Burning device for oil gun of combustor

Abstract

The utility model provides a burner oil gun purging device, which relates to the technical field of oil gun cleaning devices, and comprises an oil gun body communicated with an oil supply pipeline, an oil return part integrated in the middle of the oil gun body, the oil return part is communicated with an oil return pipeline, and a piston ejector rod assembly is arranged in the middle of the oil return part in a penetrating manner; one end of the piston ejector rod assembly abuts against an oil spraying opening in the top end of the oil gun body, the other end of the piston ejector rod assembly is communicated with a purging pipeline, an air compressor is arranged at the purging power end of the purging pipeline, one branch of the purging pipeline is communicated with an oil supply pipeline, the other branch of the purging pipeline is communicated with an oil return pipeline, and an electromagnetic valve assembly is arranged on the purging pipeline. The electromagnetic valve assembly and the air compressor are in signal connection with the control cabinet, the technical problem that in the prior art, the hole diameter of a nozzle is decreased or the nozzle is blocked, and the combustion efficiency is affected is solved, and the technical effect that accumulated oil remaining in the oil gun is automatically blown away is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of oil gun cleaning devices, and in particular to a burner oil gun purging device. Background Technology

[0002] The burner oil gun is the core component of a waste incinerator. In the field of waste incineration, when the initial calorific value of the waste is insufficient, the oil gun breaks the fuel into micron-sized droplets through mechanical atomization or media atomization. After mixing with the combustion air, the droplets are ignited to form a high-temperature flame to maintain the furnace temperature. When the combustion conditions fluctuate (such as sudden changes in the composition of the waste), the oil gun can quickly intervene to supplement energy and prevent the furnace from going out.

[0003] Current waste incinerators do not have a purging system for their burner fuel nozzles. Operators must manually disassemble the nozzle components and clean internal impurities and scale after the nozzle has been running for a period of time, a method that is extremely inefficient.

[0004] Due to the lack of a purging device, impurities in the fuel, as well as carbon deposits and coke produced during combustion, gradually accumulate inside the fuel nozzle, especially at the nozzle orifice, causing the orifice diameter to shrink or even become blocked. This obstructs fuel injection, worsens atomization, and results in uneven fuel mist particle size, making it difficult to mix thoroughly with air and reducing combustion efficiency. Furthermore, when the nozzle is blocked, a larger fuel supply is required to maintain the burner's normal power output, which further exacerbates energy consumption. Utility Model Content

[0005] The purpose of this invention is to provide a burner oil gun purging device to alleviate the technical problem in the prior art where the nozzle diameter becomes smaller or blocked, affecting combustion efficiency.

[0006] This utility model provides a burner oil gun purging device, including: oil gun body, oil return section, piston rod assembly, air compressor, purging pipeline, solenoid valve assembly and control cabinet;

[0007] The oil gun body is connected to the oil supply pipeline, the oil return section is integrated in the middle of the oil gun body, the oil return section is connected to the oil return pipeline, and a piston rod assembly is installed in the middle of the oil return section.

[0008] One end of the piston rod assembly is abutted against the oil nozzle at the top of the oil gun body, and the other end of the piston rod assembly is connected to the purging pipeline. An air compressor is installed at the purging power end of the purging pipeline. One branch of the purging pipeline is connected to the oil supply pipeline, and another branch of the purging pipeline is connected to the return oil pipeline. A solenoid valve assembly is installed on the purging pipeline. The solenoid valve assembly and the air compressor are respectively connected to the control cabinet signal.

[0009] Furthermore, the solenoid valve assembly includes a first purge solenoid valve, an oil gun solenoid valve, and a second purge solenoid valve.

[0010] 5. The first purge solenoid valve is installed in the branch line where the purge pipeline connects to the oil supply pipeline, the oil gun solenoid valve is installed in the branch line where the purge pipeline connects to the piston rod assembly, and the second purge solenoid valve is installed in the branch line where the purge pipeline connects to the return oil pipeline.

[0011] The first purge solenoid valve, the oil gun solenoid valve, and the second purge solenoid valve are respectively connected to the control cabinet via signal connections.

[0012] Furthermore, a pressure reducing valve is installed near the air compressor in the purging line.

[0013] Furthermore, the air pressure of the air compressor is not less than 0.5 MPa.

[0014] Furthermore, an oil supply solenoid valve is installed on the oil supply pipe connected to the oil gun body, and an oil return solenoid valve is installed on the oil return pipe connected to the oil return section.

[0015] Furthermore, an atomizing plate is provided at the bottom of the fuel nozzle inside the fuel gun body. The atomizing plate 5 is used for the fuel to mix with air and burn after being formed into fuel mist.

