Working condition adaptive oil gun head and atomizing oil gun

Abstract

This invention discloses an adaptive oil gun head and an atomizing oil gun. The oil gun head includes a transition joint, an atomizing plate, a regulating valve, a tension spring, and a reverse plate. The reverse plate is connected to the transition joint, and the atomizing plate is disposed and connected to the reverse plate. The top of the atomizing plate has an annular slit, and the regulating valve is disposed in the annular slit, which moves up and down along the annular slit. The atomizing plate has an atomizing gas channel communicating with the annular slit inside, and the reverse plate has a first chamber communicating with the atomizing gas channel inside. The tension spring is disposed in the atomizing gas channel and the first chamber. The lower end of the tension spring is fixedly connected to the reverse plate, and the upper end of the tension spring is fixedly connected to the regulating valve.

Description

Technical Field

[0001] This invention relates to an adaptive oil gun head and atomizing oil gun, belonging to the field of road construction machinery technology. Background Technology

[0002] Asphalt mixing plants are large-scale engineering equipment used to produce asphalt mixtures for road construction and maintenance. They are complex in composition and require significant investment per unit. The combustion and drying system is the most costly and crucial system for ensuring the quality of the asphalt mixture during operation. The atomizing oil gun is the core device for ensuring complete fuel combustion. Based on the actual needs of road construction and maintenance, asphalt mixing plants need to frequently adjust their output in real time during production. At low loads and low outputs, the cost-effectiveness of the asphalt mixing plant is relatively low; however, at high loads and high outputs, the burner fuel consumption can reach hundreds to thousands of kg / h. At this point, a large amount of fuel passes instantaneously through the oil gun, resulting in poor atomization. For fuel burners, the distribution range and particle size of the atomized fuel largely determine its flame shape. A large number of large oil droplets entering the combustion chamber instantaneously will cause the oil droplets to remain in the combustion chamber for a longer time, resulting in a thinner and longer flame. This may even cause the flame to extend into the drum drying zone and come into contact with the aggregate, resulting in incomplete combustion of some fuel. On the one hand, this wastes fuel and increases the cost of use. On the other hand, because fuel is not easy to bind, it will reduce the cohesiveness of the mixture, thereby reducing the road performance of the asphalt mixture. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide an adaptive oil gun head and atomizing oil gun, which solves the problems of existing technologies that cannot maintain good atomization performance for different production volumes and cannot adjust the flame length.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An adaptive oil gun head includes a transition joint, an atomizing plate, a regulating valve, a tension spring, and a reverse disc;

[0006] The reverse plate is connected to the transition joint, the atomizing plate is connected to the reverse plate, the top of the atomizing plate has an annular slit, the regulating valve is set in the annular slit, and the regulating valve moves up and down along the annular slit;

[0007] The atomizing plate has an atomizing gas channel that communicates with the annular seam, and the reverse plate has a first chamber that communicates with the atomizing gas channel. The atomizing gas channel and the first chamber are equipped with tension springs. The lower end of the tension spring is fixedly connected to the reverse plate, and the upper end of the tension spring is fixedly connected to the regulating valve.

[0008] Furthermore, the aforementioned regulating valve includes an extension and a sealing part, with the extension connected to the lower end of the sealing part and the extension connected to the upper end of the tension spring.

[0009] Furthermore, the lower end face of the aforementioned sealing part includes a sealing plane and a wedge-shaped rectifying section. The sealing plane and the root of the protrusion are located on the same plane. One end of the wedge-shaped rectifying section is tangent to the sealing plane, and the other end is tangent to the outer ring of the sealing part.

[0010] Furthermore, under the aforementioned low-load condition, the regulating valve's sealing surface contacts the atomizing plate under the action of the tension spring; as the working load increases, the tension spring is further stretched, and the atomized gas is ejected at high speed from the annular gap and distributed radially along the wedge-shaped rectifying tangent.

[0011] Furthermore, the aforementioned also includes a locking nut. The outer ring of the transition joint is provided with an external thread that is compatible with the locking nut. The locking nut is used to connect the atomizing plate and the reverse plate to the transition joint in sequence in the form of end face sealing.

