A peristaltic pump head

Abstract

The embodiments of this specification disclose a peristaltic pump head, comprising a pump body, a transmission unit, an extrusion unit, and an upper pressure block. The upper pressure block is detachably connected to the pump body. The upper pressure block and the pump body are used to fix a hose. The pump body is provided with the extrusion unit and the transmission unit in sequence from top to bottom. The extrusion unit includes a plurality of extrusion components. The transmission unit is provided with a plurality of transmission components corresponding to the extrusion component. The transmission components drive the corresponding extrusion components to press the hose. This solution not only extends the service life of the hose, stabilizes the flow rate, and reduces the attenuation amplitude, but also enables the transmission of different flow rates between multiple channels on the same pump head. It is applicable to hoses of different diameters and wall thicknesses. The overall structural design is reasonable, easy to use, and highly practical.

Description

Technical Field

[0001] The present invention relates to the technical field of peristaltic pumps, and in particular to a peristaltic pump head. Background Art

[0002] Currently, the most common peristaltic pumps on the market are those that use a rotating roller to squeeze a flexible tube to deliver fluid. This is like pinching a fluid-filled hose with your fingers; as your fingers slide forward, the fluid moves forward. Peristaltic pumps operate on the same principle, but with rollers replacing fingers. The fluid is pumped by alternately squeezing and releasing the pump's flexible delivery hose.

[0003] Peristaltic pump flow rate adjustment can only be achieved by changing the rotational speed and tube diameter. This is especially true for multi-channel peristaltic pumps. To achieve different flow rates in different channels, different tube diameters must be used, resulting in inconsistent tube diameters across the entire delivery system. The roller structure of a rotary peristaltic pump head exerts both radial pressure and axial shear force on the hose, shortening its lifespan and significantly reducing flow rate. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A peristaltic pump head provided in an embodiment of the present specification includes: a pump body, a transmission unit, an extrusion unit and an upper pressure block, wherein the upper pressure block is detachably connected to the pump body, and the upper pressure block and the pump body are used to fix a hose, and the extrusion unit and the transmission unit are sequentially arranged inside the pump body from top to bottom, the extrusion unit includes a plurality of extrusion components, and the transmission unit is correspondingly provided with a plurality of transmission components, and the transmission components drive the corresponding extrusion components to press the hose.

[0006] Optionally, the contact area between the extrusion component and the hose can be changed under the drive of the transmission component.

[0007] Optionally, the transmission unit includes a first transmission component, a second transmission component and a third transmission component, the second transmission component includes a main shaft and several working pressure block cams installed on the main shaft, the first transmission component includes an inlet shaft and several inlet valve cams installed on the inlet shaft, and the third transmission component includes an outlet shaft and several outlet valve cams installed on the outlet shaft.

[0008] Optionally, the second transmission component also includes a main shaft drive gear installed on the main shaft, the first transmission component also includes an inlet gear installed on the inlet shaft, and the third transmission component also includes an outlet gear installed on the outlet shaft, and the main shaft drive gear is respectively engaged with the inlet gear and the outlet gear for transmission.

[0009] Optionally, the extrusion unit includes at least three extrusion components, the first extrusion component includes a first pushing component and an inlet valve connected to the top of the first pushing component, and the first pushing component can push the inlet valve up and down under the drive of the first transmission component; the second extrusion component includes a second pushing component and a working pressure block connected to the top of the second pushing component, and the second pushing component can push the working pressure block up and down under the drive of the second transmission component; the third extrusion component includes a third pushing component and an outlet valve connected to the top of the third pushing component, and the third pushing component can push the outlet valve up and down under the drive of the third transmission component.

[0010] Optionally, a guide sleeve seat is fixedly connected to the inner wall of the pump body, and several guide sleeves are installed on the guide sleeve seat. The first pushing assembly includes a push rod, a guide shaft and a reset spring. The guide shaft and the guide sleeve are cooperatively connected. The bottom end of the guide shaft is connected to the push rod, and the top end of the guide shaft passes through the guide sleeve and is connected to the inlet valve. The guide shaft outer sleeve between the guide sleeve seat and the push rod is provided with the reset spring.

