WO2019047377A1

WO2019047377A1 - Pneumatic high-temperature high-pressure water-repellent ball valve

Info

Publication number: WO2019047377A1
Application number: PCT/CN2017/111999
Authority: WO
Inventors: 胡勇; 朱结成; 杨胜; 丁焕铸; 卞明
Original assignee: 江苏科维仪表控制工程有限公司
Priority date: 2017-09-08
Filing date: 2017-11-21
Publication date: 2019-03-14

Abstract

Provided is a pneumatic high-temperature high-pressure water-repellent ball valve, comprising a frame (21) and a valve body (7); a shaft hole (19) is arranged on said frame (21); the upper part of a valve rod (15) passes through the shaft hole (19); the bottom of the valve rod (15) is connected to a spherical body (5); the two sides of the interior of the valve body (7) are each provided with a medium inlet and a medium outlet; an inlet valve-seat (4) is arranged in the valve body (7) on one side of the medium inlet; an outlet valve-seat (6) is arranged in the valve body (7) on one side of the medium inlet; a groove body is arranged on the outer surface of the position, on the valve body (7), connected to the frame (21); the groove body is an arcuate groove (17); the upper part of the frame (21) is connected to a pneumatic head (24); the pneumatic head (24) is connected to the valve rod (15) by means of a shaft coupling (25). The groove body is arranged on the outer surface of the position, on the valve body (7), connected to the frame (21); during welding, the welding deformation is effectively reduced, and, in particular, the valve is protected during post-weld heat treatment; the shaft coupling (25) is provided with a position-limiting groove (23) fitting a position-limiting apparatus (22) on the frame (21); it is thus possible to control the maximum amplitude of the valve opening and closing, ensuring that full and complete opening and closing is achieved in a precise manner.

Description

Pneumatic high temperature and high pressure hydrophobic ball valve

Technical field

The invention relates to the field of valves, in particular to a pneumatic high temperature and high pressure hydrophobic ball valve.

Background technique

The pneumatic ball valve is a valve device driven by air pressure. Its working principle is to use the air pressure to drive the ball to rotate. The ball has a circular through hole. When the ball rotates 90 degrees, the through hole axis is at an angle of 90 degrees to the valve axis. Block the flow path to shut off the fluid. However, the pneumatic ball valve on the market currently has the following disadvantages: the existing pneumatic ball valve is rotated by the human eye when the pneumatically driven valve stem drives the ball to rotate, but it is inevitable that the error is caused by human observation. For example, when it is closed, it should be rotated 90° to close it in place. This time it is completely sealed. However, when it is observed by the human eye, it may be closed at 89°. It is also the same, so it will not be completely The seal affects normal use.

Summary of the invention

The object of the present invention is to overcome the above problems and to provide a pneumatic high temperature and high pressure hydrophobic ball valve.

In order to achieve the above object, the method adopted by the present invention is: a pneumatic high-temperature high-pressure hydrophobic ball valve comprising a bracket and a valve body, wherein the bracket is provided with a shaft hole, and an upper portion of the valve stem passes through the shaft a hole, a bottom of the valve stem is connected to the ball body, and a medium inlet and a medium outlet are respectively arranged on two sides of the valve body, and an inlet valve seat is arranged in the valve body on the medium inlet side, and an outlet is arranged in the valve body on the medium outlet side. a valve seat, the inlet valve seat and the outlet valve seat respectively are attached to the two end faces of the ball to form a metal sealing pair, and the valve body is An outer surface at a position where the brackets are connected is provided with a groove body, the groove body is an arc groove, a pneumatic head is connected to an upper portion of the bracket, and the pneumatic head passes through the coupling and the The valve stems are connected.

As an improvement of the present invention, the bracket is further provided with a limiting device, and the coupling is provided with a limiting slot matched with the limiting device, the limiting position The device cooperates with the limiting slot to limit the rotation angle of the coupling; the limiting slot is a 1/4 circular slot, and the limiting device is disposed in the 1/4 circular slot.

As an improvement of the present invention, the coupling includes a valve stem connecting portion, an actuator connecting portion and an intermediate connecting block, and the intermediate connecting block is disposed between the valve stem connecting portion and the pneumatic head, and the limiting slot It is placed on the lower end face of the intermediate connection block.

