Liquid fuel burner capable of automatically preventing blockage and residual smoke

Abstract

The utility model discloses a liquid fuel burner capable of automatically preventing blocking and residual smoke. The liquid fuel burner comprises a furnace end, an oil tank, a nozzle assembly, a piston, a spring piece and a needle valve. The burner is provided with an injection cavity and a fire cover, and the nozzle assembly is installed at the lower end of the injection cavity. The nozzle assembly is provided with a nozzle and a nozzle seat; the nozzle seat is provided with an oil feeding cavity and a spring cavity; the piston telescopically moves in the oil feeding cavity; the needle valve is fixed above the piston; the spring piece is installed in the spring cavity and used for driving the piston to move upwards and enabling the needle valve to be inserted into a nozzle opening of the sprayer. The oil feeding cavity is connected with an oil inlet pipe, and when liquid fuel is fed into the oil feeding cavity, the piston can move downwards, and the needle valve is separated from the nozzle opening. According to the utility model, when the burner is turned off, the needle valve quickly interrupts the communication between the oil feeding cavity and the injection cavity, so that the generation of residual smoke can be effectively prevented, the effects of blocking prevention and dredging are achieved, and the maintenance frequency is obviously reduced.

Description

Technical Field

[0001] This utility model relates to the field of liquid fuel burner technology, and in particular to an automatic anti-clogging and anti-residual smoke liquid fuel burner. Background Technology

[0002] Traditional liquid fuel combustion devices achieve fuel combustion based on atomization injection technology. The core principle is to atomize liquid fuel into micron-sized particles through a high-pressure nozzle, which are then ignited by an ignition system to form a diffuse flame. However, this technology has significant inherent drawbacks in practical applications: when the burner enters the shutdown phase, the rapid drop in the combustion chamber temperature gradient causes unburned atomized fuel to quickly condense and liquefy. This phase change process produces a double negative impact.

[0003] Firstly, residual fuel forms larger droplets at low temperatures, creating white smoke containing unburned hydrocarbons in the combustion chamber, resulting in residual smoke emissions. Secondly, condensed fuel can cause secondary deposits at the nozzle throat and burner guide grooves, leading to blockages that require periodic unblocking and maintenance using physical probes. Therefore, further improvements are needed. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an automatic anti-clogging and anti-residual smoke liquid fuel burner.

[0005] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: an automatic anti-clogging and anti-residual smoke liquid fuel burner, including: a burner head, an oil tank, a nozzle assembly, a piston, a spring component and a needle valve;

[0006] The burner head is provided with an ejector chamber and a flame cap, and the nozzle assembly is installed at the lower end of the ejector chamber; the nozzle assembly is provided with a nozzle head and a nozzle seat; the nozzle seat is provided with an oil delivery chamber and a spring chamber; the piston is retractably movable in the oil delivery chamber; the needle valve is fixed above the piston; the spring is installed in the spring chamber to drive the piston to move upward and to insert the needle valve into the nozzle orifice of the nozzle head; the oil delivery chamber is connected to an oil inlet pipe, and when liquid fuel is delivered into the oil delivery chamber, the piston can be moved downward and the needle valve can be disengaged from the nozzle orifice.

[0007] Optionally, a high-pressure pump and an electric heating element are provided between the oil inlet pipe and the oil tank; the high-pressure pump is used to pump liquid fuel from the oil tank toward the nozzle assembly, and the electric heating element is used to heat the oil inlet pipe.

[0008] Optionally, the heating element is a heating rod; the oil inlet pipe is provided with a first winding section, which is wound around the heating element.

[0009] Optionally, the oil inlet pipe is provided with a second winding section, which is wound around the ejector cavity.

[0010] Optionally, the diameter of the oil delivery chamber is larger than the diameter of the spring chamber; a conical transition platform is provided between the oil delivery chamber and the spring chamber; the piston is provided with a conical sealing surface adapted to the conical transition platform.

[0011] Optionally, the oil delivery chamber is connected to an oil drain pipe, and an electromagnetic control valve is installed between the oil drain pipe and the oil tank.

[0012] Optionally, the spring cavity is provided with a pressure relief pipe.

[0013] Optionally, the oil delivery chamber is provided with a filter membrane, and the needle valve passes through the filter membrane.

[0014] Optionally, the burner head is equipped with an ignition component.

[0015] Optionally, the flame cap is provided with spiral-shaped inclined flame holes.

