A linear peristaltic pump head with easy pipe replacement

Abstract

This utility model provides a linear peristaltic pump head with convenient tubing replacement, relating to the field of peristaltic pump technology. It includes a base, on which a DC motor is fixedly mounted at the bottom via several pan head screws. A wheel frame is fixedly mounted at the output end of the DC motor, and several rollers are rotatably mounted inside the wheel frame via small shafts. A connecting frame is fixedly mounted on one side of the upper surface of the base, and an upper support is mounted on the upper end of the connecting frame via several first self-tapping screws. Two first protrusions and two second protrusions are respectively mounted at both ends of the upper surface of the base, and a pressure block is rotatably mounted between the two second protrusions. This utility model features a simple pump head assembly process, requiring no tools and improving production efficiency; convenient pump tubing replacement with ample operating space, allowing for manual operation without tools; a stable structure, solving the problems of hose misalignment and abnormal wear, and avoiding the risk of pipe joint detachment; and a compact pump head structure with minimal operating space for tubing replacement, reducing the space required for pump head layout.

Description

Technical Field

[0001] This utility model relates to the field of peristaltic pump technology, and more specifically, to a linear peristaltic pump head that is easy to replace the tube. Background Technology

[0002] Peristaltic pumps are a new type of fluid transfer pump following rotary pumps, centrifugal pumps, and diaphragm pumps. They are being widely promoted and applied in various industries such as medical, pharmaceutical, food, beverage, chemical, metallurgical, and laboratory analysis. The internal tubing used to transport the liquid in a peristaltic pump is the only consumable component. Due to its frequent use, its lifespan is relatively short, requiring frequent replacement. Therefore, improving the ease of tubing replacement is particularly important.

[0003] Most peristaltic pumps on the market are currently fixed-block type, which requires tools, especially in narrow spaces, making tube replacement inconvenient. In addition, rotating block structures and other single-sided bridge structures cannot guarantee the centering of the hose, which can easily cause tube breakage. Furthermore, the block assembly process is complicated, resulting in low efficiency.

[0004] As the number of peristaltic pumps used in a single device increases, higher demands are placed on the pumps. Not only is easy tubing replacement required, but the pumps also need to be arranged as compactly as possible to save space. Currently, the several linear pump heads on the market that offer easy tubing replacement all suffer from the problem of occupying a large amount of space, making it impossible to arrange them too compactly.

[0005] In addition, for high-flow linear peristaltic pumps, the current market uses connectors to connect the internal and external pipelines. If the connector is not secured with fasteners, it is easy for it to come loose under pressure in the pipeline. Currently, the most common fixing method on the market is screw fixing, which requires tools for disassembly and makes it inconvenient to replace the pipe. Utility Model Content

[0006] The main purpose of this invention is to provide a linear peristaltic pump head that is easy to replace the tubing, which can effectively solve the problem that existing peristaltic pumps require tools to replace the tubing and cannot be arranged too tightly due to the large disassembly space.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A linear peristaltic pump head with easy tube replacement includes a base. A DC motor is fixedly installed at the bottom of the base by several pan head screws. A wheel frame is fixedly installed at the output end of the DC motor. Several rollers are rotatably installed inside the wheel frame via small shafts. A connecting frame is fixedly installed on one side of the upper surface of the base. An upper support is installed at the upper end of the connecting frame by several first self-tapping screws.

[0009] Two first protrusions and two second protrusions are respectively installed at both ends of the upper surface of the base. A pressure block is rotatably installed between the two second protrusions. A pipe connector buckle is respectively provided on the upper surface of the two first protrusions. A pipe connector seat is provided between the first and second protrusions. A flexible hose is provided inside the pipe connector seat.

[0010] Both ends of the hose are equipped with cable ties and connectors, and the connectors are interlocked with the connector base.

[0011] Preferably, each of the first protrusions has a groove at its upper end, and the inner walls of the groove are respectively provided with snap-fit ​​surfaces on both sides. A cantilever is provided in the middle of the groove, and an elastic protrusion is provided at the upper end of the cantilever.

[0012] Preferably, the pipe fitting buckle includes a sliding buckle, which is disposed inside the slide groove and is limited to the buckle mating surface. A positioning buckle for locking the fitting is extended on one side of the sliding buckle, and a lever is provided at the upper end of the sliding buckle.