[0011] Optionally, the upper pressure block includes an upper pressure block base and an inlet valve limit plate, a working pressure block adjustable limit plate and an outlet valve limit plate installed on the upper pressure block base, and the inlet valve limit plate, the working pressure block adjustable limit plate and the outlet valve limit plate are respectively arranged corresponding to the inlet valve, the working pressure block and the outlet valve.

[0012] Optionally, the adjustable limit plate of the working pressure block includes a dovetail groove slider, a dovetail slide, a locking screw, a hollow bolt and an adjustment bolt. The dovetail groove slider and the dovetail slide form a linear slide group. The hollow bolt is connected to the upper pressure block base through a thread and the end face is against the upper end face of the dovetail slide. The adjustment bolt passes through the hollow bolt and is screwed on the threaded hole of the upper pressure block base. After the dovetail groove slider slides to the appropriate position, it is locked and fixed by the locking screw.

[0013] Optionally, the upper pressing block and the pump body are locked and connected via locking buckles, and the locking buckles are arranged on both sides of the upper pressing block.

[0014] Optionally, it also includes an adaptive clamping unit, which includes a pipe clamp and an adaptive spring. The top ends of the outer walls of the side plates on both sides of the pump body are symmetrically provided with sliding grooves downward. The pipe clamp can be slidably installed in the sliding grooves. The adaptive spring is connected between the bottom end of the pipe clamp and the bottom wall of the sliding groove. The top end of the pipe clamp is V-shaped, and a cover plate is fixed to the outside of the side plate. The cover plate is located outside the sliding groove.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] The peristaltic pump head of the present invention can be made into a multi-channel pump head, and each channel uses an inlet valve pressure block, a working pressure block and an outlet valve pressure block to squeeze the hose in sequence to achieve liquid transmission. By adopting a set of three gear shafts, the inlet valve cam, the working pressure block cam and the outlet valve cam are respectively installed on the three gear shafts, and the hose pipeline can be laid in a manner perpendicular to the main axis.

[0017] An independent upper pressure block is set in each channel, and the upper pressure block is adjustable. When using hoses with the same diameter, different flow rates can be achieved in each channel by adjusting the adjustable structure of the upper pressure block. It is suitable for hoses with different diameters and different wall thicknesses.

[0018] During operation, the hose is only subjected to vertical pressure and there is no shear force along the hose axis, which greatly extends the service life of the hose. The flow rate is stable and the attenuation is very small, realizing the transmission of different flow rates between multiple channels on the same pump head. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 Schematic diagram of the overall structure of a peristaltic pump head according to an embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the transmission unit of the peristaltic pump head of the present invention;

[0022] Figure 3 Schematic diagram of the structure of the extrusion unit of the peristaltic pump head of the present invention;

[0023] Figure 4 Schematic diagram of the structure of the upper pressure block of the peristaltic pump head of the present invention;

[0024] Figure 5 It is a partial cross-sectional structural diagram of the upper pressing block of the peristaltic pump head of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the flow rate regulation of the peristaltic pump head of the present invention;

[0026] Figure 7 Schematic diagram of the external structure of the adaptive clamping unit of the peristaltic pump head of the present invention;

[0027] Figure 8 It is a schematic diagram of the internal structure of the adaptive clamping unit of the peristaltic pump head of the present invention.

[0028] Explanation of the accompanying symbols: 1. Inlet valve cam; 2. Inlet gear; 3. Main shaft drive gear; 4. Working pressure block cam; 5. Outlet gear; 6. Outlet valve cam; 11. Inlet shaft; 12. Main shaft; 13. Outlet shaft; 21. Upper pressure block; 22. Hose; 23. Locking buckle; 31. Inlet valve; 32. Guide sleeve; 33. Return spring; 34. Guide shaft; 35. Push rod; 36. Working pressure block; 37. Outlet valve; 38. Guide sleeve seat; 41. Upper pressure block base; 42. Fastening bolt; 43. Hollow bolt; 44. Adjusting bolt; 45. Inlet valve limit plate; 46. Locking screw; 47. Dovetail groove slider; 48. Dovetail slide; 51. Cover plate; 52. Pipe clamp; 53. Adaptive spring; 54. Side plate; 61. Working surface of working pressure block limit plate; 62. Working surface of working pressure block. DETAILED DESCRIPTION

[0029] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "length", "width", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal communication between two components or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] The embodiment of this specification provides a peristaltic pump head, including a pump body, a transmission unit, an extrusion unit and an upper pressure block. The upper pressure block is detachably connected to the pump body and fixes the hose to the pump body. The inside of the pump body is sequentially provided with an extrusion unit and a transmission unit from top to bottom. The extrusion unit includes several extrusion components, and the transmission unit is correspondingly provided with several transmission components. The transmission components drive the corresponding extrusion components to press the hose.

