Online bulk density detection device and bulk density detection method

Abstract

The invention relates to an online bulk density detection device and a bulk density detection method thereof. The online bulk density detection device comprises: a hopper, which has a discharge cavity, a side cavity and a sampling cavity, wherein the upper opening of the discharge cavity is connected to the sampling cavity, the lower end of the sampling cavity is connected to the side cavity, and the lower end of the side cavity is connected to the lower opening of the discharge cavity; a material taking module comprises a first power source and a baffle plate which is transmission-connected thereto, the baffle plate is rotatably arranged in the discharge cavity to realize switching between a material taking state and a material discharging state, in the material taking state, the baffle plate is connected to the upper opening of the sampling cavity to introduce puffed material into the sampling cavity, and in the material discharging state, the baffle plate opens the discharge cavity to discharge the puffed material; a weighing module comprises a weighing component, a scraping component and a bearing component, the weighing component is arranged in the side cavity, the scraping component is used to scrape off excess puffed material, and the bearing component is used to switch between covering and exposing the lower opening of the weighing component; a heating module is arranged in the weighing component to ensure the constant temperature of the weighing component; automatic detection is realized with high detection precision and high accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of feed processing machinery, and in particular to an online bulk density detection device and a bulk density detection method thereof. Background Art

[0002] Extruded feed is widely used as feed pellets due to its excellent properties such as high palatability, easy digestibility, high protein titer, good hygienic quality and low raw material cost, and the extruder used to produce extruded feed is also developing rapidly.

[0003] The extruder is used to shear, mix, knead, extrude and cut the raw materials into pellet feed. The pellet feed is divided into floating feed, medium floating feed, slow sinking feed and fast sinking feed according to its sinking and buoyancy. The sinking and buoyancy of these pellet feeds are closely related to their bulk density, as shown in the following table:

[0004]

[0005] As an important indicator affecting the characteristics of puffed food products, bulk density is currently mainly tested manually. The operator takes the feed from the discharge port and pours it into a measuring cup. Then, the operator scrapes the excess feed on the measuring cup with a tool and weighs it. Finally, the feed is poured back into the conveyor line of the extruder and the residue in the measuring cup is cleaned to complete a bulk density test. Then, the relevant operating parameters are determined according to the results of the bulk density test and manually judged and adjusted. However, manual testing and operation adjustments require higher operating skills, increase labor intensity, reduce detection efficiency, and inevitably lead to human errors. In addition, the production process cannot be effectively tracked, resulting in a low degree of automation of the overall equipment and high production costs.

[0006] In addition, the water content of puffed food is relatively high, and most of the current bulk density equipment cannot realize automatic bulk density detection. Part of the reason is that puffed food with high humidity is easy to stick to the bulk density detector. When the puffed food sticks to the inner wall of the weighing hopper, the weight of the puffed food itself is not actually applied to the weighing sensor. Therefore, even if the weighing hopper appears to be full of puffed food, in fact part of the puffed food does not participate in the weighing, resulting in a large difference in weighing accuracy. Summary of the invention

[0007] Based on this, it is necessary to provide an online bulk density detection device and a bulk density detection method to address the above problems, which can realize online automatic bulk density detection, and the bulk density detection has high precision and accuracy.

[0008] The present invention provides an online bulk density detection device, which cooperates with an extruder and a conveyor line, and comprises:

[0009] A hopper, comprising a discharge cavity, a side cavity and a sampling cavity, wherein 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 connected to the side cavity, and the lower end of the side cavity is connected to the lower opening of the discharge cavity;

[0010] A material taking module, comprising a baffle and a first power source, wherein the first power source is disposed at one side of the hopper and is in driving connection with the baffle, one end of the baffle is rotatably disposed in the discharge cavity to realize switching between a material taking state and a material discharge state, in the material taking state, the other end of the baffle is connected to an upper opening of the sampling cavity and is used to introduce the puffed material into the sampling cavity, and in the material discharge state, the baffle opens the discharge cavity to realize discharge of the puffed material from the discharge cavity;

[0011] The weighing module comprises a weighing component, a scraping component and a bearing component arranged on the hopper, wherein the weighing component is arranged in the side material cavity and is used to cooperate with the bearing component to receive the puffed material falling from the lower opening of the sampling cavity and collect bulk density information, the scraping component is used to scrape off the excess puffed material on the upper opening of the weighing component, and the bearing component is used to switch between covering and exposing the lower opening of the weighing component;

[0012] The heating module is arranged on the weighing component and is used to ensure that the weighing component is in a constant temperature state.

