Linear peristaltic pump head facilitating pipe replacement

Abstract

The utility model belongs to the technical field of fluid delivery pumps, in particular to a pump head of a linear peristaltic pump, which is convenient for pipe replacement and comprises a base and a pump cover, a wheel carrier and a hose are arranged on the base, a roller is clamped on the wheel carrier, the pump cover comprises a cover plate and a connecting plate, the connecting plate is vertically arranged on one side of the cover plate adjacent to the end of the hose, and a limit rib is arranged at the end of the connecting plate. A first gap is reserved between the roller and the connecting plate; a limiting clamping groove is formed in the base, a limiting clamping hook matched with the limiting rib is arranged on the side wall of the limiting clamping groove, a locking mechanism used for fixing the position of the cover plate is arranged on the other symmetrical side of the limiting clamping groove, and a supporting plate is arranged on the base. One end of the pump cover is matched and fixed with the limiting clamping hook on the base through the limiting rib on the connecting plate, and the other end of the pump cover is fixed through the locking mechanism on the base, so that the pump cover is fixed on the base, one end of the pump cover can be separated from the base by opening the locking mechanism, and the limiting rib can be separated from the limiting clamping hook by rotating at a small angle in the limiting clamping groove to take down the pump cover; hose replacement is convenient, and occupied space is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid delivery pumps, in particular to a linear peristaltic pump head with convenient tube replacement. Background Art

[0002] Peristaltic pump is a new type of fluid delivery pump that appeared after rotor pump, centrifugal pump, diaphragm pump, etc. It is being widely promoted and applied in various industries such as medical treatment, medicine, food, beverage, chemical industry, smelting, laboratory analysis, etc. The hose for conveying liquid inside the peristaltic pump is the only consumable. Due to its frequent use, its service life is short and it needs to be replaced frequently. Therefore, it is particularly important to improve the convenience of hose replacement and reduce the difficulty of operation.

[0003] Currently, most peristaltic pumps on the market are of the fixed pressure block type, which makes it inconvenient to change the tube and requires tools. The hose cannot be kept centered, which can easily cause the tube to be worn and damaged. Other peristaltic pumps that are easy to change the tube mainly have eccentric wheel structures and rotating pressure block structures, and the installation controls of the hose are relatively narrow, making it inconvenient to operate.

[0004] As the number of peristaltic pumps used in a single device increases, higher requirements are placed on peristaltic pumps, which require not only convenient tube replacement, but also the requirement that the peristaltic pumps be arranged as closely as possible to save space. Currently, several linear peristaltic pump heads on the market that are easy to replace tubes have the problem of occupying a large space and cannot be arranged too closely.

[0005] In view of the above problems, the utility model document proposes a linear peristaltic pump head with convenient tube replacement. Utility Model Content

[0006] The utility model provides a linear peristaltic pump head which is convenient for tube replacement, reduces the difficulty of tube replacement operation, improves tube replacement efficiency, and does not increase space occupation.

[0007] The utility model provides the following technical solutions:

[0008] A linear peristaltic pump head with convenient tube replacement comprises a base and a pump cover, wherein a wheel frame and a hose are provided on the base, a roller is clamped on the wheel frame, two ends of the hose are clamped between the base and the pump cover, and are located on two sides of opposite sides of the base, the pump cover comprises a cover plate and a connecting plate, the connecting plate is vertically arranged on a side surface of the cover plate adjacent to the end of the hose, one end of the connecting plate is connected to the cover plate, and the other end is provided with a limiting rib, and a first gap for clamping the hose is left between the roller and the connecting plate; the base has a limiting slot corresponding to the position of the limiting rib, the side wall of the limiting slot is provided with a limiting hook cooperating with the limiting rib, and the other side symmetrically is provided with a locking mechanism for fixing the position of the cover plate, and a support plate for supporting the cover plate is provided at a position close to the locking mechanism on the top surface of the base.

[0009] Furthermore, the locking mechanism is a rotating buckle, which is a "U"-shaped structure with rotating shafts at both ends and a locking rib on the middle inner wall. An axial hole is provided at a position corresponding to the rotating shaft on the base, and a locking groove matching the locking rib is provided on the top surface of the pump cover away from the connecting plate.

