Graphite heater for high-temperature vacuum furnace

Abstract

The utility model discloses a graphite heater for a high-temperature vacuum furnace, which belongs to the technical field of graphite heaters and comprises a bottom mounting ring, a graphite column and a top mounting ring, the bottom mounting ring comprises a first mounting ring and a second mounting ring, and the first mounting ring and the second mounting ring are connected through a fixing component. The fixing assembly comprises a first fixing block fixedly connected to the first mounting ring and a second fixing block fixedly connected to the second mounting ring, an inserting groove is formed in the first fixing block, and two sets of fixing columns are fixedly connected to the top of the first fixing block; according to the graphite heater for the high-temperature vacuum furnace, after the first mounting ring and the second mounting ring are connected, the spring washers are arranged on the fixing columns, certain deformation between accessories can be allowed, after the graphite columns are inserted into the first insertion holes, the top mounting ring is inserted into the tops of the graphite columns, and fixing is achieved through the sleeves; and damage to parts caused by expansion caused by heat and contraction caused by cold is reduced while quick installation is achieved.

Description

Technical Field

[0001] This utility model specifically relates to a graphite heater for a high-temperature vacuum furnace, belonging to the technical field of graphite heaters. Background Technology

[0002] Vacuum furnaces mainly consist of a furnace body, heating system, insulation and temperature measurement system, vacuum system, gas filling system, water cooling system, and control system. Vacuum furnaces are generally operated on a cyclical basis. Common traditional vacuum furnaces include: vacuum quenching furnaces, vacuum brazing furnaces, vacuum annealing furnaces, vacuum tempering furnaces, vacuum diffusion welding furnaces, and vacuum carburizing furnaces. The heating system, as an indispensable component, plays a decisive role in the stability of equipment operation. However, during the heating process and at high temperatures, the graphite heater expands due to the increased temperature, resulting in a significant difference in structural dimensions compared to its room temperature state. This leads to substantial stress in the heater, a high failure rate, and poor stability. Traditional integral mounting rings are prone to deformation at high temperatures due to differences in thermal expansion coefficients, causing poor contact between the graphite column and the electrode components, and even triggering localized overheating. Furthermore, welding or bolting methods can easily introduce impurities or stress concentration, reducing equipment reliability. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a graphite heater for a high-temperature vacuum furnace, thereby improving stability. The heater includes a bottom mounting ring, graphite pillars, and a top mounting ring. The bottom mounting ring comprises a first mounting ring and a second mounting ring, which are connected by a fixing assembly. The fixing assembly includes a first fixing block fixedly connected to the first mounting ring and a second fixing block fixedly connected to the second mounting ring. The first fixing block has a slot, and two sets of fixing pillars are fixedly connected to the top of the first fixing block. The top of each fixing pillar has a threaded structure, on which a spring washer is fitted, and a nut is threadedly connected. The second fixing block has a sliding groove, and a plate is provided at its bottom.

[0004] Furthermore, the graphite column and the bottom mounting ring are connected by a first mounting component. The first mounting component includes a bottom insert block fixedly connected to the bottom of the graphite column. The bottom mounting ring is provided with a first insertion hole, and first limiting grooves are provided on both sides of the first insertion hole. A circular groove is provided at the bottom of the first insertion hole.

[0005] Furthermore, the graphite column and the top mounting ring are connected by a second mounting assembly. The second mounting assembly includes a limiting ring fixedly connected to the graphite column. The top of the graphite column is provided with a top insert block. A second insertion hole is passed through the top mounting ring. Second limiting grooves are provided on both sides of the second insertion hole. The top of the graphite column is provided with a circular hole. A sleeve is provided inside the circular hole. A through groove is provided on one side of the sleeve. A plug slides inside the sleeve. A pressure plate is fixedly connected to the top of the plug.

[0006] Furthermore, both the first mounting ring and the second mounting ring are provided with electrode components at their bottoms, and the two sets of electrode components are respectively located at the middle positions of the first mounting ring and the second mounting ring.

[0007] Furthermore, the first fixing block and the second fixing block are provided in two sets respectively. The shape of the insert plate and the slot is T-shaped and the insert plate slides in the slot. The fixing post slides in the insert plate. The size of the first mounting ring is the same as the size of the second mounting ring.

[0008] Furthermore, the graphite column slides within the first insertion hole, and the bottom insertion block slides within the first limiting groove and rotates within the circular groove, the height of which is greater than the height of the bottom insertion block.

[0009] Furthermore, the top of the graphite column slides within the second insertion hole, the top insertion block slides within the second limiting groove, the top mounting ring is attached to the top of the limiting ring, and the bottom of the plug is frustoconical. Beneficial effects

[0010] I. This utility model connects the first mounting ring and the second mounting ring, and provides a spring washer on the fixing post, which allows for a certain deformation between the accessories. After inserting the graphite post into the first insertion hole, the top mounting ring is inserted into the top of the graphite post and fixed by the sleeve. This allows for quick installation while reducing damage to cost-effective parts caused by thermal expansion and contraction.

