Lost foam casting cyclone sand treatment equipment

Abstract

The invention provides evanescent mode casting cyclone sand treatment equipment, belongs to the technical field of evanescent mode sand treatment, and overcomes the technical defect of low sand treatment speed in the prior art. A cylindrical hollow sand suction barrel is arranged in the middle of the upper part of a cyclone treatment device, and the upper end of the sand suction barrel is communicated with a dust remover through a dust remover air pipe; the input end of one cyclone processor is connected with one sand suction hopper through a suction pipe, and the output end of the lower part of the cyclone processor is communicated with the input end of the other cyclone processor through the other sand suction hopper and the suction pipe. Sand grains and sand ash can be separated, so that the working efficiency of evanescent mode sand treatment is improved; a communicating pipe is arranged, so that cold air can be sucked in, and the cooling speed of the cyclone sand is further increased; the joint of the spiral pipe and the pipe opening is in an involute shape, cyclone is formed, sand suction is facilitated, and the quality of reused mold sand is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of lost foam sand processing, and in particular relates to a lost foam casting cyclone sand processing device. Background Art

[0002] Lost foam casting is a new casting method that combines paraffin or foam models with similar size and shape to the casting into a model cluster, brushes refractory coating and dries it, buries it in dry quartz sand for vibration molding, pours it under negative pressure, vaporizes the model, and the liquid metal occupies the position of the model, solidifies and cools to form a casting. This process does not require mold removal, no parting surface, no sand core, so the casting has no flash, burrs and draft angle, and reduces the dimensional error caused by the core combination. Therefore, in the past 20 years, the lost foam casting technology has developed rapidly worldwide. The important material needed in the lost foam casting process is the pearl sand.

[0003] However, in the prior art, the sand box is simply placed directly on the vibrating screen and opened, the pearl sand is leaked to the discharge port of the vibrating screen, and the castings are manually collected. The temperature of the collected pearl sand is high and not conducive to storage, and the collected pearl sand contains more impurities.

[0004] In Chinese patent literature, there is a patent document with publication number CN 214079103 U, entitled "An Energy-Saving Lost Foam Sand Processing Equipment", which solves the above problems. The utility model relates to an energy-saving lost foam sand processing equipment, comprising a screen, a vibrating screen, a first lifting mechanism, a storage cylinder, a drum radiator, a cooling mechanism, a second lifting mechanism and a sand storage box, wherein the vibrating screen is connected below the screen, the vibrating screen has a gem sand discharge port and an impurity discharge port, the impurity discharge port is connected to the impurity collecting mechanism, the gem sand discharge port is connected to the first lifting mechanism, the output end of the first lifting mechanism is connected to the storage cylinder, the output end of the storage cylinder is connected to a conveying pipe, the conveying pipe is connected to one of the bottom surfaces of the drum radiator, the other bottom surface of the drum radiator has a discharge port, the discharge port is connected to the input end of the second lifting mechanism, the output end of the second lifting mechanism is connected to the sand storage box, a sand storage pipe is connected below the sand storage box, and a sealing plate is provided at the bottom of the sand storage pipe, wherein the drum radiator is rotatably arranged, and the cooling mechanism is used to cool the drum for heat dissipation.

[0005] However, the above patent documents use water for cooling, which has a slow cooling speed, makes it difficult to solve the pipeline sealing problem, and makes it difficult to separate the sand and ash. How to quickly cool the sand and ash and separate them is a technical problem that we urgently need to solve. Summary of the invention

[0006] The purpose of the present invention is to provide a lost foam casting cyclone sand processing equipment to solve the above technical problems existing in the prior art.

[0007] According to the above purpose, the technical solution of the present invention is: a lost foam casting cyclone sand processing equipment, including a physical cooling device, characterized in that: the physical cooling device is a cyclone processor, a cylindrical hollow sand suction bucket is provided in the middle of the upper part of the cyclone processor, the lower end of the sand suction bucket is buckled in the middle of the upper part of the cyclone processor, the upper end of the sand suction bucket is connected to the dust collector through the dust collector air duct, the input end of the cyclone processor is connected to the sand suction bucket through a suction pipe, the sand suction bucket is connected to the output pipe of the lower part of the vibrating screen, the upper part of the vibrating screen is equipped with a sand falling bucket, the lower output end of the cyclone processor is connected to the input end of another cyclone processor through another sand suction bucket and a suction pipe, the lower output end of the other cyclone processor is upwardly connected to the upper end of the sand storage through a bucket elevator, the lower part of the sand storage is connected to a screw conveyor, and the output port of the screw conveyor is connected to the inner cavity of the lost foam sand box installed on the three-dimensional vibration table.

