Impurity filtering device for dark tea extraction

Abstract

The present invention discloses an impurity filtration device for dark tea extraction, and relates to the technical field of filtration, the impurity filtration device comprises an outer shell, and further comprises: a rotary drum shell which is of an hourglass-shaped structure and is arranged in the outer shell, and the top end of the inner side wall of the rotary drum shell is provided with a filter screen mounting groove and a filter groove for discharging filtrate; the rotary drum is driven by a driving motor, is of a hourglass-shaped structure and is rotationally arranged in the rotary drum shell, the bottom of the outer side wall of the rotary drum is provided with a lower spiral, the top of the outer side wall of the rotary drum is provided with an upper spiral, the bottom end of the outer side wall of the rotary drum is provided with a liquid outlet, and the top end of the rotary drum is provided with a decompression reflux inlet; compared with a filtering device in the traditional technology, the tea filtering device has the advantages that the rotatable drum is designed to drive tea liquid to rotate, so that filtrate and impurities are separated under the action of centrifugal force, the filtering effect of the device is improved, the filtrate actively penetrates through the filter screen under the action of centrifugal force, and the filtering efficiency of the device is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of filtration, in particular to an impurity filtering device for extracting black tea. Background Art

[0002] As a post-fermented tea, dark tea contains a large amount of theabrownin, which is a pure natural substance extracted from cooked tea by modern physical technology without any additives. The ultrafiltration method separates possible pesticide residues, heavy metals, bacteria and other ingredients that are harmful to human health. It is very beneficial to improve the overall metabolic balance of the human body and has a significant effect on lowering blood sugar, blood lipids, blood pressure, uric acid, etc. In the process of extraction and processing of dark tea, it is necessary to filter the tea liquid of dark tea to separate insoluble impurities for subsequent processing.

[0003] For example, a device for filtering impurities for extracting theabrownin from black tea, which is disclosed in Chinese patent publication number CN216366946U, comprises a filtering mechanism, wherein the filtering mechanism comprises a rectangular box, a discharge port is provided at the bottom of one side of the rectangular box, and a discharge valve is fixedly connected to a position corresponding to the discharge port on one side of the rectangular box, a feed port is provided at the middle position of the top of the rectangular box, a hopper is fixedly connected to a position corresponding to the feed port on the top of the rectangular box, and three rectangular holes are equidistantly provided on the other side of the rectangular box. In the utility model, filter screen 1, filter screen 2 and filter screen 3 are provided inside the rectangular box, and the feed port and the hopper are used to facilitate the injection of the black tea theabrownin extract into the rectangular box, and the black tea theabrownin extract is filtered in sequence by using filter screen 1, filter screen 2 and filter screen 3, and the mesh numbers of filter screen 1, filter screen 2 and filter screen 3 are increased in sequence, thereby improving the use effect of the device for filtering impurities for extracting theabrownin from black tea.

[0004] The above-mentioned filtering device has some problems when filtering black tea. The insoluble impurities in the tea are generally in a suspended state, which are easy to adhere to the surface of the filter during filtration, which is not conducive to the filtration work. Moreover, the suspended impurities are only filtered and separated by the filter, which has a poor effect and low efficiency.

