Eccentric semi-ball valve capable of being overhauled without cutting off water
By adopting deformed sealing structure and medium filling technology in the eccentric hemisphere valve, rapid maintenance of seals is achieved in the absence of water stop, solving the problem that traditional valves cannot be inspected when the seal is damaged, improving work efficiency and reducing economic losses.
Patent Information
- Application Number
- CN202411993722.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-03-18
AI Technical Summary
Traditional eccentric hemisphere valves cannot be inspected without stopping water when the sealing ring is damaged, resulting in leakage accidents that cannot be handled in time, resulting in economic losses and waste of resources.
An eccentric half-ball valve with constant water maintenance is designed, and the deformed sealing structure is used to expand and deform it by filling the medium in a fully open state, so as to seal the inspection port and the half-ball valve core, so as to inspect the seal under pressure without stopping water.
This design solves the leakage problem caused by the eccentric hemisphere valve due to the damage to the seal, realizes rapid and simple seal maintenance under constant water supply, improves work efficiency, and reduces economic losses and resource waste.
Smart Images
Figure CN119641939A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of valves, and more particularly to an eccentric hemispherical valve capable of being repaired without stopping water. Background Art
[0002] As a key component in the piping system, valves are mainly used to control the flow of fluids. In many fields such as industry, urban water supply, and energy, valves play an important role in switching, regulating, and distributing fluids. The eccentric hemispherical valve is a specially designed valve with an eccentrically rotating closing member that can achieve efficient and precise control in the fluid system.
[0003] During long-term use, the sealing ring of the traditional eccentric semi-ball valve may cause valve leakage due to wear or damage. The eccentric semi-ball valve is usually used as a shut-off valve or inspection valve in the pipeline system. When a pipeline bursts or other leakage accidents occur, the eccentric semi-ball valve needs to be closed during maintenance to repair and replace the pipeline. If the sealing ring of the eccentric semi-ball valve is damaged and leaks, the eccentric semi-ball valve cannot be closed to repair the pipeline. This requires closing the valve at a farther position of the pipeline, which may usually be several kilometers or even dozens of kilometers. This will cause a large-scale water outage, which will bring great inconvenience to residents and cause relatively serious economic losses and waste of resources. If the sealing ring of the eccentric semi-ball valve is replaced on-site online, the eccentric semi-ball valve in the prior art generally cannot be repaired without stopping the water supply, or the maintenance steps are very cumbersome, which will affect work efficiency, resulting in leakage accidents such as bursts cannot be handled in a timely and effective manner, and still cause certain economic losses and waste of resources. Summary of the invention
[0004] The invention provides an eccentric hemispherical valve for maintenance without water shutoff, which can directly carry out maintenance and replacement of valve core sealing rings under pressure on a water pipeline without water shutoff, so as to solve the problem that valve closing leakage may cause inconvenience in pipeline maintenance.
[0005] In order to achieve the above object, the technical solution provided by the present invention is:
[0006] An eccentric hemispherical valve for non-stop water maintenance comprises a valve body, a hemispherical valve core, a valve cover and a deformable sealing structure, wherein: the valve body has a flow channel for medium circulation, and the valve body is also provided with an inspection port located on the side wall of the flow channel and connected to the flow channel; the hemispherical valve core is connected in the flow channel by a valve shaft rotating radially around the flow channel, the hemispherical valve core can be rotated to switch positions to open or close the flow channel, and the hemispherical valve core is provided with a detachable sealing member; the valve cover is detachably mounted on the valve body and closes the inspection port; the deformable sealing structure is arranged in the inspection port, and when the sealing member needs to be inspected, the hemispherical valve core is rotated until the sealing member is opposite to the inspection port, and the deformable sealing structure can be deformed to seal the gap between the hemispherical valve core and the inner wall of the inspection port.
[0007] When the eccentric hemispherical valve is fully opened, the deformable sealing structure can be filled with medium to expand and deform, so as to seal the inspection port and the hemispherical valve core, so that the valve cover can be opened to inspect, disassemble and replace the seal on the hemispherical valve core without stopping the water supply pipeline under pressure. The steps for inspecting and replacing the seal of the eccentric hemispherical valve are very simple and quick, which solves the pain point that the eccentric hemispherical valve cannot be used or cannot be quickly inspected when used as a cut-off valve and inspection valve in the scene where the valve needs to be closed due to leakage caused by damage to its own seal.
