A millstone and rotor valve assembly, a dry blaster, a wet blaster

Abstract

The application discloses a mill disc and rotor valve assembly, a dry spraying machine and a wet spraying machine, the rotor valve comprises a rotor body and rotor liners connected to the upper and lower ends of the rotor body respectively, the mill disc comprises an upper mill disc and a lower mill disc, the upper mill disc and the lower mill disc are made of wear-resistant metal material, the rotor liner comprises a liner and a rubber disc connected to each other, and the rubber discs of the two rotor liners are used for sliding sealing with the upper mill disc and the lower mill disc respectively. The dry spraying machine and the wet spraying machine both comprise the mill disc and rotor valve assembly. The upper mill disc and the lower mill disc are designed as wear-resistant metal structural parts, so that the wear of the feed inlet of the upper mill disc and the discharge outlet of the lower mill disc is effectively avoided; further, the steel liners at the upper and lower ends of the rotor valve are designed as composite rotor liners, the rubber disc in the rotor liner is sliding sealed with the upper mill disc or the lower mill disc, the rubber disc in the rotor liner can be uniformly contacted with the feed inlet / discharge outlet by the uniform rotation of the rotor liners at the upper and lower ends of the rotor valve, and the eccentric wear phenomenon is effectively relieved.

Description

Technical Field

[0001] This invention relates to the technical field of rotor valves for spraying devices, and in particular to a grinding disc and rotor valve assembly, a dry spraying machine, and a wet spraying machine. Background Technology

[0002] In shield tunneling using a TBM, backfilling of the tunnel wall is a crucial step in ensuring tunnel construction safety. Currently, the main materials for backfilling are gravel and sand. During construction, gravel pumps are frequently used for material transport. Commonly used gravel jet pumps use a rubber grinding disc and a rotor valve to form a jetting chamber for material transport. The rubber grinding disc, also known as a rubber sealing plate, is used for feeding and for sliding sealing with the rotor valve. The rotational friction between the rubber grinding disc and the steel liner of the rotor valve can lead to localized dry grinding, uneven grinding, and scraping during operation, which can easily cause friction damage, resulting in increased costs and delays in construction.

[0003] In recent years, research on reducing wear on rubber grinding discs has gradually emerged, mostly through adding wear-resistant materials or improving the lubrication effect of grease. For example, the applicant's prior invention patent application, published on May 5, 2023, with publication number CN 116061099 A, specifically discloses a grinding disc structure and manufacturing process for a pebble pump, including an upper grinding disc and a lower grinding disc. The upper grinding disc has a feed inlet, and the lower grinding disc has a discharge outlet. Both the upper and / or lower grinding discs have grease injection holes inside, which are connected to grease lubrication holes located on the working surfaces of the upper and / or lower grinding discs. Both the upper and lower grinding discs are composite grinding discs, preferably composite grinding discs made of steel plate, rubber, and ceramics. The upper and lower grinding discs are inlaid with materials such as steel plate, polyurethane rubber, and ceramics, which can effectively solve problems such as grinding disc wear and burn-out that occur during the operation of pebble pumps, 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 also becomes more complicated.

[0004] For example, the applicant's prior utility model patent application, with an authorization announcement date of December 8, 2023, and authorization announcement number CN 220151535 U, specifically discloses a rotary friction pair lubrication energy-saving system and a pebble pump. The system includes a rotor and a stator. The rotor is connected to a drive unit with a frequency converter. The drive unit drives the rotor to rotate and cooperates with the stator to form a rotary friction pair. The stator is equipped with a lubricating oil filling system, which is electrically connected to the output of a controller, and the frequency converter is electrically connected to the input of the controller. This rotary friction pair lubrication energy-saving system can effectively monitor and provide feedback on the amount of grease used at the rotary friction pair location, achieving intermittent grease injection control, effectively reducing grease usage. While ensuring the service life of the rotary friction pair, it reduces the amount of lubricating grease used and the start-up time of the lubricating grease pump, thereby achieving energy saving and environmental protection, and improving the economic and social benefits of the product.

