peristaltic pump

Abstract

This utility model discloses a peristaltic pump, relating to the technical field of fluid transfer pump equipment. The peristaltic pump includes a first extrusion section and a second extrusion section, with the second extrusion section movably disposed relative to the first extrusion section. This allows for control of the distance between the first and second extrusion sections, thereby regulating the pressure of the pump tube passing through the first and second extrusion sections. This meets the needs of different application scenarios and enables more precise control of the liquid flow rate within the pump tube. Furthermore, because the pressure on the pump tube is adjustable, when the peristaltic pump is not operating, the pressure on the pump tube passing through the first and second extrusion sections can be adjusted to a minimum level, thereby reducing unnecessary extrusion of the pump tube, reducing fatigue and deformation of the pump tube material, and extending the service life of the pump tube.

Description

Technical Field

[0001] This utility model relates to the field of fluid transfer pump equipment technology, and in particular to a peristaltic pump. Background Technology

[0002] Peristaltic pumps are frequently used in chemical analysis instruments and laboratory equipment for liquid delivery, especially in applications requiring stable flow rates and high repeatability. Peristaltic pumps conveniently and quickly provide accurate and stable delivery of various reagents, making them a core component of chemical analysis instruments and equipment. However, current peristaltic pumps lack the ability to regulate pump tubing pressure, failing to meet the varying liquid flow requirements of different applications. Furthermore, when not in use, to prevent material fatigue and deformation caused by prolonged compression of the pump tubing, the pump cover needs to be manually lifted, resulting in a low level of automation for peristaltic pumps. Utility Model Content

[0003] The main purpose of this invention is to propose a peristaltic pump that aims to improve the current peristaltic pumps, which cannot regulate the pump tube pressure, resulting in poor infusion stability and low automation.

[0004] To achieve the above objectives, this utility model proposes a peristaltic pump, comprising:

[0005] The frame has a receiving space formed inside it, and the upper part of the receiving space has an opening that communicates with the outside.

[0006] The first extrusion section is rotatably arranged within the accommodating space;

[0007] A second extrusion section is movably arranged on the top of the frame, and the second extrusion section covers the opening. The second extrusion section is spaced above the first extrusion section, so that the space between the first extrusion section and the second extrusion section forms a channel for passing through the pump pipe; and

[0008] A driving component is provided on the frame and is connected to the second extrusion part. The driving component is used to control the movement of the second extrusion part relative to the first extrusion part to adjust the distance between the first extrusion part and the second extrusion part.

[0009] In one embodiment, the drive member has a drive section that moves along the height direction of the frame;

[0010] One end of the second extrusion part is rotatably mounted on the top of the frame, and the other end is movably connected to the drive part;

[0011] The drive unit moves along the height direction of the frame to adjust the distance between the first extrusion unit and the second extrusion unit.

[0012] In one embodiment, the second extrusion section includes:

[0013] A cover plate is placed over the opening, with one end of the cover plate rotatably mounted on the top of the frame. The space between the cover plate and the first pressing part forms the channel.

[0014] A connector is provided on the cover plate, and at least part of the upper end of the drive unit extends upward from the frame, and one end of the drive unit extending out of the frame is connected to the connector;

[0015] The drive unit moves along the height direction of the frame and drives the cover plate to rotate relative to the first extrusion unit through the connector, so as to adjust the distance between the first extrusion unit and the second extrusion unit.

[0016] In one embodiment, the connector includes:

[0017] A wrench, movably mounted on the cover plate, the wrench having a locking position against the top of the cover plate and an unlocking position that is removed from the top of the cover plate; and

[0018] A connecting rod, one end of which is rotatably connected to the wrench and the other end of which is rotatably connected to the drive unit;

[0019] In the height direction of the frame, the wrench is in the locked position. The drive unit drives the wrench to move down through the connecting rod, which drives the cover plate to rotate toward the first pressing part. The drive unit drives the wrench to move up to a preset position through the connecting rod, and drives the wrench to rotate relative to the cover plate, so that the wrench moves from the locked position to the unlocked position.

[0020] In one embodiment, in the height direction of the frame, the cover plate is provided with a through hole at a position corresponding to the drive unit, and one end of the drive unit extending upward from the frame is placed in the through hole;

[0021] At least a portion of the bottom of the connecting rod extends into the through hole, and the through hole is open at one end away from the rotation axis of the cover plate, for driving the wrench from the locked position to the unlocked position when the drive part moves up to the preset position.

