Heating tube for liquid heating device

Abstract

The present invention relates to the field of liquid heating devices, and in particular to a heating tube for a liquid heating device, comprising a heating tube and an electric wire for heating a liquid substance, wherein the electric wire is electrically connected to the heating tube, and the heating tube of the liquid heating device also comprises an extension piece whose length can be adjusted according to the depth of different heating containers, and a sealing assembly for encapsulating the extension piece, wherein one end of the extension piece is connected to the heating tube, and the other end is connected to the sealing assembly, and the electric wire can pass through the extension piece to reach the sealing assembly. Through the above-mentioned setting, the heating tube of the liquid heating device can change the length of the extension piece according to the container to be heated, and there is no need to place the entire heating tube in the liquid to be heated, and only the heating part needs to be placed in the liquid to be heated, thereby reducing the problem of dry burning.

Description

Technical Field

[0001] The invention relates to the field of liquid heating devices, in particular to a heating tube of a liquid heating device. Background Art

[0002] In daily life, we need to heat domestic water. In industrial production, some liquid raw materials need to be heated before processing. Liquid heating devices are frequently used in people's lives and work. Due to their convenient use and installation, pollution-free, and long service life, they are widely used in various heating occasions. For example, heating tubes can be widely used in power plants, petroleum, oil refining, oil production, chemical industry, machinery, military industry, aerospace and other industries. Don't look at a small heating device, it is indispensable in human society. The demand for liquid heating devices in the field of human society is still relatively large.

[0003] However, most of the heating tubes of existing liquid heating devices on the market pass through the heating water tank, and need to be designed completely according to the size of the tank. In addition, the part of the heating tube that is not submerged by the water level in the water tank is prone to dry burning, causing the electric heating tube to burn out, water ingress and leakage, seriously affecting its service life and safety performance. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a heating tube for a liquid heating device, which includes a heating tube and an electric wire for heating liquid substances, the electric wire being electrically connected to the heating tube, the heating tube of the liquid heating device also including an extension piece whose length can be adjusted according to the depth of different heating containers, and a sealing assembly for encapsulating the extension piece, one end of the extension piece is connected to the heating tube, and the other end is connected to the sealing assembly, the electric wire can pass through the extension piece to reach the sealing assembly, and through the above-mentioned setting, the heating tube of the liquid heating device can change the length of the extension piece according to the container to be heated, and the entire heating tube does not need to be placed in the liquid to be heated, only the heating part needs to be placed in the liquid to be heated, thereby reducing the problem of dry burning.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] A heating tube of a liquid heating device comprises a heating tube for heating liquid material and an electric wire, wherein the electric wire is electrically connected to the heating tube, and is characterized in that: the heating tube of the liquid heating device also comprises an extension piece whose length can be adjusted according to the depth of different heating containers, and a sealing assembly for encapsulating the extension piece, wherein one end of the extension piece is connected to the heating tube, and the other end is connected to the sealing assembly, and the electric wire can pass through the extension piece to reach the sealing assembly.

[0007] Furthermore, the extension piece is a hollow cylindrical tube, and the wire passes through the inside of the tube.

[0008] Furthermore, the sealing assembly includes a flange and a connecting piece for preventing fluid from entering the extension piece, the flange is arranged at one end of the extension piece, and the connecting piece is installed at the upper end of the flange.

[0009] Furthermore, the connecting piece is provided with an opening for facilitating the passage of the electric wire, and the connecting piece is filled with rubber.

[0010] Furthermore, the heating tube includes a heating tube body, a heating component for heating, and a sealing component for encapsulating the heating component in the heating tube body, the inner wall of the heating tube body is coated with an electric heating film, the heating component is placed in the heating tube body, and the sealing component is installed at the opening of the heating tube body.

[0011] Furthermore, the heating component includes a conductive terminal, a heating wire and a retaining spring, the retaining spring is arranged on the heating wire, is sleeved in the heating tube body and is attached to the electric heating film, and the heating wire is connected to the conductive terminal.

[0012] Furthermore, the sealing assembly includes a cylindrical cavity, an insulating member for fixing and supporting the conductive terminal, and a sealing member for connecting the heating tube body, the insulating member is installed on the top of the cylindrical cavity, and the sealing member is tightly connected to the insulating member and installed on the bottom of the cylindrical cavity.

