CN210196527U - Ball valve - Google Patents

Abstract

The utility model belongs to the technical field of the hydraulic pressure spare technique and specifically relates to a ball valve is related to. The ball valve comprises a valve seat with a valve cavity arranged therein and a cock ball with a flow channel arranged therein; a liquid inlet and a liquid outlet which are communicated with the valve cavity are respectively arranged at the two ends of the valve seat; the cock ball is rotatably arranged in the valve cavity and comprises two hemispheres which can approach or depart from each other; when the cock ball rotates to the first position, the liquid inlet is communicated with the liquid outlet through the flow channel; when the cock ball rotates to the second position, the two hemispheres can be mutually far away from each other and respectively correspond to the sealed liquid inlet and the sealed liquid outlet. An object of the utility model is to provide a ball valve to alleviate the easy technical problem who leaks of ball valve that exists among the prior art.

Description

Ball valve

Technical Field

The utility model belongs to the technical field of the hydraulic pressure spare technique and specifically relates to a ball valve is related to.

Background

The ball valve is mainly used for cutting off, distributing and changing the flow direction of a medium in a pipeline, and a common ball valve comprises a valve seat and a cock ball, and the cock ball is controlled by a valve rod to rotate within a range of 90 degrees left and right of a cock body so as to realize the switching action.

In the prior art, the sealing of a ball valve is realized by the following methods: a seal is provided on the valve seat to seal a gap between the valve seat and the plug body with the seal. However, during rotation of the plug body within the valve seat, the high torque increases wear between the seal and the valve seat, wherein the valve seat is worn and leakage is likely to occur when the ball valve is closed.

The present application thus provides a new ball valve that addresses the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a ball valve to alleviate the easy technical problem who leaks of ball valve that exists among the prior art.

Based on the above purpose, the utility model provides a ball valve, which comprises a valve seat with a valve cavity and a cock ball with a flow passage; a liquid inlet and a liquid outlet which are communicated with the valve cavity are respectively formed at two ends of the valve seat;

the cock ball is rotatably arranged in the valve cavity and comprises two hemispheres which can approach or depart from each other;

when the cock ball rotates to a first position, the liquid inlet and the liquid outlet are communicated through the flow channel; when the cock ball rotates to the second position, the two hemispheres can be far away from each other and respectively and correspondingly seal the liquid inlet and the liquid outlet.

Further, the device also comprises a driving device and a hinge;

the hinge comprises a first leaf and a second leaf, and the two hemispheres are respectively and correspondingly connected with the first leaf and the second leaf in a rotating manner;

the driving device is connected to the first leaf and the second leaf, can drive the cock ball to rotate in the valve cavity through the hinge, and can drive the first leaf and the second leaf to rotate so as to enable the two hemispheres to approach or move away from each other.

Further, the device also comprises a support component;

the support assembly comprises a rotating seat and a fixed seat, the rotating seat is rotatably connected to the valve seat, and the fixed seat is fixedly connected to the valve seat and is arranged on one side, away from the hinge, of the cock ball;

the two hemispheres are rotatably connected to the rotating seat, and the rotating seat is abutted against the fixed seat;

the rotating of the cock ball in the valve cavity can drive the rotating seat to rotate relative to the fixed seat; the first leaf and the second leaf can drive two hemispheres to be close to one side of the hinge or be far away from each other, and two hemispheres are far away from one side of the hinge and are opposite to the rotary seat to rotate.

Furthermore, the driving device comprises a valve rod and a sleeve fixedly connected to the valve seat, and the sleeve is sleeved outside the valve rod;

the first leaf and the second leaf are both rotatably connected to the valve rod;

the valve rod rotates in the sleeve to drive the cock ball to rotate; the valve rod is followed the sleeve is to being close to or keeping away from the in-process that supporting component's direction removed, first leaf with the second leaf can rotate, so that two the hemisphere is close to one side of hinge is close to each other or is kept away from, and two the hemisphere is kept away from one side of hinge is relative the roating seat rotates.

