Anti-blocking steam sprayer

Abstract

The utility model discloses an anti-blocking steam sprayer, and belongs to the technical field of spraying. According to the anti-blocking steam sprayer, the expansion pipe penetrates through the interior of the spiral section, the inlet end of the expansion pipe is communicated with the tail end of the spiral section, the outlet end of the expansion pipe is connected with the spray head assembly, the expansion cavity is formed in the expansion pipe, and the inner diameter of the expansion cavity is larger than that of the tail end of the spiral section; therefore, precipitates are sprayed out by greater disturbance, the deposition amount of the precipitates is reduced, and blockage is not easy to occur. The expansion pipe is provided with the detachable connector, the spray head assembly is installed on the connector, when precipitate deposition occurs in the expansion cavity, the expansion cavity can be opened, sediment can be cleaned through an auxiliary tool, and therefore the pipeline is prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of spray mechanisms, and more specifically, to an anti-clogging steam sprayer. Background Technique

[0002] A steam sprayer uses combustion to heat an auxiliary agent, causing the auxiliary agent to vaporize and form fine water mist when sprayed out of the nozzle. To improve the thermal efficiency, a straight pipe section is provided in the middle of the spiral pipe in the existing solution.

[0003] Through actual use, it is found that due to the high temperature of the straight pipe section, the solubility of calcium, magnesium ions, etc. in the auxiliary agent decreases, and deposition is likely to occur. Therefore, the heating pipe with this structure is very easy to be clogged. After a period of use, the heating pipe needs to be replaced.

[0004] For example, a detachable steam sprayer disclosed in Patent ZL202320060822.3, its spiral pipe includes a spiral pipe tail end and a spiral pipe top end. A circular cover plate is provided on one side of the combustion pipe. The outer walls of the spiral pipe tail end and the spiral pipe top end penetrate through the inner wall of the circular cover plate, and it is taken out and replaced in its entirety by using the connection method between the spiral pipe and the circular cover plate.

[0005] Using this method has a high cost. For the deposition of calcium and magnesium ions, it can also be cleaned chemically, that is, a cleaning agent is introduced to react with the deposition. However, the cleaning effect of the cleaning agent is limited. Along with the high-frequency use of the steam sprayer, the deposition accumulates continuously, and after using for a period of time, it will still be clogged.

[0006] Therefore, how to avoid the clogging of the heating pipe and extend the service life of the heating pipe is still an unsolved problem in the industry at present. Content of the Utility Model

[0007] 1. Technical Problem to be Solved by the Utility Model

[0008] The purpose of the utility model is to overcome the deficiency that the heating pipe is easily clogged in the prior art, and provides an anti-clogging steam sprayer. In this solution, an expansion pipe with a larger diameter is arranged in the coil pipe, and the precipitates after the vaporization of the auxiliary agent can be more fully disturbed, reducing the deposition of the precipitates; and the expansion pipe can be opened for cleaning to avoid being completely clogged.

[0009] 2. Technical Solution

[0010] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0011] An anti-clogging steam sprayer of the utility model includes:

[0012] A combustion mechanism;

[0013] A blower, which is arranged on one side of the combustion mechanism and supplies the air required for combustion to the combustion mechanism when the blower works;

[0014] A combustion housing, which is arranged on the other side of the combustion mechanism. The combustion housing is hermetically connected to the combustion mechanism. A smoke exhaust port is arranged on the side of the combustion housing far from the combustion mechanism. A combustion chamber is formed inside the combustion housing, and the flame ejected by the combustion mechanism burns in the combustion chamber;

[0015] A coil pipe, which is arranged inside the combustion chamber and has a spiral section extending axially for a certain length. When working, the auxiliary agent can enter the coil pipe from the head end of the spiral section, be heated and vaporized, and flow out from the tail end of the spiral section;

[0016] An expansion pipe, at least part of which passes through the inside of the spiral section. Its inlet end is communicated with the tail end of the spiral section, and its outlet end is connected to a nozzle assembly; an expansion cavity is formed inside the expansion pipe, and the inner diameter of the expansion cavity is larger than the inner diameter of the tail end of the spiral section, forming a flow space for disturbing the precipitates;

[0017] The expansion pipe has a detachable connector, so that the expansion cavity is opened. The nozzle assembly is installed on the connector and is communicated with the expansion cavity, and the nozzle diameter in the nozzle assembly is smaller than the inner diameter of the expansion cavity.

