Bidirectional sealing V-shaped ball valve

Abstract

A valve seat used for being attached to the spherical surface end of a V-shaped ball body is arranged at the position, located at the inlet end, of a valve body, one end of the valve seat is a valve seat sealing face attached to the spherical surface end of the V-shaped ball body, and a notch is formed in the other end of the valve seat and forms an annular cavity with the side wall of the inlet end; one end of the sealing compression ring and the back face of one end of the valve seat form an exhaust groove, a first O-shaped ring is arranged between one side of the sealing compression ring and the notch wall of the other end of the valve seat, a second O-shaped ring is arranged between the other side of the sealing compression ring and the side wall of the inlet end, and a spring groove is formed in the other end of the sealing compression ring. And a spring in the spring groove is propped against the seat cover. The invention has the advantages of full-pressure-difference two-way sealing, good sealing performance and long service life.

Description

Technical Field

[0001] The invention patent relates to the field of ball valves, specifically to a bidirectional sealing V-type ball valve. Background Art

[0002] The V-shaped ball valve is a valve whose opening and closing part (V-shaped ball) is driven by the valve stem and rotates around the axis of the ball valve. The V-shaped regulating ball valve adds the function of adjusting the flow channel opening on the basis of the ball valve to achieve flow change, making the function of the V-shaped ball valve diversified. The one-way seal of the conventional V-shaped ball valve. Summary of the invention

[0003] The purpose of the present invention is to solve the existing technical problems and to propose a bidirectional sealing V-shaped ball valve.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a two-way sealed V-type ball valve, comprising a valve body, a V-type ball, a valve seat, a first O-ring, a second O-ring, a sealing pressure ring, a seat cover, a valve stem assembly and a spring. A V-type ball is arranged in the valve body, and the V-type ball is controlled to work by the valve stem assembly. A valve seat for fitting the spherical end of the V-type ball is arranged at the inlet end of the valve body. One end of the valve seat is a valve seat sealing surface fitting the spherical end of the V-type ball. A notch is arranged at the other end of the valve seat to form an annular chamber with the side wall of the inlet end. The sealing pressure ring is arranged in the annular chamber. An exhaust groove is formed at one end of the sealing pressure ring and the back of one end of the valve seat. A first O-ring is arranged between one side of the sealing pressure ring and the notch wall at the other end of the valve seat. A second O-ring is arranged between the other side of the sealing pressure ring and the side wall of the inlet end. A spring groove is arranged at the other end of the sealing pressure ring. The seat cover is arranged outside the inlet end of the valve body to cover the other end of the sealing pressure ring, and the spring in the spring groove rests on the seat cover.

[0005] Furthermore, the seat cover is fixedly connected to the outer side of the inlet end of the valve body by bolts.

[0006] Furthermore, a first step surface is provided in the valve body, a second step surface corresponding to the first step surface is provided on the front side of one end of the valve seat, and the second step surface on the front side of one end of the valve seat is attached to the first step surface.

[0007] Furthermore, one side of one end of the valve seat is in contact with the side wall of the inlet end.

[0008] Furthermore, the lower end of the V-shaped sphere is connected to the lower valve stem, and the upper end of the V-shaped sphere is connected to the upper valve stem.

[0009] Furthermore, the upper valve stem passes through the upper valve stem cavity of the valve body, and the upper valve stem cavity gradually shrinks in a step-like manner from top to bottom, including a third step surface and a fourth step surface. The fourth step surface outside the upper valve stem is covered with a spring energy storage sealing ring, and the spring energy storage sealing ring is sleeved on the outside of the upper valve stem; above the spring energy storage sealing ring, a packing is filled on the outside of the upper valve stem; above the packing, a packing press sleeve is sleeved between the third step surface and the outside of the upper valve stem, a butterfly spring is arranged on the outer part of the upper valve stem above the packing press sleeve, and a pressure plate is arranged on the outside of the upper valve stem at the upper end outlet of the upper valve stem cavity.

[0010] Furthermore, the sealing pressure ring is in the shape of a ring, with a first O-ring groove on the inner wall and a second O-ring groove on the outer wall, a uniform spring groove on the end face of the other end of the sealing pressure ring, and an exhaust groove with a ring shape in the middle and a cross shape on the outer side on the end face of one end of the sealing pressure ring.

[0011] The beneficial effects of the present invention are as follows: this patent is a bidirectional seal with full pressure difference; the spring energy storage seal ring cooperates with the butterfly spring on the packing sleeve to form a dynamic seal compensation system to meet the low leakage sealing requirements; the connection between the V-type ball valve and the upper valve stem is a toothed spline connection, which improves the accuracy of the ball turning with the handle when switching, reduces the dead zone, and improves the connection strength; the valve body adopts a high-platform integrated design, which not only meets the handle installation requirements, but also can directly install pneumatic and electric actuators without the need to install an additional actuator mounting bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A cross-sectional view.

[0013] Figure 2 This is an enlarged view of part A.

