Graphitization furnace capable of adjusting air pressure in furnace

Abstract

The utility model relates to a graphitization furnace, in particular to a graphitization furnace capable of adjusting air pressure in the furnace, which comprises a furnace body, a sealing cylinder fixedly mounted on the upper surface of the furnace body, a sealing plate fixedly mounted on the upper surface of the sealing cylinder, an air hole formed in the middle of the sealing plate, a fixing frame fixedly mounted on the upper surface of the sealing plate, and a pressure relief pipe fixedly mounted in the middle of the upper surface of the sealing plate; a plug is arranged at the upper end of the pressure relief pipe, a bottom plate is fixedly installed at the other end of the plug, guide shafts are fixedly installed at the two ends of the bottom plate, the guide shafts are sleeved with springs and push plates, bolts are arranged in the middle of the fixing frame, the screw tails of the bolts are attached to the push plates, and the distance between the push plates and the fixing frame is controlled by rotating the bolts. Therefore, the tension force of the spring between the push plate and the bottom plate is adjustable, the pressing force of the chock plug on the pressure relief pipe is controlled, the limit air pressure threshold value in the furnace body is adjusted, the air pressure in the furnace body is kept within the stable threshold value, the temperature difference of different areas in the furnace body is reduced, and the production quality and the product performance are improved.

Description

Technical Field

[0001] The utility model relates to a graphitization furnace, in particular to a graphitization furnace capable of adjusting the gas pressure in the furnace. Background Art

[0002] Graphitization furnace is a high-temperature resistance furnace used for high-temperature treatment of carbon materials. It is mainly used in the production of artificial graphite products. Graphitization furnace originated in developed countries in Europe and the United States in the 1960s. At that time, DC graphitization technology began to develop in Europe and the United States. Subsequently, China also began to use DC graphitization technology to produce artificial graphite. With the continuous development of technology, the application scope of graphitization furnaces has been continuously expanded, involving fields such as battery materials, carbon materials, powder metallurgy, cemented carbide, precision ceramics, high thermal conductivity films, contact materials, carbon fiber, etc. The furnace body of the graphitization furnace is made of refractory materials and has heat resistance and insulation properties. The heating methods of the graphitization furnace are mainly internal string type and Acheson type. Among them, the internal string graphitization furnace is directly heated by the electrode itself and does not require fillers, so it can reduce heat removal and reduce power consumption. The advantages of the graphitization furnace include high efficiency, energy saving, precise temperature control, high output, etc. It is one of the indispensable important equipment in modern industrial production;

[0003] Under certain temperature and pressure conditions, the gas composition and pressure in the furnace can affect the speed and degree of graphitization reaction; excessive gas pressure in the furnace will cause the temperature difference in the graphitization furnace to increase, especially in different areas of the furnace, thus making the quality of the graphitized product uneven and affecting the performance of the product. Utility Model Content

[0004] The main purpose of the utility model is to provide a graphitization furnace with adjustable gas pressure in the furnace, so as to solve the problem proposed in the related art that excessive gas pressure in the furnace will lead to increased temperature difference in the graphitization furnace, especially in different areas of the furnace, thereby making the quality of the graphitized product uneven and affecting the performance of the product.

[0005] In order to achieve the above-mentioned object, according to one aspect of the utility model, a graphitization furnace with adjustable gas pressure in the furnace is provided, comprising a furnace body, a furnace cavity is provided in the furnace body, a through hole is provided in the middle of the upper surface of the furnace body, a sealing cylinder is fixedly installed on the upper surface of the furnace body, the through hole is located in the middle of the sealing cylinder, a sealing plate is fixedly installed on the upper surface of the sealing cylinder, an air hole is provided in the middle of the sealing plate, a fixing frame is fixedly installed on the upper surface of the sealing plate, and a pressure relief pipe is fixedly installed on the middle of the upper surface of the sealing plate;

[0006] Among them, a plug is provided at the upper end of the pressure relief pipe, a base plate is fixedly installed at the other end of the plug, guide shafts are fixedly installed at both ends of the base plate, the guide shaft sleeve is provided with a spring, the guide shaft sleeve is provided with a push plate, the lower surface of the push plate is in contact with the spring, a bolt is provided in the middle of the fixed frame, the bolt tail is in contact with the push plate, and the bolt is rotated to adjust the tension of the spring, which is used to adjust the clamping force between the plug and the upper end opening of the pressure relief pipe.

