Pilot type high-flow gas injection device

Abstract

The utility model relates to a pilot type high-flow gas injection device, which comprises an injection rail main rail, an injection rail main rail and an injection rail main rail, a spraying rail upper cover; an elastic membrane; each containing unit comprises an upper containing cavity formed in the injection rail upper cover and a lower containing cavity formed in the injection rail plate body and matched with the upper containing cavity. Each air pressure adjusting assembly comprises a valve element and an elastic piece, the valve element is arranged in the containing unit and arranged on the elastic membrane in a penetrating mode, the elastic piece is arranged in the upper containing cavity and abuts against the valve element, and a flow guide hole channel communicating with the air inlet flow channel and the upper containing cavity is formed in the valve element. A sealing gasket matched with the communicating valve is installed at the lower end of the valve element. And the at least one group of injection valves are used for controlling connection and disconnection between the upper accommodating cavity and the air outlet flow channel. The working state of a conventional injection valve can be completely simulated, and continuous and stable working of a gas engine is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas injection devices, specifically relating to a pilot-type high-flow-rate gas injection device. Background Technology

[0002] Gaseous fuels (including but not limited to ammonia, hydrogen, and natural gas) are an important component of available energy sources, often referred to as the third largest energy source after coal and oil. Gaseous fuel engines have the advantage of relatively low emissions of harmful pollutants and carbon dioxide, playing a crucial role not only in the efficient and clean use of energy but also in the effective utilization of industrial combustible waste gases. Energy conservation, emission reduction, and environmental protection are driving the technological advancement and widespread application of gas-fuel engines.

[0003] With the growth of global energy demand and the increasing awareness of environmental protection, gas-fueled engines, due to their environmentally friendly and efficient characteristics, are gradually becoming an important alternative to traditional internal combustion engines. The demand for gas engines is particularly increasing in heavy-duty vehicles and industrial applications.

[0004] With the increasing demand for gas fuel engines, especially gas engines and gas turbines which require gas injection valves with large flow areas to meet high power requirements, and gas fuels having a volume more than 600 times larger than liquid fuels, a more efficient gas injection system is needed. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pilot-type high-flow-rate gas injection device.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a pilot-operated high-flow-rate gas injection device, comprising:

[0007] The main spray rail includes a spray rail plate, an inlet air passage formed in the spray rail plate, an outlet air passage formed in the spray rail plate, and at least one connecting valve installed in the spray rail plate to connect the inlet air passage and the outlet air passage.

[0008] A spray rail cover is installed on the upper surface of the spray rail plate.

[0009] An elastic diaphragm is installed between the spray rail plate and the spray rail cover;

[0010] At least one set of the receiving units, each set of the receiving units includes an upper receiving cavity opened in the upper cover of the spray rail and a lower receiving cavity opened in the body of the spray rail plate and cooperating with the upper receiving cavity;

[0011] At least one set of air pressure regulating components, each set of air pressure regulating components includes a valve core disposed in the receiving unit and passing through the elastic diaphragm, and an elastic element disposed in the upper receiving cavity and abutting against the valve core. The valve core has a guide channel that connects the air intake channel and the upper receiving cavity. The lower end of the valve core is equipped with a sealing gasket that cooperates with the connecting valve.

[0012] At least one set of injection valves, each set of injection valves simultaneously connecting the upper receiving cavity and the outlet air passage, for controlling the opening and closing of the upper receiving cavity and the outlet air passage.

[0013] Ideally, the connecting valve has an air passage.

[0014] The air passage has two states: open and sealed. When the air passage is in the sealed state, the elastic element acts on the valve core to press the sealing gasket against the air passage, and the inlet air passage and the outlet air passage are isolated.

[0015] When the air passage is open, the elastic diaphragm deforms, causing the elastic element to be compressed.

[0016] Furthermore, it also includes:

[0017] Two temperature sensors are respectively installed on two sides of the spray rail plate and extend into the air inlet channel and the air outlet channel.

[0018] Furthermore, it also includes two pressure sensors, which are respectively mounted on the same or different sides of the spray rail plate and extend into the air inlet channel and the air outlet channel.

[0019] Furthermore, the spray rail cover is detachably mounted on the upper surface of the spray rail main rail by multiple fasteners.

[0020] Furthermore, the air pressure regulating assembly also includes a guide pressing block disposed in the upper receiving cavity and penetrated by the elastic element, and a lower guide block disposed in the lower receiving cavity and penetrated by the valve core.