[0010] Furthermore, a limiting groove is provided on the top surface of the support plate, and a limiting boss matching the limiting groove is provided at a corresponding position of the cover plate.

[0011] Furthermore, joints are provided at both ends of the hose, and first positioning blocks are provided at positions corresponding to the two ends of the hose on the base, a lower positioning groove for clamping the joint is opened on the first positioning block, and a clearance groove for the hose to pass through is opened on the side wall of the lower positioning groove, and a first pressing block is provided on the bottom surface of the cover plate at a position corresponding to the first positioning block, and an upper positioning groove matching the lower positioning groove is opened on the first pressing block.

[0012] Furthermore, second positioning blocks are provided on the base at positions corresponding to both ends of the hose, and a lower clamping groove is formed on the second positioning block, in which a lower tube clamp is clamped; a second pressing block is provided on the bottom surface of the pump cover at a position corresponding to the second positioning block, and an upper clamping groove is formed on the second pressing block, in which an upper tube clamp is clamped, and adjacent surfaces of the upper tube clamp and the lower tube clamp are concave arc surfaces, and the end of the hose is clamped between the upper tube clamp and the lower tube clamp.

[0013] Furthermore, a limiting clamping plate for fixing the hose is also provided on the side of the lower tube clamp, and a positioning slot is provided on the limiting clamping plate, and the hose is clamped in the positioning slot, and the positioning slot is a closed "U"-shaped slot.

[0014] Furthermore, a compression spring is provided between the lower pipe clamp and the lower clamping groove.

[0015] Furthermore, the lower tube clamp is arranged in the lower clamping groove through a buckle connection, and the upper tube clamp is arranged in the upper clamping groove through a buckle connection.

[0016] Furthermore, a plurality of limiting ribs are provided at the end of the connecting plate, and a second gap is left between adjacent limiting ribs, and a limiting partition is provided at a position corresponding to the second gap in the limiting slot.

[0017] In the utility model, one end of the pump cover is fixed by the limiting rib on the connecting plate and the limiting hook on the base, and the other end is fixed by the locking mechanism on the base, so that the pump cover is fixed on the base. When the locking mechanism is opened, one end of the pump cover can be separated from the base, and the limiting rib can be separated from the limiting hook by a small angle rotation in the limiting groove, so that the pump cover can be removed, which is convenient for replacing the hose and reduces space occupancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An assembly diagram of a linear peristaltic pump head with convenient tube replacement provided by an embodiment of the utility model;

[0019] Figure 2 A schematic cross-sectional view of a linear peristaltic pump head with convenient tube replacement provided by an embodiment of the utility model in a closed state of a pump cover;

[0020] Figure 3 A schematic cross-sectional view of a linear peristaltic pump head with a convenient tube replacement in an open state provided by an embodiment of the utility model;

[0021] Figure 4 A schematic diagram of the three-dimensional structure of a base in a pump head of a linear peristaltic pump with convenient tube replacement provided by an embodiment of the utility model;

[0022] Figure 5 A bottom-up stereoscopic structural diagram of a pump cover in a linear peristaltic pump head with convenient tube replacement provided by an embodiment of the utility model;

[0023] Figure 6 A schematic top view of a three-dimensional structure of a pump cover in a linear peristaltic pump head with convenient tube replacement provided by an embodiment of the utility model;

[0024] Figure 7 A schematic diagram of the three-dimensional structure of a rotating buckle in a pump head of a linear peristaltic pump with convenient tube replacement provided by an embodiment of the utility model;

[0025] Figure 8 A schematic diagram of the three-dimensional structure of a pump cover in a linear peristaltic pump head with convenient tube replacement provided by another embodiment of the utility model;

[0026] Fig. 9 Another embodiment of the utility model provides a cross-sectional structural schematic diagram of a hose fixing method in a linear peristaltic pump head with convenient tube replacement.

