Positioning device for dialysis

Abstract

The invention provides a positioning device for dialysis. The positioning device comprises a base plate, a fixing seat, a traction mechanism and a fixing mechanism. When the upper body of the patient rotates leftwards and rightwards, the traction mechanism drives the fixing base to rotate leftwards and rightwards, the fixing base rotates leftwards and rightwards to drive the dialysis tube to deflect towards the rotating direction of the upper body of the patient so as to adjust the fixing angle of the dialysis tube, and therefore the dialysis tube is effectively prevented from being bent; the transmission assembly drives one set of clamping plates to move away from the other set of clamping plates to cancel clamping of the dialysis tube, at the moment, the upper body of the patient rotates to drive the dialysis tube to slide in the through hole so as to adaptively adjust the length of the dialysis tube between the abdomen of the patient and the device, so that the dialysis tube is effectively prevented from being pulled, and rotation of the upper body of the patient is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to a positioning device for dialysis. BACKGROUND

[0002] Peritoneal dialysis is a kind of kidney replacement therapy method which uses human peritoneum as a semi-permeable membrane, realizes the exchange of solutes and water between blood and dialysate by perfusing dialysate into the abdominal cavity, so as to remove metabolic waste in the body and correct water electrolyte and acid-base balance disorder. At present, when peritoneal dialysis is performed, the dialysis tube needs to be fixed.

[0003] The existing positioning device for dialysis is mostly simple in structure, and after fixing the dialysis tube, the fixed angle of the dialysis tube is not convenient to adjust, and the length of the dialysis tube between the patient's abdomen and the device is a fixed value, which leads to the phenomenon that the dialysis tube is bent or pulled when the patient rotates the upper body to move the dialysis tube, so that the dialysis is affected. Therefore, in view of the above technical problems, a positioning device for dialysis is proposed. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a positioning device for dialysis, which can effectively prevent the dialysis tube from being bent or pulled when the patient rotates the upper body to move the dialysis tube, and facilitate the rotation of the patient's upper body.

[0005] A positioning device for dialysis, comprising: a base plate, both ends of which are provided with a fixing belt; a fixing seat rotatably arranged on the outer side of the base plate, the fixing seat is provided with a through hole for the dialysis tube to pass through; a traction mechanism arranged on the base plate and connected with the fixing seat and the left and right waist of the patient, which can drive the fixing seat to rotate left and right or reset when the patient's upper body rotates left and right or resets; and a fixing mechanism comprising a clamping plate and a transmission assembly, one end of the fixing seat is provided with a fixing groove in communication with the through hole, two groups of clamping plates for clamping the dialysis tube are slidably arranged in the fixing groove, the transmission assembly is arranged on the fixing seat and connected with the base plate and the two groups of clamping plates, which can drive one group of clamping plates to move away from the other group of clamping plates or reset when the fixing seat rotates left and right or resets.

[0006] The above-mentioned positioning device for dialysis has the following advantages: When the patient's upper body rotates left and right, the traction mechanism drives the fixed seat to rotate left and right, and the rotation of the fixed seat can drive the dialysis tube to deflect in the direction in which the patient's upper body rotates to adjust the fixed angle of the dialysis tube, thereby effectively avoiding the bending of the dialysis tube, and at the same time that the fixed seat rotates left and right, the transmission assembly drives one of the two sets of clamping plates to move away from the other set of clamping plates to cancel the clamping of the dialysis tube, at this time, the rotation of the patient's upper body can drive the dialysis tube to slide in the through hole to adaptively adjust the length of the dialysis tube between the patient's abdomen and the device, thereby effectively avoiding the dialysis tube from being pulled, and facilitating the rotation of the patient's upper body.

[0007] In one of the embodiments, the traction mechanism comprises a rack and a gear; the rack is slidingly arranged on the base plate, both ends of the rack are provided with traction ropes, and both ends of the two sets of traction ropes are provided with fixed stickers; the gear is coaxially arranged on the fixed seat and located below the rack and engaged with the rack.

[0008] In one of the embodiments, a mounting groove is formed at the top end of the base plate, a guide rod is arranged in the mounting groove, the rack is slidingly arranged in the mounting groove and sleeved on the guide rod, and the gear is engaged with the rack in the mounting groove.

