Articulated bulk material weighing device
Through the design of the articulated bulk material weighing device, the problem of difficulty in accurately measuring the output of a single cigarette unit is solved, and high-precision dry bulk material detection and stable measurement results are achieved, supporting the refined production management of the cigarette factory.
Patent Information
- Application Number
- CN202510769042.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-10
- Publication Date
- 2025-08-15
AI Technical Summary
The prior art cannot accurately measure the dry bulk material output of a single cigarette unit, resulting in difficulty in making production optimization and equipment maintenance decisions.
A hinged bulk material weighing device is designed, and three weighing mechanisms are hinged in a positive triangle distribution and hinged in the shell. Combined with flexible connection and code calibration mechanism, we ensure weighing accuracy and stability, and realize the precise detection of bulk material through negative pressure suction and screening plate screening.
It realizes high-precision metering of dry-spread materials for a single cigarette unit, improves the anti-load performance of the weighing device and the reliability of the measurement results, and supports refined production management.
Smart Images
Figure CN120489304A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of weighing technology, and more specifically, relates to an articulated bulk material weighing device. Background Art
[0002] A weighing device is a special device used to measure the mass of an object. Its core function is to convert the weight of a material into quantifiable and recordable data through physical or electronic means, providing an accurate measurement basis for production, logistics, trade and other links.
[0003] Conventional technologies often use conveying devices to transfer dry bulk materials to improve efficiency, reduce labor intensity, and reduce environmental pollution. The final material output is then aggregated and weighed. This weighing scheme only measures the output of all units as a whole, failing to distinguish between individual units. This makes it difficult to accurately identify inefficient units or faulty equipment during production operations, hindering production optimization and equipment maintenance decisions and potentially masking potential capacity bottlenecks.
[0004] Taking cigarette factories as an example, the current model adopted by most cigarette factories is mainly as follows: the finished tobacco produced in the tobacco-making workshop is sent to the long belt conveyor through the tobacco storage cabinet, and then is sent to the tobacco feeder after being measured by the electronic belt scale. Each tobacco feeder uses 4-6 air ducts to send the tobacco to each cigarette making unit in the rolling and packaging workshop. This method can only be used for the overall tobacco consumption assessment of multiple cigarette making units, and cannot be used to assess a single cigarette making unit, so it is urgently in need of improvement. Summary of the Invention
[0005] In response to the defects or improvement needs of the existing technology, the present application provides an articulated bulk material weighing device, which is designed to accurately measure the output of a single unit.
[0006] The present application provides an articulated bulk material weighing device, which specifically includes: a housing, a weighing cavity, three weighing mechanisms and a calibration mechanism, wherein: The weighing cavity is hingedly mounted in the shell through three weighing mechanisms, and the three weighing mechanisms are distributed in an equilateral triangle on the top of the shell to be used together for weighing the weighing cavity; A sieve plate is provided in the weighing cavity, which divides the inner cavity of the weighing cavity into a pressure regulating cavity and a storage cavity. The pressure regulating cavity is flexibly connected to a pressure regulating pipe for connecting to a pressure regulating gas circuit, and the storage cavity is flexibly connected to a feeding pipe for receiving bulk materials. The bottom of the storage cavity is provided with a switchable discharge structure for feeding materials to an external unit; The calibration mechanism is arranged at the upper end of the shell, and is used to apply a load to the weighing cavity to calibrate the weighing accuracy of the weighing mechanism.
[0007] As a further preferred embodiment, the weighing mechanism includes a shear beam weighing sensor, a connecting member and a telescopically adjustable suspension member, wherein: The shear beam type weighing sensor is connected to the shell, and the detection end of the shear beam type weighing sensor is hinged to the upper end of the suspension through a connecting piece, and the rotation axis at the hinge is parallel to the feeding direction of the weighing cavity, and the weighing cavity is suspended at the lower end of the suspension.
