Residue-free precise metering isolation pump

Abstract

The utility model provides a residue-free accurate metering isolation pump. Comprising a cylindrical tube, a plunger pump, a high-pressure air pump, an electromagnetic three-way valve, a polytetrafluoroethylene transparent tube, a single-chip microcomputer control system, an optocoupler box, an infrared transmitting tube and an infrared receiving tube. Aiming at the problems of time-consuming and labor-consuming residue cleaning, low working efficiency and incomplete residue cleaning in a pump body in a traditional metering operation mode, a special structure is designed, a solenoid structure formed by winding a polytetrafluoroethylene transparent thin tube on a vertical cylindrical tube from top to bottom is adopted, metering is carried out in the spiral tube, and the metering efficiency is greatly improved. Metered liquid does not enter the pump body, the problem that liquid storage dead angles exist in the pump body is solved, the air pump is adopted for purging the transparent polytetrafluoroethylene spiral pipe, time and labor consumed for cleaning residues can be effectively reduced, and the residues are completely and rapidly metered, rapidly purged and thoroughly cleaned. And the device is low in cost, has various advantages, is particularly suitable for popularization and application in the field, and has a very wide market prospect.

Description

TECHNICAL FIELD

[0001] The utility model relates to metering pump technical field, concretely relates to a kind of no residual precision metering isolation pump. BACKGROUND

[0002] At present, the metering pump used in domestic and foreign chemical industry, scientific research, petroleum detection etc., reciprocating plunger pump, diaphragm pump, peristaltic pump, electromagnetic isolation pump etc., are all quantitatively inhaled into pump body after being metered fluid and then discharged, but all have residual in pump body and inlet and outlet fluid pipe, affect next time metering precision, similar water solution residual can be inhaled into pure water, distilled water to clean, exist water residual, similar petroleum residual cleans up then leave cleaning agent residual, cause cross contamination when extracting liquid next time, thus need to develop a kind of metering pump that can meter certain amount of liquid without passing through pump body. SUMMARY

[0003] The utility model discloses to solve the above-mentioned insufficient and need of prior art, propose a kind of no residual precision metering isolation pump with simple structure, clever design, reasonable layout, can both fast measure liquid and can quickly blow residual.

[0004] Therefore, a method or device capable of solving the above problems is needed, a kind of no residual precision metering isolation pump, including cylindrical pipe, plunger pump, high-pressure gas pump, electromagnetic three-way valve, polytetrafluoroethylene transparent pipe, single-chip microcomputer control system, photocoupler box, infrared emitting tube and infrared receiving tube.

[0005] Among them, the high-pressure gas pump of a kind of no residual precision metering isolation pump is connected with plunger pump respectively upper end electromagnetic three-way valve normally open end and normally closed end, upper end electromagnetic three-way valve public end connects one end of polytetrafluoroethylene transparent pipe, polytetrafluoroethylene transparent pipe passes through photocoupler box and is tightly wound in the upper end of one cylindrical pipe to the lower end of cylindrical pipe and constitutes spiral pipe, the other end of this polytetrafluoroethylene transparent pipe connects lower end electromagnetic three-way valve public end, lower end electromagnetic valve normally open end connects the sample bottle needing quantification, normally closed end connects the sample bottle after quantification and transfer. Plunger pump, high-pressure gas pump, upper end electromagnetic three-way valve, lower end electromagnetic three-way valve are connected to single-chip microcomputer control system, and the whole device constitutes a kind of no residual precision metering isolation pump, the high-pressure gas pump is connected with upper end three-way valve normally closed end, the gas flow of high-pressure pump is introduced into polytetrafluoroethylene transparent pipe by the conduction of upper end three-way valve normally closed end and public end under the control of single-chip microcomputer, residual liquid in polytetrafluoroethylene transparent pipe is carried away using gas flow, lower end three-way valve normally closed end is inserted into the sample bottle after quantification and transfer, can be quickly blown clean from the residual in the upper end of polytetrafluoroethylene spiral pipe to lower end.

