CN115406802A - Volume weight on-line detection device and volume weight detection method thereof - Google Patents

Abstract

The invention relates to a volume weight on-line detection device and a volume weight detection method thereof, wherein the volume weight on-line detection device comprises: the hopper is provided with a discharge cavity, a side material cavity and a sampling cavity, the upper opening of the discharge cavity is communicated with the sampling cavity, the lower end of the sampling cavity is communicated with the side material cavity, and the lower end of the side material cavity is communicated with the lower opening of the discharge cavity; the material taking module comprises a first power source and a baffle plate in transmission connection with the first power source, the baffle plate is rotatably arranged in the material discharging cavity to realize switching between a material taking state and a material discharging state, the baffle plate is connected with an upper opening of the sampling cavity in the material taking state and is used for guiding puffed materials into the sampling cavity, and the baffle plate opens the material discharging cavity in the material discharging state to realize the discharge of the puffed materials; the weighing module comprises a weighing component, a scraping component and a bearing component, the weighing component is arranged in the side material cavity, the scraping component is used for scraping redundant expanded materials, and the bearing component is used for switching between covering and exposing a lower opening of the weighing component; the heating module is arranged on the weighing component to ensure the weighing component to be at a constant temperature; automatic detection is realized, and the detection precision and the accuracy are high.

Description

On-line bulk density detection device and its bulk density detection method

technical field

The invention relates to the technical field of feed processing machinery, in particular to an on-line bulk density detection device and a bulk density detection method thereof.

Background technique

Extruded materials are widely used as feed pellets due to their excellent characteristics such as high palatability, easy digestion, high protein titer, good hygienic quality and low raw material cost, and the extruders used to produce extruded materials are also developing rapidly.

The extruder is used to cut, mix, knead, extrude, and cut raw materials to form pellet feed. According to the sinking and floating properties, pellet feed is divided into floating feed, moderate floating feed, slow sinking feed and fast sinking feed. The ups and downs of pellet feed are closely related to its bulk density, as shown in the table below:

Bulk density is an important indicator that affects the characteristics of puffed products. At present, manual testing is mainly used. The operator takes the material from the discharge port and pours it into the measuring cup, then scrapes off the excess feed on the measuring cup with tools and weighs it, and finally pours the feed. Go back to the conveying line of the extruder discharge and clean the residue in the measuring cup to complete a test of the bulk density; then determine the relevant operating parameters according to the results of the bulk density test and judge and adjust the operation manually, but the manual detection and operation adjustment make Higher requirements for operating skills, increased labor intensity, lower detection efficiency, and inevitable human errors will inevitably lead to the inability to effectively track the production process, resulting in a low degree of automation of the overall equipment and high production costs.

In addition, the water content of puffed products is relatively high. At present, most of the bulk density equipment cannot realize automatic bulk density detection. Part of the reason is that puffed products with high humidity are easy to stick to the bulk density detector. When weighing the inner wall of the hopper, the weight of the puffed substance itself is not applied to the load cell. Therefore, even though the weighing hopper seems to be full of puffed substance, in fact part of the puffed substance does not participate in the weighing, thus Resulting in a large difference in weighing accuracy.

Contents of the invention

Based on this, it is necessary to address the above-mentioned problems and provide an on-line bulk density detection device and a bulk density detection method thereof, which can realize the on-line automatic bulk density detection, and have high precision and high accuracy of the bulk density detection.

The invention provides an on-line detection device for bulk density, which is matched with an extruder and a conveying line, including:

The hopper has a discharge cavity, a side material cavity, and a sampling cavity. The discharge cavity is located between the discharge port of the extruder and the conveying line, and the upper opening is connected to the sampling cavity. The lower end of the sampling cavity is It communicates with the side material chamber, and the lower end of the side material chamber communicates with the lower opening of the discharge chamber;

The reclaiming module includes a baffle and a first power source, the first power source is set on one side of the hopper and is connected to the baffle in transmission, one end of the baffle is rotatably set on the row In the material chamber to realize the switching between the feeding state and the discharging state, in the feeding state, the other end of the baffle is connected to the upper opening of the sampling chamber and is used to introduce puffed matter into the sampling chamber , in the discharge state, the baffle plate opens the discharge chamber to realize puffed matter being discharged from the discharge chamber;

Weighing module, including a weighing component, a scraping component and a carrying component arranged in the hopper, and the weighing component is arranged in the side material cavity, and is used to cooperate with the carrying component to accept the sample from the sampling cavity. The puffed matter falling into the lower opening and collect the volumetric information, the scraper assembly is used to scrape off the excess puffed matter from the upper opening of the weighing assembly, and the bearing assembly is used to cover and expose the lower opening of the weighing assembly switch between openings;

The heating module is arranged on the weighing assembly, and is used to ensure that the weighing assembly is in a constant temperature state.

