A material bin, a concrete raw material system and a method for breaking arch of materials

Abstract

The present invention discloses a material bin, a concrete raw material system and a material arch breaking method, belonging to the technical field of material storage. The material bin includes a material bin body and an arch breaking mechanism installed on the material bin body. The arch breaking mechanism includes a rotating shaft and a driving device for driving the rotating shaft to rotate around the axis of the rotating shaft. The rotating shaft is a hollow shaft and further includes an air outlet hole communicated with the internal space of the rotating shaft. The air outlet hole is located inside the material bin body, and the outlet end of the air outlet hole faces the inner wall of the material bin body. The air outlet hole can rotate with the rotating shaft. The raw material system is based on the material bin, and the arch breaking method can be the arch breaking method of the material bin. By adopting the technical solution proposed in this scheme, the arching phenomenon occurring in the material bin can be more effectively eliminated under the condition of a simple material bin structure.

Description

Technical Field

[0001] The present invention relates to the technical field of material storage, and particularly to a material bin, a concrete raw material system and a method for breaking arch of materials. Background Art

[0002] Material bins are commonly used equipment in the existing production and material storage industries. Different from traditional open-space material storage, using material bins for material storage has the characteristics of small floor area, convenient management of the material storage environment, and effective avoidance of dust environmental pollution.

[0003] In the concrete production industry, due to the large number of raw materials required for concrete production, the aggregate bins, powder tanks, and mixing main engines of traditional concrete mixing plants are all set on the ground. Aggregates are transported to the feeding port by a forklift and then transported to the mixer by a belt. Powders are transported from the powder tank to the mixing main engine by a screw feeder, and the finished concrete is discharged into the tanker in a dropping manner through the discharge port of the mixing main engine. With the development of the industry, in the prior art, there has emerged an immersion mixing station, that is, an underground concrete mixing station. As described in the technical solution provided by the application number CN201720098658.X, by setting the traditional ground plant underground, problems such as equipment cost, danger coefficient, dust, and noise can be effectively solved. At the same time, the raw materials for concrete production have also been converted from traditional ground storage to bin storage.

[0004] When the material bin is in use, the arching phenomenon seriously affects the normal use of the material bin, resulting in the inability to effectively release the materials therein. In response to this problem, various types of arch-breaking technical solutions have emerged in the prior art. The two more common methods are vibration motor arch-breaking and pneumatic impact arch-breaking.

[0005] The storage of powders and fine aggregates is widely used not only in the concrete production industry but also in industries such as grain processing and building material production.

[0006] Further optimizing the structural design of the material bin to better solve the arching problem existing in the release of materials in the material bin will undoubtedly have a positive promoting effect on multiple industries. Summary of the Invention

[0007] In view of the technical problem of further optimizing the structural design of the material bin to better solve the arching problem existing in the release of materials in the material bin, which undoubtedly has a positive promoting effect on multiple industries, the present invention provides a material bin, a concrete raw material system and a method for breaking arch of materials. By adopting the technical solution proposed in this scheme, the arching phenomenon occurring in the material bin can be more effectively eliminated under the condition of a simple structural design of the material bin.

[0008] In view of the above problems, a material bin, a concrete raw material system and a material arch breaking method provided by the present invention solve the problems through the following technical key points: A material bin includes a material bin body and an arch breaking mechanism installed on the material bin body. The arch breaking mechanism includes a rotating shaft and a rotating drive device, and the rotating drive device is used to drive the rotating shaft to rotate around the axis of the rotating shaft;

[0009] The rotating shaft is a hollow shaft, and further includes an air outlet hole communicated with the internal space of the rotating shaft;

[0010] The air outlet hole is located inside the material bin body, the outlet end of the air outlet hole faces the inner wall of the material bin body, and the air outlet hole can rotate with the rotating shaft.

[0011] In the prior art, during the discharging process of a conventional storage container, caking is very likely to occur in the direct direction of the discharge port. When the above caking occurs, the release of the material at the discharge port is interrupted, seriously affecting normal production and processing.

[0012] In view of the above problems, in the prior art, there have appeared methods such as manual knocking, applying vibration by a vibration motor, using an air cannon installed on a storage container, utilizing the vibration generated by the operation of the air cannon and / or the direct action on the material, directly acting on the caking position by a stirring mechanism, and surface modification method to achieve caking removal. However, the surface modification method is generally used for anti-caking and is not suitable for anti-caking of all materials.

