Filtering tank and sample separating and extracting instrument

Abstract

The utility model provides a filtering tank and a sample separation and extraction instrument. The filtering tank comprises a filtering tank body, a filtering net, a scraping plate assembly and a driving mechanism, and the filtering net is arranged in the filtering tank body and is used for filtering a sample suspension. The scraper assembly and the filter screen are oppositely arranged, the scraper assembly comprises a scraper piece and a connecting piece which are connected with each other, the scraper piece is located in the filter tank body, one end of the connecting piece is located in the filter tank body and connected with the scraper piece, and the other end of the connecting piece penetrates through and extends out of the filter tank body. The driving mechanism is connected with the part, extending out of the filtering tank body, of the connecting piece, and is used for driving the connecting piece to move so as to drive the scraping plate piece to linearly reciprocate along the direction parallel to the surface of the filtering net, so that the scraping plate piece scrapes the sample suspension on the filtering net.

Description

Technical Field

[0001] This application relates to the technical field of separation and extraction, and particularly relates to a filter tank and a sample separation and extraction instrument. Background Art

[0002] The filtering device of the separation and extraction equipment usually scrapes the samples on the filter screen to reduce blockage. At present, the scraping method adopted is to drive the stirring rod of the filtering device to rotate, and drive the scraping blade on the stirring rod to rotate. When the scraping blade rotates, it will scrape the samples on the filter screen. However, during the rotation of the stirring rod, vortices may be formed near the stirring rod, and impurities will accumulate at the vortices and block the filter screen, resulting in a reduction in filtration efficiency. Summary of the Utility Model

[0003] To solve the above technical problems, this application provides a filter tank and a sample separation and extraction instrument, which can reduce blockage and improve filtration efficiency.

[0004] In the first aspect of this application, a filter tank is provided. The filter tank includes a filter tank body, a filter screen, a scraper assembly and a driving mechanism. The filter screen is arranged in the filter tank body and is used for filtering the sample suspension. The scraper assembly is arranged opposite to the filter screen. The scraper assembly includes a scraper piece and a connecting piece connected to each other. The scraper piece is located in the filter tank body. One end of the connecting piece is located in the filter tank body and is connected to the scraper piece, and the other end penetrates and extends out of the filter tank body. The driving mechanism is connected to the part of the connecting piece extending out of the filter tank body and is used for driving the connecting piece to move, so as to drive the scraper piece to perform a linear reciprocating motion along a direction parallel to the surface of the filter screen, so that the scraper piece scrapes the sample suspension on the filter screen.

[0005] In the second aspect of this application, a sample separation and extraction instrument is provided, which includes the filter tank described in the first aspect.

[0006] The filter tank and the sample separation and extraction instrument provided by this application can break up the impurities in the sample suspension on the filter screen and scrape them to the surrounding by driving the scraper piece to perform a linear reciprocating motion on the filter screen, so that the impurities are evenly distributed on the filter screen, thereby reducing the blockage of the filter screen and improving the filtration efficiency. Compared with the related art, the scraper assembly in this application performs a linear reciprocating motion and will not generate vortices, avoiding the situation where impurities accumulate at the vortices, thereby reducing blockage and having higher filtration efficiency. Description of the Drawings

[0007] To more clearly illustrate the technical solution of the present application, the accompanying drawings required for the implementation will be briefly introduced below. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0008] Figure 1 It is a schematic structural diagram of a filter tank provided in an embodiment of the present application.

[0009] Figure 2 It is a schematic structural diagram of a filter tank body provided in an embodiment of the present application.

[0010] Figure 3 It is a schematic diagram of a state when the connecting piece performs a linear reciprocating motion.

[0011] Figure 4 It is a schematic exploded view of a filter tank provided in an embodiment of the present application.

[0012] Figure 5 It is a schematic structural diagram of a second mounting plate provided in an embodiment of the present application.

[0013] Figure 6 It is a schematic structural diagram of a fixing member provided in an embodiment of the present application.

[0014] Figure 7 It is a schematic simplified structural diagram of a crank-slider mechanism and a connecting piece provided in an embodiment of the present application.

[0015] Figure 8 It is a schematic simplified structural diagram of a cam mechanism and a connecting piece provided in an embodiment of the present application.

[0016] Figure 9 It is a schematic simplified structural diagram of a detent mechanism and a connecting piece provided in an embodiment of the present application.

[0017] Figure 10 It is Figure 9 A schematic diagram of the detent mechanism and the connecting piece at time T1 when the crank rotates clockwise in

[0018] Figure 11 It is Figure 9 A schematic diagram of the detent mechanism and the connecting piece at time T2 when the crank rotates clockwise in

[0019] Figure 12 It is Figure 9 A schematic diagram of the detent mechanism and the connecting piece at time T3 when the crank rotates clockwise in

[0020] Figure 13 It is a schematic simplified structural diagram of a cylinder-slider mechanism and a connecting piece provided in an embodiment of the present application.

[0021] Figure 14 This is a schematic structural diagram of the scraper assembly provided by the embodiment of the present application.

[0022] Figure 15 This is a schematic explosion structure of the filter tank body and a schematic structural diagram of the scraper assembly provided by the embodiment of the present application.

[0023] Figure 16 This is a schematic diagram of the scraper assembly located within the frame provided by the embodiment of the present application.

[0024] Explanation of reference numerals:

[0025] 100 - Filter tank; 1 - Filter tank body; 3 - Scraper assembly; 31 - Scraper member; 32 - Connecting member; 4 - Driving mechanism; 11 - First through - hole; 41 - Driving member; 42 - Transmission assembly; 411 - Motor; 421 - Lead screw; 422 - Nut; 5 - First mounting plate; 51 - Second through - hole; 43 - Second mounting plate; 44 - Fixing member; 431 - First mounting hole; 441 - Fixing member main body; 432 - Second mounting hole; 442 - Third mounting hole; 443 - Clamping portion; 4431 - Connecting portion; 4432 - Extension portion; 4433 - Clamping groove; 433 - First avoidance groove; 444 - Second avoidance groove; 423 - Crank; 423a - First end; 423b - Second end; 424 - Connecting rod; 425 - Cam; 426 - Elastic member; 4251 - Outer peripheral wall; 4251a - Driving section; 4251b - Non - driving section; 4252 - Eccentric position; 427 - Pushing member; 428 - Slide bar; 428a - Chute; 428b - First slide bar portion; 428c - Second slide bar portion; 412 - Cylinder block; 413 - Piston; 412a - Chamber; 429 - Piston rod; 33 - Frame body; 34 - Guide member; 52 - Fourth mounting hole; 12 - Frame; 121 - Filter chamber. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0027] In the description of this application, the terms "first", "second", "third", "fourth", etc. are used to distinguish different objects, rather than to describe a specific order. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", etc. is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0028] In the description of this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two components; it can be a communication connection; it can be an electrical connection. For those of ordinary skill in the art, the specific meaning of the above terms in this application can be understood according to specific circumstances.

