A sand mixer of the counterflow type

Abstract

The utility model relates to sand mixer technical field discloses a countercurrent sand mixer, including machine body subassembly, the machine body subassembly includes the frame, is provided with the feeding subassembly on the frame, the surface central position of feeding subassembly is provided with stirring subassembly, the surface of frame is provided with drive base, the reaction kettle is assembled on drive base, the inside movable of reaction kettle is provided with carousel, stirring subassembly includes stirring rod, the stirring rod sets up the surface central position of reaction kettle, the one end away from carousel of stirring rod is provided with hydraulic rod, the bottom of stirring rod is provided with stirring oar. The utility model discloses through the double stirring action of stirring subassembly and carousel, ensure the full mixing of sand grain and mixed material, improve mixing evenness, through the design of crushing rod and grinding ring, carry out crushing and grinding to sand grain and mixed material, make sand grain more delicate, improve mixing quality.

Description

Technical Field

[0001] This utility model relates to the field of sand mixer technology, specifically to a counter-current sand mixer. Background Technology

[0002] In industrial production, sand mixing is an indispensable part of many processes, such as in casting and chemical industries. The main function of sand mixers is to uniformly mix sand particles with binders, additives and other materials to meet the quality requirements of the production process. Traditional sand mixing equipment has certain limitations in terms of sand mixing efficiency, mixing uniformity and the crushing and grinding effect of sand particles.

[0003] For example, Chinese Patent Application No. 2022225324423 discloses a sand mixer, which includes: a sand mixer body, a stirring mechanism, and a driving mechanism; the sand mixer body includes an upper body and a lower body, the upper body has a first feeding port at its upper part, and the lower body has a discharge port at its lower part; the stirring mechanism is located at the bottom of the sand mixer body, and the portion of the stirring mechanism located inside the sand mixer body is lower than the top of the lower body; the driving mechanism is located on one side outside the sand mixer body to drive the stirring mechanism to stir the material inside the sand mixer body. When this device stirs at high speed, the material can be fully lifted and quickly stirred evenly without dead corners; however, for materials with high viscosity, the material is prone to agglomeration, resulting in uneven mixing in some areas.

[0004] Based on the above solutions, existing sand mixers cause uneven mixing of materials in the reaction tank due to large differences in particle size and density during the mixing process, and the mixing time is long. During the mixing process, materials tend to accumulate and adhere to the inner wall of the reaction tank, resulting in poor material mixing effect and difficulty in cleaning. For materials with high viscosity, materials tend to agglomerate and are not easy to disperse, resulting in low mixing efficiency. Utility Model Content

[0005] This invention provides a counter-current sand mixer to solve the problems mentioned in the background art.

[0006] To solve the above problems, the present invention provides a counter-current sand mixer with the following technical solution: It includes a machine body assembly, the machine body assembly includes a frame, a feeding assembly is disposed on the frame, and a stirring assembly is disposed at the center of the surface of the feeding assembly; The surface of the frame is provided with a drive base, and a reaction vessel is mounted on the drive base. A turntable is movably arranged inside the reaction vessel. The stirring assembly includes a stirring rod, which is located at the center of the surface of the reaction vessel. A hydraulic rod is provided at the end of the stirring rod away from the turntable. A stirring paddle is provided at the bottom end of the stirring rod. A scraper frame is provided on the surface of the stirring rod, and an arc-shaped scraper is provided on the surface of the scraper frame. The feeding assembly includes a mixing bin, one end of which is connected to the frame. Feed cylinders are provided on both sides of the mixing bin. A guide ring is provided at the bottom of the mixing bin, and a grinding ring is provided below the guide ring. The grinding ring is located at one end of the hydraulic rod output shaft.

[0007] Preferably, the end of the hydraulic rod away from the stirring rod is provided with an installation sleeve, the installation sleeve is disposed inside the frame, the surface of the frame is provided with a rotating groove adapted to the installation sleeve, and the end of the installation sleeve away from the hydraulic rod is provided with a stirring motor.

[0008] Preferably, a fixing sleeve is provided inside the mixing hopper, the fixing sleeve is disposed on the surface of the hydraulic rod, and a plurality of crushing rods are disposed on the surface of the fixing sleeve; The guide ring is adapted to the grinding ring, and the surface of the grinding ring is provided with multiple grinding holes.

[0009] Preferably, there are multiple crushing rods, which are arranged in a ring on the surface of the fixed sleeve, and the crushing rods are inclined on the fixed sleeve.

[0010] Preferably, the surface of the reaction vessel is provided with a clamp, and a vessel cover is provided on the top of the reaction vessel, the vessel cover being disposed on the outer surface of the guide ring.

