CN202109201U - Natural Gas Recovery Unit - Google Patents

Abstract

The utility model discloses a natural gas recovery device, which mainly includes a gas filling gun, a recovery pipe, gas storage tanks, a gas storage tank connecting pipe, a pressure release valve, a recovery gas transmission pipe and gas valves, wherein two double-layer cylindrical gas storage tanks are mounted in a housing of the gas filling gun, the outer layer of the gas storage tank is a hard cylinder body designed with the pressure release valve at the top, the inner layer of the gas storage tank is an elastic rubber cylinder, the bottom part of the hard cylinder body is closely fixed with that of the rubber cylinder, and a certain distance is kept between the top ends of the hard cylinder and the rubber cylinder as well as the side walls of the hard cylinder and the rubber cylinder; the inner layer rubber cylinders of the two gas storage tanks are communicated through the gas storage tank connecting pipe; one end of one recovery pipe is connected with an exhaust port of the gas filling gun, while the other end thereof is communicated with one gas storage tank; a valve lever is designed at the bottom part of the inner layer rubber cylinder of the gas storage tank communicate with the recovery pipe, two rubber gas valves are designed on the valve lever, one rubber gas valve corresponds to the port of the recovery pipe, and the other rubber gas valve corresponds to the port of the connecting pipe of the gas storage tank; and one end of one recovery gas transmission pipe is communicated with a gas inlet pipe of a gas filling machine, and the other end thereof is communicated with an one-way gas outlet valve on the gas storage tank. The utility model has the characteristics that the natural gas recovery device has simple structure and low cost, and is convenient to operate and safe to use.

Description

Natural Gas Recovery Unit

technical field

The utility model relates to a natural gas recovery device applied to natural gas filling equipment. the

Background technique

With the development of the economy and the acceleration of the industrialization process, my country's demand for energy is increasing. As an environmentally friendly energy source, natural gas has gradually become an important energy source for driving vehicles. As a non-renewable energy source, natural gas is becoming less and less with large-scale exploration and development. In some large and medium-sized cities and even county towns, natural gas has become the main energy source for buses, taxis, and short- and medium-distance small freight vehicles. During the refueling process of the car, every time the air gun fills up the gas tank of the car, a small part of the natural gas remaining in the air gun will be discharged to the atmosphere again and again. Although the amount of wasted natural gas discharged during each refueling is very small, the accumulated amount of wasted natural gas is still considerable due to the huge number of vehicles, and the pollution caused by a large amount of emissions to the atmosphere cannot be ignored. the

Contents of the invention

In order to reduce the waste of natural gas and the pollution to the atmosphere during the filling process of automobiles in the gas filling station, the utility model provides a device that can recycle the natural gas remaining in the filling gun and discharged to the atmosphere. the

In order to achieve the above purpose, the utility model natural gas recovery device adopts the following technical solutions:

The recovery device is mainly composed of an air filling gun, a recovery pipe, an air storage tank, a connection pipe for the air storage tank, a pressure reducing valve, a recovery air delivery pipe, and an air valve. Two gas storage tanks are designed and installed in the gas dispenser shell. The gas storage tanks are double-layer cylinder structures, the outer layer is a hard cylinder, and the inner layer is an elastic rubber cylinder. The hard cylinder of each gas storage tank A pressure reducing valve is designed on the top of the body, the bottom of the hard cylinder is tightly fixed to the bottom of the rubber cylinder, there is a certain distance between the top of the hard cylinder and the top of the rubber cylinder, and between the side wall of the hard cylinder and the side wall of the rubber cylinder, and The rubber sleeve of the inner layer of an air storage tank is connected with the rubber sleeve of the inner layer of another air storage tank with an air storage tank connecting pipe. One end of a recovery pipe is connected with the exhaust port on the air gun, and the other end is connected with an air storage tank. The bottom of the inner elastic rubber tube connected to the recovery pipe is designed with a valve lever that can move up and down. There are two rubber valves on the valve lever, one rubber valve corresponds to the recovery pipe port, and the other rubber gas valve The valve corresponds to the gas tank connection pipe port. One end of a recovery air delivery pipe communicates with the air inlet pipe of the dispenser, and the other end communicates with the one-way air outlet valve on the air storage tank. the

In addition, the natural gas recovery device of the utility model can also adopt the separate design of the gas filling machine and the gas storage tank, that is, the side-by-side gas storage tanks are installed outside the casing of the gas filling machine. the

The operating principle of the utility model natural gas recovery device is:

Using the principle of negative pressure, when the gas dispenser refills the car cylinder, the gas in the second gas storage tank connected to the recovery gas pipeline is evacuated to form a vacuum state. After the gas is filled, the residual natural gas in the gas filling gun tube Through the recovery pipe and the rubber air valve, it enters the rubber cylinder in the inner layer of the first air storage tank. When the natural gas in the rubber cylinder of the first gas storage tank accumulates to a certain extent and forms a certain pressure, the rubber gas valve is opened, and then enters the rubber cylinder of the second gas storage tank through the connecting pipe of the gas storage tank for storage. When refueling the car again, with the work of the pressurizer installed on the gas dispenser, the natural gas stored in the rubber barrel of the second gas storage tank will enter the pressurizer through the one-way outlet valve and the recovery gas delivery pipe. The trachea is then pressurized by a pressurizer and added to a car gas cylinder through an air gun. Through such repeated work, the natural gas remaining in the gas filling gun is fully utilized during the gas filling process, thereby achieving energy saving and environmental protection effects. the

