Double-runner-wheel type sand mixer for casting

Abstract

The utility model discloses a double-runner-wheel type sand mixer for casting, relates to the technical field of casting sand mixing, and solves the problem that sand layers with different hardness and thickness cannot be adapted in the rolling process in the prior art. Comprising a sand mixing cylinder, the bottom of the sand mixing cylinder is evenly connected with a plurality of supporting legs, the lower end of the sand mixing cylinder is connected with a driving mechanism, a driving shaft of the driving mechanism is connected with a rotating shaft, the rotating shaft is symmetrically connected with two sets of stirring paddles, and the ends, attached to the inner side wall of the sand mixing cylinder, of the stirring paddles are connected with scrapers; the rotating shaft is also symmetrically connected with two groups of grinding rings; the top of the sand mixing cylinder is symmetrically connected with two groups of cleaning devices, and the cleaning devices correspond to the grinding rings; the bottom of the sand mixing cylinder is connected with a discharging pipe, and a discharging hole is formed in the position, corresponding to the discharging pipe, of the bottom of the sand mixing cylinder. The grinding wheel has the beneficial effects that the grinding wheel can better adapt to sand layers with different hardness and thicknesses, the uniformity and consistency of the grinding effect are ensured, and the counter-acting force of the grinding wheel from the sand layers is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to foundry sand mixing technical field, concretely is a kind of double roller type sand mixer for casting. BACKGROUND

[0002] Sand mixer is through rolling, kneading and rubbing, old sand, new sand, sand binder and auxiliary materials are mixed evenly, and binder and auxiliary materials are evenly distributed and effectively coated on the surface of sand particles, so that the sand of the equipment that meets the requirements of casting is prepared, sand mixer is the main equipment of casting sand treatment sand mixing, and is the key equipment to obtain qualified sand.The sand mixer utilizes the relative movement of the roller and the mill plate to crush the material placed between them by rolling and grinding, and the sand mixer also mixes the material while crushing the material, which is an ideal device for producing non-fired bricks, sand bricks, cement bricks, refractory bricks, crushed and mixed fly ash, boiler slag, tailings and industrial waste slag for brick making raw materials.

[0003] The structure of the current roller type sand mixer is generally as disclosed in the patent application No. "CN202310406057.0", which includes a sand mixing cylinder, a central shaft rotatingly arranged in the sand mixing cylinder, two horizontal shafts arranged on the central shaft, two rollers arranged on the two horizontal shafts respectively, a contact portion arranged on the end of the horizontal shaft away from the central shaft, the contact portion being in contact with the inner wall of the sand mixing cylinder, and the roller being axially slidingly arranged on the horizontal shaft. Each horizontal shaft is provided with two elastic devices. However, this invention can only automatically adjust the position of the two rollers according to the size of the centrifugal force to avoid damage to the central shaft due to excessive stress, and cannot adapt to sand layers of different hardness and thickness to ensure uniform contact pressure on different sand layers.

[0004] Therefore, the utility model provides a double roller type sand mixer for casting to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a double roller type sand mixer for casting to solve the problem of not being able to adapt to sand layers of different hardness and thickness during the rolling process in the prior art.

[0006] The technical solution adopted by the utility model to solve the technical problem is:

[0007] The utility model provides a kind of double roller type sand mixer for casting, including sand mixing barrel, the bottom of the sand mixing barrel is uniformly connected with multiple support legs, the lower end of sand mixing barrel is connected with driving mechanism, the driving shaft of driving mechanism is rotatably connected with the bottom wall of the sand mixing barrel, the driving shaft is connected with rotating shaft, two groups of stirring paddles are symmetrically connected on the rotating shaft, the stirring paddle is in the state of adhesion with the inside bottom wall of the sand mixing barrel, the stirring paddle is arranged obliquely, one end of the stirring paddle adhesion with the inside wall of the sand mixing barrel is connected with scraper, the height of the scraper is higher than the stirring paddle, the scraper is in the state of adhesion with the inside wall of the sand mixing barrel;Two groups of roller rings are also symmetrically connected on the rotating shaft, the roller ring is rotatably connected on connecting block, the connecting plate is connected with the connecting block on the rotating shaft, the top of the connecting block is connected with guide rod, the connecting plate is correspondingly provided with guide slot on the guide rod, reset spring is connected between the connecting block and the connecting plate;The top of the sand mixing barrel is symmetrically connected with two groups of cleaning devices, and the cleaning device corresponds with the roller ring;The bottom of the sand mixing barrel is connected with discharge pipe, the bottom of the sand mixing barrel is provided with discharge hole corresponding to the discharge pipe, the discharge hole is slidably connected with the baffle, the side of the baffle is connected with connecting lug, the sand mixing barrel is connected with fixed lug corresponding to the connecting lug, and the fixed lug and the connecting lug are connected with positioning pin.

