Air-closed type dried fruit dust discharging equipment

Abstract

The invention discloses closed-air type dried fruit dust discharging equipment which comprises a cyclone dust collector provided with an air inlet, an air outlet and an ash discharging opening, and a closed-air type ash discharging device is installed at the ash discharging opening and is a closed-air type dust discharging machine or a closed-air type dust discharging machine. The closed air type dust discharging machine comprises a shell with an upper opening and a lower opening, the upper opening of the shell can be in butt joint with a dust discharging opening of the cyclone dust collector, the lower opening of the shell serves as a dust discharging opening, a rotating shaft coinciding with a middle shaft of the shell is arranged in the shell, and one end of the rotating shaft extends out of the shell to be connected with a driving motor. A plurality of fan blade plates extending in the axial direction of the rotating shaft are evenly distributed on the rotating shaft, every two adjacent fan blade plates, the rotating shaft and the inner wall of the shell can form a unit dust receiving hopper, dust at a dust discharging opening of the cyclone dust collector can be received through the unit dust receiving hoppers, the dust is discharged under the action of gravity in the rotating process, and therefore spraying type dust discharging can be avoided, and the dust discharging efficiency is improved. The defects in the prior art are overcome.

Description

Technical Field

[0001] The invention belongs to the technical field of dried fruit dust removal, and in particular relates to closed-air dried fruit dust unloading equipment. Background Art

[0002] At present, in the process of dried fruit processing or packaging, in order to ensure the appearance and hygiene of dried fruits, it is necessary to remove dust from dried fruits. In the prior art, cyclone dust collectors are usually used to collect and discharge dust from dried fruits (raisins, dried apricots, etc.) to achieve environmental purification and reduce air pollution. Cyclone dust collectors use centrifugal action to separate dust from air and discharge dust from the ash discharge port. In actual use, due to the action of high-speed centrifugal cyclones, dust is discharged from the ash discharge port in a downwardly blown manner, which will cause dust to fly, thereby causing secondary environmental pollution. The existing dust removal technical means for dried fruits (raisins, dried apricots, etc.) are described as follows: The processing of dried fruits such as raisins includes rough processing and fine processing. Rough processing mainly involves removing stems, impurities and preliminary dust removal (air washing) of dried fruits such as raisins. Fine processing mainly involves deep cleaning / fine washing (water washing, taking into account the removal of stems, impurities and dust). Dust removal / air washing of dried fruits such as raisins is one of the important links in the rough processing of dried fruits such as raisins. Therefore, cyclone dust collector is an indispensable air and dried fruit dust / dust separation equipment for dust removal of dried fruits such as raisins. The rough processing process of dust removal of dried fruits such as raisins is as follows: Based on the differences in specific gravity / density, particle size, etc. between the dried fruit body and the dust, the existing negative pressure suction equipment (including centrifugal fans, etc.) is used to move or The dried fruits and dust falling due to gravity are separated. During the movement or falling process, the dried fruits will not be driven upward by the negative pressure force generated by the centrifugal fan, but will continue to move or fall by vibration and throwing due to gravity. The dust is effectively driven upward by the negative pressure force generated by the centrifugal fan, and finally sucked into the cyclone dust collector through the centrifugal fan body. That is, the air flow generated by the centrifugal fan drives the dust into the cyclone dust collector. After the dust and air are pressed into the cyclone dust collector by the centrifugal fan, the cyclone dust collector performs spiral / vortex diversion on the air and centrifugal and gravity sedimentation on the dust at the same time. The air and dust are separated from each other, and the air is finally discharged from the exhaust port provided at the upper end of the cyclone dust collector. The dust is discharged upward through the air vents, and the dust is finally discharged from the ash discharge port provided at the bottom of the cyclone dust collector by the action of gravity; however, in the rough processing stage of dried fruits, the ash discharge port at the lower end of the cyclone dust collector needs to be opened and closed regularly to discharge the dust accumulated at the lower end of the cyclone dust collector from its ash discharge port regularly by gravity, which will cause a large amount of air leakage from the ash discharge port at the lower end of the cyclone dust collector accordingly, which not only reduces the dust removal rate of the cyclone dust collector, but also some of the dust is carried by the air flow spiraling upward in the cyclone dust collector and discharged from the exhaust port provided at the upper end of the dust collector. In addition, when the ash discharge port is opened, since the ash discharge port will definitely leak air, when the dust falls down and is discharged by gravity when the ash discharge port is opened, The air in the device will leak out from the ash discharge port at the lower end, and then blow away the dust that is falling and discharged, causing the blown dust to fail to settle as quickly as possible and spread in the air. Therefore, after the dust is discharged from the exhaust port at the upper end of the dust collector and the ash discharge port at the lower end, it will not settle vertically to the ground as quickly as possible and temporarily form dust, resulting in more serious dust pollution of indoor or outdoor air. It can be seen that in the initial dust removal process of dried fruits such as raisins, since the ash discharge port at the lower end of the cyclone dust collector is not continuously and fully sealed, dust will diffuse in the outdoor air or indoor air, which not only seriously pollutes the air, but also endangers the respiratory health of on-site dried fruit processing workers.

[0003] Therefore, designing a dry fruit dust unloading device that can avoid dust flying during the dust unloading process is a technical problem that needs to be solved urgently in this application. Summary of the invention

[0004] The present invention provides a closed-air dried fruit dust unloading device, which utilizes a plurality of unit ash receiving hoppers composed of a fan blade plate, a rotating shaft and an inner wall of a shell in a closed-air ash discharger to receive the dust at the lower ash outlet of a cyclone dust collector and discharge the dust under the action of gravity during the rotation process, thereby avoiding dust jetting unloading and solving the shortcomings of the prior art.

