Spray gun for heating winding storage tank

Abstract

The utility model relates to a spray gun for heating a winding storage tank. The spray gun comprises an air inlet pipe, a spray pipe and a connecting part, the outer wall of the air inlet pipe and the outer wall of the injection pipe are fixedly connected through a connecting part. The two ends of the air inlet pipe are the air inlet end and the air spraying end respectively. And two ends of the injection pipe are a mixing end and a combustion end respectively. The air inlet end is connected with an air source. The diameter of the mixing end is larger than that of the air injection end. The air injection end coaxially faces the mixing end, and the air injection end and the mixing end are arranged at an interval. And an air inlet gap is formed between the air injection end and the mixing end. And external air at the air inlet gap is driven by the fuel gas sprayed out of the gas spraying end to jointly enter the spraying pipe through the mixing end. Fuel gas and air are sprayed out from the combustion end and combusted to heat the conical mold. According to the utility model, gas is fully combusted, and a plastic melting belt can be tightly grabbed on the surface of a mold in the winding manufacturing process of the cone bottom of the storage tank, so that the cone bottom of the plastic storage tank, which is not separated from the plastic melting belt, is continuously wound and is formed by one-step winding, is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of blowtorches, in particular to a blowtorch for heating a wound storage tank. Background Technique

[0002] Storage tanks made of plastic materials such as PP (polypropylene) and PPH (reinforced polypropylene) have the advantages of corrosion resistance, high strength, anti-leakage, resistance to high and low temperatures, long service life, low cost, light weight, etc., and are widely used in the fields of chemical industry, petroleum, chlor-alkali, dyes, medicine, light industry, metallurgy, etc.

[0003] At present, the production process of storage tanks is generally as follows: First, plastic particles (such as PPH particles) are melted and wound to make an integrally formed tank wall with both ends open, then plastic sheets (such as PPH sheets) are used to make the tank top and tank bottom respectively, and finally the tank top and tank bottom are welded to the two open ends of the tank wall respectively.

[0004] When winding the tank body, in order to make the adjacent two circles of materials adhere tightly, it is necessary to continuously heat the materials during the winding process to extend the time for their cooling and forming. Content of the Utility Model

[0005] To solve the above technical problems, the present application provides a blowtorch for heating a wound storage tank.

[0006] The utility model provides the following technical solutions:

[0007] A blowtorch for heating a wound storage tank, comprising an air inlet pipe, a spray pipe and a connecting part; wherein, the outer walls of the air inlet pipe and the spray pipe are fixedly connected through the connecting part; the two ends of the air inlet pipe are respectively an air inlet end and an air jet end; the two ends of the spray pipe are respectively a mixing end and a combustion end; the air inlet end is connected to a gas source; the diameter of the mixing end is larger than that of the air jet end; the air jet end is coaxially and directly opposite to the mixing end, and the air jet end is spaced from the mixing end; an air inlet gap is formed between the air jet end and the mixing end; the external air at the air inlet gap is driven by the gas ejected from the air jet end and jointly enters the spray pipe through the mixing end; the gas and air are ejected and burned at the combustion end to heat the storage tank.

[0008] Optionally, the air inlet pipe has a nozzle; the nozzle is arranged on the air jet end; the gas is ejected through the nozzle at the air jet end; the position of the nozzle can be adjusted along the axis of the air inlet pipe to adjust the distance between the nozzle and the mixing end.

[0009] Optionally, the nozzle is threadedly connected to the jet end of the intake pipe; by rotating the nozzle, the nozzle can move along the axis of the intake pipe to adjust the distance between the nozzle and the mixing end.

[0010] Optionally, the ratio of the diameter of the intake pipe to the diameter of the injection pipe is between 1:1.1 and 1:1.3.

[0011] Optionally, the connecting part is C-shaped and flat; one end of the connecting part is fixedly connected to the outer wall of the intake pipe, and the other end is fixedly connected to the outer wall of the injection pipe.

