Telescopic graphite heater for high-temperature vacuum furnace

Abstract

The utility model discloses a telescopic graphite heater for a high-temperature vacuum furnace, and belongs to the technical field of vacuum furnace heating. Comprising a graphite electrode and a vertical connecting plate, graphite electrodes are fixedly connected to the electrodes on the two sides of the furnace body respectively. Vertical connecting plates are hinged to the graphite electrodes, and an adjusting heating structure is hinged between the two vertical connecting plates; the adjusting heating structure comprises a short heating plate and a long heating plate; short heating plates are hinged to the two ends of the long heating plate respectively, and the other ends of the short heating plates are hinged to the vertical connecting plate; according to the utility model, the stress caused by length size change of the graphite heater is eliminated, and the stability of the whole heater is ensured; the device is simple in structure and convenient to install, and the error rate in the installation process is obviously reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum furnace heating, in particular to a retractable graphite heater for a high-temperature vacuum furnace. Background Art

[0002] With the development of science and technology, the use of high-temperature vacuum furnaces is becoming more and more widespread. As an indispensable component of high-temperature vacuum furnaces such as high-temperature purification furnaces and graphitization furnaces, the heating system plays a decisive role in the stability of equipment operation. However, during the heating process and at high temperature, the graphite heater expands due to the increase in temperature, and there is a large difference in the structural dimensions at room temperature, resulting in greater stress in the heater, a high heater failure rate, and poor stability. Specifically, the heating plate itself will warp, break, spark, and even destroy the entire heater structure, seriously affecting the stability of the equipment and significantly increasing the replacement cost of the graphite heater. At the same time, the existing graphite heater uses carbon-carbon fasteners to connect graphite parts. Due to the difference in thermal expansion coefficients between graphite parts and carbon-carbon parts, it is necessary to reserve a suitable gap during room temperature installation. The installation technology requirements are high and the error rate is high. Utility Model Content

[0003] The utility model overcomes the shortcomings of the prior art and provides a retractable graphite heater for a high-temperature vacuum furnace, thereby solving the problems of deformation and installation difficulty of the prior vacuum furnace heating device.

[0004] In order to achieve the above purpose, the utility model is implemented through the following technical solutions.

[0005] A retractable graphite heater for a high-temperature vacuum furnace comprises a graphite electrode and a vertical connecting plate; the graphite electrodes are fixedly connected to the electrodes on both sides of the furnace body respectively; the vertical connecting plate is hinged on the graphite electrode, and an adjustable heating structure is hinged between the two vertical connecting plates; the adjustable heating structure comprises a short heating plate and a long heating plate; a short heating plate is hinged at each end of the long heating plate, and the other end of the short heating plate is hinged on the vertical connecting plate.

[0006] Furthermore, the graphite electrodes on both sides of the furnace are kept in a vertical state.

[0007] Furthermore, a plurality of adjustable heating structures are hingedly connected between the two vertical connecting plates at intervals.

[0008] Furthermore, the plurality of adjustment heating structures are parallel, and the long heating plates of the adjustment heating structures are in a horizontal state.

[0009] Furthermore, the vertical connecting plate is hinged on the graphite electrode through the electrode pin screw, and is screwed and fastened through the connecting plate fastening nut.

[0010] Furthermore, both ends of the long heating plate are hinged to the short heating plate through heating plate pin screws and heating plate fastening nuts.

[0011] Furthermore, the other end of the short heating plate is hinged to the vertical connecting plate through the heating plate pin screw and the heating plate fastening nut.

[0012] The beneficial effects of the utility model compared with the prior art are:

[0013] The heater structure of the utility model is designed with hinges on each group, which utilizes the principle of quadrilateral instability and increases the degree of freedom of the graphite heater. As the temperature rises, the graphite heating plate continues to expand, the hinge rotates, the structure of the quadrilateral changes, and "absorbs" the length of the thermal expansion extension, eliminating the stress caused by the change in the length of the graphite heater, and ensuring the stability of the entire heater. At the same time, in the heater of this structure, all fasteners and hinge shafts are made of graphite parts, and carbon-carbon parts are not used, which reduces the overall cost.

[0014] The utility model effectively ensures the stability of the equipment during use, increases the utilization rate of the equipment, and improves the production capacity of the equipment. At the same time, the structure can be applied to other types of equipment, and its use is extensive.

[0015] The device has a simple structure and is easy to install, which not only reduces the technical level requirements for installers, but also significantly reduces the error rate of the installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the graphite heater described in the utility model.

[0017] Figure 2 for Figure 1 Middle AA section;

[0018] Figure 3 for Figure 1 Middle BB view;

[0019] Figure 4 for Figure 2 Enlarged view of the center;

[0020] Figure 5 for Figure 1 Top view of the .

