Pressure reduction type sprayer and heating pipe

Abstract

The utility model discloses a depressurization type sprayer and a heating pipe, and belongs to the field of spraying devices. The sprayer comprises a heating pipe, a combustion shell and a combustion mechanism, the heating pipe is installed in the combustion shell, and the combustion mechanism is arranged at one end of the combustion shell; the heating pipe comprises a coil pipe and a depressurization pipe, the depressurization pipe is arranged in a spiral structure defined by the coil pipe, the inlet end of the depressurization pipe is communicated with the tail end of the coil pipe, and the outlet end of the depressurization pipe is connected with a spray head assembly; the inner pipe diameter of the pressure reducing pipe is larger than that of the coil pipe, the difference value between the inner pipe diameter of the pressure reducing pipe and the inner pipe diameter of the coil pipe ranges from 3 mm to 15 mm, the outer wall pipe diameter of the pressure reducing pipe is not larger than 38 mm, and a gap allowing flame to penetrate through is formed between the outer wall of the pressure reducing pipe and the coil pipe. After the auxiliary agent is vaporized in the pressure reducing pipe, the pipe diameter of the pressure reducing pipe is enlarged, so that the required pumping pressure can be reduced; in addition, the relatively large pipe diameter is not prone to blockage, and normal work of the heating pipe is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of spraying devices, and more specifically, to a step-down sprayer and a heating pipe. Background Art

[0002] Steam sprayers have good atomization effects and use less liquid medicine, so they are gradually popularized in agricultural production.

[0003] In an existing steam sprayer, such as the applicant's prior patent CN218925075U, a spiral pipe of the steam sprayer is installed inside a combustion pipe. The spiral pipe includes a spiral pipe tail end and a spiral pipe top end. The spiral pipe tail end passes through the inner diameter of the spiral pipe, thereby reducing its internal space and improving the thermal efficiency of the spiral pipe. In addition, in this solution, the spiral pipe can be completely taken out of the device for cleaning, so the opening method of the device is convenient and fast.

[0004] The focus of this patent is to solve the problem of cleaning the existing coiled pipes after blockage, that is, cleaning the carbon deposits formed after combustion on the surface of the coiled pipes. When the inside is blocked, the spiral pipe may be replaced only, which is convenient for disassembly operation. At the same time, new problems are also brought.

[0005] Since the temperature in the middle is relatively high when the flame in the coiled pipe burns, the straight pipe section is heated more concentratedly, which will cause the internal liquid water to quickly vaporize. However, the spray flow rate of the nozzle is limited, so a pump with a relatively high power needs to be used for operation. This not only increases the cost, but also generates relatively high noise, which is harmful to the operating and construction personnel.

[0006] Therefore, how to reduce the dependence of the spiral pipe on the high-pressure pump without reducing the steam atomization effect is a difficult problem faced at present. Summary of the Utility Model

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

[0008] The purpose of the utility model is to overcome the problem that the spiral pipe has relatively high requirements for pumping pressure in the prior art, and provides a step-down sprayer and a heating pipe. The sprayer adopting this solution can avoid scaling through the expansion of the step-down pipe, thereby ensuring the normal operation of the heating pipe and reducing the pressure requirements for the external auxiliary agent pump.

[0009] 2. Technical Solution

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

[0011] A step-down sprayer of the utility model includes a heating pipe, a combustion housing and a combustion mechanism. The heating pipe is installed inside the combustion housing, and the combustion mechanism is arranged at one end of the combustion housing for heating the heating pipe; the heating pipe includes:

[0012] A coil pipe, which is wound in a spiral structure. One end of the coil pipe far from the combustion mechanism is the head end of the coil pipe, which is used to connect the auxiliary agent pipe, and one end of the coil pipe close to the combustion mechanism is the tail end of the coil pipe;

[0013] A pressure-reducing pipe, which is arranged inside the spiral structure surrounded by the coil pipe. The inlet end of the pressure-reducing pipe is communicated with the tail end of the coil pipe, and a nozzle assembly is connected to the outlet end of the pressure-reducing pipe;

[0014] The inner diameter of the pressure-reducing pipe is larger than that of the coil pipe, and the difference is 3-15 mm, and the outer diameter of the pressure-reducing pipe is not larger than 32 mm. A gap for the flame to pass through is formed between the outer wall of the pressure-reducing pipe and the coil pipe.