[0029] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the filter tank 100 provided by an embodiment of this application. As Figure 1 shown, the filter tank 100 includes a filter tank body 1, a filter net (not shown in the figure), a scraper assembly 3 and a driving mechanism 4. The filter net is arranged inside the filter tank body 1 and is used for filtering the sample suspension. The scraper assembly 3 is arranged opposite to the filter net. The scraper assembly 3 includes a scraper piece 31 and a connecting piece 32 which are connected to each other. The scraper piece 31 is located inside the filter tank body 1. One end of the connecting piece 32 is located inside the filter tank body 1 and is connected to the scraper piece 31, and the other end penetrates and extends out of the filter tank body 1. The driving mechanism 4 is connected to the part of the connecting piece 32 that extends out of the filter tank body 1 and is used to drive the connecting piece 32 to move, so as to drive the scraper piece 31 to perform a linear reciprocating motion along the direction parallel to the surface of the filter net, so that the scraper piece 31 scrapes the sample suspension on the filter net.

[0030] The filter tank 100 provided by the embodiment of this application can break up the impurities in the sample suspension on the filter net and scrape them to the surroundings by driving the scraper piece 31 to perform a linear reciprocating motion on the filter net, so that the impurities are evenly distributed on the filter net, thereby reducing the blockage of the filter net and improving the filtering efficiency. Compared with the related art, the scraper assembly 3 in the embodiment of this application performs a linear reciprocating motion and does not generate vortices, avoiding the situation where impurities accumulate at the vortices, thereby reducing blockage and having a higher filtering efficiency.

[0031] The filter tank 100 can be used to filter any kind of sample suspension, and the sample suspension can be but not limited to fecal suspension.

[0032] Please refer to Figure 2 , which is a schematic structural diagram of the filter tank body 1 provided by the embodiment of the present application. In some embodiments, as Figure 2 shown, a first through hole 11 may be provided on the side wall of the filter tank body 1, and the first through hole 11 may penetrate through the side wall of the filter tank body 1 along a direction parallel to the surface of the filter net. The connecting member 32 passes through the side wall of the filter tank body 1 from the first through hole 11 and extends out of the filter tank body 1. The connecting member 32 is movably connected to the first through hole 11, and the connecting member 32 is movable relative to the first through hole 11 to facilitate the driving mechanism 4 to drive the connecting member 32 to move.

[0033] In some embodiments, the driving mechanism 4 is any one of a screw drive mechanism, a cylinder slider mechanism, a cam mechanism, a crank slider mechanism, and a non-rotating yoke mechanism. In the related art, the power mechanism of the filtering device drives the stirring rod to rotate through a gear, and then drives the scraping blade to rotate. However, the gear is prone to wear, resulting in the inability of the stirring rod and the scraping blade to rotate continuously, and further resulting in the failure of the scraping action of the scraping blade. In the embodiment of the present application, by setting the driving mechanism 4 as any one of a screw drive mechanism, a cylinder slider mechanism, a cam mechanism, a crank slider mechanism, and a non-rotating yoke mechanism, the transmission through the gear can be avoided, thereby avoiding the problem that the scraping member cannot be driven due to gear wear and tooth slipping, and further avoiding the blockage of the filter net and improving the filtering efficiency.

[0034] In some embodiments, as Figure 1 shown, the driving mechanism 4 includes a driving member 41 and a transmission assembly 42. The transmission assembly 42 is connected to the part of the connecting member 32 extending out of the filter tank body 1. The transmission assembly 42 is used to convert the rotational motion or linear reciprocating motion of the driving member 41 into the linear reciprocating motion of the connecting member 32 and the scraping member 31 along a direction parallel to the filter net. By setting the transmission assembly 42 to be connected to the driving member 41 and the transmission assembly 42, the motion of the driving member 41 can be efficiently converted into the linear reciprocating motion of the connecting member 32 and the scraping member 31.

[0035] In some embodiments, as Figure 1 shown, the driving mechanism 4 is a screw drive mechanism. The driving member 41 includes a motor 411. The transmission assembly 42 includes a screw rod 421 and a nut 422. The screw rod 421 is fixedly connected to the output shaft of the motor 411. The nut 422 is sleeved on the screw rod 421. The nut 422 is fixedly connected to the part of the connecting member 32 extending out of the filter tank body 1. The axial direction of the screw rod 421 is parallel to the surface of the filter net. The scraping member 31 and the connecting member 32 are fixedly connected.

[0036] When the output shaft of the motor 411 rotates alternately in the forward direction and the reverse direction, the screw rod 421 rotates following the output shaft of the motor 411, and the nut 422 performs linear reciprocating motion along the axial direction of the screw rod 421, thereby driving the connecting member 32 and the scraper member 31 to perform linear reciprocating motion in a direction parallel to the surface of the filter screen.

[0037] Specifically, when the output shaft of the motor 411 rotates forward, the screw rod 421 rotates forward along with the output shaft, and the nut 422 performs linear motion along a first direction, thereby driving the connecting member 32 and the scraper member 31 to perform linear motion along the first direction, wherein the first direction is parallel to the axial direction of the screw rod 421 and the surface of the filter screen; when the output shaft of the motor 411 rotates reversely, the screw rod 421 rotates reversely along with the output shaft, and the nut 422 performs linear motion along a second direction, thereby driving the connecting member 32 and the scraper member 31 to perform linear motion along the second direction, wherein the second direction is opposite to the first direction. The first direction may be as follows: Figure 1 As shown in the direction A, the second direction can be Figure 1 Alternatively, the first direction may be as shown in FIG. Figure 1 As shown in the B direction, the second direction can be Figure 1 Shown in direction A.