[0013] In the above-mentioned bulk density online detection device, the puffed material processed by the puffing machine falls into the hopper through the drop port. When no detection is required, the baffle is in the discharge state, the baffle is opened, the upper opening and the lower opening of the discharge chamber are connected, and the puffed material falls directly from the discharge chamber to the conveyor line, and the load-bearing component blocks the lower opening of the weighing component. During detection, the heating module works to ensure that the weighing component is in a constant temperature state, and the puffed material will not adhere to the weighing component at this time; the first power source is activated to drive the baffle to rotate, and the baffle is switched from the discharge state to the feeding state, and the puffed material passes through the upper opening of the discharge chamber, the baffle, and the upper opening of the sampling chamber into the sampling chamber, and passes through the lower opening of the sampling chamber and the upper opening of the weighing component and falls into the weighing component, and after the set time, the first power source reverses, the baffle returns to the discharge state, and the automatic sampling ends. The scraping assembly is actuated to scrape off the excess puffed material on the upper opening of the weighing assembly and resets after the scraping is completed, the weighing assembly collects the bulk density information, and the bulk density collection is completed; the carrying assembly is actuated to expose the lower opening of the weighing assembly, the puffed material flows from the lower opening of the weighing assembly through the lower end of the side material cavity to the lower opening of the discharge cavity, and resets after the discharge is completed, and one online bulk density detection is completed. The online bulk density detection is controlled to be repeated according to the set time length, which can realize the online automatic bulk density detection of the whole process of puffed material production, reduce human intervention, reduce the work intensity of operators, improve the degree of automation and production efficiency of production, and the puffed material will not stick to the weighing assembly during the whole detection process, so that all the puffed materials are weighed, thereby making the bulk density detection more precise and accurate.

[0014] In one embodiment, the weighing assembly includes a weighing sensor, a fixing seat, and a tank body with openings at both ends. One end of the fixing seat is installed on the inner wall of the side material cavity, and the other end is supported by the weighing sensor 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 cavity falls into the upper opening of the tank body, and the heating module is arranged on the outside of the tank body.

[0015] In one embodiment, the heating module is a tubular heater, and the heater is sleeved on the outside of the tank.

[0016] In one embodiment, the tank body is a conical structure, and the large end faces the lower opening of the sampling chamber.

[0017] In one embodiment, the weighing assembly further includes a conical first plate body, one end of which is sleeved and fixed on the outer side of the upper opening of the tank body, and the other end of which extends toward a side close to the lower opening of the tank body and covers the weighing sensor.

[0018] In one embodiment, the first power source includes a first cylinder and an L-shaped rotating shaft, 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 cavity and is connected to the baffle.

[0019] In one embodiment, 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 cavity and the output end is used to provide a driving force for moving along a first direction, the scraper is arranged in the side material cavity and connected to the output end of the second power source, and the lower end is located on the plane where the upper opening of the weighing assembly is located.

[0020] In one of the embodiments, the scraper assembly further includes a guide rail, which is installed on the inner wall of the side material cavity and extends along the first direction, and the guide rail and the scraper are slidably matched in the first direction.

[0021] In one embodiment, the bearing assembly includes a third power source and a base 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 along the second direction, the base plate is arranged in the side material cavity 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.

[0022] In one of the embodiments, the bearing assembly further includes an ear seat and a pin shaft. The ear seat is installed on the outer side of the weighing assembly near its lower opening and is rotatably connected to the base plate through the pin shaft in a direction perpendicular to the base plate.

[0023] In one embodiment, the online bulk density detection device also includes a cleaning component, which includes an air duct, a nozzle, an air pipe and an air source. One end of the air duct is inserted into the sampling cavity and connected to the nozzle, and 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.

[0024] In one embodiment, the hopper includes a first shell, a second shell and a third shell, wherein:

[0025] The first shell is a funnel-shaped structure, used to form the discharge cavity;

[0026] The second shell is a cover structure with one end open, and is covered on the side plate of the first shell, and is used to cooperate with the first shell to form the discharge cavity;

[0027] The third shell is a funnel-shaped structure, one end of which is connected to the side plate of the first shell, and the other end of which is inserted obliquely downward into the second shell to form the sampling cavity.

[0028] In one of the embodiments, the hopper further includes a plurality of groups of adjustment seats and adjustment legs, the adjustment seats are installed on the outside of the second shell, and the adjustment legs are threadedly connected to the adjustment seats for supporting the second shell.

[0029] In addition, the present invention also provides a bulk density detection method of the bulk density online detection device described in any of the above technical solutions, comprising the following steps:

[0030] S1, the heating module heats the weighing component to ensure that the weighing component is in a constant temperature state;

[0031] S2, the first power source drives the baffle to switch from the discharging state to the taking state, and drives the baffle to return to the discharging state after a set time;

[0032] S3, the scraping component scrapes away the excess puffed material on the opening of the weighing component;

[0033] S4, a weighing component collects bulk density information of the expanded material;

[0034] S5, the bearing assembly switches from covering the lower opening of the weighing assembly to exposing the lower opening of the weighing assembly, and returns to covering the lower opening of the weighing assembly after a set time.

