Automatic feeding system for emulsified granular ammonium nitrate fuel oil explosive raw materials

Abstract

The invention relates to an automatic emulsified granular ammonium nitrate fuel oil explosive raw material feeding system which comprises a feeding box, a feeding hopper connected to the top of the feeding box and a receiving device arranged on the feeding hopper and further comprises a screening mechanism. The screening mechanism is arranged on the feeding box and comprises a swing assembly arranged on the side face of the feeding box, a screen assembly arranged on the swing assembly, two collecting assemblies arranged on the feeding box, sweeping assemblies arranged on the collecting assemblies and a restraining assembly arranged on the swing assembly. The feeding mechanism is arranged to be matched with the screening mechanism, so that the uniform and stable continuous screening process of the raw materials is achieved, and the technical problem that the continuous and stable operation of the feeding system is restricted due to the bridging phenomenon caused by accumulation in the screening procedure of raw material feeding due to the poor fluidity of the materials is solved.

Description

Technical Field

[0001] This invention relates to the field of automatic feeding technology for emulsified granular ammonium nitrate explosive raw materials, and particularly to an automatic feeding system for emulsified granular ammonium nitrate explosive raw materials. Background Technology

[0002] Emulsified granular ammonium nitrate explosive raw materials are not ordinary industrial bulk materials. They are quasi-explosive mixtures with strong hygroscopic and agglomerating properties, which are prone to generating static electricity and explosive dust and are relatively sensitive to friction, heat and impact. Therefore, the raw materials transported to the factory in ton bags must be safely and stably fed through reasonable procedures to avoid the risk of explosion during the ton bag cutting, collection and screening and polymer crushing stages.

[0003] Chinese patent CN220766862U discloses a feeding device for the safe production of porous granular ammonium nitrate explosives, including a machine body. The machine body is provided with a feeding structure for the safe production of porous granular ammonium nitrate explosives. The feeding structure for the safe production of porous granular ammonium nitrate explosives includes a first outer shell. The lower surface of the first outer shell is fixedly connected to the upper surface of the machine body. A long rod passes through a limiting plate and the first outer shell and is sleeved with the limiting plate and the first outer shell. The limiting plate is fixedly connected to the inner wall of the first outer shell.

[0004] However, in the existing technology, the raw materials for ammonium nitrate explosives have high surface roughness, resulting in poor material flowability. This leads to a significant process load in the screening process of raw material feeding. Once raw material accumulation occurs in the screening stage, causing a "bridging" phenomenon, raw materials of different particle sizes will simultaneously flow into the large particle crushing unit, triggering a series of process risks. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an automatic feeding system for emulsified granular ammonium nitrate explosive raw materials. By setting up a feeding mechanism in conjunction with a screening mechanism, a uniform and stable continuous screening process for the raw materials is achieved. This solves the technical problem of poor material flowability and accumulation during the screening process of raw material feeding, which leads to "bridging" and restricts the continuous and stable operation of the feeding system.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic feeding system for emulsified granular ammonium nitrate explosive raw materials, comprising a feeding box, a feeding hopper connected to the top of the feeding box, and a receiving device disposed on the feeding hopper, and further comprising: A screening mechanism is provided on a feeding box and includes a swing assembly provided on the side of the feeding box, a screen assembly provided on the swing assembly, two sets of collection assemblies provided on the feeding box, a cleaning assembly provided on the collection assembly, and a constraint assembly provided on the swing assembly. The raw materials are moved from the hopper to the feeding box. The screen assembly and the swing assembly together screen and convey the qualified raw materials downward. During the swing, the larger polymer raw materials stay in multiple recessed positions on the surface of the screen assembly and separate from the main raw materials. At this time, the constraint assembly controls the position of the main raw materials and discharges and collects the polymers through the collection assembly. Before resetting, the collection assembly drives the cleaning assembly to complete the self-cleaning.

[0007] Furthermore, the swing assembly includes a screening area opened in the feeding box, two sets of first motors connected to the feeding box and located on both sides of the screening area, a mounting frame connected to the output end of the first motor and located in the screening area, and a mounting slot opened on the mounting frame.

