CN220378929U - Friction-free ball valve ball - Google Patents

Abstract

The utility model discloses a friction-free opening and closing ball valve ball body, which comprises a valve core body, wherein a medium passing hole is formed in the valve core body, and a valve seat pushing mechanism is arranged on the valve core body; the valve seat pushing mechanism comprises a valve seat pushing piece, the valve seat pushing piece comprises a pair of rotating through grooves, round holes are formed in the upper side and the lower side of the valve core body, a cylinder is inserted in each of the two round holes, a round pipe is arranged on the cylinder, an oval through hole is formed in the round pipe, an oval pipe is arranged in the oval through hole, a channel cavity is formed in the oval pipe, a fixing block is arranged at the end of the channel cavity, a threaded rod is connected to the fixing block in a threaded mode, a shaft rod is arranged on the threaded rod, a seat bearing is arranged on the round pipe, the shaft rod is matched with the seat bearing, a first bevel gear is arranged at the side end of the shaft rod, a first servo motor is arranged in the cylinder, and a second bevel gear is arranged on the rotating shaft of the first servo motor. The utility model has no friction with the spherical surface of the valve core in the full opening or closing process of the ball valve, thereby greatly prolonging the service life of the sealing ring and further prolonging the service life of the ball valve.

Description

Friction-free ball valve ball

Technical Field

The utility model relates to the field of high-end assembly, in particular to a start-stop piece, and especially relates to a friction-free start-stop ball valve sphere.

Background

The ball valve, the opening and closing piece (sphere) is driven by the valve rod, and the valve rotates around the axis of the ball valve; the device can also be used for regulating and controlling the fluid; the ball valve is more and more wide in application due to stability, high pressure resistance and convenient processability, along with increasing high pressure and high performance of the current working condition environment, along with increasing of working pressure of the ball valve application, the operation moment of the ball valve is larger and larger, the test of a sealing ring is also increased, the current ball valve is characterized in that under the high pressure medium working condition, the sealing ring at the pressure receiving side and the bottom of the sealing ring are subjected to high pressure of a valve core, the valve core is required to be rotated in the process of closing or opening a pipeline, the valve core is enabled to be extremely high in friction resistance with the sealing ring in the process of rotating due to the high medium pressure, the sealing ring is excessively worn due to high friction resistance, frequent closing of the pipeline is required for safety of the pipeline, the sealing ring is replaced, and maintenance cost and production cost are greatly increased, so that the benefits of enterprises and the production and the life of people are not facilitated.

The Chinese patent No. 203189774U discloses a ball valve structure for keeping the interior of the ball valve clean, wherein the ball valve comprises a valve body, a valve rod and a valve ball arranged in the valve body, one end of the valve rod is fixedly connected with the valve ball, the other end of the valve rod extends out of the valve body, the valve rod and the valve body form a seal, a sealing ring is arranged between the valve ball and the valve body, a water inlet end and a water outlet end are arranged on the valve body, a channel capable of conducting the water inlet end and the water outlet end is arranged in the valve ball, a cavity is formed among the valve body, the valve rod, the valve ball and the sealing ring, and a through hole which enables the cavity to be communicated with the channel is formed at the bottom of the valve ball. When the ball valve structure is used for working conditions of high-pressure media, the friction force of the valve core on the sealing ring is extremely high, the sealing ring needs to be replaced frequently, and the maintenance cost is greatly increased.

Disclosure of Invention

The utility model aims to solve the defects of the prior art, and provides the friction-free opening and closing ball valve ball body with long service life of the sealing ring in the high-pressure medium and frequent opening and closing open environment, so that the requirements of no abrasion to the sealing ring of the valve seat, greatly reduced replacement frequency of the sealing ring and reduced production cost in the high-pressure medium working condition and the frequent opening and closing process are met.