[0015] Furthermore, the wall thickness of the pressure-reducing pipe is 0.3-3.5 mm, and the outer diameter of the pressure-reducing pipe is 16-34 mm.

[0016] Furthermore, the head end of the coil pipe is bent at the end position of the combustion housing and extends to the outside of the combustion housing; the head end of the coil pipe extends out from the end face or side wall of the combustion housing;

[0017] The coil pipe is conical, the inner diameter of the end close to the combustion mechanism is larger than that of the other end, and a gap is formed between the pipelines of the coil pipe.

[0018] Furthermore, the coil pipe includes a spiral section and a straight pipe section. The tail end of the coil pipe bends and extends into the spiral section to form a straight pipe section, and the straight pipe section is communicated with the pressure-reducing pipe;

[0019] The length of the pressure-reducing pipe is not less than 40 mm.

[0020] Furthermore, the pressure-reducing pipe is distributed in a stepped manner to form a plurality of stepped pipes with different diameters, and the diameters of the stepped pipes increase from the inlet end to the outlet end.

[0021] Furthermore, the nozzle assembly includes a connector and a nozzle. One side of the connector is detachably connected to the pressure-reducing pipe, the nozzle is arranged on the other side of the connector, and the nozzle is communicated with the pressure-reducing pipe.

[0022] Furthermore, the connector is threadedly connected to the pressure-reducing pipe. An internal thread or an external thread section is arranged on the connector, and an external thread or an internal thread is arranged on the corresponding pressure-reducing pipe.

[0023] Furthermore, the nozzle is installed on the connector; or,

[0024] An extension pipe is installed on the connector. The extension pipe is a straight pipe or a bent pipe, and a nozzle is installed at the end of the extension pipe.

[0025] A heating pipe of a sprayer according to the present invention, the heating pipe includes:

[0026] The coiled pipe is in a spiral structure. One end of the coiled pipe is the head end of the coiled pipe, which is used to connect the auxiliary agent pipe; the other end of the coiled pipe is the tail end of the coiled pipe, and the tail end of the coiled pipe is bent inward.

[0027] The pressure reducing pipe is arranged inside the spiral structure surrounded by the coiled pipe. The inlet end of the pressure reducing pipe is communicated with the tail end of the coiled pipe, and a nozzle assembly is arranged at the outlet end of the pressure reducing pipe.

[0028] The inner diameter of the pressure reducing pipe is larger than that of the coiled pipe, and the difference is 3 - 15 mm. Moreover, the outer diameter of the pressure reducing pipe is not larger than 32 mm, and a gap for the flame to pass through is formed between the outer wall of the pressure reducing pipe and the coiled pipe.

[0029] The nozzle assembly includes a connector and a nozzle. One side of the connector is detachably connected to the pressure reducing pipe, the other side of the connector is provided with the nozzle, and the nozzle is communicated with the pressure reducing pipe.

[0030] Furthermore, the inner diameter of the nozzle is smaller than the inner diameter of the pressure reducing pipe, and the nozzle extends outside the spiral structure of the coiled pipe.

[0031] The outlet end of the pressure reducing pipe is provided with a threaded structure, and the connector is provided with a threaded section that matches the threaded structure.

[0032] Furthermore, the pressure reducing pipe is distributed in a stepped manner and at least includes a connected first - order pipe and a second - order pipe. The first - order pipe is communicated with the tail end of the coiled pipe, and the second - order pipe is connected to the nozzle assembly; the diameter of the second - order pipe is larger than that of the first - order pipe.

