Pipeline pressure regulating device and extracorporeal circulation system

Abstract

The utility model relates to the technical field of medical instruments, and discloses a pipeline pressure regulating device and an extracorporeal circulation system.The pipeline pressure regulating device comprises a fixing piece and two pressing blocks, a guide rod is fixedly arranged on one pressing block, a first through hole matched with the guide rod in size is formed in the other pressing block, a second through hole is formed in the fixing piece, and the guide rod is fixedly arranged on the second through hole. After the guide rod penetrates through the first through hole, the part, extending out of the first through hole, of the guide rod is in threaded connection with the second through hole. In actual application, a pipeline to be subjected to pressure regulation is firstly placed between the two pressing blocks, the fixing piece 4 is rotated to enable the two pressing blocks to move in the opposite directions or in the opposite directions, the pipeline to be subjected to pressure regulation is pressed or loosened, and therefore the pressure at the front end of an inlet pipe is adjusted, and the flow speed of liquid in the pipeline to be subjected to pressure regulation is increased; the pipeline pressure is adjusted on the premise that the flow is not obviously changed, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially, relate to a pipeline pressure regulating device and extracorporeal circulation system. BACKGROUND

[0002] In the medical instrument industry, it is often necessary to adjust the pipeline pressure and flow rate, for example, when the pressure in the pipeline of the extracorporeal circulation system is low and the blood flow rate is slow, it may cause adverse consequences such as blood clotting, so in some cases, the pipeline pressure needs to be increased to allow the blood to circulate quickly.

[0003] However, when the peristaltic pump in the extracorporeal circulation system operates at a set speed, the pipeline flow rate and flow rate are basically constant, and if the pipeline pressure after the peristaltic pump needs to be increased, the speed of the peristaltic pump must be increased, and at the same time, the pipeline pressure, flow rate and flow rate will also increase; However, the main work of the extracorporeal circulation system is to draw blood from the human body, circulate and process it in the device, and then return it to the human body, and the amount of blood in the human body is basically constant, so the amount of blood drawn from the human body should also be controlled within a certain range, so that the extracorporeal circulation system does not affect the normal physiological functions of the human body, therefore the speed of the peristaltic pump cannot be adjusted at will.

[0004] At present, the inventor has found in practice that there is a lack of very practical tools for adjusting the pressure of the pipeline, and it is difficult to adjust the pressure of the pipeline without significantly changing the flow rate, resulting in low work efficiency. UTILITY MODEL CONTENT

[0005] The utility model discloses a pipeline pressure regulating device and extracorporeal circulation system, solve the technical problem of low work efficiency of adjusting pipeline pressure.

[0006] The utility model discloses a pipeline pressure regulating device in the first aspect provides, include: fixed part and two pressure blocks,

[0007] One of the pressure blocks is fixedly provided with a guide rod, and the other pressure block is provided with a first through hole matched with the size of the guide rod;

[0008] A second through hole is formed in the fixed part;

[0009] After the guide rod passes through the first through hole, the part of the guide rod protruding out of the first through hole is threadedly connected with the second through hole, and the two pressure blocks are used for placing the pipeline to be adjusted.

[0010] Optionally, one of the pressure blocks is provided with a pressing groove, and the other pressure block is provided with a pressing convex part matched with the shape of the pressing groove;

[0011] The bottom surface of the pressing groove is a smooth curved surface;

[0012] The groove bottom surface of the pressing groove faces the convex surface of the pressing convex part, and the pressing groove and the pressing convex part are used for placing the pipeline to be regulated.

[0013] Optionally, the groove bottom surface of the pressing groove is a partial cylindrical surface.

[0014] Optionally, a pipeline groove is further formed in the pressing block provided with the pressing groove.

[0015] The groove bottom surface of the pipeline groove is a partial cylindrical surface.

[0016] The length direction of the pipeline groove is different from the length direction of the pressing groove, and the extension direction of the groove bottom to the groove top of the pipeline groove and the pressing groove is the same.

[0017] The pipeline groove is used for placing the pipeline to be regulated.

[0018] Optionally, the length direction of the pipeline groove is perpendicular to the length direction of the pressing groove.

[0019] Optionally, an elastic member is arranged between the two pressing blocks.

[0020] Optionally, the elastic member is a spring sleeved on the guide rod.

[0021] Optionally, a guide structure is arranged on the pressing block.

[0022] The guide structures of the two pressing blocks are matched with each other.

[0023] Optionally, the fixing member is a quick release nut.

[0024] The second aspect of the utility model provides a kind of extracorporeal circulation system, including the pipeline pressure regulating device of any one of the above.

