Automatic feeding powder delivery mechanism

Abstract

The present invention discloses an automatic feeding and powder delivery mechanism, including: a large hopper, which is arranged on a fixed platform and is provided with a feed port and a discharge port; a first pneumatic blade valve, which is connected to the discharge port of the large hopper; a small hopper, which is located directly below the discharge end of the first pneumatic blade valve; a second pneumatic blade valve, which is connected to the discharge end of the small hopper; a translation drive assembly, which is connected to the fixed platform through a fixed frame; a weighing device, which is arranged on the moving end of the translation drive assembly, and the small hopper is fixed on the weighing device; a rotary discharge valve, which is connected to the discharge end of the second pneumatic blade valve; a guide pipe, which is arranged obliquely and is connected to the discharge end of the rotary discharge valve; a retaining ring assembly, which is connected to the discharge end of the guide pipe. The present invention can significantly reduce manpower and meet the assembly line operation of the production line, and is superior to manual operation in terms of efficiency and precision.

Description

Technical Field

[0001] The present invention relates to the technical field of powder sintering, and more specifically, to an automatic feeding and powder delivery mechanism. Background Art

[0002] At present, in the manufacturing process of powder sintered filter elements, the powder needs to be filled into the mold first, and then pressed and sintered. In the existing technology, the powder is poured into the mold manually, which is inefficient and has disadvantages such as metering errors, and cannot be incorporated into the automated production line. Summary of the invention

[0003] An object of the present invention is to provide an automatic feeding and powder delivery mechanism, which can significantly reduce manpower and meet the assembly line operation of the production line, achieving a technical effect that is superior to manual operation in terms of efficiency and accuracy.

[0004] In order to achieve these purposes and other advantages according to the present invention, an automatic feeding powder delivery mechanism is provided, comprising:

[0005] A large hopper is arranged on a fixed platform and is provided with a feed inlet and a discharge outlet;

[0006] A first pneumatic blade valve, the feed end of which is connected to the discharge port of the large hopper;

[0007] A small hopper, the feed end of which is located directly below the discharge end of the first pneumatic blade valve;

[0008] A second pneumatic blade valve, which is connected to the discharge end of the small hopper;

[0009] A translation drive assembly connected to the fixed platform via a fixed frame;

[0010] A weighing device, which is arranged on the moving end of the translation drive assembly, and the small hopper is fixed on the weighing device;

[0011] A rotary discharge valve, the feed end of which is connected to the discharge end of the second pneumatic blade valve, and the rotary discharge valve is driven by a servo motor;

[0012] A material guide pipe is arranged obliquely, and a feed end of the material guide pipe is connected with a discharge end of the rotary discharge valve;

[0013] The feed end of the retaining ring assembly is connected with the discharge end of the guide pipe.

[0014] Preferably, the large hopper includes a cylindrical body supported and fixed on the fixed platform, an oblique conical body fixed and connected to the lower end of the cylindrical body, and a top cover with a sealed and removable cover on the top of the cylindrical body, wherein a mounting hole is provided on the fixed platform, the oblique conical body is passed through the mounting hole, and the feed port is provided on the top cover.

[0015] Preferably, the small hopper is in the shape of an oblique cone, and the end of the small hopper with a larger open area is arranged upward.

[0016] Preferably, the translation drive assembly comprises:

[0017] A pair of sliding rails, the pair of sliding rails are arranged in parallel and at intervals, a slider is arranged on the sliding rail, a mounting platform is arranged on the slider, wherein the weighing device is arranged on the mounting platform, and the lower end of the small hopper moves through the gap between the mounting platform and the pair of sliding rails in sequence;

[0018] The first electric cylinder has a fixed seat fixed to a pair of sliding guide rails, and the piston rod of the first electric cylinder is fixed to the mounting platform.

[0019] Preferably, the weighing device comprises four gravity sensors mounted on the mounting platform and a flat plate fixed on the four gravity sensors, wherein the flat plate is provided with through holes, and the small hopper is fixed on the flat plate.

