A stirring and feeding and vibrating device

Abstract

The present application relates to a kind of stirring and vibrating device of feeding, including sand storage barrel, also including sequentially arranged from top to bottom weighing mechanism, stirring mechanism, screening mechanism, the discharge end of the sand storage barrel is communicated with the feed inlet of the weighing mechanism by first feeding machine, the discharge end of the weighing mechanism is communicated with the feed inlet of the stirring mechanism, the discharge end of the stirring mechanism is communicated with the feed inlet of the screening mechanism, the stirring mechanism includes stirring barrel, stirring rod is coaxially arranged in the stirring barrel, stirring blade is arranged on the stirring rod, the upper end of the stirring barrel is provided with first motor for rotating stirring rod.The present application provides a kind of premixing mode of weighing first, then stirring, finally vibrating screening, through stirring process, sand agglomerates can be broken, realize the direct reuse of sand agglomerates, reduce the workload of sand agglomerates collection, also reduce the workload of subsequent processing and reuse of sand agglomerates.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sand type 3D printing premixing equipment, and particularly relates to a stirring and feeding and vibrating device. BACKGROUND

[0002] Sand type 3D printing is repeatedly printing a certain thickness of material on a platform, and the process is repeated until the entire formed piece is generated. In the sand type 3D printing occasion, the raw material used by the sand type 3D printing equipment is sand, and the sand is premixed in a sand mixing system before printing and mixed with a curing agent at a certain ratio, and then is transported to the main machine. When printing, the sand will quickly solidify and bond when encountering glue. In this way, under the alternation of a layer of glue and a layer of sand, the solid model will be "printed" into shape. After printing is completed, the model can be obtained by removing the loose powder. The sand is continuously premixed at a certain quantity at a certain time interval. In the existing sand raw material premixing device, the sand material in the material bin will have a certain sand agglomeration phenomenon due to various factors. Although the sand agglomeration can be filtered and removed by the vibrating and screening method, the sand material utilization rate is low every time the premixing is performed. The reason is that the sand agglomeration is not well utilized, which directly leads to the increase of the collection work amount of the sand agglomeration and indirectly leads to the increase of the subsequent processing and reusing work amount of the sand agglomeration, which is not conducive to the production of sand raw materials in the sand type 3D printing. SUMMARY

[0003] The purpose of the present application is to provide a premixing method of weighing first, stirring second and vibrating and screening last, and a sand raw material production device capable of breaking and directly reusing the sand agglomeration through the stirring process, aiming at the above problems. The specific technical scheme is as follows:

[0004] A stirring and feeding and vibrating device, comprising a sand storage barrel, and further comprising a weighing mechanism, a stirring mechanism and a screening mechanism arranged in sequence from top to bottom, wherein the discharge end of the sand storage barrel is communicated with the feeding end of the weighing mechanism through a first feeding machine, the discharge end of the weighing mechanism is communicated with the feeding end of the stirring mechanism, the discharge end of the stirring mechanism is communicated with the feeding end of the screening mechanism, the stirring mechanism comprises a stirring barrel, a stirring rod is coaxially arranged in the stirring barrel, stirring blades are arranged on the stirring rod, and a first motor for rotating the stirring rod is arranged at the upper end of the stirring barrel.

[0005] Preferably, the lower end of the sand storage barrel is provided with a sand storage barrel discharge port, the lower end of the first feeding machine is provided with a first feeding machine feeding port, and the sand storage barrel discharge port is sealingly connected with the first feeding machine feeding port.

[0006] Preferably, the upper middle part of the stirring barrel is cylindrical, the lower middle part of the stirring barrel is conical, the upper end of the stirring rod is coaxially connected with the upper end face of the stirring barrel through a bearing, the stirring blade is an arc-shaped stirring blade, and the arc-shaped stirring blade is located at the lower middle part of the stirring barrel and can overturn the raw materials while participating in the stirring and mixing.

[0007] Preferably, a plurality of arc-shaped stirring blades are arranged, and the plurality of arc-shaped stirring blades are uniformly distributed along the circumference of the stirring rod.

