Burner nozzle, burner lance, burner and bitumen station

Abstract

The present application relates to the field of asphalt production equipment, and provides a burner nozzle, a burner spray gun, a burner and an asphalt station, which comprise a spray head and a blocking assembly. The first end of the spray head is provided with a plurality of oil injection holes, and the second end of the spray head is used for being connected with a fuel supply device. The blocking assembly has a first position and a second position. When the blocking assembly is located at the first position, all the oil injection holes are fully opened, so that the oil injection amount can be increased to improve the flame intensity. When the blocking assembly is located at the second position, the blocking assembly can close part of the oil injection holes or shield part of the oil injection holes, so that the opening degree of the oil injection holes is reduced. At this time, the total flow area of the oil injection holes is reduced, and then the flow of the high-pressure gas used for atomization is also reduced. When the oil-gas ratio is the minimum oil-gas ratio, the fuel supply amount can be further reduced due to the reduction of the flow of the high-pressure gas, the effect of reducing the flame intensity is realized, and the situation that the controller controls the burner to be extinguished is prevented.

Description

Technical Field

[0001] This invention relates to the field of asphalt production equipment technology, and in particular to a burner nozzle, a burner spray gun, a burner, and an asphalt station. Background Technology

[0002] Currently, most burners used in asphalt plants use heavy oil as fuel and compressed air as the atomizing medium, so that the fuel is atomized in the burner nozzle and then sprayed out from the fuel injection hole of the burner nozzle.

[0003] During the period from initial ignition to material feeding at the asphalt plant, and while waiting for material feeding, it is necessary to reduce the flame intensity of the burner. Since the total flow area of ​​the injection nozzles remains constant, the only way to reduce the flame intensity is to decrease the oil supply from the oil pump.

[0004] However, to ensure adequate fuel atomization, a large amount of high-pressure gas is required for proper fuel atomization. When the fuel pump's supply decreases to a certain level, the fuel-air ratio becomes too low, resulting in insufficient fuel for combustion and ultimately causing the burner to shut down. Even when the fuel-air ratio is sufficient for continuous combustion, the fuel injection volume remains high, which can easily lead to excessively high exhaust gas temperatures. To ensure equipment safety, the controller will still shut down the burner. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0006] Therefore, the present invention provides a burner nozzle, comprising:

[0007] The nozzle has a first end with multiple injection holes and a second end for connection to a fuel supply device.

[0008] A blocking component is disposed inside the nozzle and has a first position and a second position. When the blocking component is in the first position, all the injection holes are open. When the blocking component is in the second position, the blocking component blocks part of the injection holes or reduces the opening of the injection holes.

[0009] According to the burner nozzle provided by the present invention, the sealing assembly includes:

[0010] A sealing element, wherein the sealing element is slidably connected to the nozzle;

[0011] A driving device, wherein the driving end of the driving device is disposed between the sealing member and the nozzle, and the driving device is used to drive the sealing member to move toward the first position;

[0012] A reset member is disposed between the sealing member and the nozzle, and the reset member is used to drive the sealing member to move to the second position.

[0013] According to the burner nozzle provided by the present invention, the sealing member includes a movable sleeve, the outer side wall of the movable sleeve is provided with a sliding part, the outer side wall of the sliding part is slidably and sealingly connected with the inner side wall of the nozzle, and the sliding direction is along the axial direction of the nozzle. The movable sleeve is provided with a fuel passage, and the first end of the nozzle and the second end of the nozzle are connected through the first fuel passage.

[0014] When the movable sleeve is in the second position, the end of the movable sleeve near the first end of the nozzle is in sealed contact with the inner surface of the first end of the nozzle, and the first fuel passage only connects the injection holes located within the coverage area of ​​the first fuel passage. When the movable sleeve is in the first position, the end of the movable sleeve near the first end of the nozzle is disengaged from the inner surface of the first end of the nozzle, and all the injection holes are connected to the first fuel passage.

[0015] According to the burner nozzle provided by the present invention, a first chamber is further provided between the outer wall of the movable sleeve and the inner wall of the nozzle. The driving device includes a gas pipeline, which is connected to the first chamber. When the gas pipeline introduces compressed gas into the first chamber, the movable sleeve moves to the first position.

