Connecting structure of conductive rod and heating wire for steel pipe heater

Abstract

The utility model discloses a connecting structure of a current-conducting rod and a heating wire for a steel pipe heater, the heating wire is sleeved on a connecting end of the current-conducting rod connected with the heating wire, the connecting end is provided with an external thread section, and the heating wire can be screwed into the external thread section. Thus, the external thread is arranged on the external thread section, the heating wire in a spiral spring shape can be screwed into the external thread section, the heating wire is screwed into the connecting end of the conductive rod during connection, labor is saved during connection, the threads also play a blocking role, the heating wire can be prevented from slipping off from the conductive rod, and the problem that the steel pipe heater breaks down is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe heaters, in particular to a connection structure of a conductive rod and a heating wire for a steel pipe heater. Background Art

[0002] The steel pipe heater includes a heating pipe body, a conductive rod and a heating wire. The conductive rod is arranged in the heating pipe body. The first end of the conductive rod is connected to the heating wire and the second end is connected to the conductive wire. The conductive wire extends out of the pipe body and is connected to a power source. The power source supplies power to the heating wire to generate thermal energy for heating.

[0003] However, the current heating wire is generally in the shape of a spiral spring and is sleeved on one end of a conductive rod. When sleeved, it is mostly sleeved upward with force, which is not only laborious, but also easy to slip off the conductive rod during use, causing the steel pipe heater to malfunction. Utility Model Content

[0004] In order to solve the technical problems existing in the background technology, the utility model proposes a connection structure of a conductive rod and a heating wire for a steel pipe heater.

[0005] The utility model provides a connection structure of a conductive rod and a heating wire for a steel pipe heater. The heating wire is sleeved on a connection end of the conductive rod connected to the conductive rod. The connection end is provided with an external thread section, and the heating wire can be screwed into the external thread section.

[0006] Preferably, the external thread segment includes a head thread segment, a middle thread segment and a tail thread segment in sequence from the outer end to the inner end, and the thread outer diameter of the middle thread segment is greater than the thread outer diameter of the tail thread segment and greater than the thread outer diameter of the head thread segment.

[0007] Preferably, a tip guide segment is further provided on the connecting end, and the tail end of the tip guide segment is connected to the head end of the head thread segment.

[0008] Preferably, two opposite sides of the middle threaded section are respectively provided with pressing planes.

[0009] Preferably, the tail end of the tail threaded section is also connected to a tail guide section, and the tail guide section includes a cylindrical section and a frustum section, the head end of the cylindrical section is connected to the tail end of the tail threaded section, and the tail end is connected to the small diameter end of the frustum section, and the diameter of the large diameter end of the frustum section is equal to the diameter of the conductive rod.

[0010] To sum up, the utility model has the following beneficial effects: an external thread section is provided on the connecting end where the conductive rod and the heating wire are connected, and an external thread is provided on the external thread section. The spiral spring-shaped heating wire can be screwed into the external thread section. In this way, when connecting, the heating wire can be screwed into the connecting end of the conductive rod. Not only does the connection save effort, but the thread also acts as a barrier, which can prevent the heating wire from slipping off the conductive rod and avoid causing malfunctions of the steel pipe heater.

[0011] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a state diagram before the conductive rod and the heating wire of the steel pipe heater of the embodiment of the utility model are connected;

[0013] Figure 2 It is a schematic structural diagram of the connection end of the conductive rod according to an embodiment of the utility model.

[0014] In the figure:

[0015] 1. External thread section; 2. Heating wire; 3. Conductive rod; 4. Head thread section; 5. Middle thread section; 6. Tail thread section; 7. Tip guide section; 8. Cylindrical section; 9. Cone section. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0017] like Figure 1-2 As shown, this embodiment proposes a connection structure of a conductive rod and a heating wire for a steel pipe heater, wherein the heating wire 2 is sleeved on the connecting end of the conductive rod 3 connected to it, and an external thread section 1 is provided on the connecting end, and the heating wire 2 can be screwed into the external thread section 1.

