Recovery equipment for foundry used sand solid waste

Abstract

The invention relates to foundry used sand solid waste recycling equipment which comprises a supporting frame, a screening assembly is movably installed in the supporting frame, a plurality of smashing and clamping assemblies are arranged in the screening assembly, and the two ends of the screening assembly and the two ends of the smashing and clamping assemblies are movably connected to the supporting frame through bearings; the screening assembly comprises a first screening roller movably connected into the supporting frame, and a coaxial second screening roller is arranged in the first screening roller in a sleeved mode. Due to the arrangement of the first screening roller, the second screening roller and the third screening roller, under the cooperation of the corresponding crushing clamping assemblies, good graded crushing can be achieved, the crushing effect is better, automatic step-by-step screening can be directly completed, and the crushing effect is better; and the continuously rotating screening roller body can drive the crushing meshing teeth in the screening roller body to rotate, so that the purpose of beating the sand blocks is achieved, and the crushing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of molding sand casting, in particular to a device for recycling old casting sand solid waste. Background Art

[0002] The foundry industry is a basic industry in the manufacturing industry, and the development of various industries is inseparable from castings. From automobiles, machine tools, agricultural machinery, metallurgical mining equipment to aviation, aerospace, defense industries, and even construction hardware, household appliances and other industries, a large number of castings are needed every year. The foundry industry is a resource-intensive industry, consuming a large amount of energy and various raw and auxiliary materials every year. Foundry sand is one of the auxiliary materials with the largest consumption. When sand casting is carried out, it is necessary to use foundry sand to make sand molds and sand cores. After the pouring is completed, it becomes old sand, resulting in a waste of raw materials.

[0003] The recycling of used foundry sand requires crushing and screening. Most of the existing recycling crushing devices are single-stage crushing, which has poor crushing effect and is very destructive to the crushing mechanism. Some equipment with graded crushing requires the installation of a conveying mechanism between different crushing mechanisms to allow the particles crushed in the previous stage to be conveyed to the crushing mechanism of the next stage, which increases the space occupied by the equipment and the purchase cost of the equipment production machine. In addition, the installation of the conveying mechanism increases the production time and reduces the recycling efficiency. Therefore, it is necessary to develop a recycling equipment for used foundry sand solid waste to solve the shortcomings of the existing technology. Summary of the Invention

[0004] The present invention aims to solve the technical problems existing in the prior art and provides a device for recycling solid waste of used foundry sand.

[0005] The present invention solves the above-mentioned technical problem with the following technical solution: A device for recycling foundry sand solid waste comprises a support frame, a screening assembly is movably installed inside the support frame, a plurality of crushing and clamping assemblies are arranged inside the screening assembly, and both ends of the screening assembly and the plurality of crushing and clamping assemblies are movably connected to the support frame via bearings; The screening assembly includes a first screening roller movably connected to the support frame, a coaxial second screening roller is sleeved inside the first screening roller, a coaxial third screening roller is sleeved inside the second screening roller, several of the crushing clamping assemblies correspond to the first screening roller, the second screening roller and the third screening roller respectively, and several of the crushing clamping assemblies are meshed and connected to the bottom of the inner cavity of the first screening roller, the second screening roller and the third screening roller respectively. Both ends of the crushing clamping assembly extend to the outside of the support frame and are fixedly sleeved with transmission gears, and two adjacent transmission gears are meshed with each other.

[0006] As a preferred technical solution of the present invention, the distance between the outer surface of the second screening roller and the inner wall of the first screening roller is the same as the distance between the inner wall of the second screening roller and the outer surface of the third screening roller, and is larger than the outer diameter size of the crushing clamping assembly, and the inner diameter of the third screening roller is larger than the outer diameter size of the crushing clamping assembly.

[0007] As a preferred technical solution of the present invention, the first screening roller, the second screening roller and the third screening roller have the same structure and are all composed of a screening roller body and a number of evenly distributed crushing teeth and screening grooves. Both ends of the outer surface of the screening roller body are rotatably sleeved with locating bearings, and the outer surface of the locating bearing is fixedly connected to the inner wall of the support frame.

[0008] As a preferred technical solution of the present invention, several of the crushing teeth are integrally formed on the inner wall of the screening roller body, and several of the screening grooves are evenly opened on the screening roller body. Both sides of the screening grooves respectively penetrate the inner and outer sides of the screening roller body, and several crushing teeth and screening grooves are alternately distributed.

