阅读说明：本技术 一种扩张式手动球阀 (Expansion type manual ball valve ) 是由 商喆威 周清平 吴小兰 任奇 赵广坡 冯浩靓 于 2019-08-29 设计创作，主要内容包括：本发明公开了一种扩张式手动球阀,包括阀座、阀体和阀杆,阀座上设有阀孔,所述阀体内设有通孔和扩张空腔,通孔与扩张空腔连通,通孔贯穿阀体,阀杆一端穿过阀座和阀体伸入扩张空腔内,阀杆可相对阀体上下移动,阀体上设有锁紧销,锁紧销穿过阀体并一端与阀杆接触；扩张空腔的两侧各设有一个瓣球,扩张空腔由瓣球和阀体共同围成,瓣球的一端与阀体滑动连接,瓣球的球面与阀座适配；扩张空腔内设有可向两侧扩张的扩张支杆,扩张支杆的两端分别与两个瓣球铰接,扩张支杆的中部与阀杆铰接。本发明提供了一种扩张式手动球阀,可以在球阀关断的时候可以进行双向密封,对上下游都有介质压力的环境起到很好的保护作用,密封效果更好。(The invention discloses an expansion type manual ball valve which comprises a valve seat, a valve body and a valve rod, wherein a valve hole is formed in the valve seat, a through hole and an expansion cavity are formed in the valve body, the through hole is communicated with the expansion cavity, the through hole penetrates through the valve body, one end of the valve rod penetrates through the valve seat and the valve body and extends into the expansion cavity, the valve rod can move up and down relative to the valve body, a locking pin is arranged on the valve body, the locking pin penetrates through the valve body, and one end; the two sides of the expansion cavity are respectively provided with a flap ball, the expansion cavity is formed by the flap ball and the valve body in a surrounding way, one end of the flap ball is connected with the valve body in a sliding way, and the spherical surface of the flap ball is matched with the valve seat; the expansion cavity is internally provided with an expansion supporting rod which can be expanded towards two sides, two ends of the expansion supporting rod are respectively hinged with the two flap balls, and the middle part of the expansion supporting rod is hinged with the valve rod. The invention provides an expansion type manual ball valve which can perform bidirectional sealing when the ball valve is turned off, has a good protection effect on an environment with medium pressure at the upstream and the downstream, and has a better sealing effect.)

1. An expansion type manual ball valve comprises a valve seat, a valve body and a valve rod, wherein a valve hole is formed in the valve seat; the two sides of the expansion cavity are respectively provided with a flap ball, the expansion cavity is formed by the flap ball and the valve body in a surrounding way, one end of the flap ball is connected with the valve body in a sliding way, and the spherical surface of the flap ball is matched with the valve seat; the expansion cavity is internally provided with an expansion supporting rod which can be expanded towards two sides, two ends of the expansion supporting rod are respectively hinged with the two flap balls, and the middle part of the expansion supporting rod is hinged with the valve rod.

2. An expanding manual ball valve as claimed in claim 1 wherein the expanding struts include two support rods, one corresponding to each of the petal balls, one end of each support rod being hinged to the valve stem and the other end of each support rod being hinged to the corresponding petal ball.

3. The manual expansion ball valve of claim 2, wherein a compression member is disposed at an end of the valve stem located in the expansion cavity, the compression member is rotatably connected to the valve stem, the support rod is connected to the valve stem via the compression member, and the support rod is hinged to the compression member; the valve rod is connected with the valve body through threads.

4. The expanding manual ball valve of claim 1, wherein the valve stem has an expanding detent, the expanding detent opposing the locking pin when the flapper ball expands.

5. The expanding manual ball valve of claim 1, wherein the valve stem has a converging detent, the converging detent opposing the locking pin when the flapper ball is converging.

6. An expanding manual ball valve as claimed in claim 1, 2, 3, 4 or 5 wherein the locking pin is slidably connected to the valve body, the valve body is provided with a telescopic spring, one end of the telescopic spring is connected to the valve body, and the other end of the telescopic spring is connected to the valve stem.

7. An expanding manual ball valve as claimed in claim 6 wherein the end of the locking pin remote from the valve stem is provided with an operating block which is secured to the locking pin.

8. An expanding manual ball valve as claimed in claim 1 or 2 or 3 or 4 or 5 wherein said locking pin is threadably connected to the valve body.

9. An expansion type manual ball valve according to claim 1, 2, 3, 4 or 5, wherein a limiting block is arranged on the valve rod and is arranged outside the valve body; and a handle is arranged at one end of the valve rod, which is positioned outside the expansion cavity, and the handle is fixed and vertical to the valve rod.

