CN112964331A - Material level detection device, stock bin and material level detection system of stock bin - Google Patents
Material level detection device, stock bin and material level detection system of stock bin Download PDFInfo
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- CN112964331A CN112964331A CN202110416195.8A CN202110416195A CN112964331A CN 112964331 A CN112964331 A CN 112964331A CN 202110416195 A CN202110416195 A CN 202110416195A CN 112964331 A CN112964331 A CN 112964331A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/48—Arrangements of indicating or measuring devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/04—Spreading out the materials conveyed over the whole surface to be loaded; Trimming heaps of loose materials
- B65G69/0433—Spreading out the materials conveyed over the whole surface to be loaded; Trimming heaps of loose materials with screw conveyors
Abstract
The invention provides a material level detection device, a material bin and a material level detection system of the material bin, and relates to the technical field of material level detection of high-temperature materials. The material level screw comprises a motor, a screw shaft and a shell, the screw shaft is provided with a first screw shaft section, a second screw shaft section and a third screw shaft section which are fixedly connected in sequence, a screw blade is arranged on the first screw shaft section along the direction of a screw axis, a material baffle is arranged between the first screw shaft section and the second screw shaft section at intervals, the first screw shaft section and the second screw shaft section are arranged in the shell, and the power output end of the motor is connected with the third screw shaft section of the screw shaft through a. The spiral is used as a device for monitoring the material level, the high-temperature environment of 450-800 ℃ can be met, the problems of coal tar precipitation and pulverized coal interference do not need to be worried about, and the position of the material can be rapidly judged through the change of current because the material level spiral is always in a forward and reverse rotating state, so that the problems of false alarm and missing report are fundamentally solved.
Description
Technical Field
The invention relates to the technical field of material level detection of high-temperature materials, in particular to a material level detection device, a storage bin and a material level detection system of the storage bin.
Background
The coal material after pyrolysis treatment needs to be cooled and transferred through a stock bin, the temperature of the material before cooling is as high as about 750 ℃, meanwhile, the stock bin is often communicated with coal gas, dust, oil gas and the like inevitably exist in the coal gas, and the conventional material detection technologies such as heavy hammer detection, guide broadcast radar, laser, microwave, rotation resistance type detection, movement resistance type detection and the like cannot meet the material level detection of the coal pyrolysis material. The existing detection technology cannot meet the requirement of detecting the height of the material under the high-temperature condition of more than 100 ℃ and the normal detection of the height of the material when the coal tar is separated out and the material is stuck due to a coal dust environment; the method has the problems of extremely high false alarm rate and the like, and the current production process completely depends on the experience judgment of post workers and is lack of accuracy and safety.
Chinese patent application publication No. CN101354280A discloses a device for measuring the material level of a hopper of a dry quenching primary dust remover. And a thermocouple is inserted into the matching hole of the special-shaped mullite brick through the sleeve, and the temperature difference between the sleeve and the special-shaped mullite brick is detected through the thermocouple. This method has a problem in that the measurement of the internal temperature is relatively slow or delayed. The temperature measuring element is arranged on the side wall of the hopper, and the acquired temperature data cannot better reflect the real material temperature. After calculation, a large error occurs, which causes inaccuracy and even false alarm, and affects the operation process and equipment operation.
Chinese patent application publication No. CN107505022A discloses a high-temperature material position detection device and method, through set up a series of thermocouples of different length at the top of the feed bin, cooperate with the PLC control system, the position of material is judged according to the temperature difference that the thermocouple gathered, this scheme is in the in-service use, because the characteristic of thermocouple itself, there is the slow problem of response, the position of material can not be judged fast, along with the extension of live time, especially after using for a period of time under high temperature, dust and oil gas environment, the inevitable bonding in thermocouple surface has coal or dust, response speed further delays, the wrong report problem can appear even.
In view of this, the invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a material level detection device, a material bin and a material level detection system of the material bin.