[0005] The present application provides a closed-air dry fruit dust discharge device, comprising: a closed-air dry fruit dust discharge device, including a cyclone dust collector, the cyclone dust collector is provided with an air inlet, an exhaust port and an ash outlet, a closed-air ash discharger is installed at the ash outlet, the closed-air ash discharger is a closed-air fan or a closed-air dust discharger; the closed-air dust discharger comprises a shell with upper and lower openings, the upper opening of the shell is connected to the ash outlet of the cyclone dust collector, the lower opening of the shell is used as the ash outlet, and the shell is provided with a A rotating shaft with overlapping axes, one end of which extends to the outside of the shell and is connected to a driving motor, and at the same time, a plurality of fan blades extending along its axial direction are evenly distributed on the rotating shaft, and an elastic protective lining layer that fully covers the inner surface of the shell is fixedly provided on the inner surface of the shell, and a fitting gap of 0.1-2mm is left between the fan blades (including both sides of the fan blades and one end away from the central axis of the shell) and the elastic protective lining layer that fixedly covers the inner wall of the shell, and two adjacent fan blades, the rotating shaft and the elastic protective lining layer constitute a unit ash hopper.

[0006] As a preferred embodiment of the present application, the lower end of the ash discharge port is connected to an ash storage bin, and an ash discharge valve is installed at the ash discharge port of the ash removal bin. The ash discharge valve comprises a hose sleeved on the ash discharge port and a pair of rollers suspended on both sides of the hose through a suspension rod, and support shafts are provided at both ends of the pair of rollers. One end of the suspension rod is hinged on the bin body of the ash storage bin, and the other end is rotatably sleeved on the support shaft. Magnetic elements are provided on the pair of rollers, and the attraction or separation of the two magnetic elements on the pair of rollers can drive the two groups of rollers to contact or separate, thereby controlling the on and off of the hose through the two groups of rollers.

[0007] As a preferred solution of the present application, the magnetic elements are arranged at two ends of the rollers and can rotate synchronously with the rollers. In the suspended state, the suction surfaces of the magnetic elements on the rollers on both sides of the hose face each other.

[0008] As a preferred solution of the present application, an elastic reset member and a limit block are provided on the supporting shaft, and the elastic reset member is arranged between the limit block and the suspension rod. When in a suspended state, the elastic reset member can drive the suction surfaces of the magnetic suction members on the rollers on both sides of the hose to reset to a facing state. At the same time, the deformation force of the elastic reset member is smaller than the adsorption force of the magnetic suction member and greater than the gravity of the rollers.

[0009] As a preferred embodiment of the present application, the magnetic attraction member includes an electromagnet, or the magnetic attraction member includes a permanent magnet and an electromagnet. When the magnetic attraction member includes a permanent magnet and an electromagnet, at least one of the two magnetic attraction members facing each other on the pair of rollers is an electromagnet.

[0010] As a preferred solution of the present application, the ash storage bin is a columnar structure with a diamond-shaped cross-section.

[0011] As a preferred solution of the present application, the elastic protective lining layer is made of silicone material, rubber material, chemical fiber material or polytetrafluoroethylene material.

[0012] As a preferred solution of the present application, the drive motor is a three-phase asynchronous motor.

[0013] As a preferred solution of the present application, the fan blade is a rectangular structure.

[0014] As a preferred solution of the present application, the closed-air ash discharger is an existing related fan.

[0015] The beneficial effect of the closed-air dried fruit dust unloading equipment in the present application is that the multiple unit ash receiving hoppers formed by the fan blades, the rotating shaft and the inner wall of the shell in the closed-air ash discharger can receive the dust at the lower ash outlet of the cyclone dust collector, and discharge the dust from the lower opening of the shell under the action of gravity during the rotation process, thereby avoiding the jet-type discharge of dust and further avoiding the secondary pollution of the factory building by dust. In addition, the inner wall of the shell is covered with an elastic protective lining layer, the two sides of the fan blades and the end away from the central axis of the shell are separated from the elastic protective lining layer without contact, and a fitting gap of 0.1-2mm is left between the two. Under the condition that the minimum fitting gap is reduced to below 0.15mm, when the unit ash receiving hopper located between the upper opening and the lower opening of the shell drives it to be filled with a sufficient amount of dried fruit ash. During rotation, regardless of whether the fan blade / unit ash hopper stops rotating or not, the design of the minimum fitting gap and the elastic protective lining layer can effectively block the passage of the vortex airflow / centrifugal cyclone in the cyclone dust collector, and prevent dust from leaking out of the fitting gap, thereby avoiding the influence of the vortex airflow / centrifugal cyclone on dust unloading; it can be seen that the use of the closed-air dried fruit dust unloading equipment of the present application can avoid the occurrence of dust flying during the dust unloading process, thereby avoiding the secondary pollution of the factory or outdoor environment by dust, improving the cleanliness of the factory environment and the outdoor environment, and greatly reducing the degree of pollution caused by dust to the air, making the raisin dust removal treatment more environmentally friendly, and then achieving the purpose of environmentally friendly unloading of dried fruit dust under the condition of safely closing the exhaust port of the cyclone dust collector, thereby solving the shortcomings of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the front structural view of the closed-air dried fruit dust unloading equipment provided in an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the main structure of the closed-air ash discharger provided in an embodiment of the present invention.