Furthermore, the driving device also comprises a hand wheel and a locking piece;

the valve rod is in threaded connection with the hand wheel, and the hand wheel and the valve rod can be locked through the locking piece;

when the locking piece locks the hand wheel and the valve rod, the valve rod can rotate along with the hand wheel; when the locking piece is unlocked, the hand wheel rotates to drive the valve rod to be close to or far away from the supporting component.

Further, the locking member is a threaded locking member;

the hand wheel is provided with a through hole, the valve rod is provided with a threaded hole, and the threaded locking piece penetrates through the through hole and is screwed in the threaded hole.

Further, the hand wheel is connected to the sleeve in a rotating mode;

when the locking piece locks the hand wheel and the valve rod, the hand wheel can enable the valve rod to rotate in the sleeve; when the locking piece is unlocked, the hand wheel can enable the valve rod to move along the sleeve.

Furthermore, a limiting rod is arranged on the side wall of the valve rod, a limiting groove is formed in the sleeve, and the limiting rod can be arranged in the limiting groove;

when the valve rod rotates in the sleeve or the valve rod moves along the sleeve, the limiting rod can move in the limiting groove, and the groove wall of the limiting groove is used for limiting the moving range of the limiting rod.

Further, the limiting groove comprises a first groove and a second groove which are communicated with each other, the second groove extends along the axial direction of the valve rod, and the first groove extends along the radial direction of the valve rod;

when the valve rod rotates in the sleeve, the limiting rod moves along the first groove, and when the valve rod moves along the sleeve, the limiting rod moves along the second groove.

Further, the valve seat includes a body;

the valve cavity is arranged in the body, two ends of the body along the extension direction of the valve cavity are respectively connected with a flange cover, and the liquid inlet and the liquid outlet are respectively and correspondingly arranged on the two flange covers;

two the hemisphere all is provided with the sealing member, and two the hemisphere passes through respectively the sealing member butt in two the blind flange is in order to seal the inlet with the liquid outlet.

Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:

when the ball valve needs to be opened, the two hemispheres are firstly close to each other to reduce the volume of the cock ball, the flow channel is communicated with the valve cavity by rotating the cock ball in the valve cavity to a first position, and the liquid inlet is communicated with the liquid outlet through the flow channel; when the ball valve needs to be closed, the flow passage is not communicated with the valve cavity by rotating the cock ball to the second position in the valve cavity, for example, the extending direction of the valve cavity is perpendicular to the extending direction of the flow passage, the liquid inlet and the liquid outlet are separated by the cock ball at the moment, and the two hemispheres are further away from each other so as to move towards the direction close to the liquid inlet and the liquid outlet respectively, so that the liquid inlet and the liquid outlet can be respectively sealed by the two hemispheres.

Such setting, because two hemispheres of cock ball move certain distance to the direction of keeping away from each other and just can seal inlet and liquid outlet respectively, clearance fit between consequently cock ball and the valve pocket when two hemispheres merge, the wearing and tearing of cock ball when the valve pocket internal rotation can not produce wearing and tearing even between cock ball and the disk seat, have prolonged the life of ball valve, and have alleviated the problem that the ball valve leaked to a certain extent.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a ball valve provided in an embodiment of the present invention;

fig. 2 is a schematic partial structural diagram of a ball valve provided in an embodiment of the present invention (the state of the valve seat is not shown);

FIG. 3 is an enlarged partial view of portion A of the ball valve shown in FIG. 2;

fig. 4 is a schematic structural diagram of a cock ball and a valve stem of a ball valve according to an embodiment of the present invention;

FIG. 5 is an enlarged partial view of a portion B of the ball valve shown in FIG. 4;

fig. 6 is a partial schematic structural view of a ball valve according to an embodiment of the present invention (the body is not shown, and the plug ball is in the first position);

FIG. 7 is a schematic structural view from another perspective of the ball valve shown in FIG. 6;

fig. 8 is a partial schematic structural view of a ball valve according to an embodiment of the present invention (the body is not shown, and the plug ball is in a second position);

FIG. 9 is a schematic structural view from another perspective of the ball valve shown in FIG. 8;

FIG. 10 is an exploded view of a portion of the ball valve shown in FIG. 2;

fig. 11 is another schematic structural diagram of the rotary base.

