CN111927957A

CN111927957A - Self-pressure sealing stop valve

Info

Publication number: CN111927957A
Application number: CN202010583296.XA
Authority: CN
Inventors: 孙晋; 朱金华; 高明; 汤雯娟
Original assignee: Newman Yancheng Valve Manufacturing Co ltd
Current assignee: Newman Yancheng Valve Manufacturing Co ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2020-11-13

Abstract

The invention discloses a self-pressure sealing stop valve, which comprises: the stop valve body, the upper end of stop valve body is provided with the valve gap, it is provided with the valve rod to rotate on the valve gap, the lower extreme of valve rod passes the valve gap and extends to this internally with the stop valve, the lower extreme of valve rod is connected with the valve plate, the left side of stop valve body is the intake antrum, the centre is the disk seat, the right side is for going out the water cavity, the lower surface of valve plate is provided with interior screw hole, the interior top surface of interior screw hole is provided with first inner groovy, the internal diameter of first inner groovy is greater than the internal diameter of interior screw hole, be provided with gasbag mechanism in the first inner groovy, be provided with a valve seat section of thick bamboo on. This valve plate in the sealed stop valve of self pressure couples together a disk seat section of thick bamboo spiro union for a disk seat section of thick bamboo is sealed by the gasbag mechanism in the first inner groovy, and then has realized cutting off the medium, and sealed joint department is difficult for producing the clearance, avoids producing and leaks.

Description

Self-pressure sealing stop valve

Technical Field

The invention relates to the technical field of stop valves, in particular to a self-pressure sealing stop valve.

Background

The valves on the pipelines are various, wherein the stop valve is a commonly used valve for controlling the cut-off or flow regulation of various flowing media such as air, water, steam and the like, the opening and closing part of the stop valve is a plug-shaped valve plate, the sealing surface is a plane or a conical surface, and the valve plate moves linearly along with the lifting of the valve rod. The existing stop valve mainly comprises a valve body, a valve cover, a valve rod and a valve plate, wherein a sealing gasket is arranged between the valve plate and the valve body and used for sealing a medium and avoiding the leakage of the medium along a gap between the valve plate and the valve body, but because the flowing medium in the valve often has higher pressure and the pressure generally acts on a joint (hereinafter referred to as a sealing joint surface) between the sealing gasket and the valve plate and between the sealing gasket and the valve body, the excessively high pressure of the flowing medium can form a separation effect on the sealing joint surface, so that the sealing joint surface tends to generate a gap, the flowing medium is easy to permeate outwards through the sealing joint surface, and the sealing performance is further influenced.

The self-sealing effect of the existing stop valve is poor, so that a gap is easily generated at the sealing joint, and meanwhile, the valve plate can have the serious abrasion condition when a regular switch is used, so that the gap cannot be effectively sealed, and the internal liquid or gas leakage is harmful to the health of a user. Therefore, there is a need for a self-sealing shut-off valve that at least partially solves the problems of the prior art.

Disclosure of Invention

In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

To at least partially solve the above problems, the present invention provides a self-pressure sealing shut-off valve comprising:

the stop valve body, the upper end of stop valve body is provided with the valve gap, it is provided with the valve rod to rotate on the valve gap, the lower extreme of valve rod passes the valve gap extend to with this is internal to the stop valve, the lower extreme of valve rod is connected with the valve plate, the left side of stop valve body is the intake antrum, and the centre is the disk seat, and the right side is for going out the water cavity, the lower surface of valve plate is provided with interior screw hole, the interior top surface of interior screw hole is provided with first inner groovy, the internal diameter of first inner groovy is greater than the internal diameter of interior screw hole, be provided with gasbag mechanism in the first inner groovy, be provided with a valve seat section of thick bamboo on the disk seat, the surface of a valve seat section of thick bamboo.

Preferably, an extension cylinder is arranged at the upper end of the valve seat cylinder, a plurality of first annular grooves are formed in the outer surface of the extension cylinder, the air bag mechanism is in an inverted U shape, and annular protruding strips corresponding to the first annular grooves are formed in the inner surface of the air bag mechanism, so that the plurality of first annular grooves are connected with the plurality of annular protruding strips in an engaged manner.

