阅读说明：本技术 一种重力助开球阀 (Gravity opening-assisting ball valve ) 是由 焦彪彪 于 2020-06-16 设计创作，主要内容包括：本发明的目的在于提供一种重力助开球阀,可借助球阀芯自身重力辅助开启,且配合球阀芯重新设计了可移动阀座结构,以实现球阀芯方便开启的同时保证足够的密封性能,包括阀体和球体,阀体上设置进流通道、出流通道和阀腔,球体上设置有过流通道且可转动的设置在阀腔内,以控制阀体进流通道和出流通道的通断；阀体进流通道和出流通道与阀腔的接合处均设置有阀座,所述阀座与球体配合实现球阀在关闭状态时的密封,阀体上部设置有阀盖,所述阀盖将球体封闭在阀腔内,球体上端连接上阀杆、球体下端连接下阀杆,所述下阀杆与阀体底部的阀杆容纳腔配合,所述上阀杆从阀盖的中心孔穿出并与把手连接。(The invention aims to provide a gravity-assisted opening ball valve which can be opened by the aid of the gravity of a ball valve core, and a movable valve seat structure is redesigned by matching with the ball valve core so as to ensure sufficient sealing performance while the ball valve core is conveniently opened; the joint of the valve body inflow channel and outflow channel and the valve cavity is provided with valve seats, the valve seats are matched with the ball body to realize sealing of the ball valve in a closed state, the upper portion of the valve body is provided with a valve cover, the ball body is sealed in the valve cavity by the valve cover, the upper end of the ball body is connected with an upper valve rod, the lower end of the ball body is connected with a lower valve rod, the lower valve rod is matched with a valve rod containing cavity at the bottom of the valve body, and the upper valve rod penetrates out of a center hole of.)

1. A gravity opening-assisting ball valve is characterized by comprising a valve body and a ball body, wherein the valve body is provided with an inflow channel, an outflow channel and a valve cavity; valve seats are arranged at the joints of the valve cavity and the inflow passage and the outflow passage of the valve body, and the valve seats are matched with the ball body to realize the sealing of the ball valve in a closed state; valve body upper portion is provided with the valve gap, the valve gap seals the spheroid in the valve pocket, and the upper end of spheroid connects upper valve rod, spheroid lower extreme and connects lower valve rod, the cavity cooperation is held with the valve rod of valve body bottom to lower valve rod, realizes spheroidal location, go up the valve rod and wear out and be connected with the handle from the centre bore of valve gap, through the spheroidal rotation of handle drive, go up and still be provided with seal structure between valve rod and the valve gap, seal structure realizes going up the sealed between valve rod and the valve gap, and the valve gap top still is provided with the gland, the gland is used for right seal structure location and lead to last valve rod when last valve rod rotates, prevent rocking of going up the valve.

2. The ball valve according to claim 1, further characterized in that the valve stem receiving cavity at the bottom of the valve body is a cylindrical structure, the upper end of the cylindrical structure protrudes out of the inner bottom surface of the valve body, the upper end surface of the cylindrical structure forms an annular first curved surface, the first curved surface is an annular curved surface which smoothly transitions in the annular direction to form two recesses, the two recesses are symmetrically arranged, and two smooth cam surfaces are symmetrically arranged between the two recesses; the lower valve rod main body of the sphere is cylindrical, the lower valve rod is inserted into the valve rod accommodating cavity, so that the sphere can rotate around the central line of the lower valve rod as an axis, the diameter of a connecting section of the lower valve rod and the sphere is larger than that of the lower valve rod, the lower surface of the connecting section forms an annular second curved surface, the second curved surface is also in smooth transition along the annular direction to form two recesses, the two recesses are symmetrically arranged, and two smooth cam surfaces are symmetrically arranged between the two recesses; the highest positions of the cam surfaces of the first curved surface and the second curved surface extend to form a small section of plane along the annular direction.

3. The ball valve according to claim 1 or 2, further characterized in that the valve seat is of a T-shaped structure as a whole, the front end of the valve seat is abutted against the ball body to form a hard sealing surface, an arc-shaped groove is formed in the end surface of the valve seat corresponding to the position of the hard sealing surface, so that two narrow sealing surfaces are formed between the valve seat and the ball body, a disc spring is arranged between the valve seat and the inner wall surface of the valve cavity of the valve body, a slit slightly inclined to the radial direction of the valve seat is further formed in the valve seat between the disc spring and the arc-shaped groove, and the depth of the slit extends inwards from the outer end surface with the largest diameter of the valve seat to be smaller than the inner diameter of the inflow;

one end of the valve seat, which is far away from the ball body, is pressed and fixed on the inner wall of the inflow channel or the outflow channel by the valve seat fixing piece in the inflow channel or the outflow channel, the valve seat and the valve seat fixing piece form step fit, and a sealing lip is arranged between the valve seat and the valve seat fixing piece; and a spring is also arranged between the rear section of the valve seat retainer and the valve body.