[0016] According to the burner nozzle provided by the present invention, the reset member includes an elastic member disposed between one end of the movable sleeve near the second end of the nozzle and the second end of the nozzle. When the movable sleeve moves to the first position, the elastic member is compressed and stores force. When the pressure in the first chamber decreases, the elastic member pushes the movable sleeve to move to the second position.

[0017] The present invention also provides a burner nozzle, including a fuel supply device and a burner nozzle as described above, wherein the oil inlet end of the burner nozzle is connected to the oil outlet end of the fuel supply device.

[0018] According to the burner nozzle provided by the present invention, the fuel supply device includes:

[0019] The first sleeve, wherein the burner nozzle is disposed at the end of the first sleeve;

[0020] The second sleeve is disposed inside the first sleeve, and a first gas passage is formed between the second sleeve and the first sleeve. A second fuel passage is formed inside the second sleeve.

[0021] An atomizing assembly is disposed at one end of the second sleeve near the burner nozzle. The atomizing assembly has a third fuel passage and a second gas passage. The third fuel passage is used to connect the second fuel passage and the nozzle, and the second gas passage is used to connect the first gas passage and the nozzle. The gas passing through the second gas passage is used to atomize the fuel passing through the third fuel passage.

[0022] The present invention also provides a burner, including a burner nozzle as described above or a burner spray gun as described above.

[0023] The burner provided according to the present invention further includes:

[0024] An oil pump, wherein the oil outlet of the oil pump is connected to the oil inlet of the fuel supply device;

[0025] A reversing valve is provided on the gas pipeline, and the reversing valve includes an inlet channel and an exhaust channel. The inlet channel and the exhaust channel are selectively connected. When the inlet channel is connected, the gas pipeline can supply gas to the first chamber. When the exhaust channel is connected, the first chamber exhausts gas.

[0026] When the oil pressure of the oil pump is higher than the preset value, the air intake passage of the reversing valve is opened; when the oil pressure of the oil pump is lower than the preset value, the exhaust passage of the reversing valve is opened.

[0027] The present invention also provides an asphalt station, comprising a burner nozzle as described above, a burner spray gun as described above, or a burner as described above.

[0028] The burner nozzle provided by this invention includes a nozzle head and a sealing assembly disposed within the nozzle head. The first end of the nozzle head has multiple injection holes, and the second end of the nozzle head is used to connect to a fuel supply device, through which fuel supplied by the fuel supply device can be sprayed out. The sealing assembly has a first position and a second position. When the asphalt plant requires a higher flame intensity, the sealing assembly can be positioned in the first position, allowing all the injection holes to be open, thereby increasing the fuel injection volume and improving the flame intensity. During the period from ignition to feeding or while waiting for feeding, the sealing assembly can be positioned in the second position. In this position, the sealing assembly can close some of the injection holes or partially block them, reducing the opening degree of the injection holes. When some injection holes are closed or the opening degree of the injection holes is reduced, the total flow area of ​​the injection holes decreases, and consequently, the flow rate of the high-pressure gas used for atomization also decreases. When the oil-gas ratio is at the minimum oil-gas ratio that can ensure continuous combustion of the burner, the fuel supply can be further reduced due to the reduced flow rate of high-pressure gas, thereby further reducing the flame intensity and preventing the exhaust gas temperature from exceeding the warning value, which would cause the controller to shut down the burner.

[0029] Furthermore, in the burner spray gun, burner, and asphalt station provided by the present invention, since all are provided with the burner nozzles as described above, they have the same advantages as described above. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a cross-sectional view of the burner nozzle provided in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the movable sleeve and the nozzle rotatably connected according to an embodiment of the present invention;

[0033] Figure label:

[0034] 100. Nozzle; 110. Injection hole; 120. Second annular protrusion; 130. First air intake; 140. Guide cylinder; 150. Blocking part; 160. Third annular protrusion; 200. Moving sleeve; 210. First fuel passage; 220. First annular protrusion; 230. Actuating lever; 310. First chamber; 320. Second chamber; 330. Third chamber; 400. Gas pipeline; 500. Spring; 610. First sleeve; 611. Second air intake; 620. Second sleeve; 621. Second fuel passage; 630. End cap; 710. First gas passage; 720. Second gas passage; 810. First atomizing head; 811. Third fuel passage; 820. Second atomizing head; 821. Third air intake; 900. Reversing valve. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0036] The following is combined Figure 1 and Figure 2 The present invention describes a burner nozzle, a burner spray gun, a burner, and an asphalt station.

