breathing state of the intelligent maintenance-free respirator can be observed;

[0009] Step 2, the positive and negative pressure in the respirator after the static pressure amplification is collected by the pressure difference sensor in the sensor control box, when the humidity is greater than the preset value or the cycle heating time has been reached, the respirator is in the positive pressure exhalation state, and the silica gel heating device starts to heat;

[0010] Step 3: The visible silica gel observation barrel determines the use of silica gel in the respirator, when the silica gel in the visible silica gel observation barrel is discolored, it is determined that the silica gel in the respirator has lost the regeneration ability.

[0011] The beneficial effects produced by the above technical scheme are:

[0012] The present application provides an intelligent maintenance-free respirator and a heating control method thereof, which can determine the breathing state of the respirator by checking the pressure difference change in the respirator. The respirator can only start heating when it is in the exhalation state, and the silica gel particles are dried, thereby avoiding the problem of water vapor flowing back into the transformer oil tank due to inhalation during the heating process.

[0013] The respirator has a double-visual function, the breathing state of the respirator can be observed through the lowermost liquid sealing cup, and the state that the silica gel in the respirator has lost the regeneration ability can be determined through the uppermost visible silica gel observation barrel, so that the possibility of problems of the respirator is avoided to the greatest extent through the double-checking protection of actual observation and internal sensor measurement, and the transformer is effectively protected, thereby providing higher protection capability. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The figure is a structure diagram of the maintenance-free respirator in the embodiment of the present application;

[0015] Figure 2 The figure is a front view of the maintenance-free respirator in the embodiment of the present application;

[0016] Figure 3 The figure is a flow chart of the heating control method of the maintenance-free respirator in the embodiment of the present application. DETAILED DESCRIPTION

[0017] The specific embodiments of the present application will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0018] An intelligent maintenance-free respirator, such as Figure 1 , Figure 2As shown, including the connection flange 1, visible silica gel observation barrel 2, the upper end plate 3, sensor control box 4, silica gel heating device 5, silica gel filter barrel 6, shell glass 7, lower sealing plate 8, solenoid valve 9, liquid seal cup 10, humidity and differential pressure sensor;

[0019] The connection flange 1 is connected to the transformer oil conservator at one end, and the other end is connected to one end of the visible silica gel observation barrel 2. The visible silica gel observation barrel can effectively determine the humidity and use of the silica gel in the respirator. When the silica gel in the visible silica gel observation barrel 2 changes color, it can be determined that the silica gel in the respirator has lost its regenerative ability. The other end of the visible silica gel observation barrel 2 is connected to the top surface of the upper end plate 3. The side surface of the upper end plate 3 is connected to the sensor control box 4. The humidity and differential pressure sensor is installed in the sensor control box 4. The probe on the sensor is inserted into the respirator through the processing hole pre-set on the upper end plate 3. The humidity and pressure changes in the respirator are measured. The bottom surface of the upper end plate 3 is provided with a silica gel heating device 5. The silica gel heating device 5 is wrapped and installed in the silica gel filter barrel 6. The shell glass 7 is a cylindrical shell. The upper and lower ports of the shell glass 7 are sealingly connected to the circumferential edges of the upper end plate 3 and the lower sealing plate 8, respectively, as the outer layer of the silica gel filter barrel 6. When the silica gel heating device 5 is started to heat, the water vapor evaporated from the silica gel is condensed into water droplets through the shell glass 7 and flows into the funnel-shaped overflow groove processed on the lower sealing plate 8, and is discharged outside the respirator through the solenoid valve 9 connected to the side surface of the lower sealing plate 8. The liquid seal cup 10 is installed at the bottom of the lower sealing plate 8. Based on effectively observing the breathing condition of the respirator, the liquid seal cup 10 cooperates with the differential pressure sensor in the sensor control box 4 to discharge the breathing data in the respirator. Through the judgment of the intelligent maintenance-free respirator heating control system, the silica gel heating device 5 is controlled to heat.

[0020] A heating control method of an intelligent maintenance-free respirator, as shown Figure 3 During the breathing process, a small positive and negative pressure difference may occur. However, the pressure difference is too small to be collected by conventional methods, so the pressure difference needs to be amplified. The specific steps include the following steps:

[0021] Step 1: During the breathing process, the static pressure generated by the liquid level in the liquid seal cup amplifies the positive and negative pressure of the breathing to the range that can be collected by the differential pressure sensor. The liquid in the liquid seal cup will produce liquid level fluctuation during breathing, which can observe the breathing state of the intelligent maintenance-free respirator.

[0022] Step 2, the positive and negative pressure in the respirator after static pressure amplification is collected by the differential pressure sensor in the sensor control box. When the humidity is greater than the preset value or has reached the cycle heating time, the respirator is in the positive pressure exhalation state, and the silica gel heating device starts to heat.

[0023] Step 3: The use of silica gel in the respirator is determined by observing the visible silica gel observation barrel. When the silica gel in the visible silica gel observation barrel changes color, it is determined that the silica gel in the respirator has lost its regenerative ability.

[0024] The above description is merely the preferred embodiments of the present disclosure and the explanation of the principles of the technology applied. It should be understood by those skilled in the art that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combinations of the above technical features or equivalent features without departing from the above inventive concept. For example, the above features are replaced with each other to form a technical solution with similar functions disclosed in the embodiments of the present disclosure (but not limited to).

Claims

1. An intelligent maintenance-free respirator, comprising: The connecting flange is connected with the transformer oil conservator at one end and with one end of the visible silica gel observation barrel at the other end, the other end of the visible silica gel observation barrel is connected with the top surface of the upper end plate, the side surface of the upper end plate is connected with the sensor control box, the bottom surface of the upper end plate is provided with the silica gel heating device in the center, the silica gel heating device is wrapped and installed in the silica gel filter barrel, the upper and lower ports of the shell glass are sealingly connected with the circumferential edges of the upper end plate and the lower sealing plate respectively, the shell glass is an outer layer of the silica gel filter barrel, the electromagnetic valve is installed on the side surface of the lower sealing plate, and the liquid sealing cup is installed on the bottom of the lower sealing plate; The shell glass is a cylindrical shell; The humidity and differential pressure sensor is installed in the sensor control box, the probe on the humidity and differential pressure sensor is inserted into the respirator through the processing hole pre-set on the upper end plate, and the humidity and pressure changes in the respirator are measured; The respirator has a double visual function, the breathing state of the respirator is observed through the liquid sealing cup, and the silica gel regeneration capacity state in the respirator is determined through the visible silica gel observation barrel; The heating control method of the intelligent maintenance-free respirator comprises the following steps: Step 1: During the breathing process, the static pressure generated by the liquid level in the liquid sealing cup amplifies the positive and negative pressure of the breathing to the range collected by the differential pressure sensor, the liquid in the liquid sealing cup will produce liquid level fluctuation during the breathing, and the breathing state of the intelligent maintenance-free respirator can be observed; Step 2: The positive and negative pressure amplified by the static pressure in the respirator is collected by the differential pressure sensor in the sensor control box, when the humidity is greater than the preset value or the circulation heating time has been reached, the respirator is in the positive pressure exhalation state, and the silica gel heating device starts to heat when the differential pressure sensor judges that the respirator is in the positive pressure exhalation state; Step 3: The visible silica gel observation barrel determines the use of silica gel in the respirator, when the silica gel in the visible silica gel observation barrel changes color, it is determined that the silica gel in the respirator has lost the regeneration capacity. ​

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