[0012] Optionally, the number of the connecting parts is multiple; the multiple connecting parts are symmetrically distributed around the axis of the intake pipe.

[0013] Optionally, a fairing is provided at the combustion end of the injection pipe; the fairing is used to prevent the mixture of gas and air from diffusing around after spraying out from the combustion end.

[0014] Optionally, the fairing is cylindrical, with a diameter larger than that of the injection pipe, and is coaxially arranged with the injection pipe; one end of the fairing close to the mixing end is closed and fixedly connected to the outer wall of the injection pipe; the other end of the fairing away from the mixing end is open.

[0015] As described above, the spray gun for heating a wound storage tank of the present invention has at least the following beneficial effects:

[0016] The spray gun for heating a wound storage tank of the present invention drives the air around the intake gap into the mixing end of the injection pipe by the high-velocity gas ejected from the jet end, and then sprays out and burns from the combustion end, without the need to separately provide oxygen, and the gas burns fully, with a high flame temperature, and can continuously heat the material during the process of manufacturing the wound storage tank, prolonging the cooling and forming time of the material. Description of the Drawings

[0017] Figure 1 is a schematic diagram for showing the overall structure of the spray gun for heating a wound storage tank.

[0018] Figure 2 is another schematic diagram for showing the overall structure of the spray gun for heating a wound storage tank.

[0019] Figure 3 is a schematic diagram for showing the structure of the nozzle.

[0020] Figure 4 is a partial cross-sectional view for showing the structure of the fairing.

[0021] Reference numerals: 1, intake pipe; 11, intake end; 12, jet end; 2, injection pipe; 21, mixing end; 22, combustion end; 3, connecting part; 4, intake gap; 5, nozzle; 51, mounting part; 52, head; 53, nut; 6, fairing. Detailed implementation manners

[0022] The following uses specific specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. It should also be understood that the terms used in the embodiments of the present utility model are for describing specific specific implementation manners, rather than for limiting the protection scope of the present utility model. The test methods without specific conditions noted in the following embodiments are usually in accordance with conventional conditions or in accordance with the conditions recommended by each manufacturer.

[0023] It should be noted that 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 skilled in this technology to understand and read, and are not used to limit the limited conditions under which the present utility model can be implemented. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope 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 "one" cited in this specification are only for the convenience of clear narration, rather than for limiting the scope within which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present utility model can be implemented.

[0024] Please refer to Figures 1-4, the present utility model discloses a spray gun for heating a wound storage tank, which includes an air inlet pipe 1, a spray pipe 2 and a connecting part 3. Among them, the outer walls of the air inlet pipe 1 and the spray pipe 2 are fixedly connected through the connecting part 3. The two ends of the air inlet pipe 1 are respectively an air inlet end 11 and an air jet end 12. The two ends of the spray pipe 2 are respectively a mixing end 21 and a combustion end 22. The air inlet end 11 is connected to a gas source. The diameter of the mixing end 21 is larger than that of the air jet end 12. The air jet end 12 is coaxially and directly opposite to the mixing end 21, and the air jet end 12 is arranged at an interval from the mixing end 21. An air inlet gap 4 is formed between the air jet end 12 and the mixing end 21. The external air at the air inlet gap 4 is driven by the gas ejected from the air jet end 12 and jointly enters the spray pipe 2 through the mixing end 21; the gas and air are ejected and burned at the combustion end 22 to heat the storage tank.

[0025] The implementation principle of the spray gun for heating the storage tank is as follows: The gas enters the air inlet pipe 1 from the air inlet end 11 of the air inlet pipe 1, and then is ejected from the air jet end 12 towards the mixing end 21 of the spray pipe 2. At the mixing end 21, due to the high-speed flow of the gas from the air jet end 12 into the mixing end 21, the air around the air inlet gap 4 will be driven into the mixing end 21 to mix with the gas, providing oxygen for the combustion of the gas, and finally being ejected from the combustion end 22. When the gas-air mixture is ignited at the combustion end 22, a conical flame is formed at the combustion end 22, which can be used to continuously heat the materials during the process of winding and manufacturing the tank body, and extend the time for its cooling and forming.

