CN215861829U - Plug valve switch and plug valve - Google Patents

Abstract

A plug valve switch comprises a valve rod and a switch shell, wherein a coaxial slide way is arranged in the switch shell, the valve rod penetrates through the switch shell from the slide way, and the valve rod is in sliding fit with the inner wall of the switch shell; the valve rod is provided with two circles of grooves, gear grooves and sliding grooves which are sunken on the peripheral wall at the position of penetrating through the switch shell; one side of the switch shell is provided with a through hole which radially penetrates through the circumferential wall of the switch shell, a steel ball which is supported by a spring and has the same diameter as the inner diameter of the through hole is arranged in the through hole, part of the steel ball is exposed out of the inner wall of the switch shell, and the exposed part of the steel ball is clamped in the gear groove or the sliding groove. According to the plug valve, the valve rod is simultaneously provided with the gear groove and the sliding groove, so that a user can axially pull the valve rod to enable the corresponding position of the steel ball to be switched between the gear groove and the sliding groove, different requirements of the user on adjusting hand feeling of the plug valve are met, and the using effect of the user is improved.

Description

Plug valve switch and plug valve

Technical Field

The utility model relates to the field of gas stove valve manufacturing, in particular to a plug valve switch.

Background

The adjustment of the magnitude of the fire of a gas cooker has been a problem of great concern to users. The gas plug valve for gas appliance generally includes a valve body with gas inlet channel and gas outlet channel, a valve core in the valve body and a valve rod connected to the valve core.

When the gas valve is used, the knob can be operated to control the knob rod, generally, the knob is pressed and rotated anticlockwise, the valve core can be driven to rotate anticlockwise, the fire hole in the valve core is communicated with the gas inlet channel in the valve body, and a gas source can be sprayed out from the nozzle through the gas inlet channel and the gas outlet channel to be used by a gas appliance. The rotation of the knob switch is transmitted to the valve core through the valve rod, the gas output of the gas is directly controlled by the rotation angle of the valve rod, namely, the rotation angle of the valve rod is directly related to the gear of the gas stove.

The traditional mode has no limit on the rotation angle, the knob does not have any mechanical hand feeling change when rotating to the position, the hand feeling of the knob driving the valve rod to rotate is poor, and no hand feeling or sound indicates whether the valve rod rotates to the position; plug valves with a position switch have also appeared on the market in recent years.

However, when a user uses the cooker to complete different cooking operations, or different users often need different adjusting handfeels and adjusting modes when using the same cooker, the existing gas plug valve with a single adjusting mode cannot meet the diversified using requirements of people.

Therefore, designing a plug valve that can be switched in an adjusting manner in real time according to the user's needs in the using process becomes a technical problem to be solved urgently by those skilled in the art.

In view of the above, the present invention is particularly proposed.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a plug valve switch, so that the plug valve can be switched between gear adjustment and non-gear adjustment, the requirements of users on different use handfeels are met, and the use effect of the users is improved.

In order to solve the technical problems, the utility model adopts the technical scheme that:

a plug valve switch comprises a valve rod and a switch shell, wherein a coaxial slide way is arranged in the switch shell, the valve rod penetrates through the switch shell from the slide way, and the valve rod is in sliding fit with the inner wall of the switch shell; the valve rod is provided with two circles of grooves, gear grooves and sliding grooves which are sunken on the peripheral wall at the position of penetrating through the switch shell;

one side of the switch shell is provided with a through hole which radially penetrates through the circumferential wall of the switch shell, a steel ball which is supported by a spring and has the same diameter as the inner diameter of the through hole is arranged in the through hole, part of the steel ball is exposed out of the inner wall of the switch shell, and the exposed part of the steel ball is clamped in the gear groove or the sliding groove.

Furthermore, the inner diameter of one end of the through hole close to the center of the switch shell is smaller than the diameter of the steel ball;

preferably, the inner diameter of the through hole near the center of the switch shell is gradually reduced from outside to inside.