[0012] Furthermore, the aforementioned atomizing plate cavity is also provided with a conical channel, which expands outward along the center of the atomizing plate.

[0013] Furthermore, the aforementioned atomizing plate is symmetrically provided with an oil-gas mixing channel and a fuel channel along the central axis, and the oil-gas mixing channel is connected to the atomizing gas channel and the fuel channel, respectively.

[0014] An adaptive atomizing oil gun includes an oil gun rod, an air inlet pipe, an oil inlet pipe, an outer pipe, and an adaptive oil gun head of any of the aforementioned components.

[0015] The oil gun rod is fitted inside the outer tube, with the oil gun rod located in the middle of the outer tube. The rear end of the outer tube is connected to the air inlet pipe, the rear end of the oil gun rod is connected to the oil inlet pipe, and the oil gun head is connected to the front end of the outer tube.

[0016] Furthermore, the aforementioned transition joint is also provided with an air inlet and an oil inlet. The air inlet is connected to the inner cavity of the outer tube, and the oil inlet is connected to the front end of the oil gun rod.

[0017] Furthermore, the aforementioned reverse disc also has a second chamber inside, which is connected to the first chamber and the air intake.

[0018] The beneficial effects achieved by this invention are as follows:

[0019] 1. By setting up a regulating valve and a tension spring, when the fuel atomization effect is good under low load and the flame length is short, the regulating valve is in a closed state under the action of the tension spring; as the production load increases, the regulating valve gradually opens under the action of atomizing gas pressure, and the atomizing gas flowing out from the annular gap between the regulating valve and the atomizing plate increases the radial shear force on the oil that has just been injected out of the fuel-gas mixing channel, thereby enhancing the atomization effect.

[0020] 2. The wedge-shaped rectifying section allows the oil mist to expand radially, making the oil mist distribution shorter and thicker. This facilitates the formation of a shorter and thicker flame, avoiding direct contact between the flame and the aggregate, which can lead to incomplete combustion of fuel oil, aggregate contamination, and poor performance of the mixture. Attached Figure Description

[0021] Figure 1 This is the initial state of the oil gun head of the present invention;

[0022] Figure 2 This is the high-load working state of the oil gun head of the present invention;

[0023] Figure 3 This is a diagram illustrating the structure of the atomizing oil gun of the present invention.

[0024] The meanings of the reference numerals in the diagram are as follows: 1-Fuel nozzle; 2-Fuel nozzle rod; 3-Air inlet pipe; 4-Fuel inlet pipe; 5-Outer pipe; 101-Transition joint; 1011-Air inlet hole; 1012-Fuel inlet hole; 102-Locking nut; 103-Atomizing plate; 1031-Atomizing gas passage; 1032-Circular seam; 1033-Fuel-air mixing passage; 1034-Fuel passage; 104-Regulating valve; 1041-Extension; 1042-Sealing surface; 1043-Sealing plane; 1044-Wedge-shaped rectifying section; 105-Tension spring; 106-Reverse disc; 1061-First chamber; 1062-Second chamber. Detailed Implementation

[0025] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other.

[0026] Example 1

[0027] This embodiment discloses an adaptive oil nozzle, such as... Figure 1 As shown, it includes a transition joint 101, a locking nut 102, an atomizing plate 103, a regulating valve 104, a tension spring 105, and a reversing disc 106.

[0028] The reverse plate 106 is mounted on the transition joint 101, and the atomizing plate 103 is mounted on the reverse plate 106. The outer ring of the transition joint 101 is provided with an external thread that is compatible with the locking nut 102. The atomizing plate 103 and the reverse plate 106 are sequentially connected to the transition joint 101 in the form of end face sealing by the locking nut 102.

[0029] The atomizing plate 103 has an atomizing gas channel 1031 inside, and an annular slit 1032 communicating with the atomizing gas channel 1031 at the top of the atomizing plate 103. A conical channel is also provided at the center of the atomizing plate, and the conical channel expands outward along the center of the atomizing plate 103. A fuel-air mixing channel 1033 and a fuel channel 1034 are also symmetrically provided along the central axis of the atomizing plate 103, and the fuel-air mixing channel 1033 and the fuel channel 1034 are connected.

