Rapid heating electric heating tube

Abstract

The utility model relates to the field of electric heating tubes, in particular to a quick-heating electric heating tube, which comprises a shell and a heating tube arranged in an inner cavity of the shell, a guide pin is inserted in the heating tube, one end of the guide pin extends towards one end of the shell and is connected with a lead, one end of the shell is connected with a mounting flange, and a heating wire is sleeved outside the heating tube. The heating pipe is sleeved with a heat conduction pipe, the heat conduction pipe is internally provided with a heat conduction cavity, the heat conduction cavity is filled with heat conduction oil, one end of the heat conduction cavity is provided with an oil injection hole, and the shell is internally provided with an oil injection channel corresponding to the oil injection hole in a communicated mode. The heating wire is arranged between the heating pipe and the heat conduction pipe, so that the heating wire is in contact with the heat conduction pipe, the heat conduction efficiency is further enhanced, the heat conduction oil is filled in the heat conduction cavity of the heat conduction pipe, and the heat is uniformly conducted and distributed on the whole outer surface of the shell.

Description

Technical Field

[0001] The utility model relates to the field of electric heating pipes, in particular to an electric heating pipe with rapid temperature increase. Background Art

[0002] Single-ended electric heating tube, also known as single-ended electric heating tube, is a common electric heating element. Its basic structure includes a metal tube, one end of which is closed and the other end is connected to the power supply. In the mold industry, single-ended electric heating tube is widely used in various plastic molding molds, die-casting molds, rubber molds, etc. As a mold heating element, its main function is to help the mold heat up quickly and maintain a constant temperature.

[0003] The main way to use a single-head electric heating tube in a mold is to insert its heating end into the heating hole of the mold, and to transfer heat through contact with the mold. The shell of the existing electric heating tube is generally a cylindrical structure, which can maximize the heating area of ​​the electric heating tube. At the same time, the other end of the electric heating tube is connected to a power source, and the mold is quickly heated by power-on heating.

[0004] The existing single-head electric heating tube has some defects. First, due to its limited heating area, its heating conduction effect is poor, and it takes a long time to reach the required temperature, resulting in a slow heating speed. Secondly, due to the problem of heating method, the heating of the existing single-head electric heating tube is uneven, making it difficult to produce a uniform temperature distribution on the entire surface of the metal tube, thereby affecting the temperature distribution of the mold, and easily generating a large heating energy consumption, increasing the cost of use, and affecting the rapid heating performance and uniform heating effect of the single-head electric heating tube. Utility Model Content

[0005] The purpose of the utility model is to solve the above defects and provide a fast heating electric heating tube to solve the technical problem that the heating conduction efficiency of the electric heating tube in the above background technology is poor, which leads to slow heating speed of the electric heating tube and affects the uniform distribution of the surface temperature of the electric heating tube.

[0006] The purpose of the utility model is achieved by the following methods:

[0007] A fast-heating electric heating tube comprises an outer shell and a heating tube arranged in the inner cavity of the outer shell, a guide pin is inserted into the interior of the heating tube, one end of the guide pin extends to one end of the outer shell and is connected to a wire, one end of the outer shell is connected to a mounting flange, and the other end of the outer shell is connected to a sealing cover by arc welding, a heating wire is sleeved on the outside of the heating tube, and the heating wire is spirally arranged on the outer surface of the heating tube, a heat-conducting tube is sleeved on the outside of the heating tube, the heating wire is arranged between the heating tube and the heat-conducting tube, and contacts the inner wall of the heat-conducting tube, a heat-conducting cavity is arranged inside the heat-conducting tube, and the heat-conducting cavity is filled with heat-conducting oil, an oil filling hole is arranged at one end of the heat-conducting cavity, an oil filling channel corresponding to the oil filling hole is arranged inside the outer shell, the oil filling channel is connected and extends along the length direction of the outer shell, and a sealing gasket is embedded and installed at one end of the outer shell close to the mounting flange.

[0008] Further in the above description, the heat pipe is coaxially sleeved and arranged inside the shell, and magnesium powder is filled between the outer surface of the heat pipe and the inner surface of the shell. The heat pipe is arranged to enhance the efficiency and stability of heat conduction after heating by the heating pipe, reduce the loss in the conduction process, and enable it to be evenly conducted to the outer surface of the shell after passing through the magnesium powder.