[0008] Preferably, the stirring rod is a hollow cylindrical pipe, and a plurality of sand inlets are arranged at the upper middle part of the stirring rod, and a plurality of sand outlets are arranged at the lower middle part of the stirring rod.

[0009] Preferably, the weighing mechanism comprises a material collecting and weighing barrel and a supporting rod for supporting the material collecting and weighing barrel, the upper end of the supporting rod is provided with a first parallel plate, the side surface of the material collecting and weighing barrel is provided with a second parallel plate located directly below the first parallel plate, a weighing sensor is connected between the first parallel plate and the second parallel plate, the upper end face of the material collecting and weighing barrel is provided with a first feeding inlet of the weighing barrel and a second feeding inlet of the weighing barrel, the first feeding inlet of the weighing barrel is in communication with the discharge end of the first feeding machine, the second feeding inlet of the weighing barrel is in communication with the solid reinforcing agent storage barrel through a second feeding machine, the lower end of the material collecting and weighing barrel is conical, and the lower end of the material collecting and weighing barrel is provided with a weighing barrel discharge pipe, and the weighing barrel discharge pipe is further provided with a first valve.

[0010] Preferably, the lower end of the solid reinforcing agent storage barrel is provided with a solid reinforcing agent storage barrel discharge port, the lower end of the second feeding machine is provided with a second feeding machine feeding port, and the solid reinforcing agent storage barrel discharge port is sealingly connected with the second feeding machine feeding port.

[0011] Preferably, the upper end face of the stirring barrel is provided with a first feeding inlet of the stirring barrel and a second feeding inlet of the stirring barrel, the lower end of the weighing barrel discharge pipe is located in the first feeding inlet of the stirring barrel, the second feeding inlet of the stirring barrel is connected with a liquid inlet pipe, the other end of the liquid inlet pipe is in communication with a liquid curing agent tank through a pump body, the lower end of the stirring barrel is provided with a stirring barrel discharge pipe, and the stirring barrel discharge pipe is further provided with a second valve.

[0012] Preferably, the screening mechanism comprises a circular vibrating screening machine, a first screening machine discharge pipe for discharging waste materials and a second screening machine discharge pipe for discharging qualified raw materials are arranged on the circular vibrating screening machine, a waste material recycling box is arranged at the first screening machine discharge pipe, a raw material buffer barrel is arranged at the second screening machine discharge pipe, a screening machine feed inlet is further arranged at the upper end of the circular vibrating screening machine, and the lower end of the stirring barrel discharge pipe is located inside the screening machine feed inlet. A cylindrical cloth cover is sleeved on the first screening machine discharge pipe, and the other end of the cylindrical cloth cover extends into the interior of the waste material recycling box.

[0013] Preferably, a valve assembly is further arranged at the first screening machine discharge pipe, the valve assembly comprises a door-shaped support frame, a first air cylinder is vertically arranged on the upper end surface of the door-shaped support frame, the cylinder body part of the first air cylinder is connected with the upper end surface of the door-shaped support frame, a baffle is connected with the piston rod end of the first air cylinder, the baffle is vertically arranged, and a rectangular opening matched with the baffle is arranged at the upper end surface of the first screening machine discharge pipe.

[0014] Preferably, a plurality of stirring teeth are further arranged on the middle and upper part of the stirring rod, a fixing rod is connected between the plurality of stirring teeth, a buffer assembly is vertically connected with the fixing rod, a scraper is connected with the end of the buffer assembly away from the fixing rod, the length direction of the scraper is arranged along the axis direction of the stirring barrel, a plurality of bristles are arranged on the scraper along the length direction of the scraper, the bristles are closely arranged with the inner wall of the middle and upper part of the stirring barrel, the buffer assembly comprises a buffer seat, the end of the buffer seat close to the stirring shaft is connected with the fixing rod, a buffer sliding cavity is arranged in the buffer seat, a buffer sliding block is arranged in the buffer sliding cavity, a buffer rod is arranged on the side of the buffer sliding block away from the fixing rod, the other end of the buffer rod penetrates through the side surface of the buffer seat and is connected with the scraper, and a buffer spring is arranged between the other side of the buffer sliding block and the buffer sliding cavity.

