Powder conveying device with dynamic weighing structure

Abstract

The invention provides a powder conveying device with a dynamic weighing structure, and relates to the technical field of powder dynamic weighing devices.The powder conveying device comprises a weighing platform, a feeding assembly is installed on the upper surface of the weighing platform, a hopper installed in a suspended mode is arranged above the feeding assembly, and an air closing machine is installed at the bottom of the hopper; the bottom of the air lock is communicated with the feeding assembly through a flexible connection part, and a terminal guide pipe is fixedly connected to the outer side wall of one end of the feeding assembly. The transition opening is opened to transition powder into the transition assembly, excessive powder continuously fed into the transition opening in the metering guide pipe is gradually and finely fed into the auxiliary pipe for discharging through rotation of the outer spiral blade in the transition assembly, switching adjustment of small-flow supply can be rapidly responded through the design, the discharging flow is stable, and the discharging efficiency is high. And the small-flow feeding precision of the materials can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of powder material dynamic weighing devices, and in particular to a powder material conveying device with a dynamic weighing structure. Background Art

[0002] During the process of powder material transportation and feeding, the flow characteristics of the powder are affected by the bulk density of the material and the size, shape and viscosity of individual particles. The environmental humidity, temperature, vibration or the introduction of different powders can change the characteristics of the powder or powder mixture. When conveying and feeding different powders, the quantitative feeding of the powder is difficult to control due to the influence of the powder flow characteristics. The dynamic weighing device for powders can be used to monitor the changes in powder quality in real time and guide the feeding to facilitate the control of the powder feeding flow and uniform feeding.

[0003] At present, when powder is fed through a powder conveying device under the real-time monitoring of a powder dynamic weighing device and the feeding is changed to a small flow rate, due to the excess powder in the feeding pipe (the feeding pipe is filled with powder from the flow rate feeding stage before the change), it is necessary to achieve small flow rate feeding by transmitting the powder at a low speed in the early stage of the small flow rate feeding. However, powder with poor fluidity is easily agglomerated and falls at the powder outlet during the process of being pushed at a low speed in the feeding pipe, resulting in an excess of powder currently being fed. The feeding amount of powder has to be reduced in the subsequent feeding stage, resulting in large fluctuations in the small flow rate feeding stage of the powder. Therefore, the present invention proposes a powder conveying device with a dynamic weighing structure. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art that when a dynamic weighing device for powder is used and a small flow rate feeding is switched in the middle of feeding the powder, an excess of powder is easily formed into blocks and falls during the low-speed pushing of the powder, and large fluctuations are easily generated when feeding the small flow rate of powder.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical solution: a powder conveying device with a dynamic weighing structure, comprising a weighing platform, a feeding assembly mounted on the upper surface of the weighing platform, a hopper suspended above the feeding assembly, a fan mounted at the bottom of the hopper, the bottom of the fan being connected to the feeding assembly via a flexible connection component, a terminal conduit fixed to the outer wall of one end of the feeding assembly, and a transition assembly mounted on the outer wall of the feeding assembly; The feeding assembly includes a metering conduit mounted on the weighing platform, one end of the metering conduit passing through a side wall fixedly connected to the terminal conduit, the outer side wall of the metering conduit located inside the terminal conduit is provided with a feeding port and a transition port that are interconnected, the metering conduit can receive powder from the hopper through a flexible connection component and feed it into the terminal conduit, the feeding assembly is connected to the transition assembly through the transition port, and a sealing plate is sealingly and slidably connected to the inner side wall of the transition port; The transition assembly includes an outer transmission tube fixedly connected to the outer wall of the metering conduit, one end of the outer transmission tube passing through and fixedly connected to the outer wall of the terminal conduit, the bottom of the other end of the outer transmission tube fixedly connected to the terminal conduit via a secondary tube, the outer transmission tube is connected to the interior of the metering conduit via a transition port, both ends of the inner side wall of the outer transmission tube are rotatably connected to a swivel, a plurality of outer spiral blades are fixedly connected between the two swivels, and a driving component is provided between the swivel and the outer wall of the metering conduit; Air compensators are installed on the outer side wall of the metering conduit located in the terminal conduit and on the top of the hopper, and a stirring device is provided inside the hopper.

[0006] In at least some embodiments, an inner dragon is provided inside the metering tube, one end of the inner dragon is fixedly connected to a reduction motor, and the reduction motor is installed at one end of the metering tube.