[0009] As a preferred technical solution of the present invention, the density of the crushing teeth in the first screening roller, the second screening roller and the third screening roller increases successively, and are tightly meshed with their corresponding crushing clamping assemblies respectively.

[0010] As a preferred technical solution of the present invention, the inner diameters of the screening grooves in the first screening roller, the second screening roller and the third screening roller decrease successively, the screening roller body and the crushing tooth surfaces are smooth, and the inner wall of the screening groove is smooth.

[0011] As a preferred technical solution of the present invention, the crushing clamping assembly includes a crushing clamping roller sleeved inside the screening roller body, and both ends of the crushing clamping roller are fixedly connected to a feeding pipe, and both ends of the feeding pipe pass through the support frame and extend to the front and rear sides of the support frame respectively, and are fixedly sleeved inside a corresponding transmission gear.

[0012] As a preferred technical solution of the present invention, the outer surface of the crushing clamping roller is integrally formed with a number of evenly distributed crushing clamping teeth, and the crushing clamping roller engages with the crushing interlocking teeth on the inner wall of a corresponding screening roller body through the crushing clamping teeth on its outer surface.

[0013] As a preferred technical solution of the present invention, a feeding cavity is opened in the middle of the crushing clamping roller, and the two ends of the feeding cavity are respectively connected to two feeding pipes. A plurality of feeding grooves are evenly distributed on the outer surface of the crushing clamping roller, and the inner sides of the feeding grooves are connected to the feeding cavity. The inner diameter of the feeding cavity is larger than the inner diameter of a corresponding screening groove in the screening roller body.

[0014] As a preferred technical solution of the present invention, a feeding port is provided on both the front and rear sides of the support frame, and the feeding port is connected to the inside of the screening roller body in the first screening roller and the outside of the corresponding crushing clamping assembly. The bottom of the support frame is integrally formed with a reinforcement base, and the top of the reinforcement base is provided with a collecting trough, the width of the collecting trough is larger than the diameter of the screening roller body, and the length of the collecting trough is larger than the axial length of the screening roller body; a driving mechanism is installed at the rear of the support frame, and the output end of the driving mechanism is transmission-connected to one of the feeding pipes.

[0015] The beneficial effects of the present invention are: due to the arrangement of the first screening roller, the second screening roller and the third screening roller, with the cooperation of the corresponding crushing clamping components, it is possible to achieve good graded crushing, which makes the crushing effect better, and can directly complete automatic step-by-step screening, which makes the crushing effect better; and the continuously rotating screening roller body can drive the crushing meshing teeth inside it to rotate, so as to achieve the purpose of breaking the sand blocks, thereby helping to improve the crushing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is a side view of the present invention; Figure 3 It is a front view of the present invention; Figure 4 It is a cross-sectional view of the front side of the present invention; Figure 5 A sectional view of the side of the present invention; Figure 6 for Figure 5 Front view of the mid-section; Figure 7 It is a structural schematic diagram of the screening roller body of the present invention; Figure 8 It is a schematic structural diagram of the crushing clamping roller of the present invention.

