Pyrophyllite block capable of preventing powder falling
By laying a soft elastic adhesive coating on the edges of the six-sided top press siliceous stone block, the problem of the easy depowder of the stone block during compression is solved, and higher usage stability and lower incidence of hammer extrusion events are achieved.
Patent Information
- Application Number
- CN202422236199.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The existing six-sided top press slurry stones are prone to depowder during compression, resulting in increased seal failure and hammer squeeze events, especially when using slurry stones in other production areas such as South Africa.
A soft and elastic adhesive coating is laid on the twelve edges of the wax stone. The width and thickness of the coating are within a specific range. The materials include rubber, latex, polyurethane and SBS, and the elongation of break is greater than 25%.
It effectively prevents the edges of the lever stones from falling off and the cracking of the sealing edges, reduces the occurrence of hammer squeezing incidents, and improves the stability of the use of lever stones and the smoothness of production.
Smart Images
Figure CN222789163U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of high-pressure synthesis of superhard materials, and more specifically to a pyrophyllite block, a pressure-transmitting medium used for high-temperature and high-pressure synthesis in a six-sided top press. Background Art
[0002] Since the 1960s, using domestic six-sided top presses to generate ultra-high pressure has been the main technical route for my country's superhard material industry, and from the foreseeable future, there is no alternative to the existing technology. The diamond and cubic boron nitride raw materials and some superhard material products required by the superhard material industry, including but not limited to integrally sintered polycrystalline and polycrystalline composite sheets, are inseparable from the six-sided top press and its supporting equipment and materials.
[0003] Pyrophyllite has long been an indispensable and important material in the six-sided top press technology and has also played an important role. However, as high-quality mineral resources have been mined out, most domestic manufacturers have gradually adopted pyrophyllite from other production areas such as South Africa as a pressure transmission medium in recent years, but the effect of pyrophyllite from South Africa and other regions is worse than that of domestic pyrophyllite. This situation is mainly reflected in the increase in the consumption of cemented carbide top hammers, including blasting and hammer squeeze events, which has a significant negative impact on the smooth production and operating costs of enterprises.
[0004] The existing technology for producing pyrophyllite blocks is to extrude and bond granular pyrophyllite mixed with an adhesive by a cold press. During use, the carbide top hammer surface needs to contact and compress the pyrophyllite block under the push of hydraulic oil, causing the pyrophyllite block to deform. The pyrophyllite in the cubic area enclosed by the top hammer surface is used for pressure transmission and pressure maintenance, and the strip pyrophyllite contained in the wedge-shaped seam of the adjacent top hammer is used for sealing. Because the strip pyrophyllite undergoes plastic deformation during its formation, and the pyrophyllite block is crushed into particles again during the deformation process, it is easy to fall off partially or as a whole under the action of gravity. Under normal circumstances, the shedding within the field of vision can be observed by the operator's eyes, but the pyrophyllite powdering that occurs on the back of the charging port cannot be observed. Once this happens, it will cause hammer extrusion and economic losses. In recent years, the proportion of hammer extrusion caused by the above-mentioned powdering when using pyrophyllite blocks from other production areas such as South Africa is significantly higher than that of domestic pyrophyllite blocks.
[0005] Based on the above-mentioned shortcomings of the existing six-sided top press pyrophyllite blocks, it is necessary to make appropriate improvements to the existing pyrophyllite blocks to reduce the probability of powdering events as much as possible. Utility Model Content
[0006] The utility model provides a pyrophyllite block capable of preventing powdering, and solves the problem of easy powdering occurring during the compression process of the pyrophyllite in the prior art.
[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:
[0008] A pyrophyllite block for preventing powdering comprises a pyrophyllite block body, wherein the pyrophyllite block body is a cubic structure, the pyrophyllite block body is provided with columnar through holes, and a soft elastic adhesive coating is applied on twelve edges of the pyrophyllite body.
[0009] Therein, the adhesive coating is parallel to the applied edge.
[0010] Wherein, the width of the adhesive coating on any surface of the pyrophyllite block body is greater than or equal to 3.0 mm and less than or equal to 8.0 mm.
[0011] Wherein, the thickness of the adhesive coating is greater than or equal to 0.3 mm and less than or equal to 1.0 mm.
[0012] Wherein, the adhesive coating is a rubber coating, latex coating, polyurethane coating or SBS coating with a breaking elongation greater than 25%.
[0013] Among them, the talc block body is composed of a talc block upper body, a talc block lower body and a dolomite annular lining with columnar through holes. The talc block upper body and the talc block lower body form a cube structure. The interiors of the talc block upper body and the talc block lower body are provided with grooves that are compatible with the dolomite annular lining. The through holes of the dolomite annular lining have the same aperture as the through holes of the talc block upper body and the talc block lower body.