[0008] Furthermore, the cyclone processor includes a main body installed on a bracket to form an inner cavity of a cone, the main body is provided with a spiral tube connected to the inner cavity of the cone, the spiral tube is connected to the suction straw through a pipe mouth, the lower end of the main body is provided with a sand outlet, and the inner cavity of the sand outlet is provided with a connecting tube connected to the upper surface of the spiral tube.

[0009] More specifically, there are multiple connecting pipes, and the multiple connecting openings on the surface of the spiral pipe are evenly distributed around the circumference of the spiral pipe in a fan shape.

[0010] More specifically, the vertical cross section of the spiral tube is in a hollow square shape, and the connection between the spiral tube and the tube opening is in an involute shape.

[0011] Furthermore, the two cyclone processors are arranged vertically side by side, and the dust collector air ducts on the tops are connected.

[0012] Furthermore, a butterfly valve is provided between the upper end of the sand suction bucket and the dust collector air duct.

[0013] Furthermore, the sand suction hopper includes a cube and a triangular block that are adjacent to each other, the bottom of the triangular block is higher than the bottom of the cube, a hollow sand storage chamber is provided in the cube, a hollow sand receiving chamber is provided in the triangular block, a square hole communicating with the sand storage chamber 31 is provided at the bottom of the sand receiving chamber, and blocking blocks are provided between the two sides of the square hole and the sand receiving chamber.

[0014] Furthermore, the sand falling hopper is in the shape of a flat quadrangular pyramid, and two quadrangular pyramid hollow chambers are provided inside the hopper, filtering strips are provided on the upper parts of the two hollow chambers, and sand discharge holes are provided at the bottoms of the two hollow chambers.

[0015] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0016] 1. The product of the present invention is equipped with a cyclone processor and a sand suction bucket, which can not only cool the molding sand, but also separate the sand particles and sand ash, thereby improving the working efficiency of the lost foam sand processing;

[0017] 2. The cyclone processor of the product of the present invention is provided with a connecting pipe, which can inhale cold air and further improve the cooling speed of the cyclone sand;

[0018] 3. The connection between the spiral tube and the tube mouth of the product of the present invention is in an involute shape, forming a whirlwind, which is convenient for the suction of sand and improves the quality of the reused molding sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the front side of the product of the present invention;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the reverse side of the product of the present invention;

[0021] Figure 3 It is a front view structural schematic diagram of the product of the present invention;

[0022] Figure 4 It is a schematic diagram of the top view of the structure of the product of the present invention;

[0023] Figure 5 It is a right side structural schematic diagram of the product of the present invention;

[0024] Figure 6 It is a front view structural schematic diagram of the cyclone processor of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the cyclone processor of the present invention when viewed from above;

[0026] Figure 8 It is a schematic diagram of the top view of the cyclone processor of the present invention;

[0027] Fig. 9 for Figure 8 AA cross-sectional structural diagram;

[0028] Fig.10 It is a three-dimensional structural schematic diagram of the sand suction hopper of the product of the present invention;

[0029] Fig.11 It is a schematic diagram of the top view of the sand suction hopper of the product of the present invention;

[0030] Fig.12 It is a front view structural schematic diagram of the sand dropping hopper of the product of the present invention;

[0031] Fig.13 It is a schematic diagram of the top view of the sand dropping hopper of the product of the present invention;

[0032] Fig.14 It is a rear view structural schematic diagram of the sand dropping hopper of the product of the present invention;

[0033] In the figure: 1. sand falling hopper; 2. vibrating screen; 3. sand suction hopper; 4. sand suction bucket; 5. cyclone processor; 6. dust collector air duct; 7. bucket elevator; 8. sand storage; 9. screw conveyor; 10. three-dimensional vibration table; 11. lost foam sand box; 12. butterfly valve; 31. sand storage chamber; 32. sand receiving chamber; 33. guide block; 51. inner cavity of cone; 52. spiral pipe; 53. pipe mouth; 54. connecting pipe; 55. sand outlet; 56. bracket; 101. corrugated bar; 102. sand discharge hole. DETAILED DESCRIPTION