Furthermore, the gear groove is supported against the steel balls, the bottom of the gear groove is provided with a plurality of grooves matched with the steel balls, the grooves are uniformly arranged along the circumferential direction of the valve rod, and the shape of the grooves is matched with the exposed parts of the steel balls;

preferably, the width of the gear groove is the same as the inner diameter of one end of the through hole close to the center of the switch shell.

Furthermore, the groove wall of the sliding groove close to one side of the gear groove is set to be an arc surface facing the direction of the gear groove.

Furthermore, a microswitch is arranged on one side of the switch shell, and the inner wall of the switch shell is exposed out of the microswitch part;

the valve rod is provided with a pressure groove along the circumferential direction of the valve rod, the pressure groove is matched with the micro switch, and the pressure groove is arranged on one side far away from the sliding groove.

Furthermore, the sliding groove axially extends towards one side far away from the pressing groove, and the steel ball is abutted against one end, close to the pressing groove, in the sliding groove.

Further, the valve rod comprises an upper valve rod and a lower valve rod, and the gear groove and the sliding groove are formed in the upper valve rod;

one side of the upper valve rod close to the gear groove is abutted with a lower valve rod, the lower valve rod is provided with a pressing groove, and the upper valve rod and the lower valve rod are circumferentially positioned.

Further, the switch shell comprises a first part and a second part which are coaxial, the first part and the second part are integrally formed, the upper valve rod is matched with the first part, and the lower valve rod is matched with the second part;

one end of the upper valve rod, which is close to the lower valve rod, is provided with a radial bulge matched with the second part, and the upper valve rod is abutted against the lower valve rod through the radial bulge.

Further, the axial distance between the center of the steel ball and the center of the groove is equal to the distance between the end face, away from the lower valve rod, of the radial protrusion and the first part.

The utility model further aims to provide a plug valve, which comprises a valve body and a valve core, wherein any one plug valve switch is arranged on the valve body, and the valve rod and the valve core are circumferentially positioned.

After adopting the technical scheme, compared with the prior art, the utility model has the following beneficial effects:

the utility model discloses a plug valve switch which comprises a valve rod, wherein a gear groove and a sliding groove are formed in the valve rod simultaneously, so that a user can switch the corresponding position of a steel ball between the gear groove and the sliding groove by axially drawing the valve rod, different requirements of the user on adjusting hand feeling of the plug valve are met, and the using effect of the user is improved.

Meanwhile, the radial bulge is arranged on the valve rod, and the axial distance between the center of the steel ball and the center of the groove is set to be equal to the distance between the end face of the radial bulge far away from the valve core and the end face of the first part close to the valve core, so that when a user pulls the valve rod to the maximum position in the switching process between the non-gear adjustment and the gear adjustment of the drawing valve rod, the steel ball just falls into the gear groove, and the switching process is more convenient and quicker.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following specific examples are described in detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model, are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model without limiting the utility model to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic view of the overall structure of a plug valve according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a cock switch in a non-gear adjustment mode according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a cock valve switch when a valve rod is pressed downwards for ignition in the embodiment of the utility model;

fig. 4 is a schematic structural diagram of a cock valve switch in a gear adjustment mode according to an embodiment of the utility model.

Description of the main elements in the figures:

1. an upper valve stem; 2. steel balls; 3. an adjusting screw; 4. a spring; 5. a lower valve stem; 6. a valve core deflector rod; 7. pressing a groove; 8. a microswitch; 9. a switch housing; 901. a first portion; 902. a second portion; 10. a groove; 11. a gear groove; 12. a chute; 13. an air outlet; 14. a valve body; 15. an air inlet; 16. a valve core; 17. and a radial protrusion.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 4, in the embodiment of the present invention, a plug valve switch is described, which includes a valve rod and a switch shell 9, a slide way coaxial with the switch shell 9 is provided in the switch shell 9, the valve rod penetrates through the switch shell 9 from the slide way, the diameter of the valve rod is the same as the inner diameter of the switch shell 9, and the valve rod is in sliding fit with the inner wall of the switch shell 9; two circles of grooves sunken on the peripheral wall, a gear groove 11 and a sliding groove 12 are arranged at the position where the valve rod penetrates through the switch shell 9; one side of the switch shell 9 is provided with a through hole which radially penetrates through the circumferential wall of the switch shell 9, a steel ball 2 which is supported by a spring 4 and has the same diameter as the inner diameter of the through hole is arranged in the through hole, part of the steel ball 2 is exposed out of the inner wall of the switch shell 9, and the exposed part of the steel ball 2 is clamped in a gear groove 11 or a sliding groove 12.

Preferably, in this embodiment, the valve rod is provided with a sliding groove 12 at a portion matching with the switch shell 9, one side of the sliding groove 12 is provided with a gear groove 11 adjacent to the sliding groove, and both the gear groove 11 and the sliding groove 12 are provided along the circumferential direction of the valve rod.

A gear matched with the steel ball is arranged in the gear groove 11, and when the exposed part of the steel ball 2 is correspondingly clamped in the gear groove 11, the valve rod can be subjected to gear adjustment; no gear is arranged in the sliding groove 12, and when the exposed part of the steel ball 2 is correspondingly clamped in the sliding groove 12, the valve rod can be adjusted in a non-gear mode. When the plug valve is used, a user can axially pull the valve rod to change the corresponding position of the exposed part of the steel ball 2, so that the corresponding position of the steel ball 2 is switched between the gear groove 11 and the sliding groove 12, and the switching between a plug valve gear adjusting mode and a non-gear adjusting mode is realized.

Example one

As shown in fig. 2 to 4, in this embodiment, a through hole radially penetrating through the circumferential wall of the switch case 9 is formed in one side of the switch case 9, the inner diameter of the through hole near the center of the switch case 9 is gradually reduced from outside to inside, and the inner diameters of the rest parts of the through hole are the same as the diameter of the steel ball 2, so that the steel ball 2 can be partially exposed and clamped in the through hole of the switch case 9, and the steel ball 2 is prevented from falling out of the through hole.

An internal thread is arranged at one end, far away from the center of the switch shell 9, in the through hole, an opening at the outer end of the through hole is plugged by an adjusting screw 3 which is connected onto the through hole in a threaded manner, and a spring 4 is supported between the adjusting screw 3 and the steel ball 2.

In the embodiment, a plurality of grooves 10 which are uniformly arranged along the circumferential direction of the valve rod are formed in the groove bottom of the gear groove 11, and the shape of each groove 10 is matched with the exposed part of each steel ball 2, so that the exposed part of each steel ball 2 can be just completely embedded into the corresponding groove 10. When the steel ball 2 is clamped in the gear groove 11, the steel ball 2 is supported against the groove bottom of the gear groove 11, the gear groove 11 extrudes the steel ball 2 to enable the spring 4 to shrink, the steel ball 2 sinks into the corresponding groove 10 after the valve rod rotates for a certain angle, and the steel ball 2 is separated from the groove 10 and sinks into the groove 10 adjacent to the groove 10 after the valve rod continues to rotate for a certain angle, so that the hand feeling during clamping is realized, and the comfort of hand feeling is improved. In addition, under the action of the spring 4, when the steel ball 2 enters the groove 10, a 'snap' prompt sound is given, and the valve rod is prompted to rotate to a corresponding fuel gas valve gear.

Preferably, in this embodiment, the width of the shift groove 11 is the same as the inner diameter of the through hole at the end close to the center of the switch case 9, so that after the steel ball is separated from one groove 10, it will not generate too large axial displacement before entering the next groove 10, and it can smoothly enter the next groove 10.