In the above-mentioned bulk density online detection device, the puffed product processed by the puffing machine falls into the hopper through the discharge port. When no detection is required, the baffle is in the discharge state, the baffle is opened, and the upper opening and the lower opening of the discharge chamber are connected. , the puffed matter falls directly from the discharge chamber to the conveying line, and the bearing component blocks the lower opening of the weighing component. During the detection, the heating module works to ensure that the weighing component is in a constant temperature state. At this time, the puffed material will not stick to the weighing component. On the heavy component; the first power source acts to drive the baffle to rotate, the baffle is switched from the discharge state to the reclaim state, and the puffed matter enters the sampling chamber through the upper opening of the discharge chamber, the baffle, and the upper opening of the sampling chamber , and fall into the weighing assembly through the lower opening of the sampling cavity and the upper opening of the weighing assembly, and after the set time, the first power source reverses, the baffle returns to the discharge state, and the automatic sampling ends; scraping The material component moves to scrape off the excess puffed matter on the upper opening of the weighing component and resets after the scraping is completed. The weighing component collects the bulk density information, and the bulk density collection is completed; The material flows from the lower opening of the weighing component to the lower opening of the discharge chamber through the lower end of the side material chamber, and resets after the discharge is completed. Once the online volumetric detection is completed, the above online volumetric detection is repeated according to the set time length, which can Realize the on-line automatic detection of bulk density in the whole process of puffed product production, reduce human intervention, reduce the work intensity of operators, improve the degree of automation and production efficiency of production, and the puffed product will not stick to the weighing components during the whole detection process , so that all the puffed matter participates in the weighing, so that the accuracy and accuracy of the volumetric detection are higher.

In one of the embodiments, the weighing assembly includes a load cell, a fixing base, and a tank body with openings at both ends, one end of the fixing base is installed on the inner wall of the side material cavity, and the other end passes through the weighing The sensor is supported and connected to the tank body, the weighing sensor is used to collect bulk density information, at least part of the orthographic projection of the lower opening of the sampling chamber falls into the upper opening of the tank body, and the heating module is arranged on the outside of the tank.

In one of the embodiments, the heating module is a tubular heater, and the heater is sheathed on the outside of the tank.

In one of the embodiments, the tank body is a cone-shaped structure, and the large end opens toward the bottom of the sampling chamber.

In one of the embodiments, the weighing assembly further includes a conical first plate body, one end of the first plate body is sleeved and fixed on the outside of the opening on the tank body, and the other end faces toward the One side of the lower opening of the tank extends, and the weighing sensor is covered.

In one of the embodiments, the first power source includes a first cylinder and an L-shaped rotating shaft, the cylinder body of the first air cylinder is installed on the outer wall of the hopper, and one end of the L-shaped rotating shaft is connected to the first The protruding ends of a cylinder are connected, and the other end protrudes into the discharge cavity and is connected with the baffle plate.

In one of the embodiments, the scraper assembly includes a second power source and a scraper, the fixed end of the second power source is installed on the side material chamber, and the output end is used to provide a moving force along the first direction. For driving force, the scraper is arranged in the side material chamber and connected to the output end of the second power source, and its lower end is located on the plane where the upper opening of the weighing assembly is located.

In one of the embodiments, the scraper assembly further includes a guide rail, the guide rail is installed on the inner wall of the side material chamber and extends along the first direction, and the guide rail and the scraper are arranged in the Swipe mate in first direction up.

In one of the embodiments, the carrying assembly includes a third power source and a bottom plate, the fixed end of the third power source is installed on the side material cavity and the output end is used to provide a driving force for moving in the second direction , the bottom plate is arranged in the side material chamber and connected to the output end of the third power source, and the upper end surface is located on the plane where the lower opening of the weighing assembly is located.

In one of the embodiments, the carrying assembly further includes an ear seat and a pin shaft, the ear seat is installed on the outer side of the weighing assembly close to its lower opening, and is perpendicular to the bottom plate through the pin shaft. Rotate the connection in the direction of the bottom plate.

In one of the embodiments, the on-line bulk density detection device also includes a cleaning component, the cleaning component includes an air guide tube, a nozzle, an air tube and an air source, one end of the air guide tube is inserted in the sampling chamber and connected to the nozzle The other end is located in the side material cavity and connected to one end of the air pipe, the other end of the air pipe is connected to the air source, and the air source is arranged in the hopper.

In one of the embodiments, the hopper includes a first housing, a second housing and a third housing, wherein:

The first housing is a funnel-shaped structure for forming the discharge chamber;

The second housing is a cover structure with one end open, and the cover is arranged on the side plate of the first housing, and is used to cooperate with the first housing to form the discharge chamber;

The third casing is a funnel-shaped structure, one end communicates with the side plate of the first casing, and the other end is inserted obliquely downward into the second casing to form the sampling chamber.

In one of the embodiments, the hopper further includes multiple sets of adjustment seats and adjustment legs, the adjustment seats are installed on the outside of the second housing, and the adjustment legs are screwed to the adjustment seats for for supporting the second casing.

In addition, the present invention also provides a method for detecting the volumetric density of the online volumetricity detection device described in any one of the above technical solutions, comprising the following steps:

S1, the heating module heats the weighing component to ensure that the weighing component is in a constant temperature state;

S2, the first power source drives the baffle to switch from the discharging state to the retrieving state, and drives the baffle to return to the discharging state after a set time;

S3, the scraping component scrapes off excess puffed matter on the opening of the weighing component;

S4, the weighing component collects the bulk density information of the puff;

S5, the bearing assembly is switched from covering the lower opening of the weighing assembly to exposing the lower opening of the weighing assembly, and returning to the lower opening covering the weighing assembly after a set time.