[0013] Furthermore, the heating tube also includes a drain pipe, the insulating component is provided with a drainage hole, the drainage hole is connected to the drain pipe, the sealing component is provided with a first through hole, the drainage hole is connected to the drain pipe, and gas and fluid can pass through the sealing assembly through the first through hole, the drainage hole and the drain pipe.

[0014] Furthermore, the heating tube of the liquid heating device also includes a protective member for protecting the heating tube body, and the protective member is sleeved on the outside of the heating tube body, so that the liquid to be heated can directly contact the heating tube body.

[0015] Furthermore, the protective member is a hollow cylinder, and is provided with honeycomb-shaped through holes for facilitating the circulation of the liquid to be heated.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The heating tube of the liquid heating device of the present invention comprises a heating tube and an electric wire for heating liquid substances, wherein the electric wire is electrically connected to the heating tube, and the heating tube of the liquid heating device further comprises an extension piece whose length can be adjusted according to the depth of different heating containers, and a sealing assembly for encapsulating the extension piece, wherein one end of the extension piece is connected to the heating tube, and the other end is connected to the sealing assembly, and the electric wire can pass through the extension piece to reach the sealing assembly. Through the above-mentioned setting, the heating tube of the liquid heating device can change the length of the extension piece according to the container to be heated, and there is no need to place the entire heating tube in the liquid to be heated, and only the heating part needs to be placed in the liquid to be heated, thereby reducing the problem of dry burning. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an exploded view of a preferred embodiment of a heating tube of a liquid heating device of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a preferred embodiment of a heating tube of a liquid heating device of the present invention;

[0020] Figure 3 It is a structural schematic diagram of a preferred embodiment of an insulating member of the present invention;

[0021] Figure 4 It is a structural schematic diagram of a preferred embodiment of the sealing member of the present invention;

[0022] Figure 5 is a cross-sectional view of a preferred embodiment of the seal of the present invention;

[0023] Figure 6 It is a schematic structural diagram of a preferred embodiment of the connecting piece of the present invention.

[0024] In the figure: 1. heating tube of liquid heating device; 2. heating tube; 21. heating tube body; 22. sealing assembly; 221. cylindrical cavity; 222. insulating member; 2221. drainage hole; 2222. positioning portion; 2223. fixing portion; 2224. blocking portion; 223. sealing member; 2231. first through hole; 2232. second through hole; 2233. stripe; 23. protective member; 3. extension member; 4. sealing assembly; 41. flange; 42. connecting member. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0026] The heating tube 1 of the liquid heating device of the present invention is as follows Figure 1-6As shown, the heating tube 2 for heating liquid substances and the wire are electrically connected to the heating tube 2. The heating tube 1 of the liquid heating device also includes an extension piece 3 whose length can be adjusted according to the depth of different heating containers and a sealing assembly 4 for encapsulating the extension piece 3. One end of the extension piece 3 is connected to the heating tube 2, and the other end is connected to the sealing assembly 4. The wire can pass through the extension piece 3 to reach the sealing assembly 4. The extension piece 3 is a hollow cylindrical tube body, and the extension piece 3 can be a single component or a plurality of extension pieces 3 spliced ​​together. The sealing assembly 4 includes a flange 41 and a connector 42 for preventing fluid from entering the extension piece 3. The flange 41 is provided at one end of the extension piece 3, and the connector 42 is installed at the upper end of the flange 41. The four ends of the flange 41 are also provided with four third through holes for connection and fixing, so as to facilitate the installation or connection of the heating tube 1 of the liquid heating device to other devices or structures. After the wire passes through the tube body of the extension piece 3, it passes through the flange 41 and passes out along the opening of the connector 42. At this time, the connector 42 is installed on the flange 41, and then the connector 42 is filled with rubber, which not only fixes the wire but also isolates water vapor from entering the extension piece 3. By setting the heating tube 1 of the liquid heating device as described above, the length of the extension piece 3 can be changed according to the container to be heated. There is no need to place the entire heating tube 2 in the liquid to be heated. Only the heating part needs to be placed in the liquid to be heated, which reduces the problem of dry burning.