Preferably, wherein, gasbag mechanism includes gasbag body and supporting mechanism, the supporting mechanism sets up in the gasbag body, the supporting mechanism includes first support cover, second support cover, a plurality of first spring and a plurality of second spring, the second support cover sets up in the first support cover, the annular protrusion sets up on the inner wall of second support cover, first support cover, the second support cover is made by memory metal, and is a plurality of first spring all establishes between the upper surface of second support cover with the lower top surface of first support cover, the second spring sets up the lateral wall of second support cover with between the lateral wall of first support cover.

Preferably, the airbag mechanism further includes a pressing member, the pressing member includes a pre-pressing plate and a third spring, a pre-pressing hole is formed in the inner top surface of the first inner groove, the pre-pressing plate is arranged on the upper top surface of the airbag body, and the third spring is arranged in the pre-pressing hole and connected to the pre-pressing plate in a propping manner.

Preferably, a circular cross plate is arranged between the valve plate and the valve rod, a circular cross plate is arranged on an inner wall of the stop valve body above the valve seat, the circular cross plate is larger than the circular cross plate in diameter, the circular cross plate in diameter is larger than the maximum diameter of the valve plate, a plurality of second annular grooves are formed in the upper surface of the circular cross plate, a plurality of third annular grooves are formed in the lower surface of the circular cross plate, a first sealing ring is arranged in each third annular groove, each first sealing ring is provided with an annular cavity, an inner annular pipe is arranged in each annular cavity, and each inner annular pipe is made of memory metal, so that the first sealing ring is connected into the second annular grooves.

Preferably, the stop valve body is matched with an impurity removal device, the impurity removal device comprises a motor shell, a motor, a screw, an impurity removal circular plate and a support rod, a left groove is formed in a left base of the valve seat, the left groove is formed in the left surface of the left base, an internal thread and a vertical retaining ring are arranged on the inner wall of the water inlet cavity, the vertical retaining ring is located at the left end of the water inlet cavity, the internal thread is located on the right side of the vertical retaining ring, the support rod is arranged in the vertical retaining ring, the left end of the screw is rotatably connected with the support rod, the right end of the screw is rotatably connected with the inner bottom surface of the left groove, the motor shell is arranged on the stop valve body, the motor is arranged in the motor shell, and a motor shaft of the motor penetrates through the stop valve body and extends into the left groove to be rotatably connected with the screw;

the edulcoration plectane includes outer circle, interior plectane spiro union be in on the double-screw bolt and with the inner wall spiro union of intake antrum, the left surface of interior plectane be provided with erect the second sealing washer that the retainer plate corresponds, outer circle sets up on the right surface of interior plectane, be provided with a plurality of second inner groovies on the outer circular washer, be provided with edulcoration portion in the second inner groovy.

Preferably, the trash removal part comprises bristles, a support block and a corrugated support plate, the corrugated support plate and the support block are arranged in the second inner groove, the bristles are arranged on the support block, the corrugated support plate selectively abuts against the support block, and the corrugated support plate is made of memory metal.

Preferably, a through hole is formed in the stop valve body, a sealing sleeve and a sealing ring are arranged in the through hole, and a motor shaft of the motor penetrates through the sealing sleeve and the sealing ring.

Preferably, the lower surface of the valve plate is provided with second bristles, and the second bristles are arranged around the valve seat barrel.

Compared with the prior art, the invention at least comprises the following beneficial effects:

according to the self-pressure sealing stop valve, the valve plate in the self-pressure sealing stop valve is used for screwing the valve seat barrel together, so that the valve seat barrel is sealed by the air bag mechanism in the first inner groove, further, a medium is cut off, a gap is not easy to generate at a sealing joint, and leakage is avoided.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a self-pressure sealing stop valve according to the present invention.

Fig. 2 is a schematic structural diagram of an air bag mechanism in the self-pressure sealing stop valve.

Fig. 3 is a schematic structural diagram of an air bag mechanism and an extension cylinder in the self-pressure sealing stop valve according to the present invention.

Fig. 4 is a schematic structural diagram of a circular cross plate in the self-pressure sealing stop valve of the present invention.

FIG. 5 is a schematic view of a portion of the trash removal mechanism of the self-pressure sealing stop valve according to the present invention.

FIG. 6 is a right side view of the structure of the trash removal mechanism in the self-pressure sealing stop valve according to the present invention.

FIG. 7 is a right side view of another construction of the trash removal mechanism of the self-pressure sealing shut-off valve of the present invention.

