CN210528453U

CN210528453U - Oil gas recovery tanker aircraft

Info

Publication number: CN210528453U
Application number: CN201921563273.1U
Authority: CN
Inventors: 孙琳
Original assignee: Guizhou Tianding New Energy Co ltd
Current assignee: Guizhou qingheyue Energy Development Co.,Ltd.
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-05-15
Anticipated expiration: 2029-09-19

Abstract

An oil gas recovery oiling machine relates to the field of oiling equipment, and is internally provided with a relatively independent oil circuit and an independent gas circuit, wherein the oil circuit is used for conveying methanol gasoline or ethanol gasoline during oiling. The gas circuit is used for pumping back the volatilized oil gas for recovery when oiling. The inventor finds that methanol and ethanol in methanol gasoline or ethanol gasoline have higher water absorbability compared with common gasoline, and the oil gas can contain higher moisture when being directly recovered, so that the purity of the oil gas is lowered, and the corrosion to an air extraction pipeline is serious. Aiming at the problem, the oil gas recovery oiling machine is also provided with a first drying chamber for storing a drying agent in the accommodating cavity. The oil gas that withdraws is firstly through drying in first drying chamber, is carrying out follow-up transport, has not only guaranteed the purity of oil gas, has reduced the degree of difficulty of aftertreatment, has still prolonged the life of aspiration line.

Description

Oil gas recovery tanker aircraft

Technical Field

The utility model relates to a refueling equipment field particularly, relates to an oil gas recovery tanker aircraft.

Background

The methanol gasoline and the ethanol gasoline are novel environment-friendly fuels which are prepared by national standard gasoline, methanol or ethanol and additives according to a certain volume (mass) ratio through a strict flow, are fuel substitutes for automobiles and are important components of new energy. The methanol gasoline and the ethanol gasoline are more environment-friendly, and compared with common gasoline, the methanol gasoline and the ethanol gasoline have lower cost and are more substantial for consumers. Therefore, methanol gasoline and ethanol gasoline have received widespread attention in recent years.

The oil gas recovery technology of the gas station is a technology which is relatively popular, and the application of an oil gas recovery oil gun and an oil gas recovery oiling machine can be seen in many gas stations. However, the existing oil gas recovery refueling gun and oil gas recovery refueling machine are designed for common gasoline and are not suitable for emerging products such as methanol gasoline and ethanol gasoline.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil gas recovery tanker aircraft, its mainly used methyl alcohol petrol, the recovery of ethanol petrol, it is not only effectual to retrieve, and the gas purity of retrieving is higher moreover, has reduced the degree of difficulty of aftertreatment.

The embodiment of the utility model is realized like this:

an oil gas recovery oiling machine comprises an oiling machine main body and an oil storage tank, wherein the oiling machine main body is connected with an oil gas recovery oiling gun through an oil conveying pipe; the oil delivery pipe comprises an outer pipe and an inner pipe which are sleeved with each other, an air exhaust channel for pumping oil gas is formed in the inner pipe, and an oil delivery channel for delivering gasoline is formed between the outer pipe and the inner pipe;

an accommodating cavity is formed in the oiling machine main body, and an oil pump, an oil-gas recovery pump, a first drying chamber for storing a drying agent and an oil-gas separation valve are arranged in the accommodating cavity; the oil storage tank is provided with an oil supply pipeline and an air return pipeline, one end of the oil supply pipeline extends below the liquid level in the oil storage tank, and the other end of the oil supply pipeline is communicated with the oil delivery channel through the oil pump and the oil-gas separation valve in sequence; one end of the air return pipeline extends above the liquid level in the oil storage tank, and the other end of the air return pipeline is communicated with the air extraction channel through the oil gas recovery pump, the first drying chamber and the oil gas separation valve in sequence.

Further, in other preferred embodiments of the present invention, the first drying chamber includes a first air inlet and a first air outlet, the first air inlet is communicated with the oil-gas separation valve, and the first air outlet is communicated with the oil storage tank; a first screen is arranged at the first air inlet, and a second screen is arranged at the first air inlet.

Further, in other preferred embodiments of the present invention, a first opening for taking and placing the drying agent is disposed on the chamber wall of the first drying chamber, a first cover is disposed at the first opening for covering the first opening, and the first cover is detachably connected to the first drying chamber.

Further, in other preferred embodiments of the present invention, an oil-gas filter is further disposed between the oil-gas separation valve and the first drying chamber.

Further, in the other preferred embodiments of the present invention, a flow meter is further disposed between the oil pump and the oil-gas separation valve, and the oil pump, the flow meter and the built-in control unit of the oiling machine main body are electrically connected.

