Graphite heater

Abstract

The utility model discloses a graphite heater which comprises installation supports located on the two sides of a furnace body, a graphite connecting rod is arranged on the installation supports, an electrode assembly and a graphite heating rod are arranged at the two ends of the graphite connecting rod respectively, and the installation supports are detachably connected with the furnace body. A heat insulation layer and a sealing layer are arranged between the installation support and the furnace wall of the furnace body, transition chambers are arranged on the two sides of the furnace body, the graphite heating rods are located in a heating cavity in the furnace body, the graphite heating rods on the two sides of the furnace body are connected with each other, the electrode assemblies are located in the transition chambers, non-stop overhauling of the furnace body is achieved, and the overhauling efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of carbon fiber production, and more specifically relates to a graphite heater. Background Art

[0002] After pre-oxidation, the carbon fiber precursor enters a high-temperature carbonization furnace for carbonization. The temperature in the carbonization furnace can reach as high as 1600°C, and a graphite heating device is generally used to heat the furnace cavity.

[0003] Common graphite heater structures include a graphite heating rod that passes directly through the furnace body and is connected to electrodes at both ends (existing patent with publication number CN220450381U), or a graphite heating plate that is made into a continuous "S" shape or "bow" shape and placed in the furnace cavity, with both ends also extending out of the furnace body to connect to electrodes (existing patent with publication number CN217083332U).

[0004] Although high-purity graphite heating rods need to be regularly inspected and maintained to ensure their long service life, it is usually necessary to stop the furnace body when the specified maintenance inspection is reached. After the furnace body cools down, open the furnace body, take out the graphite heating rod from its heating chamber, inspect it and then reinstall it. Due to the long working hours and the greater impact on the production efficiency of carbon fiber, the graphite heating rod that needs to be inspected is generally disassembled first, and then directly replaced with a new graphite heating rod. The furnace body is put into operation first, and then the disassembled graphite heating rod is inspected. If the inspection is correct, it is safely stored and waits for the next replacement.

[0005] However, both of the above methods require that the furnace body be shut down first and then wait for the furnace body to cool down. When the furnace body is running, it is also necessary to wait until the temperature inside the furnace reaches the processing temperature. Therefore, the overall maintenance time of the graphite heating rod is still relatively long, and there is much room for improvement. Utility Model Content

[0006] In view of the deficiencies of the prior art, the utility model provides a graphite heater, which can dismantle and replace the graphite heating rod that needs to be repaired without stopping the machine, thereby greatly improving the repair efficiency.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a graphite heater, comprising mounting brackets located on both sides of a furnace body, graphite connecting rods being provided on the mounting brackets, electrode assemblies and graphite heating rods being provided at both ends of the graphite connecting rods, the mounting brackets being detachably connected to the furnace body, an insulating layer and a sealing layer being provided between the mounting brackets and the furnace wall of the furnace body, transition chambers being provided on both sides of the furnace body, the graphite heating rods being located in a heating cavity inside the furnace body, and the graphite heating rods on both sides of the furnace body being connected to each other, and the electrode assembly being located in the transition chamber.

[0008] Furthermore, the transition chamber is a sealed chamber, and the transition chamber is connected to the atmosphere circulation system of the furnace body so that the atmosphere in the transition chamber is the same as the atmosphere in the furnace.

[0009] Furthermore, a support seat is provided in the heating chamber, and a positioning connection block is provided on the support seat. One end of the graphite heating rod is connected to the graphite connecting rod, and the other end is connected to the positioning connection block, and both ends of the positioning connection block are connected to the graphite heating rod.

[0010] Furthermore, the material of the positioning connection block is the same as that of the graphite heating rod.

[0011] Furthermore, the graphite heating rod is a hollow rod, and the positioning connection block and the graphite connecting rod are both provided with corresponding hollow connecting protrusions.

[0012] Furthermore, a positioning support plate is provided on the support seat.

[0013] Compared with the prior art, the beneficial effect of the present invention is that when repairing the graphite heating rod, the gas in the transition chamber is first circulated through the atmosphere circulation system on the furnace body until it is the same as the atmosphere in the furnace. Then the maintenance personnel wear protective clothing to enter the transition chamber, disconnect the power supply on the graphite heating rod to be repaired, and then the maintenance personnel disassemble the installation bracket. After disassembly, the internal graphite connecting rod and graphite heating rod are pulled out by moving the bracket, and then the graphite heating rod on the graphite connecting rod is removed and replaced with a new graphite heating rod. Finally, after reinstalling the installation bracket on the furnace body, the personnel exit the transition chamber and re-energize the graphite heating rod, thereby realizing non-stop maintenance of the furnace body and greatly improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the graphite heater of the present utility model.

[0015] Reference numerals: mounting bracket 1; graphite connecting rod 2; electrode assembly 3; graphite heating rod 4; transition chamber 5; heating chamber 6; outer wall 7; insulation layer 8; support seat 9; positioning connecting block 10; connecting protrusion 11; positioning support plate 12. DETAILED DESCRIPTION

[0016] In the description of the present utility model, it should be noted that for orientation terms, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and positional relationships are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 limiting the specific protection scope of the present utility model.