[0037] An embodiment of the present invention provides a burner nozzle, including a nozzle 100 and a sealing assembly.

[0038] The nozzle 100 is hollow inside, and its second end is open. The second end of the nozzle 100 is used for detachable connection with a fuel supply device, for example, by a threaded connection. The first end of the nozzle 100 can be a conical structure, and a plurality of fuel injection holes 110 are provided on the outer end face of the first end of the nozzle 100. The fuel injection holes 110 connect the inner and outer sides of the nozzle 100.

[0039] The sealing component is located inside the nozzle 100, and the sealing component can be switched between a first position and a second position.

[0040] When the sealing assembly is in the first position, all the injection holes 110 on the nozzle 100 are fully open, and all the injection holes 110 can spray fuel outwards. When the sealing assembly is in the first position, the total area of ​​the injection holes 110 is large, and a large amount of fuel can be injected. At this time, the burner nozzle can be used for high-fire conditions.

[0041] When the sealing component is in the second position, it can block part of the injection hole 110, allowing the unblocked injection hole 110 to spray fuel normally. Alternatively, the sealing component can block a portion of the injection hole 110 to reduce its opening. Regardless of the sealing method, the purpose is to reduce the total flow area of ​​the injection hole 110.

[0042] In related technologies, since the total flow area of ​​the injection orifice 110 cannot be adjusted, the only way to reduce the flame intensity is to decrease the fuel injection volume of the burner nozzle by reducing the fuel supply. However, to ensure that the fuel can be fully atomized, a large amount of high-pressure gas needs to be introduced. To ensure continuous combustion of the burner, the ratio of fuel to high-pressure gas needs to be higher than the minimum fuel-gas ratio. When the fuel-gas ratio is lower than the minimum fuel-gas ratio, the amount of fuel injected is too small to maintain combustion. Due to the large amount of high-pressure gas, the fuel injection volume remains large in order to keep the fuel-gas ratio from falling below the minimum fuel-gas ratio, which cannot reduce the flame intensity to a lower level. When there is no raw material input in the asphalt plant and the burner is running dry, there is a risk that the exhaust gas temperature will exceed the warning value. In this case, to ensure equipment safety, the controller will shut down the burner.

[0043] The burner nozzle provided in the embodiments of the present invention allows the sealing assembly to be switched to a second position when it is necessary to reduce the flame intensity. At this time, the total flow area of ​​the fuel injection hole 110 is reduced, thereby reducing the fuel injection volume. At the minimum fuel-air ratio, due to the reduction in fuel injection volume, the fuel injection volume can also be reduced accordingly, thereby allowing the burner to continue burning under a lower flame intensity state and preventing the exhaust gas temperature from becoming excessively high.

[0044] In some embodiments of the present invention, the sealing assembly includes a sealing element, a driving device, and a resetting element.

[0045] The sealing element is slidably connected to the nozzle 100, and can switch between a first position and a second position relative to the nozzle 100. When the sealing element is in the first position, all the oil injection holes 110 on the nozzle 100 are open, and all oil injection holes 110 can spray oil. When the sealing element is in the second position, it blocks part of the oil injection holes 110, or a portion of the oil injection holes 110, to reduce the opening of the oil injection holes 110. In other words, when the sealing element is in the second position, the total flow area of ​​the oil injection holes 110 is reduced.

[0046] The drive end of the drive device is located between the sealing component and the nozzle 100. When it is necessary to increase the flame intensity, the drive device can drive the sealing component to move to the first position.

[0047] The reset component is located between the sealing component and the nozzle 100. When it is necessary to reduce the flame intensity, the reset component can drive the sealing component to move to the second position.

[0048] It should be noted that the sliding connection between the sealing component and the nozzle 100 is not limited to linear or rotary motion.