Further, in the other preferred embodiments of the present invention, a proportional valve for adjusting the oil-gas recovery ratio is further disposed between the first drying chamber and the oil-gas recovery pump, and the proportional valve is electrically connected to the built-in control unit.

Further, in other preferred embodiments of the present invention, the oil gas recovery refueling gun includes a housing, the housing has a head portion and a tail portion opposite to each other, the head portion is provided with a nozzle, and the tail portion is communicated with the refueling machine main body through an oil pipe; an oil cavity is arranged in the shell, and one end of the oil cavity close to the tail part is communicated with the oil conveying channel; one end of the oil nozzle extends into the oil cavity to form an oil inlet, and a control valve for controlling the opening and the closing of the oil inlet is arranged at the oil inlet; the oil nozzle is sleeved with an air pumping shell, an air pumping gap is formed between the air pumping shell and the oil nozzle, and an air pumping hole penetrating through the air pumping shell is formed in the air pumping shell; the shell is also internally provided with a second drying chamber for storing a drying agent, the second drying chamber is provided with a second air inlet and a second air outlet, the second air inlet is communicated with the air exhaust hole through a first air exhaust pipe, and the second air outlet is communicated with the air exhaust channel through a second air exhaust pipe.

Further, in other preferred embodiments of the present invention, a third screen for preventing the drying agent from entering the first exhaust pipe is disposed at the second air inlet; and a fourth screen for preventing the drying agent from entering the second exhaust pipe is arranged at the second air outlet.

Further, in other preferred embodiments of the present invention, a second opening penetrating through the housing is provided on the housing, and the second opening is communicated with the second drying chamber; the second opening is provided with a second cover body used for covering the second opening, and the second cover body is detachably connected with the shell.

Further, in other preferred embodiments of the present invention, an elastic sealing sleeve is sleeved outside the air exhaust shell.

The embodiment of the utility model provides a beneficial effect is:

the embodiment of the utility model provides an oil gas recovery tanker aircraft, its inside relatively independent oil circuit and gas circuit of being provided with, the oil circuit is used for carrying methyl alcohol petrol or ethanol petrol when refueling. The gas circuit is used for pumping back the volatilized oil gas for recovery when oiling. The inventor finds that methanol and ethanol in methanol gasoline or ethanol gasoline have higher water absorbability compared with common gasoline, and the oil gas can contain higher moisture when being directly recovered, so that the purity of the oil gas is lowered, and the corrosion to an air extraction pipeline is serious. Aiming at the problem, the oil gas recovery oiling machine is also provided with a first drying chamber for storing a drying agent in the accommodating cavity. The oil gas that withdraws is firstly through drying in first drying chamber, is carrying out follow-up transport, has not only guaranteed the purity of oil gas, has reduced the degree of difficulty of aftertreatment, has still prolonged the life of aspiration line.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of an oil and gas recovery refueling machine according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a first drying chamber of an oil and gas recovery refueling machine provided by an embodiment of the invention;

fig. 3 is a cross-sectional view of an oil-gas recovery refueling gun of the oil-gas recovery refueling machine according to an embodiment of the present invention;

fig. 4 is an enlarged schematic view of an oil and gas recovery refueling machine at IV according to an embodiment of the present invention.

Icon: 10-oil gas recovery oiling machine; 100-a fuel dispenser body; 110-a housing chamber; 120-an oil pump; 130-oil gas recovery pump; 140-a first drying chamber; 141-a first air inlet; 142-a first air outlet; 143-a first screen; 144-a second screen; 145-a first cover; 150-oil gas separation valve; 160-a filter; 170-proportional valve; 180-a flow meter; 190-built-in control unit; 200-an oil storage tank; 210-an oil supply conduit; 220-air return pipeline; 300-oil gas recovery oil gun; 310-a housing; 311-a hand-held part; 312-hand protection part; 321-a nozzle tip; 322-an oil chamber; 323-oil inlet; 324-a control valve; 3241-valve body; 3242-valve stem; 3243-lever member; 3243 a-hinged end; 331-an air-extracting shell; 332-evacuation gap; 333-air extraction holes; 334-a second drying chamber; 3341-second air inlet; 3342-second vent; 3343-third screen; 3344-fourth screen; 3345-second cover; 335-a first extraction duct; 336-a second extraction duct; 337-elastic sealing sleeve; 400-an oil delivery pipe; 410-an outer tube; 420-an inner tube; 430-an air exhaust channel; 440-oil transfer channel.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

The present embodiment provides an oil vapor recovery fuel dispenser 10, which is shown in fig. 1, and includes a fuel dispenser body 100 and a fuel tank 200, the fuel dispenser body 100 being connected to an oil vapor recovery fuel gun 300 through an oil pipe 400. The oil delivery pipe 400 includes an outer pipe 410 and an inner pipe 420 that are sleeved with each other, an air suction passage 430 for drawing back oil gas is formed in the inner pipe 420, and an oil delivery passage 440 for delivering gasoline is formed between the outer pipe 410 and the inner pipe 420.

