A graphite furnace bed with a bracket structure

Abstract

This utility model belongs to the field of vacuum quenching furnace technology, and particularly relates to a graphite hearth with a bracket structure. The graphite hearth with a bracket structure includes: several rows of column support members fixedly installed in the heating chamber of the vacuum quenching furnace. Each column support member includes two columns, which are fixedly installed on both sides of the lower end of a crossbeam. The two columns are fixedly connected to the crossbeam via a bracket structure. The bracket structure includes: mounting brackets and mounting arches fixedly installed on the columns. The mounting arches support the upper ends of the mounting brackets, and upper mounting brackets are respectively provided at both ends of the mounting arches. The crossbeam is fixedly installed on the two upper mounting brackets. The advantages of this utility model are: the bracket structure effectively supports the crossbeam, increasing the support area and stability of the columns on the crossbeam, preventing breakage during long-term use, ensuring product quality, greatly increasing service life, and making use safer.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum quenching furnace technology, and particularly relates to a graphite furnace bed with a bracket structure. Background Technology

[0002] Quenching is a heat treatment process in which steel parts are heated to the austenitizing temperature and held for a certain time, and then cooled at a rate greater than the critical cooling rate to obtain a non-diffusion transformation structure, such as martensite, bainite and austenite. Vacuum quenching furnaces are suitable for solution treatment and aging treatment of large and medium-sized vacuum product parts.

[0003] A vacuum quenching furnace is a device that performs quenching treatment in a vacuum environment. Its working principle is to place the workpiece to be treated in the heating chamber, first evacuate the furnace to remove air and impurities, and then heat the workpiece to the predetermined temperature through the heating elements in the heating chamber. After reaching the required temperature, cooling gas is quickly introduced to perform quenching treatment.

[0004] The furnace bed structure of a modern vacuum air quenching furnace includes: several rows of column support members fixedly installed within the heating chamber of the vacuum air quenching furnace; adjacent rows of column support members are fixedly connected at their midpoints by connectors; each row of column support members has a crossbeam at its upper end; each column support member includes two columns, which are fixedly installed on both sides of the lower end of the crossbeam. In use, a stainless steel tray is placed on the crossbeam, and the round workpiece to be heated is placed on the stainless steel tray.

[0005] The existing vacuum gas quenching furnace has a large span between the two columns on either side of the lower end of the hearth beam. Prolonged use can lead to damage due to the high-speed airflow. During repeated heating and cooling processes, the material may experience thermal fatigue and uneven thermal expansion, resulting in fracture, affecting product quality, shortening service life, and posing safety risks. Therefore, it is necessary to design a new vacuum gas quenching furnace hearth structure to solve these technical problems. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a graphite furnace bed with a bracket structure.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a graphite furnace bed with a bracket structure, comprising: several rows of column support members fixedly installed in the heating chamber of a vacuum quenching furnace, with adjacent rows of column support members fixedly connected in the middle by connectors, each row of column support members having a crossbeam at its upper end, each column support member including two columns, the two columns being fixedly installed on both sides of the lower end of the crossbeam, the two columns being fixedly connected to the crossbeam by a bracket structure, the bracket structure including: mounting brackets and mounting arches fixedly installed on the columns, the mounting arches supporting the upper ends of the mounting brackets, upper mounting brackets being provided at both ends of the mounting arches, the crossbeams being fixedly installed on the two upper mounting brackets, upper mounting grooves being provided in the two upper mounting brackets, the lower end of the crossbeams being provided in the upper mounting grooves that cooperate with them, lower mounting grooves being provided in the mounting brackets, and the lower end of the mounting arches being provided in the lower mounting grooves that cooperate with them.

[0008] To solve the above-mentioned technical problems, the present invention adopts a further technical solution: the upper end of the column is fixedly connected to the mounting bucket by a lower fixing pin, and the upper end of the mounting arch is fixedly connected to the upper mounting bucket by an upper fixing pin.

[0009] To solve the above-mentioned technical problems, the present invention adopts a further technical solution as follows: a trapezoidal mounting groove is provided at the upper end of the crossbeam, a trapezoidal support block that cooperates with it is provided in the trapezoidal mounting groove, limit screws are respectively provided in the trapezoidal mounting grooves at both ends of the cooperating trapezoidal support block, and the upper end of the trapezoidal support block is higher than the trapezoidal mounting groove by a certain distance.

[0010] To solve the above-mentioned technical problems, the present invention adopts a further technical solution: the trapezoidal support block is made of alumina ceramic material.