[0025] From the above technical solution, the utility model has the following advantages:

[0026] The utility model provides a kind of pipeline pressure regulating device and extracorporeal circulation system, wherein the pipeline pressure regulating device includes fixing member and two pressing blocks, one of which is fixedly provided with guide rod, the other pressing block is provided with the first through hole of the size matched with guide rod, the second through hole is formed in fixing member, after guide rod passes through first through hole, the part of guide rod that extends outside first through hole is connected with second through hole by screw thread.In actual application, first, the pipeline to be regulated is placed between two pressing blocks, and rotating fixing member 4 can make two pressing blocks move towards each other or move away from each other, and the pipeline to be regulated is pressed or relaxed, so as to adjust the pressure at the front end of pipe, accelerate the liquid flow rate in the pipeline to be regulated, realize the regulation of pipeline pressure under the premise of not significantly changing flow, and improve work efficiency.

[0027] In addition, the two pressing blocks act on the outer wall of the pipeline, and are a non-contact liquid pressure regulating mode, so that the liquid in the pipeline can be prevented from being polluted; the two pressing blocks are separately detachable components and are convenient to install, so that the pipeline pressure regulating device can be added to any position of the circulating pipeline of any extracorporeal circulation system, and can respond to changes in use requirements in time; furthermore, the pipeline of the extracorporeal circulation system is usually used only once, and after the pipeline pressure regulating device is detached from the pipeline, the pipeline pressure regulating device can be recycled, thereby reducing the cost of consumables; if the pipeline pressure regulating device is installed on the pipeline after the peristaltic pump in the extracorporeal circulation system, the pressure and flow rate in the pipeline after the peristaltic pump can be regulated, the coagulation condition in the pipeline can be avoided, and the safety risk is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0029] Figure 1 A structure schematic view of a pipeline pressure regulating device before installation is provided for the embodiment of the present application.

[0030] Figure 2 A structure schematic view of a pipeline pressure regulating device after installation is provided for the embodiment of the present application.

[0031] Figure 3 A schematic view of the pipeline pressure regulating device for increasing the pressure of the pipeline is provided for the embodiment of the present application.

[0032] Figure 4 A schematic view of the pipeline pressure regulating device for decreasing the pressure of the pipeline is provided for the embodiment of the present application.

[0033] The drawings are identified as follows: 1-first pressing block; 11-pressing groove; 12-pipeline groove; 13-sliding block; 2-second pressing block; 21-pressing convex part; 22-first through hole; 23-sliding rail; 3-guide rod; 4-fixing part; 41-second through hole; 5-spring; 6-pipeline to be regulated. DETAILED DESCRIPTION

[0034] The embodiment of the present application discloses a pipeline pressure regulating device and an extracorporeal circulation system, and is used to solve the technical problem of low work efficiency of regulating the pressure of the pipeline.

[0035] The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] Please refer to Figures 1 to 4 The utility model discloses a kind of pipeline pressure regulating devices, comprising: fixed piece 4 and two pressing blocks;

[0039] One of the pressing blocks is fixedly provided with a guide rod 3, and the other pressing block is provided with a first through hole 22 matching the size of the guide rod 3;

[0040] The fixed piece 4 is provided with a second through hole 41;

[0041] After the guide rod 3 passes through the first through hole 22, the part of the guide rod 3 extending out of the first through hole 22 is threadedly connected with the second through hole 41, and the two pressing blocks are used to place the pipeline to be regulated 6.

[0042] It can be understood that the fixed piece 4 is used to limit the maximum distance that the two pressing blocks can reach after moving away from each other, and is preferably a quick-release nut; the guide rod 3 can slide in the first through hole 22 along the length direction of itself; the side surface of the guide rod 3 is provided with external threads on at least the part extending out of the first through hole 22, and the hole wall of the second through hole 41 is provided with internal threads matching the external threads of the guide rod 3.

[0043] In practical application, first, the pipeline to be regulated 6 is placed between the two pressing blocks, as shown in Figure 1 and 2 , the pressing block provided with the guide rod 3 is the first pressing block 1, and the pressing block provided with the first through hole 22 is the second pressing block 2; as shown in Figure 3 , the liquid in the pipeline to be regulated 6 flows in from the upper right, at this time, if it is needed to increase the pressure of the pipeline before the pipeline regulating device (the inflow side of the pipeline) to increase the flow rate of the liquid in the pipeline 6, the fixed part 4 can be rotated to reduce the distance between the fixed part 4 and the first pressing block 1, after the fixed part 4 moves to contact the second pressing block 2, the fixed part 4 is continuously rotated to make the fixed part 4 push the second pressing block 2 to slide on the guide rod 3, so that the first pressing block 1 and the second pressing block 2 move towards each other, thereby pressing the pipeline 6, thereby increasing the pressure at the front end of the pipeline and accelerating the flow rate of the liquid; as shown in Figure 4 , the liquid in the pipeline to be regulated 6 flows in from the upper right, at this time, if the pressure of the pipeline before the pipeline regulating device (the inflow side of the pipeline) is too large, and it is needed to reduce the pipeline pressure and the flow rate of the liquid, the fixed part 4 can be rotated in the opposite direction to increase the distance between the fixed part 4 and the first pressing block 1, under the action of the pipeline pressure, the first pressing block 1 and the second pressing block 2 move away from each other, thereby reducing the pressure at the front end of the pipeline; during the entire pressure regulation process, the flow rate in the pipeline can be basically unchanged, thereby realizing the regulation of the pipeline pressure without significantly changing the flow rate, and improving the work efficiency. It should be noted that the rotation direction of the fixed part 4 when increasing the pipeline pressure or reducing the pipeline pressure depends on the direction of the internal thread of the second through hole 41 and the external thread on the guide rod 3, and those skilled in the art can set it according to the use habit.

