CN212338233U

CN212338233U - Plug valve and gas stove

Info

Publication number: CN212338233U
Application number: CN202021835509.5U
Authority: CN
Inventors: 艾穗江; 杜欢乐; 陈德龙
Original assignee: Guangdong Macro Gas Appliance Co Ltd; Guangdong Wanjiale Kitchen Technology Co Ltd
Current assignee: Guangdong Macro Gas Appliance Co Ltd; Guangdong Wanjiale Kitchen Technology Co Ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-01-12
Anticipated expiration: 2030-08-28

Abstract

The utility model discloses a plug valve, include: a valve body provided with a first cavity; a valve upper cover connected to the valve main body; the valve core is rotatably connected in the first cavity; the valve rod comprises a pressing part and a rotation stopping part from top to bottom, the pressing part is provided with an arc side surface and a clearance side surface, the rotation stopping part is in rotation stopping fit with the valve core and is in up-down movable fit with the valve core, and a reset mechanism is arranged between the rotation stopping part and the valve core; the child lock structure comprises a right-handed limiting block, a left-handed limiting block and a terminal limiting block, wherein the limiting depth of the left-handed limiting block is not more than the pressing stroke of the valve rod; and the micro switch is arranged on the valve upper cover, and the rotating movement path of the arc side surface is intersected with the micro switch. Compared with the prior art, the utility model discloses change into the rotatory contact relation with valve rod and micro-gap switch's the contact relation of pressing, just the utility model discloses a plug valve has simplified the assembly process of cock valve, has improved the assembly efficiency of cock valve. And simultaneously, the utility model also provides a gas-cooker of using above-mentioned plug valve.

Description

Plug valve and gas stove

Technical Field

The utility model relates to a cooking utensils technical field, in particular to plug valve and gas-cooker.

Background

The plug valve is an essential part of the gas stove, and can adjust the flame size of the gas stove besides opening or closing the gas stove. Since the knob of the cock valve is disposed on the upper surface of the gas range so that anyone can touch it, a child lock mechanism needs to be provided in the cock valve for safety, thereby preventing the knob from being erroneously triggered.

As shown in fig. 1, which is a cross-sectional view of a prior art plug valve, as shown in fig. 2, which is an exploded view of a child lock mechanism of the prior art plug valve, it can be seen that the prior art child lock mechanism includes a child lock spring 21, a microswitch presser plate 22, a child lock plate 23, a clamp spring 24, and a protrusion 31 in a valve upper cover 30, wherein the child lock plate is connected with a valve stem 10 in a rotation stop manner, and the child lock plate is provided with a recess 25 matched with the protrusion. When a user does not apply downward pressure on the valve rod, the concave part on the child lock piece is clamped with the protrusion on the upper cover of the valve under the action of the child lock spring, so that the valve rod cannot be rotated; when the user applies downward pressure to the valve rod, the concave part of the child lock plate is separated from the bulge of the valve upper cover, so that the valve rod can be rotated, and the micro switch pressing sheet presses the micro switch 40 at the moment, so that the ignition needle of the gas stove is started. However, in actual production, the inventor found that the conventional plug valve has a complicated assembly process due to a large number of parts, low assembly efficiency, and inconvenience in after-sales maintenance, and therefore, a plug valve having a simple assembly relationship is required.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a plug valve that solves one or more of the problems of the prior art and provides at least one of the advantages of the prior art.

The utility model also provides a gas-cooker with above-mentioned plug valve.

According to the utility model discloses a plug valve of first aspect embodiment includes:

the valve comprises a valve main body, a valve seat and a valve seat, wherein the valve main body is provided with an air inlet channel, an air outlet channel and a first cavity, the first cavity comprises a first upper cavity and a first lower cavity, and the air inlet channel and the air outlet channel are communicated with the first lower cavity;

a valve upper cover connected to the valve main body;

the valve core is rotatably connected in the first cavity, and the valve main body adjusts the flow rate between the air inlet channel and the air outlet channel by rotating the valve core;

the valve comprises a valve rod and a valve core, wherein the valve rod comprises a pressing part and a rotation stopping part from top to bottom, the pressing part is provided with an arc side surface and a clearance side surface, the rotation stopping part penetrates through the valve upper cover from top to bottom, the rotation stopping part is provided with a rotation stopping block extending outwards, the valve core is provided with a limiting groove matched with the rotation stopping block for use, so that the valve rod and the valve core are in rotation stopping and up-down movable fit, and a reset mechanism capable of resetting the valve rod upwards is arranged between the rotation stopping part and the valve core;

