Portable quick-release sulfur hexafluoride gas cylinder heating device

Abstract

The utility model discloses a portable quick-release sulfur hexafluoride gas cylinder heating device which comprises a heat preservation pad, a heating belt and a temperature sensor, wherein the heating belt and the temperature sensor are arranged on one side, facing a gas cylinder, of the heat preservation pad; the heating belt is arranged on the heat preservation pad in a snakelike shape; at least two first flexible bridles which are arranged at intervals are arranged at one end of the heat preservation pad, and at least two second flexible bridles which are arranged at intervals are arranged at the other end of the heat preservation pad; a first self-adhesion part is arranged on one side, facing the second flexible bridle, of the first flexible bridle, and a second self-adhesion part matched with the first self-adhesion part is arranged on the second flexible bridle; an expansion mechanism for separating the first flexible bridle from the second flexible bridle through expansion is arranged between the first flexible bridle and the second flexible bridle, the input end of the expansion mechanism is electrically connected with the output end of the controller, and the input end of the controller is electrically connected with the output end of the temperature sensor.

Description

Technical Field

[0001] The utility model relates to the field of gas cylinder heating, in particular to a light and quick-detachable sulfur hexafluoride gas cylinder heating device. Background Art

[0002] Sulfur hexafluoride is widely used in power equipment due to its excellent physical and chemical properties. However, it is one of the six greenhouse gases specified in the Kyoto Protocol. Directly discharging sulfur hexafluoride waste gas into the atmosphere will aggravate the greenhouse effect and damage the ecological environment. Therefore, it is necessary to strengthen the recovery and treatment of sulfur hexafluoride waste gas.

[0003] The sulfur hexafluoride gas recovery and regeneration process is as follows: first, the gas in the gas cylinder to be treated is extracted through the recovery inlet, and then the moisture in the recovered gas is removed through the purification tank. After the gas cylinder to be treated is evacuated to a vacuum, the purified gas that has passed the test can be refilled into the cylinder.

[0004] During the gas regeneration pumping and switchgear live gas replenishment process, the internal pressure of the cylinder drops rapidly, and the internal sulfur hexafluoride also vaporizes rapidly (from liquid to gas) to make up for the pressure loss, continuously absorbing heat, causing the temperature of the lower layer of liquid sulfur hexafluoride in the cylinder to drop sharply, and the water vapor in the air condenses into water droplets when it is cold, causing frost on the lower 1 / 5 of the cylinder. After the cylinder is frosted, the temperature of the internal liquid sulfur hexafluoride drops below 0°C. Since the saturated vapor pressure of liquefied gas is proportional to the temperature, the lower the temperature, the lower the saturated vapor pressure. The pressure at the outlet of the cylinder angle valve is determined by the saturated vapor pressure. Therefore, after the cylinder is frosted, the outlet pressure is significantly reduced, which seriously affects the pumping rate. When replenishing the gas, the remaining 20% ​​of the gas cannot be used, resulting in waste.

[0005] In view of the phenomenon of frost condensation caused by sudden temperature drop during the gasification of sulfur hexafluoride, the sulfur hexafluoride cylinder is usually heated to alleviate the problem. The utility model patent with patent number 201720541939.8 discloses a heating device for sulfur hexafluoride cylinders, including a heat preservation pad, a heating cable, a power cord, a plug and a rope. The left and right ends of the heat preservation pad are respectively provided with matching fasteners that can connect the left and right ends of the heat preservation pad together. The front side of the heat preservation pad is provided with a heating cable arranged in a serpentine shape, and ropes are arranged at intervals on the heating cable to fix it to the heat preservation pad at the corresponding position.

[0006] According to the storage requirements of sulfur hexafluoride gas cylinders: the storage temperature of sulfur hexafluoride gas cylinders should be controlled between -40℃ and 50℃. Too high or too low temperature may cause abnormal changes in the pressure in the gas cylinder, thereby affecting the stability and safety of the gas. Therefore, the temperature control of the gas cylinder is particularly important. However, the above patented technology cannot monitor the heating temperature, and cannot detect abnormal heating of the heating cable in time, nor does it have corresponding alarm and solution measures. Utility Model Content

[0007] The utility model aims to provide a lightweight and quick-detachable sulfur hexafluoride gas cylinder heating device to solve the problem that the existing sulfur hexafluoride gas cylinder heating device cannot monitor the temperature of the gas cylinder in real time during heating and cannot take effective measures when an abnormality occurs in the heating device.

