Automatic start-stop negative pressure suction machine for processing calcium carbonate powder

Abstract

The utility model discloses an automatic start -stop negative pressure suction machine for calcium carbonate powder processing, including vacuum hopper, the inside upper end fixed mounting of vacuum hopper has first recessed disc and second recessed disc, the middle of first recessed disc is provided with the air intake, the lower middle installation of second recessed disc has first spring, the bottom of first spring is connected with first limit board, and the first limit board is engaged in the inside of air intake, the outside of first spring is equipped with bearing ring, and the bearing ring is installed with rotating vane, the edge of second recessed disc is provided with a plurality of shunt, and the inside of a plurality of shunt all is installed with the isolation net board, and the filter core is engaged and installed between the positioning ring and the positioning column, the utility model first spring and first limit board realize start -stop control, and realize the start -stop operation of not stopping through second spring and second limit board, and can realize the dust removal treatment in the process of start -stop.

Description

Technical Field

[0001] This utility model relates to a negative pressure feeding device, and more specifically to a negative pressure feeding device for calcium carbonate powder, and to an automatic start-stop negative pressure feeding device for calcium carbonate powder processing. Background Technology

[0002] Calcium carbonate powder is an important chemical raw material widely used in industrial production, food, and pharmaceutical fields. It comes in many varieties, which can be classified according to different production processes into heavy calcium carbonate, light calcium carbonate, colloidal calcium carbonate, and crystalline calcium carbonate. Based on the average particle size of the calcium carbonate powder, it can be classified into particulate calcium carbonate, micronized calcium carbonate, fine calcium carbonate, ultrafine calcium carbonate, and ultrafine calcium carbonate. According to the regularity of the arrangement of the atoms and ions that make up calcium carbonate, it can be classified into crystalline calcium carbonate and amorphous calcium carbonate.

[0003] In the processing of calcium carbonate powder, material conveying and collection are crucial steps. Negative pressure suction feeders, as important equipment for achieving efficient dust collection, are widely used in powder conveying, mixing, and packaging processes. Traditional negative pressure suction feeders typically employ a constant operating mode, continuously suctioning dust during material conveying to prevent dust dispersion.

[0004] Existing negative pressure material handling technologies mostly focus on improving material handling efficiency or adding filtration systems, but lack systematic research on automatic start-stop functions. Current methods use sensors to control the start and stop of the material handling machine, but these suffer from response delays and low control accuracy, failing to achieve timely start-stop control adjustments. Furthermore, frequent shutdowns and restarts can easily damage the equipment. Utility Model Content

[0005] One objective of this invention is to provide a new technical solution for an automatic start-stop negative pressure suction feeder for calcium carbonate powder processing.

[0006] According to a first aspect of the present invention, an automatic start-stop negative pressure feeding machine for processing calcium carbonate powder is provided, including a vacuum hopper, wherein a first recessed plate and a second recessed plate are fixedly installed at the upper end of the interior of the vacuum hopper, and the first recessed plate and the second recessed plate are connected to each other in opposite directions.

[0007] The first recessed plate has an exhaust port in the middle. The second recessed plate has a first spring fixedly installed in the middle of its lower part. The bottom end of the first spring is fixedly connected to a first limiting plate. The first limiting plate is engaged inside the exhaust port. The outer side of the first spring has a bearing ring, and a rotating blade is movably installed on the bearing ring.

[0008] The second recessed disc has several diversion ports on its edge, and each of the diversion ports is fixedly installed with an isolation mesh plate. A positioning post is fixedly installed in the middle of the second recessed disc. An air extraction pipe is provided at the upper end of the vacuum hopper. A positioning ring is fixedly installed inside the vacuum hopper on the outside of the air extraction pipe. A filter element is engaged between the positioning ring and the positioning post.

[0009] Optionally, one side of the extraction pipe is connected to a diversion pipe, and the inside of the diversion pipe is provided with an installation groove, the inner diameter of which is larger than the inner diameter of the diversion pipe.

[0010] Optionally, a positioning wing is fixedly provided inside the mounting groove, a second spring is fixedly provided on one side of the positioning wing, a second limiting plate is fixedly connected to one end of the second spring, the second limiting plate is movably located inside the mounting groove, and the diameter of the second limiting plate is larger than the inner wall diameter of the diversion pipe.

[0011] Optionally, the outer side of the second limiting plate is provided with a plurality of overflow holes, the plurality of overflow holes are arranged circumferentially, and the inner diameter of the plurality of overflow holes is larger than the inner wall diameter of the diversion pipe.