[0013] Preferably, the bottom of the sliding buckle is provided with a first fixing groove and a second fixing groove, both of which are matched with the elastic protrusion for limiting.

[0014] Preferably, the pressure block has a first pressure block end face and a second pressure block end face at both ends, the bottom of the pressure block is set as a pressure block plane, the upper surface of the base is set with a base plane, and the pressure block plane is in contact with the base plane.

[0015] Preferably, one of the second protruding surfaces is provided with a first base end face, the first base end face being rotatably connected to the first pressure block end face, and the other second protruding surface is provided with a second base end face, the second base end face being attached to one side of the second pressure block end face.

[0016] Preferably, the second base end face is provided with rotating holes at the upper and lower ends, and a rotating shaft is rotatably installed inside the rotating holes. A pressure block buckle is provided on the outer side of the upper and lower rotating shafts. The pressure block buckle fits against the other side of the second pressure block end face, and the pressure block buckle cooperates with the second base end face to limit and fix the second pressure block end face.

[0017] Preferably, a second self-tapping screw is provided inside the end face of the first base, and the upper end of the second self-tapping screw is attached to the upper end face of the first pressure block.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The pump head assembly process is simple and requires no tools, which improves production efficiency.

[0020] (2) It is convenient to replace the pump pipe, with a large operating space, and can be operated by hand without tools.

[0021] (3) The structure is stable, which solves the problems of hose misalignment and abnormal wear, and avoids the risk of pipe joint detachment.

[0022] (4) The pump head has a compact structure and a small operating space for changing pipes, which reduces the space required for pump head layout. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is an exploded view of the overall structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the compact;

[0026] Figure 4 This is a three-dimensional structural diagram of the compact from another perspective;

[0027] Figure 5 This is a three-dimensional structural diagram of the base;

[0028] Figure 6 A three-dimensional structural diagram of the base from another perspective;

[0029] Figure 7 This is a partial structural diagram of 203;

[0030] Figure 8 A three-dimensional structural diagram of the pipe fitting clip;

[0031] Figure 9 A bottom view of the pipe fitting clip structure;

[0032] Figure 10 This is a three-dimensional structural diagram of the pressure block latch;

[0033] Figure 11 This is a partial top view of the structure of this utility model;

[0034] Figure 12 for Figure 12 Schematic diagram of the cross-sectional structure at point AA;

[0035] Figure 13 This is a schematic diagram showing the opening of the pressure block of this utility model;

[0036] Figure 14 for Figure 13 Schematic diagram of the cross-sectional structure at point BB;

[0037] Figure 15 This is a schematic diagram of the pressure block closing according to the present invention;

[0038] Figure 16 for Figure 15 Schematic diagram of the cross-sectional structure at the CC section;

[0039] Figure 17 This is a schematic diagram of the pump head arrangement;

[0040] Figure 18 This is a top view of the structure of the second embodiment;

[0041] Figure 19 for Figure 18 Schematic diagram of the cross-sectional structure at point DD.

[0042] In the diagram: 1. DC motor; 2. Base; 201. Connector seat; 202. First protrusion; 2021. Slide groove; 2022. Snap-fit ​​surface; 2023. Cantilever; 2024. Elastic protrusion; 203. Second protrusion; 2031. First base end face; 2032. Second base end face; 2033. Rotating hole; 204. Base plane; 205. Connecting bracket; 3. Pan head screw; 4. Pipe connector snap-fit; 401. Sliding clip 402. First fixing groove; 403. Second fixing groove; 404. Pulling block; 405. Positioning buckle; 5. Pressure block buckle; 501. Rotating shaft; 6. Pressure block; 601. First pressure block end face; 602. Second pressure block end face; 603. Pressure block plane; 7. Connector; 8. Cable tie; 9. Flexible hose; 10. Roller; 11. Small shaft; 12. Wheel frame; 13. Upper support; 14. First self-tapping screw; 15. Second self-tapping screw. Detailed Implementation

[0043] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0044] like Figures 1 to 17 As shown, a linear peristaltic pump head with convenient tube replacement includes a base 2. A DC motor 1 is fixedly installed at the bottom of the base 2 by several pan head screws 3. A wheel frame 12 is fixedly installed at the output end of the DC motor 1. Several rollers 10 are rotatably installed inside the wheel frame 12 through a small shaft 11. A connecting frame 205 is fixedly installed on one side of the upper surface of the base 2. An upper support 13 is installed at the upper end of the connecting frame 205 by several first self-tapping screws 14.