[0009] In one of the embodiments, the traction mechanism further comprises an adjusting assembly, the adjusting assembly comprises a first bidirectional screw rod and a guide block; a guide groove is formed at the top end of the rack, two sets of guide blocks are slidingly arranged in the guide groove, one end of each of the two sets of traction ropes is connected with one of the two sets of guide blocks through the base plate and the rack, and the first bidirectional screw rod is rotatably arranged in the guide groove and has two ends threadedly connected with the two sets of guide blocks.

[0010] In one of the embodiments, the facing away ends of the two sets of clamping plates are respectively provided with two sets of guide shafts, and the two sets of guide shafts are slidingly arranged on the side walls of the fixing groove.

[0011] In one of the embodiments, the transmission assembly comprises an adjusting screw rod, a bevel gear and an arc bevel gear ring; two sets of adjusting screw rods are rotatably arranged on the opposite sides of the fixed seat, the two sets of adjusting screw rods are threadedly connected with the facing away ends of the two sets of clamping plates, the facing away ends of the two sets of adjusting screw rods are coaxially provided with the bevel gears, the base plate is provided with the arc bevel gear ring coaxial with the fixed seat, and the rotation of the fixed seat left and right can respectively make one of the bevel gears engaged with the arc bevel gear ring.

[0012] In one of the embodiments, the fixed seat is further provided with a pipeline resetting mechanism matched with the dialysis tube, and the pipeline resetting mechanism can drive the dialysis tube to reset after the patient's upper body is reset.

[0013] In one embodiment, the pipe reset mechanism includes mounting blocks, friction rollers, coil springs, and a moving assembly; two sets of mounting blocks are slidably disposed in the fixed groove, and the friction rollers are rotatably mounted on both sets of mounting blocks. The coil springs are connected between the friction rollers and the mounting blocks. The dialysis tube is located between the two sets of friction rollers and is in frictional contact with the outer peripheral walls of the two sets of friction rollers. The moving assembly is disposed on the fixed base and connected to the two sets of mounting blocks. The moving assembly can drive the two sets of mounting blocks to move closer or further apart.

[0014] In one embodiment, the sidewall of the fixing groove is provided with a positioning groove, and one end of the two sets of mounting blocks is slidably disposed in the positioning groove.

[0015] In one embodiment, the movable component includes a second bidirectional screw; the second bidirectional screw is rotatably mounted on the fixed base and its two ends are threadedly connected to two sets of mounting blocks, respectively. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a three-dimensional structural diagram of a positioning device for dialysis provided in an embodiment of the present invention; Figure 2 for Figure 1 A front view of another state of a positioning device for dialysis; Figure 3 for Figure 1 An exploded view of a positioning device for dialysis is shown. Figure 4 for Figure 1 An exploded view of the traction mechanism in a positioning device for dialysis is shown. Figure 5 for Figure 1 An exploded view of an adjustment component in a positioning device for dialysis is shown. Figure 6 for Figure 1 An exploded view of the fixing mechanism in a positioning device for dialysis is shown. Figure 7 for Figure 1 An exploded view of the tubing reset mechanism in a positioning device for dialysis is shown.

[0018] Figure label: 1. Dialysis tube; 10, base plate; 101, fixing band; 102, mounting groove; 1021, guide rod; 103, second sealing plate; 20, fixing seat; 201, through hole; 202, fixing groove; 2021, positioning groove; 203, first sealing plate; 30, clamping plate; 301, guide shaft; 302, adjusting screw; 303, bevel gear; 304, arc bevel gear ring; 40, rack; 401, gear; 402, traction rope; 403, fixed patch; 404, first bidirectional screw; 405, guide block; 406, guide groove; 50, mounting block; 501, friction roller; 502, coil spring; 503, second bidirectional screw. DETAILED DESCRIPTION

[0019] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, therefore, only as an example, and cannot limit the protection scope of the present application.

[0020] Please refer to Figures 1 to 3 In an embodiment, a positioning device for dialysis includes a base plate 10, a fixing seat 20, a traction mechanism and a fixing mechanism.