[0008] Furthermore, the screen assembly includes multiple sets of sliders connected in the mounting groove, two sets of magnetic suction parts respectively disposed at both ends of the mounting groove, multiple sets of first telescopic members connected between the sliders and the magnetic suction parts, support rods connected between the corresponding sliders and the magnetic suction parts, folded mesh connected between adjacent support rods, and multiple sets of sealing plates corresponding to the support rods and located in the mounting groove.

[0009] Furthermore, the constraint assembly includes a mounting ring that runs through one side of the feeding box and is sleeved on the corresponding first motor output end, a constraint plate connected to the mounting ring, multiple sets of rubber tassels disposed on both sides of the constraint plate, a mounting plate connected to the first motor output end, a second motor connected to the mounting plate and having a drive gear connected to its output end, and a drive gear ring connected to the mounting ring and meshing with the drive gear.

[0010] Furthermore, the collection assembly includes two sets of first electromagnetic terminals symmetrically arranged on the feeding box and used for magnetic connection with the magnetic suction part, a valve plate passing through the feeding box, a U-shaped frame passing through the valve plate and connected to one side of the valve plate via a second telescopic member, second electromagnetic terminals arranged at both ends of the U-shaped frame and used for magnetic connection with the magnetic suction part, a collection rack connected to the feeding box, a first drive cylinder connected to the collection rack and whose output end is connected to the valve plate, and a slot opened on the collection rack.

[0011] Furthermore, the cleaning assembly includes a follower frame connected to the collection frame via a third telescopic member, a first drive shaft connected to the follower frame and having a cleaning roller connected to its end, a second drive shaft connected to the follower frame and having a first gear connected to it, bevel gears respectively connected to the first drive shaft and the second drive shaft and meshing with each other, and a first rack connected to the collection frame and meshing with the first gear.

[0012] Furthermore, an automatic feeding system for emulsified granular ammonium nitrate explosive raw materials also includes: A feeding mechanism, wherein the feeding mechanism is disposed on a feeding hopper and includes a material control component disposed on the feeding hopper, a gripping component disposed on the material control component, and a material unloading component disposed on the gripping component; After the raw material is placed in the receiving device, the gripping component separates the surface layer of the stacked raw material by clamping it, and the material control component drives the gripping component to move towards the upward material box. Then, the unloading component releases the limit of the gripping component, and the raw material falls to the screening mechanism.

[0013] Furthermore, the material control assembly includes a second drive cylinder connected to the feeding hopper, a support plate connected to the feeding hopper and connected to the output end of the second drive cylinder, a third drive cylinder connected to the support plate, and a mounting platform connected to the output end of the third drive cylinder and located above the receiving device.

[0014] Furthermore, the gripping component includes a fourth drive cylinder connected to the mounting platform, a ventilation frame connected to the output end of the fourth drive cylinder, an air pump connected to the support plate and whose output end is connected to the ventilation frame, and multiple sets of expansion members connected to the ventilation frame and penetrating the mounting platform. The expansion member includes a branch pipe connected to the ventilation frame and having a conical seat at its end, a through hole opened on the branch pipe, and an expansion membrane disposed on the branch pipe and covering the through hole.

[0015] Furthermore, the unloading assembly includes multiple crescent-shaped holes opened on the ventilation frame, multiple exhaust pipes connected to the ventilation frame and corresponding to the crescent-shaped holes, a second gear connected to the exhaust pipes, and a second rack connected to the feeding hopper and meshing with the second gear.

[0016] The beneficial effects of this invention are as follows: (1) By setting the screen assembly to use multiple sets of folded mesh to form a multi-concave screening surface, the raw material stays for a longer time during the inclined rolling process, which effectively improves the screening effect. At the same time, large particle aggregates are trapped in the concave area and separated from the main screening raw material, realizing fine screening and classification, and avoiding qualified raw materials from entering the crushing unit and increasing the processing pressure.

