Hemodialysis device for nephrology department and accessory thereof

Abstract

The invention relates to the technical field of medical instruments, in particular to a hemodialysis device for the nephrology department and accessories thereof.The hemodialysis device for the nephrology department comprises a first shell and a second shell, the opposite end faces of the first shell and the second shell are each provided with a jacking ring, and each jacking ring is provided with a wavy end face; the first shell and the second shell are jointly sleeved with a connecting ring, a first sealing gasket and a second sealing gasket are coaxially and rotationally arranged on the inner wall of the connecting ring, the first sealing gasket and the second sealing gasket are located between the first shell and the second shell, and a first tightening ring is rotationally arranged between the first shell and the connecting ring. A second tightening ring is rotatably arranged between the second shell and the connecting ring, rotation of the first tightening ring can push the first shell, so that a jacking ring of the first shell extrudes the first sealing gasket, rotation of the second tightening ring can push the second shell, so that a jacking ring of the second shell upwards extrudes the second sealing gasket, and the second sealing gasket is tightly pressed; and therefore, the first sealing gasket and the second sealing gasket form wave-shaped sealing surfaces.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a nephrology hemodialysis device and its accessories. Background Art

[0002] Hemodialysis is one of the renal replacement therapies for patients with acute and chronic renal failure. Hemodialysis usually uses a dialyzer, which drains blood from the body into the dialyzer. The blood and an electrolyte solution containing electrolytes at concentrations similar to those in the body exchange substances inside and outside the hollow fibers through the principles of diffusion, ultrafiltration, adsorption and convection, thereby removing metabolic waste from the body and maintaining electrolyte and acid-base balance. At the same time, it removes excess water from the body and returns the purified blood.

[0003] The existing dialyzers are usually designed with a detachable shell to facilitate the reuse of the shell. The shell includes an upper shell and a lower shell. In order to ensure the sealing effect, a sealing gasket is arranged between the upper shell and the lower shell. Since the sealing gasket will suffer elastic fatigue after long-term and frequent use, the sealing effect will gradually deteriorate, thereby affecting the use effect of the dialyzer. Summary of the invention

[0004] Based on this, it is necessary to provide a nephrology hemodialysis device and its accessories to address the technical problem of poor sealing effect of the current dialyzer after long-term use.

[0005] The above purpose is achieved through the following technical solutions: A hemodialysis device for nephrology comprises a first shell and a second shell that are coaxially connected, the first shell is located above the second shell, the first shell and the second shell are symmetrically arranged and have the same structure, and the end faces of the first shell and the second shell opposite to each other are both provided with a top pressure ring, and the top pressure ring has a wavy end face; the first shell and the second shell are both sleeved with a connecting ring on their exteriors, the inner wall of the connecting ring is coaxially rotated with a first sealing gasket and a second sealing gasket, the first sealing gasket and the second sealing gasket are located between the first shell and the second shell, and the first sealing gasket and the second sealing gasket are symmetrically arranged and have the same structure; A first tightening ring is rotatably provided between the first shell and the connecting ring, and a second tightening ring is rotatably provided between the second shell and the connecting ring. The first tightening ring and the second tightening ring are symmetrically arranged and have the same structure. The rotation of the first tightening ring can push the first shell to move downward, so that the top pressure ring of the first shell squeezes the first sealing gasket. The rotation of the second tightening ring can push the second shell to move upward, so that the top pressure ring of the second shell squeezes the second sealing gasket upward, thereby forming a wavy sealing surface for both the first sealing gasket and the second sealing gasket.

[0006] Furthermore, a first driving ring and a second driving ring are slidably provided inside the connecting ring, the first driving ring and the second driving ring are symmetrically arranged and have the same structure, the first tightening ring is located above the first driving ring, and the second tightening ring is located below the second driving ring, the downward movement of the first tightening ring can push the first driving ring to move downward, and the upward movement of the second tightening ring can push the second driving ring to move upward; the first sealing gasket and the second sealing gasket both include metal rings, and a plurality of wedge blocks are arranged at intervals in the circumferential direction of the metal rings, and a plurality of pressing blocks are arranged in the circumferential direction of the first driving ring and the second driving ring, and the pressing blocks extend in the up-and-down directions, and the pressing blocks correspond to the wedge blocks one by one, and the pressing blocks cooperate with the wedge blocks to drive the first sealing gasket or the second sealing gasket to rotate, and then the downward movement of the first driving ring can drive the first sealing gasket to rotate around the axis of the first shell, and the upward movement of the second driving ring can drive the second sealing gasket to rotate around the axis of the second shell.

[0007] Furthermore, a rubber ring is coaxially fixed on the metal ring, the outer diameter of the rubber ring is smaller than that of the metal ring, the rubber ring is located on the side of the metal ring facing the first shell or the second shell, and the rubber ring and the top pressure ring are pressed together to form the wavy sealing surface.

