An electric heating tube lead rod

Abstract

The utility model discloses a kind of outgoing rods for electric heating tube, including outgoing rod, electric heating tube and heating wire, the electric heating tube is sleeved in the outer wall of outgoing rod, connecting assembly is arranged between the heating wire and outgoing rod, the connecting assembly includes fixed cylinder, multiple fixed cylinders are annular array and are set in the inner chamber of electric heating tube, the inner chamber of fixed cylinder is provided with spring, one end of the spring is tightly provided with telescopic rod, the telescopic rod is slidably connected in the inner chamber of fixed cylinder, the bottom of multiple fixed cylinders is fixedly provided with connecting frame, the heating wire is wound in the bottom of connecting frame, the telescopic rod is tightly in the bottom end taper surface of outgoing rod. The utility model relates to the technical field of electric heating tube, the outgoing rod of the utility model utilizes the winding type connection of connecting frame and heating wire, and under the action of spring, outgoing rod can always maintain stable contact with multiple telescopic rods after being fixed, and then avoid the unstable situation of wire between outgoing rod and heating wire.

Description

Technical Field

[0001] This utility model relates to the technical field of electric heating tubes, specifically a lead-out rod for an electric heating tube. Background Technology

[0002] Electric heating is the process of converting electrical energy into heat energy. Since the discovery that a power source can generate a heating effect through a wire, many inventors around the world have been engaged in the research and manufacture of various electric heating appliances. An electric heating element consists of a resistance wire and lead-out rods connected to both ends of the resistance wire. However, current methods of connecting the resistance wire and lead-out rods by welding can lead to short circuits and easy detachment when the temperature is too high. Furthermore, disassembling the lead-out rods is inconvenient when inspecting the electric heating element, resulting in limited practicality.

[0003] According to the Chinese Patent Publication No. CN217335944U, entitled "A Lead-Out Rod for an Electric Heating Element," the aforementioned document describes a method where the heating wire is wound inside a winding groove, and the lead-out rod and the heating wire are electrically connected through a locking block and a fixing groove. However, if the winding is improper, the locking block may have difficulty entering the fixing groove, and this locking method is prone to short circuits, thus affecting the use of the electric heating element. Therefore, we provide a lead-out rod for an electric heating element to solve the above problems. Utility Model Content

[0004] To solve the above problems, namely the problems mentioned in the background art, this utility model proposes an lead-out rod for an electric heating tube, including a lead-out rod, an electric heating tube, and an electric heating wire. The electric heating tube is sleeved on the outer wall of the lead-out rod, the electric heating wire is disposed in the inner cavity of the electric heating tube, a connecting component is provided between the electric heating wire and the lead-out rod, the inner cavity of the electric heating tube is filled with filling powder, and an insulating sealing block is provided at the end of the electric heating tube. The connecting assembly includes a fixed cylinder, and multiple fixed cylinders are arranged in a ring array inside the cavity of the electric heating tube. A spring is provided inside the cavity of the fixed cylinder, and one end of the spring abuts against a telescopic rod. The telescopic rod is slidably connected to the cavity of the fixed cylinder. A connecting frame is fixedly provided at the bottom of the multiple fixed cylinders. The electric heating wire is wound around the bottom of the connecting frame, and the telescopic rod abuts against the bottom conical surface of the lead-out rod.

[0005] Preferably, the insulating sealing block is sleeved on the outer wall of the lead-out rod, and the lead-out rod is integrally formed with two limiting rings below the insulating sealing block. The top limiting ring is pressed against the bottom end of the insulating sealing block, and the electric heating tube is fixedly provided with multiple locking blocks below the bottom limiting ring. The bottom limiting ring is pressed against the top of the locking block.

[0006] Preferably, the inner cavity of the fixed cylinder has a convex cross-section, and the telescopic rod is adapted to the fixed cylinder, thereby controlling the limit telescopic distance of the telescopic rod.