4. The ball valve of claim 3, further characterized in that a fine sealing ring is disposed between the sealing lip and the valve body.

5. The ball valve according to claim 1, wherein the sealing structure is a plurality of sealing rings sleeved on the upper valve rod, and a plurality of annular grooves are formed on the inner circumferential surface of each sealing ring.

6. The ball valve according to claim 1, further characterized in that a strip-shaped groove is formed in the side circumferential surface of the lower valve rod, and the strip-shaped groove is used for scraping impurities entering the valve rod accommodating cavity into the strip-shaped groove when the ball rotates.

7. The ball valve of claim 1, further characterized in that a compression spring is disposed between the ball body and the valve cover, the compression spring providing a tendency to depress the ball body.

Technical Field

The invention belongs to the technical field of valves, and particularly relates to a gravity-assisted opening ball valve.

Background

The problem of difficult opening of industrial valves is one of the difficult problems which puzzles the field of valves for a long time, the valve controls the industrial pipeline to play important roles of raw material conveying, reaction cutting, pressure control and the like, but because the fluid in the pipeline often has high pressure, the hydraulic pressure can tightly press the closed valve on a valve seat, although the sealing is facilitated, the friction force between a valve core and the valve seat is correspondingly greatly increased, so that the valves of various types have the problem of difficult opening. In particular, in a large-sized valve, for example, a ball valve for controlling a large-diameter large-flow pipeline, because the valve has a large volume, the valve core of the ball valve has a large weight, and the force-bearing surface of the liquid pressure is also large, the opening of the large-sized ball valve is more difficult.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a gravity-assisted opening ball valve which can be opened by means of the gravity of a ball valve core, and a movable valve seat structure is redesigned by matching with the ball valve core, so that the ball valve core can be conveniently opened and meanwhile, the sufficient sealing performance is ensured.

The technical scheme adopted by the invention is as follows: a gravity opening-assisting ball valve is characterized by comprising a valve body and a ball body, wherein the valve body is provided with an inflow channel, an outflow channel and a valve cavity; valve seats are arranged at the joints of the valve cavity and the inflow passage and the outflow passage of the valve body, and are matched with the ball body to realize the sealing of the ball valve in a closed state so as to prevent fluid from leaking downstream; valve body upper portion is provided with the valve gap, the valve gap seals the spheroid in the valve pocket, and the upper end of spheroid connects upper valve rod, spheroid lower extreme and connects lower valve rod, the cavity cooperation is held with the valve rod of valve body bottom to lower valve rod, realizes spheroidal location, go up the valve rod and wear out and be connected with the handle from the centre bore of valve gap, through the spheroidal rotation of handle drive, go up and still be provided with seal structure between valve rod and the valve gap, seal structure realizes going up the sealed between valve rod and the valve gap, and the valve gap top still is provided with the gland, the gland is used for right seal structure location and lead to last valve rod when last valve rod rotates, prevent rocking of going up the valve.

The valve rod accommodating cavity at the bottom of the valve body is of a cylindrical structure, the upper end of the cylindrical structure protrudes out of the inner bottom surface of the valve body, the upper end surface of the cylindrical structure forms an annular first curved surface, the first curved surface is an annular curved surface which forms two recesses along the annular direction in a smooth transition mode, the two recesses are symmetrically arranged, and two smooth cam surfaces which are symmetrically arranged are arranged between the two recesses; the lower valve rod main body of the sphere is cylindrical, the lower valve rod is inserted into the valve rod accommodating cavity, so that the sphere can rotate around the central line of the lower valve rod, the diameter of the connecting section of the lower valve rod and the sphere is larger than that of the lower valve rod, the lower surface of the connecting section forms an annular second curved surface, the diameter of the outer ring of the second curved surface is basically the same as that of the outer ring of the first curved surface, the second curved surface is also smoothly transited along the annular direction to form two recesses, the two recesses are symmetrically arranged, and two smooth cam surfaces which are symmetrically arranged are arranged between the two recesses; the highest positions of the cam surfaces of the first curved surface and the second curved surface extend to form a small section of plane along the annular direction.