[0007] Furthermore, a limiting groove is provided in the middle of the sealing plate, and a pressure relief plate is hinged in the limiting groove.

[0008] Furthermore, the pressure relief pipe is in a truncated cone shape, a pressure relief groove is provided at the opening of the upper end of the pressure relief pipe, and the plug is adapted to the pressure relief groove.

[0009] Furthermore, guide holes are provided at both ends of the upper surface of the fixing frame, and the other end of the guide shaft is slidably installed in the guide hole.

[0010] Furthermore, the furnace body side wall is hinged with a hydraulic rod, the furnace body side wall is provided with a hinged portion, the hinged portion is arranged between the hydraulic rod and the furnace cavity opening, the furnace cavity opening is provided with a furnace cover, and the furnace cover is hinged to the hinged portion.

[0011] Furthermore, a first connecting rod is hinged in the middle of the outer side wall of the furnace cover, a second connecting rod is hinged in the hinged portion, the other end of the first connecting rod is hinged to the other end of the second connecting rod, a connecting rod is hinged at the hinge between the first connecting rod and the second connecting rod, and the other end of the connecting rod is fixedly connected to the piston end of the hydraulic rod.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] In the graphitization furnace with adjustable furnace pressure, the distance between the push plate and the fixed frame is controlled by rotating the bolt, so that the tension of the spring between the push plate and the bottom plate can be adjusted, and then the pressing force of the plug on the pressure relief pipe is controlled, so as to adjust the ultimate gas pressure threshold in the furnace body, keep the gas pressure in the furnace body within the stable threshold, reduce the temperature difference in different areas of the furnace body, and improve the production quality and product performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of a graphitization furnace with adjustable gas pressure in the furnace;

[0015] Figure 2 A schematic diagram of the structure of a graphitization furnace with adjustable gas pressure inside the furnace;

[0016] Figure 3 It is a schematic diagram of a partial half-section structure of a graphitization furnace with adjustable gas pressure in the furnace;

[0017] Figure 4 It is a schematic structural diagram of a half-section view of the fixed frame.

[0018] Illustrations: 1. furnace body; 101. sealing cylinder; 102. sealing plate; 1021. pressure relief plate; 103. fixing frame; 1031. bolt; 104. pressure relief pipe; 105. plug; 106. bottom plate; 1061. guide shaft; 1062. spring; 107. push plate; 108. hinged part; 2. hydraulic rod; 201. furnace cover; 202. first connecting rod; 203. second connecting rod; 204. connecting rod. DETAILED DESCRIPTION

[0019] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0020] See also Figure 1-Figure 4 As shown, the purpose of this embodiment is to provide a graphitization furnace with adjustable gas pressure in the furnace, including a furnace body 1, a furnace cavity is opened in the furnace body 1, a through hole is opened in the middle of the upper surface of the furnace body 1, a sealing cylinder 101 is fixedly installed on the upper surface of the furnace body 1, the through hole is located in the middle of the sealing cylinder 101, a sealing plate 102 is fixedly installed on the upper surface of the sealing cylinder 101, an air hole is opened in the middle of the sealing plate 102, a fixing frame 103 is fixedly installed on the upper surface of the sealing plate 102, and a pressure relief pipe 104 is fixedly installed in the middle of the upper surface of the sealing plate 102;

[0021] Among them, a plug 105 is provided at the upper end of the pressure relief pipe 104, and a base plate 106 is fixedly installed at the other end of the plug 105. Guide shafts 1061 are fixedly installed at both ends of the base plate 106. The guide shaft 1061 is sleeved with a spring 1062, and the guide shaft 1061 is sleeved with a push plate 107. The lower surface of the push plate 107 is in contact with the spring 1062. A bolt 1031 is provided in the middle of the fixed frame 103, and the tail of the bolt 1031 is in contact with the push plate 107. The bolt 1031 is rotated to adjust the tension of the spring 1062, which is used to adjust the clamping force between the plug 105 and the upper opening of the pressure relief pipe 104.

