CN103603970A - Miniature three-way valve - Google Patents

Miniature three-way valve Download PDF

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Publication number
CN103603970A
CN103603970A CN201310561194.8A CN201310561194A CN103603970A CN 103603970 A CN103603970 A CN 103603970A CN 201310561194 A CN201310561194 A CN 201310561194A CN 103603970 A CN103603970 A CN 103603970A
Authority
CN
China
Prior art keywords
valve
miniature
spool
way valve
cone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201310561194.8A
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Chinese (zh)
Inventor
陈亚华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGSU DONGHUA ANALYTICAL INSTRUMENTS Co Ltd
Original Assignee
JIANGSU DONGHUA ANALYTICAL INSTRUMENTS Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JIANGSU DONGHUA ANALYTICAL INSTRUMENTS Co Ltd filed Critical JIANGSU DONGHUA ANALYTICAL INSTRUMENTS Co Ltd
Priority to CN201310561194.8A priority Critical patent/CN103603970A/en
Publication of CN103603970A publication Critical patent/CN103603970A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
    • F16K11/083—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with tapered plug
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
    • F16K27/062—Construction of housing; Use of materials therefor of taps or cocks with conical plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/02—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor
    • F16K5/0207—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor with special plug arrangement, e.g. special shape or built in means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/02—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor
    • F16K5/0242—Spindles and actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/02—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor
    • F16K5/025—Particular coverings or materials

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Multiple-Way Valves (AREA)

Abstract

The invention provides a miniature three-way valve which is used for a titrator during electrochemical analysis and mainly comprises a valve, a valve element, a pressure spring and a pressure cover. The valve is cylindrical, the top of the valve is sealed, a cone is arranged at the upper end of the valve element, and a cylinder is arranged at the lower end of the valve element. Three ports are formed in the valve, and an arc-shaped groove for switching the ports is formed in the cone of the valve element. The valve and the valve elements are made of corrosion-resistant PCTFE (polychloro trifluoroethylene) and PTFE (polytetrafluoroethylene) materials by means of precision machining. The miniature three-way valve has the advantages that the miniature three-way valve is corrosion-resistant and light and is good in sealing performance, high in reliability and compact in structure; the miniature three-way valve does not need to be cleaned after being used for a long time, leakage can be prevented when the ambient temperature changes, and the requirement of the titrator on high precision can be completely met.

Description

Miniature three-way valve
Technical field
The present invention relates to the miniature three-way valve that a kind of titrator is used, belong to electrochemical analytical instrument field.
Background technique
In the titrator of electrochemical analytical instrument, imbibition and the dropping liquid of titrant are switched by three-way valve.High-precision titrator is high, corrosion-resistant to three-way valve precision prescribed, good airproof performance, reliability is high, volume is little.The three-way valve used of tradition titrator is solenoid valve or by motor-driven plain triple valve.Solenoid valve is applied in and on titrator, has some shortcomings: reliability is low, and when solenoid valve open and close are moved, dropping liquid pipeline has a droplet solution a bit of solution that oozes or bounce back, and does not so just reach the high-precision requirement of titrator.Motor-driven plain triple valve is applied in and on titrator, also has some shortcomings: volume is large, not wear-resisting, there will be leakage when variation of ambient temperature is large, and through hole is arranged at valve body top, and seal spool is bad, easily pollutes.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide that a kind of volume is little, lightweight, wear-resisting, corrosion-resistant, good airproof performance, reliable operation, can meet the miniature three-way valve of the high-precision requirement of titrator.
Technological scheme of the present invention is: miniature three-way valve, comprise valve body, spool, holddown spring, friction top, on described valve body, there are three interfaces, the curve bath that has switching interface on spool, its improvements are that described valve body is cylindrical body, body cavity top seal, described spool top is cone, bottom is cylindrical body, the cannelure that there is horizontal curve bath on cone surface and separates with curve bath, and the material of valve body and spool is wear-resisting, corrosion-resistant plastic.
On described valve body, three interfaces are positioned at same cross section, and first interface and the second interface angle are 90 0, the second interface and the 3rd interface angle are 90 0, the curve bath on spool cone is connected first, second interface, or connects second, third interface; The cone part of described spool becomes to be rotatably assorted with body cavity, and the barrel portion of spool becomes Spielpassung with body cavity; Longitudinal groove width 1～1.5mm on the cone of described spool, dark 0.5～1mm; Described wear-resisting, corrosion-resistant plastic is PCTFE or PTFE; The coupling shaft stretching out outside valve body is arranged at the bottom of described spool.
The invention has the beneficial effects as follows: valve body profile is cylindrical, accomplish that compact structure, volume are little.Spool upper end is cone, and lower end is cylindrical body, reduces rubbing surface, regulates friction top, under spring compression, can keep the sealing of cone match, and rotates flexibly, guarantees reliable operation.Valve body lower end perforate packs spool into, and valve body not perforate of upper end makes valve core cone mating part effective sealing, airborne dust can not enter, valve can use for a long time not to be needed to clean, and the cannelure on valve core cone can avoid top to produce vapour lock, guarantees reliable operation.That valve body, spool adopt is wear-resisting, resistant material PCTFE, PTFE precision machining form, temperature influence not, and during temperature variation, valve there will not be leakage.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is A-A place sectional drawing in Fig. 1.
Embodiment
Referring to accompanying drawing, it is that cone, bottom are cylindrical spool 2 that the inner chamber of valve body 1 is equipped with top, regulates threaded friction top 3, and under spring 4 effects, valve core cone part becomes to be rotatably assorted with valve pocket, and column part becomes Spielpassung with valve pocket.Curve bath on valve core cone 6 is positioned at same cross section with first interface 8, the second interface 9, the 3rd interface 10 in cone, spool by bottom coupling shaft 5 under driven by motor rotatable 90 0, make curve bath 6 be communicated with respectively interface 8,9 and interface 9,10, thereby realize imbibition and the titration of titrator.On valve core cone, have and on cannelure 7, valve body, have mounting hole 11.Valve body material is PCTFE(polychlorotrifluoroethylene), valve core material is that PTFE(gets tetrafluoroethylene).