When the ball body is assembled in the valve cavity, the second curved surface is matched with the first curved surface, when the ball body is in a closed state, the two cam surfaces of the first curved surface are matched with the two cam surfaces of the second curved surface, the plane positions of the two cam surfaces of the second curved surface are pressed on the plane positions of the two cam surfaces of the first curved surface, so that the ball body is kept in a stable closed state, when will open the ball valve, operating handle rotates the spheroid, and the second curved surface of spheroid bottom and the first curved surface that the valve rod held the chamber up end take place relative rotation, and the cam surface of second curved surface rotates the sunk position department to first curved surface, and the spheroid has the trend of gliding to sunken deepest along the first curved surface is level and smooth under self action of gravity, and when the gliding is rotated along annular first curved surface to the second curved surface, can drive below the spheroid the valve rod take place to rotate for the axis to open the ball valve.

The valve seat is integrally of a T-shaped structure, the front end of the valve seat is abutted with a ball body to form a hard sealing surface, an arc-shaped groove is formed in the end face of the valve seat at the position corresponding to the hard sealing surface, two narrow sealing surfaces are formed between the valve seat and the ball body, a disc spring is arranged between the valve seat and the inner wall face of a valve cavity of the valve body and provides a moving trend of pressing the valve seat to the ball body, a slit slightly inclined to the radial direction of the valve seat is further formed in the valve seat between the disc spring and the arc-shaped groove, and the depth of the slit extends inwards from the outer end face with the largest diameter of the valve seat to be smaller than the inner diameter of an inflow channel or an. The slit is formed, so that the valve seat part which is positioned in the valve cavity and has the diameter larger than that of the inflow channel or the outflow channel has the elasticity larger than that of the valve seat material, when the ball body rotates and cooperates with the first curved surface and the second curved surface to generate small-amplitude descending or ascending displacement, the valve seat part can be enabled to be narrow to ensure that the valve seat part is kept sealed under the condition that the valve seat part is not damaged due to pressure. One end of the valve seat, which is far away from the ball body, is pressed and fixed on the inner wall of the inflow channel or the outflow channel by the valve seat fixing piece in the inflow channel or the outflow channel, the valve seat and the valve seat fixing piece form step fit, and a sealing lip is arranged between the valve seat and the valve seat fixing piece; and a spring is arranged between the rear section of the valve seat retainer and the valve body and provides a movement trend for pushing the valve seat retainer to the ball body direction. And a fine sealing ring is also arranged between the sealing lip and the valve body.

Go up still to be provided with seal structure between valve rod and the valve gap, a plurality of sealing rings on last valve rod are established for the cover to seal structure, set up multichannel annular on the sealing ring inner peripheral surface, the annular forms labyrinth between the inner peripheral surface of a plurality of sealing rings and last valve rod surface, prevents revealing of the inside liquid of valve body.

The bar groove has been seted up on the side global of lower valve rod, the bar groove is arranged in will entering into the valve rod when the spheroid rotates and hold the intracavity portion impurity and scrape into the bar groove to follow bar groove landing to the valve rod and hold the chamber bottommost, in order to avoid influencing spheroidal normal rotation, the valve rod holds the bottom in chamber and can also set up the detachable bottom, with regularly discharge impurity and be used for observing whether the spheroid has produced and has revealed.

A pressure spring is further arranged between the ball body and the valve cover and provides a trend of pressing the ball body downwards so that the ball body can smoothly overcome the friction force between the ball body and the valve seat when rotating and can rotate to an opening position.

The invention has the advantages that:

1. through the arrangement of the first curved surface and the second curved surface, the ball body has downward sliding displacement amplitude in the rotating and opening process, so that the ball body can be opened by the aid of the gravity of the ball body, the opening difficulty of the ball valve is reduced, and particularly the opening difficulty of a large ball valve which is difficult to open by means of tools is reduced;

2. a pressure spring is arranged between the ball body and the valve cover, and the ball valve can smoothly rotate and slide downwards along the first curved surface in the opening process of the ball valve by means of the elasticity of the pressure spring, so that the ball valve can be conveniently opened;

3. when the valve seat and the ball body are sealed and leaked, high-pressure liquid leaked into the valve cavity enters the slit to press the side wall of the slit tightly to press the valve seat part between the slit and the ball body to the ball body, so that the self-pressure reinforced sealing by the leaked liquid is realized, and the liquid is prevented from being continuously leaked;

4. the bar-shaped groove is formed in the side circumferential surface of the lower valve rod, impurities entering the valve rod accommodating cavity can be scraped into the bar-shaped groove when the ball rotates, and therefore the ball is guaranteed to normally rotate all the time.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the overall structure of the present invention;

FIG. 3 is a schematic view of the valve seat structure of the present invention;

