Peristaltic pump structure with a cover

Abstract

The utility model discloses a peristaltic pump structure with cover, including pump main body, be equipped with the casing on the pump main body, the top opening of casing, be equipped with the cover at the opening, the casing forms the mounting end surface at the opening, the recess is seted up on the mounting end surface, the mounting end surface extends the limit protruding at the recess top one side, the side of recess away from limit protruding is the spigot, be equipped with the boss on the cover, the end of boss is bent down and forms the buckle part, the boss is inserted to the recess from the spigot, then through the rotation cover and drive the buckle part rotation to limit protruding bottom to the limit protruding and buckle part form axial limit, the utility model discloses the cover is not only convenient to assemble and disassemble, and is very stable after installing, and the whole structure is simple and easy to realize.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm pump technology, and in particular to a peristaltic pump structure with a cover. Background Technology

[0002] A peristaltic pump is a liquid delivery device with controllable flow rate. Commonly, it works by repeatedly compressing an elastic tube to move the contents in a specific direction; the flow rate is determined by the tube diameter and the compression speed. It is used in systems such as liquid chromatography and perfusion. Fluid is pumped by alternately squeezing and releasing the pump's elastic delivery tube. Like squeezing a tube with two fingers, as the fingers move, a negative pressure is created inside the tube, causing the liquid to flow. A peristaltic pump forms a "pillow" shape of fluid in a section of pump tubing between two rotating rollers. Because the fluid only contacts the pump tubing and not the pump body, there is no contamination of the fluid, making it widely used in industry. The main structure of peristaltic pumps on the market includes a motor, a roller assembly, a hose, and a connector. The roller assembly is installed inside the housing, and the motor is connected to the roller assembly to drive it to rotate. The hose is also installed inside the housing and is compressed by the roller assembly. To facilitate the installation and removal of the roller assembly and hose, the top of the housing is usually designed as an opening, and a cover is installed at the opening. Therefore, the connection between the cover and the housing is particularly important. The cover must not only be easy to install and remove, but also be stable and not misaligned after installation. Summary of the Invention

[0003] The purpose of this invention is to design a peristaltic pump structure with a cover to overcome the shortcomings of the above-mentioned technology.

[0004] This utility model designs a peristaltic pump structure with a cover, including a pump body, a housing on the pump body, a roller assembly and a hose inside the housing, the roller assembly being driven to rotate within the housing, the hose being wound around the outside of the roller assembly, the two ends of the hose extending to the housing to form interfaces, the top of the housing being open, and a cover being provided at the opening, the housing forming an installation end face at the opening, a groove being formed on the installation end face, a limiting protrusion extending from one side of the top of the groove, the side of the groove away from the limiting protrusion being an insertion port, a protrusion being provided on the cover, the downward end of the protrusion being bent to form a snap-fit ​​part, the protrusion being inserted into the groove from the insertion port, and then the snap-fit ​​part being rotated to the bottom of the limiting protrusion by rotating the cover, thereby making the limiting protrusion and the snap-fit ​​part axially limited.

[0005] Preferably, the rolling core assembly includes a rolling core frame and rollers. The rollers are rotatably connected to the rolling core frame via a connecting shaft. At least two rollers are equidistantly distributed in a ring along the rolling core frame. The end of the rolling core frame passes through the housing and extends into the pump body, where it is connected to a motor inside the pump body.

[0006] Further optimization involves the roller frame comprising a top plate, a bottom plate, and a connecting column. The connecting column connects the top plate and the bottom plate. The edges of the top plate and the bottom plate are provided with snap-fit ​​grooves, and the two ends of the connecting shaft are respectively snapped into the snap-fit ​​grooves of the top plate and the bottom plate to form a connection.

[0007] Further optimization involves inserting the top of the roller holder into the positioning hole.

[0008] Preferably, the bottom surface of the cover is provided with an annular protrusion, which abuts against the inner peripheral wall of the housing after being inserted into the housing.

[0009] Further optimization involves extending a limiting protrusion downwards from the lower end of the annular protrusion near the interface, with the limiting protrusion approaching or contacting the hose at the interface to limit the hose.

[0010] Further optimization involves providing a positioning post at the center of the annular convex edge on the bottom surface of the cover, with the positioning hole located at the end of the positioning post, and reinforcing ribs arranged radially around the positioning post between the inner wall of the annular convex edge and the outer wall of the positioning post.

