Pressure regulating and metering device based on liquefied natural gas and compressed natural gas

Abstract

The present invention discloses a pressure regulating and metering device based on liquefied natural gas and compressed natural gas, including: an air temperature vaporizer, a radiant heat device, a first manifold, a pressure regulator, and a gas turbine flowmeter; and also including: a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline, a sixth pipeline, a seventh pipeline, and a high-pressure hose, wherein a first valve and a second valve are sequentially arranged on the first pipeline, the third valve is arranged on the third pipeline, the fourth valve is arranged on the second pipeline, and the fifth valve is arranged on the fifth pipeline. The present invention can perform both vaporization auxiliary heat pressure regulating and metering of liquefied natural gas and pressure regulating and metering of compressed natural gas by controlling the valve, and can use vaporization auxiliary heat pressure regulating and metering of liquefied natural gas or pressure regulating and metering of compressed natural gas according to different needs. The present invention can make the output of natural gas fuel stable, the use method more flexible, and easy to maintain.

Description

Technical Field

[0001] The present invention relates to the field of pressure regulation and metering of liquefied natural gas and compressed natural gas, and more specifically, to a pressure regulation and metering device based on liquefied natural gas and compressed natural gas. Background Art

[0002] Natural gas fuel has a high unit calorific value and emits few pollutants during combustion, and is increasingly widely used in daily life. Liquefied natural gas and compressed natural gas in natural gas fuel need to be processed before use, and the pressure and flow of the natural gas fuel output after processing must be stable.

[0003] Therefore, a well-designed liquefied natural gas and compressed natural gas pressure regulating and metering device can make the natural gas fuel output stable, the usage more flexible, and the maintenance easier. Summary of the invention

[0004] In view of this, the present invention provides a pressure regulating and metering device based on liquefied natural gas and compressed natural gas, characterized in that it includes: an air temperature vaporizer, a radiant heater, a first manifold, a pressure regulator, and a gas turbine flowmeter;

[0005] Also includes: a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline, a sixth pipeline, a seventh pipeline and a high-pressure hose;

[0006] The air temperature vaporizer has an air temperature vaporizer air inlet and an air temperature vaporizer air outlet, the air temperature vaporizer air inlet is connected to the liquefied natural gas air inlet, and the air temperature vaporizer air outlet is connected to the first pipeline;

[0007] The radiator is provided with a first air inlet, a second air inlet, a first air outlet, and a second air outlet at one end away from the ground, wherein the first air inlet is connected to the first pipe, the second air inlet is connected to the high-pressure hose, the first air outlet is connected to the third pipe, and the second air outlet is connected to the fourth pipe;

[0008] One end of the high-pressure hose is provided with a first compressed natural gas inlet, and the other end is connected to the second inlet. The high-pressure hose is provided with a sixth valve and a seventh valve in sequence, and the seventh valve is arranged near one end of the first compressed natural gas inlet;

[0009] One end of the first pipeline is connected to the air outlet of the air temperature vaporizer, and the other end is connected to the first air inlet. A first valve and a second valve are sequentially arranged on the first pipeline, and the first valve and the second valve are connected to the second pipeline;

[0010] One end of the third pipeline is connected to the first air outlet, and the other end is connected to the first manifold, and the third pipeline is provided with the third valve;

[0011] One end of the second pipeline is connected to the first pipeline between the first valve and the second valve, and the other end is connected to the third pipeline between the third valve and the first manifold, and a fourth valve is provided on the second pipeline;

[0012] One end of the fourth pipeline is connected to the second air outlet, and the other end is connected to the fifth pipeline. The fourth pipeline is provided with a pneumatic shut-off valve and a high-pressure filter in sequence, and the high-pressure filter is close to one end of the fifth pipeline;

[0013] One end of the first manifold is connected to the third pipeline, and the other end is connected to the sixth pipeline, and the fifth pipeline is connected between the third pipeline and the sixth pipeline, and a relief valve is provided on the first manifold;

[0014] One end of the fifth pipeline is connected to the fourth pipeline, and the other end is connected to the first manifold between the third pipeline and the sixth pipeline, and a fifth valve is provided on the fifth pipeline;

[0015] One end of the sixth pipeline is connected to the first manifold, and the other end is connected to the seventh pipeline, and the pressure regulator is provided on the sixth pipeline;

[0016] One end of the seventh pipeline is connected to the sixth pipeline, and the other end is provided with an air outlet. The seventh pipeline is provided with a filter, an overpressure cut-off valve, and the gas turbine flowmeter in sequence. The gas turbine flowmeter is arranged near one end of the air outlet.

