Pump chamber and pump pipe mounting structure of peristaltic pump

Abstract

The utility model relates to the technical field of peristaltic pumps, in particular to a pump chamber and pump pipe mounting structure of a peristaltic pump. The peristaltic pump chamber comprises a pump cover and a pump chamber seat, a first pipe groove and a second pipe groove which are used for placing pipelines are formed in the pump chamber seat, a first pipeline clamp and a second pipeline clamp are arranged at the first pipe groove and the second pipe groove respectively and connected with elastic elements, and an ejection assembly is arranged at the bottom of the first pipe groove. The pump pipe installation structure comprises a main pump pipe, a first pump pipe connector, a second pump pipe connector and the peristaltic pump chamber, and the first pump pipe connector and the second pump pipe connector are clamped in the first pipe groove and the second pipe groove respectively and clamped and limited by the first pipeline clamp and the second pipeline clamp correspondingly. The pipeline clamp can clamp pipelines with different diameters through the elastic element, compatibility is good, and the application range is wide. And the ejection assembly is matched with the peristaltic pump to rotate, so that the pump pipe can be automatically disassembled and assembled, and the convenience and high efficiency of pipeline installation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of peristaltic pumps, in particular to a peristaltic pump chamber and a pump pipe installation structure. Background Art

[0002] A peristaltic pump is a positive displacement pump that transfers fluid by rotating the roller to make the pump tube peristalsis. It is widely used in the medical industry because the liquid only flows in the pump tube during the delivery process and does not contact other parts of the pump body, which can avoid liquid contamination. It is the core component of the extracorporeal circulation system of the hemodialysis machine, generally composed of three parts: the driver (motor), the pump head (rotor), and the pump chamber. The driver provides power, and the pump head (rotor) and the pump chamber work together as actuators to complete the delivery of the medium.

[0003] In recent years, with the rapid development of medical technology, especially in the field of blood purification, in order to improve the degree of automation of products and reduce the preparation time before medical treatment, the convenience and efficiency of pipeline installation have also become urgent problems to be solved. The Chinese patent with the prior art patent number of 202210756210.8 discloses a peristaltic pump that can automatically disassemble and assemble the pump tube. When installing the pump tube, the pump cover is manually opened, the inlet section of the pump tube is stuck in the inlet slot, and the middle part of the pump tube is placed along the annular groove. At this time, the middle part of the pump tube is higher than the pump wheel, and then the outlet section of the pump tube is stuck in the outlet slot, the pump cover is closed, and the motor assembly drives the pump head to rotate one circle. The guide pin immediately presses the middle part of the pump tube into the annular groove, that is, the pump tube moves to the middle height position of the pump wheel to complete the installation of the pump tube. When removing the pump tube, open the pump cover and pull the inlet fixing part upward for a distance through the traction structure. When the inlet fixing part moves upward, it drives the inlet section of the pump tube to move upward together, so that the part of the pump tube close to the inlet section is higher than the guide pin. Then start the motor assembly, and the motor assembly drives the pump head to rotate one circle. The guide pin then squeezes out the middle part of the pump tube. Finally, manually take out the inlet and outlet of the pump tube.

[0004] In this scheme, the inlet slot on the inlet fixing part is used to fix the length of the pump tube (a tube that is too long is prone to pile up and get stuck, and a tube that is too short cannot be installed). On the other hand, it can be connected to the pump chamber to specify the pump tube to prevent the pump tube from falling out during automatic installation of the tube. However, the size of the inlet slot is fixed, which can only be used for a specific machine and is not compatible with other types of pump tubes, so the scope of application is limited.

[0005] Therefore it is necessary to improve the above structure. Utility Model Content

[0006] In order to solve the problem in the prior art that the inlet slot size of the peristaltic pump is fixed and the applicable range of pump tubes is limited, the utility model provides a peristaltic pump chamber and pump tube installation structure, which can clamp various types of pump tubes and has the characteristics of good compatibility and a wide range of applications.

[0007] In order to achieve the above objectives, the following technical solutions are proposed:

[0008] A peristaltic pump chamber comprises a pump cover and a pump chamber seat, wherein the pump chamber seat is provided with an installation cavity for installing the peristaltic pump; the pump chamber seat is provided with a first pipe groove and a second pipe groove for arranging pipes, and a first pipe clamp and a second pipe clamp are respectively provided at the first pipe groove and the second pipe groove, and the first pipe clamp and the second pipe clamp are both connected with elastic elements for correspondingly clamping the pipes in the first pipe groove and the second pipe groove.