[0020] Preferably, the retaining ring assembly comprises:

[0021] A material blocking tube is arranged vertically in the axial direction, and comprises a fixed arc tube whose side wall is connected and fixed to the discharge end of the material guide tube, and a movable arc tube movably enclosed with the fixed arc tube, wherein a convex plate is arranged on the outer wall of the movable arc tube, and a first axial hole and a second axial hole are spaced apart on the convex plate;

[0022] A mounting seat, which is fixed on the material guide tube, a first pin shaft is vertically fixed on the mounting seat, and the first pin shaft is rotatably inserted into the first shaft hole;

[0023] A crank connecting rod, both ends of which are provided with shaft holes, a second pin shaft is rotatably passed through the shaft hole at one end of the crank connecting rod, and the other end of the second pin shaft is rotatably passed through the second shaft hole;

[0024] A second electric cylinder is mounted on the mounting seat, a piston rod of the second electric cylinder is horizontally arranged, a connecting block is arranged on the piston rod of the second electric cylinder, a third pin is fixed on the connecting block, and the third pin is rotatably inserted into the shaft hole at the other end of the crank connecting rod;

[0025] Wherein, when the piston rod of the second electric cylinder extends outward to a certain distance, the movable arc-shaped tube rotates toward the fixed arc-shaped tube to be in an enclosed state;

[0026] When the piston rod of the second electric cylinder retracts inwardly to a certain distance, the movable arc-shaped tube rotates away from the fixed arc-shaped tube to be in an expanded state.

[0027] Preferably, it further comprises a first connecting plate, the upper end of which is fixed to the mounting platform, the second pneumatic blade valve is fixed to the connecting plate via a first connecting frame, and the rotary discharge valve is fixed to the first connecting plate via a second connecting frame.

[0028] Preferably, the first connecting plate is provided with at least one connecting hole;

[0029] The automatic feeding and powder delivery mechanism also includes:

[0030] A second connecting plate, the upper end of which is provided with a waist-shaped hole, the second connecting plate is fixed to the connecting hole by bolts and nuts, the lower end of the second connecting plate is in an inclined shape adapted to the material guide tube, and the second connecting plate is provided with a plurality of fixing holes;

[0031] A plurality of U-shaped pipe clamps are arranged on the outer wall of the material guide pipe at intervals and fixed with a plurality of fixing holes through nuts.

[0032] Preferably, both the top cover and the cylindrical body are provided with visual windows; a sealing gasket is provided at the gap between the top cover and the cylindrical body, and the top cover is detachably fixed to the cylindrical body by a plurality of locking buckles.

[0033] The present invention has at least the following beneficial effects:

[0034] First, the large hopper of the present invention adopts a closed design, and the powder is transported in a closed manner. Whether it is vacuum transportation or gas transportation, it is convenient and practical and is not easy to cause environmental pollution.

[0035] Second, the present invention combines a large hopper with a small hopper. The large hopper can store more materials, and the small hopper only carries the powder required for each product. In the drive of the small hopper, the load of the motor (when the translation drive assembly is driven by an electric cylinder, it refers to the motor in the first electric cylinder) is significantly reduced, which saves energy and allows for rapid loading.

[0036] Third, the small hopper of the present invention is equipped with a weighing sensor (gravity sensor) to ensure the accuracy of the powder feeding weight. In a high-speed, dynamic industrial automatic production line, it is necessary to maintain the stability and accuracy of the powder feeding weight.

[0037] Fourthly, the present invention adopts a pneumatic blade valve to control the opening and closing of the powder, which has a simple structure, fast control speed, safety and explosion-proof, and is easy to control.

[0038] Fifth, the present invention adopts a rotary discharge valve, which relies on servo motor control and can accurately control the opening of the pneumatic blade valve flap, and control the powder delivery flow rate according to the production rhythm.

[0039] Sixth, the retaining ring assembly of the present invention adopts a crank connecting rod to realize opening and closing, and the price is cheap. Since the powder material is sticky, when the material guide pipe needs to be cleaned, the retaining ring assembly can be opened for easy cleaning.

[0040] Seventh, the present invention can be incorporated into product assembly line production, with automatic control, which is convenient, accurate and fast, thus improving production efficiency and reducing product costs.

