Eccentric semi-ball valve capable of being overhauled without cutting off water
By introducing a deformable sealing structure into the eccentric hemispherical valve, the gap between the inspection port and the hemispherical valve core is sealed by the expansion and deformation of the medium, thus realizing the maintenance of the sealing element without stopping water supply. This solves the leakage and water outage problems caused by the damage of the sealing ring in the traditional eccentric hemispherical valve, and improves work efficiency and economy.
Patent Information
- Application Number
- CN202423314196.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Traditional eccentric ball valves cannot be repaired without interrupting water supply when the sealing ring is damaged, leading to leaks and water outages, affecting work efficiency and causing economic losses.
Design an eccentric hemispherical valve for non-stop water supply maintenance. By filling the deformable sealing structure with medium to expand and deform it, the gap between the maintenance port and the hemispherical valve core is sealed, thus achieving a non-stop water supply seal for pressurized maintenance.
It enables simple and quick replacement of seals in pressurized water pipelines, solving leakage problems caused by seal damage and avoiding large-scale water outages and resource waste.
Smart Images
Figure CN223725485U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to valve technical field more specifically, relate to a kind of eccentric half ball valve of not stopping water overhauling. BACKGROUND
[0002] Valve is the key component in pipeline system, mainly used for controlling the flow of fluid. In industry, urban water supply, energy and other fields, valve plays an important role in switching, regulating and distributing fluid. Eccentric half ball valve is a specially designed valve, which has an eccentric rotating closing member and can achieve efficient and accurate control in fluid system.
[0003] In the long-term use of traditional eccentric half ball valve, the sealing ring may be damaged due to wear and tear, causing valve leakage. Eccentric half ball valve is usually used as a shut-off valve or maintenance valve in pipeline system. When pipeline leakage accident such as pipe burst occurs, the eccentric half ball valve needs to be closed for maintenance and replacement of the pipeline. If the sealing ring of the eccentric half ball valve is damaged and leaks, the eccentric half ball valve cannot be closed for maintenance of the pipeline, which requires closing the valve at a further position on the pipeline, which may be several kilometers or even tens of kilometers away. This will cause large-scale water stoppage, causing great inconvenience to residents and causing serious economic loss and resource waste. If the sealing ring of the eccentric half ball valve is replaced on site, the existing eccentric half ball valve cannot be maintained without stopping water, or the maintenance steps are very complicated, which will affect the work efficiency, cause the leakage accident such as pipe burst cannot be handled in time and effectively, and still cause certain economic loss and resource waste. SUMMARY
[0004] The utility model provides a kind of eccentric half ball valve of not stopping water overhauling, can directly be carried out on water pipeline with pressure not stopping water maintenance replacement valve core sealing ring, to solve the problem of inconvenient pipeline maintenance caused by valve leakage.
[0005] To achieve the above purpose, the utility model provides the technical scheme as follows:
[0006] An eccentric half ball valve for not stopping water overhauling, comprising a valve body, a half ball valve core, a valve cover and a deformation sealing structure, wherein: the valve body has a flow passage for medium flow, and the valve body further has a maintenance opening located on the side wall of the flow passage and communicating with the flow passage; the half ball valve core is connected in the flow passage by a valve shaft rotating radially around the flow passage, and the half ball valve core can rotate to switch position to open or shut off the flow passage, and the half ball valve core is provided with a detachable sealing member; the valve cover is detachably installed on the valve body and closes the maintenance opening; the deformation sealing structure is arranged in the maintenance opening, and when the sealing member needs to be maintained, the half ball valve core is rotated to the position opposite to the sealing member and the maintenance opening, and the deformation sealing structure can be deformed to seal the gap between the half ball valve core and the inner wall of the maintenance opening.
[0007] The eccentric half-ball valve can seal the gap between the half-ball valve core and the inner wall of the access port by filling the medium into the deformed sealing structure to make it expand and deform, so that the sealing element on the half-ball valve core can be maintained, repaired, disassembled and replaced under the condition that the water pipeline is under pressure and water supply is not stopped. The steps of the eccentric half-ball valve in maintaining, repairing, disassembling and replacing the sealing element are very simple and fast, and the pain point problem that the eccentric half-ball valve as a blocking valve and a maintenance valve cannot be used or cannot be quickly maintained due to leakage when the sealing element is damaged in the scene where the valve needs to be closed is solved.
[0008] As an optional technical solution, the valve body includes a mounting seat fixedly connected to the access port, and the deformed sealing structure is connected to the mounting seat. The deformed sealing structure is installed and fixed by the mounting seat, making it easier to disassemble and assemble, and the structure is more stable.