As shown in fig. 1, a receiving chamber 110 is formed inside the fuel dispenser body 100, and an oil pump 120, an oil-gas recovery pump 130, a first drying chamber 140 for storing a desiccant, and an oil-gas separation valve 150 are disposed inside the receiving chamber 110. The oil storage tank 200 is provided with an oil supply line 210 and a return air line 220, one end of the oil supply line 210 extends below the liquid level in the oil storage tank 200, and the other end is communicated with the oil delivery passage 440 through the oil pump 120 and the oil-gas separation valve 150 in sequence. The oil pump 120 provides power for the transportation of ethanol gasoline or methanol gasoline (hereinafter referred to as gasoline) to transport the gasoline in the oil storage tank 200 to the oil transportation channel 440, and then the gasoline is fed to the vehicle through the oil transportation channel 440 and the oil gas recovery fuel gun 300. One end of the air return pipeline 220 extends into the oil storage tank 200 above the liquid level, and the other end is communicated with the air extraction channel 430 through the oil gas recovery pump 130, the first drying chamber 140 and the oil gas separation valve 150 in sequence. The oil gas recovery pump 130 generates a certain negative pressure, so that oil gas dissipated in the refueling process can be pumped into the air suction passage 430 by the oil gas recovery refueling gun 300, then enters the air return pipeline 220 through the separation of the oil gas separation valve 150, and returns to the oil storage tank 200 for storage after being dried by the first drying chamber 140.

As shown in fig. 1 and 2, the first drying chamber 140 includes a first inlet port 141 and a first outlet port 142, the first inlet port 141 is communicated with the oil-gas separation valve 150, and the first outlet port 142 is communicated with the oil storage tank 200. A first screen 143 is disposed at the first air inlet 141, and a second screen 144 is disposed at the first air inlet 141. The first and

second screens

143, 144 may limit the position of the desiccant to prevent it from entering the return air duct 220 and causing a blockage or contamination of the recovered oil. A first opening (not shown) for taking and placing the drying agent is disposed on a wall of the first drying chamber 140, a first cover 145 is disposed at the first opening to cover the first opening, and the first cover 145 is detachably connected to the first drying chamber 140. By opening the first cover 145, the desiccant in the first drying chamber 140 can be replaced conveniently, and the drying effect can be maintained all the time.

An oil-gas filter 160 is also disposed between the oil-gas separation valve 150 and the first drying chamber 140. The oil and gas filter 160 may perform a preliminary purification of the recovered oil and gas to remove particulate impurities therefrom. Further, a proportional valve 170 is arranged between the first drying chamber 140 and the oil-gas recovery pump 130, and the proportional valve 170 is electrically connected with the built-in control unit 190 of the fuel dispenser main body 100. The proportional valve 170 can be conveniently set by the built-in control unit 190 of the fuel dispenser body 100, so that the oil-gas recovery ratio can be adjusted according to actual conditions.

In addition, a flow meter 180 is disposed between the oil pump 120 and the oil-gas separation valve 150, and the oil pump 120, the flow meter 180 and the built-in control unit 190 are electrically connected. The built-in control unit 190 can monitor the refueling process according to the flow data fed back by the flow meter 180, and control the start and stop of the oil pump 120.

Further, as shown in fig. 3, the vapor recovery nozzle 300 of the present embodiment includes a housing 310, the housing 310 having a head portion provided with a nozzle 321 and a tail portion communicating with the fuel dispenser body 100 through a fuel line 400.

An oil chamber 322 is arranged in the shell 310, and one end of the oil chamber 322 close to the tail part is communicated with the oil conveying channel 440. One end of the oil nozzle 321 extends into the oil chamber 322 to form an oil inlet 323, and a control valve 324 for controlling the opening and closing of the oil inlet 323 is disposed at the oil inlet 323. When oil is added, the control valve 324 is opened, and the gasoline enters the oil cavity 322 from the oil delivery channel 440, enters the oil nozzle 321 from the oil inlet 323, and is output from the other end of the oil nozzle 321.

