LNG (Liquefied Natural Gas) skid-mounted filling device of LNG filling station

Abstract

The utility model discloses an LNG (Liquefied Natural Gas) skid-mounted gas filling device of an LNG filling station, which relates to the technical field of LNG injection and comprises a bottom plate, a liquid storage tank is arranged at the top end of the bottom plate, a gas filling device is attached to the left side of the liquid storage tank, three groups of heating pipes are arranged in the liquid storage tank, and the lower ends of the three groups of heating pipes are communicated with water outlet pipes. First valves are arranged on the outer surfaces of the front sides of the three sets of water outlet pipes, the three sets of water outlet pipes communicate with a first connecting pipe through water collecting pieces, the first connecting pipe communicates with the left end of a heating box through a first water pump, and the right end of the heating box communicates with a second connecting pipe through a second water pump. Through cooperation of the three sets of temperature rising pipes, the water outlet pipe, the first valve, the water collecting piece, the first water pump, the heating box, the second water pump and the second connecting pipe, indirect heating of the liquefied natural gas liquid storage box is achieved, the problem that the temperature difference is too large possibly caused by direct heating of the liquid storage box is avoided, and it is ensured that the heating process is stable; and the risk that the liquid storage tank explodes due to rapid temperature rise is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to LNG injection technology field, concretely relates to a LNG gas station LNG pry installation gas device. BACKGROUND

[0002] LNG (Liquefied Natural Gas, liquefied natural gas) main component is methane, is recognized as the cleanest fossil energy on the earth, with no color, no smell, non-toxic and no corrosive, its volume is about 1 / 625 of the same amount of gaseous natural gas volume, the quality of liquefied natural gas is only about 45% of the same volume of water, its manufacturing process is first purifying the natural gas produced by gas field, after a series of ultralow temperature liquefaction, using the liquefied natural gas ship transportation, the air pollution is very small after the combustion of liquefied natural gas, and the heat released is large, so liquefied natural gas is a kind of relatively advanced energy.

[0003] When the LNG liquefied natural gas pry installation gas device is not used, it may be affected by the environment, resulting in the temperature inside the liquid storage tank being too low, which may cause the liquefied natural gas to solidify, and the pry installation gas device currently used on the market mostly directly heats the liquid storage tank, which may cause the temperature difference between the inside and outside of the liquid storage tank to be too large or the heating speed to be too fast, resulting in the explosion of the liquid storage tank, thereby reducing the practicability of the LNG liquefied natural gas pry installation gas device. UTILITY MODEL CONTENTS

[0004] To solve the above technical problems, an LNG gas station LNG pry installation gas device is provided, which solves the problem of the practicability of the LNG liquefied natural gas pry installation gas device being reduced due to the temperature inside the liquid storage tank being too low when the LNG liquefied natural gas pry installation gas device is not used, which may cause the liquefied natural gas to solidify, and the pry installation gas device currently used on the market mostly directly heats the liquid storage tank, which may cause the temperature difference between the inside and outside of the liquid storage tank to be too large or the heating speed to be too fast, resulting in the explosion of the liquid storage tank.

[0005] To achieve the above purposes, the utility model adopts the technical scheme that:

[0006] An LNG gas station LNG pry installation gas device, comprising a bottom plate, a liquid storage tank is arranged at the top end of the bottom plate, and a gas filling device is attached to the left side of the liquid storage tank.

[0007] The inside of the liquid storage tank is provided with three groups of temperature raising pipes, the low ends of the three groups of temperature raising pipes are communicated with water outlet pipes, the front outer surfaces of the three groups of water outlet pipes are provided with first valves, and the three groups of water outlet pipes are communicated with a first connecting pipe through a water collecting element, and the first connecting pipe is communicated with the left end of a heating box through a first water pump.

[0008] Preferably, the front end of the liquid storage tank is communicated with the gas filling device through a third connecting pipe, and the outer surface of the third connecting pipe is provided with a third valve.

[0009] Preferably, the heating tank is arranged at the top end of the bottom plate, the inside of the heating tank is provided with two groups of heating pieces, and the right low end of the heating tank is communicated with the water inlet pipe through a second connecting pipe.

