Screw type powder fine metering and feeding device

Abstract

The invention discloses a screw type powder fine metering and feeding device. The screw type powder fine metering and feeding device comprises a feeding pipe, a feeding spiral part located in the feeding pipe, an electronic hoist scale, a strip-shaped frame and an arc pipe installed on one side in a bottom frame. According to the powder metering device, the action requirement for power-on and power-off of the motor can be flexibly switched, uncertain factors for interference and influence of external force on the weighing structure are avoided, and the powder metering accuracy is improved; the internal space of the strip-shaped frame is inflated through an external inflation device via a tire inflation nozzle, so that the strip-shaped steel sheets expand outwards to make contact with the spiral edge of the feeding spiral piece, the contact strength can reach the optimal contact state of making contact with spiral blades through air pressure adjustment, and the mode that a traditional hard pipe wall makes contact with the feeding spiral piece is replaced; gaps formed by friction and abrasion of the spiral blade can be conveniently adjusted, compensated and filled, the frequency of regular disassembly and replacement can be reduced, falling of residual powder can be accelerated by means of separation from the spiral blade, and the situation that the whole weighing precision is affected due to residual powder accumulation is avoided.

Description

Technical Field

[0001] This invention relates to the field of powder metering and feeding technology, specifically a screw-type fine powder metering and feeding device. Background Technology

[0002] Screw-type metering and weighing devices are common continuous weighing equipment, widely used for metering and conveying powdery and granular materials. Currently, existing screw-type powder metering and feeding devices have the following drawbacks in the powder weighing and feeding process: 1. Under long-term operating wear and tear, as well as vibration during screw blade operation, the gap between the screw blades and the inner wall of the tube can easily increase, leading to inaccurate feeding and metering; 2. The use of rigid metal tubes in contact with the screw blades makes it impossible to control the size of the contact gap, resulting in residual powder that is difficult to completely remove and difficult to clean, also affecting the accuracy of metering and feeding; 3. The motor driving the screw blades is greatly affected by the pull of the conductive power supply, leading to unstable weighing and metering. Therefore, this paper proposes a screw-type fine powder metering and feeding device to address the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a screw-type fine powder metering and feeding device to solve the above-mentioned problems.

[0004] The present invention achieves the above objectives through the following technical solution: a screw-type fine powder metering and feeding device, comprising a feeding pipe, a feeding screw located inside the feeding pipe, an electronic hanging scale, a strip frame, and an arc tube installed on one side inside the base frame. A hanging chain connected to one end of the feeding pipe is connected to the electronic hanging scale, and the other end of the feeding pipe is rotatably installed between two first bearing seats. One end of the feeding screw is connected to a motor located at the end face of the other end of the feeding pipe. The periphery of each side strip hole distributed on the feed pipe is sealed and fixedly connected to the edge of the strip frame opening, and the periphery of the side strip hole opening is sealed and fixedly connected to the periphery of the strip steel sheet. The surface of the strip steel sheet slides into contact with the spiral edge of the feeding screw through air pressure. A set of oblique holes are distributed on the strip steel sheet. A bent pipe is sealed and installed on one side of each oblique hole, and one end of the bent pipe is connected to the connecting pipe. One end of the connecting pipe is installed on the pressure valve. Both ends of the arc tube are fitted with rubber sheets, and the rubber sheets are fitted with detachable magnetic connectors. The right and left magnetic connectors on the feed tube are alternately connected and disconnected by being positioned on the side of the feed tube between the two detachable magnetic connectors.

[0005] In a further technical solution, the electronic crane scale is suspended in the middle of the U-shaped frame, and the bottom ends of the U-shaped frame are welded to the base frame. The front and rear protrusions located on one side of the base frame are fixedly connected to the bottom of the two first bearing seats respectively.

[0006] A further technical solution is provided with an inlet at the top of one end of the feeding pipe and an outlet at the bottom of the other end of the feeding pipe. A second bearing seat is installed on the L-shaped plate connected at the other end of the feeding pipe, and the second bearing seat is rotatably connected to the other end of the feeding screw.

[0007] In a further technical solution, the center of the arc tube is located at the rotatable connection between the feed tube and the first bearing seat, and the arc tube, the right magnetic connector and the left magnetic connector are located on the same arc.

