Eccentric semi-ball valve capable of being maintained on line

Abstract

The invention discloses an eccentric semi-ball valve capable of being maintained on line. The eccentric semi-ball valve comprises a valve body, a valve element, a sealing seat and a driving assembly. A valve cavity is formed in the valve body, a first opening, a second opening and a maintenance opening which are communicated with the valve cavity are further formed in the valve body, and a detachable valve deck is connected outside the maintenance opening in a sealed mode. The valve element is rotatably installed in the valve cavity and comprises a sealing disc and a main sealing piece arranged on the sealing disc, and the main sealing piece can rotate along with the valve element and switch the position between the first opening and the maintenance opening. The sealing seat is positioned in the maintenance opening; the driving assembly is connected with the sealing seat and can drive the sealing seat to rotate; during online maintenance, the driving assembly drives the sealing seat to rotate to be in contact sealing with the sealing disc, the sealing disc, the sealing seat and the valve deck form an isolation cavity at the maintenance opening, the main sealing piece is located in the isolation cavity, and the main sealing piece can be maintained by disassembling the valve deck. According to the scheme, the eccentric semi-ball valve is simpler in structure, and the overhauling process is faster.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and more particularly to an eccentric hemispherical valve which can be maintained online. Background Art

[0002] During the use of the eccentric hemispherical valve or when it reaches the end of its service life, the valve core seal ring will be worn or damaged, and the valve will leak. The damaged seal ring needs to be replaced. When replacing the damaged seal ring, the water supply must be stopped and the valves before and after the pipeline must be closed before replacement. However, in some application scenarios, the pipeline is not allowed to stop the water supply, and the purpose of replacing the seal ring of the eccentric hemispherical valve in the working state cannot be achieved, resulting in the leakage problem caused by the damaged seal ring cannot be solved in time.

[0003] In order to replace the worn or damaged sealing ring in time without stopping the water supply when the valve core sealing ring is found to be worn or damaged, resulting in water leakage in the valve, in the prior art, for example, the authorization announcement number CN219866371U discloses an eccentric hemispherical valve, in which a liftable sealing valve seat is provided inside the valve, and after the eccentric hemispherical valve is fully opened, the liftable sealing valve seat can be lowered to its lower end to abut and seal against the outer side of the hemispherical valve disc, thereby forming a closed pressure chamber between the valve cover and the hemispherical valve disc. Another example is the announcement number CN111365472A discloses an online maintenance valve, in which a movable part is provided, and an inspection port is provided on the valve body, and the movable part is installed at the inspection port and is sealed and connected between the valve body; the valve core can be switched and rotated between the inlet or outlet and the inspection port; when the valve needs to be inspected, the movable part moves downward to seal and contact the valve core to isolate the valve cavity from the inspection port, and the first sealing component is located in the inspection port.

[0004] In the existing scheme, the valve can be repaired online by controlling the sealing valve seat or the movable part to move up and down to seal the valve core during the valve's online operation. However, in the existing scheme, the driving part for controlling the sealing valve seat or the movable part to move up and down is a bolt through a screw, and multiple driving parts need to be loosened and tightened each time, resulting in many parts and a complex structure. In addition, many parts need to be disassembled and installed during the maintenance process, resulting in low maintenance efficiency. Summary of the invention

[0005] The present invention provides an eccentric hemispherical valve that can be maintained online. In this solution, the sealing seat can be in sealing contact with the valve core more conveniently, and the structure of the eccentric hemispherical valve is further simplified, thereby improving the maintenance efficiency.