[0035] In the bulk density detection method of the above-mentioned bulk density online detection device, the puffed material processed by the puffing machine falls into the hopper through the drop port. When no detection is required, the baffle is in the discharge state, the baffle is opened, the upper opening and the lower opening of the discharge chamber are connected, and the puffed material falls directly from the discharge chamber to the conveyor line, and the load-bearing component blocks the lower opening of the weighing component. At the beginning of a detection, first through step S1, the heating module works to heat the weighing component to ensure that the weighing component is in a constant temperature state, at which time the puffed material will not adhere to the weighing component; then through step S2, the first power source is actuated to drive the baffle to rotate, and the baffle is switched from the discharge state to the feeding state, and the puffed material enters the sampling chamber through the upper opening of the discharge chamber, the baffle, and the upper opening of the sampling chamber, and falls into the weighing component through the lower opening of the sampling chamber and the upper opening of the weighing component, and after the set time, the first power source Reverse action, the baffle returns to the discharging state, and the automatic sampling ends; then through step S3, the scraping assembly moves to scrape off the excess puffed material on the upper opening of the weighing assembly and resets after the scraping is completed; then through step S4, the weighing assembly collects the bulk density information, and the bulk density collection ends; finally through step S5, the bearing assembly moves, the lower opening of the weighing assembly is exposed, and the puffed material flows from the lower opening of the weighing assembly through the lower end of the side material cavity to the lower opening of the discharging cavity, and resets after the discharging is completed, and an online bulk density detection ends. According to the set time length, the above steps S1-S5 are controlled to be repeated, which can realize the online automatic bulk density detection of the whole process of puffed material production in a relatively simple and convenient way, reduce human intervention, reduce the work intensity of operators, improve the degree of automation and production efficiency of production, and the puffed material will not stick to the weighing assembly during the whole detection process, so that all puffed materials are involved in weighing, so that the bulk density detection has higher precision and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic structural diagram of an online bulk density detection device provided by the present invention at an angle;

[0037] Figure 2 A schematic diagram of the structure of an online bulk density detection device provided by the present invention at another angle;

[0038] Figure 3 for Figure 1 The front view of the medium bulk density online detection device;

[0039] Figure 4 for Figure 1 Internal schematic diagram of the medium bulk density online detection device during bulk density detection;

[0040] Figure 5 for Figure 1 Internal schematic diagram of the medium bulk density online detection device during discharge and cleaning;

[0041] Figure 6 for Figure 1 A cross-sectional view of a medium bulk density online detection device;

[0042] Figure 7 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;

[0043] Figure 8 for Figure 6 A magnified schematic diagram of position A in the middle;

[0044] Fig. 9 A flow chart of a bulk density detection method for an online bulk density detection device provided by the present invention.

[0045] Reference numerals:

[0046] 10. Bulk density online detection device; X, first direction; Y, second direction; Z, vertical direction;

[0047] 100, hopper; 110, discharge chamber; 120, side chamber; 130, sampling chamber; 140, first housing; 141, first side plate; 142, second side plate; 150, second housing; 151, bottom wall; 152, viewing window; 160, third housing; 170, casters; 180, adjustment seat; 190, adjustment legs;

[0048] 200, material taking module; 210, baffle; 220, first power source; 221, first cylinder; 222, L-shaped rotating shaft; 230, support;

[0049] 300, weighing module; 310, weighing assembly; 311, weighing sensor; 312, fixing seat; 313, tank body; 314, first plate body; 320, scraping assembly; 321, second power source; 322, scraper; 323, guide rail; 330, bearing assembly; 331, third power source; 332, bottom plate; 333, ear seat; 334, pin shaft;

[0050] 400. Heating module;

[0051] 500, spray assembly; 510, air guide tube; 520, nozzle; 530, air pipe. DETAILED DESCRIPTION

[0052] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a 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. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0057] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0058] The technical solution provided by the embodiments of the present invention is described below in conjunction with the accompanying drawings.

[0059] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, the present invention provides an online bulk density detection device 10, which cooperates with an extruder and a conveyor line to realize online automatic detection of bulk density of expanded materials and automatic adjustment of operating parameters of the extruder during the production operation of the extruder. In specific settings, the online bulk density detection device 10 is installed relative to the extruder and the conveyor line. The online bulk density detection device 10 includes a hopper 100, a material taking module 200, a weighing module 300 and a heating module 400, wherein:

[0060] The hopper 100 has a discharge chamber 110, a side chamber 120, and a sampling chamber 130. The discharge chamber 110 is located between the discharge port of the extruder and the conveyor line, and the upper opening of the discharge chamber 110 is located below the discharge port of the extruder, and the lower opening of the discharge chamber 110 is located above the conveyor line. In the 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 assembled together after being prepared separately; the first shell 140 is a funnel-shaped structure for forming the discharge chamber 110, and in order to facilitate movement, a plurality of casters 170 are provided at the bottom of the first shell 140; the second shell 150 is a cover structure with an opening at one end, and the second shell 150 is covered on the side plate of the first shell 140, and forms the side chamber 120 with the first side plate 141 of the first shell 140.

