阅读说明：本技术 一种基体表面凸凹起伏结构、磨片或磨盘及磨浆机 (Concave-convex fluctuation structure of substrate surface, grinding disc or grinding disc and pulping machine ) 是由 臧田良 臧秉清 施晓刚 燕玉春 于 2021-08-28 设计创作，主要内容包括：本发明涉及一种基体表面凸凹起伏结构、磨片或磨盘及磨浆机。其中,所述基体表面凸凹起伏结构包括：凸棱及凸棱之间形成的凹槽。本发明的基体表面凸凹起伏结构,增加了原材料在磨浆机中的通行路径,延长了原材料在磨浆机中的滞留时间,增加了原材料流动的起伏活跃程度,有利于更充分的处理原材料,提高了原材料处理的质量和效果,还能减少磨片或磨盘在生产过程中产生的变形量及其加工过程中的缺欠,减少废品,降低成本。(The invention relates to a concave-convex fluctuation structure of a substrate surface, a grinding plate or a grinding disc and a pulping machine. Wherein the substrate surface relief structure comprises: the groove is formed between the convex ribs. The concave-convex fluctuation structure of the surface of the base body increases the passing path of raw materials in the pulping machine, prolongs the detention time of the raw materials in the pulping machine, increases the fluctuation activity degree of the raw material flow, is beneficial to more fully processing the raw materials, improves the quality and the effect of processing the raw materials, and can also reduce the deformation amount and the defect of a grinding disc or a grinding disc in the production process, reduce waste products and reduce the cost.)

1. A substrate surface relief structure for a refiner plate or disc of a refiner, wherein the substrate surface relief structure comprises: the grooves are formed among the convex edges and are used for increasing the active degree of the passing path and the flow fluctuation of raw materials;

the convex ribs and the grooves are at least in pairs, and the shapes, the extending directions, the widths, the heights and the arrangement modes of the convex ribs and the grooves in each pair can be set to be the same or different on the grinding plate or the grinding disc.

2. The substrate surface asperity relief structure as recited in claim 1, wherein the height of the substrate surface asperity relief structure is 0 to 20mm, the width of each pair of ridges and grooves is 5 to 100mm, and the height and width are variable as the ridges and grooves extend from the inner diameter to the outer edge of the grinding plate or disc.

3. The substrate surface relief structure according to claim 1, wherein the ribs are prismatic or curved, and the cross-section of the ribs and grooves is one or a combination of trapezoidal, curved, saw-toothed, "W" or "U".

4. The substrate surface relief structure according to claim 1, wherein the substrate surface relief structure extends at an angle to the radial direction of the grinding plate or disc, or perpendicular to the grinding teeth of the grinding plate or disc, or in an opposite direction to the radial direction of the grinding plate or disc with respect to the longitudinal direction of the grinding teeth, or at an angle.

5. The convex-concave undulation structure of the base surface as set forth in claim 1, wherein the ridges and grooves are arranged in a straight line or curved line on the grinding plate or disc, or in a radial pattern or in a grid pattern crossing at different angles.

6. A grinding plate or grinding disc of a refiner is characterized by comprising a grinding tooth working part, a back mounting part and a base body, wherein the grinding tooth working part comprises grinding teeth and tooth grooves between the grinding teeth; the substrate comprises an upper surface and a lower surface, and the substrate surface convex-concave relief structure of any one of claims 1-5 is arranged on the upper surface and/or the lower surface of the substrate.

7. Abrasive sheet or disc according to claim 6, wherein the upper and/or lower substrate surface comprises several different planes, the shape, size and number of the substrate surface relief structures on different of said planes being the same or different.

8. A grinding plate or disc according to claim 6, wherein the base surface ridges and grooves extend continuously or are interrupted at intervals from the inner to the outer edge of the grinding plate or disc.

9. A plate or disc according to claim 6 wherein the highest height of the pimple on the plate or disc is lower than the height of the teeth.