[0011] To solve the above-mentioned technical problems, the present invention adopts a further technical solution as follows: the connecting member includes: a column connecting rod and two connecting nuts that cooperate with it. The column connecting rod passes through the connecting hole inside the column to fix several columns together, and the two connecting nuts are respectively sleeved on both ends of the column connecting rod.

[0012] To solve the above-mentioned technical problems, the present invention adopts a further technical solution: the column connecting rod and the connecting nut are made of high-temperature molybdenum material.

[0013] To solve the above-mentioned technical problems, the present invention adopts a further technical solution: the column connecting rod and the connecting nut are made of C / C composite material.

[0014] To solve the above-mentioned technical problems, the present invention adopts a further technical solution: the column, beam, mounting bracket and mounting arch are all made of isostatic graphite material.

[0015] To solve the above-mentioned technical problems, the present invention adopts a further technical solution: the column is made of C / C composite material.

[0016] To solve the above-mentioned technical problems, the present invention adopts a further technical solution: three rows of column support members are fixedly installed in the heating chamber of the vacuum quenching furnace.

[0017] The advantages of this utility model are: the use of a bracket structure to effectively support the crossbeam, expanding the support area and stability of the support column on the crossbeam, preventing breakage during long-term use, ensuring product quality, greatly increasing service life, and making it safer to use.

[0018] The trapezoidal support block is made of alumina ceramic material, which has good conductivity, mechanical strength and high temperature resistance.

[0019] The column connecting rod and connecting nut are made of high-temperature molybdenum material or C / C composite material. The C / C composite material gives it higher strength and corrosion resistance.

[0020] The columns, beams, mounting brackets, and mounting arches are all made of isostatic graphite. Isostatic graphite has superior physical properties compared to high-purity graphite, giving it higher density, higher strength, and better corrosion resistance.

[0021] The columns are made of C / C composite material, which gives them higher strength and corrosion resistance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a graphite furnace bed with a bracket structure according to this utility model.

[0023] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction.

[0024] In the diagram: 1. Column support, 10. Bracket structure, 11. Column, 2. Horizontal beam, 21. Trapezoidal mounting groove, 22. Limiting screw, 3. Mounting bracket, 4. Mounting arch, 41. Upper mounting bracket, 5. Lower fixing pin, 6. Upper fixing pin, 7. Trapezoidal support block, 8. Column connecting rod, 9. Connecting nut. Detailed Implementation

[0025] The specific content of this utility model will now be described in conjunction with the accompanying drawings and specific embodiments.

[0026] like Figure 1and Figure 2 As shown, a graphite furnace bed with a bracket structure includes: several rows of column support members 1 fixedly installed in the heating chamber of a vacuum quenching furnace; adjacent rows of column support members 1 are fixedly connected at their middle parts by connectors; each row of column support members 1 has a crossbeam 2 at its upper end; each column support member 1 includes two columns 11, which are fixedly installed on both sides of the lower end of the crossbeam 2; the two columns 1 and the crossbeam 2 are fixedly connected by a bracket structure 10; the bracket structure 10 includes: mounting buckets 3 and mounting arches 4 fixedly installed on the columns 11; the mounting arches 4 are supported on the upper end of the mounting buckets 3; upper mounting buckets 41 are respectively provided at both ends of the mounting arches 4; the crossbeam 2 is fixedly installed on the two upper mounting buckets 41; upper mounting grooves are provided in the two upper mounting buckets 41; the lower end of the crossbeam 2 is located in the upper mounting groove that cooperates with it; a lower mounting groove is provided in the mounting bucket 3; and the lower end of the mounting arch 4 is located in the lower mounting groove that cooperates with it.

[0027] In this embodiment, the upper end of the column 11 is fixedly connected to the mounting bucket 3 by a lower fixing pin 5, and the upper end of the mounting arch 4 is fixedly connected to the upper mounting bucket 41 by an upper fixing pin 6.

[0028] In this embodiment, a trapezoidal mounting groove 21 is provided at the upper end of the crossbeam 2, and a trapezoidal support block 7 that cooperates with it is provided in the trapezoidal mounting groove 21. Limiting screws 22 are respectively provided in the trapezoidal mounting groove 21 at both ends of the cooperating trapezoidal support block 7. The upper end of the trapezoidal support block 7 is higher than the trapezoidal mounting groove 21 by a certain distance. In use, a stainless steel tray is placed on the crossbeam 2, and the round workpiece that needs to be heated is placed on the stainless steel tray.

[0029] In this embodiment, the trapezoidal support block 7 is made of alumina ceramic material, which has good conductivity, mechanical strength and high temperature resistance.