[0008] As a further preferred embodiment, the calibration mechanism includes a linear power member and a weight, wherein the linear power member is arranged at the upper end of the shell, and the linear power member is used to drive the weight to move up and down so that the weight applies a load to the top of the weighing cavity, or separates the weight from the weighing cavity.
[0009] As a further preferred embodiment, a through hole that tapers from bottom to top is provided in the weight, and the calibration mechanism further comprises a connecting rod, which comprises a vertical section and a horizontal section, wherein: The vertical section is connected to the driving end of the linear power member; The horizontal section is located in the through hole, and the length of the horizontal section is greater than the diameter of the upper opening of the through hole and smaller than the diameter of the lower opening of the through hole.
[0010] As a further preferred embodiment, the weighing cavity is provided with a breathing valve capable of responding to the pressure state in the weighing cavity, wherein: When the inner cavity of the weighing chamber is in a non-negative pressure state, the breathing valve is opened to connect the inner cavity of the weighing chamber to the atmosphere; When the inner cavity of the weighing chamber is in a negative pressure state, the breathing valve is closed.
[0011] As a further preference, a filtering structure is provided on the inner side of the breathing valve.
[0012] As a further preference, the weighing device further includes a purging mechanism for purging the inner cavity of the weighing cavity.
[0013] As further preferred, the purge mechanism includes: A first purge assembly is arranged in the pressure regulating chamber and has a purge port facing the sieve plate; A second purge assembly is provided at the connection point between the pressure regulating chamber and the pressure regulating pipe; A third purge assembly is provided at the connection point between the storage chamber and the feed pipe.
[0014] As a further preference, a limiting mechanism for limiting the range of movement of the weighing cavity is provided in the housing.
[0015] As a further preferred embodiment, the housing includes a main housing, a wire feed port silo and an air delivery port silo, and the wire feed port silo and the air delivery port silo are respectively arranged at opposite ends of the main housing, wherein: The weighing cavity is connected to the wire feed port silo through a hose, and the wire feed port silo is connected to the feed pipe; The weighing cavity is connected to the air delivery port silo through another hose, and the air delivery port silo is connected to the pressure regulating pipe.
[0016] In general, the above technical solutions conceived by this application have the following technical advantages compared with the existing technologies: The weighing chamber in this device is articulated and suspended within the housing via three weighing mechanisms. Their planar equilateral triangle arrangement ensures the upper portion of the weighing chamber is level, ensuring balance when suspended and ensuring consistency in the zero position of each sensor, thereby improving weighing accuracy. Furthermore, the flexible connection design eliminates inaccuracies caused by rigid connections, enhancing the reliability of the weighing signal and thus improving the accuracy and stability of the weighing device. A calibration mechanism provides real-time calibration, preventing measurement errors caused by mechanical vibration and tare weight fluctuations.
[0017] Under this new weighing structure and layout, the weighing device can be well set in the unit through the shell, and is connected in series with the unit through the feed pipe and the discharge structure. The negative pressure suction of bulk materials and the screening effect of the screen plate ensure the smooth transportation of bulk materials, so that the device can accurately detect the bulk materials produced by the unit. The device has simple calibration, strong anti-eccentricity, high weighing accuracy, and extremely reliable measurement results. It is particularly suitable for the measurement and transportation of dry bulk materials in a single cigarette unit. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 Schematic diagram of the overall structure of the articulated bulk material weighing device provided in an embodiment of the present application; Figure 2 This is a partial structural diagram of an articulated bulk material weighing device provided in an embodiment of the present application; Figure 3 Schematic diagram of the structure of the weighing cavity provided in the embodiment of the present application; Figure 4 is a side view of the weighing cavity provided in an embodiment of the present application; Figure 5 is a schematic diagram of a weighing mechanism provided in an embodiment of the present application; Figure 6 Schematic diagram of the calibration mechanism provided in an embodiment of the present application; Figure 7 is a cross-sectional view of a breathing valve provided in an embodiment of the present application; Figure 8 This is a schematic diagram of the structure of the breathing valve provided in an embodiment of the present application; Figure 9This is a structural diagram of the air delivery port silo and the pressure regulating pipe provided in an embodiment of the present application; Figure 10 This is a structural diagram of the wire feed port hopper and feed pipe provided in an embodiment of the present application; Figure 11 It is a structural schematic diagram of the shell provided in an embodiment of the present application.