[0008] Furthermore, the inner wall of the connecting ring is provided with two upper and lower ring grooves, and the two metal rings are rotatably arranged in the corresponding ring grooves respectively. The outer peripheral surface of the metal ring is provided with a plurality of limit grooves, and a limit block is slidably arranged in the limit groove. The limit block slides along the radial direction of the metal ring. A third spring is connected between the limit block and the limit groove, and the inner wall of the ring groove is provided with a plurality of clamping grooves. The third spring has a tendency to make the limit block extend from the limit groove and enter the clamping groove.

[0009] Furthermore, the limit block and the slot are both V-shaped.

[0010] Furthermore, the inner wall of the connecting ring is provided with a plurality of first sliding grooves and a plurality of second sliding grooves, both of which extend along the axial direction of the connecting ring, and a plurality of first sliding blocks are provided in the circumferential direction of the first driving ring, the first sliding blocks correspond one-to-one to the first sliding grooves and the first sliding blocks can slide along the first sliding grooves, a first spring is provided between the first sliding blocks and the first sliding grooves, and the first spring has a tendency to keep the first driving ring away from the first sealing gasket; the second driving ring is provided with a plurality of second sliding blocks in the circumferential direction, the second sliding blocks correspond one-to-one to the second sliding grooves and the second sliding grooves can slide along the second sliding grooves, a second spring is provided between the second sliding blocks and the second sliding grooves, and the second spring has a tendency to keep the second driving ring away from the second sealing gasket.

[0011] Furthermore, the inner circumferences of the first tightening ring and the second tightening ring are each provided with a plurality of rolling adjustment components, the rolling adjustment components comprising an articulated seat, a hinge shaft extending in a horizontal direction being provided in the articulated seat, a push rod being rotatably provided on the articulated shaft, an end of the push rod away from the articulated shaft being press-fitted with a push ring, a screw being fixedly provided on the push rod, the screw being parallel to the push rod, and a rotating ring being rotatably connected to the screw, the screw having a spiral groove, a protrusion being provided on the inner circumference of the rotating ring, the protrusion being able to move along the spiral groove, a roller being provided on the outer anti-rotation assembly of the rotating ring, and when the push rod is in a horizontal state, the roller being able to roll in contact with the push ring; when the roller rotates and drives the rotating ring to rotate synchronously, and when the protrusion moves to the end of the spiral groove, the rotating ring stops rotating, so that the roller and the push ring are in sliding contact.

[0012] Furthermore, a telescopic groove is provided between two adjacent rolling adjustment components of the first tightening ring and the second tightening ring, a telescopic block is slidably provided in the telescopic groove, the telescopic block extends along the axial direction of the connecting ring, a fourth spring is provided between the telescopic block and the telescopic groove, and the fourth spring has a tendency to make the telescopic block extend from the telescopic groove; the telescopic block on the first tightening ring is used to push the first driving ring, and the telescopic block of the second tightening ring is used to push the second driving ring.

[0013] Furthermore, a partition is provided in the middle of the connecting ring, and the partition is located between the two ring grooves; the partition is engaged with the first sealing gasket and the second sealing gasket on a side away from the rubber ring.

[0014] An accessory for a nephrology hemodialysis device is used to connect to the above-mentioned nephrology hemodialysis device, including a blood pipeline, a dialysate pipeline and a waste liquid pipeline. The blood pipeline draws out the blood of the human body and sends it into a first shell and a second shell for filtration before returning it to the human body; the dialysate pipeline is used to transport the dialysate to the inside of the first shell and the second shell, and the waste liquid pipeline is used to draw out the waste liquid generated after filtration from the first shell and the second shell.

[0015] The beneficial effects of the present invention are: The nephrology hemodialysis device and its accessories provided by the present invention, first, by arranging wavy end surfaces on the first shell and the second shell, the first sealing gasket and the second sealing gasket are compressed to form a wavy sealing surface, thereby increasing the sealing contact area and improving the sealing effect between the first shell and the second shell.

[0016] Second, the downward movement of the first tightening ring can push the first driving ring downward, and then the first driving ring can drive the first sealing gasket to rotate around the axis of the first shell; the upward movement of the second tightening ring can push the second driving ring upward, and then the second driving ring can drive the second sealing gasket to rotate around the axis of the second shell; the rotation of the first sealing gasket and the second sealing gasket changes the extrusion position of the top pressure ring of the first shell and the first sealing gasket, as well as the extrusion position of the top pressure ring of the second shell and the second sealing gasket, thereby avoiding elastic fatigue caused by long-term compression deformation of certain positions of the first sealing gasket and the second sealing gasket, thereby extending the service life of the first sealing gasket and the second sealing gasket and ensuring the sealing effect of the first shell and the second shell.