As an improvement of the present invention, the outlet valve seat is provided with a step having a smaller diameter near the end of the medium outlet, and the valve body is provided with a stepped hole corresponding to the step of the outlet valve seat, at the outlet The end face b on the step of the valve seat and the end face of the valve body step hole are adjusted to a precision of 1.6 μm by the inclined rail, and the polishing finish is 0.2 μm by the brush, and the end face and the valve seat step on the valve body step The end faces of the holes are slightly grounded to each other to achieve full sealing, and the sealing is achieved; the interference between the cylindrical surface a on the step of the outlet valve seat and the stepped hole of the valve body is greater than the pressure of the valve.

As an improvement of the present invention, an elastic member, an adjusting sleeve and a retaining ring are further disposed on the medium inlet side of the valve body, and the adjusting sleeve is disposed between the elastic member and the retaining ring. One end of the elastic member is pressed against the inlet valve seat, and the other end is pressed against the adjusting sleeve. One end of the adjusting sleeve is pressed against the elastic member, and the other end is pressed against the retaining ring, and the retaining ring is a winding retaining ring. The winding retaining ring is disposed in the retaining ring mounting groove and automatically compensates Radial clearance.

As an improvement of the present invention, the bracket and the valve body are a shaft hole, and an anti-flying ring is sleeved on the valve stem, and the anti-flying ring is disposed on the boss and the bracket. between.

As an improvement of the present invention, a filler box is further disposed on the valve stem, and the stuffing box is sleeved outside the valve stem and fixedly mounted with the valve body, and the stuffing box includes a packing pad, a filler, and a filler. The gland and the seasoning plate are arranged between the valve stem and the valve body, the packing gland is sleeved on the valve stem and the packing pad and the packing are pressed, and the upper end of the packing gland is passed through the packing plate and the bolt nut Fixed, a disc spring is also arranged between the packing gland and the packing platen.

As an improvement of the present invention, the anti-flying ring and the bracket are fixed by a pin, and the pin is a rolled heavy elastic cylindrical pin.

As a modification of the present invention, a groove is provided on the packing platen, and the disc spring is disposed in the groove, and the convex surface of the disc spring is in contact with the upper end surface of the groove, and the disc spring is The inner concave surface is in contact with the connecting flange on the packing gland.

Beneficial effects:

1. The outer surface beveled groove shape at the position where the valve body is connected with the bracket can effectively reduce the welding deformation when welding, especially when the post-weld heat treatment; 2, through the coupling The limit groove and the limit device on the bracket are arranged to control the maximum range of opening and closing, and the full opening and the complete closing can be accurately ensured; 3. The winding type retaining ring is arranged at the inlet end of the medium instead of the original one. Double-open or four-opening ring, 360-degree support surface will not produce lug interference in the device, no burrs, spiral-wound multi-turn winding has high-strength load capacity, and automatically compensates for radial clearance after screwing into the workpiece; 4. The whole flip-type anti-flying ring is effectively embedded in the integral bracket, which has high-strength anti-flying function, and can also prevent the valve stem from deflecting the displacement. The special spraying treatment is performed on the workpiece, the valve stem and the whole flip The anti-flying ring, the overall flip-chip anti-flying ring and the bracket friction coefficient are reduced, so that the valve torque is reduced; 5. The end face b on the outlet valve seat step and the valve body stepped hole end face, adopting the inclined rail numerical control processing After the precision reaches 1.6μm, the polishing finish of the wool brush is 0.2μm, and the end faces of the valve body step and the stepped hole of the valve seat are slightly matched to each other to achieve full sealing, and the sealing is achieved; An interference fit is adopted between the cylindrical surface a and the stepped hole of the valve body, and the interference amount is greater than the pressure test pressure of the valve, so that the sealing between the outlet valve seat and the valve body is stronger, and the sealing is more firm and not easy to leak; 6. Rolled heavy-duty elastic cylindrical pin will automatically expand when loaded, without any gap; 7. Adding a disc spring increases the flexibility of the entire fastening system, reducing creep due to filler or different thermal expansion. Causing bolt Load on tight relaxation, improves the sealing performance of the gland cover, prolonging its life.