10. Refiner, characterized in that the refiner comprises a refiner plate or a refiner disc according to any one of claims 6-9.

Technical Field

The invention relates to the technical field of pulping, in particular to a grinding disc or a grinding disc with a concave-convex fluctuation structure on the surface of a substrate and a pulping machine.

Background

In the prior art, pulping for paper making, density board production, processing of raw materials for pharmaceutical, starch and food processing cannot be separated from refiners, and the refiners mainly process raw materials containing fibers, cellulose and the like into expected single fiber shapes by using components such as grinding plates, grinding discs and the like which are arranged, and further prepare various products such as pulp, density board plates and the like. The grinding plates or grinding discs are composed of at least one pair of grinding plates or grinding discs which rotate relatively and do not rotate relatively, the rotating grinding plates or grinding discs are called as rotating grinding plates or grinding discs, the non-rotating grinding plates or grinding discs are called as fixed grinding plates or grinding discs, the rotating grinding plates or grinding discs are fixed on a rotating disc and driven to rotate by a power source, and gaps reserved between the rotating grinding plates or the fixed grinding plates or the grinding discs are used for processing raw materials. These abrasive discs or discs differ in their entirety and combination. The grinding plates or grinding discs mainly comprise grinding tooth working parts, base bodies and back surface mounting parts. The back mounting part is a structure of the grinding plate or the grinding disc which is arranged according to the requirements and the size of mounting and fastening with the refiner, and comprises bolt holes, support base planes and various reinforcing structures for increasing the strength of the support base planes. The grinding tooth working part consists of grinding teeth and tooth grooves formed between the grinding teeth, the tooth grooves are used as necessary channels for conveying raw materials, and the bottoms of the tooth grooves are established on the upper surface of the base body. The base is a connecting and reinforcing portion between the back mounting portion and the working portion of the grinding tooth, has different shapes, thicknesses and strengths, and is generally bonded to the back mounting portion and the working portion of the grinding tooth in one or more different planes.

The raw material is conveyed from the inlet end to the outlet end mainly through tooth grooves, and in the process, due to the transverse movement relative to the fixed grinding sheet or the grinding disc caused by the high-speed rotation of the movable grinding sheet or the grinding disc, some raw materials in the tooth grooves are adsorbed into gaps between the movable grinding sheet and the fixed grinding sheet or the grinding disc to be decomposed, crushed, broomed and the like. The effect of the treatment depends, among other things, on the parameters and performance of the refiner, more importantly the shape and size of the refiner teeth of the refiner plate or refiner disc refining work, including the shape and size of the tooth spaces between the refiner teeth. Usually, the gullets are arranged in the upper plane of the base body, and the bottom of the gullets is in one or several different planes. The skilled designer has always focused on developing and designing gear grinding working parts of various shapes and sizes, and neglecting the potential role of the base body. In addition, due to the structure and stress of the grinding sheet or grinding disc, a large amount of deformation or fracture of the grinding sheet or grinding disc often occurs in the manufacturing and processing processes, thereby increasing the difficulty and cost of production and manufacturing.

Disclosure of Invention

The invention aims to solve the defects in the prior art and aims to provide a grinding plate or disc with a concave-convex undulating structure on the surface of a base body and a refiner, which are used for solving the problems in the prior art.

The technical purpose of the invention is realized by the following technical scheme:

a substrate surface relief for a refiner plate or disc of a refiner, said substrate surface relief comprising: the grooves are formed among the convex ribs and are used for increasing the passing path and the fluctuation activity of the flow of the raw materials;

the shape, the extending direction, the width and the arrangement mode of each pair of the convex ribs and the grooves can be set to be the same or different on the grinding plate or the grinding disc.

The above aspects and any possible implementations further provide an implementation that the height of the convex-concave relief structure on the surface of the substrate is 0-20 mm, the width of each pair of the ribs and the grooves is 5-100 mm, and the height and the width can be changed as the ribs and the grooves extend from the inner edge to the outer edge of the grinding plate or the grinding disc.

