Dust filtering device for vacuum dryer

Abstract

The present application relates to the technical field related to accessories for dryers, and discloses a dust filtering device for a vacuum dryer. In order to solve the problem that the filtering device is prone to agglomeration and clogging, a cylindrical filter element is fixedly arranged inside a vacuum tank, and during the rotation of the vacuum tank, the filter element rotates synchronously with the vacuum tank, and a dust cleaning sleeve is mounted on the outer side of the filter element. When the filter element rotates with the vacuum tank, the dust cleaning sleeve reciprocates on the outer side of the filter element, and the two ends of the dust cleaning sleeve are used to scrape the outer side of the filter element to avoid the phenomenon of dust material agglomerating and clogging on the outer side of the filter element, thereby finally achieving continuous filtering and periodic cleaning effects.

Description

Technical Field

[0001] The present application relates to the technical field related to accessories for dryers, and in particular to a dust filtering device for a vacuum dryer. Background Art

[0002] A vacuum dryer is a device that is specially used for drying materials. It uses an efficient vacuum system to extract the air inside the packaging container or drying chamber to achieve a predetermined vacuum degree, thereby removing the moisture from the materials in the container or drying chamber. Taking the double-conical vacuum dryer as an example, its working principle is to extract the air in the drying chamber through a vacuum pump to create a low-pressure or even nearly airless vacuum environment. In this state, steam or hot water is introduced into the jacket of the dryer, and the heat of these heat media will be transferred to the wet material through the inner wall of the tank. After the wet material is heated, the moisture inside it begins to evaporate, and the formed water vapor is then quickly extracted from the drying chamber by the vacuum pump through the vacuum exhaust pipe.

[0003] Since the drying chamber is maintained in a vacuum state and the double-conical tank body rotates at a low speed during the drying process, the material can be turned up and down and inside and outside in the tank body, thereby greatly increasing the contact area between the material and the heat source, further accelerating the drying speed of the material, improving the drying efficiency, and ensuring that the material can be dried evenly.

[0004] However, in actual applications, a filter device is often installed at the vacuum port of the vacuum dryer to prevent the powdered raw materials from being drawn into the vacuum pump body along with the gas, thereby protecting the normal operation of the vacuum pump. However, during long-term operation, due to the continuous suction of the vacuum, powder will gradually accumulate on the filter device, causing blockage. In addition, when the tank is sucked, the water vapor or water medium generated during the drying process will also be discharged through the filter device. After these water media are mixed with the blocked powder, they are easy to form agglomerates on the filter device, further aggravating the blockage of the filter device. Summary of the invention

[0005] The present application proposes a dust filtering device for a vacuum dryer, which has the advantages of continuous filtering and periodic clearing, and is used to solve the problem of easy clogging of the filtering device mentioned in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a dust filtering device for a vacuum dryer, comprising: a bracket, a vacuum tank movably installed on the top, an outer shell sleeve for medium circulation wrapped on the outside of the vacuum tank, and the heated liquid medium passes through the outside of the vacuum tank to dry the material inside the vacuum tank; a drying chamber is provided inside the vacuum tank, and a material valve is fixedly connected to one end of the vacuum tank to control the entry and exit of the material; a filter element is provided on the inside of the vacuum tank, an exhaust ring is movably installed on one end of the filter element, a connecting pipe is fixedly connected to one side of the vacuum tank, and the connecting pipe and the exhaust ring are connected The connecting pipe is connected to the Roots vacuum pump exhaust component. When the Roots vacuum pump exhaust component is working, the interior of the filter element is connected to the Roots vacuum pump exhaust component through the connecting pipe and the exhaust ring to form a vacuum exhaust structure; a filter groove is provided on the outside of the filter element. When the inside of the filter element is affected by the Roots vacuum pump exhaust component and a relative vacuum is generated, the water vapor in the drying chamber enters the inside of the filter element from the filter groove; a dust cleaning sleeve is provided on the outside of the filter element. When the vacuum tank rotates, the dust cleaning sleeve reciprocates along the filter element to remove dust on the outside of the filter element; a control center is fixed on the surface of the bracket to regulate the drying process.

