Multi-fuel pressure reducing valve integrated steam carburetor

Abstract

The utility model discloses a multi-fuel pressure reducing valve integrated steam carburetor which is used for mixed atomization of fuel gas such as liquefied petroleum gas (LPG) and liquefied natural gas (LNG). The core structure of the carburetor comprises a carburetor body, a throat pipe and a main air channel are arranged on the carburetor body, a pressure reduction structure is integrated on the carburetor body, the problem that a traditional gas carburetor is complex in structure due to the fact that a pressure reducer is additionally arranged is solved, meanwhile, stable control over gas pressure is achieved, and mixing atomization uniformity and engine operation reliability are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engine fuel supply systems, and specifically relates to a multi-fuel pressure reducing valve integrated vaporizer for various gases such as liquefied petroleum gas (LPG) and liquefied natural gas (LNG). The integrated pressure reducing structure achieves stable gas pressure and uniform mixing, thereby improving engine operation stability. Background Art

[0002] As a core engine component, the carburetor achieves the proper mixing and atomization of gasoline and air through vacuum, making it crucial for stable engine operation. With the advancement of gas engine technology, carburetors powered by liquefied petroleum gas (LPG) and liquefied natural gas (LNG) are becoming increasingly popular. However, these gases require stable pressure control during the aeration process. Traditional solutions often require an additional pressure reducer at the carburetor's intake port, complicating the overall structure and significantly impacting the rationality of the engine's structure and component layout.

[0003] Therefore, there is an urgent need for an integrated structure that integrates the decompression function into the carburetor body, which can not only simplify the overall structure, but also stabilize the gas pressure, ensure the mixed atomization effect and engine operation stability. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-fuel pressure reducing valve integrated carburetor. By integrating the pressure reducing structure into the carburetor body, the structural complexity problem of traditional gas carburetor caused by the additional configuration of the pressure reducer is solved, and at the same time, stable control of the gas pressure is achieved, thereby improving the uniformity of the mixed atomization and the reliability of the engine operation.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a multi-fuel pressure reducing valve integrated carburetor for mixed atomization of multiple fuels such as liquefied petroleum gas and liquefied natural gas, comprising a carburetor body, the carburetor body being provided with a throat and a main air passage leading to the throat; an air intake chamber being provided at the lower end of the carburetor body, a rocker arm being rotatably mounted in the air intake chamber; an inlet end of the main air passage being provided in the air intake chamber, an air intake passage being provided on the inner wall of the air intake chamber, and the air intake passage being externally connected to an air intake pipe joint;

[0006] A blocking block is provided at one end of the rocker arm, and a return spring is provided between the rocker arm and the inner wall of the intake chamber. The return spring is used to drive the rocker arm to make the blocking block block the outlet end of the intake passage. The lower end opening of the intake chamber is blocked by a rubber diaphragm, and a plug rod is fixedly connected to the middle of the diaphragm, and the plug rod is provided with an annular slot. A shift fork is provided at the other end of the rocker arm, and the shift fork is inserted into the slot and is transmission-connected thereto.

[0007] The cross section of the annular edge of the diaphragm is an inwardly curved arc; a rotating shaft is provided in the middle of the rocker arm, and a rotating groove for receiving the rotating shaft is provided above the inner wall of the air intake cavity. The opening edge of the rotating groove is fixed by screws so that the rotating shaft is locked in the rotating groove;

[0008] An annular valve sleeve is plugged at the outlet of the air inlet channel, and the inner diameter of the center hole of the valve sleeve is smaller than the size of the blocking block; the blocking block is a circular rubber plate, and when the blocking block blocks the valve sleeve, the center axis of the valve sleeve is aligned with the center axis of the blocking block.

[0009] Furthermore, the arc-shaped bending direction of the annular edge of the diaphragm is consistent with the deformation direction of the diaphragm when it expands under negative pressure, so as to improve the smoothness of the diaphragm movement.

[0010] Furthermore, the connection portion between the rocker arm and the rotating shaft is rotationally matched, and the diameter of the rotating shaft is adapted to the width of the rotating slot, thereby ensuring the stability of the rocker arm when the rocker arm rotates around the rotating shaft.

[0011] Furthermore, both ends of the return spring abut against one end of the rocker arm and a positioning boss on the inner wall of the intake cavity respectively. The positioning boss is integrally formed with the inner wall of the intake cavity and is used to limit the position of the return spring. Beneficial effects

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. Structural Integration: The decompression function is integrated into the carburetor body, eliminating the need for an additional pressure reducer, simplifying the overall structure, optimizing the layout of engine components, and reducing assembly difficulty and cost.