[0017] (2) The present invention sets up a collection component that can periodically unfold into a flat inclined surface during the swinging process, and the collection component can quickly discharge the trapped polymer, avoiding the formation of "bridges" on the screen surface due to the accumulation of raw materials, thus ensuring the continuous and stable operation of the screening process.

[0018] (3) By setting the collection component to automatically clean the contact area between the valve plate and the mounting bracket before resetting, the present invention prevents dust and debris residue from affecting the sealing and movement accuracy, ensures long-term stable operation of the system, and reduces the frequency of manual cleaning and downtime.

[0019] (4) By setting up a feeding mechanism, the present invention adopts a batch hoisting feeding and segmented unloading method to avoid the situation where the raw materials accumulate and slide down the surface of the feeding hopper, causing large friction, static electricity, and local overheating, which increases the risk of explosion.

[0020] In summary, the present invention has the advantages of fine screening and strong anti-clogging ability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the constraint component structure of the present invention; Figure 4 This is a schematic diagram of the screen assembly structure of the present invention; Figure 5 This is a schematic diagram of the component structure for the present invention; Figure 6 This is a schematic diagram of the screen assembly of the present invention after it has been flattened. Figure 7 This is a schematic diagram of the cleaning component structure of the present invention; Figure 8 This is a schematic diagram of the feeding mechanism of the present invention; Figure 9 This is a schematic diagram of the unloading assembly structure of the present invention; Figure 10 This is a schematic diagram of the grabbing component structure of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] Example 1 like Figures 1 to 7 As shown, this embodiment provides an automatic feeding system for emulsified granular ammonium nitrate explosive raw materials, including a feeding box 100, a feeding hopper 200 connected to the top of the feeding box 100, and a receiving device 300 disposed on the feeding hopper 200, and further including: The screening mechanism 1 is disposed on the feeding box 100 and includes a swing assembly 11 disposed on the side of the feeding box 100, a screen assembly 12 disposed on the swing assembly 11, two sets of collection assemblies 13 disposed on the feeding box 100, a cleaning assembly 14 disposed on the collection assembly 13, and a constraint assembly 15 disposed on the swing assembly 11. The raw material moves from the hopper 200 to the feeding box 100. The screen assembly 12 and the swing assembly 11 together screen and convey the qualified raw material downward. During the swing, the larger polymer raw material stays in multiple recessed positions on the surface of the screen assembly 12 and separates from the main raw material. At this time, the constraint assembly 15 controls the position of the main raw material and discharges and collects the polymer through the collection assembly 13. Before resetting, the collection assembly 13 drives the cleaning assembly 14 to complete the self-cleaning.

[0025] In this embodiment, due to the high surface roughness of the raw material for ammonium nitrate explosives, the material flowability is poor, resulting in a significant process load during the screening process. If raw material accumulation occurs during screening, leading to a "bridging" phenomenon, raw materials of different particle sizes will simultaneously flow into the large particle crushing unit, causing a series of process risks: at best, it will cause a decrease in screening efficiency, directly restricting the continuous and stable operation of the feeding system; at worst, it will cause the large particle crushing device to bear an excessive crushing load, resulting in excessive temperature rise due to frictional heat inside the device, accompanied by a sharp increase in dust concentration. When the dust concentration reaches the explosion limit and meets the ignition conditions, it will induce a serious safety accident of dust explosion. Therefore, under the action of screening mechanism 1, the entire screening process is stable and continuous, greatly ensuring the safety of production.

[0026] It should be noted that the receiving device 300 consists of a hydraulic cylinder and a baffle, both of which are existing technologies and will not be described in detail here. It is used to control the raw materials within a certain area to facilitate intermittent feeding. The feeding hopper 200 is equipped with an air hammer, which drives the whole to vibrate to promote the feeding and screening process.

