CN217440824U - Ball valve with movable valve plate - Google Patents

Abstract

A ball valve with a movable valve plate is characterized in that a ball core of a double-movable valve plate is arranged in a cavity of a left valve body, the lower end of a control rod is arranged in a strip-shaped control rod groove I of the ball core I, and the lower end of a pin shaft is positioned in a copper sleeve in a blind hole of a copper sleeve of the left valve body by an adjusting screw; or the ball core of the single movable valve plate is arranged in the cavity of the left valve body, the lower end of the control rod is arranged in a control rod groove II with a strip shape of the ball core II, and the lower end of the pin shaft is positioned in the copper sleeve in the blind hole of the copper sleeve of the left valve body by the adjusting screw; the left port of the three-way ball valve is connected with the left connecting pipe orifice of the left valve body through a left connecting pipe, the right port of the three-way ball valve is connected with the right connecting pipe orifice of the right valve body through a right connecting pipe, and the lower port of the three-way ball valve is connected with the valve core pipe orifice of the left valve body through a valve core connecting pipe; reliable sealing is realized through the matching of the inner spherical surface of the valve body and the cambered surface of the valve plate; when the valve is opened, the valve plate is separated from the sealing surface of the valve body, and a friction-free state is formed in a sealing mode, so that the service life is longer, and the use and maintenance cost is reduced.

Description

Ball valve with movable valve plate

Technical Field

The utility model relates to a take ball valve of movable valve plate uses in the fluid field, is the ball valve that is used for pipeline fluid break-make.

Background

In the conventional ball valve structure, when the ball valve is opened and closed, the ball core is tightly attached to the sealing surface of one side of the ball valve due to the thrust generated by the pressure of one side of the ball valve on the pressure of the ball core, as shown in fig. 14, especially, the ball valve with a large diameter or high pressure is very stressed when being opened and closed, so that the ball valve is difficult to open and close. Under the effect of internal pressure, the ball core and the sealing surface are abraded quickly to aggravate, so that the reliable service life of the ball valve is shortened. The surface smoothness of the ball core directly influences the sealing effect, and particularly, the smooth finish and roundness of a large-diameter ball body are extremely difficult to machine, so that the corresponding machining cost is difficult to reduce.

Any injury and the out-of-tolerance on the surface of the ball body can influence the sealing effect of the whole ball valve, and when the ball valve is subjected to severe temperature change, the valve body and the ball core of the ball valve are different in structure and material, different in thermal expansion coefficient, and capable of causing the mutual fit clearance to change greatly, so that the sealing effect is changed. The energy loss due to the deterioration of the sealing performance of the ball valve is an immeasurable loss. The existing structure is difficult to open and close, and huge property loss is caused in use. The common phenomenon of the existing valve is that the valve in the oil tank area of the wharf turns eighty circles to be a buckle, and one hundred buckles are needed to close the valve.

Disclosure of Invention

In view of prior art's situation and the not enough of existence, the utility model provides a take ball valve of movable valve plate reforms into the ball core of taking movable valve plate traditional ball valve ball core, and the ball core is through borrowing the interior fluidic power control ball core valve plate action of oneself of former pipeline, realizes reliably sealing through ball valve plate and valve body cooperation, accomplishes closing and opening of ball valve. The utility model discloses a ball core and valve body are not direct seal, and the valve is when opening, and the valve plate on the ball core leaves with the sealed face of valve body, and corresponding sealed face forms no friction state, therefore ball valve life is longer.

The utility model adopts the technical proposal that: a ball valve with a movable valve plate comprises a left valve body, a right valve body and a control rod, and further comprises a movable valve plate ball core, a sealing ring, a copper sleeve, a pin shaft, an adjusting screw, a three-way ball valve, a left connecting pipe, a right connecting pipe and a valve core connecting pipe, wherein the movable valve plate ball core comprises a single movable valve plate ball core or a double movable valve plate ball core; the ball core of the double-movable valve plate is arranged in the cavity of the left valve body, one end of the control rod is arranged in a strip-shaped control rod groove I of the ball core I, a round convex surface of the control rod is arranged in a round groove I of the ball core I, a sealing ring is arranged in a sealing groove I in the round groove I, a vertical pipe channel II of the control rod is arranged corresponding to the vertical pipe channel I of the ball core I, the pin shaft is arranged in a pin shaft hole, and the lower end of the pin shaft is positioned in a copper sleeve in a blind hole of a copper sleeve of the left valve body by an adjusting screw;

or

The ball core of the single movable valve plate is arranged in the cavity of the left valve body, one end of the control rod is arranged in a control rod groove II with a strip shape of the ball core II, a round convex surface of the control rod is arranged in a round groove II with the ball core II, a sealing ring is arranged in a sealing groove II in the round groove II, a vertical pipe II of the control rod is arranged corresponding to a vertical pipe III of the ball core II, the pin shaft is arranged in a pin shaft hole, and the lower end of the pin shaft is positioned in a copper sleeve in a blind hole of a copper sleeve of the left valve body by an adjusting screw; the right valve body and the left valve body are fixed together, and the spherical surface of the spherical core of the double-movable valve plate or the spherical core of the single-movable valve plate is in clearance fit with the valve cavities of the right valve body and the left valve body;