[0022] In one embodiment, the driving element includes:

[0023] A linear motor, mounted on the frame, the linear motor having a lifting part movable along the height direction of the frame; and

[0024] The abutting part, in the height direction of the frame, has one end fixedly connected to the lifting part and the other end pressed against the bottom of the driving part;

[0025] The elastic element can undergo elastic deformation along the height direction of the frame. One end of the elastic element is connected to the drive unit, and the other end is connected to the frame.

[0026] In one embodiment, a guide hole is formed in the frame body in the height direction, the drive unit is movably disposed in the guide hole, and the drive unit extends upward from the top of the guide hole;

[0027] The elastic element is housed in the guide hole and is sleeved on the outer periphery of the drive part; one end of the elastic element is pressed against the drive part and the other end is pressed against the top wall of the guide hole.

[0028] In one embodiment, the first extrusion section includes:

[0029] The rotating shaft is rotatably mounted within the receiving space; and

[0030] The mounting plate is provided in two parts, and the two mounting plates are coaxially mounted on the rotating shaft, and the two mounting plates are arranged at intervals along the length direction of the rotating shaft.

[0031] Rollers extend along the length of the rotating shaft. There are multiple rollers arranged at intervals around the rotating shaft, and the two ends of each roller are rotatably connected to the mounting plate.

[0032] In one embodiment, the rollers and the rotating mounting portions of the mounting plates are spaced apart from the outer peripheral edge of the mounting plates, so as to form a compression space between the two mounting plates on the side of the plurality of rollers away from the rotating shaft;

[0033] The second extrusion part has a cover portion extending into the extrusion space on the side facing the first extrusion part, so that the channel is formed between the abutment part and the roller.

[0034] In one embodiment, the peristaltic pump further includes:

[0035] A rotary motor, mounted on the frame; and

[0036] A synchronous belt pulley assembly, one end of which is connected to the output shaft of the rotary motor and the other end of which is connected to the rotating shaft.

[0037] This peristaltic pump includes a first extrusion section and a second extrusion section, with the second extrusion section being movably arranged relative to the first extrusion section. This allows for control of the distance between the first and second extrusion sections, thereby enabling pressure regulation of the pump tube passing through the first and second extrusion sections. This meets the needs of different usage scenarios and allows for more precise control of the liquid flow rate within the pump tube. Furthermore, because the pressure on the pump tube is adjustable, when the peristaltic pump is not in operation, the pressure on the pump tube passing through the first and second extrusion sections can be adjusted to a minimum level (without manually lifting the pump cover). This reduces unnecessary extrusion of the pump tube, minimizes fatigue and deformation of the pump tube material, and extends the service life of the pump tube. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the overall structure of the peristaltic pump of this utility model;

[0040] Figure 2 This is a schematic diagram of the peristaltic pump of this utility model from another perspective;

[0041] Figure 3 This is a cross-sectional view of the peristaltic pump of this utility model;

[0042] Figure 4 This is a schematic diagram of the peristaltic pump drive component of this utility model;

[0043] Figure 5 This is a schematic diagram showing the separation of the first extrusion section and the second extrusion section of the peristaltic pump of this utility model;

[0044] Figure 6 This is a schematic diagram of the second extrusion section of the peristaltic pump of this utility model;

[0045] Figure 7 This is a schematic diagram of the first extrusion section of the peristaltic pump of this utility model;

[0046] Figure 8 This is a schematic diagram showing the cooperation relationship between the first extrusion section and the second extrusion section of the peristaltic pump of this utility model;

[0047] Figure 9 This is a schematic diagram of the three-way valve structure of the peristaltic pump of this utility model;

[0048] Figure 10This is a schematic diagram of the peristaltic pump wrench of this utility model moving from the locked position to the unlocked position.

[0049] Explanation of icon numbers:

[0050] 1. Frame; 11. Accommodation space; 12. Guide hole; 13. Limiting groove;

[0051] 2. First extrusion section; 21. Rotary shaft; 22. Mounting plate; 23. Roller; 231. Bearing; 24. Extrusion space;

[0052] 3. Second extrusion section; 31. Cover plate; 311. Perforation; 32. Connector; 321. Wrench; 322. Connecting rod; 33. Cover part; 331. Arc-shaped surface;

[0053] 4. Passageway;

[0054] 5. Driving component; 51. Driving unit; 52. Linear motor; 521. Lifting unit; 53. Abutment unit; 54. Elastic component;

[0055] 6. Rotary drive components; 61. Rotary motor; 62. Synchronous belt pulley set; 621. Synchronous belt; 622. Synchronous pulley;

[0056] 7. Encoder; 8. Three-way valve; 81. First inlet; 82. Second inlet; 83. Outlet.