[0008] In order to solve the above technical problems, the present invention provides a lightweight quick-detachable sulfur hexafluoride gas cylinder heating device, comprising a heat preservation pad, a heating belt and a temperature sensor arranged on the side of the heat preservation pad facing the gas cylinder; the heating belt is arranged on the heat preservation pad in a serpentine shape;

[0009] One end of the thermal insulation pad is provided with at least two first flexible straps arranged at intervals, and the other end of the thermal insulation pad is provided with at least two second flexible straps arranged at intervals;

[0010] A first self-adhesive portion is provided on a side of the first flexible belt facing the second flexible belt, and a second self-adhesive portion matching the first self-adhesive portion is provided on the second flexible belt;

[0011] An expansion mechanism is provided between the first flexible belt and the second flexible belt to separate the first flexible belt from the second flexible belt by expansion, the input end of the expansion mechanism is electrically connected to the output end of the controller, and the input end of the controller is electrically connected to the output end of the temperature sensor.

[0012] Furthermore, a first through hole is provided in the middle of the first self-adhesive portion; an airbag mounting groove is provided on the first flexible strap, which protrudes toward a side away from the first self-adhesive portion, and an opening of the airbag mounting groove is aligned with the first through hole; the expansion mechanism includes an inflatable airbag, an inflating unit and a controller, the inflatable airbag is installed in the airbag mounting groove, the inflating unit is installed in the inflatable airbag for inflating the inflatable airbag, and the output end of the controller is electrically connected to the input end of the inflating unit.

[0013] Furthermore, the inflation unit includes a gas expansion agent and an igniter arranged in the inflatable airbag; the igniter is connected to the output end of the controller through the driving unit.

[0014] Furthermore, the drive unit includes a switching circuit and a driving circuit; the switching circuit includes a first transistor and a relay, the gate of the first transistor Q1 is connected to the output end of the controller, and the source of the first transistor Q1 is grounded; the relay J is a normally open relay, and the coil of the relay L is connected between the source of the first transistor Q1 and the first power supply; the driving circuit includes a second power supply, a resistor R, a second transistor Q2, an inductor L and a transformer T; the second power supply is connected in series with the relay J, the resistor R and the inductor L are connected in series between the positive terminal after the second power supply and the relay J are connected in series and the base of the second transistor Q2, the primary coil of the transformer T is connected to the collector of the second transistor Q2, the emitter of the second transistor Q2 is grounded, and the secondary coil of the transformer T is connected to the igniter.

[0015] Furthermore, the device also includes an alarm connected to the output end of the controller.

[0016] Furthermore, the device also includes a display connected to the output end of the controller.

[0017] Furthermore, the heating belt is a glass fiber heating belt.

[0018] Furthermore, the first self-adhesive portion and the second self-adhesive portion are both Velcro.

[0019] The beneficial effects of the utility model are as follows: when the gas cylinder needs to be heated, the front side of the thermal insulation pad (the side provided with the heating belt and the temperature sensor) is wrapped around the outside of the part to be heated of the gas cylinder, and then the first self-adhesive portion of the first flexible strap is bonded together with the second self-adhesive portion of the second flexible strap, and finally the power is turned on, and the thermostat is turned on to control the heating belt for heating; the heating device has good adhesion to the gas cylinder and heats evenly, and can also prevent heat energy from being lost by providing the thermal insulation pad; the temperature sensor can be provided to monitor the temperature of the heated gas cylinder in real time, so as to promptly detect abnormal heating conditions; by providing an expansion mechanism that can separate the first flexible strap from the second flexible strap through expansion, the first flexible strap and the second flexible strap can be automatically separated when the temperature of the gas cylinder exceeds a threshold value, so that the thermal insulation pad loses support and is separated from the gas cylinder, thereby preventing the heating device from continuing to heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The same reference numerals are used in these drawings to represent the same or similar parts. The exemplary embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 It is a front structural schematic diagram of an embodiment of the utility model.

[0022] Figure 2It is a schematic diagram of the back structure of an embodiment of the utility model.

[0023] Figure 3 This is a schematic diagram of the igniter control principle of an embodiment of the utility model.