The invention is realized by the following steps:
the invention provides a material level detection device which comprises a material level screw, wherein the material level screw comprises a motor, a screw shaft and a shell, the screw shaft is provided with a screw shaft first section, a screw shaft second section and a screw shaft third section which are sequentially and fixedly connected, a screw blade is arranged on the screw shaft first section along the screw shaft direction, a material baffle plate is arranged between the screw shaft first section and the screw shaft second section at intervals to prevent materials from entering the screw shaft second section from the screw shaft first section, the screw shaft first section and the screw shaft second section are arranged in the shell, and the power output end of the motor is connected with the screw. One end of the shell, which is far away from the screw shaft section, is provided with a notch so as to enable materials to fall into a cavity formed by the screw shaft section, the shell and the material baffle plate.
The material baffle is used for preventing the material from entering the screw shaft second section from the screw shaft first section. During the use, through just reversing the material level spiral, realize seeing off of material with the help of the striker plate to continuously detect the material level in the feed bin.
The material of the striker plate can be a high-temperature-resistant and corrosion-resistant material, such as 3010s stainless steel or 15CrMoR steel. The thickness of the material baffle plate can be adjusted in a self-adaptive mode according to needs, for example, 10-1000 mm.
In one embodiment, the material level spiral is electrically connected with an external frequency converter through a motor, and the frequency converter is used for adjusting the voltage and the frequency of an output power supply to realize the control and the real-time detection of the frequency of the working power supply of the motor.
The screw shaft second section and the screw shaft third section are not provided with screw blades along the screw axis direction and are through shafts.
The spiral blade can be used as long as the spiral blade can meet the requirement of material transmission, the thickness, the spiral angle and the selected material of the spiral blade can be adaptively adjusted according to production requirements, and a commercially available spiral shaft can be used for directly replacing the spiral shaft in the application.
Furthermore, the material of the screw machine shell adopts high temperature resistant and corrosion resistant material.
Preferably, the material of the screw machine shell is 3010s stainless steel or 15CrMoR steel.
In a preferred embodiment of the invention, the three sections of the screw shaft and the coupling are arranged in the connecting sleeve; the connecting sleeve comprises a first connecting sleeve and a second connecting sleeve which are fixedly connected, one end of the first connecting sleeve is fixedly connected with the shell, and one end of the second connecting sleeve is fixedly connected with the shell of the motor.
The connecting sleeve is arranged to protect the coupling and the screw shaft from being affected by high temperature and dust, and the faults of equipment are reduced. The connecting sleeve can be in the shape of a cylinder, a table body, an irregular variable-diameter table body and the like.
The shapes of the first connecting sleeve and the second connecting sleeve can be the same or different, and the first connecting sleeve and the second connecting sleeve can be adjusted in a self-adaptive mode according to needs.
In one embodiment, the shell is cylindrical, and when the shell is installed, the shell penetrates through the wall of the storage bin and is fixedly connected with the wall of the storage bin, and the end, close to the motor with the spiral material level, of the shell is sequentially connected with the first connecting sleeve, the second connecting sleeve and the motor through bolts. In other embodiments, the first connecting sleeve and the second connecting sleeve may be fixedly connected by welding or the like.
In a preferred embodiment of the present invention, a heat insulation layer is filled in an annular cavity surrounded by the screw shaft second segment, the shell and the striker plate, and a gap is left between the heat insulation layer and the screw shaft second segment. The spiral blade is welded and connected to one section of the spiral shaft along the direction of the spiral shaft line, and in other embodiments, the spiral blade can be independently welded and arranged on the spiral shaft after the spiral shaft is purchased.
The heat insulation layer is composed of heat insulation materials, and the heat insulation materials are hardened and matched with the spiral shaft through gaps. It should be noted that the purpose of filling the thermal insulation layer is to insulate heat as much as possible, reduce heat transfer, and protect heat-labile fittings in the level auger outside the silo. And the heat-insulating material is hardened, so that the contact between the spiral shaft and the heat-insulating layer can be avoided, and the service life of the heat-insulating material can be prolonged. Especially, during the working period, the screw shaft is always in a high-speed rotating state, and clearance fit is arranged, so that the service life of the heat insulation layer is prolonged to the greatest extent, and the heat insulation layer is prevented from being frequently disassembled and replaced.
In one embodiment, the striker plate is an annular striker plate, the outer edge of the striker plate is fixedly connected with the shell (the striker plate is prevented from moving up and down, left and right to affect the blocking performance of the material), and the diameter of the inner edge of the striker plate is larger than the diameter of the through shaft of the screw shaft. The baffle plate is arranged to be conveniently sleeved on the through shaft of the spiral shaft.
