Grinding disc and rotor valve assembly, dry spraying machine and wet spraying machine

Abstract

The invention discloses a millstone and rotor valve assembly, a dry spraying machine and a wet spraying machine, a rotor valve comprises a rotor body and rotor lining plates connected to the upper end and the lower end of the rotor body respectively, a millstone comprises an upper millstone and a lower millstone which are made of wear-resistant metal materials, and each rotor lining plate comprises a lining plate and a rubber disc which are connected with each other; the rubber discs of the two rotor lining plates are used for being in sliding sealing with the upper millstone and the lower millstone respectively. The dry spraying machine and the wet spraying machine each comprise the grinding disc and the rotor valve assembly. The upper millstone and the lower millstone are designed to be wear-resistant metal structural parts, so that wear of a feed port of the upper millstone and a discharge port of the lower millstone is effectively avoided; furthermore, the steel lining plates at the upper end and the lower end of the rotor valve are designed into composite rotor lining plates, so that the rubber discs in the rotor lining plates are in sliding seal with the upper millstone or the lower millstone, and the rotor lining plates at the upper end and the lower end of the rotor valve rotate at a constant speed, so that the rubber discs in the rotor lining plates can be in uniform contact with the feed port / discharge port; and the eccentric wear phenomenon is effectively relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of the rotor valve of a spraying device, in particular to a grinding disc, a rotor valve assembly, a dry spraying machine, and a wet spraying machine. Background Art

[0002] During the tunneling of a shield TBM, the backfilling behind the tunnel wall is a key step in ensuring the safety of tunnel construction. At present, the main materials for the backfill behind the wall are pea gravel, sand and gravel, etc. During the construction process, a pea gravel pump needs to be frequently used for transportation. The commonly used pea gravel spraying pump forms a spraying chamber with a rubber grinding disc and a rotor valve to transport materials. The rubber grinding disc, also known as a rubber sealing plate, is used for feeding and sliding sealing with the rotor valve. The rotational friction between the rubber grinding disc and the steel lining plate of the rotor valve can cause phenomena such as local dry grinding, eccentric grinding, and scraping during the operation process, which are likely to result in frictional damage, causing problems such as increased costs and affecting the construction progress.

[0003] In recent years, research on reducing the wear of rubber grinding discs has gradually emerged, mostly by adding some wear-resistant materials or improving the lubrication effect of grease to reduce wear. For example, the invention patent applied by the applicant earlier, with the publication date of May 5, 2023 and the publication number of CN 116061099 A, specifically discloses a grinding disc structure and production process of a pea gravel pump, including an upper grinding disc and a lower grinding disc. The upper grinding disc is provided with a feed port, and the lower grinding disc is provided with a discharge port; grease injection holes are provided inside the upper grinding disc and / or the lower grinding disc, and the grease injection holes communicate with the grease lubrication holes provided on the working surfaces of the upper grinding disc and / or the lower grinding disc; the upper grinding disc and the lower grinding disc are both composite grinding discs, and the composite grinding disc is preferably a composite grinding disc of steel plate, rubber and ceramic. The upper grinding disc and the lower grinding disc are made by inlaying materials such as steel plates, polyurethane rubber and ceramics, which can effectively solve problems such as grinding disc wear and plate burning during the operation of the pea gravel pump, improve the wear resistance and mechanical strength of the grinding disc, and thus extend the service life of the grinding disc. However, this only alleviates the wear of the grinding disc to a certain extent, and the production of the grinding disc will also become complicated.

[0004] Another example is the utility model patent previously applied for by the applicant, with the authorization announcement date of 2023.12.08 and the authorization announcement number of CN 220151535 U, which specifically discloses a rotary friction pair lubrication energy-saving system and a bean gravel pump, including a rotor part and a stator part, the rotor part is connected to a drive part with a frequency converter, the drive part drives the rotor part to rotate and cooperates with the stator part to form a rotary friction pair; the stator part is provided with a lubricating oil filling system, the lubricating oil filling system is electrically connected to the output end of the controller, and the frequency converter is electrically connected to the input end of the controller. The above rotary friction pair lubrication energy-saving system can effectively monitor and feedback the amount of grease used in the rotary friction pair position, realize intermittent grease injection control, effectively reduce the amount of grease used, and reduce the amount of lubricating grease used and the start-up time of the lubricating grease pump under the premise of ensuring the service life of the rotary friction pair, thereby achieving energy saving and environmental protection, and improving the economic and social effects of the product.

[0005] In summary, the existing friction reduction technology solution for the injection cavity is to use a composite grinding disc or an improved lubrication channel. Although the wear resistance at the feed port can be improved, the structure and production process of the composite grinding disc become complicated and the wear resistance is limited. At the same time, since the steel lining of the rotor valve and the steel lining of the composite grinding disc are matched, it is a rigid structure and a rigid structure. When the feed port of the composite grinding disc is worn, since the feed port is fixed and the rotor valve rotates continuously, the material will enter between the steel lining of the rotor valve and the steel lining of the composite grinding disc and aggravate the wear, causing local dry grinding, eccentric grinding, scraping and other phenomena, and then easily causing friction damage. Therefore, it is very necessary to design a grinding disc and rotor valve with a simple structure and not easy to wear.