[0018] Figure 3 The embodiment of the present invention provides Figure 2 Schematic diagram of the cross-sectional structure in the AA direction.

[0019] Figure 4 The embodiment of the present invention provides Figure 3 A local enlarged schematic diagram of point A in the middle.

[0020] Figure 5 A schematic top view of the structure of a closed-air ash discharger provided in an embodiment of the present invention.

[0021] Figure 6 The embodiment of the present invention provides Figure 1 Schematic diagram of the top view of the ash discharge valve in the middle BB direction.

[0022] Figure 7 A schematic diagram of the front structural view of an ash discharge valve provided in an embodiment of the present invention.

[0023] Figure 8 The embodiment of the present invention provides Figure 7 A local enlarged schematic diagram of point B in the middle. Reference numerals

[0024] Cyclone dust collector 1, air inlet 11, exhaust port 12, ash discharge port 13, closed air ash discharger 2, shell 21, upper opening 22, lower opening 23, drive motor 24, reducer 25, rotating shaft 26, fan blade plate 27, ash storage bin 31, ash discharge valve 32, hose 321, suspension rod 322, rollers 323, supporting shaft 324, magnetic suction piece 325, limit block 326, elastic reset piece 327, lifting ring 328, conveying pipe 4, high-pressure centrifugal fan 5, supporting frame 6. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with specific implementations and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the present invention and its application.

[0026] Embodiment 1: This embodiment provides a closed air type dry fruit dust discharge device, such as Figure 1As shown, the device includes a cyclone dust collector 1 provided with an air inlet 11, an exhaust port 12 and an ash outlet 13. The cyclone dust collector 1 is fixed by a support frame 6. A closed-air ash discharger 2 is installed at the ash outlet 13 of the cyclone dust collector 1. The closed-air ash discharger 2 is a fan-off fan or a closed-air dust discharger. The closed-air ash discharger 2 can reliably transfer (feed or discharge) powder materials while ensuring that the air flow pressure in the conveying pipeline does not leak. In the present invention, when the fan-off fan is working, it can prevent the vortex airflow in the cyclone dust collector from flowing out from the discharge port opened at the bottom end of the cyclone dust collector 1, that is, keep the discharge port opened at the bottom end of the cyclone dust collector 1 in a sealed state, which can continuously prevent air leakage from the discharge port, and deposits in the cyclone dust collector 1. The dried fruit dust falls into the feed port at the upper end of the fan from the discharge port at the bottom under the action of gravity, is discharged from the discharge port at the lower end of the fan after being transferred by the fan, and falls from the discharge port at the lower end of the fan under the action of gravity. Since the fan keeps the discharge port at the bottom of the cyclone dust collector 1 sealed by the fan, the vortex airflow in the cyclone dust collector cannot spray out through the fan and its discharge port, that is, it cannot interfere with the settling of dust falling from the discharge port of the fan, and cannot blow away the dust falling from the discharge port of the fan. The dust falling from the discharge port of the fan (the discharge port of the cyclone dust collector) is not interfered or hindered and only settles vertically downward rapidly under the action of gravity, thereby preventing the dust from being blown away by the airflow sprayed from the discharge port of the cyclone dust collector to form dust.

[0027] The air-locking ash discharger 2 may adopt an air-locking fan, which is an existing commercially available product and is also known as an air-locking device (round-mouth discharger) or an air lock valve, a rotary valve, etc. It is a powder feeding or discharging mechanical component manufactured and commercially available based on related existing technical means. It was originally used in the positive pressure airflow (pressure delivery) or negative pressure airflow (suction delivery) conveying process of powder materials in the technical fields of chemical industry, building materials, non-ferrous metals and metallurgical production, grain and food processing.

[0028] In addition, the closed-air dust discharger 2 can also use a closed-air dust discharger, which is not an existing commercially available product, but a new type of dust discharger designed specifically for the environmentally friendly discharge of dust from dried fruits (raisins, dried apricots, dried wolfberries, etc.), such as Figure 2-5As shown, the closed-air dust discharger includes a shell 21 with upper and lower openings. In this embodiment, the shell 21 is a columnar structure. The upper opening 22 of the shell 21 can be connected to the lower ash port 13 of the cyclone dust collector 1. The lower opening 23 of the shell 21 serves as an ash discharge port. A rotating shaft 26 coinciding with the central axis of the shell 21 is provided in the shell 21. One end of the rotating shaft 26 extends to the outside of the shell 21 and is connected to a driving motor 24. In this embodiment, the driving motor 24 is a three-phase asynchronous motor; the rotating shaft 26 is evenly distributed along its axial direction. The extended rectangular blade plate 27, the blade plate 27 and the rotating shaft 26 form an impeller, and the impeller rotates under the drive of the three-phase asynchronous motor. In this embodiment, the connection line between the blade plate 27 and the rotating shaft 26 is parallel to or intersects with the central axis of the rotating shaft 26, preferably parallel, and two adjacent blade plates 27 and the rotating shaft 26 and the inner wall of the shell 21 can form a unit ash hopper. The blade plate 27 (including both sides of the blade plate 27 and one end away from the central axis of the shell 21) and the inner wall of the shell 21 have a matching gap of 0.1-2mm, such as Figure 4 As shown, the fitting gap of this size will not affect the normal rotation of the fan blade 27. When the unit ash hopper drives the dried fruit ash contained / received therein to rotate around the rotating shaft 26, the ash that fills the corresponding fitting gap can also prevent the centrifugal cyclone from passing through the fitting gap, thereby avoiding the influence of the centrifugal cyclone on the dust discharge. In this embodiment, the unit ash hopper can be used to receive the dust in the shell 21, and then unload it from the lower opening 23 of the shell 21 through rotation. Due to the limitation of the size of the fitting gap, the dust is slightly affected by the centrifugal cyclone during the dust discharge process, and only falls under the action of gravity, thus avoiding the occurrence of jet-type discharge.

