CN217546332U - Heating rod - Google Patents

Abstract

The utility model discloses a heating rod, including heating tube and air duct, be provided with electric heating element in the heating tube hermetically, electric heating element passes through the wire and is connected with the outside electric wire electricity that has insulating sheath, the one end of air duct inserts in the heating tube hermetically, the other end of air duct inserts outside electric wire in the insulating sheath. The utility model provides a heating rod has not only solved the heating rod in the problem of the unexpected dry combustion method explosion aloft, has solved the too little problem that big wattage omniseal heating rod can not design because of interior pressure reason moreover.

Description

A kind of heating rod

Technical Field

The utility model relates to a firing equipment technical field especially relates to a heating rod.

Background

The heating rod used in water needs to be fully sealed and waterproof, and the internal pressure of the existing fully sealed heating rod can be increased due to the expansion of internal gas in the working process. When the existing heating rod, particularly the heating rod with the wattage higher than 500W, is dried and burned in the air, because an internal temperature protection device (an overheat protector and a temperature fuse) does not act so fast, the protection is usually required to be carried out within 3-5 minutes, and under the condition, the heating tube is easy to explode due to the fact that the heating tube cannot bear internal pressure after the heating tube is dried and burned within 3-5 minutes; the problem of withstanding high internal pressures is further compounded by the fact that current heating rods cannot be designed to be too small.

It is noted that the information disclosed in the above background section is only for understanding of the background of the present application and therefore may include information that does not constitute prior art that is known to a person of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

The main object of the present invention is to overcome the above-mentioned drawbacks of the background art, and to provide a heating rod.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses a heating rod, including heating tube and air duct, be provided with electric heating element in the heating tube hermetically, electric heating element passes through the wire and is connected with the outside electric wire electricity that has insulating sheath, the one end of air duct inserts hermetically in the heating tube, the other end of air duct inserts outside electric wire in the insulating sheath.

Furthermore, the external electric wire is a multi-core wire, and the air duct and the multiple core wires of the external electric wire are combined into a bundle and are jointly accommodated in the insulating sheath.

Further, the outer end of the external wire may or may not have a plug.

Further, the air duct is a Teflon tube.

Further, the external wire is a VCTFK wire.

Further, the heating tube is filled with heat conducting sand at the electric heating element.

Furthermore, a middle bolt is fixedly arranged in the heating tube, the electric heating element is positioned on the inner side of the middle bolt, and the lead and the air duct extend outwards through a hole in the middle bolt and are supported and fixed by the middle bolt.

Further, the heating tube is provided with an opening sealed by pouring sealant, and the conducting wire and the air duct extend out of the heating tube through the opening.

Further, the heating tube is a quartz tube.

Furthermore, the heating rod further comprises a shell, wherein the shell is provided with water inlet and outlet holes, and one or more heating pipes are arranged in the shell.

The utility model discloses following beneficial effect has: the heating rod provided by the utility model is provided with the air duct, one end of the air duct is hermetically connected into the heating tube, and the other end is inserted into the insulating sheath of the external electric wire, so that the gas in the heating tube can be decompressed along the external electric wire through the air duct when the electric heating element generates heat; on one hand, the problem of accidental dry-burning explosion of the heating rod in the air is solved, and on the other hand, the problem that the large-wattage full-sealed heating rod cannot be designed to be too small due to the internal pressure is also solved.

Drawings

Fig. 1 is a schematic sectional structure view of a heating pipe according to a preferred embodiment of the present invention;

fig. 2 is a schematic view of the internal structure of a heating pipe according to a preferred embodiment of the present invention;

fig. 3 is a schematic view of the heating pipe of the preferred embodiment of the present invention, both ends of which are sealed by the potting adhesive.

Detailed Description

The following describes embodiments of the present invention in detail. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection can be for fixation or for coupling or communication.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The conventional heating rod is dry-fired under the condition of high wattage, so that the heating tube cannot bear internal pressure and explosion is caused easily, and in order to avoid the condition, the method of lengthening the heating rod as much as possible in the prior art can be adopted to reduce the internal heat of the heating tube so as to reduce the internal pressure. The utility model discloses through add the air duct in the heating rod in the preferred embodiment to make the one end of air duct insert the heating tube in sealed, the other end inserts in the insulating cover of outside electric wire in order to carry out the pressure release, thereby solved the problem of the air unexpected dry combustion method explosion of heating rod, also solved big wattage totally enclosed heating rod because interior pressure reason can not design too little problem.

Referring to fig. 1 and 2, a preferred embodiment of the present invention provides a heating rod, which includes a heating tube 10 and an air duct 20, wherein an electric heating element (not shown, for example, a heating wire) is hermetically disposed in the heating tube 10, the electric heating element is electrically connected to an external electric wire 40 having an insulating sheath 41 through a conducting wire 30 (the air duct 20 is clearly illustrated in the drawing, and a part of the conducting wire 30 between the heating tube 10 and the external electric wire 40 is omitted), one end of the air duct 20 is hermetically connected into the heating tube 10, and the other end of the air duct 20 is inserted into the insulating sheath 41 of the external electric wire 40.