[0006] In order to achieve the above object, the technical solution provided by the present invention is:

[0007] An eccentric hemispherical valve capable of online maintenance and repair comprises:

[0008] A valve body, wherein a valve cavity is formed in the valve body, and a first opening, a second opening and a maintenance port communicating with the valve cavity are also provided on the valve body, and the maintenance port is externally sealed and connected to a detachable valve cover;

[0009] A valve core is rotatably mounted in the valve cavity, comprising a sealing disk and a main sealing member arranged on the sealing disk, wherein the main sealing member can rotate with the valve core and switch positions between the first opening and the maintenance port;

[0010] Also includes:

[0011] A sealing seat, located in the maintenance port;

[0012] A driving assembly connected to the sealing seat and capable of driving the sealing seat to rotate;

[0013] During online maintenance, the driving assembly drives the sealing seat to rotate until it contacts and seals with the sealing disk. The sealing disk, the sealing seat and the valve cover form an isolation chamber at the maintenance port. The main seal is located in the isolation chamber. The main seal can be inspected by disassembling the valve cover.

[0014] As a further improvement, the drive assembly includes a connecting shaft and a driving part, one end of the connecting shaft passes through the valve body and is connected to a side of the sealing seat close to the second opening, and the other end is connected to the driving part; the driving part drives the connecting shaft to rotate the sealing seat.

[0015] As a further improvement, the driving part is a driving handle, and a first connecting hole is provided on the driving handle for fixed connection with the connecting shaft.

[0016] As another improvement, the driving assembly further comprises a locking plate and a locking rod, wherein the locking plate is fixedly arranged relative to the valve body, and the connecting shaft passes through the locking plate and is connected to the driving part; the locking rod is located on the driving part and rotates with the driving part;

[0017] The locking disk is provided with a first locking fitting portion, and the locking rod is provided with a second locking fitting portion. When the locking rod rotates following the driving portion, the second locking fitting portion can be selectively connected with the first locking fitting portion to lock and position the sealing seat.

[0018] As a preferred embodiment, the first locking fitting portion includes a first locking position and a second locking position; the second locking fitting portion includes a locking protrusion;

[0019] When the locking protrusion is rotated to be matched with the first locking position, the sealing seat can be locked in a position where it contacts and seals with the sealing disk;

[0020] When the locking protrusion is rotated to be in cooperation with the second locking position, the sealing seat can be locked at a position where the isolation cavity is fully opened.

[0021] Furthermore, the locking disk is also provided with limiting edges, the limiting edges are located on both sides of the first locking fitting portion, and the limiting edges are used to limit the driving portion.

[0022] In one embodiment, the sealing seat is annular, an outer seal is provided on the outer ring side wall of the sealing seat, and an inner seal is provided on the inner ring side wall of the sealing seat; during online maintenance, the outer seal is sealed to the maintenance port, and the inner seal is sealed to the sealing disk.

[0023] As a further improvement, a pressure plate is fixedly connected to the sealing disk of the valve core to fix the main sealing component.

[0024] As another improvement, an elastic pad is further arranged between the valve body and the valve cover.

[0025] As another improvement, a valve seat is disposed near the valve cavity at the first opening, and the main sealing member can be in sealing contact with the valve seat to correspondingly close the valve.

[0026] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0027] (1) The present invention provides an eccentric hemispherical valve that can be maintained and repaired online. During online maintenance, the main seal rotates to the maintenance port, and the sealing seat is controlled to rotate to form an isolation chamber. The main seal can be repaired after the valve cover is removed. After the maintenance is completed, the sealing seat rotates in the other direction to open the isolation chamber, and then the valve cover is installed to complete the maintenance process. The eccentric hemispherical valve in this solution has a simpler structure and a faster maintenance process.

[0028] (2) The present invention is an eccentric hemispherical valve that can be maintained and repaired online. The drive assembly includes a connecting shaft and a drive part. The connecting shaft passes through the valve body and is connected to the side of the sealing seat near the second opening. The valve seat is arranged near the first opening of the valve cavity to avoid interference between the valve core and the sealing seat during rotation.

