High-flow and high-efficiency LNG (Liquefied Natural Gas) dispenser

Abstract

The utility model discloses a high-flow high-efficiency LNG (Liquefied Natural Gas) dispenser which comprises a dispenser body, a valve bank, a pipeline and a measurement and control system, the valve bank is arranged and connected in the dispenser body, the valve bank comprises a filter valve, and the filter valve comprises an upper cover, a valve body, a buffer cavity, a filter element, a liquid inlet, a liquid outlet and a fixing bolt. The flow direction of a medium in a pipeline can be changed through the designed filter valve, an elbow in an original pipeline system is replaced, meanwhile, through the internal steering structure design of the buffer cavity and the connection mode of the filter element, local resistance loss of the medium in the pipeline is reduced, the effective filter area is increased, and the purposes of increasing the medium flow and stabilizing the medium pressure are achieved. The external cavity and the internal valve core structure of the pull-apart valve at the joint of the hose of the gas dispenser are subjected to multi-part angle expansion, so that no throat neck position exists in an internal flow channel of the pull-apart valve under the condition that the external size of the pull-apart valve is not changed, and therefore, no cut-off point exists in a medium circulation channel of the whole equipment, and the effects of large flow and high lift of the LNG dispenser are achieved.

Description

Technical Field

[0001] This utility model relates to a device, specifically a high-flow-rate, high-efficiency LNG dispenser. Background Technology

[0002] LNG (Liquefied Natural Gas) is the abbreviation for liquefied natural gas. Natural gas is a combustible gas naturally extracted from gas fields, primarily composed of methane. LNG is produced by cooling gaseous natural gas at atmospheric pressure to -162°C, causing it to condense into a liquid. Liquefaction of natural gas significantly saves storage and transportation space and offers advantages such as high calorific value and superior performance. LNG dispensers are independent units with their own monitoring and control systems, requiring no additional external control and featuring ease of operation and a high degree of automation.

[0003] The flow rate in existing LNG refueling pipelines is fixed. However, due to unreasonable pipeline structure, valve structure, overall layout, and control system, the flow rate and pressure of the medium are usually limited, which is the main factor affecting the final flow rate. Utility Model Content

[0004] The purpose of this invention is to provide a high-flow-rate, high-efficiency LNG dispenser to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-flow, high-efficiency LNG dispenser includes a valve assembly installed in the main body. The valve assembly is mounted on the main body. The filter valve includes a top cover, valve body, buffer chamber, filter element, inlet, outlet, and fixing bolts. The valve body is located on one side of the top cover and is fixedly connected by the fixing bolts. The filter element is installed in the valve body. The filter element and valve body have a buffer chamber. The inlet and outlet are integrally formed on the valve body, forming an angled structure.

[0007] As a further embodiment of this utility model: the body is provided with a side plate, a top plate, a computer box, an air gun, a middle sealing plate, an insulation box, and pipelines. The top plate is provided on the upper side of the side plate and is fixedly connected to the side plate. The computer box is provided on one side of the top plate and is fixedly connected to the side plate. The middle sealing plate is provided on one side of the computer box and is fixedly connected to the side plate. The air gun is provided on one side of the side plate and is connected to the side plate.

[0008] As a further embodiment of this utility model: the valve assembly includes a low-temperature jacketed shut-off valve, a low-temperature jacketed check valve, a check valve, an instrument valve, a hose, a flow meter, a low-temperature jacketed shut-off check valve, and a filter valve. A low-temperature jacketed shut-off valve is provided on the upper side of the insulation box. One end of the low-temperature jacketed shut-off valve is fixedly connected to the insulation box, and the other end of the low-temperature jacketed shut-off valve is fixedly connected to the pipeline. A low-temperature jacketed check valve is provided on the pipeline connected to the low-temperature jacketed shut-off valve. The low-temperature jacketed check valve is fixedly connected to the insulation box. The pipeline system is also provided with a check valve and an instrument valve.