The natural gas recovery device of the utility model has the characteristics of simple structure, low cost, convenient operation and safe use, and can achieve better energy-saving and environmental protection effects after installation and use. the

Description of drawings

Fig. 1 is a schematic diagram of the structure and installation of the natural gas recovery device and the filling machine of the utility model. the

Fig. 2 is an enlarged schematic diagram of the cross-sectional structure of the gas storage tank of the natural gas recovery device of the present invention. the

In the figure, 1. Gas dispenser shell 2. Gas dispenser inlet pipe 3. Pressurizer 4. Compressor outlet pipe 5. Air filling gun 6. Gas filling pipe 7. Automobile gas tank 8. Recovery pipe 9. Storage tank Gas tank 10, gas storage tank 11, gas storage tank connecting pipe 12, pressure reducing valve 13, recovery gas delivery pipe 14, rubber cylinder 15, hard cylinder 16, hard cylinder 17, air valve lever 18, rubber air valve 19. Rubber air valve 20. Rubber cylinder 21. One-way air outlet valve

Detailed ways

As shown in Figure 1 and Figure 2, the natural gas recovery device of the present utility model is mainly composed of an air filling gun 5, a recovery pipe 8, an air storage tank 9, an air storage tank 10, a gas storage tank connecting pipe 11, a pressure reducing valve 12, a recovery transmission Trachea 13, air valve form. The gas storage tank 9 and the gas storage tank 10 are designed and installed in the gas dispenser housing 1. The gas storage tank 9 and the gas storage tank 10 are all double-layer cylinder structures, and the outer layer of the gas storage tank 9 is a hard cylinder 15. , the inner layer is a rubber cylinder 14; the outer layer of the gas storage tank 10 is a hard cylinder 16, the inner layer is a rubber cylinder 20, the top of the hard cylinder 15 and the hard cylinder 16 are designed with a pressure reducing valve 12 . The bottom of the hard cylinder 15 of the air storage tank 9 is tightly fixed to the bottom of the rubber cylinder 14, and there is a gap between the top of the hard cylinder 15 and the top of the rubber cylinder 14, and between the side wall of the hard cylinder 15 and the side wall of the rubber cylinder 14. A certain distance; the bottom of the hard cylinder 16 of the air storage tank 10 and the bottom of the rubber cylinder 20 are tightly fixed, between the top of the hard cylinder 16 and the top of the rubber cylinder 20, between the side wall of the hard cylinder 16 and the side wall of the rubber cylinder 20 There is a certain distance between them. The rubber tube 14 of the gas tank 9 inner layer communicates with the rubber tube 20 of the gas tank 10 inner layer with the gas tank connecting pipe 11 . A recovery pipe 8 one end is connected with the exhaust port on the air filling gun (5), and the other end is communicated with the gas storage tank 9. The bottom of the inner rubber tube 14 of the gas storage tank 9 is designed with a valve lever 17 that can move up and down. On the valve lever 17, a rubber gas valve 18 and a rubber gas valve 19 are designed. The rubber gas valve 18 corresponds to the recovery pipe 8 port, and the rubber gas valve The valve 19 corresponds to the port of the connecting pipe 11 of the gas storage tank. One end of a recovery air delivery pipe 13 communicates with the air inlet pipe 2 of the dispenser, and the other end communicates with the one-way outlet valve 21 on the gas storage tank 10 . the

Claims (2)

1. a rock gas recovering device mainly is made up of air filling gun, recovery tube, gas holder, gas holder connecting tube, reduction valve, recovery pneumatic tube, air valve, it is characterized in that: design and installation gas holder (9), gas holder (10) in filling machine housing (1); Gas holder (9), gas holder (10) are the double-layer barrel structure, and the skin of gas holder (9) is hard cylindrical shell (15), and internal layer is rubber tube (14); The skin of gas holder (10) is hard cylindrical shell (16), and internal layer is rubber tube (20); The top of hard cylindrical shell (15), hard cylindrical shell (16) all is designed with a reduction valve (12); The rubber tube (20) of the rubber tube (14) of gas holder (9) internal layer and gas holder (10) internal layer is communicated with gas holder connecting tube (11); Recovery tube (8) one end are connected with relief opening on the air filling gun (5), and the other end is connected with gas holder (9); Internal layer rubber tube (14) bottom design of gas holder (9) has valve lever movable up and down (17); On valve lever (17), be designed with rubber air valve (18), rubber air valve (19); The corresponding recovery tube of rubber air valve (18) (8) port, the corresponding gas holder connecting tube of rubber air valve (19) (11) port; One is reclaimed pneumatic tube (13) one ends and is connected with filling machine suction tude (2), and the other end is connected with unidirectional gas outlet valve (21) on the gas holder (10).

2. rock gas recovering device as claimed in claim 1; It is characterized in that: the bottom of the hard cylindrical shell (15) of gas holder (9) and rubber tube (14) bottom is closely fixing, between hard cylindrical shell (15) top and rubber tube (14) top, between hard cylindrical shell (15) sidewall and rubber tube (14) sidewall certain distance is arranged.

Images