Plasma igniter with protective structure

Abstract

The utility model discloses a plasma igniter with a protective structure. The utility model is applied in a combustor outer cylinder, and is characterized by comprising an ignition component, a first sleeve, a second sleeve, a gas inlet pipe, a gas outlet pipe and a gas outlet pipe, the cathode bar is coaxially arranged in the first sleeve in a penetrating manner; the anode ring is arranged at the extending end of the first sleeve; the power supply unit is arranged at the extending end of the first sleeve; the protection component comprises a second sleeve which is arranged in the combustor outer cylinder in a penetrating manner, and the second sleeve is arranged in an axial telescopic manner; the adjusting part is arranged between the second sleeve and the first sleeve; according to the utility model, the adjusting part controls the telescopic end of the second sleeve to contract so that the cathode bar and the anode ring extend out of the second sleeve, and after ignition is completed, the adjusting part controls the telescopic end of the second sleeve to extend out so that the cathode bar and the anode ring are retracted into the second sleeve, thereby preventing the cathode bar and the anode ring from being contacted with open fire; and the service lives of the cathode bar and the anode ring are ensured.

Description

Technical Field

[0001] This utility model relates to the field of plasma ignition technology, and in particular to a plasma igniter with a protective structure. Background Technology

[0002] A plasma igniter is an ignition device that can ignite fuel at a relatively low ignition temperature and accelerate chemical reactions and improve fuel combustion efficiency through the high temperature of plasma. It is commonly used in the power industry, petrochemical industry and other technical fields.

[0003] In actual operation, plasma igniters usually do not require continuous ignition for a long time, but their electrodes are exposed to a high-temperature combustion environment for a long time, making them susceptible to high-temperature oxidation, corrosion and carbon buildup, which leads to a shortened electrode life.

[0004] Therefore, a plasma igniter that can protect the electrodes after ignition is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings by providing a plasma igniter with a protective structure, thereby protecting the electrodes after ignition.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a plasma igniter with a protective structure is applied inside the outer cylinder of a burner, characterized in that it includes: an ignition component, including a first sleeve, which is inserted through the axial inner side of the outer cylinder of the burner;

[0007] The cathode rod is coaxially inserted inside the first sleeve;

[0008] An anode ring is disposed at the insertion end of the first sleeve and coaxially sleeved around the cathode rod;

[0009] A power supply unit is located at the extended end of the first sleeve and electrically connected to the cathode rod;

[0010] The protective component includes a second sleeve, which is inserted into the outer cylinder of the burner and coaxially sleeved around the outer periphery of the first sleeve, and the second sleeve is telescopically arranged along its axial direction, with an opening at the top of its telescopic end;

[0011] An adjusting component is disposed between the second sleeve and the first sleeve, and is used to drive the telescopic end of the second sleeve to reciprocate along the axial direction.

[0012] Furthermore, a rack is provided on the telescopic end of the first sleeve;

[0013] The adjusting component includes a gear disposed inside the outer cylinder of the burner and meshing with the rack, a power unit is also provided on one side of the outer cylinder of the burner, and a transmission rod for connecting the power unit and the gear is provided between the power unit and the gear.

[0014] Furthermore, a first flow channel is provided inside the telescopic end of the second sleeve, and the first flow channel is spirally arranged at one end near the air outlet of the burner outer cylinder.

[0015] The second sleeve is provided with a cooling component, including a water supply pipe and a water return pipe. The water supply pipe and the water return pipe are respectively arranged in the fixed end of the second sleeve, and the water supply pipe is slidably engaged with the water inlet end of the first flow channel, and the water return pipe is slidably engaged with the water outlet end of the first flow channel.

[0016] The second sleeve has an inlet and an outlet on its extended end. The inlet is connected to the water supply pipe and is used to supply cooling medium into the water supply pipe. The outlet is connected to the return water pipe.

[0017] Furthermore, a second flow channel and a third flow channel are respectively provided in the first sleeve and the cathode rod. The second flow channel is spirally arranged at one end near the anode ring, and the third flow channel is spirally arranged at the end near the cathode rod.