[0007] In at least some embodiments, the soft connection component includes a double-layer tube for connecting the fan shut-off fan and the feeding assembly, and a material receiving pipe is fixedly connected to the outer wall of one end of the metering conduit. The double-layer tube includes an outer skin and an inner skin. The outer skin is composed of several sections of skin and short metal woven cloth connected at intervals. The inner skin is anti-static fiber cloth. The inner skin is bonded to the outer skin. The two ends of the outer skin are movably connected to the fan shut-off fan and the material receiving pipe through sealing clamps. Both ends of the inner skin are equipped with docking pipes, and the docking pipes are used to be plugged into the pipe openings of the material receiving pipe and the fan shut-off fan.

[0008] In at least some embodiments, the metering conduit is located in the terminal conduit and has two isolation plates fixedly connected to its outer side wall. The isolation plates are used to separate the lower half of the metering conduit with the blanking port and the transition port from the upper half of the metering conduit. The external transmission pipe is located inside the terminal conduit and is fixedly connected to guide rods on both sides of one end thereof. Both sides of the sealing plate are slidably sleeved on the outer side wall of the guide rod. The bottom of the isolation plate is fixedly connected to a sealing tube. One end of the sealing tube passes through and is fixedly connected to the side wall of the terminal conduit. Cylinders are fixedly connected to both sides of the metering conduit. The output ends of the cylinders are sealed and slidably connected to the inside of the sealing tube. The output ends of the cylinders are fixed to the sealing plates, and the output ends of the cylinders are slidably sleeved on the outer side wall of the guide rod.

[0009] In at least some embodiments, the driving component includes a transmission gear ring, which is rotatably sleeved on a rotating ring located away from the terminal conduit, a driving motor is fixedly connected to the outer wall of the metering conduit, and a driving gear is installed on the output end of the driving motor, and the driving gear is meshed with the transmission gear ring.

[0010] In at least some embodiments, a protective shell is provided on the outer side wall of the transmission gear ring, the drive gear is rotatably connected to the inside of the protective shell, several of the outer spiral leaves are fixedly connected by connecting leaves, an inner support ring is rotatably connected to the inner side wall of the rotating ring located away from the terminal conduit, the inner support ring is fixed to the outer side wall of the metering conduit, and one end of the outer transmission tube is fixed to the inner support ring through the protective shell.

[0011] In at least some embodiments, the stirring device includes a stirring motor and a stirring support frame, the stirring support frame is installed on the top of the hopper, the stirring motor is installed on the stirring support frame, the output end of the stirring motor is connected to a stirring rod through a coupling, the bottom end of the stirring rod extends to the interior of the hopper, the stirring rod is sealed and rotatably connected to the top of the hopper, and the stirring rod is located on the rod wall inside the hopper and has several stirring blades fixedly connected.

[0012] In at least some embodiments, the weighing platform includes a weighing bracket and a support base. The upper surface of the weighing bracket is equipped with a support bracket adapted for the metering tube. The bottom of the weighing bracket is provided with three supporting feet. Weighing sensors are installed between the bottom of the supporting feet and the support base.

[0013] In at least some embodiments, the air compensator includes a detachable connecting base, the upper surface of the detachable connecting base is fixedly connected to a mounting base, the top of the mounting base is movably connected to an outer cover shell, a filter is provided inside the outer cover shell, and the filter is movably connected to the top of the mounting base.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are: 1. In the present invention, by providing a transition component, when switching to a small flow rate for feeding in the middle of feeding the powder, the sealing plate is slid to the discharge port, the transition port is opened to transfer the powder into the transition component, and the excess powder continuously fed into the transition port in the metering conduit is gradually fed into the auxiliary pipe for discharge through the rotation of the outer spiral blade in the transition component. This design can quickly respond to the switching adjustment of the small flow rate supply, and the discharge flow rate is stable, which can improve the small flow rate feeding accuracy of the powder transportation.

[0015] 2. In the present invention, the silo continuously and quantitatively discharges materials to the feeding assembly through a blower installed at the bottom, replacing the loss-in-weight scale. The blower is connected to the feeding assembly through a soft connection component. The feeding assembly is installed on the weighing platform and the silo is suspended above it. The two adopt a superior-inferior design, which can flexibly adjust the conveying direction.