[0007] Further, the vacuum tank has a double cone shape.

[0008] Furthermore, it also includes an auxiliary push clearing block and a main push clearing block, both of which are movably installed on the side of the cleaning sleeve and are respectively located in the filter tank, the auxiliary push clearing block is close to one end of the cleaning sleeve, and the main push clearing block is close to the other end of the cleaning sleeve.

[0009] Furthermore, an auxiliary push scraper block located on one side of the auxiliary push block clearing block is movably installed on the outer side of the dust cleaning sleeve, and an auxiliary push spring is connected between the auxiliary push block clearing block and the auxiliary push scraper block; a main push scraper block located on one side of the main push block clearing block is movably installed on the outer side of the dust cleaning sleeve, and a main push spring is connected between the main push scraper block and the main push block clearing block.

[0010] Furthermore, one end of the main push clearing block is fixedly connected to a moving magnetic block, and the outer side of the cleaning sleeve is fixedly connected to an electromagnet corresponding to the moving magnetic block. When the electromagnet is energized, a magnetic field that repels the moving magnetic block is generated.

[0011] Furthermore, a distribution ring made of non-conductive material is installed on the rotating shaft of the vacuum tank, and a conductive arc block is fixedly connected to the side of the distribution ring. The distribution ring and the conductive arc block form an annular structure. Two detection electric contact pins are fixed on the top of the bracket. The two detection electric contact pins are arranged in contact with the annular structure. When the two detection electric contact pins are in contact with the conductive arc block, the electromagnet is connected to the power supply. When at least one of the detection electric contact pins is in contact with the distribution ring and loses contact with the conductive arc block, the power supply to the electromagnet is stopped.

[0012] Furthermore, the conductive arc block is in the shape of a metal semicircular ring.

[0013] Furthermore, the elastic force of the auxiliary thrust spring is greater than the elastic force of the main thrust spring.

[0014] Furthermore, a deflection disk is fixedly connected to the inner end of the vacuum tank, and a deflection tooth is fixedly connected to the surface of the deflection disk; a deflection rod is fixedly connected to the end of the main push clearing block; a transposition groove is opened in the middle of the filter element, and a support ring is fixedly connected to the inner side of the filter element.

[0015] Furthermore, the surface shape of the deflection tooth is a right triangle.

[0016] The present invention has the following beneficial effects:

[0017] The present application provides a dust filtering device for a vacuum dryer, the core component of which is a cylindrical filter element fixedly installed inside, and the filter element is located at the center of the vacuum tank. When the vacuum tank rotates during operation, the filter element will rotate synchronously with it. In order to ensure the efficient operation of the filter element, a dust cleaning device is specially designed, including a dust cleaning sleeve that closely matches the filter element.

[0018] The dust cleaning sleeve is installed on the outside of the filter element. When the vacuum tank and the filter element rotate together, the dust cleaning sleeve will reciprocate along the outer surface of the filter element. Through the angled structure at both ends of the dust cleaning sleeve, it can effectively scrape off the dust material attached to the outside of the filter element, thereby avoiding dust agglomeration and clogging that may occur due to long-term filtration.

[0019] This design combining continuous filtration with periodic clearing not only ensures the efficient operation of the vacuum dryer, but also significantly extends the service life of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0021] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0022] Figure 1 It is a schematic diagram of the overall external three-dimensional structure;

[0023] Figure 2 It is a schematic diagram of the overall internal three-dimensional cross-sectional structure;

[0024] Figure 3 It is a schematic diagram of the overall internal planar cross-sectional structure;

[0025] Figure 4 for Figure 3 The enlarged structural diagram at E in the middle;

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the filter element;

[0027] Figure 6 This is a schematic diagram of the installation of the distribution ring and its three-dimensional shape;

[0028] Figure 7 It is a cross-sectional view of the dust removal sleeve and a three-dimensional schematic diagram of its internal structures;

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the deflection disk;

[0030] Fig. 9 It is a schematic diagram of the position between the deflection disk and the deflection rod;

[0031] Fig.10 This is a schematic diagram of the circuit control of the electromagnet.

