CN222085295U - An integrated emergency shut-off valve - Google Patents

Abstract

The utility model particularly relates to an integrated emergency cut-off valve, wherein an inner cavity of a valve body sequentially comprises a mounting cavity part and a cutting cavity part which are communicated from top to bottom, a valve clack is arranged on a first limiting ring surface in an abutting mode, a spring limiting groove with the upper end communicated with the mounting cavity part is formed in the center of the valve clack, one end of a spring is connected to a valve cover, the other end of the spring is positioned in the spring limiting groove, the end of the spring is connected to the bottom of a spring mounting groove, the valve clack and the spring are arranged in the valve body from top to bottom, and then the valve cover is arranged, so that the upper part of the emergency cut-off valve can be assembled.

Description

Integrated emergency cut-off valve

Technical Field

The utility model relates to the technical field of shut-off valves, in particular to an integrated emergency shut-off valve.

Background

The oil storage tank is generally communicated with an oil delivery pipe through a bottom valve, and the oil storage tank is filled with or discharged from the oil delivery pipe. The bottom valve of the oil tank truck is also called an emergency cut-off valve, and is arranged at the bottom of the oil tank truck, the valve clack is sealed in the tank, the valve body is provided with a cut-off groove, after the valve body is subjected to the action of violent external force, the valve body is broken along the cut-off groove, and the separation of a pipeline at the bottom of the oil tank and the tank body is realized under the condition that the sealing of the tank body is not influenced, so that the leakage of oil in the tank is effectively prevented, and the safety of transportation is ensured.

The utility model patent with the application number 201220651958.3 discloses an emergency cut-off bottom valve of an oil tank truck, which comprises a valve body, a valve clack, a valve seat, a valve rod, a valve cover, a spring and a pneumatic control device, wherein the valve body is fixedly and hermetically arranged at the bottom of the tank body of the oil tank truck through a flange, the valve seat is arranged in the valve body, a sealing surface of the valve seat is communicated with the inner cavity of the tank body, a sealing surface matched with the valve seat is arranged on the lower end surface of the valve clack, the lower end of the valve rod is fixedly connected with the center of the valve clack, the upper end of the valve rod is arranged in a guide hole in the center of the valve cover, the valve rod and the valve clack are in a split structure, so that the production and installation procedures are increased, the sealing procedures between the valve rod and the valve cover are increased, and the sealing safety cannot be ensured.

Disclosure of utility model

The utility model aims to overcome the defects and the shortcomings of the prior art and provides an integrated emergency shut-off valve.

The utility model adopts the following technical scheme that the integrated emergency cut-off valve comprises a valve body, a valve clack, a spring, a valve cover and a pneumatic mechanism, wherein the valve body is fixedly and hermetically arranged at the bottom of an oil storage tank by an upper flange, the valve cover is fixedly arranged at a passage opening at the upper end of the valve body and forms a medium cavity with an inner cavity of the valve body, the valve clack is dynamically and hermetically arranged in the medium cavity, the pneumatic mechanism is used for driving the valve cover to move towards the upper end of the valve body,

The valve body inner cavity sequentially comprises a mounting cavity part and a cutting cavity part which are communicated from top to bottom, the valve body is provided with a radial window which is communicated with the mounting cavity part and the outside of the valve body, the caliber of the top end of the cutting cavity part is smaller than that of the bottom end of the mounting cavity part, a first limiting ring surface is formed between the mounting cavity part and the cutting cavity part, the valve clack is arranged on the first limiting ring surface in an abutting manner,

The center of the valve clack is provided with a spring limit groove, the upper end of the spring limit groove is communicated with the installation cavity part, one end of the spring is connected with the valve cover, the other end of the spring is positioned in the spring limit groove, the end is connected with the bottom of the spring installation groove,

The valve clack moves up and down under the action of the spring and the pneumatic mechanism and has a closed state of propping against the first limiting ring surface to form a seal with the valve clack and cutting off the communication between the radial window and the cutting cavity part, and an open state of leaving the first limiting ring surface and enabling the radial window to be communicated with the cutting cavity part.

