Peristaltic pump

Abstract

The utility model provides a peristaltic pump, and belongs to the technical field of peristaltic pumps. The pump head comprises a pump head body, an upper pressing block and a lower support. The upper pressing block and the lower support are located on the same side of the pump head body. A positioning groove and a positioning flange which correspond to each other are arranged at the bottom of the upper pressing block and the top of the lower support; when the upper pressing block and the lower support are closed, the top of the positioning flange is located in the clamping groove opening of the positioning groove. The stability of the pump head and the liquid transmission precision can be improved, and the vibration of the pump head during operation is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of peristaltic pumps, and particularly relates to a peristaltic pump. Background Art

[0002] A peristaltic pump is a special positive-displacement pump, mainly used for fluid distribution or transportation, and is widely used in industries such as pharmaceuticals, food, and chemicals. When the pump head of the peristaltic pump works, the roller rotates, and a "pillow"-shaped fluid is formed in a section of the pump tube between the two rollers. The fluid is pumped by alternately squeezing and releasing the elastic delivery hose of the pump; the volume of the "pillow" affects the flow rate, and the rotational speed of the roller also affects the flow rate.

[0003] There is a very common type of existing peristaltic pump head, that is, a peristaltic pump head that realizes rapid hose replacement by lifting and lowering the upper pressure block through a specific structure. This type of peristaltic pump head is widely used due to the advantage of rapid hose replacement. This type of peristaltic pump head is generally guided and positioned through a slideway structure provided between the body and the upper pressure block to ensure the operation accuracy of the peristaltic pump head. Although this type of peristaltic pump head is widely used, there are still some problems.

[0004] Three problems existing in the above-mentioned type of peristaltic pump head: (1) The setting of the slideway reduces the stability of the pump head; (2) The setting of the slideway reduces the liquid transmission accuracy; (3) Slight vibration will occur when the pump head operates. Summary of the Utility Model

[0005] In view of this, the utility model provides a peristaltic pump, which can improve the stability of the pump head and the liquid transmission accuracy, and reduce the vibration when the pump head operates.

[0006] The utility model adopts the following technical solutions to achieve the above technical effects:

[0007] A peristaltic pump includes a pump head body, an upper pressure block, and a lower support; the upper pressure block and the lower support are located on the same side of the pump head body; corresponding positioning grooves and positioning flanges are provided at the bottom of the upper pressure block and the top of the lower support;

[0008] When the upper pressure block and the lower support are in a closed state, the top of the positioning flange is located in the card slot of the positioning groove.

[0009] Further, the positioning groove is formed by a bent plate that bends inward; the bent plate has two bending angles, and one end and the other end form a card slot.

[0010] Further, the end face of the bent plate and the top face of the positioning flange are both smooth arc surfaces.

[0011] Further, a slideway is provided on the pump head body, and the upper pressure block is constrained in the slideway and can move freely along the slideway.

[0012] Further, both the positioning groove and the positioning flange are located on the side close to the pump head body.

[0013] Further, there are two positioning grooves and two positioning flanges, which are respectively located on both sides of the corresponding upper pressing block and lower support.

[0014] Further, a stepped surface is provided on one side of the positioning flange, and one end of the bending plate extends corresponding to the stepped surface; when the upper pressing block and the lower support are in a closed state, one end of the bending plate abuts against the upper surface of the stepped surface.

[0015] Further, the top of the positioning flange is in clearance fit with the card slot opening of the positioning groove.

[0016] Compared with the prior art, the technical solution of the present utility model has the following beneficial effects:

[0017] The present utility model has the following three advantages compared with the above-mentioned conventional peristaltic pump head:

[0018] (1) It has higher operating stability;

[0019] (2) It has higher liquid transmission accuracy;

[0020] (3) The upper pressing block and the lower support are combined into a whole by meshing, thereby reducing the vibration generated during the operation of the peristaltic pump head. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model;

[0022] Figure 2 It is a partial structural schematic diagram of an embodiment of the present utility model.

[0023] In the figure: 1, upper pressing block; 2, positioning groove; 3, positioning flange; 4, lower support; 5, pump head body; 6, bending plate; 7, stepped surface. Detailed Embodiments

[0024] Next, the present utility model will be further described in conjunction with the drawings.

