A powder conveying device

Abstract

The present invention belongs to the technical field of powder conveying, and relates to a powder conveying device, including a powder silo, an opening is provided at the bottom of the powder silo, a discharge barrel is sealedly connected below the powder silo, and an air supply pipe and a conveying pipe are respectively sealedly connected on the left and right sides of the discharge barrel; the opening is located in the discharge barrel, and a slider structure is provided at the opening, a conical groove is provided on the inner wall of the opening, a conical barrel is slidably provided in the conical groove, the conical groove is connected to the conical barrel by a spring, there is a gap between the conical barrel and the slider structure, and the conical barrel and the slider structure are connected by a plurality of wear-resistant elastic parts; the slider structure is connected to a driving rod, and the other end of the driving rod passes through the powder silo and extends out of the powder silo, and a driving device is provided on the powder silo, and the driving device is used to drive the driving rod to rise and fall. Compared with the powder conveying device in the prior art, the powder conveying device of the present invention has the advantage of good stability in powder material conveying.

Description

Technical Field

[0001] The invention belongs to the technical field of powder conveying and relates to a powder conveying device. Background Art

[0002] A powder conveying device is a conveying device that uses airflow energy to convey powdered materials along the airflow direction in a closed conveying pipeline. It can convey powdered materials horizontally, vertically or obliquely.

[0003] A common powder conveying device currently includes a powder silo, with a feed port at the upper end and a discharge port at the lower end. The discharge port is connected to a horizontal pneumatic conveying pipeline, and the powder enters the pneumatic conveying pipeline from the discharge port of the powder silo. Under the action of the airflow, the powder can be transported backward along the pneumatic conveying pipeline. However, the above method has defects in actual application: due to the high pressure in the pneumatic conveying pipeline, the powder is prone to backflow and blockage at the connection between the discharge port and the pneumatic conveying pipeline.

[0004] To solve this problem, there is a corresponding improvement scheme in the prior art, that is, a branch pipeline is connected to the pneumatic conveying pipeline, and the branch pipeline is connected to the upper part of the powder bin and communicated with the inside of the powder bin. During the conveying process, air can be inflated above the powder in the powder bin through the branch pipeline, so that the pressure above the powder is increased to push the powder material downward. However, this scheme of increasing the pressure from the top of the powder material to push the powder material downward is more likely to cause agglomeration and accumulation problems when the powder material is subjected to air pressure, thereby affecting the conveying of the powder material. Summary of the invention

[0005] The object of the present invention is to solve the above-mentioned problem and provide a powder conveying device.

[0006] To achieve the above object, the present invention provides a powder conveying device, comprising a powder silo, wherein an opening is provided at the bottom of the powder silo, a discharge barrel is sealedly connected below the powder silo, and an air supply pipe and a conveying pipe are sealedly connected to the left and right sides of the discharge barrel respectively;

[0007] The opening is located in the discharge barrel, a slider structure is matched at the opening, a conical groove is provided on the inner wall of the opening, a conical cylinder is slidably provided in the conical groove, the conical groove is connected to the conical cylinder by a spring, there is a gap between the conical cylinder and the slider structure, and the conical cylinder and the slider structure are connected by a plurality of wear-resistant elastic parts;

[0008] The slider structure is connected to a driving rod, the other end of which passes through the powder silo and extends out of the powder silo. A driving device is provided on the powder silo, and the driving device is used to drive the driving rod to rise and fall.

[0009] Furthermore, a transmission rack is provided at one end of the driving rod away from the slider structure, and the driving device includes a mounting seat and a driving motor mounted on the mounting seat, a driving gear is mounted on the output shaft of the driving motor, and the driving gear is meshed with the transmission rack.

[0010] Furthermore, a conical tube guide plate is provided in the discharge tube, and the conical tube guide plate is located at the outer periphery of the opening.

[0011] Furthermore, the lower end surface of the conical cylinder guide plate close to the air supply pipe is lower than the lower end surface of the conical cylinder guide plate close to the delivery pipe.

[0012] Furthermore, the slider structure has a flow guide portion, and the flow guide portion is located in the powder silo;

[0013] The surface of the guide portion is a conical surface, and the size of the guide portion gradually increases along the direction from the inside of the powder silo to the opening.