[0016] 3. In the present invention, the stirring structure continuously stirs the powder in the hopper during the unloading process to avoid bridging, residue and agglomeration of the powder inside the hopper, and compensates the negative pressure inside the hopper through the air compensator during the unloading process, so that the fan can be turned off to feed stably and the unloading is smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention provides an overall three-dimensional schematic diagram of a powder conveying device with a dynamic weighing structure; Figure 2 The present invention provides a schematic diagram of the internal structure of a metering conduit and a terminal conduit in a powder conveying device with a dynamic weighing structure; Figure 3 A schematic diagram of the internal structure of the outer transmission pipe in a powder conveying device with a dynamic weighing structure proposed by the present invention; Figure 4 The present invention provides an exploded diagram of a transition component in a powder conveying device with a dynamic weighing structure; Figure 5 The present invention proposes an exploded diagram of a flexible connection component in a powder conveying device with a dynamic weighing structure; Figure 6 The present invention provides a structural schematic diagram of a stirring device in a powder conveying device with a dynamic weighing structure; Figure 7 The present invention provides a schematic diagram of the internal structure of an air compensator in a powder conveying device with a dynamic weighing structure; Figure 8 The present invention provides a structural schematic diagram of a sealing plate in a powder conveying device with a dynamic weighing structure, wherein the sealing plate slides in a drop opening and a transition opening.

[0018] Legend: 1. Hopper; 2. Stirring device; 21. Stirring motor; 22. Stirring support frame; 23. Stirring rod; 24. Stirring fan blade; 3. Turn off the fan; 4. Soft connection parts; 41. Double-layer tube; 4101. Outer tube; 4102. Inner tube; 4103. Docking tube; 42. Sealing clamp; 5. Feeding components; 51. Metering catheter; 5101. Inner dragon; 5102. Reducer motor; 52. Blanking port; 53. Transition port; 54, sealing plate; 5401, isolation plate; 5402, guide rod; 5403, sealing tube; 5404, cylinder; 55. Compensating short tube; 56. Connecting pipe; 6. Transition assembly; 61. External transmission tube; 62. Rotating ring; 63. External spiral blade; 64. Connecting blade; 65. Internal support ring; 66. Driving component; 6601. Transmission gear ring; 6602. Driving motor; 6603. Driving gear; 6604. Protective housing; 7. Terminal catheter; 71. Secondary tube; 8. Weighing platform; 81. Weighing bracket; 82. Support base; 9. Air compensator; 91. Removable connecting base; 92. Mounting base; 93. Filter; 94. Outer cover. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] Example according to Figure 1 - Figure 8 ,like Figure 1 As shown, an embodiment of the present invention provides a powder conveying device with a dynamic weighing structure, comprising a weighing platform 8, a feeding assembly 5 is installed on the upper surface of the weighing platform 8, a suspended hopper 1 is provided above the feeding assembly 5, a fan 3 is installed at the bottom of the hopper 1, and the bottom of the fan 3 is connected to the feeding assembly 5 through a flexible connection component 4. Through the flexible connection and the suspension installation of the hopper 1, the weighing of the feeding assembly 5 by the weighing platform 8 is not interfered with by the powder in the hopper 1. A terminal conduit 7 is fixed to the outer wall of one end of the feeding assembly 5, and the terminal conduit 7 is used to feed the material to the output terminal. A transition assembly 6 is installed on the outer wall of the feeding assembly 5; The feeding assembly 5 includes a metering conduit 51 mounted on the weighing platform 8, one end of the metering conduit 51 passes through the side wall of the fixedly connected terminal conduit 7, and the outer side wall of the metering conduit 51 located inside the terminal conduit 7 is provided with a discharge port 52 and a transition port 53 that are interconnected. The metering conduit 51 can receive the powder from the hopper 1 through the flexible connection component 4 and feed it into the terminal conduit 7. The feeding assembly 5 is connected to the transition assembly 6 through the transition port 53, and a sealing plate 54 is sealingly and slidably connected to the inner side wall of the transition port 53. The sealing plate 54 is slidably arranged inside the terminal conduit 7. By controlling the movement of the sealing plate 54 to control the blocking of the transition port 53 (the sealing plate 54 moves in the discharge port 52 and the transition port 53), the terminal conduit 7 and the transition assembly 6 can be selectively fed; like Figure 2 In the figure, the transition assembly 6 includes an outer transmission tube 61 fixedly connected to the outer wall of the metering conduit 51, one end of the outer transmission tube 61 passes through and is fixedly connected to the outer wall of the terminal conduit 7, the bottom of the other end of the outer transmission tube 61 is fixedly connected to the terminal conduit 7 through the auxiliary tube 71, the outer transmission tube 61 is connected to the interior of the metering conduit 51 through the transition port 53, both ends of the inner wall of the outer transmission tube 61 are rotatably connected to a swivel 62, a plurality of outer spiral blades 63 are fixedly connected between the two swivels 62, and a driving component 66 is provided between the swivel 62 and the outer wall of the metering conduit 51, the driving component 66 is used to drive the swivel 62 to drive the outer spiral blades 63 to rotate to transmit the powder inside the outer transmission tube 61; Air compensators 9 are installed on the outer side wall of the metering conduit 51 located in the terminal conduit 7 and on the top of the hopper 1 , and a stirring device 2 is provided inside the hopper 1 .

