A low pulse peristaltic pump head

Abstract

The utility model provides a low-pulse peristaltic pump head, which relates to the technical field of fluid machinery, including a half shell, two upper shells and two adjusting devices. The half shell and the two upper shells constitute a complete shell of the pump head, and both walls of the inner cavity of the half shell are installed with fixed plates. The two adjusting devices are movably installed on the two half shells respectively. The limit block on one side of the separation block rotates in the arc groove of the fixed plate to release the limit, the upper shell is removed, the hose is inserted from the half shell, the upper shell is covered to the top of the half shell, and the separation block is rotated by a lifting rod. The limit block moves accordingly and is engaged when it rotates in a semi-cylindrical shape. The height of the upper pressure block is adjusted by adjusting the adjusting bolt to squeeze the hose, and the elastic part is extended and retracted. The utility model provides a low-pulse peristaltic pump head. By adjusting the separation block, the pump head can meet the needs of various types of hoses and quickly realize various combinations of hoses, and can realize rapid opening and closing and disassembly to complete rapid replacement of the hose.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid machinery, in particular to a low-pulse peristaltic pump head. Background Art

[0002] A low-pulse peristaltic pump head is a pump head device used for fluid delivery. It adopts the working principle of a peristaltic pump and promotes fluid flow by compressing and releasing an elastic tube. It has the characteristics of low pulse and accurate metering. A low-pulse peristaltic pump head usually consists of a compression component and a pump head. The compression component can be a piston-driven pressure device or a pneumatically driven peristaltic pump head, and the pump head is wrapped in an elastic hose or pipe. The liquid flow is promoted by continuously compressing and releasing the hose to achieve the purpose of fluid delivery.

[0003] The existing low-pulse peristaltic pump head realizes liquid flow transmission by setting a pressure plate in the shell, and squeezing the hose entering the shell through the pressure plate and roller. However, for different types of hoses, some hoses have a small diameter, and the pressure plate fixed in the shell cannot contact the hose. When the roller rotates, the liquid is not easy to flow. For hoses with larger diameters, the pressure plate will keep squeezing the outer wall of the hose. Long-term squeezing will cause certain damage to the outer wall of the hose, and the operation is more cumbersome when replacing the hose.

[0004] Therefore, it is necessary to provide a new low-pulse peristaltic pump head to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a low-pulse peristaltic pump head.

[0006] The low-pulse peristaltic pump head provided by the utility model comprises: a half shell, two upper shells and two adjusting devices, wherein the half shell and the two upper shells constitute a complete shell of the pump head, both walls of the inner cavity of the half shell are installed with fixing plates, and the two adjusting devices are movably installed on the two half shells respectively;

[0007] The adjusting device comprises an upper pressure block, a second rotating shaft, a bolt and two elastic members, the second rotating shaft is movably connected to a circular through hole set in the side wall of the inner cavity of the upper shell body, separation blocks are provided at both ends of the second rotating shaft, the two separation blocks are annular and are movably connected to the second rotating shaft, a lifting rod is fixedly installed on one side of the two separation blocks, and a limiting block is fixedly installed on the other side of the two separation blocks, the two limiting blocks are semi-cylindrical and are located in an arc groove set at one end of the two fixed plates, the upper pressure block is connected to one side of the second rotating shaft and is located under the upper shell body, the two elastic members are fixedly connected to the groove set at the top of the upper pressure block, and the bolt is movably connected to the top of the upper pressure block to adjust the upper pressure block.

[0008] Preferably, two fixing rings are fixedly mounted on one end of the upper pressing block, the two fixing rings are movably connected to the second rotating shaft, and a plurality of limiting rings are arranged on the second rotating shaft at both sides of the two fixing rings to limit the second rotating shaft.

[0009] Preferably, the elastic member includes a telescopic rod and a spring, one end of the telescopic rod is provided with a thread fixedly connected to the top of the upper pressure block, the other end of the telescopic rod is fixedly connected to the bottom of the upper shell, one end of the spring is fixedly connected to the top of the upper pressure block and the other end of the spring is fixedly connected to the bottom of the upper shell.

[0010] Preferably, a mounting hole is provided at the top of the upper shell for installing the bolt.

[0011] Preferably, two hose inlet and outlet grooves are provided at the front end and the rear end of the half shell.

[0012] Preferably, the inner cavity of the semi-shell is provided with a driving mechanism, and the driving mechanism includes a first rotating shaft, two rotating disks and a plurality of rollers, both ends of the first rotating shaft are movably connected to the two fixed plates through bearings, the first rotating shaft is fixedly connected to the two rotating disks, both ends of the plurality of rollers are movably connected to the opposite sides of the two rotating disks, and the plurality of rollers are evenly distributed on the two rotating disks.

