An ultrahigh temperature tungsten wire heating test device

Abstract

This utility model belongs to the field of tungsten doping production, specifically relating to an ultra-high temperature tungsten wire heating test device. The device includes a lifting mechanism connected to a bell jar. Two opposing conductive copper busbars are vertically arranged inside the bell jar, each connected to a water-cooling clamp. A water-cooling groove is provided between the conductive copper busbars and the water-cooling clamp. The water-cooling clamp includes a conductive fixing plate with a hollow rotating track on it. A locking nut is located within the rotating track, and the conductive fixing plate is fixed to the water-cooling groove by the locking nut. The conductive fixing plate has an upper conductive clamp and a lower conductive clamp. A spiral lifting clamp is located on the upper conductive clamp, forming a clamping part between the spiral lifting clamp and the lower conductive clamp. The conductive copper busbars are connected to a power module, and the water-cooling groove is connected to a cooling water pipe. This heating test device can stably heat tungsten wire for extended periods and firmly position the tungsten wire, ensuring measurement accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of tungsten doping production, specifically relating to an ultra-high temperature tungsten wire heating test device. Background Technology

[0002] Doped tungsten refers to a class of alloys in which small amounts of other elements (usually metal oxides or rare earth oxides) are added to a tungsten matrix to improve its high-temperature performance, recrystallization temperature, creep resistance, and mechanical properties. Doped tungsten exhibits excellent high-temperature thermal stability and mechanical properties. Through doping and processing, it forms fine, elongated grains, improving thermal shock resistance and fatigue life. Currently, it is widely used in lighting, gas discharge light sources, and cathode materials for electron tubes. It is also used as a heating element in aluminum and chromium plating.

[0003] To accurately evaluate the high-temperature performance of tungsten-doped wires, they need to be heated to above 2500℃, and their deformation is measured as the criterion for their anti-sagging performance. During the test, the tungsten wire is first vertically fixed and heated to the target temperature. After holding at that temperature for a certain period, it is placed horizontally, and the height H1 is measured. After reheating, the height H2 is measured, and the difference between H1 and H2 is the amount of tungsten wire sagging. A test apparatus capable of continuous high-temperature heating and stable clamping is indispensable in this process. Utility Model Content

[0004] The purpose of this invention is to provide an ultra-high temperature tungsten wire heating test device. This heating test device can stably heat the tungsten wire for a long time and can firmly position the tungsten wire to ensure measurement accuracy.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an ultra-high temperature tungsten wire heating test device, comprising a frame, a sliding frame on the frame, a lifting device on the top of the sliding frame, the lifting device being connected to a bell jar, a sliding rod on the side of the bell jar, the sliding rod being connected to the sliding frame, and the sliding rod sliding on the sliding frame under the action of the lifting device.

[0006] Two opposing conductive copper busbars are vertically arranged inside the bell jar. Each conductive copper busbar is connected to a water-cooling clamp. A water-cooling groove is provided between the conductive copper busbar and the water-cooling clamp. The water-cooling clamp includes a conductive fixing plate. A hollow rotating track is provided on the conductive fixing plate. A locking nut is provided in the rotating track. The conductive fixing plate is fixed to the water-cooling groove by the locking nut.

[0007] The conductive fixing plate is provided with an upper conductive clamp and a lower conductive clamp. A spiral lifting clamp is provided on the upper conductive clamp. The upper conductive clamp and the spiral lifting clamp are threadedly connected, and a clamping part is formed between the spiral lifting clamp and the lower conductive clamp.

[0008] The conductive copper busbar is connected to the power module, the water cooling tank is connected to the cooling water pipe, an insulating pad is provided between the bell jar and the frame, a sealing pad is provided above the insulating pad, a hydrogen inlet is provided at the top of the bell jar, and a hydrogen exhaust hole penetrating the insulating pad is provided on the sealing pad.

[0009] Preferably, the lower part of the spiral lifting clamp and the upper part of the lower conductive clamp are both provided with clamping blocks.

[0010] Preferably, the bell jar is provided with an observation window.