In a preferred embodiment of the invention, a notch is formed in one end of the casing, which is far away from the screw shaft, so that the material falls into a cavity formed by one section of the screw shaft, the casing and the striker plate. So set up and compare in cylindric spiral shell body, be more convenient for get material and material level and survey. It should be noted that, the size of the notch is based on the requirement that the material falls into the cavity formed by the first section of the screw shaft, the housing and the striker plate, and in practical application, a larger or smaller notch can be cut as required to meet the requirement of material delivery. The above-mentioned gap can be one or more.
The invention provides a material level detection system of a storage bin, which comprises a material level detection device, a material distribution device and a frequency converter, wherein the material level detection device comprises a material level detection device body and a material distribution device; the frequency converter is electrically connected with a motor of the material level detection device; in one embodiment, the distribution device comprises a main distribution spiral and an auxiliary distribution spiral.
It should be noted that, the material distributing device in the material level detecting system may be replaced by a commercially available material distributing device, and is not limited to the main material distributing screw and the auxiliary material distributing screw, and the material distributing device is within the scope of the present invention as long as the material distributing device can uniformly distribute the material.
The invention provides a storage bin which comprises a material level detection device, a material distribution device and a frequency converter, wherein the material level detection device is spatially arranged below the material distribution device, the material distribution device is arranged in the storage bin, a motor of the material level detection device is arranged outside the storage bin, and a spiral shaft of the material level detection device extends into the storage bin. The frequency converter is electrically connected with a motor of the material level detection device.
The material level detection device is spatially arranged below the material distribution device, so that the position of the material is detected.
In order to prevent dust from entering the motor and facilitate overhauling and disassembling, the motor is specially arranged outside the storage bin. The screw shaft of the material level detection device extends into the storage bin to meet the requirement of material level detection of materials.
In a preferred embodiment of the present invention, the material level detecting device includes at least one material level spiral, and when the number of the material level spirals is multiple, the material level spirals are uniformly distributed on two sides of the storage bin or on the same side of the storage bin; and the material level screw is arranged in the storage bin in a mode of at least one layer.
The level detecting device may include only one level screw. A plurality of material level spirals can be set according to the requirement of the material distribution quantity and the requirement of the test accuracy.
In order to prevent uneven distribution, a plurality of material level spirals may be arranged in the circumferential direction of the storage bin to achieve material level detection on the same horizontal line or material level detection on different horizontal lines, for example, a plurality of material level spirals may be uniformly distributed around the storage bin, and one or more material level spirals may be arranged on the same layer or different layers.
The number of layers of arranging can be one, two-layer, three-layer, four or five at least, can arrange according to the detection needs of the material level.
In other embodiments, the material level spiral can be located on the same side of the storage bin, so that material level detection at different heights can be realized.
In a preferred embodiment of the present invention, the distributing device includes a main distributing screw and an auxiliary distributing screw, the main distributing screw and the auxiliary distributing screw are distributed in a crossed manner in the height direction of the storage bin, and the installation position of the main distributing screw is higher than that of the auxiliary distributing screw; the number of the main cloth spirals is at least one, the number of the auxiliary cloth spirals is at least two, and the auxiliary cloth spirals are arranged in parallel; the material level spiral is arranged between two adjacent auxiliary material distribution spirals.
And in the height of the storage bin, the spiral axis of the material level spiral is 10-50mm lower than the spiral axis of the auxiliary material distribution spiral.
In order to prevent the materials from being concentrated and accumulated at a certain position of the storage bin, a main material distribution spiral and an auxiliary material distribution spiral which are distributed in a crossed mode in space are specially arranged, so that uniform material distribution is achieved. The material is distributed uniformly through the matching of the main material distribution spiral and the auxiliary material distribution spiral. In the implementation mode, parameters such as the number, the length, the interval, the rotating speed, the screw pitch and the like of the main material distribution screw and the auxiliary material distribution screw can be selected according to the material distribution requirement of the material. In one embodiment, a main material distribution spiral and an auxiliary material distribution spiral are vertically distributed in space so as to achieve uniform material distribution.
Simultaneously, in order to avoid the position finding to survey inaccurate, perhaps local material level height does not have the representative, specially set up the material level spiral and lie in between two adjacent cloth spirals of assisting, prevent like this that the material that falls from directly pounding to the material level spiral on, bring the incoming current and change, cause the wrong report.
