CN2260932Y

CN2260932Y - Self-suction type electromagnetic valve with conic magnet

Info

Publication number: CN2260932Y
Application number: CN 96210699
Authority: CN
Inventors: 盛经纬
Original assignee: AUTOMATION INST CHINA LIGHT INDUSTRY GENERAL ASSOCIATION
Current assignee: AUTOMATION INST CHINA LIGHT INDUSTRY GENERAL ASSOCIATION
Priority date: 1996-04-30
Filing date: 1996-04-30
Publication date: 1997-08-27
Anticipated expiration: 2006-04-30

Abstract

The utility model relates to a self-absorption electromagnetic valve, particularly a low-voltage and self-absorption type electromagnetic valve which is used as a control device for gas water-heaters. The utility model comprises a stop seat, an armature iron with a valve cushion, an attracting coil and a sustaining coil which are controlled by a control circuit, and the return spring of the armature iron. The utility model is characterized in that the end part of the attraction end of the stop seat and the armature iron is respectively provided with an outward convex conical head and an inward concave conical hole which cause the stop seat and the armature iron to be attached at the conical surface. Compared with the existing self-absorption electromagnetic valve with same specification, the utility model has long working stroke, and solves the problems that the gas water-heater can not reach to the set value of the heat load; the valve is unreliably opened, etc. The utility model also has the advantages of simple structure, easy production, etc.

Description

The self-priming solenoid valve of band conic magnet

The utility model relates to a kind of self-priming solenoid valve, especially is used as the self-priming solenoid valve of low pressure of control gear in gas water-heater.

The existing self-priming solenoid valve that is used for gas water-heater can be seen from Fig. 2.It includes the armature 6 that ends seat 2, bottom band valve pad 9, (wherein 41 for inhaling moving winding, 42 for keeping coil to be installed in annulus

cylindrical solenoid

41 and 42 on the skeleton 3, they are respectively by lead-in wire I, II Access Control circuit 10, and have a common ground III), they are installed on the base plate 7, and base plate top has case 1, the spring 8 that can make armature make downward reseting movement is equipped with in the bottom.This self-priming solenoid valve is contained on the housing 14 of gas water-heater, and with the keying of valve pad 9 one control air valve 12, the utensil right side had gas inlet pipe 11, the left side has steam outlet pipe 13 (utensil 14 and air valve 12 are all represented with double dot dash line).Armature among Fig. 2 is to reset under the spring force effect, and at this moment valve pad has been closed air valve, thereby combustion gas is cut off into and out of tracheae; Be switched on as control circuit, then armature 6 in guide pin bushing 5 upwards motion and with end a seat adhesive, valve pad 9 is just upwards opened, combustion gas can flow into steam outlet pipe by suction tude, shown in dotted arrow among the figure.The shortcoming of this self-priming solenoid valve is: armature is the plane with the surface of contact that ends seat, so working stroke H is shorter, and the aperture that causes valve pad to make progress is big inadequately, thereby produces water heater does not reach heat load because of the deficiency of gas flow setting value; In addition, when gaseous-pressure upwards fluctuateed, because of the back pressure P of valve pad may produce armature adhesive difficulty greatly, that is valve pad can not upwards open, thus it to open valve events unreliable.In addition,

coil

41 and 42 is contour, and in fact keep armature open magnetic intensity required on the valve position at this should be at position on the upper side, therefore in this contour loop construction, its magnetic field energy of keeping coil can not be fully utilized.

The purpose of this utility model is to overcome the shortcoming that exists in the above-mentioned prior art, and the self-priming solenoid valve of the band conic magnet that a kind of working stroke is long, switch is reliable and power consumption is little is provided, and makes it have characteristics such as simple in structure, low cost of manufacture.

The self-priming solenoid valve of band conic magnet includes the armature that ends seat, band valve pad, be installed on the skeleton by the pull-in winding of control circuit control and the spring of keeping coil, armature being resetted; Characteristics of the present utility model are: have evagination nose cone, the indent conical bore that they are fitted with conical surface respectively in the adhesive end end of ending seat and armature, that is the indent conical bore that ends that the seat end has the evagination nose cone, armature end has and coincide with the evagination nose cone size of ending seat, shape safety, perhaps end the seat end and have indent conical bore, armature end and have the evagination nose cone that size, shape safety are with it coincide.

The longitudinal section profile that the suction of the self-priming solenoid valve of the utility model is moved, kept after the assembling of two coils is a stepped shaft, and keeps the aspect ratio suction moving winding weak point of coil.

To and contrast accompanying drawing by embodiment below, the utility model will be further described below.

