Tungsten filament heating assembly
By combining heat pipes and electric heating pipes, the problem of uneven heating in tungsten wire drawing equipment is solved, achieving uniform heating and preheating of tungsten wires, and improving graphite powder adhesion and wire drawing efficiency.
Patent Information
- Application Number
- CN202423291751.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The heating chamber space in existing tungsten wire drawing equipment is relatively large, which leads to uneven heating and affects the heating uniformity of the tungsten wire.
It adopts a combination structure of heat-conducting pipe and electric heating pipe. The heat-conducting pipe has a heating cavity in the center and the electric heating pipe is distributed around the heat-conducting pipe. The tungsten wire that enters through the wire inlet is heated evenly, and the temperature uniformity is improved by combining it with microporous ceramic membrane material.
This technology enables uniform and stable heating of a single tungsten wire, improves the adhesion of graphite powder and the preheating efficiency of the tungsten wire, and enhances the stability and efficiency of the wire drawing process.
Smart Images
Figure CN223642500U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tungsten wire drawing technology, and in particular to a tungsten wire surface heating component. Background Technology
[0002] Tungsten filament drawing equipment is used to draw coarse tungsten filaments into finer tungsten filaments through a drawing die. Before drawing, the surface of the tungsten filament needs to be impregnated with graphite emulsion. Afterward, the moisture in the graphite emulsion needs to be dried, allowing graphite powder to adhere to the surface of the tungsten filament. This graphite powder acts as a lubricant when passing through the drawing die. Current technology directly heats a large number of tungsten filaments through a heating chamber between two heating plates. This heating chamber is relatively large, and temperature differences exist between different areas, thus affecting the heating uniformity of the tungsten filaments. Utility Model Content
[0003] In order to solve the above-mentioned problems in the prior art, this utility model provides a tungsten wire heating component that can heat a single tungsten wire individually and provide more uniform and stable heating.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A tungsten filament heating assembly includes a heat-conducting tube and several electric heating tubes distributed parallel to the axis of the heat-conducting tube. The heat-conducting tube has a cylindrical heating cavity at its center and a wire inlet notch communicating with the heating cavity on its side. The electric heating tubes are disposed inside the heat-conducting tube and distributed around the heating cavity.
[0006] The tungsten wire enters the heat-conducting cavity through the wire inlet. After the heating tube is energized, it heats the heating cavity evenly. On the one hand, it heats the graphite emulsion attached to the surface of the tungsten wire, causing the water in the graphite emulsion to evaporate, and thus allowing the graphite powder to adhere to the surface of the tungsten wire. On the other hand, it preheats the tungsten wire, so that the tungsten wire has a higher temperature when it enters the drawing die later.
[0007] Preferably, the heat pipe has a C-shaped cross-section, and the heat pipe has a C-shaped cavity that extends through both ends. The heating element is disposed in the C-shaped cavity, and the heat pipe has end caps at both ends for sealing the C-shaped cavity. The end caps have clearance notches corresponding to the wire inlet notches.
[0008] Preferably, the inner side of the end cap is provided with a limiting protrusion that extends into the end of the C-shaped cavity, and the end cap is provided with through holes evenly distributed along the circumference. The end of the heating element passes through the through hole and is fastened by the first nut. The end cap not only seals both ends of the C-shaped cavity, but also serves to install and position the heating element; at the same time, it is very convenient to install and disassemble the whole unit.
[0009] Preferably, a C-shaped heat insulation sleeve is fitted over the outer side of the heat pipe, and a retaining ring is formed by extending inward from the outer peripheral edge of the end cap and fitting around the outer side of the heat insulation sleeve. The heat insulation sleeve can prevent heat loss from the outer wall of the heat pipe and improve heat utilization.
[0010] Preferably, the heat-conducting tube has connectors at both ends opposite to the wire inlet notch. Each connector has a connecting post, and the lower end of the connecting post has a thread. A second nut that connects to the thread is also provided at the lower end of the connecting post. The connecting post facilitates the installation of the heating assembly.
[0011] Preferably, the heat pipe is made of a microporous ceramic membrane material.
[0012] Therefore, this invention has the beneficial effects of being able to heat a single tungsten filament individually, and heating more uniformly and stably. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of one structure of the present utility model.
[0014] Figure 2 for Figure 1 Another perspective view.
[0015] Figure 3 for Figure 1 Sectional view at point AA.
[0016] Figure 4 for Figure 1 Exploded view.
[0017] Figure 5 This is a schematic diagram of one possible usage structure of the present utility model. Detailed Implementation
[0018] To make the technical problem to be solved, the technical solution, and the beneficial technical effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the scope of protection of the present utility model.
[0019] It should be understood that the terms "first," "second," etc., used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance, nor should they be construed as implicitly specifying the number of technical features indicated. Features specified as "first" or "second" may expressly or implicitly indicate that at least one of those features is included.
[0020] like Figures 1-4The tungsten wire heating assembly shown includes a heat-conducting pipe 1 and several electric heating tubes 2 distributed parallel to the axis of the heat-conducting pipe 1. The heat-conducting pipe 1 has a cylindrical heating cavity 100 at its center, and the side of the heat-conducting pipe 1 has a wire inlet notch 101 that communicates with the heating cavity 100. The electric heating tubes 2 are disposed inside the heat-conducting pipe 1 and distributed around the heating cavity 100.