[0006] Further, the infrared emitting tube and the infrared receiving tube are fixed through the optical coupling box, the polytetrafluoroethylene transparent tube in the optical coupling box is clamped left and right, and the light emitted by the infrared emitting tube can be received by the infrared receiving tube through the polytetrafluoroethylene transparent tube in the optical coupling box.

[0007] Compared with the prior art, the utility model has the beneficial effects that:

[0008] The utility model discloses a residual precise metering isolation pump, simple structure, clever design, reasonable layout, it is to the traditional metering operation mode existence's cleaning residual time -consuming and labor -intensive, low working efficiency, pump body inside cleaning not net residual problem, designs a kind of special structure, adopts polytetrafluoroethylene transparent thin pipe and is wound into solenoid structure from top to bottom on vertical cylinder pipe, and the liquid to be metered does not enter pump body, and polytetrafluoroethylene solenoid pipe is similar spiral slide, residual droplet can smoothly slide along the inclined slide, overcome the problem of liquid dead angle in pump body, and air pump is used to purge transparent polytetrafluoroethylene solenoid pipe, which can effectively reduce the time -consuming and labor -intensive of cleaning residual, can completely fast metering, fast purging and completely removing residual, which is very meaningful. It not only has low cost, but also has multiple advantages, especially suitable for popularization and application in the field, and has very broad market prospect. BRIEF DESCRIPTION OF DRAWINGS

[0009] The accompanying drawings, which are included to provide a further understanding of the utility model, form a part of the application and do not constitute improper limitations to the utility model, and in the drawings:

[0010] Figure 1 It is an embodiment structure schematic view of the utility model.

[0011] Figure 2 It is an infrared emitting tube, infrared receiving tube, polytetrafluoroethylene transparent tube position structure schematic view in optical coupling box.

[0012] Wherein, 1. cylinder pipe, 2. polytetrafluoroethylene transparent tube, 3. optical coupling box, 4. upper end electromagnetic tee metering valve, 5. lower end electromagnetic tee metering valve, 6. plunger pump, 7. high pressure air pump, 8. infrared emitting tube, 9. infrared receiving tube, 10. single-chip microcomputer control system, 11. sample bottle needing rationing, 12. sample bottle after rationing is transferred out. DETAILED DESCRIPTION

[0013] The utility model will be combined with the drawings and specific embodiments to be described in detail, obviously, the described embodiment is only a part of the utility model, but not all embodiments, all other embodiments obtained by the person skilled in the art without making creative labor based on the embodiment in the utility model, all belong to the scope of the utility model protection, the utility model is not limited by the specific embodiments disclosed below.

[0014] Please see Figure 1 In the utility model, a residual-free precise metering isolation pump is provided, which comprises 1. a cylindrical pipe, 2. a polytetrafluoroethylene transparent pipe, 3. an optical coupling box, 4. an upper end electromagnetic three-way metering valve, 5. a lower end electromagnetic three-way metering valve, 6. a plunger pump, 7. a high-pressure air pump, 8. an infrared emitter tube, 9. an infrared receiver tube, 10. a single-chip microcomputer control system, 11. a sample bottle requiring metering, and 12. a sample bottle transferred out after metering.

[0015] The high-pressure air pump 7 and the plunger pump 6 of the residual-free precise metering isolation pump are respectively connected to the normally open end and the normally closed end of the upper end electromagnetic three-way valve 4, the common end of the upper end electromagnetic three-way valve 4 is connected to one end of the polytetrafluoroethylene transparent pipe 2, the polytetrafluoroethylene transparent pipe 2 passes through the optical coupling box 3 and is tightly wound around a plurality of turns at the upper end outside the cylindrical pipe 1 to the lower end of the cylindrical pipe 1 to form a spiral pipe, the other end of the polytetrafluoroethylene transparent pipe 2 at the lower end is connected to the common end of the lower end electromagnetic three-way valve 5, the normally open end of the lower end electromagnetic valve 5 is connected to the sample bottle 11 requiring metering, and the normally closed end is connected to the sample bottle 12 transferred out after metering. The plunger pump 6, the high-pressure air pump 7, the upper end electromagnetic three-way valve 4, the lower end electromagnetic three-way valve 5, the infrared emitter tube 8 and the infrared receiver tube 9 are respectively connected to the single-chip microcomputer control system to form a residual-free precise metering isolation pump, and the high-pressure air pump 7 is communicated with the polytetrafluoroethylene transparent spiral pipe 2 and can quickly blow clean the residues in the polytetrafluoroethylene transparent spiral pipe 2 from the upper end to the lower end.