[0021] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: The pilot-type high-flow gas injection device of this utility model, through the use of a specific structure of injection rail main rail, injection rail cover, elastic diaphragm, receiving unit, air pressure regulating component and injection valve, adopts a simple component structure, which not only solves the defect of insufficient flow of conventional injection valve, but also reduces the modification of gas engine structure and saves the cost of component replacement. It can completely simulate the working state of conventional injection valve, so that the gas in the intake channel is mixed evenly, ensuring the continuous and stable operation of gas engine. Attached Figure Description

[0022] Figure 1 This is a perspective view of the pilot-type high-flow-rate gas injection device of this utility model;

[0023] Figure 2 This is a schematic diagram of the pilot-type high-flow-rate gas injection device of this utility model;

[0024] Figure 3 for Figure 2 AA section view;

[0025] Figure 4 This is a top view of the pilot-type high-flow-rate gas injection device of this utility model. Detailed Implementation

[0026] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0027] like Figures 1 to 4 The pilot-type high-flow-rate gas injection device shown mainly includes a main injection rail 1, an elastic diaphragm 2, an upper cover of the injection rail 3, a receiving unit, a gas pressure regulating component, and an injection valve 1'.

[0028] The main jet rail 1 includes a jet rail plate 10, an inlet air passage 11 formed within the jet rail plate 10, an outlet air passage 12 formed within the jet rail plate 10, and at least one connecting valve 8 installed within the jet rail plate 10 to connect the inlet air passage 11 and the outlet air passage 12 (the specific number of connecting valves 8 can be conventionally selected according to actual needs to adapt to the gas engine; in this embodiment, there are six). The specific shape and structure of the inlet air passage 11 and the outlet air passage 12 are not limited. In this embodiment, the inlet air passage 11 and the outlet air passage 12 are parallel to each other, and their longitudinal sections are both circular.

[0029] The spray rail cover 3 is installed on the upper surface of the spray rail plate 10, and the elastic diaphragm 2 is installed between the spray rail plate 10 and the spray rail cover 3. Specifically, the spray rail cover 3 is detachably installed on the upper surface of the main spray rail 1 by multiple fasteners 31, thereby using multiple fasteners 31 to install the elastic diaphragm 2 between the spray rail plate 10 and the spray rail cover 3. The specific number of fasteners 31 can be conventionally selected according to actual needs. In this embodiment, there are fourteen fasteners, such as... Figure 4 As shown.

[0030] The number of housing units, air pressure regulating components and injection valves are the same as the number of the aforementioned connecting valves 8, so that they correspond one-to-one.

[0031] Each set of receiving units includes an upper receiving cavity opened in the spray rail cover 3 and a lower receiving cavity opened in the spray rail plate 10 and cooperating with the upper receiving cavity (the upper receiving cavity and the lower receiving cavity are separated by an elastic diaphragm 2), so that the upper receiving cavity and the lower receiving cavity form a complete receiving unit.

[0032] Each pressure regulating assembly includes a valve core 6 disposed within the receiving unit and passing through an elastic diaphragm 2 (the valve core 6 and the elastic diaphragm 2 need to be connected together so that when the elastic diaphragm 2 deforms, it can drive the valve core 6 to move synchronously; the specific connection method can adopt existing conventional methods, such as setting a groove on the circumferential surface of the valve core 6 that is compatible with the elastic diaphragm 2, thereby using the groove to hold the elastic diaphragm 2) and an elastic element 4 disposed within the upper receiving cavity and abutting against the valve core 6 (in this application, conventional springs or the like can be used). A limiting protrusion can be formed on the top wall of the upper receiving cavity so that the elastic element 4 is fitted on the limiting protrusion, improving the stability and reliability of the elastic element 4; in this embodiment, when the elastic diaphragm 2 deforms and drives the valve core 6 to move, the valve core 6 squeezes the elastic element 4 to compress and deform it; when the elastic diaphragm 2 returns to its initial state, the elastic element 4 also returns to its initial state. The valve core 6 has a guide channel 61 that connects the air intake channel 11 and the upper receiving cavity (i.e., the guide channel 61 connects the lower receiving cavity and the upper receiving cavity). The lower end of the valve core 6 is equipped with a sealing gasket 62 that cooperates with the connecting valve 8. When the elastic diaphragm 2 is in the initial state, due to the pre-action force of the elastic element 4 (at this time, the elastic element 4 is slightly compressed or not compressed), the sealing gasket 62 is tightly attached to the upper end of the connecting valve 8, thereby sealing the connecting valve 8 (the elastic element 4 can). When the elastic diaphragm 2 deforms and drives the valve core 6 to move upward, the elastic element 4 is compressed and deformed, and the sealing gasket 62 and the connecting valve 8 are released from the sealing state.

