Material flow control device and metering device

Abstract

The utility model relates to the technical field of material metering control, and discloses a material flow control device and a metering device.The material flow control device comprises a material conveying pipe, a flow control cover, an expansion piece and a transmission assembly, and a flow control opening is formed in the material conveying pipe. When the flow control cover needs to be switched between the closed state and the open state, the expansion piece is started, the expansion piece drives the transmission plate to rotate, the transmission plate drives the rotating rod to rotate in the axial direction, the rotating rod drives the flow control cover to rotate relative to the material conveying pipe, and therefore materials in the material conveying pipe are prevented from being output from the flow control opening or allowed to be output from the flow control opening. Compared with a valve plate sliding mode and a flow control cover rotating opening and closing mode in the prior art, the friction force is greatly reduced, the expansion piece acts, the flow control cover can respond quickly, namely, the flow control cover acts almost while the expansion piece is controlled to stretch out and draw back, the time difference between actions of the expansion piece and the flow control cover is small, and the response time is short; and the influence of response time on the metering precision of the material is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of material metering control, and specifically relates to a material flow control device and a metering device. Background Art

[0002] During the metering process of powdered and granular materials, in order to ensure the metering accuracy, the materials are output to the metering scale in small quantities and multiple times. When the materials reach the required amount, the material output to the metering scale is stopped.

[0003] In the prior art, the metering device for powder and granular materials is usually a metering gate valve, including a cylinder, a valve plate and a frame. The valve plate is arranged in the frame, and the edge of the valve plate slides with the frame. The cylinder drives the valve plate to slide relative to the frame to realize the opening and closing of the valve plate, thereby realizing the output of small quantities of materials multiple times. Since the valve plate will generate friction with the frame during the movement, the cylinder not only needs to generate power to drive the valve plate to move, but also needs to generate power to overcome the friction between the valve plate and the frame, resulting in a long response time of the valve plate, that is, a large time difference between the action of the cylinder and the action of the valve plate, thereby affecting the accuracy of material metering. Utility Model Content

[0004] The purpose of the present application is to provide a material flow control device and a metering device, in which the time difference between the action of the telescope and the action of the flow control cover is short, that is, the response time of the telescope is short, thereby ensuring the accuracy of material metering.

[0005] In order to achieve the above-mentioned objectives, the first aspect of the present application provides a material flow control device, comprising: a material conveying pipe, a flow control port is provided on the material conveying pipe; a flow control cover, the flow control cover is rotatably arranged relative to the material conveying pipe, and has a closed state that prevents the material in the material conveying pipe from being discharged from the flow control port, and an open state that allows the material in the material conveying pipe to be discharged from the flow control port; a telescope, the telescope is arranged on the material conveying pipe; and a transmission assembly, the telescope is driven and connected to the flow control cover through the transmission assembly, the transmission assembly includes a transmission plate and a rotating rod rotatably mounted to the material conveying pipe and transmission-coordinated with the flow control cover, one end of the transmission plate is rotatably connected to the telescopic end of the telescope, and the other end is fixedly connected to the rotating rod, so that during the telescopic process of the telescope, the flow control cover is driven by the transmission assembly to repeatedly switch between the closed state and the open state.

[0006] In some embodiments, the transmission assembly also includes a linkage plate, and the rotating rod is connected to the flow control cover through the linkage plate; and / or, the telescope includes a sleeve, a pneumatic tendon and a spring, the end of the pneumatic tendon is rotatably connected to the transmission plate, the pneumatic tendon is partially disposed in the sleeve, and the pneumatic tendon is movably disposed relative to the sleeve, one end of the spring is connected to the sleeve, and the other opposite end of the spring is connected to the pneumatic tendon.

[0007] In some embodiments, one side of the linkage plate facing the flow control cover is partially fitted with one side of the flow control cover facing the linkage plate; and / or, the flow control cover and the linkage plate are both located in the feed pipe, the rotating rod is passed through the feed pipe and is rotatably connected to the wall of the feed pipe, and the transmission plate is located outside the feed pipe.

[0008] In some embodiments, the transmission assembly further includes a reinforcing plate, which is connected to the material delivery pipe and rotatably connected to the rotating rod; and / or the flow control cover is flexible.