[0049] In some embodiments of the present invention, the oil injection holes 110 can be divided into two groups. The axes of the two groups of oil injection holes 110 are both located on a conical surface with the axis of the nozzle 100 as the rotation axis. The diameter of the intersection line between the conical surface where the axis of the first group of oil injection holes is located and the end face of the first end of the nozzle 100 is smaller than the diameter of the intersection line between the conical surface where the axis of the second group of oil injection holes is located and the end face of the first end of the nozzle 100.

[0050] Furthermore, the distance between the intersection of the conical surface containing the axis of the first set of injection holes and the end face of the first end of the nozzle 100 and the intersection of the conical surface containing the axis of the second set of injection holes and the end face of the first end of the nozzle 100 is greater than the inner diameter of the injection hole 110.

[0051] The sealing component includes a movable sleeve 200, which is a cylindrical structure with a first fuel passage 210 inside. The movable sleeve 200 passes through the nozzle 100, and a sliding part is provided on the outer side of the movable sleeve 200 near the second end of the nozzle 100. The sliding part is a first annular protrusion 220, and the outer peripheral surface of the sliding part slides and seals against the inner surface of the nozzle 100. Thus, the first end and the second end of the nozzle 100 are connected through the first fuel passage 210 inside the movable sleeve 200.

[0052] The movable sleeve 200 is coaxially arranged with the nozzle 100, and the movable sleeve 200 slides along the axial direction of the nozzle 100. When it is necessary to reduce the flame intensity, the reset member drives the movable sleeve 200 to move towards the first end of the nozzle 100 until the end of the movable sleeve 200 makes sealing contact with the inner surface of the first end of the nozzle 100. At this time, the contact position between the end of the movable sleeve 200 and the inner surface of the first end of the nozzle 100 is located between the first set of oil injection holes and the second set of oil injection holes.

[0053] Since the second end of the nozzle 100 is connected to the first end of the nozzle 100 through the first fuel passage 210 of the movable sleeve 200, the fuel injection holes 110 located within the coverage area of ​​the movable sleeve 200 are connected to the first fuel passage 210. Therefore, fuel within the first fuel passage 210 cannot flow to the fuel injection holes 110 outside the coverage area of ​​the movable sleeve 200. In other words, when the movable sleeve 200 moves to the second position, only the first set of fuel injection holes can inject fuel; the second set of fuel injection holes cannot receive fuel and cannot inject fuel.

[0054] When it is necessary to increase the flame intensity, the drive device drives the movable sleeve 200 to move away from the first end of the nozzle 100 until the end of the movable sleeve 200 disengages from the inner side of the first end of the nozzle 100. At this time, the fuel through the first fuel passage 210 can be supplied to the two sets of injection holes 110 at the same time, and the fuel can be sprayed outward through the two sets of injection holes 110.

[0055] In some embodiments of the present invention, a second annular protrusion 120 is further provided on the inner side of the nozzle 100. The second annular protrusion 120 is located on the side of the first annular protrusion 220 near the first end of the nozzle 100, and the inner circumferential surface of the second annular protrusion 120 is in sliding sealing contact with the outer side of the movable sleeve 200. Thus, the first annular protrusion 220, the second annular protrusion 120, the inner side of the nozzle 100, and the outer side of the movable sleeve 200 form a closed first chamber 310.

[0056] The driving device may include a gas pipeline 400, and a first air inlet 130 is provided on the outer side of the nozzle 100. The first air inlet 130 connects the inner and outer sides of the first chamber 310, and the outlet end of the gas pipeline 400 is connected to the first air inlet 130.

[0057] When it is necessary to increase the flame intensity, the movable sleeve 200 needs to be moved to a first position away from the first end of the nozzle 100. At this time, compressed air can be introduced into the first chamber 310 through the gas pipeline 400 and the first air inlet 130. As the air pressure in the first chamber 310 increases, the high-pressure gas pushes the movable sleeve 200 towards the second end of the nozzle 100, so that the end of the movable sleeve 200 near the first end of the nozzle 100 is disengaged from the nozzle 100, thereby connecting both sets of fuel injection holes 110 with the first fuel passage 210 of the movable sleeve 200.