[0033] Each set of injection valves 1' simultaneously connects the upper receiving cavity and the outlet air passage 12, and is used to control the opening and closing of the connection between the upper receiving cavity and the outlet air passage 12. The specific installation position of the injection valve 1' is not limited, and can be conventionally selected according to actual needs; in this application, the injection valve 1' is installed on the side of the main spray rail 1 and the upper cover 3 of the spray rail, so that the lower part of the injection valve 1' is connected to the outlet air passage 12 and the upper part of the injection valve 1' is connected to the upper receiving cavity.

[0034] In this embodiment, the connecting valve 8 has an air passage 81, which connects the inlet air passage 11 and the outlet air passage 12. As mentioned above, the air passage 81 has two states: open and sealed. When the air passage 81 is sealed, the elastic element 4 acts on the valve core 6 to press the sealing gasket 62 against the air passage 81, thus isolating the inlet air passage 11 and the outlet air passage 12. When the air passage 81 is open, the elastic diaphragm 2 deforms, compressing the elastic element 4, thus connecting the inlet air passage 11 and the outlet air passage 12.

[0035] In this embodiment, the pilot-type high-flow-rate gas injection device may further include two temperature sensors 14 and two pressure sensors 9. The two temperature sensors 14 are respectively installed on two sides of the injection rail plate 10. Figure 2 The two pressure sensors 9 are respectively installed on the left and right sides of the spray rail plate 10 and extend into the inlet air passage 11 and the outlet air passage 12; the two pressure sensors 9 are respectively installed on the same or different sides of the spray rail plate 10 (in this application, they are on the same side, i.e.) Figure 4 The lower side of the gas supply is inserted into the inlet gas channel 11 and the outlet gas channel 12 respectively, so as to better monitor and control the stability of the gas supply.

[0036] In this embodiment, the air pressure regulating assembly also includes a guide pressing block 5 disposed in the upper receiving cavity and penetrated by the elastic element 4, and a lower guide block 7 disposed in the lower receiving cavity and penetrated by the valve core 6. This is because the elastic diaphragm 2 is a deformable material, and the addition of the guide pressing block 5 and the lower guide block 7 can ensure the controllability of the movement state of the valve core 6.

[0037] The working principle of the above-mentioned pilot-operated high-flow-rate gas injection device is roughly as follows:

[0038] The air inlet of the pilot-operated high-flow-rate gas injection device (inlet air passage 11) Figure 2 The left side forms the air intake and air outlet 12. Figure 2 An air outlet is formed on the right side; it can be seen that the inlet air passage 11 and the outlet air passage 12 are located in... Figure 1 (The horizontal direction of the spray rail plate 10 is not penetrated) After the gas is introduced, the gas fills the lower cavity of the spray rail plate 10. At the same time, the gas flows into the upper cavity of the spray rail cover 3 through the guide channel 61 in the middle of the valve core 6. At this time, the gas pressure in the spray rail cover 3 is equal to the gas pressure in the air inlet channel 11 of the spray rail plate 10. Due to the action of the elastic element 4, the sealing gasket 62 at the lower end of the valve core 6 is tightly pressed on the air passage 81 of the connecting valve 8, thereby isolating the air inlet and the air outlet (that is, isolating the air inlet channel 11 and the air outlet channel 12).

[0039] When the pilot-type high-flow-rate gas injection device is working, the gas pressure in the upper cavity of the spray rail cover 3 and the gas pressure in the lower cavity of the spray rail plate 10 are in a balanced state. At this time, the injection valve 1' is opened, and the gas in the upper cavity of the spray rail cover 3 flows into the outflow channel 12 through the injection valve 1'. This breaks the pressure balance between the upper cavity of the spray rail cover 3 and the lower cavity of the spray rail plate 10. The pressure in the upper cavity of the spray rail cover 3 is much smaller than the pressure in the lower cavity of the spray rail plate 10.