the left port of the three-way ball valve is connected with the left connecting pipe orifice of the left valve body through a left connecting pipe, the right port of the three-way ball valve is connected with the right connecting pipe orifice of the right valve body through a right connecting pipe, and the lower port of the three-way ball valve is connected with the valve core pipe orifice of the left valve body through a valve core connecting pipe; the fluid passage of the ball core of the double-movable valve plate is as follows: when high-pressure fluid exists in the right valve body fluid pipeline, the three-way ball valve is switched, so that the lower port of the three-way ball valve is communicated with the right port, the lower port is not communicated with the left end, the right valve body high-pressure fluid pipeline is communicated with a cavity between two valve plates of the ball core I and the inner surfaces of two valve plate grooves I sequentially through a right connecting pipe, the right port of the three-way ball valve, the lower port, a valve core connecting pipe, a transverse pipeline II, a vertical pipeline I, two transverse pipelines I and the ball core I, and the ball valve is completely closed; switching the three-way ball valve to enable the lower port of the three-way ball valve to be communicated with the left port, the lower port of the three-way ball valve to be not communicated with the right end, a left valve body fluid pipeline is communicated with a cavity between two valve plates of the ball core I and the inner surfaces of two valve plate grooves I sequentially through a left connecting pipe, the left port of the three-way ball valve, the lower port, a valve core connecting pipe, a transverse pipeline II, a vertical pipeline I and two transverse pipelines I, rotating a control rod for 90 degrees, the fluid channel I of the ball core I is communicated with fluid pipelines on two sides of the left valve body and the right valve body, and the ball valve is completely opened;

the fluid passage of the ball core of the single movable valve plate is as follows: when the right valve body fluid pipeline is high-pressure fluid, the three-way ball valve is switched, the lower end of the three-way ball valve is communicated with the right port, the lower end of the three-way ball valve is not communicated with the left end, the right valve body high-pressure fluid pipeline is communicated with a cavity between a valve plate of the ball core II and the inner surface of the valve plate groove II through a right connecting pipe, a right port of the three-way ball valve, a lower port, a valve core connecting pipe, a transverse pipeline II, a vertical pipeline III and a transverse pipeline III in sequence, and the ball valve is completely closed; and switching the three-way ball valve to enable the lower end of the three-way ball valve to be communicated with the left port and the lower end of the three-way ball valve to be not communicated with the right end, enabling the fluid pipeline of the left valve body to be communicated with the cavity between the valve plate and the inner surface of the valve plate groove through the left connecting pipe, the left port of the three-way ball valve, the lower port, the valve core connecting pipe, the transverse pipeline II, the vertical pipeline III and the transverse pipeline III in sequence, rotating the control rod by an angle of 90 degrees, and completely opening the ball valve.

The utility model has the advantages that: the sealing structure in the closing state of the ball valve is a sealing structure with the spherical surface of the valve body matched with the cambered surface of the ball core valve plate, the ball core controls the action of the ball core valve plate by the pressure of the fluid in the original pipeline, and the complete linear sealing is realized by the matching of the ball core valve plate and the valve body, so that the reliable sealing of the ball valve is ensured.

The structure of the ball valve in the open state is that the ball core and the valve body are not directly sealed, the valve plate of the ball core and the sealing surface of the valve body are provided with a proper gap, when the valve is opened, the valve plate on the ball core is separated from the sealing surface of the valve body, and the corresponding sealing surface forms a friction-free state, so that the valve is easy to open and close, the service life of the ball valve is longer, and the use and maintenance cost is reduced.

The ball valve is not affected by temperature change when opened or closed, the smoothness required for processing the sealing surface of the valve plate and the valve body is not high, and the form and position tolerance deviation can be adjusted during assembly, so that special processing equipment is not needed.

The outer ring of the cambered surface of the valve plate is provided with an annular reinforcing surface, the annular reinforcing surface is turned firstly, then is subjected to repair welding and then is turned, the wear resistance and the corrosion resistance are enhanced, the sealing surfaces of the left valve body and the right valve body corresponding to the valve plate also need to be turned firstly, then is subjected to repair welding and then is turned, and finally the two sealing surfaces are mutually ground, so that the two sealing surfaces are matched without a gap. Because the unique valve plate moves horizontally and the ball core rotates, the valve plate and the valve body are in a spherical-to-spherical matching structure, and the sealing effect of the valve plate and the valve body is greatly improved compared with a plane-to-plane sealing effect.

The structural design of protruding axle exhaust hole and exhaust inclined hole makes cavity internal pressure between valve plate and the valve plate groove when the valve plate removes to the valve plate inslot, and clearance is in getting into the cavity between through exhaust inclined hole, exhaust hole, valve plate blind hole and the protruding axle, and the valve plate of being convenient for realizes on the protruding axle unimpeded and slides.

The ball valve with the ball core of the double-movable valve plate can be used when a right valve body fluid pipeline is high-pressure fluid or a left valve body fluid pipeline is high-pressure fluid, the opening and closing principles of the ball valve are the same, and the operation actions are opposite.

Drawings

FIG. 1 is an external view of the present invention;

FIG. 2 is a cross-sectional view of the closed state structure of the ball valve with a ball core and a double movable valve plate of the present invention;

FIG. 3 is a sectional view of the structure of the ball valve with the ball core and the double movable valve plates in the pressure relief state;

FIG. 4 is a cross-sectional view of the closed state structure of the ball valve with a single movable valve plate and a ball core of the present invention;

FIG. 5 is a sectional view of the structure of the ball valve with a single movable valve plate and a ball core in a pressure relief state;

fig. 6 is a schematic structural view of the control rod of the present invention;

fig. 7 is a structural sectional view of the control rod of the present invention;

FIG. 8 is a schematic structural view of a ball core I of the present invention;

FIG. 9 is a structural sectional view of the ball core I of the present invention;

FIG. 10 is a structural sectional view of a ball core II of the present invention;

FIG. 11 is a structural sectional view of a ball core II of the present invention;

FIG. 12 is a schematic structural view of the valve plate of the present invention;

FIG. 13 is a sectional view of the valve plate according to the present invention;

fig. 14 is a sectional view of a conventional ball valve structure.