[0027] Furthermore, such as Figures 2 to 4 and Figures 6 to 7 As shown, the swing assembly 11 includes a screening area 111 opened in the feeding box 100, two sets of first motors 112 connected to the feeding box 100 and located on both sides of the screening area 111, a mounting frame 113 connected to the output end of the first motors 112 and located in the screening area 111, and a mounting groove 114 opened on the mounting frame 113. The screen assembly 12 includes multiple sets of sliders 121 connected in the mounting groove 114, two sets of magnetic suction parts 122 respectively disposed at both ends of the mounting groove 114, multiple sets of first telescopic members 123 connected between the sliders 121 and the magnetic suction parts 122, support rods 124 connected between the corresponding sliders 121 and the magnetic suction parts 122, folded mesh 125 connected between adjacent support rods 124, and multiple sets of sealing plates 126 corresponding to the support rods 124 and located in the mounting groove 114.

[0028] In this embodiment, by setting up a screening surface composed of multiple sets of folded meshes 125, firstly, the raw material stays longer when moving along the inclined direction, and will not fall from the top to the bottom quickly, thereby improving the screening effect; secondly, under the interception effect of the concave position, large particle aggregates will disperse and stay inside and separate from the screening body, thereby facilitating early removal and preventing them from occupying the screening space; in addition, by cooperating with the swing component 11, the process of inclined screening and removal of aggregates can be completed multiple times.

[0029] In detail, when the raw material enters the feeding box 100 from the feeding hopper 200, it first rolls along the inclined direction of the screen assembly 12 to complete the first screening. Since the total amount of raw material is greater than the amount that can be screened at one time, most of the raw material body reaches the lower edge position. The raw material that stays in the groove position of the folded mesh 125 is also screened during the vibration, leaving only the aggregate inside the groove. Then the aggregate removal work begins. The constraint assembly 15 limits the raw material body at the lower edge position by blocking. The first motor 112 drives the two sets of mounting brackets 113 to complete one rotation in the screening area 111 through the output end, so that the head and tail heights are reversed. At this time, the collection assembly 13 is started to stretch and flatten the folded mesh 125 part of the screen assembly 12, so that the aggregate is discharged and collected outward along the smooth inclined surface. As the collection assembly 13 is reset, the constraint assembly 15 also cancels the limitation on the remaining raw material, and the raw material rolls along the inclined direction of the screen assembly 12 to complete the next screening.

[0030] It should be noted that the number of swings and the time for removing aggregates are set according to the settings. The aggregates can be removed immediately after one swing, or the aggregates in the groove can be removed after multiple swings. The folded mesh 125 itself and the connection between it and the support rod 124 are all spindle connections. The sliding connection between the sealing plates 126 is kept in the same direction, and the inner contact position is provided with a sharp point, which can effectively prevent raw materials from getting stuck.

[0031] Furthermore, such as Figures 2 to 3 As shown, the constraint assembly 15 includes a mounting ring 151 that passes through one side of the feeding box 100 and is sleeved on the corresponding output end of the first motor 112, a constraint plate 152 connected to the mounting ring 151, multiple sets of rubber tassels 153 disposed on both sides of the constraint plate 152, a mounting plate 154 connected to the output end of the first motor 112, a second motor 156 connected to the mounting plate 154 and having a drive gear 155 connected to its output end, and a drive gear ring 157 connected to the mounting ring 151 and meshing with the drive gear 155.

[0032] In this embodiment, by setting the constraint component 15, when the swing component 11 drives the screen component 12 to rotate and discharge the aggregate, it can effectively prevent the raw material body from leaking, thereby reducing the pressure and energy consumption during subsequent processing of the aggregate raw material and reducing processing costs.

[0033] In detail, when it is necessary to remove the aggregates, the second motor 156 starts and drives the drive gear 155 connected to the output end to drive the drive gear ring 157 that meshes with it. Then, through the mounting ring 151, it drives the constraint plate 152 to turn to the side of the lower end of the screen assembly 12 where the raw materials are gathered. Afterwards, it rotates together with the swing assembly 11 and works with the rubber whiskers 153 to complete the limiting work of the raw material body. After the aggregates are discharged, it resets itself.

[0034] It should be noted that a damper is provided between the mounting ring 151 and the output end of the first motor 112, so that when the first motor 112 drives the swing assembly 11 to work, the constraint assembly 15 can also swing accordingly, thereby preventing obstruction to the screening of raw materials.