[0033] The extrusion component can be moved up and down, or rotated, etc. The key is that the contact area between the extrusion component and the hose can be changed under the drive of the transmission component. The extrusion component can be a cam, a pressure block or a disc.

[0034] For example, if the extrusion component is a compression block, the axial length of the compression block can be adjusted, thereby varying the area of the compression block squeezing the hose, thereby adjusting the flow rate. This can be achieved specifically by using a modular compression block. Furthermore, the radial height of the compression block can also be adjusted, thereby varying the degree to which the compression block squeezes the hose, also achieving flow rate adjustment.

[0035] In another embodiment, when the extrusion component is a disc or a cam, if the angles of the disc and the cam are different, the area of the extruded hose will be different, and the flow rate transmitted by the hose will be different.

[0036] In the above examples, the upper pressure block is set to be stationary. If the overlapping area between the upper pressure block and the extrusion component is adjusted to change, the flow rate transmitted by the hose will also be affected. Specifically, the position of the upper pressure block can be moved horizontally to achieve the above functions. Specifically, the upper pressure block includes an upper pressure block base and an inlet valve limit plate, an adjustable limit plate for the working pressure block, and an outlet valve limit plate installed on the upper pressure block base. The inlet valve limit plate, the adjustable limit plate for the working pressure block, and the outlet valve limit plate are respectively set corresponding to the inlet valve, the working pressure block, and the outlet valve.

[0037] At the same time, the adjustable limit plate of the working pressure block includes a dovetail groove slider, a dovetail slide, a locking screw, a hollow bolt and an adjusting bolt. The dovetail groove slider and the dovetail slide form a linear slide group. The hollow bolt is connected to the upper pressure block base through a thread and the end face is against the upper end face of the dovetail slide. The adjusting bolt passes through the hollow bolt and is screwed on the threaded hole of the upper pressure block base. After the dovetail groove slider slides to the appropriate position, it is locked and fixed by the locking screw.

[0038] Optionally, the upper pressing block and the pump body are locked and connected via locking buckles, and the locking buckles are arranged on both sides of the upper pressing block.

[0039] In addition, the transmission unit may include a first transmission component, a second transmission component and a third transmission component, and the transmission component may be a cam or other irregular transmission structures.

[0040] Optionally, the second transmission component includes a main shaft and several working pressure block cams installed on the main shaft, the first transmission component includes an inlet shaft and several inlet valve cams installed on the inlet shaft, and the third transmission component includes an outlet shaft and several outlet valve cams installed on the outlet shaft.

[0041] In addition, the second transmission component also includes a main shaft driving gear installed on the main shaft, the first transmission component also includes an inlet gear installed on the inlet shaft, and the third transmission component also includes an outlet gear installed on the outlet shaft. The driving unit drives the main shaft to rotate, and the main shaft driving gear is respectively engaged with the inlet gear and the outlet gear for transmission.

[0042] At this time, a driving unit may also be included, the driving unit driving the transmission unit. The driving unit may be a motor, the motor shaft of the motor being connected to the main shaft to provide power.

[0043] Among them, there are at least three extrusion components, the first extrusion component includes a first pushing component and an inlet valve connected to the top of the first pushing component, and the first pushing component can push the inlet valve up and down under the drive of the first transmission component. The second extrusion component includes a second pushing component and a working pressure block connected to the top of the second pushing component, and the second pushing component can push the working pressure block up and down under the drive of the second transmission component. The third extrusion component includes a third pushing component and an outlet valve connected to the top of the third pushing component, and the third pushing component can push the outlet valve up and down under the drive of the third transmission component.

