Peristaltic pump head

Abstract

This specification discloses a peristaltic pump head, comprising: a pump body, an upper pressure block, a roller assembly, a drive lever, a rotating component, and a rotating follower component. The upper pressure block and the roller assembly are located at the front end of the pump body. The movable plane of the drive lever is perpendicular to the plane of the upper pressure block. The rotating component and the rotating follower component are located at the rear end of the pump body. The rotating component connects the drive lever and the rotating follower component, and the rotating follower component drives the upper pressure block to move up and down. In this design, the drive lever is located on the side end face of the pump body, with its plane parallel to the roller shaft. Using a forward-moving drive lever saves space and improves the convenience and operability of opening the upper pressure block.

Description

Technical Field

[0001] This application relates to the field of peristaltic pump technology, and more particularly to a peristaltic pump head. Background Technology

[0002] A peristaltic pump works like squeezing a fluid-filled tube with your fingers; as you slide your fingers forward, the fluid moves forward. A peristaltic pump operates on the same principle, but instead of fingers, rollers are used. Fluid is pumped by alternately squeezing and releasing the pump's elastic delivery tube. Just like squeezing a tube with two fingers, as the fingers move, negative pressure is created inside the tube, causing the liquid to flow.

[0003] The peristaltic pump head is a crucial component of the peristaltic pump, serving as a mechanical device to continuously compress the hose and complete fluid transfer. A peristaltic pump head typically consists of an upper pressure block, a support, a body, and a roller assembly. The upper pressure block primarily compresses the hose; the support and body mainly secure the roller assembly. The roller assembly, as a continuously rotating component, continuously compresses the hose.

[0004] In peristaltic pump heads, if multiple channels need to be switched, a combination of multiple solenoid valves is typically used to control the on / off state of each channel. This method is relatively complex, and the number of solenoid valves required depends on the number of channels, increasing system costs. Moreover, for applications with limited space, multiple solenoid valves can result in excessive size. Furthermore, electromagnetic control methods are inaccurate in controlling the clamping force, exhibiting poor stability and reliability, and are prone to failure. Summary of the Invention

[0005] In view of this, embodiments of this application provide a peristaltic pump head for improving the stability of the switching device in the peristaltic pump head, reducing costs, and reducing the size of the switching device.

[0006] To solve the above-mentioned technical problems, the embodiments in this specification are implemented as follows:

[0007] This specification provides an embodiment of a peristaltic pump head, which includes: a pump body, an upper pressure block, a roller assembly, and a multi-channel switching device; the upper pressure block, the roller assembly, and the multi-channel switching device are disposed at the front end of the pump body, and the roller assembly is disposed between the upper pressure block and the multi-channel switching device;

[0008] The multi-channel switching device includes a rotating cam and a clamping block. The rotating cam is disposed in a groove in the pump body. At least two guide grooves are disposed around the groove. The clamping block is disposed in the guide groove. A fixing device for installing fluid pipeline is disposed outside the opening end of the guide groove. The opening end is a port of the guide groove away from the rotating cam. The clamping block passes through the opening end under the drive of the rotating cam to clamp the fluid pipeline.

[0009] Optionally, the guide groove includes a first guide groove and a second guide groove, the fluid pipeline includes a main pipeline and a connecting pipeline, the connecting pipeline is used to connect the inlet end and the outlet end of the main pipeline, the opening end of the first guide groove corresponds to the connecting pipeline, and the opening end of the second guide groove corresponds to the main pipeline.

[0010] Optionally, the connecting pipe is connected to the main pipe via a tee connector.

[0011] Optionally, the multi-channel switching device further includes a spring-back mechanism disposed in the guide groove, the spring-back mechanism being used to control the clamping block to move away from the fluid pipeline.

[0012] Optionally, the rebound mechanism includes a spring disposed between the clamping block and the end of the guide groove near the fluid conduit.

[0013] Optionally, the mounting plane of the fluid conduit is parallel to the rotation plane of the rotary cam.

[0014] Optionally, the multi-channel switching device can complete at least two working states: a first working state in which the connecting pipeline is cut off and the main pipeline is connected; and a second working state in which the main pipeline is cut off and the connecting pipeline is connected.

[0015] Optionally, the first guide groove is straight, the second guide groove is straight, and the included angle between the first guide groove and the second guide groove is less than or equal to 90 degrees.

[0016] Optionally, the front end of the clamping block is a smooth arc.

[0017] Optionally, the fixing device includes: a first fixing device and a second fixing device, wherein the first fixing device is disposed between the roller device and the rotating cam, and the second fixing device is connected to the first fixing device. 11. The peristaltic pump head as claimed in claim 10, wherein the relative position of the first fixing device and the roller device is adjustable.

[0018] Optionally, the pump body is provided with a slide rail, and the first fixed position can slide along the slide rail.

[0019] Optionally, the slide rail is arranged parallel to the side end face of the pump body, and the first fixed position is arranged parallel to the slide rail.

[0020] Optionally, the first fixing device includes: a support frame and a position locking mechanism. The pump body is provided with a rotation center, the support frame is rotatable around the rotation center, and the two ends of the support frame are respectively provided with limiting structures for fixing fluid pipelines. The position locking mechanism is disposed on the support frame and is used to limit the position of the support frame on the pump body.

[0021] Optionally, the position locking mechanism is movably connected to the pump body.

[0022] Optionally, the limiting structure includes: a pipe joint or a clamping device.

[0023] Optionally, one end of the support frame is hinged to the rotation center.

[0024] Optionally, the rotation center is a shaft-shaped structure or a spherical structure.

[0025] Optionally, when the rotation center is a rotating shaft, the support frame is connected to the rotating shaft via a bushing, and the bushing is provided with an opening.

[0026] Optionally, the position locking mechanism is a latch.

