CN109237064B - gas plug valve - Google Patents

Abstract

The invention discloses a gas plug valve which comprises a valve body (1), a valve needle (7), a deflector rod (8) and an electromagnetic valve (6) arranged in an air inlet passage of the valve body, wherein the valve needle is vertically arranged in a valve cavity (3), one end of the deflector rod is provided with a first deflector plate (81) which is in butt joint transmission with the bottom end of the valve needle, the other end of the deflector rod is provided with a second deflector plate (82) for triggering the electromagnetic valve, the electromagnetic valve comprises a sealing plug (61) for sealing an air inlet of the electromagnetic valve, the front end of the sealing plug is provided with a middle transmission rod (9) which coaxially stretches out, and when the valve needle presses down the first deflector plate, the second deflector plate drives the middle transmission rod to push the sealing plug to open. Therefore, in the gas plug valve, the intermediate transmission rod is additionally arranged at the gas inlet of the electromagnetic valve, so that the structure of the deflector rod can be correspondingly optimized, the opening area for installing the deflector rod can be reduced, the installation of the deflector rod is facilitated, and the sealing property of the valve cavity of the whole valve body is improved.

Description

Gas plug valve

Technical Field

The invention relates to the field of household kitchen appliances, in particular to a gas plug valve.

Background

In daily kitchen ranges, a gas plug valve is a valve body for manually adjusting and controlling gas on-off and adjusting gas size, and generally comprises a valve body, a valve core, a valve rod, a micro switch, a solenoid valve and other additional devices. The main working principle of the gas plug valve is as follows: the gas enters through the gas inlet of the valve body, sequentially passes through the electromagnetic valve, then enters the valve core, and finally is communicated with the side opening of the gas outlet pipe through the side opening of the valve core, so that the gas supply of the gas stove is realized, and the gas control process is a complex gas control process.

In the current common gas plug valve, the overall structure of the plug valve is complex, the functional components and parts are contained, and the matching relation among the functional components is complex and compact. Because the number of parts is high, the sealing joint surfaces among the parts are high, and the risk of air leakage is high.

The valve body of the conventional gas plug valve is provided with a valve seat, and a micro switch for igniting the plug valve, a micro switch fixing plate (or called a micro switch connecting plate) for fixing the micro switch, and an opening check ring and a positioning block for fixing and connecting a micro switch pressing plate are arranged below the valve seat. One end of the micro switch pressing plate is arranged below the positioning block, the other end of the micro switch pressing plate is arranged above the trigger button of the micro switch, when the valve rod is pressed down, the valve seat spring positioned below the micro switch pressing plate and the positioning block is compressed, and the micro switch pressing plate is driven to press the trigger button of the micro switch to trigger and start the micro switch, so that the structure relationship is complex.

In addition, a valve needle extending into the valve core is arranged below the valve rod. When the valve rod is pressed down, the valve needle can be driven to move downwards to abut against a deflector rod capable of triggering the electromagnetic valve to open, a first deflector piece at one end of the deflector rod abuts against the bottom end of the valve needle, and a second deflector piece at the other end abuts against a sealing plug of the electromagnetic valve. The second shifting piece extrudes the sealing plug to move to open the electromagnetic valve, and meanwhile, the air inlet of the electromagnetic valve can be opened to enable fuel gas to enter the electromagnetic valve, so that the air passage can be further conducted through the channel of the electromagnetic valve. For this reason, the conventional second pulling piece is usually a pulling piece with a right angle hook shape, and the hook-shaped end portion needs to be extended into the electromagnetic valve, so that the whole pulling rod structure is complex, and the required installation space is large. In this way, in the existing structure, the bottom of the valve body is provided with the sealing cover structure of the rear cover, when the deflector rod is installed in the valve cavity, the rear cover is sealed on the valve cavity at the bottom of the valve body, and meanwhile, a fastener and a sealing piece are required to be arranged to ensure the fixing function of the rear cover and the sealing performance of the valve cavity.

Disclosure of Invention

The invention aims to provide a gas plug valve which is simpler in structure and better in sealing performance.