[0009] Furthermore, an ejection assembly is provided at the bottom of the first tube groove and / or the second tube groove.

[0010] Furthermore, the first pipeline clamp and the second pipeline clamp are hinged on the pump chamber seat, and a torsion spring is installed at the hinge to drive the first pipeline clamp and the second pipeline clamp to twist and return to their original positions; the first pipeline clamp and the second pipeline clamp have arc-shaped sides corresponding to the first pipe groove and the second pipe groove.

[0011] Furthermore, a vertical groove is provided on the inner wall of the pump chamber seat on the side of the ejection assembly.

[0012] Furthermore, the pump cover is provided with a first protrusion and a second protrusion corresponding to the positions of the first tube groove and the second tube groove.

[0013] Furthermore, the first pipeline clamp and the second pipeline clamp are hinged on the pump chamber seat, and a third protrusion for clamping the flipped side of the second pipeline clamp is provided on the pump cover.

[0014] Furthermore, guide portions are provided on the upper portions of the first pipeline clamp and the second pipeline clamp.

[0015] The utility model also provides a pump pipe installation structure, including a main pump pipe, a first pump pipe joint, a second pump pipe joint and the above-mentioned peristaltic pump chamber, the two ends of the main pump pipe are connected to the interfaces of the first pump pipe joint and the second pump pipe joint; the first pump pipe joint and the second pump pipe joint are respectively clamped in the first pipe groove and the second pipe groove, and are clamped and limited by the corresponding first pipe clamp and the second pipe clamp.

[0016] Furthermore, a clamping strip corresponding to the vertical clamping groove is provided on the side surface of the first pump pipe joint.

[0017] Furthermore, the first pump pipe connector and the second pump pipe connector are connected as one body via a connecting frame.

[0018] Furthermore, an avoidance hole is provided in the middle of the connecting frame.

[0019] The beneficial effects of the utility model are: 1. The pipeline clamp can clamp and release the pump pipe joint within a certain range by relying on the elastic element, and can clamp pipelines of different diameters, with good compatibility and a wide range of applications; 2. The ejection component cooperates with the rotation of the peristaltic pump to realize automatic disassembly and assembly of the pump pipe, thereby improving the convenience and efficiency of pipeline installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the pump chamber of the peristaltic pump of the utility model;

[0021] Figure 2 It is a cutaway view of the pipe clamp part of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the peristaltic pump assembly in the utility model;

[0023] Figure 4 This is the state of the automatic installation process of the pump pipe in the utility model Figure 1 ;

[0024] Figure 5 This is the state of the automatic installation process of the pump pipe in the utility model Figure 2 ;

[0025] Figure 6 This is the state of the automatic installation process of the pump pipe in the utility model Figure 3 ;

[0026] Figure 7 This is the state of the automatic installation process of the pump pipe in the utility model Figure 4 ;

[0027] Figure 8 This is the state of the automatic disassembly process of the pump tube in the utility model Figure 1

[0028] Fig. 9 This is the state of the automatic disassembly process of the pump tube in the utility model Figure 2

[0029] Fig.10 This is the state of the automatic disassembly process of the pump tube in the utility model Figure 3

[0030] Fig.11 This is a schematic diagram of the structure of the pump pipe joint in the utility model;

[0031] Fig.12 This is a schematic diagram of the installation of another pump pipe joint structure in the utility model;

[0032] Fig.13 It is another structural schematic diagram of the pump pipe joint in the utility model;

[0033] In the figure: 1. pump cover; 2. pump chamber seat; 3. mounting cavity; 4. first pipe groove; 5. second pipe groove; 6. first pipe clamp; 7. second pipe clamp; 8. elastic element; 9. ejector assembly; 10. vertical slot; 11. first protrusion; 12. second protrusion; 13. third protrusion; 14. guide portion; 15. main pump pipe; 16. first pump pipe joint; 17. second pump pipe joint; 18. clamping strip; 19. avoidance hole; 20. first mounting groove; 21. second mounting groove; 22. pump head; 23. pump wheel; 24. guide sheath; 25. drive assembly; 26. mounting hole; 27. shaft hole; 28. connecting frame. DETAILED DESCRIPTION

[0034] The following is a further description of the peristaltic pump chamber and pump tube installation structure of the utility model in conjunction with specific embodiments.