10. An expanding manual ball valve as claimed in claim 1, 2, 3, 4 or 5 wherein the valve body is provided with a connecting block, the connecting block is fixed with the valve body, the valve ball is matched with the connecting block, and the valve ball is connected with the connecting block in a sliding manner.

Technical Field

The invention relates to the technical field of ball valves, in particular to an expansion type manual ball valve.

Background

The ball valve can be divided into a floating ball valve and a fixed ball valve according to different fixing modes of the ball body. In a general conventional floating ball valve, a ball floats and is sealed by being attached to a downstream valve seat under the action of upstream medium pressure, namely, the so-called post-valve sealing; the fixed ball valve has the advantages that the fixed ball valve is fixed, the valve seat is floating and is acted by media, the upstream valve seat is attached to the ball body for sealing, namely, the valve front sealing is realized, the two sealing modes can only realize one-way sealing, the media on the upstream and the downstream of the ball valve can not be guaranteed to keep a pressure environment, and the sealing effect is not ideal. And the two ball valve types are difficult to realize the function of bidirectional simultaneous sealing before and after the valve. Therefore, a ball valve which can simultaneously shut off the upstream and downstream channels to achieve the effect of bidirectional sealing is needed to be invented, and the ball valve can play a good protection role in the environment with medium pressure on the upstream and downstream.

Chinese patent application publication No. CN203627878U, published as 2014, 06, 04, entitled "an orbital ball valve", discloses an orbital ball valve, which comprises a valve body (1), a valve core (2), a valve rod (3), and a valve cover (4). The inner circumference of the upper end of the valve body (1) is symmetrically provided with a fan-shaped groove (1-1) and a guide groove (1-2), the center of the bottom of the valve body (1) is provided with a supporting hole (1-3), the lower end of the valve core (2) is provided with a supporting shaft (13), the supporting shaft (13) is arranged in the supporting hole (1-3), and the valve core (2) can rotate around the supporting shaft (13) relatively; the upper end of the valve core (2) is provided with a control hole (2-1), the lower end of the valve rod is provided with an inclined plane (3-1), and the inclined plane at the lower end of the valve rod (3) extends into the control hole (2-1) at the upper end of the valve core (2); a guide disc (10) is fixedly arranged on the valve rod (3), bosses (10-2) are symmetrically arranged on the guide disc (10), and the guide disc (10) moves in a fan-shaped groove (1-1) or a guide groove (1-2) on the valve body through the bosses (10-2); the upper end of the valve rod (3) is connected with a valve rod nut (8), and the top end of the valve rod nut (8) is fixedly connected with a hand wheel (7). This patent utilizes positioning disk and guide way to control the action of ball core, simple structure opens and close frictionless, and sealed long-lived, the reliability is high. However, the technical scheme in the patent still can only seal the front side or the rear side of the valve, and can not seal in two directions.

Disclosure of Invention

The invention provides an expansion type manual ball valve, aiming at overcoming the defect that the ball valve in the prior art can only seal one side, the expansion type manual ball valve can perform bidirectional sealing when the ball valve is turned off, has a good protection effect on the environment with medium pressure at the upstream and the downstream, and has a better sealing effect.

In order to achieve the purpose, the invention adopts the following technical scheme:

an expansion type manual ball valve is provided,

the valve comprises a valve seat, a valve body and a valve rod, wherein a valve hole is formed in the valve seat, and the valve is characterized in that a through hole and an expansion cavity are formed in the valve body, the through hole is communicated with the expansion cavity, the through hole penetrates through the valve body, one end of the valve rod penetrates through the valve seat and the valve body and extends into the expansion cavity, the valve rod can move up and down relative to the valve body, a locking pin is arranged on the valve body, the locking pin; the two sides of the expansion cavity are respectively provided with a flap ball, the expansion cavity is formed by the flap ball and the valve body in a surrounding way, one end of the flap ball is connected with the valve body in a sliding way, and the spherical surface of the flap ball is matched with the valve seat; the expansion cavity is internally provided with an expansion supporting rod which can be expanded towards two sides, two ends of the expansion supporting rod are respectively hinged with the two flap balls, and the middle part of the expansion supporting rod is hinged with the valve rod.

Preferably, the expansion support rod comprises two support rods, the support rods correspond to the valve balls one to one, one end of each support rod is hinged to the corresponding valve rod, and the other end of each support rod is hinged to the corresponding valve ball.