[0038] See also Figure 3 , is a schematic diagram of a state when the connecting member 32 performs linear reciprocating motion. When the screw transmission mechanism drives the nut 422 to move away from the filter tank body 1 along the axial direction, the connecting member 32 moves away from the filter tank body 1 along the axial direction of the nut 422 .

[0039] In some embodiments, the filter tank 100 may include a shell (not shown), the filter tank body 1 is accommodated in the shell, and the motor 411 may be installed on the shell to support the motor 411.

[0040] See also Figure 1 and Figure 4 , Figure 4 Schematic diagram of the decomposition structure of the filter tank 100 provided in the embodiment of the present application. In some embodiments, such as Figure 1 and Figure 4 As shown, the filter tank 100 also includes a first mounting plate 5, which is installed and fixed on the outer wall of the filter tank body 1, and the connecting member 32 passes through the filter tank body 1 and the first mounting plate 5 in sequence, and passes through the side of the first mounting plate 5 away from the filter tank body 1, and the part of the connecting member 32 passing through the first mounting plate 5 is connected to the driving mechanism 4.

[0041] likeFigure 4 As shown, the first mounting plate 5 may be provided with a second through hole 51, and the second through hole 51 may penetrate the first mounting plate 5 in a direction parallel to the surface of the filter screen. The connecting member 32 passes through the first mounting plate 5 from the second through hole 51 and extends out of the side of the first mounting plate 5 away from the filter tank body 1, and the connecting member 32 is movably connected to the second through hole 51, and the connecting member 32 is movable relative to the second through hole 51.

[0042] By arranging the first mounting plate 5 on the outer wall of the filter tank body 1, the connecting member 32 is supported not only by the outer wall of the filter tank body 1, but also by the first mounting plate 5. By providing the connecting member 32 with a plurality of supporting points along the extending direction of the connecting member 32, the movement stability of the connecting member 32 along the extending direction can be improved.

[0043] See also Figure 1 , Figure 4 and Figure 5 , Figure 5 Schematic diagram of the structure of the second mounting plate 43 provided in the embodiment of the present application. In some embodiments, as Figure 1 , Figure 4 and Figure 5 As shown, the driving mechanism 4 further includes a second mounting plate 43 connected to the transmission assembly 42, the second mounting plate 43 is located on the side of the first mounting plate 5 away from the filter tank body 1, the surface of the second mounting plate 43 is parallel to the surface of the first mounting plate 5, and the portion of the connecting member 32 passing through the first mounting plate 5 is fixedly connected to the second mounting plate 43. The transmission assembly 42 is used to convert the rotational motion or linear reciprocating motion of the driving member 41 into a linear reciprocating motion of the second mounting plate 43 in a direction parallel to the surface of the filter screen, that is, to convert it into a linear reciprocating motion of the connecting member 32 and the scraper member 31 in a direction parallel to the surface of the filter screen.

[0044] In some embodiments, Figure 5As shown, at least one first mounting hole 431 is formed in the second mounting plate 43. The connecting member 32 sequentially passes through the filter tank body 1, the first mounting plate 5, and the first mounting hole 431 of the second mounting plate 43, and the connecting member 32 passes out of the first mounting hole 431. An external thread is provided on the portion of the connecting member 32 close to the second mounting plate 43, and a fastening nut can be used to threadedly connect with the portion of the connecting member 32 passing out of the first mounting hole 431, so as to lock the connecting member 32 and the second mounting plate 43, thereby fixedly connecting the connecting member 32 and the second mounting plate 43. In other embodiments, the connecting member 32 can also be fixedly connected to the second mounting plate 43 through other connection methods, for example, the portion of the connecting member 32 close to the second mounting plate 43 is connected to the second mounting plate 43 through connection methods such as riveting, clamping, and bonding.

[0045] By setting the surface of the second mounting plate 43 to be parallel to the surface of the first mounting plate 5, when the second mounting plate 43 moves in the direction close to the first mounting plate 5, the second mounting plate 43 can be attached to the first mounting plate 5. Under the same linear motion stroke, such a setting can reduce the space volume occupied by the driving mechanism 4 and the first mounting plate 5.

[0046] When the driving mechanism 4 is a lead screw transmission mechanism, the second mounting plate 43 is fixedly connected to the nut 422. When the nut 422 makes a linear reciprocating motion, it drives the second mounting plate 43 to make a linear reciprocating motion, thereby driving the connecting member 32 and the scraping member 31 to make a linear reciprocating motion.

[0047] Please refer to Figure 1 、 Figure 4 and Figure 6 , Figure 6 which is a schematic structural diagram of the fixing member 44 provided by the embodiment of the present application. In some embodiments, as shown in Figure 1 、 Figure 4 and Figure 6 ,the driving mechanism 4 may further include a fixing member 44. The fixing member 44 is fixedly connected to the nut 422 and the second mounting plate 43, so that the second mounting plate 43 is fixedly connected to the nut 422.

[0048] In some embodiments, as shown in Figure 4 and Figure 6 ,the fixing member 44 may include a fixing member main body 441. The fixing member main body 441 is fixedly connected to the second mounting plate 43.

[0049] In some embodiments, as shown in Figure 4 and Figure 5 ,the second mounting plate 43 may be provided with a second mounting hole 432, such asFigure 4 and Figure 6 As shown in Figure 6 , the fixing member body 441 may be provided with a third mounting hole 442. By passing a bolt through the second mounting hole 432 and the third mounting hole 442 and connecting the bolt with a fastening nut, the second mounting plate 43 and the fixing member body 441 can be fixed together, so that the second mounting plate 43 and the fixing member 44 are fixedly connected. In other embodiments, the fixing member 44 may be fixedly connected to the second mounting plate 43 by connection means such as riveting, snap-fitting, bonding, etc.