The above aspects and any possible implementation further provide an implementation, in which the rib is prismatic or curved, and the cross section of the rib and the groove is one or a combination of trapezoidal, curved, saw-toothed, "W" or "U".

The above aspect and any possible implementation further provide an implementation in which the direction of extension of the relief of the surface of the substrate is at an angle to the radial direction of the grinding plate or disc, or perpendicular to the grinding teeth of the grinding plate or disc, or in an opposite direction to the radial direction of the grinding plate or disc, or at an angle with respect to the longitudinal direction of the grinding teeth.

The above aspects and any possible implementations further provide an implementation where the ridges and grooves are linear or curvilinear, or in a radial, or grid-like arrangement intersecting at different angles on the refiner or refiner plate.

The above aspects and any possible implementations further provide an implementation in which the lapping or grinding disc includes a grinding tooth working portion including grinding teeth and tooth spaces between the grinding teeth, a back-surface mounting portion, and a base; the substrate comprises an upper surface and a lower surface, and the substrate surface convex-concave relief structure is arranged on the upper surface and/or the lower surface of the substrate.

The above aspects and any possible implementations further provide an implementation in which the substrate upper and/or lower surfaces include a number of different planes, and the shapes, sizes, and numbers of the substrate surface relief structures on the different planes are the same or different.

The above aspects and any possible implementations further provide an implementation in which the substrate surface ridges and grooves extend continuously or are interrupted at intervals of a certain length from an inner diameter to an outer edge of the grinding plate or disc.

The above aspect and any possible implementation further provide an implementation in which the highest height of the pimple on the plate or disc is lower than the height of the grinding teeth.

The invention also provides a refiner comprising a refiner plate or disc according to the invention.

The invention has the beneficial technical effects that:

the invention provides an embodiment of the concave-convex structure of the surface of the base body, which is used for a grinding plate or a grinding disc of a refiner. The substrate surface convex-concave relief structure comprises: the groove is formed between the convex ribs. The concave-convex fluctuation structure of the surface of the base body increases the passing path of raw materials in the pulping machine, prolongs the detention time of the raw materials in the pulping machine, increases the fluctuation activity degree of the raw material flow, is beneficial to more fully processing the raw materials, improves the quality and the effect of processing the raw materials, and can also reduce the deformation amount and the defect of a grinding disc or a grinding disc in the production process, reduce waste products and reduce the cost.

Drawings

Embodiments of the invention are described in detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic composition of a grinding or grinding disc;

FIG. 2 is a schematic view of a substrate with a relief structure on the surface of the substrate according to a first embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a rib on the surface of a substrate in a second embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a rib on the surface of a substrate in a third embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a rib on the surface of a substrate in a fourth embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a rib on the surface of a substrate in a fifth embodiment of the present invention;

FIG. 7 is a schematic view of a radial array of substrate surface asperities in accordance with an embodiment of the invention;

FIG. 8 is a schematic view of the convex-concave relief structure of the base surface when the ridges are curved in the present embodiment;

FIG. 9 is a schematic view of the undulation of the base surface in a corrugated or zigzag pattern in accordance with an embodiment of the present invention;

FIG. 10 is a schematic view of the surface relief structure of a substrate in a crossed or meshed arrangement according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description is made with reference to the accompanying drawings and specific examples, but the embodiments of the present invention are not limited thereto.