[0033] Furthermore, the nozzle is installed on the connector; or,

[0034] An extension pipe is installed on the connector. The extension pipe is a straight pipe or a bent pipe, and a nozzle is installed at the end of the extension pipe.

[0035] Furthermore, the end face of the connection end of the pressure reducing pipe and the coiled pipe is closed, and the tail end of the coiled pipe is connected to the side wall of the pressure reducing pipe.

[0036] Furthermore, the coiled pipe includes a spiral section and a straight pipe section. The tail end of the coiled pipe bends and extends inward into the spiral section to form a straight pipe section, and this straight pipe section is communicated with the end face of the pressure reducing pipe.

[0037] Furthermore, the outer diameter of the pressure reducing pipe is 16 - 30 mm, and the inner diameter is 12 - 26 mm; the length of the pressure reducing pipe is not less than 40 mm.

[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 sprayer of the present utility model, a pressure reducing pipe is connected to the coil pipe, and the pressure reducing pipe is arranged inside the spiral structure. The diameter of the pressure reducing pipe is larger than that of the coil pipe. Then, the coil pipe can be used to quickly raise the temperature of the auxiliary agent. After vaporizing in the pressure reducing pipe, the enlarged diameter of the pressure reducing pipe can reduce the required pumping pressure. In addition, the relatively large diameter is not easily blocked, ensuring the normal operation of the heating pipe.

[0041] In addition, by controlling the difference in the inner diameter dimensions of the pressure reducing pipe and the coil pipe within a certain range, on the one hand, it can use the enlarged diameter to reduce pressure; on the other hand, within this range, the pressure reducing pipe can receive the heat transferred by flame heating to avoid insufficient vaporization. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of an implementation structure of the sprayer;

[0043] Figure 2 It is a schematic diagram of an implementation structure of the heating pipe;

[0044] Figure 3 It is a schematic diagram of the combined structure of the coil pipe section and the straight pipe section;

[0045] Figure 4 It is a schematic diagram of the pressure reducing pipe adopting a two - stage stepped structure;

[0046] Figure 5 It is a schematic diagram of the connection between the nozzle assembly and the pressure reducing pipe;

[0047] Figure 6 It is a schematic diagram of another implementation structure of the nozzle assembly.

[0048] Explanation of the reference numerals in the schematic diagrams:

[0049] 1. Coil pipe; 11. Spiral section; 12. Straight pipe section; 101. Tail end of the coil pipe; 102. Head end of the coil pipe; 103. Auxiliary agent pipe;

[0050] 2. Pressure reducing pipe; 201. Inlet end; 202. Outlet end; 21. First - order pipe; 22. Second - order pipe;

[0051] 3. Nozzle assembly; 31. Connector; 32. Nozzle; 33. Threaded section; 34. Extension pipe;

[0052] 4. Combustion housing;

[0053] 5. Combustion mechanism;

[0054] 6. Handle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0055] 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.

[0056] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of implementation. The change or adjustment of their relative relationship should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0057] When using existing sprayers, calcium and magnesium ions in water are more likely to precipitate and adhere to the inner wall of the spiral tube, which will soon be blocked, especially in the straight tube section, where the inner wall of the entire axial length will be blocked. This will reduce heat conduction on the one hand, and on the other hand, since the through-hole area of ​​the spiral tube becomes smaller, the additive pump is required to provide a larger pressure to ensure normal operation. This makes the spiral tube a consumable and needs to be replaced constantly.

[0058] In some technologies, there are also solutions to increase the size of the spiral tube to avoid clogging after scaling. However, for steam sprayers, most of them are manually operated, so the volume and weight of the entire device are limited. If the size of the spiral tube is increased, the overall volume will be larger, which is not suitable for steam sprayers. In addition, when the size of the spiral tube is increased, the thermal efficiency will be reduced, which will also affect the atomization effect.