[0013] However, taking the concrete production industry as an example, materials such as sand and mineral powder in concrete itself have the characteristics of high density, high humidity, rough surface, and relatively high surface free energy; at the same time, they have the characteristics of rough surface and large relative sliding resistance; with the expansion of the scale of existing enterprises, the volumes of mineral powder bins and sand bins are also increasing continuously: the storage capacity of such common bins can reach more than 2000T, and in order to reduce the floor area, the height is also increasing continuously, and the common height is about 10m (diameter 8 - 10m). At the same time, considering the manufacturing cost of the corresponding bins and the possibility of reusing them in different places, these bins are mostly set as a structure spliced by plates and profiles. If the traditional vibration arch breaking method is adopted, due to reasons such as storage volume and density, in order to achieve the vibration effect, the vibration energy required to be input is relatively large, the energy consumption is high, and the requirements for the power source equipment are high; without considering the vibration input cost and power consumption, due to reasons such as storage volume and density, a relatively large energy input has a greater impact on the structural strength of the bin itself, higher requirements for the structural strength of the bin itself, higher requirements for the reliability of the constraints on the bin itself, and even a large vibration energy input to the bin may cause the bin to collapse, etc., there are relatively large safety hazards. Therefore, the existing blasting vibration method, air cannon arch breaking method, and mechanical vibration arch breaking method are not applicable to the development of industries such as concrete production sites.

[0014] Regarding the arch-breaking method in which airflow directly acts on materials, such as the common method of installing an air cannon at a fixed position on the outer wall of the silo, due to the high thickness of the existing common material accumulation layer (the storage space height in the corresponding silo in the concrete industry can reach more than 10m), high material density and high humidity (for example, when the moisture content of fly ash powder reaches about 20%, the adhesion between the fly ash powder and the silo, and between the fly ash powders themselves is relatively large), the degree of compaction in the material accumulation layer is relatively large after the unloading process is interrupted due to arch formation. If the airflow directly acts on the material to break the arch, the force of the gas on the local position of the material may further cause the material to be further compacted, aggravating the blockage.

[0015] In response to the above problems, this solution provides a technical solution for achieving arch breaking based on the following concept: using gas as power to form a continuous jet action area in the material in a rotating jet manner, and using the jet action area as a cross-section of the compaction layer in the material to achieve material arch breaking. In the specific technical scheme, it is configured to include a rotating shaft that is a hollow shaft and the rotating shaft can rotate around its own axis under the action of a driving device. At the same time, an air outlet connected to the internal space of the rotating shaft is provided, and the outlet end of the air outlet faces the side wall of the material bin body, and the air outlet can rotate with the rotating shaft. In this way, if the air intake of the internal space of the rotating shaft is completed through a rotating joint, the air outlet will serve as an exhaust hole for the internal space. At a specific time, the action area of ​​the exhaust hole is linear along the direction of the air flow. In the process of the air outlet rotating with the rotating shaft, the gas discharged from the air outlet can form a continuous jet action area, expanding the jet action area from a line to a surface. The above jet action area can eventually form a cross-section in the material. When the cross-section reaches a certain area, the gravity of the material cooperates with the stirring interference of the airflow, and the material on the lower side of the cross-section collapses and / or the material on the upper side collapses, which is finally linked to the overall collapse of the material to achieve the purpose of arch formation and arch breaking.

[0016] Therefore, this solution can effectively avoid the existing pneumatic jet arch breaking method, which has unsatisfactory arch breaking effect and further compaction of materials due to material type, material properties, and excessively thick material layers. At the same time, a single air outlet can cover a rotation range. Considering the effective area, this solution also has the characteristics of simple structure and low setting cost.

[0017] As a person skilled in the art, the above-mentioned air outlet holes can be directly used as through holes set on the side wall of the rotating shaft; or through corresponding branch pipes, the branch pipes are connected to the internal space of the rotating shaft from any position of the rotating shaft, and finally the branch pipes and the rotating shaft rotate synchronously to form jet holes facing the outside of the rotating shaft, such as the exhaust pipe diversion scheme proposed below.

[0018] Meanwhile, considering the air outlet flow rate, the aperture of the air outlet hole is preferably set to be relatively large. To prevent the material from falling into the rotating shaft and affecting the jet, a through hole provided on the side wall of the rotating shaft is directly adopted for the air outlet hole. Considering processing difficulty and other issues, it is preferably that the air outlet hole is a straight hole and the outer end orifice is inclined downward. For the exhaust pipe drainage scheme proposed below, since the wall thickness of the exhaust pipe relative to the rotating shaft can be longer, the exhaust pipe can be set straight, the free end can be inclined downward, and the exhaust pipe can have a bent section, all of which can preferably prevent the material from entering the rotating shaft.