[0019] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein: 1. Housing; 1-1. Main housing; 1-2. Wire feed port hopper; 1-3. Air feed port hopper; 1-4. Dust-proof soft leather; 2. Weighing chamber; 2-1. Pressure regulating chamber; 2-2. Storage chamber; 2-3. Discharge mechanism; 2-3a. Cylinder; 2-3b. Flap panel; 3. Weighing mechanism; 3-1. Shear beam load cell; 3-2. Connector; 3-3. Suspension member; 3-3a. Threaded rod; 3-3b. Threaded sleeve; 4. Calibration mechanism; 4-1. Linear actuator; 4-2. Weights ; 4-2a, through hole; 4-3, connecting rod; 4-3a, vertical section; 4-3b, horizontal section; 5, sieve plate; 6, breathing valve; 6-1, valve seat; 6-2, valve plate; 7, filter structure; 7-1, filter sponge; 7-2, filter screen; 8-1, first purge assembly; 8-2, second purge assembly; 8-3, third purge assembly; 9, limiting mechanism; 9-1, limiting seat; 9-2, limiting screw; 10, pressure regulating tube; 11, feed pipe; 12, hose; 13, proximity switch. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.
[0021] The following is combined with Figures 1-11 This application is described in further detail.
[0022] The present application discloses an articulated bulk material weighing device. Figures 1-4The articulated bulk material weighing device includes a shell 1, a weighing cavity 2, three weighing mechanisms 3 and a calibration mechanism 4, wherein: the weighing cavity 2 is hingedly hoisted in the shell 1 through the three weighing mechanisms 3, and the three weighing mechanisms 3 are parallel to each other and distributed in an equilateral triangle on the top of the shell 1, so as to be commonly used for weighing the weighing cavity 2; a sieve plate 5 is provided in the weighing cavity 2, and the sieve plate 5 divides the inner cavity of the weighing cavity 2 into a pressure regulating cavity 2-1 and a storage cavity 2-2, the pressure regulating cavity 2-1 is flexibly connected to a pressure regulating pipe 10 extending to the outside of the shell 1 for connecting to the pressure regulating gas circuit, and the storage cavity 2-2 is flexibly connected to a feeding pipe 11 extending to the outside of the shell 1 for receiving bulk materials, and the bottom of the storage cavity 2-2 is provided with a switchable discharge structure 2-3 for feeding to an external unit; the calibration mechanism 4 is provided at the upper end of the shell 1, and the calibration mechanism 4 is used to apply a load to the weighing cavity 2 to correct the weighing accuracy of the weighing mechanism 3.
[0023] With this design, by connecting the pressure-regulating pipe 10 to a pressure-regulating air circuit (such as a negative pressure suction device), connecting the feed pipe 10 to a bulk material storage device (such as a tobacco cabinet or a tobacco storage bin), and connecting the lower end of the housing 1 to a material handling unit (such as a tobacco reel), the device and the unit can be integrated. In actual use, the negative pressure suction effect at the pressure-regulating pipe 10 allows bulk material to flow from the bulk material storage device along the feed pipe 11 into the weighing chamber 2. The bulk material is intercepted by the sieve plate 5, allowing it to remain in the weighing chamber 2 for weighing. After weighing is completed, the bulk material is discharged through the discharge structure 2-3 into the material handling unit, thus completing high-precision detection of material usage in a single unit, and achieving extremely reliable measurement results.