In the bulk density detection method of the above-mentioned bulk density online detection device, the puffed product processed by the puffing machine falls into the hopper through the discharge port. When no detection is required, the baffle is in the discharge state. The lower openings are connected, the puffed matter falls directly from the discharge chamber to the conveying line, and the carrying component blocks the lower opening of the weighing component. At the beginning of a test, firstly, through step S1, the heating module works to heat the weighing component to ensure that the weighing component is in a constant temperature state, and at this time the puffed matter will not stick to the weighing component; The source moves to drive the baffle to rotate, and the baffle switches from the discharging state to the retrieving state. The puffed matter enters the sampling chamber through the upper opening of the discharging chamber, the baffle, and the upper opening of the sampling chamber, and passes through the lower part of the sampling chamber. The opening and the upper opening of the weighing assembly fall into the weighing assembly, and after the set time, the first power source acts in reverse, the baffle returns to the discharge state, and the automatic sampling ends; then through step S3, the scraping assembly Action, to scrape off the excess swelling on the upper opening of the weighing component and reset after the scraping is completed; then through step S4, the weighing component collects the bulk density information, and the bulk density collection ends; finally, through step S5, the carrying component moves, weighing The lower opening of the heavy component is exposed, and the puffed matter flows from the lower opening of the weighing component through the lower end of the side material chamber to the lower opening of the discharge chamber, and resets after the discharge is completed, and an online bulk density detection is completed. According to the set duration, the above steps S1-S5 are repeated, which can easily and conveniently realize the online automatic detection of bulk density in the whole process of puffed product production, reduce human intervention, reduce the work intensity of operators, and improve the degree of automation and production efficiency of production. , and the puffed matter will not stick to the weighing component during the whole detection process, so that all the puffed matter participates in the weighing, so that the accuracy and accuracy of the volumetric density detection are higher.

Description of drawings

Fig. 1 is a schematic structural view of a kind of bulk density on-line detection device provided by the present invention at an angle;

Fig. 2 is a schematic structural view of a bulk density online detection device provided by the present invention at another angle;

Fig. 3 is the front view of the bulk density online detection device in Fig. 1;

Fig. 4 is the internal schematic diagram of the on-line bulk density detection device in Fig. 1 when the bulk density is detected;

Fig. 5 is an internal schematic view of the bulk density online detection device in Fig. 1 when discharging and cleaning;

Fig. 6 is the sectional view of bulk density online detection device in Fig. 1;

Fig. 7 is a cross-sectional view of another module composed of a tank body, a first plate body and an ear seat provided by the present invention;

Figure 8 is an enlarged schematic view of position A in Figure 6;

Fig. 9 is a flow chart of a volume density detection method of a volume density online detection device provided by the present invention.

Reference signs:

10. Bulk density online detection device; X, the first direction; Y, the second direction; Z, the vertical direction;

100, hopper; 110, discharge cavity; 120, side material cavity; 130, sampling cavity; 140, first shell; 141, first side plate; 142, second side plate; 150, second shell; 151 , the bottom wall; 152, the viewing window; 160, the third housing; 170, the casters; 180, the adjustment seat; 190, the adjustment legs;

200. Reclaiming module; 210. Baffle plate; 220. First power source; 221. First cylinder; 222. L-shaped rotating shaft; 230. Support;

300, weighing module; 310, weighing component; 311, weighing sensor; 312, fixed seat; 313, tank body; 314, first plate body; 320, scraping component; 321, second power source; Scraper; 323, guide rail; 330, bearing assembly; 331, third power source; 332, bottom plate; 333, lug seat; 334, pin shaft;

400. Heating module;

500, blowing assembly; 510, air guide pipe; 520, nozzle; 530, air pipe.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiment.

The technical solutions provided by the embodiments of the present invention are described below with reference to the accompanying drawings.

As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the present invention provides an on-line bulk density detection device 10, which cooperates with the extruder and the conveying line to realize the on-line automatic detection of the bulk density of the extruded material in the production operation of the extruder And the automatic adjustment of the operating parameters of the extruder, in the specific setting, the volume density online detection device 10 is installed relative to the extruder and the conveying line. The volume density online detection device 10 includes a hopper 100, a reclaiming module 200, a weighing module 300 and a heating module 400, wherein:

The hopper 100 has a discharge chamber 110, a side material chamber 120, and a sampling chamber 130. The discharge chamber 110 is located between the discharge port of the extruder and the conveying line, and the upper opening of the discharge chamber 110 is located below the discharge port of the extruder. , the lower opening of the discharge chamber 110 is located above the conveying line. In specific setting, the hopper 100 includes a first shell 140, a second shell 150 and a third shell 160, the first shell 140, the second shell 150, and the third shell 160 can be integrally formed, or can be divided into two parts. After the body is prepared, they are assembled together; the first housing 140 is a funnel-shaped structure, which is used to form the discharge chamber 110, and in order to facilitate movement, the bottom of the first housing 140 is provided with a plurality of casters 170; the second housing 150 is A cover structure with one end open, the second shell 150 is covered on the side plate of the first shell 140 , and together with the first side plate 141 of the first shell 140 forms a side material chamber 120 .

The lower end of the side material chamber 120 communicates with the lower opening of the discharge chamber 110 , the upper opening of the sampling chamber 130 communicates with the upper opening of the discharge chamber 110 , and the lower end of the sampling chamber 130 communicates with the side material chamber 120 . In the specific setting, the side material chamber 120 and the discharge chamber 110 are arranged side by side, the third housing 160 is a funnel-shaped structure, and one end cover is arranged on the upper end opening of the first side plate 141, and the other end extends obliquely downward for Constitute the sampling cavity 130; the lower opening of the side material cavity 120 is opened at the lower end of the first side plate 141, in order to facilitate the puffed matter in the side material cavity 120 to fall, the bottom wall 151 of the second housing 150 extends obliquely downward, and is away from One end of the first side plate 141 is located above the end close to the first side plate 141; in order to support the hopper 100 and ensure the stability and levelness of the hopper 100, the outside of the second housing 150 is uniformly provided with a plurality of adjustment seats 180 and A plurality of adjustment legs 190, the adjustment seat 180 is installed on the outer wall of the second housing 150, the adjustment legs 190 are locked in the threaded holes of the adjustment seat 180, and after the adjustment legs 190 are adjusted to an appropriate height, the nuts Locking; in order to facilitate the observation of working conditions, the second housing 150 is also provided with a viewing window 152 .