[0011] Preferably, a rotating handle is provided between two opposing conductive fixing discs.

[0012] Preferably, the spiral lifting clamp includes a screw that passes through and is threadedly connected to the upper conductive clamp. A nut is provided above the screw, and a clamp is provided below the screw, which is located between the upper and lower conductive clamps.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The power module continuously supplies power to the conductive copper busbar, thereby continuously raising the temperature of the water-cooled clamp to 2500℃ or even higher, making the experiment possible.

[0015] 2. A water-cooling tank is installed between the conductive copper busbar and the conductive fixing plate. The water-cooling tank is connected to a cooling water pipe. Cooling water is continuously circulated through the cooling water pipe to cool down the high-temperature water-cooled chuck, improve the service life of the water-cooled chuck, and enable the equipment to continuously conduct high-temperature performance tests.

[0016] 3. The conductive fixing plate is equipped with a hollow rotating track. After the tungsten wire is fixed in the water-cooled clamp of the conductive fixing plate, the angle of the tungsten wire can be adjusted by adjusting the angle of the conductive fixing plate and locking it with the locking nut. This allows for observation and measurement of the sag of the tungsten wire, achieving the purpose of long-term, high-precision measurement of the high-temperature performance of the tungsten wire. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention;

[0018] Figure 2 for Figure 1 The side view of the conductive copper busbar connected to the water-cooling clamp in the embodiment shown;

[0019] Figure 3 for Figure 1 A 3D view of the connection between the intermediate conductive copper busbar and the water-cooling clamp;

[0020] Figure 4 for Figure 1A schematic diagram of the structure of the water-cooled chuck.

[0021] Figure Labels

[0022] 1. Frame; 2. Sliding frame; 3. Lifting device; 4. Bell jar; 5. Sliding rod; 6. Conductive copper busbar; 7. Water-cooled chuck; 71. Conductive fixing plate; 72. Rotary track; 73. Locking nut; 74. Upper conductive clamp; 75. Lower conductive clamp; 76. Spiral lifting clamp; 77. Clamping part; 78. Chuck pressure block; 79. Rotating handle; 8. Water cooling tank; 9. Power module; 10. Cooling water pipe; 11. Insulating pad; 12. Sealing gasket; 13. Hydrogen inlet; 14. Hydrogen exhaust port; 15. Observation window. Detailed Implementation

[0023] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] For ease of understanding, this embodiment introduces terms such as "up," "down," "left," "right," "front," and "back" to describe the direction or position of the components. Specifically, for example... Figure 1-4 As shown, this embodiment discloses an ultra-high temperature tungsten filament heating test device, including a frame 1, a sliding frame 2 mounted on the frame 1, a lifting device 3 mounted on the top of the sliding frame 2, the lifting device 3 being connected to a bell jar 4, and a sliding rod 5 mounted on the side of the bell jar 4, the sliding rod 5 being connected to the sliding frame 2. Driven by the lifting device 3, the sliding rod 5 slides on the sliding frame 2. The lifting device 3 is a miniature electric lift, connected to the bell jar 4, which can move the bell jar 4 up and down. The sliding rod 5 and the sliding frame 2 on the side of the bell jar 4 provide a vertical direction of movement.

[0025] Two opposing conductive copper busbars 6 are vertically arranged inside the bell jar 4. Each conductive copper busbar 6 is connected to a water-cooling clamp 7. A water-cooling groove 8 is provided between the conductive copper busbar 6 and the water-cooling clamp 7. The water-cooling clamp 7 includes a conductive fixing plate 71. A hollow rotating track 72 is provided on the conductive fixing plate 71. A locking nut 73 is provided in the rotating track 72. The conductive fixing plate 71 is fixed to the water-cooling groove 8 by the locking nut 73.