Preferably, in the present embodiment, the compression amount of the spring 4 is adjusted by the adjusting screw 3, so that the force of the spring 4 against the steel ball 2 is increased or decreased, the force required for rotating the valve stem is increased or decreased, and the warning sound generated when the valve stem is rotated is increased or decreased.

When the steel balls 2 are correspondingly clamped in the sliding grooves 12, the exposed parts of the steel balls 2 are propped against the bottom of the sliding grooves 12, and gears are not arranged in the sliding grooves 12, so that when the valve rod is rotated, the valve rod is not blocked and prompted, gear shifting handfeel cannot be generated, and a non-gear adjusting mode is realized.

Preferably, in the embodiment, the diameter of the valve rod at the chute 12 part is reduced, so that the exposed part of the steel ball 2 keeps a small jacking force with the chute 12 or the exposed part of the steel ball 2 just contacts with the chute bottom of the chute 12, and the friction force during the rotation of the valve rod is reduced.

When the plug valve is used, a user can change the corresponding position of the exposed part of the steel ball 2 by axially drawing the valve rod, so that the corresponding clamping position of the steel ball 2 is switched between the gear groove 11 and the sliding groove 12, and the switching between the gear adjustment and the non-gear adjustment of the plug valve is realized.

Preferably, in this embodiment, the diameter of the valve rod gradually decreases from the inner wall of the sliding groove 12 close to the shift groove 11 side to the bottom of the sliding groove 12, so that the inner wall of the sliding groove 12 close to the shift groove 11 side forms an arc-shaped surface, which reduces the resistance of the valve rod in the axial movement process and facilitates the use of the user.

Example two

As shown in fig. 2 to 4, the embodiment describes a plug valve switch, which includes a valve rod and a switch shell 9, wherein the valve rod penetrates through the switch shell 9, and a gear groove 11 and a sliding groove 12 are formed in the circumferential direction of the valve rod at the part of the valve rod, which is matched with the switch shell 9; the switch shell 9 is internally provided with a steel ball 2, the steel ball 2 is supported by a spring 4, part of the steel ball 2 is exposed out of the inner wall of the switch shell 9, and the exposed part is clamped in a gear groove 11 or a sliding groove 12. When the exposed part of the steel ball 2 corresponds to the gear groove 11, the gear adjustment can be carried out on the valve rod, and when the exposed part of the steel ball 2 corresponds to the sliding groove 12, the non-gear adjustment can be carried out on the valve rod.

When the plug valve is used, a user can change the clamping position of the exposed part of the steel ball 2 by axially drawing the valve rod, so that the corresponding position of the steel ball 2 is switched between the gear groove 11 and the sliding groove 12, and the switching between a plug valve gear adjusting mode and a non-gear adjusting mode is realized.

The lower end of the switch shell 9 extends outwards along the radial direction to form a mounting part, a lighting device of the stove is mounted on the mounting part, and a microswitch 8 of the lighting device penetrates through the peripheral wall of the switch shell 9 and is partially exposed out of the inner wall of the switch shell 9.

The valve rod is provided with a pressure groove 7 matched with the microswitch 8, the pressure groove 7 is arranged on one side far away from the sliding groove 12, and the groove wall of one side of the pressure groove 7 close to the sliding groove 12 is contacted with the microswitch 8. The sliding groove 12 extends axially to one side far away from the pressure groove 7, so that when the steel ball is correspondingly arranged in the sliding groove 12, the valve rod can axially slide relative to the switch shell 9. In the initial state, the steel ball is abutted against one end, close to the pressure groove 7, in the sliding groove 12, and in the ignition process, the valve rod is pressed down, so that the pressure groove 7 pushes the microswitch 8 to ignite.

As shown in fig. 2 and 4, when the non-gear adjustment mode needs to be changed into the gear adjustment mode, the valve rod is pulled, and the exposed part of the steel ball enters the gear groove 11; when the gear adjusting mode needs to be changed back to the non-gear adjusting mode, the valve rod is pressed down, and the steel ball returns to the non-gear groove 11.