[0017] Preferably, it also includes a second manifold,

[0018] The fourth pipeline is connected to the second manifold along a direction parallel to the ground, and the fifth pipeline is connected to the second manifold along a direction perpendicular to the ground.

[0019] Preferably, the number of the fifth pipelines is four, including: a fifth pipeline A, a fifth pipeline B, a fifth pipeline C and a fifth pipeline D. The fifth pipeline A, the fifth pipeline B, the fifth pipeline C and the fifth pipeline D are arranged in parallel, and the fifth pipeline A, the fifth pipeline B, the fifth pipeline C and the fifth pipeline D are all connected to the first manifold at one end and connected to the second manifold at the other end.

[0020] Preferably, the number of the sixth pipelines is two, including: a sixth pipeline A and a sixth pipeline B. The sixth pipeline A and the sixth pipeline B are arranged in parallel. The sixth pipeline A and the sixth pipeline B are both connected to the first manifold at one end and connected to the seventh pipeline at the other end.

[0021] Preferably, it further comprises: an eighth pipeline and a ninth pipeline, wherein one end of the eighth pipeline is connected to the liquefied natural gas inlet, and the other end is connected to the ninth pipeline, and the eighth pipeline is provided with a low-temperature long-axis stop valve, and the number of the low-temperature long-axis stop valves is 10;

[0022] One end of the ninth pipeline is connected to the eighth pipeline, and the other end is connected to the air inlet of the air temperature vaporizer.

[0023] Preferably, there are two eighth pipelines, including: an eighth pipeline A and an eighth pipeline B. The eighth pipeline A and the eighth pipeline B are arranged in parallel, and one end of the eighth pipeline A and the eighth pipeline B are connected to the liquefied natural gas inlet, and the other end is connected to the ninth pipeline, and the eighth pipeline A and the eighth pipeline B completely overlap in a direction perpendicular to the ground.

[0024] Preferably, it further comprises: a bracket, the bracket comprising a bottom frame and a support;

[0025] The pillars include: a first pillar, a second pillar, a third pillar and a fourth pillar;

[0026] The bottom frame includes: an outer frame and an inner frame strip;

[0027] The inner frame strips include: a first frame strip, a second frame strip, a third frame strip, a fourth frame strip and a fifth frame strip;

[0028] The first frame bar is provided with the first support column and the second support column, the second frame bar is provided with the third support column and the fourth support column, and the first support column, the second support column, the third support column and the fourth support column support the air temperature vaporizer;

[0029] The third frame bar and the fourth frame bar support the radiator.

[0030] Preferably, a temperature gauge, a temperature transmitter, a float, a drain valve and a water injection valve are provided at one end of the radiator away from the ground, and a sewage outlet is provided at the side wall of the radiator close to the ground.

[0031] Preferably, the filter is a Y-type filter.

[0032] Preferably, it also includes an auxiliary high-pressure hose, one end of which is connected to the high-pressure hose between the sixth valve and the seventh valve, and the other end is provided with a second compressed natural gas inlet, and the auxiliary high-pressure hose is provided with an eighth valve.

[0033] Compared with the prior art, the pressure regulating and metering device based on liquefied natural gas and compressed natural gas provided by the present invention achieves at least the following beneficial effects:

[0034] 1. The structure of the present invention is reasonably designed, and can be used for both vaporization auxiliary heat pressure regulation metering of liquefied natural gas and pressure regulation metering of compressed natural gas. The vaporization auxiliary heat pressure regulation metering of liquefied natural gas or pressure regulation metering of compressed natural gas can be used according to different needs.

[0035] 2. The pressure regulating and metering device in the present invention can stabilize the pressure and flow of the output natural gas fuel.

[0036] 3. The present invention has a simple structure and is easy to repair and maintain.

[0037] 4. The present invention is provided with a relief valve and multiple valves, which is more secure.