[0059] Combination Figure 1 The provided pressure reduction sprayer includes a heating tube, a combustion shell 4 and a combustion mechanism 5. The heating tube is installed in the combustion shell 4. The combustion mechanism 5 is arranged at one end of the combustion shell 4 and is used to heat the heating tube. The end of the combustion shell 4 connected to the combustion mechanism 5 is closed. During operation, the combustion mechanism 5 will spray a protective flame into the combustion shell to heat the heating tube. The heating tube is used to be connected to an external auxiliary agent box, and the auxiliary agent in the auxiliary agent box is pumped into the heating tube through an auxiliary agent pump. The liquid in the heating tube is heated and vaporized rapidly, and mist is sprayed outward through the nozzle on the heating tube. While spraying, the agent is dissolved, so that crops or trees can be sprayed.

[0060] Combination Figure 2, as an embodiment of the heating pipe, it includes a coiled pipe 1 and a pressure-reducing pipe 2. The coiled pipe 1 is wound in a spiral structure. One end of the coiled pipe 1 away from the combustion mechanism 5 is the head end 102 of the coiled pipe, which is used to connect the auxiliary agent pipe 103. One end of the coiled pipe 1 close to the combustion mechanism 5 is the tail end 101 of the coiled pipe. The auxiliary agent flowing into the auxiliary agent pipe 103 can flow from the head end 102 of the coiled pipe to the tail end 101 of the coiled pipe.

[0061] The pressure-reducing pipe 2 is arranged inside the spiral structure surrounded by the coiled pipe 1. The inlet end 201 of the pressure-reducing pipe 2 is communicated with the tail end 101 of the coiled pipe. A spray head assembly 3 is connected to the outlet end 202 of the pressure-reducing pipe 2. The spray head assembly 3 has a nozzle, and high-temperature and high-pressure gaseous water can be sprayed out from the nozzle to form a dispersed water mist. The head end 102 of the coiled pipe is bent at the end position of the combustion housing 4 and extends to the outside of the combustion housing 4. The head end 102 of the coiled pipe extends out from the end face or side wall of the combustion housing 4.

[0062] As Figure 2 shown in the implementation structure of a heating pipe, the pressure-reducing pipe 2 is arranged substantially coaxially with the spiral structure of the coiled pipe 1. The pressure-reducing pipe 2 penetrates through the spiral structure. The end face of the inlet end 201 of the pressure-reducing pipe 2 is closed, and the tail end 101 of the coiled pipe is connected to the side wall of the pressure-reducing pipe 2.

[0063] The inner diameter of the pressure-reducing pipe 2 is larger than the inner diameter of the coiled pipe 1, so as to form a larger accommodation space. When the auxiliary agent is vaporized after being heated by the coiled pipe, the pressure of the same flow of gas becomes smaller in a larger space, thereby reducing the pressure requirement for the external pump. When the difference between the inner diameter of the pressure-reducing pipe 2 and the inner diameter of the coiled pipe 1 is small, it cannot effectively block the structure to form an effective flow channel. In an optional embodiment, the difference in the inner diameter can be 2.8 mm, 6 mm, 10 mm, etc. The larger difference can be set to 14 mm, generally controlled within 3 - 15 mm. However, it should be noted that the outer diameter of the pressure-reducing pipe 2 is not greater than 32 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 coiled pipe 1.

[0064] In the existing spiral pipe in the existing solution, the inner diameter size is generally about 4 - 6 mm. Under normal circumstances, it can work normally under a certain pressure. However, when a straight pipe is arranged inside the spiral pipe, due to the higher temperature of the middle flame, the solubility of salts such as calcium and magnesium ions decreases, and it is easier to precipitate. Therefore, the precipitation gradually accumulates in the straight pipe section, resulting in a further reduction of the internal space. If gaseous water is required to pass through, a greater pressure is needed.