[0029] The use principle of this embodiment includes: before use, the high-pressure centrifugal fan 5 is connected to the air inlet 11 end of the cyclone dust collector 1 through the conveying pipe 4. When the high-pressure centrifugal fan 5 is used in specific applications, it generally uses an exhaust fan with a three-phase motor. The exhaust fan is produced and sold on the market by Foshan Nanhai Jiuzhou Puhui Fan Co., Ltd. and its model is 9-19-5A. The motor it is equipped with is a three-phase asynchronous motor with an output power of 7.5kW. The inlet end of the high-pressure centrifugal fan 5 can be directly opposite to the dust outlet of the dried fruit dust removal equipment. The dust is collected into the cyclone dust collector 1 through the high-pressure centrifugal fan 5, and then the dust is separated by the centrifugal action of the cyclone dust collector 1. The dust falls under the action of gravity and enters the unit ash hopper through the ash outlet 13. The drive motor 24 drives the unit ash hopper Rotation. During the rotation process, the dust in the unit ash hopper that rotates to the lower opening 23 of the shell 21 is discharged under the action of gravity. At the same time, the unit ash hopper located at the upper opening 22 of the shell 21 continues to receive the dust from the lower ash port 13, and circulates in sequence. In this embodiment, since the two sides of the fan blade 27 and the end away from the central axis of the shell 21 are separated from the inner wall of the shell 21 without contacting each other and a fitting gap of 0.1-2mm is left between the two, the fitting gap of this size can ensure the normal rotation of the fan blades and the unit ash hopper filled with dried fruit ash, and can also block the passage of centrifugal cyclone and dried fruit ash. Therefore, when the dust falls from the unit ash hopper, the influence of the centrifugal cyclone can be ignored, thereby ensuring the straight line fall of the dust and avoiding the occurrence of jet-like fall.

[0030] It can be seen that the use of the closed-air dried fruit dust unloading equipment in this embodiment can avoid the occurrence of dust flying during the dust unloading process, thereby avoiding secondary pollution of the factory building by dust, improving the cleanliness of the factory environment and greatly reducing the degree of air pollution caused by dust, making the raisin dust removal process more environmentally friendly and solving the shortcomings of the existing technology.

[0031] In this embodiment, in order to save manufacturing costs, it is preferred to select an existing fan as the closed-air ash discharger 2. The specific model, size and other parameters of the closed-air fan are determined according to the specific size of the ash outlet 13 of the cyclone dust collector 1, and this embodiment does not make any detailed restrictions.

[0032] Embodiment 2: This embodiment provides a closed air type dry fruit dust discharge device. Compared with Embodiment 1, this embodiment has an ash storage bin 31 connected to the lower end of the ash discharge port, and an ash discharge valve 32 is installed at the ash discharge port of the ash storage bin 31. Figure 1 As shown, the ash storage bin 31 and the ash discharge valve 32 can be used to control the dust discharge duration or cycle, etc., without the need to frequently start and stop the drive motor 24 on the closed-air ash discharger 2.

[0033] In this embodiment, the ash discharge valve 32 includes a hose 321 sleeved on the ash discharge port and rollers 323 suspended on both sides of the hose 321 through a suspension rod 322. The rollers 323 need to be installed horizontally in specific applications, that is, the length direction of the rollers 323 is always parallel to the horizontal plane, in order to maximize the magnetic attraction between the permanent magnet and the electromagnet at both ends of the rollers 323. Figure 6 As shown, in this embodiment, the hose 321 is made of silicone material (silicone hose) or polyurethane material (fire water hose) or rubber material (rubber hose) or canvas material (canvas water hose). The two sets of rollers 323 on both sides of the hose 321 are made of aluminum or engineering plastics or rubber tubes in specific applications. In specific applications, solid rubber tubes with moderate elasticity are preferred. The surfaces of all rollers 323 should be kept smooth without burrs or protrusions to ensure that they will not damage the hose 321 after contacting the rollers 323. Support shafts 324 are provided at both ends of the rollers 323, and one end of the suspension rod 322 is hinged to the ash storage bin 3 1, and the other end is rotatably mounted on the support shaft 324 through a hanging ring 328 (a bearing may be arranged in the hanging ring 328), so as to ensure that the rollers 323 can swing with the hanging rod 322 as a radius, and can also rotate relative to the hanging rod 322, thereby increasing the flexibility of the rollers 323; the rollers 323 are provided with magnetic suction members 325, which are respectively arranged horizontally at the relative and facing positions of the two groups of rollers 323, preferably, the magnetic suction members 325 are arranged at the two ends of the rollers 323, and can rotate synchronously with the rollers 323. When in the suspended state, the suction surfaces of the magnetic suction members 325 on the rollers 323 on both sides of the hose 321 are In this embodiment, the magnetic attraction member 325 includes an electromagnet that generates magnetism when powered on and loses magnetism when powered off, or the magnetic attraction member 325 includes an electromagnet and a permanent magnet (a NdFeB alloy permanent magnet); when the magnetic attraction member 325 includes a permanent magnet and an electromagnet, at least one of the two magnetic attraction members 325 facing each other on the two sets of rollers 323 is an electromagnet; the attraction or separation of the two magnetic attraction members 325 facing each other on the rollers 323 can drive the two sets of rollers 323 to contact or separate, and then the on and off of the hose 321 can be controlled by the two sets of rollers 323; the electromagnet includes a magnetic core and a conductive coil wound on the magnetic core along a spiral line, and the magnetic core is made of a single metal, such as iron, aluminum, etc. Or copper, or a magnetic composite metal (magnetic alloy), preferably aluminum, because generally speaking, aluminum is not magnetic, so it is not easy to be magnetized, and has a high magnetic permeability (small magnetic resistance). When the two magnetic suction members 325 (the conductive coils of the electromagnet) are energized, the conductive coils generate a greater electromagnetic force, which increases the magnetic attraction force on the permanent magnet and increases the magnetic attraction distance on the permanent magnet, which is conducive to the electromagnet and the permanent magnet being effectively attracted together by the increased magnetic attraction force. Therefore, it is helpful for the two sets of rollers 323 to reliably, steadily and continuously clamp the hose 321 through the increased magnetic attraction force, so that the hose 321 remains in a cut-off state.

