Vacuum feeding and conveying device capable of adapting to powder materials of various densities

Abstract

The utility model relates to a vacuum feeding and conveying device capable of adapting to powder materials of various densities, and belongs to the technical field of powder conveying, the vacuum feeding and conveying device comprises a material tank, a material bin communicated with the bottom end of the material tank and a vacuum feeding machine, and a vacuum suction pipe communicated with the vacuum feeding machine extends into the material bin. According to the vacuum feeding and conveying device capable of adapting to the powder materials of various densities, screw rotation and vibration motor auxiliary vibration are arranged in the stock bin used for storing the powder materials, so that the phenomenon that the powder materials in the stock bin are agglomerated is reduced, meanwhile, a closing-up structure is arranged in the vacuum suction pipe used for negative pressure vacuum adsorption, and therefore the powder materials of various densities can be fed and conveyed. By means of the mode that the end portions of the reeds abut against the conical inner cavity to form the conical inner cavity, the diameter of the round pipe passing through is changed, back-and-forth control is conducted, so that negative pressure suction force generated at the end portions of the round pipe can fluctuate, powder cakes blocked at the end portions of the round pipe can be fed after being subjected to negative pressure crushing, the feeding difficulty is lowered, and the practicability of the device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of powder conveying, and specifically to a vacuum feeding and conveying device for powder materials adaptable to various densities. Background Art

[0002] In the powder conveying industry, screw mechanical feeding is generally adopted, usually consisting of a screw blade made of metal material with a certain screw angle and pulp, used to push the material along the screw conveying pipeline.

[0003] During the use of screw mechanical feeding, it is found that there is a jamming phenomenon in the screw barrel. Therefore, it is necessary to arrange a special person to be on duty. To solve this problem, a vacuum feeder is used to perform feeding by means of vacuum suction, which can avoid arranging a special person to be on duty and can improve the conveying of powder materials with different densities at the same time.

[0004] However, when the above-mentioned vacuum feeder is used for powder conveying, the powder material will sink and accumulate and cake in the silo due to high density. When feeding by means of vacuum suction at this time, it is easy to block the channel, thus increasing the conveying difficulty. For this reason, a vacuum feeding and conveying device for powder materials adaptable to various densities is proposed to solve the above-mentioned problems. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the present application provides a vacuum feeding and conveying device for powder materials adaptable to various densities, which has the advantages of crushing powder caking and reducing the difficulty of vacuum feeding and conveying.

[0006] To achieve the above object, the present application provides the following technical solution: A vacuum feeding and conveying device for powder materials adaptable to various densities, including a material tank, a silo connected to the bottom end of the material tank, and a vacuum feeder. A vacuum suction pipe is connected to the vacuum feeder and extends into the silo, and a closing device is provided at the end of the vacuum suction pipe.

[0007] The closing device includes a round pipe fixedly installed at the end of the vacuum suction pipe and a slider located inside the round pipe. A reed extending into the inside of the round pipe is fixedly connected to the pipe orifice part of the round pipe. The reed is inclined in the horizontal direction and connected inside the round pipe. A strong magnetic ring is slidably installed outside the round pipe, and the slider is a metal block adsorbed by the strong magnetic ring.

[0008] Further, a vibration motor is fixedly installed on the outer wall of the silo.

[0009] Further, a screw seat is vertically and fixedly installed on the inclined inner wall of the silo. A screw extending outside the silo is rotatably installed on the screw seat. A servo motor is fixedly installed on the outer wall of the silo through a bracket, and the output end of the servo motor is fixedly connected to the screw.

[0010] Furthermore, spiral slices are distributed on the outside of the screw, and a sealing ring is fixed on one end of the screw that passes through the silo wall.

[0011] Furthermore, the number of the reeds is several, and the several reeds are arranged in a circle in the circular tube.

[0012] Furthermore, a connecting ear is fixedly mounted on the sliding block, a guide rail is fixedly mounted on the outer wall of the spring sheet, and the connecting ear is slidably connected to the guide rail.