[0017] In the accompanying drawings, the components represented by the reference numerals are as follows: 1. Support frame; 2. Screening assembly; 21. First screening roller; 211. Screening roller body; 212. Crushing bite teeth; 213. Screening trough; 22. Second screening roller; 23. Third screening roller; 3. Crushing clamping assembly; 31. Crushing clamping roller; 32. Feeding pipe; 33. Crushing clamping teeth; 34. Feeding trough; 35. Feeding chamber; 4. Transmission gear; 5. Feeding port; 6. Reinforced base; 7. Collecting trough; 8. Positioning bearing. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0019] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0020] In the description of this application, the term "for example" is used to mean "used as an example, illustration or explanation". Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is given to enable any person skilled in the art to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art will recognize that the present invention can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0021] Example 1 like Figures 1 to 8 As shown, a recycling device for foundry sand solid waste includes a support frame 1, a screening assembly 2 is movably installed inside the support frame 1, and a plurality of crushing and clamping assemblies 3 are arranged inside the screening assembly 2. Both ends of the screening assembly 2 and the plurality of crushing and clamping assemblies 3 are movably connected to the support frame 1 through bearings; The screening assembly 2 includes a first screening roller 21 movably connected to the support frame 1, a coaxial second screening roller 22 is sleeved inside the first screening roller 21, a coaxial third screening roller 23 is sleeved inside the second screening roller 22, and a plurality of crushing clamping assemblies 3 correspond to the first screening roller 21, the second screening roller 22 and the third screening roller 23 respectively. The plurality of crushing clamping assemblies 3 are respectively meshed and connected to the bottom of the inner cavity of the first screening roller 21, the second screening roller 22 and the third screening roller 23, and the two ends of the crushing clamping assembly 3 extend to the support frame 1. The outside of the sieve roller 21 is fixedly sleeved with a transmission gear 4, and two adjacent transmission gears 4 are meshed with each other; due to the arrangement of the first screening roller 21, the second screening roller 22 and the third screening roller 23, with the cooperation of the corresponding crushing clamping assembly 3, it can not only achieve good graded crushing, so that the crushing effect is better, but also can directly complete the automatic step-by-step screening, so that the crushing effect is better; and the continuously rotating screening roller body 211 can drive the crushing meshing teeth 212 inside it to rotate, so as to achieve the purpose of breaking the sand blocks, thereby helping to improve the crushing efficiency.

[0022] Among them, the distance between the outer surface of the second screening roller 22 and the inner wall of the first screening roller 21 is the same as the distance between the inner wall of the second screening roller 22 and the outer surface of the third screening roller 23, and is larger than the outer diameter size of the crushing clamping assembly 3, and the inner diameter of the third screening roller 23 is larger than the outer diameter size of the crushing clamping assembly 3; due to this design, it can be ensured that the crushing clamping assembly 3 can rotate smoothly in the corresponding screening roller body 211, and drive the corresponding screening roller body 211 to rotate, so as to achieve the purpose of beating and squeezing the sand blocks to complete the crushing.

[0023] Among them, the first screening roller 21, the second screening roller 22 and the third screening roller 23 have the same structure, and are all composed of a screening roller body 211 and a number of evenly distributed crushing meshing teeth 212 and screening grooves 213. Both ends of the outer surface of the screening roller body 211 are rotatably sleeved with positioning bearings 8, and the outer surface of the positioning bearing 8 is fixedly connected to the inner wall of the support frame 1; due to the setting of the positioning bearing 8, it can be ensured that the screening roller body 211 can be stably installed in the support frame 1, and it can also be ensured that the screening roller body 211 can rotate continuously following the corresponding crushing clamping assembly 3.

[0024] Among them, a number of crushing interlocking teeth 212 are integrally formed on the inner wall of the screening roller body 211, and a number of screening grooves 213 are evenly opened on the screening roller body 211. The two sides of the screening grooves 213 respectively penetrate the inner and outer sides of the screening roller body 211, and a number of crushing interlocking teeth 212 and screening grooves 213 are alternately distributed; due to the setting of the crushing interlocking teeth 212, it can be continuously rotated with the cooperation of the crushing clamping component 3 to achieve the purpose of knocking the sand blocks, and at the same time, the purpose of crushing the sand blocks can be achieved with the cooperation of the crushing clamping component 3.

[0025] Among them, the density of the crushing meshing teeth 212 in the first screening roller 21, the second screening roller 22 and the third screening roller 23 increases successively, and they are tightly meshed with their corresponding crushing clamping components 3 respectively; due to the different densities of the crushing meshing teeth 212 in different screening roller bodies 211, the sand blocks they contact can be crushed to different degrees, and then, with the cooperation of the corresponding screening slots 213, they can fall one by one into the screening roller body 211 below, and further complete the next level of crushing and screening.

[0026] The inner diameters of the screening grooves 213 in the first screening roller 21 , the second screening roller 22 and the third screening roller 23 decrease in sequence. The surfaces of the screening roller bodies 211 and the crushing teeth 212 are smooth, and the inner walls of the screening grooves 213 are smooth.