Fig. 8 is a schematic structural view of a motor and a motor case in the self-pressure sealing stop valve of the invention.

Detailed Description

The present invention is further described in detail below with reference to the drawings and examples so that those skilled in the art can practice the invention with reference to the description.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1-8, the present invention provides a self-pressure sealing shut-off valve comprising:

the stop valve comprises a stop valve body 1, a valve cover 102 is arranged at the upper end of the stop valve body 1, a valve rod 103 is rotatably arranged on the valve cover 102, the lower end of the valve rod 103 passes through the bonnet 102 and extends into the cut-off valve body 1, the lower end of the valve rod 103 is connected with a valve plate 104, the left side of the stop valve body 1 is provided with a water inlet cavity 105, the middle part is provided with a valve seat 106, the right side is provided with a water outlet cavity, the lower surface of the valve plate 104 is provided with an inner screw hole 107, the inner top surface of the inner screw hole 107 is provided with a first inner groove 108, the inner diameter of the first inner groove 108 is larger than that of the inner screw hole 107, an air bag mechanism 2 is arranged in the first inner groove 108, a valve seat cylinder 109 is arranged on the valve seat 106, and an external thread corresponding to the internal thread hole 107 is arranged on the outer surface of the valve seat cylinder 109, so that the valve plate 104 is selectively connected with the valve seat cylinder 109 in a sealing way.

The working principle of the technical scheme is as follows: the invention provides a self-pressure sealing stop valve which is mainly used for cutting off various fluid media such as air, water, steam and the like; the middle of the water inlet cavity 105 of the stop valve body 1 is a valve seat 106, and the right side of the water inlet cavity is a water outlet cavity, namely, a medium flows from left to right; when the valve seat is used by an operator, the valve rod 103 is rotated downwards by rotating the valve rod 103, so that the valve plate 104 at the lower end of the valve rod 103 is connected with the valve seat barrel 109 on the valve seat 106 in a threaded manner, the valve seat barrel 109 is screwed into the inner threaded hole 107 on the lower surface of the valve plate 104, the inner diameter of the first inner groove 108 is larger than that of the inner threaded hole 107, the air bag mechanism 2 is arranged in the first inner groove 108, the valve seat barrel 109 is sealed by the air bag mechanism 2 in the first inner groove 108 when entering the inner threaded hole 107, further, the medium is cut off, a gap is not easily generated at the sealing joint, and leakage is avoided.

The beneficial effects of the above technical scheme are that: through the design of the structure, the invention provides the self-pressure sealing stop valve, the valve plate 104 in the self-pressure sealing stop valve is used for screwing the valve seat cylinder 109, so that the valve seat cylinder 109 is sealed by the air bag mechanism 2 in the first inner groove 108, the medium is cut off, a gap is not easy to generate at the sealing joint, and the leakage is avoided.

In one embodiment, the upper end of the valve seat cylinder 109 is provided with an extension cylinder 110, the outer surface of the extension cylinder 110 is provided with a plurality of first annular grooves 111, the airbag mechanism 2 is in an inverted U shape, and the inner surface of the airbag mechanism is provided with an annular protrusion strip 201 corresponding to the first annular grooves 111, so that the plurality of first annular grooves 111 are in snap connection with the plurality of annular protrusions 201.

The working principle of the technical scheme is as follows: the screw thread between interior screw hole 107 in the valve plate 104 and the valve seat section of thick bamboo 109, itself just has certain leakproofness, in order to further strengthen the leakproofness, be provided with extension section of thick bamboo 110 in the upper end of valve seat section of thick bamboo 109, and do not have the external screw thread on the outer wall of extension section of thick bamboo 110, just designed a plurality of first annular recess 111, the internal surface annular protrusion strip 201 of the gasbag mechanism 2 that corresponds, gasbag mechanism 2 is the U type of invering, can wrap extension section of thick bamboo 110, annular protrusion strip 201 can be got up with first annular recess 111 joint, further increase the leakproofness between gasbag mechanism 2 and the valve seat section of thick bamboo 109.

The beneficial effects of the above technical scheme are that: through the design of above-mentioned structure, provided extension section of thick bamboo 110, first annular groove 111, annular protrusion strip 201 isotructure in the embodiment for when a valve seat section of thick bamboo 109 extrudees gasbag mechanism 2, gasbag mechanism 2 also wraps up extension section of thick bamboo 110, and annular protrusion strip 201 can get up with first annular groove 111 joint, further increases the leakproofness between gasbag mechanism 2 and the valve seat section of thick bamboo 109 again.