[0019] As a further technical solution of the material bin:

[0020] As a technical solution in structural design, by limiting the shape of the material bin body to prevent arching to a certain extent, and considering the common outlet position of the material bin body and the specific arching position, it is convenient to implement a technical solution where the cross-section is preferably located in the central area of the material bin body. It is set as follows: The material bin body is a columnar bin body with a cylindrical bin body section provided on the upper side and a conical bin body section provided on the lower side; the large end of the conical bin body section is connected to the lower end of the cylindrical bin body section; the rotating shaft is coaxial with the material bin body. Preferably, to further optimize the effect of the shape design of the material bin body on preventing arching, the conical bin body section adopts a multi-curve cone.

[0021] Considering the continuous increase in the design height of the existing material bin, the outlet is generally located at the lower end, and arching generally occurs at the lower end of the material bin. To reduce the energy consumption during the operation of the driving device, the length of the rotating shaft is preferably shortened as much as possible to avoid problems such as the rotating shaft being bent due to uneven lateral forces, reducing the difficulty of restraining the rotating shaft, and excessive force between the rotating shaft and the material during rotation resulting in damage to the rotating shaft and the driving device. It is set as follows: The material bin body is a vertical container with an outlet end provided at the lower end; the rotating shaft and the driving device are both installed inside the material bin body: the driving device is arranged at the position of the outlet end, and the rotating shaft is arranged above the driving device.

[0022] For the case where the compaction is not serious, to achieve arch breaking under the action of a vibration motor that can respond quickly within the allowable vibration power in this solution, it is set as follows: The arch-breaking mechanism further includes a plurality of vibration motors installed on the material bin body. In specific applications, the air outlet hole pneumatic arch breaking can also be combined with the operation of the vibration motor to achieve efficient and reliable arch breaking under the action of the cross-section.

[0023] To form multiple cross-sections in the height direction of the material layer to improve the arch-breaking efficiency and reduce the input of arch-breaking power, it is set as follows: The number of the air outlet holes is multiple; and along the axis direction of the rotating shaft, there are multiple air outlet holes arranged at intervals. Considering the material types and storage conditions in the existing concrete production industry, the interval between two adjacent air outlet holes is preferably set to be 1 - 2m along the axis direction of the rotating shaft.

[0024] As a device that can utilize the exhaust pipe to form a shearing and stirring effect and prevent materials from entering the rotating shaft, and can flexibly adjust the range of the shearing and stirring effect area and the range of the jetting effect area according to the specific arching situation, and in unnecessary cases, reduce the influence of the exhaust pipe on the material discharging and the power loss of the driving device by shortening the exhaust pipe, it is provided that: it further includes an exhaust pipe with one end connected to the rotating shaft and the internal space communicating with the internal space of the rotating shaft, and the other end opening of the exhaust pipe serves as the outlet end; the length of the exhaust pipe is adjustable.

[0025] As a technical solution that can linearly adjust the length of the exhaust pipe by controlling the rotation speed of the rotating shaft and the amount of intake air, so as to simplify the internal structure design of the material bin and facilitate the discharging resistance of the material bin while achieving the adjustment purpose, it is provided that: the exhaust pipe is of a multi-section series-connected structure: composed of multiple straight pipe sections connected in series in sequence; any two straight pipe sections in cooperation are in an insertion fit relationship; any two straight pipe sections in cooperation can slide relative to each other along the axis direction of the straight pipe section; a return spring is provided between any two straight pipe sections in cooperation, and the return spring can elastically deform in the axis direction of the straight pipe section; the return spring is stretched when the length of the exhaust pipe increases, and the return spring serves as the power source for the automatic shortening of the length of the exhaust pipe. In the specific application of this solution, for example, by adjusting the rotation speed of the rotating shaft, different centrifugal forces are generated on the outer straight pipe section, and finally the return spring has different elongation lengths, achieving the purpose of adjustable exhaust pipe length; similarly, by controlling the gas injection amount of the rotating shaft and using the gas pressure acting on the end of the outer straight pipe section, the purpose of adjustable exhaust pipe length is achieved. For the series-connected design proposed in this solution, when considering the axial seal between adjacent two straight pipe sections, it is preferably sealed with a filler made of polytetrafluoroethylene. In this way, not only can the axial seal better adapt to the working vibration, but also it has the characteristics of relatively wear-resistant and low use cost after the material enters the sliding surface.