[0017] Third, by setting up a rolling adjustment component, the rotation of the first tightening ring and the second tightening ring causes the roller to uniformly squeeze the circumferential direction of the top pressure ring, thereby making the formed wave-shaped sealing surface more evenly stressed. The rolling of the roller drives the rotating ring to rotate synchronously. When the protrusion of the rotating ring moves to the end of the spiral groove, the rotating ring stops rotating, causing the roller and the top pressure ring to come into sliding contact, thereby instantly increasing the rotation resistance of the first tightening ring and the second tightening ring, which can remind medical personnel that they have been tightened in place and do not need to be tightened further.

[0018] Fourth, by adjusting the number of spiral turns of the spiral groove, the number of rolling turns of the roller on the top pressure ring can be controlled, so that the clamping force between the top pressure ring and the rubber ring is maintained within an appropriate range, avoiding excessive clamping force of the top pressure ring on the rubber ring causing damage to the rubber ring or too little clamping force causing poor sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a hemodialysis device for nephrology provided in one embodiment of the present invention; Figure 2 for Figure 1 A front view of Figure 3 for Figure 2 Middle AA section view; Figure 4 for Figure 3 A magnified view of the structure at X in the middle; Figure 5 for Figure 3 Middle BB section view; Figure 6 for Figure 5 A magnified view of the structure at Y in the middle; Figure 7 An explosion diagram of a hemodialysis device for nephrology provided by one embodiment of the present invention; Figure 8 A schematic diagram of the structure of a first driving ring and a first sealing gasket in a hemodialysis device for nephrology provided in one embodiment of the present invention; Fig. 9 A schematic diagram of the structure of a first tightening ring in a hemodialysis device for nephrology provided by one embodiment of the present invention; Fig.10 for Fig. 9 A magnified view of the structure at Z in the middle; Fig.11 An exploded schematic diagram of a rolling adjustment assembly in a hemodialysis device for nephrology provided by one embodiment of the present invention; Fig.12 A schematic diagram of the structure of a connecting ring in a hemodialysis device for nephrology provided by one embodiment of the present invention; Fig.13 A schematic structural diagram of a nephrology hemodialysis device and its accessories provided in one embodiment of the present invention.

[0020] in: 100, connecting ring; 101, partition; 102, ring groove; 103, first slide groove; 104, card groove; 105, second slide groove; 200, first shell; 201, upper end cover; 202, blood inlet; 203, waste liquid outlet; 210, top pressure ring; 300, second shell; 301, lower end cover; 302, blood outlet; 303, dialysate inlet; 400, first tightening ring; 410, external thread; 411, telescopic groove; 420, telescopic block; 430, push rod; 431, screw; 432, hinge shaft; 4 40. Roller; 450. Rotating ring; 500. First drive ring; 501. First spring; 502. Pressing block; 503. First slider; 600. First sealing gasket; 601. Metal ring; 602. Rubber ring; 603. Wedge block; 604. Locking groove; 605. Limiting block; 606. Third spring; 700. Second sealing gasket; 800. Second drive ring; 900. Second tightening ring; 1000. Nephrology hemodialysis device; 1001. Blood pipeline; 1002. Waste liquid pipeline; 1003. Dialysate pipeline. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0023] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] like Figures 1 to 12As shown, a hemodialysis device 1000 for nephrology provided by one embodiment of the present invention comprises a first shell 200 and a second shell 300 coaxially connected, the first shell 200 is located above the second shell 300, the first shell 200 and the second shell 300 are symmetrically arranged and have the same structure, and the end faces of the first shell 200 and the second shell 300 facing each other are provided with a top pressure ring 210, and the top pressure ring 210 has a wavy end face; the first shell 200 and the second shell 300 are jointly sleeved with a connecting ring 100 on the outside, and the inner wall of the connecting ring 100 is coaxially rotated with a first sealing gasket 600 and a second sealing gasket 700, the first sealing gasket 600 and the second sealing gasket 700 are located between the first shell 200 and the second shell 300, and the first sealing gasket 600 and the second sealing gasket 700 are located between the first shell 200 and the second shell 300, and the first sealing gasket 600 and the second sealing gasket 700 are located between the first shell 200 and the second shell 300. A sealing gasket 600 and a second sealing gasket 700 are symmetrically arranged and have the same structure; a first tightening ring 400 is rotatably provided between the first shell 200 and the connecting ring 100, and a second tightening ring 900 is rotatably provided between the second shell 300 and the connecting ring 100. The first tightening ring 400 and the second tightening ring 900 are symmetrically arranged and have the same structure. The rotation of the first tightening ring 400 can push the first shell 200 to move downward, so that the top pressure ring 210 of the first shell 200 squeezes the first sealing gasket 600. The rotation of the second tightening ring 900 can push the second shell 300 to move upward, so that the top pressure ring 210 of the second shell 300 squeezes the second sealing gasket 700 upward, thereby forming a wavy sealing surface for both the first sealing gasket 600 and the second sealing gasket 700.