[0008] In a further technical solution, the arc tube is divided into two sealed spaces by arc partitions, and the left and right power supply lines are respectively distributed in the two sealed spaces. Each sealed space is connected to an external pneumatic system through an air guide pipe.

[0009] In a further technical solution, the bottom of the inside of the strip frame is fixedly connected to the pressure valve, and a tire inflation nozzle is provided on the outside of the strip frame.

[0010] In a further technical solution, the bend is made of flexible tubing, and the connecting pipe is made of metal.

[0011] In a further technical solution, a set of arc-shaped steel strips are distributed on the strip-shaped steel sheet, and the two ends of the arc-shaped steel strips are respectively connected to the inner wall of the strip frame.

[0012] In a further technical solution, the right magnetic connector and the left magnetic connector are electrically connected to the power input terminal of the motor.

[0013] The beneficial effects of this invention are: 1. The center of the arc tube is located at the rotating connection between the feed tube and the first bearing seat, and the arc tube, the right magnetic connector and the left magnetic connector are located on the same arc. This is beneficial for the right magnetic connector and the left magnetic connector to accurately align with the two separable magnetic connectors located at both ends of the arc tube by lateral swinging. The automatic lateral swinging action can be completed by the weighing imbalance caused by the weight change of the left and right sides of the feed tube. 2. By inflating the sealed space on the left or right side, the rubber sheet at the left or right end of the arc tube bulges outward, causing the detachable magnetic connectors on the rubber sheet to move outward. This ensures that the two detachable magnetic connectors are fully magnetically attracted to the left and right magnetic connectors respectively, allowing for flexible switching of the motor's on / off operation. This avoids the uncertainty caused by external forces interfering with the balancing structure and improves the accuracy of powder metering. 3. Using an external inflation device, air is inflated into the internal space of the strip frame through the tire inflation nozzle. Under the continuous inflation and expansion, the strip steel sheet expands outward until the outer surface of the strip steel sheet contacts the spiral edge of the feeding screw inside the feeding pipe. The contact strength can be adjusted by air pressure to achieve the optimal contact state with the spiral blade. This replaces the traditional method of contacting the feeding screw with the hard pipe wall. It can easily adjust and compensate for the gaps formed by the friction and wear of the spiral blade. This reduces the frequency of regular disassembly and replacement, and accelerates the falling of residual powder by separating from the spiral blade, avoiding the accumulation of residual powder that affects the overall weighing accuracy. 4. Pressurized gas is discharged through the connecting pipe and the bend, and it is discharged from the inclined hole. The direction of the inclined hole is consistent with the direction of material movement, which facilitates the subsequent flushing of the inside of the feeding pipe with high-pressure gas, avoids powder residue, and solves the problem of residue accumulation due to inconvenient cleaning. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the connection structure between the feed pipe and the feeding screw of the present invention; Figure 3 This is a schematic diagram of the bar frame connection structure of the present invention; Figure 4 This is a schematic diagram of the strip steel sheet connection structure of the present invention; Figure 5 This is a schematic diagram showing the positional changes between the strip steel sheet and the feeding screw of the present invention; Figure 6 This is a schematic diagram of the arc tube connection structure of the present invention.

[0017] In the diagram: 1. Feed pipe; 110. Inlet; 120. Outlet; 130. Side strip hole; 2. Motor; 3. Electronic crane scale; 4. Lifting chain; 5. Strip frame; 510. Strip steel sheet; 511. Slanted hole; 520. Arc-shaped steel strip; 530. Pressure valve; 540. Bend; 541. Connecting pipe; 6. Base frame; 7. First bearing seat; 8. L-shaped plate; 9. Second bearing seat; 10. U-shaped frame; 11. Feeding auger; 12. Arc tube; 13. Right magnetic connector; 14. Left magnetic connector; 15. Rubber sheet; 16. Separable magnetic connector; 17. Arc partition; 18. Left power supply line; 19. Right power supply line; 20. Air guide pipe. Detailed Implementation