[0034] In this embodiment, since the roller 323 can rotate relative to the ring 328 of the suspension rod 322, when the two magnetic components 325 are electrically attracted, the rotation angle of the roller 323 can be adaptively adjusted under the action of the attraction force to ensure that the magnetic surface of the magnetic component 325 is completely attracted, thereby ensuring that the attraction force is sufficiently stable.

[0035] In this embodiment, in order to prevent the rollers 323 from over-extruding the hose 321, it is preferred that the opposing ends of the two groups of magnetic elements 325 on the two groups of rollers 323 extend a certain distance to the ends of the rollers 323. In this way, when the two opposing magnetic elements 325 are attracted, there is a gap between the two groups of rollers 323 to accommodate the wall thickness of the hose 321. The distance can be determined based on the thickness of the hose 321, so that the hose 321 can be clamped by the rollers 323 so that the two sides of the hose 321 are in contact without over-extruding the hose 321.

[0036] In this embodiment, the magnetic component 325 can be directly fixed to the end of the roller 323 by gluing or the like, or a through hole can be made on the magnetic component 325 (care should be taken not to damage the conductive coil of the electromagnet), and the magnetic component 325 can be sleeved on the support shaft 324 through the through hole and then fixed to the roller 323. The specific shape can be determined according to the size and shape of the magnetic component 325.

[0037] In the specific implementation of this embodiment, a mechanical weighing platform / platform scale or an electronic weighing platform / platform scale is placed directly below the hose 321, and an industrial (cement and other powder) packaging bag that can be repeatedly or recycled for containing dried fruit ash is placed on the weighing platform / platform scale. The packaging bag is also correspondingly located directly below the hose 321 / ash storage bin 31, and the bag opening at the upper end of the packaging bag is sleeved on the pipe opening at the lower end of the hose 321 (that is, the pipe opening at the lower end of the hose 321 extends into the bag opening at the upper end of the packaging bag, and a tying device such as a tightening rope or a tightening belt is used to temporarily and appropriately bind the bag opening at the upper end of the packaging bag to the surrounding hose 321 in a manner of surrounding the pipe opening at the lower end of the hose 321. On the outer peripheral wall of the lower end of the pipe opening 321, the bag opening equivalent to the upper end of the packaging bag temporarily covers and covers the lower end of the hose 321. When the hose 321 is connected, the dust and dirt falling from the lower end of the hose 321 through the ash storage bin 31 and the hose 321 completely falls into the packaging bag without being exposed outside the hose 321 and the packaging bag, thereby preventing the dust and dirt falling from the lower end of the hose 321 from falling onto the ground. In general, the ground is kept free of obvious dust accumulation to the greatest extent, which can save most of the manual labor of cleaning the dust that falls on the ground, and greatly reduce the labor intensity of manual dust removal;When the weight (KG) reading displayed on the weighing table / scale pointer or LCD screen roughly corresponds to the ash and soil in the bag reaching 70%-80% of the maximum ash and soil weight / total weight of the bag, the bag containing about 70%-80% of the total weight of ash and soil is considered to be full of ash and soil, and the part of the bag located at the upper end of the bag that can originally hold the remaining 20%-30% of the total weight of ash and soil remains hollow to facilitate manual tightening or tightening of the bag with a tightening rope or tightening belt The upper bag opening of the packaging bag is ensured to be securely sealed by temporarily stopping the hose 321 to close the ash discharge port of the ash storage bin 31, and then the tightening rope or tightening belt that previously tightened and fixed the upper bag opening of the packaging bag on the lower end of the hose 321 is untied, and then the untied tightening rope or tightening belt is used to wrap around the upper bag opening of the packaging bag to tighten or tighten the upper bag opening of the packaging bag to fix and seal the bag opening, and then the upper bag opening of the packaging bag filled with dried fruit ash is closed. During the manual handling or transportation of the packaging bag, the dust and dirt therein are prevented from leaking out of the bag opening. The packaging bag with the sealed bag opening and filled with dust and dirt is manually transported to a designated place or transported to a designated transportation vehicle for transporting dust and dirt. Then, the empty packaging bag is promptly placed on a weighing platform / scale. The bag opening at the upper end of the packaging bag is temporarily and appropriately bound to the outer peripheral wall around the lower end of the hose 321 by a tying device such as a tightening rope or a tightening belt. Then, the hose 321 is turned on to open the dust discharge port of the ash storage bin 31. During the period from the previous opening of the dust discharge port of the ash storage bin 31 to its subsequent closing, the dry fruit dust and dirt temporarily accumulated in the ash storage bin 31 continues to completely fall into the packaging bag from the lower end of the hose 321 through the ash storage bin 31 and the hose 321. By analogy and repeating this cycle, the dry fruit dust and dirt can be sealed, collected and environmentally transported by timely replacing the packaging bag filled with dry fruit dust and dirt with the empty packaging bag. ;