Icon: 1-a valve seat; 11-a body; 12-a flange cover; 13-a liquid inlet; 2-a cock ball; 21-a flow channel; 22-hemisphere; 3-a drive device; 31-a valve stem; 311-a limiting rod; 32-a support assembly; 321-a rotating base; 3211-ring groove; 322-a fixed seat; 323-a rotating shaft; 33-a hand wheel; 34-a locking member; 41-a first sheet; 42-a second sheet; 5-a sleeve; 51-a limiting groove; 511-a first tank; 512-a second slot; 6-a seal; 7-pressing a plate; 8-bolt.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1 to 11, the present embodiment provides a ball valve including a valve seat 1 having a valve chamber formed therein and a plug ball 2 having a flow passage 21 formed therein; both ends of the valve seat 1 are respectively provided with a liquid inlet 13 and a liquid outlet which are both communicated with the valve cavity; the cock ball 2 is rotatably arranged in the valve cavity, and the cock ball 2 comprises two hemispheres 22 which can approach or depart from each other; when the cock ball 2 rotates to a first position in the valve cavity, the liquid inlet 13 is communicated with the liquid outlet through the flow channel 21; when the cock ball 2 rotates to the second position in the valve cavity, the two hemispheres 22 can be far away from each other and respectively seal the liquid inlet 13 and the liquid outlet.

When the ball valve needs to be opened, the two hemispheres 22 are firstly moved towards each other to reduce the volume of the cock ball 2, as shown in fig. 6 and 7, the flow passage 21 is communicated with the valve cavity by rotating the cock ball 2 in the valve cavity to a first position, so that the liquid inlet 13 is communicated with the liquid outlet through the flow passage 21; when the ball valve needs to be closed, referring to fig. 8 and 9, the flow passage 21 is not communicated with the valve cavity by rotating the cock ball 2 in the valve cavity to the second position, for example, the extending direction of the valve cavity is perpendicular to the extending direction of the flow passage 21, at this time, the liquid inlet 13 and the liquid outlet are spaced by the cock ball 2, and then the two hemispheres 22 are moved in the directions away from each other, so that the two hemispheres 22 are moved in the directions close to the liquid inlet 13 and the liquid outlet, respectively, and thus the two hemispheres 22 can seal the liquid inlet 13 and the liquid outlet, respectively.

Such setting, because two hemispheres 22 of cock ball 2 move the certain distance to the direction of keeping away from each other and just can seal inlet 13 and liquid outlet respectively, clearance fit between cock ball 2 and the valve pocket when consequently two hemispheres 22 merge, the wearing and tearing of cock ball 2 when the valve pocket internal rotation can not produce wearing and tearing even between cock ball 2 and the disk seat 1, has prolonged the life of ball valve, and has alleviated the problem that the ball valve leaked to a certain extent.

In addition, when the ball valve is closed, the cock ball 2 just rotates to the liquid inlet 13 and the liquid outlet to pass through the interval between the cock balls 2, at this time, the fluid in the flow channel 21 still exists, and the pressure of the fluid in the flow channel 21 and the fluid outside the ball valve are equal at this moment, because the two hemispheres 22 move towards the direction away from each other, the space of the flow channel 21 is increased, so that the contact area between the fluid and the side wall of the flow channel 21 is increased, therefore, the pressure of the fluid on the two hemispheres 22 is increased, the pressure acts on the two hemispheres 22 respectively, the two hemispheres are favorable for moving towards the direction away from each other, and the sealing strength of the two hemispheres 22 for sealing the liquid.

Preferably, as shown in fig. 1 and 2, the ball valve further comprises a driving device 3 and a hinge; the hinge comprises a first leaf 41 and a second leaf 42, and two hemispheres 22 are respectively and correspondingly connected with the first leaf 41 and the second leaf 42 in a rotating way; the driving device 3 is connected to the first leaf 41 and the second leaf 42, and can drive the cock ball 2 to rotate in the valve cavity through the hinge, and can drive the first leaf 41 and the second leaf 42 to rotate so as to enable the two hemispheres 22 to approach or separate from each other.

