Sand screening device for sand mixer

Abstract

The utility model discloses a sand screening device for a sand mixer, which relates to the technical field of casting equipment and comprises a screening box, a material guide barrel arranged at the bottom end of the screening box, a discharge pipe arranged at the bottom end of the material guide barrel, a feed pipe arranged at the top end of the screening box in a penetrating manner, an impurity collecting box arranged on one side of the screening box and a screening plate arranged in the screening box. A vibration mechanism is arranged at the bottom end of the sieve plate, buffering mechanisms are arranged at the two ends of the sieve plate, and a lifting mechanism is arranged at the top end of one buffering mechanism in a penetrating mode. According to the sand screening device, the guide barrel, the feeding pipe, the impurity collecting box, the screening plate, the vibrating mechanism, the buffering mechanism and the lifting mechanism are arranged in a matched mode, so that mixed sand is rapidly and sufficiently screened, meanwhile, it is guaranteed that screened impurities are effectively collected, the sand screening efficiency is prevented from being affected, and the sand screening quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of casting equipment, and specifically, to a sand screening device for a sand mixer. Background Art

[0002] Molding sand, as an essential basic material in the casting process, is mainly composed of carefully proportioned selected casting sand, special binders, and auxiliary additives; especially in applications that require higher refractoriness and better collapsibility, water glass is often used as the binder in molding sand, which has better high-temperature strength and air permeability, and is widely applicable to precision casting of metals such as cast iron and cast steel; among them, the quality of molding sand is crucial for the casting product, especially the sand screening process is regarded as the quality control key point in the casting process, which is directly related to the final quality of the casting; to ensure the quality of sand screening, special sand screening equipment is usually required for sand screening, and this sand screening equipment is the cornerstone of ensuring the quality of molding sand and plays an important role in improving the quality of castings.

[0003] For example, Chinese Patent CN210387437U discloses a sand screening device for a sand mixer, which includes a base, a screening box, an upper screen, a lower screen, a first discharge port, a second discharge port, and a vibration mechanism. By driving a cam to rotate with a motor, the upper push plate and the lower push plate respectively pressed against the upper and lower parts of the cam move up and down reciprocally, thereby driving the upper screen and the lower screen to vibrate, accelerating the screening efficiency of the molding sand and reducing the blockage of the screen holes by sand grains. However, during the sand screening process of the above sand screening device, since the screen is placed horizontally and the screen plate is driven to vibrate by the rotation of the cam for sand screening, the impurities screened out on the screen are not easily concentrated and discharged out of the screening box through the discharge port, resulting in more and more impurities accumulating above the screen, and further leading to a significant reduction in the sand screening efficiency.

[0004] In view of the problems in the related art, no effective solution has been proposed yet. Summary of the Utility Model

[0005] In view of the problems in the related art, the utility model provides a sand screening device for a sand mixer to overcome the above technical problems existing in the related art.

[0006] For this purpose, the specific technical solution adopted by the utility model is as follows:

[0007] A sand screening device for a sand mixer includes a screening box, a guide tube is arranged at the bottom end of the screening box, a discharge pipe is arranged at the bottom end of the guide tube, a feed pipe is inserted through the top end of the screening box, an impurity collection box is arranged on one side of the screening box, a screen plate is arranged inside the screening box, a vibration mechanism is arranged at the bottom end of the screen plate, buffer mechanisms are arranged at both ends of the screen plate, and a lifting mechanism is inserted through the top end of a set of buffer mechanisms; the impurity collection box is communicated with the screening box through a material hole matched with a spring frame.

[0008] Furthermore, in order to improve the sand screening efficiency, under the rotation of the output shaft of the first motor, the two connected cams can rotate, so that the sieve plate can vibrate under the action of the cams, and then quickly screen out impurities from the sand mixture on the sieve plate, improving the sand screening efficiency. The vibration mechanism includes connecting plates symmetrically arranged in the middle of the bottom end of the sieve plate. A connecting groove is formed on one side of the connecting plate, and a first motor is arranged inside the connecting groove. Both ends of the first motor are connected with cams. The buffer mechanism includes a spring rack arranged at the end of the sieve plate. The inner wall of the spring rack and the sieve plate are connected by a plurality of springs, and an elastic sleeve is arranged outside the springs.

