A heating structure for the end face of a metal skeleton pipe

Abstract

The application discloses a heating structure for the end face of a metal skeleton pipe, which comprises a heating mechanism, wherein the heating mechanism has an annular heating cavity for the pipe end to extend into and hot air to be introduced into for heating the pipe. The application uses high-temperature airflow as a medium to heat the pipe, thereby avoiding the situation that the plastic pipe is heated to melt and adhere to the heating structure. The application adopts a spiral airflow channel design to ensure that the airflow is uniformly diffused and uniformly heats the end face of the pipe. The air duct is narrowed, and a slanted air duct is designed. The high-temperature airflow is blown to the notch of the pipe end face to ensure uniform heating. That is, the high-temperature airflow is uniformly diffused in the circumferential direction after being guided by the airflow air duct, so that the heat is uniformly distributed, the pipe is uniformly heated, and the uneven heating phenomenon is avoided.

Description

Technical Field

[0001] This invention belongs to the field of pipe processing technology, specifically relating to a heating structure for the end face of a metal skeleton pipe. Background Technology

[0002] After the central metal skeleton of a metal-framed tube is cut away, the remaining inner and outer plastic layers need to be melted together before molding. The current common molding method involves shaping a heating plate into a concave form that fits precisely to the cut end face of the tube, then heating the end face. This method has the following drawbacks:

[0003] 1. The heating plate is in direct contact with the pipe, and the pipe is made of plastic, PE or PVC, which can easily stick to the heating plate, requiring manual cleaning and affecting the level of automation.

[0004] 2. When the heating plate heats the pipe, uneven heating can cause the part in contact with the heating plate to melt earlier, while the part away from the heating plate is not heated well. This results in uneven heating of the inside and outside of the pipe, which affects the subsequent forming effect. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention aims to provide a heating structure for the end face of a metal skeleton tube, thereby preventing the heating tube from sticking to the heating structure.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A heating structure for the end face of a metal skeleton tube includes a heating mechanism having an annular heating cavity into which the end of the tube extends and through which hot air can be introduced to heat the tube.

[0008] This invention heats the pipe (PE or PVC) by introducing a heating airflow into the annular heating chamber. The high-temperature airflow is used as the medium to heat the pipe. Air can be used as the heating medium, which can prevent the plastic material (PE or PVC) from sticking to the heating structure after heating.

[0009] The heating mechanism in this invention has various structural forms. Preferably, the heating mechanism includes a hot air inner plate and a hot air outer plate that is sleeved on the outside of the hot air inner plate; there is a space between the hot air inner plate and the hot air outer plate, which forms the annular heating cavity.

[0010] In this invention, the hot air inner plate is positioned at the end of the pipe to be heated, and the hot air outer plate is sleeved on the outside of the hot air inner plate, so that the end of the pipe is heated in the annular heating cavity between the hot air inner plate and the hot air outer plate.

[0011] In this invention, there are various structural forms for the annular heating cavity. Preferably, the outer wall of the hot air inner plate is provided with a first annular heating groove, and the inner wall of the hot air outer plate is provided with a second annular heating groove corresponding to the position of the first annular heating groove. The area enclosed by the first annular heating groove and the second annular heating groove forms the annular heating cavity.

[0012] The present invention forms an annular heating cavity by means of a first annular heating groove on the inner hot air plate and a second annular heating groove on the outer hot air plate, and hot air can be used to heat the pipe by entering the annular heating cavity.

[0013] In this invention, there are various ways to introduce hot air into the annular heating cavity. For example, the annular heating cavity can have a hot air inlet. Preferably, the inner hot air plate has an airflow duct for introducing hot air into the annular heating cavity, and a hot air outlet connected to the hot air input device and communicating with the airflow duct.

[0014] In this invention, hot air is introduced through a hot air inlet on the inner hot air plate via a hot air input device, and then guided into the annular heating cavity through an airflow duct. The airflow duct can have various structural forms; to ensure uniform hot air distribution, preferably, the hot air inlet is located at the center of the inner hot air plate. The airflow duct includes:

[0015] Several swirling air ducts are arranged radially around the center of the hot air inner plate.

[0016] Several guiding air ducts are located on the side wall of the hot air inner plate, with one end connected to the swirling air duct and the other end connected to the annular heating cavity.

[0017] In this invention, the hot air inner plate's swirling air duct and direct air duct are mixed to fully mix the hot air, achieving uniform temperature and ensuring that the temperature and flow rate of the hot air diffusing from the center to the circumference are uniform. Finally, the hot air is guided into the annular heating cavity via the guide air duct. That is, the end face is designed as a swirling air duct to distribute the hot air flow evenly from the center to the surrounding area, ensuring a consistent temperature.