[0011] Preferably, the plurality of grooves are evenly distributed circumferentially along the mounting end face, and the protrusions are provided in a one-to-one correspondence with the grooves.

[0012] Preferably, the cover has a backing plate on the side of the protrusion away from the limiting protrusion. The backing plate abuts against the side of the cover to prevent the protrusion from rotating excessively toward the limiting protrusion and hitting the inner wall of the groove, which would cause the protrusion to bend.

[0013] Preferably, the mounting end face is provided with a mounting hole, a positioning pin is inserted into the mounting hole, the top end of the positioning pin is a hemispherical end, and the cover body is provided with a hemispherical concave hole that forms a limiting position with the hemispherical end.

[0014] The technical advantage of this utility model is that the mounting end face of the shell is provided with a groove with a limiting protrusion, and the cover is provided with a protrusion with a buckle. The protrusion is inserted into the groove and rotated to make the buckle and the limiting protrusion form an axial limit. At this time, the cover is connected to the shell. When the cover is rotated in the opposite direction, the buckle rotates to be misaligned with the limiting protrusion and makes limiting contact, so the cover can be detached from the shell. Therefore, the cover is not only easy to install and remove, but also very stable after installation. The overall structure is simple and easy to implement. Attached Figure Description

[0015] Figure 1 This is a 3D view of the overall structure of a peristaltic pump.

[0016] Figure 2 This is an exploded view of the peristaltic pump.

[0017] Figure 3 It is an exploded view of the cover and shell structure.

[0018] Figure 4 This is a cross-sectional view of the peristaltic pump.

[0019] Figure 5 This is a diagram of the bottom structure of the cover.

[0020] In the diagram: 1. Pump body; 2. Housing; 21. Mounting end face; 22. Groove; 221. Limiting protrusion; 222. Insert; 23. Mounting hole; 24. Positioning pin; 241. Hemispherical end; 3. Roller assembly; 31. Roller frame; 311. Top plate; 312. Bottom plate; 313. Connecting column; 314. Snap-fit ​​groove; 32. Roller; 33. Connecting shaft; 4. Hose; 5. Interface; 6. Cover; 61. Protrusion; 62. Snap-fit ​​part; 63. Positioning hole; 64. Annular protrusion; 65. Limiting protrusion; 66. Positioning column; 67. Reinforcing rib; 68. Backing plate; 69. Hemispherical concave hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0022] This utility model includes a pump body 1, which contains components such as a motor and gear set. A housing 2 is located on the top of the pump body 1. A roller assembly 3 and a hose 4 are located inside the housing 2. The roller assembly 3 is connected to the motor of the pump body 1 via a transmission connection. The roller assembly 3 is rotatably connected inside the housing 2, and the motor drives the roller assembly 3 to rotate within the housing 2. The hose 4 is wound around the outside of the roller assembly 3, and both ends of the hose 4 extend to the housing 2 to form interfaces 5, namely, an inlet interface 5 and an outlet interface 5. The top of the housing 2 is open, and a cover 6 is provided at the opening. A mounting end face 21 is formed at the opening of the housing 2. The mounting end face 21 is the end face of the top of the housing 2. A groove 22 is formed on the mounting end face 21. A limiting protrusion 221 extends from one side of the top of the groove 22. The limiting protrusion 221 is located at one end of the groove 22 and is spaced apart from the groove 22, that is, the distance between the top of the groove 22 and the inner wall of the groove 22. 2. The side away from the limiting protrusion 221 is the insertion port 222. The cover 6 has a protrusion 61. The downward end of the protrusion 61 is bent to form a latching part 62. That is, the protrusion 61 is inserted into the insertion port 222. Then, the cover 6 is rotated, and the cover 6 drives the protrusion 61 to rotate. The protrusion 61 rotates from the insertion port 222 to the gap between the top of the groove 22 and the inner wall of the groove 22. The gap between the top of the groove 22 and the inner wall of the groove 22 forms a slot. 1. Rotate into the slot, and the latch 62 is located at the bottom of the limiting protrusion 221, so that the limiting protrusion 221 and the latch 62 form an axial limit, so that the cover 6 will not axially separate from the housing 2. When the housing 2 and the cover 6 need to be separated, simply rotate the cover 6 in the opposite direction. The cover 6 drives the protrusion 61 to rotate in the opposite direction. The protrusion 61 rotates to enter the insertion port 222 from the slot. In this way, the protrusion 61 and the latch 62 can leave from the insertion port 222, and the cover 6 can be disassembled.

