Sealed spark plug of gas generator set

Abstract

A sealed spark plug for a gas generator set relates to a spark plug, and aims to solve the problems that the conventional spark plug is poor in leakproofness and is easy to cause safety accidents. A limiting ring body is arranged in an upper shell; the lower shell is in threaded connection with the upper shell; the fire maker is in close contact with the limiting ring body; a high-voltage connecting wire of the fire maker is led out from the side wall of the lower shell; one end of the conducting rod and an electrode of the fire maker are fixed together in a butt joint manner; the sealing cover is in threaded connection with the other end of the upper shell; the other end of the conducting rod is electrically connected with one end of the connecting wire, one end of the connecting wire penetrates through the sealing cover, and the insulating outer wall of the connecting wire is in close contact with the sealing cover; the sealing plug is electrically connected with the other end of the connecting wire; and the sealing plug is sealed in a combustion chamber of the gas generator set. The spark plug has the beneficial effects that the spark plug is good in leakproofness, the possibility of fire or explosion accidents is reduced, and safe and stable operation of equipment is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a spark plug. BACKGROUND

[0002] Gas generator set is a kind of equipment using gas (main component is methane) as fuel to generate electricity;Spark plug plays a key role in gas generator set, the main function of spark plug is to introduce the pulse high-voltage electricity generated by ignition coil into combustion chamber, and use the electric spark generated by electrode to ignite the combustible mixture of compressed gas and air;When the piston is located at the position of the nearest point of compression stroke, spark plug generates electric spark, ignites the combustible mixture, makes it burn and releases a large amount of heat energy, so that the temperature and pressure of gas in cylinder are sharply increased;The existing spark plug is installed on cylinder cover, located at the top central position of combustion chamber, if the sealing effect of spark plug is poor, it may cause gas leakage or cause the electrode of spark plug to contact with the oil on cylinder cover;Gas leakage not only reduces power generation efficiency, but also may cause explosion when encountering open flame;Gas leakage may cause gas to accumulate around generator set, once encountering spark or high temperature, it may cause fire or explosion accident;The electrode of spark plug contacting with the oil on cylinder cover may ignite the oil on cylinder cover, which also may cause fire or explosion accident. SUMMARY

[0003] The utility model aims at solving the problems of poor sealing of existing spark plug and easy to cause safety accidents, and provides a sealed spark plug for gas generator set.

[0004] The sealed spark plug for gas generator set disclosed by the utility model comprises an upper shell, a lower shell, a sealing cover, a sealing plug, a lighter and a conductive rod.

[0005] The upper shell is a columnar structure with two open ends;And a limiting ring body is arranged in one end of the upper shell, and the limiting ring body and the upper shell are an integral structure.

[0006] The lower shell is a columnar structure with one open end;And the open end of the lower shell is threadedly connected with one end of the upper shell.

[0007] The lighter is arranged on the inner wall of the limiting ring body, and the outer wall of the lighter is in close contact with the inner wall of the limiting ring body;The high-voltage connecting wire of the lighter is led out from the side wall of the lower shell.

[0008] One end of the conductive rod is fixed with the electrode of the lighter in a butt joint manner.

[0009] The sealing cover is threadedly connected with the other end of the upper shell.

[0010] The other end of the conductive rod is electrically connected with one end of the connecting wire, wherein the one end of the connecting wire is penetrated by the sealing cover, and the insulating outer wall of the connecting wire is in close contact with the sealing cover.

[0011] The sealing plug is electrically connected with the other end of the connecting wire; and the sealing plug is sealed in the combustion chamber of the gas generator set.

[0012] Further, the insulating tube is further included.

[0013] The insulating tube is nested outside the conductive rod and outside the electrode of the igniter.

[0014] Further, the fixing joint is further included.

[0015] The fixing joint is fixed at the closed end of the lower shell, and the fixing joint is provided with external threads.

[0016] Further, the side wall of the lower shell is provided with the wire hole.

[0017] The high-voltage connecting wire of the igniter is led out of the wire hole of the lower shell.

[0018] Further, the wire hole is arc-rectangular, and the number of the wire holes is two.

[0019] The two arc-rectangular wire holes are oppositely arranged.

[0020] Further, the sealing gasket is arranged between the outer wall of the igniter and the inner wall of the upper shell.

[0021] Compared with the prior art, the utility model has the following beneficial effects: the upper shell, the limiting ring body in the upper shell, the igniter and the sealing cover constitute a closed cavity, the electric spark generated by the electrode of the igniter is led out by the conductive rod and the connecting wire, and finally the sealing plug is arranged in the combustion chamber of the gas generator set as an electric spark carrier to complete the ignition work, the airtightness of the spark plug is ensured, the gas or the machine oil is prevented from entering the closed cavity, the gas generator set sealing spark plug is arranged in a safe area far away from the cylinder and the combustion chamber by arranging the connecting wire, so that the gas leakage is avoided, the high-voltage wire for supplying power to the igniter is far away from the machine oil, the possibility of causing fire or explosion accidents is reduced, and the safe and stable operation of the equipment is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 A three-dimensional structure schematic view of a sealing spark plug of a gas generator set according to the first embodiment is shown in the figure.