[0065] After setting the pressure-reducing pipe 2 with a larger pipe diameter, this problem can be effectively solved. The accumulation of sediment within a short period will not directly affect the steam output. Moreover, when the pressure-reducing pipe 2 is adopted, the nozzle diameter can also be larger, and some of the precipitated crystals can be directly discharged. However, at the same time, when the pipe diameter increases, the unit contact area with the flame decreases, and the thermal efficiency decreases. If the pipe diameter is too large, the internal additives will not be able to reach a certain pressure, resulting in insufficient spraying power and affecting the atomization effect. Therefore, in this embodiment, the inner diameter difference between the pressure-reducing pipe 2 and the coil pipe is controlled within 3 - 15 mm, and the outer diameter of the pressure-reducing pipe 2 is restricted. Setting a gap can ensure that the pressure-reducing pipe 2 is heated as much as possible. The purpose is to ensure sufficient thermal efficiency while reducing pressure and achieving the effect of maintaining pressure.

[0066] In addition, after the pressure-reducing pipe 2 expands, some air existing in the additives can be dispersed, making it not easy to form intermittent air spraying, and the operation is more stable.

[0067] In some embodiments, the inner diameter difference between the pressure-reducing pipe 2 and the coil pipe is controlled within 6 - 14 mm, and the outer diameter of the pressure-reducing pipe 2 is 16 - 28 mm, such as 18 mm, 22 mm, 25 mm, 26.2 mm. The wall thickness of the pressure-reducing pipe 2 can be as small as 0.4 mm at the minimum, and can be more than 2 mm at a larger value, generally controlled within 0.6 - 1.8 mm, such as 0.8 mm, 1.0 mm, 1.3 mm, etc. While ensuring strength, the thermal conductivity is also relatively good.

[0068] The spiral structure surrounded by the coil pipe 1 can be a structure with a uniform size. Preferably, the coil pipe 1 is conical, and the inner diameter of the end closer to the combustion mechanism 5 is larger than that of the other end. A gap is formed between the pipelines of the coil pipe 1 for the flame to pass through. Through this structure, the pipelines of the coil pipe can be surrounded by the flame, improving the thermal efficiency.

[0069] In another embodiment, the heating pipe includes a coil pipe 1, a pressure-reducing pipe 2, and a nozzle assembly 3. The coil pipe 1 is wound in a spiral structure. One end of the coil pipe 1 is the coil pipe head end 102 for connecting to the additive pipe 103; the other end of the coil pipe 1 is the coil pipe tail end 101, and the coil pipe tail end 101 is bent inward to facilitate connecting to the pressure-reducing pipe 2.

[0070] The pressure-reducing pipe 2 is arranged inside the spiral structure surrounded by the coil pipe 1. The inlet end 201 of the pressure-reducing pipe 2 is communicated with the coil pipe tail end 101, and the outlet end 202 of the pressure-reducing pipe 2 is provided with the nozzle assembly 3; the nozzle assembly 3 includes a connection head 31 and a nozzle 32. One side of the connection head 31 is detachably connected to the pressure-reducing pipe 2, and the other side of the connection head 31 is provided with the nozzle 32. The nozzle 32 is communicated with the pressure-reducing pipe 2 for spraying atomized water vapor.

[0071] The inner diameter of the pressure-reducing pipe 2 is larger than that of the coil pipe 1, and the difference is 6-12 mm, such as 8 mm. The outer diameter of the pressure-reducing pipe 2 is 24 mm. A gap for the flame to pass through is formed between the outer wall of the pressure-reducing pipe 2 and the coil pipe 1. There is a gap between adjacent pipes of the coil pipe 1, enabling it to be surrounded by the flame.

[0072] Combined Figure 3 , as an embodiment of the coil pipe, the coil pipe 1 includes a spiral section 11 and a straight pipe section 12. The tail end 101 of the coil pipe bends and extends into the spiral section 11 to form the straight pipe section 12, and the straight pipe section 12 is communicated with the pressure-reducing pipe 2.

[0073] As a part of the coil pipe 1, the straight pipe section 12 has strong thermal efficiency to ensure that the auxiliary agent is fully vaporized. For the auxiliary agent from room temperature to the final state, it rapidly heats up in the initial stage, then there is a gas-liquid coexistence state, and finally it is mainly gas, which requires a change process. In some embodiments with fewer judgment segments, the straight pipe section 12 can be set to be extended for efficient heating so that the medium is in a gaseous state when entering the pressure-reducing pipe 2, and the thermal efficiency can be utilized to a greater extent.