[0013] Compared with the related art, the low-pulse peristaltic pump head provided by the utility model has the following beneficial effects:

[0014] The utility model provides a low-pulse peristaltic pump head. When the lifting rod is lifted upward, the limit block on one side of the separation block rotates in the arc-shaped groove of the fixed plate to release the limit. The upper shell is removed, and the hose is inserted from the semi-shell. The upper shell is covered to the top of the semi-shell and the separation block is rotated by the lifting rod. The limit block moves accordingly and is engaged when it rotates in a semi-cylindrical shape. The height of the upper pressure block is adjusted by adjusting the bolt to squeeze the hose, and the elastic part is extended and retracted. The utility model provides a low-pulse peristaltic pump head. By adjusting the separation block, the pump head can meet the needs of various types of hoses and quickly realize various combinations of hoses. It can also realize rapid opening and closing and disassembly, complete the rapid replacement of the hose, and the two upper pressure blocks can reduce pulse generation, so that the filling amount is more accurate and the stability is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a low-pulse peristaltic pump head provided by the utility model;

[0016] Figure 2 A schematic diagram of the structural disassembly of a low-pulse peristaltic pump head provided by the utility model;

[0017] Figure 3It is a schematic diagram of the structure of the upper housing and the adjusting device;

[0018] Figure 4 It is a schematic diagram of the structural disassembly of the upper shell and the adjustment device.

[0019] Numbers in the figure: 1, half shell; 2, upper shell; 3, hose inlet and outlet groove; 4, first rotating shaft; 5, turntable; 6, roller; 7, fixing plate; 8, lifting rod; 9, separation block; 10, limiting block; 11, upper pressure block; 12, second rotating shaft; 13, fixing ring; 14, limiting ring; 15, circular through hole; 16, telescopic rod; 17, spring; 18, bolt; 19, mounting hole. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0021] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 ,in, Figure 1 A schematic diagram of the structure of a low-pulse peristaltic pump head provided by the utility model; Figure 2 A schematic diagram of the structural disassembly of a low-pulse peristaltic pump head provided by the utility model; Figure 3 It is a schematic diagram of the structure of the upper housing and the adjusting device; Figure 4 It is a schematic diagram of the structural disassembly of the upper shell and the adjustment device.

[0022] In the specific implementation process, Figure 1-Figure 4 As shown, a low-pulse peristaltic pump head comprises: a half shell 1, two upper shells 2 and two adjusting devices, the half shell 1 and the two upper shells 2 constitute a complete shell of the pump head, both walls of the inner cavity of the half shell 1 are installed with fixing plates 7, and the two adjusting devices are movably installed on the two half shells 1 respectively;

[0023] The adjusting device includes an upper pressing block 11, a second rotating shaft 12, a bolt 18 and two elastic members. The second rotating shaft 12 is movably connected to a circular through hole 15 provided on the inner cavity side wall of the upper shell 2. Separation blocks 9 are provided at both ends of the second rotating shaft 12. The two separation blocks 9 are annular and are movably connected to the second rotating shaft 12. A lifting rod 8 is fixedly installed on one side of the two separation blocks 9. A limiting block 10 is fixedly installed on the other side of the two separation blocks 9. The two limiting blocks 10 are semi-cylindrical and are located in an arc-shaped groove provided at one end of the two fixing plates 7. The upper pressing block 11 is connected to the second rotating shaft 1 2 side and located below the upper shell 2, the two elastic members are fixedly connected to the groove set at the top of the upper pressing block 11, the bolt 18 is movably connected to the top of the upper pressing block 11 to adjust the upper pressing block 11, there is a phase difference between the two upper pressing blocks 11, the lifting rod 8 is lifted upward, the separation block 9 rotates, and the limit block 10 rotates in the arc groove set at one end of the fixed plate 7 to release the limit, one end of the telescopic rod 16 is provided with a thread fixedly connected to the top of the upper pressing block 11 and one end of the spring 17 is fixedly connected to the top of the upper pressing block 11, and the upper pressing block 11 is adjusted by adjusting the bolt 18 to squeeze the hose;

[0024] Two fixing rings 13 are fixedly installed at one end of the upper pressing block 11, and the two fixing rings 13 are movably connected to the second rotating shaft 12, and a plurality of limiting rings 14 are arranged on the second rotating shaft 12, which are located on both sides of the two fixing rings 13 to limit the positions thereof. The elastic member comprises a telescopic rod 16 and a spring 17, one end of the telescopic rod 16 is provided with a thread fixedly connected to the top of the upper pressing block 11, and the other end of the telescopic rod 16 is fixedly connected to the bottom end of the upper shell 2, one end of the spring 17 is fixedly connected to the top of the upper pressing block 11 and the other end of the spring 17 is fixedly connected to the bottom end of the upper shell 2;

[0025] The top of the upper shell 2 is provided with a mounting hole 19 for mounting a bolt 18. Two hose inlet and outlet grooves 3 are provided at the front and rear ends of the half shell 1. Fixing plates 7 are installed on both walls of the inner cavity of the half shell 1. A driving mechanism is provided in the inner cavity of the half shell 1. The driving mechanism includes a first rotating shaft 4, two rotating disks 5 and a plurality of rollers 6. Both ends of the first rotating shaft 4 are movably connected to the two fixing plates 7 through bearings. The first rotating shaft 4 is fixedly connected to the two rotating disks 5. Both ends of the plurality of rollers 6 are movably connected to the opposite side of the two rotating disks 5. The plurality of rollers 6 are evenly distributed on the two rotating disks 5. The first rotating shaft 4 is driven to rotate to rotate with the two rotating disks 5 and the plurality of rollers 6. The plurality of rollers 6 squeeze the hoses to transmit liquid respectively.