[0035] Furthermore, such as 2 and Figures 4 to 7 As shown, the collection assembly 13 includes two sets of first electromagnetic terminals 131 symmetrically arranged on the feeding box 100 and used for magnetic connection with the magnetic suction part 122, a valve plate 132 passing through the feeding box 100, a U-shaped frame 134 passing through the valve plate 132 and connected to one side of the valve plate 132 through a second telescopic member 133, second electromagnetic terminals 135 arranged at both ends of the U-shaped frame 134 and used for magnetic connection with the magnetic suction part 122, a collection rack 136 connected to the feeding box 100, a first drive cylinder 137 connected to the collection rack 136 and whose output end is connected to the valve plate 132, and a slot 138 opened on the collection rack 136.

[0036] In this embodiment, by setting the collection component 13 to drive the screen component 12 to extend and change, the aggregates separated by the screen component 12 are quickly discharged, ensuring the efficient operation of subsequent screening.

[0037] In detail, when the aggregates in the groove are removed, the first electromagnetic end 131 and the second electromagnetic end 135 are activated and connected to the upper and lower magnetic suction parts 122 by magnetic force, respectively. Then, the first drive cylinder 137 begins to retract, driving the valve plate 132 to move backward. Due to the supporting effect of the second telescopic member 133, the valve plate 132 drives the U-shaped frame 134 to move backward synchronously. Then, under the action of the U-shaped frame 134 and the connection between the second electromagnetic end 135 and the magnetic suction part 122, the folded net 125 is gradually stretched to flatten. In this state, the U-shaped frame 134 is in contact with the slot 138 and no longer moves. As the first drive cylinder 137 continues to contract, the valve plate 132 squeezes the second telescopic member 133 and moves out of position with the U-shaped frame 134, thereby opening the space between the valve plate 132 and the folded net 125. Then the aggregate is discharged outward along the flat surface of the folded net 125 and collected by the collection rack 136. Finally, the first drive cylinder 137 gradually resets, and the folded net 125 is also reset under the guidance of the sealing plate 126 and the contraction of the first telescopic member 123.

[0038] It should be noted that both the first electromagnetic end 131 and the second electromagnetic end 135 are controlled by an internal circuit. The first electromagnetic end 131 mainly fixes the upper end of the screen assembly 12, while the second electromagnetic end 135 pulls the lower end of the screen assembly 12, thereby flattening the surface of the screen assembly 12. Multiple sets of sliders 121 are used to ensure the stability of the position of the support rod 124 and the folded mesh 125.

[0039] Furthermore, such as Figures 5 to 7 As shown, the cleaning assembly 14 includes a follower frame 142 connected to the collection frame 136 via a third telescopic member 141, a first drive shaft 144 connected to the follower frame 142 and having a cleaning roller 143 connected to its end, a second drive shaft 146 connected to the follower frame 142 and having a first gear 145 connected to it, a bevel gear 147 connected to the first drive shaft 144 and the second drive shaft 146 respectively and meshing with each other, and a first rack 148 connected to the collection frame 136 and meshing with the first gear 145.

[0040] In this embodiment, by setting the cleaning component 14 to clean both ends of the inner side of the valve plate 132 during the discharge of the aggregate, the aggregate is effectively prevented from colliding with the valve plate 132 during output, and the generated powder stays at the joint position of the valve plate 132 and the mounting bracket 113, thereby ensuring stable operation during reset.

[0041] In detail, when the valve plate 132 begins to separate from the folding net 125 under the drive of the first drive cylinder 137, the valve plate 132 synchronously pushes the follower frame 142 to move and causes the third telescopic member 141 to retract. At the same time, the meshing transmission of the first gear 145 and the first rack 148 causes the second drive shaft 146 to rotate, which then drives the first drive shaft 144 and the cleaning roller 143 to rotate through the meshing of the bevel gear 147, cleaning the contact surface. When the valve plate 132 is reset, the cleaning assembly 14 is also reset through the third telescopic member 141.

[0042] It should be noted that the length of the cleaning roller 143 can be changed, so that the sealing plate 126 can be taken care of during the initial rotation.