[0005] Therefore, it is necessary to invent a kind of impurity filtering device for black tea extraction to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide an impurity filtering device for extracting dark tea, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: an impurity filtering device for extracting dark tea, comprising an outer shell, and further comprising: The drum shell is an hourglass-shaped structure and is arranged inside the outer shell, and a filter installation groove and a filter groove for discharging filtrate are arranged on the top of the inner wall; The drum driven by the driving motor is set to an hourglass structure and is rotatably arranged inside the drum shell. The bottom of the outer wall is provided with a lower spiral, the top of the outer wall is provided with an upper spiral, the bottom end of the outer wall is provided with a liquid outlet, and the top end is provided with a decompression reflux port; The filter screen is configured as a funnel-shaped structure and is located inside the filter screen installation slot, and a plurality of protrusions are arranged in a circumferential array on the inner wall thereof; A slag discharge cover and a slag discharge port, both of which are arranged on the inner wall of the outer shell; A plurality of scraper assemblies are arranged in a circular array on the outer top of the drum. An electromagnetic drive unit is disposed on the top of the outer shell; The scraper assembly includes a "U"-shaped fixed block, which is placed on the side wall of the drum, with a guide column on the top, and two accommodating grooves symmetrically opened on the top. The side wall of the accommodating groove is provided with a vertical guide groove, an inclined guide groove and a horizontal slide groove, and the inner wall of the horizontal slide groove is connected to the limit block through an elastic reset member; The elastic deformation member is slidably sleeved on the guide column, and a scraper and a plurality of resetting elastic parts are provided at the bottom thereof; the scraper is placed between the two side walls of the "U"-shaped fixed block; Two limit sliding columns, one end of which is slidably placed in the receiving groove, and the other end of which slides through the elastic deformation member, a magnet is provided on the top, and a guide block is provided on the peripheral side wall thereof to cooperate with the vertical guide groove; A reset component is arranged at the bottom of the containing groove.

[0008] Preferably, the method further comprises: the top of the limit block is an inclined surface, and the inclined surface is flush with the bottom wall of the inclined guide groove; The vertical guide groove is opened at one end of the accommodating groove close to the side wall of the rotating drum, the oblique guide groove is opened at the middle side wall of the vertical guide groove, and the horizontal slide groove is opened at the middle side wall of the vertical guide groove.

[0009] Preferably, the reset assembly further includes a reset plate, and the reset plate is connected to the bottom wall of the accommodating groove via an elastic reset member.

[0010] Preferably, it further comprises: a base, which is located at the bottom end of the outer shell, the drive motor is placed in the middle of the lower surface of the base, and the output shaft of the drive motor is connected to the bottom end of the drum.

[0011] Preferably, it further comprises: a guide block, which is set to be an annular structure and is located at the inner upper end of the drum, and the cross section of the guide block is set to be a triangular structure, and the guide block is located below the pressure reduction reflux port; The flow dividing block is set to a conical structure and is located at the inner bottom end of the rotating cylinder. The flow dividing block is used to disperse the fluid entering the rotating cylinder and disperse it through the liquid outlet.

[0012] Preferably, it also includes: a feed cover, which is configured as a funnel-shaped structure and is located at the inner top of the rotating drum; A guide groove is provided in a strip-shaped structure and is located on the inner side wall of the feed cover, and a plurality of guide grooves are provided; The flow guide pipe is located at the bottom end of the feed shield and extends to the inner middle part of the drum.

[0013] Preferably, it also includes: a filter pressing ring, which is set as an annular structure and is located at the top of the outer shell, and the lower surface of the filter pressing ring is in contact with the drum shell and the top of the filter screen, and the side wall of the filter pressing ring is provided with a channel for the filter residue to pass through.

[0014] Preferably, it further comprises: a slag discharge pipe connected to the slag discharge port is provided on the peripheral side wall of the outer shell, and the filtered slag in the slag discharge cover is discharged through the slag discharge pipe; A drain pipe is provided through the bottom end of the outer shell, and the filtrate filtered by the filter screen is discharged through the drain pipe.

[0015] Preferably, it also includes: a liquid inlet pipe, which is located in the middle of the top of the slag discharge hood and extends to the inside of the feed hood.

[0016] Preferably, it further comprises: a support screw rod, which is located above the base; The connecting ear is located on the outside of the outer shell and the filter pressing ring. The support screw and the connecting ear are used to limit the position of the outer shell and the filter pressing ring.