[0017] In addition, for terms such as "first" and "second", they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meanings of "several" and "a number of" are two or more, unless otherwise clearly and specifically defined.

[0018] Refer to Figure 1 for further description of the present utility model.

[0019] A graphite heater includes mounting brackets 1 located on both sides of a furnace body. Graphite connecting rods 2 are provided on the mounting brackets 1. Motor assemblies 3 and graphite heating rods 4 are respectively provided at both ends of the graphite connecting rods 2. The mounting brackets 1 are detachably connected to the furnace body. An insulating layer and a sealing layer are provided between the mounting brackets 1 and the furnace wall of the furnace body. Transition chambers 5 are provided on both sides of the furnace body. The graphite heating rods 4 are located in a heating chamber 6 inside the furnace body, and the graphite heating rods 4 on both sides of the furnace body are connected to each other. The motor assemblies 3 are located in the transition chambers 5.

[0020] As Figure 1 shown, preferably in this embodiment, the side wall of the furnace body includes an outer wall 7 and an internal heat-insulating layer 8.

[0021] As Figure 1 shown, preferably in this embodiment, the transition chamber 5 is a sealed chamber. The transition chamber 5 is connected to the atmosphere circulation system of the furnace body, so that the atmosphere in the transition chamber 5 is the same as the atmosphere in the furnace.

[0022] As Figure 1 shown, preferably in this embodiment, a support seat 9 is provided in the heating chamber 6. A positioning connection block 10 is provided on the support seat 9. One end of the graphite heating rod 4 is connected to the graphite connecting rod 2, and the other end is connected to the positioning connection block 10, and both ends of the positioning connection block 10 are connected to the graphite heating rods 4.

[0023] Specifically, the support seat 9 is made of high temperature resistant material.

[0024] In this embodiment, preferably, the material of the positioning connection block 10 is the same as that of the graphite heating rod 4 .

[0025] like Figure 1 As shown, in this embodiment, preferably, the graphite heating rod 4 is a hollow rod, and corresponding hollow connecting protrusions 11 are provided on the positioning connecting block 10 and the graphite connecting rod 2.

[0026] Specifically, the connecting protrusion 11 on the graphite connecting rod 2 is connected to the graphite heating plate through threads, and the connecting protrusion 11 on the positioning connecting block 10 is directly inserted into the hole of the graphite connecting rod 2.

[0027] like Figure 1 As shown, in this embodiment, preferably, a positioning support plate 12 is provided on the support seat 9, which is used to support the end of the graphite heating rod 4 through the positioning support plate 12 when installing the graphite heating rod 4, so as to ensure that the graphite heating rod 4 is accurately connected to the connecting protrusion 11 on the positioning connecting block 10.

[0028] like Figure 1 As shown, when repairing the graphite heating rod 4, the gas in the transition chamber 5 is first circulated through the atmosphere circulation system on the furnace body until it is the same as the atmosphere in the furnace. Then the maintenance personnel wear protective clothing to enter the transition chamber 5, disconnect the power supply on the graphite heating rod 4 to be repaired, and then the maintenance personnel disassemble the mounting bracket 1. After disassembly, the internal graphite connecting rod 2 and graphite heating rod 4 are pulled out by moving the bracket. Then, the graphite heating rod 4 on the graphite connecting rod 2 is removed and replaced with a new graphite heating rod 4. Finally, after reinstalling the mounting bracket 1 on the furnace body, the personnel exit the transition chamber 5 and re-energize the graphite heating rod 4, thereby realizing non-stop maintenance of the furnace body and greatly improving the maintenance efficiency.

[0029] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A graphite heater, characterized in that: It includes mounting brackets located on both sides of the furnace body. Graphite connecting rods are arranged on the mounting brackets. Electrode assemblies and graphite heating rods are respectively arranged at both ends of the graphite connecting rods. The mounting brackets are detachably connected to the furnace body. A heat insulation layer and a sealing layer are arranged between the mounting brackets and the furnace wall of the furnace body. Transition chambers are arranged on both sides of the furnace body. The graphite heating rods are located in the heating cavity inside the furnace body, and the graphite heating rods on both sides of the furnace body are connected to each other. The electrode assemblies are located in the transition chambers.

2. The graphite heater according to claim 1, characterized in that: The transition chamber is a sealed chamber, and the transition chamber is connected to the atmosphere circulation system of the furnace body, so that the atmosphere in the transition chamber is the same as the atmosphere in the furnace.

3. The graphite heater according to claim 1, characterized in that: Support seats are arranged in the heating cavity. Positioning connection blocks are arranged on the support seats. One end of the graphite heating rod is connected to the graphite connecting rod, and the other end is connected to the positioning connection block, and both ends of the positioning connection block are connected to the graphite heating rods.

4. The graphite heater according to claim 3, characterized in that: The material of the positioning connection block is the same as that of the graphite heating rod.

5. The graphite heater according to claim 3, wherein: The graphite heating rod is a hollow rod, and connecting bumps corresponding to the hollow are arranged on both the positioning connection block and the graphite connecting rod.

6. The graphite heater according to claim 3, wherein: Positioning support plates are arranged on the support seats.

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