[0018] Further, there is a gap for the flame to pass through between the outer wall of the expansion pipe and the spiral section, and the inner diameter of the expansion pipe is 10 - 28 mm.

[0019] Further, the connector has a threaded structure and is threadedly connected to the expansion pipe; or the connector and the expansion pipe are connected through a pipe joint.

[0020] Further, a cover plate is arranged on the side of the combustion housing far from the combustion mechanism, and the cover plate is used to cover the combustion chamber; the nozzle assembly includes an extension pipe and a nozzle. The extension pipe is arranged on the connector and passes through the cover plate to connect the nozzle;

[0021] Or, a cover plate is arranged on the side of the combustion housing far from the combustion mechanism, and the cover plate is used to cover the combustion chamber; the expansion pipe penetrates through the cover plate, the connector is located outside the combustion chamber, and the connector can be detachably connected under the condition that the cover plate remains connected.

[0022] Further, the expansion pipe is a multi-stage expansion pipe, and the inner diameter of the expansion pipe increases gradually from the inlet end to the outlet end.

[0023] Further, the coil pipe also has a straight pipe section with an integral structure, and the inlet end of the expansion pipe is communicated with the tail end of the spiral section through the straight pipe section.

[0024] Further, part of the expansion pipe is in a spiral structure, and the spiral structure is connected to the tail end of the spiral section and extends along the side of the spiral end close to the combustion mechanism.

[0025] An anti-clogging steam atomizer of the present utility model comprises:

[0026] A combustion mechanism, with a blower disposed on one side of the combustion mechanism. When the blower operates, it supplies the air required for combustion to the combustion mechanism.

[0027] A combustion housing, which is disposed on the other side of the combustion mechanism. A combustion chamber is formed inside the combustion housing, and the flame ejected by the combustion mechanism burns inside the combustion chamber.

[0028] A coil pipe, which is disposed inside the combustion chamber and has a spiral section extending axially for a certain length. During operation, the auxiliary agent can enter the coil pipe from the head end of the spiral section, be heated and vaporized, and flow out from the tail end of the spiral section.

[0029] An expansion pipe, which passes through the inside of the spiral section. Its inlet end is communicated with the tail end of the spiral section, and its outlet end is on the same side of the coil pipe as the head end of the spiral section, and a nozzle assembly is connected to the outlet end.

[0030] An expansion cavity is formed inside the expansion pipe, and the inner diameter of the expansion cavity is larger than the inner diameter of the tail end of the spiral section. The nozzle in the nozzle assembly is communicated with the expansion cavity.

[0031] One side of the expansion pipe close to the nozzle assembly has a detachable connector, so that the expansion cavity can be opened.

[0032] Further, the expansion pipe extends from one end of the spiral section to the other end, and the inner diameter of the spiral section near the combustion mechanism is larger than that of the other end.

[0033] Further, the combustion housing is formed by tightly coiling and welding an auxiliary agent pipe, and the head end of the spiral section is communicated with the auxiliary agent pipe.

[0034] Further, the number of turns of the spiral section is 8 - 18 turns, and the inner diameter of the spiral section is 3 - 6 mm; gaps are formed between the pipes of the spiral section.

[0035] Further, a cover plate is provided on the side of the combustion housing away from the combustion mechanism, and the cover plate is used to cover the combustion chamber; the nozzle assembly includes an extension pipe and a nozzle, the extension pipe is disposed on the connector and passes through the cover plate to connect the nozzle.

[0036] Or, a cover plate is provided on the side of the combustion housing away from the combustion mechanism, and the cover plate is used to cover the combustion chamber; the expansion pipe penetrates through the cover plate, and the connector can be detached while remaining connected to the cover plate.

[0037] Further, the nozzle assembly is also provided with a base liquid port, which is disposed adjacent to the nozzle, and the base liquid port is connected to a base liquid tank. When using the auxiliary agent for spraying, the base liquid is fused into the dispersed water mist.