[0030] The regulating valve 104 includes an extension 1041 and a sealing part 1042. The extension 1041 is connected to the lower end of the sealing part 1042. The lower end face of the sealing part 1042 includes a sealing plane 1043 and a wedge-shaped rectifying section 1044. The sealing plane 1043 and the root of the extension 1041 are located on the same plane. One end of the wedge-shaped rectifying section 1044 is tangent to the sealing plane 1043, and the other end is tangent to the outer edge of the sealing part 1042. The extension 1041 is disposed in the annular gap 1032. When the sealing plane 1043 is in contact with the upper end face of the atomizing plate 103, it can seal the annular gap 1032.

[0031] The reverse disc 106 has a first chamber 1061 communicating with the atomizing gas passage 1031. A tension spring 105 is installed in the atomizing gas passage 1031 and the first chamber 1061. The lower end of the tension spring 105 is fixedly connected to the reverse disc 106, and the upper end of the tension spring 105 is fixedly connected to the extension portion 1041. As the production load increases, the atomizing gas pressure increases, and the tension spring 105 is further stretched, allowing more atomizing gas to be sprayed from the conical passage 1032 to participate in fuel atomization.

[0032] The fuel used in the fuel burners of asphalt mixing plants is generally low-quality heavy residue oil containing many impurities. It is supplied with positive displacement oil pumps such as gear pumps, and the output oil pressure gradually increases with the load. To ensure atomization, the atomizing pressure should generally be at least 1 bar higher than the fuel oil pressure.

[0033] Under low-load conditions, the fuel flow rate is small, and the fuel pressure is also low. As long as the atomizing gas pressure is higher than the fuel pressure, good atomization can be achieved. However, as the load increases, the fuel flow rate increases significantly, and the proportion of fuel occupying the fuel-air mixing channel 1033 increases. This significantly reduces the key parameter (fuel-air ratio) that significantly affects atomization. At this point, simply supplying gas to the fuel-air mixing channel through the atomizing gas channel is no longer sufficient to guarantee good atomization. Because a large amount of fuel enters the combustion chamber instantaneously, unburned fuel droplets flow downstream with the airflow, making the flame thin and long. For fuel burners, the distribution range and particle size of the atomized fuel largely determine its flame shape.

[0034] By installing a regulating valve and a connected tension spring at the fuel nozzle that dynamically adjusts according to the atomizing air pressure, the atomization effect and fuel distribution under different operating conditions can be adjusted.

[0035] Based on the atomizing gas pressure and the structure of the regulating valve 104, the spring constant of the tension spring 105 is calculated to meet the usage requirements, so that when the atomizing gas pressure is low under low load ( Figure 1 As shown, to ensure atomization, the regulating valve 104 is closed under the combined action of the tension spring 105 and the atomizing gas. However, as the production load increases, the atomization effect becomes difficult to guarantee, and the flame shape becomes thinner and longer. The atomizing gas pressure is adjusted by the atomizing gas supply device, causing the tension spring 105 to be further stretched. The regulating valve 104 gradually opens, and the atomizing gas flows out through the annular gap between the regulating valve 104 and the atomizing plate 103. Figure 2 As shown, under the action of the wedge-shaped rectifier section of the regulating valve, the radial shear force is increased on the oil that has just been sprayed out of the oil-gas mixing channel, which enhances the atomization effect and makes the oil mist expand radially, making the oil mist shorter and thicker. This is conducive to forming a shorter and thicker flame, avoiding direct contact between the flame and the aggregate, which would otherwise cause problems such as incomplete combustion of fuel and aggregate contamination leading to poor road performance of the mixture.