[0061] The lower end of the side material cavity 120 is connected to the lower opening of the discharge cavity 110, the upper opening of the sampling cavity 130 is connected to the upper opening of the discharge cavity 110, and the lower end of the sampling cavity 130 is connected to the side material cavity 120. In the specific setting, the side material cavity 120 and the discharge cavity 110 are arranged side by side, and the third shell 160 is a funnel-shaped structure, and one end is covered at the upper end opening of the first side plate 141, and the other end extends obliquely downward to form the sampling cavity 130; the lower opening of the side material cavity 120 opens at the lower end of the first side plate 141. In order to facilitate the falling of the puffed material in the side material cavity 120, the bottom wall 151 of the second shell 150 extends obliquely downward, and the end away from the first side plate 141 is located near the first side plate 141. Above the end; in order to facilitate supporting the hopper 100 and ensure the stability and levelness of the hopper 100, a plurality of adjustment seats 180 and a plurality of adjustment legs 190 are evenly arranged on the outer side of the second shell 150, the adjustment seats 180 are installed on the outer wall of the second shell 150, the adjustment legs 190 are locked in the threaded holes of the adjustment seats 180, and are locked by nuts after the adjustment legs 190 are adjusted to an appropriate height; in order to facilitate observing the working conditions, a window 152 is also arranged on the second shell 150.

[0062] The material picking module 200 includes a baffle 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 transmission-connected to the baffle 210. One end of the baffle 210 is arranged in the discharge chamber 110, and the baffle 210 can rotate in the discharge chamber 110. The baffle 210 has a discharge state and a pick-up state, and the baffle 210 rotates and switches between the discharge state and the pick-up state. In the discharging state, the baffle 210 is opened, and the existence of the baffle 210 will not block the puffed material from falling in the discharging chamber 110. At this time, the upper opening and the lower opening of the discharging chamber 110 are connected; in the collecting state, the other end of the baffle 210 is connected to the upper opening of the sampling chamber 130, and the baffle 210 is used to introduce the puffed material into the sampling chamber 130. In the specific setting, the baffle 210 can separate the upper opening of the sampling chamber 130 and the lower opening of the discharging chamber 110 in the collecting state. At this time, the upper opening and the lower opening of the discharging chamber 110 are not connected, and the puffed material enters the sampling chamber 130.

[0063] The weighing module 300 includes a weighing component 310, a scraping component 320 and a bearing component 330. The weighing component 310 is installed inside the side material cavity 120. The bearing component 330 and the scraping component 320 are respectively installed on the hopper 100. The bearing component 330 is used to switch between covering the lower opening of the weighing component 310 and exposing the lower opening of the weighing component 310. When the carrying component 330 switches to cover the lower opening of the weighing component 310, the weighing component 310 and the carrying component 330 cooperate to receive the puffed material falling from the lower opening of the sampling chamber 130, and the scraping component 320 is used to scrape off the excess puffed material on the upper opening of the weighing component 310. At this time, the weighing component 310 is also used to collect the bulk density information of the puffed material. When the carrying component 330 switches to expose the lower opening of the weighing component 310, the puffed material in the weighing component 310 falls into the side material chamber 120, flows into the discharge chamber 110, and finally converges to the conveyor line.

[0064] The heating module 400 is disposed on the weighing component 310 , and the heating module 400 is used to ensure that the weighing component 310 is in a constant temperature state. When the weighing component 310 is in a constant temperature state, the expanded material will not adhere to the weighing component 310 .

[0065] In the above-mentioned bulk density online detection device 10, the puffed material processed by the puffing machine falls into the hopper 100 through the drop port. When no detection is required, the baffle 210 is in a discharge state. The baffle 210 is opened, and the upper opening and the lower opening of the discharge chamber 110 are connected. The puffed material falls directly from the discharge chamber 110 to the conveyor line for subsequent operation processes. The bearing component 330 blocks the lower opening of the weighing component 310. During the detection, the heating module 400 works to ensure that the weighing component 310 is in a constant temperature state. At this time, the expanded material will not adhere to the weighing assembly 310; the first power source 220 is activated to drive the baffle 210 to rotate, and the baffle 210 is switched from the discharge state to the feeding state, and the expanded material passes through the upper opening of the discharge cavity 110, the baffle 210, and the upper opening of the sampling cavity 130 into the sampling cavity 130, and passes through the lower opening of the sampling cavity 130 and the upper opening of the weighing assembly 310 and falls into the weighing assembly 310, and after the set time, the first power source 220 reverses and the first power source 220 is turned on. The source 220 drives the baffle 210 to return to the discharging state, and the automatic sampling is completed; the scraping component 320 is actuated to scrape off the excess puffed material on the upper opening of the weighing component 310 and 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 is actuated, the lower opening of the weighing component 310 is exposed, the puffed material flows from the lower opening of the weighing component 310 through the lower end of the side material cavity 120 to the lower opening of the discharging cavity 110, and resets after the discharging is completed, and one online bulk density detection is completed. The online bulk density detection is controlled to be repeated according to the set time, which can realize the online automatic detection of bulk density in the whole process of puffed material production, reduce human intervention, reduce the work intensity of operators, improve the degree of automation and production efficiency of production, and the puffed material will not stick to the weighing component 310 during the whole detection process, so that all puffed materials are weighed, so that the precision and accuracy of bulk density detection are higher, and the product yield of puffed material is improved.