[0041] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the overall structure of the automatic feeding and powder delivery mechanism according to one of the technical solutions of the present invention;

[0043] Figure 2 A detailed view of the large hopper according to one of the technical solutions of the present invention;

[0044] Figure 3 A detailed view of the small hopper and the translation drive assembly according to one of the technical solutions of the present invention;

[0045] Figure 4 A detailed installation diagram of the second pneumatic blade valve, the rotary discharge valve and the guide pipe according to one of the technical solutions of the present invention;

[0046] Figure 5 This is a detailed view of the retaining ring assembly according to one of the technical solutions of the present invention.

[0047] Explanation of the numbers in the drawings in the specification: fixed platform 100, large hopper 200, small hopper 300, translation drive assembly 400, weighing machine 500, retaining ring assembly 600, first pneumatic blade valve 1, U-shaped pipe clamp 2, second pneumatic blade valve 3, rotary unloading valve 4, material guide pipe 5, feed pipe 6, first connecting plate 7, first connecting frame 8, second connecting frame 9, second connecting plate 10, waist-shaped hole 11, cylindrical barrel 21, oblique conical barrel 22, top cover 23, visual window 24, fixed frame 25, sliding guide rail 41, slider 42, mounting platform 43, first electric cylinder 44, gravity sensor 51, flat plate 52, material retaining pipe 61, fixed arc tube 62, movable arc tube 63, convex plate 64, mounting seat 65, first pin shaft 66, crank connecting rod 67, second pin shaft 68, second electric cylinder 69, connecting block 60. DETAILED DESCRIPTION

[0048] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0049] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does 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 invention.

[0050] like Figures 1 to 5 As shown, the present invention provides an automatic feeding and powder delivery mechanism, comprising:

[0051] The large hopper 200 is arranged on a fixed platform 100, and is provided with a feed port and a discharge port. The feed port is used to be sealed with the feed pipe 6, and the powder can enter the large hopper 200 through the feed port from the feed pipe 6. When the material needs to be discharged, it can be discharged from the discharge port. The large hopper 200 is used to load more powder at one time for the production of powder sintered filter element products.

[0052] The first pneumatic blade valve 1, whose feeding end is connected to the discharge port of the large hopper 200; the first pneumatic blade valve 1 is used to control the opening and closing between the large hopper 200 and the small hopper 300, and control the amount and speed of the powder from the large hopper 200 into the small hopper 300. The pneumatic blade valve is used, and its principle is to deliver compressed air to the pneumatic blade valve through a pipeline connected to the air source, and send a control signal to the pneumatic blade valve through a controller or a manual operating device. According to the control signal, the valve core of the pneumatic blade valve will make corresponding movements to control the flow of gas. In the design, a pressure difference regulating device can be set to control the movement speed and position of the valve core to achieve different degrees of control such as opening, closing and partial opening of the valve. It has the advantages of simple structure, convenient operation, good sealing, etc. Under the action of the first pneumatic blade valve 1, the powder can be discharged from the large hopper 200 under controlled conditions.

[0053] The feeding end of the small hopper 300 is located directly below the discharging end of the first pneumatic blade valve 1 ; the powder material discharged from the large hopper 200 enters the small hopper 300 in a balanced and controlled manner.

[0054] The second pneumatic blade valve 3 is connected to the discharge end of the small hopper 300 ; the second pneumatic blade valve 3 is used to control the discharge speed of the powder in the small hopper 300 .

[0055] The translation drive assembly 400 is connected to the fixed platform 100 through the fixed frame 25; because there are many mechanisms such as a vibration plate, a fixed plug, and a bag under the filter element mold, it cannot be directly moved to the bottom of the small hopper 300, and there is a certain deviation distance, so it is set to move the small hopper 300 a certain distance, remove the filter element mold after filling once, and then fill the next filter element mold. In addition, in the process of realizing automated production, a video detection tool can be used to detect whether the outlet position of the powder in the small hopper 300 is aligned with the filter element mold, so that the powder can be accurately introduced into the filter element mold. During this alignment process, the translation drive assembly 400 can be relied on to adjust the position of the small hopper 300. The specific structure of the translation drive assembly 400 is described in detail later.