[0026] The conductive copper busbar 6 is connected to the power module 9, the water-cooling tank 8 is connected to the cooling water pipe 10, and an insulating pad 11 is provided between the bell jar 4 and the frame 1. A sealing pad 12 is provided above the insulating pad 11. The conductive fixing plate 71 is provided with an upper conductive clamping piece 74 and a lower conductive clamping piece 75. A spiral lifting clamping piece 76 is provided on the upper conductive clamping piece 74. The upper conductive clamping piece 74 and the spiral lifting clamping piece 76 are threadedly connected, and a clamping part 77 is formed between the spiral lifting clamping piece 76 and the lower conductive clamping piece 75.

[0027] like Figure 3 and Figure 4 As shown, the spiral lifting clamp 76 includes a screw, which is threadedly connected to the upper conductive clamp 74. A nut is provided above the screw, and the screw passes through the upper conductive clamp 74. A clamp is provided below the screw, and the clamp is located between the upper conductive clamp 74 and the lower conductive clamp 75. By turning the nut, the position of the connection between the screw and the upper conductive clamp 74 is adjusted, thereby affecting the position of the clamp. This enables the opening and closing of the clamping part 77 formed between the spiral lifting clamp 76 and the lower conductive clamp 75, which facilitates the clamping and fixing of the tungsten wire.

[0028] The conductive copper busbar 6, the conductive fixing plate 71, and the upper conductive clip 74 and lower conductive clip 75 on the conductive fixing plate 71 are all made of copper. Under the continuous power supply of the power module 9, the water-cooled chuck 7 continuously heats up, thereby causing the tungsten wire fixed on the water-cooled chuck 7 to continuously heat up. In order to improve the service life of the water-cooled chuck 7, the water-cooling tank 8 is made of copper or stainless steel. The cooling water continuously circulates and cools the water-cooled chuck 7. The rotating track 72 on the conductive fixing plate 71 is a smooth 90° arc groove from the horizontal to the vertical direction. It can drive the entire water-cooled chuck 7 to rotate 90°, which facilitates the switching of the tungsten wire fixed in the clamping part 77 between the horizontal and vertical directions for measuring the sag.

[0029] The upper part of the bell jar 4 is provided with a hydrogen inlet 13, and a hydrogen vent hole 14 penetrating the insulating pad 11 is opened on the sealing gasket 12. In this application, the insulating pad 11 is made of bakelite board, and the sealing gasket 12 is made of silicone gasket, which can play the role of insulation and sealing. When the bell jar 4 is fixedly placed, hydrogen can be introduced through the hydrogen inlet 13 for hydrogen protection, while the hydrogen vent hole 14 can exhaust excess gas.

[0030] To ensure stable clamping of the tungsten wire, clamping blocks 78 are provided at the lower part of the spiral lifting clamp 76 and the upper part of the lower conductive clamp 75; an observation window 15 is provided on the bell jar 4 to observe the test progress at any time; a rotating handle 79 is provided between the two opposing conductive fixing disks 71. The rotating handle 79 is made of insulating bakelite or high-temperature resistant plastic. Holding the rotating handle 79 can realize the synchronous rotation of the two conductive fixing disks 71, which is simple and convenient to operate.

[0031] The method of using this utility model is as follows:

[0032] Experimental preparation: First, cut the tungsten wire to a length of 230-250mm. Then, fold the tungsten wire in half along the middle and bend it into a V-shaped structure to form the apex of the included angle and the free ends on both sides. After cleaning the graphite and other impurities on the surface of the tungsten wire, the experiment can begin.

[0033] Fixing the tungsten wire: After connecting the power supply of the lifting device 3, use the lifting device 3 to raise the bell jar 4 to a certain position, fix the two free ends of the tungsten wire to the clamping block 78 of the clamping part 77 of the water-cooled clamp 7, and suspend a weight at the vertex of the included angle of the tungsten wire. Then, under the action of gravity, the two free ends of the V-shaped tungsten wire bend into straight sides of the included angle.

[0034] To obtain the fusing current A1: Place the bell jar 4 on the sealing gasket 12, turn on the hydrogen switch, and let the hydrogen enter the bell jar 4 from the hydrogen inlet 13 until the hydrogen fills the entire bell jar 4. Turn on the power module 9 to supply power to the two oppositely arranged conductive copper busbars 6, and control the current to increase at a rate of 1A / s until the tungsten wire is melted. Record the fusing current as A1.