Preferably, the inner cavity of the valve clack is provided with a first cavity part, a second cavity part and a third cavity part which are concentrically arranged and sequentially communicated from top to bottom, the first cavity part and the second cavity part form a spring installation cavity,

The caliber of the third cavity part is smaller than that of the second cavity part, a second limiting ring surface is formed at the joint of the third cavity part and the second cavity part, the lower end part of the spring is positioned in the second cavity part, the bottom end of the spring is propped against the second limiting ring surface,

The bottom of the valve clack is provided with a balance hole communicated with the third cavity part and the cutting cavity part.

Preferably, the caliber of the second cavity part is smaller than that of the first cavity part, a first transitional annular surface is formed at the joint of the first cavity part and the second cavity part, and the first transitional annular surface is in transition with the smooth convex curved surfaces of the side walls of the first cavity part and the side walls of the second cavity part.

Preferably, the valve clack comprises a first ring part, a second ring part, a third ring part and a fourth ring part which are sequentially connected from top to bottom, the outer peripheral calibers of the first ring part and the third ring part are matched with the caliber of the medium cavity and form sealing fit with the cavity wall of the medium cavity,

The outer diameter of the second ring part is smaller than that of the first ring part and the third ring part, the end surface of the outer circumferential surface of the second ring part, which is opposite to the first ring part and the third ring part, forms a first ring groove positioned in the mounting cavity part, the radial window is communicated with the first ring groove and the outside of the valve body,

The peripheral diameter of the fourth ring part is smaller than that of the third ring part, and the lower end of the fourth ring part extends into the cutting cavity part to form a fit with the pneumatic mechanism.

Preferably, the annular surface of the lower end of the third ring part, which is close to the cutting cavity part, is downwards extended to form a limiting step which is in abutting fit with the first limiting annular surface, and the inner periphery of the limiting ring part, the lower end surface of the third ring part and the outer periphery of the fourth ring part form a balance annular groove.

Preferably, a sealing ring groove is arranged between the bottom of the third ring part and the upper part of the limiting ring part, and a sealing gasket with the outer end propped against the first limiting ring surface is embedded in the sealing ring groove.

Preferably, the first caulking groove is formed in the outer periphery of the middle of the first ring part in a surrounding mode, a sealing ring is embedded in the first caulking groove, a second caulking groove is formed in the position, above and below one caulking groove, of the outer Zhou Yudi of the first ring part, and a guide ring is arranged in the second caulking groove.

Preferably, the guide convex part is concentrically arranged in the upper end of the valve cover, and the upper end part of the spring is sleeved outside the guide convex part.

Preferably, the lower end of the valve body is provided with a piston mounting cavity, the pneumatic mechanism comprises a piston rod part and an end cover, the piston rod part comprises a piston which is movably and hermetically mounted in the piston mounting cavity and a top contact rod which is connected to the center of the upper end of the piston, the upper end of the top contact rod penetrates into the inner cavity of the valve body to coaxially contact with the bottom of the valve clack in a propping mode, the valve body is fixedly connected with the end cover in a sealing mode at the lower end of the piston mounting cavity, and the piston mounting cavity is connected with a first pneumatic connector at the lower end of the piston.

Preferably, the piston mounting cavity is connected with a second pneumatic connector at the upper end of the piston.

The valve has the advantages that the valve clack and the spring are arranged in the valve body from top to bottom, and the valve cover is arranged, so that the upper part of the emergency cut-off valve can be assembled, the valve body, the valve clack and the valve cover are convenient to assemble and disassemble, and as the valve body, the valve clack and the valve cover are of an integrated structure, the sealing between the valve rod and the valve cover is reduced after the valve rod is cancelled, compared with the traditional structure, the leakage point of the integrated structure is reduced, the sealing is reliable, the safety performance is improved, meanwhile, the radial movement of the spring is limited through the inner side wall of the spring limiting groove, and the radial limiting effect of the screw on the spring in the spring telescoping process can be replaced.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.