[0025] The present invention provides wavy end surfaces on the first shell 200 and the second shell 300 so that the first sealing gasket 600 and the second sealing gasket 700 are compressed to form wavy sealing surfaces, thereby increasing the sealing contact area and improving the sealing effect between the first shell 200 and the second shell 300.

[0026] like Figure 1 As shown, the first shell 200 is provided with an upper end cover 201, the upper end cover 201 is provided with a blood inlet 202, the second shell 300 is provided with a lower end cover 301, the lower end cover 301 is provided with a blood outlet 302, the blood passes through the first shell 200 and the second shell 300 from top to bottom, the second shell 300 is also provided with a dialysate inlet 303, the first shell 200 is provided with a waste liquid outlet 203, the dialysate passes through the first shell 200 and the second shell 300 from bottom to top and is discharged from the waste liquid outlet 203. Hollow fiber membranes are installed inside the first shell 200 and the second shell 300, the blood flows through the inside of the hollow fiber membrane, and the dialysate flows through the outside of the hollow fiber membrane, so that the hollow fiber membrane allows the blood and the dialysate to exchange substances.

[0027] The outer circumferences of the first tightening ring 400 and the second tightening ring 900 are both provided with external threads 410 , and the inner circumference of the connecting ring 100 is provided with internal threads. The first tightening ring 400 , the second tightening ring 900 and the connecting ring 100 are threadedly matched.

[0028] like Figure 7 As shown, the interior of the connecting ring 100 is also slidably provided with a first drive ring 500 and a second drive ring 800, the first tightening ring 400 is located above the first drive ring 500, the first drive ring 500 and the second drive ring 800 are symmetrically arranged and have the same structure, the downward movement of the first tightening ring 400 can push the first drive ring 500 to move downward, and then the first drive ring 500 can drive the first sealing gasket 600 to rotate around the axis of the first shell 200, the second tightening ring 900 is located below the second drive ring 800, the upward movement of the second tightening ring 900 can push the second drive ring 800 to move upward, and then the second drive ring 800 can drive the second sealing gasket 700 to rotate around the axis of the second shell 300.

[0029] like Figure 7 and Figure 8 As shown, the first sealing gasket 600 and the second sealing gasket 700 both include a metal ring 601, on which a rubber ring 602 is coaxially fixed. The outer diameter of the rubber ring 602 is smaller than that of the metal ring 601. The rubber ring 602 is located on the side of the metal ring 601 facing the first shell 200 or the second shell 300. The rubber ring 602 is pressed together with the top pressure ring 210 to form the wavy sealing surface.

[0030] Furthermore, the metal ring 601 is provided with a plurality of wedge blocks 603 at intervals in the circumferential direction, and the wedge blocks 603 are located on the outer circumference of the rubber ring 602. The first drive ring 500 and the second drive ring 800 are provided with a plurality of pressing blocks 502 in the circumferential direction, and the pressing blocks 502 extend in the up-down direction, and the pressing blocks 502 correspond to the wedge blocks 603 one by one, and the pressing blocks 502 cooperate with the wedge blocks 603 to drive the first sealing gasket 600 or the second sealing gasket 700 to rotate. In this way, by rotating the first sealing gasket 600 and the second sealing gasket 700, the extrusion position of the top pressure ring 210 of the first shell 200 and the extrusion position of the top pressure ring 210 and the second sealing gasket 700 of the second shell 300 are changed, thereby avoiding elastic fatigue caused by long-term pressure on certain positions of the first sealing gasket 600 and the second sealing gasket 700, thereby extending the service life of the first sealing gasket 600 and the second sealing gasket 700 and ensuring the sealing effect of the first shell 200 and the second shell 300.

[0031] A locking groove 604 is formed between two adjacent wedge blocks 603. When the pressing block 502 slides into the locking groove 604, the first sealing gasket 600 and the second sealing gasket 700 no longer rotate, so that the first sealing gasket 600 and the second sealing gasket 700 can rotate at a certain angle.

[0032] like Figure 5 , Figure 6 and Fig.12 As shown, the inner wall of the connecting ring 100 is provided with two upper and lower ring grooves 102, and two metal rings 601 are rotatably arranged in the corresponding ring grooves 102, and the outer peripheral surface of the metal ring 601 is provided with a plurality of limiting grooves, and a limiting block 605 is slidably arranged in the limiting groove, and the limiting block 605 slides along the radial direction of the metal ring 601, and a third spring 606 is connected between the limiting block 605 and the limiting groove, and the inner wall of the ring groove 102 is provided with a plurality of clamping grooves 104 around the circumferential direction, and the clamping groove 104 is V-shaped, and the opening of the V-shape faces the metal ring 601; the third spring 606 has a tendency to make the limiting block 605 extend from the limiting groove and enter the clamping groove 104. The limiting block 605 is V-shaped, so that it is easy for the limiting block 605 to withdraw from the clamping groove 104.