The driving device 3 drives the cock ball 2 to rotate in the valve cavity through the hinge, so that on-off conversion between the liquid inlet 13 and the liquid outlet is realized, and opening and closing of the ball valve are realized. In addition, the driving device 3 drives the two hemispheres 22 to move towards the direction close to each other, so that the two hemispheres 22 are combined, the volume of the cock ball 2 is reduced, the cock ball 2 can rotate in the valve cavity, and the abrasion among the cock ball 2, the sealing element 6 and the valve seat 1 is reduced when the cock ball 2 rotates in the valve cavity; the driving device 3 drives the two hemispheres 22 to move towards the direction away from each other, so that the two hemispheres 22 are expanded to seal the liquid inlet 13 and the liquid outlet.

Preferably, the ball valve further includes a support assembly 32; the supporting component 32 comprises a rotating seat 321 and a fixed seat 322, the rotating seat 321 is rotatably connected to the valve seat 1, and the fixed seat 322 is fixedly connected to the valve seat 1 and is arranged on one side of the cock ball 2 away from the hinge; the two hemispheres 22 are rotatably connected to the rotating base 321, and the rotating base 321 abuts against the fixed base 322; the rotation of the cock ball 2 in the valve cavity can drive the rotating seat 321 to rotate relative to the fixed seat 322; the first leaf 41 and the second leaf 42 can be rotated to drive the sides of the two hemispheres 22 close to the hinge to move close to or away from each other, and the sides of the two hemispheres 22 away from the hinge to rotate relative to the rotating base 321.

For example, referring to fig. 10, the two hemispheres 22 are rotatably connected to the rotating base 321 through the rotating shaft 323, so that both the two hemispheres 22 can rotate relative to the rotating base 321 with the rotating shaft 323 as a rotating shaft. The arrangement provides support for the rotation of the two hemispheres 22, and the two hemispheres 22 can be prevented from falling off the rotating base 321 during the rotation of the two hemispheres 22.

Preferably, the rotating base 321 is provided with a track, the rotating shaft 323 is provided with a guide post, and when the two hemispheres 22 rotate relative to the rotating base 321, the guide post of the rotating shaft 323 moves along the track of the rotating base 321, so that the stability of the rotation of the hemispheres 22 relative to the rotating base 321 is ensured.

For example, the rotary seat 321 is clearance-fitted with the valve seat 1 to enable the rotary seat 321 to rotate relative to the valve seat 1.

The fixing seat 322 provides a supporting function for the cock ball 2, and supports on a side of the cock ball 2 away from the hinge. When the cock ball 2 rotates in the valve cavity, the rotating seat 321 can be driven to rotate along with the cock ball, and at the moment, the rotating seat 321 rotates relative to the fixed seat 322, so that the opening and closing of the ball valve are realized; when first page piece 41 and second page piece 42 rotate, can drive two hemispheres 22 and be close to each other or keep away from near one side of hinge, and two hemispheres 22 rotate from the relative roating seat 321 of one side of hinge, have realized that two hemispheres 22 are close to the volume of one side of hinge and have reduced or increase to be convenient for the rotation of cock ball 2, and to inlet 13 and liquid outlet sealed.

Preferably, as shown in fig. 4 and 5, the driving device 3 includes a valve rod 31 and a sleeve 5 fixedly connected to the valve seat 1, the sleeve 5 is sleeved on the valve rod 31, and the first leaf 41 and the second leaf 42 are both rotatably connected to the valve rod 31; the rotation of the valve rod 31 in the sleeve 5 can drive the plug ball 2 to rotate in the valve cavity relative to the support assembly 32; during the movement of the valve rod 31 along the sleeve 5 in the direction of approaching or moving away from the support assembly 32, the first leaf 41 and the second leaf 42 can rotate, so that the sides of the two hemispheres 22 close to the hinge move in the direction of moving away or approaching each other.

With the arrangement, when the valve rod 31 rotates, the cock ball 2 can be driven to rotate in the valve cavity, and the opening and closing of the ball valve are realized.