[0057] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0058] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0059] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0060] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0061] Peristaltic pumps are frequently used in chemical analysis instruments and laboratory equipment for liquid delivery, especially in applications requiring stable flow rates and high repeatability. Peristaltic pumps provide convenient and rapid, accurate, and stable delivery of various reagents, making them a core component of chemical analysis instruments and equipment. However, current peristaltic pumps lack the ability to regulate pump tubing pressure, failing to meet the varying liquid flow requirements of different applications. Furthermore, even when not in use, the pump tubing remains subjected to pressure from the rollers, leading to fatigue and deformation of the tubing material and shortening its lifespan.

[0062] Based on this, refer to Figure 1 , Figure 2 , Figure 5 As shown, this application embodiment provides a peristaltic pump, including a frame 1, a first extrusion section 2, a second extrusion section 3, and a drive component 5; wherein, as... Figure 5 As shown, a receiving space 11 is formed inside the frame 1, and an opening communicating with the outside is provided above the receiving space 11. The first extrusion part 2 is rotatably arranged in the receiving space 11. The second extrusion part 3 is movably arranged on the top of the frame 1 and covers the opening. The second extrusion part 3 is spaced above the first extrusion part 2 so that the space between the first extrusion part 2 and the second extrusion part 3 forms a channel 4 for the pump pipe to pass through. It can be understood that the pump pipe is a flexible pipe. The driving member 5 is provided on the frame 1 and is connected to the second extrusion part 3. It is used to control the movement of the second extrusion part 3 relative to the first extrusion part 2 to adjust the distance between the first extrusion part 2 and the second extrusion part 3, thereby adjusting the extrusion force on the pump pipe passing through the channel 4.

[0063] In this embodiment, as Figure 3As shown, during use, one end of the pump tube is inserted into the channel 4 from one side and extends outward from the other side of the channel 4, thus allowing the pump tube to pass through the channel 4 between the first extrusion part 2 and the second extrusion part 3. The first extrusion part 2 is rotatably arranged within the receiving space 11, and has extrusion members for extruding the pump tube. That is, when the pump tube passes through the channel 4, with the rotation of the first extrusion part 2, the extrusion members on the first extrusion part 2 intermittently extrude pressure on the pump tube passing through the channel 4, thereby achieving the effect of transporting the liquid in the pump tube. It can be understood that the first extrusion part 2 is provided with multiple extrusion members arranged at intervals around the rotation axis of the first extrusion part 2. With the rotation of the extrusion part within the receiving space 11, each extrusion member can contact the pump tube passing through the channel 4 at intervals and extrude pressure on the pump tube, thereby achieving the effect of continuous liquid transport. The method and principle of liquid transport using the peristaltic pump and pump tube are existing technologies, and will not be described in detail in this solution.

[0064] Furthermore, in order to improve the positioning effect of the pump pipe, such as Figure 1 , Figure 2 , Figure 5 As shown, limiting grooves 13 for locking and limiting the pump pipe are installed on both sides of the frame 1. That is, the two ends of the pump pipe extending from the channel 4 are respectively locked into the corresponding limiting grooves 13, thereby realizing the milling and limiting of the pump pipe for replacement. It can be understood that multiple pump pipes can be inserted into the channel 4, and the number of pump pipes is set according to the actual use requirements. A certain number of limiting grooves 13 installed on both sides of the frame 1 should be reserved to ensure that each pump pipe can be locked and limited when there are many pump pipes.

[0065] In this embodiment, the second extrusion section 3 is moved relative to the first extrusion section 2 by the control drive component 5. This allows adjustment of the distance between the first extrusion section 2 and the second extrusion section 3, thereby adjusting the width of the channel 4 and adjusting the extrusion force on the pump tube passing through the channel 4. The greater the distance between the first extrusion section 2 and the second extrusion section 3, the smaller the extrusion force on the pump tube; the smaller the distance between the first extrusion section 2 and the second extrusion section 3, the greater the extrusion force on the pump tube. This makes the extrusion force on the pump tube adjustable, allowing for precise control of the liquid flow rate according to different usage scenarios, thus improving the applicability of the peristaltic pump. In this embodiment, when the peristaltic pump is not working, the distance between the first extrusion section 2 and the second extrusion section 3 is adjusted to the maximum level, thereby minimizing the extrusion force on the pump tube passing through the channel 4. This reduces unnecessary extrusion on the pump tube, preventing fatigue and deformation of the pump tube material due to prolonged extrusion at the contact points between the pump tube and the first extrusion section 2 and the second extrusion section 3, and helping to improve the service life of the pump tube.