[0027] Optionally, the position locking mechanism includes a positioning pin and a positioning groove is provided on the pump body, and the positioning pin is used in conjunction with the positioning groove.

[0028] Optionally, the position locking mechanism further includes an elastic component for locking the positioning pin.

[0029] Optionally, the elastic component includes a spring.

[0030] Optionally, the peristaltic pump head further includes: a drive lever, a rotating component, and a rotating follower component; wherein, the upper pressure block is disposed at the front end of the pump body, the drive lever is disposed at the side end face of the pump body, the movable plane of the drive lever is perpendicular to the plane where the upper pressure block is located, and the rotating component and the rotating follower component are disposed at the rear end of the pump body; wherein, the rotating component is respectively connected to the drive lever and the rotating follower component, and the rotating follower component drives the upper pressure block to move up and down.

[0031] Optionally, the drive lever is connected to the rotating component via a rotating shaft, the drive lever is fixedly connected to the rotating shaft, and the rotating shaft is fixedly connected to the rotating component.

[0032] Optionally, the rotating component is an eccentric wheel.

[0033] Optionally, the rotating follower component includes a first sliding block, which has a U-shaped structure. The top of the first sliding block is connected to the rotating component, and both ends of the first sliding block are fixedly connected to the upper pressure block.

[0034] Optionally, a guide groove is provided on the pump body, and the first sliding block moves within the guide groove.

[0035] Optionally, the rotating follower component includes a connecting rod, the connecting rod being connected to the rotating component via a fixed shaft, and the connecting rod being connected to the upper pressure block. 30. The device as claimed in claim 29, wherein the rotating follower component further includes: a second sliding block, the second sliding block moving along a cylindrical guide under the action of the connecting rod, driving the upper pressure block to move up and down, wherein the cylindrical guide is fixedly connected to the pump body.

[0036] Optionally, there are two cylindrical guides, which are respectively inserted into the through holes at both ends of the second sliding block.

[0037] Optionally, the connecting rod includes a first connecting rod and a second connecting rod, which are arranged in parallel and connected to the upper pressure block respectively. A driver is provided in the gap between the first connecting rod and the second connecting rod, and the driver is connected to the roller device.

[0038] Optionally, a protrusion is provided on the second sliding block. The protrusion is rotatable around its own rotation center on the surface of the second sliding block. The protrusion is provided with a through hole that passes through the protrusion from the side. A round shaft is provided in the through hole, and the two ends of the round shaft are respectively connected to the first connecting rod and the second connecting rod.

[0039] Optionally, the upper pressure block position adjustment device further includes a spring locking device, which is used to adjust the relative position of the pump body and the upper pressure block.

[0040] A method for filling the fluid pipeline of a peristaltic pump head, the fluid pipeline including a main pipeline and a connecting pipeline, the connecting pipeline being used to connect the inlet end and the outlet end of the main pipeline;

[0041] The method includes:

[0042] Control the connection pipeline to close and the main pipeline to open, control the fluid to flow in from the inlet end and flow out from the outlet end to fill the main pipeline;

[0043] The main pipeline is closed and the connecting pipeline is opened, so that the fluid in the main pipeline flows back to the inlet end of the main pipeline through the connecting pipeline and fills the connecting pipeline.

[0044] The above-described at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0045] 1. The control of the fluid pipeline is integrated into the cam structure. Switching between pipeline states is achieved simply by rotating the cam at different angles. When switching between multiple fluid pipelines is required, only the number of clamping blocks needs to be increased and the shape of the rotating cam adjusted. This solution uses a mechanical mechanism instead of a solenoid valve for pipeline switching, which not only improves the stability and reliability of the switching device, reduces costs and the size of the device, but also saves on the length of the fluid pipeline, shortens the liquid's path within the pipeline, and thus reduces energy consumption in the power system.

[0046] 2. The mounting plane of the liquid pipeline is set parallel to the mounting plane of the rotary cam, making assembly simple.

[0047] 3. The positions of the fixing device and roller device provided in this solution are adjustable. When installing the hose, the fixing device can be adjusted to be closer to the roller device to facilitate hose installation onto the rollers. After the hose is installed, the fixing device can be adjusted to be further away from the roller device and secured using a position locking mechanism. This solution makes hose installation more convenient and simpler while ensuring the peristaltic pump hose remains taut.

[0048] 4. The drive rod of this design is set on the side end face of the pump body, so that the plane of the drive rod is parallel to the roller shaft core. By using the forward-moving drive rod, space can be saved, and the convenience and operability of opening the upper pressure block can be improved.

[0049] 5. The hose pressure guide in this solution adopts a cylindrical guide, which has high guiding accuracy and makes the hose pressure more stable.

[0050] 6. The connection between the connecting rod and the sliding block in this design is a hinge, which can reduce the precision requirements of the parts.

[0051] 7. The pump head in this solution uses spring pressure, which is adjustable and can adaptively tighten the hose wall thickness, thereby improving the transmission accuracy when the pump head is used for precise liquid transfer. Attached Figure Description

[0052] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0053] Figure 1 This is a schematic diagram of the structure of a peristaltic pump head according to one embodiment of the present specification.

[0054] Figure 2 for Figure 1 A three-dimensional structural diagram of the clamping block in the middle;

[0055] Figure 3a for Figure 1 A schematic diagram of a structure where both fluid pipelines are closed;

[0056] Figure 3b for Figure 1 A schematic diagram showing the structure with both fluid lines open;

[0057] Figure 3c for Figure 1 A schematic diagram of a two-way fluid pipeline where the upper path is closed and the lower path is open.

[0058] Figure 3d for Figure 1 A schematic diagram of a two-way fluid pipeline where the upper path is open and the lower path is closed.