[0058] In some embodiments of the present invention, the reset member may include an elastic member, which may be a spring 500. A guide cylinder 140 is also provided inside the nozzle 100, the outer diameter of which is equal to the inner diameter of the movable sleeve 200. One end of the guide cylinder 140 near the second end of the nozzle 100 is fixedly connected to the inner wall of the nozzle 100, and the portion of the guide cylinder 140 connected to the nozzle 100 forms a blocking portion 150. One end of the guide cylinder 140 near the first end of the nozzle 100 is inserted into the movable sleeve 200, and the inner sidewall of the movable sleeve 200 near the second end of the nozzle 100 is in sealing sliding contact with the outer sidewall of the guide cylinder 140.

[0059] Spring 500 is sleeved on the outside of guide cylinder 140, and one end of spring 500 abuts against the end of movable sleeve 200 near the second end of nozzle 100, and the other end of spring 500 abuts against the side of the blocking part 150 of guide cylinder 140 near movable sleeve 200.

[0060] Thus, when compressed air is introduced into the first chamber 310, driving the movable sleeve 200 to move to the first position, the spring 500 is compressed and stores force. When the compressed air in the first chamber 310 is released and loses pressure, the spring 500 restores its deformation and releases its elastic force, driving the movable sleeve 200 to move to the second position.

[0061] In another embodiment of the present invention, the movable sleeve 200 is rotatably connected to the nozzle 100, a third annular protrusion 160 is provided on the inner sidewall of the nozzle 100, and a groove is provided on the inner circumferential surface of the third annular protrusion 160, the groove being a fan-shaped groove.

[0062] The outer peripheral surface of the movable sleeve 200 is in sliding sealing contact with the inner peripheral surface of the third annular protrusion 160. A toggle rod 230 is provided at the position corresponding to the groove on the outer peripheral surface of the movable sleeve 200. The outer side of the toggle rod 230 is in sliding sealing contact with the inner side of the groove. The toggle rod 230 divides the groove into a sealed second chamber 320 and a third chamber 330.

[0063] The first air inlet 130 on the nozzle 100 communicates with the second chamber 320, and the elastic element is disposed in the third chamber 330. When compressed air is introduced into the second chamber 320, the gas compression actuating rod 230 drives the movable sleeve 200 to rotate in the first direction to the first position. When the pressure is released in the second chamber 320, the elastic element drives the actuating rod 230 to rotate in the second direction to the second position.

[0064] Multiple sealing heads are provided at one end of the movable sleeve 200 near the first end of the nozzle 100, the number of sealing heads being less than the number of oil injection holes 110. When the movable sleeve 200 is in the first position, the sealing heads contact the inner surface of the first end of the nozzle 100. When the movable sleeve 200 is in the second position, the sealing heads block the corresponding oil injection holes 110. The blocked oil injection holes 110 cannot continue to spray oil, while the unblocked oil injection holes 110 can continue to spray oil.

[0065] Embodiments of the present invention also provide a burner nozzle, which includes a fuel supply device and a burner nozzle as described above, wherein the inlet end of the burner nozzle is connected to the outlet end of the fuel supply device. Because this burner nozzle is equipped with the burner nozzle described above, it has the same advantages as described above.

[0066] In some embodiments of the present invention, the fuel supply device includes a first sleeve 610, a second sleeve 620, and an atomizing assembly.

[0067] The first sleeve 610 is hollow inside, and the second end of the burner nozzle 100 is connected to the end of the first sleeve 610. For example, an external thread can be provided at the end of the first sleeve 610 that is connected to the nozzle 100, and an internal thread can be provided on the inner side of the second section of the nozzle 100, so that the nozzle 100 and the first sleeve 610 are threadedly connected.

[0068] An end cap 630 is provided at the end of the first sleeve 610 away from the nozzle 100. The end cap 630 and the first sleeve 610 can be connected by threads. A connecting hole is provided in the middle of the end cap 630. One end of the second sleeve 620 passes through the connecting hole, and the other end of the second sleeve 620 extends towards the nozzle 100.