[0056] The weighing device 500 is arranged on the moving end of the translation drive assembly 400, and the small hopper 300 is passed through and fixed on the weighing device 500; when the second pneumatic blade valve 3 is in a closed state and the first pneumatic blade valve 1 is opened, the weighing device 500 synchronously measures the weight of the powder entering into the small hopper 300. When the preset weight value is reached, the first pneumatic blade valve 1 is closed. The preset weight value is the amount used to produce a powder sintered filter element once.

[0057] The rotary discharge valve 4, whose feed end is connected to the discharge end of the second pneumatic blade valve 3, is driven by a servo motor; the rotary discharge valve 4 is used to control the discharge speed of the small hopper 300. The rotary discharge valve 4 is used, and the rotary discharge valve 4 quantitatively discharges the material through a rotating impeller. The rotary discharge valve 4 is suitable for pneumatic conveying systems, and can feed materials evenly and continuously to ensure that the gas and solid in the pneumatic output pipe are relatively stable, so that the pneumatic conveying can work normally. At the same time, it can also isolate the upper and lower air pressures of the discharger to play a role in locking air. When the powder is unloaded at a too fast and uneven speed, the unloading of the powder is buffered and stabilized by controlling the impeller of the rotary discharge valve 4. The rotary discharge valve 4 is controlled by a servo motor, and the unloading is more stable and accurate, which is convenient for automatic beat control of the production line.

[0058] The guide pipe 5 is arranged in an inclined manner, and the feed end of the guide pipe 5 is connected to the discharge end of the rotary discharge valve 4; the guide pipe 5 is used to guide the powder in the small hopper 300 to the filter element mold. The guide pipe 5 is arranged in an inclined shape, which helps the powder to roll down and be easily identified by the video detection tool during the movement of the small hopper 300, so as to facilitate the discharge of the powder to the filter element mold.

[0059] The retaining ring assembly 600 has a feeding end connected to the discharging end of the material guide pipe 5. The retaining ring assembly 600 is used to make the powder fall vertically into the filter element mold to prevent it from sliding out of the filter element mold under the tilt potential energy of the material guide pipe 5; secondly, when the material guide pipe 5 is blocked, the retaining ring assembly 600 can be opened to clear the material guide pipe 5. The specific structure of the retaining ring assembly 600 will be described in detail later.

[0060] In the above technical solution, through the coordinated setting of the large hopper 200 and the small hopper 300, the large hopper 200 can store more materials, and the small hopper 300 only carries the powder required for each product. In the drive of the small hopper 300, the load of the motor (when the translation drive assembly 400 is driven by an electric cylinder, it refers to the motor in the first electric cylinder 44) is significantly reduced, which saves energy and can be quickly loaded. Through the coordinated setting of the first pneumatic blade valve 1, the second pneumatic blade valve 3 and the weighing device 500, the weight of the powder can be accurately controlled. Through the coordinated setting of the second pneumatic blade valve 3, the translation drive assembly 400, the rotary discharge valve 4, the guide pipe 5 and the retaining ring assembly 600, the powder can be fed into the filter element mold evenly and continuously. The feeding efficiency and feeding accuracy are significantly improved, and the entire automatic feeding and powder delivery mechanism provides an equipment foundation for incorporating into the product assembly line production.

[0061] In another technical solution, the large hopper 200 includes a cylindrical body 21 supported and fixed on the fixed platform 100, an oblique conical body 22 fixed and connected to the lower end of the cylindrical body 21, and a top cover 23 sealed and removable cover on the top of the cylindrical body 21, wherein a mounting hole is opened on the fixed platform 100, the oblique conical body 22 is passed through the mounting hole, and the feed port is opened on the top cover 23.

[0062] In the above technical scheme, the cylindrical barrel 21 can carry more powder, and the oblique conical barrel 22 can prevent the powder from gathering in the large hopper 200, which is convenient for powder discharge. The side wall of the cylindrical barrel 21 and the top cover 23 are both provided with a visual window 24, which is convenient for observing the powder situation at any time. The top cover 23 is set as a quick-open structure. Preferably, a sealing gasket is provided at the gap between the top cover 23 and the cylindrical barrel 21, and the top cover 23 is detachably fixed to the cylindrical barrel 21 through a plurality of locks. The closed conveying of powder, whether it is vacuum conveying or gas conveying, is convenient and practical, and is not easy to cause environmental pollution. Preferably, the oblique conical barrel 22 has a right-angle side on one side and an inclined side on the other side, which is not only convenient for the powder to roll down, but also due to the asymmetric structure, the powder is not subjected to consistent force, and it is not easy to accumulate and clog on the oblique cone.