[0036] Example 2

[0037] This embodiment discloses an adaptive atomizing oil gun, such as... Figure 3 As shown, the device includes the oil gun head 1, oil gun rod 2, air inlet pipe 3, oil inlet pipe 4, and outer pipe 5 as described in Embodiment 1. The oil gun rod 2 is fitted inside the outer pipe 5, and is located in the middle of the outer pipe. The rear end of the outer pipe 5 is connected to the air inlet pipe 3, and the rear end of the oil gun rod 2 is connected to the oil inlet pipe 4. The transition joint 101 is also provided with an air inlet 1011 and an oil inlet 1012. The air inlet 1011 communicates with the inner cavity of the outer pipe 5, and the oil inlet 1012 communicates with the oil gun rod 2. The reverse plate 106 is also provided with a second chamber 1062, which communicates with the first chamber 1061 and the air inlet 1011, respectively.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A work condition adaptive oil gun head, characterized in that, It includes a transition joint (101), an atomizing plate (103), a regulating valve (104), a tension spring (105), and a reverse plate (106). The reverse plate (106) is connected to the transition joint (101), the atomizing plate (103) is connected to the reverse plate (106), the top of the atomizing plate (103) is provided with an annular slit (1032), the regulating valve (104) is provided in the annular slit (1032), and the regulating valve (104) moves up and down along the annular slit (1032); The atomizing plate (103) has an atomizing gas channel (1031) communicating with the annular seam (1032) inside. The reverse disk (106) has a first chamber (1061) communicating with the atomizing gas channel (1031) inside. The atomizing gas channel (1031) and the first chamber (1061) are provided with tension springs (105). The lower end of the tension spring (105) is fixedly connected to the reverse disk (106), and the upper end of the tension spring (105) is fixedly connected to the regulating valve (104). The regulating valve (104) includes an extension (1041) and a sealing part (1042). The extension (1041) is connected to the lower end of the sealing part (1042), and the extension (1041) is connected to the upper end of the tension spring (105). The lower end face of the sealing part (1042) includes a sealing plane (1043) and a wedge-shaped rectifying section (1044). The sealing plane (1043) and the root of the protrusion (1041) are located on the same plane. One end of the wedge-shaped rectifying section (1044) is tangent to the sealing plane (1043), and the other end is tangent to the outer ring of the sealing part (1042).

2. The operating condition-adaptable oil gun head of claim 1, wherein, Under light load conditions, the regulating valve (104) is in contact with the atomizing plate (103) under the action of the tension spring (105); as the working load increases, the tension spring (105) is further stretched, and the atomized gas is ejected at high speed from the annular gap (1032) and distributed radially along the wedge-shaped rectification section (1044).

3. The adaptive oil nozzle according to claim 1, characterized in that, It also includes a locking nut (102), the outer ring of the transition joint (101) is provided with an external thread that is compatible with the locking nut (102), the locking nut (102) is used to connect the atomizing plate (103) and the reverse plate (106) sequentially to the transition joint (101) in the form of end face sealing.

4. The adaptive oil nozzle according to claim 1, characterized in that, The inner cavity of the atomizing plate (103) is also provided with a conical channel, which expands outward along the center of the atomizing plate (103).

5. The adaptive oil nozzle according to claim 1, characterized in that, The atomizing plate (103) is also symmetrically provided with an oil-gas mixing channel (1033) and a fuel channel (1034) along the central axis. The oil-gas mixing channel (1033) is connected to the atomizing gas channel (1031) and the fuel channel (1034) respectively.

6. A condition-adaptive atomizing oil gun, characterized in that, It includes a grease gun rod (2), an air inlet pipe (3), an oil inlet pipe (4), an outer pipe (5), and a working condition adaptive grease gun head as described in any one of claims 1-5; The oil gun rod (2) is sleeved inside the outer tube (5). The oil gun rod (2) is located in the middle part of the outer tube (5). The rear end of the outer tube (5) is connected to the air inlet pipe (3). The rear end of the oil gun rod (2) is connected to the oil inlet pipe (4). The oil gun head is connected to the front end of the outer tube (5).

7. The adaptive atomizing oil gun according to claim 6, characterized in that, The transition joint (101) is also provided with an air inlet (1011) and an oil inlet (1012). The air inlet (1011) is connected to the inner cavity of the outer tube (5), and the oil inlet (1012) is connected to the front end of the oil gun rod (2).

8. The adaptive atomizing oil gun according to claim 7, characterized in that, The reverse disk (106) is further provided with a second chamber (1062), which is connected to the first chamber (1061) and the air inlet (1011).

Images