[0059] Figure 4 A schematic diagram of the structure of a peristaltic pump head according to Embodiment 3 of this specification. Figure 1 ;

[0060] Figure 5 A schematic diagram of the structure of a peristaltic pump head according to Embodiment 3 of this specification. Figure 2 ;

[0061] Figure 6 A schematic diagram showing the position of the fixing device in conjunction with the hose during installation;

[0062] Figure 7 A schematic diagram showing the position of the fixing device in conjunction with the hose in a fixed state;

[0063] Figure 8 A schematic diagram showing the fit between the support frame and the center of rotation when the center of rotation is a sphere;

[0064] Figure 9 A schematic diagram showing the fit between the support frame and the center of rotation when the center of rotation is the ball bowl.

[0065] Figure 10 A front view of the upper pressure block position adjustment device of Embodiment Six of a peristaltic pump head provided in this specification when the upper pressure block is in the closed state;

[0066] Figure 11 This is a schematic diagram of the overall structure of the upper pressure block position adjustment device in Embodiment 6 when the upper pressure block is in the closed state;

[0067] Figure 12 This is a rear view of the upper pressure block in Example 6 when it is in the closed state;

[0068] Figure 13 This is a schematic diagram of the overall structure of the first sliding block;

[0069] Figure 14 A schematic diagram of the overall structure of the upper pressure block position adjustment device of a peristaltic pump head embodiment seven provided in this specification when the upper pressure block is in the closed state;

[0070] Figure 15 This is a rear view of the upper pressure block in Example 7 when it is in the closed state;

[0071] Figure 16 This is a side view of the upper pressure block position adjustment device in Embodiment 7 when the upper pressure block is in the closed state;

[0072] Figure 17 This is a schematic diagram of the overall structure of the upper pressure block position adjustment device in Embodiment 7 when the upper pressure block is in a semi-open state;

[0073] Figure 18 This is a schematic diagram of the overall structure of the upper pressure block position adjustment device in Embodiment 7 when the upper pressure block is in the fully open state;

[0074] Figure 19 This is a rear view of the upper pressure block position adjustment device in Embodiment 7 when the upper pressure block is in the fully open state;

[0075] Figure 20 A side view of an upper pressure block position adjustment device provided in the embodiments of this specification when the upper pressure block is in the fully open state;

[0076] Figure 21 This is a schematic flowchart illustrating a method for filling the fluid pipeline of a peristaltic pump head, as provided in an embodiment of this specification.

[0077] Reference numerals: 1-Pump body, 2-Rotary cam, 3-Clamping block, 4-Groove, 5-Guide groove, 6-Stop tube column, 7-Baffle, 8-First spring, 9-Roller device, 10-Spring hole, 11-Main pipeline, 12-Connecting pipeline, 13-Support frame, 14-Position locking mechanism, A-Positioning pin, B-Positioning groove, C-Handle cap, D-Second spring, 15-Hose limiting structure, 16-First rotating shaft, 17-Hose, 18-Upper pressure block, 19-Ball, 20-Ball cup, 21-Drive lever, 22-Rotating component, 23-First sliding block, 24-Second sliding block, 25-First connecting rod, 26-Second connecting rod, 27-Cylindrical guide, 28-Protrusion, 29-Round shaft, 30-Second rotating shaft, 31-Driver. Detailed Implementation

[0078] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0079] This specification provides a peristaltic pump head, including: a pump body, an upper pressure block, a roller device, and a multi-channel switching device; the upper pressure block, the roller device, and the multi-channel switching device are disposed at the front end of the pump body, and the roller device is disposed between the upper pressure block and the multi-channel switching device;

[0080] The multi-channel switching device includes a rotary cam and a clamping block. The rotary cam is disposed in a groove in the pump body, and at least two guide grooves are provided around the groove. The clamping block is disposed in the guide grooves, and a fixing device for installing fluid pipelines is provided outside the opening end of the guide groove. The opening end is a port of the guide groove away from the rotary cam. Driven by the rotary cam, the clamping block passes through the opening end to clamp the fluid pipeline.

[0081] The pump body can be understood as the mounting housing of a multi-channel switching device. It can be a flat plate structure, a housing, or an irregular three-dimensional structure. The pump body includes at least one operable plane.

[0082] A rotary cam can be understood as a cam that can rotate along a rotation axis, connected to a driver via a connecting shaft. Here, "cam" refers to a rotating or sliding component in a machine. In this design, the pump body, rotary cam, and clamping blocks constitute a cam mechanism. A cam mechanism is generally a higher-pair mechanism composed of three components: a cam, a follower, and a frame. In this design, the clamping block can be understood as the follower, and the pump body as the frame. The external profile of the rotary cam can be customized according to specific circumstances, and it is related to the number and orientation of the clamping blocks.

[0083] Here, the cam structure can be a single piece or a combination of multiple cams. Different cam structures can be combined depending on the pipeline configuration. Among them, the multi-layer cam structure is more adaptable and has a wider range of applications.

[0084] The guide groove can be configured into various shapes as needed, and the shapes of the guide groove and the clamping block complement each other. For example, the guide groove can be a regular shape or an irregular shape, such as a straight line, a curve, or a multi-layered structure. Correspondingly, the clamping block can be a general regular shape or a customized irregular shape.

[0085] The fixing device can be a device that restricts the fluid pipeline. Specifically, the fixing device can limit the degree of freedom of the fluid pipeline in the direction of movement of the clamping block, preventing the fluid pipeline from shifting. The fixing device can be a baffle, a pipe-stopping column, or a limiting groove, etc. Furthermore, the fixing device can be a single component or a combination of multiple components.

[0086] The fluid flowing through the fluid pipelines can be liquid, gas, or solid, or a mixture of any two. The fluid pipelines can be completely disconnected, partially connected, or fully connected, depending on actual needs.

