An anti-segregation sand bin and a discharging method for the sand bin

Abstract

The present invention relates to a segregation-proof sand bin and a discharging method for the sand bin. A segregation-proof sand bin includes a bin body, and a plurality of discharging holes are arranged at intervals on the bottom of the bin body. Each discharging hole is connected to a discharging pipe, and a valve is arranged on each discharging pipe. The discharging holes adopt one of the following methods: (1) The discharging holes are side discharging holes arranged in at least one circle around the center of the bin body; (2) The discharging holes include a central discharging hole corresponding to the center of the bin body and side discharging holes arranged in at least one circle around the central discharging hole. When the material inside the sand bin needs to be discharged, the valves on the discharging pipes are opened in sequence and only one valve is opened each time. The opening time of each valve is equal, and the amount of material discharged by each discharging pipe is equal, avoiding the formation of a sunken structure with a lower middle and higher surroundings inside the sand bin. The material in the sand bin is approximately planar during the descending process, thereby preventing the material in the sand bin from segregating.

Description

Technical Field

[0001] The invention relates to a large container for storing materials, in particular to an anti-segregation sand bin and a material discharging method for the sand bin. Background Art

[0002] Dry-mixed mortar is a granular mixture obtained by mixing aggregates, inorganic cementitious materials and additives in a certain proportion. It can be used directly after adding water and stirring, which reduces the workload at the construction site and also reduces the dust at the construction site. It is widely used in the construction field. Aggregates for making dry-mixed mortar need to undergo certain pretreatments, such as screening and drying, and then be stored in a sand silo. The finished dry-mixed mortar also needs to be stored in a sand silo. During the storage and discharge of aggregates, it is necessary to evenly distribute the large and small particles in the aggregates to ensure that the produced dry-mixed mortar has a high quality.

[0003] A Chinese utility model patent with the authorization announcement number CN203450654U discloses a sand tank structure, including a bin, a bin top of the bin is provided with a sand inlet pipe for materials to enter the sand tank, and a bin bottom of the bin is provided with a sand outlet pipe for discharging materials from the sand tank. In the above-mentioned sand tank, when the material is discharged from the sand outlet pipe at the bottom of the bin, since only one sand outlet pipe is provided at the bottom of the bin, and the sand outlet pipe is provided in the middle of the bin bottom, the material closer to the mouth of the sand outlet pipe is easier to be discharged during the discharge process, and after a period of discharge, the material in the sand tank will form a concave structure with a low middle and high surroundings, so that the larger particles of material slide and gather in the concave structure, and more large particles of material will be retained in the concave structure, resulting in uneven distribution of materials inside the sand tank; due to the large volume of the sand tank, the material in the sand tank cannot be completely emptied during the production of dry mixed mortar, and the material retained in the sand tank will be segregated. The large particles of material in the concave structure formed by the single-pipe discharge will also cause the uniformity of the discharged material to be inconsistent in the subsequent discharge process, thereby reducing the quality of the produced dry-mixed mortar. Summary of the invention

[0004] The object of the present invention is to provide an anti-segregation sand silo to solve the problem of material segregation in the sand silo caused by single-pipe discharge in the sand silo in the prior art; at the same time, the present invention also provides a discharge method suitable for the above-mentioned sand silo to improve the quality of dry-mixed mortar.

[0005] To achieve the above object, the technical solution of the anti-segregation sand bin of the present invention is: an anti-segregation sand bin, comprising a bin body, a plurality of discharge holes are arranged at intervals on the bin bottom of the bin body, each discharge hole is connected to a discharge pipe, each discharge pipe is provided with a valve, and the discharge holes are arranged in one of the following ways:

[0006] (1) The discharge holes are arranged in at least one circle around the center of the bin body;

[0007] (2) The discharge holes include a central discharge hole arranged corresponding to the center of the bin body, and side discharge holes arranged in at least one circle around the central discharge hole.

[0008] The beneficial effects of the present invention are as follows: a plurality of discharge holes are arranged at intervals on the bottom of the silo, a valve is provided on a discharge pipe connected to the discharge holes, the plurality of discharge holes are arranged at least in one circle around the center of the silo body, or a central discharge hole is arranged at a position corresponding to the center of the silo body, and at least one circle of side discharge holes is provided around the central discharge hole; the discharge holes are arranged relatively evenly on the bottom of the silo, and when the material inside the sand silo needs to be discharged, the valves on the discharge pipes are opened in turn and only one valve is opened at a time, and the opening time of each valve is equal, so the amount of material discharged from each discharge pipe is also equal. Since the discharge holes are arranged relatively evenly on the bottom of the silo, a concave structure with a low middle and high surroundings formed inside the sand silo due to single-pipe discharge is avoided, and the material in the sand silo is roughly flat during the descent process, and the materials will not separate, thereby preventing the material in the sand silo from segregating.