[0024] With this design, the weighing device calculates the total material volume, deriving the actual production rate based on the predicted theoretical weight and the actual weighed weight. This rate can then be used to assess individual units. Furthermore, the device can also be used to calculate the total material volume for incoming material to the production workshop. Compared to the traditional extensive management approach of belt conveyor, electronic belt scale metering, and multi-duct conveying for the wire feeder, this device integrates metering and transfer functions, enabling precise material supply to a single unit and optimizing the factory's transition from extensive to refined management.
[0025] Specifically in this device, the weighing cavity 2 is hingedly suspended in the shell 1 by three weighing mechanisms 3. The three weighing mechanisms 3 are distributed in a planar equilateral triangle to ensure that the upper level of the weighing cavity 2 is maintained, ensuring that the weighing cavity 2 remains balanced in the suspended state, ensuring the consistency of the weighing zero position of each sensor, and improving the weighing accuracy and anti-eccentric load capability. The design of the flexible connection effectively eliminates the problem of inaccurate weighing caused by the rigid connection, improves the credibility of the weighing signal, and enhances the accuracy and stability of the weighing device. Calibration of the scale by the provided calibration mechanism 4 can avoid measurement errors caused by mechanical vibration and tare weight fluctuations. Under this new weighing structure and layout, the weighing device is simple to calibrate, has strong anti-eccentric load performance, high weighing accuracy, and extremely reliable measurement results.
[0026] Further, such as Figure 5 As shown, in some embodiments, the weighing mechanism 3 includes a shear beam weighing sensor 3-1, a connecting member 3-2 and a telescopically adjustable suspension member 3-3, wherein: the shear beam weighing sensor 3-1 is connected to the shell 1 through a bracket, the detection end of the shear beam weighing sensor 3-1 is hinged to the upper end of the suspension member 3-3 through the connecting member 3-2, and the rotation axis at the hinge is parallel to the feeding direction of the weighing cavity 2, the suspension member 3-3 is passed through the upper plate of the shell 1, and the weighing cavity 2 is suspended at the lower end of the suspension member 3-3.
[0027] Preferably, in this embodiment, the suspension member 3-3 includes two threaded rods 3-3a and a threaded sleeve 3-3b, wherein the two threaded rods 3-3a are spaced apart from each other, the upper threaded rod 3-3a is hinged at its upper end to the connector 3-2, and its lower end is threadedly connected to the upper end of the threaded sleeve 3-3b, while the lower end of the threaded sleeve 3-3b is threadedly connected to the lower threaded rod 3-3a, and the lower end of the threaded rod 3-3a is connected to the weighing chamber 2. The threads of the upper and lower ends of the threaded sleeve 3-3b have opposite rotation directions. By rotating and adjusting the threaded sleeve 3-3b, the hanging height can be adjusted to achieve force balance of the three articulated weighing mechanisms 3. In other embodiments, the suspension member 3-3 can also adopt other telescopically adjustable connectors 3-2 in the prior art.
[0028] Further, such as Figure 4 As shown, in some embodiments, the weighing chamber 2 is a rectangular parallelepiped with a chamfered corner at the lower end. The sieve plate 5 is tilted and disposed in the upper middle portion of the weighing chamber 2, with the circumferential edge of the sieve plate 5 connected to the inner wall of the weighing chamber 2. The sieve plate 5 divides the inner cavity of the weighing chamber 2 into an upper pressure regulating chamber 2-1 and a lower material storage chamber 2-2. The surface of the sieve plate 5 is provided with micropores, which can both ensure gas circulation and prevent bulk materials from passing through.
[0029] Further, such as Figure 3-Figure 4As shown, in some embodiments, the discharge structure 2-3 includes a discharge port and an actuator that controls the opening and closing of the discharge port. The discharge port is located at the bottom of the storage chamber 2-2. The actuator includes a cylinder 2-3a and a flap 2-3b. The push-pull cylinder 2-3a pushes the flap 2-3b to open and close the discharge port. The actuator can open and close the discharge port according to a control signal. Further preferably, the weighing chamber 2 is also provided with a detector for detecting the opening and closing status of the discharge port. The detector includes, but is not limited to, a proximity switch 13. Of course, in some other embodiments, the actuator includes an electrically or pneumatically controlled gate, which controls the opening and closing of the discharge port.