[0005] In summary, existing friction reduction technologies for injection chambers employ composite grinding discs or modified lubrication channels. While these methods improve wear resistance at the feed inlet, the structure and manufacturing process of the composite grinding disc become complex, and its wear resistance is limited. Furthermore, the friction fit between the steel liner of the rotor valve and the steel liner of the composite grinding disc is a rigid-to-rigid-structure friction fit. When wear occurs at the feed inlet of the composite grinding disc, since the feed inlet is stationary and the rotor valve continues to rotate, material will enter between the steel liner of the rotor valve and the steel liner of the composite grinding disc, exacerbating wear and causing phenomena such as localized dry grinding, uneven grinding, and scraping, ultimately leading to frictional damage. Therefore, designing a simple and wear-resistant grinding disc and rotor valve is essential.

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

[0007] To address the shortcomings in the aforementioned background technology, this 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 uneven wear of the grinding disc and rotor valve, which have simple structures and production processes.

[0008] The technical solution of this invention is as follows:

[0009] A grinding disc and rotor valve assembly is provided. The rotor valve includes a rotor body and rotor liners connected to the upper and lower ends of the rotor body respectively. The grinding disc includes an upper grinding disc and a lower grinding disc, both of which are made of wear-resistant metal. The rotor liners include liners and rubber discs 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. Based on extensive field research and in-depth analysis, this technical solution creatively identifies a difficult-to-detect problem in existing dry and wet spraying machines: the rotor valve uses rigid steel liners at both ends, while a soft rubber sealing plate slides and seals with the rigid steel liner. Since the rubber sealing plate is a fixed component and the rigid steel liner is a rotating component, wear is more severe and occurs first at the inlet and outlet of the rubber sealing plate. Material then enters between the steel liner and the rubber sealing plate through the worn areas, exacerbating the wear. Although the newly proposed composite grinding disc has excellent wear resistance, wear at its inlet and outlet will further intensify the wear between the steel liner of the composite grinding disc and the steel liner of the rotor valve.

[0010] Based on the inventive discovery of the above problems, the technical solution of this application adopts a disruptive structural innovation, designing the upper and lower grinding discs as wear-resistant metal structural components, which can effectively avoid wear at the feed inlet of the upper grinding disc and the discharge outlet of the lower grinding disc. Furthermore, the steel liner plates at both ends of the rotor valve are designed as composite rotor liners, allowing the rubber discs in the rotor liners to slide and seal with the upper or lower grinding disc. Since the rotor valve is a rotating component, during the material conveying process, the rotor liners at both ends of the rotor valve rotate at a uniform speed. All parts of the rubber discs in the upper rotor liner plate of the rotor valve can make uniform contact with the feed inlet, and all parts of the rubber discs in the lower rotor liner plate of the rotor valve can make uniform contact with the discharge outlet, effectively avoiding uneven wear and achieving uniform wear of the rubber discs. Even if fine particles enter between the rubber disc and the corresponding grinding disc from the feed inlet or discharge outlet, uniform wear of the rubber disc can still be achieved.

[0011] Based on the above technical solutions, as a preferred technical solution for the grinding disc and rotor valve assembly, the liner includes a liner and a wear-resistant liner ring disposed on the liner for material flow. The rubber disc is disposed on the side of the liner facing the friction surface and wraps around the outside of the wear-resistant liner ring, with the outer end face of the rubber disc protruding from the outer end face of the wear-resistant liner ring.

[0012] This technical solution is a further upgrade of the above-mentioned technical solution. It constructs the injection chambers on the rotor liner using wear-resistant bushings. The shape and distribution of the injection chambers are the same as in the prior art, consisting of several intermittent material passages connecting the feed port and the rotor body cavity, and several intermittent material passages connecting the rotor body cavity and the discharge port. While using a rubber disc improves the wear resistance of the rotor liner in the radial direction, using a wear-resistant bushing not only improves the wear resistance of the rotor liner in the axial direction but also supports and fixes the rubber disc together with the liner. Furthermore, compared to the above technical solutions, the use of a wear-resistant bushing avoids directly creating injection chambers for intermittent material flow on the rubber disc, thus preventing axial wear of the rubber disc. The material of the liner can be any rigid structure, either wear-resistant or ordinary, with a wear-resistant structure being preferred. As for the specific connection method between the liner and the wear-resistant bushing, various options are available, such as welding, bonding, snap-fitting, interference fit, etc., with bonding and snap-fitting methods that facilitate disassembly being preferred.