[0014] Wherein, the dolomite annular liner is a hyperbolic structure, and the ratio of the diameter of the end portion of the dolomite annular liner to the diameter of the waist is (1.2-2):1.
[0015] The invention also includes a square outer middle ring, which is sleeved in the middle of the side surface of the pyrophyllite body parallel to the columnar through hole and is flush with the side surface of the pyrophyllite body.
[0016] Under the pressure of the top hammer of the six-sided top press, when the top surfaces of the six top hammers are close to the surface of the pyrophyllite cube and press it, the six top hammers approach each other to form a hexahedral pyrophyllite block with twelve wedges. The pyrophyllite cube is divided into a compressed part and a flowable part. The pyrophyllite in the twelve edge areas of the cube flows into the wedges, and the pyrophyllite within the top surface is mainly compressed. Under the action of the wedges, the flow process of the pyrophyllite ends as the molds approach each other as the pressure increases, thus forming a sealing system, that is, forming an ultra-high pressure cavity, forming an ultra-high pressure environment.
[0017] The displacement deformation stage of the pressure process, the plastic flow stage from the initial stage of pressure application to the shear edge process, as the pressure continues to increase, the flash pressure increases, increasing the internal friction and wedge effect to enter the sealing stage, and finally enters the compression stage of the ultra-high pressure process. The aforementioned powder shedding event occurred in the displacement deformation stage at the initial stage of pressure application. By applying a certain thickness of adhesive coating on the twelve edges of the pyrophyllite block body, the sealing edge particles or the sealing edge that has fallen off as a whole due to the deformation and plastic deformation of the pyrophyllite block can be effectively held to prevent it from falling off.
[0018] Because the twelve edges of the talc block will extend in length due to displacement deformation in the process of forming a sealing edge, the elongation is between 16% and 23%. The adhesive coating provided by the present technical solution is a soft elastic material, including rubber, latex, polyurethane, and SBS, and its elongation at break is not less than 25%, which is sufficient to match the large extension of the edges of the talc block without damage and failure.
[0019] The beneficial effects of the utility model are:
[0020] The utility model adopts a method of laying a layer of soft elastic adhesive coating with a certain thickness on the edge of the pyrophyllite block in the prior art, which can effectively hold the powder or overall shedding of the pyrophyllite block edge, and at the same time can adapt to the elongation of the edge caused by the plastic deformation of the pyrophyllite block edge without breaking, effectively preventing the hammer extrusion incident caused by the sealing failure caused by the shedding of powder of the pyrophyllite block used in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.
[0023] Figure 1 Schematic diagram of the structure of the pyrophyllite block in Example 1.
[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of the pyrophyllite block in Example 5.
[0025] In the figure, 1. pyrophyllite block body, 1-1. pyrophyllite block upper body, 1-2. pyrophyllite block lower body, 2. adhesive coating, 3. columnar through hole, 4. dolomite ring liner, 5. outer middle ring DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1
[0027] like Figure 1 As shown, this embodiment provides a talc block for preventing powdering, including a talc block body 1, the talc block body 1 is a cubic structure, the talc block body 1 is provided with a columnar through hole 3, and a soft elastic adhesive coating is applied on the twelve edges of the talc body, and the adhesive coating 2 is parallel to the applied edges.
[0028] In this embodiment, the side length of the talc block body 1 is 44.0 mm, the diameter of the columnar through hole 3 is 25.0 mm, the thickness of the adhesive coating 2 is 0.3 mm, the width of the adhesive coating 2 is 3.0 mm, the material of the adhesive coating 2 is rubber adhesive, and the elongation at break is greater than 25%. Example 2
[0029] The present embodiment provides a talc block for preventing powdering, including a talc block body 1, the talc block body 1 is a cubic structure, the talc block body 1 is provided with a columnar through hole 3, and a soft elastic adhesive coating 2 is applied on the twelve edges of the talc body, and the adhesive coating 2 is parallel to the applied edges.
[0030] In this embodiment, the side length of the talc block body 1 is 54.0 mm, the diameter of the columnar through hole 3 is 36.0 mm, the thickness of the adhesive coating 2 is 0.3 mm, the width of the adhesive coating 2 is 4.0 mm, the adhesive coating material is latex adhesive, and the elongation at break is greater than 50%. Example 3
[0031] The present embodiment provides a talc block for preventing powdering, including a talc block body 1, the talc block body 1 is a cubic structure, the talc block body 1 is provided with a columnar through hole 3, and a soft elastic adhesive coating is applied on the twelve edges of the talc body, and the adhesive coating is parallel to the applied edges.