[0026] When a peristaltic pump transfers liquid, due to pressure and packaging issues, the liquid will produce foam after being pulsed, and even bubbles during filling. Figure 3 The positional relationship of the two upper pressing blocks 11 is recorded in the figure, and there are double pipelines on the roller 6. The cooperation between the upper pressing block 11 and the roller 6 balances the flow of the liquid and offsets the pulse, making the filling amount more accurate and more stable.

[0027] The working principle of the utility model is as follows: lift the lifting rod 8 upward, the separation block 9 rotates, the limit block 10 rotates in the arc groove provided at one end of the fixed plate 7, the upper shell 2 is removed, the hose enters the hose inlet and outlet groove 3 of the half shell 1, bypasses the roller 6 and then outputs, the upper shell 2 is covered to the top of the half shell 1, and the separation block 9 is rotated by the lifting rod 8. The limit block 10 moves accordingly and is semi-cylindrical and engages during rotation. One end of the telescopic rod 16 is provided with a thread fixedly connected to the top of the upper pressure block 11 and one end of the spring 17 is fixedly connected to the top of the upper pressure block 11. The adjustment bolt 18 is used to adjust the limit block 16. The height of the upper pressing block 11 is adjusted to squeeze the hose, and the telescopic rod 16 and the spring 17 at the top of the upper pressing block 11 are stretched to drive the first rotating shaft 4 to rotate with the two turntables 5 and multiple rollers 6. The multiple rollers 6 squeeze the hose to transmit the liquid respectively. The height of the upper pressing block 11 is adjusted by the bolt 18, so that the pump head can meet the needs of various types of hoses and can also quickly realize various combinations of hoses. The adjustment device and the drive assembly are used together to realize low-pulsation transmission of liquid and improve the accuracy. The rotation of the limit block 10 can realize rapid opening and disassembly, and complete the rapid replacement of the hose.

[0028] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0029] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A low pulse peristaltic pump head, characterized in that: include: A half shell (1), two upper shells (2) and two adjusting devices, wherein the half shell (1) and the two upper shells (2) constitute a complete shell of the pump head, both walls of the inner cavity of the half shell (1) are provided with fixing plates (7), and the two adjusting devices are movably mounted on the two half shells (1) respectively; The adjusting device comprises an upper pressing block (11), a second rotating shaft (12), a bolt (18) and two elastic members, wherein the second rotating shaft (12) is movably connected to a circular through hole (15) provided on the side wall of the inner cavity of the upper shell (2), separation blocks (9) are provided at both ends of the second rotating shaft (12), the two separation blocks (9) are annular and movably connected to the second rotating shaft (12), a lifting rod (8) is fixedly installed on one side of the two separation blocks (9), and a limiting block (10) is fixedly installed on the other side of the two separation blocks (9), the two limiting blocks (10) are semi-cylindrical and are located in an arc-shaped groove provided at one end of the two fixing plates (7), the upper pressing block (11) is connected to one side of the second rotating shaft (12) and is located below the upper shell (2), the two elastic members are fixedly connected to the groove provided at the top end of the upper pressing block (11), and the bolt (18) is movably connected to the top end of the upper pressing block (11) to adjust the upper pressing block (11).

2. The low-pulsation peristaltic pump head according to claim 1, characterized in that: Two fixing rings (13) are fixedly mounted on one end of the upper pressing block (11), the two fixing rings (13) are movably connected to the second rotating shaft (12), and a plurality of limiting rings (14) are arranged on the second rotating shaft (12) at both sides of the two fixing rings (13) to limit the second rotating shaft (12).

3. The low-pulse peristaltic pump head according to claim 2, characterized in that: The elastic member comprises a telescopic rod (16) and a spring (17); one end of the telescopic rod (16) is provided with a thread and is fixedly connected to the top end of the upper pressing block (11); the other end of the telescopic rod (16) is fixedly connected to the bottom end of the upper shell (2); one end of the spring (17) is fixedly connected to the top end of the upper pressing block (11) and the other end of the spring (17) is fixedly connected to the bottom end of the upper shell (2).

4. The low-pulse peristaltic pump head according to claim 3, characterized in that: The top end of the upper shell (2) is provided with a mounting hole (19) for mounting the bolt (18).

5. The low-pulse peristaltic pump head according to claim 4, characterized in that: The front end and the rear end of the half shell (1) are both provided with two hose inlet and outlet grooves (3).

6. The low-pulse peristaltic pump head according to claim 5, characterized in that: The inner cavity of the half shell (1) is provided with a driving mechanism, which comprises a first rotating shaft (4), two rotating disks (5) and a plurality of rollers (6); both ends of the first rotating shaft (4) are movably connected to the two fixed plates (7) via bearings; the first rotating shaft (4) is fixedly connected to the two rotating disks (5); both ends of the plurality of rollers (6) are movably connected to opposite sides of the two rotating disks (5); and the plurality of rollers (6) are evenly distributed on the two rotating disks (5).

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