[0011] Preferably, there are two can lids, which are symmetrically arranged on the clamp, and the surface of the clamp is provided with a groove that matches the can lid.

[0012] Preferably, the drive base is provided with a drive mechanism, and the output shaft of the drive mechanism is connected to the turntable through a coupling. A mounting hole is provided at a corresponding position on the bottom of the reaction tank, and the mounting hole is used to install the output shaft of the drive mechanism.

[0013] The beneficial effects of the counter-current sand mixer provided by this utility model are: 1. This utility model sets the turntable and the stirring component to rotate in opposite directions, forming countercurrent stirring, which enhances the convection and shearing of materials. During the feeding stage, the material is pre-treated by the crushing rod and grinding ring to crush large particles and perform preliminary grinding, providing a finer and more uniform material base for subsequent mixing. The stirring paddle and scraper work together to further ensure that the material is fully mixed in the tank.

[0014] 2. This utility model controls the feeding speed and crushing fineness by controlling the lifting and lowering of the hydraulic rod and adjusting the gap between the grinding ring and the guide ring. By adjusting the gap between the stirring paddle and the bottom of the turntable by extending and retracting the hydraulic rod, the shearing force on the bottom material can be changed to adapt to materials of different viscosities. Attached Figure Description

[0015] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein: Figure 1 This is a first-view schematic diagram of the overall structure of this utility model; Figure 2 This is a second-view schematic diagram of the overall structure of this utility model; Figure 3 This is a partial cross-sectional view of the mixing silo of this utility model; Figure 4 In this utility model Figure 3 Enlarged view of point A; Figure 5 This is a partial cross-sectional view of the reaction vessel of this utility model.

[0016] In the diagram: 1. Machine body assembly; 101. Frame; 102. Drive base; 103. Reaction tank; 104. Turntable; 105. Tank cover; 106. Clamp; 2. Stirring assembly; 201. Stirring motor; 202. Mounting sleeve; 203. Hydraulic rod; 204. Stirring rod; 205. Stirring paddle; 206. Scraper frame; 207. Arc-shaped scraper; 3. Feeding assembly; 301. Mixing silo; 302. Feed cylinder; 303. Fixing sleeve; 304. Crushing rod; 305. Guide ring; 306. Grinding ring; 307. Grinding hole. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0018] The number of any elements in the accompanying drawings is for illustrative purposes only and not as a limitation, and any naming is for distinction only and has no limiting meaning.

[0019] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0020] An embodiment of a counter-current sand mixer provided by this utility model: like Figures 1 to 5 As shown, the device includes a body assembly 1, which includes a frame 101. The frame 101 provides support for the entire device, ensuring sufficient strength and stability. A feeding assembly 3 is provided on the frame 101, and a stirring assembly 2 is provided at the center of the surface of the feeding assembly 3.

[0021] like Figure 2 , Figure 5 As shown, a drive base 102 is provided on the surface of the frame 101, and a reaction vessel 103 is mounted on the drive base 102. A turntable 104 is movably arranged inside the reaction vessel 103. A drive mechanism is provided inside the drive base 102, and the output shaft of the drive mechanism is connected to the turntable 104 through a coupling to provide power for the rotation of the turntable 104. A mounting hole is provided at a corresponding position on the bottom of the reaction vessel 103, and the mounting hole is used to install the output shaft of the drive mechanism.

[0022] The surface of the reaction vessel 103 is provided with a clamp 106, and a lid 105 is provided on the top of the reaction vessel 103. The lid 105 is located on the outer surface of the guide ring 305. There are two lids 105, which are symmetrically arranged on the clamp 106. The surface of the clamp 106 is provided with a groove that matches the lid 105, which facilitates the installation and removal of the lid 105 and makes it easy to clean and maintain the inside of the reaction vessel 103.

[0023] like Figures 3 to 5 As shown, the stirring assembly 2 includes a stirring rod 204, which is positioned at the center of the surface of the reaction vessel 103. A hydraulic rod 203 is provided at the end of the stirring rod 204 away from the turntable 104. The hydraulic rod 203 can adjust the position of the stirring rod 204 to adapt to the mixing requirements of sand particles at different heights. A stirring paddle 205 is provided at the bottom end of the stirring rod 204. The stirring paddle 205 fully stirs the sand particles during the stirring process to ensure uniform mixing. A scraper frame 206 is provided on the surface of the stirring rod 204, and an arc-shaped scraper 207 is provided on the surface of the scraper frame 206. The arc-shaped scraper 207 can scrape off the sand particles adhering to the inner wall of the turntable 104, preventing sand particle accumulation and improving sand mixing efficiency.