As shown in fig. 1, the flat disc-shaped refiner 10 of the present invention is combined with one of the refiner plates or discs 20, and the refiner plate or disc 20 includes a tooth working portion 30, a base 50, a back surface mounting portion 40, and the like. The back-side mounting portion 40 is a structure for the refiner plate or disc 20 to be set according to the requirements and dimensions of the refiner 10 for mounting and fastening, and includes bolt holes 42, support bases 43, and various reinforcement formations 44 for increasing the strength of these support bases 43. The grinding work portion 30 includes grinding teeth 31 and tooth grooves 32 formed therebetween, the tooth grooves 32 serve as a passage through which the stock material is fed, and the bottom portions 33 of the tooth grooves 32 are provided on the upper surface 51 of the base 50. The base body 50 is provided as a connecting and reinforcing portion between the back mounting portion 40 and the grinding work portion 30, and the base body 50 is provided with a first plane 57 and a second plane 58 which are different. The grinding plate or disc 20 further comprises an inlet 25 and an outlet 27, an inner diameter 24 and an outer edge 26, and the grinding teeth 31 extend from the inner diameter 24 to the outer edge 26 of the grinding plate or disc 20, i.e. from the inlet 25 to the outlet 27.

In the first embodiment of the present invention shown in fig. 2, the relief 52 on the surface of the base 50 is disposed on the upper surface 51 of the base 50, the relief 52 on the surface of the base 50 includes ribs 55 and grooves 56, and the relief 52 on the surface of the base 50 forms an angle α with the radial direction of the grinding plate or disc 20, or with the direction from the inner diameter 24 to the outer edge 26, or with the direction from the inlet 25 to the outlet 27, or with an angle γ 'opposite to the radial direction of the grinding plate or disc 20 with respect to the longitudinal direction of the grinding teeth 31 in the working portion 30 of the grinding teeth, or with an angle γ'. When the tooth grinding work portion 30 is engaged with the upper surfaces 51 of the bases 50, the surface irregularities 52 of the bases 50 appear at the bottoms 33 of the tooth grooves 32, and the surface irregularities 52 of the bases 50 may be distributed over the entire upper surfaces 51 of the bases 50 or portions of the upper surfaces 51 thereof. When the movable grinding plate or the fixed grinding plate or the grinding disc 20 rotates relatively, the relative distance between the concave-convex structures 52 on the surface of the base body 50 arranged on the upper surface 51 of the base body 50 is continuously changed, and is sometimes expanded or reduced, so that the raw material which can originally run towards the outlet 27 along the tooth grooves 32 continuously jumps or is adsorbed along with the change of the height of the bottom 33 of the tooth grooves 32, the probability of the raw material entering the gap between the grinding plates or the grinding disc 20 is increased by the arrangement of the concave-convex structures 52 on the surface of the base body 50, the flow of the raw material in the grinding plates or the grinding disc 20 is more active, meanwhile, the probability of mutual impact among raw material particles is increased, and the treatment achieves better effect. The convex-concave undulating structure 52 on the surface of the base body 50 of the grinding plate or grinding disc 20 does not change the original tooth shape and length, and only the convex-concave undulating flow field is formed on the base body 50 of the grinding plate or grinding disc 20 and combined with the bottom 33 of the tooth grooves 32, so that the flow path of the raw material in the grinding plate or grinding disc 20 is increased, the residence time of the raw material in the grinding plate or grinding disc 20 is prolonged, and the grinding by a refiner is more fully facilitated. The curved surface 62 of the base 50, the ridges 55 and the grooves 56 reduce the resistance of the raw material during the flowing process, and the jumping generated during the flowing process of the raw material is more gradual and labor-saving. The maximum height of the surface relief 52 of the basic body 50 in the grinding plate or grinding disc 20 is always lower than the height of the grinding teeth 31 of the grinding tooth working part 30. The provision of the relief 52 on the substrate 50 significantly improves the quality and effectiveness of the raw material treatment relative to a disc refiner 10 of the same gauge without any treatment of the substrate 50. According to different manufacturing effects of the tooth shapes of different grinding tooth working parts 30, the concave-convex surface undulating structure 52 is arranged on the surface of the base body 50, so that the deformation of the blank body of the grinding plate or the grinding disc 20 caused by the tooth shape structure and stress in the production process and the defects in the processing process can be reduced, waste products are reduced, and the cost is reduced.

