Integrated LPG (Liquefied Petroleum Gas) supply system

Abstract

The utility model relates to an LPG (Liquefied Petroleum Gas) supply system, in particular to an integrated LPG supply system which comprises a vaporizer connected with a gas storage tank through a pipeline assembly I, the inlet end of the vaporizer is connected with a fuel stop valve, and the vaporizer and the fuel stop valve are both arranged on a fixed frame; a gas cavity and a heating cavity are arranged in the vaporizer, the inlet end and the outlet end of the gas cavity are respectively provided with a filter screen, and the gas cavity positioned at the front end of the filter screen is respectively provided with a coal tar discharge port; a gas outlet of the vaporizer is connected with the engine through a second pipeline assembly. The heating cavity is connected with a heating pipe used for providing heat, and the heating pipe is connected with a cooling water channel of an engine. The fuel pipe, the fuel cut-off valve and the vaporizer are fixed together through the fixing frame to form an assembly, the assembly can be conveniently installed on a whole machine, and the influence of an engine is reduced. A filter screen and a coal tar discharge port are arranged in the vaporizer, so that impurities and coal tar in the LPG can be effectively filtered and discharged, and the gas quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of forklift air supply technology, specifically to an integrated LPG air supply system. Background Technology

[0002] Liquefied petroleum gas (LPG), as a clean energy source, is widely used in the power systems of various vehicles and industrial equipment. Some internal combustion forklifts use LPG as fuel to power their operations. An LPG fuel system typically consists of an LPG storage tank, filter, carburetor, solenoid valve, and heating water pipes. When the LPG solenoid valve opens, liquid LPG flows from the storage tank into the filter for filtration, then enters the evaporator (carburetor) where it is depressurized and vaporized. The vaporized LPG then has its flow rate regulated by the solenoid valve and power control valve before being mixed with air and burned in the engine's combustion chamber to power the forklift.

[0003] Currently, LPG fuel system piping includes connections to the gas storage tank, carburetor, and heating water, resulting in a variety of components and complex connections. Furthermore, the carburetor and filter are typically mounted on the engine. Due to the significant vibrations during engine operation, prolonged use can easily lead to loose connections or component damage, affecting the system's stability and safety. It can also cause damage to the filter screen, allowing impurities such as coal tar to enter the engine and cause damage. Therefore, separately arranging all LPG fuel system components on the forklift body presents challenges such as installation difficulties, complex piping connections, and long routes. Utility Model Content

[0004] To address the aforementioned problems, this invention provides an integrated LPG supply system.

[0005] The specific technical solution is as follows:

[0006] An integrated LPG supply system includes a vaporizer connected to a gas storage tank via a piping assembly. A fuel shut-off valve is connected to the inlet end of the vaporizer, and both the vaporizer and the fuel shut-off valve are mounted on a fixed frame. The vaporizer contains a gas chamber and a heating chamber. Filters are installed at the inlet and outlet ends of the gas chamber, and coal tar discharge ports are opened at the front end of the filter screens. The gas outlet of the vaporizer is connected to an engine via a piping assembly. The heating chamber is connected to a heating pipe for providing heat, and the heating pipe is connected to the engine's cooling water circuit.

[0007] In a further embodiment, the piping assembly includes a gas tank connecting pipe connected to a gas storage tank, the gas tank connecting pipe being connected to a fuel pipe via a tee fitting with a pressure relief valve, the fuel pipe being connected to a shut-off valve connecting pipe via a transition fitting; the shut-off valve connecting pipe being connected to the inlet of a fuel shut-off valve, and the fuel shut-off valve being connected to the carburetor via a connecting fitting.

[0008] In a further embodiment, the vaporizer includes a vaporizer body, on which an air inlet and an air outlet communicating with the air chamber are provided to form an air passage; the vaporizer body also has a water inlet and a water outlet communicating with the heating chamber to form a heating water passage, and the water inlet and water outlet are respectively connected to a heating pipe.

[0009] In a further embodiment, the heating pipe includes an inlet pipe and a return pipe. The inlet of the inlet pipe is connected to the cooling outlet of the engine, and the outlet is connected to the inlet of the carburetor. The inlet of the return pipe is connected to the outlet of the carburetor 3, and the outlet is connected to the cooling inlet of the engine.

[0010] Preferably, the connection ends of the water inlet pipe and the water return pipe are both secured with pipe fixing clamps; the water inlet pipe and the water return pipe are respectively fixed to the vehicle body by the first fixing bracket and the second fixing bracket to avoid contact with the engine.

[0011] In a further embodiment, the mounting bracket includes a mounting plate that is installed on the vehicle body. The mounting plate is fixed with a carburetor mounting plate for installing a carburetor and a fuel cut-off valve mounting plate for installing a fuel cut-off valve. The top of the fuel cut-off valve mounting plate is also fixed with a mounting bracket.