[0018] The inlets of the second flow channel and the third flow channel are respectively connected to the inlet, and their outlets are respectively connected to the outlet.

[0019] Furthermore, a baffle is rotatably provided at the opening of the telescopic end of the second sleeve.

[0020] The beneficial effects of this utility model are reflected in:

[0021] This invention, through the cooperation of the adjusting component and the protective component, when ignition is required, the adjusting component controls the retraction end of the second sleeve to retract, causing the cathode rod and anode ring to extend out of the second sleeve, so that the electric arc generated between the cathode rod and anode ring can contact the coal powder and ignite. After ignition is completed, the adjusting component controls the retraction end of the second sleeve to extend, causing the cathode rod and anode ring to retract into the second sleeve, so as to avoid the cathode rod and anode ring from contacting the open flame and to ensure the service life of the cathode rod and anode ring. Attached Figure Description

[0022] Figure 1 This is a perspective view of the plasma igniter with a protective structure described in this utility model;

[0023] Figure 2 This is a cross-sectional view of the plasma igniter with a protective structure described in this utility model;

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 for Figure 2 A magnified view of point B in the middle.

[0026] In the picture:

[0027] 01. Burner outer cylinder; 1. Ignition component; 11. First sleeve; 111. Second flow channel; 12. Cathode rod; 121. Third flow channel; 13. Anode ring; 14. Power supply unit; 2. Protection component; 21. Second sleeve; 211. Opening; 212. Rack; 213. First flow channel; 3. Adjustment component; 31. Gear; 32. Power unit; 33. Transmission rod; 4. Cooling component; 41. Water supply pipe; 42. Water return pipe; 43. Water inlet; 44. Water outlet; 5. Baffle. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0029] Please see Figure 1-4 This utility model discloses a plasma igniter with a protective structure, which is applied to the outer cylinder 01 of a burner and includes: an ignition component 1, including a first sleeve 11, which is inserted into the axial inner side of the outer cylinder 01 of the burner;

[0030] The cathode rod 12 is coaxially inserted inside the first sleeve 11;

[0031] The anode ring 13 is disposed at the insertion end of the first sleeve 11 and coaxially sleeved around the cathode rod 12, and is used to react with the cathode rod 12 to generate an electric arc;

[0032] The power supply unit 14 is located at the extended end of the first sleeve 11 and is electrically connected to the cathode rod 12;

[0033] The protective component 2 includes a second sleeve 21 for protecting the cathode rod 12 and the anode ring 13. The second sleeve 21 is inserted into the outer cylinder 01 of the burner and coaxially sleeved on the outer periphery of the first sleeve 11. The second sleeve 21 is telescopically arranged along its axial direction, and an opening 211 is provided at the top of its telescopic end.

[0034] Adjustment component 3 is installed inside the outer cylinder 01 of the burner and connected to the telescopic end of the second sleeve 21, and is used to drive the telescopic end of the second sleeve 21 to reciprocate along the axial direction.

[0035] In practice, when ignition is required, the adjusting component 3 will move the telescopic end of the second sleeve 21 towards the power supply unit 14 until the cathode rod 12 and anode ring 13 extend through the opening 211 into the second sleeve 21. At this time, the pulverized coal in the outer cylinder 01 of the burner can directly contact the cathode rod 12 and anode ring 13. The power supply unit 14 supplies power to the cathode rod 12, and the cathode rod 12 and anode ring 13 react and generate an electric arc. After the pulverized coal contacts the electric arc, it is ignited and ignition is completed. Then the power supply unit 14 stops supplying power, and the adjusting component 3 moves the telescopic end of the second sleeve 21 away from the power supply unit 14 until the cathode rod 12 and anode ring 13 are retracted into the second sleeve 21 again to avoid the cathode rod 12 and anode ring 13 from contacting the open flame.

[0036] In this invention, through the cooperation of the adjusting component 3 and the protective component 2, when ignition is required, the adjusting component 3 controls the retraction end of the second sleeve 21 to retract, causing the cathode rod 12 and the anode ring 13 to extend out of the second sleeve 21, so that the electric arc generated between the cathode rod 12 and the anode ring 13 can contact the coal powder and ignite. After ignition is completed, the adjusting component 3 controls the retraction end of the second sleeve 21 to extend, causing the cathode rod 12 and the anode ring 13 to retract into the second sleeve 21, so as to avoid the cathode rod 12 and the anode ring 13 from contacting the open flame and to ensure the service life of the cathode rod 12 and the anode ring 13.