The reclaiming module 200 includes a baffle plate 210 and a first power source 220. The fixed end of the first power source 220 is installed on one side of the hopper 100, and the output end of the first power source 220 is connected to the baffle plate 210. The baffle plate 210 One end of one end is set in the discharge cavity 110, and the baffle plate 210 can rotate in the discharge cavity 110, the baffle plate 210 has a discharge state and a material retrieving state, and the baffle plate 210 rotates between the discharge state and the retrieving state switch. When the discharge state, the baffle plate 210 is opened, and the existence of the baffle plate 210 will not stop the puffed material from falling in the discharge chamber 110. At this time, the upper opening and the lower opening of the discharge chamber 110 are connected; The other end of the baffle plate 210 communicates with the upper opening of the sampling chamber 130. The baffle plate 210 is used to introduce puffed matter into the sampling chamber 130. When specifically set, the baffle plate 210 can separate the opening of the sampling chamber 130 when it is in the state of taking materials. The upper opening and the lower opening of the discharge chamber 110 are disconnected at this time, and the expanded matter enters the sampling chamber 130 .

The weighing module 300 includes a weighing assembly 310, a scraping assembly 320 and a carrying assembly 330. The weighing assembly 310 is installed inside the side material chamber 120. The carrying assembly 330 and the scraping assembly 320 are installed on the hopper 100 respectively. The carrying assembly 330 It is used to switch between covering the lower opening of the weighing assembly 310 and exposing the lower opening of the weighing assembly 310 . When the carrying assembly 330 is switched to cover the lower opening of the weighing assembly 310, the weighing assembly 310 cooperates with the carrying assembly 330 to accept the puffed matter falling from the lower opening of the sampling chamber 130, and the scraping assembly 320 is used to scrape off The excess puffed matter on the upper opening of the weighing assembly 310. At this time, the weighing assembly 310 is also used to collect the bulk density information of the puffed matter. When the bearing assembly 330 is switched to expose the lower opening of the weighing assembly 310, the The puffed matter falls to the side feed chamber 120, then flows into the discharge chamber 110, and finally flows into the conveying line.

The heating module 400 is arranged on the weighing assembly 310, and the heating module 400 is used to ensure that the weighing assembly 310 is in a constant temperature state. When the weighing assembly 310 is in a constant temperature state, the puffed matter will not stick to the weighing assembly 310.

In the above-mentioned bulk density online detection device 10, the puffed product processed by the puffing machine falls into the hopper 100 through the discharge port. When no detection is required, the baffle 210 is in the discharge state. , and the lower opening are connected, and the puffed matter is directly dropped from the discharge chamber 110 to the conveying line for subsequent operations. In a constant temperature state, the puffed matter will not stick to the weighing component 310 at this time; the first power source 220 acts to drive the baffle plate 210 to rotate, and the baffle plate 210 switches from the discharge state to the retrieving state, and the puffed matter passes through the discharge state. The upper opening of the chamber 110, the baffle plate 210, and the upper opening of the sampling chamber 130 enter the sampling chamber 130, and fall into the weighing assembly 310 through the lower opening of the sampling chamber 130 and the upper opening of the weighing assembly 310, and After the set time, the first power source 220 acts in reverse, the first power source 220 drives the baffle plate 210 to return to the discharge state, and the automatic sampling ends; the scraping component 320 moves to scrape off excess The puffed product is reset after the scraping is completed, the weighing component 310 collects the bulk density information, and the bulk density collection is completed; the bearing component 330 moves, the lower opening of the weighing component 310 is exposed, and the puffed product passes through the side material from the lower opening of the weighing component 310 The lower end of the chamber 120 flows to the lower opening of the discharge chamber 110, and resets after the discharge is completed. Once the online bulk density detection is completed, the above-mentioned online bulk density detection is controlled according to the set time. Automatic detection, reducing human intervention, reducing the work intensity of operators, improving production automation and production efficiency, and the puffed matter will not stick to the weighing component 310 during the entire detection process, so that all puffed matter is Participate in weighing, so that the accuracy and accuracy of volumetric detection are higher, and the product yield of puffed products is improved.

There are many structural forms of the first power source 220. In a preferred embodiment, as shown in Figure 1, Figure 3, Figure 4 and Figure 5, the first power source 220 includes a first cylinder 221 and an L-shaped rotating shaft 222, The cylinder body of the first cylinder 221 is installed on the outer wall of the hopper 100 through the support 230, and one end of the L-shaped rotating shaft 222 is connected with the extended end of the first cylinder 221 through snap connection, concave-convex fit, screw connection, etc. The other end of the L-shaped rotating shaft 222 protrudes into the discharge chamber 110, and is integrally connected with the baffle plate 210 through buckle connection, concave-convex fit, screw connection and the like. When specifically set up, the hopper 100 has a first direction X and a second direction Y, the first direction X is the arrangement direction of the side material chamber 120 and the discharge chamber 110, the second direction Y is perpendicular to the first direction X, vertical direction Z, the first housing 140 has a second side plate 142 connected to the first side plate 141, the other end of the L-shaped rotating shaft 222 passes through the through hole on the second side plate 142 along the second direction Y, and Can be rotated in this through hole.