[0038] 5. The present invention is provided with a filter, which can effectively filter out impurities and make it cleaner.

[0039] Of course, any product implementing the present invention does not necessarily need to achieve all of the technical effects described above at the same time.

[0040] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0042] Figure 1 is a schematic diagram of a top view of an embodiment of the present invention;

[0043] Figure 2 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0044] Figure 3 is a schematic diagram of a top view of another embodiment of the present invention;

[0045] Figure 4 is a schematic diagram of the three-dimensional structure of another embodiment of the present invention;

[0046] 1 is the liquefied natural gas inlet, 2 is the air temperature vaporizer, 3 is the first valve, 4 is the second valve, 5 is the first compressed natural gas inlet, 6 is the radiant heater, 7 is the high-pressure hose, 8 is the sixth valve, 9 is the third valve, 10 is the fourth valve, 11 is the sewage outlet, 12 is the pneumatic shut-off valve, 13 is the high-pressure filter, 14 is the fifth valve, 15 is the relief valve, 16 is the first manifold, 17 is the pressure regulator, 18 is the filter, 19 is the overpressure shut-off valve, 20 is the gas turbine flowmeter, 21 is the outlet, 22 is the low-temperature long-axis shut-off valve, 23 is the second manifold, 24 is the first pillar, 25 is the second pillar, 26 is the first Three pillars, 27 is the fourth pillar, 28 is the outer frame, 29 is the first frame bar, 30 is the second frame bar, 31 is the third frame bar, 32 is the fourth frame bar, 33 is the fifth frame bar, 34 is the seventh valve, 35 is the auxiliary high-pressure hose, 36 is the eighth valve, 37 is the second compressed natural gas inlet, 38 is the first pipeline, 39 is the second pipeline, 40 is the third pipeline, 41 is the fourth pipeline, 42 is the fifth pipeline, 43 is the sixth pipeline, 43a is the sixth pipeline A, 43b is the sixth pipeline B, 44 is the seventh pipeline, 45 is the eighth pipeline, 45a is the eighth pipeline A, 45b is the eighth pipeline B, 46 is the ninth pipeline. DETAILED DESCRIPTION

[0047] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0048] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0049] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0050] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0051] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0052] Embodiment 1:

[0053] The following combination Figure 1 and Figure 2A specific embodiment of the pressure regulating and metering device based on liquefied natural gas and compressed natural gas described in the present invention is described, which includes: an air temperature vaporizer 2, a radiant heater 6, a first manifold 16, a pressure regulator 17, and a gas turbine flowmeter 20;

[0054] Also included are: a first pipeline 38, a second pipeline 39, a third pipeline 40, a fourth pipeline 41, a fifth pipeline 42, a sixth pipeline 43, a seventh pipeline 44 and a high-pressure hose 7;

[0055] The air temperature vaporizer 2 has an air inlet of the air temperature vaporizer 2 and an air outlet of the air temperature vaporizer 2, the air inlet of the air temperature vaporizer 2 is connected to the liquefied natural gas inlet 1, and the air outlet of the air temperature vaporizer 2 is connected to the first pipeline 38;

[0056] The end of the radiator 6 away from the ground is provided with a first air inlet, a second air inlet, a first air outlet, and a second air outlet. The first air inlet is connected to the first pipe 38, the second air inlet is connected to the high-pressure hose 7, the first air outlet is connected to the third pipe 40, and the second air outlet is connected to the fourth pipe 41;

[0057] One end of the high-pressure hose 7 is provided with a first compressed natural gas inlet 5, and the other end is connected to the second inlet. The high-pressure hose 7 is provided with a sixth valve 8 and a seventh valve 34 in sequence, and the seventh valve 34 is arranged near one end of the first compressed natural gas inlet 5;

[0058] One end of the first pipe 38 is connected to the air outlet of the air temperature vaporizer, and the other end is connected to the first air inlet. The first valve 3 and the second valve 4 are arranged on the first pipe 38 in sequence, and the first valve 3 and the second valve 4 are connected to the second pipe 39;

[0059] One end of the third pipeline 40 is connected to the first gas outlet, and the other end is connected to the first manifold 16. The third pipeline 40 is provided with a third valve 9;

[0060] One end of the second pipeline 39 is connected to the first pipeline 38 between the first valve 3 and the second valve 4, and the other end is connected to the third pipeline 40 between the third valve 9 and the first manifold 16. A fourth valve 10 is provided on the second pipeline 39; heating can be performed according to demand to save energy.