[0015] Preferably, a first buffer barrel inlet and a second buffer barrel inlet are arranged on the upper end surface of the raw material buffer barrel, the lower end of the stirring barrel discharge pipe is located inside the first buffer barrel inlet, the second buffer barrel inlet is communicated with a sand supplement barrel through a dragon conveyor, a sand supplement barrel discharge pipe is arranged at the lower end of the sand supplement barrel, the sand supplement barrel discharge pipe is communicated with the feeding end of the dragon conveyor, the discharging end of the dragon conveyor is located inside the second buffer barrel inlet, and a weighing instrument is arranged at the bottom of the waste material recycling box. The sand supplement barrel is used for supplementing sand to the raw material buffer barrel, so as to ensure the accuracy of the required mass of sand raw materials after each premixing.

[0016] Preferably, in order to further improve the accuracy of the required mass of sand raw materials after each premixing, that is, to ensure that the mass of sand raw materials after being weighed, stirred and screened and falling into the raw material buffer barrel tends to be the same as the mass when the sand raw materials are weighed, the pitch of the Longyou conveyor is x, the diameter of the helical blade is L, the inclination angle coefficient is c, the working time is T, and the bulk density of the sand raw materials is p, then the rotation speed of the helical shaft of the Longyou conveyor is N and the weight of the weighing instrument before and after each premixing should satisfy the following relationship:

[0017]

[0018] In the above formula, unit, kg; x, L unit, m; N unit, r / min; T unit, s; p unit, t / m 3 ; λ is the material filling coefficient, the value range is 0.32-0.34; c is 1 when horizontally conveying; a is the relationship coefficient and the value is 47.

[0019] Preferably, the present application further discloses a sand raw material production method of stirring and feeding and vibrating devices, and the specific steps comprise:

[0020] S1: the sand materials and the solid reinforcing agents are respectively conveyed into the material weighing barrel through the first feeding machine and the second feeding machine according to a certain proportion, and the conveying is stopped when the measured weight of the material weighing barrel reaches a preset threshold value;

[0021] S2: the first valve is opened, the sand materials and the solid reinforcing agents fall into the stirring barrel, and a certain proportion of the liquid curing agent is added into the stirring barrel while the sand materials and the solid reinforcing agents are stirred through the working of the first motor and the pump body, and the stirring is continued;

[0022] S3: during the stirring, the arc-shaped stirring blade can turn the mixture at the bottom of the stirring barrel up to the upper part of the stirring barrel when mixing and stirring, so as to ensure uniform stirring and mixing, and at the same time, the sand agglomerates can be broken;

[0023] S4: after the stirring is completed, the second valve is opened, and the mixture and the sand agglomerates that cannot be broken fall into the circular vibrating screening machine for vibrating screening;

[0024] S5: the valve assembly is in a closed state at the front segment and the middle segment during the working of the circular vibrating screening machine, the qualified sand raw materials fall into the raw material buffer barrel from the second discharge pipe of the screening machine after screening, and the valve assembly is in an open state at the rear segment, and the sundries and the sand agglomerates that are not broken fall into the waste recycling box through the first discharge pipe of the screening machine and the cylindrical cloth cover;

[0025] S6: Weigh the waste material falling into the waste recycling bin using a weighing instrument, and control the auger conveyor to replenish the raw material buffer bin with the same weight according to the corresponding weight.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The present invention provides a mixing and feeding device and a vibration device, which provides a premixing method of weighing first, mixing then vibrating and screening by setting a weighing mechanism, a mixing mechanism and a screening mechanism in layers from top to bottom. The mixing process can break up sand lumps, realize the direct reuse of sand lumps, reduce the workload of collecting sand lumps, and also reduce the workload of subsequent processing and reuse of sand lumps.