In order to achieve the above purpose, the invention provides a gas plug valve, which comprises a valve body, a valve needle, a deflector rod and an electromagnetic valve arranged in an air inlet passage of the valve body, wherein the valve needle is vertically arranged in a valve cavity, one end of the deflector rod is provided with a first deflector plate which is in butt joint transmission with the bottom end of the valve needle, the other end of the deflector rod is provided with a second deflector plate which is used for triggering the electromagnetic valve, the electromagnetic valve comprises a sealing plug for sealing an air inlet of the electromagnetic valve, the front end of the sealing plug is provided with a middle transmission rod which coaxially stretches out, and when the valve needle is pressed down on the first deflector plate, the second deflector plate is used for poking the middle transmission rod to push and open the sealing plug.

Preferably, the middle transmission rod is a plastic piece or a silica gel piece.

Preferably, the intermediate transmission rod comprises a plurality of outer fins which are radially outwards dispersed from the center and are circumferentially arranged at intervals, the number of the outer fins is not less than 3, and an overcurrent air gap is formed between every two adjacent outer fins.

Preferably, the cross section of the middle transmission rod is a triangle star, a quadrangle star or a five-pointed star.

Preferably, the intermediate transmission rod is arranged at a distance from the sealing plug.

Preferably, the length of the intermediate transmission rod is 4 mm-8 mm.

Preferably, the length of the second pulling piece is not greater than the length of the first pulling piece.

Preferably, the valve body is an integrated part, a deflector rod mounting hole which transversely penetrates to the lower part of the valve needle and is communicated with the valve cavity is formed in the outer peripheral wall of the bottom of the valve body, and the deflector rod is embedded and mounted in the deflector rod mounting hole.

Preferably, a blocking head is arranged at a through inlet of the deflector rod mounting hole on the outer peripheral wall of the bottom of the valve body.

Preferably, the plugging head and the deflector rod mounting hole are provided with mutually matched fastening threads.

According to the technical scheme, in the gas plug valve, the intermediate transmission rod is additionally arranged at the air inlet of the electromagnetic valve, so that the structure of the shifting rod can be correspondingly optimized, and particularly, the structure of the second shifting piece of the shifting rod, which is used for connecting with the sealing plug at one end of the air inlet of the electromagnetic valve, is optimized, namely, the hook-shaped shifting piece extending into one end of the air inlet of the electromagnetic valve on the second shifting piece is canceled, and the shifting rod of the scheme is further obtained. Therefore, the opening area for installing the deflector rod can be reduced, the deflector rod is facilitated to be installed, and the sealing performance of the valve cavity of the whole valve body is improved.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:

FIG. 1 is a perspective view of a prior art gas plug valve having a rear cover, with portions of the structure not shown for clarity;

FIG. 2 is an exploded view of the assembly of FIG. 1;

fig. 3 is a perspective view of a gas plug valve according to a first preferred embodiment of the present invention;

FIG. 4 is an exploded view of FIG. 3;

FIG. 5 is a perspective view of an intermediate drive rod;

FIG. 6 is a top view of FIG. 3;

FIG. 7 is a top view of FIG. 3;

FIG. 8 is a cross-sectional view taken along section A-A in FIG. 7;

FIG. 9 is an enlarged partial view of section I of FIG. 8;

FIGS. 10 and 11 are perspective views of a valve seat according to a first preferred embodiment of the present invention;

FIGS. 12 and 13 are perspective views of a valve seat according to a second preferred embodiment of the present invention;

FIG. 14 is a perspective view of a valve seat according to a third preferred embodiment of the present invention;

fig. 15 and 16 are perspective views of a gas plug valve according to a second preferred embodiment of the present invention;

FIG. 17 is a perspective view of the micro-switch of FIGS. 14 and 15 with a novel micro-switch pressure plate; and

fig. 18 is an exploded view of a micro-switch with a grounding terminal connected to a metal grounding plate.