[0014] Furthermore, a plurality of connecting rods are fixedly mounted on the driving rod, and an arc-shaped scraper is disposed at one end of the connecting rod away from the driving rod, and the arc-shaped scraper is disposed closely against the inner wall of the powder silo.

[0015] Furthermore, a plurality of crushing teeth are provided on the arc-shaped scraper.

[0016] Furthermore, a mounting guide groove is provided in the conical groove, and a second mounting guide groove corresponding to the mounting guide groove is provided at one end of the conical tube facing the mounting guide groove;

[0017] One end of the spring is located in the installation guide groove and is fixedly connected to the installation guide groove, and the other end of the spring is located in the second installation guide groove and is fixedly connected to the second installation guide groove.

[0018] Furthermore, the discharge cylinder is also provided with an anti-deposition device, which includes an air cylinder and a piston structure slidably matched with the air cylinder, and the piston structure is fixedly connected to the lower side of the slider structure;

[0019] The air cylinder is connected to an air inlet pipeline, the air inlet pipeline extends out of the discharge cylinder, and a first one-way valve is arranged on the air inlet pipeline;

[0020] The air cylinder is connected to at least one air outlet pipeline, and a second one-way valve is arranged on the air outlet pipeline.

[0021] The beneficial effects of the present invention are as follows:

[0022] The powder conveying device of the present invention realizes the regular conveying of powder materials to the discharge barrel at intervals through the periodic up-and-down movement of the slider structure. At the same time, combined with the arrangement of the conical cylinder guide plate and the guide part, the smoothness of the powder conveying can be effectively ensured to avoid backflow or blockage.

[0023] In addition, the connecting frame, arc-shaped scraper and crushing tooth structure provided in the present invention and linked with the driving rod can further avoid blockage caused by the problem of powder agglomeration.

[0024] At the same time, the anti-deposition device provided in the present invention and linked with the slider structure can effectively avoid or improve the problem of deposition of powder materials in the discharge barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A perspective view schematically showing a powder conveying device according to an embodiment of the present invention;

[0026] Figure 2 A schematic diagram showing a front view of a powder conveying device according to an embodiment of the present invention;

[0027] Figure 3 A schematic top view of a powder conveying device according to an embodiment of the present invention is shown;

[0028] Figure 4 Schematic representation Figure 3 Sectional view at AA;

[0029] Figure 5 Schematic representation Figure 4 Enlarged view of part a in the middle;

[0030] Figure 6 A three-dimensional diagram schematically showing a powder silo according to an embodiment of the present invention;

[0031] Figure 7 Schematic representation Figure 6 Enlarged view of part b in the middle;

[0032] Figure 8 A diagram schematically showing the cooperation between a slider structure and a driving device according to an embodiment of the present invention;

[0033] Fig. 9 Schematic representation Figure 8 Enlarged view of middle c part;

[0034] Fig.10 Schematically showing a three-dimensional view of a powder conveying device according to an embodiment of the present invention Figure 2 ;

[0035] Fig.11 The structure of an anti-deposition device according to an embodiment of the present invention is schematically shown.

[0036] The meanings of the symbols in the accompanying drawings are as follows:

[0037] 1. Powder silo; 2. Opening; 3. Discharging barrel; 31. Air supply pipe; 32. Conveying pipe; 4. Slider structure; 5. Conical groove; 6. Conical barrel; 7. Spring; 8. Spacer; 9. Wear-resistant elastic member; 10. Driving rod; 11. Driving device; 12. Anti-deposition device; 101. Transmission rack; 111. Mounting seat; 112. Driving motor; 113. Driving gear; 33. Conical barrel guide plate; 41. Guide part; 102. Connecting rod; 103. Arc scraper; 104. Crushing tooth; 51. Installation guide groove; 61. Second installation guide groove; 121. Air cylinder; 122. Piston structure; 123. Inlet pipeline; 124. First one-way valve; 125. Outlet pipeline; 126. Second one-way valve. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not therefore limited to the following embodiments.