[0011] Second, this utility model uses the interference fit between the sleeve and the plug to limit the pressure plate to the top mounting ring, thereby fixing the graphite column to the top mounting ring. Furthermore, during heating, the through groove provides a certain amount of space for movement, which can reduce the squeezing and wear between the parts. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 Local structural explosion of this utility model Figure 1 ;

[0014] Figure 3 This is a partial structural schematic diagram of the present invention;

[0015] Figure 4 This is a cross-sectional view of the structure of this utility model;

[0016] Figure 5 The structural explosion of this utility model Figure 2 .

[0017] In the diagram: 1. Bottom mounting ring; 101. First mounting ring; 102. Second mounting ring; 2. Graphite pillar; 3. Top mounting ring; 401. First fixing block; 402. Slot; 403. Fixing post; 404. Threaded structure; 405. Spring washer; 406. Nut; 407. Second fixing block; 408. Slide groove; 409. Insert plate; 501. Bottom insert block; 502. First insertion hole; 503. First limiting groove; 504. Circular groove; 601. Limiting ring; 602. Top insert block; 603. Second insertion hole; 604. Second limiting groove; 605. Circular hole; 606. Sleeve; 607. Through groove; 608. Plug; 609. Pressure plate; 7. Electrode component. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-5As shown, a graphite heater for a high-temperature vacuum furnace includes a bottom mounting ring 1, graphite pillars 2, and a top mounting ring 3. The bottom mounting ring 1 comprises a first mounting ring 101 and a second mounting ring 102, which are connected by a fixing assembly. The fixing assembly includes a first fixing block 401 fixedly connected to the first mounting ring 101 and a second fixing block 407 fixedly connected to the second mounting ring 102. The first fixing block 401 has a slot 402, and two sets of fixing pillars 403 are fixedly connected to the top of the first fixing block 401. The top of each fixing pillar 403 has a threaded structure 4. 04. A spring washer 405 is fitted onto the threaded structure 404, and a nut 406 is threaded onto the threaded structure 404. A groove 408 is provided on the second fixing block 407, and an insert plate 409 is provided at the bottom of the second fixing block 407. There are six sets of graphite pillars 2. Two sets of fixing pillars 403 are located on both sides of the slot 402. The bottom of the first fixing block 401 is horizontal with the bottom of the first mounting ring 101, and the top of the second fixing block 407 is horizontal with the top of the second mounting ring 102. When the bottom of the second fixing block 407 is attached to the top of the first fixing block 401, the first mounting ring 101 and the second mounting ring 102 are in a horizontal state.

[0020] As a technical optimization of this utility model, the graphite column 2 and the bottom mounting ring 1 are connected by a first mounting assembly. The first mounting assembly includes a bottom insert 501 fixedly connected to the bottom of the graphite column 2. The bottom mounting ring 1 has a first insertion hole 502, and first limiting grooves 503 are respectively provided on both sides of the first insertion hole 502. A circular groove 504 is provided at the bottom of the first insertion hole 502. The graphite column 2 and the top mounting ring 3 are connected by a second mounting assembly. The second mounting assembly includes a limiting ring 601 fixedly connected to the graphite column 2. The top of the graphite column 2 is provided with a top insert block 602, and a second insertion hole 603 is provided through the top mounting ring 3. Second limiting grooves 604 are provided on both sides of the second insertion hole 603. A round hole 605 is provided at the top of the graphite column 2, and a sleeve 606 is provided inside the round hole 605. A through groove 607 is provided on one side of the sleeve 606, and a plug 608 slides inside the sleeve 606. A pressure plate 609 is fixedly connected to the top of the plug 608. Electrode components 7 are provided at the bottom of both the first mounting ring 101 and the second mounting ring 102. The two sets of electrode components 7 are located on the first mounting ring 101 and the second mounting ring 102 respectively. At the midpoint between the first mounting ring 1 and the second mounting ring 102, two sets of the first fixing block 401 and the second fixing block 407 are respectively provided. The insert plate 409 and the slot 402 are both T-shaped, and the insert plate 409 slides in the slot 402. The fixing post 403 slides in the insert plate 409. The size of the first mounting ring 101 is the same as that of the second mounting ring 102. The graphite post 2 slides in the first insertion hole 502. The bottom insert block 501 slides in the first limiting groove 503 and rotates in the circular groove 504. The height of the circular groove 504 is greater than that of the bottom insert block 501. The height of block 501, the bottom of the first socket 502 does not penetrate the bottom mounting ring 1, the top of the graphite column 2 slides in the second socket 603, the top plug 602 slides in the second limiting groove 604, the top mounting ring 3 is attached to the top of the limiting ring 601, the bottom of the plug 608 is frustoconical, the top plug 602 and the bottom plug 501 are set vertically, the shape of the pressure plate 609 is U-shaped, the diameter of the top of the plug 608 is slightly larger than the inner wall diameter of the sleeve 606 in the initial state, and the pressure plate 609 is attached to the top of the top mounting ring 3.