The utility model solves the technical problems by adopting the technical scheme that: the friction-free opening and closing ball valve sphere comprises a valve core body, wherein a medium passing hole is formed in the valve core body, and a valve seat pushing mechanism is arranged on the valve core body; the valve seat pushing mechanism comprises a valve seat pushing piece which is arranged up and down, the valve seat pushing piece comprises a pair of rotating through grooves which are arranged at an included angle of 180 degrees, the rotating through grooves are arranged in a sector shape of 90 degrees along the valve core body, round holes are formed in the upper side and the lower side of the valve core body, a cylinder is inserted in each round hole, round pipes which are respectively matched with the two rotating through grooves are formed in the round pipes, oval through holes are formed in the round pipes, oval pipes are inserted in the oval through holes, a channel cavity is formed in the oval pipes, a fixing block is fixed at the end part of the channel cavity, a threaded rod is connected onto the fixing block in a threaded manner, a shaft rod which is coaxially arranged with the threaded rod is fixed at the end part of the round pipe, a seat bearing is fixed on the round pipe, the shaft rod is matched with the seat bearing, a first bevel gear is fixed at the side end of the shaft rod, a first servo motor is fixed in the cylinder, and a second bevel gear which is meshed with the first bevel gear is fixed on the rotating shaft of the first servo motor; square holes with the cross section larger than that of the round holes are formed in the top ends of the round holes. Here the function of the medium passage holes is for opening or blocking of the medium; the valve seat pushing mechanism has the advantages that the sealing ring on the valve seat is separated from the spherical surface of the valve seat in the opening or closing process of the valve core, and the sealing ring on the valve seat is pressed and sealed on the spherical surface of the valve core again when the valve core is at the full-opening position or the full-closing position, so that the sealing at the full-opening position and the full-closing position of the ball valve is achieved, the valve core can rotate without high resistance friction with the sealing ring, the service life of the sealing ring is greatly prolonged, the service life of the ball valve is greatly prolonged, the sealing ring is only required to be replaced when the sealing ring is aged, the maintenance cost of the ball valve is greatly reduced, and the enterprise benefit is increased; the working principle of the valve seat pushing mechanism is as follows: when the valve core is required to be closed, only the two first servo motors are required to be controlled to be synchronously started, so that the second bevel gears on the two first servo motors synchronously rotate clockwise, so that the first bevel gears are driven to rotate clockwise, the shaft lever is driven to rotate synchronously, the threaded rod is driven to rotate clockwise, the threaded rod rotates to drive the fixed block to move (because the elliptical tube is matched with the elliptical through hole, the elliptical tube cannot rotate, the threaded rod only drives the elliptical tube to move when rotating), the elliptical tube is driven to move and the valve seats on the two sides are synchronously pushed, the compression spring is pressed to store energy, the sealing ring on the valve seat can also break away from the pressing action on the spherical surface of the valve core, then the valve rod is rotated, so that the valve core is driven to rotate, and the cylinder is in an immobilized state, when the valve rod drives the valve core to rotate anticlockwise, the circular tube is enabled to rotate through the rotation groove, the valve core is not to collide with the circular tube, the valve core is enabled to rotate in the closing position of the pipeline through the reverse rotation of the first servo motor, the elliptical tube is enabled to move backwards and reset, the valve seat is enabled to reset through the reset force of the compression spring, and the valve seat is enabled to be reset and the spherical surface to be pressed again, as shown in the figure 7, the sealing ring is enabled to have the great service life, and the sealing ring is enabled to be greatly prolonged, and the service life of the sealing ring is enabled to be greatly prolonged; the square hole is used for plugging the square block on the valve rod, so that the valve core can be efficiently driven to rotate.

Further perfecting, the cylinder is fixed with a supporting rod. The action of the supporting rod is that the supporting rod is fixed on the valve body, so that the cylinder is in a fixed state, the cylinder is fixed when the valve core rotates, and the valve seat is pushed away, so that the sealing ring is separated from the spherical surface of the valve core in the rotating process of the valve core, high abrasion of the sealing ring is avoided, the service life of the sealing ring is greatly prolonged, and the service life of the ball valve is prolonged.

Further perfecting, the oval through hole is provided with a first self-lubricating layer. The first self-lubricating layer has the effects that when the oval tube moves in the oval through hole, the friction resistance is small, the oval tube is easier to drive to move, and the situation that the oval tube is blocked when moving can be avoided; the first self-lubricating layer is made of tin bronze material

Further perfecting, the outer surfaces of the two cylinders are provided with a second self-lubricating layer. The second self-lubricating layer has the function of enabling the friction force between the valve core and the cylinder to be small when the valve core rotates, and saving more labor when the valve core rotates; the second self-lubricating layer is made of tin bronze material.

Further perfecting, the thrust bearing is arranged at the bottom of the valve core body. The thrust bearing has the function of giving the ball longitudinal support, so that the problem that the service life of the sealing ring is low due to excessive abrasion of the lower part of the sealing ring when the valve core rotates due to the fact that the weight of the valve core is pressed on the lower part of the sealing ring is avoided.