[0050] In some embodiments, as Figure 6 shown in Figure 6 , the fixing member 44 may further include a snap-fitting portion 443 provided on the fixing member body 441. The snap-fitting portion 443 includes a connecting portion 4431 and an extending portion 4432. The connecting portion 4431 is connected to a side of the fixing member body 441 facing away from the second mounting plate 43. The extending portion 4432 is connected to one end of the connecting portion 4431 away from the fixing member body 441 and extends in a direction parallel to the surface of the fixing member body 441, thereby forming a snap-fitting groove 4433 with the connecting portion 4431 and the fixing member body 441. A part of the nut 422 is snap-fitted in the snap-fitting groove 4433 to be fixedly connected to the fixing member 44.

[0051] The fixing member 44 may include at least two snap-fitting portions 443. The fixing member 44 is snap-fitted with different parts of the nut 422 through the at least two snap-fitting portions 443, thereby improving the connection stability between the fixing member 44 and the nut 422. As Figure 6 shown in Figure 6 , the fixing member 44 includes two oppositely arranged snap-fitting portions 443, which are snap-fitted with two opposite parts of the nut 422.

[0052] The lead screw 421 is relatively stationary with respect to the filter tank body 1 in a direction parallel to the filter screen. The lead screw 421 can be rotatably connected to the first mounting plate 5. For example, the lead screw 421 includes a lead screw body, the extending direction of the lead screw body is parallel to the surface of the filter screen, and threads are provided on a part of the outer peripheral wall of the lead screw body for threadedly connecting with the nut 422. One end of the lead screw body is fixedly connected to the output shaft of the motor 411, and the other end is rotatably connected to the first mounting plate 5. A bearing is disposed through the first mounting plate 5, the outer ring of the bearing is fixed within the first mounting plate 5, and one end of the lead screw body close to the first mounting plate 5 is inserted into and fixedly connected to the inner ring of the bearing, so that the lead screw 421 is rotatably connected to the first mounting plate 5, and the lead screw 421 is relatively stationary with respect to the filter tank body 1 and the first mounting plate 5 in a direction parallel to the filter screen. The first mounting plate 5 can provide support for the lead screw 421, so that the nut 422 moves linearly along the axial direction of the lead screw 421 more stably.

[0053] In some embodiments, as Figure 5 shown, the second mounting plate 43 is provided with a first avoidance groove 433. As Figure 6 shown, the fixing member body 441 is provided with a second avoidance groove 444. The first avoidance groove 433 and the second avoidance groove 444 are used for the lead screw 421 to pass through when the lead screw 421 passes through the fixing member 44 and the second mounting plate 43. A part of the lead screw 421 passes through the fixing member 44 and the second mounting plate 43 and is connected to the first mounting plate 5.

[0054] In some other embodiments, the lead screw 421 may not be connected to the first mounting plate 5, and the lead screw 421 is supported by the housing through the motor 411.

[0055] In some embodiments, the driving mechanism 4 is a crank-slider mechanism. Please refer to Figure 7 , which is a schematic diagram of a simple structure of the crank-slider mechanism and the connecting member 32 provided by an embodiment of the present application. The driving member 41 of the crank-slider mechanism includes a motor 411. As Figure 7 shown, the transmission assembly 42 of the crank-slider mechanism includes a crank 423 and a connecting rod 424. One end of the crank 423 is fixedly connected to the output shaft of the motor 411, the other end is rotatably connected to one end of the connecting rod 424, and the other end of the connecting rod 424 is rotatably connected to a part of the connecting member 32 extending out of the filter tank body 1, and the connecting member 32 is defined to move linearly along a direction parallel to the surface of the filter screen. Among them, as Figure 7As shown, the crank 423 includes opposite first end 423a and second end 423b. The first end 423a is fixedly connected to the output shaft of the motor 411, and the second end 423b is rotatably connected to the connecting rod 424. The connecting member 32 can be fixedly connected to the scraping member 31.

[0056] Wherein, when the output shaft of the motor 411 rotates, the crank 423 rotates following the output shaft to drive the connecting rod 424 to rotate, and further drives the connecting member 32 and the scraping member 31 to perform a linear reciprocating motion along a direction parallel to the surface of the filter net. Specifically, when the output shaft rotates, the crank 423 rotates around the first end 423a as the center and drives the connecting rod 424 to move. Driven by the connecting rod 424, the connecting member 32 moves linearly along a direction parallel to the surface of the filter net.

[0057] In some embodiments, the drive mechanism 4 includes a sliding guide member (not shown in the figure), which is provided on the outer wall of the filter tank body 1 and close to the first through hole 11. The extending direction of the sliding guide member is parallel to the surface of the filter net. The part of the connecting member 32 extending out of the filter tank body 1 is arranged on the sliding guide member and is slidably connected to the sliding guide member. The sliding guide member is used to guide the movement of the connecting member 32 to limit the connecting member 32 to perform a linear motion along a direction parallel to the surface of the filter net. In other embodiments, the sliding guide member can also be arranged inside the filter tank body 1. The part of the connecting member 32 located inside the filter tank body 1 is arranged on the sliding guide member and is slidably connected to the sliding guide member. The sliding guide member can also guide the connecting member 32.

[0058] The sliding guide member can be a slide rail, or a guide rail, or a linear bearing, or other structures with a linear guiding function.

[0059] In other some embodiments, the side wall of the filter tank body 1 has a certain thickness. The extending direction of the first through hole 11 is parallel to the surface of the filter net. The first through hole 11 can play a guiding role in the movement of the connecting member 32 to limit the connecting member 32 to perform a linear motion along a direction parallel to the surface of the filter net.

[0060] In some embodiments, the connecting member 32 can be understood as the slider in the crank-slider mechanism.

[0061] In some other embodiments, the part of the connecting member 32 extending out of the filter tank body 1 is fixedly connected to the slider in the crank-slider mechanism, and the slider is rotatably connected to the connecting rod 424, so that the connecting member 32 is rotatably connected to the connecting rod 424. The slider is defined to move linearly along a surface parallel to the filter net, so that the connecting member 32 is defined to move linearly along a surface parallel to the filter net. When the crank 423 rotates following the output shaft of the motor 411, the slider moves linearly along a surface parallel to the filter net, thereby driving the connecting member 32 to move linearly. Among them, the movement of the slider can be guided by arranging the above-mentioned sliding guide member to define the slider to move linearly along a surface parallel to the filter net.