[0014] 2. Air pressure stabilization control: The diaphragm senses the pressure changes in the air intake chamber, and the rocker arm, blocking block and valve sleeve are linked to dynamically adjust the opening of the air intake channel to achieve automatic stabilization of the air pressure in the air intake chamber, avoiding the problem of uneven gas mixing caused by pressure fluctuations.

[0015] 3. Multi-fuel adaptability: Designed based on the characteristics of liquefied petroleum gas, liquefied natural gas and other gases, the rubber sealing block and diaphragm, as well as the curved edge diaphragm structure, improve the compatibility with different gases and ensure the mixed atomization effect.

[0016] 4. High reliability: The arc-shaped design of the diaphragm edge and the rotation limit structure of the rotating shaft reduce movement wear; the elastic reset of the return spring and the pressure feedback of the diaphragm form a closed-loop control to ensure stability in long-term use.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A perspective view of a specific embodiment of the present utility model;

[0019] Figure 2 A cross-sectional view of a specific embodiment of the present utility model;

[0020] Figure 3 This is a diagram showing the installation state of the rocker arm in a specific embodiment of the present invention;

[0021] Figure 4 It is a partial three-dimensional diagram of a specific embodiment of the utility model.

[0022] Description of reference numerals:

[0023] 1-carburetor body; 2-throat; 3-main air channel; 4-intake chamber; 5-rocker arm; 6-blocking block; 7-return spring; 8-intake channel; 9-intake pipe joint; 10-diaphragm; 11-insert rod; 12-slot; 13-shift fork; 14-swivel; 15-rotation groove; 16-screw; 17-valve sleeve; 18-O-ring 18. DETAILED DESCRIPTION

[0024] The present invention is described in detail below through examples, which are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention.

[0025] like Figure 1 — Figure 4 As shown, this embodiment discloses a multi-fuel pressure reducing valve integrated carburetor for mixing and atomizing gases such as liquefied petroleum gas (LPG) and liquefied natural gas (LNG). Its core structure includes a carburetor body 1, on which is disposed a throat pipe 2 and a main air passage 3 (the main air passage 3 connects to the throat pipe 2 to deliver the mixed gas to the engine combustion chamber).

[0026] The lower end of the carburetor body 1 is provided with an intake chamber 4, in which a rocker arm 5 is rotatably mounted. The inlet end of the main air passage 3 is located in the intake chamber 4, and external combustion gas enters the intake chamber 4 through an intake passage 8 (opened in the inner wall of the intake chamber 4) and an intake pipe joint 9.

[0027] A circular rubber blocking block 6 is provided at one end of the rocker arm 5, and the other end is fixedly connected to the shift fork 13. A return spring 7 is provided between the inner wall of the intake chamber 4 and the rocker arm 5. Under normal conditions, the return spring 7 pushes the rocker arm 5, causing the blocking block 6 to block the outlet end of the intake passage 8 (i.e., preventing gas from entering the intake chamber 4).

[0028] The lower opening of the intake chamber 4 is sealed by a rubber diaphragm 10. The middle of the diaphragm 10 is fixedly connected to a rod 11. Washers are respectively provided at the upper and lower ends of the middle portion of the diaphragm 10. The washers are sleeved onto the rod 11. The rod 11 defines an annular slot 12. The fork 13 of the rocker arm 5 is inserted into the slot 12. An O-ring 18 is also provided in the slot 12 to prevent the fork 13 from fitting too loosely with the slot 12, which could over-actuate the linkage between the diaphragm 10 and the rocker arm 5. The cross-section of the annular edge of the diaphragm 10 is an inwardly curved arc (consistent with the deformation direction of the diaphragm 10 when it expands under negative pressure), improving the smoothness of the movement.

[0029] A rotating shaft 14 is provided in the middle of the rocker arm 5, and a rotating groove 15 is provided above the inner wall of the air intake chamber 4. After the rotating shaft 14 is placed in the rotating groove 15, it is screwed and fixed by a screw 16 (the nut part of the screw 16 is placed at the opening of the rotating groove 15), limiting the position of the rotating shaft 14 and ensuring that the rocker arm 5 can only rotate around the rotating shaft 14.

[0030] An annular valve sleeve 17 is plugged at the outlet of the air inlet channel 8. The inner diameter of the center hole of the valve sleeve 17 is smaller than the size of the sealing block 6 (for example, the diameter of the sealing block 6 is 20 mm, and the inner diameter of the center hole of the valve sleeve 17 is 18 mm). When the sealing block 6 blocks the valve sleeve 17, the central axes of the two are aligned to ensure the sealing effect.