[0045] Two first protrusions 202 and two second protrusions 203 are respectively installed on both ends of the upper surface of the base 2. A pressure block 6 is rotatably installed between the two second protrusions 203. A pipe connector buckle 4 is respectively provided on the upper surface of the two first protrusions 202. A pipe connector seat 201 is provided between the first protrusions 202 and the second protrusions 203. A hose 9 is provided inside the pipe connector seat 201.

[0046] Both ends of the hose 9 are equipped with cable ties 8 and connectors 7, and the connectors 7 are interlocked with the connector seat 201.

[0047] By starting the DC motor 1, the wheel frame 12 is driven to rotate. The roller 10 rotates and the pressure block 6 squeezes the hose 9 together. When the hose 9 is squeezed and released repeatedly, negative pressure is generated to transport the liquid.

[0048] In this embodiment, each first protrusion 202 has a sliding groove 2021 at its upper end, and a snap-fit ​​surface 2022 is provided on both sides of the inner wall of the sliding groove 2021. A cantilever 2023 is provided in the middle of the sliding groove 2021, and an elastic protrusion 2024 is provided at the upper end of the cantilever 2023.

[0049] In this embodiment, the pipe connector buckle 4 includes a sliding buckle 401, which is disposed inside the slide groove 2021 and is limited to the buckle mating surface 2022. A positioning buckle 405 for locking the connector 7 is provided on one side of the sliding buckle 401, and a toggle block 404 is provided at the upper end of the sliding buckle 401.

[0050] The sliding buckle 401 has a first fixing groove 402 and a second fixing groove 403 at its bottom, and both the first fixing groove 402 and the second fixing groove 403 are matched with the elastic protrusion 2024 for limiting.

[0051] In this embodiment, the two ends of the pressure block 6 are respectively provided with a first pressure block end face 601 and a second pressure block end face 602, the bottom of the pressure block 6 is provided with a pressure block plane 603, the upper surface of the base 2 is provided with a base plane 204, and the pressure block plane 603 is in contact with the base plane 204.

[0052] One of the second protrusions 203 has a first base end face 2031 on its surface, and the first base end face 2031 is rotatably connected to the first pressure block end face 601. The other second protrusion 203 has a second base end face 2032 on its surface, and the second base end face 2032 is attached to one side of the second pressure block end face 602.

[0053] In this embodiment, the upper and lower ends of the second base end face 2032 are respectively provided with rotating holes 2033. A rotating shaft 501 is rotatably installed inside the rotating holes 2033. A pressure block buckle 5 is provided on the outer side of the upper and lower rotating shafts 501. The pressure block buckle 5 fits against the other side of the second pressure block end face 602. The pressure block buckle 5 cooperates with the second base end face 2032 to limit and fix the second pressure block end face 602.

[0054] In this embodiment, a second self-tapping screw 15 is provided inside the first base end face 2031, and the upper end of the second self-tapping screw 15 is attached to the upper end of the first pressure block end face 601.

[0055] The working principle of this type of linear peristaltic pump head that allows for easy pipe replacement:

[0056] I. Installation and Operation Method of Pipe Fitting Clip 4

[0057] 1. Pipe fitting 7 assembly method:

[0058] Assemble the corresponding connectors 7 at both ends of the hose 9 of the corresponding length, and then insert the two straight surfaces of the connectors 7 into the corresponding connector seats 201 on the base 2. Use the four sides of the connector seats 201 to fix the hose 9 to prevent it from being stretched or twisted.

[0059] 2. Pipe fitting clip 4 structural and functional description:

[0060] Sliding buckle 401: Vertical constraint positioning and movement direction guidance.

[0061] Positioning buckle 405: Engages with the corresponding rib on the base 2 to prevent operator error, i.e., performing pipe replacement without properly positioning the pipe connector 7 clip. It also prevents the pipe connector 7 fixing component from shaking under normal engagement conditions.

[0062] Elastic protrusion 2024: The cantilever 2023 increases elasticity, and when mated, the elastic protrusion 2024 is sufficiently large to fit with the first fixing groove 402 and the second fixing groove 403, while ensuring smooth sliding of the pipe joint 7 fixing component and good feel.