[0018] In this invention, the swirling air duct and the guiding air duct are evenly arranged along the circumference of the hot air inner plate, and the number can be set according to requirements.

[0019] In addition, there are various structural forms of the guiding air duct in this invention. As a preferred embodiment, the guiding air duct is arranged at an angle.

[0020] In this invention, the guide air ducts around the hot air inner plate are arranged at an angle, which can ensure that the high-temperature airflow blown toward the pipe end face is at an angle. One advantage is that it can mix the high-temperature airflow evenly again, avoiding uneven heating of the pipe end face due to uneven distribution of high-temperature airflow. Another advantage is that the airflow blows toward the pipe end face at an angle, making the pipe end face easier to heat up.

[0021] Preferably, the width of the guiding air duct is smaller than that of the swirling air duct, and the number of guiding air ducts is greater than the number of swirling air ducts.

[0022] In this invention, the width of the guiding air duct is smaller than that of the swirling air duct. The high-temperature hot air, after passing through the swirling air duct and reaching the guiding air duct, narrows and contracts. This narrowed hot air is then directed entirely towards the notch at the cut end of the pipe. This design primarily ensures: 1. Concentrated, non-dispersed high-temperature airflow; 2. Airflow only targets the notch, from which heat is conducted to both the inner and outer sides, ultimately forming a heating cavity on both sides of the pipe to heat the pipe end. To avoid reducing airflow due to narrowing of the ducts, the number of guiding air ducts in this invention can be greater than the number of swirling air ducts. Hot air exiting from one swirling air duct can then pass through multiple guiding air ducts into the annular heating cavity.

[0023] When using this invention for pipe heating, to improve processing efficiency, a heating structure can be connected to each end of the pipe. However, during heating, the lack of air circulation inside the pipe can easily affect the uniformity of heating inside. Preferably, the hot air inner plate is provided with an exhaust hole that can be connected to an air intake device. Exhaust is achieved by connecting the exhaust hole to an air intake device, such as an axial flow compressor.

[0024] Preferably, the hot air inner plate further includes a positioning part that mates with the interior of the pipe. In this invention, the positioning part mates with the interior of the pipe, facilitating pipe fixation.

[0025] The present invention also provides a heating system for the end face of a metal skeleton tube, comprising a body having at least one heating unit, the heating unit comprising...

[0026] The heating structure described above;

[0027] A hot air input device connected to the hot air inlet of the heating structure;

[0028] An air intake device connected to the exhaust hole on the hot air inner plate of the heating structure.

[0029] The heating system of the present invention can be equipped with at least one heating unit, for example, two heating units can be provided, and the two heating units can heat the pipe separately to improve processing efficiency.

[0030] In this invention, the hot air input device and the air intake device can have various structural forms, and various existing structural forms can be adopted. Preferably, the hot air input device includes a hot air pipe; the air intake device includes an axial flow motor and a suction device.

[0031] The advantages of this invention compared to the prior art are:

[0032] (1) The present invention uses high-temperature airflow as a medium to heat the pipe, thereby avoiding the situation where the plastic pipe melts and sticks to the heating structure due to heat.

[0033] (2) The present invention adopts a swirling airflow channel design to ensure uniform airflow diffusion and uniform heating of the pipe end face. The airflow channel is narrowed and designed with an inclined airflow channel. The high-temperature airflow is blown to the concave part of the pipe end face to ensure uniform heating. That is, the high-temperature airflow is guided by the airflow channel and diffuses evenly in the circumferential direction, so that the heat is evenly distributed and the pipe is heated evenly, avoiding the occurrence of uneven heating.

[0034] (3) When both ends of the pipe are heated at the same time, the hot air can be discharged and there will be no obstruction of internal airflow. It is suitable for heating one or both ends at the same time, which greatly improves work efficiency.

[0035] (4) This invention is applicable to pipes of different sizes. Only the hot air inner plate and hot air outer plate need to be replaced, so it has a wide range of applications.

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the existing technology.

[0039] Figure 2 This is a schematic diagram of the structure of this embodiment.

[0040] Figure 3 This is a schematic diagram of the structure of this embodiment.

[0041] Figure 4 This is a schematic diagram of the hot air inner plate in this embodiment.

[0042] Figure 5 This is a schematic diagram of the structure of this embodiment.