Detailed Description

As shown in fig. 1 to 13, a ball valve with a movable valve plate comprises a left valve body 1, a right valve body 2 and a control rod 3, and further comprises a ball core of the movable valve plate, a screw 6, a sealing ring 7, a copper sleeve 8, a pin shaft 9, an adjusting screw 10, a three-way ball valve 11, a left connecting pipe 12, a right connecting pipe 13 and a valve core connecting pipe 14, wherein the ball core of the movable valve plate comprises a ball core 4 of a single movable valve plate or a ball core 5 of a double movable valve plate.

A valve core pipe orifice 1-1-1 is arranged on the wall of a control rod sleeve 1-1 at the upper end of a left valve body 1, a copper sleeve blind hole 1-2 is arranged at the lower end of the left valve body 1, a left connecting pipe orifice 1-3 is arranged on a fluid pipeline of the left valve body 1, a left valve body sealing surface 1-4 is arranged at the position in the left valve body, which is contacted with a valve plate, a right connecting pipe orifice 2-1 is arranged on the fluid pipeline of the right valve body 2, a right valve body sealing surface 2-2 is arranged at the position in the right valve body, which is contacted with the valve plate, the lower end of the control rod 3 is a large-diameter cylinder, the upper end of the control rod is a small-diameter cylinder, two corresponding surfaces of the large-diameter cylinder are a plane I3-1, a section of vertical pipeline II 3-3 is arranged on the round convex surface 3-2 of the lower end surface of the large-diameter cylinder, and a run-through transverse pipeline II 3-4 is arranged on the small-diameter cylinder, the horizontal pipeline II 3-4 is communicated with the vertical pipeline II 3-3.

The double-movable valve plate ball core 5 comprises a ball core I5-1, a valve plate 5-2 and a valve plate sealing ring 5-3;

the valve plate 5-2 is a circular plate, one side of the valve plate is an arc surface 5-2-1, the other side of the valve plate is a plane, a circle of bulges 5-2-2 are arranged along the edge of the plane, a blind hole 5-2-3 is arranged at the center of the plane, a circle of sealing grooves 5-2-4 are arranged on the outer circular surface between the arc surface 5-2-1 and the plane, and an annular sealing surface 5-2-5 is arranged on the outer circular side of the arc surface.

The ball core I5-1 is a spherical body, a communicated fluid channel I5-1-1 is arranged on the corresponding spherical surface of the ball core I5-1, a strip-shaped control rod groove I5-1-2 is arranged on the spherical surface at the upper end of the fluid channel I5-1-1, a circular groove I5-1-3 is arranged in the control rod groove I5-1-2, a vertical pipeline I5-1-4 is arranged at the center in the circular groove I5-1-3, and a circle of sealing groove I5-1-5 is arranged on the groove surface at the periphery of the vertical pipeline I5-1-4; the spherical surface at the lower end of the fluid channel I5-1-1 is provided with a pin shaft hole I5-1-6 and an adjusting screw hole I5-1-7 which are communicated with each other, the spherical surfaces at the two sides of the fluid channel I5-1-1 are correspondingly provided with a circular valve plate groove I5-1-8 respectively, the centers of the inner surfaces of the two valve plate grooves I5-1-8 are provided with a protruding shaft I5-1-9 respectively, the two protruding shafts I5-1-9 are provided with an exhaust hole I5-1-9-1 and an exhaust inclined hole I5-1-9-2 respectively, the exhaust hole I5-1-9-1 is communicated with the valve plate groove I5-1-8 through the exhaust inclined hole I5-1-9-2, the upper ends of the inner surfaces of the two valve plate grooves I5-1-8 are respectively provided with a transverse pipeline I5-1-10, and the two transverse pipelines I5-1-10 are communicated with a vertical pipeline I5-1-4.

The valve plate grooves I5-1-8 on two sides of the ball core I5-1 are respectively provided with a valve plate 5-2, the projecting shafts I5-1-9 in the two valve plate grooves I5-1-8 are respectively inserted into the blind holes 5-2-3 of the two valve plates 5-2 for clearance fit, the two valve plates 5-2 can horizontally move on the two projecting shafts I5-1-9, the planes of the two valve plates 5-2 are in clearance fit with the inner surfaces of the valve plate grooves I5-1-8 through a circle of projections 5-2-2, the seal grooves 5-2-4 between the walls of the valve plate grooves I5-1-8 and the valve plates 5-2 are respectively provided with a valve plate seal ring 5-3, the vertical pipe I5-1-4 of the ball core I5-1 is respectively provided with the two valve plates 5-2 and the two valve plates 5-2 through two transverse pipes I5-1-10 The inner surfaces of the valve plate grooves I5-1-8 are communicated with each other.