[0024] like Figure 3 As shown, the end of the hydraulic rod 203 away from the stirring rod 204 is provided with an installation sleeve 202. The installation sleeve 202 is located inside the frame 101. The surface of the frame 101 is provided with a rotating groove that matches the installation sleeve 202. The end of the installation sleeve 202 away from the hydraulic rod 203 is provided with a stirring motor 201.

[0025] like Figure 3 , Figure 4 As shown, the feeding assembly 3 includes a mixing bin 301. One end of the mixing bin 301 is connected to the frame 101. Feed cylinders 302 are provided on both sides of the mixing bin 301. The feed cylinders 302 are used to feed sand and the mixture into the mixing bin 301. A guide ring 305 is provided at the bottom of the mixing bin 301. A grinding ring 306 is provided below the guide ring 305. The grinding ring 306 is located at one end of the output shaft of the hydraulic rod 203.

[0026] like Figure 3 , Figure 4 As shown, a fixing sleeve 303 is provided inside the mixing silo 301. The fixing sleeve 303 is disposed on the surface of the hydraulic rod 203. Multiple crushing rods 304 are disposed on the surface of the fixing sleeve 303. There are multiple crushing rods 304, which are arranged in a ring on the surface of the fixing sleeve 303. The crushing rods 304 are inclined on the fixing sleeve 303.

[0027] The guide ring 305 is adapted to the grinding ring 306, and the surface of the grinding ring 306 is provided with multiple grinding holes 307.

[0028] When in use, when sand and mixture enter the mixing bin 301, they are crushed into smaller particles by the action of the crushing rod 304, which further improves the mixing effect.

[0029] Existing sand mixers, due to significant differences in material particle size and density during the mixing process, result in uneven local mixing within the reaction tank 103, and prolonged mixing time. During mixing, materials tend to accumulate and adhere to the inner wall of the reaction tank 103, leading to poor mixing efficiency and difficulty in cleaning. For highly viscous materials, they easily agglomerate and are difficult to disperse, resulting in low mixing efficiency. To address this issue, the following measures are taken: In use, first, the drive mechanism inside the drive base 102 is activated. The output shaft of the drive mechanism is connected to the turntable 104 via a coupling, providing power for the rotation of the turntable 104. Simultaneously, the stirring motor 201 is activated, driving the mounting sleeve 202, hydraulic rod 203, and stirring rod 204 to rotate together. At this time, the rotation direction of the turntable 104 and the stirring rod 204 is opposite. The sand and the mixture are subjected to two opposing stirring forces within the reaction tank 103. This counter-current stirring method creates complex convection and vortices within the reaction tank, resulting in more frequent relative movements between material particles. Simultaneously, the stirring paddle 205 moves along with the stirring rod 204. 4. The stirring rods rotate together, so that the stirring paddle 205 can fully stir the sand particles during the stirring process, ensuring uniform mixing. It is worth noting that the bottom of the stirring paddle 205 is provided with a groove to intensify the grinding and crushing of the material between the stirring paddle 205 and the turntable 104. At the same time, the stirring rod 204 drives the scraper frame 206 and the arc-shaped scraper 207 to move together, so that the arc-shaped scraper 207 can clean the sand particles adhering to the inner wall of the turntable 104, prevent the sand particles from bridging and accumulating, and ensure that the material particles can be fully stirred and mixed near the bottom of the reaction tank 103, improving the sand mixing efficiency and effectively preventing the accumulation and adhesion of materials at the bottom of the reaction tank 103, reducing the difficulty of cleaning.

[0030] It is worth noting that the countercurrent stirring method described above makes the flow path of the material in the reaction tank 103 more complex, enhances the collision and shearing action between material particles, and makes the material particles easier to break and grind under these shearing forces. For some highly viscous materials, countercurrent stirring can effectively prevent the material from agglomerating, significantly improve the dispersion of the material, and make the contact between material particles more sufficient. Through the cooperation of the stirring component 2 and the turntable 104, the material can be fully stirred and mixed in all areas of the reaction tank 103, reducing mixing dead zones, significantly improving the mixing uniformity, significantly shortening the mixing time, and improving production efficiency.

[0031] During the above-mentioned mixing process, in order to improve the grinding and mixing effect of the materials, the hydraulic rod 203 is controlled to retract by the controller. The hydraulic rod 203 drives the stirring rod 204 and the stirring paddle 205 to move upward in the vertical direction, thereby moving the stirring paddle 205 and the arc scraper 207 away from the turntable 104. In this process, the gap between the stirring paddle 205 and the arc scraper 207 and the turntable 104 is increased, so that the stirring paddle 205 and the arc scraper 207 grind and crush the materials in the gap, thereby improving the mixing effect.

