CN216618613U

CN216618613U - Eccentric ball valve of many ball face line seal list disk seat

Info

Publication number: CN216618613U
Application number: CN202122782810.5U
Authority: CN
Inventors: 赵军铭
Original assignee: Shanghai Wolu Valve Manufacturing Co ltd
Current assignee: Shanghai Eber Fluid Technology Co ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-05-27
Anticipated expiration: 2031-11-15

Abstract

The utility model discloses a multi-spherical-surface-line-sealed single-valve-seat eccentric ball valve, which belongs to the technical field of ball valves and comprises a ball piece in multi-spherical-surface-line sealing design, wherein a sealing ring and a sealing pressing ring are sequentially arranged on one side of the ball piece, a screw A is arranged on one side of the ball piece, the sealing pressing ring is fixed on the ball piece through the screw A in a screwed mode, an accommodating groove is formed between the ball piece and the sealing pressing ring, and the sealing ring is fixed in the accommodating groove through the sealing pressing ring in an extruding mode. The sealing performance is improved by adopting multi-spherical-surface-line sealing, self-adjusting torque sealing is adopted, the sealing ring and the valve seat are in forced mechanical sealing, the sealing reliability is improved, the sealing surface is designed in a multi-spherical-surface-line sealing mode, the running friction is reduced, only one bidirectional sealing single valve seat is arranged, and the problems that the valve is leaked and stuck due to residual media and solid particles in the valve cavity, the service life is short and the like are fundamentally eliminated.

Description

Eccentric ball valve of many ball face line seal list disk seat

Technical Field

The utility model belongs to the technical field of ball valves, and particularly relates to a multi-spherical-surface-line sealed single-valve-seat eccentric ball valve.

Background

The eccentric ball valve and flanged gate valve are both of one type, and the difference is that the closing member is a ball which rotates around the central line of the valve body to open and close. Ball valves are used in pipelines primarily to shut off, distribute and change the direction of flow of a medium. The traditional double-valve-seat ball valve has the problems that the pressure of an inner cavity is increased due to the temperature change of a valve cavity medium, impurities are easily deposited in a spring hole of a valve seat to cause failure of a spring, the spring possibly generates vibration or failure due to the influence of the medium temperature and operating conditions, the opening and closing torque is increased, and the problem of valve rod locking is easily generated; when a sealing element of the ball valve goes wrong, the sealing element often needs to be returned to a factory for maintenance.

A double eccentric ball valve as proposed in CN109958791A, comprising: when the double-eccentric ball valve is in an opening state, the first valve passage, the third valve passage and the second valve passage are in a communicated state, and media can circulate, so that the medium scouring and erosion borne by the valve rod are avoided; when the double-eccentric ball valve is in a closed state, the first sealing body and the second sealing body on the valve body are respectively sealed with the first valve channel and the second valve channel, so that bidirectional sealing is realized, and the sealing performance is higher. However, the double-valve seat design can cause the pressure in the inner cavity to rise due to the temperature change of the medium in the valve cavity, and the valve rod is easily locked. Therefore, a multi-spherical-surface-line sealing single-valve-seat eccentric ball valve is provided to solve the problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a multi-spherical-surface-line sealed single-valve-seat eccentric ball valve, which aims to solve the problem that the valve rod is easy to lock due to the fact that the pressure of an inner cavity is increased due to the temperature change of a valve cavity medium in the design of a double-valve seat in the use process of the existing ball valve in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a sealed single disk seat eccentric ball valve of many ball facial lines, includes the ball spare of the sealed design of many ball facial lines, one side of ball spare has set gradually sealing ring and sealed clamping ring, one side of ball spare is provided with screw A, screw A will sealed clamping ring spiro union is fixed on the ball spare, the ball spare with form a holding tank between the sealed clamping ring, the sealing ring passes through sealed clamping ring extrusion is fixed in the holding tank, the outside of sealing ring is provided with the disk seat, the sealing ring with the surface of disk seat contact is sealed face, sealed face is the sealed design of many ball facial lines, the disk seat only sets up one, and the cooperation is used the sealing ring reaches sealed clamping ring all sets up one equally.

Preferably, each section of the sealing ring perpendicular to the central line of the channel is a perfect circle, the center of each section is eccentric to the central line of the channel, and the contact surface of the valve seat and the sealing ring is a perfect circle and eccentric to the central line of the channel.

Preferably, a screw B is arranged on the valve seat, the valve seat is fixed on the middle body through the screw B in a threaded manner, an upper valve rod is arranged at the top of the ball piece, and a lower valve rod is connected to the bottom of the ball piece.