[0027] Reference numerals:

[0028] 1. Base; 101. First positioning block; 102. Lower positioning groove; 103. Displacement groove; 104. Limiting groove; 105. Support plate; 106. Limiting slot; 107. Limiting hook; 108. Limiting partition; 109. Shaft hole; 1010. Lower slot; 1011. Second positioning block; 2. Pump cover; 201. Cover plate; 202. Connecting plate; 203. Limiting rib; 204. Second Gap; 205, locking groove; 206, limiting boss; 207, first pressure block; 208, upper slot; 209, second pressure block; 2010, upper positioning slot; 3, wheel frame; 4, roller; 5, hose; 6, rotating buckle; 601, rotating shaft; 602, locking convex strip; 7, joint; 8, lower pipe clamp; 9, upper pipe clamp; 10, limiting clamp plate; 11, positioning slot; 12, compression spring. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "connection" can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed" means that they are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present utility model, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present utility model, 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 a limitation on the embodiments of the present utility model.

[0031] In the embodiments of the present invention, 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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0032] In the embodiment of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0033] References to "one embodiment" or "some embodiments" etc. described in this specification mean that one or more embodiments of the utility model include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0034] Embodiment 1:

[0035] Reference Figure 1-Figure 7 As shown, a linear peristaltic pump head with convenient tube replacement includes a base 1 and a pump cover 2, a wheel frame 3 and a hose 5 are provided on the base 1, a roller 4 is clamped on the wheel frame 3, two ends of the hose 5 are clamped between the base 1 and the pump cover 2, and are located on two sides of opposite sides of the base 1, the pump cover 2 includes a cover plate 201 and a connecting plate 202, the connecting plate 202 is vertically arranged on a side surface of the cover plate 201 adjacent to the end of the hose 5, one end of the connecting plate 202 is connected to the cover plate 201, and the other end is provided with a limiting rib 203, and a first gap for clamping the hose 5 is reserved between the roller 4 and the connecting plate 202; the base 1 is provided with a limiting card groove 106 corresponding to the position of the limiting rib 203, and the side wall of the limiting card groove 106 is provided with a limiting hook 107 cooperating with the limiting rib 203, and the other side is symmetrically provided with a locking mechanism for fixing the position of the cover plate 201, and a support plate 105 for supporting the cover plate 201 is provided at a position close to the locking mechanism on the top surface of the base 1.

[0036] The limiting rib 203 is clamped in the limiting groove 106, and the limiting rib 203 cooperates with the limiting hook 107 to fix the connecting plate 202, fix one end of the cover plate 201, and the support plate 105 supports the cover plate 201, so that the locking mechanism can press and fix the cover plate 201, so that the pump cover 2 is fixed on the base 1.

[0037] When opening, after the locking mechanism is separated from the pump cover 2, the pump cover 2 can rotate with the limiting rib 203. When the limiting rib 203 rotates a certain angle, it can be taken out from the limiting slot 106, thereby separating the pump cover 2 from the base 1. Then the hose 5 can be replaced, which is convenient for replacing the hose 5 and reduces the space occupied when multiple peristaltic pump heads are closely arranged.

[0038] The locking mechanism is a rotating buckle 6, which is a "U"-shaped structure. A rotating shaft 601 is provided at both ends, a locking ridge 602 is provided on the middle inner wall, and an axial hole 109 is provided at a position corresponding to the rotating shaft 601 on the base 1. A locking groove 205 matching the locking ridge 602 is provided on the top surface of the pump cover 2 on the side away from the connecting plate 202.

[0039] By rotating the rotating shaft 601 in the axial hole 109 on the base 1, the rotating buckle 6 is rotated on the base 1. After the locking rib 602 on the rotating buckle 6 is rotated into the locking groove 205, the pump cover 2 can be pressed and fixed. If the pump cover 2 is to be opened, the rotating buckle 6 is rotated so that the locking rib 602 is separated from the locking groove 205, and the pump cover 2 can be opened.

[0040] The top surface of the support plate 105 is provided with a limiting groove 104, and the corresponding position of the cover plate 201 is provided with a limiting boss 206 that matches the limiting groove 104. The limiting boss 206 cooperates with the limiting groove 104, so that the cover plate 201 is stably fixed on the base 1, and at the same time, it is ensured that the position of the pump cover 2 will not change when the peristaltic pump is working, and will not affect the hose 5 stuck in the first gap, thereby ensuring the normal operation of the peristaltic pump.