The beneficial effects of the utility model are as follows:

1) The sealing ring can be separated from the spherical surface of the valve core in the process of rotating the valve core, so that the high abrasion of the sealing ring is reduced, and the service life of the sealing ring is greatly prolonged;

2) The sealing ring can be pressed on the spherical surface of the valve core again when the valve core is in a full-open or full-closed position state, so that the valve core can be sealed again;

3) The valve core can be longitudinally supported through the thrust bearing, so that the weight of the valve core is prevented from being pressed at the bottom of the sealing ring, and the excessive rapid abrasion of the sealing ring is further increased when the valve core rotates;

4) The valve core can be transversely subjected to medium impact resistance, so that the problem that the valve core is displaced and pressed at the sealing ring on the pressed side, the friction resistance is increased, the abrasion of the sealing ring is greatly increased, and the service life of the sealing ring is prolonged is solved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an enlarged partial view of area A of FIG. 1;

FIG. 3 is an enlarged partial view of region B of FIG. 1;

FIG. 4 is an enlarged partial view of region C of FIG. 1;

FIG. 5 is a perspective view of the present utility model with the upper stem square block portion installed;

FIG. 6 is a second perspective view of the present utility model with the valve stem installed;

FIG. 7 is a flow chart illustrating the operation of the present utility model;

fig. 8 is a state diagram of the present utility model when it is installed on a valve.

Reference numerals illustrate: the valve core body 1, medium through hole 1-1, round hole 1-2, square hole 1-3, valve seat pushing mechanism 2, valve seat pushing piece 2-1, rotary through groove 2-1a, cylinder 2-1b, support rod 2a-1b, round tube 2-1c, oval through hole 2a-1c, first self-lubricating layer 2b-1c, oval tube 2-1d, channel cavity 2a-1d, fixed block 2-1e, threaded rod 2-1f, shaft lever 2a-1f, first bevel gear 2-1h, first servo motor 2-1j, second bevel gear 2a-1j, second self-lubricating layer 2-1k, thrust bearing 3, valve rod 4, support column 5, compression spring 6, through port 7.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

referring to the drawings: the friction-free opening and closing ball valve sphere comprises a valve core body 1, wherein a medium passing hole 1-1 is formed in the valve core body 1, and a valve seat pushing mechanism 2 is arranged on the valve core body 1; the valve seat pushing mechanism 2 comprises a valve seat pushing piece 2-1 which is arranged up and down, the valve seat pushing piece 2-1 comprises a pair of rotary through grooves 2-1a which are arranged at an included angle of 180 degrees, the rotary through grooves 2-1a are arranged in a 90-degree fan shape along the valve core body 1, round holes 1-2 are formed in the upper side and the lower side of the valve core body 1, a cylinder 2-1b is inserted in each of the two round holes 1-2, a round tube 2-1c which is respectively matched with the two rotary through grooves 2-1a is fixed on the cylinder 2-1b, an oval through hole 2a-1c is formed in the round tube 2-1c, a channel cavity 2a-1d is arranged in the oval tube 2-1d, a fixed block 2-1e is fixed at the end of the channel cavity 2a-1d, a threaded rod 2-1f is connected to the fixed block 2-1e, a bevel gear 2a-1f is fixed at the end of the threaded rod 2 f, a bevel motor 2a-1f is respectively matched with the bevel gear 2a fixed on the first side of the bevel gear wheel 2-1g, and a motor 2 j is fixed at the first side of the bevel gear 2 h 2 g-1 h, and a second side of the bevel gear 2 j is fixed on the bevel gear 1g 2 h; the top end of the round hole 1-2 is provided with a square hole 1-3 with a section larger than that of the round hole 1-2.

The cylinder 2-1b is fixed with a support rod 2a-1b.

The elliptical through holes 2a-1c are provided with a first self-lubricating layer 2b-1c.

The outer surfaces of the two cylinders 2-1b are provided with a second self-lubricating layer 2-1k.

The thrust bearing 3 is installed at the bottom of the valve core body 1.