[0021] Wherein, the base plate 10 is provided with a fixing band 101 at both ends, which is convenient for fixing the base plate 10 on the patient's body through the fixing band 101, and it can be understood that the base plate 10 is located below the connection between the dialysis tube 1 and the abdomen; the fixing seat 20 is rotatably arranged on the outside of the base plate 10, and the fixing seat 20 is provided with a through hole 201 for the dialysis tube 1 to pass through; the traction mechanism is arranged on the base plate 10 and connected with the fixing seat 20 and the left and right waist of the patient, which can drive the fixing seat 20 to rotate left and right or reset when the upper body of the patient rotates left and right or resets, and it can be understood that the traction mechanism can also be connected with the left and right ribs of the patient according to actual needs; the fixing mechanism includes a clamping plate 30 and a transmission assembly, one end of the fixing seat 20 is provided with a fixing groove 202 communicating with the through hole 201, two groups of clamping plates 30 clamping the dialysis tube 1 are slidably arranged in the fixing groove 202, and the transmission assembly is arranged on the fixing seat 20 and connected with the base plate 10 and the two groups of clamping plates 30, which can drive one group of clamping plates 30 to move away from the other group of clamping plates 30 or reset when the fixing seat 20 rotates left and right or resets.

[0022] In the above embodiment, when the patient's upper body rotates left and right, the traction mechanism drives the fixed seat 20 to rotate left and right, and the rotation of the fixed seat 20 can drive the dialysis tube 1 to deflect in the direction in which the patient's upper body rotates to adjust the fixed angle of the dialysis tube 1, thereby effectively avoiding the bending of the dialysis tube 1, and at the same time, the transmission assembly drives one set of clamping plates 30 to move away from the other set of clamping plates 30 to cancel the clamping of the dialysis tube 1, at this time, the rotation of the patient's upper body can drive the dialysis tube 1 to slide in the through hole 201 to adaptively adjust the length of the dialysis tube 1 between the patient's abdomen and the device, thereby effectively avoiding the pulling of the dialysis tube 1, and facilitating the rotation of the patient's upper body.

[0023] In the above embodiment, the fixed seat 20 is provided with a first sealing plate 203 capable of sealing the fixed groove 202, and the first sealing plate 203 is detachably connected with the fixed seat 20 through a clamping pin. The first sealing plate 203 can prevent foreign matter from entering the fixed groove 202 and affecting the movement of the clamping plate 30.

[0024] Please refer to Figure 3 In an embodiment, the traction mechanism includes a rack 40 and a gear 401; the rack 40 is slidingly arranged on the base plate 10, and the rack 40 is provided with traction ropes 402 at both ends, and the ends of the two sets of traction ropes 402 are provided with fixed stickers 403; the gear 401 is coaxially arranged on the fixed seat 20 and located below the rack 40 and engaged with the rack 40.

[0025] In the above embodiment, by attaching the fixed stickers 403 to the left and right waist of the patient and straightening the traction ropes 402, when the patient's upper body rotates left and right, the traction rope 402 on the same side of the rotation direction pulls the rack 40 to move left and right, and the left and right movement of the rack 40 engages with the gear 401 to drive the gear 401 to drive the fixed seat 20 to rotate left and right, which is convenient to drive the fixed seat 20 to rotate left and right. When the patient's upper body returns to the original position, the traction rope 402 pulls the rack 40 to return to the original position, so that the fixed seat 20 returns to the original position, and the fixed seat 20 follows the patient's upper body to rotate left and right and return to the original position conveniently. It can be understood that the fixed stickers 403 and the traction ropes 402 are detachably arranged, such as sleeved or bound, which is convenient for replacement when the fixed stickers 403 fail.

[0026] Please refer to Figure 1 , Figure 3 and Figure 4 In an embodiment, the top end of the base plate 10 is provided with a mounting groove 102, the mounting groove 102 is provided with a guide rod 1021, the rack 40 is slidingly arranged in the mounting groove 102 and sleeved on the guide rod 1021, and the gear 401 is engaged with the rack 40 in the mounting groove 102.

[0027] In the above embodiment, the sliding of the rack 40 is guided and limited by the installation slot 102 and the guide rod 1021, which can ensure the stability of the sliding of the rack 40. The rack 40 and the gear 401 are both located in the installation slot 102, and the structure of the rack 40, the gear 401 and the base plate 10 is compact, which reduces the size of the device and is convenient for the patient to wear.