[0063] In another technical solution, the small hopper 300 is in the shape of an oblique cone, and the end of the small hopper 300 with a larger open area is arranged upwards so as to receive the powder more stably. The oblique cone shape of the small hopper 300 can prevent the powder from gathering in the small hopper 300, and facilitate the powder discharge. The volume of the small hopper 300 is designed to be slightly larger than the mass required for the product. Preferably, one side of the oblique cone is a right-angled side and the other side is an inclined side, which not only facilitates the powder to roll down, but also has a material blocking function on one side of the right-angled side.

[0064] In another technical solution, a preferred translation drive assembly 400 is provided, and the translation drive assembly 400 includes:

[0065] A pair of sliding rails 41, the pair of sliding rails 41 are arranged at intervals and in parallel, a slider 42 is provided on the sliding rail 41, and a mounting platform 43 is provided on the slider 42, wherein the weighing device 500 is arranged on the mounting platform 43, and the lower end of the small hopper 300 moves in turn through the gap between the mounting platform 43 and the pair of sliding rails 41; when the slider 42 slides along the sliding rail 41, it can drive the mounting platform 43 to slide, thereby driving the weighing device 500 to slide, thereby driving the small hopper 300 to slide.

[0066] The first electric cylinder 44 has a fixed seat fixed to a pair of sliding guide rails 41 , and a piston rod of the first electric cylinder 44 is fixed to the mounting platform 43 .

[0067] In the above technical solution, the first electric cylinder 44 is started, and the piston rod of the first electric cylinder 44 drives the mounting platform 43 to move along the direction limited by the sliding guide rail 41, and drives the weighing device 500 and the small hopper 300 to move in turn, so as to complete the operation of aligning the discharge material with the filter element mold. The large hopper 200 and the first pneumatic blade valve 1 do not move.

[0068] In another technical solution, the weighing device 500 includes four gravity sensors 51 installed on the mounting platform 43 and a flat plate 52 installed on the four gravity sensors 51, wherein a through hole is opened on the flat plate 52, and the small hopper 300 is fixed on the flat plate 52 and passes through the through hole.

[0069] In the above technical solution, the gravity sensor 51 is used to weigh the powder, which has a very fast response speed, can detect the weight change of the object in real time, provide timely feedback information, and can accurately measure the tiny gravity changes of the powder to meet high-precision requirements.

[0070] In another technical solution, the retaining ring assembly 600 includes:

[0071] The material blocking tube 61 is vertically arranged in the axial direction. The material blocking tube 61 includes a fixed arc tube 62 whose side wall is connected and fixed to the discharge end of the material guide tube 5, and a movable arc tube 63 that is movably enclosed with the fixed arc tube 62, wherein a convex plate 64 is provided on the outer wall of the movable arc tube 63, and a first axial hole and a second axial hole are provided on the convex plate 64 at intervals; when the fixed arc tube 62 and the movable arc tube 63 are enclosed together to form the material blocking tube 61, the powder directly enters the material blocking tube 61 from the lower end of the material guide tube 5, and then falls vertically into the filter element mold from the bottom of the material blocking tube 61. When a blockage occurs in the material guide tube 5, the fixed arc tube 62 and the movable arc tube 63 are unfolded to expose the discharge end of the material guide tube 5, so that the staff can clean the material guide tube 5.

[0072] The mounting seat 65 is fixed on the material guide tube 5, and a first pin shaft 66 is vertically fixed on the mounting seat 65. The first pin shaft 66 is rotatably penetrated through the first shaft hole; the convex plate 64 can rotate around the first pin shaft 66 as the axis, thereby driving the movable arc tube 63 and the fixed arc tube 62 to form two states of enclosed and expanded.