The working principle of the utility model is as follows: when the valve core is required to be closed, only the two first servo motors 2-1j are required to be controlled to be synchronously started, so that the second bevel gears 2a-1j on the two first servo motors 2-1j synchronously rotate clockwise, so that the first bevel gears 2-1h are driven to rotate clockwise, the shaft rod 2a-1f is driven to rotate synchronously, the threaded rod 2-1f is driven to rotate clockwise, the threaded rod 2-1f rotates to drive the fixed block 2-1e to move (because the elliptical tube 2-1d is matched with the position of the elliptical through hole 2a-1d, the elliptical tube 2-1d is not driven to rotate, the threaded rod 2-1f only drives the elliptical tube 2-1d to move when rotating, so that the elliptical tube 2-1d is driven to move and synchronously pushes the valve seat 4 on two sides, so that the compression spring 6 is compressed to store energy, the sealing ring 7 on the valve seat 4 is also separated from the pressing motion of the valve core body 1, the square block on the bottom of the valve rod 4 (a square block on the bottom of the valve rod 4 is rotated, a round hole on the square block is used for placing the position of the cylinder 2-1b, and the cylinder 2-1b is driven to rotate on the side of the support rod 2-1b through the square through the position of the elliptical through hole 2a 3 b, and the position of the cylinder 2-1b is not fixed on the side of the valve core 2-1b (2 b is not fixed on the side of the valve body 2-1 b) when the valve core is rotated; the lower cylinder 2-1b is fixed with the support column 5 by a fastener as shown in fig. 8), so that when the valve rod 4 drives the valve core to rotate anticlockwise, the round tube 2-1c is motionless, and when the valve core rotates through the groove 2-1a, the valve core does not collide with the round tube 2-1c, when the valve core is in the fully closed position, the elliptical tube 2-1d is backwards reset through the reverse rotation of the first servo motor 2-1j, so that the valve seat 4 is reset and the sealing ring 7 is pressed on the spherical surface of the valve core (the valve core body 1) again under the action of the reset force of the compression spring 6, and the sealing effect is achieved (as shown in fig. 7 and 8), so that friction is not generated between the valve core and the sealing ring 7 in the rotating process of the valve core, the service life of the sealing ring 7 is greatly prolonged, the service life of the ball valve is greatly prolonged, the enterprise benefit is greatly improved, the maintenance cost is reduced, and the valve is worthy of popularization and application.

While the utility model has been shown and described with reference to a preferred embodiment, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the utility model.

Claims (5)

1. The utility model provides a no friction opens and close ball valve spheroid, includes case body (1), it has medium through hole (1-1), characterized by to open on case body (1): a valve seat pushing mechanism (2) is arranged on the valve core body (1);

the valve seat pushing mechanism (2) comprises a valve seat pushing piece (2-1) which is arranged up and down, the valve seat pushing piece (2-1) comprises a pair of rotating through grooves (2-1 a) which are arranged at an included angle of 180 degrees, the rotating through grooves (2-1 a) are arranged in a 90-degree fan shape along a valve core body (1), round holes (1-2) are formed in the upper side and the lower side of the valve core body (1), two round holes (1-2) are respectively inserted with a cylinder (2-1 b), round tubes (2-1 c) which are respectively matched with the two rotating through grooves (2-1 a) are fixed on the cylinders (2-1 b), oval through holes (2 a-1 c) are formed in the round tubes (2-1 c), channel cavities (2 a-1 d) are formed in the oval tubes (2-1 d) in a plugging mode, fixing blocks (2-1 e) are fixed at the ends of the channel cavities (2 a-1 d), threaded rods (2-1 f) are fixed on the end portions of the threaded rods (2-1 f) and the threaded rods (2 f) are fixed on the threaded rods (1 f), the shaft rod (2 a-1 f) is matched with the bearing (2-1 g) with the seat, a first bevel gear (2-1 h) is fixed at the side end of the shaft rod (2 a-1 f), a first servo motor (2-1 j) is fixed in the cylinder (2-1 b), and a second bevel gear (2 a-1 j) meshed with the first bevel gear (2-1 h) is fixed on the rotating shaft of the first servo motor (2-1 j);

a square hole (1-3) with the cross section larger than that of the round hole (1-2) is formed in the top end of the round hole (1-2).

2. The frictionless start-stop ball valve ball of claim 1, wherein: the cylinder (2-1 b) is fixedly provided with a supporting rod (2 a-1 b).

3. The frictionless start-stop ball valve ball of claim 1, wherein: the elliptical through holes (2 a-1 c) are provided with first self-lubricating layers (2 b-1 c).

4. The frictionless start-stop ball valve ball of claim 1, wherein: the outer surfaces of the two cylinders (2-1 b) are provided with second self-lubricating layers (2-1 k).

5. The frictionless start-stop ball valve ball of claim 1, wherein: the bottom of the valve core body (1) is provided with a thrust bearing (3).