[0009] In some embodiments, at least two reinforcement plates are provided, wherein two reinforcement plates are respectively provided at opposite ends of the rotating rod, and more than two reinforcement plates are arranged at intervals along the extension direction of the rotating rod.

[0010] In some embodiments, the flow control cover includes a connecting plate and a covering pad, the connecting plate is connected to the tube wall of the feed pipe, and the covering pad is rotatably arranged relative to the feed pipe. In a closed state, the covering pad seals the flow control port, and in an open state, the covering pad opens at least part of the flow control port.

[0011] In some embodiments, the flow control cover further comprises a sealing strip, which is arranged on a side of the covering pad facing the material supply direction of the material in the feeding pipe. In a closed state, the sealing strip is sealed against the wall of the feeding pipe.

[0012] In some embodiments, the covering pad is circular, the connecting plate and the sealing strip are both arc-shaped, and both are arranged on the edge of the covering pad, and the connecting plate is attached to the pipe wall of the conveying pipe.

[0013] In some embodiments, the feed pipe includes an inlet section, a feed section and a discharge section which are connected in sequence, the flow control cover is located between the feed section and the discharge section, the feed section is inclined, the discharge section is sleeved on the outer periphery of one end of the feed section facing the discharge section, and a flow control port is opened on the end face of the end of the feed section.

[0014] A second aspect of the present application provides a metering device, including a metering scale and the above-mentioned material flow control device, wherein the metering scale is arranged below the flow control port of the material conveying pipe.

[0015] Through the above technical solution, when the flow control cover needs to switch between the closed state and the open state, the retractor is started, the retractor drives the transmission plate to rotate, the transmission plate drives the rotating rod to rotate axially, and the rotating rod drives the flow control cover to rotate relative to the material delivery pipe to prevent or allow the material in the material delivery pipe to be discharged from the flow control port. Compared with the sliding method of the valve plate in the prior art, the friction force of the flow control cover is greatly reduced by the rotation opening and closing method of the flow control cover, so that the retractor is actuated and the flow control cover can respond quickly, that is, the flow control cover will be actuated almost at the same time as the retractor is controlled to extend and retract, and the time difference between the two actions is small, and the response time is short, so as to avoid affecting the metering accuracy of the material due to the response time.

[0016] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0018] Figure 1 It is a structural schematic diagram of the material flow control device of the utility model;

[0019] Figure 2 is a schematic diagram of the structure of the material flow control device, wherein the expander is a cross-sectional view;

[0020] Figure 3 It is a structural schematic diagram of a material flow control device, wherein the discharge section of the material conveying pipe is not shown;

[0021] Figure 4 It is a partial structural schematic diagram of the material flow control device;

[0022] Figure 5 It is a cross-sectional view of the expansion joint of the material flow control device;

[0023] Figure 6 It is a structural schematic diagram of a flow control cover of a material flow control device;

[0024] Figure 7 for Figure 6 A schematic diagram of the structure from another angle; and

[0025] Figure 8 It is a schematic diagram of the structure of the rotating rod and linkage plate of the transmission assembly of the material flow control device.

[0026] Description of Reference Numerals

[0027] 10. Feed pipe; 11. Feeding section; 12. Feeding section; 13. Discharging section; 20. Flow control cover; 21. Connecting plate; 22. Covering pad; 23. Sealing strip; 30. Retractor; 31. Sleeve; 32. Pneumatic muscle; 33. Spring; 40. Transmission assembly; 41. Transmission plate; 42. Rotating rod; 43. Linkage plate; 44. Reinforcement plate; 45. Claw; 51. Air source; 52. Proportional valve; 53. High-frequency solenoid valve. DETAILED DESCRIPTION

[0028] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0029] See also Figures 1 to 8 As shown, the utility model provides a material flow control device, including: a feed pipe 10, on which a flow control port is provided; a flow control cover 20, which is rotatably arranged relative to the feed pipe 10 and has a closed state for preventing the material in the feed pipe 10 from being discharged from the flow control port and an open state for allowing the material in the feed pipe 10 to be discharged from the flow control port; a telescope 30, which is arranged on the feed pipe 10; and a transmission assembly 40, the telescope 30 is driven and connected to the flow control cover 20 through the transmission assembly 40, the transmission assembly 40 includes a transmission plate 41 and a rotating rod 42 rotatably mounted to the feed pipe 10 and transmission-coordinated with the flow control cover 20, one end of the transmission plate 41 is rotatably connected to the telescopic end of the telescope 30, and the other end is fixedly connected to the rotating rod 42, so that during the telescopic process of the telescope 30, the flow control cover 20 is driven to switch repeatedly between the closed state and the open state through the transmission assembly 40.