FIG. 1 is a front cross-sectional view of the overall structure of an embodiment of the present utility model;

FIG. 2 is a front view of the overall structure of an embodiment of the present utility model;

FIG. 3 is a front view of a valve flap in an embodiment of the utility model;

FIG. 4 is a front cross-sectional view of a valve flap in an embodiment of the utility model;

In the figure, 1, a valve body, 2, a valve clack, 3, a spring, 4, a valve cover, 5, a piston mounting cavity, 6, a top contact rod, 7, a piston, 8, an end cover, 9, a first pneumatic connector, 10, a second pneumatic connector, 11, a mounting cavity, 12, a cutting cavity, 13, a first limit ring surface, 21, a first ring surface, 22, a second ring surface, 23, a third ring surface, 24, a fourth ring surface, 25, a first ring groove, 41, a guide convex part, 101, a silencer, 111, a radial window, 201, a first cavity surface, 202, a second cavity surface, 203, a third cavity surface, 204, a first transition ring surface, 205, a second limit ring surface, 206, a balance hole, 211, a first caulking groove, 212, a second caulking groove, 231, a limit ring surface, 232, a limit step, 233, a balance ring groove, 234, a seal ring groove, 235, a seal gasket, 2111, a seal ring, 2121, a guide ring.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.

It should be noted that, in the embodiments of the present utility model, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described one by one.

The terms of direction and position in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the utility model and are not intended to limit the scope of the utility model.

As shown in fig. 1 to 4, in the embodiment of the present utility model, an integral emergency shut-off valve includes a valve body 1, a valve clack 2, a spring 3, a valve cover 4 and a pneumatic mechanism, wherein the valve body 1 is fixedly and sealingly installed at the bottom of an oil storage tank by an upper flange, the valve cover 4 is fixedly installed at an upper end channel port of the valve body 1 and forms a medium cavity with an inner cavity of the valve body 1, the valve clack 2 is dynamically and sealingly installed in the medium cavity, the pneumatic mechanism is used for driving the valve cover 4 to move towards the upper end of the valve body 1, the inner cavity of the valve body 1 sequentially includes an installation cavity 11 and a shut-off cavity 12 which are communicated from top to bottom, the valve body 1 has a radial window 111 which is communicated with the installation cavity 11 and the outside of the valve body 1, the caliber of the top end of the shut-off cavity 12 is smaller than the caliber of the bottom end of the installation cavity 11 and forms a first limit ring surface 13 between the installation cavity and the installation cavity, the valve clack 2 is in butt-mounted on the first limit ring surface 13, the center of the valve clack 2 has a spring limit groove with the upper end which is communicated with the installation cavity 11, one end of the spring 3 is connected to the valve cover 4, the other end of the valve cover is located in the spring limit groove, and the end is connected to the bottom of the spring seal groove, and the end is connected to the bottom of the spring 1, and the spring 3 is in a radial state and is in a state of being opened with the radial window 12 and has a radial window 12 and is in a state connected to the radial state with the cut-off window 13 and has a radial window 12.

Through this setting, from last valve clack and spring to the internal valve of packing into down, the installation valve gap again can urgent trip valve upper portion, and not only the dismouting is convenient, and because valve body, valve clack, valve gap are all integral type structure, have reduced the valve rod behind the cancellation valve rod and have sealed between valve gap, have reduced overall structure's leak point in traditional structure, and sealed reliable, the security performance obtains promoting.

Meanwhile, the radial movement of the spring is limited by the inner side wall of the spring limiting groove, so that the radial limiting effect of the screw on the spring in the spring stretching process can be replaced.

The valve clack compresses the spring and moves upwards to open under the action of the pneumatic mechanism, and when the pneumatic mechanism does not act on the valve clack, the valve clack moves downwards to close under the reset action of the spring.

The inner cavity of the valve clack 2 is provided with a first cavity part 201, a second cavity part 202 and a third cavity part 203 which are concentrically arranged and sequentially communicated from top to bottom, the first cavity part 201 and the second cavity part 202 form a spring installation cavity,

The caliber of the third cavity part 203 is smaller than that of the second cavity part 202, and a second limiting ring surface 205 is formed at the joint of the third cavity part and the second cavity part, the lower end part of the spring 3 is positioned in the second cavity part 202, the bottom end of the spring is propped against the second limiting ring surface 205,

The bottom of the valve clack 2 is provided with a balance hole 206 which is communicated with the third cavity 203 and the cutting cavity 12.