[0028] Based on the above embodiment, further, the top end of the base plate 10 is provided with a second sealing plate 103 capable of sealing the opening of the installation slot 102, and the second sealing plate 103 is detachably connected with the base plate 10 through a clamping pin. The second sealing plate 103 can prevent foreign matter from entering the installation slot 102 and affecting the movement of the rack 40 or the rotation of the gear 401.

[0029] Please refer to Figure 1 , Figure 3 and Figure 5 In an embodiment, the traction mechanism further includes an adjusting assembly, and the adjusting assembly includes a first bidirectional screw rod 404 and a guide block 405. A guide slot 406 is formed at the top end of the rack 40, and two groups of guide blocks 405 are slidably arranged in the guide slot 406. One end of each of the two groups of traction ropes 402 is connected with a guide block 405 through the base plate 10 and the rack 40 at both ends. The first bidirectional screw rod 404 is rotatably arranged in the guide slot 406 and is threadedly connected with the two groups of guide blocks 405 at both ends.

[0030] In the above embodiment, the first bidirectional screw rod 404 is threadedly connected with the two groups of guide blocks 405, so that the two groups of guide blocks 405 can be driven to move relatively close to or away from each other. The relative movement of the two groups of guide blocks 405 can synchronously adjust the length of the two groups of traction ropes 402 extending from the end of the base plate 10, so as to facilitate the use of patients with different body types and improve the practicability of the device.

[0031] Please refer to Figure 3 and Figure 6 In an embodiment, the facing away end of each of the two groups of clamping plates 30 is provided with two groups of guide shafts 301, and the two groups of guide shafts 301 are slidably arranged on the side wall of the fixed slot 202. The stability of the sliding of the two groups of clamping plates 30 is ensured.

[0032] Please refer to Figure 3 and Figure 6 In an embodiment, the transmission assembly includes an adjusting screw rod 302, a bevel gear 303 and an arc bevel gear ring 304. Two groups of adjusting screw rods 302 are rotatably arranged on the side of the fixed seat 20, and the two groups of adjusting screw rods 302 are threadedly connected with the facing away end of the two groups of clamping plates 30, respectively. The facing away end of each of the two groups of adjusting screw rods 302 is coaxially provided with a bevel gear 303. The arc bevel gear ring 304 is arranged on the base plate 10 coaxially with the fixed seat 20. The left and right rotation of the fixed seat 20 can make one of the bevel gears 303 mesh with the arc bevel gear ring 304.

[0033] In the above embodiment, the fixed seat 20 drives the two groups of bevel gears 303 to revolve, and one group of bevel gears 303 is engaged with the arc-shaped bevel gear ring 304. At this time, the bevel gears 303 drive the adjusting screw 302 to rotate, and the adjusting screw 302 is threadedly connected with the clamping plate 30 to drive the clamping plate 30 to move away from the other group of clamping plates 30. At this time, the clamping of the dialysis tube 1 is cancelled. Conversely, the fixed seat 20 is reversed to reset, so that the adjusting screw 302 reversely rotates. At this time, the clamping plate 30 moves close to the other group of clamping plates 30, so as to clamp and fix the dialysis tube 1. At this time, the dialysis tube 1 can slide in the through hole 201, so as to conveniently cancel the clamping of the dialysis tube 1 or clamp the dialysis tube 1 when the fixed seat 20 rotates or resets.

[0034] Please refer to Figure 2 , Figure 6 and Figure 7 . In an embodiment, the fixed seat 20 is further provided with a pipeline resetting mechanism matched with the dialysis tube 1. The pipeline resetting mechanism can drive the dialysis tube 1 to reset after the upper body of the patient is reset.

[0035] In the above embodiment, after the upper body of the patient is reset, the pipeline resetting mechanism drives the dialysis tube 1 to reset, so as to ensure that the dialysis tube 1 between the abdomen of the patient and the device is at a proper length, and avoid that the dialysis tube 1 is accumulated between the abdomen of the patient and the device.

[0036] Please refer to Figure 2 , Figure 6 and Figure 7 . In an embodiment, the pipeline resetting mechanism comprises a mounting block 50, a friction roller 501, a coil spring 502 and a moving assembly. Two groups of mounting blocks 50 are slidably arranged in the fixed groove 202. The friction roller 501 is rotatably sleeved on each of the two groups of mounting blocks 50. The coil spring 502 is connected between the friction roller 501 and the mounting block 50. The dialysis tube 1 is located between the two groups of friction rollers 501 and is frictionally connected with the outer peripheral walls of the two groups of friction rollers 501. The moving assembly is arranged on the fixed seat 20 and is connected with the two groups of mounting blocks 50. The moving assembly can drive the two groups of mounting blocks 50 to relatively move close to or away from each other.