For example: the spiral axis of the material level spiral is 10mm, 20mm,30mm or 50mm lower than the spiral axis of the auxiliary material distribution spiral. In a practical embodiment, the selection may be adaptive according to the measurement needs of the filling level.
In one embodiment, the bottom of the spiral blade of the main distribution spiral is 10-100mm higher than the top of the spiral blade of the auxiliary distribution spiral at the level of the silo. For example, it may be 10mm, 20mm,30mm, 50mm, 60mm, 70mm,80mm or 90 mm.
In a preferred embodiment of the application of the invention, the material level spirals are arranged in the storage bin in an upper layer and a lower layer, wherein the spiral axis of the material level spiral on the upper layer is 10-50mm lower than the spiral axis of the auxiliary material distribution spiral, and the spiral axis of the material level spiral on the lower layer is 500-1000mm lower than the spiral axis of the material level spiral on the upper layer.
In addition, in other embodiments, the spiral axis height of the level spirals of the upper and lower layers can be adaptively adjusted according to actual needs.
In one embodiment, the level screws are arranged on both sides of the silo or on the same side of the silo.
In a preferred embodiment of the invention, a feed inlet is arranged at the top of the storage bin, a discharge outlet is arranged at the bottom of the storage bin, when the feed inlet is arranged at the middle position of the top of the storage bin, the main material distribution screw is positioned below the feed inlet, and at least one main material distribution screw is arranged on each of two sides of the blanking axis of the storage bin; when the feed inlet deviates from the center of the top of the storage bin, the number of the main material distribution screws is 1.
In one embodiment, the primary and secondary cloth spirals are through-axis or cantilever spirals. The spiral that encorbelments is adopted has, and after single material level spiral detected the material, the speed governing alone can be realized to the adjacent supplementary cloth spiral of it, more is favorable to the evenly distributed of material.
The method for detecting the material level or distributing the material by using the storage bin comprises the steps of judging the height of the material level through the current change of the material level spiral, and adjusting the rotating speed of a material distributing device and the steering direction of the material level spiral to realize continuous monitoring of the material level. The current change of the material level spiral is controlled and detected through a frequency converter.
The working principle is as follows: when the material does not reach the height of material level spiral, material level spiral no-load operation, can regard the steady invariant of electric current of the motor of material level spiral this moment, when the material reaches the height of material level spiral, the material is brought into the screw machine casing by the screw axis, because the effect of striker plate, when the material piles up a quantitative, the load grow, material level spiral motor's electric current obviously rises, through monitoring current variation, can judge that the material level in the feed bin has reached the mounting height of material level spiral, through electric linkage control, the reduction is assisted the rotational speed of cloth spiral and can be reduced the height of material in the feed bin, the motor reversal of material level spiral simultaneously, after discharging the material in the casing of screw machine, material level spiral's motor corotation once more continues to monitor the material level. The above steps are repeated in a circulating way, the height of the material level can be continuously monitored, and the purpose of controlling the height of the material level is achieved.
As an alternative, the material level spiral can be arranged in a single layer or in a matching way of high and low layers. The difference lies in, when high low layer set up, and low level material level spiral can detect the material earlier, through electric interlocking control, can carry out the deceleration in advance to assisting the cloth spiral, when high-rise material level spiral also detects the material, can be to assisting the further deceleration of cloth spiral, compare in only setting up individual layer material level spiral, high low layer material level spiral sets up the smooth transition that more is favorable to realizing assisting cloth spiral rotational speed, is unlikely to neglect slowly at the rotational speed, changes too greatly.
Compared with the prior art, the invention has the beneficial effects that:
the spiral is used as a device for monitoring the material level, the high-temperature environment of 450-800 ℃ can be met, the problems of coal tar precipitation and pulverized coal interference do not need to be worried about, and the position of the material can be rapidly judged through the change of current because the material level spiral is always in a forward and reverse rotating state, so that the problems of false alarm and missing report are fundamentally solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of the construction of a level helix according to the present invention;
FIG. 2 is a front view of embodiment 1 of the present invention;
FIG. 3 is a front view of embodiment 2 of the present invention;
FIG. 4 is a top view of examples 1 and 2 of the present invention;
FIG. 5 is a front view of embodiment 3 of the present invention;
FIG. 6 is a top view of example 3 of the present invention;
FIG. 7 is a front view of embodiment 4 of the present invention;
FIG. 8 is a top view of example 4 of the present invention.