[0008] As an optional technical solution, the valve body includes a mounting seat fixedly connected to the inspection port, and the deformable sealing structure is connected to the mounting seat. The deformable sealing structure is fixed by the mounting seat, so that the deformable sealing structure is easier to disassemble and assemble, and has better structural stability.
[0009] As an optional technical solution, the deformable sealing structure includes an integrally formed deformable rubber ring and a fixed rubber ring, the deformable rubber ring is provided with a medium filling cavity inside, and the fixed rubber ring is provided with an inlet and outlet pipes connected to the medium filling cavity, which can expand and deform by filling the medium into the deformable sealing structure to seal the gap between the hemispherical valve core and the inner wall of the inspection port. The fixed rubber ring has the effect of maintaining the stability of the structure shape and is easy to install and fix, and the deformable rubber ring is mainly used for sealing and can expand and deform.
[0010] As an optional technical solution, the mounting seat includes a first fixed seat ring, the first fixed seat ring is located inside the inspection port, and the deformable sealing structure is detachably connected to the first fixed seat ring through a fixed rubber ring. The first fixed seat ring can maintain the position and structural stability of the deformable sealing structure, and prevent the deformable sealing structure from being offset and causing sealing failure.
[0011] As an optional technical solution, a detachable clamping ring is fixedly connected to the first fixed seat ring, a fixed rubber ring is embedded between the clamping ring and the first fixed seat ring, and a through hole for the inlet and outlet pipes to pass through is provided on the first fixed seat ring. The deformable sealing structure is fixed by the clamping ring on the first fixed seat ring, which makes it more convenient to install or remove the deformable sealing structure.
[0012] As an optional technical solution, the mounting seat also includes a second fixed seat ring, which is fixedly connected to one end of the first fixed seat ring, and the second fixed seat ring is fixedly connected to the outer port of the inspection port, and the valve cover is located at one end of the second fixed seat ring. By setting the second fixed seat ring, the first fixed seat ring can be kept firmly connected and stable on the valve body, and it is convenient to disassemble and install. In addition, the first fixed seat ring and the second fixed seat ring are designed separately, and the first fixed seat ring can be a rust-proof part, such as stainless steel, and the second fixed seat ring can be cast iron and other materials, which can save the use cost.
[0013] As an optional technical solution, the eccentric hemispherical valve for non-stop water maintenance also includes a medium filling pipeline assembly, which includes a first pipeline, one end of which is connected to the inlet and outlet pipes, and the other end of which is connected to the outside, and at least one first switch valve is arranged on the first pipeline. When the seal of the eccentric hemispherical valve needs to be repaired, the first pipeline can be connected to an external medium filling device or a pressurizing device, such as an air compressor, so that air can be filled into the deformable sealing structure to cause it to expand and deform to seal the inspection port and the hemispherical valve core. After sealing, the first switch valve can be closed to maintain pressure; after the maintenance is completed, the first switch valve can be opened again to release pressure. Therefore, the first pipeline makes the maintenance of the eccentric hemispherical valve simpler and faster.
[0014] As an optional technical solution, the medium filling pipeline assembly also includes a second pipeline, one end of which is connected to the first pipeline and is located between at least one first switch valve and the inlet and outlet pipes, the other end of the second pipeline passes through the valve body and is connected to the flow channel, and a second switch valve is provided on the second pipeline. Through the second pipeline assembly, the pipeline water pressure can be directly used to enter the deformable sealing structure to form an expansion seal, without the need for external pressure compensation equipment, and is more convenient to use. When pressure relief is required, it is only necessary to close the second switch valve and open the first switch valve.
[0015] As an optional technical solution, the eccentric hemispherical valve for non-stop water maintenance also includes a pressure relief switch installed on the valve cover, which is used to connect or disconnect the inspection port to the outside. The pressure relief switch is opened when inspecting the seal to discharge excess water in the inspection port, eliminate excess pressure, and make inspection easier.
[0016] As an optional technical solution, the hemispherical valve core has a disc located in the rotation direction of the valve shaft, and the axis of the disc is perpendicular to the center line of the valve shaft and staggered. The disc of the hemispherical valve core of this structure is an eccentric structure, which opens the flow channel more quickly and can reduce the wear on the seal.
[0017] As an optional technical solution, the sealing member includes a sealing ring, a pressure plate is detachably connected to the disc, and the sealing ring is fixed between the pressure plate and the disc. The sealing ring is positioned and installed by the pressure plate, so that the sealing ring can be easily disassembled, assembled and replaced.