[0028] (2) The present invention provides a mixing and feeding device and a vibration device. By setting the mixing blades as arc-shaped mixing blades and placing the arc-shaped mixing blades in the middle and lower part of the mixing tank, the arc-shaped mixing blades can turn the raw materials up while participating in the mixing and mixing. They can turn the mixture at the bottom of the mixing tank up to the top of the mixing tank, further improving the uniformity of the mixing and mixing. The arc-shaped mixing blades can also break up sand lumps.

[0029] (3) The present invention provides a mixing, feeding, and vibrating device, which, by installing a valve assembly on the first discharge pipe of the circular vibrating screen, can prevent qualified sand from entering the screen.

[0030] During operation of the circular vibrating screen, the material is discharged from the first discharge pipe of the screen in the front and middle sections to prevent qualified sand raw materials from falling into the waste recycling bin and affecting the use of qualified sand raw materials.

[0031] (4) The present invention provides a mixing, feeding, and vibration device, which uses the pitch of the auger conveyor (x), the diameter of the spiral blade (L), the inclination coefficient (c), the working time (T), the bulk density of the sand raw material (p), the rotational speed of the auger conveyor (N), and the weight change of the weighing instrument before and after each premixing. The limitation between these parameters can further improve the accuracy of the required mass of sand raw materials after each premixing, that is, ensure that the mass of sand raw materials falling into the raw material buffer tank after weighing, stirring and sieving is close to the mass of sand raw materials when weighed. Attached Figure Description

[0032] Figure 1 is a front view schematic diagram of the present invention.

[0033] Figure 2 is a rear view schematic diagram of the present invention.

[0034] Figure 3 is a schematic diagram of the stirring mechanism of the present invention.

[0035] Figure 4 is a schematic diagram of the weighing mechanism structure of the present application.

[0036] Figure 5 is a schematic diagram of the valve assembly structure of the present application.

[0037] Figure: 1, sand storage barrel; 2, first feeding machine; 3, weighing mechanism; 31, material collecting and weighing barrel; 32, support rod; 33, first parallel plate; 34, second parallel plate; 35, weighing sensor; 36, first feeding port of weighing barrel; 37, second feeding port of weighing barrel; 38, discharge pipe of weighing barrel; 39, first valve; 4, stirring mechanism; 41, stirring barrel; 42, first feeding port of stirring barrel; 43, second feeding port of stirring barrel; 44, stirring rod; 45, first motor; 46, stirring blade; 47, stirring assembly; 471, stirring teeth; 472, fixed rod; 473, scraper; 474, brush; 48, buffer assembly; 49, discharge pipe of stirring barrel; 491, second valve; 5, screening mechanism; 51, circular vibrating screen; 52, first discharge pipe of screening machine; 53, second discharge pipe of screening machine; 54, feeding port of screening machine; 6, valve assembly; 61, door-shaped support frame; 62, first air cylinder; 63, baffle; 64, rectangular opening; 7, waste recovery box; 8, raw material buffer barrel; 81, first feeding port of buffer barrel; 82, second feeding port of buffer barrel; 83, discharge port of buffer barrel; 9, solid reinforcing agent storage barrel; 10, second feeding machine; 11, weighing instrument; 12, cylindrical cloth cover; 13, discharge port of sand storage barrel; 14, feeding port of first feeding machine; 15, discharge port of solid reinforcing agent storage barrel; 16, feeding port of second feeding machine. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application. Embodiment 1

[0039] As shown in Figures 1-5, a kind of stirring and vibrating device for feeding, including sand storage barrel 1,It also includes the weighing mechanism 3 from top to bottom in turn, stirring mechanism 4, screening mechanism 5, the discharge end of the sand storage barrel 1 is communicated with the feeding end of the weighing mechanism 3 by first feeding machine 2, the discharge end of the weighing mechanism 3 is communicated with the feeding end of the stirring mechanism 4, the discharge end of the stirring mechanism 4 is communicated with the feeding end of the screening mechanism 5, the stirring mechanism 4 includes stirring barrel 41, the coaxial stirring rod 44 is arranged in the stirring barrel 41, the stirring blade 46 is arranged on the stirring rod 44, the upper end of the stirring barrel 41 is provided with the first motor 45 for rotating the stirring rod 44.By from top to bottom layer arrangement weighing mechanism, stirring mechanism and screening mechanism, thereby providing a kind of pre-mixed way of weighing first, then stirring, finally vibrating screening, through the stirring process can be broken to sand agglomerates, realize the direct reuse of sand agglomerates, reduce the work load of sand agglomerates collection, also reduce the work load of subsequent processing and reuse of sand agglomerates, simultaneously, through the work of first motor, the rotation of stirring blade 46 can be driven, the arc-shaped stirring blade can make raw materials turn over while participating in stirring and mixing, can turn over the mixture at the bottom of stirring barrel to the upper part of stirring barrel, further improve the uniformity of stirring and mixing, the arc-shaped stirring blade can break sand agglomerates at the same time.

