A device for eliminating pulsation of a peristaltic pump or a diaphragm pump

Abstract

The invention discloses a device for eliminating pulsation of a peristaltic pump or a diaphragm pump, which solves the influence of pulsation on a pump body; the technical scheme adopted is: a device for eliminating pulsation of a peristaltic pump or a diaphragm pump, comprising a guide sleeve, a spring, a shell, an end cover and a reflux hose, the axial cross section of the guide sleeve is T-shaped, and a through hole is arranged axially of the guide sleeve, the spring is sleeved on the guide sleeve, two components formed by the guide sleeve and the spring are coaxially and symmetrically arranged, the large ends of the two guide sleeves are arranged oppositely, the shell is a cylindrical structure with openings at both ends, the shell matches to cover the two components formed by the guide sleeve and the spring, the two end covers are matched to be arranged at the two ends of the shell, an inlet / outlet pipe is arranged in the middle of the outer side of the end cover, the inlet / outlet pipe is correspondingly connected with the guide sleeve, a reflux port is arranged on the outer side of the end cover below the inlet / outlet pipe, and the ends of the two reflux ports are connected through a reflux hose located outside the shell.

Description

Technical Field

[0001] The invention discloses a device for eliminating pulsation of a peristaltic pump or a diaphragm pump, belonging to the technical field of peristaltic pumps or diaphragm pumps. Background Art

[0002] Peristaltic pumps or diaphragm pumps are restricted by their working principles, and pulsation will always exist, which may affect the fine control of the pump body at the least, or cause damage to the pump body at the worst. Summary of the invention

[0003] The present invention overcomes the shortcomings of the prior art, provides a device for eliminating pulsation of a peristaltic pump or a diaphragm pump, and solves the influence of pulsation on the pump body.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a device for eliminating pulsation of a peristaltic pump or a diaphragm pump, comprising a guide sleeve, a spring, a shell, an end cover and a reflux hose, the axial cross-section of the guide sleeve is T-shaped, and the axial direction of the guide sleeve is provided with a through hole, the spring is sleeved on the guide sleeve, two components formed by the guide sleeve and the spring are coaxially and symmetrically arranged, the large ends of the two guide sleeves are arranged opposite to each other, the shell is a cylindrical structure with openings at both ends, the shell matches to cover the two components formed by the guide sleeve and the spring, the two end covers are matched to be arranged at the two ends of the shell, an inlet / outlet pipe is provided in the middle of the outer side of the end cover, the inlet / outlet pipe is correspondingly connected with the guide sleeve, a reflux port is provided on the outer side of the end cover below the inlet / outlet pipe, and the ends of the two reflux ports are connected through a reflux hose located outside the shell.

[0005] The guide sleeve comprises a plug-in tube and a circular baffle, wherein the circular baffle is arranged at one end of the plug-in tube, and the other end of the plug-in tube is inserted into the liquid inlet / outlet tube and has an interference fit with the liquid inlet / outlet tube.

[0006] The end cover and the shell are connected via threads.

[0007] A gap is left between the outer edge of the circular baffle and the inner wall of the shell, so that the liquid between the two circular baffles can enter the chamber where the spring is located and merge into the return hose.

[0008] Compared with the prior art, the present invention has the following beneficial effects: the present invention buffers the influence of pulsation disturbance through the spring and the return hose, so that no matter whether the input liquid pressure increases or decreases, it can be buffered accordingly to ensure that the discharged liquid runs smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention will be further described below in conjunction with the accompanying drawings.

[0010] Figure 1 It is a structural schematic diagram of the present invention.

[0011] Figure 2 It is a schematic diagram of the explosion of the present invention.

[0012] Figure 3 It is a stereogram of the present invention.

[0013] In the figure: 1 is a guide sleeve, 2 is a spring, 3 is a housing, 4 is an end cover, 5 is a reflux hose, 6 is an inlet / outlet pipe, and 7 is a reflux port. DETAILED DESCRIPTION

[0014] like Figure 1 , Figure 2 and Figure 3 As shown, the present invention is a device for eliminating pulsation of a peristaltic pump or a diaphragm pump, comprising a guide sleeve 1, a spring 2, a shell 3, an end cover 4 and a reflux hose 5, wherein the axial cross-section of the guide sleeve 1 is T-shaped, and a through hole is arranged axially of the guide sleeve 1, the spring 2 is sleeved on the guide sleeve 1, and two components formed by the guide sleeve 1 and the spring 2 are coaxially and symmetrically arranged, and the large ends of the two guide sleeves 1 are arranged opposite to each other, the shell 3 is a cylindrical structure with openings at both ends, the shell 3 matches to cover the two components formed by the guide sleeve 1 and the spring 2, and the two end covers 4 are matched to be arranged at both ends of the shell 3, and an inlet / outlet pipe 6 is arranged in the middle of the outer side of the end cover 4, and the inlet / outlet pipe 6 is correspondingly connected to the guide sleeve 1, and a reflux port 7 is arranged on the outer side of the end cover 4 below the inlet / outlet pipe 6, and the ends of the two reflux ports 7 are connected through a reflux hose 5 located outside the shell 3.