[0040] Combination Figure 1-Figure 9 As shown, the present invention provides a powder conveying device, including a powder silo 1, wherein the powder silo 1 includes a straight cylinder portion and a conical cylinder portion connected to the straight cylinder portion. A discharge barrel 3 is sealed and connected below the powder silo 1. In this embodiment, the conical cylinder portion of the powder silo 1 is sealed and connected to the discharge barrel 3. An opening 2 is provided at the bottom of the powder silo 1, and the opening 2 is located in the discharge barrel 3. An air supply pipe 31 and a conveying pipe 32 are respectively sealed and connected to the left and right sides of the discharge barrel 3. The air supply pipe 31 is used to provide airflow to convey the powder delivered to the discharge barrel 3 to the conveying pipe 32 for continuous backward conveying.

[0041] According to an embodiment of the present invention, a slider structure 4 is provided at the opening 2, and the slider structure 4 can be used to shield the opening 2. Thus, a closed space is formed between the slider structure 4 and the powder silo 1. In this embodiment, a conical groove 5 is provided on the inner wall of the opening 2, and a conical cylinder 6 is slidably provided in the conical groove 5, and the conical groove 5 and the conical cylinder 6 are connected by a spring 7. Specifically, a mounting guide groove 51 is provided in the conical groove 5, and a second mounting guide groove 61 corresponding to the mounting guide groove 51 is provided at one end of the conical cylinder 6 facing the mounting guide groove 51, one end of the spring 7 is located in the mounting guide groove 51 and fixedly connected to the mounting guide groove 51, and the other end of the spring 7 is located in the second mounting guide groove 61 and fixedly connected to the second mounting guide groove 61. In the powder conveying device of the present invention, when the conical cylinder 6 is subjected to an outward force, the conical cylinder 6 can slide outward along the conical groove 5, and the spring 7 is in a stretched state at this time. When the force is withdrawn, the conical cylinder 6 can be reset under the action of the spring 7. In this embodiment, a plurality of springs 7 are provided.

[0042] In the powder conveying device of the present invention, there is a gap 8 between the conical cylinder 6 and the slider structure 4, and the conical cylinder 6 and the slider structure 4 are connected by a plurality of wear-resistant elastic parts 9. The slider structure 4 is connected to a driving rod 10, and the other end of the driving rod 10 passes through the upper inner wall of the powder silo 1 and extends out of the powder silo 1. The powder silo 1 is provided with a driving device 11, and the driving device 11 is used to drive the driving rod 10 to rise and fall. In this embodiment, a transmission rack 101 is provided at one end of the driving rod 10 away from the slider structure 4, and the driving device 11 includes a mounting seat 111 and a driving motor 112 mounted on the mounting seat 111, and a driving gear 113 is installed on the output shaft of the driving motor 112, and the driving gear 113 is meshed with the transmission rack 101.

[0043] The powder conveying device of the present invention is arranged according to the above structure. In the initial state, the interval 8 between the conical barrel 6 and the slider structure 4 is located in the conical groove 5, and the slider structure 4 is matched with the opening 2 and abutted. At this time, the powder is located in the powder silo 1 and cannot enter the discharge barrel 3. When the powder needs to be conveyed, the drive motor 112 works, so that the drive gear 113 rotates to drive the transmission rack 101 to move downward, so that the drive rod 10 moves downward, and then the slider structure 4 leaves the opening 2 and moves downward. The movement of the slider structure 4 causes the wear-resistant elastic member 9 to undergo elastic deformation and drive the conical barrel 6 to slide downward along the conical groove 5, stretching the spring 7. In this process, the interval 8 is gradually pulled out of the conical groove 5 (the final state of pulling out is that the interval 8 is not completely pulled out of the conical groove 5, that is, the movement stroke of the conical barrel 6 does not exceed the conical groove 5), so that the powder material can fall from the interval 8, enter the discharge barrel 3, and be conveyed to the conveying pipe 32 by the airflow in the air supply pipe 31. After the slider structure 4 moves downward to the lowest position, the driving motor 112 starts to reverse, so that the slider structure 4 gradually resets upward. At this time, the tension of the wear-resistant elastic member 9 decreases, and the conical cylinder 6 and the wear-resistant elastic member 9 are reset under the action of the spring 7. The above working process is then repeated, so that continuous and stable conveying of the powder can be achieved. Compared with the powder conveying device in the prior art, the above technical solution of the present invention has good conveying stability and is conducive to avoiding or reducing the problem of blockage.