[0033] When the stop block 605 rotates with the metal ring 601 to a position between two adjacent slots 104, the third spring 606 contracts; Figure 6 As shown, when the limit block 605 rotates to the end position of the slot 104 along with the metal ring 601, even if the metal ring 601 stops rotating, under the elastic action of the third spring 606, the limit block 605 can still slide along the slot 104 to the middle position of the slot 104, thereby pushing the metal ring 601 to continue to rotate a certain angle.

[0034] Furthermore, the inner wall of the connecting ring 100 is provided with a plurality of first slide grooves 103 and a plurality of second slide grooves 105, both of which extend along the axial direction of the connecting ring 100, and the first driving ring 500 is provided with a plurality of first sliders 503 in the circumferential direction, the first sliders 503 correspond one-to-one to the first slide grooves 103 and the first sliders 503 can slide along the first slide grooves 103, a first spring 501 is provided between the first slider 503 and the first slide groove 103, and the first spring 501 has a tendency to keep the first driving ring 500 away from the first sealing gasket 600; the second driving ring 800 is provided with a plurality of second sliders in the circumferential direction, the second sliders correspond one-to-one to the second slide grooves 105 and the second sliders 503 can slide along the second slide grooves 105, a second spring is provided between the second slider and the second slide groove 105, and the second spring has a tendency to keep the second driving ring 800 away from the second sealing gasket 700. The first spring 501 allows the first drive ring 500 to automatically withdraw from the locking groove 604 of the first sealing gasket 600 when the first tightening ring 400 withdraws from the connecting ring 100. The second spring allows the second drive ring 800 to automatically withdraw from the locking groove 604 of the second sealing gasket 700 when the second tightening ring 900 withdraws from the connecting ring 100.

[0035] like Figures 9 to 11 As shown, the inner circumferences of the first tightening ring 400 and the second tightening ring 900 are uniformly provided with a plurality of rolling adjustment components around the circumferential direction, and the rolling adjustment components include an articulated seat, in which an articulated shaft 432 extending in the horizontal direction is provided, and a push rod 430 is rotatably provided on the articulated shaft 432, and one end of the push rod 430 away from the articulated shaft 432 is press-fitted with the press ring 210, and a screw 431 is fixedly provided on the push rod 430, and the screw 431 is parallel to the push rod 430, and the screw 431 is rotatably connected to the push rod 430. The rotating ring 450 is connected, the screw rod 431 has a spiral groove, and the inner circumference of the rotating ring 450 is provided with a protrusion (not shown in the figure), which can move along the spiral groove. The outer anti-rotation assembly of the rotating ring 450 is equipped with a roller 440. When the push rod 430 is in a horizontal state, the roller 440 and the top pressure ring 210 are in rolling contact; as the roller 440 rotates, the rotating ring 450 is driven to rotate synchronously, so that the protrusion gradually moves to the end of the spiral groove, and then the rotating ring 450 stops rotating, so that the roller 440 and the top pressure ring 210 are in sliding contact. The outer circumference of the rotating ring 450 is slidably connected with the roller 440 through a keyway, and a torsion spring is provided between the push rod 430 and the hinge shaft 432. The torsion spring keeps the push rod 430 in a nearly vertical state, and the hinge seat limits the maximum rotation of the push rod 430 to the horizontal state.

[0036] As the first tightening ring 400 and the second tightening ring 900 are tightened, the push rod 430 gradually approaches the top pressure ring 210. Under the action of the top pressure ring 210, the push rod 430 gradually becomes horizontal, so that the roller 440 can roll in contact with the top pressure ring 210. As the first tightening ring 400 and the second tightening ring 900 continue to rotate, the roller 440 rolls in contact with the top pressure ring 210 and rotates around the circumferential direction of the top pressure ring 210. The roller 440 uniformly squeezes the top pressure ring 210 in the circumferential direction, so that the wavy sealing surface formed between the top pressure ring 210 and the rubber ring 602 is more uniform.

[0037] The rotation of the roller 440 drives the rotating ring 450 to rotate synchronously, so that the protrusion of the rotating ring 450 moves along the spiral groove of the screw 431 and gradually moves to the end of the spiral groove, and then the rotating ring 450 stops rotating, and the roller 440 and the top pressure ring 210 become in sliding contact, so that the rotation resistance of the first tightening ring 400 and the second tightening ring 900 increases instantly, which can remind medical staff that they have been tightened in place and do not need to continue to tighten. At the same time, by adjusting the number of spiral turns of the spiral groove, the number of rolling turns of the roller 440 on the top pressure ring 210 can be controlled, so that the pressing force between the top pressure ring 210 and the rubber ring 602 is maintained within an appropriate range, avoiding excessive pressing force of the top pressure ring 210 on the rubber ring 602, causing damage to the rubber ring 602, or too little pressing force, resulting in poor sealing.