[0018] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:
[0019] The eccentric hemispherical valve of the present invention can expand and deform by filling a medium into the deformable sealing structure in a fully opened state, so as to seal the inspection port and the hemispherical valve core, so that the valve cover can be opened to inspect, disassemble and replace the seal on the hemispherical valve core when the water pipeline is under pressure and water is not stopped. The steps for inspecting and replacing the seal of the eccentric hemispherical valve are very simple and quick, which solves the pain point that the eccentric hemispherical valve cannot be used or cannot be quickly inspected when used as a cut-off valve and inspection valve in the scene where the valve needs to be closed due to leakage caused by damage to its own seal. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic axial cross-sectional view of the eccentric hemispherical valve for non-water-stop maintenance in the embodiment during maintenance;
[0021] Figure 2 It is a schematic axial cross-sectional view of the eccentric hemispherical valve for non-water-stopping maintenance in the embodiment when it is not under maintenance;
[0022] Figure 3 is a cross-sectional view of a deformed sealing structure in an embodiment;
[0023] Figure 4 It is a cross-sectional view of the deformable sealing structure in the embodiment installed on the first fixed seat ring;
[0024] Figure 5 Schematic diagram of the structure of the hemispherical valve core in the embodiment;
[0025] Figure 6 A top view of an eccentric hemispherical valve for non-water shut-off maintenance in an embodiment;
[0026] Figure 7 for Figure 6 Section view of the AA plane.
[0027] Description of labels:
[0028] 1-valve body, 11-flow channel, 12-first opening, 13-second opening, 14-inspection port, 15-mounting seat, 151-first fixed seat ring, 152-second fixed seat ring, 153-through hole, 154-clamping ring;
[0029] 2- hemispherical valve core, 21- disc, 22- sealing ring, 23- pressure plate;
[0030] 3-valve cover;
[0031] 4-deformation sealing structure, 41-deformation rubber ring, 42-fixed rubber ring, 43-inlet and outlet pipes, 44-medium filling cavity, 45-corrugated side wall;
[0032] 5-medium filling pipeline assembly, 51-first pipeline, 52-first switch valve, 53-second pipeline, 54-second switch valve;
[0033] 6-Pressure relief switch. DETAILED DESCRIPTION
[0034] 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.
[0035] 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.
[0036] At the same time, 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. Changes or adjustments in their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content. In addition, in addition to being used to indicate orientation or positional relationships, 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.
[0037] 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.
[0038] like Figure 1-7 As shown, an embodiment of the present invention provides an eccentric hemispherical valve for non-stop water maintenance, comprising a valve body 1, a hemispherical valve core 2 and a valve cover 3. The valve body 1 has a flow channel 11 for medium circulation, a first opening 12 is provided at one end of the flow channel 11, and a second opening 13 is provided at the other end, and the first opening 12 and the second opening 13 are used to communicate with an external pipeline.
[0039] The valve body 1 is also provided with an inspection port 14 located on the circumferential side wall of the flow channel 11, the inspection port 14 is connected to the flow channel 11, and the valve cover 3 is detachably mounted on the valve body 1 and closes the inspection port 14. When the eccentric hemispherical valve is mounted on the pipeline, the inspection port 14 is generally facing upward, so that the valve cover 3 can be opened conveniently, and the internal parts can be disassembled and inspected from the inspection port 14.
[0040] The hemispherical valve core 2 is connected in the flow channel 11 by the valve shaft rotating radially around the flow channel 11. The valve shaft passes through the valve body 1 and can be connected to an external actuator for driving. The actuator drives the valve shaft and the hemispherical valve core 2 to rotate. Figure 1 As shown, the inspection port 14 faces upward and is located on the rotation path of the hemispherical valve core 2. The hemispherical valve core 2 can rotate and switch positions between the first opening 12, the second opening 13 and the inspection port 14. The hemispherical valve core 2 can rotate and switch positions to open or close the flow channel 11. The hemispherical valve core 2 is provided with a detachable sealing member. When the hemispherical valve core 2 fully opens the flow channel 11, the sealing member is directly opposite to the inspection port 14.
