CN212177917U

CN212177917U - Corrugated pipe valve combining plane sealing and conical surface sealing

Info

Publication number: CN212177917U
Application number: CN202020944439.0U
Authority: CN
Inventors: 李金虎
Original assignee: China Tobacco Anhui Industrial Co Ltd
Current assignee: China Tobacco Anhui Industrial Co Ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2020-12-18
Anticipated expiration: 2030-05-28

Abstract

The utility model discloses a corrugated pipe valve combining plane sealing and conical surface sealing, which comprises a valve body and a valve cover, wherein the top end of the valve cover is rotatably provided with a valve rod nut, the inner thread of the valve rod nut is connected with an outer valve rod, the bottom end of the outer valve rod extends downwards into a cavity inside the valve body and is fixedly connected with a plane sealing valve core, an inner valve rod is arranged in an inner pore channel of the outer valve rod, the bottom of the inner valve rod passes through a limiting plate downwards and is connected with a corrugated pipe after being perforated, the bottom end of the corrugated pipe is connected with the conical surface sealing valve core, the top end of the inner valve rod is provided with a stress platform, the inner valve rod is sleeved with a spring, the upper end and the lower end of the spring, force is applied to the stress platform at the top of the inner valve rod through the bottom of the screw ejector rod, and a plane sealing platform and a conical surface sealing platform are arranged in the inner cavity of the valve body. The utility model has the advantages that: the integral sealing performance of the valve is improved, and the service life of the valve is prolonged.

Description

Corrugated pipe valve combining plane sealing and conical surface sealing

Technical Field

The utility model relates to a valve especially relates to a bellows valve that combines plane seal and conical surface to seal.

Background

Along with the development of society, the requirements on energy conservation, consumption reduction and process are higher and higher. The prevention of 'running, overflowing, dripping and leaking' is more and more important to the development of enterprises. The bellows valve is one of the most widely used valves, and is suitable for medium and low pressure as well as high pressure. The flat seal is most commonly used in a bellows valve, and has the advantages that no friction exists when the contact surface is sealed, so that the requirement on the guidance of a closing member is not high, and meanwhile, the sealing performance of the sealing surface cannot be influenced when the roundness of the sealing surface is stressed and deformed due to the stress of a pipeline. However, the plane sealing structure has large applied sealing force, if the plane sealing structure is used in a complex medium environment, the sealing performance cannot meet the requirement, and a great deal of manpower and financial resources are needed to replace or repair the plane sealing structure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's not enough, provide a bellows valve that combines plane seal and conical surface to prolong the life of bellows valve.

The utility model discloses a realize through following technical scheme:

a corrugated pipe valve combining plane sealing and conical surface sealing comprises a valve body and a valve cover arranged above the valve body, wherein a valve rod nut is rotatably arranged at the top end of the valve cover, the top end of the valve rod nut is fixedly connected with a hand wheel, an outer valve rod is in threaded connection with an inner threaded hole of the valve rod nut, the bottom end of the outer valve rod extends downwards into an inner cavity of the valve body and is fixedly connected with a plane sealing valve core, the outer valve rod is a hollow rod with a hole in the inner hole, an inner valve rod is arranged in the inner hole of the outer valve rod, a limiting sheet is arranged at the position, located at the bottom of the hole of the outer valve rod, of the plane sealing valve core, a through hole is formed in the center of the limiting sheet, the bottom of the inner valve rod penetrates through the through hole of the limiting sheet downwards and is connected with a corrugated pipe, the bottom end of, the valve body comprises an inner valve rod, a spring and a valve body inner cavity, wherein the inner valve rod is sleeved with the inner valve rod, the upper end and the lower end of the spring are respectively abutted and limited through a limiting baffle ring and a limiting sheet, the top of a pore passage of the outer valve rod is in threaded connection with a screw ejector rod, force is applied to a stress platform at the top of the inner valve rod through the bottom of the screw ejector rod, and the valve body inner cavity is provided with a plane sealing platform in sealing fit with the plane sealing valve core and a conical surface sealing platform.