[0035] Tungsten wire shaping measurement: Replace the tungsten wire and repeat step (2) to fix the tungsten wire. Control the power module 9 to increase the current at a rate of 1A / s until the current reaches 65%A1. After keeping it warm for 1 minute, turn off the power module 9. The fixed V-shaped tungsten wire will be shaped under high temperature conditions.

[0036] Measure the reference height H1: Loosen the locking nut 73, rotate the rotating handle 79 to rotate the conductive fixing plate 71 90°, and then tighten the locking nut 73 to fix it. Then rotate the clamping part 77 of the water-cooling chuck 7 90° so that the plane formed by the V-shaped tungsten wire is parallel to the horizontal plane. Use a height gauge to measure the height H1 of the distance from the vertex of the tungsten wire angle to the insulating pad 11.

[0037] Measure the high temperature height H2: Control the power module 9 to make the current flow at a rate of 1A / S until the current reaches 80% of the current value of A1, and keep it at that temperature for 5 minutes; turn on the power supply of the lifting device 3 so that the lifting device 3 raises the bell jar 4 to a certain position, and use a height meter to measure the height H2 of the distance from the vertex of the V-shaped tungsten wire to the insulating pad 11.

[0038] Calculate the sag ∆H: Subtract H1 from H2 to obtain the sag ∆H. The magnitude of ∆H is used to evaluate the anti-sag performance of the tungsten wire under high temperature conditions.

[0039] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An ultra-high temperature tungsten wire heating test device, comprising a frame, characterized in that: A sliding frame is mounted on the machine frame, and a lifting device is installed on the top of the sliding frame. The lifting device is connected to a bell jar. A sliding rod is installed on the side of the bell jar, and the sliding rod is connected to the sliding frame. Under the action of the lifting device, the sliding rod slides on the sliding frame. Two opposing conductive copper busbars are vertically arranged inside the bell jar. Each conductive copper busbar is connected to a water-cooling clamp. A water-cooling groove is provided between the conductive copper busbar and the water-cooling clamp. The water-cooling clamp includes a conductive fixing plate. A hollow rotating track is provided on the conductive fixing plate. A locking nut is provided in the rotating track. The conductive fixing plate is fixed to the water-cooling groove by the locking nut. An upper conductive clamp and a lower conductive clamp are fixedly arranged on the conductive fixing plate. A spiral lifting clamp is arranged above the upper conductive clamp. The upper conductive clamp and the spiral lifting clamp are threadedly connected, and a clamping part is formed between the spiral lifting clamp and the lower conductive clamp. The conductive copper busbar is connected to the power module, the water-cooling tank is connected to the cooling water pipe, an insulating pad is provided between the bell jar and the frame, and a sealing gasket is provided above the insulating pad. The upper part of the bell jar is provided with a hydrogen inlet, and a hydrogen vent hole that penetrates the insulating gasket is provided on the sealing gasket.

2. The ultra-high temperature tungsten wire heating test device according to claim 1, characterized in that: Both the lower part of the spiral lifting clamp and the upper part of the lower conductive clamp are provided with clamping blocks.

3. The ultra-high temperature tungsten wire heating test device according to claim 1, characterized in that: The bell jar is equipped with an observation window.

4. The ultra-high temperature tungsten wire heating test device according to claim 1, characterized in that: A rotating handle is provided between two opposing conductive fixing discs.

5. The ultra-high temperature tungsten wire heating test device according to claim 1, characterized in that: The rotating track is a smooth 90° circular arc groove extending from the horizontal to the vertical direction.

6. The ultra-high temperature tungsten wire heating test device according to claim 2, characterized in that: The spiral lifting clamp includes a screw that passes through and is threadedly connected to the upper conductive clamp. A nut is provided above the screw, and a clamp is provided below the screw, which is located between the upper and lower conductive clamps.

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