the child lock structure is arranged in the first upper cavity and comprises a right-handed limiting block, a left-handed limiting block and an end-point limiting block, the rotation stopping block penetrates through the limiting groove and extends into the first upper cavity, a starting point space capable of accommodating the rotation stopping block is arranged between the right-handed limiting block and the left-handed limiting block, the maximum limiting depth of the left-handed limiting block is not greater than the depth of the limiting groove, and the maximum limiting depths of the right-handed limiting block and the end-point limiting block are both greater than the depth of the limiting groove;

and the microswitch is arranged on the valve upper cover, the initial position of the pressing part is positioned above the microswitch, the rotary moving paths of the clearance side surface and the rotation stopping part are not intersected with the microswitch, and the rotary moving path of the arc side surface is intersected with the microswitch.

According to the utility model discloses plug valve has following beneficial effect at least: when the gas stove needs to be started, only the valve rod needs to be pressed downwards, at the moment, the rotation stopping block leaves the limiting range of the left-handed limiting block, so that the valve rod can rotate in the anticlockwise direction, the valve core rotates along with the rotation of the valve rod, the plug valve adjusts the flow rate between the gas inlet channel and the gas outlet channel by rotating the valve core, and meanwhile, the arc side surface of the pressing part contacts with the microswitch along with the rotation of the valve rod; when the pressing force on the valve rod is removed, the reset mechanism drives the valve rod to reset upwards, and the pressing part is positioned above the micro switch again at the moment, so that the micro switch is prevented from being continuously contacted with the arc side surface. Compared with the prior art, the utility model discloses change into the rotatory contact relation with valve rod and micro-gap switch's the contact relation of pressing to this evades assembly error, just the utility model discloses a plug valve has simplified the assembly process of plug valve, has improved the assembly efficiency of plug valve to be favorable to the after-sales repair of plug valve.

According to some embodiments of the utility model, the case is equipped with the second cavity, be equipped with the spacing portion that has circular through-hole in the second cavity, spacing portion will the second cavity divide into cavity and second cavity down on the second.

According to some embodiments of the utility model, canceling release mechanical system includes valve ejector pin and pre-compaction spring, the top of valve ejector pin and the bottom butt of valve rod, the valve ejector pin down passes from last the circular through-hole of spacing portion extends to in the second cavity of resorption, the pre-compaction spring is located in the second cavity of resorption, the pre-compaction spring housing is established outside the valve ejector pin, the valve ejector pin passes through the pre-compaction spring upwards resets. The bottom surface of the valve rod is provided with a positioning hole, the top surface of the valve ejector rod is provided with a positioning block extending outwards, and the positioning block is arranged in the positioning hole in a matching mode, so that the valve rod and the valve ejector rod are prevented from being dislocated.

According to some embodiments of the utility model, be equipped with seal assembly in spacing portion, the seal assembly cover is established outside the valve ejector pin, pre-compaction spring's lower extreme with the seal assembly butt, on the second the cavity with the cavity passes through under the second seal assembly seals. The sealing assembly comprises a gasket and a sealing ring, the prepressing spring, the gasket and the sealing ring are sequentially arranged from top to bottom, the prepressing spring can provide prepressing force for the gasket besides the upward resetting function provided by the valve ejector rod so as to enhance the sealing effect of the sealing ring, and the gas leakage from the second lower cavity to the second upper cavity is avoided.

According to some embodiments of the utility model, be equipped with the solenoid valve on the inlet channel, the solenoid valve is in be equipped with touch switch under the valve ejector pin, touch switch with distance between the valve ejector pin is not more than the degree of depth of spacing groove. When the valve ejector rod is pressed and contacts with the touch switch, the electromagnetic valve conducts the gas pipe with the gas inlet channel, and after the combustor is ignited successfully, the thermocouple on the burner of the combustor is heated and controls the electromagnetic valve to be kept open.