[0037] In the above embodiment, when the length of the dialysis tube 1 between the abdomen of the patient and the device is adjusted to be proper, the two groups of mounting blocks 50 are relatively moved close to each other by the moving assembly, so that the two groups of friction rollers 501 are frictionally connected with the dialysis tube 1. Therefore, when the patient rotates the upper body to drive the dialysis tube 1 to move, the dialysis tube 1 drives the two groups of friction rollers 501 to rotate, and the coil spring 502 is charged. When the upper body of the patient is reset, the reaction force of the coil spring 502 drives the two groups of friction rollers 501 to reversely rotate, so as to reversely move and reset the dialysis tube 1. The dialysis tube 1 is conveniently driven to move and reset.

[0038] Specific to the above embodiment, the fixed groove 202 side wall is provided with a positioning groove 2021, and one end of the two groups of mounting blocks 50 is slidingly arranged in the positioning groove 2021. The stability of the sliding of the two groups of mounting blocks 50 can be ensured.

[0039] Please refer to Figure 7 In an embodiment, the moving assembly includes a second bidirectional screw rod 503; the second bidirectional screw rod 503 is rotatably arranged on the fixed seat 20, and both ends thereof are threadedly connected with the two groups of mounting blocks 50. By rotating the second bidirectional screw rod 503 and threadedly cooperating with the two groups of mounting blocks 50, the two groups of mounting blocks 50 can be driven to relatively approach or move away from each other, and the adjustment is convenient and fast.

[0040] The specific embodiment of the positioning device for dialysis is: When the patient rotates the upper body, the traction rope 402 on the same side of the rotation direction pulls the rack 40 to move left and right, the rack 40 moves left and right and meshes with the gear 401, which can drive the gear 401 to rotate the fixed seat 20 left and right, and the fixed seat 20 rotates left and right to deflect the dialysis tube 1 towards the deflection direction of the patient's upper body to adjust the fixed angle of the dialysis tube 1, thereby effectively avoiding the bending of the dialysis tube 1, and at the same time that the fixed seat 20 rotates left and right, the fixed seat 20 drives the two groups of bevel gears 303 to revolve, and one of the two groups of bevel gears 303 meshes with the arc bevel gear ring 304, at this time, the bevel gear 303 drives the adjusting screw 302 to rotate, and the adjusting screw 302 is threadedly connected with the clamping plate 30 to drive the clamping plate 30 to move away from the other clamping plate 30, at this time, the clamping of the dialysis tube 1 is cancelled, therefore, the rotation of the patient's upper body can drive the dialysis tube 1 to slide in the through hole 201 to adaptively adjust the length of the dialysis tube 1 between the patient's abdomen and the device, thereby effectively avoiding the dialysis tube 1 from being pulled and facilitating the rotation of the patient's upper body.

[0041] On the other hand, when the patient rotates the upper body to drive the dialysis tube 1 to move, the dialysis tube 1 drives the two groups of friction rollers 501 to rotate, and the coil spring 502 stores power, when the patient's upper body is reset, the reaction force of the coil spring 502 drives the two groups of friction rollers 501 to rotate in the opposite direction to make the dialysis tube 1 move in the opposite direction to reset, thereby ensuring that the dialysis tube 1 between the patient's abdomen and the device is at the appropriate length, and avoiding the dialysis tube 1 from accumulating between the patient's abdomen and the device.

[0042] The above embodiments can only illustrate the technical solutions of the present application, but not limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A positioning device for dialysis, characterized in that, The utility model relates to a dialysis tube fixing device, including: A substrate (10) is provided with a fixed band (101) at both ends; A fixed seat (20) is rotatably arranged outside the substrate (10), and a through hole (201) for the dialysis tube (1) to pass through is formed in the periphery of the fixed seat (20); A traction mechanism is arranged on the substrate (10) and is connected to the fixed seat (20) and the left and right waist of the patient, and can drive the fixed seat (20) to rotate left and right or reset when the upper body of the patient rotates left and right or resets; and A fixing mechanism includes a clamping plate (30) and a transmission assembly, one end of the fixed seat (20) is provided with a fixed groove (202) in communication with the through hole (201), and two groups of clamping plates (30) are slidably arranged in the fixed groove (202) to clamp the dialysis tube (1), the transmission assembly is arranged on the fixed seat (20) and is connected to the substrate (10) and the two groups of clamping plates (30), and can drive one group of clamping plates (30) to move away from the other group of clamping plates (30) or reset when the fixed seat (20) rotates left and right or resets.