[0074] Furthermore, in some embodiments, the pressure-reducing pipe 2 should have a certain length to play a role in pressure regulation, such as 35 mm, 45 mm. In the preferred scheme, the length of the pressure-reducing pipe is generally not less than 40 mm to form sufficient pressure regulation space; the length of the pressure-reducing pipe can be adjusted according to the length of the coil pipe.

[0075] Figure 4 An embodiment of the pressure-reducing pipe 2 is shown. In this embodiment, the pressure-reducing pipe 2 is distributed in a stepped manner to form a plurality of stepped pipes with different diameters, such as a two-stage or three-stage structure, and the diameter of the stepped pipe increases from the inlet end 201 to the outlet end 202.

[0076] In Figure 4 the shown case, the pressure-reducing pipe 2 includes 2 stepped pipes, namely the connected first-order pipe 21 and second-order pipe 22. The first-order pipe 21 is communicated with the tail end 101 of the coil pipe, and the second-order pipe 22 is connected to the nozzle assembly 3; the diameter of the second-order pipe 22 is larger than that of the first-order pipe 21, and the difference between the inner diameter of the first-order pipe 21 and the coil pipe can be 3-8 mm. In one embodiment, the diameter of the first-order pipe 21 is 12 mm, and the diameter of the second-order pipe 22 is 18 mm.

[0077] Through this stepped structure, the end close to the combustion mechanism can have better thermal efficiency, while the end close to the nozzle assembly 3 can have a larger accommodation space, form a certain pressure, and avoid blockage.

[0078] Combined Figure 5, the nozzle assembly 3 includes a connector 31 and a nozzle 32. One side of the connector 31 is detachably connected to the pressure-reducing pipe 2, and the other side of the connector 31 is provided with the nozzle 32, and the nozzle 32 is communicated with the pressure-reducing pipe 2.

[0079] In Figure 5 , a threaded section 33 is provided on the connector 31, and the threaded section 33 is an external thread; an internal thread is provided on the pressure-reducing pipe 2, and the external thread is matched with the internal thread to achieve connection. The middle of the threaded section 33 is hollow and communicated with the nozzle 32. The nozzle 32 is fixed on the connector 31. The size of the connector 31 is larger than that of the threaded section 33, so as to be able to abut against the end face of the pressure-reducing pipe 2 for positioning or sealing. The connector 31 can be set as a hexagonal structure, which is convenient for engaging with a wrench for disassembly.

[0080] As another embodiment, the threaded section 33 can adopt an internal thread structure, and an external thread is formed at the end of the pressure-reducing pipe 2 to achieve the connection between the two.

[0081] Figure 6 Another connection method of the nozzle is shown. In this embodiment, an extension pipe 34 is installed on the connector 31. The extension pipe 34 is a straight pipe or a bent pipe, and the nozzle 32 is installed at the end of the extension pipe 34.

[0082] The connector 31 does not necessarily have an independent structure, and its main function is to connect the nozzle 32.

[0083] The nozzle assembly 3 is set in a detachable connection mode, which is convenient for cleaning the pressure-reducing pipe 2. The inner diameter of the traditional coiled pipe is small, and the deposited scale inside cannot be taken out after being blocked. When a pressure-reducing pipe 2 with a larger pipe diameter is used, the accumulated scale can be scraped out with other instruments.

[0084] In other embodiments, the inner pipe diameter of the nozzle 32 is smaller than the inner pipe diameter of the pressure-reducing pipe 2, and the nozzle 32 extends out of the spiral structure of the coiled pipe 1; a threaded structure is provided at the outlet end 202 of the pressure-reducing pipe 2, and the connector 31 is provided with a threaded section that cooperates with the threaded structure.