[0026] When the rotating shaft rotates, it is necessary to push the materials in a local area to destroy the stress environment in the materials, which is beneficial to realize arch breaking. At the same time, by using the existing components on it, the anti-deformation ability of the spiral blade is enhanced while reducing the strength requirement of the spiral blade. It is set as follows: It also includes a spiral blade fixed on the rotating shaft and extending spirally along the axis of the rotating shaft; the exhaust pipe is fixedly connected or in contact with the suspended part of the spiral blade, and the exhaust pipe serves as an anti-deformation restraint for the spiral blade. In specific applications, for the fixed connection situation, the exhaust pipe can be arranged on any side of the spiral blade. For the cooperation method where they are only in contact and can only form a unilateral support force for the spiral blade, the exhaust pipe can be arranged on the back side of the compression surface of the spiral blade at its position. Considering the influence of the exhaust pipe on the discharge resistance, it is preferably to arrange the exhaust pipe on the side where the compression surface of the spiral blade is located at its position, that is, the spiral blade and the exhaust pipe are connected by welding.

[0027] This solution also discloses a concrete raw material system, including a raw material bin for storing powder or granular raw materials, and the raw material bin is the material bin described in any one of the above. This solution provides a specific application of the above material bin. When specifically applied, the material bin is used to store fine aggregates and powder raw materials. However, the above material bin is not limited to storing concrete production raw materials, such as for flour processing and temporary storage of lime powder in other fields.

[0028] This solution also discloses a method for breaking the arch of materials. This method is used to break the arch of stored materials. This method uses gas as the power to form a continuous jet action area in the materials in the way of rotating jet, and uses the jet action area as the sectional plane of the compacted layer in the materials to realize the arch breaking of the materials. As described above, by using this method, under the condition of simple structure, the arch breaking of the materials can be completed reliably and efficiently, and it is not limited to the problems caused by the existing storage methods and material types: using gas as the power source cannot effectively break the arch or even cause the materials to be further compacted.

[0029] The present invention has the following beneficial effects:

[0030] A technical solution for arch breaking based on the following concept is provided: Gas is used as the power, and a continuous jet action area is formed in the material in the way of rotary jetting. The jet action area is used as the sectional plane of the compacted layer in the material to achieve arch breaking of the material. In the specific technical solution, the rotating shaft is set to be a hollow shaft, and the rotating shaft can rotate around its own axis under the action of a driving device. At the same time, an air outlet connected to the internal space of the rotating shaft is provided, and the outlet end of the air outlet faces the side wall of the material bin body, and the air outlet holes can rotate with the rotating shaft. In this way, if the internal space of the rotating shaft is filled with gas through a rotary joint, the air outlet holes serve as the exhaust holes of the internal space. At a specific time, the action area of the exhaust holes is linear along the air flow direction. During the rotation of the air outlet holes with the rotating shaft, the gas discharged from the air outlet holes can form a continuous jet action area, and the jet action area is expanded from a line to a surface. The above jet action area can finally form a sectional plane in the material. When the sectional plane reaches a certain area, the gravity of the material cooperates with the agitation interference of the air flow, and the material below the sectional plane collapses and / or the material above the sectional plane collapses, and finally the overall collapse of the material is chained to achieve the purpose of arch breaking and arch removal.

[0031] Therefore, by adopting this solution, it is possible to effectively avoid the situation where the existing pneumatic jet arch breaking method has unsatisfactory arch breaking effect and further compacts the material due to the material type, material properties, and excessive material layer thickness. At the same time, a single air outlet hole can cover a full rotation range. Considering the action area, this solution also has the characteristics of simple structure and low setting cost.

[0032] As a person skilled in the art, the above air outlet holes can directly adopt through holes provided on the side wall of the rotating shaft; or through corresponding branch pipes, the branch pipes are connected to the internal space of the rotating shaft at any position of the rotating shaft, and finally the branch pipes rotate synchronously with the rotating shaft to form jet holes facing the outside of the rotating shaft, such as the exhaust pipe drainage solution proposed below.

[0033] At the same time, considering the air outlet flow rate problem, the aperture of the air outlet holes is preferably set to be relatively large. To avoid the material falling into the rotating shaft and affecting the jetting, for the solution of directly adopting through holes provided on the side wall of the rotating shaft for the air outlet holes, considering processing difficulties and other issues, it is preferably that the air outlet holes are straight holes and the outer end orifice is inclined downward; for the exhaust pipe drainage solution proposed below, since the exhaust pipe can have a longer wall thickness relative to the rotating shaft, the exhaust pipe can be set straight, the free end is inclined downward, and the exhaust pipe has a bent section, which can all preferably achieve the purpose of preventing the material from entering the rotating shaft. Description of the Drawings

[0034] Figure 1 It is a schematic structural diagram of a specific embodiment of a material bin according to this solution. In this schematic diagram, the rotating shaft is a smooth rod;

[0035] Figure 2It is a schematic structural diagram of a specific embodiment of a material bin described in this solution. In this schematic diagram, an exhaust pipe and a spiral blade are installed on the rotating shaft;

[0036] Figure 3 It is Figure 1 a partial enlarged view of part A shown;

[0037] Figure 4 It is Figure 2 a partial enlarged view of part B shown;

[0038] Figure 5 It is a cross-sectional view of the exhaust pipe in a specific embodiment of a material bin described in this solution.