[0044] At this time, the structures of the first pushing assembly, the second pushing assembly and the third pushing assembly are the same. A guide sleeve seat is fixedly connected to the inner wall of the pump body, and several guide sleeves are installed on the guide sleeve seat. The first pushing assembly includes a push rod, a guide shaft and a reset spring. The bottom ends of the two guide shafts are commonly connected to the push rod, and the top ends are respectively connected to the inlet valve after passing through the guide sleeves. A reset spring is provided on the guide shaft outer sleeve between the guide sleeve seat and the push rod.

[0045] Among them, it also includes an adaptive clamping unit, which includes a pipe clamp and an adaptive spring. The top of the outer wall of the side plates on both sides of the pump body are symmetrically opened with sliding grooves downward. The pipe clamp can be slidably installed in the sliding groove. An adaptive spring is connected between the bottom end of the pipe clamp and the bottom wall of the sliding groove. The top of the pipe clamp is V-shaped, and a cover plate is fixed to the outside of the side plate, and the cover plate is located outside the sliding groove.

[0046] This solution uses extrusion pump technology to design a peristaltic pump head with adjustable flow. During operation, the hose is only subjected to vertical pressure, with no shear force along the hose axis. This significantly increases the hose's service life, ensures stable flow, and minimizes flow attenuation. This allows for transmission of different flow rates between multiple channels on the same pump head.

[0047] On the one hand, the upper pressure block has an adjustable function. Horizontal adjustment enables flow adjustment, while vertical adjustment allows for use with hoses of different diameters and wall thicknesses.

[0048] In addition, through the meshing transmission of the gear set, the cam groups of the same channel can be installed on different axes respectively, so that the transmission pipeline can be laid along the direction perpendicular to the drive axis and can be directly installed on the commonly used driver for use.

[0049] On the other hand, the provision of adaptive pipe clamps and locking buckles can achieve automatic clamping of hoses of different diameters, and the installation of the pressure block is convenient and quick.

[0050] The following describes in detail the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0051] Example 1

[0052] like Figures 1 to 6 As shown, the peristaltic pump head of the first embodiment includes a pump body, a transmission unit, an extrusion unit and an upper pressure block 21. The upper pressure block 21 is detachably connected to the pump body and fixes the hose 22 to the pump body. The inside of the pump body is sequentially provided with an extrusion unit and a transmission unit from top to bottom. The extrusion unit includes several extrusion components, and the transmission unit is correspondingly provided with several transmission components. The transmission components drive the corresponding extrusion components to move up and down to press the hose 22.

[0053] Among them, Figure 2 As shown, the transmission unit includes a first transmission component, a second transmission component, and a third transmission component. The second transmission component includes a main shaft 12 and several working pressure block cams 4 mounted on the main shaft 12. The first transmission component includes an inlet shaft 11 and several inlet valve cams 1 mounted on the inlet shaft 11. The third transmission component includes an outlet shaft 13 and several outlet valve cams 6 mounted on the outlet shaft 13. Optionally, the inlet shaft 11 and the outlet shaft 13 are symmetrically arranged on both sides of the main shaft 12, and the axes of the three are collinear.

[0054] Correspondingly, such as Figure 3As shown, the first extrusion component includes a first pushing assembly and an inlet valve 31 connected to the top of the first pushing assembly. Driven by the first transmission component, the first pushing assembly can push the inlet valve 31 up and down. The second extrusion component includes a second pushing assembly and a working pressure block 36 connected to the top of the second pushing assembly. Driven by the second transmission component, the second pushing assembly can push the working pressure block 36 up and down. The third extrusion component includes a third pushing assembly and an outlet valve 37 connected to the top of the third pushing assembly. Driven by the third transmission component, the third pushing assembly can push the outlet valve 37 up and down. By sequentially squeezing the hose 22 with one inlet valve 31, one working pressure block 36, and one outlet valve 37, liquid transmission in one channel can be achieved. At this time, by setting several working pressure block cams 4 on the main shaft 12, several inlet valve cams 1 on the inlet shaft 11 and several outlet valve cams 6 on the outlet shaft 13, and correspondingly setting several groups of inlet valves 31, working pressure blocks 36 and outlet valves 37, a multi-channel pump head can be made. At this time, the number of working pressure block cams 4, inlet valve cams 1 and outlet valve cams 6 can be determined according to the number of channels.