[0037] Preferably, the power supply unit 14 can use existing technologies such as DC power supply or high-voltage pulse power supply.

[0038] It should be noted that the structure and function of the burner outer cylinder 01 are common knowledge to those skilled in the art, so they will not be described in detail here.

[0039] In one embodiment, a rack 212 is provided on the telescopic end of the second sleeve 21 along its axial direction;

[0040] The adjusting component 3 includes a gear 31 disposed inside the burner outer cylinder 01 and meshing with a rack 212. A power unit 32 is also provided on one side of the burner outer cylinder 01. A transmission rod 33 for connecting the power unit 32 and the gear 31 is also provided between the power unit 32 and the gear 31. The power unit 32 drives the gear 31 to rotate through the transmission rod 33.

[0041] With this design, when it is necessary to adjust the telescopic end of the second sleeve 21, the power unit 32 drives the gear 31 to rotate through the transmission rod 33. The gear 31 meshes with the rack 212, causing the telescopic end of the second sleeve 21 to move towards or away from the air outlet of the burner outer cylinder 01, thereby controlling the extension and retraction of the cathode rod 12 and the anode ring 13 into the second sleeve 21.

[0042] The preferred power unit 32 can be an electric motor from the prior art.

[0043] In one embodiment, a first flow channel 213 is provided inside the telescopic end of the second sleeve 21, and the first flow channel 213 is spirally arranged at one end near the air outlet of the burner outer cylinder 01.

[0044] The second sleeve 21 is provided with a cooling component 4, including a water supply pipe 41 and a return water pipe 42. The water supply pipe 41 and the return water pipe 42 are respectively arranged in the fixed end of the second sleeve 21. The water supply pipe 41 is slidably engaged with the water inlet end of the first flow channel 213, and the return water pipe 42 is slidably engaged with the water outlet end of the first flow channel 213. The water supply pipe 41 and the return water pipe 42 are dynamically sealed at their respective joints with the first flow channel 213.

[0045] The second sleeve 21 has an inlet 43 and an outlet 44 inserted into its extended end. The inlet 43 is connected to the water supply pipe 41, and the other end is connected to an external water supply component (not shown in the figure). The water supply component is used to supply insulating cooling medium into the water supply pipe 41 through the inlet 43. The outlet 44 is connected to the return water pipe 42.

[0046] With this design, when the pulverized coal inside the burner outer cylinder 01 is burning, the water supply component delivers the insulating cooling medium to the water supply pipe 41 through the water inlet 43. The spiral design of the first flow channel 213 allows the insulating cooling medium to exchange heat with the end of the second sleeve 21 closest to the open flame for a longer period of time. The insulating cooling medium after heat exchange is discharged through the water outlet 44. This not only prevents the temperature of the second sleeve 21 from getting too high, but also provides heat insulation for the cathode rod 12 and the anode ring 13, improving the protection effect. When the telescopic end of the second sleeve 21 moves, the water supply pipe 41 and the return water pipe 42 move relative to the first flow channel 213 and are telescopically installed inside it, so as not to interfere with the normal operation of the second sleeve 21.

[0047] Preferably, the insulating cooling medium can be insulating oil.

[0048] In one embodiment, a second flow channel 111 and a third flow channel 121 are respectively provided in the first sleeve 11 and the cathode rod 12. The second flow channel 111 is spirally arranged in the first sleeve 11 near the end of the anode ring 13, and the third flow channel 121 is spirally arranged near the end of the cathode rod 12.

[0049] The inlets of the second flow channel 111 and the third flow channel 121 are respectively connected to the inlet 43, and their outlets are respectively connected to the outlet 44. When the water conveying component transports the insulating cooling medium, the insulating cooling medium can enter each flow channel.