[0062] In some embodiments, the driving mechanism 4 is a cam mechanism. Please refer to Figure 8 , which is a schematic diagram of a simple structure of the cam mechanism and the connecting member 32 provided by an embodiment of the present application. The driving member 41 of the cam mechanism includes a motor 411. As Figure 8 shown, the transmission component 42 of the cam mechanism includes a cam 425 and an elastic member 426. The elastic member 426 is located inside the filter tank body 1 and on a side of the filter tank body 1 away from the cam 425, and the elastic member 426 can elastically deform in a direction parallel to the surface of the filter net. The outer peripheral wall 4251 of the cam 425 includes a driving section 4251a and a non-driving section 4251b, the output shaft of the motor 411 is fixedly connected to the eccentric position 4252 of the cam 425, and the driving section 4251a is farther away from the eccentric position 4252 than the non-driving section 4251b. The extending direction of the connecting member 32 is parallel to the surface of the filter net, and the part of the connecting member 32 extending out of the filter tank body 1 contacts the outer peripheral wall 4251 of the cam 425. The connecting member 32 can be fixedly connected to the scraping member 31.

[0063] In some embodiments, the part of the connecting member 32 extending out of the filter tank body 1 can be fixedly connected to a roller, the roller contacts the outer peripheral wall 4251 of the cam 425, and the connecting member 32 contacts the outer peripheral wall 4251 through the roller. By arranging the roller, the friction between the connecting member 32 and the outer peripheral wall 4251 can be reduced, and the movement stability and reliability of the connecting member 32 and the cam mechanism can be improved.

[0064] When the output shaft of the motor 411 rotates, the driving section 4251a and the non-driving section 4251b alternately contact the connecting member 32. When the driving section 4251a contacts the connecting member 32, the cam 425 applies a thrust force to the connecting member 32 and the scraping member 31, causing the connecting member 32 and the scraping member 31 to move in a direction parallel to the surface of the filter mesh and compress the elastic member 426; when the non-driving section 4251b contacts the connecting member 32, the cam 425 stops applying the thrust force, and the elastic member 426 recovers its deformation and pushes the connecting member 32 and the scraping member 31 towards the cam 425.

[0065] The elastic member 426 includes, but is not limited to, a spring.

[0066] In some embodiments, the driving mechanism 4 is a non-rotating yoke mechanism. Please refer to Figure 9 , which is a schematic diagram of the simple structure of the non-rotating yoke mechanism and the connecting member 32 provided in an embodiment of the present application. The driving member 41 includes a motor 411. As Figure 9 shown, the transmission assembly 42 includes a crank 423, a pushing member 427, and a sliding rod 428. The first end 423a of the crank 423 is fixedly connected to the output shaft of the motor 411, and the second end 423b of the crank 423 is connected to the pushing member 427. The sliding rod 428 is provided with a chute 428a, and the pushing member 427 is embedded in the chute 428a and can slide along the chute 428a. The sliding rod 428 is defined to move in a straight line parallel to the surface of the filter mesh. The part of the connecting member 32 extending out of the filter tank body 1 is fixedly connected to the sliding rod 428, and the connecting member 32 can be fixedly connected to the scraping member 31.

[0067] As Figure 9 shown, the sliding rod 428 may include a first sliding rod portion 428b and a second sliding rod portion 428c that are perpendicular to each other. The first sliding rod portion 428b may be provided with the chute 428a, and the second sliding rod portion 428c is fixedly connected to the connecting member 32. The extending direction of the second sliding rod portion 428c may be parallel to the surface of the filter mesh.

[0068] The part of the pushing member 427 embedded in the chute 428a may be a circular column to reduce friction, so that the crank 423 can slide smoothly between the two ends of the chute 428a. Obviously, in other embodiments, the part of the pushing member 427 embedded in the chute 428a may also be other shapes, such as an oval column, etc.

[0069] In some embodiments, the driving member 427 includes a bearing and a connecting shaft. One end of the connecting shaft is fixedly connected to the inner ring of the bearing, and the other end is fixedly connected to the second end 423b of the crank 423. The bearing is embedded in the chute 428a and can slide along the chute 428a. The bearing can reduce the friction between the driving member 427 and the chute 428a, thereby reducing the frictional loss and energy consumption of the anti-rotation yoke mechanism and improving the movement stability.

[0070] In some other embodiments, the driving member 427 can also be a cylindrical or elliptical cylindrical convex post extending from the second end 423b of the crank 423, such as a cylindrical or elliptical cylindrical pin and other structures.

[0071] Wherein, when the output shaft of the motor 411 rotates, the crank 423 rotates following the output shaft and performs a rotational motion centered on the first end 423a and with the length of the crank 423 as the radius, thereby driving the driving member 427 to perform a rotational motion centered on the first end 423a and with the length of the crank 423 as the radius and slide along the chute 428a. The slide bar 428 is stressed and drives the connecting member 32 and the scraping member 31 to perform a linear reciprocating motion along a direction parallel to the surface of the filter screen.

[0072] Specifically, the crank 423 performs a rotational motion centered on the first end 423a and with the length of the crank 423 as the radius. The driving member 427 is driven by the second end 423b of the crank 423 to perform a circular motion centered on the first end 423a and with the length of the crank 423 as the radius. While the driving member 427 performs a circular motion, it also slides along the chute 428a. When the driving member 427 slides in the chute 428a, it exerts a force on the chute wall of the chute 428a, causing the slide bar 428 to perform a linear reciprocating motion under the action of linear guidance.