[0043] Explanation of the markings in the image:

[0044] 1. Inner hot air panel; 11. Hot air outlet; 12. Rotary air duct; 13. Guide air duct; 14. Exhaust vent; 2. Outer hot air panel; 3. Pipes; 4. Air intake device. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0047] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0048] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0049] like Figure 2 and Figure 3 As shown, this embodiment is a heating structure for the end face of a metal skeleton tube 3, including a heating mechanism. The heating mechanism has an annular heating cavity into which the end of the tube 3 extends and into which hot air can be introduced to heat the tube 3.

[0050] In this embodiment, heating is achieved by introducing a heating airflow into the annular heating chamber. The high-temperature airflow serves as the medium for heating the pipe 3 (materials such as PE or PVC). Air can be used as the heating medium, which can prevent the plastic material (PE or PVC) from sticking to the heating structure after heating.

[0051] In this embodiment, the heating mechanism has various structural forms. For example, in one embodiment, the heating mechanism includes a hot air inner plate 1 and a hot air outer plate 2 that is sleeved on the outside of the hot air inner plate 1. The outer wall of the hot air inner plate 1 is provided with a first annular heating groove, and the inner wall of the hot air outer plate 2 is provided with a second annular heating groove corresponding to the position of the first annular heating groove. The area enclosed by the first annular heating groove and the second annular heating groove forms the annular heating cavity.

[0052] In this embodiment, the hot air inner plate 1 is positioned at the end of the pipe 3 that needs to be heated, and the hot air outer plate 2 is sleeved on the outside of the hot air inner plate 1, so that the end of the pipe 3 is located between the hot air inner plate 1 and the hot air outer plate 2. The annular heating cavity is formed by the first annular heating groove on the hot air inner plate 1 and the second annular heating groove on the hot air outer plate 2. Hot air enters the annular heating cavity to heat the pipe 3.

[0053] In one embodiment, the hot air inner plate 1 further includes a positioning part that mates with the interior of the pipe 3. In this embodiment, the positioning part mates with the interior of the pipe 3 to facilitate fixing the pipe 3.

[0054] In this embodiment, there are multiple ways to introduce hot air into the annular heating cavity. For example, the heating cavity can have a hot air inlet. In one embodiment, the hot air inner plate 1 has an airflow duct for introducing hot air into the annular heating cavity, and a hot air outlet 11 connected to the hot air input device and communicating with the airflow duct.

[0055] In this embodiment, hot air is introduced through the hot air inlet 11 of the inner hot air plate 1 by a hot air input device, and then guided into the annular heating cavity through the airflow duct. The airflow duct can have various structural forms to ensure uniform hot air distribution, such as... Figure 4 As shown, in one embodiment, the hot air vent 11 is located at the center of the hot air inner plate 1, and the airflow duct includes:

[0056] Several swirling air ducts 12 are arranged radially around the center of the hot air inner plate 1.

[0057] Several guide air ducts 13 are located on the side wall of the hot air inner plate 1, with one end connected to the swirling air duct 12 and the other end connected to the annular heating cavity.

[0058] In this embodiment, the hot air inner plate 1's swirling air duct 12 mixes with the direct air duct, thoroughly mixing the hot air to achieve uniform temperature. This ensures that the temperature and flow rate of the hot air diffusing from the center to the circumference are uniform and consistent. Finally, the hot air is guided into the heating chamber via the guide air duct 13. That is, the end face is designed as a swirling air duct 12 to distribute the hot air flow evenly from the center to the surrounding area, ensuring a consistent temperature.

[0059] In this embodiment, the swirling air duct 12 and the guiding air duct 13 are evenly arranged around the hot air inner plate 1, and their number can be set according to requirements.

[0060] In this embodiment, the guiding air duct 13 has various structural forms. In one embodiment, the guiding air duct 13 is arranged at an angle.

[0061] In this embodiment, the guide air duct 13 around the hot air inner plate 1 is designed to be inclined, which can ensure that the high-temperature airflow blown towards the end face of the pipe 3 is oblique. One of its advantages is that the high-temperature airflow is mixed evenly again, avoiding uneven heating of the end face of the pipe 3 due to uneven distribution of high-temperature airflow. Another advantage is that the airflow is blown towards the end face of the pipe 3 at an angle, making the end face of the pipe 3 easier to heat up.

[0062] In one embodiment, the width of the guide air duct 13 is smaller than that of the swirling air duct 12, and the number of guide air ducts 13 is greater than the number of swirling air ducts 12.