[0009] As an optional technical solution, the deformed sealing structure includes an integrally formed deformed rubber ring and a fixed rubber ring, the deformed rubber ring has a medium filling cavity inside, and the fixed rubber ring has an inlet and outlet pipe communicating with the medium filling cavity. The deformed sealing structure can be expanded and deformed by filling the medium into the deformed sealing structure to seal the gap between the half-ball valve core and the inner wall of the access port. The fixed rubber ring has the effect of keeping the structure stable, is easy to install and fix, and the deformed rubber ring is mainly used for sealing and can be expanded and deformed.
[0010] As an optional technical solution, the mounting seat includes a first fixed seat ring, the first fixed seat ring is located inside the access port, and the deformed sealing structure is detachably connected to the first fixed seat ring through the fixed rubber ring. The first fixed seat ring can keep the position and structure of the deformed sealing structure stable, preventing the deformed sealing structure from being offset and causing sealing failure.
[0011] As an optional technical solution, the first fixed seat ring is fixedly connected with a detachable snap ring, the fixed rubber ring is embedded between the snap ring and the first fixed seat ring, and the first fixed seat ring is provided with a through hole for the inlet and outlet pipe to pass through. The deformed sealing structure is fixed by the snap ring on the first fixed seat ring, making it easier to install or disassemble the deformed sealing structure.
[0012] As an optional technical solution, the mounting seat further includes a second fixed seat ring, the second fixed seat ring 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 access port, and the valve cover is located at one end of the second fixed seat ring. The second fixed seat ring can keep the first fixed seat ring connected, fastened and stable on the valve body, making it easy to disassemble and install. In addition, the first fixed seat ring and the second fixed seat ring are designed separately, 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 or other materials, which can save the use cost.
[0013] As an optional technical solution, the eccentric half-ball valve for non-stop water maintenance further comprises a medium filling pipeline assembly, the medium filling pipeline assembly comprises a first pipeline, one end of the first pipeline is communicated with the inlet and outlet pipeline, the other end of the first pipeline is communicated with the outside, and at least one first switch valve is arranged on the first pipeline. When the sealing element needs to be maintained, the first pipeline can be connected with the external medium filling device or the pressure device, such as an air compressor, so that air can be filled into the deformed sealing structure to make it expand and deform to seal between the maintenance opening and the half-ball valve core, and 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 eccentric half-ball valve maintenance is more simple and fast through the first pipeline.
[0014] As an optional technical solution, the medium filling pipeline assembly further comprises a second pipeline, one end of the second pipeline is connected to the first pipeline in parallel, and is located between the at least one first switch valve and the inlet and outlet pipeline, the other end of the second pipeline is communicated with the flow channel through the valve body, and a second switch valve is arranged on the second pipeline. Through the second pipeline assembly, the pipeline water pressure can be directly used to form an expansion seal in the deformed sealing structure, without the need for external pressure supplementing equipment, and the use is more convenient, and when pressure relief is needed, the second switch valve can be closed and the first switch valve can be opened.
[0015] As an optional technical solution, the eccentric half-ball valve for non-stop water maintenance further comprises a pressure relief switch mounted on the valve cover, and the pressure relief switch is used for conducting or shutting off the maintenance opening with the outside. The pressure relief switch is used for opening when the sealing element is maintained, and excess water in the maintenance opening is discharged to eliminate excess pressure, and the maintenance is easier.
[0016] As an optional technical solution, the half-ball valve core has a disc located in the rotation direction of the valve shaft, and the axis of the disc is perpendicular to and staggered from the center line of the valve shaft. The disc of the half-ball valve core of this structure is eccentric, which is faster when opening the flow channel, and can reduce the wear of the sealing element.
[0017] As an optional technical solution, the sealing element comprises a sealing ring, a pressing plate is detachably connected to the disc, and the sealing ring is fixed between the pressing plate and the disc. The sealing ring is positioned and installed by the pressing plate, and the sealing ring is convenient to disassemble and replace.