FIG. 4 is a schematic view of the seal lip configuration of the present invention;

FIG. 5 is a schematic view of the valve body of the present invention;

FIG. 6 is a schematic diagram of a sphere structure of the present invention;

FIG. 7 is a schematic view of the valve cover construction of the present invention;

FIG. 8 is a schematic view of a seal ring structure according to the present invention;

in the figure: 1. the valve comprises a valve body, 2, a ball body, 3, an upper valve rod, 4, a lower valve rod, 5, a valve cover, 6, a gland, 7, a valve seat, 8, a valve seat fixing piece, 9, a sealing lip, 10, a spring, 11, a disc spring, 12, a slit, 13, a first curved surface, 14, a second curved surface, 15, a strip-shaped groove, 16, a pressure spring, 17, a sealing ring, 18, a handle, 19, a fine sealing ring, 20 and an elastic ring.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the disclosure herein.

Referring to the drawings, the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present disclosure can be implemented, so that the present disclosure has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the disclosure of the present disclosure without affecting the efficacy and the achievable purpose of the present disclosure. Meanwhile, the positional limitation terms used in the present specification are for clarity of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship therebetween may be regarded as the scope of the present invention without substantial changes in the technical content.

FIG. 1 is a schematic diagram of the overall structure of the present invention, FIG. 2 is a schematic diagram of a cross-sectional view of the overall structure of the present invention, and as shown in the drawings, the gravity assisted ball valve of the present invention comprises a valve body 1 and a ball body 2, wherein the valve body 1 is provided with an inflow channel, an outflow channel and a valve cavity, and the ball body 2 is provided with an outflow channel and is rotatably disposed in the valve cavity to control the on-off of the inflow channel and the outflow channel of the valve body; valve seats 7 are arranged at joints of the valve cavity and the inflow passage and the outflow passage of the valve body, and the valve seats 7 are matched with the ball body 2 to realize sealing of the ball valve in a closed state and prevent fluid from leaking downstream; 1 upper portion of valve body is provided with valve gap 5, valve gap 5 seals spheroid 2 in the valve pocket, and the upper end of spheroid 2 is connected and is connected valve rod 3, spheroid 2 lower extreme and connect lower valve rod 4, the valve rod of lower valve rod 4 and 1 bottom of valve body holds the chamber cooperation, realizes spheroid 2's location, go up valve rod 3 and wear out and be connected with handle 18 from the centre bore of valve gap 5, through the rotation of handle 18 drive spheroid 2, go up and still be provided with seal structure between valve rod 3 and the valve gap 5, seal structure realizes going up the sealed between valve rod 3 and the valve gap 5, and valve gap 5 top still is provided with gland 6, gland 6 is used for right seal structure location and lead to last valve rod when last valve rod rotates, prevent rocking of going up the valve rod.

The sealing structure is a plurality of sealing rings 17 sleeved on the upper valve rod 3, in the embodiment, the number of the sealing rings is three, as shown in fig. 8, the sealing structure is a schematic view of the sealing ring structure of the present invention, a plurality of annular grooves are formed on the inner circumferential surface of the sealing rings 17, and the annular grooves form labyrinth seals between the inner circumferential surfaces of the plurality of sealing rings 17 and the outer surface of the upper valve rod 3, so as to prevent liquid inside the valve body from leaking.

Fig. 3 is a schematic diagram of a valve seat structure of the present invention, as shown in the figure, the valve seat 7 of the present invention is a T-shaped structure as a whole, the front end of the valve seat is abutted against the ball 2 to form a hard sealing surface, an arc-shaped groove is arranged on the end surface of the valve seat corresponding to the position of the hard sealing surface, so that two narrow sealing surfaces are formed between the valve seat 7 and the ball 2, a disc spring 11 is arranged between the valve seat 7 and the inner wall surface of the valve cavity of the valve body 1, the disc spring 11 provides a moving tendency of pressing the valve seat 7 towards the ball 2, a slit 12 slightly inclined to the radial direction of the valve seat is further arranged on the valve seat 7 between the disc spring 11 and the arc-shaped groove, and the depth of the slit 12 extends inwards from the outer end surface with the; the slit 12 is opened to enable the valve seat portion, which is positioned in the valve cavity and has a diameter larger than that of the inflow channel or the outflow channel, to have an elastic force larger than that of the valve seat material, and when the ball 2 rotates and cooperates with the first curved surface 13 and the second curved surface 14 to generate a slight descending or ascending displacement, the valve seat portion can be ensured not to be damaged due to pressure and can continuously maintain sealing by narrowing the slit 12. One end, far away from the ball body 2, of the valve seat 7 is pressed and fixed on the inner wall of the inflow channel or the outflow channel by a valve seat fixing piece 8 in the inflow channel or the outflow channel, the valve seat 7 and the valve seat fixing piece 8 form step fit, and a sealing lip 9 is arranged between the valve seat 7 and the valve seat fixing piece 8; a spring 10 is also arranged between the rear end of the seat holder 8 and the valve body 1, said spring 10 providing a tendency to move the seat holder 8 in the direction of the ball 2.