[0013] Based on the above technical solutions, as a preferred technical solution for the grinding disc and rotor valve assembly, the liner and / or bushing are made of wear-resistant metal. This technical solution is a further upgrade of the above technical solutions, providing three optional implementation methods: the liner is made of wear-resistant metal, the bushing is made of wear-resistant metal, or both the liner and the bushing are made of wear-resistant metal.

[0014] Based on the above technical solutions, as a preferred technical solution for the grinding disc and rotor valve assembly, the wear-resistant metal material is high manganese steel, wear-resistant cast iron, wear-resistant alloy steel, graded functional composite material, or austenitic ductile iron. This technical solution is a further upgrade of the above technical solutions, providing multiple optional implementation methods, namely, the upper grinding disc, lower grinding disc, liner, and bushing can all be made of any one of the following materials: high manganese steel, wear-resistant cast iron, wear-resistant alloy steel, graded functional composite material, or austenitic ductile iron.

[0015] Based on the above technical solution, as a preferred technical solution for the grinding disc and rotor valve assembly, the wear-resistant bushing is detachably connected to the bushing. As described above, this technical solution is a preferred embodiment. Those skilled in the art can, under the guidance of this technical solution, choose to connect the wear-resistant bushing and the bushing by means of bonding, snap-fitting, etc., thereby facilitating assembly and subsequent maintenance and replacement.

[0016] Based on the above technical solution, as a preferred technical solution for the grinding disc and rotor valve assembly, the rubber disc and the liner disc are detachably connected. As described above, this technical solution is a preferred embodiment. Those skilled in the art can, under the guidance of this technical solution, choose to connect the rubber disc and the liner disc by means of bonding, snap-fitting, etc., thereby facilitating assembly and subsequent maintenance and replacement.

[0017] Based on the above technical solutions, as a preferred technical solution for the grinding disc and rotor valve assembly, the center of the upper grinding disc is taken as the origin, and the feed port, compressed air inlet, pressure relief port, and spare pressure relief port on the upper grinding disc are located in four quadrants respectively.

[0018] Based on the above technical solutions, as a preferred technical solution for the grinding disc and rotor valve assembly, the discharge port and the feed port on the lower grinding disc are located in the same quadrant.

[0019] Based on the above technical solutions, as a preferred technical solution for the grinding disc and rotor valve assembly, the upper grinding disc and / or the lower grinding disc are provided with lubrication channels leading to the sliding seal.

[0020] A dry spraying machine includes the grinding disc and rotor valve assembly described in any of the above technical solutions.

[0021] A wet spraying machine includes the grinding disc and rotor valve assembly described in any of the above technical solutions.

[0022] Compared with existing technologies, the grinding disc and rotor valve assembly, dry spraying machine, and wet spraying machine proposed in this invention, by designing the upper and lower grinding discs as wear-resistant metal structural components, can effectively avoid wear at the feed inlet of the upper grinding disc and the discharge outlet of the lower grinding disc. Furthermore, by designing the steel liners at both ends of the rotor valve as composite rotor liners, allowing the rubber discs in the rotor liners to slide and seal with the upper or lower grinding disc, since the rotor valve is a rotating component, during the material conveying process, the uniform rotation of the rotor liners at both ends of the rotor valve, along with the rubber discs in the upper rotor liner, ensures a smooth flow. The rubber disc in the rotor liner at the lower end of the rotor valve can make uniform contact with the feed inlet, and all parts of the rubber disc can make uniform contact with the discharge outlet, effectively alleviating uneven wear and achieving uniform wear of the rubber disc. Even if fine particles enter between the rubber disc and the corresponding grinding disc from the feed inlet or discharge outlet, uniform wear of the rubber disc can still be achieved, effectively alleviating uneven wear of the rubber parts during equipment operation. This greatly improves the wear resistance, pressure resistance, high temperature resistance, and corrosion resistance of the grinding disc and rotor valve, resulting in a significantly longer service life compared to other grinding disc and rotor valve structures. Attached Figure Description

[0023] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the rotor liner structure;

[0025] Figure 2 for Figure 1 Schematic diagram of the middle liner plate;

[0026] Figure 3 This is a schematic diagram of the upper grinding disc;

[0027] Figure 4 This is a schematic diagram of the lower grinding disc.