Preferably, one end, far away from the ball piece, of the upper valve rod is in transmission connection with a gear box, one side of the middle body is connected with a left body, and the other side of the middle body is connected with a right body.

Preferably, the ball member is provided with an upper valve stem hole for accommodating the upper valve stem, and the upper valve stem hole and the upper valve stem are eccentric to a spherical center line of the ball member.

Preferably, the ball piece is provided with a through hole for fluid to pass through, the center line of the through hole is eccentric to the spherical center line of the ball piece, and the spherical center line of the ball piece is eccentric to the channel center line.

Preferably, one side of the valve seat, which is far away from the ball element, is not provided with a spring or a lip seal, and the valve seat is tightly attached to the sealing ring directly through the transmission torque of the upper valve rod and the lower valve rod.

Preferably, a hand wheel is arranged on the gear box, and the hand wheel can be rotated to drive the upper valve rod to rotate through the gear box.

Preferably, the top of the upper valve rod is provided with a key groove and a key, and the gear box drives the key to move circularly so as to drive the upper valve rod to rotate.

Preferably, the left body and the right body are both fixed on the middle body through a plurality of screw rods and nuts in a threaded manner.

Compared with the prior art, the utility model has the beneficial effects that:

1. the sealing performance is improved by adopting a multi-sphere line sealing eccentric design through the ball piece, and different from the traditional two-eccentric and three-eccentric elliptical sealing structures, the multi-sphere normal circular tangent plane eccentric ball valve adopts a normal circular sealing structure, which means that the thickness of the sealing pair part is closer to the same, and the sealing pair part always keeps the same degree of shrinkage and expansion under the fluctuation of extreme temperature, so that the stability of the sealing performance can be ensured.

2. The sealing face is the sealed design of many ball lines, and sealing ring and disk seat operation process do not have the friction, and more than 0 disk seat breaks away from with the sealing ring completely when the theory is opened, and the actual measurement 0 is broken away from with the sealing ring completely to 3 degrees disk seats, and the moment of torsion is littleer, and the sealing ring automatically cleaning disk seat surface has eliminated the wearing and tearing that welding slag, pipeline foreign matter arouse, extension valve life.

3. The device is only provided with one valve seat, and the sealing rings and the sealing press rings which are used in a matched mode are also arranged one by one, so that the situation that the double valve seats form a valve cavity is avoided, the pressure of an inner cavity is increased due to the temperature change of a medium of the valve cavity, an open type flow channel is free of cavity dead zones and valve cavity traps, special pressure relief is not needed, and the danger of the problem that the valve cavity is blocked due to the fact that the medium and solid particles are remained in the valve cavity is fundamentally eliminated.

4. The valve seat is fixed on the valve body, the valve body is composed of a left body, a right body and a middle body, the valve seat and the valve body are sealed through static flexible graphite, no spring or lip seal exists behind the valve seat, the valve seat and the sealing ring are tightly attached through the transmission torque of the valve rod directly, the sealing stability is guaranteed, and bidirectional zero leakage is really realized.

5. The whole ball piece is well supported by the upper valve rod and the lower valve rod, and the sealing ring is helped to resist extra force generated by medium force, so that the device is more suitable for high-pressure large-caliber heavy-load working conditions.

6. The sealing ring is fixed on the ball piece through sealed clamping ring, and sealed clamping ring spiro union is on well body, and the sealing ring is changed in the dismouting of being convenient for, the disk seat passes through screw B spiro union is fixed on well body, and the dismouting of being convenient for of sealing ring and disk seat need not special instrument, changes at any time, and reduction in production cost avoids appearing because of the mill's shut down problem that complete machine delivery date arouses.

7. The multi-spherical-surface-line sealed single-valve-seat eccentric ball valve is self-adjusting torque sealing, so that the problem that a spring may vibrate or fail due to the influence of medium temperature and operating conditions is solved, sealing power comes from a gear box, namely, comes from driving actuators such as an air cylinder, a hand wheel and an electric device in the gear box, the hand wheel is rotated to drive the gear box to drive an upper valve rod to rotate, forced extrusion sealing is achieved between a valve seat and a sealing ring, the spring or medium pressure is not relied on, sealing is more reliable, and the sealing grade is higher.

8. The gear box drives the upper valve rod to rotate by driving the key to do circular motion, and the quarter-turn quick opening and closing are realized by driving the lug and the upper valve rod.

Drawings

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

FIG. 2 is a schematic view of the present invention with the gearbox removed;

FIG. 3 is a schematic cross-sectional view of the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 3 according to the present invention;

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

FIG. 6 is a schematic view of a seal ring structure of the present invention.