[0038] Furthermore, a telescopic groove 411 is provided between two adjacent rolling adjustment components of the first tightening ring 400 and the second tightening ring 900, and a telescopic block 420 is slidably provided in the telescopic groove 411, and the telescopic block 420 extends along the axial direction of the connecting ring 100. A fourth spring is provided between the telescopic block 420 and the telescopic groove 411, and the fourth spring has a tendency to make the telescopic block 420 extend from the telescopic groove 411; the telescopic block 420 on the first tightening ring 400 is used to push the first driving ring 500, and the telescopic block 420 of the second tightening ring 900 is used to push the second driving ring 800. In the initial state, the telescopic block 420 extends from the telescopic groove 411 to form a support function to prevent the push rod 430 from contacting the top pressure ring 210. As the first tightening ring 400 and the second tightening ring 900 are gradually tightened, the telescopic block 420 gradually retracts into the telescopic groove 411, so that the push rod 430 gradually contacts the rubber ring 602 of the first sealing gasket 600 or the second sealing gasket 700. The elastic coefficient of the fourth spring is greater than the elastic coefficient of the first spring 501 and the second spring, so that the telescopic block 420 is retracted into the telescopic groove 411 only after the first driving ring 500 moves.

[0039] Furthermore, a partition plate 101 is provided in the middle of the connecting ring 100, and the partition plate 101 is located between the two annular grooves 102; the partition plate 101 is engaged with the first sealing gasket 600 and the second sealing gasket 700 on the side away from the rubber ring 602. The first sealing gasket 600 and the second sealing gasket 700 are positioned and installed by the partition plate 101 and the annular groove 102.

[0040] In combination with the above embodiments, the use principle and working process of the embodiments of the present invention are as follows: The first sealing gasket 600 and the second sealing gasket 700 are installed in the annular groove 102 of the connecting ring 100, and then the first housing 200 and the second housing 300 are docked in the connecting ring 100, and the first tightening ring 400 is inserted between the first housing 200 and the connecting ring 100, and the second tightening ring 900 is inserted between the second housing 300 and the connecting ring 100. Then the first tightening ring 400 and the second tightening ring 900 are rotated respectively, and the rotation of the first tightening ring 400 can push the first housing 200 to move downward, so that the top pressure ring 210 of the first housing 200 squeezes the first sealing gasket 600, and the rotation of the second tightening ring 900 can push the second housing 300 to move upward, so that the top pressure ring 210 of the second housing 300 squeezes the second sealing gasket 700 upward.

[0041] Since the process of the first tightening ring 400 compressing the first sealing gasket 600 is the same as the process of the second tightening ring 900 compressing the second sealing gasket 700, the following only takes the first tightening ring 400 compressing the first sealing gasket 600 as an example for description.

[0042] The rotation and downward movement of the first tightening ring 400 drives the telescopic block 420 to contact the first driving ring 500, so that the first driving ring 500 overcomes the force of the third spring 606 and moves downward, and the pressing block 502 on the first driving ring 500 cooperates with the wedge block 603 on the first sealing gasket 600, thereby driving the first sealing gasket 600 to rotate around the annular groove 102 of the connecting ring 100, so that the limiting block 605 on the first sealing gasket 600 passes through the card groove 104 of the annular groove 102 in sequence, and as the first tightening ring 400 is further tightened, the telescopic block 420 compresses the fourth spring, so that the telescopic block 420 gradually shrinks into the telescopic groove 411, and the push rod 430 gradually contacts the top pressure ring 210. In the initial state, the push rod 430 is close to a vertical state; under the action of the push ring 210, the push rod 430 gradually rotates to a horizontal state, so that the roller 440 can roll in contact with the push ring 210. As the first tightening ring 400 continues to rotate, the roller 440 rolls in contact with the push ring 210 and rotates around the circumferential direction of the push ring 210. The roller 440 uniformly squeezes the push ring 210 in the circumferential direction, so that the push ring 210 and the rubber ring 602 of the first sealing gasket 600 are evenly pressurized.

[0043] When the pressing block 502 slides into the locking groove 604, the first driving ring 500 moves down to the limit position, the first sealing gasket 600 stops rotating, and the limit block 605 is located at the end position of a certain slot 104. In the initial state, the protrusion of the rotating ring 450 is located at one end of the spiral groove. The rotation of the roller 440 drives the rotating ring 450 to rotate synchronously, so that the protrusion of the rotating ring 450 moves along the spiral groove of the screw 431. When the protrusion moves to the other end of the spiral groove, the rotating ring 450 will stop rotating. Since the rotating ring 450 and the roller 440 are in anti-rotation cooperation, the roller 440 also stops rotating. The roller 440 and the top pressure ring 210 become in sliding contact, so that the rotation resistance of the first tightening ring 400 and the second tightening ring 900 increases instantly. At this time, the medical staff can stop screwing the first tightening ring 400.