Description of the reference numerals

1. Valve seat of valve body 2

3. Valve cavity 4 valve rod

5. Micro-switch 6 electromagnetic valve

7. Valve needle 8 deflector rod

9. Middle transmission rod 10 plugging head

11. Rear cover of deflector rod mounting hole 12

13. Sealing ring 14 fastener

21. Valve rod via hole 22 guide sleeve

23. Mounting bracket for micro-switch with lateral opening 24

241. Positioning groove 41 linkage clamping groove

42. Valve stem outer section 43 valve stem inner section

44. Linkage groove

411. Top surface 412 of linkage clamping groove and outer peripheral surface of valve rod

413. Transition fillet 51 trigger button

52. Grounding end of microswitch pressing plate 53

54. Metal grounding plate

521. Cantilever extension 522 connection section

523. Oblique pressing plate section

81. First plectrum 82 second plectrum

91. Outer fin 92 overcurrent air gap

Length of L intermediate transmission rod

Detailed Description

The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.

In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the positional relationship of the various components with respect to one another in the vertical, vertical or gravitational directions.

Aiming at the problems that in the existing gas plug valve, the linkage relation of a microswitch is complex, parts are more and the like, the invention provides a novel gas plug valve.

Referring to fig. 3, 7, 8 and 9, in the gas plug valve of the first preferred embodiment of the present invention, the gas plug valve includes a valve body 1, a valve seat 2, a valve stem 4 extending into a valve cavity 3 below the valve seat 2, and a micro switch 5, the micro switch 5 is mounted on the valve seat 2, a linkage clamping groove 41 located outside the valve seat 2 is provided on an outer peripheral wall of the valve stem 4, and a trigger button 51 of the micro switch 5 extends into the linkage clamping groove 41 and is pressed to trigger during the pressing down of the valve stem 4.

In the gas plug valve, as the micro switch 5 is moved up to the valve seat 2, and the micro switch 5 is directly in linkage with the valve rod 2, the structure of the gas plug valve is effectively optimized and simplified, at least 5 parts such as a split washer, a positioning hole, a micro clamping pipe pressing plate, a valve rod spring, a micro switch fixing plate and the like in the existing gas plug valve are eliminated, the number of parts is greatly reduced, the production cost is reduced, and the assembly property, the use reliability and the like of products are improved.

Meanwhile, the linkage clamping groove 41 on the valve rod 4 is arranged outside the valve seat 2, so that the micro switch 5, particularly the trigger button 51 extending into the linkage clamping groove 41, can be directly exposed, and further the problems of rust and aging of the micro switch 5, even poor ignition and the like caused by the fact that sundries such as soup and the like falling along the valve rod 4 are accumulated near a contact between the trigger button 51 and the valve rod 4 can be reduced, and the reliability and the service performance of products are further improved.

When the manufacturing accuracy of the valve rod 4 is deviated or the valve rod 4 is easy to shake after long-time use, the pressing surface of the linkage clamping groove 41 is difficult to contact with the trigger button 51 of the micro switch 5 in the process of pressing the valve rod 4, or after the valve rod 4 is pressed, the pressing surface of the valve rod 4 always presses the trigger button 51, so that the micro switch 5 is in a bad state of ignition or normal ignition. This can be solved by changing the contact surface of the trigger button 51, but the micro switch 5 is generally used as a standard, and needs to be opened and redesigned once its shape is changed, thereby spending a certain cost, resulting in cost waste. For this purpose, in particular, in the gas plug valve of the present invention, referring to fig. 8 and 9, the interlocking groove 41 is preferably an annular groove, the top surface 411 of the interlocking groove 41 is an annular flat surface and a transition rounded corner 413 is formed between the top surface 411 and the outer peripheral surface 412 of the valve stem 4, and the transition rounded corner is formed as a pressing surface for pressing the trigger button 51. The shape of the linkage slot 41 is optimized to match the shape of the trigger button 51 which can be used as a standard component, so that the product reliability of the micro switch 5 is effectively improved, and the production cost of the product is saved.

Further, as shown in fig. 9 and 18, the transition rounded surface of the interlocking groove 41 and the trigger button 51 having a beveled surface may be formed in line contact. Thus, compared with the linkage clamping groove 41 with an inclined plane or other planes and the trigger button 51 to form surface contact, the scheme adopts line contact to press more labor-saving than surface contact to press in the process of pressing the valve rod 4 to trigger the micro switch 5, and the pressing is faster and more effective.

Therefore, in the gas plug valve of the invention, the micro switch 5 and the trigger button 51 can be standard components, so that the micro switch 5 and the trigger button 51 have higher universality and lower cost.