[0029] (3) The eccentric hemispherical valve of the present invention can be maintained and repaired online, and the sealing seat is locked and positioned by connecting the second locking fitting part with the first locking fitting part, without the need to set up other locking structures for locking, making the locking and positioning of the sealing seat more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is the front view of the eccentric hemispherical valve;

[0031] Figure 2 This is the right view of the eccentric hemispherical valve;

[0032] Figure 3 for Figure 2 Sectional view of AA section of the center eccentric hemispherical valve;

[0033] Figure 4 for Figure 3 A magnified view of the structure at B in the middle;

[0034] Figure 5 This is a schematic diagram of the state where the sealing seat is rotated to open the isolation chamber;

[0035] Figure 6 For eccentric hemispherical valve Figure 1 ;

[0036] Figure 7 For eccentric hemispherical valve Figure 2 ;

[0037] Figure 8 It is an enlarged structural diagram of the driving member, the locking disk and the locking rod;

[0038] Fig. 9 This is a schematic diagram of the position of the valve core and the sealing seat in the online maintenance state;

[0039] Fig.10 for Figure 8 Enlarged view of the structure at point C in the middle.

[0040] Description of labels:

[0041] 1. Valve body; 11. Valve cavity; 12. Valve seat; 13. First opening; 14. Second opening; 15. Maintenance port; 16. Valve core; 161. Main seal; 162. Pressure plate; 17. Valve shaft;

[0042] 2. Valve cover; 21. Elastic pad;

[0043] 31. driving part; 311. first connecting hole; 32. locking plate; 321. first locking position; 322. second locking position; 323. limiting edge; 324. avoidance hole; 33. locking rod; 331. locking protrusion; 34. connecting shaft;

[0044] 4. Sealing seat; 41. External sealing member; 42. Internal sealing member. DETAILED DESCRIPTION

[0045] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0046] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0047] The terms such as "upper", "lower", "left", "right", "middle" etc. cited in this specification are only for the convenience of description and are not used to limit the scope of implementation. The change or adjustment of their relative relationship shall be regarded as the scope of implementation of the present invention without substantial change of technical content. Moreover, in addition to being used to indicate orientation or position relationship, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0049] The eccentric hemispherical valve that can be maintained online provided in this embodiment is mainly installed on the conveying pipeline of the liquid medium. An eccentric valve core is arranged in the eccentric hemispherical valve. When the valve core rotates to different positions, the valve can be closed to cut off the flow of the medium, or the valve can be opened to allow the medium to flow, or the flow rate can be adjusted. The liquid medium is water, oil or other fluid substances. In this embodiment, for the convenience of description, the liquid medium is described as water.

[0050] Combination Figure 1 , Figure 2 and Figure 3 As shown, the online maintainable eccentric hemispherical valve in this embodiment includes a valve body 1, a valve core 16, a sealing seat 4 and a drive assembly.

[0051] A valve cavity 11 is formed in the valve body 1. A first opening 13, a second opening 14 and a maintenance port 15 communicating with the valve cavity 11 are also provided on the valve body 1. The maintenance port 15 is sealed and connected to a detachable valve cover 2. Figure 3 As shown, specifically, the first opening 13 and the second opening 14 are located on the left and right sides of the valve body 1 respectively, and the first opening 13 and the second opening 14 are located on the same axis, and the maintenance port 15 is located on the upper side of the valve body 1 .

[0052] After the eccentric hemispherical valve is installed in the pipeline system, when there is liquid flowing in the valve body 1, if the liquid flows from the first opening 13 to the second opening 14, the first opening 13 is the inlet and the second opening 14 is the outlet; if the liquid flows from the second opening 14 to the first opening 13, the second opening 14 is the inlet and the first opening 13 is the outlet. The specific settings of the inlet and outlet of the valve body are determined according to the installation conditions of the hemispherical valve in the pipeline system. For the sake of convenience, in this embodiment, the first opening 13 is described as the inlet and the second opening 14 is described as the outlet, and the liquid enters the first opening 13 and circulates in the valve.

[0053] The outer side of the maintenance port 15 is sealed and connected to the valve cover 2 to prevent liquid leakage during valve operation. In order to improve the sealing between the valve cover 2 and the valve body 1, an elastic pad 21 is also provided between the valve body 1 and the valve cover 2. The valve cover 2 can be fixedly connected to the valve body 1 by bolts, and the valve cover 2 can be removed by removing the bolts. When the bolts are fixedly connected to the valve body 1, tightening the screws squeezes the elastic pad 21 between the valve body 1 and the valve cover 2, thereby improving the sealing between the valve cover 2 and the valve body 1.