[0022] A limiting groove is provided in the middle of the sealing plate 102, and a pressure relief plate 1021 is hinged in the limiting groove. A rubber gasket is fixedly installed on the lower surface of the pressure relief plate 1021 to improve the overall sealing performance of the furnace body 1. At the same time, the pressure relief plate 1021 can only achieve one-way flow. When the air pressure in the furnace body 1 is too high, the high-temperature gas enters the sealing cylinder 101 through the through hole for storage. Then, when the air pressure in the sealing cylinder 101 increases, the high-temperature and high-pressure gas will lift the pressure relief plate 1021, allowing the gas to enter the pressure relief pipe 104. When the air pressure in the sealing cylinder 101 is stable, the pressure relief plate 1021 will block the air hole.

[0023] The pressure relief pipe 104 is in a truncated cone shape, and a pressure relief groove is provided at the opening of the upper end of the pressure relief pipe 104. The plug 105 is matched with the pressure relief groove. Through the truncated cone structure of the pressure relief pipe 104, the gas flows along the direction of flow, and the flow area gradually decreases, so that the gas is accelerated and lifts the plug 105, so that the bottom plate 106 rises and compresses the spring 1062. At this time, the spring 1062 deforms and stores energy, so that when the gas pressure decreases, the spring 1062 drives the plug 105 to quickly reset, thereby preventing oxygen from entering the furnace body 1 and reducing the heat loss in the furnace body 1.

[0024] Guide holes are provided at both ends of the upper surface of the fixing frame 103, and the other end of the guide shaft 1061 is slidably installed in the guide holes. In order to prevent the plug 105 from being misaligned with the pressure relief pipe 104, resulting in heat loss in the furnace body 1 and the entry of oxygen, which affects the reaction speed and degree of graphitization, the guide holes are used to limit the guide shaft 1061, so that the plug 105 can move linearly up and down, thereby ensuring the production quality and production efficiency of the graphitization furnace.

[0025] A hydraulic rod 2 is hinged on the side wall of the furnace body 1, and a hinged portion 108 is provided on the side wall of the furnace body 1. The hinged portion 108 is provided between the hydraulic rod 2 and the opening of the furnace cavity. A furnace cover 201 is provided at the opening of the furnace cavity, and the furnace cover 201 is hinged to the hinged portion 108. A sealing strip is fixedly installed at the edge of the furnace cover 201 to ensure the airtightness inside the furnace body 1, avoid the loss of pressure and temperature inside the furnace body 1, and prevent oxygen from entering the furnace body 1.

[0026] A first connecting rod 202 is hinged to the middle part of the outer side wall of the furnace cover 201, and a second connecting rod 203 is hinged to the hinge part 108. The other end of the first connecting rod 202 is hinged to the other end of the second connecting rod 203, and a connecting rod 204 is hinged at the hinge between the first connecting rod 202 and the second connecting rod 203. The other end of the connecting rod 204 is fixedly connected to the piston end of the hydraulic rod 2. In order to prevent the high temperature and high pressure in the furnace body 1 from reducing the airtightness of the furnace cover 201 and the furnace body 1, the piston end of the hydraulic rod 2 is extended so that the second connecting rod 203 rotates around the hinge part 108, thereby pushing the first connecting rod 202, so that the first connecting rod 202 pushes the furnace cover 201, further increasing the clamping force between the furnace cover 201 and the furnace body 1, and further improving the overall airtightness of the graphitization furnace, which is used to improve the quality of products produced by the graphitization furnace.