[0009] Furthermore, the discharge hole includes the central discharge hole and the side discharge hole, the silo bottom is an inverted conical silo bottom coaxial with the sand silo, the central discharge hole is arranged at the bottom of the inverted conical silo bottom, and the side discharge holes are arranged on the side walls of the inverted conical silo bottom; the silo bottom of the sand silo is an inverted cone, which is convenient for collecting materials at the bottom of the sand silo, and the central discharge hole is arranged at the bottom of the sand silo, so that the material in the sand silo can be completely discharged when there is less material in the sand silo, and the side discharge holes are arranged on the side walls of the inverted conical silo bottom, so that the arrangement of the discharge holes at the silo bottom is more uniform, and the material in the sand silo can be discharged uniformly.

[0010] Furthermore, the discharge pipe connected to the side discharge hole is the side discharge pipe, and the discharge pipe connected to the central discharge hole is the central discharge pipe. The central discharge pipe has a collecting pipe section behind the valve, and the pipe openings of the side discharge pipes are gathered and connected to the collecting pipe section; the pipe openings of the side discharge pipes are gathered and connected to the collecting pipe section of the central discharge pipe, and only one pipe is needed to transport the material to the next process during discharge, making the structure of the sand bin more compact.

[0011] Furthermore, the anti-segregation sand bin also includes a feeding device arranged on the upper part of the bin body for feeding materials into the sand bin, the feeding device includes a fixed feeding hopper for communicating with the corresponding feeding device, a feeding cone is provided in the fixed feeding hopper, a plurality of feeding holes evenly distributed around the feeding cone are provided at the bottom of the circumferential bucket wall of the fixed feeding hopper, or the feeding cone and the circumferential bucket wall of the fixed feeding hopper form an annular feeding area arranged around the feeding cone at the bottom of the fixed feeding hopper, the annular feeding area is provided with a plurality of feeding holes evenly distributed around the feeding cone, each feeding hole is respectively connected to a feeding pipe for feeding, and the pipe openings of all feeding pipes form a feeding pipe along the The distribution cone has at least two circles of pipe openings arranged at intervals in the radial direction, and the pipe openings in each circle are evenly spaced along the circumferential direction of the distribution cone. Each distribution tube is a single-mouth distribution tube with only a single pipe opening, or at least one distribution tube is a multi-mouth distribution tube with more than two pipe openings, and all the pipe openings of a single multi-mouth distribution tube are in the same circle; the material can slide evenly along the conical surface of the distribution cone to the lower part of the distribution cone, and then be evenly distributed to the distribution holes on the circumferential bucket wall of the fixed distribution hopper, or evenly distributed to the distribution holes on the annular distribution area, and finally fall into the sand bin through the distribution tubes distributed around the distribution cone, so as to realize the even distribution of the material and the even falling of the material inside the sand bin.

[0012] Furthermore, the distribution hole is located on the annular distribution area, and one of the two sides of the distribution hole in the radial direction of the distribution cone is connected to the distribution cone on one side, and the other side is connected to the circumferential bucket wall of the fixed distribution bucket; the distribution hole occupies the area of ​​the annular distribution area as much as possible, on the one hand to ensure the material falling speed, on the other hand to effectively reduce the accumulation in the annular distribution area.

[0013] Furthermore, the distribution pipe is a single-mouth distribution pipe, the mouths of the distribution pipe are arranged in three circles at radial intervals of the distribution cone, and the sum of the number of mouths in the inner circle and the middle circle is equal to the number of mouths in the outermost circle; the single-mouth distribution pipe is easy to set up, and the number of materials falling into the sand bin from the inner circle and the middle circle is equal to the number of materials entering the sand bin from the outermost circle, so that the material falls into the sand bin evenly.

[0014] Furthermore, the center line of the distribution cone is colinear with the center line of the sand bin; the pipe opening of the distribution pipe is arranged around the distribution cone, so the pipe opening of the distribution pipe is also arranged around the center line of the sand bin, so that the pipe opening of the distribution pipe is also evenly distributed in the sand bin to prevent material segregation.

[0015] Furthermore, each of the distribution pipes has a vertically extending pipe section extending vertically downward at its pipe mouth; as the material in the sand bin gradually accumulates, the height of the material in the sand bin gradually increases, and the landing point of the inclined material falling into the sand bin will also change. A vertical extension section is provided at the pipe mouth of the drop pipe to make the pipe mouth face vertically downward, so that the material falling into the sand bin from each distribution pipe falls vertically into the sand bin, and the landing point of the material will not change.

[0016] Furthermore, a plurality of dividing plates extending in the vertical direction are connected between the bucket wall of the fixed distribution hopper and the distribution cone, and the bottom of the dividing plates is connected to the bucket bottom of the fixed distribution hopper. The number of dividing plates is equal to the number of distribution holes, and a dividing plate is arranged between every two adjacent distribution holes to divide the interior of the fixed distribution hopper into a plurality of distribution cavities with equal volumes. The dividing plates are used to divide the fixed distribution hopper into distribution cavities with equal volumes, and each distribution cavity has a distribution hole, so as to ensure that the amount of material passing through each distribution hole is equal, so that the material can be evenly distributed inside the sand bin.