As shown in fig. 3, 4, 5, and 6, several embodiments of the improved substrate 50 of the refiner or refiner disc 20 are shown in cross-section. The surface relief structure 52 comprises a rib 55 and a groove 56, wherein the cross section of the rib 55 and the groove 56 is configured as one or a combination of a trapezoid 61, a curve 62, a sawtooth 63, a "W" shape 64 or a "U" shape 65. When the cross-section of the rib 55 is trapezoidal 61, it is generally shaped as a frustum or cone because of the small resistance and the upward lift generated during the mold stripping and the flow of the raw material. The cross section of the convex rib 55 can also be made into a sawtooth shape 63, the groove 56 is a W-shaped 64 or a U-shaped 65, and one or more combinations of convex-concave undulating shapes. The saw-tooth shape 63, the "W" shape 64 or the "U" shape 65 have the effect of gradually reducing and abruptly increasing the cross-sectional shape of the gullets 32, and the raw material is rapidly sucked after being gradually pressed due to the pressure, so that it becomes more active during the process.

Preferably, in the embodiment of the present invention, the protrusions 55 and the grooves 56 of the surface relief 52 of the substrate 50 extend continuously or are separated from each other at a certain distance from the inner diameter 24 to the outer edge 26 of the grinding plate or disc 20, the protrusions 55 and the grooves 56 may be parallel straight lines or curved curves or combined curves, and the shape, height and distance of the surface relief 52 of the adjacent substrate 50 may be the same or different.

Preferably, the height of the convex-concave relief structure 52 on the surface of the base body 50 in the embodiment of the invention is between 0 and 20mm, preferably between 1 and 5mm, and the height of the highest part of the convex rib 55 is always lower than the height of the grinding tooth 31, preferably one third and less than the height of the grinding tooth 31. The width of each pair of the convex ribs 55 and the grooves 56 is between 5 and 100mm, preferably between 10 and 50mm, and the width of the convex ribs 55 and the grooves 56, the height of the convex ribs 55 and the depth of the grooves 56 are equal or different on all or part of the upper surface 51 of the base body 50 of the grinding sheet.

As shown in fig. 7, the surface asperities 52 of the substrate 50 are radially arranged on the upper surface 51 of the substrate 50. In the normal refiner plate or disc 20 design, dams 34 are positioned in the grinding teeth 31 and tooth slots 32 to slow the flow of stock material to the outlet 27 end, the height of the dams 34 being the same as the height of the grinding teeth 31 or less than the height of the grinding teeth 31, such as half the height of the grinding teeth 31. In the embodiment of the present invention, the radial grinding teeth 31 are engaged with the radially arranged convex-concave undulations 52 on the upper surface 51 of the base 50, which does not interfere with the design of the dam 34, but the dam 34 can be replaced or reduced by the advantageous technical effects of the present invention. The height of ridges 55 in the relief 52 on the surface of base 50 near inner diameter 24 may be relatively lower than the height of ridges 55 at outer edge 26, thereby overcoming the undesirable effect of the relatively denser relief 52 on the surface of radial base 50 near inner diameter 24 at second plane 58 of base 50 than at outer edge 26, or pursuing a large, full throughput at inlet 25. In this embodiment, the number of teeth 31 on the upper surface 51 of the first planar surface 57 of the body 50 adjacent the inlet 25 is reduced, and the number of correspondingly arranged ribs 55 and grooves 56 may be reduced. The direction of the convex-concave undulating structure 52 on the upper surface 51 of the base body 50 has an inclination angle alpha of 0-90 degrees with the radial direction of the grinding plate or the grinding disc 20 or the extending direction of the inner diameter 24 to the outer edge 26 or the direction of the inlet 25 to the outlet 27, or is vertical to the grinding teeth 31 of the grinding tooth working part 30, or is inclined by a certain angle beta, or forms an opposite direction angle gamma with respect to the angle gamma' formed by the longitudinal direction of the grinding teeth 31 and the radial direction of the grinding plate or the grinding disc 20, or forms a certain angle of 0-90 degrees, and preferably 5-70 degrees. Due to the tooth geometry and stress of the grinding teeth 31, such as coarse grinding teeth 31 plus wider spacing or higher tooth height, differences in texture transformation of the grinding plate or disc 20 after heat treatment and subsequent uneven heating during cold working and use, the grinding plate or disc 20 may warp and crack. Such deformation becomes noticeable when the direction of extension of the grinding teeth 31 is at a large angle to the radial direction of the grinding plate or disc 20. The provision of the relief 52 on the surface of the base 50 at an angle γ opposite to the angle γ' formed by the longitudinal direction of the grinding teeth 30 and the radial direction of the grinding plate or disc 20 offsets and reduces the partial structural stress due to the inclined grinding teeth 31 and reduces the degree of deformation of the blank body after heat treatment and subsequent correction and cold working chipping caused thereby. The configuration of the asperities 52 on the surface of the substrate 50 can be configured in a variety of shapes and sizes depending on the particular tooth type characteristics of the abrasive sheet or disc 20.