[0054] The valve core 16 is rotatably installed in the valve cavity 11, and includes a sealing disk and a main sealing member 161 disposed on the sealing disk. The main sealing member 161 can rotate with the valve core 16 and switch positions between the first opening 13 and the maintenance port 15. The valve core 16 is connected to the valve shaft 17, and the valve shaft 17 passes through the valve body 1 to the outside of the valve body 1 and is connected to the actuator, and the valve core 16 is driven to rotate by the actuator. For example, the actuator can use a servo motor, and the valve core 16 is driven to rotate by the servo motor. The main sealing member 161 is disposed on the sealing disk, and the main sealing member 161 is used to seal when the eccentric hemispherical valve is closed.

[0055] The sealing disc of the valve core 16 is also fixedly connected with a pressure plate 162 for fixing the main seal 161. The pressure plate 162 is detachably fixed to the sealing disc, and one side of the pressure plate 162 abuts against one side of the main seal 161 and presses the main seal 161 to fix the main seal 161. When the main seal 161 needs to be replaced, the pressure plate 162 is removed, thereby removing the main seal 161. In this embodiment, the pressure plate 162 is fixed to the sealing disc by bolts. Of course, in other embodiments, the pressure plate 162 can be fixed to the sealing disc by other methods.

[0056] Combination Figure 3 , Figure 4 and Figure 5As shown, the sealing seat 4 is located in the maintenance port 15, and the driving assembly is connected to the sealing seat 4 and can drive the sealing seat 4 to rotate. During online maintenance, the driving assembly drives the sealing seat 4 to rotate until it contacts and seals with the sealing disk. The sealing disk, the sealing seat 4 and the valve cover 2 form an isolation chamber at the maintenance port 15. The main seal 161 is located in the isolation chamber. The main seal 161 can be inspected by disassembling the valve cover 2.

[0057] Specifically, the driving assembly includes a connecting shaft 34 and a driving part 31. One end of the connecting shaft 34 passes through the valve body 1 and is connected to a side of the sealing seat 4 close to the second opening 14, and the other end is connected to the driving part 31. The driving part 31 drives the connecting shaft 34 to rotate the sealing seat 4.

[0058] The side of the sealing seat 4 close to the second opening 14 is connected to the connecting shaft 34, and the sealing seat 4 rotates around the center of the connecting shaft 34 when rotating. The valve seat 12 is arranged near the valve cavity 11 of the first opening 13, and the valve shaft 17 drives the valve core 16 to rotate, so that the valve core 16 switches between the first opening 13 and the maintenance port 15. When the eccentric hemispherical valve is in operation, the actuator drives the valve core 16 to rotate to the maintenance port 15, so that the first opening 13 and the second opening 14 are connected; when the eccentric hemispherical valve is closed, the actuator drives the valve core 16 to rotate to the first opening 13, and the main seal 161 contacts the valve seat 12 in a sealing manner to close the first opening 13, thereby closing the eccentric hemispherical valve.

[0059] During the long-term operation of the eccentric hemispherical valve, the main seal 161 will age or wear, and the main seal 161 needs to be regularly maintained. In this embodiment, when the eccentric hemispherical valve is operating normally online, the main seal 161 is maintained in an online maintenance manner. Specifically, when the eccentric hemispherical valve needs to be maintained online, the actuator drives the valve core 16 to rotate to the maintenance port 15, so that the axis of the sealing disk coincides with the axis of the maintenance port 15, and the driving assembly drives the sealing seat 4 to rotate to contact and seal with the sealing disk. The sealing disk, the sealing seat 4 and the valve cover 2 form an isolation chamber at the maintenance port 15, and the main seal 161 is located in the isolation chamber. The valve cover 2 can be disassembled to repair the main seal 161.