When the valve rod 31 moves to one side close to the supporting component 32, due to the supporting effect of the fixing seat 322 on the plug ball 2, the plug ball 2 cannot move along with the valve rod 31, at this time, the first leaf 41 and the second leaf 42 rotate relative to the valve rod 31 symmetrically, and the first leaf 41 and the second leaf 42 rotate in the direction away from each other, so that one side of the two hemispheres 22 close to the hinge moves in the direction away from each other, and the movement of the two hemispheres is realized by rotating relative to the rotating seat 321, so that the two hemispheres 22 gradually approach to the liquid inlet 13 and the liquid outlet, thereby sealing the liquid inlet 13 and the liquid outlet and realizing closing of the ball valve.

When the valve rod 31 moves to the side far away from the support assembly 32, a pulling force is provided for the two hemispheres 22, so that the first leaf 41 and the second leaf 42 rotate towards the direction close to each other relative to the valve rod 31, and the two hemispheres 22 move towards the direction close to each other, so that the two hemispheres 22 are combined, the volume of the cock ball 2 is reduced, and the rotation of the cock ball 2 in the valve cavity is facilitated.

Optionally, the rotating base 321 includes a first portion and a second portion connected to each other, the two hemispheres 22 are respectively rotatably connected to the first portion, and the second portion abuts against the fixing base 322. Referring to fig. 10, the second portion is a cylinder, and preferably, referring to fig. 11, a ring groove 3211 is formed in the cylinder, and the ring groove is clamped on the valve seat 1 and can rotate relative to the valve seat. The second part rotates relative to the valve seat, so that the cock ball 2 can rotate in the valve cavity; and the annular groove card locates valve seat 1 and provides limiting displacement for the cock ball, when valve rod 31 moves to the one side of keeping away from supporting component 32, through the spacing of annular groove, prevents cock ball 2 and removes along with valve rod 31 to first leaf 41 and second leaf 42 rotate, thereby realized that two hemispheres 22 move to the direction that is close to each other.

Preferably, as shown in fig. 1 and 2, the driving device 3 further comprises a hand wheel 33 and a locking member 34; the valve rod 31 is in threaded connection with the hand wheel 33, for example, an external thread is arranged on the valve rod 31, an internal thread matched with the external thread is arranged on the hand wheel 33, the external thread is in fit connection with the internal thread, and the hand wheel 33 and the valve rod 31 can be locked through a locking piece 34; when the locking piece 34 locks the hand wheel 33 and the valve rod 31, the valve rod 31 can rotate along with the hand wheel 33; when the locking piece 34 is unlocked, the hand wheel 33 rotates to drive the valve rod 31 to move in the direction of approaching or separating from the support assembly 32 along the axial direction.

Due to the arrangement, the hand wheel 33 and the locking piece 34 can simultaneously realize the rotation of the valve rod 31 and the movement towards the direction close to or away from the supporting assembly 32, so that the structure of the ball valve is simpler, and the manufacturing cost of the ball valve is reduced. The driving device 3 may be other devices that can drive the valve rod 31 to rotate and can drive the valve rod 31 to move, and is not limited herein.

Preferably, as shown in fig. 1 and 4, retaining member 34 is a threaded retaining member; the hand wheel 33 is provided with a through hole, the valve rod 31 is provided with a threaded hole, and the threaded locking part penetrates through the through hole and is screwed in the threaded hole.

In this embodiment, the threaded locking member may be any one of a screw, a bolt, or a stud, and as long as the threaded locking member is in a form that can achieve detachable fixed connection between the hand wheel 33 and the valve rod 31, the specific form of the threaded locking member is not limited in this embodiment.

When the hand wheel 33 and the valve rod 31 need to be locked, the threaded locking piece penetrates through the through hole and is screwed in the threaded hole, and at the moment, when the hand wheel 33 is rotated, the valve rod 31 can rotate along with the threaded locking piece, so that the cock ball 2 can rotate in the valve cavity. When the threaded locking piece is screwed out of the threaded hole, the valve rod 31 can be driven to move by rotating the hand wheel 33. For example, by turning the hand wheel 33 in a first direction, the valve stem 31 moves closer to the support member 32; turning the handwheel 33 in a second direction moves the valve stem 31 away from the support assembly 32, with the first and second directions being opposite.