According to some embodiments of the present invention, the inner wall of the first lower cavity is an inverted conical surface, and the outer wall of the valve element is matched with the inner wall of the first lower cavity, so that the first lower cavity and the first upper cavity can be sealed by the valve element, thereby preventing the gas from leaking from the first lower cavity to the first upper cavity; the valve core is provided with a gas outlet communicated with the gas outlet channel at the position of the second lower cavity, the gas inlet channel is communicated with the second lower cavity, and the overlapping area between the gas outlet channel and the gas outlet of the valve core is changed by rotating the valve core, so that the flow rate between the gas inlet channel and the gas outlet channel is adjusted.

According to some embodiments of the utility model, the levogyration stopper is established the lower bottom surface of valve upper cover, the dextrorotation stopper with the terminal point stopper is all established in the valve main part, the terminal point is in the dextrorotation stopper with carry out spacing rotation in the space between the terminal point stopper.

According to some embodiments of the utility model, the lower bottom surface of levogyration stopper is the inclined plane, the inclined plane is downward towards the direction slope of dextrorotation stopper. The inclined plane is arranged, so that the rotation stopping block can return to the starting point space without pressing when rotating clockwise.

According to some embodiments of the utility model, micro-gap switch is equipped with the contact piece, it is used for right to cover on the valve the contact piece carries out spacing contact stopper. The contact piece limiting block is used for limiting the swinging amplitude of the contact piece, and the problem that the contact piece and the pressing part of the valve rod are interfered due to excessive swinging of the contact piece is avoided.

According to the utility model discloses a gas-cooker of second aspect embodiment, including combustor and foretell plug valve, the combustor includes furnace end and ignition needle, the plug valve is equipped with at least two air outlet channel, every air outlet channel all is connected with air outlet nozzle, all air outlet nozzle all with the furnace end is connected, micro-gap switch with ignition needle electric connection.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a cross-sectional view of a prior art plug valve;

FIG. 2 is an exploded view of a prior art plug valve;

FIG. 3 is a schematic perspective view of a plug valve according to an embodiment of the present invention;

FIG. 4 is a top plan view of the plug valve shown in FIG. 3;

FIG. 5 is a cross-sectional view of the plug valve of FIG. 4 taken along line A-A;

FIG. 6 is a cross-sectional view of the plug valve of FIG. 4 taken along line B-B;

FIG. 7 is an exploded view of a plug valve according to an embodiment of the present invention;

fig. 8 is a schematic perspective view of a valve body according to an embodiment of the present invention;

fig. 9 is a cross-sectional view of a valve body and a valve cover according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

As shown in fig. 3 to 7, a plug valve according to an embodiment of the first aspect of the present invention includes a valve main body 100, a valve upper cover 200, a valve core 300, a valve rod 400, and a micro switch 500, wherein the valve main body 100 is provided with an air inlet passage 110, an air outlet passage 120, and a first cavity 130, the air inlet passage 110 is provided with a solenoid valve 600, and the solenoid valve 600 is used to communicate a gas pipe (not shown in the drawings) with the air inlet passage 110; the first cavity 130 includes a first upper cavity 131 and a first lower cavity 132, the gas inlet channel 110 and the gas outlet channel 120 are both communicated with the first lower cavity 132, the inner wall of the first lower cavity 132 is an inverted conical surface, that is, the inner diameter of the first lower cavity 132 increases from bottom to top in sequence, and the inner diameter of the first upper cavity 131 is greater than the maximum inner diameter of the first lower cavity 132; the number of the air outlet channels 120 is two, each air outlet channel 120 is connected with an air outlet nozzle 121, and the air outlet nozzles 121 are used for being connected with a burner of a burner (not shown in the figures) and conveying fuel gas for the burner. The upper valve cover 200 is connected to the valve main body 100, the upper valve cover 200 is provided with a mounting hole 210 for the valve rod 400 to pass through, and the upper valve cover 200 covers the first upper cavity 131. It can be understood that, because domestic gas-cooker generally is two ring fire, and commercial gas-cooker can be two ring fire or three ring fire, consequently the utility model discloses it is not right the quantity of gas outlet channel 120 is injectd, if the gas-cooker is two ring fire, gas outlet channel 120's quantity is two, if the gas-cooker is three ring fire, the quantity of gas outlet channel 120 is three, analogize with this.

