Hemodialysis filter and filtering system

Abstract

The invention relates to the technical field of hemodialysis, in particular to a hemodialysis filter and a filtering system.The hemodialysis filter comprises a tube body, end covers are detachably installed at the two ends of the tube body, and a liquid inlet and a liquid outlet which are communicated with the interior of the tube body are formed in the two ends of the tube body; the filter element is coaxial with a concentric structure arranged between the pipe body and the end cover; the one-way valve body is mounted on the liquid inlet; the compression pipe fitting and the plugging structure are communicated with the liquid outlet, and the compression pipe fitting and the plugging structure are linked, so that when the compression pipe fitting acts, the plugging structure can plug the liquid outlet; the storage assembly is connected with the pipe body and the compression pipe fitting, the storage assembly has two states of being combined with and separated from the compression pipe fitting, and when the storage assembly is separated from the compression pipe fitting, the compression pipe fitting can enable blood in the liquid outlet to flow back, and the situation that the filtering effect is reduced due to the fact that the filter element is blocked is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of hemodialysis, in particular to a hemodialysis filter and a filtering system. Background Art

[0002] Hemodialysis can be used to replace part of the excretion function of the kidneys. It is a commonly used method of blood purification in clinical practice. It mainly uses a machine to replace the kidneys to draw blood out of the patient's body, and then uses the dialyzer to play the functions of diffusion, convection, and adsorption to remove metabolic waste, regulate water and electrolyte balance, and regulate acid-base balance.

[0003] In the hemodialysis process, physical filtration is used first to filter out impurities in the blood, and then other methods are used to purify the blood. The materials involved in physical filtration mainly include filter elements. When blood passes through the filter element, impurities can be filtered out. However, as dialysis proceeds, the impurities on the filter element will increase, which reduces the filtering effect of the filter element. At this time, the filter element can only be replaced, which also leads to the interruption of hemodialysis and causes discomfort to patients. Summary of the invention

[0004] The object of the present invention is to provide a hemodialysis filter and a filtration system to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A hemodialysis filter, comprising:

[0007] A tube body, with end caps detachably mounted at both ends of the tube body, and a liquid inlet and a liquid outlet communicating with the interior of the tube body are disposed at both ends of the tube body;

[0008] A filter element coaxial with the concentric structure disposed between the tube body and the end cap;

[0009] A one-way valve body, mounted on the liquid inlet;

[0010] A compression tube and a plugging structure are connected to the liquid outlet, and the compression tube and the plugging structure are linked so that when the compression tube is in motion, the plugging structure can plug the liquid outlet;

[0011] A storage component is connected to the tube body and the compression tube. The storage component has two states: combined with the compression tube and separated from the compression tube. When the storage component is separated from the compression tube, the compression tube can cause the blood in the liquid outlet to flow back.

[0012] As a further solution of the present invention: the concentric structure comprises a first filter tube coaxially fixedly connected to one of the end caps and a second filter tube coaxially fixedly connected to the tube body, the first filter tube is provided with a convex ring capable of sealingly fitting with the inner wall of the tube body, and the second filter tube is connected to the annular plate in the tube body;

[0013] An annular conical surface matching each other is formed on one end of the first filter tube and the other end of the second filter tube.

[0014] As a further solution of the present invention: the compression pipe member comprises a sealing cylinder body detachably connected to the pipe body, a sealing plug is sealingly and slidably mounted in the sealing cylinder body, a connecting shaft coaxial with the sealing plug is arranged on the sealing plug, and an end of the connecting shaft away from the sealing plug penetrates the sealing cylinder body and forms a sliding connection portion;

[0015] A first cylindrical spring is also sleeved on the connecting shaft, one end of the first cylindrical spring is connected to the inner wall of the sealing cylinder body, and the other end is connected to the sealing plug.

[0016] As a further solution of the present invention: the blocking structure comprises a connecting sleeve connected to the liquid outlet, a fixing ring is fixedly installed in the connecting sleeve, and a rotating member that is sealingly and slidingly fitted with the fixing ring is rotatably installed in the connecting sleeve, and connecting holes are equidistantly arranged on the rotating member and the fixing ring in a circumferential manner;

[0017] When the communicating hole on the fixing ring overlaps with the communicating hole on the rotating member, the communicating sleeve is conductive.