[0016] Furthermore, the piston rod assembly includes a rod, a piston, a slider, a connecting plate, a spring, and an air chamber;

[0017] The push rod is cylindrical and inserted into the oil return section. A piston is fixed to one end of the push rod near the oil nozzle of the oil gun body. A connecting plate is set at the other end of the push rod. A spring is set at the bottom end of the connecting plate. A slider is set at the top end of the connecting plate. An air cavity is formed between the slider and the connecting plate. The air cavity is connected to the purging pipeline.

[0018] Furthermore, the inner wall of the oil gun body is coated with a coating, which is a high-chromium-nickel alloy or stainless steel, and the coating thickness is 0.3mm to 0.5mm.

[0019] Beneficial effects:

[0020] This utility model provides a burner oil gun purging device, comprising: an oil gun body connected to an oil supply pipeline, an oil return section integrated in the middle of the oil gun body and connected to an oil return pipeline, a piston rod assembly passing through the middle of the oil return section; one end of the piston rod assembly abutting against the oil injection port at the top of the oil gun body, the other end of the piston rod assembly connected to a purging pipeline, an air compressor installed at the purging power end of the purging pipeline, one branch of the purging pipeline connected to the oil supply pipeline, another branch of the purging pipeline connected to the oil return pipeline, a solenoid valve assembly installed on the purging pipeline, and the solenoid valve assembly and the air compressor respectively connected to the control cabinet via signals.

[0021] The piston rod assembly, inserted through the middle of the return oil section and with one end resting against the fuel injector, allows for precise fuel injection control, improving the stability and accuracy of fuel injection. Through the purging pipeline and air compressor, compressed air is used to purge the fuel nozzle and pipelines, preventing the accumulation of oil and impurities, reducing the risk of blockage, and extending the equipment's lifespan. Branches of the purging pipeline connect to the supply and return oil pipelines, allowing for simultaneous purging and cleaning of both pipelines, improving cleaning efficiency.

[0022] In addition, the solenoid valve assembly and air compressor are connected to the control cabinet via signal, enabling automatic online purging of the oil gun through intelligent control. This eliminates the need for manual intervention, significantly saving labor costs, improving work efficiency, and reducing abnormal oil gun operation caused by purging device malfunctions. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the burner oil gun purging device provided in an embodiment of this utility model;

[0025] Figure 2 A connection diagram of the control cabinet in the burner oil gun purging device provided in an embodiment of this utility model;

[0026] Figure 3 A schematic diagram of the oil circuit and purging air route of the burner oil gun purging device provided in this embodiment of the utility model.

[0027] Icons: 1 - Oil gun body; 101 - Oil supply solenoid valve; 102 - Atomizing plate; 2 - Oil return section; 201 - Oil return solenoid valve; 3 - Piston rod assembly; 301 - Rod; 302 - Piston; 303 - Slider; 304 - Connecting plate; 305 - Spring; 306 - Air chamber; 4 - Air compressor; 5 - Purge pipeline; 6 - Solenoid valve assembly; 601 - First purge solenoid valve; 602 - Oil gun solenoid valve; 603 - Second purge solenoid valve; 604 - Pressure reducing valve; 7 - Control cabinet. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0035] This utility model embodiment provides a burner oil gun purging device, including: oil gun body 1, oil return section 2, piston rod assembly 3, air compressor 4, purging pipeline 5, solenoid valve assembly 6, and control cabinet 7;

[0036] The oil gun body 1 is connected to the oil supply pipeline, the oil return section 2 is integrated in the middle of the oil gun body 1, the oil return section 2 is connected to the oil return pipeline, and the piston rod assembly 3 is installed in the middle of the oil return section 2.

[0037] One end of the piston rod assembly 3 is abutted against the oil nozzle at the top of the oil gun body 1, and the other end of the piston rod assembly 3 is connected to the purge pipe 5. An air compressor 4 is installed at the purge power end of the purge pipe 5. One branch of the purge pipe 5 is connected to the oil supply pipe, and the other branch of the purge pipe 5 is connected to the return oil pipe. A solenoid valve assembly 6 is installed on the purge pipe 5. The solenoid valve assembly 6 and the air compressor 4 are respectively connected to the control cabinet 7 via signal.