[0041] Connectors 7 are provided at both ends of the hose 5, and first positioning blocks 101 are provided at positions corresponding to the two ends of the hose 5 on the base 1. The first positioning block 101 is provided with a lower positioning groove 102 for clamping the connector 7, and a side wall of the lower positioning groove 102 is provided with a clearance groove 103 for the hose 5 to pass through. A first pressing block 207 is provided on the bottom surface of the cover plate 201 at a position corresponding to the first positioning block 101, and the first pressing block 207 is provided with an upper positioning groove 2010 that matches the lower positioning groove 102.

[0042] The connector 7 is clamped in the lower positioning groove 102 of the first positioning block 101, and the give way groove 103 facilitates the connection between the connector 7 and the hose 5. The connector 7 is pressed and fixed by the cooperation of the upper positioning groove 2010 and the lower positioning groove 102. The hose 5 is connected to the connector 7, which can reduce the influence of the first positioning block 101 and the first pressing block 207 on the positioning of the hose 5. The hose 5 will not be deformed and will not affect the transportation of the fluid inside the hose 5, thereby improving the flow transportation accuracy of the peristaltic pump.

[0043] A plurality of limiting ribs 203 are disposed at the end of the connecting plate 202 , and a second gap 204 is left between adjacent limiting ribs 203 . A limiting partition plate 108 is disposed at a position in the limiting slot 106 corresponding to the second gap 204 .

[0044] The end of the connecting plate 202 is firmly fixed by means of a plurality of limiting ribs 203, and the limiting partition 108 prevents the limiting rib 203 from shaking in the limiting slot 106, thereby ensuring the stability of the pump cover 2 and further preventing the position from changing due to squeezing during use, thereby ensuring the normal use of the peristaltic pump.

[0045] When in use, the connectors 7 are connected to both ends of the hose 5, the middle part of the hose 5 is placed on the side of the roller 4 close to the limiting slot 106, and the connector 7 is clamped in the lower positioning slot 102 of the first positioning block 101, and then the limiting rib 203 on the pump cover 2 is clamped in the limiting slot 106, and then the pump cover 2 is rotated and pressed down so that the limiting rib 203 cooperates with the limiting hook 107, and the limiting boss 206 at the other end of the pump cover 2 is clamped in the limiting slot 104 on the support plate 105, and then the rotating buckle 6 is rotated so that the locking rib 602 on the rotating buckle 6 is clamped in the locking groove 205 on the pump cover 2 4 and 5. When the pump cover 2 is in the state of being moved upward, the pump cover 2 is fixed on the base 1. At this time, the hose 5 is stuck in the first gap between the roller 4 and the pump cover 2. When the pump cover 2 needs to be opened to replace the hose 5, the rotating buckle 6 is rotated to make the locking ridge 602 move out of the locking groove 205. The pump cover 2 moves upward under the elastic force of the hose 5. After the pump cover 2 moves to a certain angle, the limiting rib 203 is separated from the limiting hook 107. At this time, the limiting rib 203 can be taken out from the limiting groove 106 to separate the pump cover 2 from the base 1, so as to replace the hose 5. The connector 7 can be taken out from the lower positioning groove 102 to replace the hose 5.

[0046] The entire operation process is simple and convenient, and after the pump cover 2 is opened, the pump cover 2 can be removed by turning it at a small angle, which reduces the space occupied by the peristaltic pump and makes it easier to arrange the peristaltic pump tightly to meet usage requirements.

[0047] This method of fixing the hose 5 is to fix the hose 5 through a connector 7. The connector 7 is made of a hard material and will not deform when subjected to force, so it will not affect the flow effect inside the hose 5, thereby ensuring the flow accuracy of the peristaltic pump. It is suitable for use in places with high requirements for flow accuracy.

[0048] Embodiment 2:

[0049] Reference Figure 8 and Fig. 9 As shown, second positioning blocks 1011 are provided at positions corresponding to both ends of the hose 5 on the base 1, and a lower clamping groove 1010 is formed on the second positioning block 1011, and a lower pipe clamp 8 is clamped in the lower clamping groove 1010; a second pressing block 209 is provided at a position on the bottom surface of the pump cover 2 corresponding to the second positioning block 1011, and an upper clamping groove 208 is formed on the second pressing block 209, and an upper pipe clamp 9 is clamped in the upper clamping groove 208, and the adjacent surfaces of the upper pipe clamp 9 and the lower pipe clamp 8 are concave arc surfaces, and the end of the hose 5 is clamped between the upper pipe clamp 9 and the lower pipe clamp 8.

