CN215172553U - Manual pneumatic emergency cut-off valve - Google Patents

Abstract

The utility model relates to a manual pneumatic emergency cut-off valve, which comprises a valve body, a valve clack and a valve seat, wherein the valve body is fixedly arranged at the bottom of an oil storage tank by an upper end flange, the valve seat is arranged on the upper end surface of the valve body and is matched with the lower end surface of the valve clack to form a sealing pair, and the valve clack is controlled by a valve clack control device to open and close; the method is characterized in that: the valve clack control device is provided with a pneumatic control device and a manual control device; the normal opening and closing adopts pneumatic control, and the emergency adopts manual opening and closing, and has the advantages of convenient operation, good use safety and the like. The oil outlet valve is suitable for tank bottoms of oil tank trucks, oil storage tanks and the like.

Description

Manual pneumatic emergency cut-off valve

Technical Field

The utility model belongs to the valve field especially relates to a cut-off subsea valve promptly. The utility model is suitable for a tank bottoms fuel outlet valve such as tank wagon, oil storage tank.

Background

The sea bottom valve is generally used for a tank bottom oil outlet control valve of an oil tank truck, an oil storage tank and the like. The subsea valve is divided into a manual subsea valve and a pneumatic subsea valve according to the control mode. The manual subsea valve adopts a handle to rotate to a cam to realize the opening and closing control of the valve clack, and has the defect of troublesome operation; the pneumatic subsea valve realizes the opening and closing control of the valve clack by using an air source, and has the defect that the subsea valve cannot be operated when an air source system fails.

Disclosure of Invention

The utility model discloses shortcoming to prior art exists provides one kind and has manual, gas accuse function, opens and close convenient operation, the reliable manual pneumatic emergency cut-off valve of taking of control.

The technical scheme of the utility model comprises a valve body, a valve clack and a valve seat, wherein the valve body is fixedly arranged at the bottom of an oil storage tank by an upper end flange, the valve seat is arranged on the upper end surface of the valve body and is matched with the lower end surface of the valve clack to form a sealing pair, and the valve clack is controlled by a valve clack control device to open and close; the method is characterized in that: the valve clack control device is provided with a pneumatic control device and a manual control device; the pneumatic control device comprises a piston cylinder body, a piston and a piston rod, wherein the piston cylinder body is provided with a first piston cavity and a second piston cavity, the lower end surface of the piston cylinder body is fixedly and hermetically arranged on the inner side of a flange on the upper end surface of a valve body, the side wall of the lower end of the piston cylinder body is provided with a radial window, the outer cylindrical surface of a valve clack is in dynamic sealing fit with the first piston cavity, the piston is arranged in the second piston cavity, the outer cylindrical surface of the piston rod is in dynamic sealing fit with the inner wall of the second piston cavity, the upper end of the piston rod is fixedly connected with the piston, the lower end of the piston rod is fixedly connected with the valve clack, the outer cylindrical surface of the piston rod is in dynamic sealing fit with a shaft hole on the bottom surface of the second piston cavity, a rod cavity of the second piston cavity is communicated with an air source switch through air holes in the piston cylinder body and the valve body, a spring is arranged between the back surface of the valve clack and the upper wall of the first piston cavity, and a balance hole is arranged on the inner side plane of a sealing surface of the valve clack; the manual control device comprises a rotating shaft, a cam and a handle, one end of the rotating shaft is connected with the handle, the other end of the rotating shaft penetrates into the inner cavity of the valve body, the outer circular surface of the rotating shaft is in dynamic sealing fit with the valve body, and the cam is fixedly arranged on the rotating shaft under the valve clack.

In the above technical scheme, the valve seat adopts a rubber sealing ring, the upper end of an inner hole of the rubber sealing ring is provided with a conical sealing surface matched with the valve clack, an annular concave groove is arranged on the upper plane of the outer side of the sealing surface of the rubber sealing ring, an annular convex ring is arranged on the lower plane, the lower end face of the piston cylinder body is provided with a convex ring matched with the annular concave groove, and the upper end face of the valve body is provided with a groove matched with the annular convex ring.

In the above technical solution, the inner annular wall of the annular groove is an inclined surface, and the inner annular wall of the convex ring at the lower end of the piston cylinder body has an inclined surface with an equal inclination to the inner annular wall of the annular groove, and the two form a wedge-shaped matching structure.

In the technical scheme, the Y-shaped rubber sealing ring is embedded on the outer circular surface of the piston.

In the technical scheme, the lower end of the piston rod is a spherical surface which penetrates through the central hole of the valve clack and extends out of the lower end face of the valve clack.

Compared with the prior art, the utility model beneficial effect be: the valve clack is provided with a pneumatic control device and a manual control device, the valve clack is controlled pneumatically in normal opening and closing, and is opened and closed manually in emergency, so that the valve clack has the advantages of convenience in operation, good use safety and the like.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: the valve comprises a valve body 1, a piston cylinder body 2, a rubber sealing ring 3, a spring 4, an air hole 5, a piston 6, a rubber sealing ring 7Y, a piston rod 8, a valve clack 9, a balance hole 10, a valve seat 11, a rotating shaft 12 and a cam 13.