As shown in fig. 5 to 7, the valve core 300 is rotatably connected in the first cavity 130, and because the inner wall of the first lower cavity 132 is an inverted conical surface, the outer wall of the valve core 300 is matched with the inner wall of the first lower cavity 132, that is, the outer diameter of the valve core 300 is sequentially increased from bottom to top, so that the space between the first lower cavity 132 and the first upper cavity 131 can be sealed by the valve core 300, and the gas is prevented from leaking from the first lower cavity 132 to the first upper cavity 131; the valve core 300 is provided with a second cavity 310, a limiting portion 311 with a circular through hole 301 is arranged in the second cavity 310, and the second cavity 310 is divided into an upper second cavity 312 and a lower second cavity 313 by the limiting portion 311. The gas inlet channel 110 is communicated with the second lower cavity 313, the valve core 300 is provided with a gas outlet 320 communicated with the gas outlet channel 120 at the position of the second lower cavity 313, the overlapping area between the gas outlet channel 120 and the gas outlet 320 of the valve core 300 is changed by rotating the valve core 300, so as to adjust the flow rate between the gas inlet channel 110 and the gas outlet channel 120, and at the moment, the gas in the valve body 100 flows through the second lower cavity 313, the gas outlet 320 and the gas outlet channel 120 in sequence from the gas inlet channel 110. It should be noted that, since the technical solution of adjusting the flow rate between the air inlet channel 110 and the air outlet channel 120 by rotating the valve core 300 is the prior art, the present invention does not describe in detail the arrangement of the air outlet channel 120 and the air outlet 320.

In addition, the valve rod 400 sequentially includes a pressing portion 410, a transition portion 420 and a rotation stopping portion 430 from top to bottom, specifically, the transition portion 420 and the rotation stopping portion 430 are both circular shafts, and the pressing portion 410 is cut off a part on the basis of the circular shafts, so that the pressing portion 410 is provided with an arc side surface 411 and a clearance side surface 412, and the clearance side surface 412 is a vertical plane; the pressing portion 410, the transition portion 420 and the rotation stop portion 430 have a common central axis of rotation, and the diameter of the rotation stop portion 430 and the nominal diameter of the pressing portion 410 are both greater than the diameter of the transition portion 420. The upper portion of the pressing part 410 is used to connect a knob (not shown in the drawings) mounted on the upper surface of the gas range so that a user can rotate the valve stem 400 by the knob. In order to enable the valve rod 400 to drive the valve core 300 to rotate, the rotation stopping portion 430 penetrates through the mounting hole 210 of the valve upper cover 200 from top to bottom and extends into the second upper cavity 312 of the valve core 300, the rotation stopping portion 430 is provided with two rotation stopping blocks extending outwards, the number of the rotation stopping blocks is two, one of the rotation stopping blocks is a long rotation stopping block 431, the other rotation stopping block is a short rotation stopping block 432, the valve core 300 is provided with two limiting grooves 330 matched with the rotation stopping blocks, the limiting grooves 330 extend downwards from top to bottom from the upper end face of the valve core 300, so that the valve rod 400 and the valve core 300 are in rotation stopping and vertically movable fit, at the moment, the long rotation stopping block 431 penetrates through the limiting grooves 330 and extends into the first upper cavity 131, and the short rotation stopping block 432 is located in the limiting grooves 330. It is understood that the number of the anti-rotation blocks may be one, three, etc., and the number of the limiting grooves 330 is the same as the number of the anti-rotation blocks, but the number of the long anti-rotation blocks 431 is only one no matter how many the number of the anti-rotation blocks is provided. In other embodiments, the transition portion 420 may not be provided, and the rotation stopper 430 may have a diameter smaller than the nominal diameter of the pressing portion 410.