In the technical scheme, one end of the valve ball matched with the valve seat is provided with a sealing structure. When the valve needs to be locked, the two valve balls are aligned to the two valve holes of the valve seat, the valve rod is moved, the two support rods are outwards expanded, the two valve balls are simultaneously contacted with the valve seat and pressed tightly, and the valve holes in the valve seat are sealed by the valve balls, so that the function of bidirectional simultaneous sealing before and after the valve is realized; when the manual ball valve needs to be opened, the valve rod is moved to enable the supporting rod to retract, the two valve balls contract under the action of the supporting rod and are separated from the valve seat, the valve rod is tightly ejected by the locking pin, the valve rod cannot move relative to the valve body, then the valve rod is rotated to enable the valve body and the valve rod to rotate together, after the valve body rotates 90 degrees, the through hole in the valve body is right aligned to the valve hole in the valve seat, and the manual ball valve is completely opened. Above-mentioned technical scheme accessible expanding spheroid compresses tightly the sealed face of valve seat to shut off the upstream and downstream passageway, reach two-way sealed effect.

Preferably, a pressing piece is arranged at one end of the valve rod, which is positioned in the expansion cavity, the pressing piece is rotatably connected with the valve rod, the supporting rod is connected with the valve rod through the pressing piece, and the supporting rod is hinged with the pressing piece; the valve rod is connected with the valve body through threads. The structure realizes the relative movement of the valve rod and the valve body through the bolt connection, so that the valve rod can move more stably, and the pressing force of the supporting rod to the valve ball can be larger, thereby ensuring the sealing effect.

Preferably, the valve rod is provided with an expansion positioning groove, and when the valve ball expands, the expansion positioning groove is opposite to the locking pin. The expansion positioning groove can stretch the locking pin into the expansion positioning groove for one section when the support rod is propped to a proper position, and the relative position of the valve rod is locked. The locking pin can be prevented from being directly contacted and pressed with the side face of the valve rod, the side face of the locking pin is damaged, burrs are generated, the use of the valve rod is influenced, and the phenomenon of looseness when the pressing force is too small can be avoided.

Preferably, the valve rod is provided with a contraction positioning groove, and when the valve ball contracts, the contraction positioning groove is opposite to the locking pin. The shrink constant head tank can arrive after the bracing piece shrink, stretch into shrink constant head tank with the fitting pin one section in, lock the relative position of valve rod. The locking pin can be prevented from directly contacting the side face of the valve rod at one end to damage the side face of the valve rod, burrs are generated to influence the use of the valve rod, and the phenomenon of looseness when the pressing force is too small can be avoided.

Preferably, the locking pin is connected with the valve body in a sliding mode, the valve body is provided with a telescopic spring, one end of the telescopic spring is connected with the valve body, and the other end of the telescopic spring is connected with the valve rod. The structure can be after the valve rod moves in place, automatic with the fitting pin card in expand constant head tank or shrink constant head tank, when needing the unblock outwards extract a section distance with the fitting pin can.

Preferably, one end of the locking pin, which is far away from the valve rod, is provided with an operation block, and the operation block is fixed with the locking pin. The operation block can facilitate the pulling out of the locking pin.

Preferably, the valve rod is provided with a limiting block, and the limiting block is arranged on the outer side of the valve body. The limiting block can limit the moving position of the valve rod, and the valve rod can be prevented from excessively extending into the valve body to damage all parts.

Preferably, the locking pin is in threaded connection with the valve body. The structure can make the locking pin stably lock the valve rod.

Preferably, a handle is arranged at one end of the valve rod, which is positioned outside the expansion cavity, and the handle is fixed and vertical to the valve rod. The handle facilitates rotation of the valve stem.

Preferably, the valve body is provided with a connecting block, the connecting block is fixed with the valve body, the valve ball is matched with the connecting block, and the valve ball is connected with the connecting block in a sliding mode. The structure can reduce the processing degree of difficulty of disk seat, makes the translation of lamella ball more stable simultaneously.

The invention has the beneficial effects that: (1) when the ball valve is turned off, the ball valve can be sealed in two directions; (2) the locking pin is convenient to lock and stable in locking structure.

Drawings

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

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a partial enlarged view of the portion B in FIG. 1

FIG. 4 is a schematic structural view of embodiment 2.

In the figure: disk seat 1, valve opening 1.1, valve body 2, expansion cavity 2.1, through-hole 2.2, valve rod 3, expansion constant head tank 3.1, shrink constant head tank 3.2, fitting pin 4, lamella ball 5, bracing piece 6, compressing tightly 7, expanding spring 8, operation piece 9, stopper 10, handle 11, connecting block 12.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.