[0044] According to the concept of the present invention, the specific arrangement of the wear-resistant elastic member 9 is not limited. In principle, any connection member that can enable the tapered tube 6 to move along the tapered groove 5 when the slider structure 4 is forced to move downward can be used, for example, a wear-resistant elastic rope, a wear-resistant elastic rubber rod, etc. Taking the wear-resistant elastic rubber rod as an example, in order to further improve the use effect and service life, the wear-resistant elastic rubber rod can be arranged to be hingedly connected to both the tapered tube 6 and the slider structure 4.

[0045] Combination Figure 4 As shown, according to one embodiment of the present invention, the slider structure 4 has a guide portion 41, the guide portion 41 is located in the powder silo 1, the surface of the guide portion 41 is a conical surface, and the size of the guide portion 41 gradually increases along the direction from the inside of the powder silo 1 to the opening 2. Such a configuration is conducive to the powder being transported along the guide portion 41 through the gap 8.

[0046] According to one embodiment of the present invention, a conical guide plate 33 is provided in the discharge cylinder 3, and the conical guide plate 33 is located at the outer periphery of the opening 2. The lower end surface of the conical guide plate 33 close to the air supply pipe 31 is lower than the lower end surface of the conical guide plate 33 close to the conveying pipe 32.

[0047] The powder conveying device of the present invention is advantageous for further smooth and stable conveying of the powder material by providing the conical cylinder guide plate 33 of the above-mentioned structural form, and is also advantageous for avoiding the backflow problem.

[0048] Combination Figure 4 and Figure 8 As shown, according to one embodiment of the present invention, the driving rod 10 is fixedly mounted with a plurality of connecting rods 102, and an arc-shaped scraper 103 is provided at one end of the connecting rod 10 away from the driving rod 10, and the arc-shaped scraper 103 is arranged close to the inner wall of the powder silo 1. The arc-shaped scraper 103 is provided with a plurality of crushing teeth 104.

[0049] The powder conveying device of the present invention is arranged through the above-mentioned structure. When the driving rod 10 moves up and down, it can drive the connecting rod 102 to move, thereby realizing the movement of the arc scraper 103, thereby solving the problem of powder agglomeration to a certain extent and avoiding the blockage problem caused by powder agglomeration. In particular, it can avoid the problem of powder sticking to the inner wall of the powder silo.

[0050] like Figure 8 As shown, in the illustrated embodiment, a plurality of connecting rods 102 are located at the same height of the driving rod 10. According to the concept of the present invention, the connecting rods 102 can be arranged at intervals along the height direction of the driving rod 10, which can further enhance the functionality of preventing powder agglomeration.

[0051] Combination Figure 4 , Figure 10-11 As shown, according to one embodiment of the present invention, an anti-deposition device 12 is also provided in the discharge barrel 3. In this embodiment, the anti-deposition device 12 includes an air cylinder 121, and the air cylinder 121 is slidably matched with a piston structure 122, and the piston structure 122 is fixedly connected to the lower side of the slider structure 4. The air cylinder 121 is connected to an air inlet pipeline 123, and the air inlet pipeline 123 extends out of the discharge barrel 3. A first one-way valve 124 is provided on the air inlet pipeline 123, so that air can only enter the air cylinder 121 from the air inlet pipeline 123. In addition, the air cylinder 121 is also connected to at least one air outlet pipeline 125, and a second one-way valve 126 is provided on the air outlet pipeline 125, so that the air in the air cylinder 121 can only be transported from the air cylinder 121 to the air outlet pipeline 125.