Furthermore, the main body of the plane sealing valve core is cylindrical with an open bottom, and the plane sealing platform in the valve body is of a step structure matched with the bottom of the plane sealing valve core.

Furthermore, the conical surface sealing valve core main body is in an inverted round table shape, and the conical surface sealing table in the valve body is a conical sealing surface matched with the outer side wall of the conical surface sealing valve core.

Furthermore, the limiting sheet of the plane sealing valve core is in a spherical crown shape, the top end of the corrugated pipe is provided with a mixed flow partition plate, and the top end surface of the mixed flow partition plate is matched with the bottom wall surface shape of the limiting sheet.

Furthermore, a scale is arranged on the valve cover, the left end and the right end of the scale are respectively in sliding fit with the vertical sliding rails on the left side and the right side of the valve cover, and the scale is fixedly sleeved on the outer valve rod.

Further, the scale is formed by two petal structures in horizontal butt joint, and the connection can be dismantled through two screw realization between two petal structures, encloses into a regular hexagon's the hole of preventing changeing after two petal structures butt joint, open the outer valve rod outside has the round ring channel, the inner wall of ring channel encloses into a regular hexagon, the hole of preventing changeing of scale just in time imbeds in the ring channel of outer valve rod.

Compared with the prior art, the utility model has the following advantages:

1. the utility model provides a bellows valve that combines plane seal and conical surface seal, it combines plane seal structure and conical surface seal structure in the same valve, for plane seal, the sealed specific pressure of conical surface seal greatly increases, and the sealing force exerted is less, and the leakproofness is better; the utility model discloses combine plane seal structure and conical surface seal structure's advantage together, effectively increased the whole sealing performance of valve, prolonged the life of valve, reduced because of the maintenance or the waste of changing required manpower of valve and financial resources, saved the cost greatly.

2. The utility model provides a pair of bellows valve that combines plane seal and conical surface to seal, it adopts inside and outside valve rod structure, moves the motion that screw ejector pin can drive outer valve rod or interior valve rod through rotating the hand wheel or twisting respectively, and then realizes plane seal structure or conical surface seal structure's sealed, easy operation, convenience, swift.

3. The utility model provides a bellows valve combining plane sealing and conical surface sealing, the scaleplate of which adopts two petal-shaped structures to realize connection through screws, thus facilitating the disassembly and installation of the scaleplate; and the anti-rotation hole of the scale is embedded into the annular groove of the outer valve rod, so that the anti-rotation function between the outer valve rod and the scale is realized, the rotation of the outer valve rod is limited, and the outer valve rod can only move along the axial direction and can not rotate.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

3 fig. 3 2 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 a 3- 3 a 3 of 3 fig. 3 1 3. 3

Fig. 3 is a schematic view of the half-section structure of the present invention.

Fig. 4 is an enlarged view of fig. 3 at B.

Reference numbers in the figures: the valve comprises a valve body 1, a valve cover 2, a valve rod nut 3, a hand wheel 4, an annular clamping groove 5, a lateral hole 6, a lower limiting boss 7, an upper limiting ring 8, an outer valve rod 9, a plane sealing valve core 10, an inner valve rod 11, a limiting piece 12, a corrugated pipe 13, a conical surface sealing valve core 14, a stress platform 15, a limiting stop ring 16, a spring 17, a screw ejector rod 18, a plane sealing platform 19, a conical surface sealing platform 20, a mixed flow partition plate 21, a scale 22, a petal-shaped structure 23, a vertical sliding rail 24 and a screw 25.