[0034] Combination Figure 1-Figure 4 , is a schematic diagram of the principle structure of an embodiment of a lost foam casting cyclone sand processing equipment of the present invention, the lost foam casting cyclone sand processing equipment, including a physical cooling device, the physical cooling device is a cyclone processor 5, a cylindrical hollow sand suction bucket 4 is provided in the middle of the upper part of the cyclone processor 5, the lower end of the sand suction bucket 4 is buckled in the middle of the upper part of the cyclone processor 5, the upper end of the sand suction bucket 4 is connected to the dust collector through the dust collector air duct 6, a butterfly valve 12 is provided between the upper end of the sand suction bucket 4 and the dust collector air duct 6, the input end of the cyclone processor 5 is connected to the sand suction hopper 3 through a suction pipe, the sand suction hopper 3 includes a closely connected quadrilateral and a triangular block, the bottom of the triangular block is higher than the bottom of the quadrilateral, a hollow sand storage chamber 31 is provided in the quadrilateral, a hollow sand receiving chamber 32 is provided in the triangular block, and the bottom of the sand receiving chamber 32 is provided with a A square hole, a guide block 33 is provided between the two sides of the square hole and the sand receiving chamber 32, the sand suction hopper 3 is connected to the output pipe of the lower part of the vibrating screen 2, and a sand falling hopper 1 is installed on the upper part of the vibrating screen 2. The sand falling hopper 1 is in the shape of a flat quadrangular pyramid, and two quadrangular pyramid-shaped hollow chambers are provided therein, and filtering strips 101 are provided on the upper part of the two hollow chambers, and sand discharge holes 102 are provided at the bottom of the two hollow chambers. The lower output end of the cyclone processor 5 is connected to the input end of another cyclone processor 5 through another sand suction hopper 3 and a suction pipe. The two cyclone processors 5 are arranged vertically side by side, and the dust collector air duct 6 on the top is connected. The lower output end of the other cyclone processor 5 is connected to the upper end of the sand warehouse 8 through a bucket elevator 7. The lower part of the sand warehouse 8 is connected to a screw conveyor 9, and the output port of the screw conveyor 9 is connected to the inner cavity of the lost foam sand box 11 installed on the three-dimensional vibration table 10.

[0035] Preferably, the cyclone processor 5 includes a main body installed on a bracket 56 to form a conical inner cavity 51, the main body is provided with a spiral tube 52 connected to the conical inner cavity 51, the spiral tube 52 is connected to the straw through a pipe mouth 53, a sand outlet 55 is provided at the lower end of the main body, the sand outlet 55 is provided in the inner cavity with a connecting tube 54 connected to the upper surface of the spiral tube 52, specifically, 7 connecting tubes 54 are provided, and the multiple connecting ports on the surface of the spiral tube 52 are evenly distributed in a fan shape on the surface of the spiral tube 52; the vertical cross-section of the spiral tube 52 is a hollow square shape, and the connection between the spiral tube 52 and the pipe mouth 53 is in an involute shape.

[0036] When working, the function of the lost foam casting cyclone sand processing equipment is to physically cool down the buried box filling, remove impurities and recycle them. At present, the buried box materials used by manufacturers are mainly pearl sand, quartz sand, olive sand, etc. In the production process, the buried box sand is sucked out of the air in the sand box by a vacuum pump to harden the sand in the sand box under negative pressure (to achieve the purpose of molding), and then the molten steel is injected into the mold cavity through the gate. When the casting is cooled to the process temperature, the box is turned over. At this time, the temperature of the buried box sand exceeds 120℃, and locally exceeds 250℃. The buried box sand flows into the vibrating screen 2 through the sand falling hopper 1, and the large particles enter the material barrel through the screen composed of ribs 101 on the upper layer of the vibrating screen 2, and the buried box sand and fine dust enter the sand suction hopper 3. The first-stage cyclone sucks the buried sand and dust in the sand suction hopper 3 into the barrel of the cyclone processor 5. The buried sand falls into the inner cavity 51 of the cone inside the cyclone cone after cyclone processing. The sand outlet 55 at the bottom of the inner cavity 51 of the cone flows into the second-stage sand suction hopper 3 through a pipeline, and the fine dust enters the dust collector air duct 6 through the cyclone outlet pipeline. At this time, the sand temperature of the second-stage sand suction hopper 3 does not meet the requirements for reuse. The second-stage cyclone sucks the sand in the sand suction hopper 3 again into another cyclone processor 5 for further processing. At this time, the clean sand that has been processed and the temperature reaches room temperature flows into the bucket elevator 7 through the pipeline. The bucket elevator 7 lifts the sand to the sand storage 8 for storage. The operator transports the sand to the lost foam sand box 11 on the three-dimensional vibration table 10 through the screw conveyor 9 at the bottom of the sand storage 8, and packs it into the box for pouring again, and the cycle is repeated.