[0030] In this embodiment, the telescope 30 is shortened, driving one end of the transmission plate 41 to move in the direction toward the telescope 30, and the other end of the transmission plate 41 drives the rotating rod 42 to rotate, and the rotating rod 42 drives the flow control cover 20 to rotate in the direction away from the flow control port, so that the flow control cover 20 opens the flow control port. At this time, the flow control cover 20 is in an open state, and the material in the conveying pipe 10 is discharged from the flow control port; the telescope 30 is extended, driving one end of the transmission plate 41 to move in the direction away from the telescope 30, and the other end of the transmission plate 41 drives the rotating rod 42 to rotate, and the rotating rod 42 drives the flow control cover 20 to rotate in the direction toward the flow control port until the flow control cover 20 closes the flow control port. At this time, the flow control cover 20 is in a closed state, and the material in the conveying pipe 10 cannot be discharged from the flow control port. The telescopic device 30 reciprocates and retracts, and drives the flow control cover 20 to switch back and forth between the open state and the closed state through the transmission assembly 40, so that the material in the feed pipe 10 is discharged from the flow control port in small quantities and multiple times. When the amount of material output reaches the required amount, the telescopic device 30 is operated to drive the flow control cover 20 to remain in the closed state, and the material in the feed pipe 10 is no longer discharged from the flow control port, thereby achieving the effect of controlling the material output amount. Since the flow control cover 20 switches between the closed state and the open state by rotating relative to the feed pipe 10, compared with the sliding method of the valve plate in the prior art, the friction force is greatly reduced, so that when the telescopic device 30 is extended or retracted, the flow control cover 20 can respond quickly, that is, the flow control cover 20 will act almost at the same time as the telescopic device 30 is extended or retracted, and the time difference between the two actions is small, that is, the response time of the flow control cover 20 is short. When the amount of material output from the feed pipe 10 reaches the demand, the telescopic device 30 is operated, and the flow control cover 20 can be quickly switched and maintained in the closed state, thereby preventing more material than the demand from continuing to be output from the feed pipe 10, thereby ensuring the metering accuracy of the material.

[0031] See also Figures 1 to 8 As shown, in some embodiments of the utility model, the retractor 30 includes a sleeve 31, a pneumatic tendon 32 and a spring 33, the end of the pneumatic tendon 32 is rotatably connected to the transmission plate 41, the pneumatic tendon 32 is partially disposed in the sleeve 31, and the pneumatic tendon 32 is movably disposed relative to the sleeve 31, one end of the spring 33 is connected to the sleeve 31, and the other opposite end of the spring 33 is connected to the pneumatic tendon 32.

[0032] In this embodiment, the pneumatic tendon 32 moves relative to the sleeve 31 through gas, the pneumatic tendon 32 shortens, the spring 33 contracts, and the flow control cover 20 is in an open state; when the pneumatic tendon 32 extends, in addition to the pneumatic tendon 32 being driven to extend by gas, the elastic force of the spring 33 also provides the pneumatic tendon 32 with power to extend, so that the pneumatic tendon 32 extends faster, thereby making the flow control cover 20 switch from the open state to the closed state faster, and then the material in the feed pipe 10 is quickly blocked by the flow control cover 20 after a small amount is discharged from the flow control port, thereby reducing the amount of material output from the flow control port at a single time, so as to achieve precise control.

[0033] In addition, since the pneumatic muscle 32 expands and contracts at a high frequency, the spring 33 also plays a buffering role to protect the pneumatic muscle 32 .

[0034] Specifically, when the spring 33 is in the original length state, the flow control cover 20 is in the closed state, so that the spring 33 can assist the pneumatic muscle 32 to keep the flow control cover 20 in the closed state.