As shown in fig. 3, the control valve 324 used in the present embodiment is similar to most of the existing fuel guns, and includes a valve body 3241, a valve rod 3242 and a lever member 3243, wherein the valve body 3241 is disposed in the oil chamber 322 at the oil inlet 323 to cover the oil inlet 323. The valve rod 3242 has one end connected to the valve body 3241 and the other end extending through the housing 310 to the outside of the housing 310. The lever 3243 includes a hinged end 3243a hingedly connected to the housing 310. The valve rod 3242 is slidably connected with the housing 310, when oil needs to be added, the lever member 3243 rotates around the hinged end 3243a and approaches the housing 310, the lever member 3243 contacts with the valve rod 3242 and pushes the valve rod 3242 to move towards the valve body 3241, the valve body 3241 is jacked up, an oil passing gap (not shown) is formed between the valve body 3241 and the oil inlet 323, and gasoline can enter the oil nipple 321 through the oil passing gap. When the refueling is finished, the lever member 3243 rotates around the hinged end 3243a and moves away from the housing 310, at this time, the lever member 3243 is separated from the valve rod 3242, and the valve body 3241 is pushed by the methanol gasoline or the ethanol gasoline to close the oil inlet 323 again.

As shown in fig. 3 and 4, the oil nipple 321 is externally sleeved with an air-extracting casing 331, an air-extracting gap 332 is formed between the air-extracting casing 331 and the oil nipple 321, and the air-extracting casing 331 is provided with an air-extracting hole 333 penetrating the air-extracting casing 331. The housing 310 is further provided therein with a second dry chamber 334 for storing a desiccant, the second dry chamber 334 is provided with a second air inlet 3341 and a second air outlet 3342, the second air inlet 3341 is communicated with the air pumping hole 333 through a first air pumping pipe 335, and the second air outlet 3342 is communicated with the air pumping channel 430 through a second air pumping pipe 336. As described above, the vapor recovery pump 130 may generate a certain negative pressure in the pumping channel 430, so that the vapor escaping during refueling may be sucked into the first pumping pipe 335 through the pumping hole 333 and then into the second drying chamber 334 through the second intake port 3341. The second drying chamber 334 is filled with a drying agent, and the oil and gas entering the second drying chamber 334 is dried and then pumped out to the second pumping pipe 336 through the second air outlet 3342, and further transported away through the pumping channel 430. Preferably, a third screen 3343 is provided at the second air inlet 3341; a fourth screen 3344 is disposed at the second air outlet 3342. The third screen 3343 and the fourth screen 3344 may prevent desiccant from entering the first exhaust conduit 335 and the second exhaust conduit 336 to prevent the desiccant from plugging the conduits or from being pumped with the hydrocarbon to contaminate the recovered hydrocarbon.

A second opening (not labeled) penetrating through the housing 310 is formed in the housing 310, and the second opening is communicated with the second drying chamber 334; the second opening is provided with a second cover 3345 for covering the second opening, and the second cover 3345 is detachably connected with the housing 310. By opening the second cover 3345, the desiccant in the second drying chamber 334 can be replaced easily, and the drying effect can be maintained all the time. It is worth noting that the oil and gas recovery oil gun 300 with the second drying chamber 334 is adopted in this embodiment, in order to improve the drying effect by the dual drying of the second drying chamber 334 and the first drying chamber 140, in other embodiments of the present invention, when the requirement for the drying effect is not high, the oil and gas recovery oil gun 300 in the prior art can also be adopted, and only the first drying chamber 140 is used for drying.

In the present embodiment, the housing 310 includes a handle 311 and a hand guard 312, and an active region for the lever 3243 to move is formed between the handle 311 and the hand guard 312. When refueling, the user holds the hand-held portion 311 and the lever member 3243 with a hand to control the movement of the lever member 3243. Optionally, the oil chamber 322 is located in the hand-held portion 311, and the first exhaust pipe 335, the second exhaust pipe 336 and the second drying chamber 334 are all located in the hand-held portion 312, so that the oil path and the air path can be relatively separated, mutual influence can be avoided, and respective overhaul is facilitated. Meanwhile, the opening is arranged on one side of the hand guard part 312, which is far away from the hand holding part 311, so that the drying agent can be conveniently taken and put.

Further, an elastic sealing sleeve 337 is sleeved outside the air exhaust casing 331. When the oil nozzle 321 extends into the oil tank for oil filling, the elastic sealing sleeve 337 is in elastic contact with the oil tank shell, and a relatively closed space is formed in the elastic sealing sleeve 337 to prevent oil gas from escaping and improve the air suction effect.