[0023] Furthermore, the roller assembly 3 includes a roller frame 31 and rollers 32. The rollers 32 are rotatably connected to the roller frame 31 via a connecting shaft 33. At least two rollers 32 are equidistantly distributed in a ring along the roller frame 31. The end of the roller frame 31 passes through the housing 2 and extends into the pump body 1 and is connected to the motor inside the pump body 1. The rollers 32 rotate with the roller frame 31 and rotate relative to the roller frame 31. Therefore, when the rollers 32 rotate to the position where the hose 4 is tangent to the roller frame 31, the peripheral wall of the rollers 32 presses against and squeezes the outer wall of the hose 4 at this position, thereby controlling the flow rate inside the hose 4.

[0024] Furthermore, the roller frame 31 includes a top plate 311, a bottom plate 312, and a connecting column 313. The connecting column 313 connects the top plate 311 and the bottom plate 312. The top plate 311 and the bottom plate 312 are provided with snap-fit ​​grooves 314 at opposite positions on their edges. The two ends of the connecting shaft 33 are snapped into the snap-fit ​​grooves 314 of the top plate 311 and the bottom plate 312 respectively to form a connection. The snap-fit ​​grooves 314 greatly facilitate the loading and unloading of the connecting shaft 33.

[0025] Furthermore, a positioning hole 63 is provided at the center of the bottom of the cover 6. The bottom end of the roller frame 31 passes through the housing 2 and is connected to the pump body 1. The top end of the roller frame 31 is inserted into the positioning hole 63, so that the roller frame 31 can rotate stably inside the housing 2.

[0026] Furthermore, the bottom surface of the cover 6 is provided with an annular protrusion 64, which extends downward and inserts into the housing 2, and then abuts against the inner peripheral wall of the housing 2, so that the cover 6 can be more stable relative to the housing 2.

[0027] Furthermore, the lower end of the annular protrusion 64 extends downward to form a limiting protrusion 65 near the interface 5. The end face of the limiting protrusion 65 is rounded. The limiting protrusion 65 is close to or in contact with the hose 4 at the interface 5 to limit the hose 4 at the interface 5, preventing the hose 4 from becoming misaligned after long-term use. The rounded surface will not damage the hose 4. At the same time, the limiting protrusion 65 is located at the opening of the U-shaped movement of the hose 4, which allows the annular protrusion 64 to extend further into the housing 2, making the cover 6 more stable.

[0028] Furthermore, a positioning post 66 is provided at the center of the annular protrusion 64 on the bottom surface of the cover 6, and a positioning hole 63 is opened at the end of the positioning post 66. A reinforcing rib 67 is provided between the inner wall of the annular protrusion 64 and the outer wall of the positioning post 66, with the positioning post 66 as the center. The top of the reinforcing rib 67 is connected to the cover 6, and the front and rear ends of the reinforcing rib 67 are connected to the inner wall of the annular protrusion 64 and the outer wall of the positioning post 66. This not only strengthens the overall strength of the cover 6, but also reinforces the strength of the positioning post 66.

[0029] Furthermore, multiple grooves 22 are evenly distributed circumferentially along the mounting end face 21, and protrusions 61 are set one-to-one with the grooves 22, so that multiple snap-fit ​​points are formed on the mounting end face 21, making the cover 6 and the shell 2 more stable after snap-fit ​​connection.

[0030] Furthermore, the cover 6 has a backing plate 68 on the side of the protrusion 61 away from the limiting protrusion 221. The backing plate 68 extends from the bottom surface of the cover 6 and abuts against the side of the cover 6 or forms an integral connection with the cover 6, thereby strengthening the protrusion 61. When the protrusion 61 rotates excessively toward the limiting protrusion 221 and hits the inner wall of the groove 22, the protrusion 61 is prone to bending or even breaking. The backing plate 68 blocks the other side of the protrusion 61 and can prevent the protrusion 61 from bending. It should be noted that the backing plate 68 is connected to the bottom surface of the cover 6 at the front and back, making the backing plate 68 itself more firm and stable.

[0031] Furthermore, the mounting end face 21 is also provided with a mounting hole 23, and a positioning pin 24 is inserted into the mounting hole 23. The top end of the positioning pin 24 is a hemispherical end 241. The cover body 6 is provided with a hemispherical concave hole that forms a limit with the hemispherical end 241. This plays a certain positioning role after the cover body 6 is rotated and connected to the shell 2, preventing the cover body 6 from being misaligned relative to the shell 2.

