Design device for holding-up hammer preheating block structure of simple cubic press

Abstract

The utility model discloses a design device of a simple cubic press anvil preheating block structure, which relates to the technical field of cubic press anvil preheating, and comprises a preheating block main body, a heating component, a preheating column and a conductive steel cap, wherein the preheating block main body is composed of a pyrophyllite layer and a dolomite layer; the heating assembly comprises graphite paper, conductive steel caps welded to the two ends of the graphite paper and a heating sleeve wrapping the graphite paper. And the conductive steel cap is welded with the graphite paper by using the synthetic block assembly. The problems that thermal stress of the holding-up hammer is concentrated and the service life is shortened due to short-time rapid temperature rise of an existing device are solved The temperature of a cavity in the initial stage of synthesis is unstable, the crystal growth quality is influenced, and a traditional preheating mode is low in efficiency and needs to be supported by additional equipment.

Description

Technical Field

[0001] This utility model relates to the field of preheating technology for top hammers of six-sided top presses, and specifically to a design device for a simple preheating block structure for top hammers of six-sided top presses. Background Technology

[0002] In the six-sided press diamond synthesis process, the top hammer must withstand a high-temperature and high-pressure environment. The temperature of the top hammer has a significant impact on its service life, the quality of the synthesis, and the stability of the synthesis. In existing technologies, the top hammer is usually heated directly from room temperature to the synthesis temperature, leading to the following problems:

[0003] 1. Rapid heating: Rapid heating in a short period of time leads to thermal stress concentration in the top hammer, reducing its service life;

[0004] 2. Uneven temperature: The temperature of the chamber is unstable in the early stage of synthesis, which affects the quality of crystal growth;

[0005] 3. High energy consumption: Traditional preheating methods are inefficient and require additional equipment.

[0006] To solve the above problems, there is an urgent need for a design device for a six-sided top press top hammer preheating block structure that is simple in structure and low in cost, so as to achieve controllable heating and efficient utilization of thermal energy. Utility Model Content

[0007] The purpose of this invention is to provide a design device for a simple six-sided top press top hammer preheating block structure to solve the problems of short-term rapid heating of existing devices leading to thermal stress concentration of the top hammer and reduced service life; unstable cavity temperature in the early stage of synthesis affecting crystal growth quality; and low efficiency of traditional preheating methods requiring additional equipment support.

[0008] A design device for a simple six-sided top press top hammer preheating block structure includes a preheating block body, a heating component, a preheating column, and a conductive steel cap. The preheating block body is composed of a pyrophyllite layer and a dolomite layer. The heating component includes graphite paper, conductive steel caps welded to both ends of the graphite paper, and a heating sleeve wrapping the graphite paper. The conductive steel cap is reused to form a composite block assembly and is welded to the graphite paper.

[0009] Preferably, the dolomite layer is used for heat preservation and to block the high temperature inside the synthesis cavity, and its thickness is 2mm.

[0010] Preferably, the thickness of the graphite paper is 0.3-0.4 mm; the heating elements at both ends and the heating sleeve are all made of graphite.

[0011] Preferably, the preheating column is made from waste material with a density ≥ 2.0 g / cm³. 3 .

[0012] Preferably, the total height of the preheating column, the conductive steel caps at both ends, and the heating paper is equal to the height of the preheating block.

[0013] Preferably, in the preheating process, the heating rate is ≤2℃ / min, the pressure is 60% of the synthesis pressure, and the total duration is 1-1.5 hours depending on the press specifications.

[0014] Preferably, the preheating column has a pressing pressure of 100-200T, a baking temperature of 120℃, and a baking time of 24 hours.

[0015] Preferably, the power is increased in stages: the initial power is 20% of the combined power and maintained for 20 minutes; the second stage increases it to 40% and maintains it for 20 minutes; the final stage increases it to 60% and maintains it for 20 minutes.

[0016] The advantages of this utility model are as follows: The design device of the preheating block structure of the top hammer of the simple six-sided top press in this utility model shortens the preheating time by 30% and reduces the power requirement by 20% by using a 2mm thin layer of dolomite; waste is recycled, reducing material costs by 40%; the resistance of graphite paper is controllable, the heating rate is ≤2℃ / minute, avoiding thermal stress damage, and it is compatible with existing six-sided top presses without the need for equipment modification. Attached Figure Description

[0017] Figure 1 This is a plan view of the internal structure of the preheating block.

[0018] Figure 2 This is a top view of the top hammer.

[0019] Figure 3 This is a side view of the top hammer.

[0020] The structure consists of: 1. Pyrophyllite layer; 2. Dolomite layer; 3. Graphite paper; 4. Conductive steel cap; 5. Heating sleeve; and 6. Preheating column. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 3 As shown, a design device for a simple six-sided top press top hammer preheating block structure includes a preheating block body, a heating component, a preheating column 6, and a conductive steel cap 4. The preheating block body is composed of a pyrophyllite layer 1 and a dolomite layer 2. The heating component includes graphite paper 3, conductive steel caps 4 welded to both ends of the graphite paper 3, and a heating sleeve 5 wrapping the graphite paper 3. The conductive steel cap 4 is a composite block component and is welded to the graphite paper 3.