Through the arrangement, the bottom end of the spring is abutted to a second limiting ring surface formed in the inner cavity of the valve clack, and particularly, the spring can be welded and fixed on the second limiting ring surface or can be fixed on the second limiting ring surface through a detachable structure, the lower end of the spring is positioned in the second cavity, so that the inner wall of the valve clack positioned at the second cavity has the effect of limiting radial movement of the valve clack in the process of stretching and retracting the spring, the caliber of the first cavity is larger than that of the second cavity, the disassembly and assembly of the spring are facilitated, and the balance hole is used for balancing the pressure of the valve clack and ensuring the sealing between the valve clack and the valve body in the closed state.

The caliber of the second cavity portion 202 is smaller than that of the first cavity portion 201, and a first transitional annular surface 204 is formed at the joint of the first transitional annular surface 204 and the first cavity portion 201, and the second cavity portion 202 has smooth convex curved surfaces in transition.

Through this setting, reduce the assembly in-process, wearing and tearing between spring and the valve clack inner chamber wall, simultaneously, smooth protruding curved surface transition is favorable to reducing the stress concentration of valve clack, makes its lift more steady.

The valve clack 2 comprises a first ring part 21, a second ring part 22, a third ring part 23 and a fourth ring part 24 which are sequentially connected from top to bottom, the peripheral calibers of the first ring part 21 and the third ring part 23 are matched with the caliber of a medium cavity and the cavity walls of the first ring part 21 and the third ring part are in sealing fit,

The outer diameter of the second ring part 22 is smaller than that of the first ring part 21 and the third ring part 23, the end surface of the outer circumferential surface of the second ring part 22 opposite to the first ring part 21 and the third ring part 23 forms a first ring groove 25 positioned in the mounting cavity part 11, the radial window 111 is communicated with the first ring groove 25 and the outside of the valve body 1,

The peripheral diameter of the fourth ring part 24 is smaller than that of the third ring part 23, and the lower end of the fourth ring part extends into the cutting cavity part 12 to be matched with the pneumatic mechanism.

Through this setting, radial window intercommunication first annular and valve body outside, the inside oil pressure of tank wagon acts on third annular portion upper end, has further improved the stability of sealing between valve clack and the valve body.

The lower end of the third ring part 23 is provided with a limiting ring part 231 which extends downwards near the ring surface of the cutting cavity part 12, the periphery of the limiting ring part 231 and the lower end surface of the third ring part 23 form a limiting step 232 which is in abutting fit with the first limiting ring surface 13, and the inner periphery of the limiting ring part 231, the lower end surface of the third ring part 23 and the outer periphery of the fourth ring part 24 form a balance ring groove 233.

Through this setting, spacing step and the cooperation of first spacing anchor ring can make the valve clack more stable with being connected of valve body, and the setting of balanced annular is favorable to cutting off the atmospheric pressure of chamber portion and further disperseing on the valve clack in the form that plane stress concentrated in the bottom, helps balanced valve clack internal stress.

A seal ring groove 234 is provided between the bottom of the third ring portion 23 and the upper portion of the limit ring portion 231, and a seal gasket 235 with an outer end abutting against the first limit ring surface 13 is embedded in the seal ring groove 234.

Through this setting, be favorable to improving the stability that sealing gasket and third ring portion are connected, make the sealed effect between valve clack and the valve body better simultaneously.

The middle outer periphery of the first ring part 21 is provided with a first caulking groove 211 in a surrounding manner, a sealing ring 2111 is embedded in the first caulking groove 211, a second caulking groove 212 is arranged at the upper and lower positions of the caulking groove 211 outside the first ring part 21, and a guide ring 2121 is arranged in the second caulking groove 212.