[0061] One end of the fourth pipeline 41 is connected to the second air outlet, and the other end is connected to the fifth pipeline 42. The fourth pipeline 41 is provided with a pneumatic shut-off valve 12 and a high-pressure filter 13 in sequence, and the high-pressure filter 13 is close to one end of the fifth pipeline 42.

[0062] One end of the first manifold 16 is connected to the third pipeline 40, and the other end is connected to the sixth pipeline 43. The third pipeline 40 and the sixth pipeline 43 are connected to the fifth pipeline 42. The first manifold is provided with a relief valve 15 to ensure safety.

[0063] One end of the fifth pipeline 42 is connected to the fourth pipeline 41, and the other end is connected to the first manifold 16 between the third pipeline 40 and the sixth pipeline 43. The fifth pipeline 42 is provided with a fifth valve 14;

[0064] One end of the sixth pipeline 43 is connected to the first manifold 16, and the other end is connected to the seventh pipeline 44. A pressure regulator 17 is provided on the sixth pipeline 43 to make the output natural gas fuel pressure more stable;

[0065] One end of the seventh pipeline 44 is connected to the sixth pipeline 43, and the other end is provided with an outlet 21. The seventh pipeline 44 is provided with a filter 18, an overpressure cut-off valve 19, and a gas turbine flowmeter 20 in sequence. The gas turbine flowmeter 20 is arranged near one end of the outlet 21 to ensure safety and make the output natural gas fuel flow and flow rate more stable.

[0066] Choose to use liquefied natural gas or compressed natural gas according to your needs.

[0067] When using liquefied natural gas, close the fifth valve 14 and the sixth valve 8, and the liquefied natural gas enters the air temperature vaporizer 2 from the liquefied natural gas inlet 1. The air temperature vaporizer 2 uses an aluminum heat exchange tube as the prior art, with an internal solar fin structure and a "bridge" connection to convert solar energy into heat energy for liquefied natural gas vaporization, which is converted into gaseous natural gas and enters the first pipeline 38 from the outlet of the air temperature vaporizer 2; since the vaporization process will take away a lot of heat, the temperature becomes low, and the humidity is high, frost may also occur. When the temperature is too low, open the second valve 4 and the third valve. The gaseous natural gas enters the first manifold 16 after being heated by the radiant heat device 6; if the temperature is normal, the second valve 4 and the third valve 9 are closed, the fourth valve 10 is opened, and the gaseous natural gas enters the first manifold 16; the gaseous natural gas after entering the first manifold 16 can be ensured safe by the relief valve 15, the gaseous natural gas after entering the first manifold 16 is filtered by the filter 18 after the pressure is adjusted by the pressure regulator 17, and the gas turbine flowmeter 20 detects the flow rate before being discharged from the gas outlet 21, and can be ensured safe by the overpressure cut-off valve 19 in the seventh pipeline 44.

[0068] When compressed natural gas is used, the second valve 4 and the third valve 9 are closed, and the fifth valve 14, the sixth valve 8 and the seventh valve 34 are opened. The compressed natural gas enters the radiant heater 6 from the first compressed natural gas inlet 5 for heating and then enters the fourth pipeline 41. It passes through the high-pressure filter 13 in the fourth pipeline 41 and then enters the fifth pipeline 42. It can be cut off by the pneumatic cut-off valve 12 in the fourth pipeline 41, and enters the first manifold 16 from the fifth pipeline 42 and then enters the sixth pipeline 43. The safety can be ensured by the relief valve 15 in the first manifold 16. After the pressure is adjusted by the pressure regulator 17 in the sixth pipeline 43, it is filtered by the filter 18 in turn, and the flow is detected by the gas turbine flowmeter 20 before being discharged from the gas outlet 21. The safety can be ensured by the overpressure cut-off valve 19 in the seventh pipeline 44.

[0069] The following combination Figure 3 and Figure 4 Another embodiment of the present invention is described.