[0009] Further in the above description, the heating tube is sleeved in the heat-conducting tube, and an insulating pad is connected to the end of the heating tube away from the mounting flange, so that the heat loss at the end and the thermal damage to the end are reduced by the insulating pad.

[0010] Further in the above description, a sealing groove is provided on the surface of the sealing pad, a sealing gasket is embedded in the sealing groove, and the sealing groove is embedded and tightly fitted with one end of the heat pipe. The provision of the sealing gasket can enhance the sealing connection between the heating pipe and the heat pipe, thereby reducing heat loss.

[0011] Further in the above description, the outer surface of the mounting flange is provided with a threaded portion for screw connection to facilitate installation.

[0012] Further in the above description, a heat insulating pad is provided at the end of the heat conducting pipe which is sleeved inside the shell.

[0013] The beneficial effects of the utility model are as follows: through the coordinated design of the heating wire and the heat-conducting tube, the electric heating tube can be quickly heated to the required temperature, which greatly shortens the heating time; the heating wire is arranged between the heating tube and the heat-conducting tube so that the heating wire contacts the heat-conducting tube, thereby further enhancing the heat conduction efficiency, allowing the heat to be fully conducted and reducing the heating time; the heat-conducting oil is filled in the heat-conducting cavity of the heat-conducting tube, which can effectively conduct the heat generated by the heating wire and the heating tube to the outer shell, thereby improving the heat conduction efficiency and enhancing the uniform conduction of heat, which is beneficial to uniformly conduct the heat to the outer surface of the outer shell, so that it can enhance the uniform temperature distribution on the entire surface of the outer shell, thereby improving the heating and temperature rising efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional diagram of a fast-heating electric heating tube of the utility model;

[0015] Figure 2 This is an exploded view of a fast-heating electric heating tube of the utility model;

[0016] Figure 3 This is a cross-sectional view of a fast-heating electric heating tube of the utility model;

[0017] Figure 4 for Figure 3 A is a partial enlarged schematic diagram;

[0018] The reference numerals in the figure are: 1-housing, 2-heating tube, 3-wire, 4-mounting flange, 5-cover, 6-heating wire, 7-heat conducting tube, 8-thermal oil, 9-oil filling hole, 10-oil filling channel, 11-sealing pad, 12-magnesium powder, 13-insulating pad, 14-sealing groove, 15-sealing gasket, 16-threaded part, 17-insulating pad. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] In this embodiment, refer to Figure 1-Figure 4 The invention discloses a fast-heating electric heating tube, comprising a shell 1 and a heating tube 2 arranged in the inner cavity of the shell 1, wherein a guide pin is inserted into the interior of the heating tube 2, one end of the guide pin extends to one end of the shell 1 and is connected to a wire 3, one end of the shell 1 is connected to a mounting flange 4, and the other end of the shell 1 is connected to a sealing cover 5 by arc welding, a heating wire 6 is sleeved on the outside of the heating tube 2, and the heating wire 6 is spirally arranged on the outer surface of the heating tube 2, a heat conducting tube 7 is sleeved on the outside of the heating tube 2, the heating wire 6 is arranged between the heating tube 2 and the heat conducting tube 7, and contacts the inner wall of the heat conducting tube 7, a heat conducting cavity is arranged inside the heat conducting tube 7, and the heat conducting cavity is filled with heat conducting oil 8, an oil filling hole 9 is arranged at one end of the heat conducting cavity, an oil filling channel 10 corresponding to the oil filling hole 9 is arranged inside the shell 1, and the oil filling channel 10 is connected and extends along the length direction of the shell 1, and a sealing gasket 11 is embedded and installed at one end of the shell 1 close to the mounting flange 4.