[0012] Optionally, a negative pressure pipe is connected to the extraction pipe, one end of which is connected to a vortex air pump, and a mounting base plate is fixedly connected to the bottom of the vortex air pump.

[0013] Optionally, a feed pipe is connected to the middle of the vacuum hopper, the feed pipe is located below the first recessed disk and the second recessed disk, and a suction pipe is fixedly connected to one end of the feed pipe.

[0014] Optionally, the upper end of the vacuum hopper is connected to a dust discharge pipe, which is located on the upper part of the first recessed plate and the second recessed plate, and one end of the dust discharge pipe is fixedly connected to the diversion pipe.

[0015] Optionally, the lower part of the diverter is connected to an inverted venturi tube, and the lower part of the venturi tube is fixedly connected to a spiral feed tube.

[0016] Optionally, a discharge pipe is fixedly provided at the bottom of the vacuum hopper, and a butterfly valve plate is movably installed inside the discharge pipe via a rotating shaft, with the butterfly valve plate movably located inside the discharge pipe.

[0017] Optionally, one end of the rotating shaft is movably connected to the inner wall of the discharge pipe, the other end of the rotating shaft passes through the discharge pipe, a positioning cylinder is welded to the outside of the discharge pipe, one end of the rotating shaft is threaded to the inside of the positioning cylinder, and a rotating handwheel is fixedly provided at the end of the rotating shaft.

[0018] According to one embodiment of this disclosure, the negative pressure suction machine installs the first spring and the first limiting plate through the first and second recessed discs. During operation, the negative pressure inside the vacuum hopper will suck up the first limiting plate. At this time, the first spring will contract, thereby enabling the vacuum hopper to suck up calcium carbonate powder through the feed pipe and the suction pipe. Furthermore, several diversion ports are provided on the second recessed disc, and the inside of the diversion ports is provided with an isolation mesh plate, which filters large particles of calcium carbonate powder.

[0019] In order to reduce the blockage of the isolation mesh plate by large calcium carbonate powder particles, a rotating blade is installed through the bearing ring. The rotating blade is driven by the airflow generated by negative pressure, so that the rotating blade is attached to the relative surfaces of the first and second recessed disks. This facilitates the blocking of large calcium carbonate powder particles and can also clean the large calcium carbonate powder particles that are blocked on the isolation mesh plate, thus preventing blockage.

[0020] When the filter element is filtering dust, the dust increases, causing the filter element to become clogged. When the air pressure inside the vacuum hopper decreases, the elastic force of the first spring is greater than the negative pressure, pushing the first limiting plate to the exhaust port to block it. At the same time, the airflow increases the pressure inside the diversion pipe, compressing the second spring and causing the second limiting plate to disengage from the contact surface. Air is then drawn through the overflow hole, and dust is extracted from the filter element through the dust discharge pipe. The external airflow is reduced through the venturi tube, allowing the dust to be discharged through the spiral feed pipe, thus cleaning the filter element. After the filter element is cleaned, the negative pressure inside the vacuum hopper increases, and the first limiting plate is sucked up again. The second limiting plate, due to the reduced pressure, blocks the diversion pipe again. This allows for automated start-stop control without stopping the machine and also enables the cleaning of the negative pressure suction machine.

[0021] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0023] Figure 1 This is a schematic front view of an automatic start-stop negative pressure feeder for processing calcium carbonate powder in one embodiment.

[0024] Figure 2 This is a schematic rear view of an automatic start-stop negative pressure feeder for processing calcium carbonate powder in one embodiment.

[0025] Figure 3 This is a partial structural schematic diagram of an automatic start-stop negative pressure feeder for processing calcium carbonate powder in one embodiment;

[0026] Figure 4 An exploded view of the internal structure of an automatic start-stop negative pressure feeder for processing calcium carbonate powder in one embodiment;

[0027] Figure 5 One embodiment is an automatic start / stop negative pressure suction feeder for processing calcium carbonate powder. Figure 2 Schematic diagram of cross-section at point A in the middle.