Detailed Description

The manual pneumatic emergency cut-off valve shown in fig. 1 comprises a valve body 1, a valve clack 9 and a valve seat 11, wherein the valve body 1 is fixedly and hermetically arranged at the bottom of an oil storage tank by an upper end flange and is used as an oil discharge valve, and the valve seat 11 is arranged on the upper end surface of the valve body 1 and is matched with the lower end surface of the valve clack 9 to form a sealing pair; the method is characterized in that: the valve clack 9 is provided with a pneumatic control device and a manual control device, the pneumatic control device controls the opening and closing state of the valve clack 9 through air pressure of an air source, the operation is convenient, and the manual control device opens the valve clack 9 through a handle under emergency conditions of power failure, air source failure and the like, so that safe and reliable opening and closing operation is realized; the pneumatic control device comprises a piston cylinder body 2, a piston 6 and a piston rod 8, wherein the piston cylinder body 2 is provided with a first piston cavity and a second piston cavity, the lower end surface of the piston cylinder body is fixedly and hermetically arranged on the inner side of a flange on the upper end surface of a valve body 1, the side wall of the lower end of the piston cylinder body is provided with a radial window which communicates the first piston cavity with an inner cavity of an oil storage tank, the outer cylindrical surface of a valve clack 9 is in dynamic sealing fit with the first piston cavity, a rubber sealing ring 3 is embedded between the first piston cavity and the outer cylindrical surface of the valve clack 9 to improve the dynamic sealing performance, the piston 6 is arranged in the second piston cavity, the outer cylindrical surface of the piston 6 is in dynamic sealing fit with the inner wall of the second piston cavity, the upper end of the piston rod 8 is fixedly connected with the piston 6, the lower end of the piston rod is fixedly connected with the valve clack 9, the outer cylindrical surface of the piston rod 8 is in dynamic sealing fit with a shaft hole on the bottom surface of the second piston cavity to form a linkage device with the valve clack 9 and the piston 6, a rod cavity, and a rod cavity communicated with an air source switch through an air hole 5 on the piston cylinder body 2 and the valve body 1, introducing air pressure into a rod cavity of a piston 6, pushing the piston 6 and a valve clack 9 to move upwards, pneumatically controlling the valve clack 9 to open, installing a spring 4 between the back surface of the valve clack 9 and the upper cavity wall of a first piston cavity, pressing and sealing the valve clack 9 and a valve seat 11 by the spring 4, improving sealing force for the valve clack 9, and arranging a balance hole 10 on the inner side plane of a sealing surface of the valve clack 9 to ensure that the valve clack 9 can move freely; the manual control device comprises a rotating shaft 12, a cam 13 and a handle, one end of the rotating shaft 12 is connected with the handle, the other end of the rotating shaft 12 penetrates into an inner cavity of the valve body 1, the outer circular surface of the rotating shaft 12 is matched with the valve body 1 in a dynamic sealing mode, the cam 13 is fixedly installed on the rotating shaft 12 right below the valve clack 9, when an air source fault occurs, the rotating shaft 12 is rotated through the handle to drive the cam 13 to rotate, the valve clack 9 is pushed to be opened or closed, and the valve clack 9 is manually controlled to be opened or closed. The other end of the rotating shaft 12 is positioned in a positioning hole of the valve body 1, and the pneumatic control device can be replaced by a hydraulic control device, and only the air pressure needs to be replaced by hydraulic pressure.

Disk seat 11 adopts rubber seal ring, and this rubber seal ring hole upper end has the sealed face of circular cone of mutually supporting with valve clack 9, and the plane is equipped with annular concave cao on the sealed face outside of rubber seal ring, and the plane is equipped with annular bulge loop down, 2 terminal surfaces of piston cylinder body be equipped with the bulge loop of mutually supporting of annular concave cao, this bulge loop embedding annular concave cao in, improve 2 planar location on to rubber seal ring of piston cylinder body, 1 up end of valve body be equipped with the recess of mutually supporting of annular bulge loop, planar annular bulge loop embedding valve body 1's recess under the rubber seal ring improves 1 planar location under to rubber seal ring of valve body, prevents that rubber seal ring radial displacement, improves sealed cooperation precision.

The inner ring wall of the annular groove is an inclined plane, the inner circular wall of the convex ring at the lower end of the piston cylinder body 2 is provided with an inclined plane with the same inclination as the inner circular wall of the annular groove, and the inclined plane and the inner circular wall form a wedge-shaped matching structure, so that the conical sealing surface of the rubber sealing ring is radially compressed, and the sealing matching performance of the sealing ring and the valve clack 9 is improved.

The Y-shaped rubber sealing ring 7 is embedded in the outer circular surface of the piston 6, the opening of the Y-shaped rubber sealing ring 7 faces the rod cavity of the second piston cavity, the Y-shaped rubber sealing ring 7 is expanded when air pressure enters the rod cavity, and the sealing performance between the piston 6 and the second piston cavity is improved.