The single-movable valve plate ball core 4 comprises a ball core II 4-1, a valve plate 5-2 and a valve plate sealing ring 5-3; the ball core II 4-1 is a spherical body, a communicated fluid channel II 4-1-1 is arranged on the spherical surface corresponding to the ball core II 4-1, a strip-shaped control rod groove II 4-1-2 is arranged on the spherical surface at the upper end of the fluid channel II 4-1-1, a circular groove II 4-1-3 is arranged in the control rod groove II 4-1-2, a vertical pipeline III 4-1-4 is arranged at the center in the circular groove II 4-1-3, and a circle of sealing groove II 4-1-5 is arranged on the groove surface at the periphery of the vertical pipeline III 4-1-4; a pin shaft hole II 4-1-6 and an adjusting screw hole II 4-1-7 which are communicated are arranged on the spherical surface at the lower end of the fluid channel II 4-1-1, a round valve plate groove II 4-1-8 is arranged on the spherical surface at one side of the fluid channel II 4-1-1, a protruding shaft II 4-1-9 is arranged at the center of the inner surface of the valve plate groove II 4-1-8, exhaust holes II 4-1-9-1 and exhaust inclined holes II 4-1-9-2 are respectively arranged on the two protruding shafts II 4-1-9, the exhaust holes II 4-1-9-1 are communicated with the valve plate groove II 4-1-8 through the exhaust inclined holes II 4-1-9-2, a transverse pipeline III-1-10 is arranged at the upper end of the inner surface of the valve plate groove II 4-1-8, the transverse pipeline III 4-1-10 is communicated with the vertical pipeline III 4-1-4.

A valve plate 5-2 is arranged in a valve plate groove II 4-1-8 on one side of a ball core II 4-1, a protruding shaft II 4-1-9 in the valve plate groove II 4-1-8 is inserted into a blind hole 5-2-3 of the valve plate 5-2, the valve plate 5-2 is in clearance fit with the protruding shaft II 4-1-9, the valve plate 5-2 can horizontally move on the protruding shaft II 4-1-9, the plane of the valve plate 5-2 is in clearance fit with the inner surface of the valve plate groove II 4-1-8 through a circle of protrusions 5-2-2, and a valve plate sealing ring 5-3 is arranged in a sealing groove 5-2-4 between the wall of the valve plate groove II 4-1-8 and the valve plate 5-2; the vertical pipeline III 4-1-4 of the spherical core II 4-1 is communicated with a cavity between the valve plate 5-2 and the inner surface of the valve plate groove I5-1-8 through the horizontal pipeline III 4-1-10.

The ball core 5 of the double-movable valve plate is arranged in a cavity of a left valve body 1, two parallel planes I3-1 on a large-diameter cylinder of a control rod 3 are arranged in a strip-shaped control rod groove I5-1-2 of the ball core I5-1, a round convex surface 3-2 of the control rod 3 is arranged in a round groove I5-1-3 of the ball core I5-1, a sealing ring 7 is arranged in a sealing groove I5-1-5 in the round groove I5-1-3, a vertical pipeline II 3-3 of the control rod 3 is arranged corresponding to a vertical pipeline I5-1-4 of the ball core I5-1, a sealing ring is respectively arranged in a groove above and below a small-diameter cylinder horizontal pipeline II 3-4, and a handle 3-6 is inserted in a small-diameter cylinder handle hole 3-5; a pin shaft 9 is placed in a pin shaft hole 5-1-6 through an adjusting screw hole 5-7, the lower end of the pin shaft 9 is positioned in a copper sleeve 8 in a copper sleeve blind hole 1-2 of a left valve body 1 through the matching of an adjusting screw 10 and the adjusting screw hole 5-7, and the position of a ball core 5 in the left valve body is adjusted through the height position of the adjusting screw 10, so that the center of the ball core 5 is ensured to be coincided with the spherical center of an inner cavity of the left valve body 1; the right valve body 2 and the left valve body 1 are fixed together through a plurality of inner hexagonal bolts 6, the spherical surface of the spherical core 5 of the double-movable valve plate is in clearance fit with the valve cavities of the right valve body 2 and the left valve body 1, and a sealing ring is arranged between the right valve body 2 and the left valve body 1.

The left port of the three-way ball valve 11 is connected with the left connecting pipe orifice 1-3 of the left valve body 1 through a left connecting pipe 12, the right port of the three-way ball valve 11 is connected with the right connecting pipe orifice 2-1 of the right valve body 2 through a right connecting pipe 13, and the lower port of the three-way ball valve 11 is connected with the valve core pipe orifice 1-1-1 of the left valve body 1 through a valve core connecting pipe 14.

The fluid channel of the ball core 5 of the double-movable valve plate is as follows: when the fluid pipeline of the right valve body 2 is high-pressure fluid, the three-way ball valve 11 is cut to enable the lower port of the three-way ball valve to be communicated with the right port, the lower port of the three-way ball valve is not communicated with the left end, the high-pressure fluid pipeline of the right valve body 2 is communicated with the cavity between the two valve plates 5-2 of the ball core I5-1 and the inner surfaces of the two valve plate grooves I5-1-8 through the right connecting pipe 13, the right port of the three-way ball valve 11, the lower port, the valve core connecting pipe 14, the horizontal pipeline II 3-4, the vertical pipeline II 3-3, the vertical pipeline I5-1-4, the two horizontal pipelines I5-1-10 and the ball core I5-1 in sequence, the high-pressure fluid jointly pushes the valve plates to move towards the sealing surface of the left valve body and is tightly attached to the sealing surface, and the ball valve is completely closed; the three-way ball valve 11 is switched to enable the lower end of the three-way ball valve to be communicated with the left port, the lower end of the three-way ball valve is not communicated with the right end, a fluid pipeline of the left valve body 1 sequentially passes through a left connecting pipe 12, the left port and the lower port of the three-way ball valve 11, a valve core connecting pipe 14, transverse pipelines II 3-4, vertical pipelines II 3-3, vertical pipelines I5-1-4, two transverse pipelines I5-1-10, a ball core I5-1, two valve plates 5-2 and cavities between the inner surfaces of the two valve plate grooves I5-1-8, high-pressure fluid in the control cavities is discharged to the left connecting pipe 12, the valve plates 5-2 retreat into the valve plate grooves, the control rods are rotated by 3 degrees and 90 degrees through a handle 3-6, and the ball valve is completely opened.