[0055] However, the existing extrusion pump pipeline can only be laid along the axial direction, and its cam group is installed in series on the main shaft 12 to achieve multi-channel, which makes the peristaltic pump larger in size. This embodiment can solve the problems of the existing extrusion pump.

[0056] Furthermore, the second transmission component further includes a main shaft drive gear 3 mounted on the main shaft 12, the first transmission component further includes an inlet gear 2 mounted on the inlet shaft 11, and the third transmission component further includes an outlet gear 5 mounted on the outlet shaft 13. The drive unit (not shown) drives the main shaft 12 to rotate, and the main shaft drive gear 3 is meshed with the inlet gear 2 and the outlet gear 5 for transmission. Figure 2 As shown, the inlet valve cam 1, the working pressure block cam 4, and the outlet valve cam 6 are respectively installed on the main shaft 12, the inlet shaft 11 and the outlet shaft 13. Through the meshing transmission of the gear set, the cam groups of the same channel can be installed on different shafts respectively to meet the requirement that the transmission channel is laid along the direction of the drive shaft of the vertical drive unit (not shown in the figure). It can be directly installed on a commonly used drive unit (not shown in the figure) for use. At this time, the hose 22 pipeline is laid perpendicular to the main shaft 12.

[0057] At this time, the driving unit is a motor, and the motor shaft of the motor is connected to the main shaft 12 to provide power. Specifically, one end of the main shaft 12 extends outward from the pump body and is connected to the motor shaft of the motor, and the other end is rotatably connected to the inner wall of the pump body. The motor shaft drives the main shaft 12 to rotate. Since the main shaft drive gear 3 is respectively engaged with the inlet gear 2 and the outlet gear 5 for transmission, the main shaft 12, the inlet shaft 11 and the outlet shaft 13 can be rotated at the same time, thereby driving the inlet valve cam 1, the working pressure block cam 4, and the outlet valve cam 6 to rotate, so as to realize the driving of the inlet valve 31, the working pressure block 36 and the outlet valve 37.

[0058] The first, second, and third pusher assemblies have identical structures. To ensure vertical movement of the extrusion unit, a guide sleeve seat 38 is fixed to the inner wall of the pump body. Several guide sleeves 32 are mounted on the guide sleeve seat 38. Specifically, the first pusher assembly includes a push rod 35, a guide shaft 34, and a return spring 33. The bottom ends of the two guide shafts 34 are connected to the push rod 35, and the top ends of the two guide shafts 34 pass through the guide sleeves 32 and are connected to the inlet valve 31. A return spring 33 is mounted on the outer sleeves of the guide shafts 34 between the guide sleeve seat 38 and the push rod 35. The push rod 35 is positioned in correspondence with the cam and moves linearly up and down according to the cam profile. The guide sleeve seat 38 is fixed to the pump body with bolts.

[0059] Optional, such as Figure 6 As shown, the cross-sections of the push rod 35 of the first pushing assembly and the push rod of the third pushing assembly are both rectangular, while the cross-section of the push rod of the second pushing assembly is T-shaped, and the length of the push rod 35 of the first pushing assembly and the length of the push rod of the third pushing assembly are both smaller than the length of the push rod of the second pushing assembly; optionally, the two guide shafts 34 of the first pushing assembly and the third pushing assembly are both longitudinally symmetrically arranged, while the two guide shafts 34 of the second pushing assembly are laterally symmetrically arranged.

[0060] like Figure 4 、 Figure 5As shown, the upper pressure block 21 includes an upper pressure block base 41 and an inlet valve limit plate 45, an adjustable limit plate of the working pressure block 36 and a limit plate of the outlet valve 37 installed on the upper pressure block base 41. The inlet valve limit plate 45, the adjustable limit plate of the working pressure block 36 and the limit plate of the outlet valve 37 are respectively arranged corresponding to the inlet valve 31, the working pressure block 36 and the outlet valve 37. At the same time, the adjustable limit plate of the working pressure block 36 includes a dovetail groove slider 47, a dovetail slide 48, a locking screw 46, a hollow bolt 43 and an adjusting bolt 44. The dovetail groove slider 47 and the dovetail slide 48 form a linear sliding group. The hollow bolt 43 is threadedly connected to the upper pressure block base 41 and its end face is against the upper end face of the dovetail slide 48. The adjusting bolt 44 passes through the hollow bolt 43 and is screwed on the threaded hole of the upper pressure block base 41. After the dovetail groove slider 47 slides to the appropriate position, it is locked and fixed by the locking screw 46. In addition, fastening bolts 42 are symmetrically arranged on both sides of the adjustment bolt 44. The fastening bolts 42 pass through the upper pressure block base 41 and are connected to the adjustable limit plate of the working pressure block 36 to enhance the stability of the connection.