[0025] Refer to Figures 1 to 2 , a peristaltic pump includes a pump head body, an upper pressing block and a lower support; the upper pressing block and the lower support are located on the same side of the pump head body; corresponding positioning grooves and positioning flanges are provided at the bottom of the upper pressing block and the top of the lower support;

[0026] In the closed state of the upper pressing block and the lower support, the top of the positioning flange is located in the clamping groove opening of the positioning groove. The positioning groove is formed by a bent plate that bends inward; the bent plate has two bending angles, and one end thereof forms a clamping groove opening with the other end. The end face of the bent plate and the top face of the positioning flange are both smooth arc surfaces. A slideway is provided on the pump head body, and the upper pressing block is constrained in the slideway and can move freely along the slideway. The positioning groove and the positioning flange are both located on the side close to the pump head body. There are two positioning grooves and two positioning flanges, which are respectively located on both sides of the corresponding upper pressing block and lower support.

[0027] One side of the positioning flange is provided with a stepped surface, and one end of the bent plate extends to correspond to the stepped surface; in the closed state of the upper pressing block and the lower support, one end of the bent plate abuts against the upper surface of the stepped surface. The top of the positioning flange is in clearance fit with the clamping groove opening of the positioning groove.

[0028] Principle of use: During use, when the upper pressing block slides to the bottom along the slideway, due to the arc surface on the positioning flange and the arc surface at the inner end of the bent plate, it has a certain self-positioning ability, which will cause the positioning flange to slide into the clamping groove, and finally the bent plate clamps the positioning flange; when reaching the final position, the stepped surface plays the role of final slideway limit.

[0029] It should be understood that the above description of the specific implementation manner of this patent is only an exemplary description listed for the convenience of those of ordinary skill in the art to understand the patent solution, and does not imply that the protection scope of this patent is only limited to these examples. Those of ordinary skill in the art can fully understand the patent technical solution and, without any creative labor, obtain more specific implementation manners by combining technical features, replacing some technical features, adding more technical features, etc. to the examples listed in this patent. All these specific implementation manners are within the scope covered by the claims of this patent. Therefore, these new specific implementation manners should also be within the protection scope of this patent.

[0030] In addition, for the purpose of simplifying the description, this patent may not list some ordinary specific implementation schemes, which can be naturally thought of by those of ordinary skill in the art after understanding the patent technical solution. Obviously, these schemes should also be included in the protection scope of this patent.

Claims

1. A peristaltic pump, comprising a pump head body, an upper pressure block and a lower support; characterized in that: The upper pressing block and the lower support are located on the same side of the pump head body; the bottom of the upper pressing block and the top of the lower support are provided with corresponding positioning grooves and positioning flanges; When the upper pressing block and the lower support are in a closed state, the top of the positioning flange is located in the clamping notch of the positioning groove.

2. A peristaltic pump according to claim 1, characterized in that: The positioning groove is formed by a bent plate bent inwardly; the bent plate has two bending angles, one end of which and the other end of which form a slot opening.

3. A peristaltic pump according to claim 2, characterized in that: The end surface of the bent plate and the top surface of the positioning flange are both smooth arc surfaces.

4. A peristaltic pump according to claim 2, characterized in that: The pump head body is provided with a slideway, and the upper pressing block is constrained in the slideway and can move freely along the slideway.

5. A peristaltic pump according to claim 1, characterized in that: The positioning groove and the positioning flange are both located near the pump head body.

6. A peristaltic pump according to claim 1, characterized in that: There are two positioning grooves and two positioning flanges, which are respectively located on both sides of the corresponding upper pressing block and lower support.

7. A peristaltic pump according to claim 2, characterized in that: A step surface is provided on one side of the positioning flange, and one end of the bent plate extends to correspond to the step surface; when the upper pressing block and the lower support are in a closed state, one end of the bent plate abuts against the upper surface of the step surface.

8. A peristaltic pump according to claim 1, characterized in that: The top of the positioning flange is clearance-matched with the notch opening of the positioning groove.

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