[0044] In addition, the first pressing block 1 and the second pressing block 2 act on the outer wall of the pipeline, which is a non-contact liquid pressure regulation mode, and can avoid contamination of the liquid in the pipeline 6; the first pressing block 1 and the second pressing block 2 are two separately separable components and are easy to install, so the pipeline regulating device provided by the embodiment can be added to any position of the circulating pipeline of any extracorporeal circulation system, and can respond to changes in use requirements in real time; furthermore, the pipeline of the extracorporeal circulation system is usually used only once, and after the pipeline regulating device is detached from the pipeline, it can be recycled, thereby reducing the cost of consumables; in a specific application scenario, the pipeline regulating device provided by the embodiment is installed on the pipeline after the peristaltic pump in the extracorporeal circulation system, and the pressure and flow rate in the pipeline after the peristaltic pump can be regulated, thereby avoiding the occurrence of coagulation in the pipeline and reducing the safety risk.

[0045] Referring to Figure 2 , in a specific embodiment, the pressing surface of the two pressing blocks for pressing the pipeline can be a plane, and in some more preferred embodiments, it can also be a matching curved surface structure, which can increase the fitting degree of the pressing surface and the pipeline; as shown in Figure 1As shown, the first pressing block 1 is provided with a pressing groove 11, and the second pressing block 2 is provided with a pressing convex part 21 matched with the pressing groove 11 in shape. The groove bottom surface of the pressing groove 11 is a smooth curved surface, and the groove bottom surface of the pressing groove 11 faces the convex surface of the pressing convex part 21. The pressing groove 11 and the pressing convex part 21 are used for placing the pipeline 6 to be adjusted. The smooth curved surface and the convex surface can be matched after being contacted. In actual implementation, the curvature of the curved surface can be adjusted or the positions of the curved surface and the concave surface on the two pressing blocks can be replaced according to requirements.

[0046] In another specific embodiment, the groove bottom surface of the pressing groove 11 can be further provided as a partial cylindrical surface.

[0047] It should be noted that the cylindrical surface is a curved surface formed by parallel movement of a straight line (generatrix) along a curved line (directrix or guide line). The partial cylindrical surface refers to a curved surface obtained by cutting the cylindrical surface along a plane in which two generatrices are located. In this embodiment, the groove bottom surface of the pressing groove 11 is also a smooth curved surface. Therefore, the groove bottom surface of the pressing groove 11 can be a partial cylindrical concave surface, a partial elliptical cylindrical concave surface, etc. The length direction of the guide rod 3 is the same as the extension direction from the groove top to the groove bottom of the pressing groove 11 (i.e., the depth direction of the pressing groove 11).

[0048] When the groove bottom surface of the pressing groove 11 is a partial cylindrical surface, the pipeline 6 to be adjusted can be placed along the length direction of the pressing groove 11. The two pressing blocks can better transmit the pressure to the pipeline 6 to be adjusted along the axial direction of the pipeline 6. However, when placed in this way, the edge of the pressing convex part 21 is easy to cause stress concentration phenomenon at the place contacting the outer wall of the pipeline 6, and further easy to cause abrasion to the outer wall of the pipeline 6. Therefore, in a more preferred embodiment of the above embodiment, the pressing block provided with the pressing groove 11 can be further provided with a pipeline groove 12. The groove bottom surface of the pipeline groove 12 is a partial cylindrical surface. The length direction of the pipeline groove 12 is different from the length direction of the pressing groove 11. The extension direction from the groove bottom to the groove top of the pipeline groove 12 is the same as the extension direction from the groove bottom to the groove top of the pressing groove 11. That is, the pipeline groove 12 intersects with the pressing groove 11. At this time, the pressing groove 11 and the pressing convex part 21 can form matching concave surface and convex surface only on the part passing through the pipeline groove 12. The pipeline 6 to be adjusted is placed in the pipeline groove 12 before pressure adjustment. The edge of the pressing convex part 21 does not contact the outer wall of the pipeline 6, reducing the abrasion to the outer wall of the pipeline 6. Further, the length direction of the pipeline groove 12 can be perpendicular to the length direction of the pressing groove 11, so that the pressure received by the pipeline 6 to be adjusted is more balanced. In addition, the edge at the intersection of the pipeline groove 12 and the pressing groove 11 can be chamfered, or the groove bottom of the pipeline groove 12 and the groove bottom of the pressing groove 11 can be arranged on the same spatial plane. That is, the deepest position of the pipeline groove 12 along the extension direction from the groove top to the groove bottom is on the same spatial plane as the deepest position of the pressing groove 11 along the extension direction from the groove top to the groove bottom.