[0009] Furthermore, in order to collect the separated impurities and avoid affecting the sand screening efficiency, under the rotation of the output shaft of the second motor, the threaded rod can be driven to rotate, so that a group of spring racks located outside the threaded rod move upward, thereby driving one end of the sieve plate connected thereto to move upward, and then the sieve plate can be adjusted to an appropriate inclination angle for sand screening. At the same time, the screened impurities are recovered into the impurity collection box through inclined vibration, avoiding staying on the sieve plate all the time and affecting the sand screening efficiency. The lifting mechanism includes threaded rods symmetrically inserted into the top ends of a group of spring racks, and a second motor is arranged at the top end of the threaded rod.

[0010] Furthermore, in order to centrally discharge the filtered sand mixture, under the action of the conical structure of the guide cylinder, the filtered sand mixture can fall centrally along the inclined plane into the discharge pipe, thereby realizing the centralized discharge of the filtered sand mixture. The guide cylinder is of a conical structure.

[0011] Furthermore, in order to extend the residence time of the sand mixture on the sieve plate and avoid waste caused by insufficient screening of the sand mixture, under the action of the wavy cross-section of the sieve plate, the sand mixture on the sieve plate will not quickly fall into the impurity collection box due to the inclination of the sieve plate. Due to the wavy obstacle, the moving speed of the sand mixture on the sieve plate is slowed down, and then a more sufficient screening effect is ensured. The cross-section of the sieve plate is of a wavy structure.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. Through the coordinated setting of the guide cylinder, feed pipe, impurity collection box, sieve plate, vibration mechanism, buffer mechanism and lifting mechanism, the present utility model realizes rapid and sufficient sand screening of the sand mixture, and at the same time effectively collects the screened impurities, thereby avoiding affecting the sand screening efficiency and ensuring the sand screening quality.

[0014] 2. Through the coordinated setting of the vibration mechanism and the buffer mechanism, under the rotation of the output shaft of the first motor, the two connected cams can rotate, so that the sieve plate can vibrate under the action of the cams, and then quickly screen out impurities from the sand mixture on the sieve plate, improving the sand screening efficiency.

[0015] 3. By setting up a lifting mechanism, under the rotation of the output shaft of the second motor, the threaded rod can be driven to rotate, causing a set of spring frames located outside the threaded rod to move upward, thereby driving one end of the sieve plate connected to it to move upward. Furthermore, the sieve plate can be adjusted to an appropriate inclination angle for sand screening, and at the same time, the screened impurities can be recovered into the impurity collection box through inclined vibration, avoiding staying on the sieve plate all the time and affecting the sand screening efficiency. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is a schematic structural diagram of a sand screening device for a sand mixer according to an embodiment of the present invention;

[0018] Figure 2 is a cross-sectional view of a sand screening device for a sand mixer according to an embodiment of the present invention;

[0019] Figure 3 is one of the partial schematic diagrams of a sand screening device for a sand mixer according to an embodiment of the present invention;

[0020] Figure 4 is the second of the partial schematic diagrams of a sand screening device for a sand mixer according to an embodiment of the present invention;

[0021] Figure 5 is a partial three-dimensional assembly diagram of a sand screening device for a sand mixer according to an embodiment of the present invention;

[0022] Figure 6 is the third of the partial schematic diagrams of a sand screening device for a sand mixer according to an embodiment of the present invention.

[0023] In the figure:

[0024] 1. Sieve box; 2. Feeding guide tube; 3. Discharge pipe; 4. Feeding pipe; 5. Impurity collection box; 501. Material hole; 6. Sieve plate; 7. Vibration mechanism; 701. Connecting plate; 702. Connecting groove; 703. First motor; 704. Cam; 8. Buffer mechanism; 801. Spring frame; 802. Spring; 803. Elastic sleeve; 9. Lifting mechanism; 901. Threaded rod; 902. Second motor. Detailed Embodiment

[0025] To further illustrate each embodiment, the present utility model provides attached drawings, which are part of the disclosure of the present utility model. They are mainly used to illustrate the embodiments and can be combined with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible embodiments and the advantages of the present utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0026] According to an embodiment of the present utility model, a sand screening device for a sand mixer is provided.

[0027] Now, the present utility model will be further described in conjunction with the attached drawings and specific embodiments. As Figure 1-6 shown, the sand screening device for a sand mixer according to an embodiment of the present utility model includes a screening box 1. A material guiding cylinder 2 is provided at the bottom end of the screening box 1. A discharge pipe 3 is provided at the bottom end of the material guiding cylinder 2. A feed pipe 4 is inserted through the top end of the screening box 1. An impurity collection box 5 is provided on one side of the screening box 1. A sieve plate 6 is provided inside the screening box 1. A vibration mechanism 7 is provided at the bottom end of the sieve plate 6. Buffer mechanisms 8 are provided at both ends of the sieve plate 6. A lifting mechanism 9 is inserted through the top end of a set of buffer mechanisms 8. The impurity collection box 5 is communicated with the screening box 1 through a material hole 501 that cooperates with a spring bracket 801.

