Ignition structure of combustion chamber of large-cylinder-diameter low-heating-value gas engine

Abstract

The invention discloses a large-cylinder-diameter low-heating-value gas engine combustion chamber ignition structure, and particularly relates to the technical field of gas engines, the large-cylinder-diameter low-heating-value gas engine combustion chamber ignition structure comprises a cylinder cover, jacket fixing screw holes are symmetrically formed in the middle of the upper end of the cylinder cover front and back, a first threaded hole is formed in the middle of an inner cavity of the cylinder cover, and an ignition mechanism is arranged in an inner cavity of the first threaded hole; an assembly set is arranged on the left portion of the upper side of the ignition mechanism. The auxiliary combustion chamber is formed by the ignition head body, the fire insulation sleeve and the fire-jet head, combustible gas is pushed into the auxiliary combustion chamber and ignited through the upward stroke of the piston, generated flame thrust is matched with the fire-jet head at the bottom of the auxiliary combustion chamber to evenly enter the main combustion chamber, and the combustible gas in the main combustion chamber is rapidly ignited to do work; combustible gas in the cylinder can be fully combusted to the maximum extent, the power of the engine is improved at the fastest combustion speed, the purpose of good economic performance is achieved, and meanwhile the effects of energy conservation, emission reduction, low carbon and environmental protection are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas engines, and particularly relates to a combustion chamber ignition structure for a large-bore low-calorific-value gas engine. Background Art

[0002] At present, there are two applications of domestic gas units. One is an internal-mixing gas engine, and the other is an external-mixing gas engine. They are two different intake methods. One is that the internal-mixing gas engine uses the piston's downward stroke to allow gas and air to enter the cylinder separately for mixing. When the piston reaches the end of its upward stroke, it is ignited by a spark plug to perform work and achieve power output. The other is that the external-mixing gas engine first mixes gas and air by a mixer outside the cylinder, and finally the premixed gas enters the cylinder. When the piston moves upward to the end point, it is ignited by a spark plug to perform work and achieve power output.

[0003] Since these two types of mixed gas engines directly use a spark plug to ignite and perform work, the combustion speed of the combustible gas in the cylinder is slow, indirectly resulting in the engine being unable to maximize its performance, causing problems such as low engine power and high exhaust temperature. Summary of the Invention

[0004] The main purpose of the present invention is to provide a combustion chamber ignition structure for a large-bore low-calorific-value gas engine, which can effectively solve the problem that the slow combustion speed of the combustible gas indirectly leads to the engine being unable to maximize its performance, resulting in low engine power and high exhaust temperature.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A combustion chamber ignition structure for a large-bore low-calorific-value gas engine, including a cylinder head. A pair of symmetrically arranged outer sleeve fixing screw holes are opened in the middle of the upper end of the cylinder head. The inner cavities of both outer sleeve fixing screw holes are threadedly connected with fastening screws. A threaded hole 1 is opened in the middle of the inner cavity of the cylinder head, and an ignition mechanism is arranged in the inner cavity of the threaded hole 1. A total assembly group is arranged on the left side of the upper part of the ignition mechanism.

[0006] Preferably, the ignition mechanism includes an outer combustion chamber sleeve. A pair of symmetrically arranged counterbores 1 are opened at the upper end of the outer combustion chamber sleeve. An ignition head upper sleeve is arranged in the inner cavity of the outer combustion chamber sleeve and the inner cavities of both counterbores 1. An external thread 1 is arranged in the middle of the outer surface of the outer combustion chamber sleeve. An ignition head body is slidably connected in the middle of the inner cavity of the outer combustion chamber sleeve. A fire separation sleeve is slidably connected in the middle of the inner cavity of the outer combustion chamber sleeve, and the ignition head body is located directly below the fire separation sleeve. A flame spraying head is slidably connected to the lower side of the inner cavity of the outer combustion chamber sleeve, and the flame spraying head is located directly below the fire separation sleeve.

[0007] Preferably, the outer surface of the external thread 1 is threadedly connected with the threaded hole 1.

[0008] Preferably, the ignition head sleeve includes an ignition head sleeve body. A through hole that is symmetrical in the front and back is provided at the upper end of the ignition head sleeve body. Sunken hole columns are fixedly connected to both the front and back sides of the lower end of the ignition head sleeve body in the horizontal direction. A second threaded hole is provided at the left end of the ignition head sleeve body.