[0006] It should be particularly noted that the above technical information is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as admitting or implying in any form that the above technical information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0007] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a grinding disc and rotor valve assembly, a dry spraying machine and a wet spraying machine. The technical problem to be solved is: how to alleviate the eccentric wear of the grinding disc and rotor valve with simple structure and production process.

[0008] The technical solution of the present invention is: A grinding disc and a rotor valve assembly. The rotor valve includes a rotor body and rotor liners respectively connected to the upper and lower ends of the rotor body. The grinding disc includes an upper grinding disc and a lower grinding disc, both the upper grinding disc and the lower grinding disc are made of wear-resistant metal. The rotor liner includes a liner plate and a rubber disc connected to each other. The rubber discs of the two rotor liners are used for sliding seals with the upper grinding disc and the lower grinding disc respectively. This technical solution is based on a large number of on-site investigations and in-depth analyses, and creatively discovers that there are difficult-to-detect problems in both existing dry spraying machines and wet spraying machines - since hard steel liners are used at the upper and lower ends of the rotor valve, and a soft rubber sealing plate is used for sliding seal cooperation with the hard steel liners. Since the rubber sealing plate is a fixed part and the hard steel liner is a rotating part, the wear at the feed inlet and discharge outlet of the rubber sealing plate is relatively serious and occurs first. Then the material will enter between the steel liner and the rubber sealing plate through the worn area, which will exacerbate the wear. Although the newly proposed composite grinding disc has excellent wear resistance, as long as the feed inlet and discharge outlet are worn, the wear degree between the steel liner of the composite grinding disc and the steel liner of the rotor valve will be further aggravated.

[0009] Based on the creative discovery of the above problems, the technical solution of this application adopts a subversive structural innovation. The upper grinding disc and the lower grinding disc are designed as wear-resistant metal structural parts, which can effectively avoid the wear at the feed inlet of the upper grinding disc and the discharge outlet of the lower grinding disc. Further, the steel liners at the upper and lower ends of the rotor valve are designed as composite rotor liners, so that the rubber discs in the rotor liners are used for sliding seals with the upper grinding disc or the lower grinding disc. Since the rotor valve is a rotating part, during the material conveying process, the rotor liners at the upper and lower ends of the rotor valve rotate at a uniform speed. The rubber discs in the rotor liners at the upper end of the rotor valve can uniformly contact the feed inlet at various places, and the rubber discs in the rotor liners at the lower end of the rotor valve can uniformly contact the discharge outlet at various places, effectively avoiding the eccentric wear phenomenon and realizing the uniform wear of the rubber discs. Even if fine-grained materials enter between the rubber disc and the corresponding grinding disc from the feed inlet or the discharge outlet, the uniform wear of the rubber disc can also be achieved.

[0010] On the basis of the above technical solution, as a preferred technical solution of the grinding disc and rotor valve assembly, the liner plate includes a liner disc and a wear-resistant liner ring provided on the liner disc for material flow. The rubber disc is arranged on one side of the liner disc facing the friction surface and wraps around the outside of the wear-resistant liner ring. The outer end face of the rubber disc protrudes from the outer end face of the wear-resistant liner ring.

[0011] This technical solution is a further upgrade of the above technical solution. By means of a wear-resistant lining ring, a spraying cavity is constructed on the rotor lining plate. The shape and distribution of the spraying cavity are the same as those in the prior art, which are several material passing ports that intermittently connect the feeding port and the inner cavity of the rotor body, and several material passing ports that intermittently connect the inner cavity of the rotor body and the discharging port. The use of a rubber disc is to enhance the wear resistance of the rotor lining plate in the radial direction, while the use of a wear-resistant lining ring can not only improve the wear resistance of the rotor lining plate in the axial direction, but also jointly support and fix the rubber disc with the lining disc. At the same time, compared with the above technical solution, after setting the wear-resistant lining ring, the spraying cavity for intermittent material flow is not directly opened on the rubber disc, avoiding the wear of the rubber disc in the axial direction. As for the material of the lining disc, any rigid structure can be selected, which can be a wear-resistant structure or an ordinary structure, and preferably a wear-resistant structure. As for the specific connection method between the lining disc and the wear-resistant lining ring, there are various options, such as welding, bonding, clamping, interference connection, etc., and preferably bonding, clamping and other detachable connection methods are adopted.

[0012] On the basis of the above technical solution, as a preferred technical solution of the grinding disc and the rotor valve assembly, the lining disc and / or the lining ring are made of wear-resistant metal material. This technical solution is a further upgrade of the above technical solution, providing three alternative implementation modes, that is, the lining disc is made of wear-resistant metal material, the lining ring is made of wear-resistant metal material, and both the lining disc and the lining ring are made of wear-resistant metal material.