As shown in fig. 4, which is a schematic structural diagram of the sealing lip of the present invention, the sealing lip 9 has an open ring-shaped main body made of an elastic material and an elastic ring 20 disposed inside the main body, the elastic ring 20 expands the main body to two sides to realize sealing between the valve seat 7 and the valve seat fixing member 8, and a fine sealing ring 19 is further disposed between the sealing lip 9 and the valve body 1.

Fig. 5 is a schematic structural diagram of a valve body of the present invention, fig. 6 is a schematic structural diagram of a sphere of the present invention, as shown in the figure, the valve rod receiving cavity at the bottom of the valve body 1 is a cylindrical structure, the upper end of the cylindrical structure protrudes out of the inner bottom surface of the valve body, the upper end surface of the cylindrical structure forms an annular first curved surface 13, the first curved surface 13 is an annular curved surface which forms two recesses along the annular direction in a smooth transition manner, the two recesses are symmetrically arranged, and two smooth cam surfaces which are symmetrically arranged are arranged between the two recesses; the main body of a lower valve rod 4 of the sphere 2 is cylindrical, the lower valve rod 4 is inserted into a valve rod accommodating cavity, so that the sphere 2 can rotate around the central line of the lower valve rod 4, the diameter of the connecting section of the lower valve rod 4 and the sphere 2 is larger than that of the lower valve rod 4, the lower surface of the connecting section forms an annular second curved surface 14, the diameter of the outer ring of the second curved surface 14 is basically the same as that of the outer ring of the first curved surface 13, the second curved surface 14 is also in smooth transition along the annular direction to form two recesses, the two recesses are symmetrically arranged, and two smooth cam surfaces are symmetrically arranged between the two recesses; the highest positions of the cam surfaces of the first curved surface 13 and the second curved surface 14 extend to form a small section of plane along the annular direction, and when the sphere 2 is in a closed state, the plane of the first curved surface 13 is matched with the plane of the second curved surface 14, so that the sphere is in a stable closed state.

Fig. 7 is a schematic structural diagram of the valve cover of the present invention, as shown in the figure, a cylinder section extending to a certain height is arranged in the center of the upper surface of the valve cover 5, a flange is arranged at the top of the cylinder section, the flange is connected with the gland 6 in a matching manner, and a plurality of bolt holes are further arranged in an annular array around the valve cover 5, and the bolt holes are used for fixedly connecting the valve cover and the valve body.

The working process of the invention is explained below with reference to the drawings as follows: when the ball valve is in a closed state, the flow passage of the ball body 2 is perpendicular to the axis of the flow inlet passage of the valve body 1 so as to block liquid flow, at the moment, the plane of the first curved surface 13 is matched with the plane of the second curved surface 14 to enable the ball body to be in a stable closed state, and the horizontal center line of the ball body 2 is consistent with the horizontal center line of the valve seat 7; when the ball valve is opened, the operating handle 18 rotates the ball body 2, firstly, the plane of the second curved surface 14 below the ball body 2 is rotated by a small angle to be separated from the plane of the first curved surface 13, so that the cam surface of the second curved surface 14 rotates and slides to the initial position of the depression of the first curved surface, under the action of the self gravity of the ball body 2 and the elastic force of the pressure spring 16, the ball body 2 has the tendency of sliding downwards to the deepest part of the depression along the depression of the first curved surface 11, the ball body 2 can be driven to rotate in the sliding process, the external force required to be applied for rotating the ball body is reduced, and when the cam surface of the second curved surface 14 is completely matched with the depression of the first curved surface 13, the;

in the process, the ball 2 slightly moves downwards in the up-down direction, the pressure applied by the ball 2 on the lower half part of the valve seat 7 is increased, and the valve seat 7 presses the slit 12 to generate adaptive deformation, so that the valve seat structure is not damaged by overpressure.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the invention, and it should be understood by those skilled in the art that various modifications and changes in equivalent structure or equivalent flow, or direct or indirect application to other related fields without creative efforts based on the technical solutions of the present invention may be made within the scope of the present invention.