[0035] like Figure 2 As shown, the peristaltic pump assembly includes a pump head assembly, a driving assembly 25 that drives the pump head assembly to rotate in the installation cavity 3 in the pump chamber, and a pump wheel 23 and a guide sheath 24 are provided on the pump head assembly. The pump chamber is mainly a support member when the pump tube is working, which is used to support the pump tube and can cooperate with the pump head assembly to form a gap. The change of the gap can make the inner space of the pump tube peristaltic to generate liquid flow. In this embodiment, the driving assembly 25 is a motor, and the pump head assembly is a peristaltic pump. The front and rear ends of the peristaltic pump are respectively equipped with pump wheels 23, which are used to squeeze the pump tube to generate liquid flow during the rotation of the peristaltic pump. Symmetrical guide sheaths 24 are respectively installed on the upper, lower, left and right sides of the pump wheel 23, and the guide sheath 24 is used to introduce the pump tube into and limit it at the center position of the pump wheel 23 during the rotation of the peristaltic pump.

[0036] The peristaltic pump chamber in this scheme is as follows Figure 1 , Figure 2 As shown, it includes a pump cover 1 and a pump chamber seat 2, and the pump chamber seat 2 is provided with a mounting cavity 3 for installing a peristaltic pump; the pump chamber seat 2 is provided with a first pipe groove 4 and a second pipe groove 5 for accommodating pipes, and is characterized in that a first pipe clamp 6 and a second pipe clamp 7 are respectively provided at the first pipe groove 4 and the second pipe groove 5, and the first pipe clamp 6 and the second pipe clamp 7 are both connected with an elastic element 8 for correspondingly clamping the pipes in the first pipe groove 4 or the second pipe groove 5, and a ejection assembly 9 is provided at the bottom of the first pipe groove 4.

[0037] Compared with the prior art, this solution changes the groove for fixing the pump tube into a pipe clamp, and the first pump tube connector 16 and the second pump tube connector 17 can be correspondingly inserted into the first tube groove 4 and the second tube groove 5, and the first pipe clamp 6 and the second pipe clamp 7 can clamp the corresponding pump tube connector under the action of the elastic element 8. The pipe clamp can directly clamp the common pump tubes on the market with different diameters. This allows users to choose to use a dedicated pump tube or a universal pump tube, which can bring users a better experience.

[0038] An ejection assembly is provided at the bottom of the first tube groove and / or the second tube groove. In the present embodiment, the ejection assembly 9 is a rod-shaped structure, which is located in the through hole at the bottom of the first tube groove and can be moved up and down by motor control. One side of the installation cavity 3 is the pipeline inlet and outlet, i.e., the position of the first tube groove 4 and the second tube groove 5, and the inner wall on the other side is an arc segment, which matches the shape of the pump tube bending after the pipeline is installed. The pump cover 1 and the pump chamber seat 2 are hinged to achieve closing and opening. In other embodiments, the bottom of the first tube groove and the second tube groove can also be installed with ejection assemblies, or according to the different rotation directions of the peristaltic pump, the ejection assembly can be installed at the bottom of the second tube groove.

[0039] The first pipeline clamp 6 and the second pipeline clamp 7 can be spring clamps. The first pipeline clamp 6 and the second pipeline clamp 7 can also be hinged on the pump chamber seat 2, and connected to the pump chamber seat 2 through the elastic element 8 respectively. Specifically, the elastic element 8 is a torsion spring, which is used to drive the first pipeline clamp 6 and the second pipeline clamp 7 to twist back. The first pipeline clamp 6 and the second pipeline clamp 7 have a socket inside and an axial hole on the side. A connecting shaft is installed in the first installation groove 20 and the second installation groove 21. The side axial holes of the first pipeline clamp 6 and the second pipeline clamp 7 are installed on the connecting shaft accordingly. Figure 2 As shown, taking the first pipeline clamp 6 as an example, one end of the torsion spring extends into the jack, the spring hole of the torsion spring is inserted into the connecting shaft, and the other end of the torsion spring abuts against the pump chamber seat 2. The first pump pipe joint 16 squeezes the first pipeline clamp 6 to flip and then snaps into the first pipe groove 4, and is clamped in the first pipe groove 4 under the action of the torsion spring. The first pipeline clamp and the second pipeline clamp have arc-shaped sides corresponding to the first pipe groove and the second pipe groove. The arc-shaped design and the arc-shaped design of the first pipe groove and the second pipe groove can be applied to pump pipes of most sizes and are convenient for clamping. The pipeline clamp can clamp and release the pump pipe joint within a certain range by relying on the elastic element 8, and can clamp pipelines of different diameters. It has good compatibility and a wide range of applications.