As shown in fig. 5 and 6, in order to avoid the knob being triggered by mistake, the rotation of the valve rod 400 needs to be limited by child locking, for this reason, a child locking structure is arranged in the first upper cavity 131, the child locking structure includes a right-handed limiting block 710, a left-handed limiting block 720 and a terminal limiting block 730, the left-handed limiting block 720 is specifically arranged on the lower bottom surface of the valve upper cover 200, the right-handed limiting block 710 and the terminal limiting block 730 are both arranged in the valve main body 100, and the right-handed limiting block 710, the left-handed limiting block 720 and the terminal limiting block 730 are all intersected with the rotation path of the long stop block 431. As shown in fig. 8, the right-handed limiting block 710 and the end-point limiting block 730 are respectively disposed at opposite positions of the first upper cavity 131, and the maximum limiting depth of the right-handed limiting block 710 and the maximum limiting depth of the end-point limiting block 730 are both greater than the depth of the limiting groove 330, so that the long rotation stopper 431 can only perform limiting rotation in the space between the right-handed limiting block 710 and the end-point limiting block 730, that is, the knob has a rotation angle of about 180 °. As shown in fig. 9, a starting point space 701 capable of accommodating the long rotation stopper 431 is provided between the right rotation stopper 710 and the left rotation stopper 720, the maximum limiting depth of the left rotation stopper 720 is not greater than the depth of the limiting groove 330, and a user can press the valve rod 400 to make the long rotation stopper 431 separate from the limiting range of the left rotation stopper 720, so that the valve rod 400 can rotate in the counterclockwise direction. When the long rotation stopping block 431 is located in the starting point space 701, the inlet channel 110 and the outlet channel 120 are closed by the valve core 300, and the plug valve is in a closed state; when the long rotation stop block 431 is not located in the start point space 701, the inlet channel 110 and the outlet channel 120 are conducted through the valve core 300, and the plug valve is in an open state.

As shown in fig. 5 to 7, in order to reset the valve rod 400 upwards, a reset mechanism 800 is disposed between the rotation stopping portion 430 and the valve core 300, the reset mechanism 800 includes a valve rod 810 and a pre-pressing spring 820, the valve rod 810 passes through the circular through hole 301 of the limiting portion 311 from top to bottom and extends into the second lower cavity 313, the pre-pressing spring 820 is located in the second upper cavity 312, the pre-pressing spring 820 is sleeved outside the valve rod 810, a positioning block 811 extending outwards is disposed on the top surface of the valve rod 810, and the upper end of the pre-pressing spring 820 abuts against the positioning block 811; meanwhile, the bottom surface of the valve rod 400 is provided with a positioning hole 440, and the positioning block 811 is arranged in the positioning hole 440 in a matching manner, so that the valve rod 400 and the valve ejector pin 810 are prevented from being dislocated. In order to avoid that the fuel gas in the second lower cavity 313 leaks into the second upper cavity 312 through a gap between the valve ejector pin 810 and the circular through hole 301, the limiting part 311 is specifically a second-order limiting table, a sealing ring 910 sleeved outside the valve ejector pin 810 is placed on the lower step of the second-order limiting table, a gasket 920 sleeved outside the valve ejector pin 810 is placed on the upper step of the second-order limiting table (namely the inner bottom surface of the second upper cavity 312), the sealing ring 910 and the gasket 920 jointly form a sealing assembly 900, the pre-pressing spring 820, the gasket 920 and the sealing ring 910 are sequentially arranged from top to bottom, and at this time, the lower end of the pre-pressing spring 820 abuts against the gasket 920; even if the valve rod 400 is not pressed by an external force, the pre-pressing spring 820 has a certain pre-pressing elastic force between the gasket 920 and the positioning block 811, so that the pre-pressing spring 820 can provide a pre-pressing force to the gasket 920, so that the gasket 920 can continuously press the sealing ring 910 downwards to enhance the sealing effect of the sealing ring 910, and prevent the gas from leaking from the second lower cavity 313 to the second upper cavity 312. When the valve rod 400 is pressed downwards, the pre-pressing spring 820 starts to store energy, once the external force is removed, the pre-pressing spring 820 can provide elastic force to allow the valve post rod 810 to reset upwards, and the valve post rod 810 can drive the valve rod 400 to reset upwards together as the top of the valve post rod 810 is abutted against the bottom of the valve rod 400. Since the valve stem 810 moves up and down in the sealing ring 910, in order to reduce the friction between the valve stem 810 and the sealing ring 910 and to prolong the service life of the sealing ring 910, the valve stem 810 may be made of finish-machined copper, and since the plug valve has no strict requirement on the valve stem 400, the valve stem 400 may be made of rough-machined iron. In other embodiments, the valve stem 400 and the valve stem 810 are both integrally formed copper, wherein the portion of the valve stem 810 is finish machined, and the portion of the valve stem 400 is finish machined.