[0028] The diagram shows the following: 1. Vacuum hopper; 2. First recessed disc; 3. Second recessed disc; 4. First spring; 5. First limiting plate; 6. Exhaust port; 7. Bearing ring; 8. Rotating blade; 9. Diverter port; 10. Isolation mesh plate; 11. Positioning post; 12. Filter element; 13. Positioning ring; 14. Diverter pipe; 15. Dust discharge pipe; 16. Venturi tube; 17. Spiral feed pipe; 18. Mounting groove; 19. Positioning fin; 20. Second spring; 21. Second limiting plate; 22. Overflow hole; 23. Rotating shaft; 24. Butterfly valve plate; 25. Positioning cylinder; 26. Rotating handwheel; 27. Exhaust pipe; 28. Negative pressure pipe; 29. ​​Vortex air pump; 30. Mounting base plate; 31. Feed pipe; 32. Suction pipe; 33. Discharge pipe. Detailed Implementation

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0032] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0033] like Figure 1-5As shown, an automatic start-stop negative pressure feeding machine for processing calcium carbonate powder includes a vacuum hopper 1. A first recessed plate 2 and a second recessed plate 3 are fixedly installed at the upper end of the interior of the vacuum hopper 1. The first recessed plate 2 and the second recessed plate 3 are connected to each other in opposite directions.

[0034] The first recessed plate 2 has an exhaust port 6 in the middle. The second recessed plate 3 has a first spring 4 fixedly installed in the lower middle part. The bottom end of the first spring 4 is fixedly connected to a first limiting plate 5. The first limiting plate 5 is engaged inside the exhaust port 6. The outer side of the first spring 4 has a bearing ring 7. A rotating blade 8 is movably installed on the bearing ring 7.

[0035] The edge of the second recessed disc 3 has several diversion ports 9, and each diversion port 9 is fixedly installed with an isolation mesh plate 10. The middle of the second recessed disc 3 is fixedly provided with a positioning post 11. The upper end of the vacuum hopper 1 is provided with an air extraction pipe 27. The inside of the vacuum hopper 1 is fixedly provided with a positioning ring 13 on the outside of the air extraction pipe 27. A filter element 12 is engaged between the positioning ring 13 and the positioning post 11.

[0036] In this embodiment, preferably, one side of the suction pipe 27 is connected to a diversion pipe 14, and the inside of the diversion pipe 14 is provided with an installation groove 18, the inner wall diameter of the installation groove 18 being larger than the inner wall diameter of the diversion pipe 14.

[0037] It should be noted that the diversion pipe 14 is designed to extract airflow from the diversion channel, and the mounting groove 18 is designed to install the second limiting plate 21 and the second spring 20. The diameter of the mounting groove 18 is larger than the diameter of the diversion pipe 14, which facilitates the fitting and sealing of the second limiting plate 21 and also facilitates the extraction of airflow.

[0038] In this embodiment, preferably, a positioning wing 19 is fixedly provided inside the mounting groove 18, a second spring 20 is fixedly provided on one side of the positioning wing 19, a second limiting plate 21 is fixedly connected to one end of the second spring 20, the second limiting plate 21 is movably located inside the mounting groove 18, and the diameter of the second limiting plate 21 is larger than the inner wall diameter of the diversion pipe 14.

[0039] It should be noted that the positioning wing 19 is designed for the fixed installation connection of the second spring 20, and the second spring 20 pushes the second limiting plate 21 with elastic force to improve the sealing performance.

[0040] In this embodiment, preferably, a plurality of overflow holes 22 are provided on the outer side of the second limiting plate 21. The plurality of overflow holes 22 are arranged circumferentially, and the inner diameter of the plurality of overflow holes 22 is larger than the inner wall diameter of the diversion pipe 14.

[0041] It should be noted that the overflow hole 22 is designed so that when the air pressure is greater than the elasticity of the second spring 20, the second limiting plate 21 can form a stable airflow, which facilitates the negative pressure discharge of dust inside the vacuum hopper 1.

[0042] In this embodiment, preferably, a negative pressure pipe 28 is connected to the air extraction pipe 27, one end of the negative pressure pipe 28 is connected to the vortex air pump 29, and a mounting base plate 30 is fixedly connected to the bottom of the vortex air pump 29.

[0043] It should be noted that the negative pressure pipe 28 is used to connect to the vortex air pump 29. The vortex air pump 29 is used to extract airflow. The negative pressure pipe 28 and the air extraction pipe 27 are used to extract airflow to the vacuum hopper 1, so that a negative pressure state can be formed inside the vacuum hopper 1.

[0044] In this embodiment, preferably, the middle part of the vacuum hopper 1 is connected to the feed pipe 31, the feed pipe 31 is located at the lower part of the first recessed plate 2 and the second recessed plate 3, and one end of the feed pipe 31 is fixedly connected to the suction pipe 32.

[0045] It should be noted that the feed pipe 31 and suction pipe 32 are designed to facilitate the extraction of calcium carbonate powder under negative pressure. Furthermore, the feed pipe 31 is located at the lower part of the first recessed plate 2 and the second recessed plate 3 to facilitate the discharge of calcium carbonate powder.