[0013] On the basis of the above technical solution, as a preferred technical solution of the grinding disc and the rotor valve assembly, the wear-resistant metal material is high manganese steel or wear-resistant cast iron or wear-resistant alloy steel or gradient functional composite material or austempered ductile iron. This technical solution is a further upgrade of the above technical solution, providing various alternative implementation modes, that is, the upper grinding disc, the lower grinding disc, the lining disc and the lining ring can all be made of any one of high manganese steel, wear-resistant cast iron, wear-resistant alloy steel, gradient functional composite material, austempered ductile iron.

[0014] On the basis of the above technical solution, as a preferred technical solution of the grinding disc and the rotor valve assembly, the wear-resistant lining ring is detachably connected to the lining disc. As described above, this technical solution is a preferred implementation mode. Those skilled in the art can, under the guidance of this technical solution, choose to connect the wear-resistant lining ring and the lining disc by means of bonding, clamping, etc., so as to facilitate assembly and subsequent maintenance and replacement.

[0015] On the basis of the above technical solution, as a preferred technical solution of the grinding disc and the rotor valve assembly, the rubber disc is detachably connected to the lining disc. As described above, this technical solution is a preferred implementation mode. Those skilled in the art can, under the guidance of this technical solution, choose to connect the rubber disc and the lining disc by means of bonding, clamping, etc., so as to facilitate assembly and subsequent maintenance and replacement.

[0016] Based on the above technical solutions, as a preferred technical solution of the grinding disc and the rotor valve assembly, with the center of the upper grinding disc as the origin, the feed inlet, the compressed air inlet, the pressure relief port, and the spare pressure relief port on the upper grinding disc are respectively located in four quadrants.

[0017] Based on the above technical solutions, as a preferred technical solution of the grinding disc and the rotor valve assembly, the discharge port on the lower grinding disc and the feed inlet are located in the same quadrant.

[0018] Based on the above technical solutions, as a preferred technical solution of the grinding disc and the rotor valve assembly, a lubrication channel leading to the sliding seal is provided on the upper grinding disc and / or the lower grinding disc.

[0019] A dry spraying machine includes the grinding disc and the rotor valve assembly according to any one of the above technical solutions.

[0020] A wet spraying machine includes the grinding disc and the rotor valve assembly according to any one of the above technical solutions.

[0021] Compared with the prior art, for the grinding disc and the rotor valve assembly, the dry spraying machine, and the wet spraying machine proposed by the present invention, the upper grinding disc and the lower grinding disc are designed as wear-resistant metal structural parts, which can effectively avoid the wear at the feed inlet of the upper grinding disc and the discharge port of the lower grinding disc; further, the steel lining plates at the upper and lower ends of the rotor valve are designed as composite rotor linings, so that the rubber discs in the rotor linings are in sliding seal with the upper grinding disc or the lower grinding disc. Since the rotor valve is a rotating part, during the material conveying process, the rotor linings at the upper and lower ends of the rotor valve rotate at a constant speed. The rubber discs in the rotor linings at the upper end of the rotor valve can uniformly contact the feed inlet at various places, and the rubber discs in the rotor linings at the lower end of the rotor valve can uniformly contact the discharge port at various places, effectively alleviating the eccentric wear phenomenon and achieving uniform wear of the rubber discs; even if fine particles of materials enter between the rubber discs and the corresponding grinding discs from the feed inlet or the discharge port, uniform wear of the rubber discs can still be achieved, effectively alleviating the eccentric wear phenomenon of the rubber part during equipment operation, greatly improving the wear resistance, compressive resistance, high temperature resistance, and corrosion resistance of the grinding disc and the rotor valve, and greatly increasing the service life compared with other grinding disc and rotor valve structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic structural diagram of the rotor lining; Figure 2 ForFigure 1 Schematic structural diagram of the middle liner Figure 3 Schematic structural diagram of the upper grinding disc Figure 4 Schematic structural diagram of the lower grinding disc

[0024] Explanation of the reference numerals in the drawings Rotor liner 1, rubber disc 1-2, liner 1-3, liner ring 1-4, liner disc 1-5, bolt hole 1-6 Upper grinding disc 2, feed inlet 2-2, spare pressure relief port 2-3, grease injection hole 1 2-4, grease discharge hole 1 2-5, pressure relief port 2-6, compressed air inlet 2-7, positioning hole 1 2-8, bolt hole 1 2-9 Lower grinding disc 3, discharge outlet 3-2, positioning hole 2 3-3, bolt hole 2 3-4, grease injection hole 2 3-5, grease discharge hole 2 3-6 Specific implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the core concept of the present invention and the following embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] These embodiments are provided in this application to make this application thorough and complete, and to fully convey the scope of this application to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of the components and steps described in these embodiments, the components of the materials, the numerical expressions and values should be construed as merely exemplary, rather than as limitations.