[0060] like Figure 3 As shown, when the eccentric hemispherical valve is maintained online, the main seal 161 rotates with the valve core 16 to the maintenance port 15, and the sealing seat 4 is controlled to rotate toward the valve core 16 to form an isolation chamber. The main seal 161 can be maintained after the valve cover 2 is disassembled. Figure 5 As shown, after the maintenance is completed, the sealing seat 4 is rotated in a direction away from the valve core 16 to open the isolation chamber, and then the valve cover 2 is installed to complete the maintenance process. The eccentric hemispherical valve in this solution has a simpler structure and a faster maintenance process.

[0061] It should be noted that in the eccentric hemispherical valve, Figure 5As shown, the first opening 13 and the second opening 14 are located on the same axis, the radial line on the valve shaft 17 perpendicular to the axis of the first opening 13 and the second opening 14 is the center line aa, and the axis of the valve core 16 sealing disk is the center line bb. In this embodiment, the sealing seat 4 is annular, specifically circular, and the axis of the sealing seat 4 coincides with the axis of the maintenance port 15. When performing online maintenance, the valve core 16 sealing disk is located in the maintenance port 15, the center line bb coincides with the axis of the maintenance port 15, and the center line bb is offset to the side of the center line aa close to the second opening 14. The valve seat 12 is arranged at the first opening 13, and the connecting shaft 34 is connected to the side of the sealing seat 4 close to the second opening 14. Figure 3 The middle is a state diagram of the isolation chamber formed during the overhaul of the eccentric hemispherical valve. After the overhaul is completed, the connecting shaft 34 rotates clockwise to open the isolation chamber, forming the following Figure 5 In the state shown in , the valve operates normally. When the valve needs to be closed, the valve shaft 17 drives the valve seat 12 to rotate counterclockwise, so that the main seal 161 contacts and seals with the valve seat 12. When the valve core 16 rotates to switch positions between the first opening 13 and the maintenance port 15, the connecting shaft 34 needs to drive the sealing seat 4 to rotate to a position where the isolation chamber is fully opened to avoid interference between the valve core 16 and the sealing seat 4 when rotating.

[0062] During online maintenance, in order to improve the sealing performance of the isolation chamber, an outer seal 41 is provided on the outer ring side wall of the seal seat 4, and an inner seal 42 is provided on the inner ring side wall of the seal seat 4. Preferably, the outer seal 41 and the inner seal 42 are elastic O-rings. During online maintenance, the seal seat 4 is rotated to contact and seal with the sealing disk, and after the sealing disk, the sealing seat 4 and the valve cover 2 form an isolation chamber at the maintenance port 15, the outer seal 41 is sealed and connected to the inner side wall of the maintenance port 15, and the inner seal 42 is sealed and connected to the sealing disk.

[0063] Combination Figure 6 , Figure 7 and Figure 8 As shown, the driving part 31 is a driving handle, and a first connecting hole 311 is provided on the driving handle for fixed connection with the connecting shaft 34. The first connecting hole 311 can be set as a square hole, and the end of the connecting shaft 34 is also set as a square, and is matched with the first connecting hole 311 to make the connecting shaft 34 rotate synchronously when the driving handle rotates. In other cases, the first connecting hole 311 can also be fixedly connected with the connecting shaft 34 in other ways, as long as the connecting shaft 34 rotates synchronously with the driving handle when it rotates.

[0064] During operation, the operator applies force to the driving handle to drive the driving handle to rotate, and the connecting shaft 34 rotates synchronously with the driving handle, thereby driving the sealing seat 4 to rotate. In other embodiments, the driving part 31 can also be other, for example, the driving part 31 can be an electric actuator, such as a servo motor; or a hydraulic actuator, such as a hydraulic cylinder; or a pneumatic actuator, such as a pneumatic cylinder.

[0065] Combination Figure 8 , Fig. 9 and Fig.10 As shown, preferably, the drive assembly further includes a locking disc 32 and a locking rod 33. The locking disc 32 is fixedly arranged relative to the valve body 1, and the locking disc 32 is fixed to the valve body 1 by bolts. In other cases, the locking disc 32 can also be fixed to the valve body 1 by welding or other methods. The connecting shaft 34 passes through the locking disc 32 and is connected to the driving part 31; the locking rod 33 is located on the driving part 31 and rotates with the driving part 31. The locking disc 32 is provided with an avoidance hole 324, and the diameter of the avoidance hole 324 is larger than the diameter of the connecting shaft 34. When the connecting shaft 34 passes through the locking disc 32, it passes through the avoidance hole 324.