In the figure: 1. a ball member; 2. a seal ring; 3. sealing the pressure ring; 4. a screw A; 5. a valve seat; 6. a screw B; 7. a middle body; 8. an upper valve stem; 9. a lower valve stem; 10. a gear case; 11. a left body; 12. and (4) the right body.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: the utility model provides a sealed single disk seat eccentric ball valve of many ball facial lines, ball 1 including the sealed design of many ball facial lines, one side of ball 1 has set gradually sealing ring 2 and sealed clamping ring 3, one side of ball 1 is provided with screw A4, screw A4 will seal clamping ring 3 spiro union and fix on ball 1, form a holding tank between ball 1 and the sealed clamping ring 3, sealing ring 2 is fixed in the holding tank through the extrusion of sealed clamping ring 3, the outside of sealing ring 2 is provided with disk seat 5, the surface of sealing ring 2 and the 5 contacts of disk seat is sealed face, the sealed face is the sealed design of many ball facial lines, disk seat 5 only sets up one, the sealing ring 2 and the sealed clamping ring 3 that the cooperation was used all set up one equally.

In this embodiment, the ball member 1 is designed to be eccentric to improve the sealing performance, the center line of the spherical surface of the ball member 1 is eccentric to the center line of the passage, and a perfect circular sealing structure is adopted, and the side of the ball member 1 close to the valve seat 5 is perfect circular, which means that the thickness of the sealing pair part, i.e. the sealing ring 2, is closer to the same, and the sealing performance can be ensured even if the sealing pair part always keeps the same degree of contraction and expansion under the fluctuation of extreme temperature.

Mechanical sealing is carried out through the sealing ring 2, and in the position of closing completely, strict mechanical contact type sealing is realized, also called as extrusion contact type sealing, and the sealing ring 2 and the valve seat 5 have no friction in the operation process, and more than 0 degree valve seat 5 and the sealing ring 2 are completely separated when theoretically opening, and 0-3 degree valve seat 5 and the sealing ring 2 are completely separated in actual measurement, and the torque is smaller.

The eccentric design of the boss on the sealing ring 2 can ensure that the force arms from the special-shaped spherical sealing line of the sealing ring 2 to the center of the sphere are consistent, so that the stress on the same section of the sealing ring 2 is more uniform, and the sealing torque value is reduced.

The sealing surface adopts the design of multiple sealing of special-shaped spherical surface, the sealing surface is sealed and stacked for multiple lines, the pressure is decreased gradually after passing through each sealing line, the sealing effect is more stable, the torque is smaller, the stress of the upper point of the line sealing is more uniform, the service life of the sealing surface is longer, and the valve is more suitable for the design of high-pressure valves and variable-temperature working condition valves.

Only one valve seat 5 is arranged, so that the situation that the double valve seats 5 form a valve cavity, the pressure of an inner cavity is increased due to the temperature change of a medium of the valve cavity is avoided, an open type flow channel is formed, no cavity dead zone is formed, no valve cavity trap is formed, special pressure relief is not needed, and the danger of the problem that the valve is blocked due to the residual medium and solid particles in the valve cavity is fundamentally eliminated.

Specifically, each section of the sealing ring 2 perpendicular to the central line of the channel is a perfect circle, the center of the circle of each section is eccentric to the central line of the channel, and the contact surface of the valve seat 5 and the sealing ring 2 is a perfect circle and eccentric to the central line of the channel.

In the embodiment, each section of the sealing ring 2 perpendicular to the central line of the channel is in a regular circle shape, in the closing process, the sealing ring 2 on the ball piece 1 is in cut-in contact with the surface of the valve seat 5 to wipe the surface layer of the sealing surface and remove attached granular substances, and the sealing ring 2 automatically cleans the surface of the valve seat 5, so that the abrasion caused by welding slag and pipeline foreign matters is eliminated, and the service life of the valve is prolonged.

The contact surface of the valve seat 5 and the sealing ring 2 is also arranged in an eccentric structure for matching with the sealing ring 2 to perform contact sealing.

Specifically, a screw B6 is arranged on the valve seat 5, the valve seat 5 is fixed on the middle body 7 through a screw B6 in a threaded manner, an upper valve rod 8 is arranged at the top of the ball element 1, and a lower valve rod 9 is connected to the bottom of the ball element 1.

In this embodiment, sealing ring 2 is fixed on ball 1 through sealed clamping ring 3, and sealed clamping ring 3 spiro union is on well body 7, and the dismouting of being convenient for is changed sealing ring 2.