[0032] In the figure: 1. bracket; 2. control center; 3. vacuum tank; 300. drying chamber; 301. material valve; 4. filter element; 400. filter trough; 401. transposition trough; 402. support ring; 5. dust cleaning sleeve; 6. deflection plate; 600. deflection tooth; 7. auxiliary push scraper block; 700. auxiliary push spring; 701. auxiliary push clearing block; 8. main push scraper block; 800. main push spring; 9. exhaust ring; 10. connecting pipe; 11. distribution ring; 110. conductive arc block; 12. detection electric contact needle; 13. main push clearing block; 130. deflection rod; 14. moving magnetic block; 140. electromagnet. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] Embodiment 1

[0035] See also Figure 1 It can be seen that the bracket 1 plays a supporting role for the entire component. A vacuum tank 3 is movably installed on the top of the bracket 1. The vacuum tank 3 is in a double cone shape, wherein the outer side of the vacuum tank 3 is wrapped with an outer shell for medium circulation. The heated liquid medium passes through the outer side of the vacuum tank 3 to dry the material inside the vacuum tank 3. The output shaft of the vacuum tank 3 is connected to the motor to ensure that the vacuum tank 3 can rotate so that the material inside the vacuum tank 3 can be evenly heated. Specifically, the control center 2 fixed on the surface of the bracket 1 is used for regulation to ensure that the drying of the material can run stably.

[0036] refer to Figure 2It can be seen that a drying chamber 300 is provided inside the vacuum tank 3, and a material valve 301 is fixedly connected to one end of the vacuum tank 3. When the material valve 301 is opened, the material can be fed into the drying chamber 300. During drying, the material valve 301 is closed. Similarly, when the dried material needs to be poured out, the material valve 301 can be opened. The inner side of the vacuum tank 3 has a filter element 4 fixedly connected by bolts. Figure 2 and Figure 3 It can be clearly seen that the rotation axis of the vacuum tank 3 and the center line of the filter element 4 are perpendicular to each other. When the vacuum tank 3 rotates, the two ends of the filter element 4 will follow the vacuum tank 3 to perform circular motion. Figure 2 and Figure 3 It can be seen that an exhaust ring 9 is movably installed at one end of the filter element 4, and a connecting pipe 10 is fixedly connected to one side of the vacuum tank 3. The connecting pipe 10 and the exhaust ring 9 are connected by a metal air pipe. Since one end of the connecting pipe 10 is generally connected to the exhaust component, when the exhaust component is sucking, the connecting pipe 10, the metal air pipe and the connecting pipe 10 are unblocked, so that the interior of the filter element 4 and the exhaust component are connected.

[0037] refer to Figure 5 It can be seen that the outside of the filter element 4 is provided with a plurality of filter slots 400 arranged at equal angles. When the inside of the filter element 4 is affected by the vacuum assembly, the moisture in the drying chamber 300 will move from the filter slots 400 to the inside of the filter element 4, and finally the moisture will be extracted.

[0038] In this embodiment, the air extraction component may be a pump that can extract water vapor but cannot extract dry materials; or the spacing between the filter slots 400 is set to be smaller than the particle size of the material to be dried.

[0039] In order to clean the debris (dust particles, etc.) on the outer wall of the filter tank 400, Figure 2 and Figure 3 It can be clearly seen that a dust cleaning sleeve 5 is sleeved on the outer side of the filter element 4, and both ends of the dust cleaning sleeve 5 are provided with bevels.