[0070] Example 2

[0071] This is another embodiment of the present invention, which includes: an air temperature vaporizer 2, a radiant heater 6, a first manifold 16, a pressure regulator 17, and a gas turbine flowmeter 20;

[0072] Also included are: a first pipeline 38, a second pipeline 39, a third pipeline 40, a fourth pipeline 41, a fifth pipeline 42, a sixth pipeline 43, a seventh pipeline 44 and a high-pressure hose 7;

[0073] The air temperature vaporizer 2 has an air inlet of the air temperature vaporizer 2 and an air outlet of the air temperature vaporizer 2, the air inlet of the air temperature vaporizer 2 is connected to the liquefied natural gas inlet 1, and the air outlet of the air temperature vaporizer 2 is connected to the first pipeline 38;

[0074] The eighth pipeline 45 and the ninth pipeline 46 are also included. One end of the eighth pipeline 45 is connected to the liquefied natural gas inlet 1, and the other end is connected to the ninth pipeline 46. The eighth pipeline 45 is provided with a low-temperature long-axis stop valve 22, and the number of the low-temperature long-axis stop valves 22 is 10.

[0075] One end of the ninth pipeline 46 is connected to the eighth pipeline 45, and the other end is connected to the air inlet of the air temperature vaporizer 2;

[0076] There are two eighth pipelines 45, including: an eighth pipeline A 45a and an eighth pipeline B 45b. The eighth pipeline A 45a and the eighth pipeline B 45b are arranged in parallel. One end of the eighth pipeline A 45a and the eighth pipeline B 45b are connected to the liquefied natural gas inlet 1, and the other end is connected to the ninth pipeline 46. The eighth pipeline A 45a and the eighth pipeline B 45b completely overlap in the direction perpendicular to the ground, and each Dewar flask connected to the low-temperature long-axis stop valve 22 can be accurately controlled.

[0077] The end of the radiator 6 away from the ground is provided with a first air inlet, a second air inlet, a first air outlet, and a second air outlet. The first air inlet is connected to the first pipe 38, the second air inlet is connected to the high-pressure hose 7, the first air outlet is connected to the third pipe 40, and the second air outlet is connected to the fourth pipe 41;

[0078] A temperature gauge (not shown), a temperature transmitter (not shown), a float (not shown), a drain valve (not shown) and a water injection valve (not shown) are provided at the end of the radiator 6 away from the ground. A sewage outlet 11 is provided at the side wall of the radiator 6 close to the ground to facilitate observation and keep the radiator 6 in good working condition.

[0079] One end of the high-pressure hose 7 is provided with a first compressed natural gas inlet 5, and the other end is connected to the second inlet. The high-pressure hose 7 is provided with a sixth valve 8 and a seventh valve 34 in sequence, and the seventh valve 34 is arranged near one end of the first compressed natural gas inlet 5;

[0080] It also includes an auxiliary high-pressure hose 35, one end of which is connected to the high-pressure hose 7 between the sixth valve 8 and the seventh valve 34, and the other end is provided with a second compressed natural gas inlet 37. The auxiliary high-pressure hose 35 is provided with an eighth valve 36 to improve work efficiency.

[0081] One end of the first pipeline 38 is connected to the air outlet of the air temperature vaporizer 2, and the other end is connected to the first air inlet. The first valve 3 and the second valve 4 are arranged on the first pipeline 38 in sequence, and the first valve 3 and the second valve 4 are connected to the second pipeline 39;

[0082] One end of the third pipeline 40 is connected to the first gas outlet, and the other end is connected to the first manifold 16. The third pipeline 40 is provided with a third valve 9;

[0083] One end of the second pipeline 39 is connected to the first pipeline 38 between the first valve 3 and the second valve 4, and the other end is connected to the third pipeline 40 between the third valve 9 and the first manifold 16. The second pipeline 39 is provided with a fourth valve 10, which can be heated according to demand to save energy;

[0084] One end of the fourth pipeline 41 is connected to the second gas outlet, and the other end is connected to the second manifold 23. The fourth pipeline 41 is provided with a pneumatic shut-off valve 12 and a high-pressure filter 13 in sequence. The high-pressure filter 13 is close to one end of the second manifold 23, which is safer and has a more stable pressure.