Detailed Description

The embodiments of the present invention will be described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Referring to fig. 1 to 4, the embodiment discloses a corrugated pipe valve combining plane sealing and conical surface sealing, which includes a valve body 1 and a valve cover 2 disposed above the valve body 1 through screws, a stem nut 3 is rotatably mounted on the top end of the valve cover 2, the top end of the stem nut 3 is fixedly connected with a hand wheel 4, a circle of annular clamping groove 5 is formed on the outer circumference of the stem nut 3, a lateral hole 6 is formed on the side wall of the valve cover 2, and the lateral hole 6 is inserted into the lateral hole 6 of the valve cover 2 and extends into the annular clamping groove 5 of the stem nut 3 through a lateral screw to prevent the stem nut 3 from falling off. Open at valve gap 2 top has the mounting hole that link up from top to bottom, and during valve-stem nut 3 stretched into the mounting hole, 3 bottom of valve-stem nut stretched out the mounting hole downwards and was equipped with down spacing boss 7, and the position that lies in mounting hole upper portion of 3 upper segments of valve-stem nut is connected with upper limit ring 8, through upper limit ring 8 and lower spacing boss 7 and valve gap 2 cooperation, realizes the spacing to valve-stem nut 3 upper and lower position.

An outer valve rod 9 is connected with the inner thread hole of the valve rod nut 3 through a thread, the bottom end of the outer valve rod 9 extends downwards into the inner cavity of the valve body 1 and is fixedly connected with a plane sealing valve core 10, the outer valve rod 9 is a hollow rod with a hole channel arranged inside, an inner valve rod 11 is arranged in the hole channel of the outer valve rod 9, a limiting sheet 12 is arranged at the position of the bottom of the hole channel of the outer valve rod 9 of the plane sealing valve core 10, a through hole is arranged at the center of the limiting sheet 12, a corrugated pipe 13 is connected with the bottom end of the inner valve rod 11 after the bottom of the inner valve rod 11 downwards passes through the through hole of the limiting sheet 12, a conical surface sealing valve core 14 is connected with the bottom end of the corrugated pipe 13, a stress platform 15 is arranged at the top end of the inner valve rod 11, a limiting stop ring 16 is arranged at the upper section of the inner valve rod 11, a spring 17, the force is applied to the stressed platform 15 on the top of the inner valve rod 11 through the bottom of the screw ejector rod 18, and the inner cavity of the valve body 1 is provided with a plane sealing platform 19 in sealing fit with the plane sealing valve core 10 and a conical surface sealing platform 20 in sealing fit with the conical surface sealing valve core 14.

Specifically, the main body of the planar sealing valve core 10 is cylindrical with an open bottom, and the planar sealing platform 19 inside the valve body 1 is of a step structure matched with the bottom of the planar sealing valve core 10. The main body of the conical surface sealing valve core 14 is in an inverted round table shape, and the conical surface sealing table 20 in the valve body 1 is a conical sealing surface matched with the outer side wall of the conical surface sealing valve core 14.

Specifically, the limiting piece 12 of the plane sealing valve core 10 is in a spherical crown shape, the top end of the corrugated pipe 13 is provided with a mixed flow partition plate 21, and the top end surface of the mixed flow partition plate 21 is matched with the bottom wall surface shape of the limiting piece 12. When the corrugated pipe 13 is heated and expanded, the mixed flow partition plate 21 is jacked up to be tightly attached to the bottom wall surface of the limiting piece 12, and sealing of the central through hole of the limiting piece 12 is achieved.

Specifically, be equipped with scale 22 on the valve gap 2, sliding fit between scale 22 about both ends respectively and the vertical slide rail 24 of the valve gap 2 left and right sides, scale 22 is fixed the suit on outer valve rod 9. Scale 22 is formed by two petal structures 23 level butt joints, realizes dismantling the connection through two screws 25 between two petal structures 23, encloses into a regular hexagon after two petal structures 23 butt joints and prevents that the hole, and open in the outer valve rod 9 outside has the round ring channel, and the inner wall of ring channel encloses into a regular hexagon, and scale 22 prevents that the hole just in time imbeds in the ring channel of outer valve rod 9. The anti-rotation hole is designed in the shape of a regular hexagon, and can prevent relative rotation between the outer valve rod 9 and the scale 22.

When the valve is used, the handwheel 4 is rotated, the handwheel 4 drives the valve rod nut 3 to rotate, the valve rod nut 3 drives the outer valve rod 9 to lift, the separation or the contact between the plane sealing valve core 10 at the bottom end of the outer valve rod 9 and the plane sealing platform 19 of the valve body 1 is realized, and then the opening or the closing of the plane sealing structure is realized.

