Energy-saving centralized gas supply equipment

Abstract

The utility model relates to the technical field of gas supply equipment, and discloses energy-saving gas centralized supply equipment which comprises a liquid phase busbar, a switching valve group, a first-stage pressure reducing valve group, an air temperature type vaporizer, an auxiliary heater, a second-stage pressure regulating valve group, a switching valve group and an electric control system which are connected in sequence, a safety valve is arranged between the second-stage pressure regulating valve group and the stop valve group, and the plurality of liquid phase busbars are connected with liquefied propane gas cylinders. According to the structure of the liquefied propane centralized gas supply system, gas centralized gas supply equipment which does not need or consumes little electricity is not needed, so that the energy consumption cost of customers can be greatly saved, potential safety hazards in production are reduced, and the production efficiency is improved. And all gas supply components are highly integrated, the installation and debugging process is simplified, and use by customers is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of gas supply equipment technology, in particular to energy-saving fuel gas centralized gas supply equipment. Background Art

[0002] Chinese Patent: An automatic control device for a centralized gas supply system, authorization announcement number: CN 211423997 U, authorization announcement date: September 4, 2020. The utility model is an automatic control device for a centralized gas supply system, which can adjust the gas pressure in the gas collecting box to meet the needs of different gas transmission pressures, and is convenient for exhausting the gas in the gas supply bottle, thereby improving the utilization rate of resources. However, the vaporizer of the device is mainly water bath heating type, and the water bath heating vaporizer has fundamental defects in the process: it consumes a lot of electricity, and there are great safety hazards in the gas heating process. Therefore, it is necessary to propose an energy-saving gas centralized gas supply equipment to solve the above problems. Summary of the invention

[0003] In order to solve the above problems, the utility model provides an energy-saving centralized gas supply equipment, which includes a liquid phase bus, a switching valve group, a first-level pressure reducing valve group, an air-temperature vaporizer, an auxiliary heater, a second-level pressure regulating valve group and a switching valve group and an electronic control system connected in sequence. A safety valve is provided between the second-level pressure regulating valve group and the cut-off valve group to serve as an alarm, and several of the liquid phase buses are connected to liquefied propane cylinders.

[0004] A further improvement of the utility model is that a plurality of pressure sensors PT are connected to the liquid phase bus, and the pressure sensors are connected to a PLC control box.

[0005] A further improvement of the utility model is that the PLC control box is connected with an audible and visual alarm or a buzzer alarm, the pressure sensor transmits the signal to the PLC control box, the box body has a buzzer alarm, and an on-site audible and visual alarm is realized, or the alarm signal is transmitted remotely to the duty room for alarm, and an alarm is set up in the duty room.

[0006] A further improvement of the utility model is that the auxiliary heater includes a safety valve connected to the air-temperature vaporizer, and two first ball valves are installed in series on the safety valve. The auxiliary heater is an emergency function device and is generally not turned on during normal operation.

[0007] A further improvement of the utility model is that the temperature sensor is additionally installed at the outlet of the air-temperature vaporizer.

[0008] A further improvement of the utility model is that the secondary pressure regulating valve group includes two pressure regulating valves connected in parallel, and two of the second ball valves are connected in series on both sides of the two pressure regulating valves, and the secondary pressure regulating valve group plays a role in stabilizing pressure.

[0009] A further improvement of the utility model is that the shut-off valve group is connected to the electronic control system and can judge whether the gas is fully vaporized by the temperature of the gas in different states. The shut-off valve group will automatically cut off the gas source, shut down and alarm. The electrical signals of the pressure sensor, temperature sensor and alarm on the equipment will be input into the PLC control box, and then the set program will output the alarm or action.

[0010] A further improvement of the utility model is that the shut-off valve group includes three automatic switching valves connected in series and parallel, and a third ball valve is provided on both sides of the automatic shut-off valve.