[0087] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0088] Example 1:

[0089] like Figure 1 This is a structural schematic diagram of the main view of Embodiment 1. The peristaltic pump head includes: a pump body 1, an upper pressure block ( Figure 1 (Not shown in the image) Roller device 9 and multi-channel switching device; the upper pressure block, roller device 9 and multi-channel switching device are sequentially arranged at the front end of the pump body 1.

[0090] The multi-channel switching device includes a rotary cam 2 and a clamping block 3. The rotary cam 2 is disposed in a groove 4 of the pump body 1. At least two guide grooves 5 are disposed around the groove 4. The clamping block 3 is disposed in the guide groove 5. A fixing device for installing fluid pipeline is disposed outside the opening end of the guide groove 5. The opening end is a port of the guide groove 5 away from the rotary cam 2. The clamping block 3 passes through the opening end under the drive of the rotary cam 2 to clamp the fluid pipeline.

[0091] according to Figure 1 As can be seen, clamping block 3 is a component with a smooth arc at the front end, which can reliably clamp the fluid pipeline based on its front end structure. In order to achieve a more effective clamping state, this embodiment employs a dual-guide design for clamping block 3. For example... Figure 2 As shown, the clamping block 3 has a structure with protrusions at the top and bottom. The guide groove 5 is a two-layered groove. The first layer of the groove matches the largest outer dimension of the clamping block 3, and the second layer of the groove matches the bottom protrusion of the clamping block 3, forming a double guide to improve stability. In addition, the protrusion at the top of the clamping block 3 can cooperate with the groove on the end cap for guidance.

[0092] The guide groove 5 is open at one end near the rotating cam 2, specifically contacting the outer contour of the rotating cam 2; in order to accommodate the front end structure of the clamping block 3, the guide groove 5 is provided with an opening at the end away from the rotating cam 2, allowing the front end of the clamping block 3 to pass through, while the main structure cannot pass through.

[0093] To ensure that the clamping block 3 can quickly return to the guide groove 5 after being freed from the force of the rotating cam 2 without interfering with the fluid pipeline, this solution also provides a spring-back mechanism in the guide groove 5. The spring-back mechanism is used to control the clamping block 3 to move away from the fluid pipeline.

[0094] Specifically, the rebound mechanism can be a first spring 8, with a spring hole 10 provided in the clamping block 3. One end of the first spring 8 is in the spring hole 10, and the other end contacts one end of the guide groove 5. The first spring 8 can be fixedly connected to the clamping block 3 and the guide groove 5, or it can be loosely connected. However, when the clamping block 3 clamps the fluid pipeline, the first spring 8 is in a compressed state. A more preferred embodiment is that the first spring 8 is always in a compressed state and is always in contact with both the guide groove 5 and the clamping block 3.

[0095] The fixing device includes a baffle column 6 and a baffle 7. The fluid pipeline is installed in the gap between the baffle column 6 and the baffle 7 to ensure that the fluid pipeline does not move significantly in the radial direction. In other embodiments, the fixing device may only include the baffle column 6, which can... Figure 1 The baffle 7 in the middle is replaced with one or more baffle posts 6.

[0096] Furthermore, the mounting plane of the fluid pipeline is parallel to the rotation plane of the rotary cam 2. This means that the fluid pipeline is entirely mounted on the pump body 1, rather than traversing the body. This design reduces the size of the device and facilitates installation.

[0097] exist Figure 1 As can be seen, both guide grooves 5 are straight lines with an included angle of 90°. In other embodiments, the included angle between the two guide grooves 5 can be less than 90 degrees, which can limit the length of the pipeline to be relatively short or the overall volume to be relatively small.

[0098] in, Figures 3a-3d They described respectively Figure 1 Four different switching states for multiple channels. Figure 3a This is a state where both paths are closed. Figure 3b This means both channels are open. Figure 3c The top lane is closed and the bottom lane is open. Figure 3d This represents the state where the lower path is closed and the upper path is open. Different working states are achieved by adjusting the angle of the rotating cam 2.

[0099] Figures 3a-3d This diagram only shows how to control two fluid lines by rotating a cam. Based on this principle, multiple fluid lines can also be controlled by setting multiple guide grooves and multiple clamping blocks.

[0100] Furthermore, such as Figure 1 As shown, the two fluid circuits corresponding to the two guide grooves 5 are interconnected. Specifically, the fluid pipeline includes a main pipeline 11 and a connecting pipeline 12. The opening end of the first guide groove corresponds to the connecting pipeline 12, and the opening end of the second guide groove corresponds to the liquid outlet end of the main pipeline 11. The connecting pipeline 12 is used to connect the liquid inlet end and the liquid outlet end of the main pipeline 11.

[0101] The aforementioned multi-channel switching device can complete at least two working states: the first working state is that the main pipeline 11 is open and the connecting pipeline 12 is closed; the second working state is that the main pipeline 11 is closed and the connecting pipeline 12 is open.

[0102] The above-described pipeline design meets the high-precision requirements of peristaltic pump quantitative filling. To ensure that the volume of liquid filled each time is close to the set value, the starting position of the pump head can be kept the same for each filling operation. This ensures that the angle the pump head travels and its stopping position are identical each time, eliminating quantitative transmission errors caused by pulsation. Since each filling operation requires the pump head to rotate from the stopping position at the end of the previous filling operation to the set starting position, the fluid generated during this process cannot be used for filling. Therefore, the main pipeline 11 needs to be shut off to prevent fluid outflow, while the connecting pipeline 12 is opened to recover the fluid pumped in during this process. When the pump head reaches the set starting position, the main pipeline 11 is opened again, and the connecting pipeline 12 is shut off, allowing normal filling to proceed through the outlet of the main pipeline 11.

[0103] For connecting the main pipeline and the connecting pipeline, a tee connector can be used. Each interface uses one tee connector, and two tee interfaces are connected by a hollow pipe as the connecting pipeline.