[0066] The locking plate 32 is provided with a first locking fitting portion, and the locking rod 33 is provided with a second locking fitting portion. When the locking rod 33 rotates following the driving portion 31, the second locking fitting portion can be selectively connected to the first locking fitting portion to lock and position the sealing seat 4. When the locking rod 33 rotates following the driving portion 31 to the position where the sealing seat 4 is locked and positioned, the second locking fitting portion is connected to the first locking fitting portion; and when the sealing seat 4 is not in the locking position, the locking rod 33 rotates following the driving portion 31, and the second locking fitting portion is disengaged from the first locking fitting portion to cancel the locking.

[0067] Specifically, the first locking mating portion includes a first locking position 321 and a second locking position 322, and the second locking mating portion includes a locking protrusion 331. When the locking protrusion 331 is rotated to be matched with the first locking position 321, the sealing seat 4 can be locked in a position where it contacts and seals with the sealing disk; when the locking protrusion 331 is rotated to be matched with the second locking position 322, the sealing seat 4 can be locked in a position where the isolation chamber is fully opened.

[0068] Combination Fig.10As shown, the locking rod 33 is arc-shaped and can be connected to the driving part 31 through a pin shaft. A locking protrusion 331 is set at one end of the locking rod 33, and the other end is close to the handle of the driving part 31. Under normal circumstances, the valve operates normally, the isolation chamber is in a fully open state, and the locking protrusion 331 is matched with the second locking position 322. When online maintenance is required, force is applied to the end of the locking rod 33 close to the handle of the driving part 31 to disengage the locking protrusion 331 from the second locking position 322, and the driving part 31 is rotated to drive the sealing seat 4 to rotate until it contacts and seals with the sealing disk, and the locking protrusion 331 follows the locking rod 33 and the driving part 31 to rotate to the first locking position 321 and is matched with the first locking position 321. During online maintenance, the locking protrusion 331 cooperates with the first locking position 321 to lock the sealing seat 4 in a position in contact with the sealing disk to seal, thereby preventing the sealing seat 4 from loosening. During normal operation of the valve, the locking protrusion 331 cooperates with the second locking position 322 to lock the sealing seat 4 in a position in which the isolation chamber is fully opened, thereby preventing the sealing seat 4 from rotating in a direction close to the valve core 16, thereby preventing the valve core 16 from interfering with the sealing seat 4 when rotating.

[0069] In other embodiments, the first locking fitting portion may also be configured as two locking protrusions, and the second locking fitting portion may be configured as a locking position capable of cooperating with the locking protrusions.

[0070] In addition, the locking disk 32 is further provided with limiting edges 323 , which are located on both sides of the first locking fitting portion. The limiting edges 323 are used to limit the driving portion 31 to prevent the driving portion 31 from rotating too much.

[0071] The eccentric hemispherical valve that can be maintained online in this solution drives the sealing seat 4 to rotate by controlling the driving part 31 outside the valve body 1, and forms an isolation chamber at the maintenance port 15. The main seal 161 can be maintained by disassembling the valve cover 2, making the valve structure simpler and the maintenance of the main seal 161 more convenient. Moreover, the sealing seat 4 is locked and positioned by the second locking fitting part and the first locking fitting part, without the need to set up other locking structures for locking, so that the locking and positioning of the sealing seat 4 is also more convenient.