[0027] In this embodiment, the heating tube 2 includes a heating tube body 21, a heating component for heating liquid substances, and a sealing component 22 for encapsulating the heating component in the heating tube body 21. The inner wall of the heating tube body 21 is coated with an electric heating film, the heating component is placed in the heating tube body 21, and the sealing component 22 is installed at the opening of the heating tube body 21. The heating tube body 21 is a cylindrical tube body with one end being closed in a hemispherical shape and the other end being open; the heating component includes a conductive terminal, a heating wire and a retaining spring, and the retaining spring is arranged on the heating wire and is sleeved on the heating tube body. 21 and fitted with the electric heating film, one end of the conductive terminal is connected to the heating wire, and the other end is connected to the electric wire; the sealing component 22 includes a cylindrical cavity 221, an insulating member 222 for fixing and supporting the conductive terminal, and a sealing member 223 for connecting the heating tube body 21, the insulating member 222 is installed on the top of the cylindrical cavity 221, the top of the sealing member 223 is tightly attached to the bottom of the insulating member 222, and is installed on the bottom of the cylindrical cavity 221. This design leaves no cavity between the sealing member 223 and the insulating member 222, and the heating tube 2 has better sealing performance.

[0028] The heating tube 2 also includes a protective member 23 for protecting the heating tube body 21. The protective member 23 is sleeved on the outside of the heating tube body 21. The protective member 23 is made of metal. Since the metal itself has a high hardness, the protective effect is good, and it has good thermal conductivity and does not affect the heat transfer. The protective member 23 is a hollow cylinder. The protective member 23 is also provided with honeycomb through holes for convenient circulation of the liquid to be heated. The liquid to be heated can directly contact the heating tube body 21. The heat generated by the heating tube 2 can be well transferred to the liquid to be heated. While achieving the original heating effect, the protective effect is better. The heating tube 1 with the above-mentioned liquid heating device is safer and does not affect the existing heating effect. The heating tube body 21 will no longer be easily bumped and damaged, which can reduce unnecessary cost losses.

[0029] The insulating part 222 and the cylindrical cavity 221 are spliced ​​to form a first annular groove. The bottom of the extension part 3 is provided with an external thread, and the inner wall of the top of the cylindrical cavity 221 is provided with an internal thread that cooperates with the external thread. The cylindrical cavity 221 realizes the connection between the cylindrical cavity 221 and the extension part 3 through the cooperation of the internal and external threads.

[0030] The insulating member 222 is provided with a drainage hole 2221, and the sealing member 223 is provided with a first through hole 2231, and gas and fluid can pass through the heating tube 1 of the liquid heating device through the drainage hole 2221 and the first through hole 2231. The heating tube 1 of the liquid heating device also includes a drain pipe, and the drainage hole 2221 is connected to the drain pipe, and gas and fluid can pass through the drain pipe. Through the above-mentioned design, during the heating process of the heating tube 1 of the liquid heating device, when the gas in the heating tube body 21 is heated and expanded, it can be discharged from the heating tube 2 along the drain pipe through the first through hole 2231 and the drainage hole 2221 in sequence. When not heated, when the heating tube body 21 shrinks back to its original shape, the gas re-enters the tube body along the drain pipe; when the heating tube body 21 is accidentally broken, the heated fluid can also be discharged along the drain pipe through the first through hole 2231 and the drainage hole 2221 in sequence, and will not spray out and scald the staff, which is safer.

[0031] The side of the insulating member 222 that contacts the sealing member 223 is also provided with a positioning portion 2222 for facilitating the docking of the drainage hole 2221 and the first through hole 2231. When the insulating member 222 and the sealing member 223 are installed, the drainage hole 2221 and the first through hole 2231 can be connected and matched through the positioning portion 2222, and the drainage hole 2221 and the first through hole 2231 will not be disconnected. The insulating member 222 is also provided with a fixing portion 2223 for supporting and fixing the conductive terminal, so that the conductive terminal will not fall off easily, and the connection is more stable; the side wall of the blocking portion 2224 is close to the inner wall of the cylindrical cavity 221. When installing, the insulating member 222 is pushed in along the inner wall of the cylindrical cavity 221, and the sealing is stronger.

[0032] The outer wall of the seal 223 is in close contact with the inner wall of the cylindrical cavity 221. The inner and outer walls of the seal 223 are both provided with stripes 2233 for enhancing friction. Whether the inner wall is connected to the heating tube body 21 or the outer wall is connected to the cylindrical cavity 221, friction can be increased to prevent the seal 223 from separating and falling off, thereby increasing the firmness of the connection. The seal 223 is provided with a second through hole 2232 for facilitating the passage of the heating wire and a second annular groove for matching with the heating tube body 21. The heating wire can be connected to the conductive terminal after passing through the second through hole 2232, and the heating tube body 21 can cooperate with the second annular groove and be clamped on the seal 223. The seal 223 is made of insulating material, which has a better protective safety effect.