[0028] By means of the above technical solution of the present utility model, through the cooperative setting of the material guiding cylinder 2, the feed pipe 4, the impurity collection box 5, the sieve plate 6, the vibration mechanism 7, the buffer mechanism 8 and the lifting mechanism 9, the present utility model realizes rapid and sufficient sand screening for the mixed sand, and at the same time ensures effective collection of the screened impurities, thus avoiding affecting the sand screening efficiency and further ensuring the sand screening quality.

[0029] In one embodiment, for the above-mentioned vibration mechanism 7 and buffer mechanism 8, the vibration mechanism 7 includes connecting plates 701 symmetrically arranged at the middle part of the bottom end of the sieve plate 6. A connecting groove 702 is formed on one side of the connecting plate 701. A first motor 703 is arranged inside the connecting groove 702. Both ends of the first motor 703 are connected with cam 704. The buffer mechanism 8 includes a spring bracket 801 arranged at the end of the sieve plate 6. The inner wall of the spring bracket 801 is connected with the sieve plate 6 through a plurality of springs 802. An elastic sleeve 803 is arranged outside the spring 802. Under the rotation action of the output shaft of the first motor 703, the two connected cams 704 can rotate, so that the sieve plate 6 can vibrate under the action of the cam 704, and then the impurities in the mixed sand located on the sieve plate 6 can be quickly screened out, improving the sand screening efficiency.

[0030] In addition, it should be noted that in order to seal the spring 802 through the elastic sleeve 803, prevent sand mixing from entering the interior of the spring 802, and at the same time maintain the elastic effect of the spring 802 on the sieve plate 6, the above-mentioned elastic sleeve 803 is made of a flexible material.

[0031] Working principle of the vibration mechanism 7 and the buffer mechanism 8: By starting the first motor 703, under the rotation of the output shaft of the first motor 703, the two groups of cams 704 connected thereto rotate, so that the sieve plate 6 connected through the connecting plate 701 vibrates, thereby quickly screening out impurities from the sand mixture located on the sieve plate 6, improving the sand screening efficiency. At the same time, due to the elastic effect of a number of springs 802, excessive stress or damage to the sieve plate 6 or the entire device caused by vibration is prevented. In addition, the spring 802 is sealed through the elastic sleeve 803 to avoid the influence of sand mixing on the spring 802.

[0032] In one embodiment, for the above-mentioned lifting mechanism 9, the lifting mechanism 9 includes threaded rods 901 symmetrically inserted through the top ends of a group of spring brackets 801, and the top ends of the threaded rods 901 are provided with a second motor 902; under the rotation of the output shaft of the second motor 902, the threaded rods 901 can be driven to rotate, so that a group of spring brackets 801 located outside the threaded rods 901 move upward, thereby driving one end of the sieve plate 6 connected thereto to move upward, and further enabling the sieve plate 6 to be adjusted to an appropriate inclination angle for sand screening. At the same time, the screened impurities are recycled into the impurity collection box 5 through the inclined vibration, avoiding staying on the sieve plate 6 all the time and affecting the sand screening efficiency.

[0033] In addition, it should be noted that in order to ensure that under the inclined vibration of the sieve plate 6, the impurities can be recycled into the impurity collection box 5 through the material holes 501, and the impurities will not fall back into the interior of the sieve box 1 due to the influence of the vibration of the sieve plate 6 and affect the sand screening effect, the bottom edge of the above-mentioned material hole 501 should be flush with the top end of the sieve plate 6, and the part of the sieve box 1 located between the bottom end of the sieve plate 6 and the bottom end of the spring bracket 801 is made of a compressible flexible material.

[0034] Working principle of the lifting mechanism 9 and the impurity collection box 5: By starting the second motor 902, under the rotation of the output shaft of the second motor 902, the threaded rods 901 are driven to rotate, so that a group of spring brackets 801 located outside the threaded rods 901 move upward, thereby driving one end of the sieve plate 6 connected thereto to move upward, and further enabling the sieve plate 6 to be adjusted to an appropriate inclination angle for sand screening. At the same time, the screened impurities are recycled into the impurity collection box 5 through the material holes 501, avoiding staying on the sieve plate 6 all the time and affecting the sand screening efficiency.

[0035] In one embodiment, for the above-mentioned material guiding cylinder 2, the material guiding cylinder 2 is of a conical structure; under the action of the conical structure of the material guiding cylinder 2, the filtered sand mixture can fall down along the inclined plane and be concentrated into the discharge pipe 3, so as to realize the centralized discharge of the filtered sand mixture.