[0028] Explanation of icon numbers:

[0029] Rotor liner 1, rubber disc 1-2, liner 1-3, liner ring 1-4, liner disc 1-5, bolt hole 1-6;

[0030] 2. Upper grinding disc, 2-2. Feed inlet, 2-3. Spare pressure relief port, 2-4. Grease injection hole, 2-5. Grease discharge hole, 2-6. Pressure relief port, 2-7. Compressed air inlet, 2-8. Positioning hole, 2-9. Bolt hole, 2-9.

[0031] Lower grinding disc 3, discharge port 3-2, positioning hole 2 3-3, bolt hole 2 3-4, grease injection hole 2 3-5, grease discharge hole 2 3-6. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the core concept of the present invention and the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0034] It should be noted that, in the description of this application, unless otherwise stated, "several" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "axial," "radial," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] Furthermore, the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0036] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0037] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0038] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0039] One object of the present invention is to provide a wear-resistant grinding disc and rotor valve assembly to achieve uniform wear of the grinding disc and rotor valve.

[0040] To achieve the above objectives, such as Figures 1 to 4 As shown, the present invention comprises: an upper grinding disc, a rotor valve, and a lower grinding disc; the upper grinding disc 2 is provided with a feed inlet 2-2 and a compressed air inlet 2-7, and the lower grinding disc 3 is provided with a discharge outlet 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 having injection chambers corresponding to the rotor body, the shape and distribution of the injection chambers being the same as in the prior art, consisting of several intermittent material passages connecting the feed inlet 2-2 and the inner cavity of the rotor body, and several intermittent material passages connecting the inner cavity of the rotor body and the discharge outlet 3-2. This part of the technical features is the same as in the prior art.

[0041] The unique feature of this invention lies in the discovery, through extensive field research, experimentation, and in-depth analysis, that the grinding discs exhibited severe uneven wear. The wear was most severe at the feed inlet 2-2 of the upper grinding disc 2 and the discharge outlet 3-2 of the lower grinding disc 3, while the wear on other parts was relatively minor. Therefore, the upper grinding disc 2 and the lower grinding disc 3 were made of wear-resistant metal, effectively preventing wear in these areas. The rotor liner 1 is the active component, comprising interconnected liners 1-3 and rubber discs 1-2. 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 uniform speed, and each spray chamber of the rotor liner 1 contacts the feed inlet 2-2 / discharge outlet 3-2 evenly, effectively preventing uneven wear and achieving uniform wear of the rubber parts.

[0042] Preferably, the upper grinding disc 2 and the lower grinding disc 3 of the present invention have grease injection holes on their sides, which are connected to the grease outlet holes on the friction working surface of the grinding disc. Grease can be injected into the contact surface between the grinding disc and the rotor liner 1 to form a lubricating sealing ring. During operation, it plays a role in lubrication and cooling, preventing dry grinding between the grinding disc and the rotor valve, and providing a certain degree of protection for the grinding disc and the rotor valve.

[0043] Preferably, the upper grinding disc is further provided with a pressure relief port 2-6 and a spare pressure relief port 2-3. Preferably, the compressed air inlet 2-7, pressure relief port 2-6, spare pressure relief port 2-3, and feed inlet 2-2 are located in the four quadrants respectively. Preferably, the inner wall of the injection chamber of the rotor liner 1 is composed of steel liner rings, which are bonded to the steel liner disc. The center of the steel liner disc has an integrally formed fixed flange that constitutes the bottom of the rotor valve. The rubber disc 1-2 wraps around the steel liner disc and constitutes the upper part of the rotor valve.

[0044] Therefore, according to the present invention, wear between the upper and lower grinding discs can be avoided and wear on the rubber parts of the rotor valve can be reduced. As a result, uneven wear on the rubber parts can be effectively avoided based on the uniform rotation of the rotor valve, thereby improving the service life of the grinding disc and the rotor valve.