[0009] Preferably, the lower side of the outer surface of the ignition head sleeve is slidably connected to the inner cavity of the combustion chamber outer sleeve. The outer surfaces of the two sunken hole columns are respectively slidably connected to the two sunken holes one. The outer surfaces of the two fastening screws respectively penetrate the inner cavities of the two through holes.

[0010] Preferably, the assembly group includes a one-way valve outer sleeve. A lower guide column is slidably connected to the right side of the inner cavity of the one-way valve outer sleeve. Sealing beads are respectively slidably connected to the middle part of the inner cavity of the one-way valve outer sleeve. An upper guide column is slidably connected to the left side of the inner cavity of the one-way valve outer sleeve. An external thread two is provided on the right side of the outer surface of the one-way valve outer sleeve. A threaded hole three is provided on the left side of the inner cavity of the one-way valve outer sleeve. A compression nut is engaged and connected to the inner cavity of the threaded hole three.

[0011] Preferably, the outer surface of the external thread two is engaged and connected to the inner cavity of the second threaded hole.

[0012] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, a secondary combustion chamber is formed by the ignition head body, the fire separation sleeve and the flame ejection head. And the cylinder is filled with well-mixed combustible gas. When using the upward stroke of the piston, the combustible gas is pushed into the secondary combustion chamber, and the combustible gas in the secondary combustion chamber is ignited by the spark plug in the secondary combustion chamber. Through the flame thrust generated by igniting the combustible gas in the secondary combustion chamber, cooperating with the flame ejection head at the bottom of the secondary combustion chamber to enter the main combustion chamber, the combustible gas in the main combustion chamber is quickly ignited to perform work. It can maximize the full combustion of the combustible gas in the cylinder and achieve the power improvement of the engine at the fastest combustion speed, achieving the purpose of good economic performance while also playing a role in energy conservation, emission reduction and low-carbon environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a cross-sectional view of the overall structure of the present invention; Figure 3 is a schematic diagram of the ignition mechanism of the present invention; Figure 4 is a schematic diagram of the upper sleeve of the ignition head of the present invention; Figure 5 is a schematic diagram of the assembly group of the present invention; Figure 6 is another perspective schematic diagram of the assembly group of the present invention.

[0014] In the figure: 1. Cylinder head; 2. Ignition mechanism; 21. Combustion chamber outer sleeve; 22. Ignition head body; 23. Fire separation sleeve; 24. Flame jet head; 25. First external thread; 26. First counterbore; 27. Upper sleeve of ignition head; 271. Sleeve body of ignition head; 272. Through hole; 273. Counterbore column; 274. Second threaded hole; 3. Assembly group; 31. Outer sleeve of check valve; 32. Third threaded hole; 33. Compression nut; 34. Upper guide post; 35. Sealing bead; 36. Lower guide post; 38. Second external thread; 4. Fastening screw; 5. Outer sleeve fixing screw hole; 6. First threaded hole. Specific embodiments

[0015] To make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0016] Example 1, as Figure 1-2 shown, a combustion chamber ignition structure for a large-bore low calorific value gas engine includes a cylinder head 1. In the middle of the upper end of the cylinder head 1, there are symmetrically arranged front and rear outer sleeve fixing screw holes 5. The inner cavities of the two outer sleeve fixing screw holes 5 are both meshed and connected with fastening screws 4. In the middle of the inner cavity of the cylinder head 1, there is a first threaded hole 6. In the inner cavity of the first threaded hole 6, there is an ignition mechanism 2. On the upper left side of the ignition mechanism 2, there is an assembly group 3.

[0017] First, the ignition mechanism 2 is installed through the first threaded hole 6. Then, the ignition mechanism 2 is fixed through the cooperation of the fastening screw 4 and the outer sleeve fixing screw hole 5. The ignition mechanism 2 is used to connect the assembly group 3, so that the ignition mechanism 2 and the assembly group 3 are fixedly installed on the cylinder head 1, completing the installation of the entire device. The mutual cooperation realizes that the gas engine increases the compression volume in the cylinder while keeping the original compression ratio unchanged and burns more quickly, achieving the purpose of improving the engine power, thereby generating higher economic benefits.