[0017] Technical effects and advantages of the present invention: 1. The present invention provides an outer shell, a drum shell is provided inside the outer shell, a drum is provided inside the drum shell, the outer shell, the drum shell and the drum are all configured as an hourglass structure, and a liquid outlet is provided at the outer bottom end of the drum, so that the tea liquid to be filtered can enter the drum, and pass through the liquid outlet into between the drum shell and the drum under the rotation of the drum, and the drum can realize the transportation of the tea liquid from bottom to top through the lower spiral and upper spiral of the outer side thereof, and during the transportation of the tea liquid, the pure filtrate in the tea liquid adheres to the inner wall of the drum shell under the action of centrifugal force, and this process can realize the separation of the filtrate and impurities, and the separated filtrate is filtered through the filter net at the top inner side of the drum shell and then discharged. Compared with the filtering device in the traditional technology, the present technical scheme drives the tea liquid to rotate by designing a rotatable drum, so that the filtrate and impurities are separated under the action of centrifugal force, thereby improving the filtering effect of the device, and the filtrate actively passes through the filter net under the action of centrifugal force, further improving the filtering efficiency of the device.

[0018] 2. The present invention sets a decompression reflux port at the top of the drum. When the tea liquid is transported to the top of the drum shell for filtration and discharge, the excess tea liquid can flow back into the drum through the decompression reflux port to avoid the filter screen being damaged by the high pressure of the compressed tea liquid, thereby protecting the filter screen. Moreover, the filtrate is away from the decompression reflux port under the action of centrifugal force, thereby protecting the filter screen and ensuring the efficiency of the device in discharging the filtrate.

[0019] 3. The present invention sets a scraper assembly at the outer top of the rotating drum. When the lower spiral and the upper spiral are conveying tea liquid, the filtrate and impurities in the tea liquid are separated under the action of centrifugal force. After separation, the impurities are conveyed to the outer top of the rotating drum by the upper spiral and then scooped up by the scraper. At this time, the scraper continues to drive the impurities to rotate, so that the impurities are thrown outward under the action of centrifugal force, and then the impurities are discharged in time and quickly, so as to facilitate the continuous treatment of the tea liquid by the device.

[0020] 4. The present invention sets a scraping assembly at the outer top end of the rotating drum. When the height of the scraper needs to be adjusted, the rotation speed of the driving motor is first reduced to less than a first preset value, and then the electromagnetic driving part is energized. After overcoming the elastic force of the reset elastic part at the lower part of the elastic deformation part, the elastic deformation part is pushed to slide downward. The downward sliding of the elastic deformation part will drive the scraper to move downward, thereby adjusting the height of the scraper and discharging the slag in time; thereby avoiding the failure to discharge the slag in time due to wear on the bottom of the scraper.

[0021] 5. The present invention sets a scraper assembly at the top outer side of the drum. When the filter needs to be cleaned, the rotation speed of the driving motor is first increased to be greater than a first preset value, and then the electromagnetic driving part is energized to enable the limiting sliding column to slide smoothly toward the outer shell. The sliding of the elastic deformation part will drive the scraper to slide toward the outer shell, so that the scraper contacts the protrusion of the inner wall of the filter, so that the scraper collides with the filter during the rotation, causing the filter to vibrate, thereby preventing the filter from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention.

[0024] Figure 3 It is a schematic cross-sectional view of the overall structure of the present invention.

[0025] Figure 4 It is an exploded view of the overall structure of the present invention.

[0026] Figure 5 It is a schematic diagram of the rotary drum structure of the present invention.

[0027] Figure 6 It is a schematic cross-sectional view of the drum structure of the present invention.

[0028] Figure 7 It is a schematic diagram of the drum shell structure of the present invention.

[0029] Figure 8 It is a schematic diagram of the outer shell structure of the present invention.

[0030] Fig. 9 It is a schematic diagram of the filter screen pressing ring structure of the present invention.

[0031] Fig.10 It is a schematic diagram of the connection between the scraping assembly and the drum structure of the present invention.

[0032] Fig.11 It is a schematic diagram of the structure of the scraper assembly of the present invention.

[0033] Fig.12 It is a schematic structural diagram of the scraper assembly of the present invention from another angle.

[0034] Fig.13 It is a schematic diagram of the structure of the elastic deformation member of the present invention.

[0035] Fig.14 It is a top view of the "U"-shaped fixing block of the present invention.

[0036] Fig.15 For the present invention Fig.14 Aa section view.