[0045] Specific embodiments are described below:

[0046] A grinding disc and rotor valve assembly, such as Figures 1 to 4 As shown, the rotor valve includes a rotor body and rotor liner plates 1 connected to the upper and lower ends of the rotor body respectively. 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 plate 1 has the above-mentioned injection chamber.

[0047] It is particularly important to note that both the upper grinding disc 2 and the lower grinding disc 3 are made of wear-resistant metal. The rotor liner 1 includes interconnected liners 1-3 and rubber discs 1-2. 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. This embodiment, based on extensive field research and in-depth analysis, creatively discovers a problem that is difficult to detect in existing dry spraying machines and wet spraying machines—because the upper and lower ends of the rotor valve use hard steel liners, while the sliding seal with the hard steel liners is made of soft rubber sealing plates. Since the rubber sealing plates are fixed parts and the hard steel liners are rotating parts, the wear is more severe and occurs first at the inlet and outlet of the rubber sealing plates. Material will then enter between the steel liners and the rubber sealing plates through the wear points, exacerbating the wear. Although the newly proposed composite grinding disc has excellent wear resistance, as long as wear occurs at its inlet and outlet, the wear between the steel liners of the composite grinding disc and the steel liners of the rotor valve will be further aggravated.

[0048] Based on the inventive discovery of the above-mentioned problems, the embodiments of this application adopt a disruptive structural innovation, designing the upper grinding disc 2 and the lower grinding disc 3 as wear-resistant metal structural components, which can effectively avoid 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; furthermore, the steel liner plates at both ends of the rotor valve are designed as composite rotor liners, so that the rubber disc 1-2 in the rotor liner 1 slides and seals with the upper grinding disc 2 or the lower grinding disc 3. Since the rotor valve is a rotating component, during the material conveying process, the upper and lower ends of the rotor valve... The rotor liner 1 rotates at a uniform speed, and the rubber discs 1-2 in the rotor liner 1 at the upper end of the rotor valve can make uniform contact with the feed inlet 2-2. The rubber discs 1-2 in the rotor liner 1 at the lower end of the rotor valve can make uniform contact with the discharge outlet 3-2. This effectively avoids uneven wear and achieves uniform wear of the rubber discs 1-2. Even if fine particles enter between the rubber discs 1-2 and the corresponding grinding disc from the feed inlet 2-2 or the discharge outlet 3-2, uniform wear of the rubber discs 1-2 can still be achieved.

[0049] Based on the above embodiments, as a preferred embodiment of the grinding disc and rotor valve assembly, the liner 1-3 includes a liner 1-5 and a wear-resistant liner ring 1-4 disposed on the liner 1-5 for material flow. The rubber disc 1-2 is disposed on the side of the liner 1-5 facing the friction surface and is wrapped 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.

[0050] This embodiment is a further upgrade of the above embodiment. The spray chamber on the rotor liner 1 is constructed by the wear-resistant bushing 1-4. The shape and distribution of the spray chamber are the same as those in the prior art. It consists of several intermittent material passages connecting the feed port 2-2 and the inner cavity of the rotor body, and several intermittent material passages connecting the inner cavity of the rotor body and the discharge port 3-2. The rubber disc 1-2 is used to improve the wear resistance of the rotor liner 1 in the radial direction, while the wear-resistant bushing 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 bushing 1-5. At the same time, compared with the above embodiment, after setting the wear-resistant bushing 1-4, the spray chamber for intermittent material flow is avoided directly opening on the rubber disc 1-2, thus avoiding wear of the rubber disc 1-2 in the axial direction.

[0051] As for the material of the liner 1-5, any rigid structure can be selected, which can be a wear-resistant structure or an ordinary structure, with a wear-resistant structure being preferred. As for the specific connection method between the liner 1-5 and the wear-resistant bushing 1-4, there are many options, such as welding, bonding, snap-fit, interference fit, etc. Bonding and snap-fit ​​are preferred as they are easy to disassemble.