[0012] In a further embodiment, the second pipeline assembly includes a hose connected to the engine, and each connection end of the hose is secured with a hose clamp.

[0013] This application delivers liquid LPG from a gas storage cylinder to a carburetor via a pipeline assembly, wherein a fuel cut-off valve is used to control the on / off state; the carburetor vaporizes the liquid LPG and supplies it to the engine to provide fuel for the engine.

[0014] The beneficial effects of this utility model are as follows:

[0015] This application uses a fixed structure to fix the fuel pipe, fuel cut-off valve, and carburetor together to form an assembly, which facilitates installation on the whole machine and reduces the impact of the engine on it.

[0016] This application incorporates a coal tar discharge port in the carburetor, allowing for periodic drainage of coal tar, thereby extending the carburetor's service life and reducing maintenance costs. Various connectors and clamps facilitate installation and disassembly; fixed supports secure the piping to the vehicle body, preventing direct contact with the engine and reducing vibration and wear.

[0017] In this application, the fuel cut-off valve is a solenoid valve used to control the on / off of fuel LPG; the mounting bracket is mainly used to install the carburetor and the fuel cut-off valve, and then the mounting bracket is used to install it to the vehicle body.

[0018] The heating element is designed to facilitate the vaporization of liquid LPG. LPG needs to absorb heat to change from a liquid to a vapor state, and the heating element provides this heat. The inlet pipe in the heating element introduces hot water from the engine's coolant outlet into the carburetor. After passing through the carburetor, the hot water flows back to the engine's coolant inlet via the return pipe.

[0019] This application links the heating element with the engine's cooling water, using the heat from the engine's cooling water to heat and vaporize LPG, achieving recycling without the need for additional heating devices, thus greatly reducing production costs and saving energy.

[0020] Both ends of the inlet and outlet water pipes in this application are secured with water pipe clamps to ensure a secure and leak-proof installation. Furthermore, since the water pipes soften as hot water flows through them, to prevent them from coming into contact with the engine and causing wear or damage that could compromise safety, this application uses mounting brackets to fix the inlet and outlet water pipes to the vehicle body, avoiding interference with the engine and potential wear issues. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the structure of pipeline components one and two in this utility model.

[0023] Figure 3 This is a schematic diagram of the fuel shut-off valve in this utility model.

[0024] Figure 4 This is a schematic diagram of the vaporizer in this utility model.

[0025] Figure 5 This is a schematic diagram of the heating element in this utility model.

[0026] Figure 6 This is a schematic diagram of the structure of the fixing frame in this utility model.

[0027] In the diagram: 1 Pipeline assembly one, 1-1 Gas tank connecting pipe, 1-2 Tee fitting, 1-3 Fuel pipe, 1-4 Shut-off valve connecting pipe, 1-5 Connecting fitting, 1-6 Transition fitting;

[0028] 2. Fuel shut-off valve, 2-1 air inlet, 2-2 air outlet, 2-3 fixing hole, 2-4 control line;

[0029] 3. Vaporizer, 3-1 Vaporizer body, 3-2 Gas inlet, 3-3 Gas outlet, 3-4 Water inlet, 3-5 Water outlet, 3-6 Coal tar discharge outlet, 3-7 Mounting hole;

[0030] 4 heating element, 4-1 inlet pipe, 4-2 return pipe, 4-3 pipe fixing clamp, 4-4 pipe clamp, 4-5 first fixing bracket, 4-6 second fixing bracket;

[0031] 5. Fixing bracket; 5-1. Fixing plate; 5-2. Carburetor mounting plate; 5-3. Fuel shut-off valve mounting plate; 5-4. Mounting bracket.

[0032] 6. Piping assembly two, 6-1 hose, 6-2 hose clamp. Detailed Implementation

[0033] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0034] like Figure 1-6 As shown, an integrated LPG supply system includes a vaporizer 3 connected to a gas storage tank via a pipeline assembly 1. A fuel shut-off valve 2 is connected to the inlet end of the vaporizer 3. Both the vaporizer 3 and the fuel shut-off valve 2 are mounted on a mounting bracket 5. The system includes a gas chamber and a heating chamber. Filters are installed at the inlet and outlet ends of the gas chamber, and coal tar discharge ports 3-6 are opened at the front end of the filter screens. The gas outlet 3-3 of the vaporizer 3 is connected to an engine via a pipeline assembly 6. A heating pipe 4 for providing heat is connected to the heating chamber, and the heating pipe 4 is connected to the engine's cooling water circuit.