Still further, in the interlocking groove 41 of the valve stem 4, the fillet radius of the transition fillet 413 is not less than 0.5mm, so that the valve stem 4 can be better contacted and interacted with the trigger button 51.

Wherein, in order to locate the linkage catch groove 41 on the valve rod 4 outside the valve seat 2, the valve seat 2 of the first preferred embodiment of the present invention is shown in fig. 10 and 11 in combination with the gas plug valve of fig. 3 and 4, the valve seat 2 is provided with a valve rod through hole 21 and a guide sleeve 22, the guide sleeve 22 is arranged around the valve rod through hole 21 and extends upwards from the top surface of the valve seat 2, the peripheral wall of the guide sleeve 22 is provided with a lateral opening 23 facing one side of the micro switch 5, and the trigger button 51 extends into the linkage catch groove 41 through the lateral opening 23 of the guide sleeve 22. In the gas plug valve of the present invention, therefore, the micro switch 5 is disposed above the valve seat 2, and the valve seat 2 has the guide sleeve 22 of the lateral opening 23, and the guide sleeve 22 can be protruded upward to be held on the valve stem 4, so that the contact area between the valve stem 4 and the guide sleeve 22 is larger, thereby further preventing the valve stem 4 from shaking. In addition, compared with the valve seat 2 provided with the guide sleeve 22 with the lateral mounting hole drilled in a normal machining mode, the lateral opening 23 of the valve seat 2 can be integrally cast with the valve seat 2, so that the machining is more convenient, the process of drilling is reduced, and the cost saving effect is achieved.

To ensure an effective retaining height of the guide sleeve 22, the axial height range of the guide sleeve 22 is not less than 8mm.

And, the width gap between the outer wall of the trigger button 51 and the side wall of the lateral opening 23 is not less than 1mm. Thus, the lateral opening 23 is arranged to be large enough to ensure that the installation gap of the lateral opening 23 is large enough after the trigger button 51 stretches into the linkage clamping groove 41, so that dirt collection and scale collection phenomenon can not occur, the trigger button 51 is further subjected to dirt prevention and rust prevention, and the usability of the micro switch 5 is effectively ensured.

Preferably, the lateral opening 23 is a U-shaped opening extending downwardly from the top edge of the guide sleeve 22, so that the lateral opening 23 can be a drawn die opening integrally cast with the valve seat 2.

Referring to the valve seat 2 of the second preferred embodiment of the present invention of fig. 12 and 13, and as shown in connection with the gas plug valves of fig. 3 and 4, the valve seat 2 is provided with a valve stem via 21 and a guide sleeve 22, the guide sleeve 22 being disposed around the valve stem via 21 and extending upwardly from the top surface of the valve seat 2, and a linkage catch 41 being located above the guide sleeve 22. Wherein the micro-switch 5 is arranged above the valve seat 2, and the linkage clamping groove 41 and the trigger button 51 are both positioned above the guide sleeve 22. The scheme is particularly suitable for the gas plug valve with high dimensional accuracy and difficult shaking of the valve rod 4, so that the size of the guide sleeve 22 is shortened, the use of materials is reduced, and the effect of reducing the cost is achieved. Moreover, when the size of the guide sleeve 22 is short enough, the guide sleeve 22 can be omitted, and the valve seat 2 of the third preferred embodiment of the present invention, which is shown in fig. 14, is also included in the protection scope of the present invention.

As shown in fig. 10 to 14, the top end surface of the valve seat 2 may be provided with a micro-switch mounting bracket 24, and the micro-switch mounting bracket 24 is provided with a positioning slot 241 for mounting the micro-switch 5, so that the mounting effect of the micro-switch 4 is more stable.

As shown in fig. 16 and 17, in the gas plug valve of the second preferred embodiment of the present invention, the gas plug valve includes a valve body 1, a valve stem 4, and a micro switch 5, the micro switch 5 includes a trigger button 51 and a micro switch pressing plate 52, a linkage groove 44 is provided on an outer peripheral wall of the valve stem 4, an end of the micro switch pressing plate 52 protrudes into the linkage groove 44, and the valve stem 4 presses down an end of the micro switch pressing plate 52 to press the trigger button 51 by the micro switch pressing plate 52.