[0023] Fig. 2Figure 2 is a schematic diagram of the internal structure of a sealed spark plug of a gas generator set according to the first embodiment after the upper shell and the lower shell are cut along the central axis.

[0024] Wherein, 1 is the upper shell; 2 is the lower shell; 3 is the fixed joint; 4 is the sealing cover; 5 is the connecting wire; 6 is the sealing plug; 7 is the wiring hole; 8 is the igniter; 9 is the conductive rod; 10 is the insulating tube. DETAILED DESCRIPTION

[0025] DETAILED DESCRIPTION Figs. 1-2 According to the first embodiment, the sealed spark plug of the gas generator set comprises an upper shell 1, a lower shell 2, a sealing cover 4, a sealing plug 6, an igniter 8 and a conductive rod 9.

[0026] The upper shell 1 is a columnar structure with both ends open; and an internal limiting ring body is arranged at one end of the upper shell 1, and the limiting ring body is an integral structure with the upper shell 1.

[0027] The lower shell 2 is a columnar structure with one end open; and the open end of the lower shell 2 is threadedly connected with one end of the upper shell 1.

[0028] The igniter 8 is arranged on the limiting ring body; and the outer wall of the igniter 8 is in close contact with the inner wall of the limiting ring body; and the high-voltage connecting line of the igniter 8 is led out from the side wall of the lower shell 2.

[0029] One end of the conductive rod 9 is fixed to the electrode of the igniter 8 in a butt joint manner.

[0030] The sealing cover 4 is threadedly connected with the other end of the upper shell 1.

[0031] The other end of the conductive rod 9 is electrically connected with one end of the connecting wire 5, wherein one end of the connecting wire 5 is inserted through the sealing cover 4, and the insulating outer wall of the connecting wire 5 is in close contact with the sealing cover 4.

[0032] The sealing plug 6 is electrically connected with the other end of the connecting wire 5; and the sealing plug 6 is sealed in the combustion chamber of the gas generator set.

[0033] In the embodiment, the working principle of the igniter 8 is as follows: the high-voltage connecting line end of the igniter 8 is connected with the pulse high-voltage, and the electrode of the igniter 8 is two, one is the center electrode, and the other is the side electrode; under the action of the high-voltage, the air between the center electrode and the side electrode of the igniter 8 is rapidly ionized to form positively charged ions and negatively charged free electrons; when the voltage between the two electrodes reaches a certain value, the number of ions and electrons in the gas increases like an avalanche, so that the air loses its insulating property, and a discharge channel is formed between the two electrodes, resulting in a "breakdown" phenomenon; after the breakdown phenomenon occurs, the gas forms a luminous body, i.e. "electric spark".

[0034] In the embodiment, the closed cavity is formed by the upper shell 1, the limiting ring body inside the upper shell, the igniter 8 and the sealing cover 4, the electric spark generated by the electrode of the igniter 8 is guided out by the conductive rod 9 and the connecting wire 5, and finally the sealing plug 6 is arranged in the combustion chamber of the gas generator set as the electric spark carrier to complete the ignition work, so that the sealing property of the spark plug is ensured, the gas or oil is prevented from entering the closed cavity, the gas leakage is avoided, the high-voltage wire for supplying power to the igniter is far away from the oil, the possibility of causing fire or explosion accidents is reduced, and the safe and stable operation of the equipment is ensured. The upper shell 1 and the lower shell 2 are in a cylindrical structure, and the outer walls of the upper shell 1 and the lower shell 2 are provided with anti-skid insulation nets, one end of the conductive rod 9 is provided with a groove, and the electrode of the igniter 8 is directly inserted into the groove, and a 6-thick-wall steel pipe is selected as the manufacturing material of the upper shell 1 and the lower shell 2, so that a tight sealing surface between the spark plug and the cylinder cover can be formed, and the leakage of the cylinder gas is effectively prevented.

[0035] Specific embodiment two, the embodiment is a further limitation of the gas generator set sealing spark plug described in the specific embodiment one, in the embodiment, further comprising an insulating tube 10.

[0036] The insulating tube 10 is nested outside the conductive rod 9 and outside the electrode of the igniter 8.

[0037] In the embodiment, the setting of the insulating tube 10 increases the insulation of the electrode of the conductive rod 9 and the igniter 8, which is equivalent to adding an insulating layer inside the closed cavity formed by the upper shell 1, the igniter 8 and the sealing cover 4.