[0041] like Figure 1 , 2 As shown in Figure 5, the hemispherical valve core 2 has a disc 21 located in the rotation direction of the valve shaft. The sealing member of the hemispherical valve core 2 is a sealing ring 22. A pressure plate 23 is detachably connected to the disc 21. The sealing ring 22 is clamped and fixed between the pressure plate 23 and the disc 21. The sealing ring 22 is positioned and installed by the pressure plate 23, which facilitates the disassembly, assembly and replacement of the sealing ring 22. The axis of the disc 21 is perpendicular to the center line of the valve shaft and staggered, refer to Figure 5 The x-axis and y-axis in the figure, the y-axis is the axis of the disk 21, the x-axis is an axis passing through the center of the valve shaft and perpendicular to the center line of the valve shaft, the x-axis is parallel to the y-axis and staggered, and with the x-axis as a reference, it can be seen that the axis of the disk 21 is perpendicular to the center line of the valve shaft and staggered. When the hemispherical valve core 2 rotates, as shown in FIG. Figure 5 The turning radius of the lower edge of the disc 21 is smaller, and the flow channel 11 can be opened by turning a smaller angle when opening the valve, and the valve opening will be faster. Although this eccentric structure design opens the valve faster and causes less wear on the sealing ring 22, the turning radius of the upper edge of the disc 21 is larger, and the inspection port 14 needs a larger diameter to avoid position interference with the rotation of the hemispherical valve core 2. Therefore, the gap between the inspection port 14 and the disc 21 will be larger, and the gap between the inspection port 14 and the disc 21 cannot be sealed by installing a conventional sealing structure on the inspection port 14, so it is difficult to replace the sealing ring 22 during maintenance under pressure without stopping the water.
[0042] To this end, in order to solve the technical problem that the gap between the inspection port 14 and the disc 21 is too large to be sealed, the eccentric hemispherical valve is further provided with a deformable sealing structure 4 in the inspection port 14. The deformable sealing structure 4 is arranged in the inspection port 14. When the seal needs to be inspected, the hemispherical valve core 2 completely opens the flow channel 11, that is, Figure 1 and Figure 2The position of the hemispherical valve core 2 is shown in the figure. At this time, the axial direction of the sealing ring 22 and the disc 21 is directly opposite to the inspection port 14. The deformable sealing structure 4 can be filled with a medium to cause it to expand and deform to seal the gap between the hemispherical valve core 2 and the inner wall of the inspection port 14. The medium can be a liquid or a gas or other flowing particulate matter. When the deformable sealing structure 4 seals the gap between the disc 21 of the hemispherical valve core 2 and the inner wall of the inspection port 14, the inspection port 14 is now isolated from the flow channel 11, and the sealing ring 22 is located in the inspection port 14. The flow channel 11 can pass water normally. The sealing ring 22 can be opened to inspect, disassemble and replace. Therefore, the steps for inspecting and replacing the seal of the eccentric hemispherical valve are very simple and quick, which solves the pain point that the eccentric hemispherical valve cannot be used or cannot be quickly inspected when used as a cut-off valve and an inspection valve in the scene where the valve needs to be closed due to leakage caused by damage to its own seal.
[0043] In this embodiment, in order to ensure the structural stability of the deformable sealing structure 4, a mounting seat 15 fixedly connected to the inspection port 14 is provided on the valve body 1. The mounting seat 15 is a part of the valve body 1. The deformable sealing structure 4 is connected to the mounting seat 15. The deformable sealing structure 4 is mounted and fixed by the mounting seat 15, so that the disassembly and assembly of the deformable sealing structure 4 is also simpler and more convenient. Figure 3 The deformable sealing structure 4 of this embodiment includes an integrally formed deformable rubber ring 41 and a fixed rubber ring 42. A medium filling cavity 44 is provided inside the deformable rubber ring 41, and an inlet and outlet pipe 43 connected to the medium filling cavity 44 is provided on the fixed rubber ring 42. The wall thickness of the fixed rubber ring 42 is greater than that of the deformable rubber ring 41. Both the deformable rubber ring 41 and the fixed rubber ring 42 can be made of rubber material. Since the fixed rubber ring 42 is thicker, the fixed rubber ring 42 has the effect of maintaining the stability of the structure shape and is easy to install and fix. The deformable rubber ring 41 is mainly used for sealing and can expand and deform. In addition, in order to ensure the shape stability of the deformable rubber ring 41 during expansion and contraction, the deformable rubber ring 41 is also provided with a corrugated side wall 45 along its circumference.