As shown in fig. 8, the ridges 55 and the grooves 56 in the relief structure 52 of the base 50 have a curved shape. Initially, the ridges 55 and grooves 56 are formed at a small angle α' from the inlet 25 relative to the radial direction of the refiner plate or disc 20, which makes the raw material easier to enter, and as the ridges 55 and grooves 56 continue to extend toward the outer edge 26, the angle increases gradually to α, thereby retaining the raw material and slowing the outward flow, and the raised and recessed configuration 52 on the upper surface 51 of the substrate 50 is beneficial to improving the quality of the raw material treatment.

As shown in FIG. 9, the ridges 55 and grooves 56 of the convex-concave relief structure 52 on the surface of the substrate 50 are arranged in a corrugated or zigzag manner, so that the movable and fixed grinding plates or discs 20 with different rotation directions are suitable and have strong adaptability; as shown in fig. 10, the convex-concave relief structure 52 on the surface of the base body 50 is arranged in a cross-like or grid-like arrangement, and the arrangement of the cross-like or grid-like arrangement is suitable for the grinding plate or grinding disc 20 with the longitudinal direction of the grinding teeth 31 having a small inclination angle γ' with the radial direction of the grinding plate or grinding disc 20, and can also be used for different rotation directions, and has strong adaptability. Because the ridges 55 and grooves 56 are arranged in a wave shape or zigzag shape, in a cross-like or grid-like arrangement, and the convex-concave undulating structures 52 on the upper surface 51 of the base body 50 between each pair of grinding plates or grinding discs 20 are not on the same rotation radius, the distance between the ridges 55 and grooves 56 of the opposite grinding plates or grinding discs 20 is increased and decreased along with the rotation of the movable grinding plates or grinding discs 20, and the pulse-like extrusion and absorption of the raw material are continuously generated like a breathing pump, so that the raw material is continuously moved in and out between the tooth surfaces of the grinding teeth 31 and the tooth grooves 32. Due to the relief 52 of the upper surface 51 of the substrate 50 in the gullets 32, the flow of the raw material in the gullets 32 and thus throughout the refiner or refiner disc 20 becomes significantly active, and the chances of fibers and fiber particles in the raw material colliding with each other are significantly increased, which promotes the separation and disintegration, and even fibrillation, of the fibers and fiber bundles.

Preferably, in the embodiment of the present invention, in order to reduce or reduce the deformation of the grinding plate or disc 20 during the manufacturing process thereof and the defect rate during the manufacturing process thereof, the concave-convex structure 52 on the surface of the base 50 is provided on the lower surface of the base 50 combined with the back surface mounting portion 40, i.e. the concave-convex structure 52 on the surface of the base 50 can be provided on both the upper and lower surfaces of the base 50, or alternatively.

These surface relief structures 52 of the substrate 50 can be applied to the refiner plates or plates 20 of a flat disc refiner, a conical refiner or a cylindrical refiner 10.

While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the invention as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.