[0027] It should be noted that in the description of this application, unless otherwise stated, the meaning of "several" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", "axial", "radial", etc. The indicated orientation or positional relationship is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to this application. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0028] In addition, the "first", "second" and similar terms used in this application do not denote any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean strictly vertical, but within the allowable error range. "Parallel" does not mean strictly parallel, but within the allowable error range. Similar terms such as "include" or "comprise" mean that the elements before this word cover the elements listed after this word, and do not exclude the possibility of also covering other elements.

[0029] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "install", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, an intermediate device may or may not exist between the specific device and the first device or the second device.

[0030] All terms used in this application have the same meanings as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as, should be interpreted to have meanings consistent with their meanings in the context of the related art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0031] Technologies, methods and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and devices should be regarded as part of the specification.

[0032] An object of the present invention is to provide a grinding disc and a rotor valve assembly capable of wear resistance, so as to achieve uniform wear of the grinding disc and the rotor valve.

[0033] To achieve the above object, as Figures 1 to 4 shown, the present invention includes: an upper grinding disc, a rotor valve and a lower grinding disc; the upper grinding disc 2 is provided with a feed port 2-2 and a compressed air inlet 2-7, and the lower grinding disc 3 is provided with a discharge port 2-3; the rotor valve includes a rotor body and rotor liners 1 respectively connected to the upper and lower ends of the rotor body. The rotor liners 1 are provided with injection cavities corresponding to the rotor body. The shapes and distributions of the injection cavities are the same as those in the prior art, and are a plurality of material through ports that intermittently communicate the feed port 2-2 and the inner cavity of the rotor body, and a plurality of material through ports that intermittently communicate the inner cavity of the rotor body and the discharge port 3-2. This part of the technical features is the same as that in the prior art.

[0034] The uniqueness of the present invention lies in that through a large number of on-site investigations, tests and in-depth analyses, it is found that there is a serious uneven wear phenomenon on the grinding disc. The wear at the feed inlet 2-2 of the upper grinding disc 2 and the discharge outlet 3-2 of the lower grinding disc 3 is the most serious, and the wear of the rest part is relatively light. Therefore, the materials of the upper grinding disc 2 and the lower grinding disc 3 are set as wear-resistant metal materials, effectively avoiding the wear here; the rotor liner 1 is the driving part, and the rotor liner 1 includes a liner 1-3 and a rubber disc 1-2 connected to each other. The rubber discs 1-2 of the two rotor liners 1 are used for sliding seals with the upper grinding disc 2 and the lower grinding disc 3 respectively. During the material conveying process, the rotor valve rotates at a constant speed, and the injection chambers of the rotor liner 1 uniformly contact the feed inlet 2-2 / discharge outlet 3-2, effectively avoiding the uneven wear phenomenon and realizing the uniform wear of the rubber part.

[0035] Preferably, grease injection holes are provided on the sides of the upper grinding disc 2 and the lower grinding disc 3 of the present invention, which are communicated with the grease outlet holes on the friction working surfaces of the grinding discs. Grease can be injected onto the contact surfaces between the grinding discs and the rotor liner 1 to form a lubricating seal ring, which has the effect of lubricating and cooling during the operation process, preventing dry grinding and other phenomena between the grinding discs and the rotor valve, and having a certain protective effect on the grinding discs and the rotor valve.

[0036] Preferably, a pressure relief port 2-6 and a spare pressure relief port 2-3 are further provided on the upper grinding disc. Preferably, the compressed air inlet 2-7, the pressure relief port 2-6, the spare pressure relief port 2-3 and the feed inlet 2-2 are respectively located in four quadrants. Preferably, the inner wall of the injection chamber of the rotor liner 1 is composed of a steel liner ring, the steel liner ring is bonded to the steel liner disc, a fixed flange integrally formed is provided at the center of the steel liner disc and constitutes the bottom of the rotor valve, and the rubber disc 1-2 wraps the steel liner disc and constitutes the upper part of the rotor valve.

[0037] Thus, according to the present invention, the wear of the upper grinding disc and the lower grinding disc can be avoided and the wear of the rubber part of the rotor valve can be reduced. As a result, the uneven wear phenomenon of the rubber part can be effectively avoided according to the uniform rotation of the rotor valve, and the service life of the grinding disc and the rotor valve can be improved.

[0038] The specific embodiments are as follows: A grinding disc and rotor valve assembly, as Figures 1 to 4 shown, the rotor valve includes a rotor body and rotor liners 1 respectively connected to the upper and lower ends of the rotor body. The grinding disc includes an upper grinding disc 2 and a lower grinding disc 3. The above structure is the same as the prior art, that is, the upper grinding disc 2 has a feed inlet 2-2 and a compressed air inlet 2-7, the lower grinding disc 3 has a discharge outlet 3-2, and the rotor liner 1 has the above-mentioned injection chamber.