[0009] As a further embodiment of this utility model: an insulation box is provided in the side panel, the insulation box is fixedly connected in the side panel, and a pipeline is provided in the insulation box, the pipeline being connected to the insulation box and the side panel.

[0010] As a further embodiment of this utility model: a flexible hose is provided on one side of the insulated box, a flow meter is provided on one side of the flexible hose, the flow meter is fixedly connected to the pipeline, and a filter valve is provided on one side of the flow meter, the filter valve is fixedly connected to the pipeline.

[0011] As a further improvement of this utility model: the cross-sectional area inside the pull-off valve cavity is larger than the cross-sectional area of ​​the gas dispenser pipeline, and a ball valve structure is selected at the equipment inlet.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The inlet and outlet of the filter valve are integrally formed on the valve body, with an angled structure. The designed filter valve can change the flow direction of the medium in the pipeline, replacing the elbows in the original pipeline system. At the same time, through the internal turning structure design of the buffer chamber and the connection method of the filter element, the local resistance loss of the medium in the pipeline can be reduced, and the effective filtration area can be increased, thereby increasing the medium flow rate and stabilizing the medium pressure.

[0014] In addition, the breakaway valve installed at the hose connection of the LNG dispenser has also been improved. Its external cavity and internal valve core structure have been expanded in multiple parts after calculation and fluid simulation. Without changing the external dimensions of the breakaway valve, there is no throat position in the internal flow channel of the breakaway valve, so that there is no obstruction point in the medium flow channel of the entire equipment, thereby achieving the effect of large flow rate and high head of the LNG dispenser.

[0015] In this solution, the filter valve can be a bottom-entry angle filter valve, a slide-in angle filter valve, or a side-entry angle filter valve. Based on the characteristics of this machine, the bottom-entry angle filter valve was selected. Its main advantages are that while meeting the requirements of high flow rate and high head of this model, it is easy to clean and replace the filter element inside the filter valve, and it is also easy to remove impurities from the pipeline system when purging the pipeline. Attached Figure Description

[0016] Figure 1This is a schematic diagram of a high-flow-rate, high-efficiency LNG refueling machine.

[0017] Figure 2 This is a front view schematic diagram of a high-flow-rate, high-efficiency LNG dispenser.

[0018] Figure 3 This is a schematic diagram of the filter valve in a high-flow, high-efficiency LNG dispenser.

[0019] Figure 4 This is a schematic diagram of the internal structure of the break-off valve in a high-flow, high-efficiency LNG refueling machine. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-4 In this embodiment of the utility model, a high-flow-rate, high-efficiency LNG dispenser includes a body 100 and a valve group 200.

[0022] The body 100 is equipped with a valve assembly 200, which is installed and connected to the body 100.

[0023] The machine body 100 includes a side panel 101, a top panel 102, a computer box 103, an air gun 104, a center sealing plate 105, an insulation box 106, and piping 107. The top panel 102 is located on the upper side of the side panel 101 and is fixedly connected to the side panel 101. The computer box 103 is located on one side of the top panel 102 and is fixedly connected to the side panel 101. The center sealing plate 105 is located on one side of the computer box 103. The central sealing plate 105 is fixedly connected to the side plate 101. A gas gun 104 is provided on one side of the side plate 101 and is connected to the side plate 101. An insulation box 106 is provided in the side plate 101 and is fixedly connected to the side plate 101. A pipeline 107 is provided in the insulation box 106 and is connected to the insulation box 106 and the side plate 101. The gas dispenser's monitoring and control system is installed in the computer box 103.