[0027] The crushing clamping assembly 3 includes a crushing clamping roller 31 sleeved inside the screening roller body 211. A feeding pipe 32 is fixedly connected to each end of the crushing clamping roller 31. Both ends of the feeding pipe 32 penetrate the support frame 1 and extend to the front and rear sides of the support frame 1, respectively, and are fixedly sleeved inside a corresponding transmission gear 4. Due to the provision of the feeding pipe 32, the corresponding screening roller body 211 can be driven to rotate by the cooperation of the transmission gear 4 and the corresponding crushing meshing teeth 212. It is also convenient for staff to directly temporarily add old sand of the corresponding particle size, avoiding the need to completely add it from the feeding port 5, thereby increasing the crushing and screening process it needs to go through, and avoiding the situation where too small old sand passes through without being crushed. This improves the crushing efficiency.

[0028] The outer surface of the crushing clamping roller 31 is integrally formed with a plurality of evenly distributed crushing clamping teeth 33 , and the crushing clamping roller 31 engages with the crushing engaging teeth 212 on the inner wall of a corresponding screening roller body 211 through the crushing clamping teeth 33 on its outer surface.

[0029] A feeding chamber 35 is provided in the middle of the crushing clamping roller 31. The two ends of the feeding chamber 35 are connected to two feeding pipes 32. A plurality of feeding grooves 34 are evenly distributed on the outer surface of the crushing clamping roller 31. The inner sides of the feeding grooves 34 are connected to the feeding chamber 35. The inner diameter of the feeding cavity 35 is larger than the inner diameter of the screening groove 213 in the corresponding screening roller body 211 .

[0030] Among them, a loading port 5 is opened on the front and back sides of the support frame 1, and the loading port 5 is connected to the inside of the screening roller body 211 in the first screening roller 21 and the corresponding crushing clamping assembly 3 to the outside. The bottom of the support frame 1 is integrally formed with a reinforcement base 6, and the top of the reinforcement base 6 is opened with a collecting groove 7. The width dimension of the collecting groove 7 is larger than the diameter dimension of the screening roller body 211, and the length dimension of the collecting groove 7 is larger than the axial length dimension of the screening roller body 211; a driving mechanism is installed at the rear of the support frame 1, and the output end of the driving mechanism is transmission-connected to one of the feeding pipes 32.

[0031] Example 2 As shown in the figure, the driving mechanism is started to drive the corresponding feeding tube 32 to rotate, and the feeding tubes 32 can be rotated simultaneously with the cooperation of the transmission gear 4, and then the corresponding screening roller body 211 is driven to rotate with the cooperation of the crushing clamping teeth 33 and the crushing engaging teeth 212, so that the screening roller bodies 211 can rotate simultaneously and continuously; Large particles or sand blocks are added from the feeding port 5, and can fall to the bottom of the inner cavity of the third screening roller 23 under the action of gravity, and then the large particles or sand blocks can be squeezed and crushed with the cooperation of the crushing engaging teeth 212 on the inner wall of the corresponding screening roller body 211 and the crushing clamping teeth 33 on the surface of the internal crushing clamping roller 31. After crushing, they flow out from the screening groove 213 and fall into the second screening roller 22 of the next level of the outer layer. As above, with the cooperation of the corresponding crushing clamping component 3, they are further crushed and fall into the first screening roller 21. As above, with the cooperation of the corresponding crushing clamping component 3, they fall into the collecting trough 7 after being crushed to complete the crushing and collection.

[0032] It should be noted that, in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0033] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0034] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A device for recycling foundry sand solid waste, comprising a support frame (1), characterized in that: A screening assembly (2) is movably mounted inside the support frame (1), and a plurality of crushing and clamping assemblies (3) are arranged inside the screening assembly (2). Both ends of the screening assembly (2) and the plurality of crushing and clamping assemblies (3) are movably connected to the support frame (1) via bearings. The screening assembly (2) includes a first screening roller (21) movably connected to the support frame (1), a coaxial second screening roller (22) is sleeved inside the first screening roller (21), and a coaxial third screening roller (23) is sleeved inside the second screening roller (22), and a plurality of the crushing clamping assemblies (3) correspond to the first screening roller (21), the second screening roller (22) and the third screening roller (23) respectively. The plurality of the crushing clamping assemblies (3) are respectively meshed and connected to the bottom of the inner cavity of the first screening roller (21), the second screening roller (22) and the third screening roller (23), and both ends of the crushing clamping assemblies (3) extend to the outside of the support frame (1) and are fixedly sleeved with transmission gears (4), and two adjacent transmission gears (4) are meshed with each other.