[0061] An independent upper pressing block 21 is provided on each channel, and the upper pressing block 21 can be adjusted in the vertical direction by loosening and tightening the hollow bolt 43 and the adjusting bolt 44. The gap between the pressing tubes can be adjusted to accommodate hoses 22 of different diameters and wall thicknesses, thus providing a wider range of applications. At the same time, the dovetail groove slider 47 is locked and fixed by the locking screw 46 after sliding to the appropriate position, and can also be adjusted in the horizontal direction. Figure 6 As shown, horizontal adjustment can change the overlap between the working surface 62 of the working pressure block and the working surface 61 of the working pressure block limiter, thereby achieving different flow rates between different channels. In this case, the upper pressure block 21 can be adjusted in both vertical and horizontal directions. In this case, when using the same diameter hose 22, adjusting the adjustable structure of the upper pressure block 21 can achieve different flow rates for each channel.

[0062] Example 2

[0063] In the second embodiment, Figure 7 、 Figure 8 As shown, the peristaltic pump head also includes an adaptive clamping unit, which includes a tube clamp 52 and an adaptive spring 53. The top of the outer wall of the side panels 54 on both sides of the pump body are symmetrically provided with downward sliding grooves. The tube clamp 52 can be slidably installed in the sliding grooves. The adaptive spring 53 is connected between the bottom end of the tube clamp 52 and the bottom wall of the sliding groove. The top of the tube clamp 52 is V-shaped, and the cover plate 51 is fixedly connected to the outside of the side panel 54. The cover plate 51 is located outside the sliding groove. During use, when it is necessary to replace the hose 22 of a different diameter, the adaptive clamping unit can automatically clamp the hose 22, improving the convenience of use. At this time, installing the upper pressure block 21 is more convenient and quick.

[0064] In order to prevent the pipe clamp 52 from falling out when sliding in the chute, limit blocks are symmetrically provided on both sides of the top of the chute, and protrusions are correspondingly provided on both sides of the bottom of the pipe clamp 52.

[0065] The cover plate 51 is fixed to the side plate 54 by screws to achieve a stable connection between the two. Optionally, a V-shaped groove corresponding to the pipe clamp 52 is opened on the top of the cover plate 51 to prevent interference between the cover plate 51 and the hose 22 when the diameter of the hose 22 is too large.

[0066] In order to better achieve the clamping of the hose 22, an inverted V-shaped matching groove is opened at the bottom of the upper pressure block 21 corresponding to the pipe clamp 52. The matching groove cooperates with the pipe clamp 52 to fix the hose 22. At this time, the hose 22 first passes through the gap formed between the matching groove on one side and the pipe clamp 52, and then passes through the gap between the inlet valve limit plate 45 and the inlet valve 31, the gap between the adjustable limit plate of the working pressure block 36 and the working pressure block 36, and the gap between the limit plate of the outlet valve 37 and the outlet valve 37, and then extends out from the gap formed between the matching groove on the other side and the pipe clamp 52.

[0067] In addition, the upper pressing block 21 and the pump body are locked and connected via locking buckles 23 , and the locking buckles 23 are provided on both sides of the upper pressing block 21 .

[0068] Example 3

[0069] In the third embodiment, Figures 1 to 3 As shown, two working pressure block cams 4 are provided on the main shaft 12, two inlet valve cams 1 are provided on the inlet shaft 11, and two outlet valve cams 6 are provided on the outlet shaft 13. Two groups of inlet valves 31, two groups of working pressure blocks 36 and two groups of outlet valves 37 are provided accordingly, so as to make a dual-channel pump head. Correspondingly, two independent upper pressure blocks 21 are detachably connected to the pump body.