[0104] This embodiment integrates the pipeline switching device within the pump head of the peristaltic pump. Compared to devices with the switching device located outside the pump head, this method results in a shorter fluid pipeline and higher integration, reducing the energy consumption of the actuator. Furthermore, using a mechanical structure instead of a solenoid valve for pipeline shut-off improves the stability and reliability of the device and reduces system costs.

[0105] Peristaltic pumps use a flexible tube as the chamber and transfer liquid by regularly squeezing the tube. During the squeezing process, the tube is stretched due to frictional resistance. This regular squeezing causes the tube inside the pump to be stretched, recover, and stretched again in a regular pattern. This characteristic reduces the lifespan of the tube, and after prolonged operation, tube buildup can occur at the outlet, causing significant fluctuations in the liquid volume of the peristaltic pump within its effective operating time.

[0106] To address the aforementioned issues, existing technologies employ a method of pre-tensioning the hose inside the pump head to prevent frictional resistance from interfering with the hose's condition, thereby optimizing the peristaltic pump's operating state.

[0107] Existing methods for pre-tightening hoses include the following two: First, the hose inside the peristaltic pump is cut to a fixed length, then tightened, and secured with a blocking device. Because the hose inside the peristaltic pump is constantly in regular motion, this method easily leads to abnormal wear at the clamping point, and the blocking device also obstructs liquid flow. Second, the hose inside the peristaltic pump is cut to a fixed length, then connected in series with a pipe fitting, and the fitting is secured with a blocking device. This method can avoid abnormal wear at the pipe clamping point.

[0108] However, both of the above pre-tensioning methods have the problem of difficult hose installation, especially when the pump head and hose are large.

[0109] To address the aforementioned problems, this embodiment provides a solution by designing the hose fixing device to be movable, allowing adjustment of the relative position between the fixing device and the roller device. The hose fixing device can be movable as a whole or partially movable, as long as the distance between the fixing device and the roller device can be shortened.

[0110] Example 2

[0111] This embodiment provides a solution for a fixing device that can move in parallel. The fixing device can be divided into two parts: a first fixing device and a second fixing device. The first fixing device is disposed between the roller device and the rotating cam, and the second fixing device is connected to the first fixing device. The second fixing device and the first fixing device can be configured to share a single pipe joint, and the second fixing device also includes a pipe stop post.

[0112] In one embodiment, the pump body 1 can be a cubic shell, with a fixing device and a roller device installed at the front end of the pump body 1. A slide rail is provided on the pump body 1, parallel to the side end face of the pump body 1. The first fixing position is parallel to the slide rail and can slide on the slide rail.

[0113] Example 3

[0114] Unlike Embodiment 2, the first fixing device provided in this embodiment has a support frame that can rotate around a rotation center, thereby adjusting the distance between the fixing device and the roller. When installing the hose, the distance between the first fixing device and the roller can be adjusted to facilitate the installation of the hose onto the roller. After the hose is installed, a position locking mechanism is used for fixation. This solution makes hose installation more convenient and simpler while ensuring the peristaltic pump hose is taut.

[0115] like Figure 4 and Figure 5 As shown, the first fixing device includes: a support frame 13, a position locking mechanism 14, and a hose limiting structure 15.

[0116] A first rotating shaft 16 is provided on the pump body 1, and a bushing is provided at the rear end of the support frame 13. Figure 4 (Not shown in the diagram), the bushing is hinged to the first rotating shaft 16, allowing the support frame 13 to rotate about the first rotating shaft 16 along the plane of the pump body 1. Optionally, the bushing may also have an opening for easy installation and disassembly.

[0117] The support frame 13 has hose limiting structures 15 at both ends for fixing hoses, and for installing hoses 17 of a fixed length. The hose limiting structures 15 both fix and limit the hoses 17. The hose limiting structures 15 can be pipe fittings. The hose limiting structures 15 can be repeatedly operated.

[0118] The position locking mechanism 14 is mounted on the support frame 13, typically located on the outer edge of the support frame 13. The position locking mechanism 14 is used to limit the position of the support frame 13 on the pump body 1 during operation. The position locking mechanism 14 is movably connected to the pump body 1, facilitating repeated installation and removal of the hose 17.

[0119] In this embodiment, the position locking mechanism 14 adopts the following... Figure 6 and Figure 7 The locating pin A and locating groove B are shown. During hose installation, the positional relationship between locating pin A and locating groove B is as follows: Figure 6 As shown, the locating pin A contacts the surface of the pump body 1. When the hose is installed and the support frame 13 is fixed, the locating pin A is inserted into the locating groove B, as shown. Figure 7 As shown, the second spring D can be used to self-lock the positioning pin A. When it is necessary to disassemble the support frame 13, the handle cap C can be lifted, and the positioning pin A will disengage from the positioning groove B. Then, the support frame 13 can be rotated away from the positioning position of the positioning groove B, and then the support frame 13 can be lifted from the first rotating shaft 16 in a direction away from the pump body 1.

[0120] in, Figure 4 The state of the mid-position locking mechanism 14 corresponds to Figure 6 The position of the locating pin A relative to the pump body 1 is shown. Figure 5 The state of the mid-position locking mechanism 14 corresponds to Figure 7 The position of the locating pin A relative to the pump body 1 is shown.

[0121] Example 4

[0122] Unlike Embodiment 3, the position locking mechanism 14 is a screw, and the pump body 1 has a threaded hole. The screw engages with the threaded hole. When the screw is rotated to the position of the threaded hole, rotating the screw locks it in place using the threaded hole, thereby fixing the support frame 13. The screw is movably connected within the support frame 13 and can rotate within it.

[0123] Example 5

[0124] Unlike Embodiment 3, the rotation center in this embodiment is a spherical structure, wherein the fit between the rotation center and the support frame can be achieved by... Figure 8 and Figure 9 The mating structure shown.