[0050] The hose 5 is clamped and positioned by the cooperation of the upper tube clamp 9 and the lower tube clamp 8, and the adjacent surfaces of the upper tube clamp 9 and the lower tube clamp 8 are arc surfaces, and the hose 5 is clamped in the concave part of the arc surface, ensuring that the use of the hose 5 will not be affected while clamping the hose 5, ensuring that the fluid inside the hose 5 can be transported normally, thereby ensuring the normal use of the peristaltic pump.

[0051] A limiting clamping plate 10 for fixing the hose 5 is also provided on the side of the lower tube clamp 8. A positioning clamping groove 11 is opened on the limiting clamping plate 10. The hose 5 is clamped in the positioning clamping groove 11. The positioning clamping groove 11 is a closed "U"-shaped groove.

[0052] The hose 5 is clamped in the positioning slot 11 to position the hose 5, ensuring that the position of the hose 5 will not change when the second pressing block 209 and the second positioning block 1011 press and fix the hose 5, thereby ensuring accurate positioning of the hose 5. Since the pressing surfaces of the second pressing block 209 and the second positioning block 1011 are curved surfaces, if the position of the hose 5 changes when it is pressed, it will affect the fluid conveying effect of the hose 5, and further affect the fluid conveying effect of the peristaltic pump.

[0053] A compression spring 12 is also provided between the lower pipe clamp 8 and the lower clamping groove 1010. The compression spring 12 acts on the lower pipe clamp 8 so that the lower pipe clamp 8 cooperates with the upper pipe clamp 9 to compress the hose 5, preventing the hose 5 from loosening and affecting the fluid flow effect.

[0054] The lower pipe clamp 8 is arranged in the lower clamping groove 1010 through a snap connection, and the upper pipe clamp 9 is arranged in the upper clamping groove 208 through a snap connection.

[0055] Prevent the upper tube clamp 9 from falling off from the upper clamping groove 208 and prevent the lower tube clamp 8 from falling off from the lower clamping groove 1010, ensure the stability of the positions of the upper tube clamp 9 and the lower tube clamp 8, ensure the compression effect on the hose 5, and further ensure the fluid conveying effect of the peristaltic pump.

[0056] When in use, the end of the hose 5 is clamped in the positioning slot 11 of the limiting card plate 10, and then the middle of the hose 5 is placed on the side of the roller 4 close to the limiting slot 106, and then the limiting rib 203 on the pump cover 2 is clamped in the limiting slot 106, and then the pump cover 2 is rotated and pressed down to make the limiting rib 203 cooperate with the limiting hook 107, and the limiting boss 206 at the other end of the pump cover 2 is clamped in the limiting slot 104 on the support plate 105, and then the rotating buckle 6 is rotated to make the locking convex strip 602 on the rotating buckle 6 clamped in the locking groove 205 on the pump cover 2, so that the pump cover 2 is fixed to the base 1 At this time, the hose 5 is clamped in the first gap between the roller 4 and the pump cover 2, and the two ends of the hose 5 are pressed and fixed by the upper tube clamp 9 and the lower tube clamp 8; when it is necessary to open the pump cover 2 to replace the hose 5, the rotating buckle 6 is rotated to make the locking ridge 602 move out of the locking groove 205, and the pump cover 2 moves upward under the elastic force of the hose 5. After the pump cover 2 moves a certain angle, the limiting rib 203 is separated from the limiting hook 107. At this time, the limiting rib 203 can be taken out of the limiting groove 106 to separate the pump cover 2 from the base 1, and then the hose 5 can be taken out of the positioning groove 11 to replace the hose 5.

[0057] This type of fixing method of the hose 5 will have a certain impact on the flow effect inside the hose 5, as the upper tube clamp 9 and the lower tube clamp 8 directly act on the hose 5, thereby affecting the flow accuracy of the peristaltic pump. It is suitable for use in places where the flow accuracy requirements are not particularly high.