[0021] In the figure:

[0022] 1. Graphite electrode 2. Short heating plate 3. Long heating plate 4. Vertical connecting plate

[0023] 5. Electrode pin screw 6. Connecting plate fastening nut 7. Heating plate fastening nut 8. Heating plate pin screw. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail in combination with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solution of the present invention is described in detail below in combination with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0025] like Figure 1-5 As shown, this embodiment provides a retractable graphite heater for a high-temperature vacuum furnace, a graphite electrode 1 and a vertical connecting plate 4; a graphite electrode 1 is fixedly connected to each of the copper electrodes on both sides of the furnace body; the graphite electrodes 1 on both sides of the furnace are kept in a vertical state. The vertical connecting plate 4 is hinged to the graphite electrode 1 through the electrode pin screw 5, and is screwed and fastened through the connecting plate fastening nut 6. Four adjustment heating structures are hinged between the two vertical connecting plates 4; the adjustment heating structure includes a short heating plate 2 and a long heating plate 3; the long heating plate 3 is hinged to the short heating plate 2 at both ends through the heating plate pin screw 8 and the heating plate fastening nut 7. The other end of the short heating plate 2 is hinged to the vertical connecting plate 4 through the heating plate pin screw 8 and the heating plate fastening nut 7. The long heating plate 3 of the adjustment heating structure is in a horizontal state.

[0026] All fasteners and hinge shafts are made of graphite.

[0027] The installation method of the graphite heater is:

[0028] First, install and fix the two graphite electrodes 1 on the copper electrodes on both sides of the furnace body, and keep the graphite electrodes 1 in a vertical fixed state. The vertical connecting plate 4 is hinged on the graphite electrode 1 through the electrode pin screw 5, and is screwed and tightened through the connecting plate fastening nut 6. A short heating plate 2 is hinged at each end of the long heating plate 3 through the heating plate pin screw 8 and the heating plate fastening nut 7. After the hinge is completed, the other end of the short heating plate 2 is hinged to the vertical connecting plate 4 through the heating plate pin screw 8 and the heating plate fastening nut 7. Repeat the operation until the installation is completed.

[0029] During the heating process, the graphite heater continues to expand, all the hinges begin to rotate, the angles between the vertical connecting plate 4 and the graphite electrode 1, the vertical connecting plate 4 and the short heating plate 2, and the short heating plate 2 and the long heating plate 3 begin to change, and the quadrilateral structure formed by the hinge points changes, "absorbing" the length of the thermal expansion extension, eliminating the stress of the graphite heater caused by the change in length dimension, and ensuring the stability of the entire heater.

[0030] The above content is a further detailed description of the utility model in combination with a specific preferred implementation method. It cannot be determined that the specific implementation methods of the utility model are limited to this. For ordinary technicians in the technical field to which the utility model belongs, they can make several simple deductions or substitutions without departing from the utility model, which should be regarded as belonging to the utility model and the scope of patent protection determined by the submitted claims.

Claims

1. A retractable graphite heater for a high temperature vacuum furnace, characterized in that: The invention comprises a graphite electrode (1) and a vertical connecting plate (4); the graphite electrodes (1) are fixedly connected to the electrodes on both sides of the furnace body; the graphite electrode (1) is hinged with a vertical connecting plate (4), and an adjustable heating structure is hinged between the two vertical connecting plates (4); the adjustable heating structure comprises a short heating plate (2) and a long heating plate (3); the two ends of the long heating plate (3) are respectively hinged with a short heating plate (2), and the other end of the short heating plate (2) is hinged to the vertical connecting plate (4).

2. The retractable graphite heater for a high temperature vacuum furnace according to claim 1, characterized in that: The graphite electrodes (1) on both sides of the furnace are kept in a vertical position.

3. The retractable graphite heater for a high temperature vacuum furnace according to claim 1, characterized in that: A plurality of adjustable heating structures are hingedly connected at intervals between the two vertical connecting plates (4).

4. The retractable graphite heater for a high temperature vacuum furnace according to claim 3, characterized in that: The plurality of adjustable heating structures are parallel to each other, and the long heating plates (3) of the adjustable heating structures are located in a horizontal state.

5. The retractable graphite heater for a high temperature vacuum furnace according to claim 1, characterized in that: The vertical connecting plate (4) is hinged to the graphite electrode (1) through the electrode pin screw (5), and is screwed and fastened through the connecting plate fastening nut (6).

6. The retractable graphite heater for a high temperature vacuum furnace according to claim 1, characterized in that: The two ends of the long heating plate (3) are hingedly connected to the short heating plate (2) via heating plate pin screws (8) and heating plate fastening nuts (7).

7. The retractable graphite heater for a high temperature vacuum furnace according to claim 6, characterized in that: The other end of the short heating plate (2) is hinged to the vertical connecting plate (4) through the heating plate pin screw (8) and the heating plate fastening nut (7).

Images