[0008] By adopting the above technical scheme, different hardness and thickness of sand layer can be better adapted to, ensure that the rolling effect is uniform, reduce the reaction force of the roller from the sand layer, avoid the damage of the roller due to excessive stress, and reduce the vibration and improve the sand mixing efficiency.

[0009] Further, the cleaning device includes a cleaning roller and a transmission mechanism, the transmission mechanism is detachably connected to the top of the sand mixing barrel, the top of the cleaning roller is connected to the transmission mechanism, the cleaning roller is composed of stainless steel wire, a first driving motor is connected to the bottom of the transmission mechanism to drive the transmission mechanism to operate.

[0010] By adopting the above technical scheme, the sand particles that may be attached to the roller ring can be removed, and the material accumulation of the roller ring due to long-time work can be avoided.

[0011] Further, a threaded blade is longitudinally arranged in the discharge pipe, a second driving motor drives the threaded blade to rotate in the discharge pipe, the second driving motor is connected to the bottom of the discharge pipe, a partition plate is arranged between the second driving motor and the threaded blade, the partition plate is fixedly connected to the discharge pipe, and a discharge groove is formed in one side of the top of the partition plate.

[0012] By adopting the above technical scheme, efficient discharging can be realized, and the blockage of sand material can be avoided.

[0013] Further, the upper end of the partition plate is arranged obliquely.

[0014] By adopting the technical scheme, the sand can be smoothly discharged, and residue is reduced.

[0015] Further, the upper end of the connecting plate is connected with a flange plate, and the connecting plate is detachably connected with the rotating shaft through the flange plate.

[0016] By adopting the technical scheme, the roller ring can be more conveniently maintained or replaced, and the maintenance cost is reduced.

[0017] Further, the upper end of the mixing sand barrel is provided with a dust cover, the dust cover is provided with an avoiding groove corresponding to the transmission mechanism, and the circumferential side of the dust cover is connected with a handle.

[0018] By adopting the technical scheme, the dust generated in the sand mixing process can be prevented from leaking out, and the working environment and the health of the workers are protected.

[0019] Further, the top of the dust cover is provided with an observation window.

[0020] By adopting the technical scheme, the worker can observe the sand mixing condition in the mixing sand barrel in real time, and then timely adjust the abnormal condition in the work.

[0021] Compared with the prior art, the utility model has the beneficial effects that:

[0022] The utility model discloses a center sand of mixing sand barrel moves down through two groups of stirring paddles and scrapes, and the bottom sand of mixing sand barrel centrifugal motion, and the edge sand of mixing sand barrel lifts and moves, and then sand can reciprocatingly overturn and move, and the inside bottom wall of stirring paddle and mixing sand barrel is in the state of adhesion, and the inside lateral wall of scraping and mixing sand barrel is in the state of adhesion, and then sand is scraped from the bottom and lateral wall of inner container, ensures that sand can be all -round stirred, avoids sand accumulation, and makes it preliminary mixing even.

[0023] Meanwhile, the roller ring also rolls and rubs the sand mixture under the action of the connecting block and the reset spring, the roller ring can freely ascend and descend along with the change of the sand layer thickness, the reset spring makes the roller ring better adapt to the sand layer of different hardness and thickness, ensures the uniformity of the rolling effect, reduces the reaction force of the roller wheel from the sand layer, avoids the damage of the roller wheel due to excessive stress, simultaneously reduces the vibration, and improves the sand mixing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a vertical explosion structure schematic view of the utility model;

[0025] Figure 2 It is a front view of the utility model;

[0026] Figure 3It is the right view partial section schematic view of the utility model;

[0027] Figure 4 It is the main view partial section schematic view of the utility model;