[0030] In this embodiment, the connector includes: a column connecting rod 8 and two connecting nuts 9 that cooperate with it. The column connecting rod 8 passes through the connecting hole inside the column 11 to fix several columns 11 together, and the two connecting nuts 9 are respectively sleeved on both ends of the column connecting rod 8.

[0031] In this embodiment, the column connecting rod 8 and the connecting nut 9 are made of high-temperature molybdenum material. In actual use, the column connecting rod 8 and the connecting nut 9 can also be made of C / C composite material to give them higher strength and corrosion resistance.

[0032] In this embodiment, the column 11, the beam 2, the mounting bucket 3 and the mounting arch 4 are all made of isostatic graphite. Isostatic graphite has better physical properties than high-purity graphite, giving it higher density, higher strength and better corrosion resistance.

[0033] In actual use, the column 11 can also be made of C / C composite material, which gives it higher strength and corrosion resistance.

[0034] In this embodiment, three rows of column support members 1 are fixedly installed in the heating chamber of the vacuum quenching furnace.

[0035] The advantages of this utility model are: the use of a bracket structure to effectively support the crossbeam, expanding the support area and stability of the support column to the crossbeam, preventing breakage due to excessive span B between the two columns 11 during long-term use, ensuring product quality, greatly increasing service life, and making it safer to use.

[0036] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from the spirit and scope of this utility model, and all such changes and modifications should fall within the scope of this utility model as claimed.

Claims

1. A graphite furnace bed with a bracket structure, comprising: Several rows of column support members (1) are fixedly installed in the heating chamber of a vacuum quenching furnace. The middle of two adjacent rows of column support members (1) are fixedly connected by connectors. Each row of column support members (1) is provided with a crossbeam (2) at its upper end. Each column support member (1) includes two columns (11). The two columns (11) are fixedly installed on both sides of the lower end of the crossbeam (2). The feature is that the two columns (11) and the crossbeam (2) are fixedly connected by a bracket structure (10). The bracket structure (10) includes: fixedly installed on The column (11) has an installation bucket (3) and an installation arch (4). The installation arch (4) is supported on the upper end of the installation bucket (3). Upper installation buckets (41) are respectively provided at both ends of the installation arch (4). The crossbeam (2) is fixedly installed on the two upper installation buckets (41). Upper installation grooves are provided in the two upper installation buckets (41). The lower end of the crossbeam (2) is set in the upper installation groove that cooperates with it. A lower installation groove is provided in the installation bucket (3). The lower end of the installation arch (4) is set in the lower installation groove that cooperates with it.

2. A graphite furnace bed with a bracket structure according to claim 1, characterized in that: The upper end of the column (11) is fixedly connected to the mounting bucket (3) by a lower fixing pin (5), and the upper end of the mounting arch (4) is fixedly connected to the upper mounting bucket (41) by an upper fixing pin (6).

3. A graphite furnace bed with a bracket structure according to claim 2, characterized in that: A trapezoidal mounting groove (21) is provided at the upper end of the crossbeam (2), and a trapezoidal support block (7) that cooperates with it is provided in the trapezoidal mounting groove (21). Limiting screws (22) are respectively provided in the trapezoidal mounting groove (21) at both ends of the cooperating trapezoidal support block (7). The upper end of the trapezoidal support block (7) is higher than the trapezoidal mounting groove (21) by a certain distance.

4. A graphite furnace bed with a bracket structure according to claim 3, characterized in that: The trapezoidal support block (7) is made of alumina ceramic material.

5. A graphite furnace bed with a bracket structure according to claim 1, characterized in that: The connector includes a column connecting rod (8) and two connecting nuts (9) that cooperate with it. The column connecting rod (8) passes through the connecting hole inside the column (11) to fix several columns (11) together. The two connecting nuts (9) are respectively sleeved on both ends of the column connecting rod (8).

6. A graphite furnace bed with a bracket structure according to claim 5, characterized in that: The column connecting rod (8) and connecting nut (9) are made of high-temperature molybdenum material.

7. A graphite furnace bed with a bracket structure according to claim 5, characterized in that: The column connecting rod (8) and connecting nut (9) are made of C / C composite material.

8. A graphite furnace bed with a bracket structure according to claim 1, characterized in that: The columns (11), beams (2), mounting buckets (3) and mounting arches (4) are all made of isostatic graphite.

9. A graphite furnace bed with a bracket structure according to claim 1, characterized in that: The column (11) is made of C / C composite material.

10. A graphite furnace bed with a bracket structure according to claim 1, characterized in that: The vacuum quenching furnace heating chamber is fixedly equipped with three rows of column support members (1).

Images