Specifically, the external electric wire 40 is a multi-core wire (more than 2 cores), the air duct 20 and a plurality of core wires 42 of the external electric wire 40 are combined into a bundle and are accommodated in the insulating sheath 41 together; in the specific embodiment, the external electric wire 40 can include 2 or more than 2 heart yearns 42, and each heart yearn 42 is gapped, the utility model discloses preferred embodiment is to insert at least one air duct 20 in the clearance between each heart yearn 42, realizes the pressure release through this at least one air duct 20, has avoided the risk that the heating tube 10 takes place to explode the pipe. In some embodiments, airway tube 20 is a teflon tube, for example, a teflon tube with a diameter of 1mm and a wall thickness of 0.2mm or more can be conveniently inserted between core wires 42 in insulating sheath 41, and in other embodiments, airway tube 20 can be made of other materials. The external end of the external wire 40 may or may not have a plug, and preferably, the external wire 40 is a VCTFK wire.

In a preferred embodiment, the heating tube 10 is filled with heat conducting sand (not shown) at the position of an electric heating element (such as a heating wire) so that the electric heating element can accelerate heat dissipation when working to generate heat; the heating tube 10 is internally and fixedly provided with a middle bolt 11, the electric heating element is positioned at the inner side of the middle bolt 11, and the lead 30 and the air duct 20 extend outwards through a hole on the middle bolt 11 and are supported and fixed by the middle bolt 11.

As shown in fig. 3, the heating tube 10 has an opening 12 sealed by a potting adhesive 50, and the lead 30 and the air duct 20 extend out of the heating tube 10 through the opening 12. In the present embodiment, the potting adhesive 50 is respectively filled at two ends of the heating tube 10, and the potting adhesive 50 is filled in a predetermined region (for example, the predetermined region may be a region surrounded by the baffle 70) between the opening 12 of the heating tube 10 and the end of the external electric wire 40, so as to ensure the sealing property inside the heating tube 10. Wherein, the heat generating tube 10 may be a quartz tube 100.

In a preferred embodiment, the heating rod further comprises a housing 60, the housing 60 has water inlet and outlet holes 61, one or more heat generating tubes 10 are disposed in the housing 60, for example, two heat generating tubes 10 are disposed in the housing 60 of the heating rod shown in fig. 1 to 3.

The utility model discloses preferred embodiment's heating rod's theory of operation is: when the heating rod works, the interior of the heating tube 10 generates heat, the internal gas expands to generate internal pressure, and the internal gas can be guided into the insulating sheath 41 by the gas guide tube 20; wherein, when the outer end of the external electric wire 40 is not provided with the plug, the internal gas is conducted to the air through the external electric wire 40; when the outer end of the outer electric wire 40 is provided with a plug, although the internal gas cannot be conducted into the air, the gap between the insulating sheath 41 and the core wire 42 can contain most of the gas without risk of tube explosion. Therefore, a large internal pressure is not generated inside the heat generating tube 10 regardless of whether the plug is provided outside the external electric wire 40 or not, and thus there is no fear of a risk of tube explosion regardless of the miniaturized design or the dry combustion.

The heating rod is used in water, so the heating rod is sealed and waterproof, however, the internal pressure generated by the expansion of the internal gas in the working process of the fully sealed heating rod is increased, and explosion can occur under the condition that the internal pressure is continuously increased during air dry burning. The utility model discloses the heating rod that preferred embodiment provided, interior pressure can be released to need not to consider the problem of interior pressure again when designing big wattage heating rod, make the length and size of its design can be shorter, and it has saved material cost and has still made the product smaller and more exquisite, and is with low costs and assemble simply.

The background section of the present invention may contain background information related to the problems or the environment of the present invention and is not necessarily descriptive of the prior art. Accordingly, the inclusion in this background section is not an admission by the applicant that prior art is available.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific/preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. For those skilled in the art to which the present invention pertains, a plurality of alternatives or modifications can be made to the described embodiments without departing from the concept of the present invention, and these alternatives or modifications should be considered as belonging to the protection scope of the present invention. In the description herein, references to the description of the term "one embodiment," "some embodiments," "preferred embodiments," "an example," "a specific example," or "some examples" or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Those skilled in the art will be able to combine and combine features of different embodiments or examples and features of different embodiments or examples described in this specification without contradiction. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the claims.

Claims (10)

1. The heating rod is characterized by further comprising an air guide tube, one end of the air guide tube is connected into the heating tube in a sealing mode, and the other end of the air guide tube is inserted into the insulating sheath of the external electric wire.

2. The heating rod as claimed in claim 1, wherein the external electric wire is a multi-core wire, and the air duct and the plurality of core wires of the external electric wire are combined into a bundle and accommodated together in the insulating sheath.

3. A heating rod as claimed in claim 1, wherein the external electric wire has a plug at its outer end or no plug.

4. A heater rod according to any one of claims 1 to 3, wherein the gas-conducting tube is a teflon tube.

5. A heater rod according to any one of claims 1 to 3, wherein the external wire is a VCTFK wire.

6. A heating rod according to any one of claims 1 to 3, wherein the heat generating tube is filled with heat conductive sand at the electric heating element.

7. A heating rod according to any one of claims 1 to 3, wherein a central plug is fixedly arranged in the heating tube, the electric heating element is positioned at the inner side of the central plug, and the lead and the air duct extend outwards through a hole on the central plug and are supported and fixed by the central plug.

8. A heater rod according to any one of claims 1 to 3, wherein the heater tube has an opening sealed by a potting compound, the lead and the gas-guide tube extending out of the heater tube through the opening.

9. A heating rod according to any one of claims 1 to 3, wherein the heat generating tube is a quartz tube.

10. A heating rod according to any one of claims 1 to 3, further comprising a housing having water inlet and outlet holes therein, the housing having one or more of the heat generating tubes disposed therein.

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