[0039] The reference numerals in the drawings are respectively: 1, material bin body; 2, vibration motor; 3, rotating shaft; 4, air outlet hole; 5, driving device; 6, exhaust pipe; 7, spiral blade; 8, straight pipe section; 9, return spring. Specific embodiments

[0040] The present invention will be further described in detail below in conjunction with embodiments, but the present invention is not limited to the following embodiments:

[0041] Embodiment 1:

[0042] As Figures 1 to 5 shown, a material bin includes a material bin body 1 and an arch-breaking mechanism installed on the material bin body 1. The arch-breaking mechanism includes a rotating shaft 3 and a driving device 5. The driving device 5 is used to drive the rotating shaft 3 to rotate around the axis of the rotating shaft 3;

[0043] The rotating shaft 3 is a hollow shaft, and further includes an air outlet hole 4 communicated with the internal space of the rotating shaft 3;

[0044] The air outlet hole 4 is located inside the material bin body 1. The outlet end of the air outlet hole 4 faces the inner wall of the material bin body 1, and the air outlet hole 4 can rotate with the rotating shaft 3.

[0045] In the prior art, during the discharging process of a conventional storage container, it is very easy to form an arch directly in front of the discharging port. When the above arch is formed, the release of the material at the discharging port is interrupted, seriously affecting normal production and processing.

[0046] In view of the above problems, in the prior art, there have appeared methods such as manual knocking, applying vibration by a vibration motor 2, using an air cannon installed on the storage container, utilizing the vibration generated by the operation of the air cannon and / or the direct action on the material, directly acting on the arching position by a stirring mechanism, and surface modification method to achieve arch removal. However, the surface modification method is generally used for anti-arching and is not suitable for anti-arching of all materials.

[0047] However, taking the concrete production industry as an example, materials such as sand and mineral powder in concrete itself have the characteristics of high density, high humidity, rough surface, and relatively high surface free energy; at the same time, they have the characteristics of rough surface and large relative sliding resistance; with the expansion of the scale of existing enterprises, the volumes of mineral powder silos and sand silos are also increasing continuously: the storage capacity of such common silos can reach more than 2000T, and to reduce the floor area, the height is also increasing continuously, and the common height is about 10m (diameter 8 - 10m). At the same time, considering the manufacturing cost of the corresponding silos and the possibility of reusing them elsewhere, these silos are mostly set as a structure spliced by plates and profiles. If the traditional vibration arch breaking method is adopted, due to reasons such as storage volume and density, to achieve the vibration effect, a large amount of vibration energy needs to be input, resulting in high energy consumption and high requirements for power source equipment; without considering the vibration input cost and power consumption, due to reasons such as storage volume and density, the large energy input has a greater impact on the structural strength of the silo itself, higher requirements for the structural strength of the silo itself, and higher requirements for the reliability of the constraints on the silo itself. Even the large vibration energy input for the silo may cause the silo to collapse, etc., presenting relatively large potential safety hazards. Therefore, the existing blasting vibration method, air cannon arch breaking method, and mechanical vibration arch breaking method are not suitable for the development of industries such as concrete production sites.

[0048] Regarding the arch breaking method in which the air flow directly acts on the material, such as commonly installing air cannons at fixed positions on the outer wall of the silo. Due to the relatively high thickness of the existing common material accumulation layer (the storage space height in the corresponding silos in the concrete industry can reach more than 10m), large material density and high humidity (when the moisture content of coal ash powder reaches about 20%, the adhesion between the coal ash powder and the silo and between the coal ash powders is relatively large). After the discharge process is interrupted due to arching, the degree of compaction in the material accumulation layer is relatively large. When using the arch breaking method in which the air flow directly acts on the material, the force of the gas on a local position of the material may further cause the material to be further compacted, exacerbating the silo blockage situation.