[0038] Specifically, such as Figure 1 , Figure 2 As shown, the oil gun body 1 has a through-flow fuel flow channel inside, which is rigidly connected to the external fuel supply pipeline, and forms a fuel injection port at the top for fuel atomization and injection. In the middle area of ​​the oil gun body 1, an integrally formed oil return section 2 is formed. The oil return section 2 is a hollow cylindrical structure, which is connected to the oil return pipeline on the outside to form a fuel circulation loop. A piston rod assembly 3 is inserted through the middle of the interior. One end of the piston rod assembly 3 extends to the fuel injection port at the top of the oil gun body 1, and controls the switch of the fuel injection port by abutting against it. The other end is connected to the purge pipeline 5, which is used to switch the nozzle on and off using compressed air in the purge pipeline 5. When the burner is started, compressed air is introduced into the piston rod assembly 3, causing the oil gun rod to move backward and open the head fuel injection port. After the burner is stopped, it automatically shuts off according to the time set by the time relay to prevent dust inside the furnace from entering the oil gun body 1.

[0039] The purging pipeline 5 is a branched pipeline. Its power end is connected to the outlet of the air compressor 4 to obtain compressed air as the purging medium. Three branches are located in the middle of the pipeline. Besides the branch connected to the piston rod assembly 3 mentioned above, which controls the fuel injector opening and closing, the other two branches are connected to the fuel supply pipeline and the fuel return pipeline respectively via tee joints, forming a "two-way purging" channel. A solenoid valve assembly 6 is installed on the purging pipeline 5 for automated control. Both the solenoid valve assembly 6 and the air compressor 4 are connected to the control cabinet 7 via signal lines, receiving start / stop, pressure regulation, and purging timing commands from the control system. When the burner stops, the purging process is automatically triggered based on pre-set program logic.

[0040] After the burner stops running, the piston rod assembly 3 can automatically complete the extension and retraction action with the help of the pressure generated by the compressed air in the purge pipe 5.

[0041] The bidirectional branches of the purging line 5 connect to the fuel supply line and the return line respectively, enabling a comprehensive and thorough cleaning of the entire fuel circulation system—from fuel inlet to fuel injection to fuel return—during the purging operation. In the forward purging phase, compressed air travels from the fuel supply line along the fuel path and is ultimately ejected at high speed through the fuel injector. During this process, the high-speed compressed air removes carbon deposits and impurities accumulated on the surfaces of components such as the atomizing vanes at the fuel injector. In the reverse purging phase, compressed air enters from the return line in reverse, deeply flushing the inner wall of the return section 2 and the piston sealing surface. This bidirectional purging reduces the problem of cleaning dead zones.

[0042] Through the coordinated operation of control cabinet 7, solenoid valve assembly 6, and air compressor 4, the entire purging process is automated in terms of control and parameter adjustment. Control cabinet 7 can automatically trigger the purging operation within 30 seconds after the burner stops running, according to a pre-set program, to prevent residual fuel from coking in a high-temperature environment.

[0043] It should be noted that the purging line 5 is also equipped with a filter to ensure the cleanliness of the compressed air used for purging the oil gun.

[0044] In an embodiment of this utility model, the solenoid valve assembly 6 includes a first purge solenoid valve 601, an oil gun solenoid valve 602, and a second purge solenoid valve 603. The first purge solenoid valve 601 is located in a branch of the purge pipeline 5 that connects to the oil supply pipeline, the oil gun solenoid valve 602 is located in a branch of the purge pipeline 5 that connects to the piston rod assembly 3, and the second purge solenoid valve 603 is located in a branch of the purge pipeline 5 that connects to the return oil pipeline. The first purge solenoid valve 601, the oil gun solenoid valve 602, and the second purge solenoid valve 603 are respectively signal-connected to the control cabinet 7.

[0045] A pressure reducing valve 604 is also installed near the air compressor in the purging line.

[0046] The air pressure of the air compressor shall not be less than 0.5 MPa.

[0047] An oil supply solenoid valve 101 is installed on the oil supply pipe connected to the oil gun body 1, and an oil return solenoid valve 201 is installed on the oil return pipe connected to the oil return section 2.

[0048] Specifically, the solenoid valve assembly 6 includes a first purge solenoid valve 601, an oil gun solenoid valve 602, and a second purge solenoid valve 603. These three solenoid valves are respectively installed on different branches of the purge pipeline 5. The first purge solenoid valve 601 is located on the branch connecting the purge pipeline 5 to the oil supply pipeline, controlling whether compressed air enters the oil supply pipeline. Similarly, the second purge solenoid valve 603 is installed on the branch connecting the purge pipeline 5 to the return oil pipeline. It controls whether compressed air can enter the return oil pipeline; when open, it purges the return oil pipeline, removing oil and impurities; when closed, it stops purging. The oil gun solenoid valve 602 is located on the branch connecting the purge pipeline 5 to the piston rod assembly 3. It controls whether compressed air flows into the piston rod assembly 3. When compressed air enters the piston rod assembly 3, it affects the movement of the piston rod, thereby controlling the opening or closing of the oil injection port. All three solenoid valves are connected to the control cabinet 7 via electrical signals. For example, if scale buildup is found in the oil supply pipeline after the oil gun has been running for a period of time, control cabinet 7 can open the first purge solenoid valve 601 separately to purge the oil supply pipeline without affecting other parts. Targeted purging improves purging efficiency.

