Fuel gas pressure reducing valve and generator

Abstract

The utility model discloses a fuel gas pressure reducing valve which comprises a valve body, a gas inlet pipe and a gas outlet pipe, the gas inlet pipe and the gas outlet pipe are communicated with a gas channel in the valve body, a fuel gas conversion assembly is arranged on the gas channel in the valve body, and the fuel gas conversion assembly is located between the gas inlet pipe and the gas outlet pipe. The fuel gas conversion assembly comprises a conversion valve body, a CNG vent hole and an LPG vent hole are formed in the conversion valve body, and the CNG vent hole communicates with the LPG vent hole. The gas pressure reducing valve provided by the utility model has higher product consistency and safety. The generator provided by the utility model is strong in product stability, compact in structure, simple and convenient to operate, and better in user experience.

Description

Technical Field

[0001] The utility model relates to a gas pressure reducing valve and a generator, belonging to the technical field of generator pressure reducing valves. Background Art

[0002] The existing gas / oil dual-fuel generator can selectively use gas or oil as the power source according to the needs when in use, which not only solves the problems of pollution and fuel consumption, but also meets the requirements of power and convenient mobility. Dual-fuel generators usually use oil-gas conversion switches to achieve the switching of gas or oil.

[0003] In order to improve the power performance of generators and reduce costs, more and more generators are beginning to use three fuels, that is, on the basis of dual fuel, two types of fuel gas, compressed natural gas (CNG for short) and liquefied petroleum gas (LPG for short) are used. In existing generator sets, split oil and gas dual-purpose carburetors and pressure reducing valves are mostly used. Both carburetors and pressure reducing valves need to be switched between gas and oil and between gas and gas through external conversion switches.

[0004] However, too many switches will make the gas path longer, which may lead to large differences in gas pressure, causing emissions to exceed standards, and fuel leakage is easy to occur at the connection points of the switches. At the same time, adding too many switches will increase the number of variables that need to be controlled, making it difficult to ensure product consistency. Utility Model Content

[0005] The utility model provides a gas pressure reducing valve, which solves the technical problem in the prior art that too many external conversion switches are arranged, resulting in an excessively long gas path.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a gas pressure reducing valve, including a valve body, an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe are connected to the air passage in the valve body, a gas conversion assembly is arranged on the air passage in the valve body, and the gas conversion assembly is located between the air inlet pipe and the air outlet pipe; the gas conversion assembly includes a conversion valve body, a CNG vent and an LPG vent are opened on the conversion valve body, and the CNG vent and the LPG vent are connected.

[0007] Preferably, the valve body includes a first mounting seat, a first air duct is arranged in the first mounting seat, and the air intake pipe is connected with the first air duct; a pressure sensor and a solenoid valve are arranged on the first air duct, and the solenoid valve is used for connecting and closing the air intake pipe with the first air duct.

[0008] Preferably, the valve body comprises a second mounting seat, a second air passage is arranged in the second mounting seat, the air outlet pipe is communicated with the second air passage; and the conversion valve body is mounted on the second air passage.

[0009] Preferably, the conversion valve body is mounted on the second mounting seat via a mounting plate; a knob is provided on the conversion valve body, a knob mounting hole is provided on the mounting plate, and the knob mounting hole matches the knob. The knob is provided on the conversion valve body for easy manual operation.

[0010] Preferably, a waist-shaped limiting hole is provided on the mounting pressure plate, and a limiting pin is fixed on the conversion valve body; the limiting pin matches the limiting hole. The matching of the limiting pin and the limiting hole facilitates the shifting operation.

[0011] Preferably, a connecting seat is provided between the first mounting seat and the second mounting seat, and a limiting column is provided on the connecting seat; the limiting column cooperates with a bolt to fix the valve body on the generator panel.

[0012] Preferably, three limiting columns are provided, and a triangular structure is formed between the three limiting columns. A triangular stable structure is formed between the limiting columns, and its connection strength is reliable. The three limiting columns are located between the first mounting seat and the second mounting seat, so that the structure of the gas pressure reducing valve is compact, which is conducive to reducing the overall volume of the gas pressure reducing valve.

[0013] Preferably, a mounting groove is radially opened on the conversion valve body, and a sealing ring is installed in the mounting groove; the mounting groove is located above the CNG vent hole and the LPG vent hole. A sealing ring is arranged on the conversion valve body to ensure the air tightness of the pressure reducing valve.

[0014] Preferably, the air inlet pipe and the air outlet pipe are arranged vertically, so that the structure of the gas pressure reducing valve is compact, which is conducive to reducing the overall volume of the gas pressure reducing valve.

[0015] The gas pressure reducing valve of the utility model integrates a gas conversion component in the pressure reducing valve body, and provides a CNG vent and an LPG vent on the gas conversion valve body for conversion between gases, thereby effectively reducing parts and pipeline paths and improving product consistency; since the gas pipeline joints are reduced, the risk of joint leakage is avoided, and the product has higher safety.