Icon: 1-a storage bin; 11-the wall of the silo; 12-a feed inlet; 13-a discharge hole; 2, main material distribution spiral; 21-main cloth helical blade; 3-material level spiral; 301-level screw motor; 302-a coupling; 303-a helical axis; 3031-screw axis one section; 3032-two screw shaft sections; 3033-three sections of spiral shaft; 304-a screw machine housing; 305-a striker plate; 306-a thermal insulation layer; 307-connecting sleeve I; 308-connecting sleeve II; 4-auxiliary material distribution spiral; 41-auxiliary cloth helical blade.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention usually place when in use, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 2 to 8, the present invention provides a high temperature closed storage bin, which includes a material level detection device, and can implement continuous detection of material distribution and material level.
Specifically, referring to fig. 2, the high-temperature closed bunker includes a bunker 1, a feed inlet 12, a discharge outlet 13, a material level screw 3, a material distribution device, and a frequency converter (not shown in the figure, and is externally disposed outside the bunker 1).
Wherein, the distributing device comprises a main distributing spiral 2 and an auxiliary distributing spiral 4. The main material distribution spiral 2 and the auxiliary material distribution spiral 4 are mutually perpendicular in space, in the height direction of the storage bin 1, the mounting position of the main material distribution spiral 2 is higher than that of the auxiliary material distribution spiral 4, the bottom of the main material distribution spiral blade 21 of the main material distribution spiral 2 is higher than that of the auxiliary material distribution spiral blade 41 of the auxiliary material distribution spiral 4 by 10-100mm, and the specific distance can be adjusted according to field design. The main material distributing screw 2 can distribute the material front and back, and the auxiliary material distributing screw 4 can distribute the material left and right.
Referring to fig. 4, a plurality of auxiliary cloth spirals 4 are installed in parallel. A plurality of material level spirals 3 (shown in figure 2) are arranged in parallel below the axes of two adjacent auxiliary material distribution spirals 4, and the material level spirals 3 partially extend into the silo 1. In the height direction of the storage bin 1, the installation position of the material level spiral 3 is lower than that of the auxiliary material distribution spiral 4.
In this embodiment, the level screw 3 is controlled by frequency conversion, and as shown in fig. 1, it includes a level screw motor 301, a screw shaft 303 and a screw housing 304. The screw shaft 303 is provided with a screw shaft first section 3031, a screw shaft second section 3032 and a screw shaft third section 3033 which are fixedly connected in sequence. Wherein, the material level screw motor 301 is arranged at the outer side of the storage bin 1, and the output end of the motor is connected with the screw shaft 303 through the coupling 302; the screw shaft first section 3031 and the screw shaft second section 3032 are arranged in the screw shell 304, the screw shaft first section 3031 is provided with screw blades along the screw shaft line direction, and the screw shaft second section 3032 and the screw shaft third section 3033 are through shafts without screw blades.
The screw shell 304 is made of a high-temperature-resistant and corrosion-resistant material, is cylindrical as a whole, penetrates through the bin wall 11 of the storage bin 1 and is fixedly connected with the bin wall 11 (shown in fig. 2), one end of the screw shell 304 is sequentially connected with the first connecting sleeve 307, the second connecting sleeve 308 and the material level screw motor 301 through bolts, and a notch is formed in the upper half part, close to the end part, of the other end of the screw shell 304 (shown in fig. 1).
The gap is arranged to meet the requirement that the material falls into a cavity formed by the first section of the spiral shaft, the shell and the material baffle plate. So set up and compare in cylindric spiral shell body, be more convenient for get material and material level and survey. It should be noted that the size of the gap is determined to allow the material to fall into the chamber formed by the screw shaft segment 3031, the screw housing 304 and the striker plate 305, and in practical applications, a larger or smaller gap may be cut as needed to allow the material to be delivered. The above-mentioned gap can be one or more.