The valve seat 5 is fixed on the middle body 7 through a bolt B6 in a threaded manner, the sealing ring 2 and the valve seat 5 can be flexibly disassembled and assembled without special tools and can be replaced at any time, the production cost is reduced, and the problem of factory shutdown caused by the delivery date of the whole machine is solved.

The whole ball element 1 is well supported by the upper valve rod 8 and the lower valve rod 9, so that the valve seat 5 is helped to resist extra force generated by medium force to a great extent, and the ball element is more suitable for high-pressure large-caliber heavy-load working conditions.

Specifically, one end of the upper valve rod 8, which is far away from the ball element 1, is in transmission connection with a gear box 10, one side of the middle body 7 is connected with a left body 11, and the other side of the middle body 7 is connected with a right body 12.

In this embodiment, the valve seat 5 is fixed in a sandwich design of the middle body 7 and the left body 11, and the outlet of the right body 12 is designed with a 30-45-degree flow guide step, so that solid particles remained in the cavity of the valve body can be cleaned by medium pressure when the valve is opened.

Specifically, the ball element 1 is provided with an upper valve stem hole for accommodating the upper valve stem 8, and the upper valve stem hole and the upper valve stem 8 are eccentric to the spherical center line of the ball element 1.

In this embodiment, even if the center line of the channel is eccentric to the center line of rotation of the upper valve rod 8, the upper valve rod 8 drives the ball member 1 to rotate, and drives the sealing ring 2 to extrude the valve seat 5 to seal.

Specifically, the ball element 1 is provided with a through hole for fluid to pass through, the center line of the through hole is eccentric to the spherical center line of the ball element 1, and the spherical center line of the ball element 1 is eccentric to the channel center line.

In the embodiment, the position of the through hole is matched with the eccentric structure design of the valve seat 5, and the spherical center line of the ball piece 1 is eccentric to the center line of the channel, so that the sealing performance is improved.

Specifically, one side of the valve seat 5, which is far away from the ball element 1, is not provided with a spring or a lip seal, and the valve seat 5 is directly tightly attached to the sealing ring 2 through the transmission torque of the upper valve rod 8 and the lower valve rod 9.

In the embodiment, the valve seat 5 is fixed on the middle body 7, the static flexible graphite seal is arranged between the valve seat 5 and the middle body 7, no spring or lip seal is arranged behind the valve seat 5, the valve seat 5 enables the sealing ring 2 and the valve seat 5 to be extruded and sealed directly through the transmission torque of the upper valve rod 8 and the lower valve rod 9, the self-adjusting torque seal is adopted, the problem that the spring is likely to generate vibration or fail due to the influence of medium temperature and operating conditions is solved, the sealing power is from a handle and an executing mechanism on the gear box 10 and does not depend on the spring or medium pressure, the seal is more reliable and stable, the sealing grade is higher, and the bidirectional zero leakage is really realized.

Specifically, a hand wheel is arranged on the gear box 10, and the rotating hand wheel can drive the upper valve rod 8 to rotate through the gear box 10.

In this embodiment, the hand wheel is rotated to drive the gear box 10 to drive the upper valve rod 8 to rotate.

Specifically, the top of the upper valve rod 8 is provided with a key groove and a key, and the gear box 10 drives the key to move circularly, so that the upper valve rod 8 is driven to rotate.

In this embodiment, the gear box 10 drives the key to move circumferentially to drive the upper valve rod 8 to rotate, and the quarter-turn quick opening and closing is realized by driving the key and the upper valve rod 8.

Specifically, the left body 11 and the right body 12 are both screwed and fixed on the middle body 7 through a plurality of screws and nuts.

In this embodiment, the valve seat 5 is fixed to be sandwiched between the middle body 7 and the left body 11, and the valve seat 5 is mainly fixed between the middle body 7 and the left body 11 by the tightening torque of the screw B6 on the middle body 7, thereby preventing the valve seat 5 from loosening after being opened and closed for many times.