[0037] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0038] Although the following terms are used more frequently in this article: 1. sand drop bucket; 2. vibrating screen; 3. sand suction bucket; 4. sand suction bucket; 5. cyclone processor; 6. dust collector air duct; 7. bucket elevator; 8. sand storage; 9. screw conveyor; 10. three-dimensional vibration table; 11. lost foam sand box; 12. butterfly valve; 31. sand storage chamber; 32. sand receiving chamber; 33. guide block; 51. cone inner cavity; 52. spiral tube; 53. pipe mouth; 54. connecting pipe; 55. sand outlet; 56. bracket; 101. rib; 102. sand discharge hole, etc., the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

[0039] The above is an introduction to the lost foam casting cyclone sand processing equipment provided by the present invention. The introduction uses specific preferred embodiments to illustrate the principles and implementation methods of the present invention. These embodiments are only used to help understand the principles and core ideas of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the design ideas of the present invention, the implementation plans in the above embodiments can be further combined or replaced, and the present invention can be improved and modified in several ways. These improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A lost foam casting cyclone sand processing equipment, including a physical cooling device, characterized in that: The physical cooling device is a cyclone processor (5), wherein a cylindrical hollow sand suction bucket (4) is provided in the middle of the upper part of the cyclone processor (5), the lower end of the sand suction bucket (4) is buckled in the middle of the upper part of the cyclone processor (5), the upper end of the sand suction bucket (4) is connected to the dust collector through a dust collector air duct (6), the input end of the cyclone processor (5) is connected to the sand suction hopper (3) through a suction pipe, the sand suction hopper (3) is connected to the output pipe of the lower part of the vibrating screen (2), and the vibrating screen (2) is connected to the sand suction hopper (3). A sand dropping hopper (1) is installed at the upper part, the lower output end of the cyclone processor (5) is connected to the input end of another cyclone processor (5) through another sand suction hopper (3) and a suction pipe, and the lower output end of the other cyclone processor (5) is upwardly connected to the upper end of a sand storage (8) through a bucket elevator (7), and a screw conveyor (9) is connected to the lower part of the sand storage (8), and the output port of the screw conveyor (9) is connected to the inner cavity of a lost foam sand box (11) installed on a three-dimensional vibration table (10).

2. The cyclone sand processing equipment for lost foam casting according to claim 1 is characterized in that: The cyclone processor (5) comprises a body mounted on a bracket (56) to form a conical inner cavity (51); the body is provided with a spiral tube (52) connected to the conical inner cavity (51); the spiral tube (52) is connected to a suction tube through a tube opening (53); a sand outlet (55) is provided at the lower end of the body; a connecting tube (54) connected to the upper surface of the spiral tube (52) is provided in the inner cavity of the sand outlet (55).

3. The cyclone sand processing equipment for lost foam casting according to claim 2 is characterized in that: There are a plurality of connecting pipes (54), and a plurality of connecting openings on the surface of the spiral pipe (52) are evenly distributed in a fan-shaped circle on the surface of the spiral pipe (52).

4. The cyclone sand processing equipment for lost foam casting according to claim 2 is characterized in that: The vertical cross section of the spiral tube (52) is in a hollow square shape, and the connection between the spiral tube (52) and the tube opening (53) is in an involute shape.

5. The cyclone sand processing equipment for lost foam casting according to claim 1 is characterized in that: The two cyclone processors (5) are arranged vertically side by side, and the dust collector air ducts (6) on the tops thereof are connected.

6. The cyclone sand processing equipment for lost foam casting according to claim 1 is characterized in that: A butterfly valve (12) is provided between the upper end of the sand suction bucket (4) and the dust collector air duct (6).

7. The cyclone sand processing equipment for lost foam casting according to claim 1 is characterized in that: The sand suction hopper (3) comprises a square body and a triangular block which are adjacent to each other, the bottom of the triangular block is higher than the bottom of the square body, a hollow sand storage chamber (31) is arranged in the square body, a hollow sand receiving chamber (32) is arranged in the triangular block, a square hole which is in communication with the sand storage chamber (31) is arranged at the bottom of the sand receiving chamber (32), and guide blocks (33) are arranged between the two sides of the square hole and the sand receiving chamber (32).

8. The cyclone sand processing equipment for lost foam casting according to claim 1 is characterized in that: The sand dropping hopper (1) is in the shape of a flat quadrangular pyramid, and is provided with two quadrangular pyramid hollow chambers symmetrically arranged on the inside. The upper parts of the two hollow chambers are provided with filtering strips (101), and the bottoms of the two hollow chambers are provided with sand discharge holes (102).

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