[0125] like Figure 8 As shown, when the center of rotation is ball 19, one end of the support frame 13 rotates around the ball via ball cup 20. At this time, the first fixing device is in a non-removable state. When installing the hose 17, the support frame 13 can be rotated to a position that facilitates installation. After installation, rotate the support frame 13 to bring it closer to the roller device 9 of the pump head. Because a high-pair connection between ball cup 20 and ball 19 is used, the support frame 13 can be closer to the roller device 9, making installation easier. Then, rotate the support frame 13 to the set position and lock it using the position locking mechanism.

[0126] like Figure 9 As shown, when the rotation center is the ball cup 20, one end of the support frame rotates within the ball cup 20 via the ball 19. At this time, the first fixing device is in a non-removable state. When installing the hose 17, the support frame 13 can be rotated to a position convenient for installation. After installation, the support frame 13 is rotated to bring it closer to the roller device 9 of the pump head. Since a high-pair connection between the ball cup 20 and the ball 19 is used, the support frame 13 can be closer to the roller device 9, making installation easier. Then, the support frame 13 is rotated to the set position and locked by the position locking mechanism 14. In order to facilitate fixing the support frame 13 to the pump body 1, an opening can be provided on one side of the ball cup 20. When the support frame 13 is placed parallel to the pump body 1, the support frame 13 can pass through the ball cup 20 through this opening.

[0127] In existing technologies, the upper pressure block is often adjusted by a lever structure when the hose is pressed and tightened. The lever structure is often perpendicular to the axis of the roller core, which requires a large lever movement space when the pump head is installed, affecting the compactness of the equipment.

[0128] To address the aforementioned issues, this application arranges the lever structure on the side of the pump body, with the movable plane of the drive lever perpendicular to the plane of the upper pressure block. This makes the movable plane of the lever structure parallel to the roller shaft core, and uses a forward rotation drive lever, eliminating the need for additional moving space and saving space.

[0129] This specification provides an embodiment of an upper pressure block position adjustment device, comprising: a drive lever, a rotating component, and a rotating follower component; wherein the upper pressure block is disposed at the front end of the pump body, the drive lever is disposed at the side end face of the pump body, the movable plane of the drive lever is perpendicular to the plane where the upper pressure block is located, and the rotating component and the rotating follower component are disposed at the rear end of the pump body; wherein the rotating component is connected to the drive lever and the rotating follower component respectively, and the rotating follower component drives the upper pressure block to move up and down.

[0130] In this context, a rotary follower can be understood as a component whose position changes as the rotary component rotates. The rotary follower can be fixedly connected to the rotary component or it can be movably connected. The rotary follower can be a slider, a connecting rod, or a combination of both.

[0131] Example 6

[0132] like Figure 11-12 As shown, the peristaltic pump head includes a drive lever 21, a rotating component 22, and a first sliding block 23. The upper pressure block 18 is located at the front end of the pump body 1, and the drive lever 21 is located on the side end face of the pump body 1. The movable plane of the drive lever 21 is perpendicular to the upper pressure block 18, that is, the movable plane of the drive lever 21 is parallel to the shaft of the roller device 9. The rotating component 22 and the first sliding block 23 are located at the rear end of the pump body 1. The rotating component 22 is connected to the drive lever 21, and the first sliding block 23 is fixedly connected to the upper pressure block 18. A guide groove is provided on the pump body 1 at the position corresponding to the upper pressure block 18, and the first sliding block 23 drives the upper pressure block 18 to move up and down in the guide groove.

[0133] The drive lever 21 is connected to the rotating component 22 via a second rotating shaft 30. The drive lever 21 is fixedly connected to the second rotating shaft 30, and the second rotating shaft 30 is fixedly connected to the rotating component 22. The drive lever 21 drives the second rotating shaft 30 to rotate, thereby causing the rotating component 22 to rotate.

[0134] Among them, such as Figure 13 As shown, the first sliding block 23 has a U-shaped structure, with its two ends connected to the upper pressure block 18, and its top contacting the rotating component 22. Optionally, the top of the first sliding block 23 can be configured as a receiving cavity, and the rotating component 22 can be placed in the receiving cavity. When the rotating component 22 is an eccentric wheel, the axial direction of the eccentric wheel is perpendicular to the thickness direction of the first sliding block 23.

[0135] The gap between the upper pressure block 18 and the roller device 9 is used for installing the hose. The gap between the upper pressure block 18 and the roller device 9 is adjusted by the drive lever 21. When installing or removing the hose, the drive lever 21 is rotated to move the upper pressure block 18 away from the roller device 9. When the hose is installed, the drive lever 21 is rotated again to move the upper pressure block 18 closer to the roller device 9, and the hose is pressed tightly by the upper pressure block 18.

[0136] This design converts circular motion into linear motion by setting up a rotating component 22 and a first sliding block 23. Furthermore, by placing the drive lever 21 on the side end face of the pump body 1, it is ensured that the plane of the drive lever 21 is parallel to the axis of the roller device 9. Compared to a design where the lever and roller axis are perpendicular, using a forward-rotating drive lever 21 eliminates the need for additional space, thus saving space.

[0137] Example 7:

[0138] like Figures 14-16 As can be seen, unlike Embodiment Six, the peristaltic pump head includes a drive lever 21, a rotating component 22, a first connecting rod 25, and a second connecting rod 26, wherein the upper pressure block 18 is disposed at the front end of the pump body 1 (e.g., Figure 10 As shown, the drive lever 21 is located on the side end face of the pump body 1. The plane of the drive lever 21 is parallel to the shaft of the roller device 9. The rotating component 22 and the first connecting rod 25 and the second connecting rod 26 are located at the rear end of the pump body 1. The rotating component 22 is fixedly connected to the drive lever 21, the first connecting rod 25 and the second connecting rod 26 respectively. The first connecting rod 25 and the second connecting rod 26 change position as the rotating component 6 rotates, thereby driving the upper pressure block 18 to move up and down.