[0017] Furthermore, the material distribution device also includes a feeder fixed between the fixed material distribution hopper and the feeding device, the feeder includes a distribution unit, a rotating unit and a driving motor for driving the rotating unit to rotate, the distribution unit is provided with a plurality of fan-shaped distribution cavities with the same volume and corresponding to the material distribution cavity at circumferential intervals along the rotating axis of the rotating unit, the upper and lower ends of the fan-shaped distribution cavity are both open structures, the rotating unit includes an upper blocking plate arranged on the upper side of the distribution unit to cover the upper end opening of the fan-shaped distribution cavity and a lower blocking plate arranged on the lower side of the distribution unit to cover the lower end opening of the fan-shaped distribution cavity, the upper blocking plate is provided with a fan-shaped feed inlet for material to enter the fan-shaped distribution cavity, and the lower blocking plate is provided with a fan-shaped feed inlet for material to enter the fan-shaped distribution cavity. The disk is provided with a fan-shaped discharge port for materials to flow out of the fan-shaped distribution cavity, and the feed port and the discharge port are staggered by at least one fan-shaped distribution cavity in the rotation circumferential direction of the rotating unit; during the process of the driving motor driving the rotating unit to rotate at a uniform speed, only the upper end openings of some fan-shaped distribution cavities are connected with the feed port of the upper blocking disk, and the materials enter the fan-shaped distribution cavity of the distribution unit through the feed port, and the feed port of the upper blocking disk and the discharge port of the lower blocking disk are staggered with each other. The same fan-shaped distribution cavity can only be in a feeding state or a discharging state at any time. After the distribution by the feeder, the amount of material entering each distribution cavity is equal, thereby realizing uniform feeding and uniform unloading in the circumferential direction.

[0018] Furthermore, the projection of the feed port on the lower baffle plate and the discharge port are centrally symmetrically arranged along the rotation axis of the rotating unit, which facilitates the design and processing of the rotating unit and ensures that the feed port and the discharge port are staggered with each other.

[0019] Furthermore, the material distribution unit includes an inner annular partition and an outer annular partition coaxially arranged, and a cavity partition radially connected between the inner annular partition and the outer annular partition, and a plurality of cavity partitions are evenly distributed at circumferential intervals along the rotation axis of the rotating unit, and each fan-shaped material distribution cavity is surrounded by an inner annular partition, an outer annular partition and two adjacent cavity partitions; the fan-shaped material distribution cavity is formed by the inner partition, the outer partition and the cavity partition, so that the structure of the feeder is more compact.

[0020] Furthermore, the upper material blocking plate and the lower material blocking plate are both disc structures with fan-shaped openings. The fan-shaped opening on the upper material blocking plate constitutes the feed port, and the fan-shaped opening on the lower material blocking plate constitutes the discharge port. The center of the disc structure is set on the rotation axis of the rotating unit. The upper material blocking plate and the lower material blocking plate are connected by an intermediate connecting part. The intermediate connecting part is a hollow structure and is located in the inner hole formed by the inner annular partition. The intermediate connecting part is drivingly connected to the output shaft of the driving motor; the structure of the feeder is fully utilized to make the structure of the feeder more compact.

[0021] The technical solution of the discharging method of the present invention is: the discharging method for the above-mentioned anti-segregation sand bin comprises the following steps:

[0022] (1) Multiple discharge pipes on the anti-segregation sand bin are divided into n discharge pipe groups, n ≥ 3, and each discharge pipe group includes m discharge pipes, m ≥ 1;

[0023] (2) By controlling the valves on each discharge pipe, n discharge pipe groups are opened in sequence. When a single discharge pipe group is opened, the other discharge pipe groups are closed, and the opening time of each discharge pipe group is equal.

[0024] The beneficial effect of the discharge method of the present invention is that each discharge pipe group is opened in sequence for an equal period of time, so that materials at various locations in the sand bin can be discharged, avoiding the concave structure formed by single-pipe discharge, and ensuring a relatively flat surface inside the sand bin during the discharge process, preventing material segregation caused by the accumulation of larger particles of material in the concave structure, thereby ensuring material uniformity during the discharge process and improving the quality of the dry mixed mortar produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an overall schematic diagram of the first embodiment of the anti-segregation sand bin of the present invention;

[0026] Figure 2 for Figure 1 Schematic diagram of the feeding device and the material distribution device;

[0027] Figure 3 for Figure 2 Schematic diagram of the medium feeder;

[0028] Figure 4 for Figure 2 Top view of the middle feeder;

[0029] Figure 5 for Figure 2 Schematic diagram of the lower disc of the middle feeder;

[0030] Figure 6 for Figure 2 A top view of the fixed fabric hopper;

[0031] Figure 7 for Figure 2 A top view of the middle material distribution device;

[0032] Figure 8 for Figure 2 Distribution diagram of the outlets of the middle distribution pipe inside the sand bin;

[0033] Fig. 9 for Figure 1 Schematic diagram of the middle discharging device;

[0034] Fig.10 for Fig. 9 Bottom view of

[0035] Fig.11 It is a schematic diagram of the feeding device and the distribution device of the second embodiment of the anti-segregation sand bin of the present invention.

