CN215928398U

CN215928398U - Pneumatic angle seat valve

Info

Publication number: CN215928398U
Application number: CN202122506987.2U
Authority: CN
Inventors: 项朴
Original assignee: Zhejiang Aodun Technology Co ltd
Current assignee: Zhejiang Aodun Technology Co ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-03-01
Anticipated expiration: 2031-10-18

Abstract

The utility model discloses a pneumatic angle seat valve, which comprises a valve body, a valve seat arranged in the valve body, a valve cover arranged in the valve body, a valve rod arranged on the valve cover, a valve core arranged on the valve rod and matched with the valve seat to form a seal, and a pneumatic actuating mechanism arranged on the valve cover. The utility model has the following advantages and effects: the utility model can be applied to severe working conditions and has better application range and practicability.

Description

Pneumatic angle seat valve

Technical Field

The utility model relates to a valve, in particular to a pneumatic angle seat valve.

Background

The angle seat valve is a pilot angle seat valve operated by a single-action pneumatic actuator with spring safety protection. The angle seat valve is widely applied to short-time frequent starting, keeps the flow velocity, can save space, has the characteristics of sensitive response, accurate action and the like, is matched with the electromagnetic valve for use, and can accurately control the flow of gas and liquid by pneumatic control. Can realize the requirements of accurate temperature control, liquid dripping and the like.

The existing pneumatic angle seat valve comprises a valve body, a valve cover, a valve rod, a valve core, a valve seat and a pneumatic actuating mechanism, wherein a packing assembly is arranged between the valve rod and the valve cover. Because the existing angle seat valve has unreasonable design, when the angle seat valve is applied to the working conditions of high pressure and corrosive media, the sealing surface of the valve seat is easily washed by the high-speed flowing media, so that the sealing performance of the angle seat valve is influenced; and corrosive medium contacts with the packing component under the action of pressure, and can corrode the packing component, so that leakage is caused, the conventional angle seat valve cannot be applied in severe working conditions, and the application range and the practicability of the angle seat valve are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pneumatic angle seat valve which can be applied to severe working conditions and has a better application range and practicability.

The technical purpose of the utility model is realized by the following technical scheme: the utility model provides a pneumatic angle seat valve, includes the valve body, set up the disk seat in the valve body, set up in the valve gap of valve body, install in the valve rod of valve gap, set up in valve rod and cooperation disk seat constitution sealed case and set up in the pneumatic actuator of valve gap, be equipped with packing component between valve gap and the valve rod, the inner chamber of valve body is divided into inflow chamber and outflow chamber to the disk seat, the export orientation in inflow chamber is the same with the sealed face orientation of disk seat, the inflow chamber wall is close to in the position of disk seat and is equipped with the drainage isolating ring, the valve gap is equipped with corrosion-resistant first sealing washer towards the one side of valve body inner chamber, be equipped with on the first sealing washer and extend into between valve gap and the valve rod and be located the extension ring of packing component below, be formed with an extrusion chamber in the first sealing washer, extend the intra-annular expansion chamber that is formed with communicating with the extrusion chamber.

Through adopting above-mentioned technical scheme, in fluid medium gets into the valve body from the entry of influent stream chamber, when fluid medium flowed through the drainage spacer ring and flowed out from the export of influent stream chamber, avoided the contact of fluid medium and valve seat sealing face under the separation of drainage spacer ring, and through setting the orientation of valve seat sealing face to the mode the same with influent stream chamber export orientation, can further reduce the contact of fluid and sealing face when flowing through the valve seat, better avoid the fluid medium of high-speed flow to the washing that the valve seat sealing face caused. When the angle seat valve is opened, the pressure in the valve cavity is increased to extrude the extrusion cavity, so that the gas in the extrusion cavity moves towards the expansion cavity to expand the expansion cavity, and the expansion cavity which expands drives the extension ring to simultaneously support the valve cover and the valve rod, thereby realizing better sealing between the valve cover and the valve rod and avoiding the contact of corrosive media and a packing component, and further achieving better sealing effect. The pneumatic angle seat valve can be applied to severe working conditions and has a better application range and practicability.