[0018] As a further solution of the present invention: the connecting shaft and the rotating member are connected via a spiral structure, and the spiral structure can cause the rotating member to rotate when the connecting shaft moves;

[0019] The spiral structure comprises a connecting plate detachably connected to the connecting shaft, a follower sleeve is arranged at one end of the connecting plate away from the connecting shaft, and a convex shaft is arranged on the inner wall of the follower sleeve;

[0020] The spiral structure also includes a rotating shaft coaxially fixedly connected to the rotating member, the rotating shaft passes through the connecting sleeve, and a driving groove adapted to the convex shaft is provided on the rotating shaft.

[0021] As a further solution of the present invention: the driving groove includes a first vertical groove and a second vertical groove arranged along the axial direction of the rotating shaft, and the ends of the first vertical groove and the second vertical groove are connected to the spiral groove spirally arranged along the axial direction of the rotating shaft.

[0022] As a further solution of the present invention: the storage assembly includes a connecting member slidably connected to the sliding connecting portion, an inclined guide surface is formed at one end of the connecting member, and the connecting member is connected to the connecting shaft through a reset structure;

[0023] The storage assembly further comprises a guide rod mounted on the tube body and a follower plate slidably mounted on the guide rod, wherein the follower plate is connected to a driving device disposed on the tube body;

[0024] A traction frame is rotatably mounted on one end of the follower plate, a pulley is rotatably mounted on one end of the traction frame away from the follower plate, and a guide shaft is connected to the traction frame;

[0025] A guide groove is arranged on the side plate connected to the tube body, and the guide shaft can slide in the guide groove and drive the traction frame to deflect.

[0026] As a further solution of the present invention: the reset structure includes a transverse axis fixedly connected to the connecting piece, the transverse axis passes through the connecting shaft and is slidably arranged, and a second cylindrical spring is also sleeved on the transverse axis, one end of the second cylindrical spring is connected to the connecting shaft, and the other end is connected to the connecting piece.

[0027] As a further solution of the present invention: the guide groove includes an inclined groove and a third vertical groove arranged on the side plate, and when the guide shaft slides in the inclined groove, the traction frame can be deflected away from the tube body.

[0028] A filtering system comprises the hemodialysis filter.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The tube body, end cap and concentric structure can facilitate the replacement of the filter element, so that the tube body, end cap and other components can be recycled after disinfection, reducing the use cost and saving consumables; on the other hand, the blood can evenly contact the filter element when it enters the annular cavity formed between the tube body and the filter element, thereby improving the filtration uniformity of each area of ​​the filter element, avoiding problems such as blockage caused by local filtration concentration, and without the risk of blockage, it has the effect of making the blood flow faster, thereby achieving the purpose of accelerating the hemodialysis speed;

[0031] Through the linked compression pipe fittings and the sealing structure, as the hemodialysis proceeds, when the impurities on the filter element increase and cause the hemodialysis effect to decrease, the sealing plug quickly reverses to drive the blood to quickly flow back in the tube body, and causes the filter element to deform rapidly and slightly, so that the impurities adhering to the filter element are separated from the filter element. After part of the impurities blocking the filter element are peeled off, the filter element recovers part of its filtering performance, ensuring that the impurities blocking the filter element will not continue to accumulate and deteriorate the flow performance, thereby achieving the purpose of improving the hemodialysis speed;

[0032] By setting up the storage assembly, after the pulley pulls the connecting piece to move to a predetermined position, the traction frame can be separated from the connecting piece by deflection, so that the connecting shaft can be quickly reset under the action of the first cylindrical spring, and when the pulley moves in the opposite direction, it can cooperate with the inclined guide surface to make the connecting piece give way, thereby restoring the position state between the pulley and the connecting piece to the initial state, thereby ensuring that the pulley can cyclically and repeatedly drive the connecting piece to move, so as to ensure that the filter element can be subjected to multiple controllable impacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The figure is a schematic structural diagram of an embodiment of a hemodialysis filter.

[0034] Figure 2 This is a schematic structural diagram from another angle in one embodiment of a hemodialysis filter.