[0040] The lower end of the sand storage barrel 1 is provided with sand storage barrel discharge port 13, the lower end of the first feeding machine 2 is provided with first feeding machine feeding port 14, the sand storage barrel discharge port 13 is sealingly connected with the first feeding machine feeding port 14.

[0041] The middle upper part of the stirring barrel 41 is cylindrical, the middle lower part of the stirring barrel 41 is conical, the upper end of the stirring rod 44 is connected with the upper end face of the stirring barrel 41 coaxially through bearing, the stirring blade 46 is arc-shaped stirring blade, and the arc-shaped stirring blade is located at the middle lower part of the stirring barrel 41, the arc-shaped stirring blade can make raw materials turn over while participating in stirring and mixing.

[0042] The arc-shaped stirring blade is provided with a plurality of arc-shaped stirring blades, and the plurality of arc-shaped stirring blades are uniformly distributed along the circumference of the stirring rod 44.

[0043] The stirring rod 44 is hollow cylindrical pipe, and a plurality of sand inlets 441 are arranged in the middle upper part of the stirring rod 44, and a plurality of sand outlets 442 are arranged in the middle lower part of the stirring rod 44.Through the setting, the sand raw material located in the upper part of the stirring barrel can enter the inside of the pipe-shaped stirring rod through the sand inlet, and flow out from the lower part of the stirring rod, further improve the uniformity of stirring and mixing.

[0044] The weighing mechanism 3 comprises an aggregate weighing bucket 31 and a support rod 32 for supporting the aggregate weighing bucket, the upper end of the support rod 32 is provided with a first parallel plate 33, the side of the aggregate weighing bucket 31 is provided with a second parallel plate 34, the second parallel plate 34 is located directly below the first parallel plate 33, and a weighing sensor 35 is connected between the first parallel plate 33 and the second parallel plate 34, the upper end surface of the aggregate weighing bucket 31 is provided with a weighing bucket first feeding port 36 and a weighing bucket second feeding port 37, the weighing bucket first feeding port 36 is communicated with the discharge end of the first feeding machine 2, the weighing bucket second feeding port 37 is communicated with the solid reinforcing agent storage bucket 9 through the second feeding machine 10, the lower end of the aggregate weighing bucket 31 is conical, and the lower end of the aggregate weighing bucket is provided with a weighing bucket discharge pipe 38, and the weighing bucket discharge pipe 38 is also provided with a first valve 39. The support rod is provided with two, which are respectively located on the left and right sides of the aggregate weighing bucket 31, and the first parallel plate is provided with a weighing sensor 35, and the aggregate weighing bucket 31 is connected with the support rod through two weighing sensors.

[0045] The lower end of the solid reinforcing agent storage bucket 9 is provided with a solid reinforcing agent storage bucket discharge port 15, and the lower end of the second feeding machine 10 is provided with a second feeding machine feeding port 16, and the solid reinforcing agent storage bucket discharge port 15 is sealingly connected with the second feeding machine feeding port 16.

[0046] The upper end surface of the stirring barrel 41 is provided with a stirring barrel first feeding port 42 and a stirring barrel second feeding port 43, the lower end of the weighing bucket discharge pipe 38 is located in the stirring barrel first feeding port 42, the stirring barrel second feeding port 43 is connected with a liquid inlet pipe, the other end of the liquid inlet pipe is communicated with a liquid curing agent tank through a pump body (the curing agent will be cured only when it contacts the curing agent discharged by the printing head), the lower end of the stirring barrel 41 is provided with a stirring barrel discharge port 49, and the stirring barrel discharge pipe 49 is also provided with a second valve 491.