Preferably, as shown in fig. 1 and 2, the hand wheel 33 is rotatably connected to the sleeve 5; when the locking piece 34 locks the hand wheel 33 and the valve rod 31, the hand wheel 33 rotates relative to the sleeve 5 to drive the valve rod 31 to rotate in the sleeve 5; when the locking member 34 is unlocked, rotation of the hand wheel 33 relative to the sleeve 5 causes the valve stem 31 to move along the sleeve 5.

Preferably, as shown in fig. 3, a limit rod 311 is disposed on a side wall of the valve rod 31, a limit groove 51 is disposed on the sleeve 5, and the limit rod 311 can be disposed in the limit groove 51; when the valve rod 31 rotates in the sleeve 5 or the valve rod 31 moves, the limiting rod 311 can move in the limiting groove 51, and the groove wall of the limiting groove 51 is used for limiting the moving range of the limiting rod 311.

With this arrangement, the limiting groove 51 provides a limiting and guiding function for the rotation and movement of the valve rod 31, so that the rotation and movement of the valve rod 31 are more stable.

Preferably, referring to fig. 1, the valve seat 1 comprises a body 11; the valve cavity is arranged in the body 11, two ends of the body 11 along the extension direction of the valve cavity are respectively connected with the flange covers 12, and the liquid inlet 13 and the liquid outlet are respectively and correspondingly arranged on the two flange covers 12; the two hemispheres 22 are provided with sealing members 6, and the two hemispheres 22 are abutted against the two flange covers 12 through the sealing members 6 respectively so as to seal the liquid inlet 13 and the liquid outlet.

Preferably, the seal 6 is a sealing ring; the hemisphere 22 is provided with a groove, and the sealing ring is disposed in the groove, for example, the sealing ring is clamped in the groove, welded in the groove, or bonded in the groove.

Optionally, the flange cover 12 and the body 11 are connected by snapping, fastening, or screwing, without limitation. In this embodiment, the body 11 and the flange cover 12 are connected by a screw connection.

That is, there are two sealing members 6, and the two sealing members 6 are respectively disposed on the two hemispheres 22. By the arrangement, the liquid inlet 13 and the liquid outlet are sealed, and the sealing performance of the ball valve is improved.

Preferably, as shown in fig. 2, the pressure plate 7 is rotatably sleeved on the valve rod 31, for example, by the valve rod 31 being in clearance fit with a through hole on the pressure plate 7, so that the valve rod 31 can rotate relative to the pressure plate 7 and move along the through hole. The peripheral wall of the sleeve 5 is provided with a pressure groove, the pressure plate 7 extends out of the pressure groove, a filler (made of plastic materials such as polytetrafluoroethylene) is arranged between the pressure plate 7 and the side wall of the pressure groove, the pressure plate 7 is fixed with the sleeve 5 through a bolt 8, the bolt 8 enables the pressure plate 7 to be tightly pressed on the side wall of the pressure groove, and a gap between the valve rod 31 and the sleeve 5 is sealed through the filler.

Preferably, as shown in fig. 2 and 3, the limiting groove 51 comprises a first groove 511 and a second groove 512 which are communicated, the second groove 512 extends along the axial direction of the valve rod 31, and the first groove 511 extends along the radial direction of the valve rod 31; when the valve rod 31 rotates in the sleeve 5, the limiting rod 311 moves along the first groove 511, and when the valve rod 31 moves along the sleeve 5, the limiting rod 311 moves along the second groove 512.

Wherein the second slot 512 is located at one end of the first slot 511; in the process that the hand wheel 33 drives the valve rod 31 to rotate, the limiting rod 311 moves towards one end where the second groove 512 is located along the first groove 511, and in the process that the hand wheel 33 drives the valve rod 31 to approach the support component 32, the limiting rod 311 moves towards the direction departing from the first groove 511 along the second groove 512.

For example, the first slot 511 includes a first side and a second side corresponding to each other along the extending direction thereof, and the second slot 512 is disposed on the second side; when the cock ball 2 rotates to the first position, the limiting rod 311 is positioned at the first side, and when the cock ball 2 rotates to the second position, the limiting rod 311 is positioned at the second side; when the hand wheel 33 rotates from the first side to the second side, the valve rod 31 can be driven to move towards the direction close to the support component 32, and at the moment, the limiting rod 311 moves along the second groove 512.