[0043] Furthermore, such as Figure 2 and Figure 8 As shown, an automatic feeding system for emulsified granular ammonium nitrate explosive raw materials further includes: Feeding mechanism 2, which is disposed on feeding hopper 200 and includes a material control component 21 disposed on feeding hopper 200, a gripping component 22 disposed on material control component 21, and a unloading component 23 disposed on gripping component 22; After the raw material is placed at the receiving device 300, the gripping component 22 separates the surface part of the stacked raw material by clamping, and the material control component 21 drives the gripping component 22 to move towards the upward material box 100. Then, the unloading component 23 releases the limit of the gripping component 22, and the raw material falls to the screening mechanism 1.

[0044] In this embodiment, by setting up a feeding mechanism 2, the raw materials that originally slid into the feeding box 100 through the feeding hopper 200 are changed to a grouped hoisting feeding method. First, it ensures that the processing rate and time of the raw materials by the screening mechanism 1 are controllable. Second, since the raw materials of ammonium nitrate explosive have a high surface roughness, the accumulation and sliding process not only causes wear on the machine surface and affects the service life, but also generates static electricity and heats up during the friction process. The feeding method of the feeding mechanism 2 effectively avoids the accumulation of potential explosion risks.

[0045] Furthermore, such as Figure 2 and Figure 8 As shown, the material control assembly 21 includes a second drive cylinder 211 connected to the feeding hopper 200, a support plate 212 connected to the feeding hopper 200 and connected to the output end of the second drive cylinder 211, a third drive cylinder 213 connected to the support plate 212, and a mounting platform 214 connected to the output end of the third drive cylinder 213 and located above the receiving device 300.

[0046] In this embodiment, by setting the material control component 21 in conjunction with the receiving device 300, the raw materials falling from the ton bag can form a reasonable accumulation in the space of the receiving device 300, which facilitates the subsequent grabbing work.

[0047] In detail, after the ton bag is cut, the raw material enters the feeding hopper 200. With the cooperation of the mounting platform 214, the receiving device 300 cuts out a section of the raw material in the internal space.

[0048] Furthermore, such as Figures 8 to 10 As shown, the gripping component 22 includes a fourth drive cylinder 221 connected to the mounting platform 214, an air frame 222 connected to the output end of the fourth drive cylinder 221, an air pump 223 connected to the support plate 212 and whose output end is connected to the air frame 222, and multiple sets of expansion members 224 connected to the air frame 222 and penetrating the mounting platform 214; The expansion member 224 includes a branch pipe 2242 connected to the ventilation frame 222 and having a tapered seat 2241 at its end, a through hole 2243 opened on the branch pipe 2242, and an expansion membrane 2244 disposed on the branch pipe 2242 and covering the through hole 2243.

[0049] It is worth mentioning that by setting up an expansion member 224 that can undergo volume expansion and transformation, combined with the high roughness of the raw material itself, the raw material can be lifted and transported layer by layer, thereby preventing long-distance friction between the raw material and the device.

[0050] In detail, when the raw material is positioned in the receiving device 300, the fourth drive cylinder 221 is activated, squeezing the ventilation frame 222 through the output end, causing multiple sets of expansion members 224 to be inserted into the surface of the raw material. Then, the air pump 223 works to send airflow through the ventilation frame 222, branch pipe 2242, and through hole 2243 into the expansion membrane 2244 to expand it. The expanded expansion membrane 2244 fully squeezes the raw material to form a whole. Then, driven by the third drive cylinder 213, the raw material and the mounting platform 214 move upward together and leave the receiving device 300.

[0051] It should be noted that the output end of the air pump 223 is a spring tube for telescopic avoidance; the ventilator 222 has multiple one-way valves on the lateral part without expansion members 224 to isolate each set of expansion members 224 in the longitudinal direction; the expansion membrane 2244 is made of high tear-resistant silicone.