[0036] Among them: 1-feeding device, 2-distributing device, 3-feeder, 4-bin, 5-central discharge pipe, 6-valve, 7-drive motor, 8-distributing pipe, 9-fixed distributing hopper, 10-circular upper baffle plate, 11-circular lower baffle plate, 12-shaft sleeve, 13-outer annular partition, 14-inner annular partition, 15-cavity partition, 16-fan annular distribution cavity, 17-discharge port, 18-feeding port, 19-distributing hole, 20-distributing cavity, 21-distributing plate, 22-distributing cone, 23-pipe mouth, 24-outer drop area, 25-inner drop area, 26-collecting port, 27-inverted cone silo bottom, 28-central discharge hole, 29-distributing cone, 30-side discharge hole, 31-side discharge pipe. DETAILED DESCRIPTION

[0037] The anti-segregation sand bin of the present invention will be further described below in conjunction with the accompanying drawings.

[0038] Embodiment 1 of the anti-segregation sand bin of the present invention: Figure 1 As shown, the anti-segregation sand bin includes a bin body 4, a feeding device 1 and a distribution device 2 are arranged on the top of the bin body 4, a discharging device is arranged on the bottom of the bin body 4, the distribution device 2 is used to evenly distribute the material into the sand bin, and the discharging device is used to evenly discharge the material.

[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the material distribution device 2 includes a fixed material distribution hopper 9 arranged on the top of the silo and a feeder 3 fixed between the fixed material distribution hopper 9 and the feeding device 1, the feeder 3 includes a material distribution unit, a rotating unit and a driving motor 7 for driving the rotating unit to rotate, the material distribution unit includes an inner annular baffle 14 and an outer annular baffle 13 arranged coaxially, and a plurality of cavity baffles 15 radially connected between the inner annular baffle 14 and the outer annular baffle 13 and extending vertically, the axes of the inner annular baffle 14 and the outer annular baffle 13 coincide with the rotation axis of the rotating unit, the upper and lower parts of the outer annular baffle 13 are respectively provided with flange structures fixedly connected to the feeding device 1 and the fixed material distribution hopper 9, the cavity baffle 15 divides the inner annular baffle 14 and the outer annular baffle 13 into a plurality of fan-shaped material distribution cavities 16 with the same volume, and the cavity baffle 15 not only plays a dividing role, but also plays a role in connecting the inner annular baffle 14 and the outer annular baffle 13. Specifically, in this embodiment, a total of 36 cavity partitions 15 are provided, dividing the space between the inner annular partition 14 and the outer annular partition 13 into 36 fan-shaped material distribution cavities 16 with equal volumes.

[0040] like Figure 3 , Figure 4 and Figure 5 As shown, the rotating unit includes a circular upper blocking plate 10 arranged on the upper side of the distributing unit to block the upper end opening of the fan-shaped distributing cavity 16, and the rotating unit also includes a circular lower blocking plate 11 arranged on the lower side of the distributing unit to block the lower end opening of the fan-shaped distributing cavity 16. The circular upper blocking plate 10 is provided with a feed inlet 18 for materials to enter the fan-shaped distributing cavity 16, and the feed inlet 18 is a fan-shaped inlet with a central angle of 90°; the circular lower blocking plate 11 is provided with a discharge port 18 for materials to flow out of the fan-shaped distributing cavity 16 The feed port 18 is a fan-shaped material distribution cavity 16 with a central angle of 90 degrees. The projection of the feed port 18 on the circular lower baffle plate 11 and the discharge port 17 are arranged in a central symmetry along the rotation axis of the rotating unit. That is to say, the feed port 18 and the discharge port 17 are staggered by 9 fan-shaped material distribution cavities 16 in the rotation circumference of the rotating unit to avoid the same fan-shaped material distribution cavity 16 being connected to the feed port 18 and the discharge port 17 at the same time, ensuring that each fan-shaped material distribution cavity 16 can be filled with materials and facilitating the design and processing of the rotating unit.