[0016] Specifically, in the embodiment scheme of the utility model, the polytetrafluoroethylene transparent pipe 2 adjusts the volume of the liquid to be metered by selecting different pipe cross-sectional areas, pipe lengths and relative positions of the optical coupling box 3.

[0017] Specifically, please see Figure 2The utility model discloses an embodiment scheme, infrared emission tube 8 with infrared receiving tube 9 through photocoupler box 3 fixed, and the left and right clamping of polytetrafluoroethylene transparent pipe 2 in photocoupler box 3 is surrounded, and the infrared light of specific wavelength that infrared emission tube 8 sends can pass through polytetrafluoroethylene transparent pipe 2 in photocoupler box 3 and be received by infrared receiving tube 9, when the liquid in polytetrafluoroethylene transparent pipe 2 reaches the specified volume, infrared ray will pass through the liquid in polytetrafluoroethylene transparent pipe 2, affect the propagation of infrared ray, the infrared receiving tube 9 on the other side of polytetrafluoroethylene transparent pipe 2 receives and detects the infrared ray affected by liquid, causes voltage variation, voltage variation transmission to singlechip control system 10, and singlechip control system immediately 10 stops plunger pump 6 work, simultaneously starts high pressure air pump 7, and the airflow of high pressure air pump 6 enters polytetrafluoroethylene transparent pipe 2 through upper end electromagnetic three-way valve 4, utilizes the airflow and takes away the residual liquid in polytetrafluoroethylene transparent pipe 2, and the lower end electromagnetic three-way valve 5 constant closing end inserts the sample bottle 12 that shifts out after quantification, can from the upper end to the residual in polytetrafluoroethylene transparent spiral pipe 2 fast blow down clean to the lower end, realize the quick measurement liquid of can, and the fast blow down residual of can, a kind of no residual precision measurement isolation pump.

[0018] Further describe the specific embodiment of the utility model, the working process of a kind of no residual precision measurement isolation pump of the utility model embodiment is as follows:

[0019] One end of polytetrafluoroethylene transparent coil pipe 2 is connected with plunger pump 6, of course, the utility model patent can also adopt other types of pump, as long as it can produce negative pressure in polytetrafluoroethylene transparent pipe 2, the electronic metering module used in the utility model includes infrared emission tube 8 and infrared receiving tube 9 for precise measurement of liquid entering polytetrafluoroethylene transparent coil pipe 2. Single-chip microcomputer control system drives upper end electromagnetic three-way metering valve 4 or lower end electromagnetic three-way metering valve 5, drives high pressure air pump 7 and plunger pump 6.

[0020] Specifically, the lower end electromagnetic three-way valve 5 is connected to the lower end of the polytetrafluoroethylene spiral pipe 2, the normally open end is connected to the sample bottle 11 that needs to be quantified, and the normally closed end is connected to the sample bottle 12 that is shifted out after quantification. When the plunger pump 6 is working, the upper end electromagnetic three-way valve 4 is opened, the plunger pump 6 generates negative pressure in the polytetrafluoroethylene spiral pipe 2, and the lower end electromagnetic three-way valve 5 is opened. The lower end electromagnetic valve 5 is connected to the sample bottle 11 that needs to be quantified through the normally open end, and when the required amount is reached, the single-chip microcomputer control system stops the pump valve, and then the lower end electromagnetic three-way valve 5 is controlled to switch to the normally closed end connected to the sample bottle 12 that is shifted out after quantification. The high pressure air pump 7 pressurizes the polytetrafluoroethylene spiral pipe 2 to expel all the measured liquid in the polytetrafluoroethylene spiral pipe 2, and there will be liquid residue in the lower end electromagnetic three-way valve 5 normally open end pipeline inserted into the sample bottle 11 that needs to be quantified, but this residue is not included in the measurement data, so when the suction amount reaches the required amount, the lower end electromagnetic three-way valve 5 is switched to the normally closed end to discharge the measured liquid.