[0039] It should be noted that both the upper grinding disc 2 and the lower grinding disc 3 are made of wear-resistant metal materials. The rotor liner 1 includes a liner 1-3 and a rubber disc 1-2 that are connected to each other. The rubber discs 1-2 of the two rotor liners 1 are used for sliding seals with the upper grinding disc 2 and the lower grinding disc 3 respectively. Based on a large number of on-site investigations and in-depth analyses, this embodiment creatively discovers that there are difficult-to-detect problems in both existing dry spraying machines and wet spraying machines. Since hard steel liners are used at both the upper and lower ends of the rotor valve, and the soft rubber sealing plates are used for sliding seal cooperation with the hard steel liners. Since the rubber sealing plates are fixed parts and the hard steel liners are rotating parts, severe wear occurs at the feeding port and the discharging port of the rubber sealing plates and wear occurs first. Then the material will enter between the steel liner and the rubber sealing plate through the worn area, which will exacerbate the wear. Although the newly proposed composite grinding disc has excellent anti-wear performance, as long as wear occurs at the feeding port and the discharging port, the wear degree between the steel liner of the composite grinding disc and the steel liner of the rotor valve will be further aggravated.

[0040] Based on the creative discovery of the above problems, the embodiment of this application adopts a subversive structural innovation. The upper grinding disc 2 and the lower grinding disc 3 are designed as wear-resistant metal structural parts, which can effectively avoid the wear at the feeding port 2-2 of the upper grinding disc 2 and the discharging port 3-2 of the lower grinding disc 3. Further, the steel liners at both the upper and lower ends of the rotor valve are designed as composite rotor liners, so that the rubber disc 1-2 in the rotor liner 1 is in sliding seal with the upper grinding disc 2 or the lower grinding disc 3. Since the rotor valve is a rotating part, during the material conveying process, the rotor liners 1 at both the upper and lower ends of the rotor valve rotate at a constant speed. The rubber disc 1-2 in the rotor liner 1 at the upper end of the rotor valve can uniformly contact the feeding port 2-2 at various places, and the rubber disc 1-2 in the rotor liner 1 at the lower end of the rotor valve can uniformly contact the discharging port 3-2 at various places, effectively avoiding the eccentric wear phenomenon and realizing the uniform wear of the rubber disc 1-2. Even if fine particles of materials enter between the rubber disc 1-2 and the corresponding grinding disc from the feeding port 2-2 or the discharging port 3-2, the uniform wear of the rubber disc 1-2 can also be achieved.

[0041] On the basis of the above embodiment, as a preferred embodiment of the grinding disc and the rotor valve assembly, the liner 1-3 includes a liner disc 1-5 and a wear-resistant liner ring 1-4 provided on the liner disc 1-5 for material flow. The rubber disc 1-2 is arranged on one side of the liner disc 1-5 facing the friction surface and wraps around the outside of the wear-resistant liner ring 1-4. The outer end face of the rubber disc 1-2 protrudes from the outer end face of the wear-resistant liner ring 1-4.

[0042] This embodiment is a further upgrade of the above embodiment. The spraying cavities on the rotor liner 1 are constructed by wear-resistant lining rings 1-4. The shape and distribution of the spraying cavities are the same as those in the prior art. They are several material passing ports that intermittently connect the feeding port 2-2 and the inner cavity of the rotor, and several material passing ports that intermittently connect the inner cavity of the rotor and the discharging port 3-2. The use of the rubber disc 1-2 improves the wear resistance of the rotor liner 1 in the radial direction, while the use of the wear-resistant lining ring 1-4 can not only improve the wear resistance of the rotor liner 1 in the axial direction, but also support and fix the rubber disc 1-2 together with the lining disc 1-5. At the same time, compared with the above embodiment, after setting the wear-resistant lining ring 1-4, the spraying cavities for intermittent material flow are not directly opened on the rubber disc 1-2, avoiding wear of the rubber disc 1-2 in the axial direction.

[0043] As for the material of the lining disc 1-5, any rigid structure can be selected, which can be a wear-resistant structure or an ordinary structure. It is preferably a wear-resistant structure. As for the specific connection method between the lining disc 1-5 and the wear-resistant lining ring 1-4, there are many choices, such as welding, bonding, clamping, interference connection, etc. Bonding and clamping, etc., which are convenient for disassembly, are preferably used.

[0044] On the basis of the above embodiment, as a preferred embodiment of the grinding disc and the rotor valve assembly, the lining disc 1-5 and / or the lining ring 1-4 are made of wear-resistant metal. This embodiment is a further upgrade of the above embodiment, providing three alternative implementation manners, that is, the lining disc 1-5 is made of wear-resistant metal, the lining ring 1-4 is made of wear-resistant metal, and both the lining disc 1-5 and the lining ring 1-4 are made of wear-resistant metal.

[0045] On the basis of the above embodiment, as a preferred embodiment of the grinding disc and the rotor valve assembly, the wear-resistant metal material is high manganese steel or wear-resistant cast iron or wear-resistant alloy steel or gradient functional composite material or austempered ductile iron. This embodiment is a further upgrade of the above embodiment, providing a variety of alternative implementation manners, that is, the upper grinding disc 2, the lower grinding disc 3, the lining disc 1-5 and the lining ring 1-4 can all be made of any one of high manganese steel, wear-resistant cast iron, wear-resistant alloy steel, gradient functional composite material, and austempered ductile iron.