[0030] Further, such as Figure 6 As shown, in some embodiments, the calibration mechanism 4 includes a linear power member 4-1 and a weight 4-2. The linear power member 4-1 is mounted on the upper end of the housing 1. The linear power member 4-1 is used to drive the weight 4-2 to move up and down, so that the weight 4-2 applies a load to the top of the weighing cavity 2, or the weight 4-2 is separated from the weighing cavity 2. The linear power member 4-1 can be an electric push rod or a cylinder, which can accurately control the up and down movement of the weight 4-2. The mass of the weight 4-2 is set according to user needs. In actual use, a standard load is applied by the weight 4-2 to trigger the calibration program preset in the weighing device, so that the signal output by the weighing mechanism 3 matches the actual weight, thereby achieving the adjustment of the weighing accuracy. This principle is a prior art and will not be elaborated here.
[0031] Furthermore, in some embodiments, a through hole 4-2a that tapers from bottom to top is provided in the weight 4-2, and the through hole 4-2a is designed as a tapered hole. The calibration mechanism 4 also includes a connecting rod 4-3, which includes a vertical section 4-3a and a horizontal section 4-3b. The vertical section 4-3a is connected to the driving end of the linear power member 4-1. The horizontal section 4-3b is located in the through hole 4-2a, and the length of the horizontal section 4-3b is greater than the upper opening diameter of the through hole 4-2a and less than the lower opening diameter of the through hole 4-2a, ensuring that the weight 4-2 can stably contact the weighing cavity 2 during the descent process.
[0032] Further, such as Figure 3 As shown, in some embodiments, the weighing chamber 2 is provided with a breathing valve 6 that responds to the pressure state within the weighing chamber 2. When the pressure within the weighing chamber 2 is non-negative, the breathing valve 6 opens, allowing the weighing chamber 2 to communicate with the atmosphere. When the pressure within the weighing chamber 2 is negative, the breathing valve 6 closes. The provision of the breathing valve 6 facilitates material discharge from the weighing device.
[0033] Specifically, in some embodiments, the side wall of the weighing chamber 2 is provided with a side hole, and the breathing valve 6 includes a valve seat 6-1 and a valve plate 6-2. The valve seat 6-1 is provided on the side wall of the weighing chamber 2, and the valve seat 6-1 has a breathing port connected to the side hole. The top of the valve plate 6-2 is hinged to the outer end of the breathing port of the valve seat 6-1, and the outer end surface of the valve plate 6-2 is provided with a handle. When the pressure in the weighing chamber 2 is greater than or equal to the external atmospheric pressure, a gap is provided between the valve plate 6-2 and the breathing port, so that the inner cavity of the weighing chamber 2 is connected to the atmosphere. When the pressure in the weighing chamber 2 is less than the external atmospheric pressure, the valve plate 6-2 seals the breathing port under the action of negative pressure, thereby closing the breathing valve 6.
[0034] In some other embodiments, the breathing valve 6 further includes a spring mounted at the junction of the valve plate 6-2, which is used to apply an elastic force to the valve plate 6-2 to rotate inward. When the pressure within the weighing chamber 2 is greater than or equal to atmospheric pressure, the valve plate, under the action of the pressure, overcomes the spring force and opens, allowing the internal gas to communicate with the external atmosphere. When the pressure within the weighing chamber 2 is less than atmospheric pressure, the valve plate, under the combined action of the spring force and the external atmospheric pressure, clings to the valve seat 6-1, maintaining a closed state.
[0035] Furthermore, in some embodiments, a filter structure 7 is provided on the inner side of the breathing port of the breathing valve 6 , and the filter structure 7 is used to prevent external dust and impurities from entering the weighing cavity 2 , and also to prevent internal bulk materials (such as tobacco) from being discharged from the breathing valve 6 .