[0028] In the figure: 1, sand mixing barrel;2, support leg;3, driving mechanism;4, driving shaft;5, rotating shaft;6, stirring paddle;7, scraper;8, grinding ring;9, connecting block;10, connecting plate;11, flange plate;12, guide rod;13, guide groove;14, reset spring;15, blanking pipe;16, blanking hole;17, baffle;18, connecting lug;19, fixing lug;20, positioning pin;21, cleaning roller;22, transmission mechanism;23, first driving motor;24, threaded blade;25, second driving motor;26, partition;27, blanking groove;28, dust cover;29, handle;30, observation window. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantage of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0030] In the present application, the orientation or position relationship indicated by the terms "upper", "inner", "outer", "middle" and the like is based on the orientation or position relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0031] As Figures 1-4As shown, a double roller sand mixer for casting includes a sand mixing drum 1, a plurality of support legs 2 are uniformly connected to the bottom of the sand mixing drum 1, a driving mechanism 3 is connected to the lower end of the sand mixing drum 1, a driving shaft 4 of the driving mechanism 3 is rotatably connected to the bottom wall of the sand mixing drum 1, a rotating shaft 5 is connected to the driving shaft 4, two groups of stirring paddles 6 are symmetrically connected to the rotating shaft 5, the stirring paddles 6 are in a state of adhesion with the inner bottom wall of the sand mixing drum 1, the stirring paddles 6 are inclined, one end of the stirring paddles 6 that adheres to the inner wall of the sand mixing drum 1 is connected with a scraper 7, the height of the scraper 7 is higher than that of the stirring paddles 6, and the scraper 7 is in a state of adhesion with the inner side wall of the sand mixing drum 1; a dust cover 28 is arranged at the upper end of the sand mixing drum 1, an avoiding groove is formed in the dust cover 28 corresponding to the transmission mechanism 22, and a handle 29 is connected to the periphery of the dust cover 28. In turn, the dust cover 28 can prevent dust generated during the sand mixing process from leaking out, protecting the working environment and the health of the workers. An observation window 30 is formed in the top of the dust cover 28. In turn, workers can observe the sand mixing situation in the sand mixing drum 1 in real time, and then adjust the abnormal situation in the work in time.

[0032] As shown in Figure 1 and Figure 2 two groups of cleaning devices are symmetrically connected to the top of the sand mixing drum 1, and the cleaning devices correspond to the grinding ring 8; the cleaning device includes a cleaning roller 21 and a transmission mechanism 22, the transmission mechanism 22 is detachably connected to the top of the sand mixing drum 1, the top of the cleaning roller 21 is connected to the transmission mechanism 22, the cleaning roller 21 is composed of stainless steel wire, a first driving motor 23 is connected to the bottom of the transmission mechanism 22 to drive the transmission mechanism 22 to operate. In turn, starting the first driving motor 23 drives the transmission mechanism 22 to operate, so that the cleaning roller 21 starts to rotate, and then the cleaning roller 21 rotates at the position corresponding to the grinding ring 8, which can remove the sand particles that may be attached to the grinding ring 8, avoiding the accumulation of materials on the grinding ring 8 due to long-time work.

[0033] As shown in Figure 3The rotating shaft 5 is also symmetrically connected with two groups of grinding rings 8, the grinding rings 8 are rotationally connected with connecting blocks 9, the rotating shaft 5 is connected with a connecting plate 10 corresponding to the connecting blocks 9, the top of the connecting block 9 is connected with a guide rod 12, the connecting plate 10 is provided with a guide groove 13 corresponding to the guide rod 12, and a reset spring 14 is connected between the connecting block 9 and the connecting plate 10; the upper end of the connecting plate 10 is connected with a flange plate 11, and the connecting plate 10 is detachably connected with the rotating shaft 5 through the flange plate 11. Further, the driving mechanism 3 is started, and the driving mechanism 3 drives the two groups of stirring paddles 6 and scraping blades 7 symmetrically connected thereon to start working. Further, the center sand of the sand mixing drum 1 moves downward, the sand at the bottom of the sand mixing drum 1 moves in a centrifugal manner, and the sand at the edge of the sand mixing drum 1 moves in a lifting manner, so that the sand can reciprocatingly overturn, the stirring paddle 6 is in a state of adhesion with the inner bottom wall of the sand mixing drum 1, and the scraping blade 7 is in a state of adhesion with the inner side wall of the sand mixing drum 1, so that the sand is scraped from the bottom and the side wall of the inner container, and the sand can be fully stirred to avoid accumulation of the sand. At the same time, the grinding ring 8 is also pressed and rubbed under the action of the connecting block 9 and the reset spring 14, the grinding ring 8 can freely ascend and descend with the change of the thickness of the sand layer, the reset spring 14 can make the grinding ring 8 better adapt to sand layers with different hardness and thickness, ensure uniformity of the pressing effect, reduce the reaction force of the grinding ring from the sand layer, avoid damage of the grinding ring due to excessive stress, and simultaneously reduce vibration and improve sand mixing efficiency.