[0035] Specifically, the material flow control device also includes an air source 51, a proportional valve 52 and a high-frequency electromagnetic valve 53. The air source 51 is connected to the retractor 30 to provide the air source 51 for the retractor 30; the proportional valve 52 and the high-frequency electromagnetic valve 53 are both arranged on the connecting pipeline between the air source 51 and the retractor 30. The proportional valve 52 can set the output air pressure to control the extension range of the retractor 30, thereby controlling the opening range of the flow control cover 20, and then controlling the amount of material output from the flow control port at a time, that is, controlling the minimum graduation value of material metering; the high-frequency electromagnetic valve 53 opens and closes to allow and block the air source 51 from entering the retractor 30, and the high-frequency repeated opening and closing of the high-frequency electromagnetic valve 53 is used to achieve the high-frequency repeated expansion and contraction of the retractor 30. The combination of the proportional valve 52 and the high-frequency electromagnetic valve 53 can realize the high-frequency vibration of the retractor 30, so as to accurately control the amount of material output from the flow control port, thereby achieving high metering accuracy. In addition, the opening range of the control cover can be adjusted by the proportional valve 52 to be suitable for the metering of different types of materials, and has a wide range of applications.

[0036] In other embodiments, the material control device also includes a controller, a weighing scale for weighing the material is electrically connected to the controller, the controller is electrically connected to the high-frequency solenoid valve 53, the weighing scale sends the weighed weight value to the controller in real time, the controller receives the weight value and compares the weight value with an internally stored preset value, when the weight value is the same as the preset value or the difference is within a predetermined range, the controller controls the high-frequency solenoid valve 53 to close, so that the telescope 30 stops telescoping, and thereby keeps the flow control cover 20 in a closed state.

[0037] See also Figures 1 to 8As shown, in some embodiments of the present invention, the transmission assembly 40 further includes a linkage plate 43, and the rotating rod 42 is connected to the flow control cover 20 via the linkage plate 43. The side of the linkage plate 43 facing the flow control cover 20 is partially fitted with the side of the flow control cover 20 facing the linkage plate 43.

[0038] In this embodiment, the rotating rod 42 is connected to the linkage plate 43, and the rotating rod 42 rotates axially, driving the linkage plate 43 to rotate with the axis of the rotating rod 42 as the rotating axis, thereby driving the flow control cover 20 to rotate. Since the area where the rotating rod 42 can contact the flow control cover 20 is small, the linkage plate 43 is provided, and the contact area between the linkage plate 43 and the flow control cover 20 is large, so that the rotating rod 42 rotates, which can stably drive the flow control cover 20 to rotate, and ensure that the flow control cover 20 can smoothly switch between the closed state and the open state.

[0039] Specifically, the linkage plate 43 is a flat plate, including a straight edge and an arc edge, the rotating rod 42 is connected to the straight edge, and the arc edge is connected to the edge of the flow control cover 20. The linkage plate 43 is connected to the flow control cover 20 by bolts.

[0040] Specifically, the transmission assembly 40 also includes a U-shaped claw 45, which is fixed at the end of the pneumatic tendon 32, and the opening of the claw 45 faces the transmission plate 41. The transmission plate 41 is clamped inside the claw 45 and is rotatably connected to the claw 45 through a pin shaft. There are two connection points between the claw 45 and the transmission plate 41, which increases the stability of the pneumatic tendon 32 in the process of driving the transmission plate 41 to rotate.

[0041] See also Figures 1 to 8 As shown, in some embodiments of the present invention, the flow control cover 20 and the linkage plate 43 are both located in the feed pipe 10, the rotating rod 42 passes through the feed pipe 10 and is rotatably connected to the wall of the feed pipe 10, and the transmission plate 41 is located outside the feed pipe 10.

[0042] In this embodiment, the feed pipe 10 protects the flow control cover 20 and the linkage plate 43 to prevent external factors from affecting and damaging the flow control cover 20 and the linkage plate 43; the space outside the feed pipe 10 is large, which is convenient for the arrangement of the transmission plate 41.

[0043] Specifically, the expander 30 is disposed outside the material conveying pipe 10 to avoid occupying the limited space inside the material conveying pipe 10 .

[0044] See also Figures 1 to 8 As shown, in some embodiments of the present invention, the transmission assembly 40 further includes a reinforcing plate 44 , which is connected to the feed pipe 10 and is rotatably connected to the rotating rod 42 .

