Fluid defoaming device

Abstract

The utility model relates to a fluid defoaming device in the technical field of fluid material treatment equipment. The fluid defoaming device comprises a plunger, a sealing ring, a semi-permeable membrane and a plunger cover, the plunger cover is provided with a vacuum interface; a defoaming groove is formed in the upper surface of the plunger; the semi-permeable membrane covers the defoaming groove to form a defoaming area; the plunger cover is provided with a negative pressure cavity above the semi-permeable membrane; the plunger is screwed into the plunger cover and is sealed through a sealing ring; the plunger is provided with a first fluid connecting pipe and a second fluid connecting pipe which are communicated; the first fluid connecting pipe and the second fluid connecting pipe are communicated with the defoaming area. When the fluid defoaming device is used, a gas-liquid mixture enters the fluid defoaming device through the first fluid connecting pipe, bubbles are discharged from the hole of the semi-permeable membrane along with partial fluid and enter the plunger cover, and the residual pure fluid is discharged from the second fluid connecting pipe, so that the effect of eliminating the bubbles is achieved. The online defoaming device is simple in structure, small in size, capable of adapting to smaller working flow and high in online defoaming efficiency, meanwhile, the purity of experimental raw materials can be kept, and pure fluid can be stably supplied.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid material processing equipment, in particular to a fluid defoaming device. Background Art

[0002] Micro bubbles are a major source of interference in analysis and operation. Bubbles suspended in the fluid refract light, affecting the stability and accuracy of the test. In the medical field, a large amount of foam will be generated during the extraction and compression of biological fluids due to the presence of proteins and mucus. If the foam cannot be defoamed in time, a large amount of air will be mixed in, affecting production, and "boiling" will occur, causing problems such as waste of biological fluids and cell death. Existing defoaming technologies all require a large flow rate to start working and cannot work online, which greatly affects the processing of raw materials in microfluid experiments and microflow spectral analysis. Utility Model Content

[0003] In order to solve the above technical problems, the utility model discloses a fluid defoaming device, and the technical solution of the utility model is implemented as follows:

[0004] A fluid debubbling device comprises a plunger, a sealing ring, a semi-permeable membrane and a plunger cover;

[0005] The plunger cover is provided with a vacuum interface;

[0006] The upper surface of the plunger is provided with a defoaming groove;

[0007] The semipermeable membrane sheet is covered on the defoaming tank to form a defoaming zone;

[0008] The plunger cover is provided with a negative pressure cavity above the semipermeable membrane;

[0009] The plunger is screwed into the plunger cover and sealed by the sealing ring;

[0010] The plunger is provided with a first fluid connecting pipe and a second fluid connecting pipe which are connected thereto;

[0011] The first fluid connecting pipe and the second fluid connecting pipe are connected to the debubble zone.

[0012] Preferably, a filter element is arranged inside the vacuum interface.

[0013] Preferably, the inner wall of the plunger cover is provided with a right-handed thread, and the outer surface of the plunger is provided with a left-handed thread; the plunger cover is connected to the plunger through threads.

[0014] Preferably, a force rod is also provided on the outer surface of the plunger.

[0015] Preferably, the sealing ring is an O-shaped structure.

[0016] Preferably, the sealing ring material is silicone.

[0017] Preferably, the semipermeable membrane is made of PTFE material.

[0018] Preferably, the diameter of the first fluid connecting pipe is 1.5 mm-2 mm, and the diameter of the second fluid connecting pipe is 3.5 mm-4.9 mm.

[0019] Existing fluid debubbling devices require a large flow rate to start working. The online debubbling efficiency is low and cannot meet the debubbling needs. In this way, bubbles cannot be eliminated in time, affecting production efficiency. The technical solution of the utility model is to set a semi-permeable membrane combined with negative pressure adsorption. When the fluid containing bubbles flows through the debubbling area, the bubbles and part of the fluid pass through the semi-permeable membrane under the action of negative pressure and enter the plunger cover, thereby achieving real-time bubble elimination. The utility model is suitable for smaller working flows and has higher online efficiency. At the same time, it can maintain the purity and stable supply of experimental raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of an embodiment of a fluid defoaming device;

[0022] Figure 2 It is a structural cross-sectional view of an embodiment of a fluid debubbling device;

[0023] Figure 3 It is a structural schematic diagram of a plunger embodiment;

[0024] Figure 4 is a top view of a plunger embodiment;

[0025] Figure 5 It is a structural schematic diagram of an embodiment of a plunger cover;

[0026] Figure 6 It is a schematic diagram of the structure of a semipermeable membrane embodiment in a working state.

[0027] In the above drawings, the figure numbers represent:

[0028] 1. Plunger;

[0029] 1-1, defoaming tank;

[0030] 1-2, first fluid connection pipe;

[0031] 1-3, second fluid connection;

[0032] 1-4, booster rod;

[0033] 2. Plunger cover;

[0034] 2-1, vacuum interface;

[0035] 2-2, vacuum chamber;

[0036] 2-3, filter element;

[0037] 3. Sealing ring;

[0038] 4. Semipermeable membrane. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] Example

[0041] In a specific embodiment, Figure 1 and Figure 2 As shown, a fluid debubbling device comprises a plunger 1, a plunger cover 2, a sealing ring 3 and a semi-permeable membrane 4.

[0042] like Figure 5 As shown, the plunger cover 2 is provided with a vacuum interface 2-1; the function of the vacuum interface 2-1 is to connect an external vacuum pump.