[0038] 3. Beneficial effects

[0039] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects:

[0040] For the anti-clogging steam sprayer of the present utility model, the expansion pipe passes through the inside of the spiral section, its inlet end is communicated with the tail end of the spiral section, and the outlet end is connected to the nozzle assembly. An expansion cavity is formed in the expansion pipe, and the inner diameter of the expansion cavity is larger than the inner diameter of the tail end of the spiral section. When the liquid additive vaporizes, the expansion cavity provides a larger accommodation space, so that the precipitate is more disturbed and ejected, reducing the deposition amount of the precipitate and not easily getting clogged.

[0041] In this solution, the expansion pipe has a detachable connector, and the nozzle assembly is installed on the connector. When deposits appear in the expansion cavity, the expansion cavity can be opened. Due to the relatively large inner diameter of the expansion cavity, auxiliary tools can be used to clean the deposits, thereby avoiding clogging of the pipeline. Description of the Drawings

[0042] Figure 1 It is the structure of the steam sprayer in the existing solution;

[0043] Figure 2 It is a schematic diagram of an external structure of the anti-clogging steam sprayer;

[0044] Figure 3 It is a schematic diagram of an embodiment structure of the coil pipe and the expansion pipe;

[0045] Figure 4 It is a schematic diagram of a connection structure between the connector and the expansion pipe;

[0046] Figure 5 It is a schematic diagram of an implementation structure in which the connector is connected to the expansion pipe through an external thread;

[0047] Figure 6 It is a schematic diagram of an implementation structure in which the expansion pipe passes through the cover plate;

[0048] Figure 7 It is a schematic diagram of an implementation manner in which the nozzle assembly passes through the cover plate;

[0049] Figure 8 It is a schematic diagram of an implementation manner in which the expansion pipe adopts a two-stage structure;

[0050] Figure 9 It is a schematic diagram of the connection structure between the spiral section, the straight pipe section of the coil pipe and the expansion pipe.

[0051] Explanation of the reference numerals in the schematic diagram:

[0052] 1. Coil pipe;

[0053] 11. Spiral section; 12. Straight pipe section; 101. Head end of the spiral section; 102. Tail end of the spiral section; 103. Additive pipe;

[0054] 2. Expansion tube

[0055] 201. Inlet end; 202. Outlet end; 21. Expansion cavity; 22. Connector; 221. Hexagonal side; 222. Threaded section; 23. First-order tube; 24. Second-order tube

[0056] 3. Nozzle assembly

[0057] 31. Nozzle; 32. Extension tube; 33. Base liquid tube

[0058] 4. Combustion housing; 41. Cover plate

[0059] 51. Combustion mechanism; 52. Fan; 53. Handle Detailed implementation manner

[0060] To further understand the content of the present utility model, the present utility model will be described in detail in combination with the drawings and embodiments

[0061] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical substance significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the efficacy that the present invention can produce and the purpose that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation. The change or adjustment of their relative relationship, without substantial change in technical content, should also be regarded as the scope that the present invention can implement

[0062] Figure 1 Shown is an embodiment of an existing steam sprayer. It can be seen that its combustion housing is arranged on one side of the combustion mechanism, the heating tube is arranged in the combustion housing, and the straight tube section of the heating tube passes through the inside of the spiral section, that is, the first section and the last section of the coil are on the same side

[0063] Since the flame combustion is restricted by the combustion housing and the air is ejected from the middle of the combustion mechanism, the temperature in the middle of the flame will be higher than the temperature of the outer flame, and the temperature difference can reach more than 200 degrees Celsius. This kind of heating tube has better thermal efficiency. However, as the temperature increases, it is easier to vaporize in the straight tube section, which will form a large pressure and reduce the flow rate, and jet vibration is likely to occur at the nozzle. At the same time, the auxiliary agent used for atomization is generally a mixture of glycerol or ethylene glycol and water, which becomes steam and is ejected after being heated. However, some mixtures such as solid substances like calcium ions and magnesium ions will precipitate out. Part of these precipitates are ejected, and more will gradually accumulate, which is likely to cause the pipeline to be blocked

[0064] Figure 2 shows a schematic diagram of the external structure of an anti-clogging steam sprayer; Figure 3 shows a schematic diagram of the composition structure of the internal pipeline.