[0041] A shaft sleeve 12 is connected between the circular upper material retaining plate 10 and the circular lower material retaining plate 11, and the shaft sleeve 12 is driven by the driving motor 7 to drive the rotating unit to rotate. When feeding is required, the driving motor 7 is started, and the material in the feeding device 1 passes through the feeding port 18 to fill the fan-shaped material distribution cavity 16 below the feeding port 18. At this time, since the discharge port 17 is not connected to the feeding port 18, the material will not flow downward. With the rotation of the circular upper material retaining plate 10 and the circular lower material retaining plate 11, when the discharge port 17 rotates to the bottom of the fan-shaped material distribution cavity 16 filled with materials, the material can flow downward. In this way, the amount of material passing through each fan-shaped material distribution cavity 16 is equal, so that the material in each fan-shaped material distribution cavity 16 is a uniform full flow.

[0042] like Figure 2 and Figure 6 As shown, the fixed distribution hopper 9 has a cylindrical hopper wall, the upper part of which is connected to the outer annular partition 13 through a flange, and a distribution cone 22 coaxial with the hopper wall is provided inside the fixed distribution hopper 9. The distribution cone 22 is a frustum, and the distribution cone 22 and the bottom of the fixed distribution hopper 9 form an annular distribution area, and a dividing plate 21 corresponding to the cavity partition 15 in the vertical direction is provided between the hopper wall of the fixed distribution hopper 9 and the distribution cone 22. The dividing plate 21 extends vertically to the bottom of the fixed distribution hopper 9, and the dividing plate 21 divides the interior of the fixed distribution hopper 9 into 36 distribution cavities 20, and a distribution hole 19 is provided at the bottom corresponding to each distribution cavity 20, and each distribution hole 19 is connected to a distribution pipe 8. Since the amount of material entering each distribution cavity 20 is the same, the material flowing through each distribution hole 19 is also equal.

[0043] like Figure 7 and Figure 8 As shown, the pipe openings 23 of the distribution pipe 8 are arranged in three circles at intervals on the top of the silo body 4, 6 and 12 pipe openings 23 are arranged in the inner circle and the middle circle respectively, and 18 pipe openings 23 are arranged in the outer circle. The top of the silo body 4 is divided into an inner drop area 25 and an outer drop area 24 of equal area. The inner drop area 25 is distributed with pipe openings 23 forming an inner circle, and the outer drop area 24 is distributed with pipe openings 23 forming an outer circle. Since the amount of material entering each distribution hole 19 is equal, the amount of material entering each distribution pipe 8 is also equal. Such an arrangement can make the material falling into the sand silo as uniform as possible, so that a roughly plane is formed inside the silo body 4, avoiding the phenomenon that a single pipe opening causes the material to form a cone in the sand silo during the feeding process, resulting in uneven distribution of the material inside the sand silo, thereby preventing the material in the sand silo from segregating.

[0044] The pipe mouth 23 of the distribution pipe 8 has a vertically downward extension section. Due to the large vertical height difference inside the sand bin, if the pipe mouth 23 is inclined along the distribution pipe 8, as the material accumulates, the landing point of the material in the horizontal direction inside the sand bin will change, making the material in the sand bin uneven. Providing a downward extension section on the distribution pipe 8 can ensure that the material flowing out of the pipe mouth 23 always flows vertically downward, and the landing point of the material in the horizontal direction will not change, ensuring that the material falls vertically inside the sand bin, so that the material can be evenly distributed in the sand bin.

[0045] like Fig. 9 and Fig.10 As shown, the bottom of the sand bin is an inverted cone-shaped bin bottom 27. Setting the bottom of the sand bin in an inverted cone shape can allow the material in the sand bin to gather at the inverted cone-shaped bin bottom 27. A central discharge hole 28 is provided at the bottom of the inverted cone-shaped bin bottom 27. A central discharge hole 28 is connected to the bottom of the central discharge hole 28. A central discharge pipe 5 is connected below the central discharge hole 28. The central discharge hole 28 is provided at the bottom of the inverted cone-shaped bin bottom 27 so that the material in the sand bin can be completely discharged.

[0046] A circle of side discharge holes 30 surrounding the central discharge hole 28 is provided on the side wall of the inverted conical bin bottom 27. Six side discharge holes 30 are evenly arranged in the circumferential direction of the inverted conical bin bottom 27, and each side discharge hole 30 is connected to a side discharge pipe 31. A valve 6 is provided on both the central discharge pipe 5 and the side discharge pipe 31. The valve 6 in this embodiment uses a pneumatic flat door. The pipe openings of each side discharge pipe 31 are collected and connected to the manifold section behind the valve 6 of the central discharge pipe 5, and the pipe openings of the side discharge pipes 31 are collected and connected to the central discharge pipe 5. When discharging, only one collecting material port 26 needs to be provided on the central discharge pipe 5, which avoids the need for multiple side discharge pipes 31 to be connected to the next process through multiple conveying pipelines, making the structure more compact.