[0022] like Figure 6 In the embodiment, the stirring device 2 includes a stirring motor 21 and a stirring support frame 22, the stirring support frame 22 is installed on the top of the hopper 1, the stirring motor 21 is installed on the stirring support frame 22, the output end of the stirring motor 21 is connected to a stirring rod 23 through a coupling, the bottom end of the stirring rod 23 extends to the interior of the hopper 1, the stirring rod 23 is sealed and rotatably connected to the top of the hopper 1, the stirring rod 23 is located on the rod wall inside the hopper 1 and is fixed with a plurality of stirring blades 24, when the fan 3 feeds the powder into the metering conduit 51 at the bottom of the hopper 1, the stirring motor 21 drives the stirring blades 24 to rotate through the stirring rod 23, which can continuously stir the powder inside the hopper 1 and prevent the powder from bridging, caking, and hollowing, so that the feeding of the fan 3 is more stable; like Figure 2 In the embodiment, an inner dragon 5101 is provided inside the metering conduit 51, and a reduction motor 5102 is fixedly connected to one end of the inner dragon 5101. The reduction motor 5102 is installed at one end of the metering conduit 51; like Figure 2 and Figure 4 In the embodiment, the metering conduit 51 is located in the terminal conduit 7 and is fixedly connected to two isolation plates 5401 on its outer side wall. The isolation plates 5401 are used to separate the terminal conduit 7 into two areas (separating the lower half of the terminal conduit 7 with the blanking port 52 and the transition port 53 in the terminal conduit 7 from the upper half of the terminal conduit 7 of the metering conduit 51), and to separate the active areas of the blanking port 52, the transition port 53 and the sealing plate 54, so as to prevent the powder from rising and accumulating on the outer surface of the metering conduit 51 in the terminal conduit 7. Figure 2 In the embodiment, the outer transmission tube 61 is located at one end of the terminal conduit 7 and is fixed with a guide rod 5402 on both sides. The sealing plate 54 is slidably sleeved on the outer side wall of the guide rod 5402. Figure 4 In the figure, the bottom of the isolation plate 5401 is fixedly connected with a sealing tube 5403, one end of the sealing tube 5403 passes through the side wall of the fixed terminal conduit 7, and the two sides of the metering conduit 51 are fixedly connected with a cylinder 5404, the output end of the cylinder 5404 is sealed and slidably connected to the inside of the sealing tube 5403, the output end of the cylinder 5404 is fixedly connected to the sealing plate 54, the output end of the cylinder 5404 is slidably sleeved on the outer wall of the guide rod 5402, and the output end of the cylinder 5404 is controlled to shrink by starting the cylinder 5404, which can drive the sealing plate 54 to slide along the guide rod 5402, so that the end of the metering conduit 51 is connected to the external transmission pipe 61 through the transition port 53, and the sealing plate 54 can also be controlled to close the transition port 53, so that the metering conduit 51 is guided to the inside of the terminal conduit 7 through the drop port 52 for large-flow powder transmission.