With the arrangement, the limiting and guiding function is provided for the rotation of the valve rod 31 through the first groove 511, and the limiting and guiding function is provided for the movement of the valve rod 31 through the second groove 512, so that the limiting and guiding function is provided for the rotation and movement of the valve rod 31, and the rotation and movement of the valve rod 31 are more stable.

Wherein, the operation process of this ball valve is as follows: when the ball valve needs to be closed, the threaded locking piece penetrates through the through hole and is screwed in the threaded hole to lock the hand wheel 33 and the valve rod 31, the valve rod 31 can be driven to rotate when the hand wheel 33 is rotated, in the process, the limiting rod 311 moves along the first groove 511 until the limiting rod moves to the second side of the first groove 511, the hand wheel 33 cannot be continuously rotated at the moment, the cock ball 2 rotates to the second position, and the liquid inlet 13 and the liquid outlet are separated through the cock ball 2 at the moment; the threaded locking part is screwed out of the threaded hole, the hand wheel 33 and the valve rod 31 are unlocked, the hand wheel 33 is rotated from the first side to the second side, the valve rod 31 cannot rotate continuously along with the hand wheel 33 due to the limiting effect of the second side of the first groove 511 on the limiting rod 311, and therefore the valve rod 31 moves towards the direction close to the supporting component 32, the limiting rod 311 moves along the second groove 512, the two hemispheres 22 move towards the direction far away from each other until the two hemispheres 22 respectively seal the liquid inlet 13 and the liquid outlet through the sealing part 6, and the ball valve is closed and sealed.

When the ball valve needs to be opened, the hand wheel 33 is rotated from the second side to the first side under the state that the hand wheel 33 and the valve rod 31 are unlocked, and the valve rod 31 cannot rotate along with the hand wheel under the limiting action of the second groove 512, so that the valve rod 31 moves towards the direction far away from the support assembly 32, the limiting rod 311 moves along the second groove 512, the two hemispheres 22 move towards the direction close to each other until the limiting rod 311 moves to the second side of the first groove 511, and at the moment, the volume of the plug ball 2 is reduced; pass through the through-hole and connect in the screw hole realization locking hand wheel 33 and valve rod 31 through the screw retaining member, from the second side to the direction rotation hand wheel 33 of first side to drive valve rod 31 and rotate, its in-process, gag lever post 311 removes along first groove 511, until removing to the first side of first groove 511, can't continue to rotate hand wheel 33 this moment, and cock ball 2 rotates to the first position, inlet 13 and liquid outlet pass through flow channel 21 intercommunication this moment.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims (10)

1. A ball valve is characterized by comprising a valve seat (1) with a valve cavity arranged therein and a cock ball (2) with a flow passage (21) arranged therein; a liquid inlet (13) and a liquid outlet which are communicated with the valve cavity are respectively formed at two ends of the valve seat (1);

the cock ball (2) is rotatably arranged in the valve cavity, and the cock ball (2) comprises two hemispheres (22) which can approach or depart from each other;

when the cock ball (2) rotates to a first position, the liquid inlet (13) and the liquid outlet are communicated through the flow channel (21); when the cock ball (2) rotates to the second position, the two hemispheres (22) can be far away from each other and respectively seal the liquid inlet (13) and the liquid outlet correspondingly.

2. The ball valve according to claim 1, further comprising an actuating device (3) and a hinge;

the hinge comprises a first leaf (41) and a second leaf (42), and the two hemispheres (22) are respectively and correspondingly connected with the first leaf (41) and the second leaf (42) in a rotating manner;

the driving device (3) is connected to the first leaf (41) and the second leaf (42) and can drive the cock ball (2) to rotate in the valve cavity through the hinge, and can drive the first leaf (41) and the second leaf (42) to rotate so as to enable the two hemispheres (22) to approach or move away from each other.