In the above-mentioned bulk density online detection device 10, the first cylinder 221 moves forward, and the protruding end of the first cylinder 221 stretches out, and drives the L-shaped rotating shaft 222 to rotate forward, and the L-shaped rotating shaft 222 drives the baffle plate 210 to rotate together. , the baffle plate 210 leaves the discharge state and switches to the reclaim state, so as to control the flow direction of the puffed substance from the discharge chamber 110 to the sampling chamber 130, so that automatic sampling can be realized. After the automatic sampling is finished, the first cylinder 221 acts in reverse, the extended end of the first cylinder 221 retracts, and drives the L-shaped rotating shaft 222 to rotate in the opposite direction, and the L-shaped rotating shaft 222 drives the baffle plate 210 to rotate together, and the baffle plate 210 returns to the discharge state from the retrieving state, so as to control the flow direction of the puffed product to switch from the sampling chamber 130 to the straight drop in the discharge chamber 110, so as to continue to discharge the puffed product to the conveying line. In the specific setting, the structural form of the first power source 220 is not limited to the above-mentioned structure, and can also be other structural forms that can meet the requirements. For example, the first power source 220 is a servo motor, and the output shaft of the servo motor is along the second direction. Y extension.

There are various structural forms of the weighing assembly 310. In a preferred embodiment, as shown in FIG. 4, FIG. 5 and FIG. One end of 312 is installed on the inner wall of the side material cavity 120 through snap connection, concave-convex fit, screw connection, etc., and the other end of the fixing seat 312 is connected to the tank body 313 through the load cell 311, and the fixing seat 312 is connected to the load cell 311, The connection between the load cell 311 and the tank body 313 can be a snap connection, a concave-convex fit, or a screw connection. The load cell 311 supports the tank body 313, so that the tank body 313 is suspended in the side material chamber 120, and the load cell 311 is used for collecting volumetric information. Both ends of the tank body 313 are open, at least part of the orthographic projection of the lower opening of the sampling cavity 130 falls into the upper opening of the tank body 313 , and the heating module 400 is arranged outside the tank body 313 . In the specific setting, the lower opening of the sampling chamber 130 extends along the vertical direction Z to avoid splashing of puffed matter, the lower opening of the sampling chamber 130 is opposite to the upper opening of the tank body 313, and the lower opening area of the sampling chamber 130 is smaller than The upper opening area of the tank body 313 is so that the puffed matter falls into the tank body 313 .

In the above-mentioned on-line bulk density detection device 10, the carrying assembly 330 blocks the lower opening of the weighing assembly 310 during automatic sampling and bulk density collection, and the puffed matter falls into the tank body 313 through the lower opening of the sampling cavity 130 and the upper opening of the tank body 313 , and after the automatic sampling is finished, the scraper assembly 320 scrapes off the excess puffed matter on the upper opening of the tank body 313, the load cell 311 collects the volumetric weight information, and the heating module 400 heats the tank body 313 to prevent the puffed matter from sticking to the tank body On the inner wall of 313, the weight of the puffed matter itself is applied to the load cell 311, and all the puffed matter participates in weighing, which improves the accuracy of weighing. However, since the mass of each liter of puffed matter is only a few hundred grams, and only the weighing component 310 and the puffed matter are weighed and measured, the total mass to be weighed is relatively small, and the accuracy of the volumetric density detection is relatively high.

In order to further improve the detection accuracy of the bulk density, specifically, as shown in FIG. 4 , FIG. 5 and FIG. 6 , the heating module 400 is a tubular heater, and the heater is sheathed on the outside of the tank body 313 . In a specific configuration, the heater 420 may be an electric heating plate, an electric heating tube, or the like. During detection, the heater 420 is started, and the heat generated by the heater 420 makes the temperature of the tank body 313 rise and maintain a certain temperature, reducing or avoiding the sticking of moist puffed matter on the inside of the tank body 313, especially reducing the moisture content of small particles. The bonding of puffed matter reduces the error of bulk density detection.

In order to further improve the accuracy of volumetric detection, specifically, as shown in Figure 4, Figure 5, Figure 6 and Figure 7, the weighing assembly 310 also includes a conical first plate 314, the first plate 314 is sleeved on the tank body On the outer side of the upper opening of 313, one end of the first plate 314 is connected with the outer wall of the opening on the tank body 313 as a whole through buckle connection, concave-convex fit, screw connection, integral molding, etc., and the other end of the first plate 314 faces toward the One side of the lower opening of the tank body 313 is extended, and the load cell 311 is covered, which can prevent puffs from accumulating on the support of the load cell 311 on the one hand, reduce the error of volumetric detection, and make the splashed The puffed matter slides down along the first plate body 314, so as to prevent the introduction of the first plate body 314 from adversely affecting the bulk density detection.

In order to further improve the detection accuracy of the bulk density, specifically, as shown in FIG. 7 , the tank body 313 has a conical structure, and the tank body 313 adopts a small upper part and a larger lower part, and the large end of the tank body 313 faces the lower opening of the sampling chamber 130 On the one hand, it can reduce the pressure on the inner wall of the tank body 313 after the puffed matter accumulates, and improve the structural stability of the weighing assembly 310; It can reduce the bonding of small particles of moist puffed matter, thereby reducing the error of bulk density detection.

