Plasma igniter

Abstract

The utility model discloses a plasma igniter. The utility model is applied to an outer cylinder of a burner, and is characterized in that the ignition component comprises a first sleeve which is arranged in the outer cylinder of the burner in a sliding and penetrating manner; 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 adjusting part comprises a moving unit which is arranged on the burner outer cylinder and connected with the power supply unit; according to the utility model, the power supply unit is driven by the moving unit to reciprocate along the axial direction of the first sleeve, so that the cathode bar and the anode ring are driven to move close to or far away from the air outlet of the burner outer cylinder, and at the moment, the distance between the cathode bar and the air outlet of the burner outer cylinder is the burning distance of pulverized coal in the burner outer cylinder; therefore, the distance between the cathode bar and the air outlet of the combustor outer barrel is adjusted according to the ideal combustion distance of pulverized coal of different specifications, and the applicability is improved.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, and in particular to a plasma igniter. 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, in order to adapt to the combustion characteristics of different fuels and optimize ignition efficiency, the optimal combustion distance of each fuel is also different. However, existing plasma igniters are usually fixed, and the position of their ignition point is difficult to adjust, resulting in a fixed combustion distance in the burner and limited applicability.

[0004] Therefore, a plasma igniter that can adjust the combustion distance by changing the position of the ignition point is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to address the above-mentioned shortcomings by providing a plasma igniter for use in the outer cylinder of a burner. The feature is that it includes an ignition component, which includes a first sleeve that is axially slidably inserted into the outer cylinder of the burner.

[0006] The cathode rod is coaxially inserted inside the first sleeve;

[0007] An anode ring is disposed at the insertion end of the first sleeve and coaxially sleeved around the cathode rod;

[0008] The power supply unit is located at the extended end of the first sleeve and is electrically connected to the cathode rod;

[0009] An adjustment component, including a moving unit, is disposed on the outer cylinder of the burner and located below the power supply unit, for driving the power supply unit and the first sleeve disposed on one side thereto move toward the air outlet of the outer cylinder of the burner.

[0010] Furthermore, a second sleeve is provided inside the outer cylinder of the burner, and the second sleeve is coaxially sleeved on the outer periphery of the first sleeve and slidably connected to it;

[0011] The second sleeve has a cleaning ring at its insertion end, and its cleaning surface is in contact with the outer surface of the first sleeve.

[0012] Furthermore, the cleaning ring is provided with a first inclined surface;

[0013] The first sleeve is also provided with a protective ring for protecting the cleaning ring at the insertion end, and a second inclined surface corresponding to the first inclined surface is opened on its surface.

[0014] Furthermore, a detection unit is provided on the outer surface of the first sleeve and located between the first sleeve and the second sleeve, for detecting the moving distance of the first sleeve.

[0015] Furthermore, the adjusting component also includes an adjusting assembly slidably disposed on the movable end of the moving unit, one end of which is connected to the power supply unit for further driving the power supply unit to move.

[0016] The beneficial effects of this utility model are reflected in:

[0017] In this invention, when the combustion distance needs to be adjusted, the moving unit drives the power supply unit to reciprocate along the axial direction of the first sleeve, thereby driving the cathode rod and the anode ring to move together toward or away from the air outlet of the burner outer cylinder until the cathode rod moves to the predetermined position. At this time, the distance between the cathode rod and the air outlet of the burner outer cylinder is the combustion distance of the pulverized coal in the burner outer cylinder. Thus, the distance between the cathode rod and the air outlet of the burner outer cylinder can be adjusted according to the ideal combustion distance of different specifications of pulverized coal, thereby improving applicability. Attached Figure Description

[0018] Figure 1 This is a perspective view of the plasma igniter described in this utility model;

[0019] Figure 2 This is a cross-sectional view of the plasma igniter described in this utility model;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 for Figure 2 A magnified view of point B in the middle.