[0065] Figure 2 The steam sprayer in includes, as an implementation manner, a combustion mechanism 51, a blower 52, a combustion housing 4, and a coil pipe 1. The blower 52 is arranged on one side of the combustion mechanism 51. When the blower 52 operates, it provides the air required for combustion to the combustion mechanism 51.

[0066] The combustion housing 4 is arranged on the other side of the combustion mechanism 51, that is, the blower 52, the combustion mechanism 51, and the combustion housing 4 can be arranged substantially along the same axis. The combustion housing 4 is hermetically connected to the combustion mechanism 51. A smoke exhaust port is arranged on the side of the combustion housing 4 away from the combustion mechanism 51. A combustion chamber is formed inside the combustion housing 4, and the flame ejected by the combustion mechanism 51 burns in the combustion chamber.

[0067] When the steam sprayer is manually operated, it is necessary to prevent the flame from flowing out, and in order to ensure the thermal efficiency, the connection between the combustion housing 4 and the combustion mechanism 51 needs to be sealed. The pressure balance is achieved by using the smoke exhaust port, and the combustion flue gas is discharged outward. The side of the combustion housing 4 away from the combustion mechanism 51 can be sealed with a cover plate or form a semi-open structure, and its opening serves as the smoke exhaust port. There is a handle 53 on the upper side of the combustion housing 4 for hand-held operation.

[0068] A coil pipe 1 is arranged in the combustion chamber, as Figure 3 shown. As an implementation manner, the coil pipe 1 has a spiral section 1111 extending axially for a certain length. When working, the auxiliary agent can enter the coil pipe 1 from the head end 101 of the spiral section, be heated and vaporized, and flow out from the tail end 102 of the spiral section. The expansion pipe 2 passes through the inside of the spiral section 11. Its inlet end 201 is communicated with the tail end 102 of the spiral section, and the outlet end 202 is connected to the nozzle assembly 3; an expansion cavity 21 is formed inside the expansion pipe 2. The inner diameter of the expansion cavity 21 is larger than the inner diameter of the tail end 102 of the spiral section, forming a flow space for disturbing the precipitates.

[0069] In Figure 3 the implementation manner, the axial direction of the coil pipe 1 refers to the middle axis direction of the spiral structure it surrounds. A single-layer spiral pipe can be used, with 8 to 10 turns; when a multi-layer pipe or a size adjustment in the radial direction is adopted, the corresponding number of turns can be adjusted, such as 12 - 18 turns, so that the auxiliary agent can reach a state close to vaporization after passing through the coil pipe 1. Otherwise, the pressure is insufficient, and it is difficult to form fine water mist.

[0070] Since the diameter of the coiled pipe 1 is relatively small, the specific surface area of the auxiliary agent in the coiled pipe 1 that can be heated is relatively large, so the thermal efficiency is relatively good. When the diameter is increased, the specific surface area of the auxiliary agent that can be heated decreases, and the thermal efficiency decreases, which will affect the vaporization of the auxiliary agent. However, in this embodiment, the diameter of the nozzle is smaller than the inner diameter of the expansion chamber 21, and the auxiliary agent does not immediately spray out after entering the expansion chamber 21. The expansion chamber 21 has a larger space compared with the pipeline in the existing solution, so that the heating time of the auxiliary agent is increased. Preferably, the auxiliary agent enters the expansion pipe 2 in a gaseous state.

[0071] The auxiliary agent entering the expansion chamber 21 has a larger accommodation space, is more fully disturbed, and a nozzle 31 with a larger size can be used. The precipitates from the disturbance are mixed in the auxiliary agent and are more likely to be sprayed out, thereby reducing the deposition of precipitates and reducing the possibility of blockage. Even if deposition occurs, there is still sufficient space for the auxiliary agent to flow through.

[0072] As a more preferred embodiment, the expansion pipe 2 has a detachable connector 22, so that the expansion chamber 21 can be opened. The nozzle assembly 3 is installed on the connector 22. The diameter of the nozzle 31 in the nozzle assembly 3 is smaller than the inner diameter of the expansion chamber 21 and is communicated with the expansion chamber 21. After using for a period of time, the connector 22 can be opened to clean the expansion chamber 21 to avoid blockage.

[0073] In one embodiment, there is a gap for the flame to pass through between the outer wall of the expansion pipe 2 and the spiral section 11, and the inner diameter of the expansion pipe 2 is 10-28 mm.