[0026] Please refer to Figures 1-3 , the air inlet end 11 of the air inlet pipe 1 is connected to the gas source through a hose, and the gas source can be gas such as natural gas or coal gas. The air inlet pipe 1 is provided with a nozzle 5. The nozzle 5 is arranged on the air jet end 12. The gas is ejected through the nozzle 5 at the air jet end 12. The position of the nozzle 5 can be adjusted along the axis of the air inlet pipe 1 to adjust the distance between the nozzle 5 and the mixing end 21.

[0027] Specifically, the nozzle 5 includes a mounting part 51 and a head 52. The mounting part 51 is a hollow cylinder, coaxially sleeved on the air jet end 12 of the air inlet pipe 1 and threadedly connected to the air inlet pipe 1. The head 52 is hemispherical, with the same diameter as the mounting part 51. The maximum diameter of the head 52 is fixedly connected to the end of the mounting part 51 far from the air inlet pipe 1. An opening is provided at the top of the head 52 facing the mixing end 21 for the gas to be ejected. By rotating the nozzle 5, the nozzle 5 can move along the axis of the air inlet pipe 1 to adjust the distance between the nozzle 5 and the mixing end 21. Adjusting the distance between the nozzle 5 and the mixing end 21 is essentially to adjust the size of the air inlet gap 4, and further adjust the amount of air flowing into the mixing end 21, adjust the ratio of gas to air to be suitable for gas combustion, so as to ensure the stability of the flame at the combustion end 22, and finally enable the flame to stably heat the wound materials, extend the time for the materials to cool and form, and at the same time prevent the materials from being burned out.

[0028] In order to make the nozzle 5 rotate more conveniently, a rotating member is fixed to the outside of the mounting portion 51. In this embodiment, the rotating member is a nut 53, and the nut 53 is coaxially fixed to the outside of the mounting portion 51. The nozzle 5 can be conveniently adjusted by rotating the nut 53. In some other embodiments of the present utility model, the rotating member can also be a suitable component such as a handle or an anti-slip sleeve.

[0029] More specifically, the diameter of the injection pipe 2 is larger than that of the intake pipe 1. And when the diameter of the injection pipe 2 is too close to that of the intake pipe 1, insufficient air will not be mixed at the mixing end 21, resulting in insufficient combustion of the fuel gas. When the diameter of the injection pipe 2 is much larger than that of the intake pipe 1, too much air will be mixed at the mixing end 21, which will also cause insufficient combustion of the fuel gas. Therefore, the ratio between the diameter of the intake pipe 1 and the diameter of the injection pipe 2 is between 1:1.1 and 1:1.3, for example, it can be 1:1.1, 1:1.2, 1:1.3. As a preference, in this embodiment, the ratio between the diameter of the intake pipe 1 and the diameter of the injection pipe 2 is 1:1.2.

[0030] Please refer to Figure 1 、 2 . The function of the connecting portion 3 is to fixedly connect the intake pipe 1 and the injection pipe 2. Through the connecting portion 3, the spray gun for heating the wound storage tank can also be installed on the rack, and then a plurality of spray guns for heating the wound storage tank are arranged in a matrix to improve the heating effect. For the convenience of connecting the connecting portion 3 with the rack, in this embodiment, the connecting portion 3 is C-shaped and flat. One end of the connecting portion 3 is fixedly connected to the outer wall of the intake pipe 1, and the other end is fixedly connected to the outer wall of the injection pipe 2. The number of the connecting portions 3 is multiple. The multiple connecting portions 3 are symmetrically distributed around the axis of the intake pipe 1. In some other embodiments of the present utility model, the shape of the connecting portion 3 can be reasonably set according to the way it cooperates with the rack.