[0040] During specific implementation, the material is poured into the drying chamber 300 through the material valve 301, and the vacuum tank 3 is rotated by adjusting the control center 2. At the same time, a circulating heating medium is introduced to the outside of the vacuum tank 3, so as to dry the material inside the vacuum tank 3.

[0041] The vacuum assembly is started to extract the water vapor generated by drying inside the vacuum tank 3. Figure 3 For example, at this time, the filter element 4 rotates to a horizontal state, and the material is at the bottom of the vacuum tank 3. At the next moment, as the vacuum tank 3 Figure 3Rotating counterclockwise will cause the right side of the filter element 4 to tilt upward, and the cleaning sleeve 5 will slide on the outside of the filter element 4 due to the influence of gravity, and the dust material gathered on the outside of the filter element 4 will be shoveled out into the drying chamber 300 by utilizing the oblique angle at the end of the cleaning sleeve 5. At the same time, since the cleaning sleeve 5 blocks the left side of the filter element 4, when the vacuum tank 3 is rotated to ninety degrees, the material is still at the bottom of the inner cavity of the drying chamber 300 (the material valve 301 has been rotated to the bottom at this time), and the cleaning sleeve 5 blocks the left side of the filter element 4, thereby avoiding contact between the bottom material and the filter element 4, and reducing the risk of the filter tank 400 being blocked.

[0042] As the vacuum tank 3 rotates continuously, the dust cleaning sleeve 5 will also reciprocate along the filter element 4, so as to shovel out the dust raw materials gathered on the outside of the filter element 4. Finally, when the drying is completed, the material valve 301 is opened to pour out the dried material.

[0043] Embodiment 2

[0044] For further improvements based on Example 1, please refer to Figure 3 and Figure 4 It can be seen that the side of the cleaning sleeve 5 is movably installed with an auxiliary push cleaning block 701 and a main push cleaning block 13, and the auxiliary push cleaning block 701 and the main push cleaning block 13 are both located in the filter tank 400. Since the auxiliary push cleaning block 701 is close to one end of the cleaning sleeve 5 and the main push cleaning block 13 is close to the other end of the cleaning sleeve 5, when the cleaning sleeve 5 performs periodic reciprocating motion along the filter element 4, the auxiliary push cleaning block 701 and the main push cleaning block 13 are moved in the filter tank 400, thereby clearing out the dust materials blocked in the filter tank 400, thereby preventing the filter tank 400 from being blocked by dust materials and causing failure to filter.

[0045] Embodiment 3

[0046] For further improvements based on Example 2, please refer to Figure 3 , Figure 4 and Figure 7 It can be clearly seen that the outer side of the cleaning sleeve 5 is movably installed with an auxiliary push scraper block 7 located on one side of the auxiliary push clean block 701, and an auxiliary push spring 700 is connected between the auxiliary push clean block 701 and the auxiliary push scraper block 7, and the auxiliary push scraper block 7 is pushed to the inner side of the vacuum tank 3 by the elastic force of the auxiliary push spring 700. At the same time, the auxiliary push clean block 701 is pushed into the filter tank 400 by the elastic force of the auxiliary push spring 700; similarly, the outer side of the cleaning sleeve 5 is movably installed with a main push scraper block 8 located on one side of the main push clean block 13, and a main push spring 800 is connected between the main push scraper block 8 and the main push clean block 13, and the main push scraper block 8 is pushed to the inner side of the vacuum tank 3 by the elastic force of the main push spring 800.

[0047] Due to the elastic force of the auxiliary push spring 700 and the main push spring 800, the auxiliary push scraper block 7 and the main push scraper block 8 are always pushed against the inner side of the vacuum tank 3. As mentioned above, the heating of the vacuum tank 3 is currently carried out by providing an outer shell sleeve on the outside of the vacuum tank 3 for the circulation of the heating medium. This means that the inner wall of the vacuum tank 3 is the main part for drying the dust material. Due to the presence of moisture in the material, the material is easily adhered to the inner side of the vacuum tank 3, which in turn causes the heating of the raw material by the inner side of the vacuum tank 3 to be hindered, affecting its drying efficiency.