[0044] In some optional embodiments, such as Figure 1 and 2As shown, the mounting seat 15 includes a first fixed seat ring 151, the first fixed seat ring 151 is located inside the inspection port 14, and the deformable sealing structure 4 is detachably connected to the first fixed seat ring 151 through a fixed rubber ring 42. More specifically, a detachable snap ring 154 is fixedly connected to the first fixed seat ring 151, and the snap ring 154 can be connected to the first fixed seat ring 151 by bolts. The fixed rubber ring 42 is embedded between the snap ring 154 and the first fixed seat ring 151, and a through hole 153 is provided on the first fixed seat ring 151 for the inlet and outlet pipes 43 to pass through. The position and structure of the deformable sealing structure 4 can be maintained stable by the first fixed seat ring 151, and the position displacement of the deformable sealing structure 4 and the sealing failure can be prevented. The deformable sealing structure 4 is fixed by the snap ring 154 on the first fixed seat ring 151, which makes it more convenient to install or disassemble the deformable sealing structure 4.
[0045] In some optional embodiments, the mounting seat 15 further includes a second fixed seat ring 152, which is fixedly connected to one end of the first fixed seat ring 151, and the second fixed seat ring 152 is fixedly connected to the outer port of the inspection port 14, and the valve cover 3 is located at one end of the second fixed seat ring 152. By setting the second fixed seat ring 152, the first fixed seat ring 151 can be kept connected to the valve body 1 tightly and stably, and it is convenient to disassemble and install. In addition, the first fixed seat ring 151 and the second fixed seat ring 152 are designed separately, and the first fixed seat ring 151 can be a rust-proof part, such as stainless steel, and the second fixed seat ring 152 can be cast iron or other materials, which can save the use cost.
[0046] In this embodiment, although the deformable sealing structure 4 can be filled with medium to expand and deform to achieve a sealing effect, the medium needs to be added from the outside, and after the sealing ring 22 is repaired and replaced, the deformable sealing structure 4 needs to be unsealed, so that the deformable sealing structure 4 will not hinder or interfere with the rotation of the hemispherical valve core 2. For this reason, the eccentric hemispherical valve for maintenance without stopping water is also provided with a medium filling pipeline assembly 5, through which the medium is filled into the deformable sealing structure 4.
[0047] This embodiment provides two specific implementations of the medium filling pipeline assembly 5. In the first implementation, the medium filling pipeline assembly 5 includes a first pipeline 51, one end of the first pipeline 51 is connected to the inlet and outlet pipes 43 of the deformable sealing structure 4, and the other end of the first pipeline 51 is connected to the outside. At least one first switch valve 52 is provided on the first pipeline 51. In this way, when the seal needs to be inspected, the eccentric semi-ball valve can be connected to an external medium filling device or a pressurizing device, such as an air compressor, through the first pipeline 51, so that air can be filled into the deformable sealing structure 4 to cause it to expand and deform to seal the inspection port 14 and the semi-ball valve core 2. After sealing, the first switch valve 52 can be closed to maintain pressure; after the inspection is completed, the first switch valve 52 can be opened again to release pressure. Therefore, the first pipeline 51 makes the inspection of the eccentric semi-ball valve simpler and faster.
[0048] In a second embodiment, if Figure 7 As shown, the medium filling pipeline assembly 5 also includes a second pipeline 53, one end of which is connected to the first pipeline 51 and is located between at least one first switch valve 52 and the inlet and outlet pipes 43. The other end of the second pipeline 53 passes through the valve body 1 and is connected to the flow channel 11. A second switch valve 54 is provided on the second pipeline 53. Through the second pipeline 53 assembly, the pipeline water pressure can be directly used to enter the inside of the deformable sealing structure 4 to form an expansion seal, without the need for external pressure compensation equipment, which is more convenient to use. After the inspection is completed, when the pressure needs to be released, the water in the deformable sealing structure 4 can be discharged by closing the second switch valve 54 and opening the first switch valve 52.
[0049] In some embodiments, Figure 6 As shown, a pressure relief switch 6 is installed on the valve cover 3 of the eccentric hemispherical valve. The pressure relief switch 6 is used to selectively connect or disconnect the inspection port 14 to the outside. The pressure relief switch 6 is specifically a small ball valve. The pressure relief switch 6 is opened when inspecting the seal to discharge excess water in the inspection port 14, eliminate excess pressure, and make inspection easier.
[0050] 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.