[0073] Exemplarily, please refer to Figures 9 to 12 , Figure 10 is Figure 9 a schematic diagram of the anti-rotation yoke mechanism and the connecting member 32 at the T1 moment when the crank 423 rotates clockwise in Figure 11 is Figure 9 a schematic diagram of the anti-rotation yoke mechanism and the connecting member 32 at the T2 moment when the crank 423 rotates clockwise in Figure 12 is Figure 9 a schematic diagram of the anti-rotation yoke mechanism and the connecting member 32 at the T3 moment when the crank 423 rotates clockwise in Figure 9As shown, the crank 423 rotates in the clockwise direction. Driven by the second end 423b of the crank 423, the pusher 427 performs a clockwise circular motion centered on the first end 423a with the length of the crank 423 as the radius. While the pusher 427 performs a clockwise circular motion, it also slides along the chute 428a. When the pusher 427 slides within the chute 428a, it exerts a force on the chute wall of the chute 428a, causing the slide bar 428 to move linearly in the Figure 9 X direction shown and move to the Figure 10 position shown. The crank 423 continues to rotate clockwise, and the slide bar 428 moves linearly in the Figure 10 X direction shown and moves to the Figure 11 limit position shown, that is, the position where the slide bar 428 can reach the farthest from the first end 423a in the X direction. When the crank 423 continues to rotate clockwise, the slide bar 428 moves linearly in the Figure 11 Y direction shown and moves to the Figure 12 position shown. Thus, the linear reciprocating motion of the connecting member 32 and the scraping member 31 is realized.

[0074] Among them, when the rotation angle θ of the crank 423 is 90° (as shown in Figure 11 ), the slide bar 428 moves to the limit position in the X direction; when the rotation angle θ is 270°, the slide bar 428 moves to the limit position in the Y direction; when the rotation angle θ is 0°, 180°, 360°, the slide bar 428 is located at the middle position of the linear reciprocating motion stroke.

[0075] The distance from the limit position of the slide bar 428 in the X direction to the first end 423a of the crank 423 is equal to the distance from the limit position of the slide bar 428 in the Y direction to the first end 423a of the crank 423, and both are equal to the length of the crank 423. When the crank 423 rotates one week, the slide bar 428 can move to the limit positions in the X direction and the Y direction once respectively. The single - stroke distance of the slide bar 428 is twice the length of the crank 423. Thus, the single - stroke distance of the connecting member 32 is also twice the length of the crank 423.

[0076] The length of the crank 423 is less than or equal to half of the length of the chute 428a, preventing the crank 423 from being too long and getting stuck, so that the slide bar 428 can continuously perform linear reciprocating motion along with the cyclic rotational motion of the crank 423.

[0077] In some embodiments, the movement of the slide bar 428 can be guided by setting the aforementioned sliding guide, so as to define that the slide bar 428 moves linearly along a plane parallel to the surface of the filter screen.

[0078] In some embodiments, the drive mechanism 4 is a cylinder-slider mechanism. Please refer to Figure 13 , which is a schematic diagram of the simple structure of the cylinder-slider mechanism and the connecting member 32 provided by an embodiment of the present application. As Figure 13 shown, the driving member 41 includes a cylinder body 412 and a piston 413 located inside the cylinder body 412. The axial direction of the cylinder body 412 is parallel to the surface of the filter screen. The piston 413 divides the inner cavity of the cylinder body 412 into two chambers 412a. The piston 413 can slide along the axial direction of the cylinder body 412. The transmission assembly 42 includes a piston rod 429. One end of the piston rod 429 is fixedly connected to one side of the piston 413 close to one of the chambers 412a, and the other end is fixedly connected to the part of the connecting member 32 extending out of the filter tank body 1. The cylinder body 412 can be installed and fixed on the housing.

[0079] Among them, by adjusting the pressure difference between the two chambers 412a, the piston 413 makes a linear reciprocating motion, and then drives the piston rod 429, the connecting member 32 and the scraper member 31 to make a linear reciprocating motion along a direction parallel to the surface of the filter screen. For example, through holes can be opened in both of the two chambers 412a for air intake and exhaust. Air intake operation can be performed on one of the two chambers 412a, and exhaust operation can be performed on the other chamber 412a, so that the pressures of the two chambers 412a are different. By controlling the alternate air intake and exhaust operations of the two chambers 412a, the piston 413 can make a linear reciprocating motion along the axial direction of the cylinder body 412. Liquid intake and drainage operations can also be performed on the two chambers 412a respectively to make the pressures of the two chambers 412a different.

[0080] In some embodiments, the connecting member 32 can be understood as the slider in the cylinder-slider mechanism.

[0081] In other embodiments, the part of the connecting member 32 extending out of the filter tank body 1 is fixedly connected to the slider in the cylinder-slider mechanism, and the slider is fixedly connected to the piston rod 429, so that the connecting member 32 is fixedly connected to the piston rod 429. When the piston 413 makes a linear reciprocating motion, it drives the piston rod 429, the slider of the cylinder-slider mechanism and the connecting member 32 to make a linear reciprocating motion. Among them, the movement of the slider of the cylinder-slider mechanism can be guided by setting the above-mentioned sliding guide, so as to define that the slider of the cylinder-slider mechanism moves linearly along a plane parallel to the surface of the filter screen.

[0082] Please refer to Figure 14 , which is a schematic structural diagram of the scraper assembly 3 provided by the embodiment of the present application. In some embodiments, as Figure 14 shown, the scraper assembly 3 further includes a frame body 33 and at least one guide member 34 located inside the filter tank body 1. The scraper member 31 is fixedly connected to the frame body 33 and faces the filter net. The guide member 34 is movably connected to the frame body 33 and fixedly connected to the filter tank body 1. The connecting member 32 is fixedly connected to the frame body 33, and the guide member 34 is movably connected to the connecting member 32 and the scraper member 31.

[0083] When the driving mechanism 4 drives the connecting member 32 to move in a direction parallel to the filter net, the frame body 33 and the scraper member 31 follow the connecting member 32 to move in the same direction. The extending direction of the guide member 34 is parallel to the surface of the filter net. The guide member 34 can provide support for the frame body 33, the connecting member 32 and the scraper member 31 and guide the movement of the frame body 33, the connecting member 32 and the scraper member 31, so that the linear movement of the frame body 33, the connecting member 32 and the scraper member 31 is more stable.

[0084] As Figure 4 shown, the first mounting plate 5 may be provided with at least one fourth mounting hole 52. The guide member 34 sequentially passes through the filter tank body 1 and the fourth mounting hole 52. The part of the guide member 34 passing through the fourth mounting hole 52 is provided with an external thread, and a fastening nut can be used to threadedly connect with the part of the guide member 34 passing through the fourth mounting hole 52 to lock the guide member 34 and the first mounting plate 5.