[0085] One end of the first manifold 16 is connected to the third pipeline 40, and the other end is connected to the sixth pipeline 43. The third pipeline 40 and the sixth pipeline 43 are connected to the fifth pipeline 42. The first manifold 16 is provided with a relief valve 15 to ensure safety.

[0086] It also includes a second manifold 23, a fourth pipe 41 connected to the second manifold 23 in a direction parallel to the ground, and a fifth pipe 42 connected to the second manifold 23 in a direction perpendicular to the ground, so as to provide a smooth buffer and regulate the pressure;

[0087] One end of the fifth pipeline 42 is connected to the second manifold 23, and the other end is connected to the first manifold 16 between the third pipeline 40 and the sixth pipeline 43. The fifth pipeline 42 is provided with a fifth valve 14;

[0088] There are four fifth pipelines 42, including: a fifth pipeline 42A, a fifth pipeline 42B, a fifth pipeline 42C and a fifth pipeline 42D. The fifth pipeline 42A, the fifth pipeline 42B, the fifth pipeline 42C and the fifth pipeline 42D are arranged in parallel. The fifth pipeline 42A, the fifth pipeline 42B, the fifth pipeline 42C and the fifth pipeline 42D are all connected to the first manifold 16 at one end and connected to the second manifold 23 at the other end.

[0089] One end of the sixth pipeline 43 is connected to the first manifold 16, and the other end is connected to the seventh pipeline 44. The sixth pipeline 43 is provided with a pressure regulator 17;

[0090] There are two sixth pipelines 43, including: a sixth pipeline A 43a and a sixth pipeline B 43b. The sixth pipeline A 43a and the sixth pipeline B 43b are arranged in parallel. One end of the sixth pipeline A 43a and the sixth pipeline B 43b are connected to the first manifold 16, and the other end is connected to the seventh pipeline 44. One is opened and the other is standby to ensure the effectiveness of the work.

[0091] One end of the seventh pipeline 44 is connected to the sixth pipeline 43, and the other end is provided with an air outlet 21. The seventh pipeline 44 is provided with a filter 18, an overpressure cut-off valve 19, and a gas turbine flowmeter 20 in sequence. The gas turbine flowmeter 20 is arranged near one end of the air outlet 21. The filter 18 is a Y-type filter, which effectively removes impurities and keeps it clean.

[0092] It also includes: a bracket, which includes a bottom frame and a support column for easy movement;

[0093] The pillars include: a first pillar 24, a second pillar 25, a third pillar 26 and a fourth pillar 27;

[0094] The bottom frame includes: an outer frame 28 and an inner frame strip;

[0095] The inner frame strips include: a first frame strip 29, a second frame strip 30, a third frame strip 31, a fourth frame strip 32 and a fifth frame strip 33;

[0096] The first frame bar 29 is provided with a first support column 24 and a second support column 25, and the second frame bar 30 is provided with a third support column 26 and a fourth support column 27, and the first support column 24, the second support column 25, the third support column 26 and the fourth support column 27 support the air temperature vaporizer 2;

[0097] The third frame bar 31 and the fourth frame bar 32 support the radiator 6 .

[0098] Choose to use liquefied natural gas or compressed natural gas according to your needs.

[0099] When using liquefied natural gas, close the fifth valve 14 and the sixth valve 8, and the liquefied natural gas enters the air-temperature vaporizer 2 from the liquefied natural gas inlet 1. The air-temperature vaporizer 2, as a prior art, adopts an aluminum heat exchange tube, an internal solar fin structure, and a "bridge" type connection to convert solar energy into thermal energy for liquefied natural gas vaporization. In special cases, a Dewar flask can be used to connect the liquefied natural gas inlet 1 and the low-temperature long-axis stop valve 22 to provide liquefied natural gas, the low-temperature long-axis stop valve 22 on the eighth pipeline 45A controls the flash steam in the Dewar flask, and the low-temperature long-axis stop valve 22 on the eighth pipeline 45B controls the liquefied natural gas in the Dewar flask. The converted gaseous natural gas enters the first pipeline 38 from the outlet of the air temperature vaporizer 2; since the vaporization process will take away a lot of heat, the temperature becomes low, and the humidity is high, frost may also occur. When the temperature is too low, the second valve 4 and the third valve 9 are opened, and the fourth valve 10 is closed. The natural gas enters the first manifold 16 after being heated by the radiator 6; if the temperature is normal, the second valve 4 and the third valve 9 are closed, and the fourth valve 10 is opened, and the gaseous natural gas enters the first manifold 16, and the impurities in the radiator 6 can be discharged through the sewage outlet 11; the gaseous natural gas after entering the first manifold 16 can be ensured to be safe by the relief valve 15, and the gaseous natural gas after entering the first manifold 16 is filtered by the filter 18 after the pressure is adjusted by the pressure regulator 17, and the gas turbine flowmeter 20 detects the flow rate and then is discharged from the gas outlet 21, and in the seventh pipeline 44, the overpressure cut-off valve 19 can be used to ensure safety.