[0024] Figure 4 This is a circuit diagram of a driving unit according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0025] like Figure 1 The light and quick-detachable sulfur hexafluoride cylinder heating device shown comprises a heat preservation pad 1 and a heating belt 2 and a temperature sensor 5 arranged on the side of the heat preservation pad 1 facing the cylinder; the heating belt 2 is arranged on the heat preservation pad 1 in a serpentine shape; one end of the heat preservation pad 1 is provided with at least two first flexible straps 3 arranged at intervals, and the other end of the heat preservation pad 1 is provided with at least two second flexible straps 6 arranged at intervals; the first flexible strap 3 is provided with a first self-adhesive portion 32 on the side facing the second flexible strap 6, and the second flexible strap 6 is provided with a second self-adhesive portion 61 matching the first self-adhesive portion 32; an expansion mechanism is provided between the first flexible strap 3 and the second flexible strap 6 for separating the first flexible strap 3 from the second flexible strap 6 by expansion, the input end of the expansion mechanism is connected to the output end of the controller 7, and the input end of the controller 7 is connected to the output end of the temperature sensor.

[0026] When the gas cylinder needs to be heated, the front side of the thermal insulation pad 1 (the side with the heating belt 2 and the temperature sensor) is wrapped around the outside of the part to be heated of the gas cylinder, and then the first self-adhesive portion 32 of the first flexible strap 3 is bonded together with the second self-adhesive portion 61 of the second flexible strap 6, and finally the power is turned on through the plug 23, and the thermostat 22 is turned on to control the heating belt 2 for heating; the heating device has good adhesion to the gas cylinder and the heating is more uniform, and the thermal insulation pad 1 can also prevent the loss of heat energy by setting up the temperature sensor; the temperature of the heated gas cylinder can be monitored in real time by setting up the temperature sensor, so as to timely detect abnormal heating conditions; by setting up an expansion mechanism that can separate the first flexible strap 3 from the second flexible strap 6 by expansion, the first flexible strap 3 and the second flexible strap 6 can be automatically separated when the temperature of the gas cylinder exceeds a threshold value, so that the thermal insulation pad 1 loses support and is separated from the gas cylinder, preventing the heating device from continuing to heat. Based on the provisions in the storage requirements of sulfur hexafluoride gas cylinders: the storage temperature of sulfur hexafluoride gas cylinders should be controlled between -40°C and 50°C. Too high or too low a temperature may cause abnormal changes in the pressure in the gas cylinder, thereby affecting the stability and safety of the gas. According to the actual temperature changes of the gas cylinder during the sulfur hexafluoride gas regeneration work, it is finally determined through research and analysis that the gas cylinder temperature needs to be maintained within the range of 20-45 degrees Celsius. When the gas cylinder temperature exceeds 45 degrees Celsius, the expansion mechanism is controlled to expand and separate the first flexible strap 3 and the second flexible strap 6.

[0027] According to one embodiment of the present application, a first through hole is provided in the middle of the first self-adhesive portion 32; an airbag mounting groove 31 is provided on the first flexible strap 3, which protrudes toward a side away from the first self-adhesive portion 32, and the opening of the airbag mounting groove is aligned with the first through hole; the expansion mechanism includes an inflatable airbag 4, an inflating unit, and a controller 7, the inflatable airbag 4 is installed in the airbag mounting groove 31, the inflating unit is installed in the inflatable airbag 4 for inflating the inflatable airbag 4, and the output end of the controller 7 is electrically connected to the input end of the inflating unit. When the inflating unit receives a control signal, it inflates the airbag to expand the airbag, and the first flexible strap 3 and the second flexible strap 6 can be separated by the inflated airbag.

[0028] According to one embodiment of the present application, the inflation unit 41 includes a gas expansion agent and an igniter disposed in the inflatable airbag 4; the igniter is connected to the output end of the controller 7 through a driving unit. The gas expansion agent can be sodium nitride. When the igniter is ignited, the sodium nitride is decomposed into elemental sodium and nitrogen when the temperature is higher than 87°C by instantaneous rapid heating, and the airbag is inflated to a full state.

[0029] According to an embodiment of the present application, the driving unit includes a switch circuit and a drive circuit; the switch circuit includes a first transistor and a relay, the gate of the first transistor Q1 is connected to the output end of the controller 7, and the source of the first transistor Q1 is grounded; the relay J is a normally open relay, and the coil of the relay L is connected between the source of the first transistor Q1 and the first power supply; the drive circuit includes a second power supply, a resistor R, a second transistor Q2, an inductor L and a transformer T; the second power supply is connected in series with the relay J, the resistor R and the inductor L are connected in series between the positive terminal of the second power supply and the relay J connected in series and the base of the second transistor Q2, the primary coil of the transformer T is connected to the collector of the second transistor Q2, the emitter of the second transistor Q2 is grounded, and the secondary coil of the transformer T is connected to the igniter. The controller 7 can use a single-chip microcomputer. When the gate of the first transistor Q1 receives the output signal of the single-chip microcomputer, it is turned on and the coil of the relay J is energized, so that the moving contact of the relay J is closed close to the static contact and the switch function is realized. After the relay J is closed, the drive circuit works, and the electrical signal of the second power supply of the transformer T is boosted to drive the igniter to ignite.