[0066] The first power source 220 has various structural forms. In a preferred embodiment, Figure 1 , Figure 3 , Figure 4 as well as Figure 5As shown, the first power source 220 includes a first cylinder 221 and an L-shaped shaft 222. The cylinder body of the first cylinder 221 is installed on the outer wall of the hopper 100 through a support 230. One end of the L-shaped shaft 222 is connected to the protruding end of the first cylinder 221 by means of snap connection, concave-convex fit, threaded connection, etc., and the other end of the L-shaped shaft 222 extends into the discharge cavity 110 and is connected to the baffle 210 by means of snap connection, concave-convex fit, threaded connection, etc. In the specific setting, the hopper 100 has a first direction X and a second direction Y. The first direction X is the arrangement direction of the side cavity 120 and the discharge cavity 110. The second direction Y is perpendicular to the first direction X and the 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 shaft 222 passes through the through hole on the second side plate 142 along the second direction Y and can rotate in the through hole.

[0067] In the above-mentioned bulk density online detection device 10, the first cylinder 221 moves forward, the extended end of the first cylinder 221 extends, and drives the L-shaped rotating shaft 222 to rotate forward, and the L-shaped rotating shaft 222 drives the baffle 210 to rotate together, and the baffle 210 leaves the discharging state and switches to the material taking state to control the flow direction of the expanded material from the discharging chamber 110 to the sampling chamber 130, so as to realize automatic sampling. After the automatic sampling is completed, the first cylinder 221 moves in the reverse direction, the extended end of the first cylinder 221 retracts, and drives the L-shaped rotating shaft 222 to rotate in the reverse direction, and the L-shaped rotating shaft 222 drives the baffle 210 to rotate together, and the baffle 210 returns from the material taking state to the discharging state to control the flow direction of the expanded material from the sampling chamber 130 to the discharging chamber 110, so as to continue to discharge the expanded material to the conveyor line. In specific configuration, the structure of the first power source 220 is not limited to the above structure, and may also be other structures that can meet the requirements. For example, the first power source 220 is a servo motor, and the output shaft of the servo motor extends along the second direction Y.

[0068] The weighing assembly 310 has various structural forms. In a preferred embodiment, Figure 4 , Figure 5 as well as Figure 6As shown, the weighing assembly 310 includes a weighing sensor 311, a fixing seat 312 and a tank body 313. One end of the fixing seat 312 is installed on the inner wall of the side material cavity 120 by means of snap connection, concave-convex fit, threaded connection, etc., and the other end of the fixing seat 312 is connected to the tank body 313 through the weighing sensor 311. The connection between the fixing seat 312 and the weighing sensor 311, and between the weighing sensor 311 and the tank body 313 can be snap connection, concave-convex fit, or threaded connection. The weighing sensor 311 supports the tank body 313 so that the tank body 313 is suspended in the side material cavity 120, and the weighing sensor 311 is used to collect bulk density information. The two ends of the tank body 313 are open, and at least part of the positive 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 on the outside of the tank body 313. In the specific setting, the lower opening of the sampling chamber 130 extends along the vertical direction Z to prevent the puffed material from splashing. The lower opening of the sampling chamber 130 is arranged opposite to the upper opening of the tank body 313, and the area of ​​the lower opening of the sampling chamber 130 is smaller than the area of ​​the upper opening of the tank body 313, so that the puffed material can fall into the tank body 313.

[0069] In the above-mentioned bulk density online detection device 10, during automatic sampling and bulk density collection, the bearing assembly 330 blocks the lower opening of the weighing assembly 310, and the puffed material passes through the lower opening of the sampling cavity 130 and the upper opening of the tank body 313 and falls into the tank body 313. After the automatic sampling is completed, the scraping assembly 320 scrapes off the excess puffed material on the upper opening of the tank body 313, and the weighing sensor 311 collects bulk density information. The heating module 400 heats the tank body 313 to prevent the puffed material from sticking to the inner wall of the tank body 313. The weight of the puffed material itself is applied to the weighing sensor 311, and all the puffed material participates in the weighing, thereby improving the weighing accuracy. Since the mass of each liter of puffed material is only a few hundred grams, and only the weighing assembly 310 and the puffed material are weighed and measured, the total mass required for weighing is small, and the accuracy of bulk density detection is relatively high.

[0070] In order to further improve the accuracy of bulk density detection, specifically, Figure 4 , Figure 5 as well as Figure 6 As shown, the heating module 400 is a tubular heater, and the heater is sleeved on the outer side of the tank body 313. In a specific configuration, the heater 420 can be an electric heating plate, an electric heating tube, etc. During the detection, the heater 420 is started, and the heat generated by the heater 420 causes the temperature of the tank body 313 to rise and maintain a certain temperature, thereby reducing or avoiding the adhesion of the wet puffed material to the inside of the tank body 313, especially reducing the adhesion of small-particle wet puffed material, thereby reducing the error of bulk density detection.

[0071] In order to further improve the accuracy of bulk density detection, specifically, Figure 4 , Figure 5 , Figure 6 as well as Figure 7 As shown, the weighing assembly 310 also includes a conical first plate 314, which is sleeved on the outer side of the opening on the tank body 313. One end of the first plate 314 is connected to the outer wall of the opening on the tank body 313 by means of snap connection, concave-convex fitting, threaded connection, integral molding, etc. The other end of the first plate 314 extends toward the side close to the lower opening of the tank body 313, and covers the weighing sensor 311. On the one hand, it can prevent the puffed material from accumulating at the support of the weighing sensor 311 and reduce the error of bulk density detection. On the other hand, it can also make the splashed puffed material slide along the first plate 314 to avoid the introduction of the first plate 314 causing adverse effects on the bulk density detection.