[0050] With this design, when the water conveying component transports the insulating cooling medium, the insulating cooling medium enters the first flow channel 213, the second flow channel 111, and the third flow channel 121 sequentially through the inlet 43. Since the anode ring 13 and the end of the cathode rod 12 are the main heat-generating parts, the spiral design of the second flow channel 111 and the third flow channel 121 enables the insulating cooling medium to exchange heat with the heat-generating parts of the corresponding electrodes for a longer period of time, thereby improving the heat exchange efficiency. After heat exchange, the insulating cooling medium is discharged from the second sleeve 21 through the outlet 44.

[0051] In one embodiment, a baffle 5 is rotatably provided at the opening 211 of the telescopic end of the second sleeve 21, and the baffle 5 is rotatably connected to the top of the telescopic end of the second sleeve 21. The baffle 5 is used to open or close the opening 211.

[0052] With this design, when the anode ring 13 extends out of the second sleeve 21, the first sleeve 11 contacts the baffle 5 and applies an upward rotating thrust to the baffle 5, opening 211. When the first sleeve 11 no longer contacts the baffle 5, the baffle 5 rotates downward under the action of gravity and closes the opening 211. At this time, the baffle 5 is used to prevent open flame from entering the second sleeve 21, thus improving the protection effect.

[0053] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0054] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0055] Additionally, "multiple" refers to two or more.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A plasma igniter with a protective structure, applied to the outer cylinder (01) of a burner, characterized in that, include: Ignition component (1) includes a first sleeve (11) which is inserted through the inner side of the outer cylinder (01) of the burner; The cathode rod (12) is coaxially inserted inside the first sleeve (11); An anode ring (13) is disposed at the insertion end of the first sleeve (11) and coaxially sleeved around the cathode rod (12); A power supply unit (14) is provided at the extended end of the first sleeve (11) and electrically connected to the cathode rod (12); The protective component (2) includes a second sleeve (21), which is inserted inside the outer cylinder (01) of the burner and coaxially sleeved on the outer periphery of the first sleeve (11), and the second sleeve (21) is extended and retracted along its axial direction, and an opening (211) is provided at the top of its extension end. An adjusting component (3) is disposed between the second sleeve (21) and the first sleeve (11) for driving the telescopic end of the second sleeve (21) to reciprocate along the axial direction.

2. The plasma igniter with a protective structure according to claim 1, characterized in that: A rack (212) is provided on the telescopic end of the first sleeve (11); The adjusting component (3) includes a gear (31) disposed inside the burner outer cylinder (01) and meshing with the rack (212). A power unit (32) is also provided on one side of the burner outer cylinder (01). A transmission rod (33) for connecting the power unit (32) and the gear (31) is also provided between the power unit (32) and the gear (31).

3. The plasma igniter with a protective structure according to claim 1, characterized in that: The second sleeve (21) has a first flow channel (213) inside its telescopic end, and the first flow channel (213) is spirally arranged at one end near the air outlet of the burner outer cylinder (01); The second sleeve (21) is provided with a cooling component (4), including a water supply pipe (41) and a return water pipe (42). The water supply pipe (41) and the return water pipe (42) are respectively arranged in the fixed end of the second sleeve (21), and the water supply pipe (41) is slidably engaged with the water inlet end of the first flow channel (213), and the return water pipe (42) is slidably engaged with the water outlet end of the first flow channel (213). The second sleeve (21) has an inlet (43) and an outlet (44) respectively on its extended end. The inlet (43) is connected to the water supply pipe (41) and is used to supply cooling medium into the water supply pipe (41). The outlet (44) is connected to the return water pipe (42).

4. The plasma igniter with a protective structure according to claim 3, characterized in that: The first sleeve (11) and the cathode rod (12) are respectively provided with a second flow channel (111) and a third flow channel (121). The second flow channel (111) is spirally arranged at one end near the anode ring (13), and the third flow channel (121) is spirally arranged at the end near the cathode rod (12). The inlets of the second flow channel (111) and the third flow channel (121) are respectively connected to the inlet (43), and their outlets are respectively connected to the outlet (44).

5. The plasma igniter with a protective structure according to claim 1, characterized in that: A baffle (5) is provided at the opening (211) of the telescopic end of the second sleeve (21).

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