[0047] The screening mechanism 5 includes a circular vibrating screening machine 51, a screening machine first discharge pipe 52 for discharging waste materials and a screening machine second discharge pipe 53 for discharging qualified raw materials are arranged on the circular vibrating screening machine 51, a waste material recycling box 7 is arranged at the screening machine first discharge pipe 52, a raw material buffer bucket 8 is arranged at the screening machine second discharge pipe 53, a screening machine feeding port 54 is further arranged at the upper end of the circular vibrating screening machine 51, and the lower end of the stirring barrel discharge pipe 49 is located inside the screening machine feeding port 54. A cylindrical cloth cover 12 is sleeved on the screening machine first discharge pipe 52, and the other end of the cylindrical cloth cover 12 extends into the inside of the waste material recycling box 7.

[0048] The lower end of the raw material buffer bucket 8 is provided with a buffer bucket discharge port 83, the buffer bucket discharge port 83 realizes the conveying of sand raw materials through a feeding pump, and realizes the supply of 3D printing sand raw materials.

[0049] The screening machine first discharge pipe 52 is further provided with a valve assembly 6, the valve assembly includes a door-shaped support frame 61, a first air cylinder 62 is vertically arranged on the upper end surface of the door-shaped support frame 61, the cylinder body part of the first air cylinder 62 is connected with the upper end surface of the door-shaped support frame 61, a baffle 63 is connected with the piston rod end of the first air cylinder, the baffle 63 is vertically arranged, and a rectangular opening 64 matched with the baffle is arranged at the upper end surface of the screening machine first discharge pipe 52. The vertical movement of the baffle can be realized through the first air cylinder, when the baffle is at the low end, the screening machine first discharge pipe 52 is closed, and when the baffle is at the high end, the screening machine first discharge pipe 52 is opened. The valve assembly is in a closed state during the early and middle stages of the operation of the circular vibrating screening machine, the qualified sand raw materials fall into the raw material buffer bucket from the screening machine second discharge pipe after screening, the valve assembly is in an open state during the later stage, the sundries and unbroken sand lumps fall into the waste material recycling box through the screening machine first discharge pipe and the cylindrical cloth cover, which can prevent the qualified sand raw materials from being discharged from the screening machine first discharge pipe during the early and middle stages of the operation of the circular vibrating screening machine, and prevent the qualified sand raw materials from falling into the waste material recycling box to affect the use of the qualified sand raw materials.

[0050] The middle and upper part of the stirring rod 44 is also provided with a plurality of stirring teeth 471, and a fixing rod 472 is connected between the plurality of stirring teeth 471, a buffer assembly 48 is vertically connected to the fixing rod, a scraper 473 is connected to one end of the buffer assembly 48 away from the fixing rod, the length direction of the scraper 473 is arranged along the axis direction of the stirring barrel, a brush 474 is arranged on the scraper 473 along the length direction of the scraper 473, and the brush is closely arranged with the inner wall of the middle and upper part of the stirring barrel 41. The buffer assembly comprises a buffer seat, one end of the buffer seat close to the stirring shaft is connected with the fixing rod, a buffer sliding cavity is arranged in the buffer seat, a buffer sliding block is arranged in the buffer sliding cavity, a buffer rod is arranged on one side of the buffer sliding block away from the fixing rod, the other end of the buffer rod penetrates through the side of the buffer seat and is connected with the scraper, and a buffer spring is arranged between the other side of the buffer sliding block and the buffer sliding cavity. Through the arrangement of the stirring shaft, the stirring teeth, the fixing rod, the scraper and the brush, the stirring and turning of the mixed material and the breaking of the sand clumps can be realized, and the mixed material adhered to the inner wall of the stirring barrel can be cleaned.