[0016] The beneficial effects of this invention are as follows: This invention achieves dynamic opening and closing optimization of the liquid fuel injection channel through a linkage control mechanism between the spring element and the needle valve. During normal burner operation, fuel pressure drives the piston downwards, disengaging the needle valve from the nozzle orifice, ensuring stable atomized fuel output. When the burner is shut off, the fuel pressure disappears, and the spring element instantly pushes the piston back to its original position, allowing the needle valve to precisely insert into the nozzle orifice to form a mechanical seal, completely blocking the fuel backflow path. When the burner is shut off, the needle valve quickly interrupts the connection between the fuel delivery chamber and the injection chamber, effectively preventing the generation of residual smoke and achieving anti-clogging and unblocking effects, significantly reducing maintenance frequency.

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the liquid fuel burner of this utility model.

[0020] Explanation of key component symbols:

[0021] 10. Burner head; 11. Injector chamber; 12. Burner cap; 121. Inclined burner hole; 20. Oil tank; 21. High-pressure pump; 22. Heating element; 23. Electromagnetic control valve; 30. Nozzle assembly; 31. Nozzle head; 311. Nozzle port; 32. Nozzle seat; 33. Oil delivery chamber; 34. Spring chamber; 35. Oil inlet pipe; 351. First winding section; 352. Second winding section; 36. Conical transition platform; 37. Oil drain pipe; 38. Pressure relief pipe; 39. Filter membrane; 40. Piston; 41. Conical sealing surface; 50. Spring component; 60. Needle valve. Detailed Implementation

[0022] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0023] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. 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.

[0025] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0026] Example

[0027] Reference Figure 1 The present invention proposes an automatic anti-clogging and anti-residual smoke liquid fuel burner, comprising: a burner head 10, an oil tank 20, a nozzle assembly 30, a piston 40, a spring component 50, and a needle valve 60.

[0028] The burner head 10 is provided with an ejector chamber 11 and a burner cap 12. The nozzle assembly 30 is installed at the lower end of the ejector chamber 11. The nozzle assembly 30 is provided with a nozzle 31 and a nozzle seat 32. The nozzle seat 32 is provided with an oil delivery chamber 33 and a spring chamber 34. The piston 40 is telescopically movable in the oil delivery chamber 33. The needle valve 60 is fixed above the piston 40. The spring 50 is installed in the spring chamber 34 to drive the piston 40 to move upward and to insert the needle valve 60 into the nozzle port 311 of the nozzle 31. The oil delivery chamber 33 is connected to an oil inlet pipe 35. When liquid fuel is delivered into the oil delivery chamber 33, the piston 40 can be moved downward and the needle valve 60 can be disengaged from the nozzle port 311.

[0029] In this invention, the linkage control mechanism between the spring element 50 and the needle valve 60 achieves dynamic opening and closing optimization of the liquid fuel injection channel. During normal burner operation, fuel pressure drives the piston 40 downwards, disengaging the needle valve 60 from the nozzle orifice 311, ensuring stable atomized fuel output. When the burner is shut off, the fuel pressure disappears, and the spring element 50 instantly pushes the piston 40 back to its original position, allowing the needle valve 60 to precisely insert into the nozzle orifice 311 to form a mechanical seal, completely blocking the fuel backflow path. When the burner is shut off, the needle valve 60 quickly interrupts the connection between the fuel delivery chamber 33 and the injection chamber 11, effectively preventing the generation of residual smoke and achieving anti-clogging and unblocking effects, significantly reducing maintenance frequency.

[0030] In this embodiment, a high-pressure pump 21 and an electric heating element 22 are provided between the oil inlet pipe 35 and the oil tank 20; the high-pressure pump 21 is used to pump liquid fuel from the oil tank 20 to the nozzle assembly 30, and the electric heating element 22 is used to heat the oil inlet pipe 35. The electric heating element 22 can heat and atomize the liquid fuel before sending it into the oil delivery chamber 33.

[0031] Specifically, the heating element 22 is a heating rod; the oil inlet pipe 35 is provided with a first winding section 351, which is wound around the heating element 22.

[0032] In some embodiments, the oil inlet pipe 35 is provided with a second winding section 352, which is wound around the ejector cavity 11. The second winding section 352 can utilize the residual heat in the ejector cavity 11 to preheat and atomize the liquid fuel, and can simultaneously shut off the heating element 22, achieving energy-saving and environmentally friendly effects.

[0033] In this embodiment, the diameter of the oil delivery chamber 33 is larger than the diameter of the spring chamber 34; a conical transition platform 36 is provided between the oil delivery chamber 33 and the spring chamber 34; the piston 40 is provided with a conical sealing surface 41 that matches the conical transition platform 36. The cooperation and compression of the conical transition platform 36 and the conical sealing surface 41 can effectively achieve the self-sealing and limiting effect of the piston 40 and the spring chamber 34.