[0023] In this embodiment, the dolomite layer 2 is used for heat preservation and to block the high temperature inside the synthesis cavity, and its thickness is 2mm.

[0024] In this embodiment, the thickness of the graphite paper 3 is 0.3-0.4 mm; the heating elements at both ends and the heating sleeve 5 are all made of graphite.

[0025] In the above scheme, the advantages of this design are that it is easy to process, low in cost, and the thinner graphite paper 3 can bring a larger resistance, which effectively reduces the current during preheating and lowers energy consumption. The dolomite layer 2 of the composite block serves as insulation to block the high temperature inside the composite cavity. The preheating column 6 is mainly for support, so the requirements for it are not high. Waste dolomite or pyrophyllite materials, or mixtures thereof, can be used. During the production of composite blocks, defective products will be generated. These defective products can be crushed and put back into the cylindrical mold of the required size and pressed to the required height. The function of the dolomite layer 2 of the preheating block is also insulation, but the purpose is reversed here, which is to transfer the temperature inside the cavity to the top hammer. If it is too thick, it will increase the preheating time and preheating power.

[0026] In this embodiment, the preheating column 6 is made from waste material with a density ≥2.0 g / cm³. 3 .

[0027] In this embodiment, the total height of the preheating column 6, the conductive steel caps 4 at both ends, and the heating paper is equal to the height of the preheating block.

[0028] In this embodiment, the heating rate in the preheating process is ≤2℃ / minute, the pressure is 60% of the synthesis pressure, and the total duration is 1-1.5 hours depending on the press specifications.

[0029] In this embodiment, the preheating column 6 has a pressing pressure of 100-200T, a baking temperature of 120℃, and a baking time of 24 hours.

[0030] In this embodiment, the power is increased in stages: the initial power is 20% of the combined power and is maintained for 20 minutes; the second stage increases it to 40% and is maintained for 20 minutes; the final stage increases it to 60% and is maintained for 20 minutes.

[0031] In the above scheme, the following layers are stacked in sequence: dolomite layer 2 → graphite paper 3 → preheating column 6 → conductive steel cap 4, and baked at 120℃ for 24 hours to remove moisture. The pressure is set to 60% of the combined pressure; the power is divided into stages: 20% → 40% → 60%, each stage lasting 20 minutes, for a total duration of 1 hour; after the top hammer temperature reaches 100℃, the pressure is released within 90 seconds to complete the preheating.

[0032] Working Process and Principle: After the required components are processed, they are baked in an oven at 120°C for 24 hours to dehydrate them. Afterward, they can be assembled. Once the preheating block is assembled, it can be directly preheated on the machine. The pressure should be approximately 60% of the synthesis pressure. Power can be set manually or automatically to set the heating curve. The initial power is 20% of the synthesis power, held for 20 minutes; 40% of the synthesis power, held for 20 minutes; and 60% of the synthesis power, held for 20 minutes. The maximum is 60% of the synthesis power. Larger presses can extend the final holding time. The total preheating time is approximately 1 hour for small presses and approximately 1.5 hours for presses with a diameter of Ф750 or larger. Heating can be stopped when the top hammer reaches approximately 100°C. Depressurize directly using the normal depressurization rate during synthesis, generally 90-120 seconds, to complete the preheating process. During this process, pay attention to the preheating rate. Whether the power is applied manually or automatically, the top hammer should not be heated too quickly; the upper limit of the heating rate should be controlled at 2°C / minute.

[0033] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. A design device for a simple six-sided top press top hammer preheating block structure, characterized in that: It includes a preheating block body, a heating component, a preheating column (6) and a conductive steel cap (4). The preheating block body is composed of a pyrophyllite layer (1) and a dolomite layer (2). The heating component includes graphite paper (3), conductive steel caps (4) welded to both ends of the graphite paper (3) and a heating sleeve (5) wrapping the graphite paper (3). The conductive steel cap (4) is a composite block component and is welded to the graphite paper (3).

2. The design device for a simple six-sided top press top hammer preheating block structure according to claim 1, characterized in that: The dolomite layer (2) is used for heat preservation and to block the high temperature inside the synthesis cavity, and its thickness is 2mm.

3. The design device for a simple six-sided top press top hammer preheating block structure according to claim 1, characterized in that: The thickness of the graphite paper (3) is 0.3-0.4 mm; the heating elements at both ends and the heating sleeve (5) are all made of graphite.

4. The design device for a simple six-sided top press top hammer preheating block structure according to claim 1, characterized in that: The preheating column (6) is made from waste material with a density ≥2.0g / cm³.

5. The design device for a simple six-sided top press top hammer preheating block structure according to claim 1, characterized in that: The total height of the preheating column (6), the conductive steel caps (4) at both ends, and the heating paper is equal to the height of the preheating block.

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