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention;

2 is a schematic structural view of a coupling and a limiting device when the ball valve of the present invention is opened;

3 is a schematic structural view of a coupling and a limiting device when the ball valve of the present invention is closed;

Figure 4 is an enlarged view of a portion A of the present invention;

Figure 5 is an enlarged view of a portion B of the present invention;

Figure 6 is a schematic view showing the installation structure of the retaining ring of the present invention;

Figure 7 is a schematic view showing the structure of the retaining ring of the present invention installed in the mounting groove;

Figure 8 is a perspective view of the retaining ring of the present invention.

Detailed ways

The present invention will be further clarified by the following embodiments in conjunction with the accompanying drawings and specific embodiments, which are to be construed as being limited to the scope of the invention.

A pneumatic high-temperature high-pressure hydrophobic ball valve as shown in FIGS. 1 to 5, comprising a bracket 21 and a valve body 7, on which a shaft hole 19 is provided, and the valve stem 15 passes through the The shaft hole 19 is connected to the positioning block 26 by a screw 13. The bottom of the valve rod 15 is connected to the ball body 5, and the inner side of the valve body 7 is respectively provided with a medium inlet and a medium outlet, and an inlet valve seat 4 is arranged in the valve body on the medium inlet side, on the medium outlet side. An outlet valve seat 6 is disposed in the valve body, and the inlet valve seat 4 and the outlet valve seat 6 are respectively engaged with the two end faces of the ball body 5 to form a metal seal pair. The bracket 21 and the valve body 7 are integrally cast, and the bracket 21 and the valve body 7 are integrally swaged, and the strength is sufficient to withstand any internal and external load forces, and the service life can be consistent with the body.

A pneumatic head 24 is attached to the upper portion of the bracket 21, and the pneumatic head 24 is fixed to the bracket 21 via a connecting bracket 27. The pneumatic head 24 is connected to the valve stem 15 via a coupling 25, and specifically to the positioning block 26 connected to the valve stem 15 via a connecting groove on the coupling 25. The bracket 21 is further provided with a limiting device 22, and the limiting device adopts a positioning screw. a limiting slot 23 is provided on the coupling 25 for engaging with the limiting device 22, and the limiting device 22 cooperates with the limiting slot 23 to limit the rotation angle of the coupling 25; The limiting slot 23 is a 1/4 circular slot, and the limiting device 22 is disposed on the 1/4 circular slot. The coupling 25 includes a valve stem connecting portion, an actuator connecting portion and an intermediate connecting block, and the intermediate connecting block It is disposed between the valve stem connecting portion and the pneumatic head, and the limiting groove 23 is disposed on the lower end surface of the intermediate connecting block. By providing the limiting slot 23 on the coupling 25 and the limiting device 22 on the bracket 21, it is possible to control the maximum amplitude of opening and closing (rotation 90° opening, and rotating 90° closing) to ensure accurate full opening and Completely closed.

An outer surface of the valve body 7 at a position connected to the bracket 21 is provided with a groove body, and the groove body is an arc-shaped groove 17 at a position on the valve body connected to the bracket. The surface of the beveled groove has an external shape, which can effectively reduce the welding deformation during welding, especially when the post-weld heat treatment.

The outlet valve seat 6 is provided with a step having a smaller diameter near the end of the medium outlet, and the valve body 7 is provided with a stepped hole matching the step of the outlet valve seat 6, on the step of the outlet valve seat. The end face b of the end face b is matched with the stepped hole of the valve body, and the precision of the NC machining of the inclined rail reaches 1.6 μm, and then the polishing degree of the brush is 0.2 μm, and the end surface of the valve body step is matched with the stepped hole of the valve seat. The end faces are slightly matched to each other to achieve a full plane to achieve sealing; an interference fit is used between the cylindrical surface a on the step of the outlet valve seat and the stepped hole of the valve body, and the interference is greater than the pressure test pressure of the valve.