[0035] This application integrates the carburetor and fuel shut-off valve onto the same mounting bracket, reducing installation space and facilitating overall installation and maintenance. Fuel supply is controlled via the fuel shut-off valve, and the tee fitting with a pressure relief valve automatically releases pressure when the system pressure is too high, ensuring system safety.

[0036] LPG in the storage tank is delivered to the fuel cut-off valve via pipeline assembly one. The fuel cut-off valve controls the LPG flow rate. When the engine starts, the fuel cut-off valve opens, and the LPG enters the carburetor. Inside the carburetor, the LPG is vaporized into a gaseous state by the heat from the heating chamber, while impurities are filtered out through a filter screen. Impurities such as coal tar can be discharged through the coal tar vent. The LPG is then delivered to the engine for combustion via pipeline assembly two.

[0037] In this embodiment, the piping assembly 1 is as follows: Figure 1As shown, it includes a gas tank connecting pipe 1-1 connected to a gas tank. The gas tank connecting pipe 1-1 is connected to a fuel pipe 1-3 via a tee fitting 1-2 with a pressure relief valve. The fuel pipe 1-3 is connected to a shut-off valve connecting pipe 1-4 via a transition fitting 1-6. The shut-off valve connecting pipe 1-4 is connected to the air inlet 2-1 of a fuel shut-off valve 2. The fuel shut-off valve 2 is connected to the vaporizer 3 via a connecting fitting 1-5.

[0038] In a further embodiment, the second pipeline assembly 6 includes a hose 6-1 connected to the engine, and each end of the hose 6-1 is fitted with a hose clamp 6-2 for fastening, ensuring a secure and leak-proof installation.

[0039] In this embodiment, the fuel cut-off valve, the three-way connector 1-2 with pressure relief valve, the connecting connector 1-5 and the transition connector 1-6 are all components known in the art, and their structures are not changed. They can be purchased and used directly.

[0040] like Figure 4 As shown, the inlet 2-1 of the fuel shut-off valve 2 is connected to the connecting joint 1-5 in the pipeline assembly 1, and the outlet 2-2 is connected to the gas inlet 3-2 of the vaporizer 3. The fuel shut-off valve 2 is provided with a fixing hole 2-3, through which the fuel shut-off valve 2 is bolted to the fixing bracket 5. The fuel shut-off valve 2 is connected to a control line 2-4, which can be connected to a known computer or controller to control the opening and closing of the fuel shut-off valve 2 by input signals.

[0041] like Figure 4 As shown, the vaporizer 3 includes a vaporizer body 3-1, which contains a gas chamber and a heating chamber. The vaporizer body 3-1 has a gas inlet 3-2 and a gas outlet 3-3 communicating with the gas chamber, forming a gas passage. Filter screens are installed at the inlet and outlet ends of the gas chamber, and coal tar discharge ports 3-6 are located in front of the filter screens. The vaporizer body 3-1 has a water inlet 3-4 and a water outlet 3-5 communicating with the heating chamber, forming a heating water passage. The water inlet 3-4 and water outlet 3-5 are connected to the heating pipe 4. The vaporizer 3 is fixedly connected to the vaporizer mounting plate 5-2 on the fixing frame 5 using bolts through mounting holes 3-7.

[0042] The heat source for the carburetor comes from the engine's cooling water. The heat generated by the engine is transferred to the carburetor through the cooling water. Specifically, the high-temperature hot water output from the engine's cooling outlet enters the carburetor through the inlet pipe, enters the heating chamber to heat the LPG, and then flows back to the engine's cooling inlet through the outlet and return pipe, forming a closed-loop circulation system.

[0043] The vaporizer in this application is a component that integrates LPG impurity filtration and the vaporization of liquid LPG into gaseous LPG, thereby greatly improving the structural compactness of the system. The vaporizer is equipped with a filter screen and a coal tar discharge port, which can effectively filter and remove impurities and coal tar from the LPG, improving fuel gas quality.

[0044] Furthermore, since the carburetor in this application is mounted on the vehicle body via a mounting bracket rather than on the engine, its vibration is reduced, thereby lowering the filter damage rate and extending the carburetor's service life. Additionally, the presence of a coal tar vent in the carburetor allows for periodic drainage of coal tar, reducing the entry of coal tar and other impurities into the engine and preventing engine damage.

[0045] like Figure 5 As shown, the heating pipe 4 includes an inlet pipe 4-1 and a return pipe 4-2. The inlet of the inlet pipe 4-1 is connected to the cooling outlet of the engine, and the outlet is connected to the inlet 3-4 of the carburetor 3. The inlet of the return pipe 4-2 is connected to the outlet 3-5 of the carburetor 3, and the outlet is connected to the cooling inlet of the engine.