[0021] The heat conducting pipe 7 is coaxially sleeved and arranged inside the shell 1, and magnesium powder 12 is filled between the outer surface of the heat conducting pipe 7 and the inner surface of the shell 1. The heat conducting pipe 7 is arranged to enhance the efficiency and stability of heat conduction after the heating pipe 2 is heated, reduce the loss in the conduction process, and evenly conduct it to the outer surface of the shell 1 after passing through the magnesium powder 12. A heat insulating pad 17 is provided at the end of the heat conducting pipe 7 sleeved inside the shell 1. The heating pipe 2 is sleeved in the heat conducting pipe 7, and the end of the heating pipe 2 away from the mounting flange 4 is connected with an insulating pad 13, and the heat loss and thermal damage to the end are reduced by the insulating pad 13. The surface of the sealing pad 11 is provided with a sealing groove 14, and a sealing gasket 15 is embedded and installed in the sealing groove 14. The sealing groove 14 is embedded and closely connected with one end of the heat conducting pipe 7. The sealing gasket 15 can enhance the sealing connection between the heating pipe 2 and the heat conducting pipe 7, thereby reducing the loss of heat. The outer surface of the mounting flange 4 is provided with a threaded portion 16 for screw connection, so that it is easy to install.

[0022] The specific use process of this embodiment is as follows: the heating wire 6 is spirally wound around the outer surface of the heating tube 2, the insulating pad 13 is installed in the heat conducting tube 7, the heating tube 2 is inserted into the heat conducting tube 7, the end of the heating tube 2 abuts against the insulating pad 13, the heating wire 6 contacts the inner wall of the heat conducting tube 7, the top ends of the heating tube 2 and the heat conducting tube 7 are both inserted and embedded in the sealing groove 14 of the sealing pad 11, so that they abut against the sealing gasket 15, and are sleeved in the shell 1, so that the heat conducting oil 8 is injected through the oil injection pipeline and enters the heat conducting cavity through the oil injection hole 9. One end of the heating tube 2 close to the mounting flange 4 extends to the outside of the shell to connect the wire 3. After power is supplied to the heating tube 2, the heating wire 6 is heated, and the electric heating tube can be quickly heated to the required temperature, which greatly shortens the heating time. The heating wire 6 is arranged between the heating tube 2 and the heat conducting tube 7, so that the heating wire 6 is in contact with the heat conducting tube 7, thereby further enhancing the heat conduction efficiency. The heat can be effectively conducted to the shell 1 through the heating wire 6 and the heat conducting oil 8, thereby improving the heat conduction efficiency and producing a uniform temperature distribution on the entire surface of the shell 1.

[0023] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A fast-heating electric heating tube comprises a shell and a heating tube arranged in the inner cavity of the shell, a guide pin is inserted into the interior of the heating tube, one end of the guide pin extends to one end of the shell and is connected to a wire, one end of the shell is connected to a mounting flange, and the other end of the shell is connected to a cover by arc welding, characterized in that: The outside of the heating tube is sleeved with a heating wire, which is spirally arranged on the outer surface of the heating tube. The outside of the heating tube is sleeved with a heat-conducting tube, and the heating wire is arranged between the heating tube and the heat-conducting tube and contacts the inner wall of the heat-conducting tube. A heat-conducting cavity is arranged inside the heat-conducting tube, and the heat-conducting cavity is filled with heat-conducting oil. An oil filling hole is arranged at one end of the heat-conducting cavity, and an oil filling channel corresponding to the oil filling hole is arranged inside the outer shell. The oil filling channel is connected and extends along the length direction of the outer shell, and a sealing gasket is embedded and installed at one end of the outer shell close to the mounting flange.

2. The electric heating tube with rapid temperature rise according to claim 1, characterized in that: The heat conducting pipe is coaxially sleeved and arranged inside the shell, and magnesium powder is filled between the outer surface of the heat conducting pipe and the inner surface of the shell.

3. The electric heating tube with rapid temperature rise according to claim 1, characterized in that: The heating tube is sleeved and arranged in the heat-conducting tube, and the end of the heating tube away from the mounting flange is connected with an insulating pad.

4. The fast-heating electric heating tube according to any one of claims 1 to 3, characterized in that: A sealing groove is provided on the surface of the sealing pad, a sealing gasket is embedded in the sealing groove, and the sealing groove is embedded and tightly connected with one end of the heat conducting pipe.

5. The fast-heating electric heating tube according to any one of claims 1 to 3, characterized in that: The outer surface of the mounting flange is provided with a threaded portion for threaded connection.

6. The fast-heating electric heating tube according to any one of claims 1 to 3, characterized in that: The end of the heat-conducting pipe sleeved inside the shell is provided with a heat-insulating pad.

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