[0074] The diameter of the coiled pipe 1 is generally within 6 mm. Using an expansion pipe 2 with a diameter of more than 10 mm can form a certain gap with the size of the coiled pipe 1, playing a role in expanding capacity and stabilizing pressure. If the size of the expansion pipe 2 is relatively large, such as 35 mm, the requirements for the combustion mechanism 51 are relatively high. Otherwise, the temperature that the expansion pipe 2 can be heated to is limited, and the temperature difference is relatively large. When the combustion temperature is relatively high, it can be used for the equipment mounted on the unmanned aerial vehicle without considering safety issues.

[0075] For a manually operated steam sprayer, the preferred inner diameter of the expansion pipe 2 is 10-28 mm. For example, 15 mm, 18 mm, 20 mm, etc. The expansion pipe 2 can be made of a thin-walled material with a thickness within 2.5 mm and is more easily heated.

[0076] Figure 4Shows an implementation of the connection between the connector 22 and the expansion pipe 2. In this solution, the connector 22 has a hexagonal side 221 and a threaded section 222. The outlet end 202 of the expansion pipe 2 has an internal thread, and the threaded section is threadedly connected to the outlet end 202 of the expansion pipe 2 to seal the outlet end 202. A slot is provided in the middle of the threaded section 222 for communicating with the nozzle 31. The provided hexagonal side facilitates the disassembly of the connector 22. In different solutions, it can also be two symmetric sides or a circular side with a rough surface.

[0077] In an anticipatable implementation, the nozzle assembly 3 includes a nozzle 31 and an extension pipe 32. The extension pipe 32 can be welded to the connector 22 or installed on the connector 22 by means of interference fit, bolt connection, etc. When bolt connection is adopted, the nozzle 31 can be disassembled from the connector 22. The extension pipe 32 referred to here is used to denote the extended connection structure of the nozzle 31. It can be a pipe integrated with the nozzle 31 or a pipe formed by means of welding or bolt connection for the connection and installation of the nozzle 31.

[0078] Figure 5 In another implementation, the threaded section of the connector 22 is an internal thread, that is, the connector 22 is a cylindrical structure, and an external thread is provided on the expansion pipe 2, and the two are threadedly connected. In this way, an end limiting surface is provided on the connector 22, and this limiting surface abuts against the end face of the expansion pipe 2, and at the same time has better sealing performance. Of course, the expansion pipe 2 can directly abut against the inner end face of the connector 22. In other implementations, the limiting surface can also be on the expansion pipe 2.

[0079] In other implementations, one of the connector 22 or the expansion pipe 2 can be provided with a pipe joint, and the other of them has a thread or a bayonet for connecting with the pipe joint.

[0080] Figure 6 Shows an installation method of the coil pipe. Since the expansion pipe 2 penetrates through the cover plate 41, it can be fixedly connected to the cover plate. The connector 22 is located outside the combustion chamber and can be connected to the expansion pipe 2 by bolts. When the expansion pipe 2 needs to be cleaned, the connection of the connector 22 can be directly released, and the expansion cavity 21 can be opened, so that the expansion cavity 21 can be cleaned while the cover plate remains connected. Therefore, adopting this solution, the cover plate 41 can be welded or detachably connected to the combustion housing 4. In addition, the cover plate 41 can completely cover the combustion housing 4, and a smoke exhaust port is separately opened on the combustion housing 4, or the cover plate 41 only covers a part of the area at the end of the combustion housing 4, leaving an end face smoke exhaust port.

[0081] In one embodiment, a detachable cover plate 41 is connected to the side of the combustion housing 4 away from the combustion mechanism 51. The cover plate 41 is used to cover the combustion chamber, and both the expansion pipe 2 and the first end 101 of the spiral section penetrate through the cover plate 41. When the coil pipe 1 is damaged or internal carbon deposits need to be cleaned, the connection of the cover plate 41 can be released to remove the entire coil pipe 1. The detachable manner of the cover plate 41 is threaded connection, or lugs or flanges are provided on the cover plate 41 and the combustion housing 4, and bolts are connected to the lugs or flanges.