[0049] A pressure reducing valve 604 is installed near the air compressor 4 in the purging pipeline 5. The air pressure generated by the air compressor 4 is not less than 0.5 MPa. The pressure reducing valve 604 reduces the pressure of the high-pressure air output by the air compressor 4, preventing excessive pressure from damaging the internal components of the oil gun and extending the service life of the equipment. In addition, stable pressure ensures the consistency of the purging effect, allowing the compressed air to purge all parts evenly and effectively, thus ensuring the quality of the purging.

[0050] A fuel supply solenoid valve 101 is installed on the fuel supply pipe connected to the fuel nozzle body 1. This valve controls the flow of fuel into the fuel nozzle body 1. A return fuel solenoid valve 201 is installed on the return fuel pipe connected to the return fuel section 2. This valve controls the opening and closing of the return fuel pipe.

[0051] In an embodiment of this utility model, an atomizing plate 102 is provided at the bottom of the fuel nozzle inside the fuel gun body 1. The atomizing plate 102 is used for fuel to mix with air and burn after forming fuel mist.

[0052] The piston rod assembly 3 includes a rod 301, a piston 302, a slider 303, a connecting plate 304, a spring 305, and an air cavity 306;

[0053] The push rod 301 is cylindrical and passes through the oil return section 2. A piston 302 is fixed to one end of the push rod 301 near the oil nozzle of the oil gun body 1. A connecting plate 304 is provided at the other end of the push rod 301. A spring 305 is provided at the bottom end of the connecting plate 304. A slider 303 is provided at the top end of the connecting plate 304. An air cavity 306 is formed between the slider 303 and the connecting plate 304. The air cavity 306 is connected to the purge pipe 5.

[0054] The inner wall of the oil gun body 1 is coated with a coating, which is a high-chromium-nickel alloy or stainless steel, and the thickness of the coating is 0.3mm to 0.5mm.

[0055] Specifically, an atomizing plate 102 is installed at the bottom of the fuel nozzle inside the fuel gun body 1. When fuel passes through the fuel gun body 1 and reaches the fuel nozzle, it passes through the atomizing plate 102, which breaks the fuel into fine droplets to form an oil mist.

[0056] In the piston rod assembly 3, the push rod 301 is cylindrical and extends through the oil return section 2, near the top of the oil nozzle of the oil gun body 1. It is fixed to the piston 302 by welding. When the piston 302 moves vertically within the oil return section 2 under the force of compressed air, it controls the oil nozzle, opening or closing it.

[0057] The other end of the push rod 301 is connected to a connecting plate 304. The connecting plate 304 is a flat plate structure with certain strength and rigidity, used to apply force to the spring 305 at the bottom. A slider 303 is installed at the top of the connecting plate 304, and an air cavity 306 is formed between the slider 303 and the connecting plate 304 through a closed structure at the top and bottom. The air cavity 306 is connected to the purge pipe 5 through a pipe. When compressed air in the purge pipe 5 enters the air cavity 306, the air pressure inside the cavity rises rapidly. The force generated by the high-pressure air pushes the connecting plate 304 downward, which in turn moves the slider 303 downward, compressing the spring 305 at the bottom. The spring 305 is made of high-strength, corrosion-resistant metal. When the air pressure inside the air cavity 306 changes, the connecting plate 304 compresses the spring 305 downward. At the same time, the spring 305 has a restoring ability; when the air pressure returns to normal, the spring 305 returns to its initial position, and the cycle continues.

[0058] The inner wall of the oil gun body 1 is coated with a high-chromium-nickel alloy or stainless steel. High-chromium-nickel alloys offer high hardness, good oxidation resistance, and resistance to high-temperature corrosion; stainless steel provides excellent corrosion resistance and a certain level of strength. The coating thickness is between 0.3mm and 0.5mm. The coating is applied to the inner wall of the oil gun body 1 using thermal spraying or electroplating methods.