[0034] As shown in the drawings, Figure 4 The bottom of the sand mixing drum 1 is connected with a discharging pipe 15, the bottom of the sand mixing drum 1 is provided with a discharging hole 16 corresponding to the discharging pipe 15, a blocking plate 17 is slidably connected in the discharging hole 16, the side edge of the blocking plate 17 is connected with a connecting lug 18, the sand mixing drum 1 is connected with a fixing lug 19 corresponding to the connecting lug 18, and a positioning pin 20 is penetratingly connected on the fixing lug 19 and the connecting lug 18. A threaded blade 24 is longitudinally arranged in the discharging pipe 15, a second driving motor 25 drives the threaded blade 24 to rotate in the discharging pipe 15, the second driving motor 25 is connected at the bottom of the discharging pipe 15, a partition plate 26 is arranged between the second driving motor 25 and the threaded blade 24, the partition plate 26 is fixedly connected with the discharging pipe 15, and a discharging groove 27 is formed in one side of the top of the partition plate 26. When the sand mixing reaches a predetermined requirement, the driving mechanism 3 is closed, the positioning pin 20 is pulled out, the blocking plate 17 is slid under manual operation, the discharging hole 16 is opened, and then the second driving motor 25 is started, the threaded blade 24 is driven to rotate in the discharging pipe 15, and the rotation of the threaded blade 24 conveys the mixed sand from the bottom of the sand mixing drum 1 to the discharging pipe 15 and the discharging groove 27, and finally discharges. The upper end of the partition plate 26 is arranged in an inclined manner. It is beneficial to the smooth discharge of the sand and reduces the residue.

[0035] The working process of the utility model is:

[0036] Firstly, the driving mechanism 3 is started, and the driving mechanism 3 drives the two groups of stirring paddles 6 and scraping blades 7 symmetrically connected thereon to work through the driving shaft 4. Then the center sand of the sand mixing drum 1 moves downward, the sand at the bottom of the sand mixing drum 1 moves centrifugally, and the sand at the edge of the sand mixing drum 1 moves upward, so that the sand can reciprocatingly overturn, the stirring paddles 6 are in a state of adhesion with the inner bottom wall of the sand mixing drum 1, and the scraping blades 7 are in a state of adhesion with the inner side wall of the sand mixing drum 1, so as to scrape the sand from the bottom and the side wall of the inner container, ensuring that the sand can be fully stirred and avoiding accumulation of the sand. At the same time, the grinding ring 8 also performs grinding and rubbing on the sand mixture under the action of the connecting block 9 and the reset spring 14. The grinding ring 8 can freely ascend and descend with the change of the thickness of the sand layer, and the presence of the reset spring 14 enables the grinding ring 8 to better adapt to sand layers of different hardness and thickness, ensuring uniform grinding effect, reducing the reaction force of the grinding ring from the sand layer, avoiding damage of the grinding ring due to excessive stress, reducing vibration, and improving sand mixing efficiency. The stirring paddles 6 and the grinding ring 8 work together, the stirring paddles 6 continuously stir the sand mixture in the sand mixing drum 1 to make it preliminarily mixed and uniform, and the grinding ring 8 performs grinding and rubbing on the sand mixture under the action of the connecting block 9 and the reset spring 14, further improving the mixing uniformity.

[0037] At the same time, the first driving motor 23 is started to drive the transmission mechanism 22 to operate, so that the cleaning roller 21 starts to rotate, and then the cleaning roller 21 rotates at the position corresponding to the grinding ring 8, so as to remove the sand particles that may be attached to the grinding ring 8, avoiding material accumulation on the grinding ring 8 due to long-time work.