[0038] Specific embodiment three, the embodiment is a further limitation of the gas generator set sealing spark plug described in the specific embodiment one, in the embodiment, further comprising a fixed joint 3.

[0039] The fixed joint 3 is fixed to the closed end of the lower shell 2, and the fixed joint 3 is provided with external threads.

[0040] In the embodiment, the recess is arranged on the outer wall of the lower shell 2, the recess is used for clamping a wrench, the fixed joint 3 is fixed in the safe area by selecting the wrench to tighten the fixed joint 3, the setting of the fixed joint 3 facilitates the fixation of the gas generator set sealing spark plug, and the fixed position of the fixed joint 3 is not limited by the cylinder or the combustion chamber.

[0041] Specific embodiment four, the embodiment is described in a kind of sealing spark plug of gas generating set of specific embodiment one, in the embodiment, the side wall of the lower shell 2 is opened with wiring hole 7;

[0042] The high-voltage connecting line of the lighter 8 is led out by the wiring hole 7 of the lower shell 2.

[0043] In the embodiment, by increasing the wiring hole 7, the high-voltage connecting line end of the lighter 8 is connected with the power supply high-voltage line, and the connection speed can be increased, and the high-voltage line can be quickly assembled and disassembled.

[0044] Specific embodiment five, the embodiment is described in a kind of sealing spark plug of gas generating set of specific embodiment four, in the embodiment, the wiring hole 7 is arc rectangular, and the number of wiring hole 7 is two;

[0045] Two arc rectangular wiring holes 7 are oppositely arranged.

[0046] In the embodiment, the arc rectangular wiring hole 7 has no sharp outer edge, which can avoid damage to the external high-voltage line, and the two arc rectangular wiring holes 7 are oppositely arranged, which is more convenient for wiring.

[0047] Specific embodiment six, the embodiment is described in a kind of sealing spark plug of gas generating set of specific embodiment one, in the embodiment, the outer wall of the lighter 8 and the inner wall of the upper shell 1 are provided with sealing pad.

[0048] In the embodiment, the sealing pad is arranged to increase the air tightness of the closed cavity formed by the upper shell 1, the lighter 8 and the sealing cover 4; It avoids that the external material enters the lighter 8 point working area, and increases the safety of stable operation of the equipment.

[0049] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A sealed spark plug for gas engine units, characterized in that, The utility model relates to a gas generator set ignition device, which comprises an upper shell (1), a lower shell (2), a sealing cover (4), a sealing plug (6), an igniter (8) and a conductive rod (9). The upper shell (1) is a columnar structure with open ends; and a limiting ring body is arranged inside one end of the upper shell (1), and the limiting ring body is an integral structure with the upper shell (1). The lower shell (2) is a columnar structure with an open end; and the open end of the lower shell (2) is threadedly connected with one end of the upper shell (1). The igniter (8) is arranged on the inner wall of the limiting ring body; and the outer wall of the igniter (8) is in close contact with the inner wall of the limiting ring body; and the high-voltage connecting wire of the igniter (8) is led out from the side wall of the lower shell (2). One end of the conductive rod (9) is fixed to the electrode of the igniter (8) in a butt joint manner. The sealing cover (4) is threadedly connected with the other end of the upper shell (1). The other end of the conductive rod (9) is electrically connected with one end of the connecting wire (5), wherein the one end of the connecting wire (5) is inserted into the sealing cover (4), and the insulating outer wall of the connecting wire (5) is in close contact with the sealing cover (4). The sealing plug (6) is electrically connected with the other end of the connecting wire (5); and the sealing plug (6) is sealed in the combustion chamber of the gas generator set.

2. A sealed spark plug for gas engine sets according to claim 1, characterized in that Further comprising an insulating tube (10). The insulating tube (10) is nested outside the conductive rod (9) and outside the electrode of the igniter (8).

3. The sealed spark plug for gas engine set according to claim 1, wherein Further comprising a fixing connector (3). The fixing connector (3) is fixed to the closed end of the lower shell (2), and the fixing connector (3) is provided with external threads.

4. The sealed spark plug for gas engine set according to claim 1, wherein The side wall of the lower shell (2) is provided with wire holes (7). The high-voltage connecting wire of the igniter (8) is led out from the wire holes (7) of the lower shell (2).

5. A sealed spark plug for gas engine sets according to claim 4, characterized in that The wire holes (7) are arc-rectangular, and the number of the wire holes (7) is two. The two arc-rectangular wire holes (7) are oppositely arranged.

6. The sealed spark plug for gas engine set according to claim 1, wherein A sealing gasket is arranged between the outer wall of the igniter (8) and the inner wall of the upper shell (1).

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