[0034] In this embodiment, the fuel delivery chamber 33 is connected to a drain pipe 37, and an electromagnetic control valve 23 is installed between the drain pipe 37 and the fuel tank 20. The electromagnetic control valve 23 can control the opening and closing of the fuel pipe. When the burner is turned off, the electromagnetic valve is opened synchronously, allowing the fuel in the fuel delivery chamber 33 to flow back to the fuel tank 20.

[0035] Furthermore, the spring cavity 34 is provided with a pressure relief pipe 38. This pressure relief pipe 38 can discharge some of the fuel accumulated in the spring cavity 34, and at the same time, it can connect the spring cavity 34 to air, which facilitates the up and down movement of the piston 40.

[0036] In some embodiments, in order to improve the cleanliness of the liquid fuel delivered to the ejector chamber 11, the fuel delivery chamber 33 is provided with a filter membrane 39, and the needle valve 60 passes through the filter membrane 39.

[0037] In this embodiment, the burner head 10 is equipped with an ignition component.

[0038] Furthermore, the flame cap 12 is provided with spiral-shaped inclined flame holes 121. The multiple spiral-shaped inclined flame holes 121 can create a rotating flame combustion effect.

[0039] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. An automatic anti-clogging and anti-residual smoke liquid fuel burner, characterized in that, include: Burner head (10), oil tank (20), nozzle assembly (30), piston (40), spring (50) and needle valve (60); The burner head (10) is provided with an ejector chamber (11) and a flame cap (12). The nozzle assembly (30) is installed at the lower end of the ejector chamber (11). The nozzle assembly (30) is provided with a nozzle (31) and a nozzle seat (32). The nozzle seat (32) is provided with an oil delivery chamber (33) and a spring chamber (34). The piston (40) is telescopically movable in the oil delivery chamber (33). The needle valve (60) is fixed above the piston (40). The spring element (50) is installed in the spring chamber (34) to drive the piston (40) to move upward and to insert the needle valve (60) into the nozzle port (311) of the nozzle (31). The oil delivery chamber (33) is connected to an oil inlet pipe (35). When liquid fuel is delivered into the oil delivery chamber (33), the piston (40) can be moved downward and the needle valve (60) can be disengaged from the nozzle port (311).

2. The automatic anti-clogging and anti-residual smoke liquid fuel burner according to claim 1, characterized in that: A high-pressure pump (21) and an electric heating element (22) are provided between the oil inlet pipe (35) and the oil tank (20); the high-pressure pump (21) is used to pump liquid fuel from the oil tank (20) toward the nozzle assembly (30), and the electric heating element (22) is used to heat the oil inlet pipe (35).

3. The automatic anti-clogging and anti-residual smoke liquid fuel burner according to claim 2, characterized in that: The heating element (22) is a heating rod; the oil inlet pipe (35) is provided with a first winding section (351), which is wound around the heating element (22).

4. The automatic anti-clogging and anti-residual smoke liquid fuel burner according to claim 3, characterized in that: The oil inlet pipe (35) is provided with a second winding section (352), which is wound around the ejector cavity (11).

5. The automatic anti-clogging and anti-residual smoke liquid fuel burner according to claim 1, characterized in that: The diameter of the oil delivery chamber (33) is larger than the diameter of the spring chamber (34); a conical transition platform (36) is provided between the oil delivery chamber (33) and the spring chamber (34); the piston (40) is provided with a conical sealing surface (41) that is adapted to the conical transition platform (36).

6. The automatic anti-clogging and anti-residual smoke liquid fuel burner according to claim 1, characterized in that: The oil delivery chamber (33) is connected to an oil drain pipe (37), and an electromagnetic control valve (23) is provided between the oil drain pipe (37) and the oil tank (20).

7. The automatic anti-clogging and anti-residual smoke liquid fuel burner according to claim 1, characterized in that: The spring cavity (34) is provided with a pressure relief pipe (38).

8. The automatic anti-clogging and anti-residual smoke liquid fuel burner according to claim 1, characterized in that: The oil delivery chamber (33) is provided with a filter membrane (39), and the needle valve (60) passes through the filter membrane (39).

9. The automatic anti-clogging and anti-residual smoke liquid fuel burner according to claim 1, characterized in that: The burner head (10) is equipped with an ignition component.

10. The automatic anti-clogging and anti-residual smoke liquid fuel burner according to claim 1, characterized in that: The flame cap (12) is provided with a spiral-shaped inclined flame hole (121).

Images