[0038] The working principle of this embodiment includes: when it is necessary to replace the packaging bag (a reusable industrial powder packaging bag for holding dried fruit ash (dust)) located directly below the ash discharge valve 32 (a necessary technical operation that temporarily keeps the hose 321 closed) and other reasons, when it is necessary to stop the dust discharge through the hose 321, a direct current (generally a safe direct current with a voltage of less than 36V (a safe current of less than 10 mA to ensure personal safety) can be positively loaded on the two magnetic suction members 325 (the conductive coils of the electromagnet) to generate an electromagnetic suction force that simultaneously attracts the permanent magnet and the electromagnet to each other, and the electromagnetic suction force drives the rollers 323 on both sides of the hose 321 to contact each other and The hose 321 is clamped and enters the cut-off state. The two semicircular walls of the hose 321 are deformed after being clamped or squeezed by the rollers 323 and are in seamless contact or fit together, and then the ash discharge port of the ash storage bin 31 is closed. At this time, the air-tight ash discharger 2 can still work normally and temporarily store the fallen dust in the ash storage bin 31. When the industrial powder packaging bag is replaced, the two magnetic suction parts 325 (conductive coils of the electromagnet) facing each other can be de-energized. At this time, the electromagnetic suction force disappears, and the two sets of rollers 323 are separated from each other by the added gravity of the rollers 323 and other components such as permanent magnets, electromagnets, and suspension rods 322. At the same time, the hose 321 is separated from the circumferential walls that are relatively in contact with each other. After that, it returns to a semicircular shape and then returns to the conductive state. The suspension rods 322 separate from each other and swing down, and the rollers 323 move downward along the arc accordingly. During the swinging of the suspension rod 322, the rollers 323 always remain in a horizontal state, and the suspension rod 322 is finally constrained by gravity to stop swinging and then remain in a suspended vertical state. The rollers 323, permanent magnets, ferromagnets, etc. are also stationary accordingly. Alternatively, direct current can be reversely loaded on the two magnetic suction members 325 (conductive coils of electromagnets) to generate an electromagnetic repulsive force that simultaneously causes the permanent magnets and the electromagnets to repel each other and separate. The two sets of rollers 323 are separated by the electromagnetic repulsive force and the total effect of the added gravity of the rollers 323 and other components such as permanent magnets, electromagnets, and suspension rods 322. The hose 321 is quickly separated from each other. At the same time, the hose 321 returns to a semicircular shape after separation from the surrounding walls in contact with each other, and then resumes the conductive state again. The hose 321 is completely restored to conductivity, and the suspension rods 322 separate from each other and swing down. The rollers 323 move downward along the arc accordingly. During the swinging of the suspension rod 322, the rollers 323 always remain in a horizontal state. After the hose 321 is completely restored to conductivity or the suspension rod 322 swings down to a clearly vertical position, the two magnetic suction members 325 (conductive coils of the electromagnet) facing each other are de-energized. At this time, the electromagnetic repulsive force disappears, and the suspension rod 322 is finally constrained by gravity to stop swinging and then maintain a suspended vertical state. The rollers 323, permanent magnets, ferromagnets, etc. are also correspondingly stationary.

[0039] It can be seen that the present embodiment can control the time or period of dust falling according to needs through the ash storage bin 31 and the ash discharge valve 32. In order to keep the cyclone dust collector 1 continuously sucking the dry fruit ash and soil through the high-pressure centrifugal fan 5 that is turned on, the high-pressure centrifugal fan 5 generally cannot be stopped for a short time after being powered on and started every day, and can only work continuously. However, the driving motor 24 on the closed-air ash discharger 2 cannot be frequently started and stopped to open or close the ash discharge port 13 of the cyclone dust collector 1. The driving motor is generally selected as a cycloidal pinwheel reduction motor driven by a three-phase power supply (composed of a cycloidal pinwheel reducer and a three-phase asynchronous / synchronous The three-phase asynchronous / synchronous motor drives the closed-air ash discharger 2 (the air-closing fan is operated by the air-closing fan or the closed-air dust discharger) through a cycloidal pinwheel reducer. The cycloidal pinwheel reducer motor is produced and sold on the market by Jiangsu Dahong Electromechanical Co., Ltd. It has a large output power and can better meet the requirements of driving the closed-air ash discharger 2. In addition, if the three-phase asynchronous motor in the high-pressure centrifugal fan 5 and the three-phase asynchronous / synchronous motor in the drive motor 24 are frequently started and stopped, their normal working life will be significantly shortened, and even cause them to heat up and burn out. Only the three-phase asynchronous motor in the high-pressure centrifugal fan 5 and the three-phase asynchronous / synchronous motor in the drive motor 24 can be kept / The synchronous motor works continuously, so it is necessary to adopt the ash discharge valve 3 designed by the present invention to make the hose 321 in the ash discharge valve 32 frequently turned on / opened or cut off (closed), which can protect the three-phase asynchronous / synchronous motor in the drive motor 24 from being frequently started and stopped and shortening the working life or being damaged; in addition, the hose 321 and the roller 323 are used as the ash discharge valve 32. Compared with the use of a baffle and other structures, its advantages are: on the one hand, it is convenient to connect with the dust transportation equipment, and on the other hand, it can avoid the phenomenon of dry fruit dust flying and scattering when the dust falls quickly at the moment of conduction. Because the hose 321 is long enough and it is clamped by the roller 323 The compressed part is located in the middle of it, and the lower end of the hose remains in a vertical state because its surrounding wall is basically not deformed. Therefore, the lower end of the hose is just facing downward, which can restrain the vertical falling of dried fruit ash. Therefore, without using additional reusable industrial powder packaging bags to rotate the dried fruit ash falling from the lower end of the hose 321, at least the ash discharge valve 32 of the structure of this embodiment can also be used alone to realize the discharge of dried fruit dust in a vertical falling state, so that the dried fruit ash discharged to the ground is more obviously concentrated and piled together, which can prevent the dried fruit ash from scattering and falling to the ground during the falling process to the greatest extent.