[0021] The heat pipe 1 has a C-shaped cross-section and a C-shaped cavity 102 extending through both ends. The heating element 2 is disposed within the C-shaped cavity 102. Both ends of the heat pipe 1 are provided with end caps 3 for sealing the C-shaped cavity 102. The end caps 3 have clearance notches 30 corresponding to the wire inlet notch 101. The inner side of the end caps 3 has a limiting boss 31 extending into the end of the C-shaped cavity 102. The end caps 3 have through holes 32 evenly distributed circumferentially. The end of the heating element 2 passes through the through hole 32 and is secured by a first nut 33. A C-shaped heat insulation sleeve 4 is fitted over the outer side of the heat pipe 1. The outer periphery of the end caps 3 extends inward to form a limiting retaining ring 34 fitted over the outer side of the heat insulation sleeve 4.
[0022] In this embodiment, three heating tubes are provided. The heat conduction tube 1 is made of microporous ceramic membrane material. Microporous ceramic membrane is an existing material, also called ceramic membrane or inorganic ceramic membrane. It is usually divided into tubular ceramic membrane and flat plate ceramic membrane. It is usually used for water filtration. In this embodiment, a tubular ceramic membrane is used. By utilizing the heat resistance, insulation and microporous structure of the tubular ceramic membrane, the gas in the C-shaped cavity and the heating cavity can convect through the micropores and combine with heat conduction, so that the temperature in the heating cavity is more uniform and the heating efficiency is high.
[0023] The heat pipe 1 has connectors 5 on both ends opposite to the wire inlet notch 101. Connectors 5 are provided on connectors 5, and connectors 6 are provided on connectors 5. The lower end of connectors 6 is threaded and a second nut 7 is provided at the lower end of connectors 6 to be threaded.
[0024] Referring to the accompanying drawings, the principle of this utility model is as follows: Figure 1 As shown, a single tungsten wire 8 enters the heat-conducting cavity through the wire inlet. After the heating tube is energized, it uniformly heats the heating cavity. This process heats the graphite emulsion adhering to the surface of the tungsten wire, causing the moisture in the graphite emulsion to evaporate, thus allowing graphite powder to adhere to the surface of the tungsten wire. Simultaneously, it preheats the tungsten wire, ensuring it reaches a higher temperature when it subsequently enters the drawing die. For example... Figure 5 As shown, in order to improve the efficiency of tungsten wire drawing, multiple tungsten wires are usually drawn simultaneously, that is... Figure 1 The heating components shown are arranged in multiple groups and installed. Figure 5 The heating element is installed in a housing 9 with the wire inlet notches on all the heat pipes facing upwards. One heating element is inserted into one tungsten wire. Then the cover 90 is closed, thereby achieving simultaneous heating of multiple tungsten wires without affecting each other.
[0025] In the description of this utility model, it should be understood that the directions or positional relationships indicated by up, down, left, right, inner end, outer end, one end, and the other end are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the purpose of more clearly describing the technical solution of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as a limitation of this utility model.
[0026] Although specific embodiments of the present invention are described in detail herein, they are given for illustrative purposes only and should not be construed as limiting the scope of the present invention. Various substitutions, alterations, and modifications may be conceived without departing from the spirit and scope of the present invention.
Claims
1. A tungsten filament heating assembly, characterized in that, It includes a heat-conducting pipe (1) and several electric heating pipes (2) distributed parallel to the axis of the heat-conducting pipe (1). The heat-conducting pipe (1) has a cylindrical heating cavity (100) at its center and a wire inlet notch (101) communicating with the heating cavity (100) on its side. The electric heating pipes (2) are arranged inside the heat-conducting pipe (1) and distributed around the heating cavity (100).
2. The tungsten filament heating assembly according to claim 1, characterized in that, The heat-conducting pipe (1) has a C-shaped cross-section. The heat-conducting pipe (1) has a C-shaped cavity (102) that extends through both ends. The electric heating pipe (2) is placed inside the C-shaped cavity (102). The heat-conducting pipe (1) has end caps (3) at both ends for sealing the C-shaped cavity (102). The end caps (3) have clearance notches (30) at the corresponding positions of the wire inlet notch (101).
3. The tungsten filament heating assembly according to claim 2, characterized in that, The inner side of the end cap (3) is provided with a limiting boss (31) that extends into the end of the C-shaped cavity (102). The end cap (3) is provided with through holes (32) evenly distributed along the circumference. The end of the electric heating tube (2) passes through the through hole (32) and is fastened by the first nut (33).
4. The tungsten filament heating assembly according to claim 3, characterized in that, The heat pipe (1) is fitted with a heat insulation sleeve (4) with a C-shaped cross-section, and the outer peripheral edge of the end cap (3) extends inward to form a limiting ring (34) fitted on the outer side of the end of the heat insulation sleeve (4).
5. A tungsten filament heating assembly according to claim 1, characterized in that, The heat-conducting tube (1) has connectors (5) on both ends opposite to the wire inlet notch (101). The connectors (5) have connecting posts (6), the lower end of the connecting posts (6) has threads, and the lower end of the connecting posts (6) has a second nut (7) that is connected to the threads.
6. The tungsten filament heating assembly according to claim 1, characterized in that, The heat pipe (1) is made of microporous ceramic membrane material.