[0037] Fig.16 It is a schematic diagram of the limit block structure of the present invention.

[0038] In the figure: 1, outer shell; 2, drum shell; 21, filter screen installation groove; 22, filter groove; 3, drum; 31, lower spiral; 32, upper spiral; 33, liquid outlet; 34, pressure relief reflux outlet; 35, guide block; 36, diverter block; 37, feed cover; 371, guide groove; 372, guide pipe; 4, filter screen; 41, filter hole; 5, slag discharge cover; 6, slag discharge port; 7, slag scraping assembly; 701, "U"-shaped fixing block; 702, receiving groove; 703, vertical guide groove; 704 , inclined guide groove; 705, horizontal slide groove; 706, limit block; 707, elastic deformation member; 7071, fixing part; 7072, elastic deformation part; 7073, sliding sleeve; 708, scraper; 709, reset elastic part; 710, limit sliding column; 711, magnet; 712, guide block; 8, electromagnetic drive part; 9, reset assembly; 10, filter screen pressure ring; 11, slag discharge pipe; 12, liquid discharge pipe; 13, liquid inlet pipe; 14, support screw; 15, connecting ear; 16, base. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Embodiment 1 like Figures 1 to 9 As shown in the figure, the impurity filtering device for extracting black tea provided by the present invention is essentially a device for separating filtrate and impurities in tea liquid by centrifugal force. By setting a drum shell 2 and a drum 3, the drum 3 can rotate in the drum shell 2, and the outer side of the drum 3 is provided with a lower spiral 31 and an upper spiral 32. The tea liquid to be filtered can be transported to the inside of the drum 3 and rotate with the rotating drum 3, and then enter between the drum shell 2 and the drum 3 through the liquid outlet 33 under the action of centrifugal force. At this time, the lower spiral 31 and the upper spiral 32 are arranged on the outer side of the drum 3. 31 and the upper spiral 32 can realize the transportation of tea liquid from bottom to top. During the transportation process of tea liquid, the filtrate and impurities are separated due to different centrifugal forces. The filtrate close to the inner wall of the drum shell 2 passes through the filter screen 4 and enters between the outer shell 1 and the drum shell 2, while the impurities close to the drum 3 are transported to the top of the drum 3 under the action of the upper spiral 32. After a certain amount of impurities are accumulated on the top, they will enter the slag discharge cover 5 under the joint action of centrifugal force and the upper spiral 32 to separate the filtrate from the impurities in the tea liquid.

[0041] In terms of specific structural installation, the structural body can be constructed according to the inventive concept of this embodiment, and no special limitation is made in this embodiment.

[0042] In this embodiment, the impurity filtering device for extracting black tea includes an outer shell 1. Specifically, the outer shell 1 is configured as an hourglass-shaped structure and has an inner cavity.

[0043] The drum shell 2 is also included, which is set to an hourglass structure and is arranged inside the outer shell 1. The top of the inner wall is provided with a filter installation groove 21 and a filter groove 22 for discharging filtrate. Specifically, the inner wall of the filter installation groove 21 is provided with a plurality of filter grooves 22 for discharging filtrate, and the filter grooves 22 are set to a strip structure.

[0044] The drum 3 driven by the driving motor is set to an hourglass structure and is rotatably arranged inside the drum shell 2. The bottom of its outer wall is provided with a lower spiral 31, the top of its outer wall is provided with an upper spiral 32, the bottom end of its outer wall is provided with a liquid outlet 33, and the top end is provided with a decompression reflux port 34; the decompression reflux port 34 is used to disperse the pressure on the filter screen 4. Specifically, the lower spiral 31 and the upper spiral 32 are both in contact with the inner wall of the drum shell 2.

[0045] The present invention provides a lower spiral 31 and an upper spiral 32, and the tea liquid is transported upward under the action of the lower spiral 31 and the upper spiral 32. During this process, the filtrate and impurities in the tea liquid are separated into layers under the action of centrifugation.