[0040] The pump pipe installation structure in this scheme is as follows: Figures 2 to 13 As shown, it includes a main pump pipe 15, a first pump pipe joint 16, a second pump pipe joint 17 and the above-mentioned peristaltic pump chamber. The two ends of the main pump pipe 15 are connected to the interfaces of the first pump pipe joint 16 and the second pump pipe joint 17; the first pump pipe joint 16 and the second pump pipe joint 17 are respectively clamped in the first pipe groove 4 and the second pipe groove 5, and are clamped and limited by the corresponding first pipe clamp 6 and the second pipe clamp 7.

[0041] like Figure 1 As shown, in the mounting cavity 3 of the pump chamber seat 2, there are an axial hole 27 and a mounting hole 26 for mounting a peristaltic pump, and a driving assembly 25 is mounted at the bottom of the axial hole 27, and a driving shaft of the driving assembly 25 is drivingly connected to the peristaltic pump.

[0042] In the automatic pipeline installation stage, the ejector assembly 9 is retracted to be flush with the installation surface of the first pipe groove 4. There are position monitoring components on the peristaltic pump. In this working state, the peristaltic pump is controlled to stop at the expected fixed position. Open the pump cover 1, clamp the first pump pipe joint 16 and the second pump pipe joint 17 on the corresponding first pipeline clamp 6 and the second pipeline clamp 7, and then close the pump cover 1. The pump cover 1 is provided with a signal element for monitoring the opening and closing of the pump cover 1. When the pump cover 1 is closed, the drive assembly 25 will drive the peristaltic pump to rotate automatically, and the peristaltic pump will use the guide sheath 24 to introduce the pump tube. In the automatic unloading pump tube stage, in this working state, the peristaltic pump will first be controlled to stop at the expected fixed position, and the ejector assembly 9 will extend upward to push up the first pump pipe joint 16, so that the outer diameter of the main pump tube 15 at this location is higher than the height of the guide sheath 24, and then the peristaltic pump will rotate and use the guide sheath 24 to lead out the main pump tube 15, so that the main pump tube 15 is out of the pump chamber.

[0043] The installation of universal pipelines requires manual intervention. The main operation method is to place the first pump pipe connector 16 and the second pump pipe connector 17 into the corresponding first pipe groove 4 and the second pipe groove 5, and clamp them with the first pipe clamp 6 and the second pipe clamp 7. Manually rotate the peristaltic pump, and after the peristaltic pump is introduced into the pump tube, place another pump pipe connector. The purpose of this operation is to first ensure the correct position of the pipe connector during installation, and the installation position of the first pump pipe connector 16 and the second pump pipe connector 17 is correct. At the same time, because the length of the pump tube between the two connectors often exceeds the length in the pump chamber cavity, it is necessary to manually rotate the peristaltic pump so that the length of the pump tube in the pump chamber cavity is appropriate.

[0044] The first pump pipe connector 16 and the second pump pipe connector 17 can also be connected as a whole through the connecting frame 28, so as to facilitate the first pump pipe connector 16 and the second pump pipe connector 17 to be inserted into the first pipe groove 4 and the second pipe groove 5 at one time; in this solution, Fig.11 , Fig.12 , Fig.13 As shown, an avoidance hole 19 is provided in the middle of the connecting frame 28 to avoid the pump chamber seat 2 structure between the first pipeline clamp 6 and the second pipeline clamp 7 .