[0011] The structure of the utility model requires no or very little electricity for centralized gas supply equipment, which not only greatly saves customers' energy consumption costs and reduces potential safety hazards in production, but also highly integrates various gas supply components, simplifies the installation and debugging process, and is convenient for customers to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the two-stage pressure regulating valve group of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the switching valve group of the utility model.

[0015] Figure numerals: 1-liquid phase bus, 2-switching valve group, 3-first-stage pressure reducing valve group, 4-air-temperature vaporizer, 5-auxiliary heater, 6-second-stage pressure regulating valve group, 7-switching valve group, 8-electronic control system, 9-liquefied propane cylinder, 10-pressure sensor, 11-PLC control box, 12-sound and light alarm, 13-safety valve, 14-first ball valve, 15-temperature sensor, 16-pressure regulating valve, 17-second ball valve, 18-safety valve, 19-automatic switching valve, 20-third ball valve. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0017] The utility model relates to an energy-saving gas centralized gas supply equipment, which is connected in sequence and includes a liquid phase bus 1, a switching valve group 2, a primary pressure reducing valve group 3, an air-temperature vaporizer 4, an auxiliary heater 5, a secondary pressure regulating valve group 6, a switching valve group 7 and an electric control system 8. A safety valve 17 is arranged between the secondary pressure regulating valve group 6 and the cut-off valve group 7 to serve as an alarm. A plurality of the liquid phase buses 1 are connected to liquefied propane cylinders 9. The liquefied propane is reduced in pressure to a certain pressure through the primary pressure regulating valve group 3 and then flows into the air-temperature vaporizer 4 for a sufficient vaporization reaction. Finally, gaseous propane flows out of the air-temperature vaporizer 4.

[0018] The liquid phase bus 1 is connected to a plurality of pressure sensors 10, and the pressure sensors 10 are connected to a PLC control box 11; the PLC control box 11 is connected to an audible and visual alarm 12 or a buzzer alarm. When the liquefied propane cylinder 9 in operation is about to run out, the pressure sensor 10 transmits a signal to the PLC control box 11, and the PLC control box 11 has an audible and visual alarm 12 or a buzzer alarm, so as to realize an on-site audible and visual alarm or transmit the alarm signal remotely to the duty room for an alarm.

[0019] The auxiliary heater 5 includes a safety valve 13 connected to the air-temperature vaporizer 4, and two first ball valves 14 are installed in series on the safety valve 13. The gasification capacity of the air-temperature vaporizer 4 is easily affected by environmental factors. When the gasification capacity is insufficient, the auxiliary heater 5 is turned on to perform secondary vaporization; when the equipment appears, the safety valve 13 will be triggered to alarm for combustible gas;

[0020] The temperature ranges of propane / liquefied petroleum gas in liquid state, gas-liquid coexistence state, and gas state are all different; the case of insufficient vaporization is the liquid state or gas-liquid coexistence state. By installing a temperature sensor 15 at the outlet of the air-temperature vaporizer 4 and setting a value, it is possible to judge whether the gas is sufficiently vaporized by the temperature of the gas in different states;

[0021] The secondary pressure regulating valve group 6 includes two pressure regulating valves 16 connected in parallel, and two second ball valves 17 are connected in series on both sides of the two pressure regulating valves 16. The secondary pressure regulating valve group 6 plays a role of stabilizing pressure; the cut-off valve group 2 is connected to the electronic control system 8 to realize the automation of the equipment and improve the safety factor. It can judge whether the gas is fully vaporized by the temperature of the gas in different states. The cut-off valve group 2 will automatically cut off the gas source, shut down and alarm. The electrical signals of the pressure sensor 10, the temperature sensor 15 and the alarm on the equipment will be input into the PLC control box 11, and then the set program will output the alarm or action; the cut-off valve group 2 includes three automatic switching valves 19 connected in series and parallel, and third ball valves 20 are provided on both sides of the automatic cut-off valve 19.