In one embodiment, the airbag mechanism 2 includes an airbag body 21 and a support mechanism 22, the support mechanism 22 is disposed in the airbag body 21, the support mechanism 22 includes a first support cover 221, a second support cover 222, a plurality of first springs 223, and a plurality of second springs 224, the second support cover 222 is disposed in the first support cover 221, the annular protrusion 201 is disposed on an inner wall of the second support cover 222, each of the first support cover 221 and the second support cover 222 is made of a memory metal, the plurality of first springs 223 are disposed between an upper top surface of the second support cover 222 and a lower top surface of the first support cover 221, and the second springs 224 are disposed between a side wall of the second support cover 222 and a side wall of the first support cover 221.

The working principle of the technical scheme is as follows: the present embodiment provides an airbag mechanism 2, the airbag mechanism 2 specifically includes an airbag body 21 and a support mechanism 22, the support mechanism 22 includes a first support cover 221, a second support cover 222, a plurality of first springs 223 and a plurality of second springs 224, and further sets the support mechanism 22 into an inverted U shape to cover the valve seat cylinder 109, wherein the first support cover 221 and the second support cover 222 are both made of memory metal, and the sealing connection between the airbag body 21 and the valve seat cylinder 109 is achieved by utilizing the elasticity of the first support cover 221, the second support cover 222 and the elasticity of the first springs 223 and the second springs 224 in a normal state; when the valve plate 104 is closed on the valve seat cylinder 109, the valve plate 104 cuts off high-temperature media, such as high-temperature water, so the first support cover 221 and the second support cover 222 can be expanded by heat to further support the airbag body 21, so that the airbag body 21 and the valve seat cylinder 109 have better sealing performance, and the airbag body 21 and the valve seat cylinder 109 cannot be separated.

The beneficial effects of the above technical scheme are that: through the design of the structure, the embodiment provides a specific structure of the airbag mechanism 2, the airbag mechanism 2 includes the airbag body 21 and the support mechanism 22, and the support mechanism 22 includes the first support cover 221, the second support cover 222, the plurality of first springs 223 and the plurality of second springs 224, and both the first support cover 221 and the second support cover 222 are made of memory metal, so that the airbag mechanism 2 can be connected with the valve seat cylinder 109 in a sealing manner all the time, and the phenomenon that the airbag body 21 is separated from the valve seat cylinder 109 does not occur.

In one embodiment, the airbag mechanism 2 further includes a pressing member, the pressing member includes a pre-pressing plate 225 and a third spring 226, the inner top surface of the first inner groove 108 is provided with a pre-pressing hole 112, the pre-pressing plate 225 is disposed on the upper top surface of the airbag body 21, and the third spring 226 is disposed in the pre-pressing hole 112 and is connected to the pre-pressing plate 225 in a pressing manner.

The working principle of the technical scheme is as follows: in order to further improve the supporting performance of the airbag mechanism 2, a pressing member is further designed on the airbag mechanism 2, and the third spring 226 presses against the pre-pressing plate 225, so that the pre-pressing plate 225 can press against the airbag mechanism 2.

The beneficial effects of the above technical scheme are that: through the design of the above structure, the pressing member is provided in this embodiment, and the pressing member includes the pre-pressing plate 225 and the third spring 226, which can increase the downward pressing force for the airbag mechanism 2, and prevent the valve seat cylinder 109 from pressing the airbag mechanism 2 too much upward.

In one embodiment, a cross-plate 113 is disposed between the valve plate 104 and the valve stem 103, a cross-baffle ring 114 is disposed on an inner wall of the stop valve body 1 above the valve seat 106, a diameter of the cross-plate 113 is greater than an inner diameter of the cross-baffle ring 114, the inner diameter of the cross-baffle ring 114 is greater than a maximum diameter of the valve plate 104, a plurality of second annular grooves are disposed on an upper surface of the cross-baffle ring 114, a plurality of third annular grooves are disposed on a lower surface of the cross-plate 113, a first sealing ring 115 is disposed in each third annular groove, the first sealing ring 115 has an annular cavity, an inner annular pipe 116 is disposed in each annular cavity, and the inner annular pipe 116 is made of a memory metal, such that the first sealing ring 115 is connected in the second annular groove.