[0048] The method described in the third embodiment is the same as that described in the first embodiment for the rotation of the vacuum tank 3 and the feeding of the material into the drying chamber 300, and will not be described in detail here.

[0049] by Figure 3 For example, when the vacuum tank 3 rotates counterclockwise, the filter element 4 deflects upward on the right side, and the dust cleaning sleeve 5 is affected by gravity, which pushes the auxiliary push and blockage clearing block 701 to move in the filter tank 400 to clear the filter tank 400. At the same time, the dust cleaning sleeve 5 drives the auxiliary push and scraping block 7 and the main push and scraping block 8 to move synchronously to the inside of the vacuum tank 3, so that the auxiliary push and scraping block 7 and the main push and scraping block 8 are used to scrape the inside of the vacuum tank 3, so as to avoid the accumulation of materials on the inside of the vacuum tank 3. In this way, the vacuum tank 3 can dry the materials efficiently and evenly.

[0050] Embodiment 4

[0051] As a supplement to Example 3, please refer to Figure 4 , Figure 6 and Figure 7 It can be seen that in order to enhance the cleaning strength of the inner side of the vacuum tank 3 and the filter tank 400, a moving magnetic block 14 is fixedly connected to one end of the main push cleaning block 13, and an electromagnet 140 corresponding to the moving magnetic block 14 is fixedly connected to the outer side of the cleaning sleeve 5. When the electromagnet 140 is energized, a magnetic field that repels the moving magnetic block 14 is generated, thereby causing the main push cleaning block 13 to push the main push scraping block 8 to move outward.

[0052] The circuit control of the electromagnet 140 is to Figure 2 , Figure 6 and Fig.10For example, it can be seen that a power distribution ring 11 made of non-conductive material is installed on the rotating shaft of the vacuum tank 3, and a conductive arc block 110 is fixedly connected to the side of the power distribution ring 11. The conductive arc block 110 is a metal semicircular ring. The power distribution ring 11 and the conductive arc block 110 form a ring structure. Correspondingly, there is a detection electric contact pin 12 fixed by a connecting block on the top of the bracket 1, and there are two detection electric contact pins 12. The two detection electric contact pins are arranged in contact with the ring structure. When the two detection electric contact pins 12 are in contact with the conductive arc block 110, the electromagnet 140 will be connected to the power supply. Similarly, when at least one of the detection electric contact pins 12 is in contact with the power distribution ring 11 and loses contact with the conductive arc block 110, the power supply to the electromagnet 140 is stopped. Fig.10 As shown, after one pole of the power supply is connected in series with the electromagnet 140 through a wire and a protective resistor, the electromagnet 140 is electrically connected to one of the detection electric contact pins 12, and the other pole of the power supply is electrically connected to the other detection electric contact pin 12. When both detection electric contact pins 12 are in contact with the conductive arc block 110, the entire circuit is in operation, and the electromagnet 140 starts to work. If at least one of the detection electric contact pins 12 is in contact with the distribution ring 11 and loses contact with the conductive arc block 110, since the distribution ring 11 is made of non-conductive material, the entire circuit will be open, the electromagnet 140 will lose power, and will not work.

[0053] In specific implementation, the motor drives the vacuum tank 3 to rotate counterclockwise. Figure 3 For example, when the filter element 4 is in a horizontal state, at this time, one detection electric contact pin 12 is in contact with the conductive arc block 110 , and the other detection electric contact pin 12 is in contact with the power distribution ring 11 .