Further setting the following steps: the inner ring of the drainage isolating ring extends towards the valve core and is gradually arranged in a necking mode inwards to form a guide inclined plane, one end, back to the valve core, of the guide inclined plane is connected with the wall of the inflow cavity, and the drainage isolating ring is made of alloy steel.

Through adopting above-mentioned technical scheme, the setting of guide inclined plane plays the drainage effect to the fluid medium that flows through, reduces the fluid medium and to the washing away that the drainage isolating ring caused, guarantees that the unobstructed nature that the fluid medium flows has also reduced the formation of vibration and noise.

Further setting the following steps: and a sealing ring extending towards the valve core is formed on the drainage isolating ring, and when the valve core is matched with the valve seat to form sealing, the valve core is matched with the sealing ring to form sealing.

By adopting the technical scheme, the sealing ring is matched with the valve core to form sealing, and the valve seat is matched with the valve core to form sealing, so that double-channel sealing is realized, and the sealing performance of the angle seat valve is improved.

Further setting the following steps: an end face, facing the valve core, of the first sealing ring forms an inward-concave arc-shaped face, and the arc-shaped face surrounds the circle center of the valve rod to form a circular ring shape.

Through adopting above-mentioned technical scheme, the setting up of arcwall face increases lifting surface to make the concentrated effect that acts on the arcwall face of ability more, thereby better extrudeing the extrusion chamber.

Further setting the following steps: the packing assembly comprises an inner spring, an upper sealing packing group and a lower sealing packing group which are identical in structure, the inner spring is arranged between the upper sealing packing group and the lower sealing packing group, the upper sealing packing group and the lower sealing packing group are symmetrically distributed, and the upper sealing packing group is composed of a plurality of V-shaped packing which are mutually overlapped.

Through adopting above-mentioned technical scheme, the setting of inner spring is to last sealing packing group and the synchronous driving force that applys of lower sealing packing group, at the packing of cooperation V type for the packing can be better when receiving the driving force of inner spring, moves to both sides, thereby drives packing inseparabler and tightly supports in valve rod and valve gap, makes valve rod and valve gap reach better sealed effect between the two.

Further setting the following steps: the pneumatic actuating mechanism comprises a shell arranged on the valve cover, a piston arranged in the shell in a sliding mode and a main spring driving the piston to move, the piston is connected with the valve rod, a linking nut which is connected with the valve cover in a threaded mode and used for locking the shell is arranged in the shell, and the linking nut extends between the valve cover and the valve rod and is abutted to the packing assembly.

Through adopting above-mentioned technical scheme, interlinkage nut and valve gap threaded connection have realized that the shell lies in the valve gap fixed simultaneously, and the interlinkage nut towards the motion of packing subassembly also extrudees the packing subassembly, makes the packing subassembly can be inseparabler support tightly in valve gap and valve rod to reach better sealed effect.

Further setting the following steps: including being located shell below and with valve gap threaded connection's fine setting lock nut, fine setting lock nut cooperation is linked the nut and is used for being fixed in the valve gap with the shell, be equipped with the second sealing washer between shell and the valve gap.

Through adopting above-mentioned technical scheme, fine setting lock nut cooperation is linked the nut and is realized that the shell lies in the locking of valve gap and fix, and the height that pneumatic actuator was adjusted to the nut is linked in the cooperation of accessible fine setting lock nut cooperation to this cooperation position between the case and the disk seat is adjusted, guarantees the inseparable sealing between them, also can change and link the nut to the packing component's packing force, thereby adjusts the sealing force to packing component, guarantees the stable sealing of packing component.

Further setting the following steps: and a sealing gasket matched with the valve seat to form sealing is arranged at the bottom of the valve core.

Through adopting above-mentioned technical scheme, sealed setting up of filling up realizes the flexible seal between valve seat and the case the two, and life is longer, sealed effect is better.

In conclusion, the utility model has the following beneficial effects: the utility model can be applied to severe working conditions and has better application range and practicability.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

fig. 4 is a partial structural diagram of the embodiment.