The working principle of the technical scheme is as follows: a transverse circular plate 113 is arranged between the valve plate 104 and the valve rod 103, a transverse baffle ring 114 is arranged on the inner wall of the corresponding stop valve body 1 above the valve seat 106, when the valve rod 103 drives the valve plate 104 to move downwards, the valve plate 104 passes through the transverse baffle ring 114, and in order to prevent the valve plate 104 from being clamped on the valve seat cylinder 109 by movement, that is, the valve seat cylinder 109 is prevented from excessively extruding the airbag body 2, and the transverse circular plate 113 is blocked by the transverse baffle ring 114 to play a limiting role; the first sealing ring 115 is designed on the cross circular plate 113, the first sealing ring 115 is supported by the inner ring pipe 116, the inner ring pipe 116 is made of memory metal, so that the shape is fixed in a normal state and the first sealing ring 115 has better supporting capability, the first sealing ring 115 is clamped between the second annular groove and the third annular groove, the medium is prevented from remaining above the cross circular plate 113, and the medium in the water outlet cavity is prevented from flowing back to the position above the cross circular plate 113.

The beneficial effects of the above technical scheme are that: through the design of the above structure, the present embodiment provides the structure of the circular cross plate 113, the crosspiece ring 114, the second annular groove, the third annular groove, the first sealing ring 115, etc., so as to achieve the sealing connection between the circular cross plate 113 and the crosspiece ring 114, avoid the medium remaining above the circular cross plate 113, and also avoid the medium in the water outlet cavity from flowing back to the upper side of the circular cross plate 113; meanwhile, the inner collar 116 is made of memory metal to better support the first sealing ring 115, thereby further improving the sealing performance.

In one embodiment, the stop valve body 1 is matched with an impurity removing device, the impurity removing device comprises a motor shell 301, a motor 302, a screw 303, an impurity removing circular plate 304 and a support rod 305, a left groove 117 is formed on the left base of the valve seat 106, the left groove 117 is formed on the left surface of the left base, the inner wall of the water inlet cavity 105 is provided with internal threads and a vertical retaining ring 118, the vertical retaining ring 108 is positioned at the left end of the water inlet cavity 105, the internal thread is located on the right side of the vertical retaining ring 118, the strut 305 is arranged in the vertical retaining ring 118, the left end of the screw 303 is rotatably connected with the support bar 305, the right end is rotatably connected with the inner bottom surface of the left groove 117, the motor casing 301 is arranged on the stop valve body 1, the motor 302 is arranged in the motor casing 301, a motor shaft 307 of the motor 302 penetrates through the stop valve body 1 and extends into the left groove to be rotationally connected with the screw 303;

the impurity removing circular plate 304 comprises an outer circle 308 and an inner circular plate 309, the inner circular plate 309 is screwed on the stud 303 and screwed with the inner wall of the water inlet cavity 105, a second sealing ring 310 corresponding to the vertical check ring 118 is arranged on the left surface of the inner circular plate 309, the outer circle 308 is arranged on the right surface of the inner circular plate 309, a plurality of second inner grooves 311 are arranged on the outer circle 308, and an impurity removing part is arranged in the second inner grooves 311.

The working principle of the technical scheme is as follows: because the self-pressure sealing stop valve of the invention is used for controlling the cutting off or flow adjusting of various fluid media such as air, water, steam and the like, especially when the stop valve body 1 passes through hot water, some impurities such as scale can be left on the inner wall of the water inlet cavity 105 of the stop valve body 1, so the inner wall of the water inlet cavity 105 needs to be cleaned frequently, therefore, an impurity removing device is matched with the stop valve body 1, when the impurities and the scale need to be cleaned, an operator starts the motor 302, the motor shaft 307 of the motor 302 rotates to drive the stud 303 to rotate, the impurity removing circular plate 304 on the stud 303 is also rotated, because the inner circular plate 309 in the impurity removing circular plate 304 is screwed with the inner wall of the water inlet cavity 105, the left-right movement and the axial rotation of the impurity removing circular plate 304 along the stud 303 can be realized, the axial rotation of the plate 309 further drives the inner circular ring 308 to rotate, at this time, the inner wall of the water inlet cavity 105 can be cleaned by the impurity removing part in the second inner groove 311 on the outer circle 308 to remove water scale;