[0046] Preferably, the connection ends of the water inlet pipe 4-1 and the water return pipe 4-2 are both secured with pipe fixing clamps 4-3 to ensure a secure and leak-proof installation. The water inlet pipe 4-1 and the water return pipe 4-2 are respectively fixed to the vehicle body by the first fixing bracket 4-5 and the second fixing bracket 4-6 to avoid contact with the engine and to prevent wear from engine vibration and damage from high temperature.

[0047] like Figure 6 As shown, the mounting bracket 5 includes a mounting plate 5-1 that is mounted to the vehicle body. The mounting plate 5-1 is fixed with a carburetor mounting plate 5-2 for mounting a carburetor and a fuel cut-off valve mounting plate 5-3 for mounting a fuel cut-off valve. The top of the fuel cut-off valve mounting plate 5-3 is also fixed with a mounting bracket 5-4 for supporting the transition joint 1-6 in the pipeline assembly 1.

[0048] LPG in the storage tank is delivered to the fuel cut-off valve via pipeline assembly one. The fuel cut-off valve controls the LPG flow rate. When the engine starts, the fuel cut-off valve opens, and LPG enters the carburetor. Inside the carburetor, the LPG is vaporized into a gaseous state by the heat from the heating chamber, while impurities such as coal tar are filtered out through the filter screen and discharged through the coal tar outlet. The gaseous LPG flows out from the carburetor's gas outlet and is delivered to the engine for combustion via pipeline assembly two.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An integrated LPG gas supply system comprising a vaporizer (3) connected to a gas storage tank through a piping assembly one (1), characterized in that: The inlet end of the vaporizer (3) is connected to a fuel cut-off valve (2), and both the vaporizer (3) and the fuel cut-off valve (2) are mounted on a fixed frame (5). The vaporizer (3) is provided with a gas chamber and a heating chamber. The inlet and outlet ends of the gas chamber are respectively equipped with filter screens, and the gas chambers located at the front end of the filter screens are respectively provided with coal tar discharge ports (3-6). The gas outlet (3-3) of the vaporizer (3) is connected to the engine through the second pipeline assembly (6). The heating chamber is connected to a heating pipe (4) for providing heat, and the heating pipe (4) is connected to the engine's cooling water circuit.

2. An integrated LPG gas supply system as claimed in claim 1, wherein: The pipeline assembly (1) includes a gas tank connecting pipe (1-1) connected to a gas tank. The gas tank connecting pipe (1-1) is connected to a fuel pipe (1-3) via a tee fitting (1-2) with a pressure relief valve. The fuel pipe (1-3) is connected to a shut-off valve connecting pipe (1-4) via a transition fitting (1-6). The shut-off valve connecting pipe (1-4) is connected to the air inlet (2-1) of the fuel shut-off valve (2). The fuel shut-off valve (2) is connected to the vaporizer (3) via a connecting fitting (1-5).

3. An integrated LPG gas supply system as claimed in claim 1, wherein: The vaporizer (3) includes a vaporizer body (3-1), on which an air inlet (3-2) and an air outlet (3-3) communicating with the air chamber are provided to form an air passage; the vaporizer body (3-1) is provided with a water inlet (3-4) and a water outlet (3-5) communicating with the heating chamber to form a heating water passage, and the water inlet (3-4) and the water outlet (3-5) are respectively connected to the heating pipe (4).

4. An integrated LPG supply system as claimed in claim 3, wherein: The heating pipe (4) includes an inlet pipe (4-1) and a return pipe (4-2). The inlet of the inlet pipe (4-1) is connected to the cooling outlet of the engine and the outlet is connected to the inlet (3-4) of the carburetor (3). The inlet of the return pipe (4-2) is connected to the outlet (3-5) of the carburetor (3) and the outlet is connected to the cooling inlet of the engine.

5. An integrated LPG supply system as claimed in claim 4, wherein: The inlet pipe (4-1) and the return pipe (4-2) are both secured with pipe clamps (4-3); the inlet pipe (4-1) and the return pipe (4-2) are fixed to the vehicle body by the first fixed bracket (4-5) and the second fixed bracket (4-6) respectively to avoid contact with the engine.

6. An integrated LPG supply system as claimed in claim 1, wherein: The mounting bracket (5) includes a mounting plate (5-1) that is mounted to the vehicle body. The mounting plate (5-1) is fixed with a carburetor mounting plate (5-2) for mounting a carburetor and a fuel cut-off valve mounting plate (5-3) for mounting a fuel cut-off valve. The top of the fuel cut-off valve mounting plate (5-3) is also fixed with a mounting bracket (5-4) for supporting the pipeline assembly (1).

7. An integrated LPG supply system as claimed in claim 1, wherein: The second pipeline assembly (6) includes a hose (6-1) connected to the engine, and each end of the hose (6-1) is fitted with a hose clamp (6-2) for fastening.

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