In the figure: 1. a valve body; 2. a valve seat; 3. a valve cover; 4. a valve stem; 5. a valve core; 6. a pneumatic actuator; 61. a housing; 62. a piston; 63. a main spring; 7. a packing assembly; 71. an upper seal packing set; 72. a lower seal packing set; 73. an inner spring; 8. a flow inlet cavity; 9. an outflow cavity; 10. a drainage isolation ring; 11. a first seal ring; 12. an extension ring; 13. an extrusion chamber; 14. an expansion chamber; 15. a guide ramp; 16. a seal ring; 17. an arc-shaped surface; 18. a link nut; 19. fine adjustment of a locking nut; 20. a second seal ring; 21. and a gasket.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 4, a pneumatic angle seat valve includes a valve body 1, a valve seat 2 integrally disposed in the valve body 1, a valve cover 3 fixedly disposed on the valve body 1, a valve rod 4 mounted on the valve cover 3, a valve core 5 fixedly disposed on the valve rod 4 and matched with the valve seat 2 to form a seal, and a pneumatic actuator 6 disposed on the valve cover 3 and used for driving the valve rod 4 to move. A packing component 7 is arranged between the valve cover 3 and the valve rod 4, the valve seat 2 divides an inner cavity of the valve body 1 into an inflow cavity 8 and an outflow cavity 9, an outlet of the inflow cavity 8 is arranged upwards, and the orientation of a sealing surface of the valve seat 2 is the same as that of an outlet of the inflow cavity 8. The position that 8 walls of inflow chamber are close to disk seat 2 is fixed and is provided with drainage isolating ring 10, and the inner circle of drainage isolating ring 10 extends towards case 5 and inwards is the throat setting gradually and forms a guide inclined plane 15, and the one end and the 8 wall connections of inflow chamber of guide inclined plane 15 dorsad case 5, and the material of drainage isolating ring 10 is alloy steel.

One side of the bottom of the valve core 5 facing the valve seat 2 is fixedly provided with a sealing gasket 21 which is matched with the valve seat 2 to form sealing, a sealing ring 16 which extends towards the sealing gasket 21 is formed on the drainage isolating ring 10, and when the valve core 5 is matched with the valve seat 2 to form sealing, the valve core 5 is matched with the sealing ring 16 to form sealing. The one side that valve gap 3 faced the inner chamber of valve body 1 is fixed and is provided with corrosion-resistant first sealing washer 11, is equipped with on the first sealing washer 11 to extend into between valve gap 3 and the valve rod 4 and be located the extension ring 12 of packing subassembly 7 below, is formed with an extrusion chamber 13 in the first sealing washer 11, is formed with in the extension ring 12 with the communicating annular expansion chamber 14 in extrusion chamber 13, the material of first sealing washer 11 is non-perfluororubber. An end face of the first sealing ring 11 facing the valve core 5 forms an inwardly concave arc-shaped face 17, and the arc-shaped face 17 surrounds the center of the valve rod 4 to form a circular ring shape.

The packing assembly 7 includes an inner spring 73, and an upper packing set 71 and a lower packing set 72, and the inner spring 73 is disposed between the upper packing set 71 and the lower packing set 72. The upper sealing packing group 71 and the lower sealing packing group 72 are symmetrically distributed, the upper sealing packing group 71 is composed of a plurality of V-shaped packing which are mutually overlapped, and the structures of the upper sealing packing group 71 and the lower sealing packing group 72 are the same, so the detailed structure of the lower sealing packing group 72 is not described in detail.