[0082] In Figure 7 In the shown embodiment, the expansion pipe 2 is located inside the combustion chamber. The nozzle assembly 3 includes an extension pipe 32 and a nozzle 31. The extension pipe 32 is arranged on the connector 22 and passes through the cover plate 41 to connect the nozzle 31. In this way, the connection between the extension pipe 32 and the cover plate 41 can be released, otherwise the connector 22 cannot be disassembled.

[0083] In one implementation, the expansion pipe 2 penetrates through the cover plate 41. The first end 101 of the spiral section can pass through the side wall of the combustion housing 4, or a notch is reserved on the cover plate 41 for the first end 101 of the spiral section to pass through to connect the auxiliary agent pipe 103. When the expansion pipe 2 penetrates through the cover plate 41, it can be fixedly connected to the cover plate. The cover plate 41 can also be fixedly connected to the combustion housing 4.

[0084] For the expansion pipe 2, it can be a structure with a constant diameter. In other embodiments, it can be a variable diameter structure. For example, the expansion pipe 2 is a multi-stage expansion pipe 2, and the inner diameter of the expansion pipe 2 gradually increases from the inlet end 201 to the outlet end 202.

[0085] Figure 8 The shown expansion pipe 2 has a two-stage structure, including a first-stage pipe 23 and a second-stage pipe 24. The first-stage pipe 23 and the second-stage pipe 24 are coaxially arranged, and the inner diameter of the second-stage pipe 24 is larger than that of the first-stage pipe 23. The inner diameter of the first-stage pipe 23 is larger than the inner diameter of the tail end 102 of the spiral section, that is, larger than the inner diameter of the coil pipe 1. Since the coil pipe 1 is bent and not a complete circle, the inner diameter of the coil pipe 1 can be the inner diameter when the coil pipe 1 is in a circular state, or the maximum inner diameter after the deformation of the coil pipe 1, which can form an increase in the space volume between the coil pipe 1 and the expansion pipe 2.

[0086] By setting the expansion pipe 2 to a two-stage or three-stage structure, it can not only ensure good thermal efficiency but also avoid blockage.

[0087] Figure 9 In the shown embodiment, the coil pipe 1 also has a straight pipe section 12 with an integral structure. The inlet end 201 of the expansion pipe 2 is communicated with the tail end 102 of the spiral section through the straight pipe section 12. In specific implementation, the extending length of the straight pipe section 12 does not exceed the middle part of the spiral section 11, so that the expansion pipe 2 has sufficient dimensions for expansion and pressure balance.

[0088] In other embodiments, the expansion pipe 2 further has a spiral structure portion which is connected to the spiral section 11 of the coil pipe and extends along the side of the spiral section 11 close to the combustion mechanism 51, and then turns back and passes through the inside of the coil pipe 1 from the middle. In a preferred case, the inner diameter of the spiral portion of the expansion pipe 2 is 8 - 12 mm, and the inner diameter of the straight section of the expansion pipe 2 is further increased, for example, to 18 mm.

[0089] As a specific solution, the steam atomizer includes a combustion mechanism 51, a blower is arranged on one side of the combustion mechanism 51, and when the blower operates, it supplies the air required for combustion to the combustion mechanism 51; a combustion housing 4 is arranged on the other side of the combustion mechanism 51, the end of the combustion housing 4 has a cover plate 41, a combustion chamber is formed inside the combustion housing 4, and the flame ejected by the combustion mechanism 51 burns in the combustion chamber. The coil pipe 1 is arranged in the combustion chamber, the coil pipe 1 has a spiral section 11 extending axially for a certain length, and during operation, the auxiliary agent can enter the coil pipe 1 from the head end 101 of the spiral section, be heated and vaporized, and flow out from the tail end 102 of the spiral section. The expansion pipe 2 passes through the inside of the spiral section of the coil pipe, its inlet end 201 is communicated with the tail end 102 of the spiral section, and the outlet end 202 is on the same side of the coil pipe 1 as the head end 101 of the spiral section, and a nozzle assembly 3 is connected to the outlet end 202.