[0014] Figure 3 Schematic diagram of toothed spline connection.

[0015] Figure 4 This is a top view.

[0016] Figure 5 For sealing ring Figure 1 .

[0017] Figure 6 For sealing ring Figure 2 .

[0018] 1 is a valve body; 2 is a V-shaped ball; 3 is a valve seat; 4 is a first O-ring; 5 is a second O-ring; 6 is a sealing pressure ring; 7 is a seat cover; 8 is a spring; 9 is a valve seat sealing surface; 10 is an exhaust groove; 11 is a spring groove; 12 is a bolt; 13 is a first step surface; 14 is a second step surface; 15 is an upper valve stem cavity; 16 is an upper valve stem; 17 is a third step surface; 18 is a fourth step surface; 19 is a spring energy storage sealing ring; 20 is a packing; 21 is a packing gland; 22 is a butterfly spring; 23 is a pressure plate; 24 is a toothed spline; 25 is a handle; 26 is an inlet end; 27 is an outlet end; 28 is a lower valve stem; 29 is a shaft sleeve; 30 is a rear pressure cover; 32 is a first O-ring groove; 33 is a second O-ring groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Embodiment 1 Combination Figure 1-6 , a two-way sealed V-type ball valve, comprising a valve body 1, a V-type ball 2, a valve seat 3, a first O-ring 4, a second O-ring 5, a sealing pressure ring 6, a seat cover 7, a valve stem assembly and a spring 8. A V-type ball 2 is arranged in the valve body 1, and the V-type ball 2 is controlled to work by the valve stem assembly. A valve seat 3 for fitting the spherical end of the V-type ball is provided at the inlet end of the valve body. One end of the valve seat is a valve seat sealing surface 9 fitting the spherical end of the V-type ball. A notch is provided at the other end of the valve seat to form an annular chamber with the side wall of the inlet end. The sealing pressure ring 6 is arranged in the annular chamber. An exhaust groove 10 is formed between one end of the sealing pressure ring and the back of one end of the valve seat. A first O-ring 4 is arranged between one side of the sealing pressure ring and the notch wall at the other end of the valve seat. A second O-ring 5 is arranged between the other side of the sealing pressure ring and the side wall of the inlet end. A spring groove 11 is arranged at the other end of the sealing pressure ring. The seat cover is arranged on the outside of the inlet end of the valve body to cover the other end of the sealing pressure ring, and the spring 8 in the spring groove rests on the seat cover.

[0021] Bidirectional sealing V-type ball valve, bidirectional sealing with full pressure difference, the spring is a cylindrical spring.

[0022] The bidirectional sealed V-type ball valve has changed from the old linear spring preload seal to a cylindrical spring, which can better adjust the preload force range.

[0023] The two-way sealing V-type ball valve has a sealing ring in the shape of a ring, a first O-ring groove 32 is provided on the inner wall, a second O-ring groove 33 is provided on the outer wall, a uniform spring groove is provided on the end face of the other end of the sealing ring, and an exhaust groove with a ring shape in the middle and a cross shape on the outer side is provided on the end face of one end of the sealing ring.

[0024] Working principle: When the medium enters from the inlet end 26 of the valve body, the medium pressure acts on the second O-ring and the valve seat sealing surface to form an area difference, pushing the sealing ring to do piston movement, and then presses against the valve seat to fit the spherical surface of the V-shaped ball to form a seal; When the medium enters from the outlet end 27 and passes through the channel formed by the exhaust groove, the medium pressure acts on the area difference formed by the first O-ring and the valve seat sealing surface, pushing the valve seat to move like a piston and then fit the spherical surface of the V-shaped sphere to form a seal.

[0025] The bidirectional sealed V-type ball valve adopts a high-platform integrated design for the valve body, which can not only meet the requirements of handle installation, but also directly install pneumatic and electric actuators without the need to install an additional actuator mounting bracket.

[0026] A two-way sealing V-type ball valve, wherein the seat cover is fixedly connected to the outer side of the inlet end of the valve body by bolts 12.

[0027] Two-way sealed V-type ball valve with good sealing and long service life.

[0028] Bidirectional sealing V-type ball valve, the valve stem assembly includes an upper valve stem and a lower valve stem.

[0029] The bidirectional sealing V-type ball valve has a first step surface 13 in the valve body, a second step surface 14 corresponding to the first step surface is provided on the front side of one end of the valve seat, and the second step surface on the front side of one end of the valve seat is attached to the first step surface. There is a medium flow gap between the contact surface of the valve body 1 and the valve seat to the exhaust groove 10.

[0030] Two-way sealing V-type ball valve, one side of the valve seat fits against the side wall of the inlet end.

[0031] Two-way sealing V-type ball valve, the lower end of the V-type ball is connected to the lower valve stem, and the upper end of the V-type ball is connected to the upper valve stem.

