An emergency automatic cut-off isolation ball valve and its emergency cut-off method

Abstract

The technical solution of the present invention discloses an emergency automatic cut-off isolation ball valve and its emergency isolation method, including a middle body with an inner cavity, a valve cover installed on the left side of the middle body, a side body installed on the side of the middle body, a switch valve group installed on the top of the middle body, and a right body installed on the right side of the middle body. Among them, an isolation valve group is installed in the inner cavity, a diversion pipe is arranged through the valve cover, the diversion pipe is connected to the side body, and an electromagnetic valve for controlling the on or off of the diversion pipe is installed on the diversion pipe in the valve cover. By adding an isolation valve group for emergency isolation to the existing ball valve, the present invention can realize the function of automatically cutting off and isolating the medium of the ball valve when encountering emergencies, thereby reducing accident losses and stopping losses in time.

Description

Technical Field

[0001] The present invention relates to the technical field of ball valves, and in particular to an emergency automatic cut-off isolation ball valve and an emergency isolation method thereof. Background Art

[0002] In the field of valves, ball valves have the advantages of small resistance to the flowing medium, short opening and closing time, convenient operation, reliable sealing performance, wide application range, etc. compared with other types of valves. They are applied in many aspects such as aerospace, petrochemical industry, long-distance pipelines, food, and construction.

[0003] Since ball valves need to rely on driving devices to achieve the connection and disconnection of the medium. Due to special reasons in the petrochemical industry and long-distance pipelines, etc., under the normal operation of the equipment, in case of certain emergencies, the ball valve cannot automatically cut off the medium, cannot isolate the connection between the upstream and downstream media, and cannot reduce the losses brought by emergencies. Summary of the Invention

[0004] The technical problem solved by the present invention is that the existing ball valves cannot automatically cut off the medium in case of emergencies and cannot stop losses.

[0005] To solve the above technical problems, the technical solution of the present invention provides an emergency automatic cut-off isolation ball valve, which includes a middle body with an inner cavity, a valve cover installed on the left side of the middle body, a side body installed on the side of the middle body, a switching valve group installed on the top of the middle body, and a right side body installed on the right side of the middle body. Among them, an isolation valve group is installed in the inner cavity, a diversion pipe is arranged through the inside of the valve cover, the diversion pipe is connected to the side body, and an electromagnetic valve for controlling the on or off of the diversion pipe is installed on the diversion pipe in the valve cover.

[0006] Optionally, the middle body is axially penetrated, the valve cover is installed on the left side, and the right side body is installed on the right side. The inner cavity of the middle body includes a left inner cavity and a right inner cavity. The right inner cavity and the inside of the right side body form a medium flow channel. The left inner cavity is divided into a left valve cavity and a right valve cavity by the isolation valve group. The diversion pipe is communicated with the inside of the left valve cavity and the side body.

[0007] Optionally, the isolation valve group includes an isolation valve core with a piston rod. The diameter of the isolation valve core is equal to or smaller than the inner diameter of the left valve cavity. A guiding valve seat is arranged at a position of the right inner cavity close to the left inner cavity. The piston rod penetrates through the guiding valve seat. A limiting valve core is arranged at a position of the piston rod close to the end far from the isolation valve core. The limiting valve core contacts or separates from the guiding valve seat when the piston rod moves relative to the guiding valve seat.

[0008] Optionally, an inner through hole is axially penetrated through the inside of the piston rod, and the outlet of the inner through hole faces the left valve cavity.

[0009] Optionally, a seal is installed between the contact surfaces of the limit valve core and the guiding valve seat.

[0010] Optionally, the switching valve group includes a switching valve body, a valve rod installed in the switching valve body, a driving handwheel for controlling the rotation of the valve rod, a stuffing box fixed to the bottom of the switching valve body, a sphere installed in the right inner cavity of the middle body, and a fixed shaft fixed to the bottom of the middle body. The sphere has a structure with a through hole penetrating in the horizontal direction, and the valve rod controls the horizontal rotation of the sphere to realize the connection or cut-off of the medium flow channel and the right valve cavity.

[0011] Optionally, the stuffing box penetrates through the top of the middle body, the valve rod passes through the valve body and the stuffing box and is fixed to the sphere in the right inner cavity, and the fixed shaft penetrates through the bottom of the middle body and is fixed to the sphere in the right inner cavity.