[0023] like Figure 3 and Figure 4 In the embodiment, the driving component 66 includes a transmission gear ring 6601, which is rotatably sleeved on the rotating ring 62 away from the terminal conduit 7. A driving motor 6602 is fixedly connected to the outer wall of the metering conduit 51. A driving gear 6603 is installed on the output end of the driving motor 6602. The driving gear 6603 is meshed with the transmission gear ring 6601. When the driving motor 6602 is started, the driving gear 6603 is driven to rotate by its output end, thereby starting the driving motor 6602 to rotate synchronously in the outer transmission pipe 61, so that the rotating ring 62 drives the outer spiral blade 63 to rotate between the outer transmission pipe 61 and the metering conduit 51, thereby transmitting the powder at the transition port 53 to the auxiliary pipe 71. like Figure 3 and Figure 4In the embodiment, a protective shell 6604 is provided on the outer side wall of the transmission gear ring 6601, the driving gear 6603 is rotatably connected to the inside of the protective shell 6604, and a plurality of the outer spiral leaves 63 are fixedly connected by connecting leaves 64. An inner support ring 65 is rotatably connected to the inner side wall of the swivel 62 located away from the terminal conduit 7. The inner support ring 65 is fixedly connected to the outer side wall of the metering conduit 51 to enhance the stability of the swivel 62 during rotation. One end of the outer transmission tube 61 is fixedly connected to the inner support ring 65 through the protective shell 6604 to enhance the stability of the connection between the outer transmission tube 61 and the metering conduit 51, thereby enhancing the stability of the swivel 62 during rotation of the outer transmission tube 61. A speed encoder is installed on one end of the inner dragon 5101 and the output end of the drive motor 6602 to monitor the speed of the inner dragon 5101 and the speed of the outer spiral blade 63 in real time; like Figure 1 In the figure, the weighing platform 8 includes a weighing bracket 81 and a supporting base 82. A supporting frame adapted to the metering tube 51 is installed on the upper surface of the weighing bracket 81. Three supporting feet are provided at the bottom of the weighing bracket 81. A weighing sensor is installed between the bottom of the supporting feet and the supporting base 82. like Figure 7 In the embodiment, the air compensator 9 includes a detachable connecting base 91, the upper surface of the detachable connecting base 91 is fixedly connected with a mounting base 92, the top of the mounting base 92 is movably connected with an outer cover shell 94, a filter 93 is provided inside the outer cover shell 94, and the filter 93 is movably connected to the top of the mounting base 92. When the fan 3 is turned off and continuously feeds powder into the metering conduit 51 at the bottom of the hopper 1, when negative pressure occurs in the upper layer of the powder inside the hopper 1, the outside air enters the interior through the upper air hole on the outer cover shell 94, and after being filtered by the filter 93, enters the hopper 1 through the mounting base 92 and the detachable connecting base 91, and compensates the air in the hopper 1 to balance the internal air pressure of the hopper 1. Similarly, the air compensator 9 installed on the compensation short pipe 55 can compensate the air in the metering conduit 51. like Figure 1 and Figure 5 In the embodiment, the flexible connection component 4 includes a double-layer tube 41 for connecting the fan 3 and the feeding assembly 5. A material receiving tube 56 is fixedly connected to the outer wall of one end of the metering conduit 51. The double-layer tube 41 includes an outer skin 4101 and an inner skin 4102. The outer skin 4101 is composed of several sections of skin and short metal braided cloth connected at intervals, which stably supports the shape of the transmission pipeline and ensures smooth flow of powder. Figure 5The middle skin is arranged in sections, and the outer shape is an annular hollow drum shape. Each section of the skin is connected by a short metal woven cloth to prevent the fan 3 from interfering with the quality monitoring data of the weighing platform 8 when it is connected to the material receiving pipe 56 through the outer skin 4101. The inner skin 4102 is anti-static fiber cloth, and the inside of the inner skin 4102 is smooth, which can reduce the adhesion and residue of powder. The inner skin 4102 is bonded to the outer skin 4101, and the two ends of the outer skin 4101 are movably connected to the fan 3 and the material receiving pipe 56 through sealing clamps 42. Both ends of the inner skin 4102 are equipped with docking pipes 4103, which are used to be inserted into the pipe mouths of the material receiving pipe 56 and the fan 3 to prevent powder from entering the gap between the outer skin 4101 and the inner skin 4102.