Through this setting, when guaranteeing valve clack and medium chamber seal stability, reduced the frictional loss between its and the medium chamber inner wall in the valve clack switching in-process.

The inside of valve gap 4 upper end is provided with the direction convex part 41 with one heart, the cover is located outside the direction convex part 41 to spring 3 upper end.

By this arrangement, the stability of the spring telescoping process is further improved.

The lower end of the valve body 1 is provided with a piston mounting cavity 5, the pneumatic mechanism comprises a piston rod part and an end cover 8, the piston rod part comprises a piston 7 which is mounted in the piston mounting cavity 5 in a dynamic seal manner and a top contact rod 6 which is connected to the center of the upper end of the piston 7, the upper end of the top contact rod 6 penetrates into the inner cavity of the valve body 1 to coaxially contact with the bottom of the valve clack 2 in a propping manner, the valve body 1 is fixedly connected with the end cover 8 in a sealing manner at the lower end of the piston mounting cavity 5, and the piston mounting cavity 5 is connected with a first pneumatic connector 9 at the lower end of the piston 7.

Through this setting, valve body and piston installation cavity structure as an organic whole, piston and top feeler lever structure as an organic whole have retrenched the overall structure of this device to the leakage point has been reduced, the sealing performance of device has further been improved. The first pneumatic connector is connected with an air source, after the air source is opened, the air pressure at the lower end of the piston is larger than the air pressure at the upper end, the piston rises and drives the piston rod to rise, the valve clack is further propped to rise, the valve clack is opened, the pneumatic mechanism is reset after the air source is closed, and meanwhile, the valve clack moves downwards to reset under the reset force of the spring.

The center of the end cover is provided with a fusible element, and when the pneumatic is unavailable or the air source fails, the fusible element can be opened in an emergency mode through a manual mode.

The piston mounting cavity 5 is connected with a second pneumatic connector 10 at the upper end of the piston 7. With this arrangement, the second pneumatic connector can be directly connected to a source of air for controlling the next pneumatic valve.

A muffler 101 is also connected to the upper part of the piston mounting chamber 5.

The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.

Claims (10)

1. The utility model provides an integral type emergency cut-off valve, includes valve body (1), valve clack (2), spring (3), valve gap (4) and pneumatic mechanism, and valve body (1) are by last flange fixed seal installation in oil storage tank bottom, valve gap (4) fixed mounting in valve body (1) upper end passway and with valve body (1) inner chamber formation medium chamber, valve clack (2) move sealed installation in medium intracavity, pneumatic mechanism is used for driving valve gap (4) to remove its characterized in that to valve body (1) upper end:

The inner cavity of the valve body (1) sequentially comprises a mounting cavity part (11) and a cutting cavity part (12) which are communicated from top to bottom, the valve body (1) is provided with a radial window (111) which is communicated with the mounting cavity part (11) and the outside of the valve body (1), the caliber of the top end of the cutting cavity part (12) is smaller than that of the bottom end of the mounting cavity part (11) and a first limiting ring surface (13) is formed between the two, the valve clack (2) is abutted and mounted on the first limiting ring surface (13),

The center of the valve clack (2) is provided with a spring limit groove, the upper end of the spring limit groove is communicated with the installation cavity part (11), one end of the spring (3) is connected with the valve cover (4), the other end of the spring is positioned in the spring limit groove, the end is connected with the bottom of the spring installation groove,

The valve clack (2) moves up and down under the action of the spring (3) and the pneumatic mechanism and has a closed state of propping against the first limiting ring surface (13) to form a seal with the valve clack and cutting off the communication of the radial window (111) and the cutting cavity part (12), and an open state of leaving the first limiting ring surface (13) and enabling the radial window (111) to be communicated with the cutting cavity part (12).