[0036] Preferably, in some embodiments, the filter structure 7 includes a filter sponge 7-1 and a filter screen 7-2. The filter sponge 7-1 is installed at the opening of the breathing port toward the weighing chamber 2 to achieve air circulation and block bulk materials (such as tobacco). The filter screen 7-2 is bonded to the surface of the filter sponge 7-1.
[0037] Preferably, in some other embodiments, the filter structure 7 is composed of multiple layers of filter screens with different pore sizes, and the pore sizes of the multiple filter screens gradually decrease from the inside to the outside.
[0038] Furthermore, in some embodiments, the weighing device further comprises a purge mechanism for purging the inner cavity of the weighing cavity 2. By providing the purge mechanism, internal dust accumulation is effectively avoided, the tare weight is more stable, and the measurement performance is more realistic.
[0039] In some embodiments, the purge mechanism includes: a first purge assembly 8-1 (such as Figure 4 The second purge assembly 8-2 (as shown) is provided at the connection between the pressure regulating chamber 2-1 and the pressure regulating pipe 10. Figure 9 The third purge assembly 8-3 (as shown) is provided at the connection between the storage chamber 2-2 and the feed pipe 11. Figure 10 shown).
[0040] The first, second, and third purge assemblies 8-1, 8-2, and 8-3 all include purge nozzles connected to compressed air lines. Generally, a control system can be used to schedule purges to maintain the cleanliness of each cavity within the device. In practice, a solenoid valve controls the flow of compressed air into the purge nozzles, purging the entire weighing device after the weighing cavity is discharged to prevent dust accumulation.
[0041] Further, such as Figure 11 As shown, in some embodiments, a limiting mechanism 9 is provided in the housing 1 for limiting the range of motion of the weighing cavity 2. In some embodiments, the limiting mechanism 9 includes a limiting seat 9-1 and a limiting screw 9-2. The limiting seat 9-1 is fixed to the inner wall of the housing 1, and the limiting screw 9-2 is screwed through the limiting seat 9-1. By screwing the limiting screw 9-2, the distance between the limiting screw 9-2 and the weighing cavity 2 can be adjusted, thereby achieving the adjustment of the range of motion of the weighing cavity 2.
[0042] Generally speaking, a limiting mechanism 9 is provided on both sides of the rotation axis of the weighing cavity 2 to prevent the weighing cavity 2 from shaking too much. In some other embodiments, the limiting structure can also adopt an electrically driven limiting mechanism 9 or the like.
[0043] Furthermore, in some embodiments, the housing 1 is a spliced aluminum alloy structure, which is lightweight overall, avoiding the excessive weight of a cast structure and the difficulty in maintaining the cigarette machine hopper. Preferably, the upper plate of the housing 1 is provided with reinforcing ribs to prevent deformation when bearing weight. The upper surface of the housing 1 is provided with components such as a digital conversion module and a solenoid valve.
[0044] Further, such as Figure 2 As shown, in some embodiments, the housing 1 includes a main housing 1-1, a wire feed port silo 1-2, and an air feed port silo 1-3. The main housing 1-1 is used to house components such as a weighing chamber 2 and a weighing mechanism 3. The silo is connected to the main housing 1-1 and is used to connect to pipelines such as the weighing chamber 2 and the feed pipe 11.
[0045] Preferably, the weighing chamber 2 is connected to the wire feed port silo 1-2 through a hose 12 (preferably a silicone hose), and the wire feed port silo 1-2 is connected to the feed pipe 11; the weighing chamber 2 is connected to the air delivery port silo 1-3 through another hose 12 (preferably a silicone hose), and the air delivery port silo 1-3 is connected to the pressure regulating pipe 10.