[0063] 3. Assembly method of pipe fitting clip 4:

[0064] Install the pipe connector clip 4 onto the base within the slide groove 2021, vertically. The edge of the pipe connector clip 4 with the triangular mark is flush with the corresponding edge of the base 2. The pipe connector clip 4 engages with the inner plane of the slide groove 2021. Vertical positioning is achieved by the sliding clip 401 engaging with the top surface of the clip engagement surface 2022 inside the slide groove 2021. Front and rear positioning is achieved by the engagement of the first fixing groove 402 and the second fixing groove 403 with the elastic protrusion 2024. The lower end face of the pipe connector clip 4 blocks the connector 7 to prevent the connector from jumping out.

[0065] 4. Procedure for replacing the hose (9 steps)

[0066] Simply push the pipe connector clip 4 in the direction indicated by the arrow, and the pipe connector clip 4 will slide from one end to the other, and then the pipe connector 7 will be vertically removed from the corresponding pipe connector 201 in the base 2.

[0067] Operate in the reverse order, assemble the hose connector 7 into the inner pipe connector buckle 4 of the pipe connector seat 201, and push it in the opposite direction as described above. The pipe connector fastener will slide back from the other end to one end.

[0068] II. Installation and Operation Methods of Pressure Block 6 and Pressure Block Clip 5

[0069] 1. Installation instructions for pressure block clip 5:

[0070] Push the pressure block buckle 5 along the guide groove in the corresponding second base end face 2032 of the base 2. By deforming the pressure block buckle 5, the rotating shaft 501 of the pressure block buckle 5 is inserted into the corresponding rotating hole 2033 on the base 2.

[0071] 2. Installation instructions for pressure block 6:

[0072] The protrusion on the pressure block 6 matches the notch on the base 2. The pressure block 6 needs to be rotated by an angle (≥10°) and the shaft hole of the first pressure block end face 601 on the pressure block 6 should be pressed down along the rotation axis of the first base end face 2031 on the base 2.

[0073] 3. Tube replacement operation procedure:

[0074] Nine ways to remove old hoses:

[0075] a. Move the pipe fitting clip from position 1 to position 2;

[0076] b. Press down on one side of the pressure block buckle 5, and move it counterclockwise from position "1" to position "2". The protrusion on the pressure block buckle 5 will gradually disengage, and the groove on the pressure block 6 will open.

[0077] c. Rotate the pressure block 6 clockwise by a certain angle (≥10°);

[0078] d. Remove the hose connector 7 from the connector 201.

[0079] Nine methods for assembling the new hose:

[0080] a. The pipe fitting 7 is installed into the pipe fitting 201.

[0081] b. Move the pipe fitting clip 4 from position "2" back to position "1";

[0082] c. Rotate block 6 counterclockwise until it returns to its original position;

[0083] d. Move the pressure block latch 5 from position "2" back to position "1".

[0084] 4. Description of the double-sided bridge structure of pressure block 6 and base 2

[0085] One side of the pressure block 6 has a pressure block plane 603 in contact with the base plane 204; on the other end face, one side has a first pressure block end face 601 of the pressure block 6 engaging with the first base end face 2031 on the base 2, and the other side has a second pressure block end face 602 of the pressure block 6 engaging with the second base end face 2032 on the base 2. This structure effectively prevents the pressure block from flipping during pump head operation, which would cause the working arc surface to be non-perpendicular to the base, resulting in uneven gap between the working arc surface and the roller 10, causing the hose 9 to deviate.

[0086] III. Pump Body Arrangement Instructions

[0087] The pump bodies are arranged symmetrically, which can effectively save operating space.

[0088] The minimum angle at which the pressure block 6 can rotate outward is 10°. In situations where space is limited, the pressure block 6 can be removed directly, thus maintaining a small installation space for adjacent pump heads.

[0089] If there is sufficient space in the actual operation, and it is not necessary to remove the pressure block, the pressure block 6 can be removed by using the second self-tapping screw 15 with the screw head restricting the removal of the pressure block 6.

[0090] Beneficial effects of the plan:

[0091] 1. Simplified assembly process

[0092] The assembly process for all parts of the pump head is simple and can be done entirely manually without tools, thus reducing assembly time.

[0093] 2. Easy to replace tubes

[0094] Simply turn the pressure block clip 5 by hand, rotate the pressure block 6, and then move the pipe connector clip 4 to complete the hose replacement operation 9. This is a manual operation that requires no tools and saves time.