[0090] An expansion cavity 21 is formed inside the expansion pipe 2, the inner diameter of the expansion cavity 21 is larger than the inner diameter of the tail end 102 of the spiral section, forming a flow space for water scale deposition without blockage; the nozzle 31 in the nozzle assembly 3 is communicated with the expansion cavity 21; one side of the expansion pipe 2 close to the nozzle assembly 3 has a detachable connector 22, so that the expansion cavity 21 can be opened. A cover plate is provided on the side of the combustion housing 4 away from the combustion mechanism 51, and this cover plate is used to cover the combustion chamber; the expansion pipe 2 penetrates through the cover plate, and the detachable connector 22 can be disassembled while the cover plate remains connected.

[0091] The expansion pipe 2 at least partially coincides with the spiral section 11. As an embodiment, the expansion pipe 2 extends from one end of the spiral section 11 to the other end and extends out of the spiral section 11, which is convenient for connection with the cover plate. The inner diameter of the end of the spiral section 11 close to the combustion mechanism 51 is larger than that of the other end.

[0092] The inner diameter of the expansion pipe 2 is larger than that of the coil pipe 11, thereby forming a larger accommodation space. When the auxiliary agent heated by the coil pipe 1 vaporizes, the pressure of the gas with the same flow rate becomes smaller in the larger space, thereby reducing the pressure requirement for the external pump. When the difference in the inner diameter between the pressure reducing pipe and the coil pipe 11 is small, it cannot effectively block the structure and form an effective flow channel. In an alternative embodiment, the difference in the inner diameter can be 2.8 mm, 6 mm, 10 mm, etc., and the larger difference can be set to 14 mm, generally controlled within 3-15 mm. The outer diameter of the expansion pipe 2 is controlled within 20-28 mm, and there must be a gap for the flame to pass through between the outer wall of the pressure reducing pipe 2 and the coil pipe 11.

[0093] Combined with the above embodiments, the number of turns of the spiral section 11 is 10-16 turns, the inner diameter of the spiral section 11 is 3-5 mm, and a gap is formed between the pipes of the spiral section 11 so that the auxiliary agent reaches the vaporization state when passing through the coil pipe 1.

[0094] In some embodiments, in order to reduce the temperature at the handle 53 during manual operation, the auxiliary agent pipe 103 can be wound around the combustion housing 4 to use the auxiliary agent pipe 103 for heat insulation. In other embodiments, the auxiliary agent pipes 103 can be closely arranged, and the gaps between the auxiliary agent pipes 103 can be filled by welding or the like, and the combustion housing 4 can be formed by using the auxiliary agent pipes to reduce the temperature.

[0095] The above embodiments of different components or mechanisms can be combined as needed. In specific applications, for example, when it is applied to agricultural or forestry pesticide application operations, the nozzle assembly 3 is further provided with a base liquid pipe 33, which is attached to the nozzle 31, and the base liquid pipe is connected to the base liquid tank. When using the auxiliary agent for spraying, the base liquid is fused into the dispersed water mist. The base liquid can be the liquid medicine to be applied.

[0096] The above schematically describes the present invention and its embodiments. This description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural forms and embodiments to this technical solution without creative work without departing from the spirit of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. An anti-clogging steam sprayer, characterized in that: include: Combustion mechanism; The fan is arranged on one side of the combustion mechanism, and when the fan is working, it provides the combustion mechanism with air required for combustion; A combustion shell is arranged on the other side of the combustion mechanism, the combustion shell is closed and connected with the combustion mechanism, a smoke exhaust port is arranged on the side of the combustion shell away from the combustion mechanism, a combustion chamber is formed in the combustion shell, and the flame ejected by the combustion mechanism burns in the combustion chamber; The coil is arranged in the combustion chamber and has a spiral section extending a certain length in the axial direction. When working, the additive can enter the coil from the head end of the spiral section, be heated and vaporized, and flow out from the tail end of the spiral section; An expansion tube, wherein at least part of the expansion tube passes through the interior of the spiral section, the inlet end of the expansion tube is connected to the tail end of the spiral section, and the outlet end is connected to the nozzle assembly; an expansion cavity is formed in the expansion tube, and the inner diameter of the expansion cavity is larger than the inner diameter of the tail end of the spiral section, forming a flow space for the disturbance of the precipitate; The expansion tube has a detachable connector so that the expansion cavity is opened. The nozzle assembly is installed on the connector and communicated with the expansion cavity, and the nozzle diameter in the nozzle assembly is smaller than the inner diameter of the expansion cavity.