3. The ball valve according to claim 2, further comprising a support assembly (32);

the support assembly (32) comprises a rotating seat (321) and a fixed seat (322), the rotating seat (321) is rotatably connected to the valve seat (1), and the fixed seat (322) is fixedly connected to the valve seat (1) and is arranged on one side, away from the hinge, of the cock ball (2);

the two hemispheres (22) are rotatably connected to the rotating seat (321), and the rotating seat (321) abuts against the fixed seat (322);

the rotation of the cock ball (2) in the valve cavity can drive the rotating seat (321) to rotate relative to the fixed seat (322); the first leaf (41) and the second leaf (42) rotate to drive one sides, close to the hinge, of the hemispheres (22) to be close to or far away from each other, and one sides, far away from the hinge, of the hemispheres (22) rotate relative to the rotating base (321).

4. A ball valve according to claim 3, characterized in that said actuating means (3) comprise a stem (31) and a sleeve (5) fixed to said seat (1), said sleeve (5) being housed in said stem (31);

the first leaf (41) and the second leaf (42) are both rotatably connected to the valve rod (31);

the valve rod (31) rotates in the sleeve (5) to drive the cock ball (2) to rotate; the valve rod (31) is followed sleeve (5) is to being close to or keeping away from the in-process that the direction of supporting component (32) removed, first leaf (41) with second leaf (42) can rotate, so that two hemisphere (22) are close to one side of hinge is close to each other or is kept away from, and two hemisphere (22) are kept away from one side of hinge is relative roating seat (321) rotates.

5. The ball valve according to claim 4, characterized in that the driving means (3) further comprise a hand wheel (33) and a locking element (34);

the valve rod (31) is in threaded connection with the hand wheel (33), and the hand wheel (33) and the valve rod (31) can be locked through the locking piece (34);

when the locking piece (34) locks the hand wheel (33) and the valve rod (31), the valve rod (31) can rotate along with the hand wheel (33); when the locking piece (34) is unlocked, the hand wheel (33) rotates to drive the valve rod (31) to be close to or far away from the support assembly (32).

6. The ball valve according to claim 5, characterized in that the locking member (34) is a threaded locking member;

the hand wheel (33) is provided with a through hole, the valve rod (31) is provided with a threaded hole, and the threaded locking piece penetrates through the through hole and is screwed in the threaded hole.

7. The ball valve according to claim 5, characterized in that the hand wheel (33) is rotatably connected to the sleeve (5);

when the locking piece (34) locks the hand wheel (33) and the valve rod (31), the hand wheel (33) can enable the valve rod (31) to rotate in the sleeve (5); when the locking piece (34) is unlocked, the hand wheel (33) can enable the valve rod (31) to move along the sleeve (5).

8. The ball valve according to claim 7, wherein a limiting rod (311) is arranged on the side wall of the valve rod (31), a limiting groove (51) is formed on the sleeve (5), and the limiting rod (311) can be arranged in the limiting groove (51);

when the valve rod (31) rotates in the sleeve (5) or the valve rod (31) moves along the sleeve (5), the limiting rod (311) can move in the limiting groove (51), and the groove wall of the limiting groove (51) is used for limiting the moving range of the limiting rod (311).

9. The ball valve according to claim 8, wherein the limiting groove (51) comprises a first groove (511) and a second groove (512) which are communicated with each other, the second groove (512) extends along an axial direction of the valve stem (31), and the first groove (511) extends along a radial direction of the valve stem (31);

when the valve rod (31) rotates in the sleeve (5), the limiting rod (311) moves along the first groove (511), and when the valve rod (31) moves along the sleeve (5), the limiting rod (311) moves along the second groove (512).

10. The ball valve according to any of the claims 1 to 9, characterized in that the valve seat (1) comprises a body (11);

the valve cavity is arranged in the body (11), two ends of the body (11) along the extension direction of the valve cavity are respectively connected with a flange cover (12), and the liquid inlet (13) and the liquid outlet are respectively and correspondingly arranged on the two flange covers (12);

two hemisphere (22) all are provided with sealing member (6), and two hemisphere (22) are respectively through sealing member (6) butt in two flange cover (12) to seal inlet (13) with the liquid outlet.

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