[0030] According to one embodiment of the present application, the device further includes an alarm connected to the output end of the controller 7. By setting the alarm, when the temperature exceeds a first threshold value (which can be set to 40 degrees Celsius), an alarm signal can be issued to remind the staff to adjust the heating temperature in time. When the temperature exceeds a second threshold value (which can be set to 45 degrees Celsius), the expansion mechanism is activated.

[0031] According to an embodiment of the present application, the device further comprises a display connected to the output end of the controller 7. During use, the temperature detected by the sensor can be displayed in real time through the display.

[0032] According to an embodiment of the present application, the heating belt 2 is a glass fiber heating belt 2. The glass fiber heating belt 2 heats more evenly, is soft and bendable, and can ensure the fit with the gas cylinder, making the heating more even.

[0033] It has good anti-corrosion, wear-resistant, insulation and fire-retardant properties.

[0034] According to an embodiment of the present application, the first self-adhesive portion 32 and the second self-adhesive portion 61 are both Velcro.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A lightweight quick-detachable sulfur hexafluoride cylinder heating device, characterized in that: It includes a heat preservation pad, a heating belt and a temperature sensor arranged on the side of the heat preservation pad facing the gas cylinder; the heating belt is arranged on the heat preservation pad in a serpentine shape; One end of the thermal insulation pad is provided with at least two first flexible straps arranged at intervals, and the other end of the thermal insulation pad is provided with at least two second flexible straps arranged at intervals; A first self-adhesive portion is provided on a side of the first flexible belt facing the second flexible belt, and a second self-adhesive portion matching the first self-adhesive portion is provided on the second flexible belt; An expansion mechanism is provided between the first flexible belt and the second flexible belt to separate the first flexible belt from the second flexible belt by expansion, an input end of the expansion mechanism is electrically connected to an output end of a controller, and an input end of the controller is electrically connected to an output end of a temperature sensor.

2. The portable quick-detachable sulfur hexafluoride cylinder heating device according to claim 1 is characterized in that: A first through hole is provided in the middle of the first self-adhesive portion; an airbag mounting groove is provided on the first flexible strap, which protrudes toward a side away from the first self-adhesive portion, and an opening of the airbag mounting groove is aligned with the first through hole; the expansion mechanism includes an inflatable airbag, an inflating unit and a controller, the inflatable airbag is installed in the airbag mounting groove, the inflating unit is installed in the inflatable airbag for inflating the inflatable airbag, and the output end of the controller is electrically connected to the input end of the inflating unit.

3. The portable quick-detachable sulfur hexafluoride cylinder heating device according to claim 2 is characterized in that: The inflation unit includes a gas expansion agent and an igniter arranged in the inflatable airbag; the igniter is connected to the output end of the controller through a driving unit.

4. The portable quick-detachable sulfur hexafluoride cylinder heating device according to claim 3 is characterized in that: The driving unit includes a switching circuit and a driving circuit; the switching circuit includes a first transistor and a relay, the gate of the first transistor Q1 is connected to the output end of the controller, and the source of the first transistor Q1 is grounded; the relay J is a normally open relay, and the coil of the relay L is connected between the source of the first transistor Q1 and the first power supply; the driving circuit includes a second power supply, a resistor R, a second transistor Q2, an inductor L and a transformer T; the second power supply is connected in series with the relay J, the resistor R and the inductor L are connected in series between the positive terminal after the second power supply and the relay J are connected in series and the base of the second transistor Q2, the primary coil of the transformer T is connected to the collector of the second transistor Q2, the emitter of the second transistor Q2 is grounded, and the secondary coil of the transformer T is connected to the igniter.

5. The portable quick-detachable sulfur hexafluoride cylinder heating device according to claim 4 is characterized in that: The device also includes an alarm connected to the output end of the controller.

6. The portable quick-detachable sulfur hexafluoride cylinder heating device according to claim 4 or 5, characterized in that: The device also includes a display connected to the output terminal of the controller.

7. The portable quick-detachable sulfur hexafluoride cylinder heating device according to claim 1 is characterized in that: The heating belt is a glass fiber heating belt.

8. The portable quick-detachable sulfur hexafluoride cylinder heating device according to claim 1 or 7, characterized in that: The first self-adhesive portion and the second self-adhesive portion are both Velcro.

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