[0045] In this embodiment, the end of the rotating rod 42 is rotatably connected to the reinforcing plate 44 and the transmission plate 41. The reinforcing plate 44 is fixed on the feed pipe 10 to provide a support point for the rotating rod 42 to ensure the stability of the rotating rod 42 during rotation.

[0046] See also Figures 1 to 8 As shown, in some embodiments of the present invention, at least two reinforcement plates 44 are provided, wherein two reinforcement plates 44 are respectively provided at opposite ends of the rotating rod 42 , and more than two reinforcement plates 44 are arranged at intervals along the extension direction of the rotating rod 42 .

[0047] In this embodiment, the reinforcing plate 44 provides support points for both ends of the rotating rod 42, ensuring that the rotating rod 42 can rotate along its own axis and ensure that the rotating rod 42 can rotate stably to avoid deviation of the rotating rod 42 during rotation.

[0048] Specifically, two reinforcing plates 44 are provided, which are respectively provided at opposite ends of the rotating rod 42. The reinforcing plates 44 are located outside the material conveying pipe 10.

[0049] See also Figures 1 to 8 As shown, in some embodiments of the present invention, the flow control cover 20 is flexible.

[0050] Through the above-mentioned arrangement, on the one hand, when the flow control cover 20 is in the closed state, the flexible flow control cover 20 can be sealed with the tube wall of the feed pipe 10 to prevent the material in the feed pipe 10 from leaking out from the gap between the flow control cover 20 and the feed pipe 10; on the other hand, since the flow control cover 20 switches between the closed state and the open state at a high frequency, the flow control cover 20 is set to be flexible so that there is soft contact between the flow control cover 20 and the feed pipe 10, thereby preventing the flow control cover 20 from causing wear to the feed pipe 10 and preventing the flow control cover 20 from wearing itself, thereby extending the service life of the flow control cover 20; on the other hand, the flexible flow control cover 20 can be deformed so that the flow control cover 20 can rotate relative to the flow control port without the need for rotating parts, thereby avoiding a large number of parts and increasing the complexity of the entire material flow control device.

[0051] Specifically, the flow control cover 20 may be made of silicone rubber material.

[0052] See also Figures 1 to 8 As shown, in some embodiments of the utility model, the flow control cover 20 includes a connecting plate 21 and a covering pad 22, the connecting plate 21 is connected to the tube wall of the feed pipe 10, and the covering pad 22 is rotatably arranged relative to the feed pipe 10. In the closed state, the covering pad 22 closes the flow control port, and in the open state, the covering pad 22 opens at least part of the flow control port.

[0053] In this embodiment, the connecting plate 21 fixes the covering pad 22 at the position of the flow control port, and the linkage plate 43 rotates, causing the covering pad 22 to deform and rotate in a direction away from the flow control port to partially open the flow control port. During this process, the connecting plate 21 always maintains connection with the feed pipe 10 to prevent the covering pad 22 from detaching from the feed pipe 10.

[0054] See also Figures 1 to 8 As shown, in some embodiments of the present invention, the flow control cover 20 also includes a sealing strip 23, which is arranged on a side of the covering pad 22 facing the material incoming direction of the material in the feed pipe 10. In the closed state, the sealing strip 23 is sealed with the pipe wall of the feed pipe 10.

[0055] In this embodiment, when the flow control cover 20 is closed, the sealing strip 23 is attached to the inner wall of the feed pipe 10 to seal the gap between the covering pad 22 and the feed pipe 10 to prevent the material in the feed pipe 10 from leaking out of the gap.

[0056] See also Figures 1 to 8 As shown, in some embodiments of the present invention, the covering pad 22 is circular, the connecting plate 21 and the sealing strip 23 are both arc-shaped, and both are arranged on the edge of the covering pad 22, and the connecting plate 21 is attached to the pipe wall of the conveying pipe 10.

[0057] In the present embodiment, the linkage plate 43 is in contact with a portion of the covering pad 22. During the rotation of the linkage plate 43, a portion of the covering pad 22 is driven to rotate relative to the flow control port. The sealing strip 23 is arranged at the edge of the portion of the covering pad 22. During the rotation of the covering pad 22, the sealing strip 23 rotates together with the covering pad 22. During the rotation of the linkage plate 43, another portion of the covering pad 22 is fixed. The connecting plate 21 is arranged at the edge of the portion of the covering pad 22, so that the rotation of the covering pad 22 does not affect the fixation of the connecting plate 21, thereby ensuring that the connecting plate 21 can always be in contact with the pipe wall of the feed pipe 10, that is, ensuring that the connecting plate 21 can always be stably connected to the feed pipe 10, thereby avoiding affecting the connection between the connecting plate 21 and the feed pipe 10 during the rotation of the covering pad 22, thereby avoiding the connection plate 21 being separated from the feed pipe 10.