[0046] The filter screen 4 is configured as a funnel-shaped structure and is located inside the filter screen installation groove 21, and a plurality of protrusions are arranged in a circular array on its inner wall; specifically, a plurality of filter holes 41 are arranged around the outer side of the filter screen 4, and the filter holes 41 are used to discharge the filtrate.

[0047] The slag discharge cover 5 and the slag discharge port 6 are both disposed on the inner wall of the outer shell 1 . Specifically, the cross section of the slag discharge cover 5 is an inclined structure, which is convenient for guiding the slag to the slag discharge port 6 .

[0048] The base 16 is located at the bottom end of the outer shell 1, and the driving motor is placed in the middle of the lower surface of the base 16, and the output shaft of the driving motor is connected to the bottom end of the drum 3. The present invention sets a driving motor and controls the driving motor to work, and the driving motor drives the drum 3 to rotate, thereby filtering.

[0049] The guide block 35 is set as an annular structure and is located at the inner upper end of the drum 3, and the cross-section of the guide block 35 is set as a triangular structure. The guide block 35 is located below the reduced pressure reflux port 34; by setting the guide block 35, the present invention guides the liquid refluxed from the reduced pressure reflux port 34 to the bottom of the drum 3.

[0050] The diverter block 36 is configured as a conical structure and is located at the inner bottom end of the drum 3 . The diverter block 36 is used to disperse the fluid entering the drum 3 and disperse the fluid through the liquid outlet 33 .

[0051] The feed cover 37 is configured as a funnel-shaped structure and is located at the inner top end of the drum 3 .

[0052] The guide groove 371 is configured as a strip structure and is located on the inner wall of the feed cover 37 . A plurality of guide grooves 371 are provided.

[0053] The flow guide pipe 372 is located at the bottom end of the feed cover 37 and extends to the inner middle part of the drum 3. The present invention guides the liquid to be filtered into the top of the feed cover 37 by setting the flow guide pipe 372, thereby achieving liquid inlet.

[0054] The filter screen pressing ring 10 is set as an annular structure and is located at the top of the outer shell 1, and the lower surface of the filter screen pressing ring 10 is in contact with the top of the drum shell 2 and the filter screen 4, and a channel for the filter residue to pass through is opened on the side wall of the filter screen pressing ring 10. The filter screen pressing ring 10 is provided to limit the filter screen 4 from sliding in the filter screen installation groove 21.

[0055] A slag discharge pipe 11 connected to the slag discharge port 6 is disposed on the peripheral side wall of the outer shell 1 , and the filtered slag in the slag discharge cover 5 is discharged through the slag discharge pipe 11 .

[0056] A drain pipe 12 is provided through the bottom end of the outer shell 1 , and the filtrate filtered by the filter screen 4 is discharged through the drain pipe 12 .

[0057] The liquid inlet pipe 13 is located at the middle of the top end of the slag discharge cover 5 and extends to the inside of the feed cover 37 .

[0058] The support screw 14 is located above the base 16 .

[0059] The connecting ear 15 is located outside the outer shell 1 and the filter pressing ring 10. The support screw 14 and the connecting ear 15 are used to limit the position of the outer shell 1 and the filter pressing ring 10. By removing the nut on the support screw 14, the device can be disassembled for cleaning and maintenance of the device.

[0060] When the impurity filtering device for extracting black tea of ​​the present embodiment is used, tea liquid is injected into the device through the liquid inlet pipe 13, and the tea liquid passes through the liquid inlet pipe 13 and enters the feed cover 37. At this time, the drum 3 rotates under the action of the driving motor, and the drum 3 drives the feed cover 37 to rotate. The feed cover 37 drives the tea liquid to rotate through the guide groove 371, so that the tea liquid rotates and enters the inside of the drum 3. The tea liquid continues to rotate with the drum 3, and passes through the liquid outlet 33 to enter between the drum 3 and the drum shell 2, and then is transported upward under the action of the lower spiral 31 and the upper spiral 32. During this process, the filtrate and impurities in the tea liquid are separated into layers under the action of centrifugation, and the filtrate moves along the inner wall of the drum shell 2. When the filtrate and impurities move to the upper end of the drum shell 2, the filtrate passes through the filter screen 4 under the action of centrifugal force and enters between the outer shell 1 and the drum shell 2, and then falls freely and passes through the discharge pipe 12 for discharge, while the impurities are blocked by the filter screen 4 and continue to move upward with the upper spiral 32, and then the impurities are pushed into the top of the slag discharge cover 5 and thrown out under the action of centrifugal force. At this time, the tea liquid can be filtered.