[0073] The crank connecting rod 67 has axial holes at both ends. A second pin shaft 68 is rotatably penetrated through the axial hole at one end of the crank connecting rod 67, and the other end of the second pin shaft 68 is rotatably penetrated through the second axial hole. The crank connecting rod 67 is used to pull the movable arc tube 63. The crank connecting rod 67 drives the second pin shaft 68 to rotate around the first pin shaft 66, thereby pulling the movable arc tube 63.

[0074] The second electric cylinder 69 is installed on the mounting seat 65. The piston rod of the second electric cylinder 69 is horizontally arranged and forms a horizontal angle with the crank connecting rod 67. A connecting block 60 is arranged on the piston rod of the second electric cylinder 69. A third pin is fixed on the connecting block 60. The third pin is rotatably penetrated through the axial hole at the other end of the crank connecting rod 67. The second electric cylinder 69 is used to provide power for the crank connecting rod 67. The piston rod of the second electric cylinder 69 drives the connecting block 60 to move horizontally, and drives the crank connecting rod 67 to move horizontally and rotate.

[0075] When the piston rod of the second electric cylinder 69 extends outward to a certain distance, the movable arc tube 63 rotates toward the fixed arc tube 62 to be in an enclosed state;

[0076] When the piston rod of the second electric cylinder 69 retracts inward to a certain distance, the movable arc-shaped tube 63 rotates away from the fixed arc-shaped tube 62 to be in an expanded state.

[0077] In the above technical solution, by setting a fixed arc tube 62, a movable arc tube 63, a crank connecting rod 67 and a second electric cylinder 69, the powder can be made to fall vertically into the filter element mold to avoid sliding out of the filter element mold under the tilt potential energy of the guide tube 5; and because the powder is sticky, when the guide tube 5 needs to be cleaned, it can be opened for easy cleaning.

[0078] In another technical solution, it also includes:

[0079] A first connecting plate 7, the upper end of which is fixed to the mounting platform 43;

[0080] a first connecting frame 8, through which the second pneumatic blade valve 3 is fixed to the first connecting plate 7;

[0081] The second connecting frame 9 , the rotary discharge valve 4 is fixed to the first connecting plate 7 via the second connecting frame 9 .

[0082] The second pneumatic blade valve 3 and the rotary discharge valve 4 can be stably installed by disposing the first connecting frame 8 and the second connecting frame 9 .

[0083] In another technical solution, the first connecting plate 7 is provided with at least one connecting hole;

[0084] The automatic feeding and powder delivery mechanism also includes:

[0085] The second connecting plate 10 has a waist-shaped hole 11 at its upper end. The second connecting plate 10 is fixed to the first connecting plate 7 through the waist-shaped hole 11 by bolts and nuts. The lower end of the second connecting plate 10 is inclined to match the material guide tube 5. The second connecting plate 10 is provided with a plurality of fixing holes. Through the arrangement of the second connecting plate 10 and the waist-shaped hole 11, the height of the second connecting plate 10 can be adjusted to adapt to the feeding of filter element molds of different heights.

[0086] A plurality of U-shaped pipe clamps 2 are arranged at intervals on the outer wall of the guide pipe 5 and fixed to the plurality of fixing holes by nuts. The U-shaped pipe clamps 2 and the second connecting plate 10 can make the guide pipe 5 more stably installed and reduce shaking.