[0052] Example 2 like Figure 2 and Figures 8 to 9 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows: like Figure 2 and Figures 8 to 9 As shown, the unloading assembly 23 includes a plurality of crescent holes 231 opened on the ventilation frame 222, a plurality of exhaust pipes 232 connected to the ventilation frame 222 and corresponding to the crescent holes 231, a second gear 233 connected to the exhaust pipes 232, and a second rack 234 connected to the feeding hopper 200 and meshing with the second gear 233.

[0053] In this embodiment, by setting the unloading component 23, the raw material being hoisted is gradually released into the screening mechanism 1 inside the feeding box 100, thereby reducing the pressure of the first screening.

[0054] In detail, after the raw material and the mounting platform 214 move upward together and leave the receiving device 300, the bearing plate 212 drives the gripping component 22 to move upward towards the screening mechanism 1 under the drive of the second drive cylinder 211. When the longitudinal second set of expansion members 224 exceeds the vertical position of the receiving device 300, the second gear 233 corresponding to the longitudinal first set of expansion members 224 meshes with the second rack 234 on the feeding hopper 200, causing the exhaust pipe 232 to rotate 180° and align with the crescent hole 231, so that the gas in the expansion membrane 2244 is quickly discharged, canceling the compression of the raw material. Finally, the raw material at the corresponding position begins to fall, and after continuous movement, the first feeding process can be completed.

[0055] It should be noted that the amount of raw material remaining at the end is relatively small. It can be allowed to fall into the feeding box 100 during the shaking process by removing the receiving device 300. Dust suppression devices are installed inside and outside the feeding box 100 to work in conjunction with the collecting component 13 and the unloading component 23.

[0056] Work steps Step 1: Feeding. After the raw material is placed at the receiving device 300, the gripping component 22 separates the surface part of the stacked raw material by clamping it, and the material control component 21 drives the gripping component 22 to move towards the upward material box 100. Then the unloading component 23 releases the limit of the gripping component 22, and the raw material falls to the screening mechanism 1. Step 2, screening: When the raw material enters the feeding box 100 from the feeding hopper 200, it first rolls along the inclined direction of the screen assembly 12 to complete the first screening. Since the total amount of raw material is greater than the amount that can be screened at one time, most of the raw material body reaches the lower edge position, while the raw material that stays in the groove position of the folded mesh 125 is also screened during the vibration process, leaving only the aggregate inside the groove. Step 3, Removal of foreign matter: Next, the removal of aggregates begins. The constraint component 15 blocks and limits the raw material body at the lower edge. The swing component 11 drives the screen component 12 to complete one rotation in the screening area 111, so that the height of the head and tail are reversed. At this time, the collection component 13 is activated to stretch and flatten the folded mesh 125 part of the screen component 12, so that the aggregates are discharged and collected outward along the smooth slope. Step 4: Cleaning. When the collecting component 13 discharges the aggregate outward along the smooth slope, the cleaning component cleans the contact surface under the action of the collecting component 13. As the collecting component 13 resets, the constraint component 15 also removes the restriction on the remaining material on the screen component 12, and the material rolls along the inclined direction of the screen component 12 to complete the next screening.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic feeding system for emulsified granular ammonium nitrate explosive raw materials, comprising a feeding box, a feeding hopper connected to the top of the feeding box, and a receiving device disposed on the feeding hopper, characterized in that, Also includes: A screening mechanism is provided on a feeding box and includes a swing assembly provided on the side of the feeding box, a screen assembly provided on the swing assembly, two sets of collection assemblies provided on the feeding box, a cleaning assembly provided on the collection assembly, and a constraint assembly provided on the swing assembly. The raw materials are moved from the hopper to the feeding box. The screen assembly and the swing assembly together screen and convey the qualified raw materials downward. During the swing, the larger polymer raw materials stay in multiple recessed positions on the surface of the screen assembly and separate from the main raw materials. At this time, the constraint assembly controls the position of the main raw materials and discharges and collects the polymers through the collection assembly. Before resetting, the collection assembly drives the cleaning assembly to complete the self-cleaning.

2. The automatic feeding system for emulsified granular ammonium nitrate explosive raw materials according to claim 1, characterized in that, The swing assembly includes a screening area inside the feeding box, two sets of first motors connected to the feeding box and located on both sides of the screening area, a mounting frame connected to the output end of the first motors and located in the screening area, and a mounting slot opened on the mounting frame.