[0013] Furthermore, an electric push rod is fixedly mounted on the outside of the circular tube, and a piston rod end of the electric push rod is fixedly connected to the strong magnetic ring.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] The vacuum feeding and conveying device for powder materials that can adapt to various densities reduces the phenomenon of powder material agglomeration in the silo by providing a screw for rotating and a vibration motor for assisting vibration in a silo for storing powder materials. At the same time, a closing structure is provided in a vacuum suction pipe for negative pressure vacuum adsorption, that is, a conical inner cavity is formed by abutting the ends of the spring sheets to change the diameter of the circular tube passing through, and the device is controlled back and forth so that the negative pressure suction force generated at the end of the circular tube can fluctuate, thereby crushing the powder agglomerates blocked at the end of the circular tube under negative pressure before feeding, thereby reducing the difficulty of feeding and improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of this application;

[0017] Figure 2 This is a top view of the structure of the silo for this application;

[0018] Figure 3 This is a schematic diagram of the structure of the circular tube in this application;

[0019] Figure 4 This is a structural arrangement diagram of the reeds of this application.

[0020] In the figure: 1. material tank; 2. material silo; 3. vacuum loader; 4. vacuum suction tube; 5. vibration motor; 6. servo motor; 7. screw seat; 8. screw; 9. round tube; 10. reed; 11. guide rail; 12. slider; 13. connecting ear; 14. strong magnetic ring; 15. electric push rod. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0022] Please refer to Figures 1 to 4 , a vacuum feeding and conveying device for powder materials adaptable to various densities in this embodiment, includes a material tank 1, a bin 2 connected to the bottom end of the material tank 1, and a vacuum feeder 3. A vacuum suction pipe 4 is connected to the vacuum feeder 3 and extends into the bin 2 for sucking and adsorbing powder materials for feeding.

[0023] In this embodiment, a vibration motor 5 is fixedly installed on the outer wall of the bin 2. The vibration motor 5 can assist in vibrating the bin 2 to improve the dispersion effect of the powder materials in the bin 2 and reduce the caking phenomenon.

[0024] It should be noted that a screw seat 7 is vertically and fixedly installed on the inclined inner wall of the bin 2. A screw 8 extending outside the bin 2 is rotatably installed on the screw seat 7. A servo motor 6 is fixedly installed on the outer wall of the bin 2 through a bracket. The output end of the servo motor 6 is fixedly connected to the screw 8, and the screw 8 can be driven to rotate by the servo motor 6. At the same time, under the rotation of the screw 8, the caked powder materials are broken.

[0025] Preferably, spiral slices are distributed on the outer part of the screw 8 for breaking the caked powder. A sealing ring is also fixedly installed at one end of the screw 8 passing through the wall of the bin 2 to seal the bin 2.

[0026] In order to realize the vacuum suction and crushing of powder to break the powder caking, a necking device is provided at the end of the vacuum suction pipe 4 in this embodiment to change the caliber of the vacuum suction pipe 4, so as to change the vacuum negative pressure difference.

[0027] Generally speaking, a smaller pipe diameter will cause the air flow speed to increase, and the rapid air flow will generate higher friction and resistance, resulting in a decrease in the vacuum negative pressure in the gas system. Therefore, in the same situation, in a vacuum system with a smaller pipe diameter, a higher vacuum negative pressure will appear, that is, adsorbing powder in a large-diameter state and increasing the vacuum negative pressure by reducing the pipe diameter, so that the caked powder is blocked at the pipe orifice position and the caking state is destroyed by the negative pressure.

[0028] In this embodiment, the closing device includes a circular tube 9 fixedly installed at the end of the vacuum suction tube 4 and a slider 12 located in the circular tube 9. The inner wall of the circular tube 9 is recessed toward the outside of the circular tube 9 and has a cavity with a diameter larger than the diameter of the tube mouth of the circular tube 9. The tube mouth part of the circular tube 9 is fixedly connected with a reed 10 extending to the inside of the circular tube 9. The reed 10 is connected in the circular tube 9 at an angle to the horizontal direction.

[0029] Preferably, there are several reeds 10, which are arranged in a circle inside the circular tube 9. Since there is a cavity on the inner wall of the circular tube 9, there is a movable space between the reed 10 whose one end is flush with the tube mouth of the circular tube 9 and the inner wall of the circular tube 9. The slider 12 slides in contact with the circular tube 9 and is located between the inner wall of the circular tube 9 and the reed 10.