[0045] In order to ensure that the pump pipe inlet and outlet can be installed correctly, in this embodiment, a vertical slot 10 is provided on the inner wall of the pump chamber seat 2 on the side of the ejection assembly 9, and a clamping strip 18 corresponding to the vertical slot 10 is provided on the side of the first pump pipe joint 16. When installing the pump pipe joint, the first pump pipe joint 16 with the clamping strip 18 can be clamped into the pipe groove on one side with the vertical slot 10.

[0046] like Figure 1As shown, the pump cover 1 is provided with a first protrusion 11 and a second protrusion 12 corresponding to the positions of the first pipe groove 4 and the second pipe groove 5. The first protrusion 11 and the second protrusion 12 can press the first pump pipe joint 16 and the second pump pipe joint 17 when the pump cover 1 is closed, and assist in installing the first pump pipe joint 16 and the second pump pipe joint 17 in place. The first protrusion 11 and the second protrusion 12 can be a rib-like structure or a cylindrical structure.

[0047] The first pipe clamp 6 and the second pipe clamp 7 are hinged on the pump chamber seat 2. Specifically, the first pipe clamp mounting groove and the second pipe clamp mounting groove are respectively provided in the first pipe groove 4 and the second pipe groove 5. The first pipe clamp 6 and the second pipe clamp 7 are respectively hinged in the first pipe clamp mounting groove and the second pipe clamp mounting groove.

[0048] The upper parts of the first pipeline clamp 6 and the second pipeline clamp 7 are both provided with a guide portion 14. The guide portion 14 is a slope design on the first pipeline clamp 6 and the second pipeline clamp 7, and there is also a guide strip on the slope to facilitate the pump pipe joint to be smoothly inserted into the pipeline clamp.

[0049] The peristaltic pump chamber and pump tube installation structure of this solution can assist in realizing the function of automatic disassembly and assembly of the pump tube. Except for inserting the pump tube connector into the corresponding tube groove, no manual intervention is required. The process is as follows:

[0050] like Figure 3 As shown, it is the initial working state, that is, the state before preparing to automatically install the pipeline. The peristaltic pump stops at a fixed position, and the top of the ejection assembly 9 is flush with the first pipe groove 4 to prevent interference with the main pump pipe 15.

[0051] like Figure 4 As shown, after opening the pump cover 1, it is necessary to manually place the first pump pipe joint 16 and the second pump pipe joint 17 into the first pipe groove 4 and the second pipe groove 5 respectively. At this time, the height of a section of the main pump pipe 15 located at the first pump pipe joint 16 and the second pump pipe joint 17 is lower than the guide sheath 24 above the pump wheel 23 on one side.

[0052] like Figure 5 As shown, after the pump pipe joint is installed, close the pump cover 1 (to show the internal structure, Figure 5-Figure 9 The pump cover 1 is closed and detected, and the peristaltic pump starts to rotate. In this solution, the magnet and reed switch are used to monitor the opening and closing status of the pump cover 1. The magnet is installed on the pump cover 1, and the reed switch is installed on the pump chamber seat 2 to sense the magnet signal. The sensing element can also be replaced by a Hall element. The magnet can also make the pump cover 1 and the pump chamber seat 2 attract each other.

[0053] like Figure 6As shown, as the peristaltic pump starts to rotate, the guide sheath 24 starts to introduce the main pump tube 15. However, at this time, the guide sheath 24 of one pump wheel 23 is introducing the pump tube, and the guide sheath 24 of the other pump wheel 23 is lower than the main pump tube 15. As the rotation occurs, the pump tube at that location will be pushed out. Therefore, the third protrusion 13 for clamping the flipped side of the second pipe clamp 7 is provided on the pump cover 1 in this solution. The traditional solution is to add an undercut structure to the pump pipe joint at the other end, which makes installation difficult. The solution of this solution is to use the third protrusion 13 in the middle of the pump cover 1 to abut against the side of the second pipe clamp 7 when the pump cover 1 is closed, so as to limit the second pipe clamp 7 and prevent it from flipping. The opening angle of the pipe clamp is further limited, so that the pump pipe joint is fixed.

[0054] like Figure 7 As shown, when the guide sheath 24 on one side of the second pipeline clamp 7 is further rotated, the section of the main pump tube 15 is no longer pushed out, the main pump tube 15 is introduced as a whole, and the automatic installation of the pump tube is completed.