2. The integrated emergency shut-off valve according to claim 1, wherein the inner cavity of the valve clack (2) is provided with a first cavity part (201), a second cavity part (202) and a third cavity part (203) which are concentrically arranged from top to bottom and are sequentially communicated, the first cavity part (201) and the second cavity part (202) form a spring installation cavity,

The caliber of the third cavity part (203) is smaller than that of the second cavity part (202) and a second limiting ring surface (205) is formed at the joint of the third cavity part and the second cavity part, the lower end part of the spring (3) is positioned in the second cavity part (202) and the bottom end of the spring is propped against the second limiting ring surface (205),

The bottom of the valve clack (2) is provided with a balance hole (206) communicated with the third cavity part (203) and the cutting cavity part (12).

3. The integrated emergency shut-off valve according to claim 2, wherein the diameter of the second cavity portion (202) is smaller than that of the first cavity portion (201) and a first transitional annular surface (204) is formed at the joint of the second cavity portion and the first transitional annular surface (204), and the first transitional annular surface (204) is in smooth convex curved surface transition with the side wall of the first cavity portion (201) and the side wall of the second cavity portion (202).

4. The integrated emergency shut-off valve according to claim 1, wherein the valve clack (2) comprises a first ring part (21), a second ring part (22), a third ring part (23) and a fourth ring part (24) which are sequentially connected from top to bottom, the peripheral calibers of the first ring part (21) and the third ring part (23) are matched with the caliber of a medium cavity and form sealing fit with the cavity wall of the medium cavity,

The outer diameter of the second ring part (22) is smaller than that of the first ring part (21) and the third ring part (23), the end surface of the opposite side of the outer circumference ring surface of the second ring part (22) to the first ring part (21) and the third ring part (23) forms a first ring groove (25) positioned in the mounting cavity part (11), the radial window (111) is communicated with the first ring groove (25) and the outside of the valve body (1),

The peripheral diameter of the fourth ring part (24) is smaller than that of the third ring part (23), and the lower end of the fourth ring part extends into the cutting cavity part (12) to be matched with the pneumatic mechanism.

5. The integrated emergency shut-off valve according to claim 4, wherein a limiting ring part (231) is downwardly extended from the lower end of the third ring part (23) near the annular surface of the shut-off cavity part (12), a limiting step (232) in abutting fit with the first limiting annular surface (13) is formed between the outer periphery of the limiting ring part (231) and the lower end surface of the third ring part (23), and a balancing annular groove (233) is formed between the inner periphery of the limiting ring part (231) and the lower end surface of the third ring part (23) and the outer periphery of the fourth ring part (24).

6. The integrated emergency shut-off valve according to claim 5, wherein a sealing ring groove (234) is arranged between the bottom of the third ring part (23) and the upper part of the limiting ring part (231), and a sealing gasket (235) with the outer end propped against the first limiting ring surface (13) is embedded in the sealing ring groove (234).

7. The integrated emergency shut-off valve according to claim 4, wherein a first caulking groove (211) is formed in the middle of the first ring portion (21) in a surrounding manner, a sealing ring (2111) is embedded in the first caulking groove (211), a second caulking groove (212) is formed in the first ring portion (21) at the upper and lower positions of the caulking groove (211), and a guide ring (2121) is arranged in the second caulking groove (212).

8. The integrated emergency shut-off valve according to claim 1, wherein the upper end of the valve cover (4) is concentrically provided with a guide convex part (41), and the upper end of the spring (3) is sleeved outside the guide convex part (41).

9. The integrated emergency shut-off valve according to claim 1, wherein the lower end of the valve body (1) is provided with a piston mounting cavity (5), the pneumatic mechanism comprises a piston rod part and an end cover (8), the piston rod part comprises a piston (7) mounted in the piston mounting cavity (5) in a dynamic seal manner and a top contact rod (6) connected to the center of the upper end of the piston (7), the upper end of the top contact rod (6) penetrates into the inner cavity of the valve body (1) to coaxially contact with the bottom of the valve clack (2), the valve body (1) is fixedly connected with the end cover (8) in a seal manner at the lower end of the piston mounting cavity (5), and the lower end of the piston mounting cavity (5) is connected with a first pneumatic connector (9) at the lower end of the piston (7).

10. An integrated emergency shut-off valve according to claim 9, characterized in that the piston mounting chamber (5) is connected with a second pneumatic connector (10) at the upper end of the piston (7).