[0072] In order to further improve the accuracy of bulk density detection, specifically, Figure 7 As shown, the tank body 313 is a conical structure, and the tank body 313 is placed in a small upper part and a large lower part, with the large end of the tank body 313 facing 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 material accumulates, and improve the stability of the structure of the weighing assembly 310; on the other hand, it can also reduce or avoid the adhesion of the wet puffed material to the inside of the tank body 313, especially it can reduce the adhesion of small particles of wet puffed material, thereby reducing the error of bulk density detection.

[0073] The scraper assembly 320 has various structural forms. In a preferred embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 5 as well as Figure 6 As shown, 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 cavity 120 by means of snap connection, concave-convex fitting, threaded connection, etc., and the output end of the second power source 321 is used to provide a driving force for moving along the first direction X. The scraper 322 is arranged in the side material cavity 120, and the scraper 322 and the output end of the second power source 321 are connected as a whole by means of snap connection, concave-convex fitting, threaded connection, etc. The lower end of the scraper 322 is located on the plane where the upper opening of the weighing assembly 310 is located. In the specific setting, 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 on the reciprocating stroke of the lower end of the scraper 322.

[0074] In the above-mentioned online bulk density detection device 10, after the automatic sampling is completed, the second power source 321 moves forward, the output end of the second power source 321 extends and drives the scraper 322 to move along the first direction X toward the upper opening of the weighing component 310, and the scraper 322 scrapes off the excess puffed material on the upper opening of the tank body 313 to ensure that the volume of the puffed material is the same for each bulk density measurement; the second power source 321 moves reversely, the output end of the second power source 321 retracts and drives the scraper 322 to leave the upper opening of the weighing component 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 plate of the side material cavity 120 along the first direction X by snap connection, concave-convex matching, threaded connection, etc. One end of the scraper 322 is inserted into the slide groove of the guide rail 323, and the scraper 322 can slide in the guide rail 323 along the first direction X; the second power source 321 can be a cylinder, or a servo motor + screw structure, or other structures that can meet the movement requirements.

[0075] The structure of the bearing assembly 330 has various forms. In a preferred embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 As shown, 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 cavity 120 by means of snap connection, concave-convex matching, threaded connection, etc., and the output end of the second power source 321 is used to provide a driving force for moving along the second direction Y. The bottom plate 332 is arranged in the side material cavity 120, and the bottom plate 332 and the output end of the third power source 331 are connected as a whole by means of snap connection, concave-convex matching, threaded connection, etc. In a specific setting, one end of the bottom plate 332 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 bottom plate 332 is located on the plane where the lower opening of the weighing assembly 310 is located. In a specific setting, the surface where the upper end of the bottom 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 reciprocating stroke of the upper end of the bottom plate 332.

[0076] In the above-mentioned bulk density online detection device 10, after the bulk density collection is completed, the third power source 331 moves forward, the output end of the third power source 331 extends 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 expanded material is discharged under the action of gravity; the third power source 331 moves reversely, 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 reset to the discharge state when the bottom plate 332 is attached to the lower end surface of the tank body 313. In specific settings, the third power source 331 can be a cylinder, a servo motor + screw structure, or other structures that can meet the requirements.

[0077] The structure of the bearing assembly 330 has various forms, specifically, Figure 6 As shown, the bearing assembly 330 also includes an ear seat 333 and a pin 334. The ear seat 333 is installed on the outer side of the weighing assembly 310 near its lower opening. In a specific setting, the ear seat 333 and the tank body 313 are connected as a whole by means of snap connection, concave-convex matching, threaded connection, integrated molding, etc. The ear seat 333 is connected as a whole with the bottom plate 332 through the pin 334, and the pin 334 extends in a direction perpendicular to the bottom plate 332, and the bottom plate 332 can rotate around the pin 334 relative to the ear seat 333. In a specific setting, a center hole is opened on the ear seat 333, and the pin 334 is installed in the center hole, and the bottom end of the pin 334 is sequentially provided with the bottom plate 332 and a nut to realize the rotation connection between the bottom plate 332 and the tank body 313. During operation, the third power source 331 applies force to 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 into the lower opening of the tank body 313, thereby opening and closing the lower opening of the weighing assembly 310 and switching between discharging and loading materials in the tank body 313.