[0022] In the picture:

[0023] 01. Burner outer cylinder; 1. Ignition component; 11. First sleeve; 12. Cathode rod; 13. Anode ring; 14. Power supply unit; 2. Adjustment component; 21. Moving unit; 22. Adjustment assembly; 221. Slide table; 222. Lead screw; 223. Power unit; 3. Second sleeve; 31. Cleaning ring; 311. First inclined surface; 32. Protective ring; 321. Second inclined surface; 4. Detection unit. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-4 This utility model discloses a plasma igniter applied to the outer cylinder 01 of a burner. It is characterized by including an ignition component 1, which includes a first sleeve 11, which is axially inserted into the outer cylinder 01 of the burner and can move towards or away from the air outlet of the outer cylinder 01 of the burner.

[0026] The cathode rod 12 is coaxially inserted inside the first sleeve 11;

[0027] The anode ring 13 is disposed at the insertion end of the first sleeve 11 and coaxially sleeved around the cathode rod 12;

[0028] 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;

[0029] Adjustment component 2 includes a moving unit 21, which is disposed on the burner outer cylinder 01 and located below the power supply unit 14, for driving the power supply unit 14 and the first sleeve disposed on one side thereto move toward the air outlet of the burner outer cylinder 01.

[0030] In specific implementation, when it is necessary to adjust the combustion distance, the adjusting component 2 drives the power supply unit 14 to move back and forth along the first sleeve 11 axially. The power supply unit 14 drives the cathode rod 12 and the anode ring 13 together to move towards or away from the air outlet of the outer cylinder 01 of the burner through the first sleeve 11 until the cathode rod 12 and the anode ring 13 are adjusted to a suitable position. At this time, the distance between the cathode rod 12 and the air outlet of the outer cylinder 01 of the burner is the predetermined combustion distance. The power supply unit 14 supplies power to the cathode rod 12, causing it to react with the anode ring 13 and generate an electric arc. After the coal powder comes into contact with the electric arc, it is ignited and completes the ignition.

[0031] In this invention, when the combustion distance needs to be adjusted, the moving unit 21 drives the power supply unit 14 to reciprocate along the axial direction of the first sleeve 11, thereby driving the cathode rod 12 and the anode ring 13 to move together toward or away from the air outlet of the burner outer cylinder 01 until the cathode rod 12 moves to the predetermined position. At this time, the distance between the cathode rod 12 and the air outlet of the burner outer cylinder 01 is the combustion distance of the pulverized coal in the burner outer cylinder 01. Thus, the distance between the cathode rod 12 and the air outlet of the burner outer cylinder 01 can be adjusted according to the ideal combustion distance of pulverized coal of different specifications, thereby improving applicability.

[0032] It should be noted that the working principle of the cathode rod 12 and the anode ring 13 is common knowledge to those skilled in the art, so it will not be described in detail here. The first sleeve 11 has an opening at the insertion end for the coal powder to contact the electric arc (not shown in the figure).

[0033] Preferably, the moving unit 21 may employ a linear module as used in the prior art.

[0034] In one embodiment, a second sleeve 3 is inserted inside the outer cylinder 01 of the burner, and the first sleeve 11 is slidably fitted inside the second sleeve 3 on the same axis. The sliding connection between the first sleeve 11 and the second sleeve 3 is a dynamic sealing connection.

[0035] The second sleeve 3 is provided with a cleaning ring 31 at its extended end. Its cleaning surface is provided with a flexible cleaning layer and contacts the outer surface of the first sleeve 11, which is used to clean the coal powder attached to the surface of the first sleeve 11.

[0036] With this design, when the adjusting component 2 moves the first sleeve 11 away from the air outlet of the burner outer cylinder 01, the first sleeve 11 moves relative to the cleaning ring 31. At this time, the cleaning ring 31 scrapes off the coal dust adhering to the surface of the first sleeve 11. At the same time, the flexible cleaning layer prevents the first sleeve 11 from being damaged by friction with the cleaning ring 31 when it moves, so as to prevent coal dust from entering between the first sleeve 11 and the second sleeve 3, ensuring that each sleeve and its dynamic seal can work normally.

[0037] Preferably, the flexible cleaning layer can be made of high-temperature silicone rubber, which is a technology in the prior art.

[0038] In one embodiment, the cleaning ring 31 has a first inclined surface 311;

[0039] The first sleeve 11 has a protective ring 32 at its extended end. The protective ring 32 surrounds the cleaning ring 31 and is used to protect the cleaning ring 31. A second inclined surface 321 corresponding to the first inclined surface 311 is opened on its surface. The second inclined surface 321 is used to guide the coal powder to separate from the protective ring 32.