Claims (6)

1. a miniature three-way valve, comprise valve body, spool, holddown spring, friction top, on described valve body, there are three interfaces, the curve bath that has switching interface on spool, is characterized in that described valve body is cylindrical body, body cavity top seal, described spool top is cone, bottom is cylindrical body, the cannelure that there is horizontal curve bath on cone surface and separates with curve bath, and the material of valve body and spool is wear-resisting, corrosion-resistant plastic.
2. by miniature three-way valve described in claim 1, it is characterized in that on described valve body, three interfaces are positioned at same cross section, first interface and the second interface angle are 90 0, the second interface and the 3rd interface angle are 90 0, the curve bath on spool cone is connected first, second interface, or connects second, third interface.
3. by miniature three-way valve described in claim 1, it is characterized in that the cone part of described spool becomes to be rotatably assorted with body cavity, the barrel portion of spool becomes Spielpassung with body cavity.
4. by miniature three-way valve described in claim 1, it is characterized in that the longitudinal groove width 1～1.5mm on the cone of described spool, dark 0.5～1mm.
5. by miniature three-way valve described in claim 1, it is characterized in that described wear-resisting, corrosion-resistant plastic is PCTFE or PTFE.
6. by miniature three-way valve described in claim 1, it is characterized in that the coupling shaft stretching out outside valve body is arranged at the bottom of described spool.
CN201310561194.8A 2013-11-13 2013-11-13 Miniature three-way valve Pending CN103603970A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310561194.8A CN103603970A (en) 2013-11-13 2013-11-13 Miniature three-way valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310561194.8A CN103603970A (en) 2013-11-13 2013-11-13 Miniature three-way valve

Publications (1)

Publication Number Publication Date
CN103603970A true CN103603970A (en) 2014-02-26

Family

ID=50122218

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310561194.8A Pending CN103603970A (en) 2013-11-13 2013-11-13 Miniature three-way valve

Country Status (1)

Country Link
CN (1) CN103603970A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1357111A (en) * 1970-08-25 1974-06-19 Fill M A Control of fluid flow through stopcocks
CN1448712A (en) * 2002-03-29 2003-10-15 中国石油化工股份有限公司 A potentiometric titration instrument
CN2804522Y (en) * 2004-12-13 2006-08-09 江苏江分电分析仪器有限公司 Mini plane reversal valve
CN203532862U (en) * 2013-11-13 2014-04-09 江苏东华分析仪器有限公司 Miniature tee valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1357111A (en) * 1970-08-25 1974-06-19 Fill M A Control of fluid flow through stopcocks
CN1448712A (en) * 2002-03-29 2003-10-15 中国石油化工股份有限公司 A potentiometric titration instrument
CN2804522Y (en) * 2004-12-13 2006-08-09 江苏江分电分析仪器有限公司 Mini plane reversal valve
CN203532862U (en) * 2013-11-13 2014-04-09 江苏东华分析仪器有限公司 Miniature tee valve

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SE01 Entry into force of request for substantive examination
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C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20140226