[0087] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. Automatic feeding powder delivery mechanism, characterized in that: include: A large hopper is arranged on a fixed platform and is provided with a feed inlet and a discharge outlet; A first pneumatic blade valve, the feed end of which is connected to the discharge port of the large hopper; A small hopper, the feed end of which is located directly below the discharge end of the first pneumatic blade valve; A second pneumatic blade valve, which is connected to the discharge end of the small hopper; A translation drive assembly connected to the fixed platform via a fixed frame; A weighing device, which is arranged on the moving end of the translation drive assembly, and the small hopper is fixed on the weighing device; A rotary discharge valve, the feed end of which is connected to the discharge end of the second pneumatic blade valve, and the rotary discharge valve is driven by a servo motor; A material guide pipe is arranged obliquely, and a feed end of the material guide pipe is connected with a discharge end of the rotary discharge valve; A retaining ring assembly, the feed end of which is connected to the discharge end of the guide pipe; Wherein, the retaining ring assembly comprises: A material blocking tube is arranged vertically in the axial direction, and comprises a fixed arc tube whose side wall is connected and fixed to the discharge end of the material guide tube, and a movable arc tube movably enclosed with the fixed arc tube, wherein a convex plate is arranged on the outer wall of the movable arc tube, and a first axial hole and a second axial hole are spaced apart on the convex plate; A mounting seat, which is fixed on the material guide tube, a first pin shaft is vertically fixed on the mounting seat, and the first pin shaft is rotatably inserted into the first shaft hole; A crank connecting rod, both ends of which are provided with shaft holes, a second pin shaft is rotatably passed through the shaft hole at one end of the crank connecting rod, and the other end of the second pin shaft is rotatably passed through the second shaft hole; A second electric cylinder is mounted on the mounting seat, a piston rod of the second electric cylinder is horizontally arranged, a connecting block is arranged on the piston rod of the second electric cylinder, a third pin is fixed on the connecting block, and the third pin is rotatably inserted into the shaft hole at the other end of the crank connecting rod; Wherein, when the piston rod of the second electric cylinder extends outward to a certain distance, the movable arc-shaped tube rotates toward the fixed arc-shaped tube to be in an enclosed state; When the piston rod of the second electric cylinder retracts inwardly to a certain distance, the movable arc-shaped tube rotates away from the fixed arc-shaped tube to be in an expanded state.

2. The automatic feeding and powder delivery mechanism according to claim 1, characterized in that: The large hopper includes a cylindrical body supported and fixed on the fixed platform, an oblique conical body fixed and connected to the lower end of the cylindrical body, and a top cover that is sealed and detachably arranged on the top of the cylindrical body, wherein a mounting hole is opened on the fixed platform, the oblique conical body is inserted into the mounting hole, and the feed port is opened on the top cover.

3. The automatic feeding and powder delivery mechanism according to claim 1, characterized in that: The small hopper is in the shape of an oblique cone, and the end of the small hopper with a larger open area is arranged upward.

4. The automatic feeding and powder delivery mechanism according to claim 1, characterized in that: The translation drive assembly comprises: A pair of sliding rails, the pair of sliding rails are arranged in parallel and at intervals, a slider is arranged on the sliding rail, a mounting platform is arranged on the slider, wherein the weighing device is arranged on the mounting platform, and the lower end of the small hopper moves through the gap between the mounting platform and the pair of sliding rails in sequence; The first electric cylinder has a fixed seat fixed to a pair of sliding guide rails, and the piston rod of the first electric cylinder is fixed to the mounting platform.

5. The automatic feeding and powder delivery mechanism according to claim 4, characterized in that: The weighing device comprises four gravity sensors installed on the installation platform and a flat plate fixed on the four gravity sensors, wherein the flat plate is provided with through holes, and the small hopper is fixed on the flat plate.

6. The automatic feeding and powder delivery mechanism according to claim 4, characterized in that: Also includes: The first connecting plate has an upper end fixed to the mounting platform, the second pneumatic blade valve is fixed to the first connecting plate via a first connecting frame, and the rotary discharge valve is fixed to the first connecting plate via a second connecting frame.

7. The automatic feeding and powder delivery mechanism according to claim 6, characterized in that: The first connecting plate is provided with at least one connecting hole; The automatic feeding and powder delivery mechanism also includes: A second connecting plate, the upper end of which is provided with a waist-shaped hole, the second connecting plate is fixed to the connecting hole by bolts and nuts, the lower end of the second connecting plate is in an inclined shape adapted to the material guide tube, and the second connecting plate is provided with a plurality of fixing holes; A plurality of U-shaped pipe clamps are arranged on the outer wall of the material guide pipe at intervals and fixed with a plurality of fixing holes through nuts.

8. The automatic feeding and powder delivery mechanism according to claim 2, characterized in that: The top cover and the cylindrical body are both provided with visual windows; a sealing gasket is provided at the gap between the top cover and the cylindrical body, and the top cover is detachably fixed to the cylindrical body through a plurality of lock buckles.

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