[0049] In view of the above problems, this solution provides a technical solution for arch breaking based on the following concept: using gas as the power, a continuous jet action area is formed in the material in the way of rotary jetting, and the jet action area is used as the sectional plane of the compacted layer in the material to achieve arch breaking of the material. In the specific technical solution, the rotating shaft 3 is set to be a hollow shaft, and the rotating shaft 3 can rotate around its own axis under the action of the driving device 5. At the same time, an air outlet connected to the internal space of the rotating shaft 3 is provided, and the outlet end of the air outlet faces the side wall of the material bin body 1, and the air outlet holes 4 can rotate with the rotating shaft 3. In this way, if the internal space of the rotating shaft 3 is introduced with air through a rotary joint, the air outlet holes 4 serve as the exhaust holes of the internal space. At a specific time, the action area of the exhaust holes is linear along the air flow direction. During the rotation of the air outlet holes 4 with the rotating shaft 3, the gas discharged from the air outlet holes 4 can form a continuous jet action area, and the jet action area is expanded from a line to a surface. The above jet action area can finally form a sectional plane in the material. When the sectional plane reaches a certain area, the gravity of the material cooperates with the agitation interference of the air flow, and the material below the sectional plane collapses and / or the material above the sectional plane collapses, and finally the overall collapse of the material is chained to achieve the purpose of arch breaking and arch destruction.

[0050] Therefore, by adopting this solution, it is possible to effectively avoid the unsatisfactory arch breaking effect and the further compaction of the material caused by the material type, material properties, and too thick material layer in the existing pneumatic jet arch breaking method. At the same time, a single air outlet hole 4 can cover the rotation range of one week. Considering the action area, this solution also has the characteristics of simple structure and low setting cost.

[0051] As a person skilled in the art, the above air outlet holes 4 can directly adopt through holes provided on the side wall of the rotating shaft 3; or through corresponding branch pipes, the branch pipes are connected to the internal space of the rotating shaft 3 at any position of the rotating shaft 3, and finally the branch pipes rotate synchronously with the rotating shaft 3 to form jet holes facing the outside of the rotating shaft 3, such as the exhaust pipe 6 diversion solution proposed below.

[0052] At the same time, considering the air outlet flow problem, the aperture of the air outlet holes 4 is preferably set to be relatively large. To avoid the material falling into the rotating shaft 3 and affecting the jetting, for the solution of directly adopting through holes provided on the side wall of the rotating shaft 3 for the air outlet holes 4, considering processing difficulty and other issues, it is preferably that the air outlet holes 4 are straight holes and the outer end orifice is inclined downward; for the exhaust pipe 6 diversion solution proposed below, since the wall thickness of the exhaust pipe 6 relative to the rotating shaft 3 can be longer, the exhaust pipe 6 can be set straight, the free end is inclined downward, and the exhaust pipe 6 has a bent section, which can preferably achieve the avoidance of the material entering the rotating shaft 3.

[0053] Embodiment 2:

[0054] This embodiment is further optimized on the basis of Embodiment 1:

[0055] As a technical solution in terms of structural design, by limiting the shape of the material bin body 1 to prevent arching to a certain extent, and considering the common outlet position of the material bin body 1 and the specific arching position, it is convenient to make the sectional plane as much as possible located in the central area of the material bin body 1. It is set as follows: the material bin body 1 is a columnar bin body with a cylindrical bin body section arranged on the upper side and a conical bin body section arranged on the lower side; the large end of the conical bin body section is connected to the lower end of the cylindrical bin body section; the rotating shaft 3 is coaxial with the material bin body 1. Preferably, to further optimize the effect of the shape design of the material bin body 1 on preventing arching, the conical bin body section adopts a multi-curve cone body.

[0056] Embodiment 3:

[0057] This embodiment is further optimized on the basis of Embodiment 1:

[0058] Considering that the design height of the existing material bin is increasing continuously, the outlet is generally located at the lower end, and arching generally occurs at the lower end of the material bin. To reduce the energy consumption during the operation of the driving device, the length of the rotating shaft 3 is shortened as much as possible to avoid problems such as the rotating shaft 3 being bent by uneven lateral forces, reducing the difficulty of restraining the rotating shaft 3, and the excessive force between the rotating shaft 3 and the material during rotation causing damage to the rotating shaft 3 and the driving and rotating device 5. It is set as follows: the material bin body 1 is a vertical container with an outlet end at the lower end; the rotating shaft 3 and the driving and rotating device 5 are both installed inside the material bin body 1: the driving and rotating device 5 is arranged at the position of the outlet end, and the rotating shaft 3 is arranged above the driving and rotating device 5.

[0059] Embodiment 4:

[0060] This embodiment is further optimized on the basis of Embodiment 1:

[0061] For the case where the compaction is not serious, to achieve arch breaking under the action of a vibration motor that can respond quickly within the allowable vibration power in this solution, it is set as follows: the arch-breaking mechanism further includes a plurality of vibration motors 2 installed on the material bin body 1. In specific applications, pneumatic arch breaking through the air outlet 4 can also be combined with the operation of the vibration motor. To achieve efficient and reliable arch breaking under the action of the sectional plane.