There are various structural forms of the scraper assembly 320. In a preferred embodiment, as shown in FIG. 1, FIG. 2, FIG. 3, FIG. 5 and FIG. 6, the scraper assembly 320 includes a second power source 321 and a scraper 322 , the fixed end of the second power source 321 is installed on the side plate of the side material chamber 120 through snap connection, concave-convex fit, screw connection, etc., and the output end of the second power source 321 is used to provide movement along the first direction X The driving force, the scraper 322 is set in the side material chamber 120, and the output end of the scraper 322 and the second power source 321 is connected as a whole through buckle connection, concave-convex fit, screw connection, etc. The lower end of the scraper 322 is located at On the plane where the upper opening of the weighing assembly 310 is located, in specific settings, the surface where the lower end of the scraper 322 is located coincides with the plane where the upper opening of the weighing assembly 310 is located, and the upper opening of the weighing assembly 310 is located at the lower end of the scraper 322 on the reciprocating stroke.

In the above-mentioned bulk density online detection device 10, after the automatic sampling is completed, the second power source 321 moves forward, and the output end of the second power source 321 stretches out and drives the scraper 322 toward the top of the weighing assembly 310 along the first direction X. The opening moves, and the scraper 322 scrapes off the excess puffed matter on the upper opening of the tank body 313 to ensure that the volume of the puffed matter measured each time is the same; the second power source 321 acts in reverse, and the output end of the second power source 321 retracts And drive the scraper 322 to leave the upper opening of the weighing assembly 310 and reset. In the specific setting, in order to ensure the stability of the movement of the scraper 322, the scraper assembly 320 also includes a guide rail 323, and the guide rail 323 is installed on the side material chamber 120 along the first direction X through snap connection, concave-convex fit, screw connection, etc. On the side plate, one end of the scraper 322 is inserted into the chute of the guide rail 323, and the scraper 322 can slide along the first direction X in the guide rail 323; the second power source 321 can be a cylinder, or a servo motor+ The structural form of the lead screw can also be other structural forms that can meet the moving requirements.

There are many structural forms of the bearing assembly 330. In a preferred embodiment, as shown in Figure 1, Figure 2, Figure 3, Figure 4, Figure 5 and Figure 6, the bearing assembly 330 includes a third power source 331 and a bottom plate 332 , the fixed end of the third power source 331 is installed on the side plate of the side material chamber 120 through snap connection, concave-convex fit, screw connection, etc., and the output end of the second power source 321 is used to provide movement along the second direction Y The driving force of the bottom plate 332 is set in the side material chamber 120, and the bottom plate 332 and the output end of the third power source 331 are connected as a whole through buckle connection, concave-convex fit, screw connection, etc. In the specific setting, the bottom plate 332 One end has a cylindrical boss, and the output end of the third power source 331 is sleeved on the cylindrical boss. The upper end surface of the base plate 332 is located on the plane where the lower opening of the weighing assembly 310 is located. In specific settings, the surface where the upper end of the base plate 332 is located coincides with the plane where the lower opening of the weighing assembly 310 is located, and the lower opening of the weighing assembly 310 is located on the plane of the lower opening of the base plate. 332 on the reciprocating stroke of the upper end.

In the above-mentioned volumetric online detection device 10, after the volumetric collection is completed, the third power source 331 moves forward, and the output end of the third power source 331 protrudes and drives the bottom plate 332 away from the lower opening of the weighing assembly 310 along the second direction Y. , the lower opening of the tank body 313 is exposed, and the puffed matter is discharged under the action of gravity; the third power source 331 reverses, the output end of the third power source 331 retracts and drives the bottom plate 332 to move toward the lower opening of the weighing assembly 310 and When returning to the discharge state, the bottom plate 332 is attached to the lower end surface of the tank body 313 . In specific configuration, the third power source 331 can be a cylinder, a structure of servo motor + lead screw, or other structures that can meet the requirements.

There are various structural forms of the load bearing assembly 330. Specifically, as shown in FIG. 6, the load bearing assembly 330 also includes an ear seat 333 and a pin shaft 334. For setting, the ear seat 333 and the tank body 313 are connected as a whole through buckle connection, concave-convex fit, screw connection, integral molding and the like. The lug 333 is integrally connected with the base plate 332 through a pin shaft 334 , and the pin shaft 334 extends in a direction perpendicular to the base plate 332 , and the base plate 332 can rotate around the pin shaft 334 relative to the lug base 333 . When setting specifically, a center hole is provided on the ear seat 333, and the pin shaft 334 is installed in the center hole, and the bottom end of the pin shaft 334 is provided with a base plate 332 and a nut in turn to realize the rotational connection of the base plate 332 and the tank body 313. During the working process, the third power source 331 exerts a force on the bottom plate 332 along the second direction Y, and the bottom plate 332 rotates around the pin shaft 334, so that the bottom plate 332 moves away from or in from the lower opening of the tank body 313 to realize a weighing set The opening and closing of the lower opening of the part 310 realizes the switch between removing materials and loading materials in the tank body 313.