[0100] When compressed natural gas is used, the second valve 4 and the third valve 9 are closed, and the fifth valve 14, the sixth valve 8, the seventh valve 34 and the eighth valve 36 are opened. The compressed natural gas enters the radiant heater 6 from the first compressed natural gas inlet 5 and the second compressed natural gas inlet 37 in turn for heating and then enters the fourth pipeline 41. After passing through the high-pressure filter 13 in the fourth pipeline 41, it enters the second manifold 23. In the fourth pipeline 41, it can be cut off by the pneumatic cut-off valve 12, and then enters the first manifold 16 from the second manifold 23 through the fifth pipeline 42 and then enters the sixth pipeline A 43a. In the first manifold 16, the safety can be ensured by the relief valve 15. After the pressure is adjusted by the pressure regulator 17 in the sixth pipeline A 43a, it is filtered by the filter 18 in turn, and the flow is detected by the gas turbine flowmeter 20 before being discharged from the gas outlet 21. The sixth pipeline B 43b is used as a spare pressure regulating pipeline. In the seventh pipeline 44, the safety can be ensured by the overpressure cut-off valve 19.

[0101] It can be seen from the above embodiments that the present invention achieves at least the following beneficial effects:

[0102] 1. The structure of the present invention is reasonably designed, and can be used for both vaporization auxiliary heat pressure regulation metering of liquefied natural gas and pressure regulation metering of compressed natural gas. The vaporization auxiliary heat pressure regulation metering of liquefied natural gas or pressure regulation metering of compressed natural gas can be used according to different needs.

[0103] 2. The pressure regulating and metering device in the present invention can stabilize the pressure and flow of the output natural gas fuel.

[0104] 3. The present invention has a simple structure and is easy to repair and maintain.

[0105] 4. The present invention is provided with a relief valve and multiple valves, which is more secure.

[0106] 5. The present invention is provided with a filter, which can effectively filter out impurities and make it cleaner.