2. The anti-clogging steam sprayer according to claim 1, characterized in that: There is a gap between the outer wall of the expansion tube and the spiral section for the flame to pass through, and the inner diameter of the expansion tube is 10-28 mm.

3. A steam sprayer according to claim 1, characterized in that: The connector has a threaded structure and is threadedly connected to the expansion pipe; or the connector is connected to the expansion pipe through a pipe joint.

4. The anti-clogging steam sprayer according to claim 3, characterized in that: A cover plate is provided on one side of the combustion housing away from the combustion mechanism, and the cover plate is used to cover the combustion chamber; the nozzle assembly includes an extension pipe and a nozzle, and the extension pipe is arranged on the connecting head and passes through the cover plate to connect the nozzle; Alternatively, a cover plate is provided on the side of the combustion shell away from the combustion mechanism, and the cover plate is used to cover the combustion chamber; the expansion tube passes through the cover plate, and the connecting head is located outside the combustion chamber, and the connecting head can be removed while the cover plate remains connected.

5. The anti-clogging steam sprayer according to claim 1, characterized in that: The expansion pipe is a multi-stage expansion pipe, and the inner diameter of the expansion pipe increases step by step from the inlet end to the outlet end.

6. The anti-clogging steam sprayer according to claim 1, characterized in that: The coiled pipe also has a straight pipe section of an integrated structure, and the inlet end of the expansion pipe is connected with the tail end of the spiral section through the straight pipe section.

7. The anti-clogging steam sprayer according to claim 1, characterized in that: The expansion pipe part is a spiral structure, which is connected to the tail end of the spiral section and extends along a side of the spiral end close to the combustion mechanism.

8. An anti-clogging steam sprayer, characterized in that: include: The fan is arranged on one side of the combustion mechanism, and when the fan is working, it provides the combustion mechanism with air required for combustion; A combustion shell, which is arranged on the other side of the combustion mechanism, and a combustion chamber is formed in the combustion shell, and the flame ejected by the combustion mechanism burns in the combustion chamber; The coil is arranged in the combustion chamber and has a spiral section extending a certain length in the axial direction. When working, the additive can enter the coil from the head end of the spiral section, be heated and vaporized, and flow out from the tail end of the spiral section; The expansion pipe passes through the spiral section, the inlet end of the expansion pipe is connected with the tail end of the spiral section, the outlet end and the head end of the spiral section are located on the same side of the coil, and the outlet end is connected to the nozzle assembly; An expansion cavity is formed in the expansion tube, and the inner diameter of the expansion cavity is larger than the inner diameter of the tail end of the spiral section; the nozzle in the nozzle assembly is connected to the expansion cavity; The expansion tube has a detachable connector on one side close to the nozzle assembly, so that the expansion cavity can be opened.

9. The anti-clogging steam sprayer according to claim 8, characterized in that: The expansion tube extends from one end of the spiral section to the other end, and the inner diameter of one end of the spiral section close to the combustion mechanism is larger than the inner diameter of the other end.

10. The anti-clogging steam sprayer according to claim 8, characterized in that: The combustion shell is formed by welding and tightly coiling the auxiliary agent tube, and the head end of the spiral section is connected to the auxiliary agent tube.

11. The anti-clogging steam sprayer according to claim 8, characterized in that: The number of turns of the spiral section is 8 to 18, the inner diameter of the spiral section is 3 to 6 mm, and gaps are formed between the pipes of the spiral section.

12. The anti-clogging steam sprayer according to claim 11, characterized in that: A cover plate is provided on one side of the combustion housing away from the combustion mechanism, and the cover plate is used to cover the combustion chamber; the nozzle assembly includes an extension pipe and a nozzle, and the extension pipe is arranged on the connecting head and passes through the cover plate to connect the nozzle; Alternatively, a cover plate is provided on the side of the combustion shell away from the combustion mechanism, and the cover plate is used to cover the combustion chamber; the expansion pipe passes through the cover plate, and the connector can be removed while the cover plate remains connected.

13. The anti-clogging steam sprayer according to claim 12, characterized in that: The nozzle assembly is also provided with a base liquid port, which is attached to the nozzle and connected to the base liquid tank. When the auxiliary agent is sprayed, the base liquid is integrated into the diffused water mist.

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