[0062] Embodiment 5:

[0063] This embodiment is further optimized on the basis of Embodiment 1:

[0064] In order to form multiple cross-sections in the height direction of the material layer to improve the arch-breaking efficiency and reduce the input of arch-breaking power, it is set that: the number of the air outlet holes 4 is multiple; and along the axis direction of the rotating shaft 3, there are multiple air outlet holes 4 arranged at intervals. Considering the material types and storage conditions in the existing concrete production industry, along the axis direction of the rotating shaft 3, the interval between two adjacent air outlet holes 4 is preferably set to 1-2m.

[0065] Embodiment 6:

[0066] This embodiment is further optimized on the basis of Embodiment 1:

[0067] As a technical solution that can utilize the exhaust pipe 6 to form a shearing and stirring effect and prevent materials from entering the rotating shaft 3, and can flexibly adjust the range of the shearing and stirring action area and the range of the jet action area according to the specific arching situation, and in unnecessary cases, reduce the influence of the exhaust pipe 6 on the material discharge and the power loss of the driving device 5 by shortening the exhaust pipe 6, it is set that: it further includes an exhaust pipe 6 with one end connected to the rotating shaft 3 and the internal space communicating with the internal space of the rotating shaft 3, and the other end pipe orifice of the exhaust pipe 6 is used as the outlet end; the length of the exhaust pipe 6 is adjustable.

[0068] As a technical solution that can linearly adjust the length of the exhaust pipe 6 by controlling the rotation speed of the rotating shaft 3 and controlling the amount of intake air, so as to simplify the internal structure design of the material bin and facilitate the discharge resistance of this material bin on the premise of achieving the adjustment purpose, it is set that: the exhaust pipe 6 is a multi-section series-connected structure: it is composed of multiple straight pipe sections 8 connected in series in sequence; any two mutually matching straight pipe sections 8 are in an insertion and matching relationship; any two mutually matching straight pipe sections 8 can slide relative to each other along the axis direction of the straight pipe section 8; a return spring 9 is arranged between any two mutually matching straight pipe sections 8, and the return spring 9 can elastically deform in the axis direction of the straight pipe section 8; the return spring 9 is stretched when the length of the exhaust pipe 6 increases, and the return spring 9 serves as the power source for the automatic shortening of the length of the exhaust pipe 6. In the specific application of this solution, for example, by adjusting the rotation speed of the rotating shaft 3, different centrifugal forces are generated on the outer straight pipe section 8, and finally the return spring 9 has different stretching lengths to achieve the purpose of adjustable length of the exhaust pipe 6; similarly, by controlling the gas injection amount of the rotating shaft 3, the gas pressure acting on the end of the outer straight pipe section 8 is utilized to achieve the purpose of adjustable length of the exhaust pipe 6. For the series-connected design proposed in this solution, when considering the axial seal between two adjacent straight pipe sections 8, it is preferably sealed with a filler made of polytetrafluoroethylene. In this way, not only can the axial seal better adapt to the working vibration, but also it has the characteristics of relatively wear-resistant and low use cost after the material enters the sliding surface.

[0069] When the rotating shaft 3 rotates, it is necessary to push the materials in the local area to destroy the stress environment in the materials, which is beneficial to realizing arch breaking. At the same time, by using the existing components on it, while reducing the strength requirements for the spiral blade 7, the anti-deformation ability of the spiral blade 7 is enhanced. It is set as follows: It also includes a spiral blade 7 fixed on the rotating shaft 3 and extending spirally along the axis of the rotating shaft 3. The exhaust pipe 6 is fixedly connected to or in contact with the suspended part of the spiral blade 7, and the exhaust pipe 6 serves as an anti-deformation restraint for the spiral blade 7. In specific applications, for the fixed connection situation, the exhaust pipe 6 can be arranged on any side of the spiral blade 7. For the cooperation method where they are only in contact and can only form a unilateral support force for the spiral blade 7, the exhaust pipe 6 can be arranged on the back side of the compression surface of the spiral blade 7 at its position. Considering the influence of the exhaust pipe 6 on the discharging resistance, it is preferably to arrange the exhaust pipe 6 on the side where the compression surface of the spiral blade 7 is located at its position, that is, the spiral blade 7 and the exhaust pipe 6 are connected by welding.