[0061] Embodiment 2 In actual use, since the slag is discharged into the slag discharge cover 5 by the combined action of centrifugal force and the upper spiral 32, it needs to accumulate to a certain extent on the top before it can be cleaned into the slag discharge cover 5, which results in the slag material not being discharged in time, and when the filtering work stops, it is easy to cause the slag material to mix with the liquid again, and the filter screen 4 is easy to be blocked during the filtering process. Therefore, this embodiment is further improved on the basis of the above-mentioned embodiment 1.

[0062] like Figures 10 to 16 As shown, a plurality of scraper assemblies 7 are arranged in a circular array at the outer top end of the rotating drum 3 .

[0063] The electromagnetic drive unit 8 is disposed on the top of the outer shell 1 and can cooperate with the scraper assembly 7 to adjust the position of the scraper assembly 7. Specifically, the electromagnetic drive unit 8 is an electromagnet, which is disposed on the top of the outer shell 1 and located on the lower surface of the filter screen pressing ring 10.

[0064] The scraper assembly 7 includes a "U"-shaped fixed block 701, which is placed on the side wall of the rotating drum 3 and has a guide column on its top. Two receiving grooves 702 are symmetrically opened on its top. The side walls of the receiving grooves 702 are opened with vertical guide grooves 703, inclined guide grooves 704 and horizontal slide grooves 705. The inner wall of the horizontal slide groove 705 is connected to the limiting block 706 through an elastic reset member.

[0065] Specifically, the top of the limiting block 706 is an inclined surface, and the inclined surface is flush with the bottom wall of the inclined guide groove 704 .

[0066] Specifically, the vertical guide groove 703 is opened at one end of the accommodating groove 702 close to the side wall of the rotating drum 3, the oblique guide groove 704 is opened at the middle side wall of the vertical guide groove 703, and the horizontal slide groove 705 is opened at the middle side wall of the vertical guide groove 703.

[0067] The elastic deformation member 707 is slidably sleeved on the guide column, and a scraper 708 and a plurality of resetting elastic parts 709 are provided at the bottom thereof; the scraper 708 is placed between the two side walls of the “U”-shaped fixed block 701 .

[0068] Specifically, the elastic deformation member 707 includes a fixing portion 7071 , and elastic deformation portions 7072 are provided at both ends of the fixing portion 7071 . The two elastic deformation portions 7072 are connected by a sliding sleeve 7073 .

[0069] Two limiting sliding columns 710 have one end slidingly placed in the receiving groove 702 and the other end slidingly passing through the elastic deformation member 707 . A magnet 711 is provided on the top of the two limiting sliding columns 710 , and a guide block 712 cooperating with the vertical guide groove 703 is provided on the peripheral side wall of the two limiting sliding columns 710 .

[0070] A reset assembly 9 is provided at the bottom of the receiving groove 702 .

[0071] Specifically, the reset assembly 9 includes a reset plate, and the reset plate is connected to the inner bottom wall of the accommodating groove 702 through an elastic reset member.

[0072] In actual operation, during the filtering process of the filtering device, the impurities are transported to the outer top of the drum 3 by the upper spiral 32 after separation. Due to the setting of the scraper assembly 7, the impurities are scooped up by the scraper 708 under the action of the scraper 708. At this time, the scraper 708 continues to drive the impurities to rotate, so that the impurities are thrown outward under the action of centrifugal force, thereby realizing the timely discharge of impurities, thereby solving the problem of not having to wait for the impurities to accumulate to a certain level before the slag can be discharged.