[0032] A two-way sealed V-shaped ball valve, wherein the lower end of the V-shaped ball is connected to the upper end of the lower valve stem, the lower end of the lower valve stem passes through the valve body and is sealed by the rear gland 30, and a shaft sleeve 29 is sleeved on the outer side of the lower valve stem.

[0033] The upper valve stem 16 of the bidirectional sealing V-type ball valve passes through the upper valve stem cavity 15 of the valve body. The upper valve stem cavity is stepped from top to bottom and gradually shrinks, including the third step surface 17 and the fourth step surface 18. The fourth step surface outside the upper valve stem is covered with a spring energy storage seal ring 19, and the spring energy storage seal ring is sleeved outside the upper valve stem; a packing 20 is filled outside the upper valve stem above the spring energy storage seal ring; a packing gland 21 is sleeved between the third step surface and the outer part of the upper valve stem above the packing, and a butterfly spring 22 is arranged outside the upper valve stem above the packing gland, and a pressure plate 23 is arranged outside the upper valve stem at the upper end outlet of the upper valve stem cavity. The spring energy storage seal ring and the butterfly spring on the packing gland form a dynamic sealing compensation system to meet the sealing requirements of low leakage.

[0034] The bidirectional sealing V-type ball valve has a toothed spline 24 connected to the upper valve stem.

[0035] A bidirectional sealing V-type ball valve, wherein a handle 25 is provided on the upper end of the upper valve stem.

[0036] The connection between the ball and the valve stem is changed from the traditional keyway connection to a toothed spline connection, which improves the accuracy of the ball turning with the handle when it is switched, reduces the dead zone, and improves the connection strength.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A bidirectional sealed V-shaped ball valve, comprising a valve body (1), a V-shaped ball (2), a valve seat (3), a first O-ring (4), a second O-ring (5), a sealing ring (6), a seat cover (7), a valve stem assembly and a spring (8), wherein the valve body (1) is provided with a V-shaped ball (2), and the V-shaped ball (2) is controlled to operate by the valve stem assembly, and is characterized in that: The valve body (1) is provided with a valve seat (3) for fitting the spherical end of a V-shaped sphere at the inlet end (26), one end of the valve seat (3) is a valve seat sealing surface (9) fitting the spherical end of the V-shaped sphere, the other end of the valve seat is provided with a notch to form an annular chamber with the side wall of the inlet end, a sealing pressure ring (6) is arranged in the annular chamber, one end of the sealing pressure ring and the back of one end of the valve seat form an exhaust groove (10), a first O-ring (4) is provided between one side of the sealing pressure ring and the notch wall at the other end of the valve seat, a second O-ring (5) is provided between the other side of the sealing pressure ring and the side wall of the inlet end, a plurality of spring grooves (11) are provided at the other end of the sealing pressure ring, a seat cover (7) is arranged outside the inlet end of the valve body to cover the other end of the sealing pressure ring, and a spring (8) in the spring groove abuts against the seat cover.

2. The bidirectional sealing V-type ball valve according to claim 1, characterized in that: The seat cover is fixedly connected to the outer side of the inlet end of the valve body by bolts (12).

3. The bidirectional sealing V-type ball valve according to claim 2 is characterized in that: A first step surface (13) is provided in the valve body (1), a second step surface (14) corresponding to the first step surface is provided on the front face of one end of the valve seat, and the second step surface on the front face of one end of the valve seat is abutted against the first step surface.

4. The bidirectional sealing V-type ball valve according to claim 3 is characterized in that: One side of one end of the valve seat (3) is in contact with the side wall of the inlet end.

5. The bidirectional sealing V-type ball valve according to claim 1, characterized in that: The lower end of the V-shaped sphere (2) is connected to the lower valve stem (28), and the upper end of the V-shaped sphere (2) is connected to the upper valve stem (16).

6. The bidirectional sealing V-type ball valve according to claim 5, characterized in that: The upper valve stem (16) passes through the upper valve stem cavity (15) of the valve body. The upper valve stem cavity is stepped from top to bottom and includes a third step surface (17) and a fourth step surface (18). The fourth step surface outside the upper valve stem is covered with a spring energy storage sealing ring (19), and the spring energy storage sealing ring is sleeved outside the upper valve stem; a packing (20) is filled outside the upper valve stem above the spring energy storage sealing ring; a packing pressing sleeve (21) is sleeved between the third step surface and the outside of the upper valve stem above the packing; a butterfly spring (22) is arranged outside the upper valve stem above the packing pressing sleeve, and a pressure plate (23) is arranged outside the upper valve stem at the outlet of the upper end of the upper valve stem cavity.

7. The bidirectional sealing V-type ball valve according to claim 5, characterized in that: The sealing pressure ring (6) is annular, with a first O-ring groove provided on the inner wall and a second O-ring groove provided on the outer wall. A uniform spring groove is provided on the end surface of the other end of the sealing pressure ring. An exhaust groove with a ring shape in the middle and a cross shape on the outer side is provided on the end surface of one end of the sealing pressure ring.

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