[0070] Embodiment 7:

[0071] This embodiment provides a specific application method of Embodiment 1:

[0072] This embodiment provides a concrete raw material system, including a raw material bin for storing powder or granular raw materials, and the raw material bin is the material bin described in Embodiment 1. This solution provides a specific application of more than one material bin. In specific applications, the material bin is used to store fine aggregate, powder raw materials, etc. However, the above material bins are not limited to being used for the storage of concrete production raw materials, such as for flour processing, temporary storage of lime powder in other fields, etc.

[0073] Embodiment 8:

[0074] This embodiment provides the same idea of material arch breaking as Embodiment 1:

[0075] This embodiment provides a method for breaking the arch of materials. This method is used to break the arch of stored materials. This method uses gas as the power and forms a continuous jet action area in the materials in the way of rotating jet, and uses the jet action area as the sectional plane of the compacted layer in the materials to realize material arch breaking. As described above, by using this method, under the condition of simple structure, the material arch breaking can be completed reliably and efficiently, and it is not limited to the problems caused by the existing storage methods and material types, that is, using gas as the power source cannot effectively break the arch or even cause the materials to be further compacted.

[0076] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific embodiments of the present invention are only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, other embodiments obtained without departing from the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A material bin, comprising a material bin body (1) and an arch-breaking mechanism installed on the material bin body (1), characterized in that, The arch-breaking mechanism includes a rotating shaft (3) and a driving and rotating device (5), and the driving and rotating device (5) is used to drive the rotating shaft (3) to rotate around the axis of the rotating shaft (3); The rotating shaft (3) is a hollow shaft, and further includes an air outlet hole (4) communicated with the internal space of the rotating shaft (3); The air outlet hole (4) is located inside the material bin body (1), the outlet end of the air outlet hole (4) faces the inner wall of the material bin body (1), and the air outlet hole (4) can rotate with the rotating shaft (3); It further includes an exhaust pipe (6) with one end connected to the rotating shaft (3) and the internal space communicated with the internal space of the rotating shaft (3), and the other end pipe orifice of the exhaust pipe (6) serves as the outlet end; the length of the exhaust pipe (6) is adjustable; The exhaust pipe (6) is of a multi-section series connection structure: composed of a plurality of straight pipe sections (8) connected in series in sequence; any two mutually cooperating straight pipe sections (8) are in an insertion fit relationship; any two mutually cooperating straight pipe sections (8) can slide relative to each other along the axis direction of the straight pipe section (8); a return spring (9) is arranged between any two mutually cooperating straight pipe sections (8), and the return spring (9) can elastically deform in the axis direction of the straight pipe section (8); the return spring (9) is stretched when the length of the exhaust pipe (6) increases, and the return spring (9) serves as the power source for the automatic shortening of the length of the exhaust pipe (6); By adjusting the rotation speed of the rotating shaft (3), different centrifugal forces are generated on the outer straight pipe section (8), and finally the return spring (9) has different elongation lengths, achieving the purpose of adjustable length of the exhaust pipe (6); by controlling the gas injection amount of the rotating shaft (3), using the gas pressure acting on the end of the outer straight pipe section (8), the purpose of adjustable length of the exhaust pipe (6) is achieved; It further includes a spiral blade (7) fixed on the rotating shaft (3) and extending spirally along the axis of the rotating shaft (3); the exhaust pipe (6) is fixedly connected to or in contact with the suspended part of the spiral blade (7), and the exhaust pipe (6) serves as an anti-deformation restraint for the spiral blade (7); Along the axis direction of the rotating shaft (3), the interval between adjacent two air outlet holes (4) is set to be 1-2 m.

2. The material bin according to claim 1, characterized in that, The material bin body (1) is a columnar bin body with a cylindrical bin body section arranged on the upper side and a conical bin body section arranged on the lower side; the large end of the conical bin body section is connected to the lower end of the cylindrical bin body section; the rotating shaft (3) is coaxial with the material bin body (1).

3. A material bin according to claim 1, characterized in that, The material bin body (1) is a vertical container with an outlet end arranged at the lower end; the rotating shaft (3) and the driving and rotating device (5) are both installed inside the material bin body (1): the driving and rotating device (5) is arranged at the outlet end position, and the rotating shaft (3) is arranged above the driving and rotating device (5).

4. A material bin according to claim 1, characterized in that, The arch-breaking mechanism further includes a plurality of vibration motors (2) installed on the material bin body (1).

5. A material bin according to claim 1, characterized in that, The number of the air outlet holes (4) is multiple; and along the axis direction of the rotating shaft (3), there are multiple air outlet holes (4) arranged at intervals.

6. Concrete raw material system, including a raw material silo for storing powder or granular raw materials, characterized in that, The raw material bin is the material bin according to any one of claims 1 to 5.

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