[0085] Since it is not directly heated near the nozzle 32 extending out of the spiral structure, and the steam flow velocity is high in the pipeline connecting the nozzle, it is not easy to scale. And because the holding part is arranged at one end of the combustion mechanism during use, and one end of the pressure-reducing pipe 2 near the nozzle 32 is inclined downward, scaling is likely to occur at this position, so a detachable structure is arranged at this position to facilitate the treatment of the accumulated scale.

[0086] The end face of the connection end of the pressure-reducing pipe 2 and the tail end 101 of the coiled pipe is closed, and the tail end 101 of the coiled pipe is connected to the side wall of the pressure-reducing pipe 2.

[0087] For the pressure-reducing sprayer, a blower is provided on the sprayer to supply air to the combustion chamber to provide the air required for combustion. A handle 6 is provided on the combustion housing 4 for hand-held operation.

[0088] During operation, the combustion mechanism 5 sprays a protective flame into the combustion housing to heat the heating tube. The heating tube is connected to an external additive tank through an additive pipe 103, and an additive pump pumps the additive in the additive tank into the heating tube. The liquid in the heating tube is rapidly heated and vaporized when heated, and the mist is ejected outward through the nozzles on the heating tube.

[0089] The above has schematically described the present invention and its embodiments. This description is not restrictive, and only one of the embodiments of the present invention is shown in the drawings. The actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design, without creative work, a structural manner and an embodiment similar to the technical solution without departing from the gist of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A pressure-reducing sprayer, comprising a heating tube, a combustion shell (4) and a combustion mechanism (5), wherein the heating tube is installed in the combustion shell (4), and the combustion mechanism (5) is arranged at one end of the combustion shell (4) for heating the heating tube; characterized in that: The heating tube comprises: The coil (1) is spirally wound, the end of the coil (1) away from the combustion mechanism (5) is the coil head end (102), which is used to connect the auxiliary agent tube (103), and the end of the coil (1) close to the combustion mechanism (5) is the coil tail end (101); A pressure-reducing pipe (2) is arranged in the spiral structure surrounded by the coil (1); the inlet end (201) of the pressure-reducing pipe (2) is connected to the tail end (101) of the coil; and the outlet end (202) of the pressure-reducing pipe (2) is connected to a nozzle assembly (3); The inner diameter of the pressure-reducing pipe (2) is larger than the inner diameter of the coil (1), with the difference being 3 to 15 mm, and the outer wall diameter of the pressure-reducing pipe (2) is not larger than 38 mm, and a gap is formed between the outer wall of the pressure-reducing pipe (2) and the coil (1) for the flame to pass through.

2. A pressure-reducing sprayer according to claim 1, characterized in that: The wall thickness of the pressure reducing pipe (2) is 0.3 to 3.5 mm, and the outer diameter of the pressure reducing pipe (2) is 16 to 34 mm.

3. A pressure-reducing sprayer according to claim 1, characterized in that: The coil head end (102) is bent at the end of the combustion shell (4) and extends to the outside of the combustion shell (4); the coil head end (102) extends from the end surface or side wall of the combustion shell (4); The coil (1) is tapered, and the inner diameter of one end close to the combustion mechanism (5) is larger than the inner diameter of the other end, so that gaps are formed between the pipes of the coil (1).

4. A pressure-reducing sprayer according to claim 1, characterized in that: The coil (1) comprises a spiral section (11) and a straight section (12); the coil tail end (101) bends and extends inside the spiral section (11) to form a straight section (12); and the straight section (12) is connected to the pressure-reducing pipe (2); The length of the pressure reducing pipe (2) is not less than 40 mm.

5. A pressure-reducing sprayer according to any one of claims 1 to 4, characterized in that: The pressure-reducing pipes (2) are distributed in a stepped manner, forming a plurality of stepped pipes with different diameters, and the diameters of the stepped pipes increase gradually from the inlet end (201) to the outlet end (202).