In order to clean the weighing assembly 310, in a preferred embodiment, as shown in FIGS. , air pipe 530 and gas source, one end of the air pipe 510 is inserted in the sampling cavity 130, and is connected with the nozzle 520, and the other end of the air pipe 510 is located in the side material chamber 120, and is connected with one end of the air pipe 530, the air pipe The other end of 530 is connected with the air source, which is located in the hopper 100 . When discharging and cleaning, the gas source is started, and the gas source delivers compressed gas to the gas pipe 530, the compressed gas air guide pipe 510 is ejected from the nozzle 520, and the nozzle 520 ejects airflow toward the weighing assembly 310 to remove the gas on the weighing assembly 310. For puffed matter, the air source is turned off after the air source has been working for a certain period of time, and the cleaning process is completed. In the specific setting, the tail end of the air duct 510 is conical, the nozzle 520 is a corresponding conical structure, and the large end faces the weighing assembly 310, and a ring with a small gap is formed between the air duct 510 and the nozzle 520 cavity, so that the compressed air in the air guide pipe 510 is divergently blown towards the inner wall of the tank body 313, thereby blowing away the bonded material on the inner wall of the tank body 313, and reducing the error in the test process of the bulk density.

In addition, the bulk density online detection device 10 also includes a control module, and the control module is respectively connected to the first power source 220, the weighing assembly 310, the scraping assembly 320, the carrying assembly 330, the extruder, the heating module 400 and the cleaning assembly 500. The module is used to control the start and stop of the first power source 220, the scraper assembly 320, the carrying assembly 330, the heating module 400, and the cleaning assembly 500, the interval between start and stop, the number of test weights, and the interval between two adjacent test weights etc. In the specific setting, the principle of setting the interval between two adjacent test weights is short first and then long. The interval between two adjacent test weights is 5 minutes at the beginning of production. After the production is stable, the interval between two adjacent test density The interval time is 0.5h～1h. Preset information is stored in the memory of the control module. By comparing the received bulk density information with the preset information, the adjustment parameters of the extruder are obtained. These adjustment parameters include the speed of the feeder, steam and water in the conditioner. The amount of addition, the speed of the extruder, the amount of steam and water added in the expansion chamber, etc., the extruder automatically adjusts according to these adjustment parameters. In the specific setting, the preset logic program in the control module is to collect the bulk density at an interval set time, and each online bulk density detection includes discharging state-heating-feeding state automatic sampling-density collection-discharging and cleaning-discharging Material state; in the discharge state, the upper opening and the lower opening of the discharge chamber 110 are connected, the scraping assembly 320 is away from the upper opening of the weighing assembly 310, and the carrying assembly 330 blocks the lower opening of the weighing assembly 310.

In addition, as shown in FIG. 9 , the present invention also provides a method for detecting the volumetric density of the online volumetricity detection device of any one of the above-mentioned technical solutions, including the following steps:

S1, the heating module 400 heats the weighing component 310 to ensure that the weighing component 310 is in a constant temperature state;

S2, the first power source 220 drives the baffle 210 to switch from the discharging state to the retrieving state, and drives the baffle 210 to return to the discharging state after a set time;

S3, the scraping component 320 scrapes off the excess swelling on the opening of the weighing component 310;

S4, the weighing component 310 collects the bulk density information of the expanded product;

S5, the bearing assembly 330 is switched from covering the lower opening of the weighing assembly 310 to exposing the lower opening of the weighing assembly 310, and returning to the lower opening covering the weighing assembly 310 after a set time.

In the above-mentioned bulk density online detection device 10, the puffed product processed by the puffing machine falls into the hopper 100 through the discharge port. When no detection is required, the baffle 210 is in the discharge state. , and the lower opening are connected, and the puffed matter is directly dropped from the discharge chamber 110 to the conveying line for subsequent operation procedures. The carrying assembly 330 blocks the lower opening of the weighing assembly 310. When a detection starts, the heating module 400 works first through step S1 , to heat the weighing assembly 310 to ensure that the weighing assembly 310 is in a constant temperature state, and at this time the puffed matter will not stick to the weighing assembly 310; then through step S2, the first power source 220 acts to drive the baffle 210 to rotate, The baffle plate 210 is switched from the discharge state to the reclaim state, and the puffed matter enters the sampling chamber 130 through the upper opening of the discharge chamber 110, the baffle plate 210, and the upper opening of the sampling chamber 130, and passes through the lower opening of the sampling chamber 130, The upper opening of the weighing assembly 310 falls into the weighing assembly 310, and after the set time, the first power source 220 acts in reverse, and the first power source 220 drives the baffle plate 210 to return to the discharge state, and the automatic sampling ends; Then through step S3, the scraping component 320 acts to scrape off the excess puffed matter on the upper opening of the weighing component 310 and reset after the scraping is completed; then through step S4, the weighing component 310 collects the volumetric information, and the volumetric collection ends ; Finally, through step S5, the bearing assembly 330 moves, the lower opening of the weighing assembly 310 is exposed, and the puffed matter flows from the lower opening of the weighing assembly 310 to the lower opening of the discharge chamber 110 through the lower end of the side material chamber 120, and is completed Reset after discharging, and once the online bulk density detection is completed, the above-mentioned steps S1-S5 are repeated according to the set time length, which can realize the online automatic detection of bulk density in the whole process of puffed product production in a relatively simple and convenient way, reducing human intervention and reducing the workload of operators. Work strength, improve production automation and production efficiency, and the puffed matter will not stick to the weighing component 310 during the entire detection process, so that all the puffed matter participates in weighing, so that the accuracy of the volumetric detection is higher , The accuracy is high, and the product yield of puffed products is improved.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (14)