[0051] 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. Eccentric hemispherical valve for non-stop water maintenance, characterized by: include: A valve body (1) having a flow channel (11) for medium to flow through, and the valve body (1) is also provided with an inspection port (14) located on a side wall of the flow channel (11) and in communication with the flow channel (11); A hemispherical valve core (2) is connected to the flow channel (11) by radially rotating the valve shaft around the flow channel (11), and the hemispherical valve core (2) is provided with a detachable sealing member; A valve cover (3) is detachably mounted on the valve body (1) and closes the inspection port (14); The deformable sealing structure (4) is arranged in the inspection port (14). When the sealing member needs to be inspected, the hemispherical valve core (2) is rotated to a position where the sealing member is directly opposite to the inspection port (14). The deformable sealing structure (4) can be deformed to seal the gap between the hemispherical valve core (2) and the inner wall of the inspection port (14).
2. The eccentric hemispherical valve for non-stop water maintenance according to claim 1 is characterized in that: The valve body (1) comprises a mounting seat (15) fixedly connected to the inspection port (14), and the deformable sealing structure (4) is fixedly connected to the mounting seat (15).
3. The eccentric hemispherical valve for non-stop water maintenance according to claim 2 is characterized in that: The deformable sealing structure (4) comprises an integrally formed deformable rubber ring (41) and a fixed rubber ring (42); a medium filling cavity (44) is provided inside the deformable rubber ring (41); and an inlet and outlet pipe (43) connected to the medium filling cavity (44) is provided on the fixed rubber ring (42). The deformable sealing structure (4) can be expanded and deformed by filling the medium into the interior of the deformable sealing structure (4) to seal the gap between the hemispherical valve core (2) and the inner wall of the inspection port (14).
4. The eccentric hemispherical valve for non-stop water maintenance according to claim 3 is characterized in that: The mounting seat (15) comprises a first fixed seat ring (151), the first fixed seat ring (151) is located inside the inspection opening (14), and the deformable sealing structure (4) is detachably connected to the first fixed seat ring (151) via the fixed rubber ring (42); A detachable clamping ring (154) is fixedly connected to the first fixed seat ring (151), the fixed rubber ring (42) is embedded between the clamping ring (154) and the first fixed seat ring (151), and the first fixed seat ring (151) is provided with a through hole (153) for the inlet and outlet pipes (43) to pass through.
5. The eccentric hemispherical valve for non-stop water maintenance according to claim 2 is characterized in that: The mounting seat (15) further comprises a second fixed seat ring (152), wherein the second fixed seat ring (152) is fixedly connected to one end of the first fixed seat ring (151), and the second fixed seat ring (152) is fixedly connected to an outer port of the inspection port (14), and the valve cover (3) is located at one end of the second fixed seat ring (152).
6. The eccentric hemispherical valve for non-stop water maintenance according to claim 3 is characterized by: The invention also comprises a medium filling pipeline assembly (5), wherein the medium filling pipeline assembly (5) comprises a first pipeline (51), one end of the first pipeline (51) is connected to the inlet and outlet pipes (43), the other end of the first pipeline (51) is connected to the outside, and at least one first switch valve (52) is provided on the first pipeline (51).
7. The eccentric hemispherical valve for non-stop water maintenance according to claim 6, characterized in that: The medium filling pipeline assembly (5) further comprises a second pipeline (53), one end of which is connected to the first pipeline (51) in bypass fashion and is located between at least one of the first switch valves (52) and the inlet and outlet pipes (43), the other end of which passes through the valve body (1) and is in communication with the flow channel (11), and a second switch valve (54) is provided on the second pipeline (53).
8. The eccentric hemispherical valve for non-stop water maintenance according to claim 1 is characterized in that: It also includes a pressure relief switch (6) installed on the valve cover (3), and the pressure relief switch (6) is used to connect or disconnect the inspection port (14) to the outside.
9. The eccentric hemispherical valve for non-stop water maintenance according to any one of claims 1 to 8, characterized in that: The hemispherical valve core (2) has a disc (21) located in the rotation direction of the valve shaft, and the axis of the disc (21) is perpendicular to the center line of the valve shaft and staggered.
10. The eccentric hemispherical valve for non-stop water maintenance according to claim 9, characterized in that: The sealing member comprises a sealing ring (22), a pressure plate (23) is detachably connected to the disc (21), and the sealing ring (22) is fixed between the pressure plate (23) and the disc (21).