[0015] The guide sleeve 1 includes a plug-in tube and a circular baffle. The circular baffle is arranged at one end of the plug-in tube. The other end of the plug-in tube is inserted into the inlet / outlet pipe 6 and has an interference fit with the inlet / outlet pipe 6.

[0016] The end cap 4 is connected to the outer shell 3 by threads, and the end cap 4 is integrally formed with the inlet / outlet pipe 6 and the reflux port 7. The end cap 4 at one end is movably connected to the outer shell 3, and the end cap 4 at the other end is integrally formed with the outer shell 3.

[0017] A gap is left between the outer edge of the circular baffle and the inner wall of the housing 3 , so that the liquid between the two circular baffles can enter the chamber where the spring 2 is located and merge into the reflux hose 5 .

[0018] The working process of the present invention is as follows: after the liquid passes through the inlet / outlet pipe 6 on one side and enters the plug-in pipe and circular baffle of the guide sleeve 1 on one side, it enters the cavity matched by the two circular baffles and the shell 3, and then most of the liquid passes through the plug-in pipe and circular baffle of the guide sleeve 1 on the other side and is discharged from the inlet / outlet pipe 6 on the other side, and a small part of the liquid passes through the gap between the circular baffle and the inner wall of the shell 3 to the rear side of the circular baffle and enters the reflux hose 5 through the reflux port 7. When the liquid flow is stable, the pressure on the front and rear sides of the circular baffle is balanced. When the liquid undergoes pulsating turbulence, the pressure of the liquid entering between the two circular baffles changes, and a pressure difference appears on the front and rear sides of the circular baffle. The pressure difference forces the circular baffle to move, and this part of the energy is absorbed by the spring 2, thereby greatly reducing the energy of the pulsating turbulence, making the discharged liquid relatively smooth.

[0019] Specifically, when the pressure of the liquid entering between the two circular baffles increases, the pressure on the outside of the circular baffles is greater than the pressure on the inside. This pressure forces the circular baffles to move toward both sides, compressing the spring and squeezing the liquid in the return hose 5. The return hose 5 expands and absorbs the energy of the pulsating turbulence, ensuring that the liquid flowing out runs smoothly.

[0020] When the pressure of the liquid entering between the two circular baffles decreases, the pressure on the outside of the circular baffle is less than the pressure on the inside. The compressed spring forces the circular baffle to move toward the middle, and the liquid in the expanded return hose 5 is released, replenishing the energy reduced by the pulsation turbulence and ensuring that the liquid flowing out runs smoothly.

[0021] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A device for eliminating pulsation of a peristaltic pump or a diaphragm pump, characterized in that: The invention comprises a guide sleeve (1), a spring (2), a shell (3), an end cover (4) and a return hose (5); the guide sleeve (1) has a T-shaped axial cross-section and is provided with a through hole in the axial direction; the spring (2) is sleeved on the guide sleeve (1); two components formed by the guide sleeve (1) and the spring (2) are coaxially and symmetrically arranged; the large ends of the two guide sleeves (1) are arranged opposite to each other; the shell (3) is a cylindrical structure with openings at both ends .... The two components formed by the guide sleeves (1) and the springs (2) are matched to cover the two end covers (4) at the two ends of the housing (3). An inlet / outlet pipe (6) is provided in the middle of the outer side of the end cover (4). The inlet / outlet pipe (6) is connected to the guide sleeves (1) respectively. A reflux port (7) is provided on the outer side of the end cover (4) below the inlet / outlet pipe (6). The ends of the two reflux ports (7) are connected through a reflux hose (5) located outside the housing (3).

2. A device for eliminating pulsation of a peristaltic pump or a diaphragm pump according to claim 1, characterized in that: The guide sleeve (1) comprises a plug-in tube and a circular baffle, wherein the circular baffle is arranged at one end of the plug-in tube, and the other end of the plug-in tube is inserted into the liquid inlet / outlet tube (6) and is interference fit with the liquid inlet / outlet tube (6).

3. A device for eliminating pulsation of a peristaltic pump or a diaphragm pump according to claim 1, characterized in that: The end cover (4) and the outer shell (3) are connected via threads.

4. A device for eliminating pulsation of a peristaltic pump or a diaphragm pump according to claim 2, characterized in that: A gap is left between the outer edge of the circular baffle and the inner wall of the housing (3), so that the liquid between the two circular baffles can enter the chamber where the spring (2) is located and merge into the return hose (5).

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