[0007] Preferably, a fuse is provided at the top of the outer wall of the lead-out rod.

[0008] Preferably, a plurality of heat sinks are fixedly provided on the outer wall of the electric heating tube, and the plurality of heat sinks are distributed at equal intervals.

[0009] The beneficial technical effects of this utility model are as follows: the lead-out rod is connected to the heating wire by a connecting frame and under the action of the spring, so that the lead-out rod can always maintain stable contact with multiple telescopic rods after it is fixed, thereby avoiding the situation of unstable wires between the lead-out rod and the heating wire. Attached Figure Description

[0010] Figure 1 A cross-sectional structural schematic diagram of the present invention is shown.

[0011] The attached diagram includes the following reference numerals: 1. Lead-out rod; 11. Limiting ring; 12. Fuse; 2. Electric heating tube; 21. Locking block; 3. Heating wire; 4. Connecting assembly; 41. Fixing cylinder; 42. Spring; 43. Telescopic rod; 44. Connecting frame; 5. Insulating sealing block; 6. Filling powder; 7. Heat sink. Detailed Implementation

[0012] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0013] This utility model proposes an lead-out rod for an electric heating tube, including a lead-out rod 1, an electric heating tube 2, and an electric heating wire 3. The electric heating tube 2 is sleeved on the outer wall of the lead-out rod 1, and the electric heating wire 3 is disposed in the inner cavity of the electric heating tube 2. A connecting component 4 is provided between the electric heating wire 3 and the lead-out rod 1. The inner cavity of the electric heating tube 2 is filled with a filling powder 6, which is usually magnesium oxide. This part is prior art and will not be described in detail here. An insulating sealing block 5 is provided at the end of the electric heating tube 2. The insulating sealing block 5 can not only seal the magnesium oxide, but also fix the position of the lead-out rod 1 and achieve the effect of insulation. The connecting assembly 4 includes a fixed cylinder 41. Multiple fixed cylinders 41 are arranged in a ring array in the inner cavity of the electric heating tube 2. The number of fixed cylinders 41 is set to four. A spring 42 is provided in the inner cavity of the fixed cylinder 41. One end of the spring 42 abuts against a telescopic rod 43. The telescopic rod 43 is slidably connected to the inner cavity of the fixed cylinder 41. A connecting frame 44 is fixedly provided at the bottom of the multiple fixed cylinders 41. The electric heating wire 3 is wound around the bottom of the connecting frame 44. The telescopic rod 43 abuts against the bottom conical surface of the lead-out rod 1.

[0014] By using the connecting bracket 44 to the heating wire 3 in a winding connection, and under the action of the spring 42, the lead rod 1 can always maintain stable contact with multiple telescopic rods 43 after it is fixed, thereby avoiding the situation of unstable wires between the lead rod 1 and the heating wire 3.

[0015] It should also be noted that an insulating gasket is fixed between the fixed cylinder 41 and the electric heating tube 2, and the locking block 21 is also made of insulating material, which can be epoxy resin, silicone oil / silicone, glass, etc., depending on actual needs. In order to allow the telescopic rod 43 to make better contact with the conical surface of the lead-out rod 1, the pressing end of the telescopic rod 43 is adapted to the conical surface of the lead-out rod 1 and has an inclined arc design to ensure the contact area with the lead-out rod 1.

[0016] Specifically, the insulating sealing block 5 is sleeved on the outer wall of the lead-out rod 1. The lead-out rod 1 is located below the insulating sealing block 5 and has two integrally formed limiting rings 11. The top limiting ring 11 is pressed against the bottom end of the insulating sealing block 5. The electric heating tube 2 is located below the bottom limiting ring 11 and has multiple locking blocks 21 fixedly installed. The bottom limiting ring 11 is pressed against the top of the locking block 21. The purpose of this design is that after the insulating sealing block 5 is tightened, the lead-out rod 1 can be fixed in the inner cavity of the electric heating tube 2.