[0066] Reference Figure 3 , Figure 4 As shown, in one embodiment of this application, the driving member 5 has a driving part 51 that moves along the height direction of the frame 1; as Figure 2 As shown, one end of the second extrusion part 3 is rotatably mounted at the top of the frame 1, and the other end of the second extrusion part 3 is movably connected to the drive part 51. When the drive part 51 moves along the height direction of the frame 1, it can drive the second extrusion part 3 to rotate relative to the first extrusion part 2, thereby adjusting the distance between the first extrusion part 2 and the second extrusion part 3, and thus adjusting the extrusion force on the pump pipe passing through the channel 4.

[0067] In this embodiment, one end of the second extrusion part 3 is rotatably mounted to the top of the frame 1, and the other end is movably connected to the drive part 51. This achieves the following: in the height direction of the frame 1, when the drive part 51 moves downward, it drives the second extrusion part 3 to rotate toward the direction close to the first extrusion part 2, thereby narrowing the space of the channel 4 between the first extrusion part 2 and the second extrusion part 3, thereby increasing the extrusion force on the pump pipe passing through the channel 4.

[0068] In the height direction of the frame 1, when the drive unit 51 moves upward, the squeezing force applied to the pump pipe by the second squeezing unit 3 decreases, thereby reducing the squeezing force on the pump pipe passing through the channel 4. It can be understood that when the drive unit 51 moves upward, since the squeezing force applied to the pump pipe by the second squeezing unit 3 decreases, the liquid in the pump pipe will force the second squeezing unit 3 to rotate slightly away from the first squeezing unit 2 under the support of the liquid, thereby widening the channel 4 between the first squeezing unit 2 and the second squeezing unit 3.

[0069] Reference Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, in one embodiment of this application, the second extrusion section 3 includes a cover plate 31 and a connector 32; wherein, the cover plate 31 is provided at the opening, and one end of the cover plate 31 is rotatably mounted on the top of the frame 1, and the cover plate faces the first extrusion section 2 and forms the channel 4 between the cover plate and the first extrusion section 2; the connector 32 is provided on the cover plate 31, and the upper end of the drive section 51 extends upward at least partially out of the frame 1, and one end of the drive section 51 extending upward out of the frame 1 is connected to the connector 32; when the drive section 51 moves along the height direction of the frame 1, the connector 32 drives the cover plate 31 to rotate toward the first extrusion section 2, thereby adjusting the distance between the first extrusion section 2 and the second extrusion section 3, and adjusting the extrusion force of the pump pipe passing through the channel 4.

[0070] In this embodiment, the connector 32 is used to connect the drive unit 51 and the cover plate 31 and to transmit the driving force. Thus, when the drive unit 51 moves downward, the connector 32 applies a downward force to the cover plate 31, causing the cover plate 31 to rotate toward the first extrusion unit 2, thereby narrowing the channel 4 and increasing the extrusion force on the pump tube. When the drive unit 51 moves upward, the downward force applied to the cover plate 31 by the connector 32 decreases, thereby reducing the extrusion force of the cover plate 31 on the pump tube passing through the channel 4. This enables precise control of the liquid flow rate and meets the usage requirements in different scenarios.

[0071] Reference Figure 3 , Figure 4 , Figure 5 , Figure 10 As shown, in one embodiment of this application, the connector 32 includes a wrench 321 and a connecting rod 322; wherein the wrench 321 is movably disposed relative to the cover plate 31, and the wrench 321 has a locking position that presses against the top of the cover plate 31, and an unlocking position that moves away from the top of the cover plate 31, as shown. Figure 10As shown, the solid line represents the wrench 321 in the locked position, and the dashed line represents the wrench 321 in the unlocked position. One end of the connecting rod 322 is rotatably connected to the wrench 321, and the other end is rotatably connected to the drive unit 51. In the height direction of the frame 1, when the wrench 321 is in the locked position, that is, when the wrench 321 is pressing against the top of the cover plate 31, the drive unit 51 moves downward by applying a downward pulling force to the wrench 321 through the connecting rod 322, and the wrench 321, which is in contact with the top of the cover plate 31, applies this downward pulling force. The force is transferred to the cover plate 31, which in turn drives the cover plate 31 to rotate toward the first extrusion part 2, thereby increasing the extrusion force on the pump pipe passing through the channel 4. When the wrench 321 is in the locked position, the drive part 51 moves upward and applies an upward pushing force to the wrench 321 through the connecting rod 322, thereby reducing the pressure applied by the wrench 321 to the top of the cover plate 31, thereby reducing the extrusion force applied downward by the cover plate 31 to the pump pipe passing through the channel 4, and thus reducing the extrusion force on the pump pipe passing through the channel 4.