[0038] When the sand mixing reaches the predetermined requirement, the driving mechanism 3 is turned off, the positioning pin 20 is pulled out, the blocking plate 17 is slid under manual operation, the discharging hole 16 is opened, and then the second driving motor 25 is started to drive the threaded blade to rotate in the discharging pipe 15. The rotation of the threaded blade transports the mixed sand from the bottom of the sand mixing drum 1 to the discharging pipe 15 and the discharging chute 27, and finally discharges.

Claims

1. A double drum sand muller for foundry use comprising a muller drum (1), characterized in that, The bottom of the sand mixing barrel (1) is uniformly connected with a plurality of supporting legs (2), the lower end of the sand mixing barrel (1) is connected with a driving mechanism (3), the driving shaft (4) of the driving mechanism (3) is rotationally connected with the bottom wall of the sand mixing barrel (1), a rotating shaft (5) is connected with the driving shaft (4), two groups of stirring paddles (6) are symmetrically connected with the rotating shaft (5), the stirring paddles (6) are in abutting state with the inner bottom wall of the sand mixing barrel (1), the stirring paddles (6) are obliquely arranged, one end of the stirring paddles (6) abutting the inner wall of the sand mixing barrel (1) is connected with a scraping blade (7), the height of the scraping blade (7) is higher than that of the stirring paddles (6), and the scraping blade (7) is in abutting state with the inner wall of the sand mixing barrel (1). Two groups of grinding rings (8) are also symmetrically connected with the rotating shaft (5), the grinding rings (8) are rotationally connected with connecting blocks (9), the connecting blocks (9) are connected with the rotating shaft (5), the connecting blocks (9) are connected with connecting plates (10), the top of the connecting block (9) is connected with a guide rod (12), the connecting plate (10) is provided with a guide groove (13) corresponding to the guide rod (12), and the connecting block (9) and the connecting plate (10) are connected with a reset spring (14). The top of the sand mixing barrel (1) is symmetrically connected with two groups of cleaning devices, the cleaning devices correspond to the grinding rings (8); the bottom of the sand mixing barrel (1) is connected with a discharging pipe (15), the bottom of the sand mixing barrel (1) is provided with a discharging hole (16) corresponding to the discharging pipe (15), a material blocking plate (17) is slidably connected in the discharging hole (16), the side edge of the material blocking plate (17) is connected with a connecting lug (18), the sand mixing barrel (1) is connected with a fixing lug (19) corresponding to the connecting lug (18), and a positioning pin (20) is penetratingly connected with the fixing lug (19) and the connecting lug (18).

2. A double drum sand muller for foundry use according to claim 1, wherein The cleaning device comprises a cleaning roller (21) and a transmission mechanism (22), the transmission mechanism (22) is detachably connected to the top of the sand mixing barrel (1), the top of the cleaning roller (21) is connected with the transmission mechanism (22), the cleaning roller (21) is composed of stainless steel wire, a first driving motor (23) is connected to the bottom of the transmission mechanism (22) to drive the transmission mechanism (22) to operate.

3. The double drum sand muller for casting according to claim 1, wherein A threaded blade (24) is longitudinally arranged in the discharging pipe (15), a second driving motor (25) drives the threaded blade (24) to rotate in the discharging pipe (15), the second driving motor (25) is connected to the bottom of the discharging pipe (15), a partition plate (26) is arranged between the second driving motor (25) and the threaded blade (24), the partition plate (26) is fixedly connected with the discharging pipe (15), and a discharging groove (27) is formed in one side of the top of the partition plate (26).

4. A double drum sand muller for casting according to claim 3, wherein The upper end of the partition plate (26) is obliquely arranged.

5. The double drum sand muller for casting according to claim 1, wherein The upper end of the connecting plate (10) is connected with a flange plate (11), and the connecting plate (10) is detachably connected with the rotating shaft (5) through the flange plate (11).

6. A double drum sand muller for foundry use according to claim 2, wherein The upper end of the sand mixing barrel (1) is provided with a dust cover (28), the dust cover (28) is provided with a avoiding slot corresponding to the transmission mechanism (22), and the circumferential side of the dust cover (28) is connected with a handle (29).

7. A double drum sand muller for foundry use according to claim 6, wherein The top of the dust cover (28) is provided with an observation window (30).

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