[0063] In this embodiment, the width of the guiding air duct is smaller than that of the swirling air duct. The high-temperature hot air narrows as it passes through the swirling air duct 12 to the guiding air duct 13. After narrowing, the hot air is blown entirely towards the notch cut on the end face of the pipe 3. This mainly ensures: 1. The high-temperature airflow is concentrated and not dispersed; 2. The airflow only blows towards the notch, from which heat is conducted to both the inner and outer sides, ultimately forming a hot cavity on both sides of the pipe 3 to heat the end face of the pipe 3. To avoid reducing the airflow due to narrowing of the air duct, the number of guiding air ducts in this invention can be greater than the number of swirling air ducts. The hot air coming out of one swirling air duct can enter the annular heating cavity through multiple guiding air ducts.

[0064] When using this embodiment to heat the pipe 3, in order to improve processing efficiency, a heating structure can be connected to each end of the pipe 3 for heating. However, during heating, because the inside of the pipe 3 is not ventilated, it is easy to affect the uniformity of heating inside the pipe 3. Figure 5 As shown, in one embodiment, the hot air inner plate 1 is provided with an exhaust port 14 that can be connected to the air intake device 4. Exhaust is performed by connecting the exhaust port to the air intake device 4, such as an axial flow compressor.

[0065] This embodiment applies the aforementioned heating structure to a heating system. Therefore, this embodiment provides a heating system for the end face of a metal skeleton tube, including a body with at least one heating unit. The heating unit includes...

[0066] The heating structure described above;

[0067] A hot air input device connected to the hot air inlet 11 of the heating structure;

[0068] An air intake device 4 is connected to the exhaust hole on the hot air inner plate 1 in the heating structure.

[0069] In the heating system of this embodiment, at least one heating unit can be provided, for example, two units can be provided, and the two heating units can heat the pipe 3 respectively, thereby improving processing efficiency.

[0070] In this embodiment, the hot air input device and the suction device 4 can have various structural forms, and various existing structural forms can be adopted. In one embodiment, the hot air input device includes a hot air pipe; the suction device 4 includes an axial flow motor and a suction device, and the suction device can adopt various existing conventional structures.

[0071] In addition, in this embodiment, a sliding component can be provided in conjunction with a slide rail for the metal skeleton tube end heating system to enable the system to move. The system moves to the tube via sliding, aligning the tube end with the heating unit. The specific structure of the sliding component and slide rail can be any existing conventional form, and will not be elaborated upon here.

[0072] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A heating structure for the end face of a metal skeleton tube, characterized in that, Includes a heating mechanism having an annular heating cavity into which the end of the pipe extends and through which hot air can be introduced to heat the pipe; The heating mechanism includes a hot air inner plate and a hot air outer plate that passes through the outside of the hot air inner plate; there is a space between the hot air inner plate and the hot air outer plate, which forms the annular heating cavity; The outer wall of the hot air inner plate is provided with a first annular heating groove, and the inner wall of the hot air outer plate is provided with a second annular heating groove corresponding to the position of the first annular heating groove. The area enclosed by the first annular heating groove and the second annular heating groove forms the annular heating cavity. The hot air inner plate has an airflow duct for introducing hot air into the annular heating cavity, and a hot air outlet connected to the hot air input device and communicating with the airflow duct. The hot air inlet is located at the center of the inner hot air plate, and the airflow duct includes: Several swirling air ducts are arranged radially around the center of the hot air inner plate; Several guiding air ducts are located on the side wall of the hot air inner plate, with one end connected to the swirling air duct and the other end connected to the annular heating cavity.

2. The heating structure for the end face of a metal skeleton tube according to claim 1, characterized in that, The width of the guiding air duct is smaller than that of the swirling air duct.

3. The heating structure for the end face of a metal skeleton tube according to claim 2, characterized in that, The guiding air duct is arranged at an angle.

4. The heating structure for the end face of a metal skeleton tube according to claim 1, characterized in that, The hot air inner plate is provided with an exhaust hole that can be connected to the air intake device; the hot air inner plate also includes a positioning part that mates with the inside of the pipe.

5. A heating system for the end face of a metal-framed tube, characterized in that, The machine includes a body, which has at least one heating unit, the heating unit comprising: The heating structure as described in any one of claims 1 to 4; A hot air input device connected to the hot air inlet of the heating structure; An air intake device connected to the exhaust hole on the hot air inner plate of the heating structure.

6. The end-face heating system for metal-framed tubing according to claim 5, characterized in that, The hot air input device includes a hot air duct; the air intake device includes an axial flow fan and a suction device.

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