[0017] Specifically, the inner cavity of the fixed cylinder 41 has a convex cross-section, and the telescopic rod 43 is adapted to the fixed cylinder 41, thereby controlling the limit extension distance of the telescopic rod 43 and ensuring the linear movement of the telescopic rod 43.

[0018] Specifically, a fuse 12 is provided on the top of the outer wall of the lead-out rod 1, and several heat sinks 7 are fixedly provided on the outer wall of the electric heating tube 2. The heat sinks 7 are evenly distributed to accelerate the heat transfer efficiency.

[0019] Working principle: When installing the lead-out rod 1, the operator can insert the lead-out rod 1 into the inner cavity of the electric heating tube 2 until the limiting ring 11 contacts the locking block 21. At this time, due to the downward pressure of the lead-out rod 1, the telescopic rod 43 enters the inner cavity of the fixed cylinder 41, and under the action of the spring 42, the telescopic rod 43 can make close contact with the lead-out rod 1. Then, the filling powder 6 is filled into the electric heating tube 2. Finally, the insulating sealing block 5 is sleeved on the outer wall of the lead-out rod 1, and the insulating sealing block 5 is threaded to the electric heating tube 2 until the insulating sealing block 5 is tightened on the electric heating tube 2. At this time, the overall connection of the electric heating tube 2 is completed. This connection method not only replaces the original welding connection and snap-fit ​​connection, but also ensures the connection stability between the lead-out rod 1 and the electric heating wire 3.

[0020] Although the present invention has been described with reference to preferred embodiments, various modifications can be made to it and components can be replaced with equivalents without departing from the scope of the present invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0021] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0024] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A lead-out rod for an electric heating element, characterized in that: It includes an lead-out rod (1), an electric heating tube (2) and an electric heating wire (3). The electric heating tube (2) is sleeved on the outer wall of the lead-out rod (1), the electric heating wire (3) is disposed in the inner cavity of the electric heating tube (2), a connecting component (4) is provided between the electric heating wire (3) and the lead-out rod (1), the inner cavity of the electric heating tube (2) is filled with filling powder (6), and an insulating sealing block (5) is provided at the end of the electric heating tube (2). The connecting assembly (4) includes a fixed cylinder (41), and multiple fixed cylinders (41) are arranged in a ring array in the inner cavity of the electric heating tube (2). A spring (42) is provided in the inner cavity of the fixed cylinder (41), and one end of the spring (42) is pressed against a telescopic rod (43). The telescopic rod (43) is slidably connected to the inner cavity of the fixed cylinder (41). A connecting frame (44) is fixedly provided at the bottom of the multiple fixed cylinders (41). The electric heating wire (3) is wound around the bottom of the connecting frame (44), and the telescopic rod (43) is pressed against the bottom conical surface of the lead-out rod (1).

2. The lead-out rod for an electric heating tube according to claim 1, characterized in that: The insulating sealing block (5) is sleeved on the outer wall of the lead-out rod (1). The lead-out rod (1) is located below the insulating sealing block (5) and has two integrally formed limiting rings (11). The top limiting ring (11) is pressed against the bottom end of the insulating sealing block (5). The electric heating tube (2) is located below the bottom limiting ring (11) and has multiple locking blocks (21) fixedly installed. The bottom limiting ring (11) is pressed against the top of the locking block (21).

3. The lead-out rod for an electric heating tube according to claim 1, characterized in that: The inner cavity of the fixed cylinder (41) has a convex cross-section, and the telescopic rod (43) is adapted to the fixed cylinder (41) to control the limit telescopic distance of the telescopic rod (43).

4. The lead-out rod for an electric heating tube according to claim 1, characterized in that: A fuse (12) is provided on the top of the outer wall of the lead-out rod (1).

5. The lead-out rod for an electric heating tube according to claim 1, characterized in that: The outer wall of the electric heating tube (2) is fixedly provided with a number of heat sinks (7), and the number of heat sinks (7) are distributed at equal intervals.

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