[0012] Optionally, the driving handwheel is connected to a driving structure installed in the valve body, the driving structure is connected to the valve rod. During the rotation of the driving handwheel, the valve rod is driven to rotate clockwise or counterclockwise through the driving structure, and the valve rod drives the sphere to rotate clockwise or counterclockwise to realize the connection or cut-off of the medium flow channel and the right valve cavity through the through hole of the sphere.

[0013] To solve the above technical problems, the technical solution of the present invention also provides an emergency isolation method for the emergency automatic cut-off isolation ball valve according to any one of the above. The emergency isolation method is as follows:

[0014] When in an emergency state, the solenoid valve stops working, the medium cannot pass through the diversion pipe, the left valve cavity actively becomes a sealed valve cavity, and the medium flows into the right valve cavity and the left valve cavity respectively through the medium flow channel and the inner through hole of the isolation valve group. Due to the cross-sectional area difference of the isolation valve core, under the same pressure, the pressure in the left valve cavity gradually becomes higher than the pressure in the right valve cavity. The isolation valve group moves towards the guiding valve seat. When the limit valve core contacts the guiding valve seat, the medium passing through the medium flow channel is cut off, realizing the active cut-off and isolation of the medium by the emergency automatic cut-off isolation ball valve.

[0015] The beneficial effects of the technical solution of the present invention are:

[0016] By adding an isolation valve group for emergency isolation to the existing ball valve, the present invention can realize the function of automatically cutting off and isolating the medium of the ball valve when encountering emergencies, thereby reducing accident losses and stopping losses in time. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the emergency automatic cut-off isolation ball valve in the embodiment of the present invention;

[0018] Figure 2 This is a longitudinal sectional view of the emergency automatic cut-off isolation ball valve in the embodiment of the present invention;

[0019] Figure 3 This is a top sectional view of the emergency automatic cut-off isolation ball valve in the embodiment of the present invention. Detailed implementation manners

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but it is not intended to limit the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0023] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0025] Please refer to Figure 1 、 Figure 2 and Figure 3 As shown in

[0026] In this embodiment, the isolation valve group includes an isolation valve core 8 with a piston rod 24. The diameter of the isolation valve core 8 is equal to or less than the inner diameter of the left valve chamber 14. A guiding valve seat 18 is provided at a position of the right inner cavity 22 close to the left inner cavity 21. The piston rod 24 penetrates through the guiding valve seat 18. A limiting valve core 25 is provided at a position of the piston rod 24 close to the end away from the isolation valve core 8. The limiting valve core 25 contacts or separates from the guiding valve seat 18 when the piston rod 24 moves relative to the guiding valve seat 18. An inner through hole 20 is axially and penetratingly provided inside the piston rod 24. The outlet of the inner through hole 20 faces the left valve chamber 14. A seal is installed between the contact surface of the limiting valve core 24 and the guiding valve seat 18.

[0027] In this embodiment, the switching valve group 26 includes a switching valve body 27, a valve rod 9 installed inside the switching valve body 27, a driving handwheel 10 for controlling the rotation of the valve rod 9, a stuffing box 17 fixed to the bottom of the switching valve body 27, a sphere 4 installed in the right inner cavity 22 of the middle body 1, and a fixed shaft 6 fixed to the bottom of the middle body 1. The sphere 4 has a structure with a through hole penetrating in the horizontal direction. The valve rod 9 controls the horizontal rotation of the sphere 14 to achieve the connection or cut-off of the medium flow channel 13 and the right valve cavity 15.

[0028] In this embodiment, the stuffing box 17 penetrates through the top of the middle body 1. The valve rod 9 passes through the valve body 27 and the stuffing box 17 and is fixed to the sphere 14 in the right inner cavity 22. The fixed shaft 6 penetrates through the bottom of the middle body 1 and is fixed to the sphere 14 in the right inner cavity 22. The driving handwheel 10 is connected to a driving structure (not shown, the driving mechanism is not the technology protected by this patent and is prior art, so it will not be elaborated here) installed inside the valve body 27. The driving structure is connected to the valve rod 9. During the rotation of the driving handwheel 10, the valve rod 9 is driven to rotate clockwise or counterclockwise through the driving structure, and the valve rod 9 drives the sphere 14 to rotate clockwise or counterclockwise to achieve the connection or cut-off of the medium flow channel 13 and the right valve cavity 15 through the through hole of the sphere 14.