[0072] In this embodiment, by adjusting the wrench 321 from the locked position to the unlocked position, the restriction on the cover plate 31 can be released, and the cover plate 31 can be driven to rotate relative to the frame 1, thereby opening the opening. At this time, the channel 4 is also opened, and the number of pump pipes passing through the channel 4 can be adjusted, for example, increasing or decreasing the number of pump pipes, or adjusting the pump pipes used to transport different liquids, etc.

[0073] Understandably, to adjust the wrench 321 from the locked position to the unlocked position, it is necessary to first control the drive unit 51 to move upward a preset distance. As the drive unit 51 moves upward, the connecting rod 322 simultaneously pushes the wrench 321 upward, reducing the pressure between the wrench 321 and the top of the cover plate 31 to a minimum. At this point, the operator can hold the wrench 321 and drive it to rotate in a direction away from the rotation axis of the cover plate 31. Figure 3 As shown, at this time, relative rotation will occur between the wrench 321 and the connecting rod 322, and between the connecting rod 322 and the drive unit 51. This causes the wrench 321, which was originally pressing against the top of the cover plate 31, to move out from the top of the cover plate 31 and move to the side of the cover plate 31. At this time, the wrench 321 no longer locks or positions the cover plate 31. The operator can rotate the cover plate 31 relative to the frame 1 and open the opening to adjust the number or type of pump pipes.

[0074] In this embodiment, the reason why the wrench 321 and the drive unit 51 are connected by a connecting rod 322, with one end of the connecting rod 322 rotatably mounted to the wrench 321 and the other end rotatably mounted to the drive unit 51, is so that when the cover plate 31 needs to be opened, the drive unit 51 is controlled to move upward to a preset position, thereby reducing the pressure between the wrench 321 and the top of the cover plate 31 to a minimum. Figure 10 As shown, at this time, the operator can drive the wrench 321 to rotate relative to the cover plate 31. Because the pressure between the wrench 321 and the top of the cover plate 31 is minimal at this time, the operator can easily drive the wrench 321 to rotate relative to the cover plate 31 and move it from the locked position to the unlocked position. At this time, the cover plate 31 is no longer subjected to pressure from the wrench 321, and the operator can drive the cover plate 31 to rotate relative to the frame 1, thereby opening the opening at the upper end of the receiving space 11 for adjusting the number of pump pipes or for replacing pump pipes that transport different liquids.

[0075] It is understandable that, such as Figure 10 As shown, when it is necessary to lock the cover plate 31 onto the frame 1, the cover plate 31 is first driven to rotate relative to the frame 1, so that the cover plate 31 changes from the open state to the closed state, that is, the cover plate 31 is placed over the opening. Then, the operator holds the wrench 321 and drives the wrench 321 to rotate in a direction close to the rotation axis of the cover plate 31. With the movement of the wrench 321, the connecting rod 322 moves synchronously, so that the wrench 321 rotates to the position shown. Figure 10 At the position indicated by the solid line, the wrench 321 is in the locked position. Then, along the height direction of the frame 1, the control drive unit 51 moves downward, which in turn drives the wrench 321, which is in the locked position, to move downward through the connecting rod 322. This increases the pressure applied by the wrench 321 to the cover plate 31, thereby increasing the squeezing force on the pump pipe passing through the channel 4. By controlling the downward movement distance of the drive unit 51, the squeezing force on the pump pipe passing through the channel 4 can be controlled.

[0076] Reference Figure 5 As shown, in one embodiment of this application, in the height direction of the frame 1, the cover plate 31 and the drive unit 51 are respectively provided with through holes 311, and one end of the drive unit 51 extending upward from the frame 1 is placed in the through hole 311; as shown Figure 3 As shown, at least a portion of the bottom of the connecting rod 322 extends into the through hole 311. The end of the through hole 311 opposite to the rotation axis of the cover plate 31 is open, which is used to drive the wrench 321 from the locked position to the unlocked position when the drive unit 51 moves up to the preset position.

[0077] In this embodiment, a through hole 311 is provided at the end of the cover plate 31 away from its rotation axis, and the through hole 311 penetrates the end of the cover plate 31 away from its rotation axis. This allows the drive unit 51 to move upwards to a preset position when the cover plate 31 needs to be opened, minimizing the pressure between the wrench 321 and the top of the cover plate 31. At this time, the operator drives the wrench 321 to rotate relative to the cover plate 31, that is, the wrench 321 rotates from... Figure 10 The position indicated by the solid line rotates towards the position indicated by the dashed line; and the open through hole 311 is provided so that the connecting rod 322, which is rotatably connected to the wrench 321, extends outward from the through hole 311 in sync with the rotation of the wrench 321.