Preferably, in this embodiment, the pressing groove 7 extends to a side away from the sliding groove 12 along the axial direction, so that the distance between the groove wall of the pressing groove 7 at the side away from the sliding groove 12 and the microswitch 8 is greater than the axial distance between the center of the steel ball 2 and the center of the groove 10. Therefore, in the process that a user pulls the valve rod to switch between non-gear adjustment and gear adjustment, the groove wall of the side, away from the sliding groove 12, of the pressure groove 7 is not in contact with the micro switch 8, mutual interference between the valve rod and the micro switch 8 in the switching process is prevented, and safety in the switching process is guaranteed.

EXAMPLE III

As shown in fig. 2 to 4, the valve rod penetrates through the switch shell 9, and a gear groove 11 and a sliding groove 12 are formed in the part of the valve rod, which is matched with the switch shell 9, along the circumferential direction of the valve rod; the switch shell 9 is internally provided with a steel ball 2, the steel ball 2 is supported by a spring 4, part of the steel ball is exposed out of the inner wall of the switch shell 9, and the exposed part of the steel ball is abutted against the gear groove 11 or the sliding groove 12.

When the exposed part of the steel ball 2 is abutted against the gear groove 11, the gear adjustment can be carried out on the valve rod, and when the exposed part of the steel ball 2 corresponds to the sliding groove 12, the non-gear adjustment can be carried out on the valve rod. When the plug valve is used, a user can axially pull the valve rod to change the corresponding position of the exposed part of the steel ball 2, so that the corresponding position of the steel ball 2 is switched between the gear groove 11 and the sliding groove 12, and the switching between a plug valve gear adjusting mode and a non-gear adjusting mode is realized.

Preferably, in this embodiment, the valve rod includes an upper valve rod 1 and a lower valve rod 5, the gear groove 11 and the sliding groove 12 are formed in the upper valve rod 1, the lower valve rod 5 abuts against the lower portion of the upper valve rod 1, the pressure groove 7 is formed in the lower valve rod 5, and the pressure groove 7 is matched with the micro switch 8. The sliding groove 12 extends axially towards one end far away from the gear groove 11, so that the valve rod can slide axially relative to the steel ball 2, and in an initial state, the steel ball is abutted against one end, close to the pressing groove 7, in the sliding groove 12.

Preferably, the upper valve rod 1 and the lower valve rod 5 are circumferentially positioned and axially movable relative to each other, as shown in fig. 3, during ignition, the upper valve rod 1 is pressed downwards, the upper valve rod 1 pushes the lower valve rod 5 to move downwards, and the pressure groove 7 pushes the microswitch 8 to ignite. As shown in fig. 4, when a user needs to switch from a non-gear adjustment mode to a gear adjustment mode, the upper valve rod 1 is lifted upwards, and the lower valve rod 5 is not driven to move upwards, so that the interference between the valve rod and the micro switch 8 in the process of switching the adjustment mode is avoided, and the safety in the use process is enhanced.

Preferably, in this embodiment, the lower end surface of the upper valve rod 1 is provided with a rectangular blind hole, the upper end of the lower valve rod 5 is provided with a rectangular projection which corresponds to the upper end of the upper valve rod and can be inserted into the lower end of the upper valve rod 5, and the upper valve rod 1 and the lower valve rod 5 are inserted with the rectangular projection, so that the upper valve rod and the lower valve rod are circumferentially positioned with each other and axially move relatively. Preferably, the length of the lower valve rod 5 inserted into the upper valve rod 1 is greater than the axial distance between the center of the steel ball 2 and the center of the groove 10, so that the situation that the upper valve rod 1 and the lower valve rod 5 are separated from each other in the process of switching the plug valve switch from the non-gear adjusting mode to the gear adjusting mode is prevented.