[0054] At the next moment, as the vacuum tank 3 rotates counterclockwise, the two detection electrical contact pins 12 are in contact with the conductive arc block 110, as shown in FIG. Figure 6 As shown, after that, as the detection electric contact pins 12 are connected, the electromagnet 140 is forced to be energized and generate magnetism that repels the moving magnetic block 14. As the moving magnetic block 14 drives the main push clearing block 13 to move upward, the strength of the main push scraping block 8 to the inside of the vacuum tank 3 is increased, as shown in FIG. Figure 3As shown, since the inner side of the vacuum tank 3 is conical, when the main push scraper block 8 pushes against the inner side of the vacuum tank 3, it will further push the cleaning sleeve 5 to move to the left. On the one hand, the strength of the main push scraper block 8 against the vacuum tank 3 increases, so that the scraping strength of the main push scraper block 8 on the inner side of the vacuum tank 3 increases, making it easier to scrape out the raw materials stuck to the inner side of the vacuum tank 3. On the other hand, the movement of the main push scraper block 8 along the inner side of the vacuum tank 3 will intensify the movement of the cleaning sleeve 5 to the left. Since the right side of the filter element 4 tilts upward when the vacuum tank 3 rotates counterclockwise, the cleaning sleeve 5 is forced to move quickly to the left side of the filter element 4 due to its own gravity and the movement of the main push scraper block 8 along the inner side of the vacuum tank 3, so that when the raw materials have not yet reached the material valve 301, the cleaning sleeve 5 has already blocked the filter tank 400 on the left side, preventing the filter tank 400 on the left side from being blocked by the raw materials.

[0055] When the main push scraper block 8 moves along the vacuum tank 3, the cleaning sleeve 5 pushed to the left simultaneously drives the auxiliary push scraper block 7 to move to the left, causing the auxiliary push scraper block 7 to scrape along the vacuum tank 3, and affected by the inner inclined surface of the vacuum tank 3, the auxiliary push spring 700 is compressed and accumulates force.

[0056] by Figure 3 For example, after the vacuum tank 3 rotates one hundred and eighty degrees counterclockwise, the filter element 4 is horizontal again. At this time, the two detection electric contact pins 12 are still in contact with the conductive arc block 110. After the next moment, one of the detection electric contact pins 12 is separated from the conductive arc block 110. At this time, the electromagnet 140 is no longer energized to generate magnetism, and the auxiliary push spring 700 pushes the auxiliary push scraper block 7 to the inner side of the vacuum tank 3 under the action of elastic force. After that, the cleaning sleeve 5 will push the cleaning sleeve 5 to move away from the material valve 301 under its own gravity and the inclined movement of the auxiliary push scraper block 7 to the vacuum tank 3, until the cleaning sleeve 5 reaches the inner end of the vacuum tank 3, which is away from the material valve 301, thereby achieving the same effect as the left movement of the cleaning sleeve 5 mentioned above.

[0057] This cycle ensures that the filter tank 400 is cleared and the dust material stuck to the inside of the vacuum tank 3 is scraped out.

[0058] It should be noted that in actual application, the elastic force of the auxiliary push spring 700 is greater than the elastic force of the main push spring 800, so as to ensure that after the electromagnet 140 no longer generates magnetism, the elastic force of the auxiliary push spring 700 forces the cleaning sleeve 5 to move away from the material valve 301, thereby ensuring that the cleaning sleeve 5 has sufficient reset strength.

[0059] Embodiment 5

[0060] Based on the fourth embodiment, since the vacuum tank 3 is double-conical, in order to make the auxiliary push scraper block 7 and the main push scraper block 8 completely scrape the inner side of the vacuum tank 3, Figure 3 , Figure 4 , Figure 8and Fig. 9 It can be clearly seen that the inner end of the vacuum tank 3 is fixedly connected with a deflection plate 6 away from the material valve 301, and the surface of the deflection plate 6 is fixedly connected with a plurality of deflection teeth 600 arranged at equal angles. Figure 8 As can be seen from the figure, the surface shape of the deflection tooth 600 is a right triangle. The end of the main push clearing block 13 is fixedly connected to a deflection rod 130 located on one side of the deflection disk 6. Fig. 9 It can be seen that, in normal state, the deflection rod 130 is located below the inclined surface of the deflection tooth 600 .