In order to control the opening of the electromagnetic valve 600, the electromagnetic valve 600 is provided with a trigger switch 610 right below the valve top bar 810, the trigger switch 610 is specifically positioned on the air inlet channel 110, and the distance between the trigger switch 610 and the valve top bar 810 is not greater than the depth of the limiting groove 330, so that the valve top bar 810 can be in contact with the trigger switch 610. When the valve top rod 810 is pressed and contacts with the touch switch 610, the electromagnetic valve 600 conducts the gas pipe with the gas inlet channel 110, and after the burner is ignited successfully, the thermocouple on the burner head of the burner is heated and controls the electromagnetic valve 600 to be kept open.

As shown in fig. 3 to 5, the microswitch 500 is mounted on the valve upper cover 200, and the initial position of the pressing portion 410 is located above the microswitch 500, that is, when the valve stem 400 is not subjected to an external force, the pressing portion 410 is always located above the microswitch 500. If the transition portion 420 is provided in the valve stem 400, the initial position of the rotation stop portion 430 is located below the microswitch 500; if the transition portion 420 is not provided in the valve stem 400, the initial position of the rotation stopper 430 is not limited. However, for the sake of further explanation, the present embodiment selects the valve stem 400 with the transition portion 420 as a specific embodiment, and the following conditions should be satisfied between the microswitch 500 and the valve stem 400: the rotational movement paths of the clearance side 412, the transition part 420 and the rotation stopping part 430 do not intersect with the microswitch 500, and the rotational movement path of the arc side 411 intersects with the microswitch 500, that is, no matter how the valve rod 400 moves, the clearance side 412, the transition part 420 and the rotation stopping part 430 do not contact with the microswitch 500, but the arc side 411 can contact with the microswitch 500. When the plug valve is in a closed state, the clearance side surface 412 of the pressing part 410 is opposite to the microswitch 500, and the rotational movement paths of the clearance side surface 412, the transition part 420 and the rotation stopping part 430 are not intersected with the microswitch 500, so that the microswitch 500 is not triggered at this time. When a user presses the valve rod 400 downwards, the pressing part 410 descends to a position below the contact height of the microswitch 500, and because the rotation moving path of the arc-shaped side surface 411 intersects with the microswitch 500, the arc-shaped side surface 411 gradually contacts with the microswitch 500 along with the gradual rotation of the valve rod 400, at the moment, the microswitch 500 is triggered, and the ignition needle electrically connected with the microswitch 500 starts to discharge; if the user removes the pressing force, the valve rod 400 is reset upwards under the driving of the reset mechanism 800, so that the pressing portion 410 is located above the microswitch 500 again, and since the rotation moving paths of the transition portion 420 and the rotation stopping portion 430 do not intersect with the microswitch 500, the microswitch 500 is not triggered at this time, and the ignition needle stops discharging immediately.

In some embodiments of the present invention, micro-gap switch 500 generally divide into contact formula micro-gap switch 500 or non-contact formula micro-gap switch 500, if the utility model discloses selected contact formula micro-gap switch 500, then preferably be equipped with contact stopper 220 on the valve upper cover 200, contact stopper 220 is used for restricting the amplitude of oscillation of contact piece 510 of contact formula micro-gap switch 500 for the position of contact piece 510 can be fixed, avoids leading to it and pressing the problem that the splenium 410 appears interfering because contact piece 510's excessive swing. If the utility model discloses selected non-contact formula inching switch 500, then need not to set up contact stopper 220.

As shown in fig. 9, in some embodiments of the present invention, in order to make the long stopper 431 rotate clockwise, it can return to the starting point space 701 without pressing, and for this purpose, the lower bottom surface of the left-handed stopper 720 is an inclined surface, and the inclined surface inclines downward toward the right-handed stopper 710. The arrangement is such that the left-hand stopper 720 only restricts the long stopper 431 rotating counterclockwise, and does not restrict the long stopper 431 rotating clockwise, so that the user can rotate the knob to the starting point.