[0043] like Figure 3 and Figure 4 As shown, the upper surface of the plunger 1 is provided with a debubble groove 1-1; the outer surface of the plunger 1 is also provided with a force rod 1-4, and the plunger 1 is provided with a first fluid connection pipe 1-2 and a second fluid connection pipe 1-3. The semipermeable membrane 4 covers the debubble groove 1-1 to form a debubble zone; the plunger cover 2 is provided with a negative pressure cavity 2-2 above the semipermeable membrane 4.

[0044] The plunger 1 is screwed into the plunger cover 2 and sealed by the sealing ring 3.

[0045] The first fluid connecting pipe 1-2 and the second fluid connecting pipe 1-3 are connected to the debubble zone.

[0046] A filter element 2-3 is provided inside the vacuum interface 2-1. The function of the filter element 2-3 is to prevent the escaped fluid from entering the external vacuum pump.

[0047] In this embodiment, the inner wall of the plunger cover 2 is provided with a right-handed thread, and the outer surface of the plunger 1 is provided with a left-handed thread; the plunger cover 2 is connected to the plunger 1 through threads.

[0048] In this embodiment, the function of the sealing ring 3 is to prevent the fluid from flowing out along the connection between the plunger cover 2 and the plunger 1 after passing through the debubbling area, generating bubbles that affect the debubbling effect. In this embodiment, the sealing ring 3 is an O-shaped structure, and the material is silicone. It has a simple structure, is easy to install, and has good self-lubricating properties. It can be used as an oil-free lubricating seal to prevent fluid leakage. And silicone can be used in an environment below 150° without performance changes, has high practicality, and does not need to be replaced repeatedly.

[0049] In this embodiment, the first fluid connecting pipe 1-2 is a liquid inlet pipe, and the second fluid connecting pipe 1-3 is a liquid outlet pipe. The diameter of the first fluid connecting pipe 1-2 is 1.5mm-2mm, and the diameter of the second fluid connecting pipe 1-3 is 3.5mm-4.9mm. The cross-section of the debubbling groove 1-1 is larger than the cross-section of the first fluid connecting pipe 1-2, and smaller than the cross-section of the second fluid connecting pipe 1-3. The fluid flow rate entering the first fluid connecting pipe 1-2 is fixed. When the high-speed fluid enters the debubbling area from the first fluid connecting pipe 1-2, the flow rate will decrease, and then after entering the second fluid connecting pipe 1-3, the flow rate will further decrease, so that the fluid to be debubbled can stay in the debubbling area for as long as possible, thereby improving the debubbling effect.

[0050] When in use, this embodiment is connected to a vacuum pump, which evacuates the negative pressure cavity 2-2. At this time, the pressure in the plunger cover 2 is maintained at -40Kpa-50Kpa, and the pressure is adjusted by the vacuum pump. Under the action of pressure, the semipermeable membrane 4 expands into the negative pressure cavity 2-2 to form a smooth transition angle, such as Figure 6 As shown. At the same time, because the width of the liquid path increases and the flow rate decreases, the bubbles have time to float to the top of the negative pressure cavity 2-2. Since the density of the gas-liquid mixture is relatively small, after flowing through the first fluid pipeline and entering the debubble zone, it will be suspended on the surface of the fluid and contact the semipermeable membrane 4. The bubbles will pass through the semipermeable membrane 4 and be discharged from the holes of the semipermeable membrane 4 along with part of the fluid and enter the plunger cover 2. The remaining pure bubble-free fluid, due to its high density, will keep flowing at the bottom when flowing into the debubble zone and be discharged through the second fluid pipeline, thereby achieving the effect of eliminating bubbles.

[0051] In a preferred embodiment, the semipermeable membrane 4 is made of PTFE material, which has a long service life and can be reused, thereby reducing operating costs. According to experiments, when the thickness of the semipermeable membrane 4 is about 0.4 mm and the average pore size is about 1 μm, the escaped fluid is minimal and the filtering effect on bubbles is optimal.

[0052] The utility model has a small volume, is adaptable to a smaller working flow, has a high online defoaming efficiency, can maintain the purity of experimental raw materials, and stably supplies pure fluid.

Claims

1. A fluid defoaming device, characterized in that: It includes a plunger, a sealing ring, a semipermeable membrane and a plunger cover; The plunger cover is provided with a vacuum interface; The upper surface of the plunger is provided with a defoaming groove; The semipermeable membrane sheet is covered on the defoaming tank to form a defoaming zone; The plunger cover is provided with a negative pressure cavity above the semipermeable membrane; The plunger is screwed into the plunger cover and sealed by the sealing ring; The plunger is provided with a first fluid connecting pipe and a second fluid connecting pipe which are connected thereto; The first fluid connecting pipe and the second fluid connecting pipe are connected to the debubble zone.

2. The fluid defoaming device according to claim 1, characterized in that: A filter element is arranged inside the vacuum interface.

3. The fluid debubbling device according to claim 1, characterized in that: The inner wall of the plunger cover is provided with a right-hand thread, and the outer surface of the plunger is provided with a left-hand thread; the plunger cover is connected to the plunger through threads.

4. The fluid debubbling device according to claim 1, characterized in that: The outer surface of the plunger is also provided with a force adding rod.

5. A fluid debubbling device according to claim 1, characterized in that: The sealing ring is an O-shaped structure.

6. A fluid debubbling device according to claim 1, characterized in that: The sealing ring material is silicone.

7. A fluid debubbling device according to claim 1, characterized in that: The semipermeable membrane is made of PTFE material.

8. A fluid debubbling device according to claim 7, characterized in that: The thickness of the semipermeable membrane is 0.35 mm-0.48 mm, and the average pore size is 0.955 μm-1.031 μm.

9. A fluid debubbling device according to claim 5, characterized in that: The diameter of the first fluid connecting pipe is 1.5 mm-2 mm, and the diameter of the second fluid connecting pipe is 3.5 mm-4.9 mm.

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