Example four

As shown in fig. 4, in the present embodiment, the switch case 9 includes a first portion 901 and a second portion 902, and the first portion 901 and the second portion 902 are coaxially arranged, wherein the inner diameter of the first portion 901 is smaller than the inner diameter of the second portion 902. The first portion 901 and the second portion 902 are integrally formed, and the upper stem 1 is fitted to the first portion 901, and the lower stem 5 is fitted to the second portion 902.

Preferably, in this embodiment, one end of the upper valve stem 1 near the shift groove 11 extends radially outwards, a radial protrusion 17 is formed at the end surface of the upper valve stem 1, the diameter of the radial protrusion 17 is the same as the inner diameter of the second portion 902, the lower end of the upper valve stem 1 is matched with the second portion 902 through the radial protrusion 17, and the upper valve stem 1 abuts against the lower valve stem 5 through the radial protrusion 17.

The spout 12 is to keeping away from the one end axial extension of gear groove 11, during initial condition, steel ball 2 corresponds the one end that is close to gear groove 11 in spout 12, the axial distance between 2 centers of steel ball and the gear groove 11 inner groovy 10 center equals the radial bulge 17 and keeps away from the distance between the terminal surface of lower valve rod 5 and the first portion 901 this moment, valve rod 1 is pulled up to the user, with the plug valve from non-gear mode of adjusting to gear mode in-process, first portion 901 of switch shell 9 will with radial bulge 17 between carry on spacingly, thereby, when the user is with last valve rod 1 to pull to the maximum position, the steel ball exposes the part and just corresponds in gear groove 11, make the switching process more convenient and fast.

EXAMPLE five

As shown in fig. 1 to 4, the embodiment of the present invention discloses a plug valve, which includes a valve body 14 and a valve core 16, wherein the valve body 14 is provided with an air inlet hole 15 and an air outlet hole 13.

A plug valve switch is fixedly mounted on the valve body 14 in any mode and comprises a valve rod and a switch shell 9, the valve rod is circumferentially positioned between one end of the valve rod and the valve core 16, the valve core 16 can rotate synchronously along with the valve rod, a return spring for returning the valve rod is mounted between the valve rod and the valve core 16, and the other end of the valve rod penetrates through the switch shell 9.

The valve rod comprises an upper valve rod 1 and a lower valve rod 5, a gear groove 11 and a sliding groove 12 are formed in the upper valve rod 1, one end of the upper valve rod 1 is matched with the switch shell 9, and the other end of the upper valve rod passes through the switch shell 9 and extends to one side far away from the valve core 16. One end of the upper valve rod 1 close to the valve core 16 is connected with a lower valve rod 5 in a propping mode, and the lower valve rod 5 is matched with the switch shell 9. Rectangular blind holes are formed in the lower end face of the upper valve rod 1, the upper end of the lower valve rod 5 is provided with rectangular convex blocks which are abutted to the upper end of the lower valve rod and can be inserted into the rectangular convex blocks, the upper valve rod 1 and the lower valve rod 5 are connected in an inserted mode, circumferential mutual positioning is achieved between the upper valve rod 1 and the lower valve rod 5, and axial relative movement can be achieved. One end of the lower valve rod 5, which is far away from the upper valve rod 1, is connected with the valve core 16 through the valve core 16 deflector rod 6, so that the valve rod and the valve core 16 can move relatively in the axial direction, and the circumferential directions are limited mutually, and the valve core 16 rotates synchronously along with the valve rod.