[0035] Figure 3 This is a cross-sectional view of a tube body in one embodiment of a hemodialysis filter.

[0036] Figure 4 This is an exploded view of the structure of the tube body and end cover in one embodiment of the hemodialysis filter.

[0037] Figure 5 This is a schematic diagram of the structure of a compression tube body and a storage component in one embodiment of a hemodialysis filter.

[0038] Figure 6 for Figure 5 A magnified view of the structure at center.

[0039] Figure 7 This is a schematic diagram of the internal structure of a sealing cylinder in one embodiment of a hemodialysis filter.

[0040] Figure 8 This is a structural explosion diagram of a storage component in one embodiment of a hemodialysis filter.

[0041] Fig. 9 This is a schematic diagram of the structure of a blocking structure in one embodiment of a hemodialysis filter.

[0042] Fig.10This is a schematic diagram of the structure of a rotating part and a fixed ring in an embodiment of a hemodialysis filter.

[0043] In the figure: 1, tube body; 101, liquid inlet; 102, liquid outlet; 2, end cover; 3, one-way valve body; 4, first filter tube; 5, second filter tube; 6, conduction hole; 7, filter element; 8, sealing cylinder; 9, first cylindrical spring; 10, sealing plug; 11, connecting shaft; 1101, sliding connection; 12, connecting piece; 1201, inclined guide surface; 13, horizontal axis; 14, second cylindrical spring; 15, connecting plate; 16, follower sleeve; 1601, convex shaft ; 17. rotating shaft; 1701. first vertical groove; 1702. spiral groove; 1703. second vertical groove; 18. rotating member; 19. fixing ring; 20. connecting hole; 21. connecting sleeve; 22. driving device; 23. follower plate; 2301. limiting protrusion; 24. guide rod; 2401. limiting groove; 25. traction frame; 2501. guide shaft; 26. pulley; 27. side plate; 2701. inclined groove; 2702. third vertical groove. DETAILED DESCRIPTION

[0044] 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.

[0045] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0046] See also Figures 1 to 10 In an embodiment of the present invention, a hemodialysis filter comprises: a tube body 1, a filter element 7, a one-way valve body 3, a compression pipe fitting and a plugging structure, and a storage assembly, so that as the hemodialysis proceeds, when the impurities on the filter element 7 increase and cause the hemodialysis effect to decrease, the sealing plug 10 quickly reverses to drive the blood to quickly flow back in the tube body 1, and the filter element 7 is quickly and slightly deformed, so that the impurities adhering to the filter element 7 are separated from the filter element 7, so that the filter element 7 recovers a part of the filtering performance, and the hemodialysis speed is improved, as follows:

[0047] The two ends of the tube body 1 are detachably mounted with end caps 2, and the two ends of the tube body 1 are provided with a liquid inlet 101 and a liquid outlet 102 communicating with the interior thereof;

[0048] The filter element 7 is coaxial with a concentric structure provided between the tube body 1 and the end cap 2, the concentric structure comprising a first filter tube 4 coaxially fixedly connected to one of the end caps 2 and a second filter tube 5 coaxially fixedly connected to the tube body 1, the first filter tube 4 is provided with a convex ring capable of sealingly fitting with the inner wall of the tube body 1, and the second filter tube 5 is connected to an annular plate in the tube body 1;

[0049] The first filter tube 4 and the second filter tube 5 are formed with mutually matching annular conical surfaces at the opposite ends thereof, and a plurality of conducting holes 6 are provided on the first filter tube 4 and the second filter tube 5;

[0050] After the filter element 7 is installed, one end of the filter element 7 is sealed against the convex ring, and the other end is sealed against the annular plate.

[0051] During assembly, first install the end cover 2 near the liquid outlet 102, then insert the clean and unused filter element 7 into the tube body 1, at this time the filter element 7 can be sleeved on the second filter tube 5, then insert the first filter tube 4 on the other end cover 2 into the filter element 7, and in the process of tightening the end cover 2, the convex ring and the annular plate work together with the two ends of the filter element 7, so that the two ends of the filter element 7 can be tightly fitted with the convex ring and the annular plate respectively, and the installation is completed.