[0073] Since the scraper 708 is used to lift up impurities, it is easy to cause the bottom of the scraper 708 to wear. After the scraper 708 is worn, it is necessary to adjust the height of the scraper 708 so that the impurities can continue to be discharged in time.

[0074] When the height of the scraper 708 needs to be adjusted, first, the speed of the driving motor is reduced to less than a first preset value, and the first preset value is such that the limit block 706 can slide into the bottom position of the guide block 712; then, the electromagnetic drive unit 8 is energized to generate a magnetic repulsion force between the electromagnetic drive unit 8 and the magnet 711. Under the action of the magnetic repulsion force, the limit sliding column 710 will be pushed to slide downward. The limit sliding column 710 will slide downward after overcoming the elastic force of the reset component 9. The downward sliding of the limit sliding column 710 will cause the magnet 711 to collide with the elastic deformable part 707, and after overcoming the elastic force of the reset elastic part 709 at the lower part of the elastic deformable part 707, it will push the elastic deformable part 707 to slide downward. The downward sliding of the elastic deformable part 707 will drive the scraper 708 to move downward, thereby adjusting the height of the scraper 708, and then being able to discharge the slag in time; thereby avoiding the situation where the slag cannot be discharged in time due to wear at the bottom of the scraper 708.

[0075] When the filter screen 4 needs to be cleaned, firstly, the speed of the driving motor is increased to be greater than a first preset value, and the first preset value is such that the limit block 706 can slide into the bottom position of the guide block 712; then, the electromagnetic driving part 8 is energized to generate a magnetic repulsion force between the electromagnetic driving part 8 and the magnet 711, and under the action of the magnetic repulsion force, the limit sliding post 710 is pushed downward to a position where the guide block 712 and the limit block 706 are in contact, and then, under the inclined guiding action of the limit block 706, the guide block 712 is drawn into the inclined guide groove 712. 04, under the guidance of the inclined guide groove 704, the elastic deformation member 707 will be pulled to move toward the inner wall of the outer shell 1, so that the elastic deformation part 7072 is bent and deformed, so that the limiting sliding column 710 can slide smoothly toward the outer shell 1, and the sliding of the elastic deformation member 707 will drive the scraper 708 to slide toward the outer shell 1, so that the scraper 708 and the protrusion of the inner wall of the filter screen 4 are in conflict, so that the scraper 708 collides with the filter screen 4 during the rotation process, causing the filter screen 4 to vibrate, thereby preventing the filter screen 4 from being blocked.

[0076] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An impurity filtering device for extracting dark tea, comprising an outer shell (1), characterized in that: Also includes: The drum shell (2) is configured as an hourglass-shaped structure and is arranged inside the outer shell (1), and the top of the inner side wall thereof is provided with a filter installation groove (21) and a filter groove (22) for discharging filtrate; A rotating drum (3) driven by a driving motor, which is configured as an hourglass-shaped structure and is rotatably disposed inside the rotating drum shell (2), wherein a lower spiral (31) is disposed at the bottom of the outer wall thereof, an upper spiral (32) is disposed at the top of the outer wall thereof, a liquid outlet (33) is disposed at the bottom end of the outer wall thereof, and a decompression reflux outlet (34) is disposed at the top end thereof; The filter screen (4) is configured as a funnel-shaped structure and is located inside the filter screen installation groove (21), and a plurality of protrusions are arranged in a circumferential array on the inner wall thereof; A slag discharge cover (5) and a slag discharge port (6), both of which are disposed on the inner wall of the outer shell (1); A plurality of scraper assemblies (7) are arranged in a circular array at the outer top end of the rotating drum (3). An electromagnetic drive unit (8) disposed on the top of the outer shell (1); The scraper assembly (7) comprises a "U"-shaped fixed block (701) which is placed on the side wall of the rotating drum (3), a guide column is provided on the top of the fixed block, two receiving grooves (702) are symmetrically provided on the top of the fixed block, a vertical guide groove (703), an inclined guide groove (704) and a horizontal slide groove (705) are provided on the side wall of the receiving groove (702), and the inner wall of the horizontal slide groove (705) is connected to a limit block (706) via an elastic reset member; An elastic deformation member (707) is slidably sleeved on the guide column, and a scraper (708) and a plurality of resetting elastic parts (709) are provided at the bottom thereof; the scraper (708) is placed between the two side walls of the "U"-shaped fixed block (701); Two limiting sliding columns (710), one end of which is slidably placed in the receiving groove (702) and the other end of which slides through the elastic deformation member (707), a magnet (711) is provided on the top of the column, and a guide block (712) is provided on the peripheral side wall thereof to cooperate with the vertical guide groove (703); A reset assembly (9) is provided at the bottom of the containing groove (702).