[0049] In a preferred embodiment, an elastic member is arranged between the two pressure blocks, which can increase the damping feeling of the user when adjusting the pipeline pressure, and provide clear operation feedback; and the person skilled in the art can avoid the misoperation of making the two pressure blocks excessively close to the pipeline 6 to be adjusted to be completely flattened by reasonably setting the minimum compression length of the elastic member; more preferably, the elastic member can be a spring 5 sleeved on the part of the guide rod 3 not penetrating into the first through hole 22.

[0050] In a preferred embodiment, the pressure block is further provided with a guide structure, and the guide structure of the first pressure block 1 and the guide structure of the second pressure block 2 are matched with each other, so as to avoid the rotation of the second pressure block 2 when the rotating fixing member 4 is rotated, so as to make the second pressure block 2 dislocated with the first pressure block 1, and affect the stability of the two clamping blocks on the pipeline 6 to be adjusted; the guide structure on the two pressure blocks can be as shown in the figure, wherein one of the pressure blocks is provided with a sliding rail 23, and the other pressure block is provided with a sliding block 13 matched with the sliding rail; the guide structure on the two pressure blocks can also be other guide structure combinations such as double gear and rack. Figure 1

[0051] The utility model embodiment two provides a kind of extracorporeal circulation system, including the pipeline pressure regulating device as any one of the above.

[0052] The extracorporeal circulation system works is to draw blood from human body to device and circulate processing, then backflow to human body, and its component parts mainly include pipeline, pump, blood processing device, valve etc.; in actual application, the pipeline pressure regulating device is installed on the pipeline after peristaltic pump in extracorporeal circulation system, can adjust the pressure and flow rate of pipeline after peristaltic pump, avoid the coagulation condition in pipeline after peristaltic pump, reduce security risk.

[0053] The above has carried out detailed introduction to the pipeline pressure regulating device and extracorporeal circulation system provided by the utility model, for the general technical personnel of this field, according to the thought of the utility model embodiment, there will be change in specific implementation and application range, and above all, the content of the specification should not be understood as the limitation of the utility model.​

Claims

1. A line pressure regulating device characterized by comprising: The utility model relates to a pipeline pressure regulating device, including: A fixing piece and two pressing blocks; One of the pressing blocks is fixedly provided with a guide rod, and the other pressing block is provided with a first through hole matched with the size of the guide rod; The fixing piece is provided with a second through hole; After the guide rod passes through the first through hole, the part of the guide rod extending out of the first through hole is screwed with the second through hole, and the two pressing blocks are used for placing a pipeline to be regulated.

2. The line pressure regulating device according to claim 1, characterized by One of the pressing blocks is provided with a pressing groove, and the other pressing block is provided with a pressing convex part matched with the shape of the pressing groove; The groove bottom surface of the pressing groove is a smooth curved surface; The groove bottom surface of the pressing groove faces the convex surface of the pressing convex part, and the pressing groove and the pressing convex part are used for placing the pipeline to be regulated.

3. The line pressure regulating device according to claim 2, characterized by The groove bottom surface of the pressing groove is a partial cylindrical surface.

4. The line pressure regulating device according to claim 3, characterized by The pressing block provided with the pressing groove is further provided with a pipeline groove; The groove bottom surface of the pipeline groove is a partial cylindrical surface; The length direction of the pipeline groove is different from the length direction of the pressing groove, and the extension direction of the groove bottom to the groove top of the pipeline groove and the pressing groove is the same; The pipeline groove is used for placing the pipeline to be regulated.

5. The line pressure regulating device according to claim 4, wherein The length direction of the pipeline groove is perpendicular to the length direction of the pressing groove.

6. The line pressure regulating device of claim 1, wherein The two pressing blocks are provided with an elastic member.

7. The line pressure regulating device according to claim 6, characterized in that The elastic member is a spring sleeved on the guide rod.

8. The line pressure regulating device of claim 1, wherein The pressing block is provided with a guide structure; The guide structures of the two pressing blocks are matched with each other.

9. The line pressure regulating device of claim 1, wherein The fixing piece is a quick-release nut.

10. An extracorporeal circulation system, characterized by, The utility model relates to a pipeline pressure regulating device.

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