An elastic member 3, an adjusting sleeve 2 and a retaining ring 1 are further disposed on the medium inlet side of the valve body 7, and the elastic member 3 is preferably a disc spring, and the adjusting sleeve 2 is disposed on the elastic member 3 and Between the retaining rings 1, one end of the elastic member 3 is pressed against the inlet valve seat 4, and the other end is pressed against the adjusting sleeve 2. One end of the adjusting sleeve 2 is pressed against the elastic member 3, and the other end is opposite to the retaining ring 1. Pressing, the retaining ring 1 is a wound retaining ring, and the winding retaining ring is disposed in the retaining ring mounting groove and automatically compensates for the radial gap. By providing a wound retaining ring at the inlet end of the medium instead of the original double or four open ring, the 360 degree support surface will not be in the device. There is a lug interference inside, no burrs, and the spiral-wound multi-turn winding has a high-strength load capacity, and automatically compensates for the radial clearance after being screwed into the workpiece.

An anti-flying ring 12 is disposed on the valve stem 15 , and the anti-flying ring 12 is disposed between the boss 20 and the bracket 21 . The anti-flying ring 12 and the bracket 21 are fixed by a pin, and the pin is a rolled heavy elastic cylindrical pin 14. The heavy-duty elastic cylindrical pin 14 automatically expands when loaded, without any gap, so that the fly-proof ring 12 and the bracket 21 are fixed firmly. The anti-flying ring 12 is an integral structure, and the whole flip-chip anti-flying ring 12 is effectively embedded in the integral bracket, has a high-strength anti-flying function, and can also prevent the valve stem from being displaced.

The spraying process is performed at the place where the valve stem 15 and the anti-flying ring 12 and the anti-flying ring 12 are in contact with the bracket 21. In the special spraying treatment of the workpiece, the friction coefficient of the valve stem and the overall inverted anti-flying ring, the overall inverted anti-flying ring and the bracket are reduced, so that the valve torque is reduced.

A filler box is further disposed on the valve rod 15, and the stuffing box is sleeved outside the valve rod 15 and fixedly mounted with the valve body 7. The stuffing box includes a packing pad 8, a packing 16, and a packing gland 9 And the adjusting platen 10, the packing pad 8 and the packing 16 are disposed between the valve stem 15 and the valve body 7, the packing gland 9 is sleeved on the valve stem 15 and the packing pad 8 and the packing 16 are pressed, and the packing gland is pressed The upper end of the 9 is fixed by the packing platen 10 and the bolt nut 11, and a disc spring 18 is further disposed between the packing gland 9 and the packing platen 10.

A groove is disposed on the packing platen 10, and the disc spring 18 is disposed in the groove, and the convex surface of the disc spring 18 is in contact with the upper end surface of the groove, and the concave surface of the disc spring 18 and the filler The connecting flanges on the gland 9 are in contact. In order to increase the elasticity of the disc spring 18, The two disc springs 18 are used in parallel to contact the inner concave surfaces of the two disc springs 18, and the two outer convex surfaces are respectively in contact with the upper end surface of the recess and the connecting flange on the packing gland 9.

In the embodiment, the filler 16 anti-extrusion graphite is prepared by adding the Inconel nickel alloy wire packing ring, which can meet the requirements of API 622 micro-leakage, anti-wear, and can withstand temperature and high temperature up to 650 degrees.

The technical means disclosed in the solution of the present invention is not limited to the technical means disclosed in the above embodiments, and includes a technical solution composed of any combination of the above technical features.