[0052] When performing hemodialysis, the blood to be filtered enters the tube body 1 through the liquid inlet 101 and is located in the annular cavity formed between the tube body 1 and the filter element 7. At this time, the blood can also pass through the filter element 7 and then enter the first filter tube 4 or the second filter tube 5 through the conducting hole 6. During this process, the filter element 7 can filter impurities and harmful substances in the blood, and the filtered blood enters the liquid outlet 102 through the end of the second filter tube 5 away from the first filter tube 4, and after being processed again by the instrument, it flows back into the patient's body.

[0053] In this process, blood entering the annular cavity formed between the tube body 1 and the filter element 7 can evenly contact the filter element 7, thereby improving the filtering effect of each area of ​​the filter element 7, and has the effect of making the blood flow faster, thereby accelerating the hemodialysis rate.

[0054] Furthermore, after installation, the annular conical surfaces on the first filter tube 4 and the second filter tube 5 can be pressed against each other, so that when the end cover 2 and the first filter tube 4 are installed, there is an automatic positioning effect, ensuring the coaxiality of the filter element 7 and the tube body 1.

[0055] Through the above arrangement, on the one hand, the replacement of the filter element 7 can be facilitated, so that the tube body 1, end cover 2 and other components can be recycled after disinfection; on the other hand, the blood entering the annular cavity formed between the tube body 1 and the filter element 7 can be evenly contacted with the filter element 7, thereby improving the filtering effect of each area of ​​the filter element 7 and having the effect of making the blood flow faster, thereby accelerating the hemodialysis rate.

[0056] See also Figure 2 , Figure 5 , Figure 7 , Figure 9-10 , the one-way valve body 3 is installed on the liquid inlet 101;

[0057] The compression tube and the blocking structure are in communication with the liquid outlet 102, and the compression tube and the blocking structure are linked so that when the compression tube is in motion, the blocking structure can block the liquid outlet 102;

[0058] The compression pipe fitting comprises a sealing cylinder 8 detachably connected to the pipe body 1, a sealing plug 10 is sealingly and slidably installed in the sealing cylinder 8, a connecting shaft 11 coaxial with the sealing plug 10 is arranged on the sealing plug 10, and an end of the connecting shaft 11 away from the sealing plug 10 passes through the sealing cylinder 8 and forms a sliding connection part 1101;

[0059] The connecting shaft 11 is also sleeved with a first cylindrical spring 9, one end of which is connected to the inner wall of the sealing cylinder 8, and the other end of which is connected to the sealing plug 10;

[0060] The blocking structure includes a connecting sleeve 21 connected to the liquid outlet 102, a fixing ring 19 is fixedly installed in the connecting sleeve 21, and a rotating member 18 is rotatably installed in the connecting sleeve 21 to be in sealing and sliding contact with the fixing ring 19, and connecting holes 20 are equidistantly arranged on the rotating member 18 and the fixing ring 19 in a circumferential manner;

[0061] When the communicating hole 20 on the fixing ring 19 coincides with the communicating hole 20 on the rotating member 18 , the communicating sleeve 21 is conductive;

[0062] The connecting shaft 11 and the rotating member 18 are connected via a spiral structure, and the spiral structure can cause the rotating member 18 to rotate when the connecting shaft 11 moves;

[0063] The spiral structure includes a connecting plate 15 detachably connected to the connecting shaft 11, and a follower sleeve 16 is provided at one end of the connecting plate 15 away from the connecting shaft 11, and a convex shaft 1601 is provided on the inner wall of the follower sleeve 16;

[0064] The spiral structure also includes a rotating shaft 17 coaxially fixedly connected to the rotating member 18, the rotating shaft 17 passes through the connecting sleeve 21, and a driving groove adapted to the convex shaft 1601 is provided on the rotating shaft 17, the driving groove includes a first vertical groove 1701 and a second vertical groove 1703 arranged along the axial direction of the rotating shaft 17, and the ends of the first vertical groove 1701 and the second vertical groove 1703 are connected to a spiral groove 1702 spirally arranged along the axial direction of the rotating shaft 17.