[0040] The elastic diaphragm 2 is slightly deformed, the elastic element 4 is compressed, the valve core 6 moves upward, and the seal at the lower end of the valve core 6 fails (the sealing gasket 62 is disengaged from the air passage 81). The gas (i.e. fuel gas) entering from the inlet passage 11 enters the outlet passage 12 through the air passage 81 to supply gas fuel to the gas engine. (The size of the air passage 81 can be adjusted according to the gas fuel flow rate requirement of the gas engine. At this time, the flow rate is much greater than the limit flow rate of the conventional gas injection valve. If a single chamber cannot meet the flow rate, the device can also meet the simultaneous supply of multiple chambers to meet the gas engine's gas fuel flow rate requirement.)

[0041] When the pilot-operated high-flow gas injection device completes the gas fuel supply, the injection valve 1' is closed. Since the gas in the cavity of the upper cover 3 of the injection rail no longer leaks out, the gas pressure in the cavity of the upper cover 3 of the injection rail gradually builds up, which then directly acts on the elastic diaphragm 2, causing the valve core 6 to move downward. After the gas pressure in the cavity of the upper cover 3 of the injection rail is balanced with the pressure in the cavity of the lower cover 10 of the injection rail plate, under the action of the elastic element 4, the sealing gasket 62 at the lower end of the valve core 6 is tightly pressed on the air passage 81 of the connecting valve 8, thereby isolating the air inlet and the air outlet.

[0042] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A pilot-operated high-flow-rate gas injection device, characterized in that, It includes: The main spray rail (1) includes a spray rail plate (10), an air inlet channel (11) opened in the spray rail plate (10), an air outlet channel (12) opened in the spray rail plate (10), and at least one connecting valve (8) installed in the spray rail plate (10) to connect the air inlet channel (11) and the air outlet channel (12). The spray rail cover (3) is installed on the upper surface of the spray rail plate (10); An elastic diaphragm (2) is installed between the spray rail plate (10) and the spray rail cover (3); At least one set of receiving units, each set of receiving units including an upper receiving cavity opened in the upper cover (3) of the spray rail and a lower receiving cavity opened in the spray rail plate (10) and cooperating with the upper receiving cavity; At least one set of air pressure regulating components, each set of air pressure regulating components includes a valve core (6) disposed in the receiving unit and passing through the elastic diaphragm (2) and an elastic element (4) disposed in the upper receiving cavity and abutting the valve core (6). The valve core (6) has a guide channel (61) that connects the air intake channel (11) and the upper receiving cavity. The lower end of the valve core (6) is equipped with a sealing gasket (62) that cooperates with the connecting valve (8). At least one set of injection valves (1'), each set of injection valves (1') simultaneously connects the upper receiving cavity and the outlet air passage (12) to control the opening and closing between the upper receiving cavity and the outlet air passage (12).

2. The pilot-operated high-flow-rate gas injection device according to claim 1, characterized in that: The connecting valve (8) has an air passage (81) inside. The air passage (81) has two states: open and sealed. When the air passage (81) is in the sealed state, the elastic element (4) acts on the valve core (6) to make the sealing gasket (62) press against the air passage (81), and the inlet air passage (11) and the outlet air passage (12) are isolated. When the air passage (81) is in the open state, the elastic diaphragm (2) deforms, causing the elastic element (4) to be compressed.

3. The pilot-operated high-flow-rate gas injection device according to claim 1 or 2, characterized in that, It also includes: Two temperature sensors (14) are respectively installed on two sides of the spray rail plate (10) and extend into the air inlet channel (11) and the air outlet channel (12).

4. The pilot-operated high-flow-rate gas injection device according to claim 1 or 2, characterized in that, It also includes two pressure sensors (9), which are respectively installed on the same or different sides of the spray rail plate (10) and extend into the air inlet channel (11) and the air outlet channel (12).

5. The pilot-operated high-flow-rate gas injection device according to claim 1 or 2, characterized in that: The spray rail cover (3) is detachably mounted on the upper surface of the spray rail main rail (1) by multiple fasteners (31).

6. The pilot-operated high-flow-rate gas injection device according to claim 1 or 2, characterized in that: The air pressure regulating assembly also includes a guide pressing block (5) disposed in the upper receiving cavity and penetrated by the elastic element (4) and a lower guide block (7) disposed in the lower receiving cavity and penetrated by the valve core (6).

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