[0032] In this embodiment, the side length of the talc block body 1 is 66.0 mm, the inner hole diameter is 50.0 mm, the adhesive coating thickness is 0.7 mm, the adhesive coating width is 6.0 mm, the adhesive coating material is polyurethane adhesive, and the elongation at break is greater than 100%. Example 4
[0033] The present embodiment provides a talc block for preventing powdering, including a talc block body 1, the talc block body 1 is a cubic structure, the talc block body 1 is provided with a columnar through hole 3, and a soft elastic adhesive coating 2 is applied on the twelve edges of the talc body, and the adhesive coating 2 is parallel to the applied edges.
[0034] In this embodiment, the side length of the talc block body 1 is 86.0 mm, the inner hole diameter is 69.0 mm, the thickness of the adhesive coating 2 is 1.0 mm, the width of the adhesive coating 2 is 8.0 mm, the material of the adhesive coating 2 is SBS adhesive, and the elongation at break is greater than 100%. Example 5
[0035] like Figure 2 As shown, this embodiment provides a pyrophyllite block for preventing powder from falling off, including a pyrophyllite block body 1, the pyrophyllite block body 1 is a cubic structure, the pyrophyllite block body 1 is provided with a columnar through hole 3, and a soft elastic adhesive coating 2 is applied on the twelve edges of the pyrophyllite body, and the adhesive coating 2 is parallel to the applied edges. The pyrophyllite block body 1 is composed of a pyrophyllite block upper body 1-1, a pyrophyllite block lower body 1-2, a dolomite annular lining body 4 with a columnar through hole 3, and a square outer intermediate ring 5. The pyrophyllite block upper body 1-1 and the pyrophyllite block lower body 1-2 are surrounded by a cubic structure, and the interior of the pyrophyllite block upper body 1-1 and the pyrophyllite block lower body 1-2 is provided with a groove adapted to the dolomite annular lining body 4, and the through hole of the dolomite annular lining body 4 has the same aperture as the through hole of the pyrophyllite block upper body 1-1 and the pyrophyllite block lower body 1-2. The dolomite annular liner 4 is a hyperbolic structure, and the ratio of the diameter of the end of the dolomite annular liner 4 to the diameter of the waist is 1.4:1. The annular liner with a hyperbolic structure solves the problem of uneven temperature and pressure fields in the synthesis cavity to a certain extent, thereby improving the single synthesis output and quality of superhard materials. In addition, the annular liner is made of dolomite, which avoids the problem of easy phase change of pyrophyllite inside the columnar through hole 3.
[0036] The outer intermediate ring 5 is sleeved in the middle of the side of the pyrophyllite body parallel to the columnar through hole 3 and is flush with the side of the pyrophyllite body. After the outer intermediate ring 5 is sleeved on the pyrophyllite upper body 1-1 and the pyrophyllite lower body 1-2, a complete pyrophyllite block is formed.
[0037] The outer intermediate ring 5 sets serve as the transition part between the pyrophyllite upper body 1-1 and the pyrophyllite lower body 1-2, and have higher sealing performance and better pressure transmission effect after being combined with the white cloud annular liner.
[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A pyrophyllite block for preventing powdering, comprising a pyrophyllite block body, wherein the pyrophyllite block body is a cubic structure, and the pyrophyllite block body is provided with a columnar through hole, characterized in that: Twelve edges of the pyrophyllite body are coated with a soft and elastic adhesive coating.
2. The pyrophyllite block for preventing powdering according to claim 1, characterized in that: The adhesive coating is parallel to the applied edge.
3. The pyrophyllite block for preventing powdering according to claim 1, characterized in that: The width of the adhesive coating on any surface of the pyrophyllite block body is greater than or equal to 3.0 mm and less than or equal to 8.0 mm.
4. The pyrophyllite block for preventing powdering according to claim 1, characterized in that: The thickness of the adhesive coating is greater than or equal to 0.3 mm and less than or equal to 1.0 mm.
5. The pyrophyllite block for preventing powdering according to claim 1, characterized in that: The adhesive coating is a rubber coating, a latex coating, a polyurethane coating or a SBS coating with a breaking elongation greater than 25%.
6. The pyrophyllite block for preventing powdering according to claim 1, characterized in that: The talc block body is composed of a talc block upper body, a talc block lower body and a dolomite annular lining with columnar through holes. The talc block upper body and the talc block lower body form a cube structure. The interiors of the talc block upper body and the talc block lower body are provided with grooves that are compatible with the dolomite annular lining. The through holes of the dolomite annular lining have the same aperture as the through holes of the talc block upper body and the talc block lower body.
7. The pyrophyllite block for preventing powdering according to claim 6, characterized in that: The dolomite annular liner is a hyperbolic structure, and the ratio of the diameter of the end portion of the dolomite annular liner to the diameter of the waist is (1.2-2):
1.
8. The pyrophyllite block for preventing powdering according to claim 6, characterized in that: It also comprises a square outer middle ring, which is sleeved on the middle of the side of the pyrophyllite body parallel to the columnar through hole and is flush with the side of the pyrophyllite body.