[0046] Preferably, Figure 11As shown, the outer side of the main shell 1-1 is provided with a top strip for positioning the shell 1 and the silo during installation. The bottom of the shell 1 is open, and a dust-proof soft leather 1-4 is provided at the bottom to prevent dust from splashing when the weighing cavity is unloaded.
[0047] Furthermore, in some embodiments, the weighing device includes a pressure regulating mechanism that communicates with a pressure regulating tube 10 to connect the pressure regulating tube to a pressure regulating gas circuit. The pressure regulating mechanism is used to regulate the internal air pressure of the weighing chamber 2 via the pressure regulating tube 10. The pressure regulating mechanism includes, but is not limited to, a negative pressure suction device. Preferably, a pneumatic ball valve regulated by a shell switch is provided in the pressure regulating tube 10. In other embodiments, the weighing device may not include a pressure regulating mechanism, but may instead be connected to an external pressure regulating mechanism.
[0048] Furthermore, in some embodiments, the weighing device also includes a control module, which is electrically connected to the weighing mechanism 3, the code calibration mechanism 4, etc., and is used to control the operation of various parts of the weighing device; its control principle is existing technology and will not be elaborated here.
[0049] When using this device, before operation, the control module controls the discharge structure 2-3 to be in the closed state, and the proximity switch 13 to the off signal. The control module performs the self-test and start-up peeling operation of the device based on the built-in program. During operation, the external cigarette making unit sends a material request signal to the weighing device. Then, based on the signal, the control module controls the pneumatic ball valve of the air delivery port silo 1-3 to open, and controls the pressure regulating mechanism to generate negative pressure. The tobacco is transported from the wire storage cabinet of the rolling unit through the feed pipe 11 to the wire feed port silo 1-2 and enters the weighing cavity. When the transported tobacco reaches the full material signal, the control module controls the pneumatic ball valve to close, and the wire feed port silo 1-2 stops feeding. At this time, the weight of the weighing cavity is stabilized, and the device automatically weighs through the weighing mechanism 3.
[0050] After weighing is completed, the measurement results are automatically stored or remotely sent to the MES system. At this time, the entire system detects whether the low material level signal of the cigarette making unit's storage bin is full. If it is in a low material state, the control module controls the discharge structure 2-3 to open, and the proximity switch 13 is on. The tobacco falls from the discharge structure 2-3 into the storage bin of the external cigarette making unit. At the same time, the purge system works, respectively purging the wire feed hopper 1-2, the air delivery hopper 1-3, and the wire suction screen 5 to prevent ash accumulation (the purge time can be set according to needs). After the weight returns to zero, the control module controls the discharge structure 2-3 to close and wait for the next production cycle.
[0051] It should be understood that the full material signal is obtained by the weight measured by the weighing chamber 2. Since the tare weight is constant, when the feeding exceeds a certain range of the tare weight (for example, 6kg, the weight is constantly changing at this time, but it can be judged that feeding is in progress), it is considered that the material is almost full. This is an empirical value and can be set in the control module.
[0052] It should be understood that expressions such as "include" and "may include" used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "include" and / or "have" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.
[0053] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.
[0055] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.
[0056] It is easy for those skilled in the art to understand that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.
Claims
1. An articulated bulk material weighing device, characterized in that: include: A housing (1), a weighing cavity (2), three weighing mechanisms (3) and a calibration mechanism (4), wherein: The weighing cavity (2) is hingedly mounted in the housing (1) via three weighing mechanisms (3), and the three weighing mechanisms (3) are distributed in an equilateral triangle on the top of the housing (1) to be used together for weighing the weighing cavity (2); A sieve plate (5) is provided in the weighing cavity (2), and the sieve plate (5) divides the inner cavity of the weighing cavity (2) into a pressure regulating cavity (2-1) and a material storage cavity (2-2); the pressure regulating cavity (2-1) is flexibly connected to a pressure regulating pipe (10) for connecting to a pressure regulating gas circuit; the material storage cavity (2-2) is flexibly connected to a feeding pipe (11) for receiving bulk materials; and a discharge structure (2-3) for supplying materials to an external unit that can be switched on and off is provided at the bottom of the material storage cavity (2-2); The calibration mechanism (4) is arranged at the upper end of the housing (1), and is used to apply a load to the weighing cavity (2) to calibrate the weighing accuracy of the weighing mechanism (3).