[0070] The above-described embodiments merely illustrate preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications and improvements to the technical solutions of the present invention made by persons skilled in the art without departing from the spirit of the present invention are intended to fall within the scope of protection defined by the claims.

Claims

1. A peristaltic pump head, characterized in that: include: A pump body, a transmission unit, an extrusion unit, and an upper pressure block. The upper pressure block is detachably connected to the pump body. A hose is fixed between the upper pressure block and the pump body. The extrusion unit and the transmission unit are sequentially arranged inside the pump body from top to bottom. The extrusion unit includes several extrusion components. The transmission unit is correspondingly provided with several transmission components. The transmission components drive the corresponding extrusion components to press the hose. The transmission unit includes a first transmission component, a second transmission component and a third transmission component, the second transmission component includes a main shaft and a plurality of working pressure block cams installed on the main shaft, the first transmission component includes an inlet shaft and a plurality of inlet valve cams installed on the inlet shaft, and the third transmission component includes an outlet shaft and a plurality of outlet valve cams installed on the outlet shaft; The extrusion unit includes at least three extrusion components, the first extrusion component includes a first pushing component and an inlet valve connected to the top of the first pushing component, and the first pushing component can push the inlet valve up and down under the drive of the first transmission component; the second extrusion component includes a second pushing component and a working pressure block connected to the top of the second pushing component, and the second pushing component can push the working pressure block up and down under the drive of the second transmission component; the third extrusion component includes a third pushing component and an outlet valve connected to the top of the third pushing component, and the third pushing component can push the outlet valve up and down under the drive of the third transmission component; The upper pressure block includes an upper pressure block base and an inlet valve limit plate, a working pressure block adjustable limit plate and an outlet valve limit plate installed on the upper pressure block base, the inlet valve limit plate, the working pressure block adjustable limit plate and the outlet valve limit plate are respectively arranged corresponding to the inlet valve, the working pressure block and the outlet valve; The adjustable limit plate of the working pressure block includes a dovetail groove slider, a dovetail slide, a locking screw, a hollow bolt and an adjusting bolt. The dovetail groove slider and the dovetail slide form a linear slide group. The hollow bolt is connected to the upper pressure block base through a thread and its end face is against the upper end face of the dovetail slide. The adjusting bolt passes through the hollow bolt and is screwed into the threaded hole of the upper pressure block base. After the dovetail groove slider slides to an appropriate position, it is locked and fixed by the locking screw. The upper pressing block is locked with the pump body via locking buckles, and the locking buckles are arranged on both sides of the upper pressing block.

2. The peristaltic pump head according to claim 1, characterized in that: The contact area between the extrusion component and the hose can be changed under the drive of the transmission component.

3. The peristaltic pump head according to claim 1, characterized in that: The second transmission component also includes a main shaft driving gear installed on the main shaft, the first transmission component also includes an inlet gear installed on the inlet shaft, and the third transmission component also includes an outlet gear installed on the outlet shaft. The main shaft driving gear is respectively engaged with the inlet gear and the outlet gear for transmission.

4. The peristaltic pump head according to claim 1, characterized in that: A guide sleeve seat is fixedly connected to the inner wall of the pump body, and several guide sleeves are installed on the guide sleeve seat. The first pushing assembly includes a push rod, a guide shaft and a return spring. The guide shaft and the guide sleeve are cooperatively connected. The bottom end of the guide shaft is connected to the push rod, and the top end of the guide shaft passes through the guide sleeve and is connected to the inlet valve. The return spring is provided on the outer sleeve of the guide shaft between the guide sleeve seat and the push rod.

5. The peristaltic pump head according to any one of claims 1 to 4, characterized in that: It also includes an adaptive clamping unit, which includes a pipe clamp and an adaptive spring. The top ends of the outer walls of the side plates on both sides of the pump body are symmetrically provided with sliding grooves downward. The pipe clamp can be slidably installed in the sliding grooves. The adaptive spring is connected between the bottom end of the pipe clamp and the bottom wall of the sliding groove. The top end of the pipe clamp is V-shaped. A cover plate is fixed to the outside of the side plate, and the cover plate is located outside the sliding groove.

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