[0052] Based on the above embodiments, as a preferred embodiment of the grinding disc and rotor valve assembly, the liner 1-5 and / or the bushing 1-4 are made of wear-resistant metal. This embodiment is a further upgrade of the above embodiments, providing three selectable implementation methods: the liner 1-5 is made of wear-resistant metal, the bushing 1-4 is made of wear-resistant metal, or both the liner 1-5 and the bushing 1-4 are made of wear-resistant metal.

[0053] Based on the above embodiments, as a preferred embodiment of the grinding disc and rotor valve assembly, the wear-resistant metal material is high manganese steel, wear-resistant cast iron, wear-resistant alloy steel, graded functional composite material, or austenitic ductile iron. This embodiment is a further upgrade of the above embodiments, providing multiple optional implementation methods, namely, the upper grinding disc 2, lower grinding disc 3, bushings 1-5, and bushings 1-4 can all be made of any one of the following materials: high manganese steel, wear-resistant cast iron, wear-resistant alloy steel, graded functional composite material, or austenitic ductile iron.

[0054] It should be noted that the following exemplary descriptions of the various wear-resistant metal materials provided in this embodiment can be used by those skilled in the art to select appropriate materials according to actual needs, under the technical guidance of this embodiment.

[0055] The representative material of high manganese steel is ZGMn13. Under severe impact or high stress, the surface hardens rapidly (hardness can reach HB550 or above), while the core maintains high toughness, forming a "hard on the outside and tough on the inside" structure, which has excellent impact and wear resistance.

[0056] Wear-resistant cast iron: High-chromium cast iron: Contains ≥10% chromium, forming a high-hardness chromium carbide hard phase, with outstanding wear resistance and corrosion resistance, suitable for mining machinery, cement equipment, etc.; High-nickel cast iron: Improves toughness and high-temperature resistance by adding nickel, suitable for high-temperature wear-resistant parts in metallurgical equipment; High-silicon cast iron: High silicon content gives it corrosion resistance and high-temperature oxidation resistance, used in chemical equipment; White cast iron: Ordinary white cast iron has high hardness but is brittle, while improved chromium alloy white cast iron improves wear resistance and high-temperature oxidation resistance by adding chromium.

[0057] Wear-resistant alloy steel is divided into low, medium and high alloy steel. By adjusting the composition (such as chromium, nickel and molybdenum) and heat treatment process, the hardness (HRC52~58) and toughness (ak=15~30J / cm²) can be balanced, making it suitable for parts that take into account both wear resistance and fatigue resistance.

[0058] Functionally graded materials (FGMs) are composite / gradient materials. FGMs are heterogeneous materials prepared by combining two or more materials through a composite process. Their composition, structure, and properties exhibit a continuous or quasi-continuous gradient along a certain direction (such as thickness or length). Representative materials include tungsten carbide (WCSP) and chromium carbide composites (Cr2C3+Q235). Tungsten carbide (WCSP): Tungsten carbide is bonded to a steel matrix using ion implantation technology, resulting in a high-hardness surface layer (tungsten carbide) and a high-toughness core, suitable for extreme wear environments. Chromium carbide composites (Cr2C3+Q235): Combines high wear resistance with the strength of the matrix material.

[0059] Austempering ductile iron is produced by isothermal quenching to obtain an ausferritic + bainitic structure. It has high strength and good toughness, with extremely high strength and wear resistance. It also has good impact resistance and fatigue resistance, achieving a perfect combination of hardness and toughness. Its wear resistance is superior to that of ordinary ductile iron.

[0060] Based on the above embodiments, as a preferred embodiment of the grinding disc and rotor valve assembly, the wear-resistant bushing 1-4 and the bushing 1-5 are detachably connected. As described above, this embodiment is a preferred implementation method. Those skilled in the art can, under the guidance of this embodiment, choose to connect the wear-resistant bushing 1-4 and the bushing 1-5 by means of bonding, snap-fitting, etc., thereby facilitating assembly and subsequent maintenance and replacement.

[0061] Based on the above embodiments, as a preferred embodiment of the grinding disc and rotor valve assembly, the rubber disc 1-2 and the liner disc 1-5 are detachably connected. As described above, this embodiment is a preferred implementation method. Those skilled in the art can, under the guidance of this embodiment, choose to connect the rubber disc 1-2 and the liner disc 1-5 by means of bonding, snap-fitting, etc., thereby facilitating assembly and subsequent maintenance and replacement.