[0024] In this embodiment, the feeding component 5 is placed on the weighing platform 8 to monitor mass changes. The powder inside the hopper 1 is quantitatively fed into the flexible connection component 4 through the fan 3, and the powder is fed into the metering conduit 51 through the flexible connection component 4 and the material receiving pipe 56. The weight data is monitored in real time by the weighing sensor at the bottom of the weighing bracket 81, and the flow rate of the inner dragon 5101 feeding the material into the terminal conduit 7 through the drop port 52 is controlled. In the process of feeding the material into the terminal conduit 7 according to the set feeding plan, the speed encoder installed at one end of the inner dragon 5101 monitors the speed of the inner dragon 5101 in real time. The feeding flow rate can be adjusted by adjusting the feeding amount of the fan 3 and the speed of the reduction motor 5102. When switching to small-flow powder feeding during feeding, the sealing plate 54 is controlled to slide toward the inside of the drop port 52 to open the transition port 53. The powder fed in the metering conduit 51 enters between the metering conduit 51 and the outer transmission pipe 61 through the transition port 53. The outer spiral blade 63 is controlled by the driving component 66 to rotate between the outer transmission pipe 61 and the metering conduit 51. Under the action of the transmission of the outer spiral blade 63, the powder is transmitted to the auxiliary pipe 71 connected to the bottom of the other end of the outer transmission pipe 61, and the powder in the transition port 53 is gradually transferred from the bottom layer. The powder inside the metering conduit 51 is transmitted in portions, and the speed encoder installed on the output shaft of the drive motor 6602 is used to monitor the rotation speed of the outer spiral blade 63 in real time to avoid frequent overfeeding and large feeding fluctuations, thereby achieving stable small-flow feeding.

[0025] It is worth noting that in the initial stage of implementing the feeding plan, the transition port 53 can be opened in advance, and the powder can be filled into the external transmission pipe 61 in advance through the outer spiral blade 63 to near the connection with the auxiliary pipe 71, which can further accelerate the response speed of small flow powder feeding.

[0026] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other form. Any person skilled in the art may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A powder conveying device with a dynamic weighing structure, comprising a weighing platform (8), characterized in that: A feeding assembly (5) is installed on the upper surface of the weighing platform (8), a hopper (1) is suspended above the feeding assembly (5), a fan (3) is installed at the bottom of the hopper (1), the bottom of the fan (3) is connected to the feeding assembly (5) through a soft connection component (4), a terminal conduit (7) is fixed to the outer wall of one end of the feeding assembly (5), and a transition assembly (6) is installed on the outer wall of the feeding assembly (5); The feeding assembly (5) includes a metering conduit (51) mounted on the weighing platform (8), one end of the metering conduit (51) passes through the side wall of the fixedly connected terminal conduit (7), and the metering conduit (51) is provided with a feeding port (52) and a transition port (53) that are interconnected on the outer side wall of the terminal conduit (7). The metering conduit (51) can receive powder from the hopper (1) through the soft connection component (4) and deliver it to the terminal conduit (7). The feeding assembly (5) is connected to the transition assembly (6) through the transition port (53), and a sealing plate (54) is sealingly and slidably connected to the inner side wall of the transition port (53); The transition assembly (6) includes an outer transmission tube (61) fixedly connected to the outer side wall of the metering conduit (51), one end of the outer transmission tube (61) passes through and is fixedly connected to the outer side wall of the terminal conduit (7), the bottom of the other end of the outer transmission tube (61) is fixedly connected to the terminal conduit (7) through the auxiliary tube (71), the outer transmission tube (61) is connected to the interior of the metering conduit (51) through the transition port (53), both ends of the inner side wall of the outer transmission tube (61) are rotatably connected to a rotating ring (62), a plurality of outer spiral leaves (63) are fixedly connected between the two rotating rings (62), and a driving component (66) is provided between the rotating ring (62) and the outer side wall of the metering conduit (51); Air compensators (9) are installed on the outer side wall of the metering conduit (51) located in the terminal conduit (7) and on the top of the hopper (1). A stirring device (2) is provided inside the hopper (1).

2. The powder conveying device with a dynamic weighing structure according to claim 1, characterized in that: An inner dragon (5101) is provided inside the metering conduit (51), one end of the inner dragon (5101) is fixedly connected to a reduction motor (5102), and the reduction motor (5102) is installed at one end of the metering conduit (51).