Or the ball core 4 of the single movable valve plate is arranged in the cavity of the left valve body 1, two planes I3-1 of a large-diameter cylinder of the control rod 3 are arranged in a strip-shaped control rod groove II 4-1-2 of the ball core II 4-1, the circular convex surface 3-2 of the control rod 3 is arranged in a circular groove II 4-1-3 of the ball core II 4-1, a sealing ring 7 is arranged in a sealing groove II 4-1-5 in the circular groove II 4-1-3, a vertical pipeline II 3-3 of the control rod 3 is correspondingly arranged with a vertical pipeline III 4-1-4 of the ball core II 4-1, a sealing ring is respectively arranged in the upper groove and the lower groove of a small-diameter cylinder horizontal pipeline II 3-4, and a handle 3-6 is inserted in a handle hole 3-5 of the small-diameter cylinder; the pin shaft 9 is placed in the pin shaft hole 5-1-6 through the adjusting screw hole 5-7, and the lower end of the pin shaft 9 is positioned in the copper sleeve 8 in the copper sleeve blind hole 1-2 of the left valve body 1 through the matching of the adjusting screw 10 and the adjusting screw hole 5-7; the right valve body 2 and the left valve body 1 are fixed together through a plurality of screws 6, the spherical surface of the spherical core 4 of the single movable valve plate is in clearance fit with the valve cavities of the right valve body 2 and the left valve body 1, and a sealing ring is arranged between the right valve body 2 and the left valve body 1.

The left port of the three-way ball valve 11 is connected with a left connecting pipe orifice 1-3 of a left valve body 1 through a left connecting pipe 12, the right port of the three-way ball valve 11 is connected with a right connecting pipe orifice 2-1 of a right valve body 2 through a right connecting pipe 13, and the lower port of the three-way ball valve 11 is connected with a right connecting pipe orifice 2-1 of the right valve body 2 through a valve core connecting pipe 14.

The fluid channel of the single movable valve plate ball core 4 is as follows: when the fluid pipeline of the right valve body 2 is high-pressure fluid, the three-way ball valve 11 is switched to enable the lower end of the three-way ball valve to be communicated with the right port and the lower end of the three-way ball valve to be blocked, the fluid pipeline of the right valve body 2 is communicated with the left port sequentially through a right connecting pipe 13, the right port of the three-way ball valve 11, the lower port, a valve core connecting pipe 14, a transverse pipeline II 3-4, a vertical pipeline II 3-3, a vertical pipeline III 4-1-4 and a transverse pipeline III 4-1-10, and a cavity between a valve plate 5-2 of a ball core II 4-1 and the inner surface of a valve plate groove II 4-1-8, the valve plate is pushed to move towards the sealing surface of the left valve body by the resultant force of the high-pressure fluid and is tightly attached to the sealing surface, and the ball valve is completely closed; switching a three-way ball valve 11 to enable the lower end of the three-way ball valve to be communicated with a left port and the lower end of the three-way ball valve to be not communicated with a right end, enabling a fluid pipeline of a left valve body 1 to be communicated with a cavity between a valve plate 5-2 and the inner surface of a valve plate groove sequentially through a left connecting pipe 12, the left port and the lower port of the three-way ball valve 11, a valve core connecting pipe 14, a transverse pipeline II 3-4, a vertical pipeline II 3-3, a vertical pipeline III 4-1-4 and a transverse pipeline III-1-10, and rotating a control rod 3 degrees by 90 degrees through a handle 3-6 to completely open the ball valve.

A use method of a ball valve with a movable valve plate comprises the following steps: the use method of the ball core 5 of the double-movable valve plate;

1. opening the ball valve, as shown in fig. 3; when the fluid pipeline of the right valve body 2 has high-pressure fluid, the three-way ball valve 11 is switched to enable the lower port of the three-way ball valve to be communicated with the left port, the lower port is not communicated with the right end, the high-pressure fluid in a cavity between two valve plates 5-2 of the ball core I5-1 and the inner surfaces of two valve plate grooves I5-1-8 sequentially passes through two transverse pipelines I5-1-10, a vertical pipeline I5-1-4, a vertical pipeline II 3-3, a transverse pipeline II 3-4, a valve core pipe orifice 1-1, a valve core connecting pipe 14, the lower port of the three-way ball valve 11, the left port, a left connecting pipe 12 and a left connecting pipe orifice 1-3 to discharge the pressure in the control cavity, and because the pressure in the control cavity is discharged, the resultant force exerted on the two valve plates 5-2 enables the two valve plates 5-2 to return to the two valve plate grooves I5-1-8, the cambered surfaces 5-2-1 of the two valve plates 5-2 are lower than the surface of the ball core I5-1, the valve plates are not in contact with the valve body, the control rod is rotated for 3 degrees to 90 degrees, a fluid channel I5-1-1 of the ball core I5-1 is communicated with fluid pipelines on two sides of the left valve body 1 and the right valve body 2, and the ball valve is completely opened;