In the screw shell 304, an annular material baffle 305 is arranged at the position of the helical blade close to the inner wall of the silo 1, the outer edge of the material baffle 305 is fixedly connected with the screw shell 304 (the material baffle is prevented from moving up and down, left and right to affect the blocking performance of the material), and the diameter of the inner edge of the material baffle 305 is slightly larger than that of the through shaft of the screw shaft 303. The arrangement is convenient for the striker plate 305 to be sleeved on the through shaft of the spiral shaft 303.
In order to protect the heat-labile assembly parts at the tail end of the material level spiral 3, a heat insulation layer 306 is filled in an annular cavity enclosed by the material baffle plate 305, the spiral shell body 304 and the spiral shaft 303, and the heat insulation layer 306 can be made of aluminum silicate heat insulation cotton or other materials which can be purchased in the market and have the functions of heat insulation and heat preservation.
In addition, in order to avoid the friction between the heat insulation layer 306 and the screw shaft 303 and ensure that the heat insulation layer 306 is durable, at least the part of the heat insulation layer 306 close to the axial surface of the screw shaft 303 needs to be hardened, and simultaneously, the heat insulation layer 306 and the screw shaft 303 are in clearance fit and the screw shaft 303 can rotate without obstruction. The hardening treatment may be a product obtained by modifying ceramic fiber wool with a surface modifier, or a separately modified insulating brick may be selected as the insulating layer.
In this embodiment, an automatic control technology is adopted to realize the interlocking control of the material level spiral 3 and the auxiliary material distribution spiral 4, and the current change of the material level spiral motor 301 is monitored, so as to adjust the rotating speed of the auxiliary material distribution spiral 4 and the steering direction of the material level spiral motor 301.
Example 1
As shown in fig. 2 and 4, in the present embodiment, the feed port 12 is disposed at a middle position of the top of the silo 1, and appropriate lengths of the middle portions of the main distribution screw 2 and the auxiliary distribution screw 4 (for example, 1.5 times of the outer diameter of the spiral blade of the main distribution screw 2 is set as the length of the through shaft, for example, the outer diameter is 50mm, and the length of the through shaft is 75mm) are set as the through shaft, and no spiral blade is disposed, and the remaining portions are set as the spiral blades, wherein: the two main material distribution spirals 2 are arranged in parallel, so that the front and back distribution of the materials can be realized; the auxiliary material distributing screws 4 are arranged in parallel for 5, so that left and right distribution of materials can be realized.
Trompil on the bulkhead 11 of assisting 4 both ends of cloth spiral, set up material level spiral 3 relatively, material level spiral 3 is located the position between two adjacent main cloth spirals 2, and in the direction of height of feed bin 1, its mounted position is less than the mounted position of assisting cloth spiral 4, and material level spiral 3 sets up according to high, low two-layer simultaneously. The screw axis interval of the material level spiral of upper and lower two-layer is 500mm in this embodiment, and the screw axis interval of material loading spiral and supplementary cloth spiral is 10mm, and the helical blade's of main cloth spiral bottom is higher than the helical blade top 10mm of supplementary cloth spiral.
Example 2
As shown in fig. 3 and 4, the difference from example 1 is that the level spiral 3 is provided in a single layer, and the rest is the same as example 1. The spiral axis line distance of the material level spiral and the auxiliary material distribution spiral is 10mm, and the bottom of the spiral blade of the main material distribution spiral is 10mm higher than the top of the spiral blade of the auxiliary material distribution spiral.
Example 3
As shown in fig. 5 and 6, the difference from the embodiment 1 is that the main material distributing spiral 2 and the auxiliary material distributing spiral 4 are cantilever spirals, each material distributing spiral is individually matched with a driving motor and is suitable for a storage bin with a large span, and the rest is the same as the embodiment 1. The spiral that encorbelments is adopted has, and after single material level spiral detected the material, the speed governing alone can be realized to the adjacent supplementary cloth spiral 4 with it, more is favorable to the evenly distributed of material.
The screw axis interval of the material level spiral of upper and lower two-layer is 800mm in this embodiment, and the screw axis interval of material loading spiral and supplementary cloth spiral is 40mm, and the helical blade's of main cloth spiral bottom is higher than the helical blade top 80mm of supplementary cloth spiral.