1. A bulk density online detection device, which cooperates with an extruder and a conveying line, is characterized in that it includes: The hopper has a discharge cavity, a side material cavity, and a sampling cavity. The discharge cavity is located between the discharge port of the extruder and the conveying line, and the upper opening is connected to the sampling cavity. The lower end of the sampling cavity is It communicates with the side material chamber, and the lower end of the side material chamber communicates with the lower opening of the discharge chamber; The reclaiming module includes a baffle and a first power source, the first power source is set on one side of the hopper and is connected to the baffle in transmission, one end of the baffle is rotatably set on the row In the material chamber to realize the switching between the feeding state and the discharging state, in the feeding state, the other end of the baffle is connected to the upper opening of the sampling chamber and is used to introduce puffed matter into the sampling chamber , in the discharge state, the baffle plate opens the discharge chamber to realize puffed matter being discharged from the discharge chamber; Weighing module, including a weighing component, a scraping component and a carrying component arranged in the hopper, and the weighing component is arranged in the side material cavity, and is used to cooperate with the carrying component to accept the sample from the sampling cavity. The puffed matter falling into the lower opening and collect the volumetric information, the scraper assembly is used to scrape off the excess puffed matter from the upper opening of the weighing assembly, and the bearing assembly is used to cover and expose the lower opening of the weighing assembly switch between openings; The heating module is arranged on the weighing assembly, and is used to ensure that the weighing assembly is in a constant temperature state. 2. The bulk density online detection device according to claim 1, wherein the weighing assembly includes a load cell, a fixing seat and a tank body with two ends open, and one end of the fixing seat is installed on the side material The inner wall of the cavity, the other end is supported and connected to the tank body through the load cell, the load cell is used to collect volumetric information, and at least part of the orthographic projection of the lower opening of the sampling cavity falls into the tank In the upper opening of the tank body, the heating module is arranged outside the tank body. 3 . The on-line bulk density detection device according to claim 2 , wherein the heating module is a tubular heater, and the heater is sheathed on the outside of the tank body. 4 . 4 . The on-line bulk density detection device according to claim 2 , wherein the tank body is a cone-shaped structure, and the large end faces the lower opening of the sampling chamber. 5. The on-line bulk density detection device according to claim 2, wherein the weighing assembly further comprises a conical first plate, and one end of the first plate is sheathed and fixed on the tank On the outer side of the upper opening, the other end extends toward the side close to the lower opening of the tank body, and is covered with the load cell. 6. The bulk density online detection device according to claim 1, wherein the first power source includes a first cylinder and an L-shaped rotating shaft, and the cylinder body of the first cylinder is installed on the outer wall of the hopper, One end of the L-shaped rotating shaft is connected to the protruding end of the first cylinder, and the other end extends into the discharge chamber and is connected to the baffle. 7. The bulk density online detection device according to claim 1, wherein the scraper assembly includes a second power source and a scraper, the fixed end of the second power source is installed on the side material chamber and The output end is used to provide the driving force to move in the first direction, the scraper is arranged in the side material chamber and connected to the output end of the second power source, and the lower end is located at the upper opening of the weighing assembly on the plane. 8. The bulk density online detection device according to claim 7, wherein the scraper assembly further comprises a guide rail, the guide rail is installed on the inner wall of the side material chamber and extends along the first direction, The guide rail is slidingly matched with the scraper in the first direction. 9. The bulk density on-line detection device according to claim 1, wherein the carrying assembly includes a third power source and a bottom plate, the fixed end of the third power source is installed on the side material chamber and the output end Used to provide a driving force to move in the second direction, the bottom plate is arranged in the side material chamber and connected to the output end of the third power source, and the upper end surface is located at the plane where the lower opening of the weighing component is located superior. 10. The capacity online detection device according to claim 9, characterized in that, the carrying assembly further comprises an ear seat and a pin shaft, and the ear seat is installed on the outer side of the weighing assembly close to its lower opening, and passes through The pin shaft is rotationally connected with the bottom plate along a direction perpendicular to the bottom plate. 11. The bulk density on-line detection device according to claim 1, further comprising a cleaning component, the cleaning component comprising an air guide tube, a nozzle, an air tube and an air source, one end of the air guide tube is inserted into the sampling cavity and connected to the nozzle, the other end is located in the side material cavity and connected to one end of the gas pipe, the other end of the gas pipe is connected to the gas source, and the gas source is located at the Said hopper. 12. The bulk density online detection device according to claim 1, wherein the hopper comprises a first housing, a second housing and a third housing, wherein: The first housing is a funnel-shaped structure for forming the discharge chamber; The second housing is a cover structure with one end open, and the cover is arranged on the side plate of the first housing, and is used to cooperate with the first housing to form the discharge chamber; The third casing is a funnel-shaped structure, one end communicates with the side plate of the first casing, and the other end is inserted obliquely downward into the second casing to form the sampling chamber. 13. The bulk density online detection device according to claim 12, characterized in that, the hopper further includes multiple sets of adjustment seats and adjustment legs, the adjustment seats are installed on the outside of the second housing, and the adjustment The legs are threadedly connected with the adjustment seat for supporting the second housing. 14. A method for detecting the bulk density of the bulk density online detection device according to any one of claims 1-13, comprising the following steps: S1, the heating module heats the weighing component to ensure that the weighing component is in a constant temperature state; S2, the first power source drives the baffle to switch from the discharging state to the retrieving state, and drives the baffle to return to the discharging state after a set time; S3, the scraping component scrapes off excess puffed matter on the opening of the weighing component; S4, the weighing component collects the bulk density information of the puff; S5, the bearing assembly is switched from covering the lower opening of the weighing assembly to exposing the lower opening of the weighing assembly, and returning to the lower opening covering the weighing assembly after a set time.

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