3. The automatic feeding system for emulsified granular ammonium nitrate explosive raw materials according to claim 2, characterized in that, The screen assembly includes multiple sets of sliders connected in the mounting groove, two sets of magnetic suction parts respectively disposed at both ends of the mounting groove, multiple sets of first telescopic members connected between the sliders and the magnetic suction parts, support rods connected between the corresponding sliders and the magnetic suction parts, folded mesh connected between adjacent support rods, and multiple sets of sealing plates corresponding to the support rods and located in the mounting groove.

4. The automatic feeding system for emulsified granular ammonium nitrate explosive raw materials according to claim 3, characterized in that, The constraint assembly includes a mounting ring that runs through one side of the feeding box and is sleeved on the corresponding first motor output end, a constraint plate connected to the mounting ring, multiple sets of rubber strips set on both sides of the constraint plate, a mounting plate connected to the first motor output end, and a second motor connected to the mounting plate and driving the mounting ring to rotate through gear meshing.

5. The automatic feeding system for emulsified granular ammonium nitrate explosive raw materials according to claim 4, characterized in that, The collection assembly includes two sets of first electromagnetic terminals symmetrically arranged on the feeding box for magnetic connection with the magnetic suction part, a valve plate passing through the feeding box, a U-shaped frame passing through the valve plate and connected to one side of the valve plate via a second telescopic member, second electromagnetic terminals arranged at both ends of the U-shaped frame for magnetic connection with the magnetic suction part, a collection rack connected to the feeding box, a first drive cylinder connected to the collection rack and whose output end is connected to the valve plate, and a slot formed on the collection rack.

6. The automatic feeding system for emulsified granular ammonium nitrate explosive raw materials according to claim 5, characterized in that, The cleaning assembly includes a follower frame connected to the collection rack via a third telescopic member, a first drive shaft connected to the follower frame and having a cleaning roller connected to its end, and a second drive shaft connected to the follower frame and perpendicular to the first drive shaft. The cleaning roller rotates under the drive of a valve plate, a gear rack, and a bevel gear.

7. The automatic feeding system for emulsified granular ammonium nitrate explosive raw materials according to claim 1, characterized in that, Also includes: A feeding mechanism, wherein the feeding mechanism is disposed on a feeding hopper and includes a material control component disposed on the feeding hopper, a gripping component disposed on the material control component, and a material unloading component disposed on the gripping component; After the raw material is placed in the receiving device, the gripping component separates the surface layer of the stacked raw material by clamping it, and the material control component drives the gripping component to move towards the upward material box. Then, the unloading component releases the limit of the gripping component, and the raw material falls to the screening mechanism.

8. The automatic feeding system for emulsified granular ammonium nitrate explosive raw materials according to claim 7, characterized in that, The material control assembly includes a second drive cylinder connected to the feeding hopper, a support plate connected to the feeding hopper and connected to the output end of the second drive cylinder, a third drive cylinder connected to the support plate, and a mounting platform connected to the output end of the third drive cylinder and located above the receiving device.

9. The automatic feeding system for emulsified granular ammonium nitrate explosive raw materials according to claim 8, characterized in that, The gripping assembly includes a fourth drive cylinder connected to the mounting platform, a ventilation frame connected to the output end of the fourth drive cylinder, an air pump connected to the support plate and whose output end is connected to the ventilation frame, and multiple sets of expansion members connected to the ventilation frame and penetrating the mounting platform. The expansion member includes a branch pipe connected to the ventilation frame and having a conical seat at its end, a through hole opened on the branch pipe, and an expansion membrane disposed on the branch pipe and covering the through hole.

10. The automatic feeding system for emulsified granular ammonium nitrate explosive raw materials according to claim 9, characterized in that, The unloading assembly includes multiple crescent-shaped holes on the venting frame and an exhaust pipe with corresponding crescent-shaped holes on the venting frame, which is rotated and controlled to open and close via gear and rack meshing.

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