when the medium normally passes through the stop valve body 1, the impurity removing circular plate 304 is accommodated in the left groove 117, so that the flow design of the stop valve body 1 is not influenced; when scale needs to be cleaned, the stop valve body 1 is closed, so the impurity removing circular plate 304 has another purpose, the impurity removing circular plate 304 is driven by the stud 303 to be close to the vertical retaining ring 118, when the inner circular plate 309 abuts against the vertical retaining ring 118, the second sealing ring 310 designed on the inner circular plate 309 realizes sealing with the vertical retaining ring 118, the pressure of medium on the valve plate 104 is reduced, namely, the impurity removing circular plate 304 can relatively cut off the flow of the medium, and the sealing effect of the air bag mechanism 2 is better when the valve plate 104 is closed on the valve seat cylinder 109.

The beneficial effects of the above technical scheme are that: through the design of above-mentioned structure, the edulcoration device is provided in this embodiment, this edulcoration device includes motor casing 301, motor 302, screw rod 303, edulcoration plectane 304 and branch 305, edulcoration plectane 304 wherein includes outer circle 308, interior plectane 309 for the edulcoration device of this structure is functional many, not only can clear up the inner wall to intake chamber 105, remove the incrustation scale, can also be relative cut off the medium and flow, make the valve plate 104 closed when on a valve seat section of thick bamboo 109 the sealed effect of gasbag mechanism 2 better, the life of gasbag mechanism 2 has been prolonged.

As shown in fig. 6 and 7, in one embodiment, the trash removal part includes first bristles 312, a support block 313, and a corrugated plate 314, the corrugated plate 314 and the support block 313 are disposed in the second inner groove 311, the first bristles 312 are disposed on the support block 313, the corrugated plate 314 selectively abuts against the support block 313, and the corrugated plate 313 is made of memory metal.

The working principle of the technical scheme is as follows: because the self-pressure sealing stop valve of the invention is used for controlling the cutting off or adjusting the flow of various fluid media such as air, water, steam and the like, particularly when hot water passes through the stop valve body 1, impurities such as scale are left on the inner wall of the water inlet cavity 105 of the stop valve body 1, so that the inner wall of the water inlet cavity 105 needs to be cleaned frequently, when the stud 303 drives the impurity removing circular plate 304 to rotate, the impurity removing circular plate 304 moves left and right along the length direction of the stud 303 on one hand, on the other hand, the impurity removing circular plate 304 also rotates axially, so as to drive the impurity removing part to clean the inner wall of the water inlet cavity 105, after the valve seat 104 is connected with the valve seat barrel 109, because the fold support plate 314 is made of memory metal, the fold part extends after the fold support plate 314 is heated, so that the support plate 314 supports the support block 313, and the first brush bristles 312 are supported to abut against the inner wall of the, along with the axial rotation of the inner circular plate 309 on the inner wall bracket of the water inlet cavity 105, scale on the inner wall of the water inlet cavity 105 is cleaned; after the corrugated support plate 314 gradually dissipates heat, the corrugation is restored, so that the corrugated support plate 314 pulls the support block 313 back to the second inner groove 311, the first bristles 312 can be separated from the inner wall of the water inlet cavity 105, and the first bristles 312 are prevented from being always in a contact state with the inner wall of the water inlet cavity 105;

the first bristles 312 have enough margin, that is, as the first bristles 312 are consumed by contacting with the inner wall of the water inlet cavity 105, the corrugated plate 314 is heated to expand, so that the first bristles 312 contact with the inner wall of the water inlet cavity 105, a length compensation effect is achieved, the first bristles 312 can always contact with the inner wall of the water inlet cavity 105 when being heated to expand, and only the first bristles 312 are consumed to a sufficient length, so that the service life of the first bristles 312 is prolonged.

The beneficial effects of the above technical scheme are that: through the design of the structure, the specific structure of the impurity removing part is provided in the embodiment, and the impurity removing part of the structure is simple in structure and convenient to use; the impurity removing part comprises first bristles 312, a supporting block 313 and a corrugated supporting plate 314, wherein the corrugated supporting plate 314 is made of memory metal, and by utilizing the characteristic of heat and cold shrinkage of the corrugated supporting plate 314, the first bristles 312 do not always contact the inner wall of the water inlet cavity 105, but the corrugated supporting plate 314 enables the first bristles 312 to always contact the inner wall of the water inlet cavity 105 when the first bristles 312 expand under heat, only the first bristles 312 are consumed to a sufficient length, and the service life of the first bristles 312 is further prolonged.