[0018] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0019] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] In the description of this invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Please see Figure 1-6 As shown, a screw-type fine powder metering and feeding device includes a feeding pipe 1, a feeding screw 11 located inside the feeding pipe 1, an electronic hanging scale 3, a strip frame 5, and an arc tube 12 installed inside one side of the base frame 6. A hanging chain 4 connected to one end of the feeding pipe 1 is connected to the electronic hanging scale 3, and the other end of the feeding pipe 1 is rotatably installed between two first bearing seats 7. One end of the feeding screw 11 is connected to a motor 2 located at the end face of the other end of the feeding pipe 1. The periphery of each side strip hole 130 located on the feed pipe 1 is sealed and fixedly connected to the edge of the frame 5, and the periphery of the side strip hole 130 is sealed and fixedly connected to the periphery of the strip steel sheet 510. The surface of the strip steel sheet 510 slides in contact with the spiral edge of the feeding screw 11 through air pressure. A set of inclined holes 511 are distributed on the strip steel sheet 510. A bent pipe 540 is sealed and installed on one side of each inclined hole 511, and one end of the bent pipe 540 is connected to the connecting pipe 541. One end of the connecting pipe 541 is installed on the pressure valve 530. Both ends of the arc tube 12 are equipped with rubber sheets 15, and the rubber sheets 15 are equipped with detachable magnetic connectors 16. The right magnetic connector 13 and the left magnetic connector 14 located on the feed tube 1 are alternately connected and disconnected by being positioned on the side of the feed tube 1 between the two detachable magnetic connectors 16.

[0022] The electronic crane scale 3 is hoisted in the middle of the U-shaped frame 10, and the bottom of both ends of the U-shaped frame 10 is welded to the base frame 6. The front and rear protrusions on one side of the base frame 6 are fixedly connected to the bottom of the two first bearing seats 7 respectively.

[0023] A feed inlet 110 is provided above one end of the feed pipe 1, and a discharge outlet 120 is provided below the other end of the feed pipe 1. A second bearing seat 9 is installed on the L-shaped plate 8 connected at the other end of the feed pipe 1, and the second bearing seat 9 is rotatably connected to the other end of the feeding screw 11.

[0024] Combination Figure 1 As shown, the center of the arc tube 12 is located at the rotatable connection between the feed tube 1 and the first bearing seat 7, and the arc tube 12, the right magnetic connector 13 and the left magnetic connector 14 are located on the same arc, which is beneficial for the right magnetic connector 13 and the left magnetic connector 14 to be accurately aligned with the two separable magnetic connectors 16 located at both ends of the arc tube 12 by side swinging.

[0025] like Figure 6 As shown, the arc tube 12 has two sealed spaces formed inside by the arc partition 17, and the left power supply line 18 and the right power supply line 19 are respectively distributed inside the two sealed spaces. Each sealed space is connected to an external pneumatic system through the air guide tube 20. When the sealed space on the left (right) side is in an inflated state, the rubber sheet 15 at the left (or right) end of the arc tube 12 bulges outward, causing the detachable magnetic connector 16 on the rubber sheet 15 to move outward, ensuring that the two detachable magnetic connectors 16 are fully magnetically attracted to the left magnetic connector 14 and the right magnetic connector 13 respectively, thus enabling flexible switching of the power supply to and from the motor 2.

[0026] Combination Figure 3 , Figure 4 and Figure 5 As shown, the bottom of the inside of the strip frame 5 is fixedly connected to the pressure valve 530, and a tire inflation nozzle is provided on the outside of the strip frame 5. An external inflation device inflates the internal space of the strip frame 5 through a tire inflator. The continuous inflation causes the strip steel sheet 510 to expand outwards until its outer surface contacts the spiral edge of the feeding auger 11 located inside the feeding pipe 1. The contact strength can be adjusted by the air pressure, achieving the desired effect. Figure 5 The right side of the middle; When the outer surface of the strip steel sheet 510 contacts the spiral edge of the feeding screw 11 located inside the feeding pipe 1, when the air pressure inside the strip frame 5 is less than the opening threshold of the pressure valve 530, no pressurized gas is discharged from the connecting pipe 541 and the bend 540; when the air pressure inside the strip frame 5 is greater than the opening threshold of the pressure valve 530, pressurized gas is discharged from the connecting pipe 541 and the bend 540, and is discharged from the inclined hole 511. The direction of the inclined hole 511 is consistent with the feeding movement direction, which facilitates the subsequent flushing of the inside of the feeding pipe 1 with high-pressure gas, avoids powder residue, and solves the problem of inconvenient cleaning.