[0016] The utility model also provides a generator, comprising the above-mentioned gas pressure reducing valve, a carburetor and a controller, wherein the carburetor is provided with a carburetor solenoid valve; the controller is electrically connected with the pressure sensor, the solenoid valve and the carburetor solenoid valve.

[0017] The generator of the utility model uses a pressure sensor to detect the gas pressure, and realizes automatic switching between fuel oil and gas through the solenoid valve on the gas pressure reducing valve and the carburetor solenoid valve. On the one hand, it shortens the path of the fuel pipeline in the generator, and the product has strong stability and a more compact structure; on the other hand, it reduces complicated operations, greatly improves the customer's operating convenience, and provides a better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a gas pressure reducing valve provided by the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the gas conversion assembly in the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the conversion valve body in the utility model;

[0021] Figure 4 It is a schematic diagram of the gas flow in the gas pressure reducing valve of the utility model.

[0022] Among them: 1-valve body, 101-first mounting seat, 1011-first air channel, 102-second mounting seat, 1021-second air channel, 103-connecting seat, 1031-limiting column, 2-inlet pipe, 3-outlet pipe, 4-pressure sensor, 5-solenoid valve, 6-gas conversion assembly, 601-conversion valve body, 6011- CNG vent, 6012- LPG vent, 602-knob, 7-sealing ring, 8-limiting pin, 9-mounting plate, 901-knob mounting hole, 902-limiting hole. DETAILED DESCRIPTION

[0023] In order to better understand the essence of the present invention, the present invention is further described below in conjunction with specific embodiments and drawings.

[0024] The utility model is particularly suitable for silent variable frequency generators, and specifically relates to a gas pressure reducing valve, such as Figures 1 to 3 As shown, it includes a valve body 1, an air inlet pipe 2 and an air outlet pipe 3, wherein the air inlet pipe 2 and the air outlet pipe 3 are connected to the air passage in the valve body 1; a gas conversion assembly 6 is rotatably connected to the air passage in the valve body 1, and the gas conversion assembly 6 is located between the air inlet pipe 2 and the air outlet pipe 3; the gas conversion assembly 6 includes a conversion valve body 601, and a CNG vent 6011 and an LPG vent 6012 are provided on the conversion valve body 601, and the CNG vent 6011 and the LPG vent 6012 are connected. In practical applications, the flow rates of CNG and LPG can be adjusted by selecting different apertures of the CNG vent 6011 and the LPG vent 6012, thereby reducing the pipeline path for setting up a gas conversion switch separately, and reducing the risk of gas leakage at each joint on the pipeline.

[0025] In some embodiments of the utility model, the valve body 1 includes a first mounting seat 101, a first air duct 1011 is arranged in the first mounting seat 101, and the intake pipe 2 is connected with the first air duct 1011; a pressure sensor 4 and a solenoid valve 5 are arranged on the first air duct 1011, and the solenoid valve 5 is used for connecting and closing the intake pipe 2 and the first air duct 1011.

[0026] In some embodiments of the present invention, the valve body 1 includes a second mounting seat 102 , a second air passage 1021 is provided in the second mounting seat 102 , and the air outlet pipe 3 is connected to the second air passage 1021 ; the conversion valve body 601 is installed on the second air passage 1021 .

[0027] As a preferred embodiment of the utility model, the conversion valve body 601 is fixed on the second mounting seat 102 through the mounting plate 9; the conversion valve body 601 is provided with a knob 602, and the mounting plate 9 is provided with a knob mounting hole 901, and the knob mounting hole 901 matches the knob 602. The knob is provided on the conversion valve body for easy manual operation.

[0028] As a preferred embodiment of the utility model, a waist-shaped limiting hole 902 is provided on the mounting plate 9, and a limiting pin 8 is fixed on the conversion valve body 601; the limiting pin 8 matches the limiting hole 902 to facilitate the shifting operation.

[0029] In some embodiments of the present invention, a mounting groove is radially provided on the conversion valve body 601, and a sealing ring 7 is installed in the mounting groove; the mounting groove is located above the CNG vent 6011 and the LPG vent 6012. A sealing ring is provided on the conversion valve body to ensure the air tightness of the pressure reducing valve.

[0030] In some embodiments of the utility model, a connecting seat 103 is provided between the first mounting seat 101 and the second mounting seat 102, and a limiting column 1031 is provided on the connecting seat 103; the limiting column 1031 cooperates with the bolt to fix the valve body 1 on the generator panel. As a preferred embodiment of the utility model, three limiting columns 1031 are provided, and a triangular stable structure is formed between the limiting columns, and the connection strength is reliable. The three limiting columns are located between the first mounting seat and the second mounting seat, so that the structure of the gas pressure reducing valve is compact, which is conducive to reducing the overall volume of the gas pressure reducing valve.

