CN2504446Y

CN2504446Y - Regualtion digital controlled electromagnetic valve

Info

Publication number: CN2504446Y
Application number: CN 00247272
Authority: CN
Inventors: 曾维诚
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-08-10
Filing date: 2000-08-10
Publication date: 2002-08-07
Anticipated expiration: 2010-08-10

Abstract

An adjustable data-control magnetic valve which relates to an executive component in self-control system of flow rate, is supplied by direct current, and comprises n+1 magnetic switches and initial flow regulating units can directly interface with computer. The regulating units ensure the flow rate controlling system to have a higher initial control precision, and match with the computer to realize intelligent regulation of the flow rate.

Description

Adjustable numerical control electromagnetic valve

The utility model relates to a kind of power unit in the automatic flow control system, it controls the flow of fluid jointly with n+1 magnetic switch, the end of the same name of n+1 electromagnetic coil, connect together on electric and receive the positive pole of power supply, the other end of electromagnetic coil is received negative pole by control switch respectively, the delivery outlet of computer is then received the control utmost point of control switch respectively, under the direct effect of computer, realize the digital control and intelligent adjusting of fluid flow, and its adjustable unit can be done accurate the setting to the initial value of its control.Traditional flow regulating unit has pulse width modulated solenoid valve, servovalve, step motor control valve, numerical control electromagnetic valve etc.The flow that pulse width modulated solenoid valve is regulated is discontinuous, the control inaccuracy, and higher because of the switching frequency of solenoid valve, influence useful working life; Servovalve drives spool with actuating motor, accurate control flow rate, and flow also is continuous, could connect with computer but must add special interface circuit, the control circuit more complicated, the actuating motor processing request is also very high; Step motor control valve and servovalve are similar, and also will add special interface circuit could connect with computer, the control circuit complexity, and the stepper motor requirement on machining accuracy is very high; Numerical control electromagnetic valve is the national patent of newly succeeding in developing (patent No. 86208370.2), have its uniqueness simple and reliable, be convenient to the advantage with computer interface, but because structural defective, the very difficult solution of the problem of " gas leakage " and " mutual interference mutually ", and its initial control accuracy has only 1/2 ⁽ⁿ⁺¹⁾, this can't satisfy actual needs in many cases, and the utility model is on the basis of summing up this patent premium properties, corrects shortcoming, develops advantage, constantly perfect result.Compare with 86 2 No. 08370.2 patents, this patent improves except having made unsubstantiality and (improves machining accuracy, the control tolerance fit, the strict material of selecting, change form structure, be convenient to produce in batches, improve heat dispersion etc.) done 5 substantial improvement on the formal structure: 1) the interior Side of T-valve core wide end surface has added Baltimore groove one, to stick into spring, avoid spool spring when to-and-fro motion to get loose, effectively improve operating life, the outer Side of T-valve core wide end surface has added a soft sphere glue, this sphere glue cooperates with seal washer closely, thoroughly solved " gas leakage " problem, spring is also handled through accurate Calculation and strict process, and its life-span is brought up to 2,000 ten thousand times by 500,000 times.2) added a regulon at valve body with respect to the position of maximum control hole, the initial control accuracy of 86 2 No. 08370.2 patents has only 1/2 ⁽ⁿ⁺¹⁾, this can't satisfy actual needs in many cases, added this regulon after, initial control accuracy greatly improves, and can satisfy the needs of working control, and, regulate also very convenient.3) structure of ferromagnetic sleeve of employing and socket cover guarantees that each magnetic switch all has independently magnetic circuit, and this has just fundamentally solved mutual interference problem.4) valve body and valve body are all adopted non-magnet material and are made, and have both avoided the magnetic circuit interlinkage between magnetic switch, have alleviated weight again and have been convenient to processing, also can save external shield.5) owing to added stage clip and ferromagnetic sleeve position regulating unit, the position of ferromagnetic sleeve in valve body can be regulated by ferromagnetic sleeve position regulating unit, this produces in batches for Numerical control valve, and check, calibration after particularly wearing out bring very big convenience.Now do detailed explanation in conjunction with diagrammatic sketch with regard to these several substantial improvement:

Fig. 1 is the three-dimensional side view of the adjustable numerical control electromagnetic valve of n=3, and (1) is adjustable unit, and (2) are valve body, and (3) are outlet connection, and (4) are valve body, and (5) are valve gap.

Fig. 2 (A) is the cutaway view Amplified image of spool, spring, soft sphere glue assembly, and the Baltimore groove of the inboard of spool guarantees that spring snaps in that spring does not get loose when making the spool to-and-fro motion.The spool outside embeds soft sphere glue, and good seal when spool is contacted with the seal washer of valve body and air tight (B) is the spool sectional view of 86 2 No. 08370.2 patent correspondences.