[0059] According to the above embodiments, the specific working process of the burner oil gun purging device provided by this utility model is as follows:

[0060] like Figure 3 As shown, when the control cabinet 7 remotely issues a start command, the oil gun solenoid valve 602, the oil supply solenoid valve 101, and the oil return solenoid valve 201 all open, and oil injection into the furnace begins. When the burner stops running and the oil injection is completed, the control cabinet 7 remotely issues a stop command, closing the oil gun solenoid valve 602, the oil supply solenoid valve 101, and the oil return solenoid valve 201, and purging begins.

[0061] The first purge solenoid valve 601 and the second purge solenoid valve 603 open simultaneously, and compressed air flows along different branches. One branch flows through the fuel supply pipe towards the top nozzle of the fuel gun body 1, impacting the surface of the atomizing plate 102 and the inner wall of the nozzle, cleaning away residual fuel, carbon deposits, and impurities. The other branch flows through the return fuel pipe to flush the inner wall of the return fuel section 2 and the sealing surface of the piston rod assembly 3, removing oil stains and coke from the return fuel path.

[0062] When the preset purging time is reached, control cabinet 7 sends a shutdown signal, closing the first purging solenoid valve 601 and the second purging solenoid valve 603, cutting off the compressed air supply. The entire purging device returns to its initial standby state, waiting for the next burner operation signal to restart.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A burner oil gun purging device, characterized in that, include: The oil gun body (1), oil return section (2), piston rod assembly (3), air compressor (4), purging pipeline (5), solenoid valve assembly (6) and control cabinet (7); The oil gun body (1) is connected to the oil supply pipeline, the oil return section (2) is integrated in the middle of the oil gun body (1), the oil return section (2) is connected to the oil return pipeline, and the piston rod assembly (3) passes through the middle of the oil return section (2). One end of the piston rod assembly (3) abuts against the oil nozzle at the top of the oil gun body (1), and the other end of the piston rod assembly (3) is connected to the purge pipe (5). The purge power end of the purge pipe (5) is equipped with the air compressor (4). One branch of the purge pipe (5) is connected to the oil supply pipe, and the other branch of the purge pipe (5) is connected to the return oil pipe. The purge pipe (5) is equipped with the solenoid valve assembly (6). The solenoid valve assembly (6) and the air compressor (4) are respectively connected to the control cabinet (7) via signal connection.

2. The burner oil gun purging device according to claim 1, characterized in that, The solenoid valve assembly (6) includes a first purge solenoid valve (601), an oil gun solenoid valve (602), and a second purge solenoid valve (603). The first purge solenoid valve (601) is located in the branch of the purge pipeline (5) connected to the oil supply pipeline, the oil gun solenoid valve (602) is located in the branch of the purge pipeline (5) connected to the piston rod assembly (3), and the second purge solenoid valve (603) is located in the branch of the purge pipeline (5) connected to the return oil pipeline. The first purge solenoid valve (601), the oil gun solenoid valve (602), and the second purge solenoid valve (603) are respectively signal-connected to the control cabinet (7).

3. The burner oil gun purging device according to claim 2, characterized in that, A pressure reducing valve (604) is also provided near the air compressor (4) in the purging pipeline (5).

4. The burner oil gun purging device according to claim 1, characterized in that, The air pressure of the air compressor (4) is not less than 0.5 MPa.

5. The burner oil gun purging device according to claim 1, characterized in that, An oil supply solenoid valve (101) is provided on the oil supply pipe connected to the oil gun body (1), and an oil return solenoid valve (201) is provided on the oil return pipe connected to the oil return section (2).

6. The burner oil gun purging device according to claim 1, characterized in that, The bottom of the oil nozzle inside the oil gun body (1) is provided with an atomizing plate (102), which is used for fuel to mix with air and burn after the fuel is formed into an oil mist.

7. The burner oil gun purging device according to claim 1, characterized in that, The piston rod assembly (3) includes a rod (301), a piston (302), a slider (303), a connecting plate (304), a spring (305), and an air cavity (306); The push rod (301) is cylindrical and passes through the oil return section (2). The piston (302) is fixed to one end of the push rod (301) near the oil nozzle of the oil gun body (1). The connecting plate (304) is provided at the other end of the push rod (301). The spring (305) is provided at the bottom end of the connecting plate (304). The slider (303) is provided at the top end of the connecting plate (304). The air cavity (306) is formed between the slider (303) and the connecting plate (304). The air cavity (306) is connected to the purging pipe (5).

8. The burner oil gun purging device according to claim 1, characterized in that, The inner wall of the oil gun body (1) is coated with a coating, which is a high chromium nickel alloy or stainless steel, and the thickness of the coating is 0.3mm to 0.5mm.

Images