The part of the upper valve rod 1, which is matched with the switch shell 9, is circumferentially provided with a sliding groove 12, one side of the sliding groove 12, which is close to the valve core 16, is provided with a gear groove 11, a steel ball 2 is arranged in the switch shell 9, the steel ball 2 is supported by a spring 4, part of the steel ball is exposed out of the inner wall of the switch shell 9, and the exposed part of the steel ball is corresponding to the gear groove 11 or the sliding groove 12. No gear is arranged in the sliding groove 12, and when the exposed part of the steel ball 2 is in the sliding groove 12, the non-gear adjustment can be carried out on the valve rod; the gear groove 11 is internally provided with a gear matched with the steel ball 2, and when the exposed part of the steel ball 2 corresponds to the gear groove 11, the gear of the valve rod can be adjusted. The corresponding position of the switchable steel ball 2 of the upper valve rod 1 can be switched between the sliding groove 12 and the gear groove 11 in the axial drawing mode, different requirements of users on adjusting hand feeling of the plug valve are met, and the using effect of the users is improved.

Preferably, the switch housing 9 comprises a first portion 901 and a second portion 902, the first portion 901 and the second portion 902 being coaxially arranged, wherein the inner diameter of the first portion 901 is smaller than the inner diameter of the second portion 902. The first portion 901 and the second portion 902 are integrally formed, and the upper stem 1 is fitted to the first portion 901, and the lower stem 5 is fitted to the second portion 902. One end of the upper valve rod 1 close to the gear groove 11 extends radially outwards, a radial protrusion 17 is formed at the end face of the upper valve rod 1, the diameter of the radial protrusion 17 is the same as the inner diameter of the second part 902, the lower end of the upper valve rod 1 is matched with the second part 902 through the radial protrusion 17, and meanwhile, the upper valve rod 1 is abutted to the lower valve rod 5 through the radial protrusion 17.

At the beginning, the steel ball 2 corresponds to the end close to the gear groove 11 in the sliding groove 12, at this time, the axial distance between the center of the steel ball 2 and the center of the groove 10 in the gear groove 11 is equal to the distance between the end surface of the radial protrusion 17 far away from the lower valve rod 5 and the first part 901, when a user lifts the upper valve rod 1 upwards to switch the plug valve from a non-gear adjusting mode to a gear adjusting mode, the first part 901 of the switch shell 9 is limited with the radial protrusion 17, and therefore when the user lifts the upper valve rod 1 to the maximum position, the exposed part of the steel ball just corresponds to the gear groove 11.

The lower valve rod 5 is provided with a pressure groove 7 at the part matched with the switch shell 9, the switch shell 9 is provided with a striking device, a microswitch 8 of the striking device penetrates through the wall of the switch shell 9, part of the microswitch is exposed out of the inner wall of the switch shell 9 and is matched with the pressure groove 7, and when the lower valve rod 5 moves axially, the groove wall of the pressure groove 7 presses the microswitch 8 to ignite the striking device. The sliding groove 12 extends axially to one end far away from the gear groove 11, and the extending distance is at least equal to the axial distance of the valve rod moving in the process that the pressure groove 7 presses the microswitch 8. In an initial state, the steel ball corresponds to one end, close to the pressure groove 7, in the sliding groove 12, and when ignition is performed, the upper valve rod 1 is pressed downwards, the upper valve rod 1 pushes the lower valve rod 5 to move downwards, so that the pressure groove 7 pushes the microswitch 8 to perform ignition.

After ignition is finished, the valve rod returns to the initial position under the action of the return spring, the exposed part of the steel ball 2 is correspondingly arranged in the sliding groove 12 at the moment, the non-gear adjusting mode is adopted, if the gear adjusting mode needs to be switched, the upper valve rod 1 only needs to be lifted to the maximum position, and the steel ball 2 enters the gear groove 11; the valve rod is pressed down, the exposed part of the steel ball 2 returns to the chute 12 again, the non-gear adjusting mode of the plug valve is carried out, and the switching process is convenient and fast. Meanwhile, the upper valve rod 1 and the lower valve rod 5 are axially separable, so that when the upper valve rod 1 is pulled to switch the adjusting modes, axial relative motion is generated between the upper valve rod 1 and the lower valve rod 5, interference between the activity of the pressure groove 7 on the lower valve rod 5 and the microswitch 8 is prevented, the safety of the device is enhanced, and the using effect of a user is improved.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. A plug valve switch comprises a valve rod and a switch shell (9), and is characterized in that a coaxial slide way is arranged in the switch shell (9), the valve rod penetrates through the switch shell (9) from the slide way, and the valve rod is in sliding fit with the inner wall of the switch shell (9); two circles of grooves, a gear groove (11) and a sliding groove (12) which are sunken on the peripheral wall are arranged at the position where the valve rod penetrates through the switch shell (9);