[0040] In this embodiment, the ash storage bin 31 is a columnar structure with a diamond-shaped cross-section. The advantages of the ash storage bin 31 of this structure are: first, it has a large storage space and occupies a small space; second, the amount of dust accumulated is small, and the stored dust can be basically completely discharged and will not accumulate in the bin body, which meets the needs of this embodiment.

[0041] In the present embodiment, the elastic protective lining layer is made of silicone material, rubber material, chemical fiber material or polytetrafluoroethylene material. Since the elastic protective lining layer made of silicone, rubber, chemical fiber, polytetrafluoroethylene and other materials has sufficient elasticity, when the fan blade 27 / unit ash hopper drives the ash and soil contained therein to rotate and the ash and soil are compacted by the fan blade 27 and the elastic protective lining layer and fill the fitting gap, the fan blade 27 will slide or roll with the dry fruit ash and soil in the fitting gap during the rotation process and squeeze the dry fruit ash and soil in the fitting gap with the elastic protective lining layer. In addition, the dry fruit ash and soil will also slide or roll with the elastic protective lining layer. Since the elastic protective lining layer has sufficient elasticity, when the ash and soil squeeze the elastic protective lining layer, the part of the surface of the elastic protective lining layer squeezed by the ash and soil will be concave, leaving the space squeezed by the ash and soil to the ash and soil in the fitting gap under the action of gravity, thereby preventing the ash and soil from being stuck in the fitting gap, and then correspondingly avoiding the fan blade 27 from being stuck by the ash and soil and being unable to rotate. When the ash and soil are not When the fitting gap is fully filled, the part of the original elastic protective lining layer that was squeezed and depressed by the ash and soil will rebound. In addition, the elastic protective lining layer can separate the inner wall of the shell from the ash and soil that moves in the unit ash hopper, preventing the inner wall of the shell from being gradually worn away by the friction of the ash and soil, thereby playing the role of protecting the shell. The closed-air dust discharger is regularly dismantled to observe the wear of the elastic protective lining layer attached to the inner wall of the shell. When the elastic protective lining layer is finally obviously worn away by the moving ash and soil, the elastic protective lining layer can be replaced on the inner wall of the shell in time; when the unit ash hopper located between the upper opening 22 and the lower opening 23 of the shell 21 drives the sufficient amount of dry fruit ash and soil inside to rotate, the unit ash hopper will revolve around the rotating shaft 26 accordingly, and the ash and soil will be able to fill and fully seal the fitting gap accordingly, thereby completely ensuring that the vortex airflow / centrifugal cyclone in the cyclone dust collector 1 will naturally not leak out of the closed-air dust discharger through the fitting gap during the rotation of the fan plate 27 of the closed-air dust discharger.

[0042] It has been proved through repeated tests that when the minimum fit clearance between the two sides of the fan blade 27 and the end away from the central axis of the shell and the elastic protective lining is further reduced to about 0.15mm or less, when the fan blade 27 of the closed-air dust discharger stops rotating, the sufficient amount of dry fruit ash in the unit ash hopper between the upper opening 22 and the lower opening 23 of the shell 21 will be basically filled with the minimum fit clearance and fixed within the minimum fit clearance by the limiting extrusion effect of the elastic protective lining and the previously rotating fan blade 27, the elastic extrusion effect of the elastic protective lining and the gravity, thereby reducing the minimum fit clearance size to 0.15mm. m or less, an elastic protective lining layer which fully covers the inner wall of the shell is fixedly provided on the inner wall of the shell, and the elastic extrusion limit of the dust and soil in cooperation with the fan blade plate 27 and the elastic protective lining layer can effectively prevent the dust and soil in the fitting gap / unit ash hopper from falling out through the fitting gap and the lower opening 23 of the shell 21 in turn under the action of gravity, and then basically keep the closed-air dust discharger from leaking dust. Of course, the vortex airflow / centrifugal cyclone in the cyclone dust collector 1 naturally cannot flow out of the closed-air dust discharger through the fitting gap. Therefore, the elastic protective lining layer and the minimum fitting gap are the key necessary technical conditions for fixing the dust and soil in the minimum fitting gap to prevent air leakage and soil leakage.

[0043] As a preferred solution of this embodiment, in order to ensure that the magnetic surfaces of the magnetic members 325 on the two sets of rollers 323 are always facing each other in the suspended state, and to improve the response efficiency of the magnetic members 325 when they are attracted, it is preferred that an elastic reset member 327 and a limit block 326 are provided on the support shaft 324, and the elastic reset member 327 is provided between the limit block 326 and the suspension rod 322, such as Figure 7-8 As shown, in the suspended state, the elastic reset member 327 can reset the suction surface of the magnetic member 325 on the roller 323 on both sides of the driving hose 321 to a facing state, and the limit block 326 can be a nut or a gasket, and the limit block 326 rotates with the rotating shaft 26.