[0029] The characteristics and functions of the present invention are further understood through the following description.

[0030] This embodiment also provides an emergency isolation method for the emergency automatic cut-off isolation ball valve according to any one of the above. The emergency isolation method is as follows:

[0031] When in an emergency state, the solenoid valve 12 stops working, and the medium cannot pass through the diversion pipe 19. The left valve cavity 14 actively becomes a sealed valve cavity. The medium flows into the right valve cavity 15 and the left valve cavity 14 through the medium flow channel 13 and the inner through hole 20 of the isolation valve group respectively. Due to the cross-sectional area difference of the isolation valve core 8, under the same pressure, the pressure in the left valve cavity 14 gradually becomes higher than the pressure in the right valve cavity 15. The isolation valve group moves towards the guiding valve seat 18. When the limit valve core 25 contacts the guiding valve seat 18, the medium passing through the medium flow channel 13 is cut off, realizing the active cut-off and isolation of the medium by the emergency automatic cut-off isolation ball valve.

[0032] In summary, by adding an isolation valve group for emergency isolation to the existing ball valve, the present invention can achieve the function of automatically cutting off and isolating the medium of the ball valve when encountering emergencies, thereby reducing accident losses and stopping losses in a timely manner.

[0033] The above are only preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention accordingly. For those skilled in the art, it should be realized that all equivalent replacements and obvious changes made by using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An emergency automatic cut-off isolation ball valve, characterized in that, it includes a middle body with an inner cavity, a valve cover installed on the left side of the middle body, a side body installed on the side of the middle body, a switch valve group installed on the top of the middle body, and a right side body installed on the right side of the middle body. Among them, an isolation valve group is installed in the inner cavity, a diversion pipe is penetrated and arranged inside the valve cover, the diversion pipe is connected to the side body, and an electromagnetic valve for controlling the conduction or cut-off of the diversion pipe is installed on the diversion pipe inside the valve cover; the middle body is penetrated in the axial direction, the valve cover is installed on the left side, and the right side body is installed on the right side. The inner cavity of the middle body includes a left inner cavity and a right inner cavity. The right inner cavity and the inside of the right side body form a medium flow channel. The left inner cavity is divided into a left valve cavity and a right valve cavity by the isolation valve group, and the diversion pipe is communicated with the inside of the left valve cavity and the side body; the isolation valve group includes an isolation valve core with a piston rod. The diameter of the isolation valve core is equal to or smaller than the inner diameter of the left valve cavity. A guiding valve seat is arranged at the position of the right inner cavity close to the left inner cavity. The piston rod penetrates through the guiding valve seat. A limiting valve core is arranged at one end of the piston rod close to and away from the isolation valve core. The limiting valve core contacts or separates from the guiding valve seat when the piston rod moves relative to the guiding valve seat; an inner through hole is axially penetrated and arranged inside the piston rod, and the outlet of the inner through hole faces the left valve cavity; a seal is installed between the contact surface of the limiting valve core and the guiding valve seat.

2. The emergency automatic cut-off isolation ball valve according to claim 1, characterized in that, the switch valve group includes a switch valve body, a valve rod installed in the switch valve body, a driving handwheel for controlling the rotation of the valve rod, a stuffing box fixed to the bottom of the switch valve body, a ball installed in the right inner cavity of the middle body, and a fixed shaft fixed to the bottom of the middle body. The ball is a structure with a horizontally penetrated through hole. The valve rod controls the horizontal rotation of the ball to realize the connection or cut-off between the medium flow channel and the right valve cavity.

3. The emergency automatic cut-off isolation ball valve according to claim 2, characterized in that, the stuffing box penetrates through the top of the middle body. The valve rod passes through the valve body and the stuffing box and is fixed to the ball in the right inner cavity. The fixed shaft penetrates through the bottom of the middle body and is fixed to the ball in the right inner cavity.

4. The emergency automatic cut-off isolation ball valve according to claim 2, characterized in that, the driving handwheel is connected to a driving structure installed in the valve body. The driving structure is connected to the valve rod. During the rotation of the driving handwheel, the valve rod is driven to rotate clockwise or counterclockwise through the driving structure. The valve rod drives the ball to rotate clockwise or counterclockwise to realize the connection or cut-off between the medium flow channel and the right valve cavity through the through hole of the ball.

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