[0107] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A pressure regulating and metering device based on liquefied natural gas and compressed natural gas, characterized in that: include: Air temperature vaporizer, radiant heater, first manifold, pressure regulator, gas turbine flowmeter; Also includes: a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline, a sixth pipeline, a seventh pipeline and a high-pressure hose; The air temperature vaporizer has an air temperature vaporizer air inlet and an air temperature vaporizer air outlet, the air temperature vaporizer air inlet is connected to the liquefied natural gas air inlet, and the air temperature vaporizer air outlet is connected to the first pipeline; The radiator is provided with a first air inlet, a second air inlet, a first air outlet, and a second air outlet at one end away from the ground, wherein the first air inlet is connected to the first pipe, the second air inlet is connected to the high-pressure hose, the first air outlet is connected to the third pipe, and the second air outlet is connected to the fourth pipe; One end of the high-pressure hose is provided with a first compressed natural gas inlet, and the other end is connected to the second inlet. The high-pressure hose is provided with a sixth valve and a seventh valve in sequence, and the seventh valve is arranged near one end of the first compressed natural gas inlet; One end of the first pipeline is connected to the air outlet of the air temperature vaporizer, and the other end is connected to the first air inlet. A first valve and a second valve are sequentially arranged on the first pipeline, and the first valve and the second valve are connected to the second pipeline; One end of the third pipeline is connected to the first gas outlet, and the other end is connected to the first manifold, and a third valve is provided on the third pipeline; One end of the second pipeline is connected to the first pipeline between the first valve and the second valve, and the other end is connected to the third pipeline between the third valve and the first manifold, and a fourth valve is provided on the second pipeline; One end of the fourth pipeline is connected to the second air outlet, and the other end is connected to the fifth pipeline. The fourth pipeline is provided with a pneumatic shut-off valve and a high-pressure filter in sequence, and the high-pressure filter is close to one end of the fifth pipeline; One end of the first manifold is connected to the third pipeline, and the other end is connected to the sixth pipeline, and the fifth pipeline is connected between the third pipeline and the sixth pipeline, and a relief valve is provided on the first manifold; One end of the fifth pipeline is connected to the fourth pipeline, and the other end is connected to the first manifold between the third pipeline and the sixth pipeline, and a fifth valve is provided on the fifth pipeline; One end of the sixth pipeline is connected to the first manifold, and the other end is connected to the seventh pipeline, and the pressure regulator is provided on the sixth pipeline; One end of the seventh pipeline is connected to the sixth pipeline, and the other end is provided with an air outlet. The seventh pipeline is provided with a filter, an overpressure cut-off valve, and the gas turbine flowmeter in sequence, and the gas turbine flowmeter is arranged near one end of the air outlet; Also includes a second manifold, The fourth pipeline is connected to the second manifold in a direction parallel to the ground, and the fifth pipeline is connected to the second manifold in a direction perpendicular to the ground; The number of the fifth pipelines is four, including: a fifth pipeline A, a fifth pipeline B, a fifth pipeline C and a fifth pipeline D, the fifth pipeline A, the fifth pipeline B, the fifth pipeline C and the fifth pipeline D are arranged in parallel, and one end of the fifth pipeline A, the fifth pipeline B, the fifth pipeline C and the fifth pipeline D are connected to the first manifold, and the other end is connected to the second manifold; The number of the sixth pipelines is two, including: a sixth pipeline A and a sixth pipeline B, the sixth pipeline A and the sixth pipeline B are arranged in parallel, and the sixth pipeline A and the sixth pipeline B are both connected to the first manifold at one end and connected to the seventh pipeline at the other end; It also includes: an eighth pipeline and a ninth pipeline, one end of the eighth pipeline is connected to the liquefied natural gas inlet, and the other end is connected to the ninth pipeline, and the eighth pipeline is provided with a low-temperature long-axis stop valve, and the number of the low-temperature long-axis stop valves is 10; One end of the ninth pipeline is connected to the eighth pipeline, and the other end is connected to the air inlet of the air temperature vaporizer; There are two eighth pipelines, including an eighth pipeline A and an eighth pipeline B. The eighth pipeline A and the eighth pipeline B are arranged in parallel. One end of the eighth pipeline A and the eighth pipeline B are connected to the liquefied natural gas inlet, and the other end is connected to the ninth pipeline. The eighth pipeline A and the eighth pipeline B completely overlap in a direction perpendicular to the ground. Also included: a bracket, the bracket including a bottom frame and a support column; The pillars include: a first pillar, a second pillar, a third pillar and a fourth pillar; The bottom frame includes: an outer frame and an inner frame strip; The inner frame strips include: a first frame strip, a second frame strip, a third frame strip, a fourth frame strip and a fifth frame strip; The first frame bar is provided with the first support column and the second support column, the second frame bar is provided with the third support column and the fourth support column, and the first support column, the second support column, the third support column and the fourth support column support the air temperature vaporizer; The third frame bar and the fourth frame bar support the radiator.

2. The pressure regulating and metering device based on liquefied natural gas and compressed natural gas according to claim 1, characterized in that: The end of the radiator away from the ground is provided with a temperature gauge, a temperature transmitter, a float, a vent valve and a water injection valve, and the side wall of the radiator close to the ground is provided with a sewage outlet.

3. The pressure regulating and metering device based on liquefied natural gas and compressed natural gas according to claim 1, characterized in that: The filter is a Y-type filter.

4. The pressure regulating and metering device based on liquefied natural gas and compressed natural gas according to claim 1, characterized in that: It also includes an auxiliary high-pressure hose, one end of which is connected to the high-pressure hose between the sixth valve and the seventh valve, and the other end is provided with a second compressed natural gas inlet, and the auxiliary high-pressure hose is provided with an eighth valve.

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