[0033] During installation, first connect the heating wire and the retaining spring, and pass the heating wire with the retaining spring through the second through hole 2232 of the seal 223, then insert the heating component into the tube body at the open end of the heating tube body 21, and then push it into the second annular groove of the seal 223 to complete the connection between the heating tube body 21 and the seal 223.

[0034] At this time, push the insulating part 222 connected to the conductive terminal along the inner wall of the cylindrical cavity 221, and then align the first through hole 2231 of the sealing part 223 connected to the heating tube body 21 with the positioning part 2222 of the insulating part 222 and push it in to press the sealing part 223, and then press the insulating part 222 to the top limit position to fix the insulating part 222. At this time, the heating wire is connected to the conductive terminal to complete the connection and installation of the sealing component 22 and the heating component.

[0035] When the cylindrical cavity 221 clamps the insulating part 222, a first annular groove is formed. After the connection between the wire and the conductive terminal, the drainage hole 2221 and the drain pipe is completed, the wire and the drain pipe can be passed through the opening of the extension piece 3, and then the extension piece 3 is aligned with the first annular groove and rotated to be fixed to the cylindrical cavity 221. Finally, the flange 41 is rotated to be fixed to the other end of the extension piece 3, and then the connecting piece 42 is fixed to the flange 41, and the internal cavity of the connecting piece 42 is filled with rubber to form a double seal, which not only plays a role of fixing and protection, but also achieves the effect of preventing leakage.

[0036] Finally, the protective member 23 is inserted into the heating tube body 21 , so that the heating tube body 21 is no longer exposed to the outside and will not be easily bumped, thereby achieving protection of the heating tube body 21 .

[0037] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A heating tube of a liquid heating device, comprising a heating tube for heating a liquid substance and an electric wire, wherein the electric wire is electrically connected to the heating tube, and characterized in that: The heating pipe of the liquid heating device further comprises an extension piece whose length can be adjusted according to the depth of different heating containers and a sealing assembly for encapsulating the extension piece, one end of the extension piece is connected to the heating pipe, and the other end is connected to the sealing assembly, and the wire can pass through the extension piece to reach the sealing assembly; The sealing assembly comprises a flange and a connecting piece for preventing fluid from entering the extension piece, the flange is arranged at one end of the extension piece, and the connecting piece is installed at the upper end of the flange; The outer wall of the seal is in close contact with the inner wall of the cylindrical cavity, and stripes for enhancing friction are provided on the inner and outer walls of the seal; The heating tube comprises a heating tube body, a heating component for heating, and a sealing component for sealing the heating component in the heating tube body, the inner wall of the heating tube body is coated with an electric heating film, the heating component is placed in the heating tube body, and the sealing component is installed at the opening of the heating tube body; The heating component includes a conductive terminal, a heating wire and a clip spring, wherein the clip spring is arranged on the heating wire, is sleeved in the heating tube body and is attached to the electric heating film, and the heating wire is connected to the conductive terminal; The sealing assembly includes a cylindrical cavity, an insulating member for fixing and supporting the conductive terminal, and a sealing member for connecting the heating tube body, the insulating member is installed on the top of the cylindrical cavity, and the sealing member is tightly connected to the insulating member and installed on the bottom of the cylindrical cavity; The heating tube also includes a drain pipe, the insulating member is provided with a drain hole, the drain hole is connected to the drain pipe, the sealing member is provided with a first through hole, the drain hole is connected to the drain pipe, and the gas inside the heating tube body can be discharged through the drain hole, the first through hole and the drain pipe through the sealing assembly after being heated. When the heating tube body is broken, the heated fluid can be discharged through the drain hole, the first through hole and the drain pipe through the sealing assembly.

2. The heating tube of the liquid heating device according to claim 1, characterized in that: The connecting piece is provided with an opening for facilitating the passage of the electric wire, and the connecting piece is filled with rubber.

3. The heating tube of the liquid heating device according to claim 1, characterized in that: The heating tube of the liquid heating device further comprises a protective member for protecting the heating tube body. The protective member is sleeved on the outside of the heating tube body, and the liquid to be heated can directly contact the heating tube body.

4. The heating tube of the liquid heating device according to claim 3, characterized in that: The protective member is a hollow cylinder and is provided with honeycomb-shaped through holes for facilitating the circulation of the liquid to be heated.

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