[0024] Valve assembly 200 includes a cryogenic jacketed shut-off valve 201, a cryogenic jacketed check valve 202, a check valve 203, an instrument valve 204, a hose 205, a flow meter 206, a cryogenic jacketed shut-off check valve 207, and a filter valve 208. A cryogenic jacketed shut-off valve 201 is located on the upper side of the insulation box 106. One end of the cryogenic jacketed shut-off valve 201 is fixedly connected to the insulation box 106, and the other end is fixedly connected to the pipeline 10. 7. A low-temperature jacketed check valve 202 is provided on one side of the low-temperature jacketed shut-off valve 201. The low-temperature jacketed check valve 202 is fixedly connected to the insulation box 106. The low-temperature jacketed check valve 202 is connected to the pipeline 107. The low-temperature jacketed check valve 202 is provided on the pipeline connected to the low-temperature jacketed shut-off valve 201. The low-temperature jacketed check valve 202 is fixedly connected to the insulation box 106. The pipeline system is also provided with a check valve 203 and an instrument valve 204.

[0025] The filter valve 208 includes a top cover 281, a valve body 282, a buffer chamber 283, a filter element 284, an inlet 285, an outlet 286, and fixing bolts 287. The valve body 282 is located on one side of the top cover 281 and is fixedly connected by the fixing bolts 287. The filter element 284 is located in the valve body 282 and is installed in the valve body 282. The filter element 284 and the valve body 282 are provided with a buffer chamber 283. The inlet 285 and the outlet 286 are located on one side of the valve body 282 and are integrally formed on the valve body 282.

[0026] The working principle of this utility model is as follows:

[0027] During operation, the LNG flow direction within the refueling unit is determined based on the working status: when the process requires internal pre-cooling circulation, LNG flows back to the LNG storage tank through a control valve, and the refueling unit does not meter; when the refueling unit directly refuels without pre-cooling, LNG is supplied to the storage container through the control valve, refueling hose, and refueling nozzle. Before refueling, if necessary, the refueling unit's return nozzle can be inserted into the return port of the storage container. Residual gas in the storage container flows back to the LNG storage tank through a gas phase flow meter, reducing the internal pressure of the storage container and ensuring smooth LNG refueling. During refueling, the refueling unit can be connected only to the refueling line for direct refueling, or it can be connected to both the refueling line and the return line simultaneously. The electronic controller of the gas dispenser automatically controls the gas dispensing process and performs calculations based on the flow signal output by the flow meter. The mass of LNG dispensed into the gas storage container is the difference between the measured value of the liquid phase flow meter and the measured value of the gas phase flow meter (when the gas dispenser is not connected to the return gas line, the count value of the gas phase flow meter is zero). The final measured value is displayed on the gas dispenser panel.

[0028] By designing an angled filter valve, the flow direction of the medium in the pipeline can be changed, replacing the elbows in the original pipeline system. At the same time, through the internal deflection structure design of the buffer chamber and the connection method of the filter element, the local resistance loss of the medium in the pipeline can be reduced, and the effective filtration area can be increased, thereby increasing the medium flow rate and stabilizing the medium pressure.

[0029] To reduce flow resistance and pressure drop, the following aspects are addressed: 1. Filter valve structural design: The filter valve adopts an independent design structure with angled inlets and outlets, replacing the original elbows and reducing pressure loss at the elbows. This achieves the high flow rate and high efficiency of the equipment. Compared to the plate-type and side-type filter valves, the bottom-entry angle type has a larger effective filtration area and reduced flow resistance. The increased effective filtration area does not affect the filtration effect, but it does reduce pressure loss in the pipeline. 2. Breakaway valve structural design, verified by a hydraulic model; the cross-sectional area of ​​any point inside the cavity is larger than the cross-sectional area of ​​the gas dispenser pipeline. 3. Valve assembly and internal pipeline process optimization, using custom-designed and processed parts instead of standard fittings to reduce flow resistance. 4. Ball valve design at the equipment inlet achieves full-bore, non-blocking flow. 5. Control system optimization: By setting the linkage time between the gas dispenser's front-end pump start / stop and the control valves inside the gas dispenser, and through pipeline process optimization, water hammer effect and ineffective pump power output are avoided.