The lower end of the piston rod 8 is a spherical surface which passes through the central hole of the valve clack 9 and extends out to the lower end surface of the valve clack 9, and the cam 13 is eccentrically arranged with the rotating shaft 12 by adopting a cylinder, namely, the center line of the cylinder and the center line of the rotating shaft 12 have an eccentric distance. When the handle drives the cam 13 to rotate through the rotating shaft 12, the outer cylindrical surface of the cylinder of the cam 13 is in contact with the spherical surface at the lower end of the piston rod 8, the piston rod 8 is pushed to ascend, and the valve clack 9 is opened; when the external force is removed from the handle, the spring 4 pushes the valve clack 9 and the piston rod 8 to move downwards, the spherical surface at the lower end of the piston rod 8 pushes the cam 13 to automatically rotate to the closing position of the valve clack 9, and the valve clack 9 is kept in a normally closed state.

Claims (6)

1. A manual pneumatic emergency cut-off valve comprises a valve body (1), a valve clack (9) and a valve seat (11), wherein the valve body (1) is fixedly and hermetically arranged at the bottom of an oil storage tank through an upper end flange, the valve seat (11) is arranged on the upper end surface of the valve body (1) and is matched with the lower end surface of the valve clack (9) to form a sealing pair, and the valve clack (9) is controlled to be opened and closed by a valve clack control device; the method is characterized in that: the valve clack control device is provided with a pneumatic control device and a manual control device; the pneumatic control device comprises a piston cylinder body (2), a piston (6) and a piston rod (8), wherein the piston cylinder body (2) is provided with a first piston cavity and a second piston cavity, the lower end face of the piston cylinder body (2) is fixedly and hermetically arranged on the inner side of a flange on the upper end face of the valve body (1), the side wall of the lower end of the piston cylinder body is provided with a radial window, the outer cylindrical face of a valve clack (9) is in dynamic sealing fit with the first piston cavity, the piston (6) is arranged in the second piston cavity, the outer cylindrical face of the piston cylinder body is in dynamic sealing fit with the inner wall of the second piston cavity, the upper end of the piston rod (8) is fixedly connected with the piston (6), the lower end of the piston rod is fixedly connected with the valve clack (9), the outer cylindrical face of the piston rod (8) is in dynamic sealing fit with a shaft hole on the bottom face of the second piston cavity, a rod cavity of the second piston cavity is communicated with an air source switch through an air hole (5) on the piston cylinder body (2) and the valve body (1), a spring (4) is arranged between the back face of the valve clack (9) and the upper wall of the first piston cavity, a balance hole (10) is arranged on the inner plane of the sealing surface of the valve clack (9); the manual control device comprises a rotating shaft (12), a cam (13) and a handle, one end of the rotating shaft (12) is connected with the handle, the other end of the rotating shaft penetrates into an inner cavity of the valve body (1), the outer circular surface of the rotating shaft (12) is matched with the valve body (1) in a dynamic sealing mode, and the cam (13) is fixedly installed on the rotating shaft (12) under the valve clack (9).

2. The manual pneumatic slam shut valve of claim 1 further comprising: disk seat (11) adopt rubber seal ring, and this rubber seal ring hole upper end has the sealed face of the circular cone of mutually supporting with valve clack (9), and the plane is equipped with annular concave groove on the sealed face outside of rubber seal ring, and the lower plane is equipped with annular bulge loop, piston cylinder body (2) lower terminal surface be equipped with the bulge loop of mutually supporting of annular concave groove, valve body (1) up end be equipped with the recess of mutually supporting of annular bulge loop.

3. The manual pneumatic emergency cut-off valve as claimed in claim 2, wherein: the inner annular wall of the annular groove is an inclined surface, the inner circular wall of the convex ring at the lower end of the piston cylinder body (2) is provided with an inclined surface with the same inclination as the inner annular wall of the annular groove, and the inclined surface and the inner circular wall form a wedge-shaped matching structure.

4. A hand operated pneumatic slam shut valve as claimed in claim 1, 2 or 3 wherein: and a Y-shaped rubber sealing ring (7) is embedded on the outer circular surface of the piston (6), and the opening of the Y-shaped rubber sealing ring (7) faces the rod cavity of the second piston cavity.

5. A hand operated pneumatic slam shut valve as claimed in claim 1, 2 or 3 wherein: the lower end of the piston rod (8) is a spherical surface which passes through a central hole of the valve clack (9) and extends out to the lower end surface of the valve clack (9), and the cam (13) is eccentrically arranged with the rotating shaft (12) by adopting a cylinder.

6. The manual pneumatic slam shut valve of claim 4 further characterized by: the lower end of the piston rod (8) is a spherical surface which passes through a central hole of the valve clack (9) and extends out to the lower end surface of the valve clack (9), and the cam (13) is eccentrically arranged with the rotating shaft (12) by adopting a cylinder.

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