[0069] The second sleeve 620 has a second fuel passage 621 inside. When the first sleeve 610 is connected to the second sleeve 620, a first gas passage 710 is formed between the outer side of the second sleeve 620 and the inner side of the first sleeve 610. A second air inlet 611 is provided on the outer side of the first sleeve 610, and the second air inlet 611 is used to introduce compressed air into the first gas passage 710.

[0070] The atomizing assembly includes a first atomizing head 810 and a second atomizing head 820.

[0071] The end of the first atomizing head 810 away from the nozzle 100 is connected to the end of the second sleeve 620 near the nozzle 100. A third fuel passage 811 is provided inside the first atomizing head 810, and the second fuel passage 621 communicates with the interior of the nozzle 100 through the third fuel passage 811.

[0072] The second atomizing head 820 is sleeved on the outside of the first atomizing head 810, and a second gas channel 720 is formed between the inner side of the second atomizing head 820 and the outer side of the first atomizing head 810. A third air inlet 821 is provided on the outer side of the second atomizing head 820, connecting the inner and outer sides of the second gas channel 720. The first gas channel 710 is connected to the second gas channel 720 through the third air inlet 821, and the second air inlet channel is connected to the inside of the nozzle 100.

[0073] When fuel passes through the second fuel passage 621 and the third fuel passage 811 and reaches the end of the first atomizing head 810 near the nozzle 100, compressed air passes through the second air inlet 611, the first gas passage 710, the third air inlet 821 and the second gas passage 720 and reaches the end of the second atomizing head 820 near the nozzle 100.

[0074] At the end of the first atomizing head 810 and the second atomizing head 820 near the nozzle 100, compressed air atomizes the fuel and then sprays the atomized fuel outward through the open fuel injection hole 110 on the nozzle 100.

[0075] Embodiments of the present invention also provide a burner, which includes the burner nozzle or the burner spray gun described above, and has the same advantages as described above due to the provision of the burner nozzle.

[0076] In some embodiments of the present invention, the burner further includes an oil pump and a reversing valve 900. A fuel inlet is provided at the end of the end cap 630 away from the first sleeve 610. The fuel inlet is connected to the second fuel passage 621 of the second sleeve 620. The oil outlet of the oil pump is connected to the fuel inlet and is used to introduce fuel into the second fuel passage 621.

[0077] A reversing valve 900 is installed on the gas pipeline 400. The reversing valve 900 includes an intake channel and an exhaust channel. The intake channel and the exhaust channel can be selectively connected. When the intake channel is connected, the gas pipeline 400 can supply gas to the first chamber 310. When the exhaust channel is connected, the first chamber 310 exhausts gas.

[0078] The oil pump and the reversing valve 900 are connected in communication. When it is necessary to increase the flame intensity, the output of the oil pump increases. When the oil pressure of the oil pump is higher than the preset value, the oil pump sends a connection signal to the reversing valve 900. The air intake channel of the reversing valve 900 is opened and the exhaust channel of the reversing valve 900 is closed. The air supply device inputs compressed air into the first chamber 310 through the gas pipeline 400, thereby driving the moving sleeve 200 to move to the first position, so that all the oil injection holes 110 are fully opened.

[0079] When it is necessary to reduce the flame intensity, the output of the oil pump decreases. When the oil pressure of the oil pump is lower than the preset value, the oil pump sends a shut-off signal to the switching valve, the air intake passage of the reversing valve 900 is closed, and the exhaust passage is opened. At this time, the reset member pushes the moving sleeve 200 to the second position, and the gas in the first chamber 310 is released through the exhaust passage of the reversing valve 900.