2. The articulated bulk material weighing device according to claim 1, characterized in that: The weighing mechanism (3) comprises a shear beam type weighing sensor (3-1), a connecting member (3-2) and a telescopically adjustable suspension member (3-3), wherein: The shear beam type weighing sensor (3-1) is connected to the housing (1); the detection end of the shear beam type weighing sensor (3-1) is hinged to the upper end of the suspension member (3-3) via a connecting member (3-2); and the weighing cavity (2) is suspended at the lower end of the suspension member (3-3).
3. The articulated bulk material weighing device according to claim 1, characterized in that: The calibration mechanism (4) comprises a linear power member (4-1) and a weight (4-2); the linear power member (4-1) is arranged at the upper end of the housing (1); and the linear power member (4-1) is used to drive the weight (4-2) to move up and down, so that the weight (4-2) applies a load to the top of the weighing cavity (2), or separates the weight (4-2) from the weighing cavity (2).
4. The articulated bulk material weighing device according to claim 3, characterized in that: The weight (4-2) is provided with a through hole (4-2a) that gradually shrinks from bottom to top. The calibration mechanism (4) further comprises a connecting rod (4-3), the connecting rod (4-3) comprising a vertical section (4-3a) and a horizontal section (4-3b), wherein: The vertical section (4-3a) is connected to the driving end of the linear power member (4-1); The horizontal section (4-3b) is located in the through hole (4-2a), and the length of the horizontal section (4-3b) is greater than the upper opening diameter of the through hole (4-2a) and smaller than the lower opening diameter of the through hole (4-2a).
5. The articulated bulk material weighing device according to claim 1, characterized in that: The weighing cavity (2) is provided with a breathing valve (6) capable of responding to the pressure state in the weighing cavity (2), wherein: When the inner cavity of the weighing cavity (2) is in a non-negative pressure state, the breathing valve (6) is opened to connect the inner cavity of the weighing cavity (2) with the atmosphere; When the inner cavity of the weighing cavity (2) is in a negative pressure state, the breathing valve (6) is closed.
6. The articulated bulk material weighing device according to claim 5, characterized in that: A filtering structure (7) is provided on the inner side of the breathing valve (6).
7. The articulated bulk material weighing device according to claim 1, characterized in that: The weighing device also includes a purging mechanism for purging the inner cavity of the weighing cavity (2).
8. The articulated bulk material weighing device according to claim 7, characterized in that: The purge mechanism comprises: a first purge assembly (8-1) disposed in the pressure regulating chamber (2-1) with a purge port facing the sieve plate (5); a second purge assembly (8-2) provided at the connection point between the pressure regulating chamber (2-1) and the pressure regulating pipe (10); A third purge assembly (8-3) is provided at the connection point between the storage chamber (2-2) and the feed pipe (11).
9. The articulated bulk material weighing device according to any one of claims 1 to 8, characterized in that: A limiting mechanism (9) for limiting the range of movement of the weighing cavity (2) is provided in the housing (1).
10. The articulated bulk material weighing device according to any one of claims 1 to 8, characterized in that: The housing (1) comprises a main housing (1-1), a wire feed port silo (1-2) and an air delivery port silo (1-3), wherein the wire feed port silo (1-2) and the air delivery port silo (1-3) are respectively arranged at opposite ends of the main housing (1-1), wherein: The weighing cavity (2) is connected to the wire feed port silo (1-2) via a hose (12), and the wire feed port silo (1-2) is connected to the feed pipe (11); The weighing cavity (2) is connected to the air delivery port silo (1-3) via another hose (12), and the air delivery port silo (1-3) is connected to the pressure regulating pipe (10).