[0032] Due to the significant differences in particle size and density between the sand and the mixture, uneven mixing of the materials can occur in certain areas within the reaction tank 103. To address this issue, during feeding, the sand and the mixture are first fed into the mixing silo 301 through the feed cylinder 302. Inside the mixing silo 301, the hydraulic rod 203 drives the fixed sleeve 303 and the crushing rod 304 to rotate together. The sand and the mixture are then crushed by the crushing action of the crushing rod 304, breaking large pieces of sand and the mixture into smaller particles. The material enters the gap between the guide ring 305 and the grinding ring 306. The grinding ring 306 rotates together with the hydraulic rod 203. The material is ground in the grinding hole 307 of the grinding ring 306, making the sand particles finer. The crushed and ground sand particles and mixture fall from the gap between the guide ring 305 and the grinding ring 306 into the reaction tank 103. By setting the guide ring 305 and the grinding ring 306 to cooperate, the crushed and ground sand particles and mixture are guided and dispersed for feeding, avoiding material accumulation.

[0033] During the feeding process, the crushing degree and feeding speed of the material can be adjusted according to actual needs. Specifically, the controller controls the hydraulic rod 203 to retract, and the hydraulic rod 203 drives the grinding ring 306 to move upward in the vertical direction, thereby reducing the gap between the grinding ring 306 and the guide ring 305, reducing the feeding speed, and increasing the time that the material stays in the mixing bin 301, thereby improving the crushing effect of the crushing rod 304 on the material, and thus improving the quality of the mixed sand in the subsequent mixing process.

[0034] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0035] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A counter-current sand mixer, comprising a body assembly (1), wherein the body assembly (1) includes a frame (101), characterized in that: A feeding assembly (3) is provided on the frame (101), and a stirring assembly (2) is provided at the center of the surface of the feeding assembly (3). The surface of the frame (101) is provided with a drive base (102), and a reaction vessel (103) is mounted on the drive base (102). A turntable (104) is movably arranged inside the reaction vessel (103). The stirring assembly (2) includes a stirring rod (204), which is located at the center of the surface of the reaction vessel (103). A hydraulic rod (203) is provided at one end of the stirring rod (204) away from the turntable (104). A stirring paddle (205) is provided at the bottom end of the stirring rod (204). A scraper frame (206) is provided on the surface of the stirring rod (204), and an arc-shaped scraper (207) is provided on the surface of the scraper frame (206). The feeding assembly (3) includes a mixing bin (301), one end of which is connected to the frame (101). Feed cylinders (302) are provided on both sides of the mixing bin (301). A guide ring (305) is provided at the bottom of the mixing bin (301). A grinding ring (306) is provided below the guide ring (305). The grinding ring (306) is located at one end of the output shaft of the hydraulic rod (203).

2. The counter-current sand mixer according to claim 1, characterized in that: The hydraulic rod (203) is provided with an installation sleeve (202) at the end away from the stirring rod (204). The installation sleeve (202) is located inside the frame (101). The surface of the frame (101) is provided with a rotating groove that matches the installation sleeve (202). The end of the installation sleeve (202) away from the hydraulic rod (203) is provided with a stirring motor (201).

3. A counter-current sand mixer according to claim 1, characterized in that: The mixing silo (301) is provided with a fixing sleeve (303) inside. The fixing sleeve (303) is provided on the surface of the hydraulic rod (203). The surface of the fixing sleeve (303) is provided with a plurality of crushing rods (304). The guide ring (305) is adapted to the grinding ring (306), and the surface of the grinding ring (306) is provided with a plurality of grinding holes (307).

4. A counter-current sand mixer according to claim 3, characterized in that: There are multiple crushing rods (304), and the multiple crushing rods (304) are arranged in a ring on the surface of the fixed sleeve (303), and the crushing rods (304) are inclined on the fixed sleeve (303).

5. A counter-current sand mixer according to claim 1, characterized in that: The surface of the reaction vessel (103) is provided with a clamp (106), and a lid (105) is provided on the top of the reaction vessel (103). The lid (105) is located on the outer surface of the guide ring (305).

6. A counter-current sand mixer according to claim 5, characterized in that: There are two can lids (105), which are symmetrically arranged on the clamp (106). The surface of the clamp (106) is provided with a groove that matches the can lid (105).

7. A counter-current sand mixer according to claim 1, characterized in that: The drive base (102) is equipped with a drive mechanism, and the output shaft of the drive mechanism is connected to the turntable (104) through a coupling. The bottom of the reaction tank (103) is provided with a corresponding mounting hole, which is used to install the output shaft of the drive mechanism.

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