[0018] Further explanation, as Figure 3 shown, the ignition mechanism 2 includes a combustion chamber outer sleeve 21. At the upper end of the combustion chamber outer sleeve 21, there are symmetrically arranged front and rear first counterbores 26. In the inner cavity of the combustion chamber outer sleeve 21 and the inner cavities of the two first counterbores 26, there is an upper sleeve of ignition head 27. In the middle of the outer surface of the combustion chamber outer sleeve 21, there is a first external thread 25. In the middle of the inner cavity of the combustion chamber outer sleeve 21, there is a slidably connected ignition head body 22. In the middle of the inner cavity of the combustion chamber outer sleeve 21, there is a slidably connected fire separation sleeve 23, and the ignition head body 22 is located directly below the fire separation sleeve 23. In the lower side of the inner cavity of the combustion chamber outer sleeve 21, there is a slidably connected flame jet head 24, and the flame jet head 24 is located directly below the fire separation sleeve 23. The outer surface of the first external thread 25 is meshed and connected with the first threaded hole 6.

[0019] It should be noted that a sealing sleeve is installed between the lower side of the inner cavity of the combustion chamber jacket 21 and the flame nozzle 24. Then, the fire separation sleeve 23 is installed in the middle of the inner cavity of the combustion chamber jacket 21, that is, above the flame nozzle 24 and below the outer surface of the ignition head body 22. Then, the upper sleeve 27 of the ignition head is installed through the first counterbore 26. Then, through the fastening screw 4, the outer sleeve fixing screw hole 5, the first external thread 25, and the first threaded hole 6, finally, the ignition mechanism 2 is installed on the cylinder head 1. The secondary combustion chamber formed by the ignition head body 22, the fire separation sleeve 23, and the flame nozzle 24 has a water cavity formed between the outer wall of the secondary combustion chamber and the cylinder head 1. The cylinder head 1 itself has cooling circulating water. The bottom of the secondary combustion chamber is connected to the main combustion chamber by the flame nozzle 24. The flame generated by the work of the secondary combustion chamber is sprayed into the main combustion chamber cylinder through the diversion holes of the flame nozzle 24 of the secondary combustion chamber for rapid ignition and work. Part of the heat generated by the work is cooled by the circulating water in the water cavity formed between the secondary combustion chamber and the cylinder head 1. Part of it is when the engine is working and the intake is in progress, the assembly group 3 is opened, and the supercharged air enters the secondary combustion chamber for cooling. A spark plug installation hole is provided in the upper body of the ignition head body 22 of the secondary combustion chamber, and the spark plug electrode is installed in the upper body of the secondary combustion chamber. The upper body of the secondary combustion chamber uses threads and gaskets for better sealing, which is convenient for maintenance and disassembly.

[0020] Further, as Figure 4 shown, the upper sleeve 27 of the ignition head includes an ignition head sleeve body 271. Through holes 272 that are symmetrically arranged front and back are opened at the upper end of the ignition head sleeve body 271. At both front and back sides of the lower end of the ignition head sleeve body 271 in the horizontal direction, counterbore columns 273 are fixedly connected. A second threaded hole 274 is opened at the left end of the ignition head sleeve body 271. The outer surface of the lower side of the ignition head sleeve body 271 is slidably connected to the inner cavity of the combustion chamber jacket 21. The outer surfaces of the two counterbore columns 273 are respectively slidably connected to the two first counterbores 26. The outer surfaces of the two fastening screws 4 respectively penetrate through the inner cavities of the two through holes 272.

[0021] Specifically, the counterbore columns 273 and the opened through holes 272 are convenient for cooperating with the first counterbore 26. Finally, the fastening screw 4 passes through the inner cavities of the through hole 272 and the first counterbore 26 and is meshed and connected with the outer sleeve fixing screw hole 5, so that the ignition mechanism 2 is installed and fixed on the cylinder head 1. The assembly group 3 is installed through the opened second threaded hole 274.

[0022] Embodiment 2 is completed on the basis of Embodiment 1 for the cooperative use with the ignition mechanism 2, as Figure 5 and 6As shown, the assembly group 3 includes a check valve housing 31. A lower guide post 36 is slidably connected to the right side of the inner cavity of the check valve housing 31. Sealing beads 35 are respectively slidably connected to the middle part of the inner cavity of the check valve housing 31. An upper guide post 34 is slidably connected to the left side of the inner cavity of the check valve housing 31. An external thread two 38 is provided on the right side of the outer surface of the check valve housing 31. A threaded hole three 32 is provided in the left side of the inner cavity of the check valve housing 31. A compression nut 33 is meshed and connected to the inner cavity of the threaded hole three 32. The outer surface of the external thread two 38 is meshed and connected to the inner cavity of the threaded hole two 274.