2. closing the ball valve, as shown in fig. 2;

the control rod 3 is rotated by an angle of 90 degrees through the handle 3-6, the three-way ball valve 11 is switched, the lower port of the three-way ball valve is communicated with the right port, the lower port is not communicated with the left port, high-pressure fluid in a pipeline of the right valve body 2 sequentially passes through the right connecting pipe orifice 2-1, the right connecting pipe 13, the right port of the three-way ball valve 11, the lower port, the valve core connecting pipe 14, the valve core pipe orifice 1-1-1, the transverse pipeline II 3-4, the vertical pipeline II 3-3, the vertical pipeline I5-1-4 and the two transverse pipelines I5-1-10 to enter a cavity between the two valve plates 5-2 of the ball core I5-1 and the inner surfaces of the two valve plate grooves I5-1, the high-pressure fluid pushes the left valve plate 5-2 to move towards the sealing surface of the left valve body 1, the right valve plate is in a floating state, and the left valve plate 5-2 is pushed by the fluid to combine force, the annular sealing surface 5-2-5 of the left valve plate 5-2 is tightly attached to the sealing surface 1-4 of the left valve body 1, so that reliable sealing is achieved, and the ball valve is completely closed; when the fluid pipeline of the left valve body 1 is high-pressure fluid, the opening and closing principles of the ball valve are the same, and the operation actions are opposite.

The use method of the single movable valve plate ball core 4 comprises the following steps:

1. opening the ball valve, as shown in fig. 5;

when high-pressure fluid is in the fluid pipeline of the right valve body 2, the three-way ball valve 11 is switched to enable the lower port of the three-way ball valve to be communicated with the left port, the lower port of the three-way ball valve is not communicated with the right port, the high-pressure fluid in the cavity between the valve plate 5-2 and the inner surface of the valve plate groove 4-1-9 sequentially passes through the horizontal pipeline III 4-1-10, the vertical pipeline III 4-1-4, the vertical pipeline II 3-3, the horizontal pipeline II 3-4, the valve core pipe orifice 1-1, the valve core connecting pipe 14, the lower port of the three-way ball valve 11, the left port, the left connecting pipe 12 and the left connecting pipe orifice 1-3 to discharge the pressure in the control cavity, because the pressure in the valve core control cavity is discharged, the left valve plate 5-2 is pushed by the resultant force of the fluid to retreat the valve plate 5-2 into the valve plate groove I5-1-8, the cambered surface 5-2-1 of the valve plate 5-2 is lower than the surface of the ball core II 4-1, the valve plate is not in contact with the valve body, the control rod is rotated by 3 degrees and 90 degrees, the fluid channel II 4-1-1 of the ball core II 4-1 is communicated with the fluid channels on the two sides of the left valve body 1 and the right valve body 2, and the ball valve is completely opened;

2. closing the ball valve, as shown in fig. 4;

the control rod is rotated by an angle of 90 degrees through the handle 3-6, the three-way ball valve 11 is switched, the lower port of the three-way ball valve is communicated with the right port, the lower port is not communicated with the left port, high-pressure fluid of a fluid pipeline of the right valve body 2 sequentially passes through the right connecting pipe orifice 2-1, the right connecting pipe 13, the right port of the three-way ball valve 11, the lower port, the valve core connecting pipe 14, the valve core pipe orifice 1-1, the transverse pipeline II 3-4, the vertical pipeline II 3-3, the vertical pipeline III 4-1-4 and the transverse pipeline III 4-1-10 to enter a cavity between the valve plate 5-2 of the ball core II 4-1 and the inner surface of the valve plate groove II 4-1-8, the high-pressure fluid pushes the valve plate 5-2 to move towards the sealing surface of the left valve body 1, the valve plate 5-2 is pushed by the resultant force of the fluid, and the annular sealing surface 5-2-5 of the valve plate 5 is tightly jointed with the sealing surface of the left valve body 1-4, reliable sealing is achieved, and the ball valve is completely closed.

Claims (8)

1. The utility model provides a ball valve of area activity valve plate, includes left valve body (1), right valve body (2) and control lever (3), its characterized in that: the valve core of the movable valve plate comprises a single-movable valve plate ball core (4) or a double-movable valve plate ball core (5);

the ball core (5) of the double-movable valve plate is arranged in the cavity of the left valve body (1), one end of the control rod (3) is arranged in a strip-shaped control rod groove I (5-1-2) of the ball core I (5-1), the round convex surface (3-2) of the control rod (3) is arranged in a round groove I (5-1-3) of the ball core I (5-1), a sealing ring (7) is arranged in a sealing groove I (5-1-5) in the circular groove I (5-1-3), a vertical pipeline II (3-3) of the control rod (3) is arranged corresponding to the vertical pipeline I (5-1-4) of the ball core I (5-1), the pin shaft (9) is arranged in the pin shaft hole (5-1-6), and the lower end of the pin shaft (9) is positioned in the copper sleeve (8) in the copper sleeve blind hole (1-2) of the left valve body (1) by the adjusting screw (10); or the ball core (4) of the single movable valve plate is arranged in the cavity of the left valve body (1), one end of the control rod (3) is arranged in the strip-shaped control rod groove II (4-1-2) of the ball core II (4-1), the round convex surface (3-2) of the control rod (3) is arranged in the round groove II (4-1-3) of the ball core II (4-1), a sealing ring (7) is arranged in a sealing groove II (4-1-5) in the circular groove II (4-1-3), a vertical pipeline II (3-3) of the control rod (3) is arranged corresponding to a vertical pipeline III (4-1-4) of the ball core II (4-1), the pin shaft (9) is arranged in the pin shaft hole (5-1-6), and the lower end of the pin shaft (9) is positioned in the copper sleeve (8) in the copper sleeve blind hole (1-2) of the left valve body (1) by the adjusting screw (10); the right valve body (2) and the left valve body (1) are fixed together, and the spherical surface of the spherical core (5) of the double-movable valve plate or the spherical core (4) of the single-movable valve plate is in clearance fit with the valve cavities of the right valve body (2) and the left valve body (1); the left port of the three-way ball valve (11) is connected with a left connecting pipe orifice (1-3) of the left valve body (1) through a left connecting pipe (12), the right port of the three-way ball valve (11) is connected with a right connecting pipe orifice (2-1) of the right valve body (2) through a right connecting pipe (13), and the lower port of the three-way ball valve (11) is connected with a valve core pipe orifice (1-1-1) of the left valve body (1) through a valve core connecting pipe (14);