[0031] How it works

[0032] After the engine starts, negative pressure is generated in the carburetor body 1 (due to the low pressure area formed by the accelerated air flow at the throat 2). This negative pressure is transmitted to the intake chamber 4, pushing the diaphragm 10 to bulge upward (expand outward). The upward movement of the diaphragm 10 drives the plunger 11 to move upward synchronously. The plunger 11 pushes the rocker arm 5 to rotate counterclockwise around the rotation axis 14 (by Figure 2 Taking the rocker arm 5 as an example), one end of the rocker arm 5 is lifted, the blocking block 6 is separated from the valve sleeve 17, the air intake passage 8 is opened, and the gas enters the air intake chamber 4 through the air intake passage 8.

[0033] As gas continues to enter, the pressure in intake chamber 4 gradually increases, causing diaphragm 10 to expand outward (concave downward) under pressure, and rod 11 to move downward. This, in turn, drives rocker plate 5 to rotate clockwise via shift fork 13, causing blocking block 6 to gradually approach and ultimately block the center hole of valve sleeve 17. When the pressure in intake chamber 4 becomes too high, rod 11 moves downward further, completely blocking valve sleeve 17 and preventing gas from entering, thus achieving upper pressure control.

[0034] When the air pressure in the air intake chamber 4 decreases due to gas consumption, the diaphragm 10 retracts (bulges upward), the plug rod 11 moves upward, the rocker arm 5 rotates counterclockwise, the blocking block 6 separates from the valve sleeve 17, and the gas enters the air intake chamber 4 again until the air pressure returns to stability.

[0035] Through the above process, the air pressure in the intake chamber 4 is dynamically adjusted to a stable range, ensuring the uniformity of the mixing of gas and air at the throat 2, thereby improving the combustion efficiency and operating stability of the engine.

[0036] In summary, the utility model solves the problems of complex structure and unstable gas pressure of traditional gas carburetors by integrating a decompression structure into the carburetors body. It is applicable to a variety of gas fuels and has significant technical advantages and application value.

Claims

1. A multi-fuel pressure reducing valve integrated with a carburetor, used for mixed atomization of multiple fuels such as liquefied petroleum gas and liquefied natural gas, characterized by: The invention comprises a carburetor body (1), wherein the carburetor body (1) is provided with a throat (2) and a main air passage (3) leading to the throat (2); an air intake chamber (4) is provided at the lower end of the carburetor body (1), wherein a rocker arm (5) is rotatably mounted in the air intake chamber (4); an inlet end of the main air passage (3) is provided in the air intake chamber (4), an air intake passage (8) is provided on the inner wall of the air intake chamber (4), and the air intake passage (8) is externally connected to an air intake pipe joint (9); A blocking block (6) is provided at one end of the rocker arm rocker (5), and a return spring (7) is provided between the rocker arm rocker (5) and the inner wall of the air intake chamber (4). The return spring (7) is used to drive the rocker arm rocker (5) so that the blocking block (6) blocks the outlet end of the air intake channel (8); The lower opening of the air inlet cavity (4) is blocked by a diaphragm (10) made of rubber material, and a plug rod (11) is fixedly connected to the middle of the diaphragm (10), and an annular slot (12) is provided on the plug rod (11); a shift fork (13) is provided at the other end of the rocker arm (5), and the shift fork (13) is inserted into the slot (12) and is transmission-connected thereto; The cross section of the annular edge of the diaphragm (10) is an arc shape that bends inwards; a rotating shaft (14) is provided in the middle of the rocker arm (5); a rotating groove (15) for receiving the rotating shaft (14) is provided above the inner wall of the air inlet cavity (4); the opening edge of the rotating groove (15) is screwed and fixed by a screw (16) so that the rotating shaft (14) is locked in the rotating groove (15); An annular valve sleeve (17) is plugged at the outlet of the air inlet channel (8), and the inner diameter of the center hole of the valve sleeve (17) is smaller than the size of the blocking block (6); the blocking block (6) is a circular rubber plate, and when the blocking block (6) blocks the valve sleeve (17), the center axis of the valve sleeve (17) is aligned with the center axis of the blocking block (6).

2. The multi-fuel pressure reducing valve integrated carburetor according to claim 1, characterized in that: The arc-shaped bending direction of the annular edge of the diaphragm (10) is consistent with the deformation direction of the diaphragm (10) when it expands under negative pressure.

3. The multi-fuel pressure reducing valve integrated carburetor according to claim 1, characterized in that: The connection portion between the rocker arm rocker plate (5) and the rotary shaft (14) is rotationally matched, and the diameter of the rotary shaft (14) is adapted to the width of the rotary slot (15).

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