[0046] In this embodiment, preferably, the upper end of the vacuum hopper 1 is connected to a dust discharge pipe 15, the dust discharge pipe 15 is disposed on the upper part of the first recessed plate 2 and the second recessed plate 3, and one end of the dust discharge pipe 15 is fixedly connected to the diversion pipe 14.

[0047] It should be noted that the dust discharge pipe 15 is designed to absorb and discharge the dust inside the vacuum hopper 1. The dust discharge pipe 15 is located above the first recessed plate 2 and the second recessed plate 3, which facilitates the absorption of dust on the filter element 12. Furthermore, a negative pressure state is formed through the diversion pipe 14 to achieve the absorption of dust.

[0048] In this embodiment, preferably, the lower part of the diversion pipe 14 is connected to an inverted venturi tube 16, and the lower part of the venturi tube 16 is fixedly connected to a spiral feed pipe 17.

[0049] It should be noted that the inverted Venturi tube 16 can reduce the intake of external airflow, effectively control the intensity of negative pressure, and the Venturi tube 16, together with the spiral feed tube 17, facilitates the spiral feeding of dust, making it easy to discharge the dust and preventing it from being sucked into the vortex air pump 29.

[0050] In this embodiment, preferably, a discharge pipe 33 is fixedly provided at the bottom of the vacuum hopper 1. A butterfly valve plate 24 is movably installed inside the discharge pipe 33 via a rotating shaft 23. The butterfly valve plate 24 is movably located inside the discharge pipe 33. One end of the rotating shaft 23 is movably connected to the inner wall of the discharge pipe 33, and the other end of the rotating shaft 23 passes through the discharge pipe 33. A positioning cylinder 25 is welded to the outside of the discharge pipe 33. One end of the rotating shaft 23 is threadedly connected to the inside of the positioning cylinder 25. A rotating handwheel 26 is fixedly provided at the end of the rotating shaft 23.

[0051] It should be noted that the discharge pipe 33 is designed to discharge the extracted calcium carbonate powder, and the butterfly valve plate 24 is installed through the positioning cylinder 25 and the rotating shaft 23. The rotation is adjusted by rotating the handwheel 26, which facilitates the control and adjustment of the discharge pipe 33.

[0052] The specific operational procedures for this application are as follows:

[0053] When in use, start the vortex air pump 29. The vortex air pump 29 can extract the airflow inside the vacuum hopper 1, so that the vacuum hopper 1 can form a negative pressure state. Then the operator inserts the suction pipe 32 into the calcium carbonate powder to extract the calcium carbonate powder under negative pressure. The powder is then fed into the vacuum hopper 1 through the feed pipe 31 and discharged from the discharge pipe 33 under the action of gravity for packaging or storage.

[0054] Furthermore, after the calcium carbonate powder enters the vacuum hopper 1, some dust will flow with the airflow. That is, under the action of negative pressure, the negative pressure is greater than the elastic force of the first spring 4, causing the first limiting plate 5 to be pulled up. At this time, an airflow is formed inside the vacuum hopper 1, realizing the negative pressure extraction of calcium carbonate powder. The airflow will drive the rotating blade 8 to rotate, so that large particles of calcium carbonate powder will not flow with the airflow, causing the isolation mesh plate 10 to be blocked. Dust enters the upper part of the vacuum hopper 1 through the diversion port 9 and the isolation mesh plate 10, and after being filtered by the filter element 12, a large amount of dust accumulates in the filter element 12, causing the filter element 12 to be blocked. When the air pressure inside the vacuum hopper 1 decreases, the elastic force of the first spring 4 is greater than the negative pressure, pushing the first limiting plate 5 to the exhaust port 6. This process seals the exhaust port 6, increases the airflow and pressure within the diversion pipe 14, compresses the second spring 20, and causes the second limiting plate 21 to disengage from the contact surface. Air is then drawn through the overflow hole 22, and dust is extracted from the filter element 12 through the dust discharge pipe 15. The external airflow is reduced through the venturi tube 16, allowing the dust to be discharged through the spiral feed pipe 17, thus cleaning the filter element 12. After the filter element 12 is cleaned, the negative pressure inside the vacuum hopper 1 increases, causing the first limiting plate 5 to be sucked up again. The second limiting plate 21, due to reduced pressure, seals the diversion pipe 14 again. This allows for automated start-stop control without stopping the machine and also enables the cleaning of the negative pressure suction machine.