[0044] When the first housing 200 and the second housing 300 need to be disassembled, the first tightening ring 400 and the second tightening ring 900 are rotated in opposite directions. The following description will be made by taking the removal of the first housing 200 from the connecting ring 100 as an example.

[0045] The first tightening ring 400 is rotated in the reverse direction. As the first tightening ring 400 continues to rotate in the reverse direction, the first tightening ring 400 gradually separates from the top pressure ring 210 of the first shell 200, so that the telescopic block 420 on the first tightening ring 400 gradually extends from the telescopic groove 411 under the action of the fourth spring, promoting the first tightening ring 400 to separate from the connecting ring 100, and the roller 440 is no longer in contact with the top pressure ring 210, so that the push rod 430 becomes close to the vertical state again. At the same time, the first drive ring 500 is no longer subjected to the extrusion force, so that the first drive ring 500 is reset under the action of the first spring 501, and the pressing block 502 on the first drive ring 500 is disengaged from the locking groove 604 of the first sealing gasket 600. Since the limit block 605 on the first sealing gasket 600 is located at the end position of a certain slot 104, under the action of the third spring 606, the limit block 605 can rotate along the inner wall of the slot 104 to the middle position of the slot 104, thereby continuing to drive the first sealing gasket 600 to rotate a certain angle in the same direction, which is convenient for the removal of the first sealing gasket 600. Finally, the first tightening ring 400 is withdrawn from between the first housing 200 and the connecting ring 100, and the first housing 200 is removed from the connecting ring 100.

[0046] like Figure 1 and Fig.13As shown, an accessory of a nephrology hemodialysis device 1000 provided in one embodiment of the present invention is used to connect the above-mentioned nephrology hemodialysis device 1000, including a blood pipeline 1001, a dialysate pipeline 1003 and a waste liquid pipeline 1002. The blood pipeline 1001 draws out the blood of the human body and sends it into the first shell 200 and the second shell 300 for filtration and then returns it to the human body; the dialysate pipeline 1003 is used to transport the dialysate to the inside of the first shell 200 and the second shell 300, and the waste liquid pipeline 1002 is used to draw out the waste liquid generated after filtration from the first shell 200 and the second shell 300.

[0047] There are two blood lines 1001, one of which is introduced from the human blood vessel into the blood inlet 202 of the upper end cover 201 of the first shell 200, and the other is led out from the blood outlet 302 of the lower end cover 301 of the second shell 300 to the human blood vessel. The dialysate line 1003 connects the dialysate container with the dialysate inlet 303 on the second shell 300, and the waste liquid line 1002 connects the waste liquid outlet 203 on the first shell 200 with the waste liquid collection device. The accessories of the nephrology hemodialysis device 1000 also include structures such as a blood pump, which belong to the prior art and will not be repeated here.

[0048] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A hemodialysis device for nephrology, characterized in that: It comprises a first shell and a second shell that are coaxially connected, the first shell is located above the second shell, the first shell and the second shell are symmetrically arranged and have the same structure, and the end faces of the first shell and the second shell opposite to each other are both provided with a top pressure ring, and the top pressure ring has a wavy end face; the first shell and the second shell are jointly sleeved with a connecting ring on the outside, the inner wall of the connecting ring is coaxially rotated with a first sealing gasket and a second sealing gasket, the first sealing gasket and the second sealing gasket are located between the first shell and the second shell, and the first sealing gasket and the second sealing gasket are symmetrically arranged and have the same structure; A first tightening ring is rotatably provided between the first shell and the connecting ring, and a second tightening ring is rotatably provided between the second shell and the connecting ring. The first tightening ring and the second tightening ring are symmetrically arranged and have the same structure. The rotation of the first tightening ring can push the first shell to move downward, so that the top pressure ring of the first shell squeezes the first sealing gasket. The rotation of the second tightening ring can push the second shell to move upward, so that the top pressure ring of the second shell squeezes the second sealing gasket upward, thereby forming a wavy sealing surface for both the first sealing gasket and the second sealing gasket.