[0021] Working principle: The operator inserts the insert plate 409 at the bottom of the second fixing block 407 into the slot 402 on the first fixing block 401, so that the fixing post 403 is inserted into the sliding groove 408, until the insert plate 409 is fully inserted into the slot 402. Then, the spring washer 405 is fitted onto the fixing post 403, and the nut 406 is tightened to fix the first mounting ring 101 and the second mounting ring 102. The bottom inserts 501 at the bottom of the multiple sets of graphite posts 2 are inserted into the first limiting grooves 503 on both sides of the first insertion hole 502 on the bottom mounting ring 1, so that the bottom inserts 501 are located in the circular groove 504. Rotate the graphite column 2 ninety degrees, then fit the top mounting ring 3 onto the top of the graphite column 2, allowing the top insert 602 to slide within the second limiting groove 604 until the top mounting ring 3 is in contact with the limiting ring 601. Then place the sleeve 606 into the round hole 605 and insert the plug 608 into the sleeve 606. Use a tool to tap the plug 608 until it is fully inserted into the round hole 605. At this point, the sleeve 606 deforms, fixing the plug 608 to the graphite column 2 until the pressure plate 609 is in contact with the top of the top mounting ring 3, thus completely fixing the bottom mounting ring 1, the graphite column 2, and the top mounting ring 3.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A graphite heater for high temperature vacuum furnace comprising a bottom mounting ring (1), a graphite column (2), a top mounting ring (3), characterized in that: The bottom mounting ring (1) includes a first mounting ring (101) and a second mounting ring (102). The first mounting ring (101) and the second mounting ring (102) are connected by a fixing component. The fixing component includes a first fixing block (401) fixedly connected to the first mounting ring (101) and a second fixing block (407) fixedly connected to the second mounting ring (102). The first fixing block (401) is provided with a slot (402). The top of the first fixing block (401) is fixedly connected with two sets of fixing posts (403). The top of the fixing post (403) is provided with a threaded structure (404). A spring washer (405) is sleeved on the threaded structure (404). A nut (406) is threadedly connected to the threaded structure (404). The second fixing block (407) is provided with a sliding groove (408). The bottom of the second fixing block (407) is provided with a plate (409).

2. The graphite heater for a high-temperature vacuum furnace according to claim 1, characterized by: The graphite column (2) is connected to the bottom mounting ring (1) through a first mounting component. The first mounting component includes a bottom insert (501) fixedly connected to the bottom of the graphite column (2). The bottom mounting ring (1) is provided with a first insertion hole (502). The first insertion hole (502) is provided with a first limiting groove (503) on both sides. The bottom of the first insertion hole (502) is provided with a circular groove (504).

3. The graphite heater for a high-temperature vacuum furnace according to claim 2, characterized in that: The graphite column (2) is connected to the top mounting ring (3) via a second mounting assembly. The second mounting assembly includes a limiting ring (601) fixedly connected to the graphite column (2). The top of the graphite column (2) is provided with a top insert (602). The top mounting ring (3) has a second insertion hole (603) through it. The two sides of the second insertion hole (603) are respectively provided with second limiting grooves (604). The top of the graphite column (2) is provided with a round hole (605). A sleeve (606) is provided in the round hole (605). A through groove (607) is provided on one side of the sleeve (606). A plug (608) slides in the sleeve (606). A pressure plate (609) is fixedly connected to the top of the plug (608).

4. A graphite heater for a high-temperature vacuum furnace according to claim 3, characterized in that: Both the first mounting ring (101) and the second mounting ring (102) are provided with electrode components (7) at their bottoms, and the two sets of electrode components (7) are located at the middle positions of the first mounting ring (101) and the second mounting ring (102), respectively.

5. A graphite heater for a high temperature vacuum furnace as claimed in claim 4, characterized in that: The first fixing block (401) and the second fixing block (407) are provided in two sets respectively. The insert plate (409) and the slot (402) are both T-shaped and the insert plate (409) slides in the slot (402). The fixing post (403) slides in the insert plate (409). The size of the first mounting ring (101) is the same as the size of the second mounting ring (102).

6. A graphite heater for a high-temperature vacuum furnace as set forth in claim 5, characterized by: The graphite column (2) slides in the first insertion hole (502), the bottom insertion block (501) slides in the first limiting groove (503) and rotates in the circular groove (504), the height of the circular groove (504) is greater than the height of the bottom insertion block (501).

7. A graphite heater for a high-temperature vacuum furnace as set forth in claim 6, characterized by: The top of the graphite column (2) slides in the second insertion hole (603), the top insertion block (602) slides in the second limiting groove (604), the top mounting ring (3) is attached to the top of the limiting ring (601), and the bottom of the plug (608) is a circular truncated cone.

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