[0065] As the hemodialysis proceeds, the impurities on the filter element 7 will increase, and the blood circulation will decrease. In this case, the storage assembly will act and pull the connecting shaft 11 to act. In the initial state, the sealing plug 10 is in contact with the side wall of the sealing cylinder 8 facing the liquid outlet 102, and the connecting hole 20 on the rotating member 18 and the fixing ring 19 is in a coincident state, that is, the connecting sleeve 21 is in a conducting state at this time to ensure that the blood can flow normally. When the connecting shaft 11 drives the sealing plug 10 to move toward the first cylindrical spring 9, the connecting shaft 11 will also drive the follower sleeve 16 to move along the length direction of the rotating shaft 17 through the connecting plate 15, and the convex shaft 160 1 moves along the second vertical groove 1703, the spiral groove 1702 and the first vertical groove 1701 in sequence, and when the convex shaft 1601 moves in the spiral groove 1702, the rotating shaft 17 can rotate, so that the rotating member 18 and the connecting hole 20 on the fixing ring 19 are misaligned, until when the convex shaft 1601 moves to the first vertical groove 1701, the rotating member 18 and the connecting hole 20 on the fixing ring 19 are completely misaligned, so that the connecting sleeve 21 is blocked, and then the connecting shaft 11 drives the sealing plug 10 to continue to move and continuously compresses the first cylindrical spring 9. In this process, the convex shaft 1601 always moves in the first vertical groove 1701, and the connecting sleeve 21 is always in a blocked state.

[0066] When the connecting shaft 11 moves to the predetermined position, the storage assembly can release the connecting shaft 11. At this time, the blood sucked into the sealed cylinder 8 is squeezed out. At the same time, since the connecting sleeve 21 is blocked, the blood can only flow back into the tube body 1 and impact the filter element 7 through the first filter tube 4 and the second filter tube 5. At this time, the filter element 7 can be rapidly and slightly deformed under the action of the impact force, so that the impurities adhering to the filter element 7 are separated from the filter element 7, so that the filter element 7 recovers a part of the filtering performance, thereby improving the hemodialysis rate.

[0067] When the connecting shaft 11 is reset, the rotating shaft 17 and the rotating member 18 will also be reset, and the connecting sleeve 21 will resume the conducting state, so that normal hemodialysis can be performed again.

[0068] Through the above arrangement, as the hemodialysis proceeds, when the impurities on the filter element 7 increase and cause the hemodialysis effect to decrease, the sealing plug 10 quickly reverses to drive the blood to quickly flow back in the tube body 1 and cause the filter element 7 to deform rapidly and slightly, so that the impurities adhering to the filter element 7 are separated from the filter element 7, so that the filter element 7 recovers some of its filtering performance and improves the hemodialysis speed.

[0069] It should be noted that after the impurities are separated from the filter element 7, as the filtration proceeds, the impurities tend to clog the filter element 7 again. At this time, the storage component can be activated again, but this method can only improve the filtration effect of the filter element 7 in a short period of time. If necessary, the filter element 7 must be replaced.

[0070] See also Figure 5-6 , Figure 8 The storage component is connected to the tube body 1 and the compression tube. The storage component has two states: combined with the compression tube and separated from the compression tube. When the storage component is separated from the compression tube, the compression tube can make the blood in the liquid outlet 102 flow back.

[0071] The storage assembly includes a connecting member 12 slidably connected to the sliding connection portion 1101, an inclined guide surface 1201 is formed at one end of the connecting member 12, and the connecting member 12 is connected to the connecting shaft 11 through a reset structure, the reset structure includes a transverse shaft 13 fixedly connected to the connecting member 12, the transverse shaft 13 penetrates the connecting shaft 11 and is slidably arranged, and a second cylindrical spring 14 is also sleeved on the transverse shaft 13, one end of the second cylindrical spring 14 is connected to the connecting shaft 11, and the other end is connected to the connecting member 12;

[0072] The storage assembly further comprises a guide rod 24 mounted on the tube body 1 and a follower plate 23 slidably mounted on the guide rod 24, wherein the follower plate 23 is connected to a driving device 22 disposed on the tube body 1. Specifically, the guide rod 24 is provided with a limiting groove 2401 along its length direction, and the limiting groove 2401 is slidably matched with a limiting protrusion 2301 disposed on the follower plate 23;