[0046] It should be particularly noted that the following exemplary descriptions of the above various wear-resistant metal materials are given in this embodiment. Those skilled in the art can select the corresponding materials suitable for practical use according to actual needs under the technical guidance of this embodiment.

[0047] The representative material in high manganese steel is: ZGMn13, which can be rapidly hardened on the surface (the hardness can reach above HB550) under severe impact or high stress, and the core maintains high toughness, forming a "hard outside and tough inside" structure, with excellent anti-impact wear resistance.

[0048] Wear-resistant cast iron: High-chromium cast iron: containing chromium ≥ 10%, forming high-hardness chromium carbide hard phases, with outstanding wear resistance and corrosion resistance, suitable for mining machinery, cement equipment, etc.; High-nickel cast iron: improving toughness and high-temperature resistance by adding nickel, suitable for high-temperature wear-resistant components in metallurgical equipment; High-silicon cast iron: high silicon content endows it with corrosion resistance and high-temperature oxidation resistance, used in chemical equipment; White cast iron: Ordinary white cast iron has high hardness but high brittleness. The improved chromium alloy white cast iron improves wear resistance and high-temperature oxidation resistance by adding chromium elements.

[0049] Wear-resistant alloy steels are divided into low, medium, and high alloy steels. By adjusting the composition (such as chromium, nickel, molybdenum) and heat treatment process, the hardness (HRC52 - 58) and toughness (ak = 15 - 30 J / cm²) are balanced, suitable for components that require both wear resistance and fatigue resistance.

[0050] Functionally Graded Materials (FGM) are composite / gradient materials. Functionally Graded Materials (FGM) are heterogeneous materials prepared by a composite process from two or more materials, and their composition, structure, and properties change continuously or quasi-continuously along a certain direction (such as thickness, length). Its representative materials include tungsten carbide infiltration (WCSP) and chromium carbide composite materials (Cr 2 C 3 +Q235). Tungsten carbide infiltration (WCSP): Combining tungsten carbide with a steel matrix through ion implantation technology, with a high-hardness surface layer (tungsten carbide) and a high-toughness core, suitable for extreme wear environments; Chromium carbide composite materials (Cr 2 C 3 +Q235): Combining high wear resistance and the strength of the matrix material.

[0051] Austempering ductile iron obtains an austenite + bainite structure through austempering treatment, with high strength, good toughness, extremely high strength and wear resistance, good impact resistance and fatigue resistance, achieving a perfect combination of hardness and toughness, and better wear resistance than ordinary ductile iron.

[0052] On the basis of the above embodiments, as a preferred embodiment of the grinding disc and rotor valve assembly, the wear-resistant lining ring 1 - 4 is detachably connected to the lining disc 1 - 5. As described above, this embodiment is a preferred implementation manner. Those skilled in the art can, under the guidance of this embodiment, choose to connect the wear-resistant lining ring 1 - 4 and the lining disc 1 - 5 by means such as bonding and clamping, which is convenient for assembly and later maintenance and replacement.

[0053] On the basis of the above embodiments, as a preferred embodiment of the grinding disc and the rotor valve assembly, the rubber disc 1-2 is detachably connected to the lining disc 1-5. As described above, this embodiment is a preferred implementation manner. Those skilled in the art can, under the guidance of this embodiment, choose to connect the rubber disc 1-2 and the lining disc 1-5 by means such as bonding and clamping, which is convenient for assembly and later maintenance and replacement.

[0054] On the basis of the above embodiments, as a preferred embodiment of the grinding disc and the rotor valve assembly, with the center of the upper grinding disc 2 as the origin, the feed port 2-2, the compressed air inlet 2-7, the pressure relief port 2-6, and the spare pressure relief port 2-3 on the upper grinding disc 2 are respectively located in four quadrants.

[0055] On the basis of the above embodiments, as a preferred embodiment of the grinding disc and the rotor valve assembly, the discharge port 3-2 on the lower grinding disc 3 and the feed port 2-2 are located in the same quadrant, which is convenient for efficient spraying of materials and can reduce impact and friction at the same time.

[0056] On the basis of the above embodiments, as a preferred embodiment of the grinding disc and the rotor valve assembly, a lubrication channel leading to the sliding seal is provided on the upper grinding disc 2 and / or the lower grinding disc 3. This embodiment gives three alternative implementation manners, that is, a lubrication channel leading to the sliding seal is provided on the upper grinding disc 2, a lubrication channel leading to the sliding seal is provided on the lower grinding disc 3, and lubrication channels leading to the sliding seal are provided on both the upper grinding disc 2 and the lower grinding disc 3.