The pneumatic actuator 6 comprises a housing 61 mounted on the valve cover 3, a piston 62 slidably disposed in the housing 61, and a main spring 63 for driving the piston 62 to move, wherein the piston 62 is fixedly connected with the valve rod 4. A link nut 18 which is in threaded connection with the valve cap 3 and is used for locking the housing 61 is arranged in the housing 61, and the link nut 18 extends between the valve cap 3 and the valve rod 4 and is abutted against the upper sealing packing group 71. A fine adjustment locking nut 19 in threaded connection with the valve cover 3 is arranged below the shell 61, the fine adjustment locking nut 19 is matched with the link nut 18 to be used for locking and fixing the shell 61 on the valve cover 3, and a second sealing ring 20 is arranged between the shell 61 and the valve cover 3.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a pneumatic angle seat valve, includes valve body (1), sets up disk seat (2) in valve body (1), sets up in valve gap (3) of valve body (1), installs in valve rod (4) of valve gap (3), sets up in valve rod (4) and cooperation disk seat (2) constitute sealed case (5) and set up in pneumatic actuating mechanism (6) of valve gap (3), be equipped with filler subassembly (7) between valve gap (3) and valve rod (4), disk seat (2) fall into inflow chamber (8) and outflow chamber (9) with the inner chamber of valve body (1), its characterized in that: the outlet of inflow chamber (8) is towards the same with the sealed face orientation of disk seat (2), inflow chamber (8) wall is close to the position in disk seat (2) and is equipped with drainage isolating ring (10), valve gap (3) are equipped with corrosion-resistant first sealing washer (11) towards the one side of valve body (1) inner chamber, be equipped with on first sealing washer (11) and extend into between valve gap (3) and valve rod (4) and be located extension ring (12) of packing subassembly (7) below, be formed with one extrusion chamber (13) in first sealing washer (11), be formed with in extension ring (12) and extrude chamber (13) communicating annular expansion chamber (14).

2. Pneumatic angle seat valve according to claim 1, characterized in that: the inner ring of the drainage isolating ring (10) extends towards the valve core (5) and is gradually arranged in a necking manner inwards to form a guide inclined plane (15), one end, back to the valve core (5), of the guide inclined plane (15) is connected with the wall of the flow inlet cavity (8), and the drainage isolating ring (10) is made of alloy steel.

3. The pneumatic angle seat valve of claim 2, wherein: and a sealing ring (16) extending towards the valve core (5) is formed on the drainage isolating ring (10), and when the valve core (5) is matched with the valve seat (2) to form sealing, the valve core (5) is matched with the sealing ring (16) to form sealing.

4. Pneumatic angle seat valve according to claim 1, characterized in that: an inwards-concave arc-shaped surface (17) is formed at one end face, facing the valve core (5), of the first sealing ring (11), and the arc-shaped surface (17) surrounds the circle center of the valve rod (4) to form a circular ring shape.

5. Pneumatic angle seat valve according to claim 1, characterized in that: the packing assembly (7) comprises an inner spring (73) and an upper sealing packing group (71) and a lower sealing packing group (72) which are identical in structure, the inner spring (73) is arranged between the upper sealing packing group (71) and the lower sealing packing group (72), the upper sealing packing group (71) and the lower sealing packing group (72) are symmetrically distributed, and the upper sealing packing group (71) is composed of a plurality of V-shaped packing which are mutually overlapped.

6. Pneumatic angle seat valve according to claim 1, characterized in that: the pneumatic actuating mechanism (6) comprises a shell (61) arranged on the valve cover (3), a piston (62) arranged in the shell (61) in a sliding mode and a main spring (63) driving the piston (62) to move, the piston (62) is connected with the valve rod (4), a linking nut (18) which is connected with the valve cover (3) in a threaded mode and used for locking the shell (61) is arranged in the shell (61), and the linking nut (18) extends into a position between the valve cover (3) and the valve rod (4) and is abutted to the packing assembly (7).

7. Pneumatic angle seat valve according to claim 6, characterized in that: including being located shell (61) below and with valve gap (3) threaded connection's fine setting lock nut (19), fine setting lock nut (19) cooperation link nut (18) are used for being fixed in valve gap (3) with shell (61), be equipped with second sealing washer (20) between shell (61) and valve gap (3).

8. Pneumatic angle seat valve according to claim 1, characterized in that: and a sealing gasket (21) which is matched with the valve seat (2) to form a seal is arranged at the bottom of the valve core (5).