[0058] In actual use, the cover plate 201 and the connecting plate 202 are integrally formed to improve the structural strength of the pump cover 2 , while the base 1 and the supporting plate 105 are integrally formed to ensure the connection strength between the supporting plate 105 and the base 1 .

[0059] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited to them. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model; in the absence of conflicts, the embodiments of the utility model and the features in the embodiments can be combined with each other. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A linear peristaltic pump head with convenient tube replacement, comprising a base and a pump cover, wherein a wheel frame and a hose are arranged on the base, a roller is clamped on the wheel frame, and two ends of the hose are clamped between the base and the pump cover and are located on two sides of opposite sides of the base, characterized in that: The pump cover includes a cover plate and a connecting plate, the connecting plate is vertically arranged on a side surface of the cover plate adjacent to the end of the hose, one end of the connecting plate is connected to the cover plate, and the other end is provided with a limiting rib, and a first gap for clamping the hose is reserved between the roller and the connecting plate; the base has a limiting slot corresponding to the position of the limiting rib, the side wall of the limiting slot is provided with a limiting hook cooperating with the limiting rib, and the other symmetrical side is provided with a locking mechanism for fixing the position of the cover plate, and a support plate for supporting the cover plate is provided on the top surface of the base near the locking mechanism.

2. A linear peristaltic pump head with convenient tube replacement according to claim 1, characterized in that: The locking mechanism is a rotating buckle, which is a "U"-shaped structure with rotating shafts at both ends and a locking convex strip on the inner wall in the middle. An axial hole is provided on the base at a position corresponding to the rotating shaft, and a locking groove matching the locking convex strip is provided on the top surface of the pump cover on the side away from the connecting plate.

3. A linear peristaltic pump head with convenient tube replacement according to claim 2, characterized in that: A limiting groove is provided on the top surface of the support plate, and a limiting boss matched with the limiting groove is provided at a corresponding position of the cover plate.

4. A linear peristaltic pump head with convenient tube replacement according to claim 3, characterized in that: The two ends of the hose are provided with joints, and the positions of the base corresponding to the two ends of the hose are provided with first positioning blocks, the first positioning block is provided with a lower positioning groove for clamping the joint, and the side wall of the lower positioning groove is provided with a clearance groove for the hose to pass through, and the bottom surface of the cover plate is provided with a first pressing block at the position corresponding to the first positioning block, and the first pressing block is provided with an upper positioning groove matching the lower positioning groove.

5. A linear peristaltic pump head with convenient tube replacement according to claim 3, characterized in that: A second positioning block is provided on the base at positions corresponding to both ends of the hose, and a lower clamping groove is formed on the second positioning block, in which a lower pipe clamp is clamped; a second pressing block is provided on the bottom surface of the pump cover at a position corresponding to the second positioning block, and an upper clamping groove is formed on the second pressing block, in which an upper pipe clamp is clamped, the adjacent surfaces of the upper pipe clamp and the lower pipe clamp are concave arc surfaces, and the end of the hose is clamped between the upper pipe clamp and the lower pipe clamp.

6. A linear peristaltic pump head with convenient tube replacement according to claim 5, characterized in that: A limiting card plate for fixing the hose is also provided on the side of the lower pipe clamp, and a positioning card slot is opened on the limiting card plate, and the hose is clamped in the positioning card slot, and the positioning card slot is a closed "U"-shaped slot.

7. A linear peristaltic pump head with convenient tube replacement according to claim 6, characterized in that: A compression spring is also provided between the lower pipe clamp and the lower clamping groove.

8. A linear peristaltic pump head with convenient tube replacement according to claim 7, characterized in that: The lower pipe clamp is arranged in the lower clamping groove through a buckle connection, and the upper pipe clamp is arranged in the upper clamping groove through a buckle connection.

9. A linear peristaltic pump head with convenient tube replacement according to claim 4 or 8, characterized in that: A plurality of limiting ribs are arranged at the end of the connection plate, and a second gap is left between adjacent limiting ribs. A limiting partition is arranged at a position corresponding to the second gap in the limiting slot.

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