Therefore, in the scheme, the micro switch 5 and the valve rod 2 can be directly linked through the modified micro switch pressing plate 52, namely, the micro switch pressing plate 52 extends into the linkage groove 44 on the peripheral wall of the valve rod 4, so that the structure of the gas plug valve is simpler and more reliable. In addition, the shape of the micro switch pressing plate 52 of the micro switch 5 is mainly changed, so that the main body of the micro switch 5 still adopts standard components through optimization, the micro switch pressing plate 52 is only required to be changed without additional die opening, and the universality is high. Meanwhile, the trigger button 51 of the micro switch 5 is pressed by the micro switch pressing plate 52, so that hard contact between the valve rod 2 and the trigger button 51 can be avoided, the micro switch 5 is protected, and the service life of the micro switch 5 is prolonged.

Wherein, valve body 1 includes disk seat 2 of closing cap in valve body 1 top, and micro-gap switch 5 installs on disk seat 2, and valve rod 4 includes the valve rod inner section 43 that stretches into valve pocket 3 and is located the valve rod outer section 42 of disk seat 2 top, and the link groove 44 sets up on valve rod outer section 42. Therefore, in the scheme, at least 5 parts of the split ring, the positioning hole, the micro-motion clamping pipe pressing plate, the valve rod spring and the micro-motion switch fixing plate in the existing gas plug valve can be canceled, the use quantity of the parts is reduced, the production cost is reduced,

also, the valve seat 2 is provided with a valve stem via hole 21 and a guide sleeve 22 (see fig. 12, 13 and 14 and fig. 15 and 16), the guide sleeve 22 is provided around the valve stem via hole 21 and extends upward from the top surface of the valve seat 2, and the interlocking groove 44 is located above the guide sleeve 22. Therefore, the micro switch 5 is particularly suitable for being mounted on the valve seat 2 in an upward moving manner under the condition that the plug valve precision is good, namely the shaking amount of the valve rod 4 is small enough, the length of the guide sleeve 22 can be effectively shortened, and the advantages of saving materials and reducing cost are achieved.

Likewise, the axial height of the guide sleeve 22 is no greater than 10mm. In addition, in the case where the plug valve has sufficient accuracy, the guide sleeve 22 on the valve seat 2 may be omitted, as shown in fig. 14.

In addition, referring to fig. 10 and 11 and fig. 15 and 16, the valve seat 2 is provided with a valve stem via hole 21 and a guide sleeve 22, the guide sleeve 22 is provided around the valve stem via hole 21 and extends upward from the top surface of the valve seat 2, the outer peripheral wall of the guide sleeve 22 is provided with a lateral opening 23 toward the side of the micro switch 5, and the micro switch presser plate 52 passes through the lateral opening 23 of the guide sleeve 22 and protrudes into the linking groove 44. By lengthening the extension length of the guide sleeve 22, the valve rod 4 can be effectively protected, and the shaking phenomenon of the valve rod 4 can be reduced and prevented.

In this regard, as well, the axial height of the guide sleeve 22 is not less than 8mm.

As shown in fig. 17, the micro-switch pressing plate 52 may include an oblique pressing plate section 523 for pressing the trigger button 51, a cantilever extending section 521 extending horizontally into the linkage groove 44, and a connecting section 522 connecting the oblique pressing plate section 523 and the cantilever extending section 521, wherein one end of the oblique pressing plate section 523 is fixed on the micro-switch 5. In this way, one end of the micro switch pressing plate 52 is pressed against the trigger button 51, and the other end extends into the linkage groove 44, so that the micro switch pressing plate 52 can be driven to press down to trigger the micro switch 5 to be turned on when the valve rod 4 is pressed.

Preferably, the micro switch pressing plate 52 is a bent long elastic metal pressing plate, so that after the micro switch pressing plate 52 is deformed, the micro switch pressing plate 52 can be restored in time, particularly when the micro switch pressing plate 52 is deformed, one end of the inclined pressing plate section 523 can rebound above the trigger button 51 in time, so as to avoid the trigger button 51 being in a normal ignition state, so that the next pressing ignition is performed.

In order to ensure that the micro-switch pressing plate 52 can extend into the linkage groove 44 and can move along with the up-and-down movement of the linkage groove 44, the linkage groove 44 is a groove with a groove depth of not less than 1mm, so as to ensure a sufficient contact surface between the micro-switch pressing plate 52 and the linkage groove 44.

