CN2619165Y - Double voltage electric ceramic lighting gas valve - Google Patents

Abstract

A dual piezoelectric ceramic fire-striking gas-fired valve comprises a valve seat, a valve body, a valve stem, a valve core, a position limiter, a dial wheel, a valve core pressing spring, a shooting spring, a hammer, a piezoelectric ceramic component, a layering, and a location lock spring etc. The present utility is characterized by: the hammer, the shooting spring, the piezoelectric ceramic component which are respectively installed in two square channels arranged on the valve seat are provided two sets; two teeth whose difference angle is the same as relative angle of two hammers are disposed on the dial wheel. Due to using the design of dual piezoelectric ceramic and dual dial wheel, two electric sparks are generated in one ignition operation, increasing the discharge point, boosting the ignition energy, designing the ignition of dual piezoelectric ceramic at the optimal time and designing the discharge point of the two electric sparks at different places according to requirement, so as to enhance the ignition rate and improve the domestic appliance's adaptation to combustible gas and security of domestic appliance.

Description

Double piezoelectric ceramic sparking gas valve

Technical field

The utility model relates to the gas valve of gas kitchen ranges, particularly adopts the gas valve of double piezoelectric ceramic igniting.

Background technology

The fuel gas kind that is used for gas kitchen ranges is more, even with a kind of gas, also there being bigger difference qualitatively, because fuel gas is poisonous, flammable, has certain danger.Therefore, whether gas kitchen ranges can just seem particularly important by the reliable ignition fuel gas, and the height of the rate of catching fire is an important indicator estimating gas kitchen ranges, also is the leading indicator of sparking gas valve.

Generally believe that under the premise that security is guaranteed, the height of the rate of catching fire is closely related with the energy of opportunity that produces electric spark and electric spark, and the energy of piezoelectric ceramics generation high-voltage spark depends on the mechanical energy that acts on the piezoelectric ceramics.Only on appropriate opportunity, the electric spark that imposes sufficient intensity could guarantee rate of catching fire and some fire safety, and this is two design principles the most basic of sparking gas valve.The duration of ignition of existing piezoelectric ceramics sparking gas valve, all design about 80 ° of valve rotations, that is: both guaranteed certain fuel gas at ignition zone, and be unlikely to make fuel gas excessively to fill the air beyond ignition zone again, too early or slow excessively raising and the some fire safety that all is unfavorable for the rate of catching fire.And CN 2526692Y (patent No. 02225208.8) disclosed " a kind of gas-cooker piezoelectric ceramics doubles fire gas valve ", and do not meet this two principle.At first, it has increased a moving tooth before the direction of rotation of the former moving tooth of existing single piezoelectric ceramics sparking gas valve " shifting block ", makes that hammer bump piezoelectric ceramics is by once becoming twice in ignition operation.In order in the angle of valve half-twist, to finish twice sparking, the time of lighting a fire for the first time must be advanceed to and be not more than 45 ° position, obviously this is not the best opportunity of igniting, thereby has reduced the validity of igniting for the first time; Secondly,, make the static position of hammer after the mainspring direction, move,, reduced the kinetic energy of hammer owing to the distance that has shortened hammer movement though increased the static pressure of mainspring counter-blow hammer slightly owing to increase moving tooth.

Summary of the invention

The utility model purpose is: a kind of safe and reliable, the rate of catching fire height of lighting a fire is provided, can produces the double piezoelectric ceramic sparking gas valve of two sufficient intensity electric sparks simultaneously in the appropriate time in an ignition operation.The purpose of this utility model adopts following design to realize:

Double piezoelectric ceramic sparking gas valve comprises valve seat, valve body, valve rod, spool, limited block, thumb wheel, spool stage clip, mainspring, hammer, piezo ceramic element, press strip, alignment pin etc.; It is characterized in that: hammer, mainspring, piezo ceramic element respectively are two covers, are contained in respectively in two square guide grooves on the valve seat; Thumb wheel is provided with a difference angle and two moving teeth that the hammer relative angle is identical.

Valve rod is through in the hole of valve seat, and the flat end end of valve rod is embedded in the groove of spool end.

Limited block is provided with a straight washer and a bending washer.

At the straight washer place of limited block initial position, valve seat is provided with a radius and the straight washer inside groove that height and bending washer height adapt that adapts.

At the bending washer place of limited block initial position, valve seat is provided with the alignment pin of restriction valve rod to opposite spin.

When valve rod is begun to rotate by initial position, two on the thumb wheel pull out the driving lever that tooth is stirred two hammers respectively, make hammer compression mainspring store mechanical energy, when valve rod rotates to about 80 °, the driving lever of moving tooth and hammer is thrown off, at this moment, hammer loses support, the mechanical energy that mainspring stores discharges rapidly, two hammers clash into piezo ceramic element respectively with maximal rate, two piezo ceramic elements produced simultaneously instant high-voltage under the mechanical energy effect produces the spark discharge of two sufficient intensities respectively by two spray points.

Remarkable result of the present utility model is: owing to adopted the two moving tooth designs of double piezoelectric ceramic, can produce two electric sparks in an ignition operation, increased point of discharge, improve ignition energy; Change the relative angle of the two moving teeth on the thumb wheel, two electric sparks can be simultaneously or timesharing produce, the igniting of double piezoelectric ceramic can be designed in the best opportunity, and can be as required with the point of discharge design of two electric sparks in different positions, thereby improved the rate of catching fire of igniting greatly, improved kitchen range the adaptability of different fuel gas and the security of kitchen range.