the fluid channel of the ball core (5) of the double-movable valve plate is as follows:

when high-pressure fluid exists in a fluid pipeline of the right valve body (2), the three-way ball valve (11) is switched to enable the lower port of the three-way ball valve to be communicated with the right port, the lower port of the three-way ball valve is not communicated with the left end, the high-pressure fluid pipeline of the right valve body (2) sequentially passes through a right connecting pipe (13), the right port of the three-way ball valve (11), the lower port, a valve core connecting pipe (14), a transverse pipeline II (3-4), a vertical pipeline II (3-3), a vertical pipeline I (5-1-4), two transverse pipelines I (5-1-10) and cavities between two valve plates (5-2) of a ball core I (5-1) and the inner surfaces of two valve plate grooves I (5-1-8) to be communicated, and the ball valve is completely closed;

the three-way ball valve (11) is switched to ensure that the lower port of the three-way ball valve is communicated with the left port and the lower port is not communicated with the right end, a fluid pipeline of the left valve body (1) sequentially passes through a left connecting pipe (12), the left port of the three-way ball valve (11), the lower port and a valve core connecting pipe (14), the horizontal pipeline II (3-4), the vertical pipeline II (3-3), the vertical pipeline I (5-1-4), the two horizontal pipelines I (5-1-10), the ball core I (5-1), the two valve plates (5-2) and the cavities between the inner surfaces of the two valve plate grooves I (5-1-8) are communicated, the angle of the rotary control rod (3) is 90 degrees, the fluid channel I (5-1-1) of the ball core I (5-1) is communicated with the fluid pipelines on the two sides of the left valve body (1) and the right valve body (2), and the ball valve is completely opened;

the fluid passage of the single movable valve plate ball core (4) is as follows: when the fluid pipeline of the right valve body (2) is high-pressure fluid, the three-way ball valve (11) is switched to enable the lower end of the three-way ball valve to be communicated with the right port and the lower end of the three-way ball valve to be not communicated with the left port, the high-pressure fluid pipeline of the right valve body (2) is communicated with the cavity between the valve plate (5-2) of the ball core II (4-1-8) and the valve plate groove II (4-1-8) through a right connecting pipe (13), the right port and the lower port of the three-way ball valve (11), a transverse pipeline II (3-4), a vertical pipeline II (3-3), a vertical pipeline III (4-1-4) and a transverse pipeline III (4-1-10) in sequence, and the ball valve is completely closed; and switching the three-way ball valve (11) to enable the lower end of the three-way ball valve to be communicated with the left port and the lower end of the three-way ball valve to be not communicated with the right end, wherein a fluid pipeline of the left valve body (1) sequentially passes through the left connecting pipe (12), the left port and the lower port of the three-way ball valve (11), the valve core connecting pipe (14), the transverse pipeline II (3-4), the vertical pipeline II (3-3), the vertical pipeline III (4-1-4), the transverse pipeline III (4-1-10) and a cavity between the valve plate (5-2) and the inner surface of the valve plate groove (4-1-8), rotating the control rod (3) by an angle of 90 degrees, and completely opening the ball valve.

2. A ball valve with a movable valve plate according to claim 1, wherein: a valve core pipe orifice (1-1-1) is arranged on the wall of a control rod sleeve (1-1) at the upper end of the left valve body (1), a copper sleeve blind hole (1-2) is arranged at the lower end of the left valve body (1), and a left connecting pipe orifice (1-3) is arranged on a fluid pipeline of the left valve body (1); and a right connecting pipe orifice (2-1) is arranged on the fluid pipeline of the right valve body (2).

3. A ball valve with a movable valve plate according to claim 1, wherein: the lower end of the control rod (3) is a large-diameter cylinder, the upper end of the control rod is a small-diameter cylinder, two corresponding surfaces of the large-diameter cylinder are planes I (3-1), a section of vertical pipeline II (3-3) is arranged on a circular convex surface (3-2) of the lower end surface of the large-diameter cylinder, a through transverse pipeline II (3-4) is arranged on the small-diameter cylinder, and the transverse pipeline II (3-4) is communicated with the vertical pipeline II (3-3).