[0078] In order to clean the weighing assembly 310, in a preferred embodiment, Figure 3 , Figure 4 , Figure 5 as well as Figure 8As shown, the bulk density online detection device 10 also includes a cleaning component 500, which includes an air guide tube 510, a nozzle 520, an air pipe 530 and an air source. One end of the air guide tube 510 is inserted into the sampling cavity 130 and connected to the nozzle 520. The other end of the air guide tube 510 is located in the side material cavity 120 and connected to one end of the air pipe 530. The other end of the air pipe 530 is connected to the air source, which is provided in the hopper 100. When discharging and cleaning, the air source is started, and the air source delivers compressed gas to the air pipe 530. The compressed gas is ejected from the nozzle 520 through the air guide tube 510, and the nozzle 520 ejects air flow toward the weighing component 310 to remove the puffed material on the weighing component 310. After the air source works for a certain period of time, the air source is turned off, and the cleaning process is completed. In the specific setting, the tail end of the air guide tube 510 is tapered, the nozzle 520 is a corresponding conical structure, and the large end faces the weighing assembly 310. A ring cavity with a small gap is formed between the air guide tube 510 and the nozzle 520, so that the compressed air in the air guide tube 510 is blown toward the inner wall of the tank body 313 in a divergent manner, thereby blowing away the material adhered to the inner wall of the tank body 313 and reducing the error in the bulk density detection process.

[0079] In addition, the online bulk density detection device 10 also includes a control module, which is respectively communicated with the first power source 220, the weighing component 310, the scraper component 320, the load-bearing component 330, the expander, the heating module 400 and the cleaning component 500. The control module is used to control the start and stop of the first power source 220, the scraper component 320, the load-bearing component 330, the heating module 400 and the cleaning component 500, the start and stop interval time, the number of bulk density detections, the interval time between two adjacent bulk density detections, etc. In the specific setting, the interval time between two adjacent bulk density detections is set in principle as short first and long later. When production starts, the interval time between two adjacent bulk density detections is 5 minutes. After production stabilizes, the interval time between two adjacent bulk density detections is 0.5h to 1h. The memory of the control module stores preset information. By comparing the received bulk density information with the preset information, the adjustment parameters of the extruder are obtained. These adjustment parameters include the rotation speed of the feeder, the amount of steam and water added in the conditioner, the rotation speed of the extruder, the amount of steam and water added in the extruding chamber, etc. The extruder is automatically adjusted according to these adjustment parameters. In specific settings, the preset logic program in the control module is to collect bulk density once at an interval setting time. Each online bulk density detection includes discharge state-heating-automatic sampling of material taking state-bulk density collection-discharge and cleaning-discharge state; in the discharge state, the upper opening and lower opening of the discharge chamber 110 are connected, the scraper assembly 320 is away from the upper opening of the weighing assembly 310, and the bearing assembly 330 blocks the lower opening of the weighing assembly 310.

[0080] In addition, if Fig. 9As shown, the present invention also provides a bulk density detection method of the bulk density online detection device of any of the above technical solutions, comprising the following steps:

[0081] S1, the heating module 400 heats the weighing component 310 to ensure that the weighing component 310 is in a constant temperature state;

[0082] S2, the first power source 220 drives the baffle 210 to switch from the discharging state to the taking state, and drives the baffle 210 to return to the discharging state after a set time;

[0083] S3, the scraping component 320 scrapes off the excess expanded material on the opening of the weighing component 310;

[0084] S4, the weighing component 310 collects bulk density information of the expanded material;

[0085] S5, the bearing assembly 330 switches from covering the lower opening of the weighing assembly 310 to exposing the lower opening of the weighing assembly 310, and returns to covering the lower opening of the weighing assembly 310 after a set time.

[0086] In the above-mentioned bulk density online detection device 10, the puffed material processed by the puffing machine falls into the hopper 100 through the drop opening. When no detection is required, the baffle 210 is in a discharge state, the baffle 210 is opened, the upper opening and the lower opening of the discharge chamber 110 are connected, and the puffed material falls directly from the discharge chamber 110 to the conveyor line for subsequent operation processes. The bearing component 330 blocks the lower opening of the weighing component 310. When a detection starts, first, through step S1, the heating module 400 works to heat the weighing component 310 to ensure that the weighing component 310 is in a state of being heated. In a constant temperature state, the expanded material will not adhere to the weighing assembly 310 at this time; then, through step S2, the first power source 220 is activated to drive the baffle 210 to rotate, and the baffle 210 is switched from the discharge state to the feeding state, and the expanded material passes through the upper opening of the discharge cavity 110, the baffle 210, and the upper opening of the sampling cavity 130 into the sampling cavity 130, and passes through the lower opening of the sampling cavity 130 and the upper opening of the weighing assembly 310 and falls into the weighing assembly 310, and after the set time, the first power source 220 reverses and the first power source 2 20 drives the baffle 210 to return to the discharging state, and the automatic sampling ends; then, in step S3, the scraper assembly 320 is activated to scrape off the excess puffed matter on the upper opening of the weighing assembly 310 and reset after the scraping is completed; then, in step S4, the weighing assembly 310 collects bulk density information, and bulk density collection ends; finally, in step S5, the bearing assembly 330 is activated, the lower opening of the weighing assembly 310 is exposed, and the puffed matter flows from the lower opening of the weighing assembly 310 through the lower end of the side material cavity 120 to the lower opening of the discharging cavity 110, and After the discharge is completed, the device is reset, and one online bulk density detection is completed. The above steps S1-S5 are controlled to be repeated according to the set time, which can realize the online automatic bulk density detection of the whole process of puffed food production in a simple and convenient way, reduce human intervention, reduce the workload of operators, improve the degree of production automation and production efficiency, and the puffed food will not stick to the weighing component 310 during the whole detection process, so that all the puffed food can participate in the weighing, thereby making the bulk density detection more precise and accurate, and improving the product yield of the puffed food.