As shown in fig. 8, in one embodiment, a through hole 119 is formed in the shutoff valve body 1, a sealing sleeve 120 and a sealing ring 121 are arranged in the through hole 119, and a motor shaft 307 of the motor 301 passes through the sealing sleeve 120 and the sealing ring 121.

The working principle of the technical scheme is as follows: a through hole 119 is formed in the shutoff valve body 1, so that a motor shaft 307 of the motor 301 can pass through the through hole 119 to drive the stud 303 to rotate, and in order to prevent a medium from leaking from the through hole 119, a sealing sleeve 120 and a sealing ring 121 are arranged in the through hole 119, so that the medium is prevented from leaking.

The beneficial effects of the above technical scheme are that: through the design of the above structure, the structure of the through hole 119, the sealing sleeve 120, the sealing ring 121, etc. is provided in this embodiment, so as to avoid the leakage of the medium caused by the through hole 119 for the motor shaft 307 to pass through.

As shown in fig. 1, in one embodiment, the lower surface of the valve plate 104 is provided with second bristles 122, and the second bristles 122 are wound around the valve seat cylinder 109.

The working principle of the technical scheme is as follows: due to the design of the circular cross plate 113 and the circular cross ring 114, the valve seat cylinder 109 does not abut against and clamp the airbag mechanism 2 upwards, that is, the valve plate 104 is not rotated to contact the valve seat 106 by an operator, that is, there is no contact between the lower surface of the valve plate 104 and the upper surface of the valve seat 106, and there is a gap, and some media, such as water, may accumulate between the bottom of the valve seat cylinder 109 and the upper surface of the valve seat 106, so the second bristles 122 are disposed on the lower surface of the valve plate 104, and the second bristles 122 are wound around the valve seat cylinder 109, and when the valve plate 104 rotates downwards, the second bristles 122 may clean the impurities, and damage to the valve seat cylinder 109 is avoided.

The beneficial effects of the above technical scheme are that: through the design of above-mentioned structure, be provided with second brush hair 122 in the lower surface of valve plate 104 in this embodiment, second brush hair 122 can clear away impurity, avoids producing the harm to valve seat section of thick bamboo 109, prolongs the life of valve seat section of thick bamboo 109.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

While embodiments of the invention have been disclosed above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims

1. A self-pressure sealing shut-off valve comprising:

the stop valve comprises a stop valve body (1), a valve cover (102) is arranged at the upper end of the stop valve body (1), a valve rod (103) is arranged on the valve cover (102) in a rotating mode, the lower end of the valve rod (103) penetrates through the valve cover (102) and extends into the stop valve body (1), a valve plate (104) is connected to the lower end of the valve rod (103), a water inlet cavity (105) is formed in the left side of the stop valve body (1), a valve seat (106) is formed in the middle of the stop valve body, a water outlet cavity is formed in the right side of the stop valve body, an inner threaded hole (107) is formed in the lower surface of the valve plate (104), a first inner groove (108) is formed in the inner top surface of the inner threaded hole (107), the inner diameter of the first inner groove (108) is larger than the inner diameter of the inner threaded hole (107), an air bag mechanism (2) is arranged in the first inner groove (108), a valve seat barrel (109, so that the valve plate (104) is selectively connected with the valve seat cylinder (109) in a sealing way.

2. A self-pressure sealing shut-off valve according to claim 1, characterized in that the upper end of the valve seat cylinder (109) is provided with an extension cylinder (110), the outer surface of the extension cylinder (110) is provided with a plurality of first annular grooves (111), the air bag mechanism (2) is in an inverted U-shape, the inner surface of which is provided with an annular projection strip (201) corresponding to the first annular grooves (111), so that the plurality of first annular grooves (111) and the plurality of annular projections (201) are in snap-fit connection.