2. The recycling equipment for used foundry sand solid waste according to claim 1, characterized in that: The distance between the outer surface of the second screening roller (22) and the inner wall of the first screening roller (21) is the same as the distance between the inner wall of the second screening roller (22) and the outer surface of the third screening roller (23), and is larger than the outer diameter of the crushing clamping assembly (3). The inner diameter of the third screening roller (23) is larger than the outer diameter of the crushing clamping assembly (3).

3. The recycling equipment for used foundry sand solid waste according to claim 1, characterized in that: The first screening roller (21), the second screening roller (22) and the third screening roller (23) have the same structure and are composed of a screening roller body (211) and a plurality of evenly distributed crushing teeth (212) and screening grooves (213). Both ends of the outer surface of the screening roller body (211) are rotatably sleeved with positioning bearings (8), and the outer surface of the positioning bearing (8) is fixedly connected to the inner wall of the support frame (1).

4. The recycling equipment for used foundry sand solid waste according to claim 3, characterized in that: The plurality of crushing engaging teeth (212) are integrally formed on the inner wall of the screening roller body (211), and the plurality of screening grooves (213) are evenly arranged on the screening roller body (211). Both sides of the screening grooves (213) respectively penetrate the inner and outer sides of the screening roller body (211), and the plurality of crushing engaging teeth (212) and the screening grooves (213) are alternately distributed.

5. The recycling equipment for used foundry sand solid waste according to claim 3, characterized in that: The density of the crushing engaging teeth (212) in the first screening roller (21), the second screening roller (22), and the third screening roller (23) increases sequentially, and they are tightly meshed with the corresponding crushing clamping components (3).

6. The recycling equipment for used foundry sand solid waste according to claim 3, characterized in that: The inner diameters of the screening grooves (213) in the first screening roller (21), the second screening roller (22), and the third screening roller (23) decrease in sequence; the surfaces of the screening roller bodies (211) and the crushing teeth (212) are smooth; and the inner walls of the screening grooves (213) are smooth.

7. The recycling equipment for used foundry sand solid waste according to claim 3, characterized in that: The crushing clamping assembly (3) comprises a crushing clamping roller (31) sleeved inside the screening roller body (211), and both ends of the crushing clamping roller (31) are fixedly connected to a feeding pipe (32), and both ends of the feeding pipe (32) pass through the support frame (1) and extend to the front and rear sides of the support frame (1) respectively, and are fixedly sleeved inside a corresponding transmission gear (4).

8. The equipment for recycling used foundry sand solid waste according to claim 7, characterized in that: The outer surface of the crushing clamping roller (31) is integrally formed with a plurality of evenly distributed crushing clamping teeth (33), and the crushing clamping roller (31) engages with the crushing engaging teeth (212) on the inner wall of a corresponding screening roller body (211) through the crushing clamping teeth (33) on its outer surface.

9. The device for recycling used foundry sand solid waste according to claim 7, characterized in that: A feeding cavity (35) is provided in the middle of the crushing clamping roller (31), and both ends of the feeding cavity (35) are communicated with two feeding pipes (32) respectively. A plurality of evenly distributed feeding grooves (34) are provided on the outer surface of the crushing clamping roller (31), and the inner sides of the feeding grooves (34) are communicated with the feeding cavity (35); The inner diameter of the feeding cavity (35) is larger than the inner diameter of a corresponding screening groove (213) in the screening roller body (211).

10. The equipment for recycling used foundry sand solid waste according to claim 3, characterized in that: A feeding port (5) is provided on both the front and rear sides of the support frame (1), and the feeding port (5) is communicated with the interior of the screening roller body (211) in the first screening roller (21) and the corresponding crushing clamping assembly (3) to the outside. A reinforcement base (6) is integrally formed at the bottom of the support frame (1), and a collecting trough (7) is provided on the top of the reinforcement base (6). The width of the collecting trough (7) is greater than the diameter of the screening roller body (211), and the length of the collecting trough (7) is greater than the axial length of the screening roller body (211). A driving mechanism is installed at the rear of the support frame (1), and the output end of the driving mechanism is connected to one of the feeding pipes (32) in a transmission manner.

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