[0078] Reference Figure 3 As shown, in one embodiment of this application, the driving member 5 includes a linear motor 52, an abutment portion 53, and an elastic member 54; wherein, the linear motor 52 is mounted on the frame 1 and the linear motor 52 has a lifting portion 521 that can move along the height direction of the frame 1; as Figure 3 , Figure 4 As shown, one end of the abutment part 53 is fixedly connected to the lifting part 521, and the outer periphery of the abutment part 53 has an outwardly extending protrusion, so that the bottom of the drive part 51 presses against the upper surface of the protrusion; the elastic member 54 can generate elastic deformation along the height direction of the frame 1, and one end of the elastic member 54 is connected to the drive part 51 and the other end is connected to the frame 1.

[0079] In this embodiment, the elastic element 54 can be a spring, and the spring is sleeved on the outer periphery of the drive part 51. The top of the spring abuts against the frame 1, and the bottom of the spring abuts against the drive part 51, such as... Figure 4 As shown, the drive unit 51 is arranged in a stepped shape, with a boss structure formed on the outer periphery of the drive unit 51, and the bottom of the elastic member 54 presses against the upper surface of the boss structure. Initially, the elastic member 54 is in a compressed state, at which time the elastic member 54 applies a large elastic downward pressure to the drive unit 51, and the linear motor 52 needs to provide sufficient torque to overcome the large elastic downward pressure applied by the elastic member 54. When it is necessary to increase the squeezing force on the pump tube passing through the channel 4, the linear motor 52 is controlled to drive the lifting unit 521 to move downward, and the elastic member 54 gradually releases its stored elastic energy and forces the drive unit 51 to move downward synchronously. Thus, through the cooperation of the drive unit 51, the connecting rod 322, and the wrench 321, the elastic downward pressure released by the elastic member 54 is applied to the cover plate 31, and the cover plate 31 is driven to rotate towards the first squeezing part 2, thereby increasing the squeezing force on the pump tube passing through the channel 4.

[0080] Understandably, when it is necessary to reduce the squeezing force on the pump pipe passing through the channel 4, the linear motor 52 is controlled to drive the lifting part 521 to move upward, thereby driving the driving part 51 to move upward through the abutment part 53 and continuing to compress the elastic member 54. As the driving part 51 moves upward, the downward pressure applied by the wrench 321 to the cover plate 31 is reduced, thereby reducing the squeezing force on the pump pipe passing through the channel 4.

[0081] In this embodiment, the lifting unit 521 is controlled by the linear motor 52 to lift and lower in the height direction of the frame 1. The downward pressure applied by the wrench 321 to the top of the cover plate 31 can be adjusted by the coordinated action of the elastic element 54, the drive unit 51, the connecting rod 322, and the wrench 321. This adjusts the squeezing force on the pump pipe passing through the channel 4 to meet the usage requirements in different usage scenarios and to accurately control the flow rate of the liquid.

[0082] It is understandable that the linear motor 52 is a device that directly converts electrical energy into linear motion mechanical energy without the need for an intermediate conversion mechanism. Since it is existing technology, its working principle will not be described in detail here.

[0083] In this embodiment, as Figure 1 , Figure 5 As shown, an encoder 7 is installed at the bottom of the linear motor 52 to estimate the output torque of the linear motor 52. The output torque of the linear motor 52 is positively correlated with the compression degree of the elastic element 54. The greater the compression of the elastic element 54, the greater the torque that the linear motor 52 needs to output on the lifting part 521 to overcome the elastic force from the elastic element 54. The compression of the elastic element 54 directly determines the squeezing force on the pump tube passing through the channel 4. In this embodiment, the output torque of the linear motor 52 can be transmitted to the corresponding control module through the encoder 7. By establishing a relationship model between the pump tube squeezing force and the output torque of the linear motor 52, an adaptive system for the pump tube squeezing state is established, thereby providing an intelligent solution for stable flow output.

[0084] In one embodiment, the output torque of the motor can also be estimated by setting a torque sensor or detecting the current change in the linear motor 52. In specific implementation, those skilled in the art can select the appropriate setting method according to different customer needs.

[0085] Reference Figure 3As shown, in one embodiment of this application, a guide hole 12 is formed in the height direction of the frame 1. The drive part 51 is movably disposed in the guide hole 12 and extends upward from the top of the guide hole 12. The guide hole 12 is provided to restrict the drive part 51 to move only along the height direction of the frame 1. The elastic member 54 is accommodated in the guide hole 12 and is sleeved on the outer periphery of the drive part 51. One end of the elastic member 54 is pressed against the upper surface of the protrusion formed on the outer periphery of the drive part 51, and the other end is pressed against the top wall of the guide hole 12.