Claims

A pneumatic high-temperature and high-pressure hydrophobic ball valve comprises a bracket (21) and a valve body (7), and a shaft hole (19) is arranged on the bracket (21), and an upper portion of the valve stem (15) passes through the The shaft hole (19), the bottom of the valve stem (15) is connected with the ball (5), and the inner side of the valve body (7) is respectively provided with a medium inlet and a medium outlet, and the valve body on the medium inlet side An inlet valve seat (4) is provided on the side of the medium outlet with an outlet valve seat (6), and the inlet valve seat (4) and the outlet valve seat (6) are respectively opposite to the two end faces of the ball (5) Forming a metal sealing pair, characterized in that: an outer surface of the valve body (7) at a position connected to the bracket (21) is provided with a groove body, and the groove body is an arc groove (17) A pneumatic head (24) is connected to the upper portion of the bracket (21), and the pneumatic head is connected to the valve stem (15) via a coupling (25).
A pneumatic high-temperature high-pressure water-repellent ball valve according to claim 1, characterized in that: said bracket (21) is further provided with a limiting device (22), which is arranged on said coupling (25) a limiting slot (23) cooperated with the limiting device (22), and the limiting device (22) cooperates with the limiting slot (23) to limit the rotation angle of the coupling (25); The limiting slot (23) is a 1/4 circular slot, and the limiting device (22) is disposed on the 1/4 circular slot.
A pneumatic high-temperature high-pressure water-repellent ball valve according to claim 2, wherein said coupling (25) comprises a valve stem connecting portion, an actuator connecting portion and an intermediate connecting block, said intermediate connecting block being arranged Between the valve stem connecting portion and the pneumatic head, a limiting groove (23) is provided on the lower end surface of the intermediate connecting block.
A pneumatic high temperature and high pressure hydrophobic ball valve according to claim 1 or 2, characterized in that The outlet valve seat (6) is provided with a step having a smaller diameter near the end of the medium outlet, and the valve body (7) is provided with a stepped hole matching the step of the outlet valve seat (6). The end face b on the step of the outlet valve seat and the end surface of the valve body step hole are matched with the precision of the inclined rail numerical control processing to 1.6 μm, and then the polishing degree of the brush is 0.2 μm, and the end surface of the valve body step is The end faces of the stepped holes of the valve seat are slightly matched to each other to achieve a full plane to achieve sealing; the interference between the cylindrical surface a on the step of the outlet valve seat and the stepped hole of the valve body is used, and the interference is greater than that of the valve. Pressure.
The pneumatic high-temperature high-pressure water-repellent ball valve according to claim 1 or 2, characterized in that: at the medium inlet side of the valve body (7), an elastic member (3) and an adjustment sleeve (2) are further disposed. And a retaining ring (1), the adjusting sleeve (2) is disposed between the elastic member (3) and the retaining ring (1), and one end of the elastic member (3) is pressed against the inlet valve seat (4), The other end is pressed against the adjusting sleeve (2), one end of the adjusting sleeve (2) is pressed against the elastic member (3), and the other end is pressed against the retaining ring (1), and the retaining ring (1) is a The winding type retaining ring is disposed in the retaining ring mounting groove and automatically compensates for the radial gap.
A pneumatic high-temperature and high-pressure water-repellent ball valve according to claim 1 or 2, wherein a shaft hole (19) is formed between the bracket (21) and the valve body (7), and the valve is The rod (15) is sleeved with an anti-flying ring (12), and the anti-flying ring (12) is disposed between the boss (20) and the bracket (21).
The pneumatic high-temperature high-pressure hydrophobic ball valve according to claim 1 or 2, characterized in that: the valve stem (15) is further provided with a stuffing box, and the stuffing box is sleeved on the outside of the valve stem (15) And fixedly mounted with the valve body (7), the stuffing box comprises a packing mat (8), a packing (16), a packing gland (9) and a seasoning pressing plate (10), the packing mat (8), The packing (16) is disposed between the valve stem (15) and the valve body (7), and the packing gland (9) is sleeved on the valve stem (15) and presses the packing pad (8) and the packing (16), and the packing The upper end of the gland (9) is fixed by a packing platen (10) and a bolt nut (11), and a disc spring (18) is further disposed between the packing gland (9) and the packing platen (10).
A pneumatic high-temperature and high-pressure water-repellent ball valve according to claim 6, wherein said anti-flying ring (12) and said bracket (21) are fixed by pins, and said pin is rolled heavy. Elastic cylindrical pin (14).
A pneumatic high-temperature high-pressure water-repellent ball valve according to claim 7, wherein a groove is disposed on said packing platen (10), and said disc spring (18) is disposed in said groove The convex surface of the disc spring (18) is in contact with the upper end surface of the recess, and the concave surface of the disc spring (18) is in contact with the connecting flange on the packing gland (9).