[0139] The gap between the upper pressure block 18 and the roller device 9 is used for installing the hose 17. The gap between the upper pressure block 18 and the roller device 9 is adjusted by the drive lever 21. When installing or removing the hose 17, the drive lever 21 is rotated to move the upper pressure block 18 away from the roller device 9. After the hose 17 is installed, the drive lever 21 is rotated again to move the upper pressure block 18 closer to the roller device 9 (e.g., ...). Figure 10 As shown), the upper pressure block 18 presses the hose 17 tightly.

[0140] This design converts circular motion into linear motion by setting up a rotating component 22, a first connecting rod 25, and a second connecting rod 26. Furthermore, by placing the drive lever 21 on the side end face of the pump body 1, it is ensured that the plane of the drive lever 21 is parallel to the axis of the roller device 9. Compared to a design where the lever and roller axis are perpendicular, using a forward-rotating drive lever 21 eliminates the need for additional space, thus saving space.

[0141] like Figure 15-16 As shown, the drive lever 21 and the rotating component 22 are connected via a second rotating shaft 30. The drive lever 21 is fixedly connected to the second rotating shaft 30, and the second rotating shaft 30 is fixedly connected to the rotating component 22. The drive lever 21 drives the second rotating shaft 30 to rotate, thereby causing the rotating component 22 to rotate. Figure 17 This is a schematic diagram showing the upper pressure block in a half-open state. Figure 18 This is a schematic diagram showing the upper pressure block in the fully open state. A limiting mechanism for the drive lever 21 is provided on the side end face of the pump body 1 to limit the range of motion of the drive lever 21. The specific position of the limiting mechanism can be determined based on the range of motion of the upper pressure block 18.

[0142] In some embodiments, the rotating component 22 may be an eccentric wheel.

[0143] In some embodiments, the first link 25, the second link 26, and the rotating component 22 are connected via a fixed shaft. The first link 25 and the second link 26 have an "L"-shaped structure, including a long side and a short side. The short side is connected to the rotating component 22 via the fixed shaft, and the long side is connected to the upper pressure block 18. When the rotating component 22 is an eccentric wheel, as the eccentric wheel rotates through different angles, the long sides of the first link 25 and the second link 26 will drive the upper pressure block 18 to move up and down. During this movement, the positions of the first link 25 and the second link 26 will change. Figure 16 When the upper pressure block 18 is in the closed state, the first connecting rod 25 and the second connecting rod 26 are in contact with the pump body 1. When the upper pressure block 18 is in the fully open state, as... Figure 20 As shown, the first connecting rod 25 and the second connecting rod 26 are separated from the pump body 1.

[0144] In this embodiment, to increase transmission stability, two linkage mechanisms are configured: a first linkage 25 and a second linkage 26, which are arranged in parallel. Correspondingly, two rotating components 22 can also be configured, with one rotating component 22 connected to one linkage. A driver 31 is configured in the gap between the two linkage mechanisms, and the driver 31 is connected to the roller device 9 to drive the roller device 9 to rotate. It should be noted that two linkages are a preferred configuration, but one linkage and one rotating component can also be used.

[0145] In some embodiments, the upper pressure block 18 is fixedly connected to the second sliding block 24, and the second sliding block 24 is positioned at the rear end of the pump body 1 corresponding to the position of the upper pressure block 18. The second sliding block 24 is connected to the first connecting rod 25 and the second connecting rod 26, and moves along the cylindrical guide under the action of the first connecting rod 25 and the second connecting rod 26, thereby driving the upper pressure block 18 to move up and down. The cylindrical guide is fixedly connected to the pump body 1. Two cylindrical guides can be provided, each passing through a through hole at one end of the second sliding block 24.

[0146] This embodiment uses a cylinder for guidance, which provides high guidance accuracy and features dual guidance, thereby improving the stability of the transmission.

[0147] Since the transmission is achieved using two connecting rods (first connecting rod 25 and second connecting rod 26), if these two connecting rods (first connecting rod 25 and second connecting rod 26) were directly fixed to the second sliding block 24, perfect symmetry would be impossible due to manufacturing errors. Therefore, the uneven force on the two connecting rods would damage the structure. In some embodiments, a protrusion 28 can be provided on the second sliding block 24. The protrusion 28 can rotate around its own rotation center on the surface of the second sliding block 24, meaning it has a degree of rotational freedom. A through hole is provided in the protrusion 28, extending from the side. A pivot 29 is provided in the through hole, with its two ends connected to the two connecting rods respectively. The protrusion 28 and pivot 29 can balance the uneven force on the two connecting rods.

[0148] In this embodiment, the linkage mechanism and the sliding block are hinged, which can reduce the precision requirements of the parts.

[0149] In some embodiments, the upper pressure block position adjustment device further includes a spring locking device, which is used to adjust the relative position of the pump body 1 and the upper pressure block 18. In this embodiment, the pump head is pressed down by a spring, and the spring pressure is adjustable. This allows for adaptive compression of the hose wall thickness, which can improve the transmission accuracy when the pump head is used for precise liquid transmission.

[0150] Example 8

[0151] This embodiment also provides a method for filling the fluid pipeline of a peristaltic pump head. The fluid pipeline includes a main pipeline and a connecting pipeline, wherein the connecting pipeline is used to connect the inlet and outlet ends of the main pipeline. Specific apparatus can be found in [reference needed]. Figure 1 .

[0152] like Figure 21 As shown, the method may include:

[0153] Step 810: Control the connection pipeline to close and the main pipeline to open, control the fluid to flow in from the inlet end and flow out from the outlet end to fill the main pipeline;

[0154] Step 820: Control the main pipeline to close and the connecting pipeline to open, so that the fluid in the main pipeline flows back to the inlet end of the main pipeline through the connecting pipeline and fills the connecting pipeline.