[0086] In this embodiment, as Figure 3 As shown, the upper end of the guide hole 12 has a hole that communicates with the outside. This hole is used to allow the drive unit 51 to extend outward from the guide hole 12. The size of the hole is matched with the size of the drive unit 51, thereby guiding the drive unit 51 to move in the height direction of the frame 1.

[0087] Reference Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, in one embodiment of this application, the first extrusion section 2 includes a rotating shaft 21, a mounting plate 22, and rollers 23. The rotating shaft 21 is rotatably mounted in the accommodating space 11. Two mounting plates 22 are spaced apart along the length of the rotating shaft 21 in the accommodating space 11, and both mounting plates 22 are coaxially fixedly connected to the rotating shaft 21. The rollers 23 extend along the length of the rotating shaft 21, and there are multiple rollers 23. The multiple rollers 23 are spaced apart around the rotating shaft 21, and the two ends of the rollers 23 are rotatably mounted to the mounting plates 22. Each roller 23 is equivalent to an extrusion member on the first extrusion section 2. When the rotating shaft 21 rotates in the accommodating space 11, the multiple rollers 23 successively contact the pump passing through the channel 4 and extrude the pump tube, thereby realizing the delivery of liquid.

[0088] In this embodiment, as Figure 7 , Figure 8 The roller 23 and the mounting plate 22 are rotatably assembled via the bearing 231. When the roller 23 contacts and squeezes the pump tube, it is subjected to contact friction from the pump tube, which makes it easier to rotate relative to the mounting plate 22, thereby reducing the degree of friction between the pump tube and the roller 23.

[0089] It is understandable that the driving source of the rotating shaft 21 can be a motor. The motor is arranged at a suitable position on the frame 1 and drives the rotating shaft 21 to rotate at a preset speed. Then, multiple rollers 23 successively contact the pump pipe passing through the channel 4 and squeeze it to realize the delivery of liquid.

[0090] Reference Figure 7As shown, in one embodiment of this application, the rotating mounting portions of the rollers 23 and the mounting plates 22 are spaced apart from each other, so that a compression space 24 is formed between the two mounting plates 22 on the side of the plurality of rollers 23 facing away from the rotating shaft 21; as Figure 8 As shown, the second extrusion section 3 has a cover section 33 extending into the extrusion space 24 on the side facing the first extrusion section 2, so that a channel 4 is formed between the cover section 33 and the roller 23.

[0091] In this embodiment, as Figure 3 As shown, when the cover plate 31 is placed over the opening, the cover portion 33 connected to the bottom of the cover plate 31 extends into the compression space 24 and forms a channel 4 with the multiple rollers 23. The pump pipe passing through the channel 4 abuts against the cover portion 33 on one side and against the rollers 23 on the other side. Thus, when the rotating shaft 21 rotates in the receiving space 11, the multiple rollers 23 that rotate synchronously with the rotating shaft 21 contact the pump pipe in sequence and compress the pump pipe, thereby realizing the liquid transportation process.

[0092] In this embodiment, as Figure 6 As shown, in order to enable the side of the cover 33 facing the roller 23 to better cooperate with the rotating roller 23, the side of the cover 33 facing the roller 23 is set as an arc-shaped surface 331, thereby enabling better compression of the pump pipe passing through the channel 4.

[0093] Reference Figure 2 As shown, in one embodiment of this application, the peristaltic pump further includes a rotary motor 61 and a synchronous pulley set 62; wherein, the rotary motor 61 is mounted on the frame 1; the synchronous pulley set 62 includes two synchronous belts 621 and one synchronous belt 621, one of which is coaxially connected to the rotating shaft 21, and the other synchronous belt 621 is coaxially connected to the output shaft of the rotary motor 61, thereby realizing that when the rotary motor 61 rotates at a preset speed, the synchronous pulley set 62 drives the rotating shaft 21 to rotate at a preset speed within the accommodating space 11.

[0094] In this embodiment, as Figure 9 As shown, it also includes a three-way valve 8 connected to each pump pipe. The three-way valve 8 has an outlet 83, a first inlet 81, and a second inlet 82. One of the first inlet 81 and the second inlet 82 is used to connect to the pipe for conveying liquid, and the other is used to connect to the cleaning pipe. The outlet 83 is connected to the pump pipe. When liquid needs to be conveyed, the three-way valve 8 is controlled to connect the pump pipe to the pipe for conveying liquid. When the pump pipe needs to be cleaned, the three-way valve 8 is controlled to connect the pump pipe to the pipe for cleaning, which greatly improves the convenience of use for users.

[0095] In this embodiment, the three-way valve 8 can be electronic or mechanical, and multiple three-way valves 8 are fixedly installed on the frame 1 at appropriate positions. Since the three-way valve 8 is a commonly used valve structure in the prior art, its structure and working principle will not be described in detail here.