Example 4
As shown in fig. 7 and 8, in the present embodiment, the feed inlet 12 is disposed on the left side of the top of the storage bin 1, and the portions of the main material distributing screw 2 and the auxiliary material distributing screw 4 located in the storage bin 1 are both provided with helical blades, wherein: the main material distribution screw 2 is single, and can pull the material from the blanking position to the end far away from the blanking along the screw shaft direction, so that the material is distributed front and back; the auxiliary material distributing screws 4 are arranged in parallel for 5, so that the material can be pulled to the right side from the left side, and left and right distribution of the material is realized.
Trompil on bulkhead 11 on feed bin 1 right side sets up material level spiral 3, and material level spiral 3 is located the position between two adjacent cloth spirals 2, and in the direction of height of feed bin 1, its mounted position is less than the mounted position of assisting cloth spiral 4, and material level spiral 3 sets up according to high, low two-layer simultaneously.
The screw axis interval of the material level spiral of upper and lower two-layer is 1000mm in this embodiment, and the screw axis interval of material loading spiral and supplementary cloth spiral is 30mm, and the helical blade's of main cloth spiral bottom is higher than the helical blade top 100mm of supplementary cloth spiral.
The rest is the same as example 1.
The material level control method and the material level detection method are as follows:
in the production process, when the material does not reach the height of the material level spiral 3, the material level spiral 3 operates in no-load mode, and the current of a motor of the material level spiral 3 is stable and constant; when the material reaches the height of the level screw 3, the material is brought into the screw housing 304 by the screw shaft, and due to the action of the striker plate 305, when the material is accumulated to a certain amount, the load becomes large, and the current of the level screw motor rises significantly. Through the control current change, can judge that the material level in the feed bin has reached the mounting height of material level spiral, through electric linkage control, reduce the rotational speed of assisting the cloth spiral, and then reduce the height of material in the feed bin, the motor reversal of converter control material level spiral 3 simultaneously, with the material discharge back in the spiral shell body 304, the spiral motor corotation once more continues to monitor the material level.
The above steps are repeated in a circulating way, the height of the material level can be continuously monitored, and the purpose of controlling the height of the material level is achieved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A material level detection device is characterized by comprising a material level screw, wherein the material level screw comprises a motor, a screw shaft and a shell, the screw shaft is provided with a screw shaft first section, a screw shaft second section and a screw shaft third section which are fixedly connected in sequence, a screw blade is arranged on the screw shaft first section along the screw shaft line direction, a material baffle is arranged between the screw shaft first section and the screw shaft second section at intervals to prevent materials from entering the screw shaft second section from the screw shaft first section, the screw shaft first section and the screw shaft second section are arranged in the shell, and the power output end of the motor is connected with the screw shaft third section of the screw shaft through a coupler;
one end of the shell, which is far away from the screw shaft section, is provided with a notch so as to enable materials to fall into a cavity formed by the screw shaft section, the shell and the material baffle plate.
2. The material level detecting device as claimed in claim 1, further comprising a connecting sleeve, wherein the three sections of the screw shaft and the coupling are arranged in the connecting sleeve; the connecting sleeve comprises a first connecting sleeve and a second connecting sleeve which are fixedly connected, one end of the first connecting sleeve is fixedly connected with the shell, and one end of the second connecting sleeve is fixedly connected with the shell of the motor.
3. The material level detection device according to claim 1, wherein a heat insulation layer is filled in an annular cavity surrounded by the screw shaft second section, the shell and the striker plate, and a gap is reserved between the heat insulation layer and the screw shaft second section; and a section of the spiral shaft is welded and connected with a spiral blade along the direction of the spiral shaft line.
4. The material level detecting device according to claim 3, wherein the striker plate is an annular striker plate, the outer edge of the striker plate is fixedly connected with the shell, and the diameter of the inner edge of the striker plate is larger than the diameter of the through shaft of the screw shaft.
5. The material level detection system of the storage bin is characterized by comprising the material level detection device as claimed in any one of claims 1 to 4, a material distribution device and a frequency converter; the frequency converter is electrically connected with a motor of the material level detection device;
the distributing device comprises a main distributing spiral and an auxiliary distributing spiral.
6. A storage bin, comprising the material level detecting device as claimed in any one of claims 1 to 4, the storage bin further comprising a material distribution device and a frequency converter, wherein the material level detecting device is spatially arranged below the material distribution device, the material distribution device is arranged in the storage bin, the motor of the material level detecting device is arranged outside the storage bin, and the spiral shaft of the material level detecting device extends into the storage bin at one section; the frequency converter is electrically connected with a motor of the material level detection device.