[0031] In some embodiments of the utility model, the air inlet pipe 2 and the air outlet pipe 3 are arranged vertically, so that the structure of the gas pressure reducing valve is compact, which is conducive to reducing the overall volume of the gas pressure reducing valve.

[0032] The utility model also provides a generator, including the above-mentioned gas pressure reducing valve, carburetor and controller, wherein the carburetor is provided with a carburetor solenoid valve; the controller is electrically connected to the pressure sensor 4, the solenoid valve 5 and the carburetor solenoid valve. The generator of the utility model is provided with the solenoid valve 5 at the gas inlet end to ensure that there is no risk of gas leakage; at the same time, the carburetor solenoid valve is installed on the carburetor to ensure that the carburetor is cut off from fuel when the generator uses gas, so as to avoid the phenomenon of mixed combustion of oil and gas.

[0033] When the generator of the utility model is connected to the gas, Figure 4 As shown, the pressure sensor 4 detects the gas pressure of the gas and transmits the pressure signal to the controller. The controller turns on the carburetor solenoid valve to cut off the fuel supply, and at the same time controls the solenoid valve 5 to open, so that the gas enters the power combustion chamber for combustion, thereby realizing the automatic switching between gas and fuel.

[0034] When different fuel gases need to be used, the CNG vent hole 6011 is connected to the gas passage in the valve body 1, or the LPG vent hole 6012 is connected to the gas passage in the valve body 1, so as to achieve the selection of different fuel gases.

[0035] It should be noted that although the utility model is described through the above embodiments, the utility model can also have other various embodiments. Without departing from the spirit and scope of the utility model, it is obvious that those skilled in the art can make various corresponding changes and deformations to the utility model, but these changes and deformations should fall within the scope of protection of the attached claims of the utility model and their equivalents.

Claims

1. A gas pressure reducing valve, comprising a valve body (1), an air inlet pipe (2) and an air outlet pipe (3), wherein the air inlet pipe (2) and the air outlet pipe (3) are connected to an air passage in the valve body (1), and characterized in that: A gas conversion assembly (6) is rotatably connected to the air passage in the valve body (1), and the gas conversion assembly (6) is located between the air inlet pipe (2) and the air outlet pipe (3); the gas conversion assembly (6) comprises a conversion valve body (601), and the conversion valve body (601) is provided with a CNG vent hole (6011) and an LPG vent hole (6012); when the CNG vent hole (6011) or the LPG vent hole (6012) is connected to the air passage, the air inlet pipe (2) and the air outlet pipe (3) are connected.

2. The gas pressure reducing valve according to claim 1, characterized in that: The valve body (1) comprises a first mounting seat (101), a first air passage (1011) is arranged in the first mounting seat (101), and the air intake pipe (2) is connected to the first air passage (1011); a pressure sensor (4) and a solenoid valve (5) are arranged on the first air passage (1011), and the solenoid valve (5) is used for connecting and closing the air intake pipe (2) and the first air passage (1011).

3. The gas pressure reducing valve according to claim 2, characterized in that: The valve body (1) comprises a second mounting seat (102), a second air channel (1021) is arranged in the second mounting seat (102), the air outlet pipe (3) is in communication with the second air channel (1021); and the conversion valve body (601) is mounted on the second air channel (1021).

4. The gas pressure reducing valve according to claim 3, characterized in that: The conversion valve body (601) is mounted on the second mounting seat (102) via a mounting pressure plate (9); a knob (602) is provided on the conversion valve body (601), and a knob mounting hole (901) is provided on the mounting pressure plate (9), wherein the knob mounting hole (901) matches the knob (602).

5. The gas pressure reducing valve according to claim 4, characterized in that: A waist-shaped limiting hole (902) is provided on the mounting pressure plate (9), and a limiting pin (8) is fixed on the conversion valve body (601); the limiting pin (8) matches the limiting hole (902).

6. The gas pressure reducing valve according to claim 3, characterized in that: A connecting seat (103) is provided between the first mounting seat (101) and the second mounting seat (102), and a limiting column (1031) is provided on the connecting seat (103); the limiting column (1031) cooperates with a bolt to fix the valve body (1) on the generator panel.

7. The gas pressure reducing valve according to claim 6, characterized in that: Three limiting posts (1031) are provided, and a triangular structure is formed between the three limiting posts (1031).

8. The gas pressure reducing valve according to claim 1, characterized in that: The conversion valve body (601) is radially provided with an installation groove, in which a sealing ring (7) is installed; the installation groove is located above the CNG vent hole (6011) and the LPG vent hole (6012).

9. The gas pressure reducing valve according to claim 1, characterized in that: The air inlet pipe (2) and the air outlet pipe (3) are arranged vertically.

10. A generator, characterized in that: It comprises the gas pressure reducing valve as claimed in claim 2, a carburetor and a controller, wherein the carburetor is provided with a carburetor solenoid valve; the controller is electrically connected to the pressure sensor (4), the solenoid valve (5) and the carburetor solenoid valve.

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