3. A self-pressure-sealing shut-off valve according to claim 2, characterized in that the airbag mechanism (2) comprises an airbag body (21) and a support mechanism (22), the support mechanism (22) being provided in the airbag body (21), the support mechanism (22) comprising a first support cover (221), a second support cover (222), a plurality of first springs (223), and a plurality of second springs (224), the second support cover (222) being provided in the first support cover (221), the annular projection (201) being provided on an inner wall of the second support cover (222), the first support cover (221), the second support cover (222) being each made of a memory metal, the plurality of first springs (223) being provided between an upper top surface of the second support cover (222) and a lower top surface of the first support cover (221), the second springs (224) being provided between a side wall of the second support cover (222) and the first support cover (222), the plurality of first springs (223) being provided between a side wall of the second support cover and the first support cover (221) (221) Between the side walls.

4. The self-pressure sealing stop valve according to claim 3, characterized in that the bag mechanism (2) further comprises a pressing member, the pressing member comprises a pre-pressing plate (225) and a third spring (226), the inner top surface of the first inner groove (108) is provided with a pre-pressing hole (112), the pre-pressing plate (225) is arranged on the upper top surface of the airbag body (21), and the third spring (226) is arranged in the pre-pressing hole (112) and is connected with the pre-pressing plate (225) in a pressing manner.

5. The self-pressure sealing stop valve according to claim 1, characterized in that a cross circular plate (113) is arranged between the valve plate (104) and the valve rod (103), a cross baffle ring (114) is arranged on the inner wall of the stop valve body (1) above the valve seat (106), the diameter of the cross circular plate (113) is larger than the inner diameter of the cross baffle ring (114), the inner diameter of the cross baffle ring (114) is larger than the maximum diameter of the valve plate (104), the upper surface of the cross baffle ring (114) is provided with a plurality of second annular grooves, the lower surface of the cross circular plate (113) is provided with a plurality of third annular grooves, a first sealing ring (115) is arranged in the third annular grooves, the first sealing ring (115) has an annular cavity, an inner annular pipe (116) is arranged in the annular cavity, and the inner annular pipe (116) is made of memory metal, such that the first seal ring (115) is coupled within the second annular groove.

6. The self-pressure sealing stop valve according to claim 1, characterized in that the stop valve body (1) is matched with an impurity removing device, the impurity removing device comprises a motor casing (301), a motor (302), a screw rod (303), an impurity removing circular plate (304) and a support rod (305), a left groove (117) is arranged on a left base of the valve seat (106), the left groove (117) is arranged on the left surface of the left base, an internal thread and a vertical check ring (118) are arranged on the inner wall of the water inlet cavity (105), the vertical check ring (108) is arranged at the left end of the water inlet cavity (105), the internal thread is arranged at the right side of the vertical check ring (118), the support rod (305) is arranged in the vertical check ring (118), the left end of the screw rod (303) is rotatably connected with the support rod (305), and the right end is rotatably connected with the inner bottom surface of the left groove (117), the motor shell (301) is arranged on the stop valve body (1), the motor (302) is arranged in the motor shell (301), and a motor shaft (307) of the motor (302) penetrates through the stop valve body (1) and extends into the left groove to be connected with the screw rod (303) in a rotating mode;

edulcoration plectane (304) are including outer circle (308), interior plectane (309) spiro union is in on double-screw bolt (303) and with the inner wall spiro union of intake antrum (105), the left surface of interior plectane (309) be provided with erect second sealing washer (310) that retaining ring (118) correspond, outer circle (308) set up on the right surface of interior plectane (309), be provided with a plurality of second inner groovies (311) on outer circle (308), be provided with edulcoration portion in second inner groovy (311).

7. The self-pressure seal shut-off valve according to claim 6, wherein the trash removal portion comprises first bristles (312), a support block (313), and a corrugated plate (314), the corrugated plate (314) and the support block (313) are arranged in the second inner groove (311), the first bristles (312) are arranged on the support block (313), the corrugated plate (314) selectively abuts against the support block (313), and the corrugated plate (313) is made of memory metal.

8. The self-pressure sealing stop valve according to claim 6, characterized in that a through hole (119) is formed in the stop valve body (1), a sealing sleeve (120) and a sealing ring (121) are arranged in the through hole (119), and a motor shaft (307) of the motor (301) penetrates through the sealing sleeve (120) and the sealing ring (121).

9. A self-pressure sealing shut-off valve according to claim 5, characterised in that the lower surface of the valve plate (104) is provided with second bristles (122), the second bristles (122) being arranged around the valve seat cylinder (109).