[0058] Specifically, the connecting plate 21 occupies one third to one half of the circular edge of the covering pad 22, and the sealing strip 23 occupies one half to two thirds of the circular edge of the covering pad 22. The sealing strip 23 and the connecting plate 21 are both perpendicular to the covering pad 22, and the height of the sealing strip 23 protruding from the covering pad 22 is less than the height of the connecting plate 21 protruding from the covering pad 22. On the one hand, the covering pad 22 can be rotated by a small amplitude to open part of the flow control port, avoiding the sealing strip 23 protruding from the covering pad 22 too high and hindering the material in the conveying pipe 10 from being discharged from the flow control port; on the other hand, the contact area between the connecting plate 21 and the conveying pipe 10 is increased, the stability of the connection between the two is increased, and the connecting plate 21 is prevented from being separated from the conveying pipe 10.

[0059] Specifically, the flow control port is circular, and the diameter of the covering pad 22 is larger than the caliber of the flow control port so as to completely cover the flow control port; the feed pipe 10 is a round tube, so that the connecting plate 21 and the sealing strip 23 can both fit on the tube wall of the feed pipe 10.

[0060] See also Figures 1 to 8 As shown, in some embodiments of the utility model, the feed pipe 10 includes an inlet section 11, a feed section 12 and a discharge section 13 which are connected in sequence, a flow control cover 20 is located between the feed section 12 and the discharge section 13, the feed section 12 is inclined, the discharge section 13 is sleeved on the outer periphery of one end of the feed section 12 facing the discharge section 13, and a flow control port is opened on the end face of the end of the feed section 12.

[0061] In this embodiment, Figure 2 The shown orientation is for reference. The inclined setting of the feeding section 12 allows the material to slide down along the inner wall of the feeding section 12 and accumulate to the lower right corner of the feeding section 12. When the covering pad 22 of the flow control cover 20 rotates relative to the flow control port, the position of the flow control cover 20 farthest from the flow control port is the lower right corner of the flow control cover 20. Therefore, in the process of switching the flow control cover 20 from a closed state to an open state, the lower right corner of the flow control port is opened first, so that the material accumulated at the lower right corner of the feeding section 12 can be quickly output from the lower right corner of the flow control port. On the one hand, the efficiency of material output is improved, thereby improving the efficiency of material metering; on the other hand, when the covering pad 22 rotates by a small amplitude, material can also be output from the flow control port, so that the amount of material output from the flow control port at a single time can be reduced by reducing the telescopic amplitude of the telescope 30, thereby achieving more accurate material metering.

[0062] Specifically, Figure 2 The shown orientation is for reference only, the feed section 11 is vertically arranged, the upper portion of the discharge section 13 extends in the same direction as the feed section 12, and the lower portion of the discharge section 13 extends in the vertical direction. The material enters from the feed section 11, slides down along the inclined inner wall of the feed section 12 to the flow control port, and when the flow control cover 20 is in the open state, the material passes through the flow control port and is output from the discharge section 13.

[0063] Specifically, the end surface of one end of the material conveying section 12 facing the material inlet section 11 is completely open to form a flow control port.

[0064] The utility model also provides a metering device, including a metering scale and the above-mentioned material flow control device, wherein the metering scale is arranged below the flow control port of the material conveying pipe 10 .

[0065] In this embodiment, all materials output from the flow control port fall onto the metering scale and are weighed by the metering scale.

[0066] The material flow control device of the metering device has all the technical solutions and all the basic effects of the above-mentioned material metering device, which will not be repeated here.