2. A positioning device for dialysis according to claim 1, characterized in that The traction mechanism includes a rack (40) and a gear (401); the rack (40) is slidably arranged on the substrate (10), both ends of the rack (40) are provided with traction ropes (402), both ends of the two groups of traction ropes (402) are provided with fixed patches (403), and the gear (401) is coaxially arranged on the fixed seat (20) and located below the rack (40) and engaged with the rack (40).

3. A positioning device for dialysis according to claim 2, characterized in that A mounting groove (102) is formed in the top end of the substrate (10), a guide rod (1021) is arranged in the mounting groove (102), the rack (40) is slidably arranged in the mounting groove (102) and sleeved on the guide rod (1021), and the gear (401) is engaged with the rack (40) in the mounting groove (102).

4. The positioning device for dialysis according to claim 2, characterized in that, The traction mechanism further includes an adjusting assembly, the adjusting assembly includes a first bidirectional screw rod (404) and a guide block (405); a guide groove (406) is formed in the top end of the rack (40), two groups of guide blocks (405) are slidably arranged in the guide groove (406), one end of each of the two groups of traction ropes (402) is connected to two groups of guide blocks (405) by penetrating through both ends of the substrate (10) and the rack (40), and the first bidirectional screw rod (404) is rotatably arranged in the guide groove (406) and is threadedly connected to both groups of guide blocks (405) at both ends.

5. The positioning device for dialysis according to claim 1, characterized in that, The ends of the two groups of clamping plates (30) away from each other are provided with two groups of guide shafts (301), and the two groups of guide shafts (301) are slidably arranged on the side wall of the fixed groove (202).

6. The positioning device for dialysis according to claim 1, characterized in that, The transmission assembly comprises an adjusting screw (302), a bevel gear (303) and an arc-shaped bevel gear ring (304); two groups of the adjusting screws (302) are rotatably arranged on the opposite sides of the fixed seat (20), and are respectively threadedly connected to the opposite ends of the two groups of clamping plates (30); the bevel gears (303) are coaxially arranged on the opposite ends of the two groups of adjusting screws (302); the arc-shaped bevel gear ring (304) is coaxially arranged on the base plate (10) and is engaged with one of the bevel gears (303) when the fixed seat (20) rotates.

7. The positioning device for dialysis according to claim 1, characterized in that, The fixed seat (20) is further provided with a pipeline resetting mechanism matched with the dialysis tube (1), which can drive the dialysis tube (1) to reset after the upper body of the patient is reset.

8. A positioning device for dialysis according to claim 7, characterized in that The pipeline resetting mechanism comprises a mounting block (50), a friction roller (501), a coil spring (502) and a moving assembly; the fixed groove (202) is slidably provided with two groups of the mounting blocks (50), the friction rollers (501) are rotatably sleeved on the two groups of mounting blocks (50), the coil springs (502) are connected between the friction rollers (501) and the mounting blocks (50), the dialysis tube (1) is located between the two groups of friction rollers (501) and is frictionally connected with the outer peripheral walls of the two groups of friction rollers (501), the moving assembly is arranged on the fixed seat (20) and is connected with the two groups of mounting blocks (50), and the moving assembly can drive the two groups of mounting blocks (50) to relatively move close to or away from each other.

9. A positioning device for dialysis according to claim 8, characterized in that The fixed groove (202) is provided with a positioning groove (2021) in the side wall, and the two groups of mounting blocks (50) are slidably arranged in the positioning groove (2021).

10. The positioning device for dialysis according to claim 8, characterized in that, The moving assembly comprises a second bidirectional screw (503); the second bidirectional screw (503) is rotatably arranged on the fixed seat (20) and is threadedly connected with the two groups of mounting blocks (50) at the two ends.

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