4. A ball valve with a movable valve plate according to claim 1, wherein: the double-movable valve plate ball core (5) comprises a ball core I (5-1), a valve plate (5-2) and a valve plate sealing ring (5-3); the valve plate grooves I (5-1-8) on two sides of the ball core I (5-1) are respectively provided with a valve plate (5-2), the projecting shafts I (5-1-9) in the two valve plate grooves I (5-1-8) are respectively inserted into the blind holes (5-2-3) of the two valve plates (5-2) to be in clearance fit, the two valve plates (5-2) can horizontally move on the two projecting shafts I (5-1-9), the planes of the two valve plates (5-2) are in clearance fit with the inner surfaces of the valve plate grooves I (5-1-8) through a circle of projections (5-2-2), a valve plate sealing ring (5-3) is respectively arranged in the sealing groove (5-2-4) between the wall of the valve plate groove I (5-1-8) and the valve plate (5-2); the vertical pipeline I (5-1-4) of the ball core I (5-1) is communicated with the cavity between the two valve plates (5-2) and the inner surfaces of the two valve plate grooves I (5-1-8) through the two transverse pipelines I (5-1-10).

5. A ball valve with a movable valve plate according to claim 1, wherein: the single movable valve plate ball core (4) comprises a ball core II (4-1), a valve plate (5-2) and a valve plate sealing ring (5-3); a valve plate (5-2) is arranged in a valve plate groove II (4-1-8) on one side of the ball core II (4-1), a projecting shaft II (4-1-9) in the valve plate groove II (4-1-8) is inserted into a blind hole (5-2-3) of the valve plate (5-2) to be in clearance fit, the valve plate (5-2) can move horizontally on the projecting shaft II (4-1-9), the plane of the valve plate (5-2) is in clearance fit with the inner face of the valve plate groove II (4-1-8) through a circle of projections (5-2-2), and a valve plate sealing ring (5-3) is arranged in a sealing groove (5-2-4) between the wall of the valve plate groove II (4-1-8) and the valve plate (5-2); the vertical pipeline III (4-1-4) of the ball core II (4-1) is communicated with a cavity between the valve plate (5-2) and the valve plate groove I (5-1-8) through the horizontal pipeline III (4-1-10).

6. A ball valve with a movable valve plate according to claim 4 or 5, characterized in that: the valve plate (5-2) is a circular plate, one surface of the valve plate is an arc surface (5-2-1), the other surface of the valve plate is a plane, a circle of protrusions (5-2-2) are arranged along the edge of the plane, a blind hole (5-2-3) is arranged at the center of the plane, a circle of sealing groove (5-2-4) is arranged on the outer circular surface between the arc surface (5-2-1) and the plane, and an annular sealing surface (5-2-5) is arranged on the outer circular side of the arc surface (5-2-1).

7. A ball valve with a movable valve plate according to claim 4, characterized in that: the ball core I (5-1) is a spherical body, a communicated fluid channel I (5-1-1) is arranged on a spherical surface corresponding to the ball core I (5-1), a strip-shaped control rod groove I (5-1-2) is arranged on the spherical surface at the upper end of the fluid channel I (5-1-1), a round groove I (5-1-3) is arranged in the control rod groove I (5-1-2), a vertical pipeline I (5-1-4) is arranged at the center in the round groove I (5-1-3), and a circle of sealing groove I (5-1-5) is arranged on the groove surface at the periphery of the vertical pipeline I (5-1-4);

the spherical surface at the lower end of the fluid channel I (5-1-1) is provided with a pin shaft hole I (5-1-6) and an adjusting screw hole I (5-1-7) which are communicated, the spherical surfaces at the two sides of the fluid channel I (5-1-1) are correspondingly provided with a circular valve plate groove I (5-1-8) respectively, the centers of the inner surfaces of the two valve plate grooves I (5-1-8) are provided with a protruding shaft I (5-1-9) respectively, the two protruding shafts I (5-1-9) are provided with exhaust holes (5-1-9-1) and exhaust inclined holes (5-1-9-2) respectively, the exhaust holes (5-1-9-1) are communicated with the valve plate grooves I (5-1-8) through the exhaust inclined holes (5-1-9-2), the upper ends of the inner surfaces of the two valve plate grooves I (5-1-8) are respectively provided with a transverse pipeline I (5-1-10), and the two transverse pipelines I (5-1-10) are communicated with a vertical pipeline I (5-1-4).

8. A ball valve with a movable valve plate according to claim 5, characterized in that: the ball core II (4-1) is a spherical body, a communicated fluid channel II (4-1-1) is arranged on a spherical surface corresponding to the ball core II (4-1), a strip-shaped control rod groove II (4-1-2) is arranged on the spherical surface at the upper end of the fluid channel II (4-1-1), a round groove II (4-1-3) is arranged in the control rod groove II (4-1-2), a vertical pipeline III (4-1-4) is arranged at the center in the round groove II (4-1-3), and a circle of sealing groove II (4-1-5) is arranged on the groove surface at the periphery of the vertical pipeline III (4-1-4);

a pin shaft hole II (4-1-6) and an adjusting screw hole II (4-1-7) which are communicated are arranged on the spherical surface at the lower end of the fluid channel II (4-1-1), a round valve plate groove II (4-1-8) is arranged on the spherical surface at one side of the fluid channel II (4-1-1), a protruding shaft II (4-1-9) is arranged at the center of the inner surface of the valve plate groove II (4-1-8), exhaust holes II (4-1-9-1) and exhaust inclined holes II (4-1-9-2) are respectively arranged on the two protruding shafts II (4-1-9), the exhaust holes II (4-1-9-1) are communicated with the valve plate groove II (4-1-8) through the exhaust inclined holes II (4-1-9-2), the upper end of the inner surface of the valve plate groove II (4-1-8) is provided with a transverse pipeline III (4-1-10), and the transverse pipeline III (4-1-10) is communicated with the vertical pipeline III (4-1-4).

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