[0057] Specifically, as shown in Figure 3 and Figure 4 , an oil injection hole one 2-4 is provided on the outer peripheral surface of the upper grinding disc 2, and an oil discharge hole one 2-5 is provided on the friction surface of the upper grinding disc 2. The oil injection hole one 2-4 and the oil discharge hole one 2-5 are in communication with each other. An oil injection hole two 3-5 is provided on the outer peripheral surface of the lower grinding disc 3, and an oil discharge hole two 3-5 is provided on the friction surface of the lower grinding disc 3. The oil injection hole two 3-5 and the oil discharge hole two 3-5 are in communication with each other.

[0058] Preferably, a plurality of oil injection holes one 2-4 and oil discharge holes one 2-5 can be provided. It can be that one oil injection hole one 2-4 is in communication with one oil discharge hole one 2-5, or a plurality of oil injection holes one 2-4 are in communication with one oil discharge hole one 2-5, or one oil injection hole one 2-4 is in communication with a plurality of oil discharge holes one 2-5, or a plurality of oil injection holes one 2-4 are in communication with a plurality of oil discharge holes one 2-5. Similarly, the oil injection hole two 3-5 and the oil discharge hole two 3-5 can also adopt the above preferred layout and connection relationship.

[0059] Preferably, the distance from the grease outlet hole 2-5 to the center of the upper grinding disc 2 is greater than the maximum distance from the feed inlet 2-2, the standby pressure relief port 2-3, the pressure relief port 2-6, and the compressed air inlet 2-7 to the center of the upper grinding disc 2; or, the distance from the grease outlet hole 2-5 to the center of the upper grinding disc 2 is less than the minimum distance from the feed inlet 2-2, the standby pressure relief port 2-3, the pressure relief port 2-6, and the compressed air inlet 2-7 to the center of the upper grinding disc 2. Preferably, the grease outlet hole 2-5 with the above two spatial layouts is arranged simultaneously. Similarly, the above preferred layout and connection relationship can also be adopted between the grease injection hole 3-5 and the grease outlet hole 3-5.

[0060] As a preferred embodiment of the grinding disc and the rotor valve assembly, as Figures 1 to 4 shown, it includes a rotor lining 1, an upper grinding disc 2, and a lower grinding disc 3. The rotor lining 1 is made of composite materials, which are inlaid and combined with materials such as wear-resistant metal and rubber, and has characteristics such as wear resistance, high temperature resistance, and pressure resistance; both the upper grinding disc 2 and the lower grinding disc 3 are made of wear-resistant metal materials, which avoid frequent damage of the pea gravel pump during operation due to wear, and the sizes and thicknesses of the upper grinding disc 2 and the lower grinding disc 3 are basically the same.

[0061] As Figure 1 shown, the rotor lining 1 includes a rubber disc 1-2 and a lining 1-3. The rubber disc 1-2 can wrap the lining 1-3, and its fixing method can adopt chemical adhesive connection, etc.; Figure 2 What is shown is the lining 1-3, which is made by bonding the steel lining ring 1-4 and the lining disc 1-5 in the injection cavity part. Among them, a shaft through hole is reserved in the center of the lining disc 1-5 and bolt holes 1-6 for connecting with the rotor body are processed, and the bolt holes 1-6 are evenly distributed.

[0062] As Figure 3 and Figure 4 shown, the upper grinding disc 2 is provided with a feed inlet 2-2, and the lower grinding disc 3 is provided with a discharge outlet 3-2. Grease injection holes are arranged inside both the upper grinding disc 2 / the lower grinding disc 3, and the grease injection holes are communicated with the grease outlet holes arranged on the working surface of the upper grinding disc 2 / the lower grinding disc 3: the grease injection holes and the grease outlet holes form a lubrication channel, and the lubricating grease can enter the working surface of the upper grinding disc / the lower grinding disc through this lubrication channel for lubrication and cooling to prevent dry grinding of the grinding disc, etc., and have a certain protective effect on the grinding disc and the rotor lining 1. During the actual construction process, the setting of the above lubrication channels in the upper grinding disc 2 and the lower grinding disc 3 is not limited to two lubrication channels, and a single lubrication channel or multiple lubrication channels can be set, or no lubrication channel can be set. The design of the lubrication channel can be carried out according to the actual working conditions on site.

[0063] The upper grinding disc 2 and the lower grinding disc 3 are respectively provided with a first positioning hole 2-8 and a second positioning hole 3-3, ensuring accurate positioning of the upper grinding disc 2 and the lower grinding disc 3, and fixing the grinding discs to prevent torsion. The number and positions of the first positioning hole 2-8 and the second positioning hole 3-3 can be determined according to the actual working conditions on site, not limited to those shown in the figure.

[0064] The upper grinding disc 2 is further provided with a compressed air inlet 2-7, a pressure relief port 2-6 and a spare pressure relief port 2-3; a sealing groove is provided at the compressed air inlet 2-7; preferably, the compressed air inlet 2-7, the pressure relief port 2-6, the spare pressure relief port 2-3 and the feed port 2-2 are respectively located in four quadrants. Among them, the feed port 2-2 of the upper grinding disc 2 and the discharge port 3-2 of the lower grinding disc 3 are in the same quadrant.