Fig. 3 is the generalized section of adjustable numerical control electromagnetic valve, (5) be valve gap, (4) are valve body, and (6) are ferromagnetic sleeve, (7) be socket cover, (8) be spool, (9) are coil, and (10) are coil rack, (11) be spring, (12) be soft sphere glue, (13) are seal washer, and (2) are valve body, (3) be outlet connection, (14) inlet union, (15) are plastic nut, and (16) are adjusting screw, (17) be the general export passage, (18) be the general import passage, (19) are stage clip, and (20) are ferromagnetic sleeve position regulating unit.The valve body of 86 2 No. 08370.2 patents processes with a unified ferromagnetic material, the magnetic circuit interlinkage is arranged between magnetic switch and cause interference, each magnetic switch of this patent has independently magnetic circuit and valve body make with non-magnetic conduction material, the interference that this has just fundamentally eliminated the magnetic circuit interlinkage between magnetic switch and has produced has therefrom improved the reliability of work.The adjustable unit that is provided with on the valve body is made up of plastic nut and auxiliary adjustment screw, screw thread between them adopts closely-pitched to cooperate, the outside thread of plastic nut screws in valve body with coarse thread, the medial axis of the maximum control hole of axis alignment wherein, plastic nut and valve body are combined closely and are not become flexible, auxiliary adjustment screw and plastic nut tolerance fit are good, and be air tight when guaranteeing to regulate.Stage clip is a corrugated circle, make with p-cu peel, before packing a valve body n+1 aperture into, ferromagnetic sleeve puts earlier in the aperture as valve body, valve gap and valve body are combined closely with being no less than 6 screws, the regulon that is contained on the valve gap makes the position of ferromagnetic sleeve in the valve body aperture that the regulation range that is not less than 0.8mm be arranged, guarantee the check calibration of the particularly aging back of Numerical control valve batch process, can reach practical requirement.

Claims

1, a kind of adjustable numerical control electromagnetic valve that is used to control fluid flow, by valve body, valve body, valve gap, inlet union, outlet connection, ferromagnetic sleeve, socket cover, stage clip, ferromagnetic sleeve position regulating unit, electromagnetic coil, coil rack, spool, spring, soft sphere glue, seal washer, plastic nut, the auxiliary adjustment screw is formed, it is characterized in that its inlet union is connected with controlled fluid by flexible pipe, outlet connection is connected with controll plant by flexible pipe, the end of the same name of n+1 electromagnetic coil, connect together on electric and receive the positive pole of power supply, the other end of electromagnetic coil is received negative pole by control switch respectively, the delivery outlet of computer is then received the control utmost point of control switch respectively, under the direct effect of computer, realize the digital control and intelligent adjusting of fluid flow, and its adjustable unit can be done accurate the setting to the initial value of its control.

2, according to claim 1, described adjustable numerical control electromagnetic valve, it is characterized in that valve body, outlet connection, seal washer, plastic nut, valve body assembly of auxiliary adjustment screw composition, valve body has n+1 control hole, and the ratio of control hole internal diameter is by 2 ⁿ(n=0,1,2,3, ... .) arrange, the maximum value of n determines that by control accuracy seal washer is embedded on the control hole of valve body, and valve body has a general export hole, the internal diameter of exit orifice is determined by the total discharge of controlled fluid, outlet connection is received on the general export hole, and n+1 control hole all is communicated with the general export hole, has an adjustment hole at the relative position of maximum control hole, in adjustment hole, be inlaid with plastic nut, the spinning in and out within it of auxiliary adjustment screw, to regulate the initial value of flow, valve body is made with non-magnetic rigid material.

3, according to claim 1, described can regulate numerical control electromagnetic valve, it is characterized in that valve body, stage clip, valve gap, the sleeve position regulating unit, inlet union is formed an assembly, valve body also has n+1 hole, the internal diameter in hole is identical, stage clip places in the hole, the size in aperture is can put into ferromagnetic sleeve degree of being, valve body has a general import hole, inlet union is received on the general import hole, there is path in n+1 hole and general import hole, and valve gap also has n+1 screw, the spinning in and out within it of sleeve position regulating unit in the position relative with valve body, regulate ferromagnetic sleeve and the socket cover relative position in valve body, valve body is made with non-magnetic rigid material.

4, according to claim 1, described can regulate numerical control electromagnetic valve, it is characterized in that valve gap, ferromagnetic sleeve position regulating unit, assembly of stage clip composition, valve gap is made with non-magnetic rigid material, and combine closely with valve body, stage clip was put into a valve body n+1 aperture earlier before putting into ferromagnetic sleeve, make the position of ferromagnetic sleeve in valve body come trace to regulate by regulon.

5, according to claim 1, described can regulate numerical control electromagnetic valve, it is characterized in that each control hole all has ferromagnetic sleeve and socket cover, they form n+1 separate closed magnetic circuit, interlinkage not mutually each other, their external diameter is can put into valve body degree of being, internal diameter then depends on the external diameter of electromagnetic coil, and ferromagnetic sleeve and socket cover are made with the ferromagnetic material of high permeability.

6, according to claim 1, described can regulate numerical control electromagnetic valve, it is characterized in that assembly of electromagnetic coil and coil rack composition, external diameter is can put into ferromagnetic sleeve degree of being, internal diameter depends on the external diameter of spool, guarantee that spool can unrestricted motion in coil rack, the line of the electromagnetic wire footpath and the number of turns are determined according to actual conditions in the electromagnetic coil.

7, according to claim 1, described can regulate numerical control electromagnetic valve, it is characterized in that spool, spring and assembly of soft sphere glue composition, the T-shaped shape of spool, its outside than large end face is inlaid with soft sphere glue, guarantee that the seal washer driving fit on spool and the control hole is good, interior Side has a Baltimore groove, and spring snaps in the Baltimore groove, spring does not get loose when guaranteeing that spool moves back and forth, and spool is made with the ferromagnetic material of high permeability.