[0018] In this way, an external thread is provided on the external thread section, and the spiral spring-shaped heating wire can be screwed into the external thread section. When connecting, the heating wire can be screwed into the connecting end of the conductive rod. Not only does the connection save effort, but the thread also acts as a barrier to prevent the heating wire from slipping off the conductive rod, thereby avoiding malfunctions of the steel pipe heater.

[0019] Furthermore, the external thread segment 1 includes a head thread segment 4, a middle thread segment 5 and a tail thread segment 6 in the direction from the outer end to the inner end, and the thread outer diameter of the middle thread segment 5> the thread outer diameter of the tail thread segment 6> the thread outer diameter of the head thread segment 4. The heating wire 2 is screwed into the head thread segment 4, the middle thread segment 5 and the tail thread segment 6 in sequence, and the outer diameter of the middle thread segment 5> the thread outer diameter of the head thread segment 4, which can prevent the heating wire 2 from slipping off the conductive rod 3. At the same time, in order to smoothly screw the heating wire 2 into the outside of the connection end, the thread outer diameter of the middle thread segment 5> the thread outer diameter of the tail thread segment 6, and the transition is more convenient. Specifically, the lengths of the head thread segment 4, the middle thread segment 5 and the tail thread segment 6 are determined according to actual conditions.

[0020] Furthermore, in order to facilitate the heating wire 2 to be screwed into the head thread section 4, a tip guide section 7 is provided on the connection end, and the tail end of the tip guide section 7 is connected to the head end of the head thread section 4. The heating wire 2 is first inserted into the tip guide section 7 and then screwed into the head thread section 4.

[0021] Among them, in order to facilitate the heating wire 2 to be screwed from the middle threaded section 5 into the tail threaded section 6, the middle threaded section 5 is provided with a pressing plane on both sides opposite to each other (not shown in the figure, that is, the top of the thread of the middle threaded section 5 is pressed into a plane on both sides opposite to each other) to reduce the resistance of the heating wire 2 to the spiral connection of the tail threaded section 6.

[0022] In this embodiment, Figure 2 As shown, the tail end of the tail threaded segment 6 is also connected to a tail guide segment, which includes a cylindrical segment 8 and a frustum segment 9. The head end of the cylindrical segment 8 is connected to the tail end of the tail threaded segment 6, and the tail end is connected to the small diameter end of the frustum segment 9. The diameter of the large diameter end of the frustum segment 9 is equal to the diameter of the conductive rod 3.

[0023] It should be noted that, in this embodiment, the direction from the outer end to the inner end of the external thread segment 1 refers to the direction from the outer end to the inner end along the axial direction of the conductive rod 3 .

[0024] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A connection structure of a conductive rod and a heating wire for a steel pipe heater, wherein the heating wire is sleeved on a connection end of the conductive rod and the conductive rod, characterized in that: An external thread section is provided on the connecting end, and the heating wire can be screwed into the external thread section. The external thread section includes a head thread section, a middle thread section and a tail thread section in sequence from the outer end to the inner end, and the thread outer diameter of the middle thread section is greater than the thread outer diameter of the tail thread section> the thread outer diameter of the head thread section.

2. The connection structure of the conductive rod and the heating wire for the steel pipe heater according to claim 1, characterized in that: The connecting end is also provided with a tip guide section, and the tail end of the tip guide section is connected to the head end of the head thread section.

3. The connection structure of the conductive rod and the heating wire for the steel pipe heater according to claim 2, characterized in that: The opposite sides of the middle threaded section are respectively provided with pressing planes.

4. The connection structure of the conductive rod and the heating wire for the steel pipe heater according to claim 3, characterized in that: The tail end of the tail threaded section is also connected to a tail guide section, and the tail guide section includes a cylindrical section and a frustum section. The head end of the cylindrical section is connected to the tail end of the tail threaded section, and the tail end is connected to the small diameter end of the frustum section. The diameter of the large diameter end of the frustum section is equal to the diameter of the conductive rod.

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