Referring to fig. 18, in the gas plug valve of the present invention, the grounding terminal 53 is provided on the micro switch 5, and the grounding terminal 53 is connected with the metal grounding piece 54 which is connected to the valve body 1 from the grounding terminal 53, so that the grounding wire led out from the grounding terminal 53 of the micro switch 5 is omitted, the cost is saved, and the assembly of the micro switch 5 is also facilitated.

In addition, as shown in fig. 1 and 2, the structure of the deflector rod 8 in the valve body 1 is complex and the occupied space is large, so that the installation opening of the deflector rod 8 is large, and correspondingly, the bottom of the valve body 1 is provided with a rear cover 12 for sealing the bottom valve cavity 3, a plurality of fasteners 14 for fixing the rear cover 12 on the valve body 1 and a sealing ring 13 for sealing. Referring to fig. 3, 4 and 6, the gas plug valve comprises a valve body 1, a valve needle 7, a deflector rod 8 and an electromagnetic valve 6 arranged in an air inlet passage of the valve body, wherein the valve needle 7 is vertically arranged in a valve cavity 3, one end of the deflector rod 8 is provided with a first deflector plate 81 in butt transmission with the bottom end of the valve needle 7, the other end of the deflector rod 8 is provided with a second deflector plate 82 for triggering the electromagnetic valve 6, the electromagnetic valve 6 comprises a sealing plug 61 for sealing an air inlet of the electromagnetic valve, the front end of the sealing plug 61 is provided with an intermediate transmission rod 9 which coaxially stretches out, and when the valve needle 7 presses down the first deflector plate 81, the second deflector plate 82 drives the intermediate transmission rod 9 to push and open the sealing plug 61.

It can be seen that, in the gas plug valve of the present invention, since the intermediate transmission rod 9 is added at the gas inlet of the solenoid valve, the structure of the deflector rod 8 can be correspondingly optimized, especially the structure of the second deflector piece 82 of the deflector rod 8 for connecting with the sealing plug 61 at one end of the gas inlet of the solenoid valve is optimized, that is, the hook-shaped deflector piece extending into one end of the gas inlet of the solenoid valve on the second deflector piece 82 is eliminated, so as to obtain the deflector rod 8 as shown in fig. 4 in this scheme. Thus, the opening area for installing the deflector rod 8 can be reduced, the deflector rod 8 can be installed conveniently, and the tightness of the valve cavity 3 of the whole valve body 1 is improved.

The intermediate transmission rod 9 is preferably a plastic part or a silicone part. In this way, a transmission structure with elasticity or wear resistance is additionally arranged in the transmission relation between the deflector rod 8 and the electromagnetic valve 6. Therefore, on one hand, the phenomenon that metal scraps fall off after long-term friction between the deflector rod 8 (the second deflector piece 82) and the electromagnetic valve 6 (the sealing plug 61) which are made of metal materials, so that air leakage occurs at one end of the air inlet of the electromagnetic valve 6 can be prevented, on the other hand, the hard contact between the deflector rod 8 and the electromagnetic valve 6 is avoided, the electromagnetic valve 6 is protected, and the service life of the electromagnetic valve 6 is prolonged.

Referring to fig. 5, the intermediate transmission rod 9 includes a plurality of outer fins 91 radially outwardly diverged from the center and arranged at intervals in the circumferential direction, the number of the outer fins 91 being not less than 3, and an excessive air gap 92 being formed between adjacent outer fins 91. The purpose of this is to leave a gap in the air inlet of the solenoid valve 6 to allow the gas passage between the valve chamber 3 and the solenoid valve 6 to be opened when the second paddle 82 of the lever 8 toggles the intermediate transmission lever 9 and pushes the sealing plug 61 open.

Of course, the shape of the intermediate transmission rod 9 may be varied, and it is preferable that the cross section of the intermediate transmission rod 9 is a triangle star (as shown in fig. 5), a quadrangle star or a pentagon star.