3. The powder conveying device with a dynamic weighing structure according to claim 1, characterized in that: The soft connection component (4) includes a double-layer tube (41) for connecting the fan (3) and the feeding assembly (5), and a material receiving tube (56) is fixedly connected to the outer wall of one end of the metering conduit (51). The double-layer tube (41) includes an outer skin (4101) and an inner skin (4102). The outer skin (4101) is composed of a plurality of sections of skin and short metal braided cloths connected at intervals. The inner skin (4102) is an anti-static fiber cloth. The inner skin (4102) is bonded to the outer skin (4101). The two ends of the outer skin (4101) are movably connected to the fan (3) and the material receiving tube (56) through a sealing clamp (42). Both ends of the inner skin (4102) are equipped with a docking plug (4103), and the docking plug (4103) is used to be plugged into the material receiving tube (56) and the pipe opening of the fan (3).

4. The powder conveying device with a dynamic weighing structure according to claim 1, characterized in that: The metering conduit (51) is located in the terminal conduit (7) and is fixedly connected to two isolation plates (5401) on its outer side wall. The isolation plates (5401) are used to separate the lower half of the metering conduit (51) with the blanking port (52) and the transition port (53) from the upper half of the metering conduit (51) in the terminal conduit (7). The outer transmission pipe (61) is located in the terminal conduit (7) and is fixedly connected to the guide rod (5402) on both sides of one end thereof. Both sides of the sealing plate (54) are slidably sleeved on the outer side wall of the guide rod (5402). The bottom of the isolation plate (5401) is fixedly connected with a sealing tube (5403), one end of the sealing tube (5403) passes through the side wall of the fixed terminal conduit (7), and both sides of the metering conduit (51) are fixedly connected with a cylinder (5404), the output end of the cylinder (5404) is sealed and slidably connected to the inside of the sealing tube (5403), the output end of the cylinder (5404) is fixedly connected to the sealing plate (54), and the output end of the cylinder (5404) is slidably sleeved on the outer wall of the guide rod (5402).

5. The powder conveying device with a dynamic weighing structure according to claim 1, characterized in that: The driving component (66) includes a transmission gear ring (6601), which is rotatably sleeved on a rotating ring (62) located away from the terminal conduit (7). A driving motor (6602) is fixedly connected to the outer wall of the metering conduit (51), and a driving gear (6603) is installed on the output end of the driving motor (6602). The driving gear (6603) is meshed with the transmission gear ring (6601).

6. The powder conveying device with a dynamic weighing structure according to claim 5, characterized in that: A protective shell (6604) is provided on the outer wall of the transmission gear ring (6601), the driving gear (6603) is rotatably connected to the inside of the protective shell (6604), a plurality of the outer spiral leaves (63) are fixedly connected via connecting leaves (64), an inner support ring (65) is rotatably connected to the inner wall of the rotating ring (62) located away from the terminal conduit (7), the inner support ring (65) is fixedly connected to the outer wall of the metering conduit (51), and one end of the outer transmission tube (61) is fixedly connected to the inner support ring (65) via the protective shell (6604).

7. The powder conveying device with a dynamic weighing structure according to claim 1, characterized in that: The stirring device (2) comprises a stirring motor (21) and a stirring support frame (22), wherein the stirring support frame (22) is mounted on the top of the hopper (1), and the stirring motor (21) is mounted on the stirring support frame (22). The output end of the stirring motor (21) is connected to a stirring rod (23) via a coupling, and the bottom end of the stirring rod (23) extends into the interior of the hopper (1). The stirring rod (23) is rotatably connected to the top of the hopper (1), and a plurality of stirring blades (24) are fixedly connected to the rod wall of the stirring rod (23) located inside the hopper (1).

8. The powder conveying device with a dynamic weighing structure according to claim 1, characterized in that: The weighing platform (8) includes a weighing bracket (81) and a supporting base (82). A supporting bracket adapted for the metering tube (51) is installed on the upper surface of the weighing bracket (81). Three supporting feet are provided at the bottom of the weighing bracket (81). Weighing sensors are installed between the bottoms of the supporting feet and the supporting base (82).

9. The powder conveying device with a dynamic weighing structure according to claim 1, characterized in that: The air compensator (9) includes a detachable connecting base (91), the upper surface of the detachable connecting base (91) is fixedly connected to a mounting base (92), the top of the mounting base (92) is movably connected to an outer cover shell (94), the interior of the outer cover shell (94) is provided with a filter (93), and the filter (93) is movably connected to the top of the mounting base (92).

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