Adopt above-mentioned structure, the work flow of plug valve is:

1. when the gas stove needs to be started, the valve rod 400 is pressed downwards, and at the moment, the long rotation stopping block 431 leaves the limiting range of the left rotation limiting block 720, so that the valve rod 400 can rotate in the anticlockwise direction; meanwhile, the valve top bar 810 is in contact with the trigger switch 610 of the solenoid valve 600, so that the gas channel is communicated with the gas inlet channel 110;

2. the valve core 300 rotates along with the rotation of the valve rod 400, the plug valve adjusts the flow rate between the gas inlet channel 110 and the gas outlet channel 120 by rotating the valve core 300, and at the moment, the gas outlet nozzle 121 of the plug valve injects gas to the burner of the burner; meanwhile, the arc side 411 of the pressing part 410 contacts with the microswitch 500, so that the ignition needle of the burner starts to discharge;

3. once the gas on the burner is ignited by the ignition needle, the thermocouple on the burner is heated and controls the electromagnetic valve 600 to keep open, then the user removes the pressing force on the plug valve, the valve rod 400 is driven by the reset mechanism 800 to reset upwards, so that the pressing part 410 is positioned above the microswitch 500 again, at this time, the microswitch 500 is not triggered, and the ignition needle stops discharging;

4. when the gas stove needs to be turned off, the knob is only required to be rotated clockwise to the starting point, the long rotation stopping block 431 is located in the starting point space 701 at the moment, the gas inlet channel 110 and the gas outlet channel 120 are closed through the valve core 300, and the burner stops burning immediately because no gas is delivered to the burner.

According to the utility model discloses a gas-cooker of second aspect embodiment, include according to the utility model discloses the plug valve of above-mentioned first aspect embodiment still includes the combustor, the combustor includes furnace end, ignition needle and thermocouple, the gas outlet nozzle 121 of plug valve with the furnace end of combustor is connected, the micro-gap switch 500 of plug valve with the ignition needle electric connection of combustor, the solenoid valve 600 of plug valve with the thermocouple electric connection of combustor. Since the gas stove adopts all technical schemes of all the embodiments, at least all the beneficial effects brought by the technical schemes of the embodiments are achieved, and detailed description is omitted.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A plug valve, comprising:

a valve upper cover connected to the valve main body;

2. The plug valve of claim 1, wherein: the valve core is provided with a second cavity, a limiting part with a circular through hole is arranged in the second cavity, and the limiting part divides the second cavity into an upper second cavity and a lower second cavity.

3. The plug valve of claim 2, wherein: reset mechanism includes valve ejector pin and pre-compaction spring, the top of valve ejector pin and the bottom butt of valve rod, the valve ejector pin down passes from last the circular through-hole of spacing portion and extend to it is internal that the second is gone up the cavity, the pre-compaction spring is located the second is gone up internally, the pre-compaction spring housing is established outside the valve ejector pin, the valve ejector pin passes through the pre-compaction spring upwards resets.

4. The plug valve of claim 3, wherein: the limiting part is provided with a sealing assembly, the sealing assembly is sleeved outside the valve ejector rod, the lower end of the pre-pressing spring is abutted to the sealing assembly, and the second upper cavity and the second lower cavity are sealed through the sealing assembly.

5. The plug valve of claim 3, wherein: the air inlet channel is provided with an electromagnetic valve, the electromagnetic valve is arranged under the valve ejector rod, and the distance between the touch switch and the valve ejector rod is not greater than the depth of the limiting groove.

6. The plug valve of claim 2, wherein: the inner wall of the first lower cavity is an inverted conical surface, and the outer wall of the valve core is matched with the inner wall of the first lower cavity; and the valve core is provided with an air outlet communicated with the air outlet channel at the position of the second lower cavity.

7. The plug valve of claim 1, wherein: the levogyration stopper is established the lower bottom surface of valve upper cover, the dextrorotation stopper with the terminal point stopper is all established in the valve main part.

8. The plug valve of claim 7, wherein: the lower bottom surface of the levogyration stopper is an inclined plane, and the inclined plane inclines downwards towards the direction of the dextrorotation stopper.

9. The plug valve of claim 1, wherein: the microswitch is provided with a contact piece, and the valve upper cover is provided with a contact piece limiting block used for limiting the contact piece.

10. Gas burner, characterized in that it comprises a plug valve according to any one of claims 1 to 9, further comprising: the combustor, the combustor includes furnace end and ignition needle, the plug valve is equipped with at least two air outlet channel, every air outlet channel all is connected with the nozzle of giving vent to anger, all air outlet nozzle all with the furnace end is connected, micro-gap switch with ignition needle electric connection.