[0080] Embodiments of the present invention also provide an asphalt station equipped with the burner nozzle, burner spray gun or burner as described above. Due to the presence of the burner nozzle, it has the same advantages as described above.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A burner nozzle, characterized in that, include: The nozzle (100) has a plurality of injection holes (110) at its first end and is used to connect to a fuel supply device at its second end. A blocking assembly is disposed within the nozzle (100) and has a first position and a second position. When the blocking assembly is in the first position, the oil injection hole (110) is fully open. When the blocking assembly is in the second position, the blocking assembly blocks part of the oil injection hole (110) or reduces the opening of the oil injection hole (110). The sealing component includes: A sealing component, comprising a movable sleeve (200), wherein the outer side wall of the movable sleeve (200) is provided with a sliding part, the outer side wall of the sliding part is slidably and sealingly connected to the inner side wall of the nozzle (100), and the sliding direction is along the axial direction of the nozzle (100). A first fuel passage (210) is provided inside the movable sleeve (200), and the first end of the nozzle (100) and the second end of the nozzle (100) are connected through the first fuel passage (210). When the movable sleeve (200) is in the second position, the end of the movable sleeve (200) near the first end of the nozzle (100) is in sealed contact with the inner side of the first end of the nozzle (100), and the first fuel passage (210) only connects the injection holes (110) located within the coverage area of ​​the first fuel passage (210). When the movable sleeve (200) is in the first position, the end of the movable sleeve (200) near the first end of the nozzle (100) is disengaged from the inner side of the first end of the nozzle (100), and all the injection holes (110) are connected to the first fuel passage (210).

2. The burner nozzle according to claim 1, characterized in that, The blocking assembly includes: A driving device, wherein the driving end of the driving device is disposed between the sealing member and the nozzle (100), and the driving device is used to drive the sealing member to move to the first position; A reset member is disposed between the sealing member and the nozzle (100), and the reset member is used to drive the sealing member to move to the second position.

3. The burner nozzle according to claim 2, characterized in that, A first chamber (310) is provided between the outer wall of the movable sleeve (200) and the inner wall of the nozzle (100). The driving device includes a gas pipeline (400) which is connected to the first chamber (310). When the gas pipeline (400) introduces compressed gas into the first chamber (310), the movable sleeve (200) moves to the first position.

4. The burner nozzle according to claim 3, characterized in that, The reset component includes an elastic element, which is disposed between one end of the movable sleeve (200) near the second end of the nozzle (100) and the second end of the nozzle (100). When the movable sleeve (200) moves to the first position, the elastic element is compressed and stores force. When the pressure in the first chamber (310) decreases, the elastic element pushes the movable sleeve (200) to move to the second position.

5. A burner spray gun, characterized in that, It includes a fuel supply device and a burner nozzle as described in any one of claims 1 to 4, wherein the inlet end of the burner nozzle is connected to the outlet end of the fuel supply device.

6. The burner nozzle according to claim 5, characterized in that, The fuel supply device includes: The first sleeve (610) has the burner nozzle disposed at the end of the first sleeve (610); The second sleeve (620) is disposed inside the first sleeve (610), and a first gas passage (710) is formed between the second sleeve (620) and the first sleeve (610). A second fuel passage (621) is formed inside the second sleeve (620). An atomizing assembly is disposed at one end of the second sleeve (620) near the burner nozzle. The atomizing assembly is provided with a third fuel passage (811) and a second gas passage (720). The third fuel passage (811) is used to connect the second fuel passage (621) and the nozzle (100). The second gas passage (720) is used to connect the first gas passage (710) and the nozzle (100). The gas passing through the second gas passage (720) is used to atomize the fuel passing through the third fuel passage (811).

7. A burner, characterized in that, Includes the burner nozzle as described in any one of claims 1 to 4 or the burner spray gun as described in claim 5 or 6.

8. The burner according to claim 7, characterized in that, Also includes: An oil pump, wherein the oil outlet of the oil pump is connected to the oil inlet of the fuel supply device; A reversing valve (900) is provided on a gas pipeline (400), and the reversing valve (900) includes an inlet channel and an exhaust channel. The inlet channel and the exhaust channel are selectively connected. When the inlet channel is connected, the gas pipeline (400) can supply gas to the first chamber (310). When the exhaust channel is connected, the first chamber (310) exhausts gas. When the oil pressure of the oil pump is higher than the preset value, the air intake passage of the reversing valve (900) is opened; when the oil pressure of the oil pump is lower than the preset value, the exhaust passage of the reversing valve (900) is opened.

9. An asphalt station, characterized in that, Includes the burner nozzle as described in any one of claims 1 to 4, the burner spray gun as described in claim 5 or 6, or the burner as described in claim 7 or 8.

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