The middle transmission rod 9 and the sealing plug 61 are arranged at intervals, that is, the middle transmission rod 9 is independently arranged in the valve cavity 3, and the installation mode of the middle transmission rod 9 can be that the middle transmission rod is simply placed in the valve cavity 3 of the valve body 1, or the end part of the middle transmission rod 9 is adhered and fixed on the sealing plug 61, so that the installation steps of parts are reduced, and the production efficiency is improved.

And the length L of the intermediate transmission rod 9 may preferably range in size from 4mm to 8mm depending on the installation space of the actual valve chamber 3 and the size of the valve body 1.

In the optimized lever 8, the length of the second paddle 82 may be not greater than the length of the first paddle 81.

In particular, the valve body 1 may be preferably an integrally formed member, and a lever mounting hole 11 penetrating transversely below the valve needle 7 and communicating with the valve cavity 3 is provided in the bottom peripheral wall of the valve body 1, and the lever 8 is fitted into the lever mounting hole 11. Wherein the deflector rod mounting hole 11 extends from the bottom peripheral wall of the valve body 1 into the valve cavity 3, i.e., in the gas plug valve of the present invention, the rear cover 12 of the lower portion of the valve body 1 is integrated with the valve body 1, i.e., the rear cover 12 and the mating sealing ring 13 and two fasteners 14 for fixing the rear cover 12 are omitted, see fig. 1 and 2. The improvement can reduce one sealing surface, thereby reducing the risk of air leakage of the plug valve, having simpler structure, improving the stability of the valve body and having better sealing performance.

Meanwhile, a blocking head 10 is provided at a through entrance of the deflector rod installation hole 11 on the bottom peripheral wall of the valve body 1.

And, the plugging head 10 and the deflector rod mounting hole 11 are provided with mutually matched fastening threads. The plug 10 and the valve body 1 are detachably installed, the plug and the valve body are connected in a threaded mode, and when assembly errors exist in the plug, for example, when the installation direction of the deflector rod 8 is wrong, the plug can be removed and reinstalled, so that the feasibility is higher, and the design is simpler and more reasonable.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.

In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition.

Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.

Claims (9)

1. The utility model provides a gas plug valve, includes valve body (1), needle (7), driving lever (8) and sets up solenoid valve (6) in the valve body gas inlet circuit, the vertical setting of needle (7) is in valve pocket (3), its characterized in that, the one end of driving lever (8) be equipped with the driven first plectrum (81) of bottom butt of needle (7), the other end of driving lever (8) is equipped with and is used for triggering second plectrum (82) of solenoid valve (6), solenoid valve (6) are including shutoff sealing plug (61) of solenoid valve air inlet, the front end of sealing plug (61) is equipped with middle transfer line (9) of coaxial extension, when needle (7) are pushed down first plectrum (81), second plectrum (82) stir middle transfer line (9) are in order to promote and open sealing plug (61), middle transfer line (9) are plastic part or silica gel piece, middle transfer line (9) include radially outwards and along a plurality of outer fins (91) of circumference interval arrangement from the center.

2. The gas plug valve according to claim 1, wherein the number of the outer fins (91) is not less than 3, and an excess flow air gap (92) is formed between adjacent outer fins (91).

3. A gas plug valve according to claim 2, characterized in that the cross section of the intermediate transmission rod (9) is a triangle star, a quadrangle star or a pentagon star.

4. A gas plug valve according to claim 1, in which the intermediate transmission rod (9) is arranged spaced from the sealing plug (61).

5. The gas plug valve according to claim 1, characterized in that the length (L) of the intermediate transmission rod (9) is 4 mm-8 mm.

6. The gas plug valve according to claim 1, wherein the length of the second paddle (82) is not greater than the length of the first paddle (81).

7. The gas plug valve according to claim 6, wherein the valve body (1) is an integrally formed piece, a deflector rod mounting hole (11) which transversely penetrates below the valve needle (7) and is communicated with the valve cavity (3) is formed in the outer peripheral wall of the bottom of the valve body (1), and the deflector rod (8) is embedded and mounted in the deflector rod mounting hole (11).

8. The gas plug valve according to claim 7, wherein a through inlet of the lever mounting hole (11) on a bottom peripheral wall of the valve body (1) is provided with a blocking head (10).

9. The gas plug valve according to claim 8, wherein the plug head (10) and the deflector rod mounting hole (11) are provided with mutually matched fastening threads.