[0010] Preferably, the water inlet pipe is provided with three groups of water inlets, and the water inlet pipe is communicated with the right ends of the three groups of temperature rising pipes.

[0011] Preferably, the right end of the heating tank is communicated with the second connecting pipe through a second water pump, and the other end of the second connecting pipe is communicated with the water inlet pipe.

[0012] Preferably, the top end of the water inlet pipe is provided with three groups of second valves.

[0013] Preferably, the left side of the gas filling device is provided with a gas filling head.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] First, through the cooperation of the three groups of temperature rising pipes, the water outlet pipe, the first valve, the water collecting piece, the first water pump, the heating tank, the second water pump and the second connecting pipe, indirect heating of the liquefied natural gas liquid storage tank is realized, the problem of too large temperature difference caused by direct heating of the liquid storage tank is avoided, the stability and safety of the heating process are ensured, the risk of explosion of the liquid storage tank due to rapid temperature rise is effectively reduced, secondly, through the two groups of heating pieces arranged in the heating tank, the heating temperature control and adjustment can be realized by controlling the power and working time of the heating pieces, the uniformity and stability of the heating process are ensured, and the safety hidden danger caused by too fast heating speed is avoided, and thirdly, through the communication of the three groups of water inlets, the corresponding second valves and the right ends of the temperature rising pipes, the temperature rising pipes are provided with flexible water inlet selection, the heating intensity and range can be adjusted according to actual needs, so that the heating effect is ensured, and the practicability and flexibility of the gas filling device are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an appearance structure schematic view of the utility model;

[0017] Figure 2 It is a zero-one perspective structure schematic view of the utility model;

[0018] Figure 3 It is an internal structure schematic view of the utility model;

[0019] Figure 4 It is a heating mechanism schematic view of the utility model.

[0020] The reference signs in the drawings are:

[0021] 1, bottom plate;

[0022] 2, liquid storage tank; 201, heating pipe; 202, water outlet pipe; 203, water collecting part; 204, first valve; 205, first connecting pipe; 206, first water pump; 207, heating tank; 208, heating part; 209, second water pump; 210, second connecting pipe; 211, water inlet pipe; 212, second valve;

[0023] 3, gas filling device; 301, third connecting pipe; 302, third valve; 303, gas filling head. DETAILED DESCRIPTION

[0024] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments in the following description are only as examples, and those skilled in the art can think of other obvious modifications.

[0025] Referring to Figures 1-2 As shown in the figure, an LNG gas station LNG pry filling device, comprising a bottom plate 1, the top end of the bottom plate 1 is provided with a liquid storage tank 2, the left side of the liquid storage tank 2 is attached with a gas filling device 3, the inside of the liquid storage tank 2 is provided with three groups of heating pipes 201, the low end of the three groups of heating pipes 201 is communicated with a water outlet pipe 202, the front side outer surface of the three groups of water outlet pipes 202 is provided with a first valve 204, and the three groups of water outlet pipes 202 are communicated with the first connecting pipe 205 through the water collecting part 203, the first connecting pipe 205 is communicated with the left end of the heating tank 207 through the first water pump 206,

[0026] In the present scheme, when the water temperature in the heating pipe 201 gradually decreases due to long-time heating of LNG, the low-temperature water in the heating pipe 201 is pumped out through the cooperation of the first water pump 206 and the first connecting pipe 205 with the water collecting part 203, and is pumped into the heating tank 207 for re-heating, ensuring the continuous stability of the water temperature in the heating pipe 201, improving the energy utilization efficiency, and reducing the energy consumption cost

[0027] Referring to Figures 1-4 As shown in the figure, the heating tank 207 is arranged at the top end of the bottom plate 1, the inside of the heating tank 207 is provided with two groups of heating parts 208, the right end of the heating tank 207 is communicated with the second connecting pipe 210 through the second water pump 209, the other end of the second connecting pipe 210 is communicated with the water inlet pipe 211, the water inlet pipe 211 is provided with three groups of water inlets, the top end of the water inlet pipe 211 is provided with three groups of second valves 212, and the water inlet pipe 211 is communicated with the right end of the three groups of heating pipes.