[0031] Please refer to Figure 2 、 4 . A fairing 6 is provided at the combustion end 22 of the injection pipe 2. The fairing 6 is cylindrical, with a diameter larger than that of the injection pipe 2, and is coaxially arranged with the injection pipe 2. One end of the fairing 6 close to the mixing end 21 is closed and fixedly connected to the outer wall of the injection pipe 2. The other end of the fairing 6 away from the mixing end 21 is open. The function of the fairing 6 is to prevent the mixture of fuel gas and air from diffusing around after spraying out from the combustion end 22, so that the flame is more concentrated, which helps to improve the heating effect and at the same time reduce the consumption of fuel gas.

[0032] The spray gun for heating a winding storage tank of the present utility model drives the air around the intake gap 4 into the mixing end 21 of the injection pipe 2 through the high-velocity gas ejected from the gas ejection end 12, and then ejects and burns from the combustion end 22. It does not require separate oxygen supply, and the gas burns fully with a high flame temperature, capable of continuously heating the material during the winding production of the storage tank and extending the cooling and forming time of the material.

[0033] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A spray gun for heating a winding storage tank, characterized in that: It comprises an air intake pipe (1), an injection pipe (2) and a connecting part (3); wherein: The outer wall of the air intake pipe (1) and the outer wall of the injection pipe (2) are fixedly connected via the connecting portion (3); The two ends of the air intake pipe (1) are respectively an air intake end (11) and an air injection end (12); the two ends of the air injection pipe (2) are respectively a mixing end (21) and a combustion end (22); The air inlet end (11) is connected to an air source; The diameter of the mixing end (21) is greater than the diameter of the jet end (12); the jet end (12) is coaxially opposite to the mixing end (21), and the jet end (12) and the mixing end (21) are spaced apart; An air intake gap (4) is formed between the jet end (12) and the mixing end (21); the external air at the air intake gap (4), driven by the gas jetted from the jet end (12), passes through the mixing end (21) and enters the jet pipe (2); The gas and air are sprayed out and burned at the combustion end (22) to heat the storage tank.

2. The spray gun for heating a winding storage tank according to claim 1, characterized in that: The air intake pipe (1) has a nozzle (5); The nozzle (5) is arranged on the jet end (12); the gas is jetted out through the nozzle (5) at the jet end (12); The position of the nozzle (5) can be adjusted along the axis of the air inlet pipe (1) to adjust the distance between the nozzle (5) and the mixing end (21).

3. The spray gun for heating a winding storage tank according to claim 2, characterized in that: The nozzle (5) is threadedly connected to the jet end (12) of the air inlet pipe (1); By rotating the nozzle (5), the nozzle (5) can be moved along the axis of the air inlet pipe (1) to adjust the distance between the nozzle (5) and the mixing end (21).

4. The spray gun for heating a winding storage tank according to claim 1, characterized in that: The ratio of the diameter of the air intake pipe (1) to the diameter of the injection pipe (2) is between 1:1.1 and 1:1.

3.

5. The spray gun for heating a winding storage tank according to claim 1, characterized in that: The connecting portion (3) is C-shaped and flat; One end of the connecting portion (3) is fixedly connected to the outer wall of the air intake pipe (1), and the other end is fixedly connected to the outer wall of the injection pipe (2).

6. The spray gun for heating a winding storage tank according to claim 5, characterized in that: The number of the connecting parts (3) is multiple; The plurality of connecting portions (3) are symmetrically distributed around the axis of the air intake pipe (1).

7. The spray gun for heating a wound storage tank according to claim 1, characterized in that: The injection pipe (2) is provided with a fairing (6) at the combustion end (22); the fairing is used to prevent the mixed gas of the fuel gas and the air from diffusing to the surroundings after being ejected from the combustion end (22).

8. The spray gun for heating a wound storage tank according to claim 7, characterized in that: The fairing (6) is cylindrical, has a diameter greater than that of the injection pipe (2), and is coaxially arranged with the injection pipe (2); One end of the fairing (6) close to the mixing end (21) is closed and fixedly connected to the outer wall of the injection pipe (2); The end of the fairing (6) away from the mixing end (21) is open.

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