[0065] During use, the upper grinding disc 2 and the lower grinding disc 3 are fixed by the first bolt hole 2-9 provided on the upper grinding disc 2, the second bolt hole 3-4 provided on the lower grinding disc 3, the first positioning hole 2-8 and the second positioning hole 3-3, and the rotor lining plate 1 is connected to the transmission part through the bolt hole 1-6. Pressurization is carried out at the compressed air inlet 2-7, and the compressed air drives materials such as pea gravel or concrete to form relative movement with the grinding disc, thereby generating a grinding effect. The grinding discs are all made of wear-resistant metal structures, avoiding wear caused by the relative movement of material particles. In addition, a large number of on-site investigations show that the wear at the feed port 2-2 and the discharge port 3-2 is the most serious. By replacing the grinding discs with wear-resistant metal materials, the phenomenon of eccentric wear is avoided. The rotor lining plate 1 is a moving part during operation and rotates at a constant speed, and each rubber disc 1-2 is evenly in contact with the feed port 2-2 / discharge port 3-2, reducing the eccentric wear of the pea gravel on the rubber disc 1-2.

[0066] A dry spraying machine includes a frame and a blanking mechanism, and further includes the grinding disc and the rotor valve assembly according to any one of the above embodiments. The lower end surface of the rotor valve is arranged on the frame through the lower grinding disc 3, and the upper end surface of the rotor valve is connected to the blanking mechanism through the upper grinding disc 2.

[0067] A wet spraying machine includes a frame and a blanking mechanism, and includes the grinding disc and the rotor valve assembly according to any one of the above embodiments. The lower end surface of the rotor valve is arranged on the frame through the lower grinding disc 3, and the upper end surface of the rotor valve is connected to the blanking mechanism through the upper grinding disc 2.

[0068] The details not elaborated in the present invention are all conventional technical means well known to those skilled in the art.

[0069] The above content shows and describes the basic principles, main features and the beneficial effects of the present invention. The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A grinding disc and rotor valve assembly, the rotor valve comprising a rotor body and rotor liners (1) respectively connected to the upper and lower ends of the rotor body, the grinding disc comprising an upper grinding disc (2) and a lower grinding disc (3), characterized in that: The upper grinding disc (2) and the lower grinding disc (3) are both made of wear-resistant metal. The rotor lining (1) comprises a lining (1-3) and a rubber disc (1-2) which are connected to each other. The rubber discs (1-2) of the two rotor linings (1) are used for sliding sealing with the upper grinding disc (2) and the lower grinding disc (3) respectively.

2. The grinding disc and rotor valve assembly according to claim 1, characterized in that: The lining plate (1-3) comprises a lining disc (1-5) and a wear-resistant lining ring (1-4) arranged on the lining disc (1-5) for material circulation; the rubber disc (1-2) is arranged on a side of the lining disc (1-5) facing the friction surface and wrapped around the outside of the wear-resistant lining ring (1-4); the outer end surface of the rubber disc (1-2) protrudes from the outer end surface of the wear-resistant lining ring (1-4).

3. The grinding disc and rotor valve assembly according to claim 2, characterized in that: The lining disc (1-5) and / or the lining ring (1-4) are made of wear-resistant metal material.

4. The grinding disc and rotor valve assembly according to claim 2 or 3, characterized in that: The wear-resistant metal material is high manganese steel or wear-resistant cast iron or wear-resistant alloy steel or gradient functional composite material or austempered ductile iron.

5. The grinding disc and rotor valve assembly according to claim 4, characterized in that: The wear-resistant liner ring (1-4) is detachably connected to the liner disc (1-5).

6. The grinding disc and rotor valve assembly according to any one of claims 1 to 3 and 5, characterized in that: The rubber disc (1-2) and the lining disc (1-5) are detachably connected.

7. The grinding disc and rotor valve assembly according to claim 6, characterized in that: The center of the upper grinding disc (2) is taken as the origin, and the feed port (2-2), the compressed air inlet (2-7), the pressure relief port (2-6), and the spare pressure relief port (2-3) on the upper grinding disc (2) are respectively located in four quadrants.

8. The grinding disc and rotor valve assembly according to claim 7, characterized in that: The discharge port (3-2) on the lower grinding disc (3) and the feed port (2-2) are located in the same quadrant.

9. The grinding disc and rotor valve assembly according to any one of claims 1-3, 5, 7-8, characterized in that: The upper grinding disc (2) and / or the lower grinding disc (3) are provided with a lubrication channel leading to the sliding seal.

10. A dry spraying machine, characterized in that: It comprises the grinding disc and rotor valve assembly as described in any one of claims 1-9.

11. A wet spraying machine, characterized in that: It comprises the grinding disc and rotor valve assembly as described in any one of claims 1-9.

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