[0073] A traction frame 25 is rotatably mounted on one end of the follower plate 23, a pulley 26 is rotatably mounted on one end of the traction frame 25 away from the follower plate 23, and a guide shaft 2501 is connected to the traction frame 25;

[0074] A guide groove is provided on the side plate 27 connected to the tube body 1, and the guide shaft 2501 can slide in the guide groove and drive the traction frame 25 to deflect;

[0075] The guide groove includes an inclined groove 2701 and a third vertical groove 2702 provided on the side plate 27 . When the guide shaft 2501 slides in the inclined groove 2701 , the traction frame 25 can be deflected away from the tube body 1 .

[0076] When the filtering effect of blood decreases, the driving device 22 is controlled to operate. At this time, the driving device 22 can drive the pulley 26 to operate by pulling the follower plate 23, and the pulley 26 is in contact with the bottom of the connecting member 12, so that the connecting member 12 can follow the pulley 26 to move toward the liquid inlet 101, and drive the connecting shaft 11 to operate in turn. As the follower plate 23 rises, the guide shaft 2501 on the traction frame 25 will move to the end of the third vertical groove 2702, and then the guide shaft 2501 will slide in the inclined groove 2701. At this time, the traction frame 25 can deflect away from the tube body 1, so that the pulley 26 is separated from the connecting member 12, and under the action of the first columnar spring 9, the connecting shaft 11 can be reset.

[0077] When the driving device 22 drives the follower plate 23 to reset, the guide shaft 2501 will move along the inclined groove 2701 and the third vertical groove 2702 in sequence, so that the traction frame 25 is reset while keeping the traction frame 25 parallel to the central axis of the tube body 1. At this time, when the pulley 26 abuts against the inclined guide surface 1201 on the connecting member 12, the connecting member 12 can be driven to move in the direction guided by the sliding connection part 1101 to make way, until the pulley 26 passes over the connecting member 12, and under the action of the second cylindrical spring 14, the connecting member 12 is reset, so that the state of the connecting member 12 and the pulley 26 is restored to the initial state.

[0078] Through the above arrangement, after the pulley 26 pulls the connecting member 12 to move to a predetermined position, the traction frame 25 can be separated from the connecting member 12 by deflection, so that the connecting shaft 11 can be quickly reset under the action of the first cylindrical spring 9, and when the pulley 26 moves in the opposite direction, it can cooperate with the inclined guide surface 1201 to make the connecting member 12 give way, and then the position state between the pulley 26 and the connecting member 12 is restored to the initial state, thereby ensuring that the pulley 26 can cyclically and repeatedly drive the connecting member 12 to move, so as to ensure that the filter element 7 can be subjected to multiple controllable impacts.

[0079] As an embodiment of the present invention, a filtration system is also proposed, including the hemodialysis filter.

[0080] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0081] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A hemodialysis filter, comprising: A tube body (1), end caps (2) being detachably mounted at both ends of the tube body (1), and a liquid inlet (101) and a liquid outlet (102) being arranged at both ends of the tube body (1) and communicating with the interior thereof; It is characterized by further comprising: A filter element (7) is coaxial with a concentric structure arranged between the tube body (1) and the end cover (2); A one-way valve body (3) mounted on the liquid inlet (101); A compression tube and a blocking structure are in communication with the liquid outlet (102); the compression tube and the blocking structure are linked so that when the compression tube is in motion, the blocking structure can block the liquid outlet (102); A storage component is connected to the tube body (1) and the compression tube. The storage component has two states: combined with the compression tube and separated from the compression tube. When the storage component is separated from the compression tube, the compression tube can cause the blood in the liquid outlet (102) to flow back.

2. A hemodialysis filter according to claim 1, characterized in that: The concentric structure comprises a first filter tube (4) coaxially fixedly connected to one of the end covers (2) and a second filter tube (5) coaxially fixedly connected to the tube body (1), the first filter tube (4) being provided with a convex ring capable of sealingly fitting with the inner wall of the tube body (1), and the second filter tube (5) being connected to an annular plate inside the tube body (1); An annular conical surface that matches each other is formed at the opposite end of the first filter tube (4) and the second filter tube (5).