[0047] When the anti-segregation sand bin of the present invention is in use, the material enters the distribution device 2 from the feeding device 1, and the material is evenly distributed to each distribution cavity 20 after passing through the feeder 3, and then enters the distribution pipe 8 through the distribution hole 19 on the distribution cavity 20. The pipe mouth of the distribution pipe 8 is evenly distributed on the top of the sand bin, so that the material can fall into the sand bin evenly, so that the material forms a roughly plane when falling into the sand bin, and a large cone angle will not appear, thereby preventing the material from being segregated during the feeding process.

[0048] When the sand bin needs to discharge, the valves 6 on the discharge pipe are opened in sequence, and only one valve 6 is opened at a time to discharge the material. The opening time of each valve 6 is the same, and the amount of material discharged from each discharge hole is also equal, so that the material in the sand bin 4 can also maintain a roughly flat surface during the discharge process, and a concave structure with a low middle and high sides will not be formed in the sand bin, which prevents the material from segregating during the discharge process, thereby improving the quality of the dry-mixed mortar.

[0049] The anti-segregation sand bin of the present invention can evenly fall into the sand bin after the material enters the distribution device through the distribution of the feeder and the fixed distribution hopper. During the discharge process, since each discharge pipe discharges the material separately in sequence, it is ensured that the material in each part of the sand bin can drop evenly, and even distribution is achieved in the process of distribution and discharge, effectively preventing material segregation.

[0050] The second embodiment of the anti-segregation sand bin of the present invention is different from the first embodiment in that: Fig.11 As shown, a distribution device 2 and a feeding device 1 are arranged on the upper part of the warehouse body 4. No feeder is arranged on the upper part of the fixed distribution hopper of the distribution device 2, but a distribution cone 29 coaxial with the fixed distribution hopper is arranged inside the fixed distribution hopper, and the distribution cone 29 has a cone tip, and the bottom of the distribution cone 29 and the bottom of the fixed distribution hopper form an annular distribution area, and the top of the distribution cone 29 is directly below the outlet of the feeding device, and a plurality of distribution holes are evenly arranged on the annular distribution area, and the distribution holes are connected to the distribution pipe 8; a valve is arranged below the feeding device 1, and the outlet of the feeding device 1 is arranged below the valve, and the outlet of the feeding device 1 is coaxially arranged with the distribution cone 29. The discharging device in this embodiment is the same as the discharging device in the first embodiment. The material flowing out of the outlet of the feeding device 1 flows downward in a uniform and dispersed manner along the outer surface of the distribution cone 29; the distribution cone 29 is colinear with the center line of the fixed distribution hopper, so that the bottom surface of the distribution cone and the bottom of the fixed distribution hopper form an annular distribution area. Since the material flows downward uniformly along the outer surface of the distribution cone 29, the material is evenly distributed in the annular distribution area, ensuring that the material can evenly enter the sand bin 4.

[0051] The third embodiment of the anti-segregation sand bin of the present invention is different from the first embodiment in that three, four or more side discharge holes are evenly arranged around the central discharge hole, and the number of discharge holes is flexibly adjusted according to different sand bin sizes to ensure that the material in the sand bin falls evenly.

[0052] Embodiment 4 of the anti-segregation sand bin of the present invention is different from embodiment 1 in that the bottom of the sand bin is a circular flat-plate bottom, a central discharge hole is arranged at the center of the bin bottom, and a circle of evenly distributed side discharge holes are arranged around the central discharge hole. Compared with the inverted cone-shaped bin bottom, setting the bin bottom to a flat plate shape can increase the volume of the sand bin, thereby making the capacity of the sand bin larger.

[0053] Embodiment 5 of the anti-segregation sand bin of the present invention is different from embodiment 1 in that: two circles of side discharge holes are arranged around the central discharge hole on the bottom of the sand bin, or at least three circles of side discharge holes are arranged around the central discharge hole, and each discharge hole is connected to a discharge pipe, so that the material in the sand bin can fall more evenly, but the workload of the opening and closing valve will be increased accordingly.

[0054] The sixth embodiment of the anti-segregation sand bin of the present invention is different from the first embodiment in that no central discharge hole is provided at the bottom of the sand bin, but only a circle of side discharge holes is provided. Of course, two or more circles can also be provided to meet the discharge needs of sand bins of different sizes.

[0055] The seventh embodiment of the anti-segregation sand bin of the present invention is different from the first embodiment in that the pipe openings of the side discharge pipes are not connected to the central discharge pipe, and are transported to the next process through the corresponding delivery pipes.

[0056] The eighth embodiment of the anti-segregation sand bin of the present invention is different from the first embodiment in that the distribution holes are arranged on the circumferential bucket wall of the fixed distribution bucket, and a distribution plate is arranged between every two distribution holes.

[0057] The ninth embodiment of the anti-segregation sand bin of the present invention is different from the first embodiment in that the number of the dividing plates is four, and the number of the corresponding cavity partitions is also four.

[0058] The tenth embodiment of the anti-segregation sand bin of the present invention is different from the first embodiment in that the central angle of the discharge port is 30° or 45° or 60° or 120° or other angles, and the central angle of the feed port is 30° or 45° or 60° or 120° or other angles.