[0067] In the description of the present application, it should be understood that 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0068] In this application, 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, an electrical connection, or communication with each other; 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 this application can be understood according to specific circumstances.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0070] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A material flow control device, characterized in that: include: A material delivery pipe (10), wherein a flow control port is provided on the material delivery pipe (10); a flow control cover (20), the flow control cover (20) being rotatably arranged relative to the material delivery pipe (10) and having a closed state for preventing the material in the material delivery pipe (10) from being discharged from the flow control port, and an open state for allowing the material in the material delivery pipe (10) to be discharged from the flow control port; an expansion joint (30), wherein the expansion joint (30) is arranged on the material conveying pipe (10); and A transmission assembly (40), wherein the telescopic device (30) is drivingly connected to the flow control cover (20) via the transmission assembly (40), and the transmission assembly (40) comprises a transmission plate (41) and a rotating rod (42) rotatably mounted to the material conveying pipe (10) and drivingly matched with the flow control cover (20), wherein one end of the transmission plate (41) is rotatably connected to the telescopic end of the telescopic device (30), and the other end is fixedly connected to the rotating rod (42), so that during the telescopic process of the telescopic device (30), the flow control cover (20) is driven by the transmission assembly (40) to repeatedly switch between the closed state and the open state.

2. The material flow control device according to claim 1, characterized in that: The transmission assembly (40) further comprises a linkage plate (43), and the rotating rod (42) is connected to the flow control cover (20) via the linkage plate (43); and / or, The retractor (30) includes a sleeve (31), a pneumatic muscle (32) and a spring (33), wherein the end of the pneumatic muscle (32) is rotatably connected to the transmission plate (41), the pneumatic muscle (32) is partially disposed in the sleeve (31), and the pneumatic muscle (32) is movably disposed relative to the sleeve (31), one end of the spring (33) is connected to the sleeve (31), and the other opposite end of the spring (33) is connected to the pneumatic muscle (32).

3. The material flow control device according to claim 2, characterized in that: A side of the linkage plate (43) facing the flow control cover (20) is partially in contact with a side of the flow control cover (20) facing the linkage plate (43); and / or, The flow control cover (20) and the linkage plate (43) are both located inside the feed pipe (10), the rotating rod (42) passes through the feed pipe (10) and is rotatably connected to the wall of the feed pipe (10), and the transmission plate (41) is located outside the feed pipe (10).

4. The material flow control device according to claim 1, characterized in that: The transmission assembly (40) further comprises a reinforcing plate (44), wherein the reinforcing plate (44) is connected to the material conveying pipe (10) and is rotatably connected to the rotating rod (42); and / or, The flow control cover (20) is flexible.

5. The material flow control device according to claim 4, characterized in that: The number of the reinforcing plates (44) is at least two, wherein the two reinforcing plates (44) are respectively arranged at opposite ends of the rotating rod (42), and more than two reinforcing plates (44) are arranged at intervals along the extension direction of the rotating rod (42).

6. The material flow control device according to claim 4, characterized in that: The flow control cover (20) comprises a connecting plate (21) and a covering pad (22), wherein the connecting plate (21) is connected to the tube wall of the material conveying pipe (10), and the covering pad (22) is rotatably arranged relative to the material conveying pipe (10). In the closed state, the covering pad (22) closes the flow control port, and in the open state, the covering pad (22) opens at least a portion of the flow control port.

7. The material flow control device according to claim 6, characterized in that: The flow control cover (20) further comprises a sealing strip (23), wherein the sealing strip (23) is arranged on a side of the covering pad (22) facing the material supply direction of the material in the material delivery pipe (10), and in the closed state, the sealing strip (23) is in sealing cooperation with the pipe wall of the material delivery pipe (10).

8. The material flow control device according to claim 7, characterized in that: The covering pad (22) is circular, the connecting plate (21) and the sealing strip (23) are both arc-shaped, and both are arranged on the edge of the covering pad (22), and the connecting plate (21) is attached to the pipe wall of the conveying pipe (10).

9. The material flow control device according to any one of claims 1 to 8, characterized in that: The feed pipe (10) comprises a feed section (11), a feed section (12) and a discharge section (13) which are connected in sequence; the flow control cover (20) is located between the feed section (12) and the discharge section (13); the feed section (12) is arranged obliquely; the discharge section (13) is sleeved on the outer periphery of one end of the feed section (12) facing the discharge section (13); and the end surface of the feed section (12) is provided with the flow control port.

10. A metering device, characterized in that: It comprises a metering scale and a material flow control device as claimed in any one of claims 1 to 9, wherein the metering scale is arranged below the flow control port of the material conveying pipe (10).

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