The screwdriver extends into the pore channel of the outer valve rod 9 and rotates the screw ejector rod 18, so that the screw ejector rod 18 moves downwards and presses the stress platform 15 at the top end of the inner valve rod 11, the inner valve rod 11 moves downwards, the spring 17 is compressed, the inner valve rod 11 drives the conical surface sealing valve core 14 to move downwards together, contact between the conical surface sealing valve core 14 and the conical surface sealing table 20 of the valve body 1 is realized, and then closing of the conical surface sealing structure is realized. And the screw ejector rod 18 is rotated reversely, so that the screw ejector rod 18 moves upwards to be separated from the stress platform 15 of the inner valve rod 11, the compressed spring 17 is released gradually, the inner valve rod 11 is driven to move upwards under the action of the spring 17, the conical surface sealing valve core 14 is separated from the conical surface sealing table 20 of the valve body 1, and then the opening of the conical surface sealing structure is realized.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a combine sealed bellows valve with conical surface of plane, includes the valve body and sets up the valve gap in the valve body top, the valve gap top is rotated and is installed a stem nut, stem nut top and hand wheel fixed connection, threaded connection has outer valve rod in stem nut's the internal thread hole, outer valve rod bottom stretches into in the inside cavity of valve body and fixedly connected with plane seal case, its characterized in that downwards: the outer valve rod is a hollow rod with a pore channel arranged inside, an inner valve rod is arranged in the pore channel inside the outer valve rod, the position of the plane sealing valve core, which is positioned at the bottom of the pore canal of the outer valve rod, is provided with a limiting sheet, the center of the limiting sheet is provided with a through hole, the bottom of the inner valve rod penetrates through the through hole of the limiting sheet downwards and then is connected with a corrugated pipe, the bottom end of the corrugated pipe is connected with a conical surface sealing valve core, the top end of the inner valve rod is provided with a stress platform, the upper section of the inner valve rod is provided with a limit stop ring, the inner valve rod is sleeved with a spring, the upper end and the lower end of the spring are respectively blocked and limited by a limiting blocking ring and a limiting sheet, the top of the pore passage of the outer valve rod is in threaded connection with a screw ejector rod, the force is applied to the stress platform at the top of the inner valve rod through the bottom of the screw ejector rod, and the inner cavity of the valve body is provided with a plane sealing platform in sealing fit with the plane sealing valve core and a conical surface sealing platform in sealing fit with the conical surface sealing valve core.

2. A bellows valve incorporating a planar seal and a conical seal as claimed in claim 1, wherein: the main body of the plane sealing valve core is cylindrical with an open bottom, and the plane sealing platform in the valve body is of a step structure matched with the bottom of the plane sealing valve core.

3. A bellows valve incorporating a planar seal and a conical seal as claimed in claim 1, wherein: the conical surface sealing valve core main body is in an inverted round table shape, and the conical surface sealing table in the valve body is a conical sealing surface matched with the outer side wall of the conical surface sealing valve core.

4. A bellows valve incorporating a planar seal and a conical seal as claimed in claim 1, wherein: the limiting piece of the plane sealing valve core is in a spherical crown shape, the top end of the corrugated pipe is provided with a mixed flow partition plate, and the top end surface of the mixed flow partition plate is matched with the bottom wall surface of the limiting piece in shape.

5. A bellows valve incorporating a planar seal and a conical seal as claimed in claim 1, wherein: the valve cover is provided with a scale, the left end and the right end of the scale are respectively in sliding fit with the vertical sliding rails on the left side and the right side of the valve cover, and the scale is fixedly sleeved on the outer valve rod.

6. A bellows valve incorporating a planar seal and a conical seal as claimed in claim 5, wherein: the scale is formed by two petal structure levels butt joint, realizes dismantling the connection through two screws between two petal structure, encloses into a regular hexagon after two petal structure butt joints and prevents that the hole, open the outer valve rod outside has the round ring channel, the inner wall of ring channel encloses into a regular hexagon, the hole that prevents of scale just in time imbeds in the ring channel of outer valve rod.