[0059] The eleventh embodiment of the anti-segregation sand bin of the present invention is different from the first embodiment in that the pipe openings of the material distribution pipes are arranged at intervals of two circles on the top of the sand bin, so that the pipe openings are evenly distributed on the top of the sand bin, so that the amount of material falling into the sand bin from the pipe openings is equal. Of course, the pipe openings can also be arranged in multiple circles on the top of the sand bin.

[0060] The twelfth embodiment of the anti-segregation sand bin of the present invention is different from the first embodiment in that: each distribution cavity corresponds to two or more fan-shaped distribution cavities, for example, 18 distribution cavities are set and 36 fan-shaped distribution cavities are correspondingly set; or each fan-shaped distribution cavity corresponds to two or more distribution cavities.

[0061] The thirteenth embodiment of the anti-segregation sand bin of the present invention is different from the first embodiment in that the projection of the discharge port on the circular lower baffle plate is not symmetrical with the feed port, and the discharge port and the feed port are separated by one or two or more fan-shaped material distribution cavities to ensure that the feed port and the discharge port are not connected to each other at any time.

[0062] Embodiment 14 of the anti-segregation sand bin of the present invention is different from embodiment 1 in that: 8 discharge pipes are arranged at the bottom of the sand bin, and the 8 discharge pipes are divided into 4 discharge pipe groups, each discharge pipe group has 2 discharge pipes, and the discharge pipe groups are opened in sequence during discharge, when one discharge pipe group is opened, the other discharge pipe groups are closed, and the opening time of each discharge pipe group is equal.

[0063] The fifteenth embodiment of the anti-segregation sand bin of the present invention is different from the first embodiment in that the center line of the distribution cone deviates from the center line of the sand bin. For example, the distribution cone is set at the position of the sand bin wall. This makes it easy to set and fix the distribution device. At this time, the pipe openings of each distribution pipe can be arranged around the center line of the sand bin, so that the material can still fall evenly inside the sand bin.

[0064] Embodiment 16 of the anti-segregation sand bin of the present invention is different from embodiment 1 in that: at least one distribution pipe is a multi-orifice distribution pipe with more than two orifices, and all the orifices of a single multi-orifice distribution pipe are in the same circle; the distribution pipe has multiple orifices, which can distribute the material more evenly in the sand bin.

[0065] An embodiment of the discharge method of the present invention is a discharge method for the above-mentioned anti-segregation sand bin, wherein a plurality of seven discharge pipes are arranged at the bottom of the sand bin, wherein one discharge pipe is a central discharge pipe connected to the center of the bin bottom, and the remaining six discharge pipes are side discharge pipes evenly distributed around the central discharge pipe, and the side discharge pipes are on a circle with the central discharge pipe as the center.

[0066] The seven discharge pipes are divided into seven groups, with one pipe in each group. When discharge is required, only one discharge pipe is opened and the other discharge pipes are closed. The opening time of each discharge pipe is the same. By opening the discharge pipes in sequence, the material in the sand bin can be evenly lowered to prevent separation and segregation of the material in the sand bin, thereby improving the quality of the produced dry mixed mortar.

[0067] In other embodiments of the discharge method of the present invention, other numbers of discharge pipe groups can also be set, such as three groups, four groups or more. Of course, the number of discharge pipes in each group can also be set to two, three or more. That is to say, the same number of discharge pipes are opened at one time, and the opening time of each group of discharge pipes is the same, which can also make the material in the sand bin drop evenly.

Claims

1. A discharging method for a segregation-proof sand bin, characterized in that: it includes a bin body, an inlet device and a distributing device are arranged at the top of the bin body, the distributing device is used to evenly distribute materials into the sand bin, the bottom of the bin body is an inverted conical bin bottom, a central discharging hole is arranged at the bottom of the inverted conical bin bottom, and a circle of side discharging holes surrounding the central discharging hole is arranged on the side wall of the inverted conical bin bottom. Each discharging hole is connected to a discharging pipe, and a valve is arranged on each discharging pipe; during operation, the multiple discharging pipes on the segregation-proof sand bin are evenly divided into n discharging pipe groups, n≥3, and each discharging pipe group includes m discharging pipes, m≥1; by controlling the valves on each discharging pipe, the n discharging pipe groups are opened in sequence. When a single discharging pipe group is opened, the other discharging pipe groups are closed, and the opening time of each discharging pipe group is equal.

2. The discharging method for a segregation-proof sand bin according to claim 1, characterized in that: the bin bottom is an inverted conical bin bottom coaxial with the sand bin.

3. The discharging method for a segregation-proof sand bin according to claim 2, characterized in that: the discharging pipe connected to the side discharging hole is a side discharging pipe, the discharging pipe connected to the central discharging hole is a central discharging pipe, the central discharging pipe has a flow collecting pipe section behind the valve, and the pipe orifices of the side discharging pipes converge and communicate with the flow collecting pipe section.