[0028] In the scheme, two groups of heating pieces 208 arranged in the heating box 207 heat the water, so that the LNG changes from liquid state to gaseous state before being filled, the heated water enters the second connecting pipe 210 through the outlet of the second water pump 209, and then enters the three groups of heating pipes 201 through the three groups of water inlets of the water inlet pipe 211, so that the heated water is quickly distributed, and the heating pipes 201 can uniformly and fully receive heat, so that the heating efficiency of the LNG is effectively improved.

[0029] Referring to Figures 1-3 As shown in the figure, the front end of the liquid storage tank 2 is communicated with the gas filling device 3 through the third connecting pipe 301, the outer surface of the third connecting pipe 301 is provided with the third valve 302, and the left side of the gas filling device 3 is provided with the gas filling head 303.

[0030] In the scheme, the third valve 302 is arranged on the third connecting pipe 301, the gas filling flow is controlled, the gas filling head 303 on the left side of the gas filling device 3 provides convenient and efficient LNG filling service for users, and the needs of the staff are met.

[0031] The working principle of the utility model is as follows: first, the heating pieces 208 in the heating box 207 heat the water, the heated water is pumped to the second connecting pipe 210 through the second water pump 209, and then is distributed to the three groups of water inlets of the water inlet pipe 211 and flows into the three groups of heating pipes 201, along with the continuous heating process, the water temperature in the heating pipes 201 gradually decreases, the first water pump 206 is started, the low-temperature water in the heating pipes 201 is pumped out through the first connecting pipe 205 and the water collecting piece 203, and then the water is pumped into the heating box 207 again through the first connecting pipe 205 for re-heating, so that the energy utilization efficiency is improved, when the LNG is fully heated and converted into gaseous state, the LNG flows into the gas filling device 3 through the third connecting pipe 301, and the third valve 302 arranged on the third connecting pipe 301 can control the gas filling flow to meet different filling needs.

[0032] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only the principles of the utility model, and various changes and improvements can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the claimed utility model. The protection scope required by the utility model is defined by the appended claims and their equivalents.

Claims

1. An LNG skid-mounted refueling device for an LNG refueling station, comprising a base plate (1), characterized in that, The top end of the bottom plate (1) is provided with a liquid storage tank (2), and the left side of the liquid storage tank (2) is attached with a gas adding device (3). The inside of the liquid storage tank (2) is provided with three groups of heating pipes (201), the low ends of the three groups of heating pipes (201) are communicated with water outlet pipes (202), the front outer surfaces of the three groups of water outlet pipes (202) are provided with first valves (204), and the three groups of water outlet pipes (202) are communicated with a first connecting pipe (205) through a water collecting piece (203), and the first connecting pipe (205) is communicated with the left end of a heating tank (207) through a first water pump (206).

2. The LNG skid-mounted fueling device of claim 1, wherein: The front end of the liquid storage tank (2) is communicated with the gas adding device (3) through a third connecting pipe (301), and the outer surface of the third connecting pipe (301) is provided with a third valve (302).

3. The LNG skid-mounted fueling device of claim 1, wherein: The heating tank (207) is arranged at the top end of the bottom plate (1), the inside of the heating tank (207) is provided with two groups of heating pieces (208), and the right low end of the heating tank (207) is communicated with a water inlet pipe (211) through a second connecting pipe (210).

4. The LNG skid-mounted fueling device of claim 3, wherein: The water inlet pipe (211) is provided with three groups of water inlets, and the water inlet pipe (211) is communicated with the right ends of the three groups of heating pipes (201).

5. The LNG skid-mounted fueling device of claim 1, wherein: The right end of the heating tank (207) is communicated with the second connecting pipe (210) through a second water pump (209), and the other end of the second connecting pipe (210) is communicated with the water inlet pipe (211).

6. The LNG skid-mounted fueling device of claim 4, wherein: The top end of the water inlet pipe (211) is provided with three groups of second valves (212).

7. The LNG skid-mounted fueling device of claim 1, wherein: The left side of the gas adding device (3) is provided with a gas adding head (303).

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