[0055] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An automatic start-stop negative pressure feeding machine for processing calcium carbonate powder, characterized in that: Includes a vacuum hopper (1), wherein a first recessed disc (2) and a second recessed disc (3) are fixedly installed at the upper end of the interior of the vacuum hopper (1), and the first recessed disc (2) and the second recessed disc (3) are connected to each other in opposite directions; The first recessed plate (2) has an exhaust port (6) in the middle. The second recessed plate (3) has a first spring (4) fixedly installed in the middle of its lower part. The bottom end of the first spring (4) is fixedly connected to a first limiting plate (5). The first limiting plate (5) is engaged inside the exhaust port (6). The outer side of the first spring (4) is provided with a bearing ring (7). A rotating blade (8) is movably installed on the bearing ring (7). The edge of the second recessed disc (3) is provided with several diversion ports (9), and an isolation mesh plate (10) is fixedly installed inside each of the several diversion ports (9). A positioning post (11) is fixedly installed in the middle of the second recessed disc (3). An air extraction pipe (27) is provided at the upper end of the vacuum hopper (1). A positioning ring (13) is fixedly installed inside the vacuum hopper (1) on the outside of the air extraction pipe (27). A filter element (12) is engaged between the positioning ring (13) and the positioning post (11).

2. The automatic start-stop negative pressure feeding machine for calcium carbonate powder processing according to claim 1, characterized in that: One side of the extraction pipe (27) is connected to a diversion pipe (14), and the inside of the diversion pipe (14) is provided with an installation groove (18), the inner diameter of the installation groove (18) being larger than the inner diameter of the diversion pipe (14).

3. The automatic start-stop negative pressure feeding machine for calcium carbonate powder processing according to claim 2, characterized in that: The mounting groove (18) is fixedly provided with a positioning wing (19), and a second spring (20) is fixedly provided on one side of the positioning wing (19). A second limiting plate (21) is fixedly connected to one end of the second spring (20). The second limiting plate (21) is movably located inside the mounting groove (18), and the diameter of the second limiting plate (21) is larger than the inner wall diameter of the diversion pipe (14).

4. The automatic start-stop negative pressure feeding machine for calcium carbonate powder processing according to claim 3, characterized in that: The second limiting plate (21) has a plurality of overflow holes (22) on its outer side. The plurality of overflow holes (22) are arranged circumferentially, and the inner diameter of the plurality of overflow holes (22) is larger than the inner wall diameter of the diversion pipe (14).

5. The automatic start-stop negative pressure feeding machine for calcium carbonate powder processing according to claim 1, characterized in that: A negative pressure pipe (28) is connected to the air extraction pipe (27), one end of which is connected to the vortex air pump (29), and a mounting base plate (30) is fixedly connected to the bottom of the vortex air pump (29).

6. The automatic start-stop negative pressure feeding machine for calcium carbonate powder processing according to claim 1, characterized in that: The vacuum hopper (1) is connected to a feed pipe (31) in the middle. The feed pipe (31) is located at the lower part of the first recessed plate (2) and the second recessed plate (3). One end of the feed pipe (31) is fixedly connected to a suction pipe (32).

7. The automatic start-stop negative pressure feeding machine for calcium carbonate powder processing according to claim 4, characterized in that: The upper end of the vacuum hopper (1) is connected to a dust discharge pipe (15), which is located on the upper part of the first recessed plate (2) and the second recessed plate (3). One end of the dust discharge pipe (15) is fixedly connected to the diversion pipe (14).

8. The automatic start-stop negative pressure feeding machine for calcium carbonate powder processing according to claim 7, characterized in that: The lower part of the diverter (14) is connected to an inverted venturi tube (16), and the lower part of the venturi tube (16) is fixedly connected to a spiral feed tube (17).

9. The automatic start-stop negative pressure feeding machine for calcium carbonate powder processing according to claim 1, characterized in that: The bottom of the vacuum hopper (1) is fixedly provided with a discharge pipe (33), and a butterfly valve plate (24) is movably installed inside the discharge pipe (33) via a rotating shaft (23). The butterfly valve plate (24) is movably located inside the discharge pipe (33).

10. The automatic start-stop negative pressure feeding machine for calcium carbonate powder processing according to claim 9, characterized in that: One end of the rotating shaft (23) is movably connected to the inner wall of the discharge pipe (33), and the other end of the rotating shaft (23) passes through the discharge pipe (33). A positioning cylinder (25) is welded to the outside of the discharge pipe (33). One end of the rotating shaft (23) is threaded to the inside of the positioning cylinder (25), and a rotating handwheel (26) is fixedly provided at the end of the rotating shaft (23).

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