[0027] When the utility model is used, the piston end of the control hydraulic rod 2 is retracted, and at this time the connecting rod 204 will drive the second connecting rod 203 to rotate, and then pull the first connecting rod 202, so that the first connecting rod 202 drives the furnace cover 201 to open, and then the graphitized raw materials are placed in the furnace cavity inside the furnace body 1, and then the piston end of the hydraulic rod 2 is extended, and at this time the first connecting rod 202 will push the furnace cover 201 to fit tightly with the furnace body 1. When the temperature in the furnace body 1 increases, the air pressure in the furnace body 1 also increases, and the bolt 1031 is rotated, and the push plate 107 is pushed by the bolt 1031 to control the push plate 10 7 and the bottom plate 106. When the gas pressure inside the furnace body 1 exceeds the threshold, the high-temperature and high-pressure gas will enter the sealing cylinder 101 through the through hole and lift the pressure relief plate 1021. At this time, the high-temperature and high-pressure gas enters the pressure relief pipe 104. Then, when the gas pressure in the pressure relief pipe 104 is higher than the tensioning force of the spring 1062, the spring 1062 will deform and separate the plug 105 from the pressure relief pipe 104, so that the furnace body 1 is depressurized and the gas pressure in the furnace body 1 is reduced. Then, the spring 1062 will reset and re-seal the pipe opening of the pressure relief pipe 104.

[0028] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A graphitization furnace with adjustable gas pressure in the furnace, comprising a furnace body (1), wherein a furnace cavity is provided in the furnace body (1), and wherein: A through hole is provided in the middle of the upper surface of the furnace body (1); a sealing cylinder (101) is fixedly mounted on the upper surface of the furnace body (1); the through hole is located in the middle of the sealing cylinder (101); a sealing plate (102) is fixedly mounted on the upper surface of the sealing cylinder (101); an air hole is provided in the middle of the sealing plate (102); a fixing frame (103) is fixedly mounted on the upper surface of the sealing plate (102); and a pressure relief pipe (104) is fixedly mounted in the middle of the upper surface of the sealing plate (102); The upper end of the pressure relief pipe (104) is provided with a plug (105), the other end of the plug (105) is fixedly mounted with a base plate (106), both ends of the base plate (106) are fixedly mounted with guide shafts (1061), the guide shaft (1061) is sleeved with a spring (1062), the guide shaft (1061) is sleeved with a push plate (107), the lower surface of the push plate (107) is in contact with the spring (1062), a bolt (1031) is provided in the middle of the fixing frame (103), the tail of the bolt (1031) is in contact with the push plate (107), and the bolt (1031) is rotated to adjust the tension of the spring (1062), so as to adjust the pressing force between the plug (105) and the upper opening of the pressure relief pipe (104).

2. The graphitization furnace with adjustable furnace pressure according to claim 1, characterized in that: A limiting groove is provided in the middle of the sealing plate (102), and a pressure relief plate (1021) is hinged in the limiting groove.

3. The graphitization furnace with adjustable furnace pressure according to claim 2, characterized in that: The pressure relief pipe (104) is in a truncated cone shape, a pressure relief groove is provided at the upper opening of the pressure relief pipe (104), and the plug (105) is adapted to fit the pressure relief groove.

4. The graphitization furnace with adjustable furnace pressure according to claim 3, characterized in that: Guide holes are provided at both ends of the upper surface of the fixing frame (103), and the other end of the guide shaft (1061) is slidably mounted in the guide hole.

5. The graphitization furnace with adjustable gas pressure in the furnace according to claim 4, characterized in that: The furnace body (1) side wall is hinged with a hydraulic rod (2), the furnace body (1) side wall is provided with a hinged portion (108), the hinged portion (108) is arranged between the hydraulic rod (2) and the furnace cavity opening, the furnace cavity opening is provided with a furnace cover (201), and the furnace cover (201) is hinged with the hinged portion (108).

6. The graphitization furnace with adjustable furnace pressure according to claim 5, characterized in that: A first connecting rod (202) is hingedly connected to the middle portion of the outer side wall of the furnace cover (201), and a second connecting rod (203) is hingedly connected to the hinge portion (108).

7. The graphitization furnace with adjustable gas pressure in the furnace according to claim 6, characterized in that: The other end of the first connecting rod (202) is hinged to the other end of the second connecting rod (203); a connecting rod (204) is hinged at the hinge between the first connecting rod (202) and the second connecting rod (203); the other end of the connecting rod (204) is fixedly connected to the piston end of the hydraulic rod (2).

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