The working principle and the using process of the utility model are as follows: the hand wheel is rotated to drive the gear box 10, the gear box 10 drives the key to move circularly so as to drive the upper valve rod 8 to rotate and realize the quick opening and closing of quarter rotation, the upper valve rod 8 drives the eccentrically arranged ball part 1 to rotate, the whole ball part 1 is supported by the upper valve rod 8 and the lower valve rod 9, the valve seat 5 directly leads the sealing ring 2 and the valve seat 5 to be extruded and sealed by the transmission torque of the upper valve rod 8 and the lower valve rod 9, the self-adjusting torque sealing is adopted, the vibration or failure problem which can be generated by the spring due to the influence of medium temperature and operation conditions is eliminated, the sealing power is from a handle and an executing mechanism on the gear box 10, the mechanical sealing is carried out by the sealing ring 2 without depending on the spring or medium pressure, the strict mechanical contact type sealing, also called extrusion contact type sealing is realized at the full-close position, and the sealing surface adopts the design of special-shaped spherical multiple sealing, the sealed face is sealed the stack for the multiple line, and pressure is progressively reduced after through every sealed line step by step, and sealed effect is more stable, and the in-process of closing, sealing ring 2 on the ball spare 1 cut into 5 surfaces of contact disk seat, cleans sealed face top layer and gets rid of adnexed particulate matter, and 2 self-cleaning disk seat 5 surfaces of sealing ring have eliminated the wearing and tearing that welding slag, pipeline foreign matter arouse, extension valve life.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an eccentric ball valve of sealed single disk seat of many ball lines which characterized in that: comprises a ball piece (1) with a multi-spherical-surface-line sealing design, a sealing ring (2) and a sealing press ring (3) are sequentially arranged on one side of the ball piece (1), one side of the ball piece (1) is provided with a screw A (4), the sealing press ring (3) is fixed on the ball piece (1) by the screw A (4) in a threaded manner, an accommodating groove is formed between the ball piece (1) and the sealing press ring (3), the sealing ring (2) is fixed in the accommodating groove in an extruding way through the sealing press ring (3), a valve seat (5) is arranged on the outer side of the sealing ring (2), the surface of the sealing ring (2) contacting with the valve seat (5) is a sealing surface, the sealing surface is designed in a multi-spherical-surface sealing mode, the valve seat (5) is only provided with one, and the sealing ring (2) and the sealing pressing ring (3) which are used in a matched mode are also provided with one.

2. The multi-spherical-surface-line sealed single-seat eccentric ball valve according to claim 1, wherein: each section of the sealing ring (2) perpendicular to the central line of the channel is a perfect circle, the center of the circle of each section is eccentric to the central line of the channel, and the contact surface of the valve seat (5) and the sealing ring (2) is a perfect circle and eccentric to the central line of the channel.

3. The multi-spherical-surface-line sealed single-seat eccentric ball valve according to claim 2, wherein: the ball valve is characterized in that a screw B (6) is arranged on the valve seat (5), the valve seat (5) is fixed on the middle body (7) through the screw B (6) in a threaded mode, an upper valve rod (8) is arranged at the top of the ball piece (1), and a lower valve rod (9) is connected to the bottom of the ball piece (1).

4. The multi-spherical-surface-line sealed single-seat eccentric ball valve according to claim 3, wherein: one end, far away from the ball piece (1), of the upper valve rod (8) is in transmission connection with a gear box (10), one side of the middle body (7) is connected with a left body (11), and the other side of the middle body (7) is connected with a right body (12).

5. The multi-spherical-surface-line sealed single-seat eccentric ball valve according to claim 4, wherein: an upper valve rod hole for accommodating the upper valve rod (8) is formed in the ball piece (1), and the upper valve rod hole and the upper valve rod (8) are eccentric to the spherical center line of the ball piece (1).

6. The multi-spherical-surface-line sealed single-seat eccentric ball valve according to claim 5, wherein: the ball piece (1) is provided with a through hole for fluid to pass through, the center line of the through hole is eccentric to the spherical center line of the ball piece (1), and the spherical center line of the ball piece (1) is eccentric to the channel center line.

7. The multi-spherical-surface-line sealed single-seat eccentric ball valve according to claim 3, wherein: one side of the valve seat (5) far away from the ball piece (1) is not provided with a spring or a lip seal, and the valve seat (5) is directly connected with the sealing ring (2) through the upper valve rod (8) and the lower valve rod (9) in a transmission torque mode.

8. The multi-spherical-surface-line sealed single-seat eccentric ball valve according to claim 4, wherein: a hand wheel is arranged on the gear box (10), and the hand wheel can be rotated to drive the upper valve rod (8) to rotate through the gear box (10).

9. The multi-spherical-surface-line sealed single-seat eccentric ball valve according to claim 5, wherein: the top of going up valve rod (8) is provided with keyway and key, gear box (10) are through driving key circular motion to valve rod (8) rotation in the drive.

10. The multi-spherical-surface-line sealed single-seat eccentric ball valve according to claim 4, wherein: the left body (11) and the right body (12) are both fixed on the middle body (7) through a plurality of screw rods and nuts in a threaded manner.