[0085] In some embodiments, the scraper assembly 3 may include at least two guide members 34. The arrangement direction of the at least two guide members 34 is parallel to the surface of the filter net, and the at least two guide members 34 are respectively arranged on opposite sides of the connecting member 32. By arranging at least two guide members 34 on opposite sides of the connecting member 32, a more balanced supporting force can be provided for the frame body 33, the connecting member 32 and the scraper member 31 and it is beneficial for guiding, thereby further improving the linear movement stability of the frame body 33, the connecting member 32 and the scraper member 31. As Figure 14 shown, the scraper assembly 3 includes two guide members 34, which are respectively located on opposite sides of the connecting member 32. In other embodiments, the number of the guide members 34 may be other values.

[0086] In some embodiments, the scraper assembly 3 includes a plurality of the connecting members 32. The plurality of connecting members 32 are all fixedly connected to the frame body 33 and all extend out of the filter tank body 1 to be connected to the driving mechanism 4. By providing the plurality of connecting members 32, the stability of the driving mechanism 4 driving the scraper assembly 3 to perform a linear motion can be improved. The arrangement direction of the plurality of connecting members 32 can be parallel to the surface of the filter screen.

[0087] In some embodiments, the filter tank 100 includes a plurality of filter screens and a plurality of scraper assemblies 3. The plurality of filter screens and the plurality of scraper assemblies 3 are in one-to-one correspondence. The filter screens and the scraper assemblies 3 are alternately arranged along the filtering direction. Each scraper assembly 3 is disposed opposite to a corresponding filter screen and is used to scrape the sample suspension on the corresponding filter screen. The connecting members 32 of the plurality of scraper assemblies 3 all extend out of the filter tank body 1 and are connected to the driving mechanism 4. The filtering direction refers to the flowing direction of the sample suspension during the filtering process.

[0088] Among them, the connecting members 32 of the plurality of scraper assemblies 3 all pass through the filter tank body 1 and the first mounting plate 5 and are fixedly connected to the second mounting plate 43.

[0089] By arranging the plurality of filter screens along the filtering direction, the sample suspension will pass through multi-level filtering, thereby improving the filtering accuracy. By providing the plurality of scraper assemblies 3, and each scraper assembly 3 is disposed opposite to a corresponding filter screen, the sample suspension on each filter screen can be scraped, so that the impurities in the sample suspension on each filter screen are evenly distributed.

[0090] Please refer to Figure 15 and Figure 16 , Figure 15 which are the exploded structure of the filter tank body 1 and the structural schematic diagram of the scraper assembly 3 provided by the embodiment of the present application, Figure 16 and which is the schematic diagram of the scraper assembly 3 located in the frame 12 provided by the embodiment of the present application. In some embodiments, as Figure 15 shown, the filter tank body 1 includes a plurality of frames 12. The plurality of frames 12 are stacked in sequence along the filtering direction, that is, the plurality of frames 12 are stacked together along the filtering direction, and each frame 12 has a filtering cavity 121. The filter screen is carried on the frame 12, and different filter screens are arranged in different filtering cavities 121. As Figure 15 and Figure 16 shown, at least part of the scraper assembly 3 is located in the filtering cavity 121, and different scraper assemblies 3 are arranged in different filtering cavities 121.

[0091] Each frame 12 is provided with the first through hole 11, and the connecting member 32 of each scraping assembly 3 passes through the first through hole 11 of the corresponding frame 12 and extends out of the frame 12. Further, the connecting member 32 also passes through the second through hole 51 of the first mounting plate 5 and is fixedly connected to the second mounting plate 43.

[0092] The guiding member 34 of each scraping assembly 3 passes through the fourth mounting hole 52 of the corresponding frame 12 and the first mounting plate 5 and is fixedly connected to the first mounting plate 5.

[0093] In some other embodiments, the filter tank body 1 can be integrally formed, and the plurality of filter meshes are fixedly arranged on the inner wall of the filter tank body 1 at intervals along the filtering direction.

[0094] The embodiment of the present application further provides a sample separation and extraction instrument, which includes the filter tank 100 described in any of the foregoing embodiments, and the filter tank 100 is used for filtering a sample suspension to obtain an extract. The sample separation and extraction instrument further includes a sampling tank and a storage tank. The sampling tank is used for accommodating a sample and diluting the sample to form a sample suspension, and the storage tank is communicated with the filter tank 100 and is used for receiving the extract filtered by the filter tank 100.

[0095] The sample separation and extraction instrument can also be a biological sample separation and extraction instrument, a plant sample separation and extraction instrument, etc. The biological sample separation and extraction instrument can be, for example, an intestinal bacteria separation and extraction instrument, a nucleic acid separation and extraction instrument, a protease separation and extraction instrument, or a separation and extraction instrument for separating and extracting other types of biological samples. The plant separation and extraction instrument can be, for example, a sweet tea separation and extraction instrument, a traditional Chinese medicine separation and extraction instrument, or a separation and extraction instrument for separating and extracting other types of plant samples.

[0096] In some embodiments, the sample separation and extraction instrument can be an intestinal bacteria separation and extraction instrument. The sampling tank is used for accommodating a fecal sample and diluting the fecal sample to form a fecal suspension. The filter tank 100 is used for filtering the fecal suspension to obtain an intestinal bacteria extract, and the storage tank is used for receiving the intestinal bacteria extract filtered by the filter tank 100.

[0097] The above are the implementation manners of the embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the embodiments of the present application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present application.

Claims

1. A filter tank, characterized in that, The filter tank includes: A filter tank body; A filter screen disposed inside the filter tank for filtering the sample suspension; A scraper assembly oppositely arranged with the filter screen. The scraper assembly includes a scraper member and a connecting member connected to each other. The scraper member is located inside the filter tank. One end of the connecting member is located inside the filter tank and connected to the scraper member, and the other end penetrates and extends out of the filter tank body; A driving mechanism connected to the part of the connecting member extending out of the filter tank for driving the connecting member to move, so as to drive the scraper member to perform a linear reciprocating motion along a direction parallel to the surface of the filter screen, so that the scraper member scrapes the sample suspension on the filter screen.