6. A pressure-reducing sprayer according to claim 1, characterized in that: The spray head assembly (3) comprises a connecting head (31) and a nozzle (32); one side of the connecting head (31) is detachably connected to the pressure reducing pipe (2); the other side of the connecting head (31) is provided with the nozzle (32), and the nozzle (32) is in communication with the pressure reducing pipe (2).

7. A pressure-reducing sprayer according to claim 6, characterized in that: The connector (31) is threadably connected to the pressure reducing pipe (2); an internal thread or an external thread section is provided on the connector (31), and an external thread or an internal thread is correspondingly provided on the pressure reducing pipe (2).

8. A pressure-reducing sprayer according to claim 6, characterized in that: The nozzle (32) is mounted on the connecting head (31); or, An extension pipe (34) is installed on the connector (31). The extension pipe (34) is a straight pipe or a curved pipe. A nozzle (32) is installed at the end of the extension pipe (34).

9. A pressure-reducing sprayer heating tube, characterized in that: The heating tube includes: The coil (1) is spirally wound, one end of the coil (1) is a coil head end (102) for connecting to an auxiliary agent tube (103); the other end of the coil (1) is a coil tail end (101), and the coil tail end (101) is bent inwards; A pressure-reducing pipe (2) is arranged in the spiral structure surrounded by the coil (1); the inlet end (201) of the pressure-reducing pipe (2) is connected to the tail end (101) of the coil; and the outlet end (202) of the pressure-reducing pipe (2) is provided with a nozzle assembly (3); The inner diameter of the pressure-reducing pipe (2) is larger than the inner diameter of the coil (1), the difference being 3 to 15 mm, and the outer wall diameter of the pressure-reducing pipe (2) is not larger than 32 mm, and a gap is formed between the outer wall of the pressure-reducing pipe (2) and the coil (1) for the flame to pass through; The nozzle assembly (3) comprises a connecting head (31) and a nozzle (32), wherein one side of the connecting head (31) is detachably connected to the pressure reducing pipe (2), and the other side of the connecting head (31) is provided with the nozzle (32), and the nozzle (32) is connected to the pressure reducing pipe (2).

10. The pressure-reducing sprayer heating tube according to claim 9, characterized in that: The inner diameter of the nozzle (32) is smaller than the inner diameter of the pressure reducing pipe (2), and the nozzle (32) extends outside the spiral structure of the coil (1); The outlet end (202) of the pressure-reducing pipe (2) is provided with a threaded structure, and the connector (31) is provided with a threaded section that matches the threaded structure.

11. The pressure-reducing sprayer heating tube according to claim 10, characterized in that: The pressure-reducing pipe (2) is distributed in a stepped manner, and comprises at least a first-stage pipe (21) and a second-stage pipe (22) connected to each other; the first-stage pipe (21) is connected to the tail end (101) of the coil, and the second-stage pipe (22) is connected to the nozzle assembly (3); the diameter of the second-stage pipe (22) is larger than the diameter of the first-stage pipe (21).

12. The pressure-reducing sprayer heating tube according to claim 10, characterized in that: The nozzle (32) is mounted on the connecting head (31); or, An extension pipe (34) is installed on the connector (31). The extension pipe (34) is a straight pipe or a curved pipe. A nozzle (32) is installed at the end of the extension pipe (34).

13. The pressure-reducing sprayer heating tube according to claim 9, characterized in that: The end surface of the connection end between the pressure-reducing pipe (2) and the coil tail end (101) is closed, and the coil tail end (101) is connected to the side wall of the pressure-reducing pipe (2).

14. The pressure-reducing sprayer heating tube according to claim 9, characterized in that: The coil (1) comprises a spiral section (11) and a straight section (12); the coil tail end (101) bends and extends inside the spiral section (11) to form a straight section (12); and the straight section (12) is connected to the end face of the pressure-reducing pipe (2).

15. The pressure-reducing sprayer heating tube according to claim 9, characterized in that: The outer diameter of the pressure-reducing tube (2) is 16 to 30 mm, and the inner diameter is 12 to 26 mm; the length of the pressure-reducing tube (2) is not less than 40 mm.

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