[0155] Step 810 is used to fill the main pipeline, and step 820 is used to fill the connecting pipeline. Steps 810 and 820 can be executed once or multiple times until the main pipeline and connecting pipeline are completely filled.

[0156] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0157] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A peristaltic pump head, characterized in that, The peristaltic pump head includes: a pump body, an upper pressure block, a roller assembly, a drive lever, a rotating component, and a rotating follower component; wherein, the upper pressure block and the roller assembly are disposed at the front end of the pump body, the drive lever is disposed at the side end face of the pump body, the movable plane of the drive lever is perpendicular to the plane where the upper pressure block is located, and the movable plane of the drive lever is parallel to the axis of the roller assembly, the rotating component and the rotating follower component are disposed at the rear end of the pump body; wherein, the rotating component is connected to the drive lever and the rotating follower component respectively, and the rotating follower component drives the upper pressure block to move up and down; The rotating follower component includes a connecting rod, which is connected to the rotating component via a fixed shaft and is also connected to the upper pressure block. The rotating follower component further includes a second sliding block, which moves along a cylindrical guide under the action of the connecting rod, thereby driving the upper pressure block to move up and down. The cylindrical guide is fixedly connected to the pump body.

2. The peristaltic pump head as described in claim 1, characterized in that, The drive lever is connected to the rotating component via a rotating shaft, the drive lever is fixedly connected to the rotating shaft, and the rotating shaft is fixedly connected to the rotating component.

3. The peristaltic pump head as described in claim 1, characterized in that, There are two cylindrical guides, which are respectively inserted into the through holes at both ends of the second sliding block.

4. The peristaltic pump head as described in claim 1, characterized in that, The connecting rod includes a first connecting rod and a second connecting rod, which are arranged in parallel and are respectively connected to the upper pressure block. A driver is provided in the gap between the first connecting rod and the second connecting rod, and the driver is connected to the roller device.

5. The peristaltic pump head as described in claim 4, characterized in that, A protrusion is provided on the second sliding block. The protrusion can rotate around its own rotation center on the surface of the second sliding block. The protrusion is provided with a through hole that passes through the protrusion from the side. A round shaft is provided in the through hole, and the two ends of the round shaft are respectively connected to the first connecting rod and the second connecting rod.

6. The peristaltic pump head as described in claim 1, characterized in that, The peristaltic pump head also includes a spring locking device, which is used to adjust the relative position of the pump body and the upper pressure block.

7. The peristaltic pump head as described in claim 1, characterized in that, The peristaltic pump head also includes a multi-channel switching device; the multi-channel switching device is disposed at the front end of the pump body, and the roller device is disposed between the upper pressure block and the multi-channel switching device; The multi-channel switching device includes a rotating cam and a clamping block. The rotating cam is disposed in a groove in the pump body. At least two guide grooves are disposed around the groove. The clamping block is disposed in the guide groove. A fixing device for installing fluid pipeline is disposed outside the opening end of the guide groove. The opening end is a port of the guide groove away from the rotating cam. The clamping block passes through the opening end under the drive of the rotating cam to clamp the fluid pipeline.

8. The peristaltic pump head as described in claim 7, characterized in that, The guide groove includes a first guide groove and a second guide groove. The fluid pipeline includes a main pipeline and a connecting pipeline. The connecting pipeline is used to connect the inlet end and the outlet end of the main pipeline. The opening end of the first guide groove corresponds to the connecting pipeline, and the opening end of the second guide groove corresponds to the main pipeline.

9. The peristaltic pump head as described in claim 7, characterized in that, The multi-channel switching device also includes a spring-back mechanism disposed in the guide groove, which is used to control the clamping block to move away from the fluid pipeline.

10. The peristaltic pump head as described in claim 7, characterized in that, The mounting plane of the fluid pipeline is parallel to the rotation plane of the rotary cam.

11. The peristaltic pump head as described in claim 8, characterized in that, The first guide groove is straight, the second guide groove is straight, and the included angle between the first guide groove and the second guide groove is less than or equal to 90 degrees.

12. The peristaltic pump head as described in claim 7, characterized in that, The fixing device includes a first fixing device and a second fixing device, wherein the first fixing device is disposed between the roller device and the rotating cam, the second fixing device is connected to the first fixing device, and the relative position of the first fixing device and the roller device can be adjusted.

13. The peristaltic pump head as described in claim 12, characterized in that, The pump body is provided with a slide rail, and the first fixing device can slide along the slide rail. The slide rail is arranged parallel to the side end face of the pump body, and the first fixing device is arranged parallel to the slide rail.

14. The peristaltic pump head as described in claim 12, characterized in that, The first fixing device includes a support frame and a position locking mechanism. The pump body is provided with a rotation center, the support frame is rotatable around the rotation center, and the two ends of the support frame are respectively provided with limiting structures for fixing fluid pipelines. The position locking mechanism is disposed on the support frame and is used to limit the position of the support frame on the pump body. The position locking mechanism is movably connected to the pump body.

15. The peristaltic pump head as described in claim 14, characterized in that, One end of the support frame is hinged to the rotation center, which is an axial structure or a spherical structure.

16. The peristaltic pump head as described in claim 14, characterized in that, When the rotation center is a rotating shaft, the support frame is connected to the rotating shaft through a bushing, and the bushing is provided with an opening.

17. The peristaltic pump head as described in claim 14, characterized in that, The position locking mechanism includes a positioning pin and a positioning groove is provided on the pump body. The positioning pin is used in conjunction with the positioning groove.

18. The peristaltic pump head as described in claim 17, characterized in that, The position locking mechanism also includes an elastic component for locking the positioning pin.

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