[0051] Embodiment 2

[0052] On the basis of embodiment 1, the upper end face of the raw material buffer barrel 8 is provided with a buffer barrel first feeding port 81 and a buffer barrel second feeding port 82, the lower end of the stirring barrel discharge pipe 49 is located in the buffer barrel first feeding port 81, the buffer barrel second feeding port 82 is communicated with the sand supplementing barrel through the dragon conveyor, the lower end of the sand supplementing barrel is provided with a sand supplementing barrel discharge pipe, the sand supplementing barrel discharge pipe is communicated with the feeding end of the dragon conveyor, the discharging end of the dragon conveyor is located in the buffer barrel second feeding port 82, and the bottom of the waste recovery box 7 is provided with a weighing instrument 11. The waste falling into the waste recovery box is weighed by the weighing instrument, and the dragon conveyor is controlled to work according to the corresponding weight to supplement the sand in the raw material buffer barrel with the same weight. A certain amount of qualified sand raw material should be placed in the sand supplementing barrel in advance, the sand supplementing barrel is used for supplementing sand to the raw material buffer barrel 8, and the accuracy of the mass of the sand raw material after each premixing is ensured.

[0053] In order to further improve the accuracy of the mass of the sand raw material after each premixing, that is, to ensure that the mass of the sand raw material falling into the raw material buffer barrel after being weighed, stirred and screened tends to be the same as the mass of the sand raw material when being weighed, the pitch of the dragon conveyor is x, the diameter of the helical blade is L, the inclination angle coefficient is c, the working time is T, the bulk density of the sand raw material is p, the rotation speed of the helical shaft of the dragon conveyor is N, and the change of the weight of the weighing instrument before and after each premixing should satisfy the following relationship:

[0054]

[0055] In the above formula, Unit, kg; x, L unit, m; N unit, r / min; T unit, s; p unit, t / m 3 ; λ is the material filling coefficient, the value range is 0.32-0.34; c is 1 when horizontal conveying; a is the correlation coefficient and the value is 47.

[0056] Example 3

[0057] As shown in Figures 1-5, on the basis of Example 2, the application also discloses a sand raw material production method of a stirring and feeding and vibrating device, and the specific steps include:

[0058] S1: the sand material and the solid reinforcing agent are respectively fed into the material collecting and weighing barrel through the first feeding machine and the second feeding machine according to a certain proportion, and the feeding is stopped when the weight measured by the material collecting and weighing barrel reaches a preset threshold value;

[0059] S2: the first valve is opened, the sand material and the solid reinforcing agent fall into the stirring barrel, and a certain proportion of liquid curing agent is added into the stirring barrel while the sand material and the solid reinforcing agent are stirred through the working of the first motor and the pump body, and the stirring is continued;

[0060] S3: during the stirring, the arc-shaped stirring blade can turn the mixture at the bottom of the stirring barrel to the upper part of the stirring barrel during the mixing and stirring, so as to ensure uniform stirring and mixing, and at the same time, the sand agglomerates can be broken;

[0061] S4: after the stirring is completed, the second valve is opened, and the mixture and the sand agglomerates that cannot be broken fall into the circular vibrating screening machine for vibrating screening;

[0062] S5: the valve assembly is in a closed state at the front and middle sections during the working of the circular vibrating screening machine, the qualified sand raw material falls into the raw material buffer barrel from the screening machine second discharge pipe after screening, and the valve assembly is in an open state at the rear section, and the sundries and the sand agglomerates that cannot be broken fall into the waste recycling box through the screening machine first discharge pipe and the cylindrical cloth cover;

[0063] S6: the waste falling into the waste recycling box is weighed through the weighing instrument, and the sand is replenished to the raw material buffer barrel according to the same weight by controlling the working of the alligator conveyor.

[0064] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that it is within the scope of the present application.