[0027] Combination Figure 4 As shown, the bend 540 is made of flexible hose, and the connecting pipe 541 is made of metal. The flexible bend 540 is used to cope with the displacement caused by the deformation of the strip steel sheet 510 under stress.

[0028] Combination Figure 4 As shown, a set of arc-shaped steel strips 520 are distributed on the strip-shaped steel sheet 510, and the two ends of the arc-shaped steel strips 520 are respectively connected to the inner wall of the strip frame 5. The use of elastic arc-shaped steel strips 520 allows the strip-shaped steel sheet 510 to be completely restored to its initial state when the air pressure decreases, using a restorable elastic force. Figure 5 The left side of the text.

[0029] Combination Figure 1 As shown, the right magnetic connector 13 and the left magnetic connector 14 are electrically connected to the power input terminal of the motor 2; When the feed weight on the left side of the feed pipe 1 is not reached, the right magnetic connector 13 and the detachable magnetic connector 16 located at the right end of the arc tube 12 are magnetically attracted to each other, ensuring that the motor 2 is powered to run and drive the feeding screw 11 to rotate to feed the material. When the feed material on the left side of the feed pipe 1 reaches the set weight, the left side of the feed pipe 1 tilts downward and the right side tilts upward. The left side of the feed pipe 1 tilts downward and is in the weighing state of the electronic crane scale 3. The left magnetic connector 14 is close to the separable magnetic connector 16 located at the left end of the arc tube 12, and the right magnetic connector 13 is separated from the separable magnetic connector 16 located at the right end of the arc tube 12. At this time, the motor 2 is in the power-off and stopped state. When the electronic crane scale 3 finishes weighing the left side of the feeding pipe 1, the detachable magnetic connector 16 located at the left end of the arc pipe 12 moves outward and magnetically connects with the nearby left magnetic connector 14. At this time, the motor 2 is powered on and drives the connected feeding screw 11 to drive the powder located on the left side of the feeding pipe 1 forward and discharge it from the outlet 120 until the electronic crane scale 3 returns to the initial state before weighing. When the powder weighed for this time is discharged, the left side of the feeding pipe 1 begins to tilt upwards and reset, while the right side begins to tilt downwards and reset. As a result, the separable magnetic connector 16 located at the left end of the arc tube 12 resets and separates from the left magnetic connector 14. The motor 1 is de-energized and briefly stops until the separable magnetic connector 16 located at the right end of the arc tube 12 contacts the right magnetic connector 13 again and is energized. This allows the motor 1 to be energized again after a brief power outage, so as to complete the next feeding and weighing of the powder. The advantages of this invention are: 1. The center of the arc tube is located at the rotating connection between the feed tube and the first bearing seat, and the arc tube, the right magnetic connector and the left magnetic connector are located on the same arc. This is beneficial for the right magnetic connector and the left magnetic connector to accurately align with the two separable magnetic connectors located at both ends of the arc tube by lateral swinging. The automatic lateral swinging action can be completed by the weighing imbalance caused by the weight change of the left and right sides of the feed tube. 2. By inflating the sealed space on the left or right side, the rubber sheet at the left or right end of the arc tube bulges outward, causing the detachable magnetic connectors on the rubber sheet to move outward. This ensures that the two detachable magnetic connectors are fully magnetically attracted to the left and right magnetic connectors respectively, allowing for flexible switching of the motor's on / off operation. This avoids the uncertainty caused by external forces interfering with the balancing structure and improves the accuracy of powder metering. 3. Using an external inflation device, air is inflated into the internal space of the strip frame through the tire inflation nozzle. Under the continuous inflation and expansion, the strip steel sheet expands outward until the outer surface of the strip steel sheet contacts the spiral edge of the feeding screw inside the feeding pipe. The contact strength can be adjusted by air pressure to achieve the optimal contact state with the spiral blade. This replaces the traditional method of contacting the feeding screw with the hard pipe wall. It can easily adjust and compensate for the gaps formed by the friction and wear of the spiral blade. This reduces the frequency of regular disassembly and replacement, and accelerates the falling of residual powder by separating from the spiral blade, avoiding the accumulation of residual powder that affects the overall weighing accuracy. 4. Pressurized gas is discharged through the connecting pipe and the bend, and it is discharged from the inclined hole. The direction of the inclined hole is consistent with the direction of material movement, which facilitates the subsequent flushing of the inside of the feeding pipe with high-pressure gas, avoids powder residue, and solves the problem of residue accumulation due to inconvenient cleaning.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalent elements of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A screw-type fine powder metering and feeding device, characterized in that: Includes a feeding pipe (1), a feeding screw (11) located inside the feeding pipe (1), an electronic crane scale (3), a strip frame (5), and an arc pipe (12) installed on one side inside the base frame (6). A hanging chain (4) connected to one end of the feeding pipe (1) is connected to the electronic crane scale (3), and the other end of the feeding pipe (1) is rotatably installed between two first bearing seats (7). One end of the feeding screw (11) is connected to a motor (2) located at the other end face of the feeding pipe (1). The periphery of each side strip hole (130) located on the feed pipe (1) is sealed and fixedly connected to the edge of the frame opening of the strip frame (5), and the periphery of the side strip hole (130) is sealed and fixedly connected to the periphery of the strip steel sheet (510). The surface of the strip steel sheet (510) slides in contact with the spiral edge of the feeding screw (11) through air pressure. A set of inclined holes (511) are distributed on the strip steel sheet (510). A bent pipe (540) is sealed and installed on one side of each inclined hole (511), and one end of the bent pipe (540) is connected and installed on the connecting pipe (541). One end of the connecting pipe (541) is installed on the pressure valve (530). Both ends of the arc tube (12) are equipped with rubber sheets (15), and the rubber sheets (15) are equipped with detachable magnetic connectors (16). The right magnetic connector (13) and the left magnetic connector (14) located on the feed tube (1) are alternately connected and disconnected between the two detachable magnetic connectors (16) by being positioned on the side of the feed tube (1).