7. The storage bin as claimed in claim 6, wherein the material level detecting device comprises at least one material level spiral, and when the number of the material level spirals is multiple, the material level spirals are uniformly distributed on two sides of the storage bin or on the same side of the storage bin; and the material level spiral is arranged in the storage bin in at least one layer mode.
8. The storage bin as claimed in claim 6 or 7, wherein the distribution device comprises a main distribution spiral and an auxiliary distribution spiral, the main distribution spiral and the auxiliary distribution spiral are spatially distributed in a crossed manner in the height direction of the storage bin, and the installation position of the main distribution spiral is higher than that of the auxiliary distribution spiral; the number of the main distributing spirals is at least one, the number of the auxiliary distributing spirals is at least two, and the auxiliary distributing spirals are arranged in parallel; the material level spiral is arranged between two adjacent auxiliary material distribution spirals; and on the height of the storage bin, the spiral axis of the material level spiral is 10-50mm lower than the spiral axis of the auxiliary material distribution spiral; the bottom of the spiral blade of the main material distribution spiral is 10-100mm higher than the top of the spiral blade of the auxiliary material distribution spiral.
9. The storage bin as claimed in claim 8, wherein the level screws are arranged in the storage bin in an upper layer and a lower layer, wherein the spiral axis of the level screw in the upper layer is 10-50mm lower than the spiral axis of the auxiliary distributing screw, and the spiral axis of the level screw in the lower layer is 500-1000mm lower than the spiral axis of the level screw in the upper layer;
the material level spiral set up in the both sides of feed bin or be located the homonymy of feed bin.
10. The storage bin as claimed in claim 8 or 9, wherein a feed inlet is arranged at the top of the storage bin, a discharge outlet is arranged at the bottom of the storage bin, when the feed inlet is arranged at the middle position of the top of the storage bin, the main distribution screw is positioned below the feed inlet, and at least one main distribution screw is arranged on each of two sides of a blanking axis of the storage bin; when the feed inlet deviates from the center of the top of the storage bin, the number of the main material distribution spirals is 1;
the main material distribution spiral and the auxiliary material distribution spiral are through shaft spirals or overhanging spirals.
11. A method for detecting material level or distributing material in the storage bin, which is characterized in that the method comprises the steps of determining the height of the material level through the current change of the material level spiral, and adjusting the rotating speed of the material distributing device and the steering direction of the material level spiral to realize the continuous monitoring of the material level.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110416195.8A CN112964331A (en) | 2021-04-16 | 2021-04-16 | Material level detection device, stock bin and material level detection system of stock bin |
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| CN202110416195.8A CN112964331A (en) | 2021-04-16 | 2021-04-16 | Material level detection device, stock bin and material level detection system of stock bin |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113532896A (en) * | 2021-06-29 | 2021-10-22 | 三一汽车制造有限公司 | Dust removal equipment monitoring method and monitor thereof, and dust removal equipment |
| CN114279230A (en) * | 2021-12-21 | 2022-04-05 | 广西柳钢东信科技有限公司 | Cold quick-witted hopper material level detection device of ring based on baroceptor |
| CN114590607A (en) * | 2022-03-09 | 2022-06-07 | 上海电气集团股份有限公司 | Slag discharging system for high-temperature ash and use method thereof |
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2021
- 2021-04-16 CN CN202110416195.8A patent/CN112964331A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113532896A (en) * | 2021-06-29 | 2021-10-22 | 三一汽车制造有限公司 | Dust removal equipment monitoring method and monitor thereof, and dust removal equipment |
| CN114279230A (en) * | 2021-12-21 | 2022-04-05 | 广西柳钢东信科技有限公司 | Cold quick-witted hopper material level detection device of ring based on baroceptor |
| CN114590607A (en) * | 2022-03-09 | 2022-06-07 | 上海电气集团股份有限公司 | Slag discharging system for high-temperature ash and use method thereof |
| CN114590607B (en) * | 2022-03-09 | 2024-03-19 | 上海电气集团股份有限公司 | Slag discharging system for high-temperature ash and using method thereof |
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