[0030] It should be noted that a connecting ear 13 is fixedly installed on the slider 12, a guide rail 11 is fixedly installed on the outer wall of the reed 10, and the connecting ear 13 is slidably connected to the guide rail 11. Through the connection of the guide rail 11 to the connecting ear 13, the slider 12 can squeeze the reed 10 to change the bending angle relative to the round tube 9 while sliding relative to the round tube 9 until the ends of several reeds 10 abut against each other.

[0031] In order to control the sliding of the slider 12 , a strong magnetic ring 14 is slidably installed on the outside of the circular tube 9 in this embodiment. The slider 12 is a metal block adsorbed by the strong magnetic ring 14 and can move with the strong magnetic ring 14 .

[0032] In this embodiment, an electric push rod 15 is fixedly installed on the outside of the circular tube 9, and the piston rod end of the electric push rod 15 is fixedly connected to the strong magnetic ring 14. The electric push rod 15 pushes the strong magnetic ring 14 back and forth, so that the slider 12 can be pulled back and forth.

[0033] It should be noted that the electric push rod 15 is not arranged on one side of the strong magnetic ring 14 alone, but there are multiple electric push rods 15 at the same time to prevent the strong magnetic ring 14 from being subjected to force on one side.

[0034] The working principle of the above embodiment is:

[0035] By controlling the electric push rod 15 to push the strong magnetic ring 14 to slide back and forth on the outside of the round tube 9, the slider 12 attracted by the magnetic force of the strong magnetic ring 14 can fit the inner wall of the round tube 9 and slide back and forth synchronously. During the sliding process of the slider 12, the connecting ear 13 on the slider 12 and the guide rail 11 on the surface of the reed 10 are slidably connected to each other, so that the slider 12 slides toward the end of the round tube 9. The connecting ear 13 squeezes the reed 10 to make the reed 10 bend. When the ends of several reeds 10 abut against each other, the caliber that can pass through the round tube 9 is reduced, thereby improving the negative pressure adsorption effect and forcing the powder to be blocked and then broken and fed.

[0036] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0037] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A vacuum feeding and conveying device for powder materials of various densities, comprising a material tank (1), a material bin (2) connected to the bottom end of the material tank (1), and a vacuum feeder (3), characterized in that: The vacuum feeder (3) is connected to a vacuum suction pipe (4) extending into the material bin (2), and a closing device is provided at the end of the vacuum suction pipe (4); The closing device comprises a round tube (9) fixedly mounted at the end of the vacuum suction tube (4) and a slider (12) located in the round tube (9); the tube mouth of the round tube (9) is fixedly connected with a reed (10) extending into the inside of the round tube (9); the reed (10) is connected in the round tube (9) at an angle to the horizontal direction; a strong magnetic ring (14) is slidably mounted on the outside of the round tube (9); and the slider (12) is a metal block adsorbed by the strong magnetic ring (14).

2. The vacuum feeding and conveying device for powder materials of various densities according to claim 1 is characterized in that: A vibration motor (5) is fixedly mounted on the outer wall of the silo (2).

3. The vacuum feeding and conveying device for powder materials of various densities according to claim 1 is characterized in that: A screw seat (7) is also vertically fixedly mounted on the inclined inner wall of the silo (2), and a screw (8) extending to the outside of the silo (2) is rotatably mounted on the screw seat (7). A servo motor (6) is fixedly mounted on the outer wall of the silo (2) via a bracket, and the output end of the servo motor (6) is fixedly connected to the screw (8).

4. The vacuum feeding and conveying device for powder materials of various densities according to claim 3 is characterized in that: The outside of the screw (8) is provided with spiral slices, and a sealing ring is fixed on one end of the screw (8) that passes through the wall of the silo (2).

5. The vacuum feeding and conveying device for powder materials of various densities according to claim 1 is characterized in that: The number of the reed leaves (10) is several, and the several reed leaves (10) are arranged in a circle inside the circular tube (9).

6. The vacuum feeding and conveying device for powder materials of various densities according to claim 1 is characterized in that: A connecting ear (13) is fixedly mounted on the sliding block (12), a guide rail (11) is fixedly mounted on the outer wall of the leaf spring (10), and the connecting ear (13) is slidably connected to the guide rail (11).

7. The vacuum feeding and conveying device for powder materials of various densities according to claim 1 is characterized in that: An electric push rod (15) is also fixedly mounted on the outside of the circular tube (9), and the piston rod end of the electric push rod (15) is fixedly connected to the strong magnetic ring (14).

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