2. The screw-type fine powder metering and feeding device according to claim 1, characterized in that: The electronic crane scale (3) is hoisted in the middle of the U-shaped frame (10), and the bottom of both ends of the U-shaped frame (10) is welded to the base frame (6). The front and rear protrusions on one side of the base frame (6) are fixedly connected to the bottom of the two first bearing seats (7).

3. The screw-type fine powder metering and feeding device according to claim 1, characterized in that: The feed pipe (1) has an inlet (110) at the top of one end and an outlet (120) at the bottom of the other end. A second bearing seat (9) is installed on the L-shaped plate (8) connected at the other end of the feed pipe (1), and the second bearing seat (9) is rotatably connected to the other end of the feeding screw (11).

4. The screw-type fine powder metering and feeding device according to claim 1, characterized in that: The center of the arc tube (12) is located at the rotatable connection between the feed tube (1) and the first bearing seat (7), and the arc tube (12), the right magnetic connector (13) and the left magnetic connector (14) are located on the same arc.

5. The screw-type fine powder metering and feeding device according to claim 1, characterized in that: The arc tube (12) has two sealed spaces formed inside by arc partitions (17), and the left power supply line (18) and the right power supply line (19) are respectively distributed inside the two sealed spaces. Each sealed space is connected to an external pneumatic system through an air guide tube (20).

6. The screw-type fine powder metering and feeding device according to claim 1, characterized in that: The bottom of the inside of the strip frame (5) is fixedly connected to the pressure valve (530), and a tire inflation nozzle is provided on the outside of the strip frame (5).

7. The screw-type fine powder metering and feeding device according to claim 1, characterized in that: The bend (540) is made of flexible hose, and the connecting pipe (541) is made of metal.

8. The screw-type fine powder metering and feeding device according to claim 1, characterized in that: A set of arc-shaped steel strips (520) are distributed on the strip steel sheet (510), and the two ends of the arc-shaped steel strips (520) are respectively connected to the inner wall of the strip frame (5).

9. A screw-type fine powder metering and feeding device according to claim 1, characterized in that: The right magnetic connector (13) and the left magnetic connector (14) are electrically connected to the power input terminal of the motor (2).

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