[0095] 3. Solved the problem of pipe fitting 7 easily coming off, avoiding the risk of hose 9 running off and rubbing. Pipe fitting buckle 4 effectively avoids the risk of pipe fitting 7 coming off from the pipe fitting seat 201;

[0096] The double-sided bridge structure of the pressure block 6 effectively prevents the pressure block 6 from overturning, ensures the consistency of the gap between the pressure block 6 and the hose 9, and prevents the hose 9 from running off-center and rubbing against the tube during the operation of the pump head.

[0097] 4. Small footprint

[0098] The width and dimensions of this structural design, both when open, are smaller than other designs. Under the same conditions, other rotating pressure block structures increase the width by approximately 14mm, while the distance between the two pump heads in this design is only 5mm. Distributed evenly across each pump head, the length increase is only 2.5mm, improving space utilization and increasing the number of pump heads per unit area.

[0099] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A linear peristaltic pump head with convenient tube replacement, comprising a base (2), characterized in that: A DC motor (1) is fixedly installed at the bottom of the base (2) by several pan head screws (3). A wheel frame (12) is fixedly installed at the output end of the DC motor (1). Several rollers (10) are rotatably installed inside the wheel frame (12) through a small shaft (11). A connecting frame (205) is fixedly installed on one side of the upper surface of the base (2). An upper support (13) is installed at the upper end of the connecting frame (205) by several first self-tapping screws (14). The base (2) has two first protrusions (202) and two second protrusions (203) installed at both ends of its upper surface. A pressure block (6) is rotatably installed between the two second protrusions (203). A pipe connector buckle (4) is provided on the upper surface of the two first protrusions (202). A pipe connector seat (201) is provided between the first protrusions (202) and the second protrusions (203). A hose (9) is provided inside the pipe connector seat (201). Both ends of the hose (9) are respectively provided with cable ties (8) and connectors (7), and the connectors (7) are interlocked with the connector seat (201).

2. A straight line peristaltic pump head with easy tube replacement according to claim 1, characterized in that: Each of the first protrusions (202) has a groove (2021) at its upper end. The inner walls of the groove (2021) are provided with snap-fit ​​surfaces (2022) on both sides. A cantilever (2023) is provided in the middle of the groove (2021). An elastic protrusion (2024) is provided at the upper end of the cantilever (2023).

3. A straight line peristaltic pump head with easy tube change according to claim 2, characterized in that: The pipe fitting buckle (4) includes a sliding buckle (401), which is located inside the slide groove (2021) and is limited to the buckle mating surface (2022). A positioning buckle (405) for locking the connector (7) is provided on one side of the sliding buckle (401), and a lever (404) is provided at the upper end of the sliding buckle (401).

4. A straight line peristaltic pump head with easy tube replacement according to claim 3, characterized in that: The bottom of the sliding buckle (401) is provided with a first fixing groove (402) and a second fixing groove (403), and the first fixing groove (402) and the second fixing groove (403) are respectively matched with the elastic protrusion (2024) for limiting.

5. The straight line peristaltic pump head of claim 1, wherein: The pressure block (6) is provided with a first pressure block end face (601) and a second pressure block end face (602) at both ends, the bottom of the pressure block (6) is provided with a pressure block plane (603), and the upper surface of the base (2) is provided with a base plane (204). The pressure block plane (603) and the base plane (204) are in contact.

6. A straight line peristaltic pump head of the change tube easy type according to claim 5, characterized in that: One of the second protrusions (203) has a first base end face (2031) on its surface, and the first base end face (2031) is rotatably connected to the first pressure block end face (601). The other second protrusion (203) has a second base end face (2032) on its surface, and the second base end face (2032) is attached to one side of the second pressure block end face (602).

7. A straight line peristaltic pump head of the change tube easy type according to claim 6, characterized in that: The second base end face (2032) is provided with rotating holes (2033) at the upper and lower ends respectively. A rotating shaft (501) is rotatably installed inside the rotating hole (2033). A pressure block buckle (5) is provided on the outer side of the upper and lower rotating shafts (501). The pressure block buckle (5) fits against the other side of the second pressure block end face (602). The pressure block buckle (5) cooperates with the second base end face (2032) to limit and fix the second pressure block end face (602).

8. A linear peristaltic pump head with convenient pipe replacement according to claim 6, characterized in that: The first base end face (2031) is provided with a second self-tapping screw (15), and the upper end of the second self-tapping screw (15) is attached to the upper end of the first pressure block end face (601).

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