[0021] The polytetrafluoroethylene transparent coil 2 is connected by the high-pressure air pump 7 or the plunger pump 6, and the required liquid amount is metered in the polytetrafluoroethylene transparent coil 2 and then discharged, and then the single-chip microcomputer controls the high-pressure air pump 7 to purge the polytetrafluoroethylene transparent coil 2, and generally the non-viscous liquid can be basically purged clean without residue, and for viscous liquids such as petroleum, etc., a solvent can be used for repeated automatic cleaning and then purged clean.

[0022] The above provides a detailed disclosure of the technical solutions of the embodiments of the present application, and the principles and implementation modes of the embodiments of the present application are described by applying specific examples. The above description of the embodiments is only applicable to help understand the principles of the embodiments of the present application. Meanwhile, for those skilled in the art, the embodiments of the present application will have changes in specific implementation modes and application ranges. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A residue-free precision metering isolating pump characterized by: The high-pressure air pump and the plunger pump are connected with the normally open end and the normally closed end of the upper electromagnetic three-way valve respectively, the common end of the upper electromagnetic three-way valve is connected with one end of a polytetrafluoroethylene transparent tube, the polytetrafluoroethylene transparent tube passes through the photocoupler box and is tightly wound with a plurality of turns at the upper end of a cylindrical tube to the lower end of the cylindrical tube to form a spiral tube, the other end of the polytetrafluoroethylene transparent tube is connected with the common end of the lower electromagnetic three-way valve, the normally open end of the lower electromagnetic three-way valve is connected with a sample bottle to be quantified, and the normally closed end is connected with a sample bottle transferred after quantification, the plunger pump, the high-pressure air pump, the upper electromagnetic three-way valve and the lower electromagnetic three-way valve are connected to the single-chip microcomputer control system, and the whole device constitutes a residual-free precise metering isolation pump, the high-pressure air pump is connected with the normally closed end of the upper electromagnetic three-way valve, the normally closed end and the common end of the upper electromagnetic three-way valve are conducted through the single-chip microcomputer control, the airflow of the high-pressure pump enters the polytetrafluoroethylene transparent tube through the upper electromagnetic three-way valve, the residual liquid in the polytetrafluoroethylene transparent tube is taken away by the airflow, the normally closed end of the lower electromagnetic three-way valve is inserted into the sample bottle transferred after quantification, and the residual in the polytetrafluoroethylene spiral tube can be quickly blown clean from the upper end to the lower end.

2. A residue-free precision metering pump according to claim 1, characterized in that: The polytetrafluoroethylene transparent tube adjusts the liquid volume to be metered by selecting different pipe cross-sectional areas, pipe lengths and relative positions of the photocoupler box.

3. A residue-free precision metering pump according to claim 1, characterized in that: When the liquid in the polytetrafluoroethylene transparent tube reaches the specified volume, the single-chip microcomputer control system cuts off the normally closed end connected with the plunger pump of the upper electromagnetic three-way valve, the normally open end connected with the sample bottle to be quantified of the lower electromagnetic three-way valve, simultaneously opens the normally open end connected with the high-pressure air pump and the normally closed end connected with the sample bottle transferred after quantification of the lower electromagnetic three-way valve, and the high-pressure air pump blows clean from the upper end to the lower end of the residual in the polytetrafluoroethylene spiral tube.

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