2. The filter tank according to claim 1, wherein, The driving mechanism is any one of a lead screw transmission mechanism, a cylinder slider mechanism, a cam mechanism, a crank slider mechanism, and a non-rotating yoke mechanism.

3. The filter tank according to claim 2, characterized in that, The driving mechanism includes a driving member and a transmission assembly. The transmission assembly is connected to the part of the connecting member extending out of the filter tank. The transmission assembly is used to convert the rotational motion or linear reciprocating motion of the driving member into the linear reciprocating motion of the connecting member and the scraper member along a direction parallel to the filter screen.

4. The filter tank according to claim 3, characterized in that, The driving mechanism is a lead screw transmission mechanism. The driving member includes a motor. The transmission assembly includes a lead screw and a nut. The lead screw is fixedly connected to the output shaft of the motor. The nut is sleeved on the lead screw. The nut is fixedly connected to the part of the connecting member extending out of the filter tank. The axial direction of the lead screw is parallel to the surface of the filter screen. Wherein, when the output shaft of the motor rotates forward and backward alternately, the lead screw rotates following the output shaft, and the nut performs a linear reciprocating motion along the axial direction of the lead screw, so as to drive the connecting member and the scraper member to perform a linear reciprocating motion along a direction parallel to the surface of the filter screen.

5. The filter tank according to claim 3, wherein The driving mechanism is a crank slider mechanism. The driving member includes a motor. The transmission assembly includes a crank and a connecting rod. One end of the crank is fixedly connected to the output shaft of the motor, and the other end is rotatably connected to one end of the connecting rod. The other end of the connecting rod is rotatably connected to the part of the connecting member extending out of the filter tank. The connecting member is limited to perform a linear motion along a direction parallel to the surface of the filter screen. Wherein, when the output shaft of the motor rotates, the crank rotates following the output shaft to drive the connecting rod to rotate, and further drive the connecting member and the scraper member to perform a linear reciprocating motion along a direction parallel to the surface of the filter screen.

6. The filter tank according to claim 3, characterized in that, The driving mechanism is a cam mechanism. The driving member includes a motor. The transmission assembly includes a cam and an elastic member. The elastic member is located inside the filter tank and on the side of the filter tank away from the cam. The elastic member can elastically deform in a direction parallel to the surface of the filter net. The output shaft of the motor is fixedly connected to the eccentric position of the cam. The outer peripheral wall of the cam includes a driving section and a non-driving section. The driving section is farther from the eccentric position than the non-driving section. The extending direction of the connecting member is parallel to the surface of the filter net. The part of the connecting member extending out of the filter tank contacts the outer peripheral wall of the cam. Wherein, when the output shaft of the motor rotates, the driving section and the non-driving section alternately contact the connecting member. When the driving section contacts the connecting member, the cam exerts a thrust force on the connecting member and the scraping member, so that the connecting member and the scraping member move in a direction parallel to the surface of the filter net and compress the elastic member. When the non-driving section contacts the connecting member, the cam stops exerting the thrust force, and the elastic member recovers its deformation and pushes the connecting member and the scraping member close to the cam.

7. The filter tank according to claim 3, characterized in that, The driving mechanism is a stop-turn yoke mechanism. The driving member includes a motor. The transmission assembly includes a crank, a pushing member and a sliding rod. The crank includes a first end and a second end arranged oppositely. The first end is fixedly connected to the output shaft of the motor, and the second end is connected to the pushing member. The sliding rod is provided with a chute. The pushing member is embedded in the chute and can slide along the chute. The sliding rod is defined to move in a straight line along a direction parallel to the surface of the filter net. The part of the connecting member extending out of the filter tank is fixedly connected to the sliding rod. Wherein, when the output shaft of the motor rotates, the crank rotates following the output shaft, and drives the pushing member to rotate around the first end of the crank and slide along the chute. The sliding rod is stressed and drives the connecting member and the scraping member to make a linear reciprocating motion in a direction parallel to the surface of the filter net.

8. The filter tank according to claim 3, wherein, The driving mechanism is a cylinder-slider mechanism. The driving member includes a cylinder body and a piston located inside the cylinder body. The axial direction of the cylinder body is parallel to the surface of the filter net. The piston divides the inner cavity of the cylinder body into two chambers. The piston can slide along the axial direction of the cylinder body. The transmission assembly includes a piston rod. One end of the piston rod is fixedly connected to one side of the piston close to one of the chambers, and the other end is fixedly connected to the part of the connecting member extending out of the filter tank. Wherein, by adjusting the pressure difference between the two chambers, the piston makes a linear reciprocating motion, and further drives the piston rod, the connecting member and the scraping member to make a linear reciprocating motion in a direction parallel to the surface of the filter net.

9. The filter tank according to claim 1, wherein The filter tank includes multiple filter screens and multiple scraper assemblies, which are alternately arranged along the filtering direction. Each scraper assembly is arranged opposite to a corresponding filter screen and is used to scrape the sample suspension on the corresponding filter screen. The connecting parts of the multiple scraper assemblies all extend out of the filter tank body and are connected to the driving mechanism.

10. The filter tank according to claim 1, characterized in that, The scraper assembly also includes a guide member located in the filter tank body, the guide member is fixedly connected to the filter tank body and movably connected to the connecting member and the scraper member, and the extension direction of the guide member is parallel to the surface of the filter screen.

11. The filter tank according to claim 1, characterized in that, The filter tank also includes a first mounting plate, and the driving mechanism includes a second mounting plate. The first mounting plate is mounted on the outer wall of the filter tank body, and the second mounting plate is located on the side of the first mounting plate facing away from the filter tank body. The surface of the second mounting plate is parallel to the surface of the first mounting plate. The connecting member passes through the filter tank body and the first mounting plate in sequence, and passes through the side of the first mounting plate facing away from the filter tank body. The part of the connecting member passing through the first mounting plate is fixedly connected to the second mounting plate.

12. A sample separation and extraction instrument, characterized in that, The sample separation and extraction instrument comprises the filter tank as described in any one of claims 1-11.

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