[0022] During production, the liquefied propane inside the liquefied propane cylinder 9 flows through the rear equipment through the liquid phase bus 1, each group of the liquid phase bus 1 is opened separately, and the other groups are opened in a standby state; when the liquefied propane cylinders 9 of one group are used up, the switching valve group 7 will cut off the exhausted group and open the next group at the same time, and the liquefied propane is reduced to a certain pressure through the first-level pressure regulating valve group 3, and then flows into the air-temperature vaporizer 4 for sufficient vaporization reaction, and finally what flows out of the air-temperature vaporizer 4 is gaseous propane.

[0023] When the liquefied propane cylinder 9 is about to run out during operation, the pressure will decrease until it reaches the lower limit setting value of the program pressure; the pressure sensor 10 transmits the signal to the PLC control box 11, and an audible and visual alarm 12 is provided above the PLC control box 11 to realize on-site audible and visual alarm, or transmit the alarm signal to the duty room for alarm, and set up an alarm in the duty room to realize linkage, so that personnel can find the situation at the first time and remind them to fill up the gas cylinder. The above is the alarm process; the secondary pressure regulating valve group 6 plays a role of stabilizing pressure, corresponding to the gas pressure value required by the customer's production, and is adjusted to the required pressure to supply the workshop production.

[0024] The shut-off valve group 7 is connected to the electronic control system 8 to realize the automation of the equipment and improve the safety factor. The shut-off valve group 7 will automatically cut off the gas source, shut down and alarm. If a section of the pipeline is over-pressured, the pressure sensor 10 will send a signal alarm to the PLC control box 11, and the shut-off valve group 7 will perform a shut-off action, and the equipment will stop working. At this time, if the pressure still rises and reaches the set value of the safety valve 18, the safety valve 18 will automatically discharge the pressure to ensure safety. In the event of under-pressure, leakage and low-temperature over-liquid, the electrical signals of the pressure sensor 10, temperature sensor 15 and alarm on the equipment will be input into the PLC control box 11, and then the set program will output an alarm or action.

[0025] It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which are all within the protection scope of the utility model.

Claims

1. An energy-saving gas centralized gas supply equipment, characterized in that: The components are connected in sequence, including a liquid phase bus, a switching valve group, a first-level pressure reducing valve group, an air-temperature vaporizer, an auxiliary heater, a second-level pressure regulating valve group, a switching valve group and an electronic control system. A safety valve is provided between the second-level pressure regulating valve group and the cut-off valve group. Several of the liquid phase buses are connected to liquefied propane cylinders.

2. The energy-saving centralized gas supply equipment according to claim 1 is characterized in that: The liquid phase bus is connected to a plurality of pressure sensors, and the pressure sensors are connected to a PLC control box.

3. The energy-saving centralized gas supply equipment according to claim 2 is characterized in that: The PLC control box is connected with an audible and visual alarm or a buzzer alarm.

4. The energy-saving centralized gas supply equipment according to claim 1 is characterized in that: The auxiliary heater comprises a safety valve connected to the air-temperature carburetor, and two first ball valves are installed in series on the safety valve.

5. The energy-saving centralized gas supply equipment according to claim 1 is characterized in that: A temperature sensor is installed at the outlet of the air-temperature vaporizer.

6. The energy-saving centralized gas supply equipment according to claim 1, characterized in that: The secondary pressure regulating valve group comprises two pressure regulating valves connected in parallel, and two second ball valves are connected in series on both sides of the two pressure regulating valves.

7. The energy-saving centralized gas supply equipment according to claim 1 is characterized in that: The cut-off valve group is connected to the electric control system, and the cut-off valve group will automatically cut off the gas source, shut down and alarm.

8. The energy-saving centralized gas supply equipment according to claim 7 is characterized in that: The cut-off valve group comprises three automatic switching valves connected in series and in parallel, and a third ball valve is arranged on both sides of the automatic cut-off valve.

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