[0061] refer to Figure 5 It can be seen that a transposition groove 401 is provided in the middle of the filter element 4, and the transposition groove 401 is annular. In order to ensure the stability of the filter element 4, a support ring 402 is fixedly connected to the inner side of the filter element 4. By utilizing the support provided by the support ring 402, the position where the transposition groove 401 is located can still maintain a certain compressive strength after cutting, thereby ensuring the stability of the equipment in the later operation.

[0062] In specific implementation, Figure 3 For example, at this time, the filter element 4 is in a horizontal state, and the electromagnet 140 is not energized. At the next moment, as the detection electric contact pins 12 are connected by the conductive arc block 110, the electromagnet 140 is energized to generate magnetism. Figure 4 It can be seen that since the main push spring 800 has a certain elasticity, and as mentioned in the fourth embodiment, the elasticity of the main push spring 800 is smaller than the elasticity of the auxiliary push spring 700, when the moving magnetic block 14 drives the main push clearing block 13 to move upward, the deflection rod 130 moves upward synchronously. Fig. 9 When the deflection rod 130 moves upward, it will hit the inclined surface of the deflection tooth 600, thereby forcing the cleaning sleeve 5 to rotate. At this time, the cleaning sleeve 5 drives the auxiliary push cleaning block 701 to rotate in the transposition groove 401.

[0063] When the deflection rod 130 moves upward and completely disengages from the deflection tooth 600, the auxiliary push block 701 rotates to the next filter slot 400. As the main push block 13 continues to move upward, it pushes the main scraper block 8 to move along the vacuum tank 3. After that, the cleaning sleeve 5 is affected by the movement of the main scraper block 8 along the vacuum tank 3 and moves to the left side of the filter element 4. The auxiliary push block 701 moves along the filter slot 400 and clears out the dust materials blocked in the filter slot 400 through the auxiliary push block 701.

[0064] Afterwards, when the vacuum tank 3 rotates one hundred and eighty degrees, the next moment, the auxiliary push spring 700 pushes the auxiliary push scraper block 7 to move along the vacuum tank 3, so that the cleaning sleeve 5 moves in the direction away from the material valve 301. At the same time, when the electromagnet 140 is de-energized, the main push clearing block 13 is also pushed into the filter tank 400 by the elastic force of the main push spring 800, and moves on the filter element 4 with the cleaning sleeve 5, so that the dust materials blocked in the filter tank 400 are cleared out.

[0065] Finally, the elastic force of the auxiliary push spring 700 will make the auxiliary push clearing block 701 move to the transposition groove 401 again. At this time, the deflection rod 130 is again under the next deflection tooth 600, waiting for the vacuum tank 3 to rotate 180 degrees again, and then follow the above working cycle.

[0066] Finally, when the material is dried, it can be poured out from the material valve 301.