[0040] With this design, when pulverized coal is introduced into the burner outer cylinder 01, the protective ring 32 prevents the pulverized coal from directly contacting the cleaning ring 31, thereby reducing the amount of pulverized coal adhering to the cleaning ring 31. At the same time, the pulverized coal scraped off by the cleaning ring 31 falls onto the second inclined surface 321 under the action of gravity, and is guided by the second inclined surface 321 to separate from the protective ring 32 and blown towards the ignition point with the hot airflow in the burner outer cylinder 01.

[0041] In one embodiment, a detection unit 4 is provided between the first sleeve 11 and the second sleeve 3. The detection unit 4 is disposed on the outer wall of the first sleeve 11 and is signal-connected to a control component (not shown in the figure). The control component is signal-connected to the moving unit 21 and is used to send a stop signal to the moving unit 21. The detection point of the detection unit 4 is located at the extended end of the second sleeve 3 and is used to detect the moving distance of the first sleeve 11.

[0042] With this design, when the first sleeve 11 moves, the detection unit 4 moves together with the first sleeve 11. At this time, the distance between the detection unit 4 and the extended end of the second sleeve 3 changes with the movement of the first sleeve 11 until its predetermined distance corresponds to the extension amount of the first sleeve 11. At this time, the detection unit 4 sends a signal to the control component to stop the moving unit 21 from continuing to move, so as to avoid excessive displacement of the first sleeve 11.

[0043] Preferably, the detection unit 4 can be a photoelectric sensor from the prior art.

[0044] In one embodiment, the adjusting component 2 is further provided with an adjusting assembly 22, including a slide table 221 slidably disposed on the moving end of the moving unit 21, the power supply unit 14 disposed on the slide table 221, a lead screw 222 rotatably disposed in the moving end of the moving unit 21, the slide table 221 being threadedly connected to the lead screw 222, and a power unit 223 for driving the lead screw 222 to rotate is also provided on one side of the moving end of the moving unit 21. When the lead screw 222 rotates, it is used to drive the slide table 221 to reciprocate along the axial direction of the first sleeve 11.

[0045] With this design, after the moving unit 21 moves the cathode rod 12 and anode ring 13 to the approximate position via the power supply unit 14, the power unit 223 drives the lead screw 222 to rotate, causing it to drive the slide table 221 to move further within a small range, so that the cathode rod 12 and anode ring 13 can be moved precisely to the predetermined position, thereby improving the displacement accuracy while ensuring adjustment efficiency.

[0046] Preferably, the power unit can be an electric motor from the prior art.

[0047] 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.

[0048] 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.

[0049] Additionally, "multiple" refers to two or more.

[0050] 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, applied to the outer cylinder (01) of a burner, characterized in that, It includes an ignition component (1) and a first sleeve (11), which is axially slidably inserted inside 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 adjusting component (2) includes a moving unit (21) disposed on the burner outer cylinder (01) and located below the power supply unit (14), for driving the power supply unit (14) and the first sleeve (11) disposed on one side thereto move toward the air outlet of the burner outer cylinder (01) or away from it.

2. The plasma igniter according to claim 1, characterized in that: The burner outer cylinder (01) is provided with a second sleeve (3), and the second sleeve (3) is coaxially sleeved on the outer periphery of the first sleeve (11) and slidably connected to it; The second sleeve (3) has a cleaning ring (31) at its insertion end, and its cleaning surface is in contact with the outer surface of the first sleeve (11).

3. The plasma igniter according to claim 2, characterized in that: The first sleeve (11) is also provided with a protective ring (32) at the insertion end for protecting the cleaning ring (31).

4. A plasma igniter according to claim 2, characterized in that: A detection unit (4) is provided on the outer surface of the first sleeve (11), which is located between the first sleeve (11) and the second sleeve (3) and is used to detect the moving distance of the first sleeve (11).

5. A plasma igniter according to claim 1, characterized in that: The adjustment component (2) further includes an adjustment assembly (22) that is slidably disposed on the movable end of the moving unit (21), one end of which is connected to the power supply unit (14) for further driving the power supply unit (14) to move.

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