[0062] Based on the above embodiments, as a preferred embodiment of the grinding disc and rotor valve assembly, with the center of the upper grinding disc 2 as the origin, the feed port 2-2, compressed air inlet 2-7, pressure relief port 2-6, and spare pressure relief port 2-3 on the upper grinding disc 2 are respectively located in four quadrants.

[0063] Based on the above embodiments, as a preferred embodiment of the grinding disc and 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 facilitates efficient material spraying and reduces impact and friction.

[0064] Based on the above embodiments, as a preferred embodiment of the grinding disc and rotor valve assembly, the upper grinding disc 2 and / or the lower grinding disc 3 are provided with lubrication channels leading to the sliding seal. This embodiment provides three alternative implementation methods: the upper grinding disc 2 is provided with a lubrication channel leading to the sliding seal; the lower grinding disc 3 is provided with a lubrication channel leading to the sliding seal; or both the upper grinding disc 2 and the lower grinding disc 3 are provided with lubrication channels leading to the sliding seal.

[0065] Specifically, such as Figure 3 and Figure 4 As shown, the outer circumferential surface of the upper grinding disc 2 is provided with a grease injection hole 2-4, and the friction surface of the upper grinding disc 2 is provided with a grease discharge hole 2-5. The grease injection hole 2-4 and the grease discharge hole 2-5 are interconnected. The outer circumferential surface of the lower grinding disc 3 is provided with a grease injection hole 3-5, and the friction surface of the lower grinding disc 3 is provided with a grease discharge hole 3-5. The grease injection hole 3-5 and the grease discharge hole 3-5 are interconnected.

[0066] Preferably, there can be multiple grease injection holes 2-4 and grease outlet holes 2-5. These can be configured such that one grease injection hole 2-4 is connected to one grease outlet hole 2-5, multiple grease injection holes 2-4 are connected to one grease outlet hole 2-5, one grease injection hole 2-4 is connected to multiple grease outlet holes 2-5, or multiple grease injection holes 2-4 are connected to multiple grease outlet holes 2-5. Similarly, the preferred layout and connection relationship described above can also be used between grease injection holes 3-5 and grease outlet holes 3-5.

[0067] 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 between the feed inlet 2-2, the spare pressure relief port 2-3, the pressure relief port 2-6, the compressed air inlet 2-7, and 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 between the feed inlet 2-2, the spare pressure relief port 2-3, the pressure relief port 2-6, the compressed air inlet 2-7, and the center of the upper grinding disc 2. Preferably, both spatial layouts of the grease outlet hole 2-5 described above are simultaneously arranged. Similarly, the preferred layout and connection relationship described above can also be adopted between the grease injection hole 3-5 and the grease outlet hole 3-5.

[0068] As a preferred embodiment of the grinding disc and rotor valve assembly, such as Figures 1 to 4 As shown, the system includes a rotor liner 1, an upper grinding disc 2, and a lower grinding disc 3. The rotor liner 1 is made of composite material, consisting of wear-resistant metal and rubber, and possesses properties such as wear resistance, high temperature resistance, and pressure resistance. The upper grinding disc 2 and the lower grinding disc 3 are both made of wear-resistant metal, which prevents the pebble pump from being frequently damaged due to wear during operation. Furthermore, the upper grinding disc 2 and the lower grinding disc 3 are basically the same in size and thickness.

[0069] like Figure 1 As shown, the rotor liner 1 includes a rubber disc 1-2 and a liner 1-3. The rubber disc 1-2 can wrap around the liner 1-3, and its fixing method can be chemical adhesive connection, etc. Figure 2 The liner 1-3 shown is made by bonding the steel liner ring 1-4 and the liner 1-5 of the injection chamber. The liner 1-5 has a pre-drilled shaft hole in the center and bolt holes 1-6 machined to connect with the rotor body. The bolt holes 1-6 are evenly distributed.