[0030] The entire gas dispenser piping is integrated into a single valve box. This design allows for a more compact equipment structure and easier valve operation. The valves within the valve box are vacuum-jacketed, eliminating the need to cut open the insulation box or piping for maintenance or replacement, enabling online repair and replacement. The valve box can employ either PIR or vacuum insulation. The integrated piping insulation provides excellent insulation, reduces cold loss from the piping, and improves dispensing efficiency and quality.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-flow-rate, high-efficiency LNG dispenser, comprising a body (100) and a valve assembly (200), characterized in that, The machine body (100) is equipped with a valve assembly (200), which is installed and connected to the machine body (100). The filter valve (208) includes a top cover (281), a valve body (282), a buffer chamber (283), a filter element (284), an inlet (285), an outlet (286), and a fixing bolt (287). The valve body (282) is located on one side of the top cover (281), and the valve body (282) is fixedly connected by the fixing bolt (287). Next, a filter element (284) is provided in the valve body (282). The filter element (284) is installed and connected in the valve body (282). A buffer chamber (283) is provided in the filter element (284) and the valve body (282). An inlet (285) and an outlet (286) are provided on one side of the valve body (282). The inlet (285) and the outlet (286) are angled and integrally formed on the valve body (282).

2. The high-flow-rate, high-efficiency LNG dispenser according to claim 1, characterized in that, The machine body (100) is provided with a side plate (101), a top plate (102), a computer box (103), a gas gun (104), a middle sealing plate (105), an insulation box (106), and a pipeline (107). The top plate (102) is located on the upper side of the side plate (101) and is fixedly connected to the side plate (101). The computer box (103) is located on one side of the top plate (102) and is fixedly connected to the side plate (101). The middle sealing plate (105) is located on one side of the computer box (103) and is fixedly connected to the side plate (101). The gas gun (104) is located on one side of the side plate (101) and is connected to the pipeline (107). The gas dispenser's monitoring and control system is installed in the computer box (103).

3. The high-flow-rate, high-efficiency LNG dispenser according to claim 1, characterized in that, The valve assembly (200) includes a low-temperature jacketed shut-off valve (201), a low-temperature jacketed check valve (202), a check valve (203), an instrument valve (204), a hose (205), a flow meter (206), a low-temperature jacketed shut-off check valve (207), and a filter valve (208). The low-temperature jacketed shut-off valve (201) is provided on the upper side of the insulation box (106). One end of the low-temperature jacketed shut-off valve (201) is fixedly connected to the insulation box (106), and the other end of the low-temperature jacketed shut-off valve (201) is fixedly connected to the pipeline (107). The low-temperature jacketed check valve (202) is provided on the pipeline connected to the low-temperature jacketed shut-off valve (201). The low-temperature jacketed check valve (202) is fixedly connected to the insulation box (106). The pipeline system is also provided with a check valve (203) and an instrument valve (204).

4. The high-flow-rate, high-efficiency LNG dispenser according to claim 1, characterized in that, The body (100) is equipped with an insulation box (106), and the insulation box (106) is equipped with a pipe (107), which is connected to the insulation box (106) and the side plate (101).

5. A high-flow-rate, high-efficiency LNG dispenser according to claim 1, characterized in that, A flexible hose (205) is provided on one side of the insulated box (106), and a flow meter (206) is provided on one side of the flexible hose (205). The flow meter (206) is fixedly connected to the pipeline (107). A filter valve (208) is provided at the inlet of the flow meter (206), and the filter valve (208) is fixedly connected to the pipeline (107).

6. A high-flow-rate, high-efficiency LNG dispenser according to claim 1, characterized in that, The cross-sectional area inside the breakaway valve cavity is larger than the cross-sectional area of ​​the gas dispenser pipeline, and a ball valve structure is selected at the equipment inlet.

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