[0032] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A peristaltic pump structure with a cover, characterized in that, The pump includes a pump body (1), on which a housing (2) is provided. A roller assembly (3) and a hose (4) are provided inside the housing (2). The roller assembly (3) is connected to the pump body (1) to rotate within the housing (2). The hose (4) is wrapped around the outside of the roller assembly (3). Both ends of the hose (4) extend to the housing (2) to form interfaces (5). The top of the housing (2) is open, and a cover (6) is provided at the opening. The housing (2) has a mounting end face (21) at the opening, and a recess is provided on the mounting end face (21). The groove (22) has a mounting end face (21) extending a limiting protrusion (221) on one side of the top of the groove (22). The side of the groove (22) away from the limiting protrusion (221) is a socket (222). The cover (6) is provided with a protrusion (61). The downward end of the protrusion (61) is bent to form a buckle (62). The protrusion (61) is inserted into the groove (22) from the socket (222). Then, by rotating the cover (6), the buckle (62) is rotated to the bottom of the limiting protrusion (221), so that the limiting protrusion (221) and the buckle (62) form an axial limit.

2. The peristaltic pump structure with a cover according to claim 1, characterized in that, The rolling core assembly (3) includes a rolling core frame (31) and rollers (32). The rollers (32) are rotatably connected to the rolling core frame (31) via a connecting shaft (33). At least two rollers (32) are equidistantly distributed in a ring along the rolling core frame (31). The end of the rolling core frame (31) passes through the housing (2) and extends into the pump body (1) and is connected to the motor inside the pump body (1) for transmission.

3. The peristaltic pump structure with a cover according to claim 2, characterized in that, The roller frame (31) includes a top plate (311), a bottom plate (312), and a connecting column (313). The connecting column (313) connects the top plate (311) and the bottom plate (312). The top plate (311) and the bottom plate (312) have snap-fit ​​grooves (314) at opposite positions on their edges. The two ends of the connecting shaft (33) are snapped into the snap-fit ​​grooves (314) of the top plate (311) and the bottom plate (312) respectively to form a connection.

4. The peristaltic pump structure with a cover according to claim 3, characterized in that, The bottom center of the cover (6) is provided with a positioning hole (63). The bottom end of the roller frame (31) passes through the housing (2) and is connected to the pump body (1). The top end of the roller frame (31) is inserted into the positioning hole (63).

5. The peristaltic pump structure with a cover according to claim 4, characterized in that, The bottom surface of the cover (6) is provided with an annular protrusion (64), which abuts against the inner peripheral wall of the shell (2) after being inserted into the shell (2).

6. The peristaltic pump structure with a cover according to claim 5, characterized in that, The lower end of the annular protrusion (64) extends downward to form a limiting protrusion (65) near the interface (5). The limiting protrusion (65) is close to or in contact with the hose (4) at the interface (5) to limit the hose (4).

7. The peristaltic pump structure with a cover according to claim 5, characterized in that, On the bottom surface of the cover (6), a positioning post (66) is provided at the center of the annular protrusion (64). The positioning hole (63) is opened at the end of the positioning post (66). A reinforcing rib (67) is provided between the inner wall of the annular protrusion (64) and the outer wall of the positioning post (66) in a radial pattern centered on the positioning post (66).

8. The peristaltic pump structure with a cover according to claim 1, characterized in that, Multiple grooves (22) are evenly distributed circumferentially along the mounting end face (21), and the protrusions (61) are arranged in a one-to-one correspondence with the grooves (22).

9. The peristaltic pump structure with a cover according to claim 1, characterized in that, The cover (6) has a backing plate (68) on the side of the protrusion (61) away from the limiting protrusion (221). The backing plate (68) abuts against the side of the cover (6) to prevent the protrusion (61) from rotating excessively toward the limiting protrusion (221) and hitting the inner wall of the groove (22), causing the protrusion (61) to bend.

10. A peristaltic pump structure with a cover according to claim 1, characterized in that, The mounting end face (21) is also provided with a mounting hole (23), and a positioning pin (24) is inserted into the mounting hole (23). The top end of the positioning pin (24) is a hemispherical end (241), and the cover (6) is provided with a hemispherical concave hole that forms a limit with the hemispherical end (241).

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