3. A hemodialysis filter according to claim 1, characterized in that: The compression pipe fitting comprises a sealing cylinder (8) detachably connected to the pipe body (1), a sealing plug (10) is sealingly and slidably mounted inside the sealing cylinder (8), a connecting shaft (11) coaxial therewith is arranged on the sealing plug (10), and an end of the connecting shaft (11) away from the sealing plug (10) passes through the sealing cylinder (8) and forms a sliding connection portion (1101); A first cylindrical spring (9) is also sleeved on the connecting shaft (11), one end of the first cylindrical spring (9) is connected to the inner wall of the sealing cylinder body (8), and the other end is connected to the sealing plug (10).

4. A hemodialysis filter according to claim 3, characterized in that: The blocking structure comprises a connecting sleeve (21) connected to the liquid outlet (102), a fixing ring (19) is fixedly installed in the connecting sleeve (21), and a rotating member (18) is rotatably installed in the connecting sleeve (21) and is in sealing and sliding contact with the fixing ring (19), and connecting holes (20) are equidistantly arranged on the rotating member (18) and the fixing ring (19) in a circumferential manner; When the communicating hole (20) on the fixed ring (19) overlaps with the communicating hole (20) on the rotating member (18), the communicating sleeve (21) is conductive.

5. A hemodialysis filter according to claim 4, characterized in that: The connecting shaft (11) and the rotating member (18) are connected via a spiral structure, and the spiral structure can cause the rotating member (18) to rotate when the connecting shaft (11) moves; The spiral structure comprises a connecting plate (15) detachably connected to the connecting shaft (11); a follower sleeve (16) is provided at one end of the connecting plate (15) away from the connecting shaft (11); and a convex shaft (1601) is provided on the inner wall of the follower sleeve (16); The spiral structure also includes a rotating shaft (17) coaxially fixedly connected to the rotating member (18), the rotating shaft (17) passes through the connecting sleeve (21), and a driving groove adapted to the convex shaft (1601) is provided on the rotating shaft (17).

6. A hemodialysis filter according to claim 5, characterized in that: The driving groove comprises a first vertical groove (1701) and a second vertical groove (1703) arranged along the axial direction of the rotating shaft (17), and the ends of the first vertical groove (1701) and the second vertical groove (1703) are connected to a spiral groove (1702) spirally arranged along the axial direction of the rotating shaft (17).

7. A hemodialysis filter according to claim 3, characterized in that: The storage assembly comprises a connecting member (12) slidably connected to the sliding connection portion (1101), an inclined guide surface (1201) is formed at one end of the connecting member (12), and the connecting member (12) is connected to the connecting shaft (11) via a reset structure; The storage assembly further comprises a guide rod (24) mounted on the tube body (1) and a follower plate (23) slidably mounted on the guide rod (24), wherein the follower plate (23) is connected to a driving device (22) arranged on the tube body (1); A traction frame (25) is rotatably mounted on one end of the follower plate (23), a pulley (26) is rotatably mounted on one end of the traction frame (25) away from the follower plate (23), and a guide shaft (2501) is connected to the traction frame (25); A guide groove is provided on the side plate (27) connected to the tube body (1), and the guide shaft (2501) can slide in the guide groove and drive the traction frame (25) to deflect.

8. A hemodialysis filter according to claim 7, characterized in that: The reset structure comprises a transverse axis (13) fixedly connected to the connecting member (12); the transverse axis (13) penetrates the connecting shaft (11) and is slidably arranged; a second cylindrical spring (14) is also sleeved on the transverse axis (13); one end of the second cylindrical spring (14) is connected to the connecting shaft (11), and the other end is connected to the connecting member (12).

9. A hemodialysis filter according to claim 7, characterized in that: The guide groove comprises an inclined groove (2701) and a third vertical groove (2702) arranged on the side plate (27); when the guide shaft (2501) slides in the inclined groove (2701), the traction frame (25) can deflect away from the tube body (1).

10. A filtering system, characterized in that: It comprises the hemodialysis filter according to any one of claims 1 to 9.

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