[0096] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A peristaltic pump, characterized in that, include: The frame has a receiving space formed inside it, and the upper part of the receiving space has an opening that communicates with the outside. The first extrusion section is rotatably arranged within the accommodating space; The second extrusion section is movably arranged on the top of the frame and covers the opening. The second extrusion section is spaced above the first extrusion section so that the space between the first extrusion section and the second extrusion section forms a channel for passing through the pump pipe. as well as A driving component is provided on the frame and is connected to the second extrusion part. The driving component is used to control the movement of the second extrusion part relative to the first extrusion part to adjust the distance between the first extrusion part and the second extrusion part.

2. The peristaltic pump as described in claim 1, characterized in that, The drive unit has a drive section that moves along the height direction of the frame; One end of the second extrusion part is rotatably mounted on the top of the frame, and the other end is movably connected to the drive part; The drive unit moves along the height direction of the frame to adjust the distance between the first extrusion unit and the second extrusion unit.

3. The peristaltic pump as described in claim 2, characterized in that, The second extrusion section includes: A cover plate is placed over the opening, with one end of the cover plate rotatably mounted on the top of the frame. The space between the cover plate and the first pressing part forms the channel. A connector is provided on the cover plate, and at least part of the upper end of the drive unit extends upward from the frame, and one end of the drive unit extending out of the frame is connected to the connector; The drive unit moves along the height direction of the frame and drives the cover plate to rotate relative to the first extrusion unit through the connector, so as to adjust the distance between the first extrusion unit and the second extrusion unit.

4. The peristaltic pump as described in claim 3, characterized in that, The connector includes: A wrench, movably mounted on the cover plate, the wrench having a locking position against the top of the cover plate and an unlocking position that is removed from the top of the cover plate; and A connecting rod, one end of which is rotatably connected to the wrench and the other end of which is rotatably connected to the drive unit; In the height direction of the frame, the wrench is in the locked position. The drive unit drives the wrench to move down through the connecting rod, which drives the cover plate to rotate toward the first pressing part. The drive unit drives the wrench to move up to a preset position through the connecting rod, and drives the wrench to rotate relative to the cover plate, so that the wrench moves from the locked position to the unlocked position.

5. The peristaltic pump as described in claim 4, characterized in that, In the height direction of the frame, the cover plate is provided with a through hole at the corresponding position of the drive unit, and one end of the drive unit extending upward from the frame is placed in the through hole; At least a portion of the bottom of the connecting rod extends into the through hole, and the through hole is open at one end away from the rotation axis of the cover plate, for driving the wrench from the locked position to the unlocked position when the drive part moves up to the preset position.

6. The peristaltic pump according to any one of claims 2-5, characterized in that, The driving component includes: A linear motor, mounted on the frame, the linear motor having a lifting part movable along the height direction of the frame; and The abutting part, in the height direction of the frame, has one end fixedly connected to the lifting part and the other end pressed against the bottom of the driving part; The elastic element can undergo elastic deformation along the height direction of the frame. One end of the elastic element is connected to the drive unit, and the other end is connected to the frame.

7. The peristaltic pump as claimed in claim 6, characterized in that, In the height direction of the frame, a guide hole is formed in the frame, the drive unit is movably disposed in the guide hole, and the drive unit extends upward from the top of the guide hole; The elastic element is housed in the guide hole and is sleeved on the outer periphery of the drive part; one end of the elastic element is pressed against the drive part and the other end is pressed against the top wall of the guide hole.

8. The peristaltic pump as claimed in claim 1, characterized in that, The first extrusion section includes: The rotating shaft is rotatably mounted within the receiving space; and The mounting plate is provided in two parts, and the two mounting plates are coaxially mounted on the rotating shaft, and the two mounting plates are arranged at intervals along the length direction of the rotating shaft. Rollers extend along the length of the rotating shaft. There are multiple rollers, which are arranged at intervals around the rotating shaft, and the two ends of the rollers are rotatably connected to the mounting plate.

9. The peristaltic pump as claimed in claim 8, characterized in that, The rollers and the rotating mounting parts of the mounting plates are spaced apart from each other on the outer peripheral edge of the mounting plates, so as to form a compression space between the two mounting plates on the side of the multiple rollers away from the rotating shaft; The second extrusion section has a cover portion extending into the extrusion space on the side facing the first extrusion section, so that the channel is formed between the cover portion and the roller.

10. The peristaltic pump as claimed in claim 8, characterized in that, The peristaltic pump also includes: A rotary motor, mounted on the frame; and A synchronous belt pulley assembly, one end of which is connected to the output shaft of the rotary motor and the other end of which is connected to the rotating shaft.

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