Have in the accompanying drawing:

Fig. 1 is the main sectional view of the self-priming solenoid valve of the utility model.

Fig. 2 is the main sectional view of self-priming solenoid valve of the prior art.

From Fig. 1 see the self-priming solenoid valve of band conic magnet include the armature 6 that ends seat 2 and band valve pad 9 that is installed in the cylindrical guide pin bushing 5, be installed on the skeleton 3 by the annulus cylindricality pull-in winding 41 of control circuit 10 controls and keep coil 42, they are installed on the base plate 7, by case 1 closure, and Returnning spring 8 has been installed between base plate 7 is with valve pad 9.Inhale moving winding and keep coil that to stretch out case with lead-in wire I, II and common ground III respectively outer and be connected on the control circuit 10.Solenoid valve in the present embodiment is installed on the housing 14 of gas water-heater, and its valve pad 9 can directly open and close the air valve 12 of water heater, to be communicated with or to cut off the gas inlet pipe 11 and the steam outlet pipe 13 of water heater.Air valve 12 among Fig. 1, housing 14, turnover tracheae 11 and 13 all represent with double dot dash line, the gas flow the when dotted arrow on the turnover tracheae is represented the air valve breakdown respectively to.From Fig. 1, can see that the end of ending seat of the utility model solenoid valve is the indent conical bore that nose cone, armature 6 ends have and this cone headed size, shape match of evagination, when electromagnetic actuation, nose cone can be fitted fully with conical bore, has formed conical surface of contact.

It is that the end that the nose cone of evagination ends iron 2 has and the nose cone size of armature, the female cone hole that shape fits like a glove that the utility model solenoid valve also can adopt the end of armature 6.

Can see also that from Fig. 1 the profile in two coils 41 in the utility model solenoid valve and its longitudinal section, 42 combination back is a stepped shaft, and is positioned at the height that the peripheral height of keeping coil 42 is lower than suction moving winding 41.

The working condition of self-priming solenoid valve on water heater of the utility model band conic magnet is: during water boiling heater, earlier with the power supply in the water-control switch connection control circuit 10, this circuit is promptly to inhaling moving winding 41 output operating currents, armature 6 promptly overcomes resistance upwards motion in guide pin bushing 5 of spring 8, until with end seat and fit fully, also breakdown air valve 12 upwards of valve pad under the armature 9 this moment, combustion gas turnover tracheae 11,13 are connected, meanwhile control circuit 10 is kept electric current to keeping coil 42 outputs, and cut off operating current automatically, armature is maintained with on the position of ending the seat adhesive, to keep the breakdown state of combustion gas air valve, the water heater proper functioning.As closing water heater, then water-control switch cuts off the power supply in the circuit 10, keeping electric current stops, armature moves down at the effect lower edge of spring 8 guide pin bushing 5, till the valve pad 9 closed air valves 12 of its bottom, realize the cut-out of combustion gas turnover tracheae, Fig. 1 is the state position of the solenoid valve of this air valve when closing.

The advantage of the utility model self-suction type electromagnetic valve is: 1) in the adhesive that ends seat, armature Contact-making surface is improved to after the taper seat by the plane of prior art, and the impulse stroke H of armature The existing self-suction type electromagnetic valve of same specification is big, since the increasing of the trip, the valve on the air valve Big, the gas flow of pad aperture is big and pressure drop is little, thereby gas heater in use can be reached To the thermic load of setting; Meanwhile, electromagnetic attraction can overcome because of gaseous-pressure effectively Fluctuation and become big back pressure P at valve pad makes out valve events reliable; 2) two coil groups Vertical section shape after closing changes stairstepping into by rectangle, that is the keeping coil height be lower than inhale moving After the coil, improve the utilization rate of keeping coil magnetic field energy, increased the keeping coil suction The reliability of closing; 3) simple in structure, easily manufactured.

Claims

1, end seat (2) a kind of including, the armature (6) of band valve pad (9), be installed on the skeleton (3) by the pull-in winding (41) of control circuit (10) control and keep coil (42), can make the self-priming solenoid valve of the band conic magnet of the spring (8) that armature resets, it is characterized in that: have the evagination nose cone that they are fitted with conical surface respectively in the adhesive end end of ending seat (2) and armature (6), the indent conical bore, that is only a seat end has nose cone, armature end has and the nose cone size, the conical bore that shape fits like a glove, perhaps armature end has nose cone, end the seat end and have size with it, the conical bore that shape fits like a glove.

2, self-priming solenoid valve as claimed in claim 1 is characterized in that: said suction moving winding (41) and the longitudinal section of keeping after coil (42) is assembled are stepped shaft, and keep the aspect ratio suction moving winding weak point of coil.