Claims

1. A dust filtering device for a vacuum dryer, comprising: A bracket (1), a vacuum tank (3) is movably mounted on the top of the bracket (1), the outer side of the vacuum tank (3) is wrapped with an outer shell for medium circulation, and the heated liquid medium passes through the outer shell of the vacuum tank (3) to dry the material inside the vacuum tank (3); a drying chamber (300) is arranged inside the vacuum tank (3), and one end of the vacuum tank (3) is fixedly connected to a material valve (301) for controlling the entry and exit of materials; the vacuum tank (3) is characterized in that a filter element (4) is arranged on the inner side of the vacuum tank (3), an exhaust ring (9) is movably mounted on one end of the filter element (4), a connecting pipe (10) is fixedly connected to one side of the vacuum tank (3), the connecting pipe (10) and the exhaust ring (9) are connected, the connecting pipe (10) is connected to an exhaust component, and when the exhaust component is in operation, the interior of the filter element (4) is connected to the exhaust component through the connecting pipe (10) and the exhaust ring (9), thereby forming an exhaust structure; A filter groove (400) is provided on the outside of the filter element (4), and when the inside of the filter element (4) is affected by the air extraction component, water vapor in the drying chamber (300) enters the inside of the filter element (4) from the filter groove (400); A dust cleaning sleeve (5) is sleeved on the outer side of the filter element (4); when the vacuum tank (3) rotates, the dust cleaning sleeve (5) reciprocates along the filter element (4) to remove dust on the outer side of the filter element (4); A control center (2) is fixed on the surface of the support (1) for regulating the drying process; It also includes an auxiliary push clearing block (701) and a main push clearing block (13), both of which are movably mounted on the side of the cleaning sleeve (5) and are respectively located in the filter tank (400), the auxiliary push clearing block (701) being close to one end of the cleaning sleeve (5), and the main push clearing block (13) being close to the other end of the cleaning sleeve (5); An auxiliary push scraper block (7) located on one side of the auxiliary push block clearing block (701) is movably mounted on the outer side of the dust cleaning sleeve (5), and an auxiliary push spring (700) is connected between the auxiliary push block clearing block (701) and the auxiliary push scraper block (7); A main push scraper block (8) located on one side of the main push block clearing block (13) is movably mounted on the outer side of the dust cleaning sleeve (5), and a main push spring (800) is connected between the main push scraper block (8) and the main push block clearing block (13); The vacuum tank (3) is in a double cone shape; The rotation axis of the vacuum tank (3) and the center line of the filter element (4) are perpendicular to each other. When the vacuum tank (3) rotates, the two ends of the filter element (4) follow the vacuum tank (3) to perform circular motion.

2. The dust filtering device for vacuum drying machine according to claim 1, characterized in that: One end of the main push clearing block (13) is fixedly connected to a moving magnetic block (14), and the outer side of the dust cleaning sleeve (5) is fixedly connected to an electromagnet (140) corresponding to the moving magnetic block (14). When the electromagnet (140) is energized, a magnetic field that repels the moving magnetic block (14) is generated.

3. The dust filtering device for vacuum drying machine according to claim 2, characterized in that: A power distribution ring (11) is installed on the rotating shaft of the vacuum tank (3), and a conductive arc block (110) is fixedly connected to the side of the power distribution ring (11), and a detection electric contact pin (12) is fixed to the top of the bracket (1); a power distribution ring (11) made of non-conductive material is installed on the rotating shaft of the vacuum tank (3), and a conductive arc block (110) is fixedly connected to the side of the power distribution ring (11), the power distribution ring (11) and the conductive arc block (110) form an annular structure, and two detection electric contact pins (12) are fixed to the top of the bracket (1), and the two detection electric contact pins (12) are arranged in contact with the annular structure. When both detection electric contact pins (12) are in contact with the conductive arc block, the electromagnet (140) is connected to the power supply, and when at least one of the detection electric contact pins (12) is in contact with the power distribution ring (11) and is out of contact with the conductive arc block (110), the power supply to the electromagnet (140) is stopped.

4. The dust filtering device for vacuum drying machine according to claim 3, characterized in that: The conductive arc block (110) is in the shape of a metal semicircular ring.

5. The dust filtering device for vacuum drying machine according to claim 3, characterized in that: The elastic force of the auxiliary thrust spring (700) is greater than the elastic force of the main thrust spring (800).

6. The dust filtering device for a vacuum dryer according to claim 3 or 5, characterized in that: The inner end of the vacuum tank (3) is fixedly connected to a deflection disk (6), and the surface of the deflection disk (6) is fixedly connected to a deflection tooth (600); A deflection rod (130) is fixedly connected to the end of the main push clearing block (13); A transposition groove (401) is provided in the middle of the filter element (4), and a support ring (402) is fixedly connected to the inner side of the filter element (4).

7. The dust filtering device for vacuum drying machine according to claim 6, characterized in that: The surface shape of the deflection tooth (600) is a right triangle.

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