[0070] like Figure 3 and Figure 4 As shown, the upper grinding disc 2 has a feed inlet 2-2, and the lower grinding disc 3 has a discharge outlet 3-2. Both the upper and lower grinding discs 2 and 3 have grease injection holes, which are connected to grease outlet holes on their working surfaces. These grease injection holes and outlet holes form a lubrication channel, allowing lubricating grease to enter the working surfaces of the upper and lower grinding discs for lubrication and cooling, preventing dry grinding and providing some protection for the grinding discs and rotor liner 1. In actual construction, the number of lubrication channels in the upper and lower grinding discs 2 and 3 is not limited to two; a single lubrication channel, multiple lubrication channels, or no lubrication channels may be used. The design of the lubrication channels can be based on the actual working conditions on site.

[0071] The upper grinding disc 2 and the lower grinding disc 3 are respectively provided with positioning hole 1 2-8 and positioning hole 2 3-3 to ensure accurate positioning of the upper grinding disc 2 and the lower grinding disc 3, and to fix the grinding disc to prevent twisting. The number and position of positioning hole 1 2-8 and positioning hole 2 3-3 can be determined according to the actual working conditions on site and are not limited to the figure shown.

[0072] The upper grinding disc 2 is also 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 inlet 2-2 are located in four quadrants respectively. Among them, the feed inlet 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.

[0073] During use, the upper grinding disc 2 and lower grinding disc 3 are fixed using bolt holes 2-9 on the upper grinding disc 2, bolt holes 3-4 on the lower grinding disc 3, and positioning holes 2-8 and 3-3 on the lower grinding disc 3. The rotor liner 1 is connected to the transmission component via bolt holes 1-6. Pressurization is applied through the compressed air inlet 2-7, causing the gravel or concrete to move relative to the grinding disc, thus producing a grinding effect. All grinding discs are made of wear-resistant metal, avoiding wear caused by the relative movement of material particles. Furthermore, extensive field research shows that the wear is most severe at the feed inlet 2-2 and discharge outlet 3-2. Replacing the grinding discs with wear-resistant metal materials avoids uneven wear. The rotor liner 1 is a moving part during operation and rotates at a uniform speed. Each rubber disc 1-2 makes uniform contact with the feed inlet 2-2 / discharge outlet 3-2, reducing uneven wear on the rubber disc 1-2 caused by the gravel.

[0074] A dry spraying machine includes a frame, a material feeding mechanism, and a grinding disc and rotor valve assembly as described in any of the above embodiments. The lower end face of the rotor valve is mounted on the frame via the lower grinding disc 3, and the upper end face of the rotor valve is connected to the material feeding mechanism via the upper grinding disc 2.

[0075] A wet spraying machine includes a frame and a material feeding mechanism, including the grinding disc and rotor valve assembly described in any of the above embodiments. The lower end face of the rotor valve is mounted on the frame via the lower grinding disc 3, and the upper end face of the rotor valve is connected to the material feeding mechanism via the upper grinding disc 2.

[0076] All aspects not detailed in this invention are conventional technical means known to those skilled in the art.

[0077] The above content shows and describes the basic principles, main features, and beneficial effects of the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A grinding disc and rotor valve assembly, wherein the rotor valve includes a rotor body and rotor liners (1) respectively connected to the upper and lower ends of the rotor body, and the grinding disc includes 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 liner (1) includes liner (1-3) and rubber disc (1-2) connected to each other. The rubber disc (1-2) of the two rotor liners (1) are used to slide and seal 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 liner (1-3) includes a liner plate (1-5) and a wear-resistant liner ring (1-4) disposed on the liner plate (1-5) for material flow. The rubber disc (1-2) is disposed on the side of the liner plate (1-5) facing the friction surface and is wrapped 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).

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

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

5. The grinding disc and rotor valve assembly according to claim 4, characterized in that: The wear-resistant metal material is high manganese steel or ductile iron.

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

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

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

9. The grinding disc and rotor valve assembly according to claim 8, 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.

10. The grinding disc and rotor valve assembly according to any one of claims 1-3, 5-6, and 8-9, characterized in that: The upper grinding disc (2) and / or the lower grinding disc (3) are provided with lubrication channels leading to the sliding seal.

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

12. A wet spraying machine, characterized in that: Includes the grinding disc and rotor valve assembly as described in any one of claims 1-10.

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