[0052] The powder conveying device of the present invention is provided with the anti-deposition device 12. When the powder material is conveyed, that is, when the slider structure 4 moves downward, the piston structure 122 moves downward, so that the air in the air cylinder 121 is conveyed outward through the air outlet pipe 125, and then the bottom of the discharge barrel 3 can be blown to prevent the powder material from being deposited at the bottom of the discharge barrel 3. When the slider structure 4 is reset upward, the piston structure 122 moves upward, and at this time, the air enters the air cylinder 121 through the first one-way valve 124 for storage.

[0053] The above is only one embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A powder conveying device, comprising a powder silo (1), wherein the bottom of the powder silo (1) is provided with an opening (2), characterized in that: A discharge barrel (3) is sealedly connected below the powder silo (1), and an air supply pipe (31) and a conveying pipe (32) are respectively sealedly connected to the left and right sides of the discharge barrel (3); The opening (2) is located in the discharge barrel (3), and a slider structure (4) is provided at the opening (2). A conical groove (5) is provided on the inner wall of the opening (2), and a conical barrel (6) is slidably provided in the conical groove (5). The conical groove (5) and the conical barrel (6) are connected via a spring (7). There is a gap (8) between the conical barrel (6) and the slider structure (4), and the conical barrel (6) and the slider structure (4) are connected via a plurality of wear-resistant elastic parts (9); The slider structure (4) is connected to a driving rod (10), the other end of the driving rod (10) passes through the powder silo (1) and extends out of the powder silo (1), and a driving device (11) is provided on the powder silo (1), and the driving device (11) is used to drive the driving rod (10) to move up and down.

2. The powder conveying device according to claim 1, characterized in that: A transmission rack (101) is provided at one end of the driving rod (10) away from the slider structure (4); the driving device (11) comprises a mounting seat (111) and a driving motor (112) mounted on the mounting seat (111); a driving gear (113) is mounted on an output shaft of the driving motor (112); and the driving gear (113) is meshed with the transmission rack (101).

3. The powder conveying device according to claim 2, characterized in that: A conical cylinder guide plate (33) is provided inside the discharge cylinder (3), and the conical cylinder guide plate (33) is located on the outer periphery of the opening (2).

4. The powder conveying device according to claim 3, characterized in that: The lower end surface of the conical cylinder flow guide plate (33) close to the air supply pipe (31) is lower than the lower end surface of the conical cylinder flow guide plate (33) close to the delivery pipe (32).

5. The powder conveying device according to claim 1, characterized in that: The slider structure (4) has a flow guide portion (41), and the flow guide portion (41) is located in the powder silo (1); The surface of the flow guide portion (41) is a conical surface, and the size of the flow guide portion (41) gradually increases along the direction from the inside of the powder silo (1) to the opening (2).

6. The powder conveying device according to claim 2, characterized in that: The driving rod (10) is fixedly mounted with a plurality of connecting rods (102); an end of the connecting rod (102) away from the driving rod (10) is provided with an arc-shaped scraper (103); and the arc-shaped scraper (103) is arranged in close contact with the inner wall of the powder silo (1).

7. The powder conveying device according to claim 6, characterized in that: The arc-shaped scraper (103) is provided with a plurality of crushing teeth (104).

8. The powder conveying device according to claim 1, characterized in that: The conical groove (5) is provided with a mounting guide groove (51), and one end of the conical cylinder (6) facing the mounting guide groove (51) is provided with a second mounting guide groove (61) corresponding to the mounting guide groove (51); One end of the spring (7) is located in the installation guide groove (51) and is fixedly connected to the installation guide groove (51), and the other end of the spring (7) is located in the second installation guide groove (61) and is fixedly connected to the second installation guide groove (61).

9. The powder conveying device according to claim 1, characterized in that: The discharge cylinder (3) is also provided with an anti-deposition device (12), the anti-deposition device (12) comprising an air cylinder (121) and a piston structure (122) slidably matched with the air cylinder (121), the piston structure (122) being fixedly connected to the lower side of the slider structure (4); The air cylinder (121) is connected to an air intake pipeline (123), the air intake pipeline (123) extends out of the discharge cylinder (3), and a first one-way valve (124) is provided on the air intake pipeline (123); The gas cylinder (121) is connected to at least one gas outlet pipeline (125), and a second one-way valve (126) is provided on the gas outlet pipeline (125).

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