To sum up, the embodiment of the utility model provides an oil gas recovery tanker aircraft 10, its inside relatively independent oil circuit and the gas circuit of being provided with, the oil circuit is used for carrying methyl alcohol petrol or ethanol petrol when refueling. The gas circuit is used for pumping back the volatilized oil gas for recovery when oiling. The inventor finds that methanol and ethanol in methanol gasoline or ethanol gasoline have higher water absorbability compared with common gasoline, and the oil gas can contain higher moisture when being directly recovered, so that the purity of the oil gas is lowered, and the corrosion to an air extraction pipeline is serious. In this regard, the vapor recovery fuel dispenser 10 is further provided with a first drying chamber 140 for storing a desiccant in the receiving cavity 110. The pumped oil gas is firstly dried in the first drying chamber 140 and then subsequently conveyed, so that the purity of the oil gas is ensured, the difficulty of post-treatment is reduced, and the service life of the pumping pipeline is prolonged.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The oil gas recovery oiling machine is characterized by comprising an oiling machine main body and an oil storage tank, wherein the oiling machine main body is connected with an oil gas recovery oiling gun through an oil conveying pipe; the oil delivery pipe comprises an outer pipe and an inner pipe which are sleeved with each other, an air extraction channel for pumping oil gas is formed in the inner pipe, and an oil delivery channel for delivering gasoline is formed between the outer pipe and the inner pipe;

an accommodating cavity is formed in the oiling machine main body, and an oil pump, an oil-gas recovery pump, a first drying chamber for storing a drying agent and an oil-gas separation valve are arranged in the accommodating cavity; the oil storage tank is provided with an oil supply pipeline and an air return pipeline, one end of the oil supply pipeline extends below the liquid level in the oil storage tank, and the other end of the oil supply pipeline is communicated with the oil delivery channel through the oil pump and the oil-gas separation valve in sequence; one end of the air return pipeline extends to a position above the liquid level in the oil storage tank, and the other end of the air return pipeline is communicated with the air exhaust channel through the oil gas recovery pump, the first drying chamber and the oil gas separation valve in sequence.

2. The vapor recovery fuel dispenser of claim 1, wherein said first drying chamber includes a first inlet port and a first outlet port, said first inlet port being in communication with said vapor separation valve, said first outlet port being in communication with said oil storage tank; the first air inlet is provided with a first screen, and the first air inlet is provided with a second screen.

3. The vapor recovery fuel dispenser of claim 2, wherein a first opening for access of desiccant is provided in the chamber wall of the first drying chamber, a first cover is provided at the first opening to cover the first opening, and the first cover is detachably connected to the first drying chamber.

4. The oil vapor recovery fuel dispenser of claim 3, further comprising an oil vapor filter disposed between said oil vapor separation valve and said first drying chamber.

5. The oil and gas recovery fuel dispenser of claim 4, further comprising a flow meter disposed between the oil pump and the oil and gas separation valve, the oil pump and the flow meter being electrically connected to a built-in control unit of the fuel dispenser body.

6. The oil vapor recovery fuel dispenser of claim 5, further comprising a proportional valve disposed between the first drying chamber and the oil vapor recovery pump for adjusting an oil vapor recovery ratio, the proportional valve being electrically connected to the built-in control unit.

7. The vapor recovery fuel dispenser of claim 1, wherein said vapor recovery fuel gun includes a housing having opposed head and tail portions, said head portion being provided with a fuel nipple, said tail portion being in communication with said fuel dispenser body through said fuel delivery tube; an oil cavity is arranged in the shell, and one end of the oil cavity close to the tail part is communicated with the oil transportation channel; one end of the oil nozzle extends into the oil cavity to form an oil inlet, and a control valve for controlling the opening and the closing of the oil inlet is arranged at the oil inlet; an air pumping shell is sleeved outside the oil nozzle, an air pumping gap is formed between the air pumping shell and the oil nozzle, and an air pumping hole penetrating through the air pumping shell is formed in the air pumping shell; the shell is internally provided with a first drying chamber used for storing a drying agent, the first drying chamber is provided with a first air inlet and a first air outlet, the first air inlet is communicated with the air exhaust hole through a first air exhaust pipe, and the first air outlet is communicated with the air exhaust channel through a first air exhaust pipe.

8. The vapor recovery fuel dispenser of claim 7, wherein a third screen is provided at the second air inlet for preventing desiccant from entering the first air extraction tube; and a fourth screen for preventing the drying agent from entering the second air exhaust pipe is arranged at the second air outlet.

9. The vapor recovery fuel dispenser of claim 8, wherein said housing is provided with a second opening therethrough, said second opening communicating with said second drying chamber; the second opening is provided with a second cover body used for covering the second opening, and the second cover body is detachably connected with the shell.

10. The vapor recovery fuel dispenser of claim 9, wherein an elastomeric boot is fitted over the outer side of said pumping housing.