[0055] like Figure 8 As shown, the process of automatically disassembling the main pump tube 15 begins. The peristaltic pump is controlled to stop at a predetermined position, and the ejection assembly 9, driven by the motor, ejects the first pump tube connector 16 to a certain height, so that a section of the main pump tube 15 at the first pump tube connector 16 is higher than the height of the guide sheath 24 (at this time, the pump cover 1 may be opened with the ejection, but it does not affect the disassembly of the pump tube).

[0056] like Fig. 9 As shown, at this time, the peristaltic pump starts to rotate toward the ejection end. Since the guide sheath 24 is lower than the main pump tube 15 when it contacts the main pump tube 15, the main pump tube 15 starts to be ejected until Fig.10 As shown, the main pump pipe 15 is completely led out, and the entire pump pipe is unloaded, and the ejection assembly 9 is reset.

Claims

1. A peristaltic pump chamber, comprising a pump cover (1) and a pump chamber seat (2), wherein the pump chamber seat (2) is provided with a mounting cavity (3) for mounting the peristaltic pump; the pump chamber seat (2) is provided with a first pipe groove (4) and a second pipe groove (5) for accommodating a pipeline, wherein: A first pipe clamp (6) and a second pipe clamp (7) are respectively provided at the first pipe groove (4) and the second pipe groove (5) for correspondingly clamping the pipes in the first pipe groove (4) and the second pipe groove (5).

2. The peristaltic pump chamber according to claim 1, characterized in that: The first pipeline clamp (6) and the second pipeline clamp (7) are hinged on the pump chamber seat (2), and a torsion spring is installed at the hinge to drive the first pipeline clamp (6) and the second pipeline clamp (7) to twist and return to their original positions; the first pipeline clamp (6) and the second pipeline clamp (7) are both arc-shaped on one side close to the first pipe groove (4) and the second pipe groove (5).

3. The peristaltic pump chamber according to claim 1 or 2, characterized in that: An ejection assembly (9) is provided at the bottom of the first tube groove (4) and / or the second tube groove (5).

4. The peristaltic pump chamber according to claim 3, characterized in that: A vertical groove (10) is provided on the inner wall of the pump chamber seat (2) on the side of the ejection assembly (9).

5. A peristaltic pump chamber as claimed in claim 1, 2 or 4, characterized in that: The pump cover (1) is provided with a first protrusion (11) and a second protrusion (12) corresponding to the positions of the first tube groove (4) and the second tube groove (5).

6. The peristaltic pump chamber according to claim 3, characterized in that: The pump cover (1) is provided with a first protrusion (11) and a second protrusion (12) corresponding to the positions of the first tube groove (4) and the second tube groove (5).

7. A peristaltic pump chamber as claimed in claim 1, 2, 4 or 6, characterized in that: A third protrusion (13) is provided on the pump cover (1) for clamping the flipped side of the second pipeline clamp (7).

8. The peristaltic pump chamber of claim 3, wherein: A third protrusion (13) is provided on the pump cover (1) for clamping the flipped side of the second pipeline clamp (7).

9. The peristaltic pump chamber of claim 5, wherein: A third protrusion (13) is provided on the pump cover (1) for clamping the flipped side of the second pipeline clamp (7).

10. A peristaltic pump chamber as claimed in claim 1, 2, 4, 6, 8 or 9, characterized in that: The upper parts of the first pipeline clamp (6) and the second pipeline clamp (7) are both provided with guide parts (14).

11. A pump pipe installation structure, characterized in that: It comprises a main pump pipe (15), a first pump pipe joint (16), a second pump pipe joint (17) and a peristaltic pump chamber as described in any one of claims 1 to 10, wherein both ends of the main pump pipe (15) are connected to the interfaces of the first pump pipe joint (16) and the second pump pipe joint (17); the first pump pipe joint (16) and the second pump pipe joint (17) are respectively clamped in the first pipe groove (4) and the second pipe groove (5), and are clamped and limited by the corresponding first pipe clamp (6) and the second pipe clamp (7).

12. The pump tube installation structure according to claim 11, characterized in that: A clamping strip (18) corresponding to the vertical clamping groove (10) is provided on the side surface of the first pump pipe joint (16).

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