2. The impurity filtering device for extracting dark tea according to claim 1, characterized in that: Also includes: The top of the limit block (706) is an inclined surface, and the inclined surface is flush with the bottom wall of the inclined guide groove (704); The vertical guide groove (703) is formed at one end of the accommodating groove (702) close to the side wall of the rotating drum (3), the inclined guide groove (704) is formed at the middle side wall of the vertical guide groove (703), and the horizontal slide groove (705) is formed at the middle side wall of the vertical guide groove (703).

3. The impurity filtering device for extracting dark tea according to claim 1, characterized in that: Also includes: The reset assembly (9) comprises a reset plate, and the reset plate is connected to the inner bottom wall of the accommodating groove (702) via an elastic reset member.

4. The impurity filtering device for extracting dark tea according to claim 1, characterized in that: Also includes: The base (16) is located at the bottom end of the outer shell (1), the drive motor is placed in the middle of the lower surface of the base (16), and the output shaft of the drive motor is connected to the bottom end of the rotating drum (3).

5. The impurity filtering device for extracting dark tea according to claim 1, characterized in that: Also includes: A guide block (35) is provided in an annular structure and is located at the inner upper end of the drum (3); the cross section of the guide block (35) is provided in a triangular structure; the guide block (35) is located below the pressure reducing reflux port (34); The flow dividing block (36) is configured as a conical structure and is located at the inner bottom end of the rotating drum (3). The flow dividing block (36) is used to disperse the fluid entering the rotating drum (3) and disperse it through the liquid outlet (33).

6. The impurity filtering device for extracting dark tea according to claim 1, characterized in that: Also includes: A feed cover (37) which is configured as a funnel-shaped structure and is located at the inner top end of the drum (3); A guide groove (371) is provided in a strip-shaped structure and is located on the inner side wall of the feed cover (37), and a plurality of guide grooves (371) are provided; The flow guide pipe (372) is located at the bottom end of the feed cover (37) and extends to the inner middle part of the drum (3).

7. The impurity filtering device for extracting dark tea according to claim 1, characterized in that: Also includes: The filter pressing ring (10) is provided in an annular structure and is located at the top of the outer shell (1), and the lower surface of the filter pressing ring (10) is in contact with the top of the drum shell (2) and the filter screen (4), and the side wall of the filter pressing ring (10) is provided with a channel for filter residue to pass through.

8. The impurity filtering device for extracting dark tea according to claim 4, characterized in that: Also includes: A slag discharge pipe (11) connected to the slag discharge port (6) is provided on the peripheral side wall of the outer shell (1), and the filtered slag in the slag discharge cover (5) is discharged through the slag discharge pipe (11); A drainage pipe (12) is provided through the bottom end of the outer shell (1), and the filtrate filtered by the filter screen (4) is discharged through the drainage pipe (12).

9. The impurity filtering device for extracting dark tea according to claim 5, characterized in that: Also includes: A liquid inlet pipe (13) is located at the middle of the top end of the slag discharge cover (5) and extends to the interior of the material feed cover (37).

10. The impurity filtering device for extracting dark tea according to claim 9, characterized in that: Also includes: A support screw (14) located above the base (16); The connecting ear (15) is located outside the outer shell (1) and the filter pressing ring (10), and the supporting screw (14) and the connecting ear (15) are used to limit the position of the outer shell (1) and the filter pressing ring (10).

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