Description of drawings

Fig. 1 is a structural representation of the present utility model

Fig. 2 is the figure that laterally cuts open of the present utility model

Fig. 3 is a thumb wheel schematic diagram of the present utility model

Fig. 4 is a limited block schematic diagram of the present utility model

The specific embodiment

Be example now, in conjunction with the accompanying drawings structure of the present utility model and course of action described in detail with the gas valve that is used for common Internal and external cycle dual-range-head:

As shown in Figure 1, the utility model comprises 1. valve seats, 2. valve body, 3. valve rod, 4. spool, 5. limited block, 6. thumb wheel, 7. spool stage clip, 8. mainspring, 9. hammer, 10. piezo ceramic element, 11. press strips, 12. alignment pins etc.; Wherein mainspring (8), hammer (9), piezo ceramic element (10) respectively are two covers, are contained in respectively in two square guide grooves of valve seat (1) upper and lower sides; Press strip (11) covers mainspring (8), hammer (9), piezo ceramic element (10) in guide groove, piezo ceramic element (10) is fixed by the beading of one indent on the press strip (11), hammer (9) can slide along axis direction in square guide groove, and mainspring (8) slides with hammer (9) and stretches; In valve seat (1), valve rod (3) is housed in the valve body (2), spool (4), wherein valve rod (3) is through in the hole of valve seat (1), spool (4) is formed rotatable gas valve in valve body (2), limited block (5) is sleeved on the flat bottom portion position of valve rod (3), when the gas valve initial position, the straight washer of limited block (5) is inlaid in the inside groove of valve seat (1), alignment pin (12) on the valve seat (1) withstands the bending washer of limited block (5), restriction valve rod (3) is to opposite spin, thumb wheel (6) is sleeved on the flat end of spool (4), thumb wheel (6) is provided with two difference angle and the identical moving tooth of two hammers (9) static position relative angle, spool stage clip (7) is pressed in limited block (5) and thumb wheel (6) on definite position and can not slides arbitrarily along the axis direction of valve rod (3) respectively, the flat end end of valve rod (3) is embedded in the groove of spool (4) end, is used for roof pressure and opens ignite valve and transmission rotation torque.

When pushing valve rod (3), limited block (5) is held up by valve rod (3), the ratchet of limited block (5) breaks away from the restriction of valve seat (1) positioning step, valve rod (3) begins rotation by initial position, spool (4) is driven to rotate, be installed in the limited block (5) on the valve rod (3) and be installed on the spool (4) thumb wheel (6) also together the rotation.Two moving teeth on thumb wheel this moment (6) are stirred the driving lever of double-clicking hammer (9) respectively, make hammer (9) compress mainspring (8) storage power backward; When valve rod (3) rotates to about 80 °, the driving lever of moving tooth and hammer (9) is thrown off, hammer this moment (9) loses support, mainspring (8) energy stored discharges rapidly, two hammers (9) are respectively with maximal rate bump two piezo ceramic elements (10), piezo ceramic element (10) produces instant high-voltage under the mechanical energy effect, and produces the electric spark ignited flammable gas of two sufficient intensities by two igniting pins; When valve rod (3) rotates to 90 °, gas valve will lead to the main airway of outer ring kitchen range and lead in the auxilliary air flue of kitchen range open to maximum; When valve rod (3) rotates to 180 °, the bending washer of limited block (5) changes the inside groove of valve seat (1) over to, because the bending washer is subjected to the restriction of valve seat (1) inside groove, valve rod (3) can not be made racking, the ratchet of limited block (5) is limited by the positioning step on the valve seat, makes valve rod (3) can not continue rotation.This moment, the main airway of gas valve was closed, and auxilliary air flue is communicated with interior kitchen range by the micro-hole on the spool (4); When valve rod (3) turns clockwise 180 ° when returning to initial position, limited block (5) the bending washer pin (12) that is positioned withstands, and makes valve rod (3) can not continue rotation.This moment, valve was closed fully, had so far finished the overall process of an ignition operation.

Claims (5)

1 double piezoelectric ceramic sparking gas valve, comprise valve seat (1), valve body (2), valve rod (3), spool (4), limited block (5), thumb wheel (6), spool stage clip (7), mainspring (8), hammer (9), piezo ceramic element (10), press strip (11), alignment pin (12) etc., it is characterized in that:

A hammer (8), mainspring (9), piezo ceramic element (10) respectively are two covers, are contained in respectively in two square guide grooves on the valve seat (1);

B thumb wheel (6) is provided with two difference angle and the identical moving tooth of the static relative angle of two hammers (9).

2 according to claim 1 pairs of piezo-electric ignition burnt gas switch is characterized in that: valve rod is through in the hole of valve seat (1), and the flat end end of valve rod (3) is embedded in the groove of spool (4) end.

3 according to claim 1,2 described pairs of piezo-electric ignition burnt gas switch, it is characterized in that: limited block (5) is provided with a straight washer and a bending washer.

4 according to claim 1,2 described pairs of piezo-electric ignition burnt gas switch, it is characterized in that: at the straight washer place of limited block (5) initial position, valve seat (1) is provided with the straight washer of a radius and limited block (5) inside groove that height and limited block (5) bending washer height adapt that adapts.

5 according to claim 1,2 described pairs of piezo-electric ignition burnt gas switch, it is characterized in that: at the bending washer place of limited block (5) initial position, valve seat (1) is provided with the alignment pin (12) of restriction valve rod (3) to opposite spin.

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