[0072] The terms "installed", "set", "provided with", and "connected" referred to herein should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0073] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. An eccentric hemispherical valve capable of online maintenance, comprising: A valve body (1), wherein a valve cavity (11) is provided in the valve body (1), and the valve body (1) is also provided with a first opening (13), a second opening (14) and a maintenance port (15) which are in communication with the valve cavity (11), and the maintenance port (15) is externally sealed and connected to a detachable valve cover (2); A valve core (16) is rotatably mounted in the valve cavity (11), comprising a sealing disk and a main sealing member (161) arranged on the sealing disk, wherein the main sealing member (161) is capable of rotating with the valve core (16) and switching positions between the first opening (13) and the maintenance port (15); It is characterized by further comprising: A sealing seat (4) located in the maintenance port (15); A driving assembly connected to the sealing seat (4) and capable of driving the sealing seat (4) to rotate; During online maintenance, the driving assembly drives the sealing seat (4) to rotate until it contacts and seals with the sealing disk. The sealing disk, the sealing seat (4) and the valve cover (2) form an isolation chamber at the maintenance port (15). The main sealing component (161) is located in the isolation chamber. The main sealing component (161) can be inspected by disassembling the valve cover (2).

2. The eccentric hemispherical valve capable of online maintenance according to claim 1, characterized in that: The driving assembly comprises a connecting shaft (34) and a driving part (31); one end of the connecting shaft (34) passes through the valve body (1) and is connected to a side of the sealing seat (4) close to the second opening (14), and the other end is connected to the driving part (31); the driving part (31) drives the connecting shaft (34) to rotate the sealing seat (4).

3. The eccentric hemispherical valve capable of online maintenance according to claim 2, characterized in that: The driving portion (31) is a driving handle, and a first connecting hole (311) is provided on the driving handle for fixed connection with the connecting shaft (34).

4. The eccentric hemispherical valve capable of online maintenance according to claim 2, characterized in that: The driving assembly further comprises a locking plate (32) and a locking rod (33); the locking plate (32) is fixedly arranged relative to the valve body (1); the connecting shaft (34) passes through the locking plate (32) and is connected to the driving part (31); the locking rod (33) is located on the driving part (31) and rotates with the driving part (31); The locking disk (32) is provided with a first locking fitting portion, and the locking rod (33) is provided with a second locking fitting portion. When the locking rod (33) rotates following the driving portion (31), the second locking fitting portion can be selectively connected to the first locking fitting portion to lock and position the sealing seat (4).

5. The eccentric hemispherical valve capable of online maintenance according to claim 4, characterized in that: The first locking fitting portion comprises a first locking position (321) and a second locking position (322); the second locking fitting portion comprises a locking protrusion (331); When the locking protrusion (331) is rotated to be matched with the first locking position (321), the sealing seat (4) can be locked at a position where it contacts and seals with the sealing disk; When the locking protrusion (331) is rotated to be in cooperation with the second locking position (322), the sealing seat (4) can be locked at a position where the isolation chamber is fully opened.

6. The eccentric hemispherical valve capable of online maintenance according to claim 4, characterized in that: The locking disk (32) is also provided with limiting edges (323), the limiting edges (323) are located on both sides of the first locking fitting portion, and the limiting edges (323) are used to limit the driving portion (31).

7. The eccentric hemispherical valve capable of online repair according to any one of claims 1 to 6, characterized in that: The sealing seat (4) is annular, an outer ring side wall of the sealing seat (4) is provided with an outer sealing member (41), and an inner ring side wall of the sealing seat (4) is provided with an inner sealing member (42); during online maintenance, the outer sealing member (41) is sealedly connected to the maintenance port (15), and the inner sealing member (42) is sealedly connected to the sealing disk.

8. The eccentric hemispherical valve capable of online maintenance according to claim 7, characterized in that: The sealing disc of the valve core (16) is also fixedly connected to a pressure disc (162) for fixing the main sealing component (161).

9. The eccentric hemispherical valve capable of online maintenance according to claim 7, characterized in that: An elastic pad (21) is also provided between the valve body (1) and the valve cover (2).

10. The eccentric hemispherical valve capable of online maintenance according to claim 7, characterized in that: A valve seat (12) is arranged near the valve cavity (11) at the first opening (13), and the main sealing member (161) can be in sealing contact with the valve seat (12) to close the valve accordingly.

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