[0065] The above-described embodiments only express the implementation of the present application, which is described in a more specific and detailed manner, but should not be understood as a limitation to the scope of the patent of the present application. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A stirring and vibrating device for feeding material, comprising a sand storage barrel (1), characterized in that, It also includes the weighing mechanism (3), stirring mechanism (4), screening mechanism (5) arranged in turn from top to bottom, the discharge end of the sand storage barrel (1) is communicated with the feeding end of the weighing mechanism (3) through the first feeding machine (2), the discharge end of the weighing mechanism (3) is communicated with the feeding end of the stirring mechanism (4), the discharge end of the stirring mechanism (4) is communicated with the feeding end of the screening mechanism (5), the stirring mechanism (4) includes a stirring barrel (41), a stirring rod (44) is coaxially arranged in the stirring barrel (41), stirring blades (46) are arranged on the stirring rod (44), a first motor (45) for rotating the stirring rod (44) is arranged on the upper end of the stirring barrel (41); The upper middle part of the stirring barrel (41) is cylindrical, the lower middle part of the stirring barrel (41) is conical, the upper end of the stirring rod (44) is coaxially connected with the upper end face of the stirring barrel (41) through a bearing, the stirring blades (46) are arc-shaped stirring blades, and the arc-shaped stirring blades are located at the lower middle part of the stirring barrel (41), and the arc-shaped stirring blades can make the raw materials turn over while participating in the stirring and mixing; The weighing mechanism (3) includes a material collecting and weighing barrel (31) and a support rod (32) for supporting the material collecting and weighing barrel, a first parallel plate (33) is arranged on the upper end of the support rod (32), a second parallel plate (34) is arranged on the side face of the material collecting and weighing barrel (31), the second parallel plate (34) is located directly below the first parallel plate (33), a weighing sensor (35) is connected between the first parallel plate (33) and the second parallel plate (34), a first feeding port (36) and a second feeding port (37) are arranged on the upper end face of the material collecting and weighing barrel (31), the first feeding port (36) is communicated with the discharge end of the first feeding machine (2), the second feeding port (37) is communicated with a solid reinforcing agent storage barrel (9) through a second feeding machine (10), the lower end of the material collecting and weighing barrel (31) is conical, and a weighing barrel discharge pipe (38) is arranged at the lower end of the material collecting and weighing barrel, a first valve (39) is further arranged at the weighing barrel discharge pipe (38); A first feeding port (42) and a second feeding port (43) are arranged on the upper end face of the stirring barrel (41), the lower end of the weighing barrel discharge pipe (38) is located inside the first feeding port (42), a liquid inlet pipe is connected to the second feeding port (43), the other end of the liquid inlet pipe is communicated with a liquid curing agent tank through a pump body, a stirring barrel discharge pipe (49) is arranged at the lower end of the stirring barrel (41), and a second valve (491) is further arranged at the stirring barrel discharge pipe (49); The screening mechanism (5) comprises a circular vibrating screening machine (51), a screening machine first discharge pipe (52) for discharging waste materials and a screening machine second discharge pipe (53) for discharging qualified raw materials are arranged on the circular vibrating screening machine (51), a waste material recycling box (7) is arranged at the screening machine first discharge pipe (52), a raw material buffer bucket (8) is arranged at the screening machine second discharge pipe (53), and a screening machine feeding port (54) is further arranged at the upper end of the circular vibrating screening machine (51), and the lower end of the stirring barrel discharge pipe (49) is located inside the screening machine feeding port (54).

2. The mixing and vibrating device according to claim 1, wherein The stirring rod (44) is in the shape of a hollow cylindrical pipe, a plurality of sand inlets (441) are arranged at the middle upper part of the stirring rod (44), and a plurality of sand outlets (442) are arranged at the middle lower part of the stirring rod (44).

3. The mixing and vibrating device according to claim 2, wherein A valve assembly (6) is further arranged at the screening machine first discharge pipe (52), the valve assembly comprises a door-shaped support frame (61), a first air cylinder (62) is vertically arranged at the upper end surface of the door-shaped support frame (61), the cylinder body part of the first air cylinder (62) is connected with the upper end surface of the door-shaped support frame (61), a baffle (63) is connected with the piston rod end of the first air cylinder, the baffle (63) is vertically arranged, and a rectangular opening (64) matched with the baffle is arranged at the upper end surface of the screening machine first discharge pipe (52).

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