[0036] In one embodiment, for the above-mentioned sieve plate 6, the cross-section of the sieve plate 6 is of a wavy structure; under the action of the wavy cross-section of the sieve plate 6, the sand mixture on the sieve plate 6 will not quickly fall into the impurity collection box 5 due to the inclination of the sieve plate 6. Due to the wavy obstacles, the moving speed of the sand mixture on the sieve plate 6 will be slowed down, thereby ensuring a more sufficient screening effect.

[0037] In order to facilitate the understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in the actual process will be described in detail below.

[0038] In actual application, the sieve plate 6 is adjusted to a suitable inclination angle by adjusting the lifting mechanism 9, and then the discharge port of the sand mixer is connected to the feed pipe 4. At the same time, the vibration mechanism 7 is started and the screening of sand is carried out with the auxiliary action of the buffer mechanism 8. The screened sand mixture is concentrated and discharged through the discharge pipe 3 through the material guiding cylinder 2 for use, and the screened impurities are collected into the impurity collection box 5 under the inclined vibration of the sieve plate 6 for centralized treatment.

[0039] In summary, by means of the above technical solutions of the present invention, through the coordinated setting of the material guiding cylinder 2, the feed pipe 4, the impurity collection box 5, the sieve plate 6, the vibration mechanism 7, the buffer mechanism 8 and the lifting mechanism 9, the rapid and sufficient screening of the sand mixture is realized, and at the same time, the effective collection of the screened impurities is ensured, so as to avoid affecting the screening efficiency, and thus the screening quality is ensured; through the coordinated setting of the vibration mechanism 7 and the buffer mechanism 8, under the rotation of the output shaft of the first motor 703, the two connected cams 704 can be rotated, so that the sieve plate 6 can vibrate under the action of the cams 704, and then the impurities in the sand mixture located on the sieve plate 6 can be quickly screened out, improving the screening efficiency; by setting the lifting mechanism 9, under the rotation of the output shaft of the second motor 902, the threaded rod 901 can be driven to rotate, so that a set of spring frames 801 located outside the threaded rod 901 move upward, thereby driving one end of the sieve plate 6 connected thereto to move upward, so that the sieve plate 6 can be adjusted to a suitable inclination angle for screening sand, and at the same time, the screened impurities are recycled into the impurity collection box 5 through inclined vibration, avoiding staying on the sieve plate 6 all the time and affecting the screening efficiency.

[0040] In the present utility model, unless otherwise clearly specified or defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sand screening device for a muller, comprising a screening box (1), characterized in that, A material guiding cylinder (2) is arranged at the bottom end of the screen box (1), a discharge pipe (3) is arranged at the bottom end of the material guiding cylinder (2), a feed pipe (4) is inserted through the top end of the screen box (1), an impurity collection box (5) is arranged on one side of the screen box (1), a screen plate (6) is arranged inside the screen box (1), a vibration mechanism (7) is arranged at the bottom end of the screen plate (6), buffer mechanisms (8) are arranged at both ends of the screen plate (6), and a lifting mechanism (9) is inserted through the top ends of a group of the buffer mechanisms (8).

2. The sand screening device for a muller according to claim 1, characterized in that, The vibration mechanism (7) includes connecting plates (701) symmetrically arranged in the middle of the bottom end of the screen plate (6), a connecting groove (702) is formed on one side of the connecting plate (701), a first motor (703) is arranged inside the connecting groove (702), and cams (704) are connected to both ends of the first motor (703).

3. The sand screening device for a muller according to claim 1, characterized in that, The buffer mechanism (8) includes a spring frame (801) arranged at the end of the screen plate (6), a plurality of springs (802) are connected between the inner wall of the spring frame (801) and the screen plate (6), and an elastic sleeve (803) is arranged outside the springs (802).

4. The sand screening device for a muller according to claim 3, characterized in that, The lifting mechanism (9) includes threaded rods (901) symmetrically inserted through the top ends of a group of the spring frames (801), and a second motor (902) is arranged at the top end of the threaded rods (901).

5. The sand screening device for a muller according to claim 3, characterized in that, The impurity collection box (5) is communicated with the screen box (1) through a material hole (501) that cooperates with the spring frame (801).

6. The sand screening device for a muller according to claim 1, characterized in that, The material guiding cylinder (2) is of a conical structure.

7. The sand screening device for a muller according to claim 1, characterized in that, The cross section of the screen plate (6) is of a wavy structure.

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