4. The discharging method for a segregation-proof sand bin according to claim 1 or 2 or 3, characterized in that: the distributing device includes a fixed distributing hopper for communicating with the corresponding inlet device, a distributing cone is arranged in the fixed distributing hopper, a plurality of distributing holes evenly distributed around the distributing cone are arranged at the bottom of the circumferential hopper wall of the fixed distributing hopper, or an annular distributing area surrounding the distributing cone is formed at the bottom of the hopper between the distributing cone and the circumferential hopper wall of the fixed distributing hopper, and a plurality of distributing holes evenly distributed around the distributing cone are arranged in the annular distributing area. Each distributing hole is respectively connected to a distributing pipe for distribution. The pipe orifices of all the distributing pipes form at least two circles of pipe orifices arranged at intervals in the radial direction of the distributing cone, and each circle of pipe orifices is evenly distributed at intervals in the circumferential direction of the distributing cone. Each distributing pipe is a single-orifice distributing pipe with only a single pipe orifice or at least one distributing pipe is a multi-orifice distributing pipe with two or more pipe orifices. All the pipe orifices of a single multi-orifice distributing pipe are in the same circle.

5. The discharging method for a segregation-proof sand bin according to claim 4, characterized in that: the distributing holes are located in the annular distributing area.

6. The discharging method for a segregation-proof sand bin according to claim 5, characterized in that: the distributing pipes are single-orifice distributing pipes, and the pipe orifices of the distributing pipes are arranged in three circles at intervals in the radial direction of the distributing cone. The sum of the number of pipe orifices in the inner circle and the middle circle is equal to the number of pipe orifices in the outermost circle.

7. The discharging method for a segregation-proof sand bin according to claim 6, characterized in that: the center line of the distributing cone is collinear with the center line of the sand bin.

8. The discharging method for a segregation-proof sand bin according to claim 6, characterized in that: a vertically downward vertical extension pipe section is provided at the pipe orifice of each distributing pipe.

9. The discharging method for a segregation-proof sand bin according to claim 5 or 6 or 7 or 8, characterized in that: A plurality of dividing plates extending in the vertical direction are connected between the bucket wall of the fixed distribution hopper and the distribution cone, and the bottom of the dividing plates is connected to the bottom of the fixed distribution hopper. The number of dividing plates is equal to the number of distribution holes, and a dividing plate is arranged between every two adjacent distribution holes to divide the interior of the fixed distribution hopper into a plurality of distribution cavities with equal volume.

10. The method for discharging anti-segregation sand bin according to claim 9, Features: The material distribution device also includes a feeder fixed between the fixed distribution hopper and the feeding device, the feeder includes a distribution unit, a rotating unit and a driving motor for driving the rotating unit to rotate, the distribution unit is provided with a plurality of fan-shaped distribution cavities with the same volume and corresponding to the distribution cavity, and the upper and lower ends of the fan-shaped distribution cavity are both open structures, the rotating unit includes an upper blocking plate arranged on the upper side of the distribution unit to cover the upper opening of the fan-shaped distribution cavity and a lower blocking plate arranged on the lower side of the distribution unit to cover the lower opening of the fan-shaped distribution cavity, the upper blocking plate is provided with a fan-shaped feed inlet for materials to enter the fan-shaped distribution cavity, and the lower blocking plate is provided with a fan-shaped discharge port for materials to flow out of the fan-shaped distribution cavity, and the feed inlet and the discharge port are staggered at least one fan-shaped distribution cavity in the rotation circumferential direction of the rotating unit.

11. The method for discharging anti-segregation sand bin according to claim 10, Features: The projection of the feed port on the lower material blocking plate and the discharge port are centrally symmetrically arranged along the rotation axis of the rotating unit.

12. The method for discharging anti-segregation sand bin according to claim 10 or 11, Features: The material distribution unit includes an inner annular partition and an outer annular partition coaxially arranged, and a cavity partition radially connected between the inner annular partition and the outer annular partition. A plurality of cavity partitions are evenly distributed at circumferential intervals along the rotation axis of the rotating unit, and each fan-shaped material distribution cavity is surrounded by an inner annular partition, an outer annular partition and two adjacent cavity partitions.

13. The method for discharging anti-segregation sand bin according to claim 12, Features: The upper material blocking plate and the lower material blocking plate are both disc structures with fan-shaped openings. The fan-shaped opening on the upper material blocking plate constitutes the feed port, and the fan-shaped opening on the lower material blocking plate constitutes the discharge port. The center of the disc structure is set on the rotation axis of the rotating unit. The upper material blocking plate and the lower material blocking plate are connected by an intermediate connecting part. The intermediate connecting part is a hollow structure and is located in the inner hole formed by the inner annular partition. The intermediate connecting part is drivingly connected to the output shaft of the drive motor.

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