one side of the switch shell (9) is provided with a through hole which radially penetrates through the circumferential wall of the switch shell (9), a steel ball (2) which is supported by a spring (4) and has the same diameter as the inner diameter of the through hole is arranged in the through hole, part of the steel ball (2) is exposed out of the inner wall of the switch shell (9), and the exposed part of the steel ball (2) is clamped in a gear groove (11) or a sliding groove (12).

2. A cock valve switch according to claim 1, characterised in that the through hole has an inner diameter at one end near the centre of the switch housing (9) which is smaller than the diameter of the steel ball (2);

the inner diameter of the through hole close to the center of the switch shell (9) is gradually reduced from outside to inside.

3. The plug valve switch according to claim 2, wherein the stop groove (11) is supported against the steel ball (2), the bottom of the stop groove is provided with a plurality of grooves (10) matched with the steel ball (2), the plurality of grooves (10) are uniformly arranged along the circumferential direction of the valve rod, and the shape of the groove (10) is matched with the exposed part of the steel ball (2);

the width of the gear groove (11) is the same as the inner diameter of one end of the through hole close to the center of the switch shell (9).

4. A cock valve switch according to claim 3, characterised in that the wall of the chute (12) on the side close to the gear groove (11) is provided with a curved surface facing in the direction of the gear groove (11).

5. A cock valve switch according to claim 4, characterised in that one side of the switch housing (9) is provided with a microswitch (8), the microswitch (8) being partly exposed out of the inner wall of the switch housing (9);

a pressure groove (7) is formed in the valve rod along the circumferential direction of the valve rod, the pressure groove (7) is matched with the micro switch (8), and the pressure groove (7) is formed in one side, away from the sliding groove (12).

6. A cock valve switch according to claim 5, characterised in that the slide groove (12) extends axially to the side remote from the pressure groove (7), and the steel ball abuts against the end of the slide groove (12) adjacent to the pressure groove (7).

7. A cock valve switch as claimed in any one of claims 1 to 6, characterised in that the valve stem comprises an upper stem (1) and a lower stem (5), the shift gate (11) and the slide gate (12) being provided on the upper stem (1);

go up valve rod (1) and be close to one side butt joint of gear groove (11) and have lower valve rod (5), set up indent (7) on lower valve rod (5), go up circumferential location between valve rod (1) and lower valve rod (5).

8. A tap valve switch according to claim 7, characterised in that the switch housing (9) comprises a first (901) and a second (902) coaxial part, the first (901) and second (902) parts being integrally formed, the upper stem (1) cooperating with the first part (901) and the lower stem (5) cooperating with the second part (902);

one end of the upper valve rod (1) close to the lower valve rod (5) is provided with a radial protrusion (17) matched with the second part (902), and the upper valve rod (1) is abutted to the lower valve rod (5) through the radial protrusion (17).

9. A cock valve switch as claimed in claim 8, characterised in that the axial distance between the centre of the steel ball (2) and the centre of the recess (10) is equal to the distance between the end surface of the radial projection (17) remote from the lower stem (5) and the first portion (901).

10. A plug valve comprising a valve body (14) and a valve core (15), wherein the valve body (14) is provided with a plug valve switch according to any one of claims 1 to 9, and the valve rod and the valve core (15) are circumferentially positioned.

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