[0044] In this embodiment, the deformation force of the elastic reset member 327 is smaller than the adsorption force of the magnetic member 325 and larger than the gravity of the roller 323 .

[0045] In this embodiment, the elastic reset member 327 can be a torsion spring. Figure 7-8As shown, the two ends of the torsion spring are respectively fixed on the limit block 326 and the ring 328 of the suspension rod 322. In the initial position, that is, the torsion spring has no deformation, and the suction surfaces of the magnetic suction members 325 located at the ends of the two pairs of rollers 323 are facing each other, that is, the two magnetic suction members 325 are in a horizontal state. During the electrical clamping process of the magnetic suction members 325, the rollers 323 adaptively rotate to adjust the suction surfaces of the magnetic suction members 325 to face each other. In this process, the torsion spring is deformed by force. When one clamping is completed, the electromagnetic suction force of the magnetic suction member 325 disappears, and the two pairs of suspension rods 322 swing back to back to each other under the action of the gravity of the rollers 323 and separate from each other. In the process of the two pairs of suspension rods 322 swinging back to back to each other, the torsion spring will first release its previously stored elastic torque until the suspension rods 322 finally stand still in a vertical state. After the suspension rods 322 stop swinging and stand still, the torsion spring drives the magnetic suction member 325 to return to a horizontal state through the supporting shaft.

[0046] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several improvements can be made without departing from the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A closed-air dried fruit dust discharge device, comprising a cyclone dust collector (1), the cyclone dust collector (1) being provided with an air inlet (11), an air outlet (12) and an ash outlet (13), characterized in that: A closed-air ash discharger (2) is installed at the ash lowering port (13), and the closed-air ash discharger (2) is a closed-air fan or a closed-air dust discharger; the closed-air dust discharger comprises a shell (21) with upper and lower openings, the upper opening (22) of the shell (21) is connected to the ash lowering port (13) of the cyclone dust collector (1), and the lower opening (23) of the shell (21) serves as an ash discharge port; a rotating shaft (26) is provided in the shell (21) and coincides with the central axis thereof, and one end of the rotating shaft (26) extends to the shell (21). 21) is externally connected to a drive motor (24), and at the same time, a plurality of fan blades (27) extending along its axial direction are evenly distributed on the rotating shaft (26), and an elastic protective lining layer that fully covers the inner surface of the shell (21) is fixedly provided on the inner surface of the shell (21), and the fan blades (27) and the elastic protective lining layer that fixedly covers the inner wall of the shell (21) are separated from each other and do not contact each other, and a matching gap of 0.1-2 mm is left between the two, and two adjacent fan blades (27) and the rotating shaft (26) and the elastic protective lining layer constitute a unit ash hopper.

2. The closed air dried fruit dust discharge equipment according to claim 1, characterized in that: The lower end of the ash discharge port is connected to an ash storage bin (31), and an ash discharge valve (32) is installed at the ash discharge port of the ash storage bin (31). The ash discharge valve (32) comprises a hose (321) installed on the ash discharge port and a pair of rollers (323) suspended on both sides of the hose (321) through a suspension rod (322). Support shafts (324) are provided at both ends of the pair of rollers (323). One end of the suspension rod (322) is hinged to the bin body of the ash storage bin (31), and the other end is rotatably sleeved on the support shaft (324). Magnetic elements (325) are provided on the pair of rollers (323). The attraction or separation of the two magnetic elements (325) can drive the two groups of rollers (323) to contact or separate, thereby controlling the opening and closing of the hose (321) through the two groups of rollers (323).

3. The closed air dried fruit dust discharge equipment according to claim 2 is characterized in that: The magnetic attraction members (325) are arranged at two ends of the rollers (323) and can rotate synchronously with the rollers (323). In the suspended state, the attraction surfaces of the magnetic attraction members (325) on the rollers (323) on both sides of the hose (321) face each other.

4. The closed air dried fruit dust discharge equipment according to claim 3 is characterized in that: An elastic reset member (327) and a limit block (326) are provided on the support shaft (324); the elastic reset member (327) is arranged between the limit block (326) and the suspension rod (322); in a suspended state, the elastic reset member (327) can drive the suction surfaces of the magnetic members (325) on the rollers (323) on both sides of the hose (321) to reset to a facing state; at the same time, the deformation force of the elastic reset member (327) is smaller than the adsorption force of the magnetic members (325) and larger than the gravity of the rollers (323).

5. The closed air type dried fruit dust discharge equipment according to claim 2 is characterized in that: The magnetic attraction member (325) includes an electromagnet, or the magnetic attraction member (325) includes a permanent magnet and an electromagnet. When the magnetic attraction member (325) includes a permanent magnet and an electromagnet, at least one of the two magnetic attraction members (325) facing each other on the two sets of rollers (323) is an electromagnet.

6. The closed air type dried fruit dust discharge equipment according to claim 2, characterized in that: The ash storage bin (31) is a columnar structure with a diamond-shaped cross section.

7. The closed air dried fruit dust discharge equipment according to claim 1, characterized in that: The elastic protective lining layer is made of silicone material, rubber material, chemical fiber material or polytetrafluoroethylene material.

8. The closed air type dried fruit dust discharge equipment according to claim 1, characterized in that: The drive motor (24) is a three-phase asynchronous motor.

9. The closed air dried fruit dust discharge equipment according to claim 1, characterized in that: The fan blade plate (27) is a rectangular structure.

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