[0023] First, the lower guide post 36 is first installed by the check valve housing 31, then the sealing beads 35 are put in, and then the upper guide post 34 is installed. The compression nut 33 is meshed and connected with the threaded hole three 32 to be fastened to form a check valve assembly, that is, the assembly group 3. An external thread two 38 is provided on the outer surface of the check valve housing 31. Through the meshing connection of the external thread two 38 and the threaded hole two 274, the assembly group 3 is installed with the upper sleeve 27 of the ignition head. The principle of the check valve is that when the piston moves downward, the intake valve opens. At this time, the cylinder is in an atmospheric intake state. It is the pressure of 300KPa that pushes the valve bead of the check valve to open and intake air into the auxiliary combustion chamber. The gas blows into the cylinder through the flame holes at the bottom of the auxiliary combustion chamber. At this time, it will carry some temperatures in the auxiliary combustion chamber. At the same time, the mixed combustible gas also enters the cylinder when the intake valve opens.

[0024] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A combustion chamber ignition structure for a large-bore low-calorific value gas engine, comprising a cylinder head (1), characterized in that: The cylinder head (1) is provided with a front-to-back symmetrical sleeve fixing screw hole (5) at the middle of the upper end, and the inner cavities of the two sleeve fixing screw holes (5) are both meshed and connected with fastening screws (4). The cylinder head (1) is provided with a threaded hole (6) at the middle of the inner cavity, and an ignition mechanism (2) is provided in the inner cavity of the threaded hole (6). The upper left portion of the ignition mechanism (2) is provided with an assembly group (3).

2. The ignition structure of a combustion chamber of a large-cylinder low-calorific value gas engine according to claim 1, characterized in that: The ignition mechanism (2) comprises a combustion chamber sleeve (21), the upper end of the combustion chamber sleeve (21) is provided with a front-to-back symmetrical countersunk hole (26), the inner cavity of the combustion chamber sleeve (21) and the inner cavities of the two countersunk holes (26) are provided with an ignition head sleeve (27), the middle part of the outer surface of the combustion chamber sleeve (21) is provided with an external thread (25), the middle part of the inner cavity of the combustion chamber sleeve (21) is slidably connected to an ignition head body (22), the middle part of the inner cavity of the combustion chamber sleeve (21) is slidably connected to a fireproof sleeve (23), and the ignition head body (22) is located directly below the fireproof sleeve (23), and the lower side of the inner cavity of the combustion chamber sleeve (21) is slidably connected to a flamethrower (24), and the flamethrower (24) is located directly below the fireproof sleeve (23).

3. The ignition structure of a combustion chamber of a large-cylinder low-calorific value gas engine according to claim 2, characterized in that: The outer surface of the external thread 1 (25) is meshedly connected with the threaded hole 1 (6).

4. The ignition structure of a combustion chamber of a large-cylinder low-calorific value gas engine according to claim 2, characterized in that: The ignition head cover (27) comprises an ignition head cover body (271), the upper end of the ignition head cover body (271) is provided with front-to-rear symmetrical through holes (272), the lower end of the ignition head cover body (271) in the horizontal direction is fixedly connected to the front and rear sides with countersunk columns (273), and the left end of the ignition head cover body (271) is provided with a second threaded hole (274).

5. The ignition structure of a combustion chamber of a large-cylinder low-calorific value gas engine according to claim 4, characterized in that: The lower side of the outer surface of the ignition head cover body (271) is slidably connected to the inner cavity of the combustion chamber outer cover (21), the outer surfaces of the two countersunk columns (273) are respectively slidably connected to the two countersunk holes (26), and the outer surfaces of the two fastening screws (4) respectively penetrate the inner cavities of the two through holes (272).

6. The ignition structure of a combustion chamber of a large-cylinder low-calorific value gas engine according to claim 4, characterized in that: The assembly group (3) comprises a one-way valve sleeve (31), a lower guide column (36) being slidably connected to the right side of the inner cavity of the one-way valve sleeve (31), a sealing bead (35) being slidably connected to the middle of the inner cavity of the one-way valve sleeve (31), an upper guide column (34) being slidably connected to the left side of the inner cavity of the one-way valve sleeve (31), an external thread second (38) being provided on the right side of the outer surface of the one-way valve sleeve (31), a threaded hole third (32) being provided on the left side of the inner cavity of the one-way valve sleeve (31), and a clamping nut (33) being meshedly connected to the inner cavity of the threaded hole third (32).

7. The ignition structure of a combustion chamber of a large-cylinder low-calorific value gas engine according to claim 6, characterized in that: The outer surface of the second external thread (38) is meshedly connected with the inner cavity of the second threaded hole (274).

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