[0087] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made 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 of the present invention shall be subject to the attached claims.

Claims

1. An online bulk density detection device, which cooperates with an extruder and a conveyor line, is characterized in that: include: A hopper, comprising a discharge cavity, a side cavity and a sampling cavity, wherein 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 connected to the side cavity, and the lower end of the side cavity is connected to the lower opening of the discharge cavity; A material taking module, comprising a baffle and a first power source, wherein the first power source is disposed at one side of the hopper and is in driving connection with the baffle, one end of the baffle is rotatably disposed in the discharge cavity to realize switching between a material taking state and a material discharge state, in the material taking state, the other end of the baffle is connected to an upper opening of the sampling cavity and is used to introduce the puffed material into the sampling cavity, and in the material discharge state, the baffle opens the discharge cavity to realize discharge of the puffed material from the discharge cavity; The weighing module comprises a weighing component, a scraping component and a bearing component arranged on the hopper, wherein the weighing component is arranged in the side material cavity and is used to cooperate with the bearing component to receive the puffed material falling from the lower opening of the sampling cavity and collect bulk density information, the scraping component is used to scrape off the excess puffed material on the upper opening of the weighing component, and the bearing component is used to switch between covering and exposing the lower opening of the weighing component; A heating module, arranged on the weighing component, for ensuring that the weighing component is in a constant temperature state; The weighing assembly includes a weighing sensor, a fixing seat and a tank body with openings at both ends, one end of the fixing seat is mounted on the inner wall of the side material cavity, and the other end is supported and connected to the tank body through the weighing sensor, the weighing sensor is used to collect bulk density information, at least part of the orthographic projection of the lower opening of the sampling cavity falls into the upper opening of the tank body, and the heating module is arranged on the outside of the tank body; 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 cavity and the output end is used to provide a driving force for moving along a first direction. The scraper is arranged in the side material cavity and connected to the output end of the second power source, and the lower end is located on the plane where the upper opening of the weighing assembly is located.

2. The online bulk density detection device according to claim 1, characterized in that: The heating module is a tubular heater, and the heater is sleeved on the outer side of the tank body.

3. The online bulk density detection device according to claim 1, characterized in that: The tank body is a conical structure, and the large end faces the lower opening of the sampling cavity.

4. The online bulk density detection device according to claim 1, characterized in that: The weighing assembly also includes a conical first plate body, one end of which is sleeved and fixed on the outer side of the upper opening of the tank body, and the other end of which extends toward a side close to the lower opening of the tank body and covers the weighing sensor.

5. The online bulk density detection device according to claim 1, characterized in that: The first power source includes a first cylinder and an L-shaped rotating shaft. 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 cavity and is connected to the baffle.

6. The online bulk density detection device according to claim 1, characterized in that: The scraper assembly further includes a guide rail, which is installed on the inner wall of the side material cavity and extends along the first direction. The guide rail and the scraper are slidably matched in the first direction.

7. The online bulk density detection device according to claim 1, characterized in that: The bearing assembly includes a third power source and a base 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 along the second direction, the base plate is arranged in the side material cavity 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.

8. The online bulk density detection device according to claim 7, characterized in that: The bearing assembly further comprises 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 rotatably connected to the bottom plate through the pin shaft in a direction perpendicular to the bottom plate.

9. The online bulk density detection device according to claim 1, characterized in that: It also includes a cleaning component, which includes an air guide tube, a nozzle, an air pipe and an air source. One end of the air guide tube is inserted into the sampling cavity and connected to the nozzle, and 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.

10. The online bulk density detection device according to claim 1, characterized in that: The hopper comprises a first shell, a second shell and a third shell, wherein: The first shell is a funnel-shaped structure, used to form the discharge cavity; The second shell is a cover structure with one end open, and is covered on the side plate of the first shell, and is used to cooperate with the first shell to form the discharge cavity; The third shell is a funnel-shaped structure, one end of which is connected to the side plate of the first shell, and the other end of which is inserted obliquely downward into the second shell to form the sampling cavity.

11. The online bulk density detection device according to claim 10, characterized in that: The hopper further comprises a plurality of groups of adjustment seats and adjustment legs, wherein the adjustment seats are mounted on the outside of the second shell, and the adjustment legs are threadedly connected to the adjustment seats for supporting the second shell.

12. A bulk density detection method of the bulk density online detection device according to any one of claims 1 to 11, characterized in that: The following steps are involved: 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 taking state, and drives the baffle to return to the discharging state after a set time; S3, the scraping component scrapes away the excess puffed material on the opening of the weighing component; S4, a weighing component collects bulk density information of the expanded material; S5, the bearing assembly switches from covering the lower opening of the weighing assembly to exposing the lower opening of the weighing assembly, and returns to covering the lower opening of the weighing assembly after a set time.

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