2. The nephrology hemodialysis device according to claim 1, characterized in that: A first driving ring and a second driving ring are also slidably provided inside the connecting ring. The first driving ring and the second driving ring are symmetrically arranged and have the same structure. The first tightening ring is located above the first driving ring, and the second tightening ring is located below the second driving ring. The downward movement of the first tightening ring can push the first driving ring to move downward, and the upward movement of the second tightening ring can push the second driving ring to move upward. The first sealing gasket and the second sealing gasket both include a metal ring, and a plurality of wedge blocks are arranged at intervals in the circumferential direction of the metal ring. A plurality of pressing blocks are arranged in the circumferential direction of the first driving ring and the second driving ring, and the pressing blocks extend in the up-down direction, and the pressing blocks correspond to the wedge blocks one by one. The pressing blocks cooperate with the wedge blocks to drive the first sealing gasket or the second sealing gasket to rotate, and then the downward movement of the first driving ring can drive the first sealing gasket to rotate around the axis of the first shell, and the upward movement of the second driving ring can drive the second sealing gasket to rotate around the axis of the second shell.

3. The nephrology hemodialysis device according to claim 2, characterized in that: A rubber ring is coaxially fixed on the metal ring. The outer diameter of the rubber ring is smaller than that of the metal ring. The rubber ring is located on the side of the metal ring facing the first shell or the second shell. The rubber ring is pressed together with the top pressure ring to form the wavy sealing surface.

4. The nephrology hemodialysis device according to claim 3, characterized in that: The inner wall of the connecting ring is provided with two upper and lower ring grooves, and two metal rings are rotatably arranged in the corresponding ring grooves respectively. The outer peripheral surface of the metal ring is provided with a plurality of limit grooves, and a limit block is slidably arranged in the limit groove. The limit block slides along the radial direction of the metal ring. A third spring is connected between the limit block and the limit groove, and the inner wall of the ring groove is provided with a plurality of clamping grooves. The third spring has a tendency to make the limit block extend from the limit groove and enter the clamping groove.

5. The nephrology hemodialysis device according to claim 4, characterized in that: The limiting block and the slot are both V-shaped.

6. The nephrology hemodialysis device according to claim 2, characterized in that: The inner wall of the connecting ring is provided with a plurality of first sliding grooves and a plurality of second sliding grooves, both of which extend along the axial direction of the connecting ring; a plurality of first sliding blocks are provided in the circumferential direction of the first driving ring, the first sliding blocks correspond one-to-one to the first sliding grooves and the first sliding blocks can slide along the first sliding grooves, a first spring is provided between the first sliding blocks and the first sliding grooves, and the first spring has a tendency to keep the first driving ring away from the first sealing gasket; a plurality of second sliding blocks are provided in the circumferential direction of the second driving ring, the second sliding blocks correspond one-to-one to the second sliding grooves and the second sliding grooves can slide along the second sliding grooves, a second spring is provided between the second sliding blocks and the second sliding grooves, and the second spring has a tendency to keep the second driving ring away from the second sealing gasket.

7. The nephrology hemodialysis device according to claim 6, characterized in that: The inner circumferences of the first tightening ring and the second tightening ring are both provided with multiple rolling adjustment components, and the rolling adjustment components include an articulated seat, in which an articulated shaft extending in a horizontal direction is provided, a push rod is rotatably provided on the articulated shaft, and one end of the push rod away from the articulated shaft is pressed and matched with a pressure ring, a screw is fixedly provided on the push rod, the screw is parallel to the push rod, and a rotating ring is rotatably connected to the screw, the screw has a spiral groove, and a protrusion is provided on the inner circumference of the rotating ring, the protrusion can move along the spiral groove, and a roller is mounted on the outer anti-rotation of the rotating ring, and when the push rod is in a horizontal state, the roller can roll in contact with the pressure ring; when the roller rotates and drives the rotating ring to rotate synchronously, and when the protrusion moves to the end of the spiral groove, the rotating ring stops rotating, so that the roller and the pressure ring are in sliding contact.

8. The nephrology hemodialysis device according to claim 7, characterized in that: A telescopic groove is further provided between two adjacent rolling adjustment components of the first tightening ring and the second tightening ring, a telescopic block is slidably provided in the telescopic groove, the telescopic block extends along the axial direction of the connecting ring, a fourth spring is provided between the telescopic block and the telescopic groove, and the fourth spring has a tendency to make the telescopic block extend from the telescopic groove; The telescopic block on the first tightening ring is used to push the first driving ring, and the telescopic block on the second tightening ring is used to push the second driving ring.

9. The nephrology hemodialysis device according to claim 5, characterized in that: A partition is provided in the middle of the connecting ring, and the partition is located between the two ring grooves; the partition is matched with the first sealing gasket and the second sealing gasket on one side away from the rubber ring.

10. An accessory for a nephrology hemodialysis device, used for connecting to the nephrology hemodialysis device according to any one of claims 1 to 9, characterized in that: It includes a blood pipeline, a dialysate pipeline and a waste liquid pipeline. The blood pipeline draws out the human body's blood and sends it into the first shell and the second shell for filtration and then returns it to the human body; the dialysate pipeline is used to transport the dialysate to the inside of the first shell and the second shell, and the waste liquid pipeline is used to draw out the waste liquid generated after filtration from the first shell and the second shell.

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