[0018] Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:
[0019] The eccentric half-ball valve can produce expansion deformation by filling medium into the deformation sealing structure in a completely open state, so as to seal between the maintenance opening and the half-ball valve core, so that the sealing element on the half-ball valve core can be maintained, disassembled and replaced under the condition that the water pipeline is under pressure and water is not stopped. The steps of the eccentric half-ball valve in the maintenance and replacement of the sealing element are very simple and fast, and the pain point problem that the eccentric half-ball valve as a block valve and a maintenance valve cannot be used or cannot be quickly maintained due to leakage when the sealing element is damaged in the scene where the valve needs to be closed is solved. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is an axial sectional view schematic diagram of the eccentric half-ball valve for water maintenance without stopping in the embodiment when being maintained;
[0021] Figure 2 It is an axial sectional view schematic diagram of the eccentric half-ball valve for water maintenance without stopping in the embodiment when not being maintained;
[0022] Figure 3 It is a sectional view of the deformation sealing structure in the embodiment;
[0023] Figure 4 It is a sectional view of the deformation sealing structure installed on the first fixed seat ring in the embodiment;
[0024] Figure 5 It is a structure schematic diagram of the half-ball valve core in the embodiment;
[0025] Figure 6 It is a top view of the eccentric half-ball valve for water maintenance without stopping in the embodiment;
[0026] Figure 7 It is Figure 6 a sectional view of A-A surface in the embodiment.
[0027] REFERENCE SIGNS:
[0028] 1-valve body, 11-flow channel, 12-first opening, 13-second opening, 14-maintenance opening, 15-mounting seat, 151-first fixed seat ring, 152-second fixed seat ring, 153-through hole, 154-clamp ring;
[0029] 2-half-ball valve core, 21-disc, 22-sealing ring, 23-pressing disc;
[0030] 3-valve cover;
[0031] 4-deformation sealing structure, 41-deformation rubber ring, 42-fixed rubber ring, 43-inlet and outlet pipe, 44-medium filling cavity, 45-corrugated side wall;
[0032] 5 - medium filling pipe assembly, 51 - first pipe, 52 - first on-off valve, 53 - second pipe, 54 - second on-off valve;
[0033] 6 - pressure relief switch. DETAILED DESCRIPTION
[0034] For further understanding of the present application, the present application will be described in detail with reference to the accompanying drawings and examples.
[0035] The structure, proportion, size, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, for understanding and reading by those skilled in the art, and are not used to limit the implementation conditions of the present application, so they do not have technical substantive significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.
[0036] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like referred to in the present specification are only for the convenience of clear description, and are not used to limit the implementation range, the change or adjustment of the relative relationship without substantial change of technical content is also considered as the implementation scope of the present application. Moreover, in addition to being used to indicate the orientation or position relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present 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 do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so as to describe the embodiments of the present application described herein.
[0038] As Figures 1-7 shown, the present application provides an eccentric half-ball valve for maintenance without water stop, which comprises a valve body 1, a half-ball valve core 2 and a valve cover 3. Wherein, the valve body 1 has a flow channel 11 for medium flow, one end of the flow channel 11 is provided with a first opening 12, and the other end is provided with a second opening 13, the first opening 12 and the second opening 13 are used for communicating with the external pipeline.
[0039] The valve body 1 is further provided with an access hole 14 on the circumferential side wall of the flow passage 11, the access hole 14 is communicated with the flow passage 11, and the valve cover 3 is detachably mounted on the valve body 1 and closes the access hole 14. When the eccentric hemispherical valve is installed on the pipeline, the access hole 14 is generally upward, so that the valve cover 3 can be conveniently opened, and the internal parts can be disassembled and repaired through the access hole 14.
[0040] The hemispherical valve core 2 is connected in the flow passage 11 by rotating the valve shaft radially around the flow passage 11, the valve shaft can be connected with the external actuator to drive through the valve body 1, and the valve shaft and the hemispherical valve core 2 are driven to rotate by the actuator. Figure 1 As shown in the drawings, the access hole 14 is upward, the access hole 14 is located on the rotation path of the hemispherical valve core 2, and the hemispherical valve core 2 can rotate to switch positions among the first opening 12, the second opening 13 and the access hole 14. The hemispherical valve core 2 can rotate to switch positions to open or shut off the flow passage 11, the hemispherical valve core 2 is provided with a detachable sealing element, and when the hemispherical valve core 2 completely opens the flow passage 11, the sealing element is opposite to the position of the access hole 14.
[0041] As shown in the drawings, Figure 1 , 2 and 5, the hemispherical valve core 2 has a disc 21 in the rotation direction of the valve shaft, the sealing element of the hemispherical valve core 2 is a sealing ring 22, the disc 21 is detachably connected with a pressure plate 23, 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, and the sealing ring 22 is convenient to disassemble and replace. The center line of the disc 21 is perpendicular to and staggered from the center line of the valve shaft, referring to the x-axis and the y-axis in Figure 5 , the y-axis is the center line of the disc 21, and the x-axis is an axis line passing through the center of the valve shaft and perpendicular to the center line of the valve shaft, the x-axis and the y-axis are parallel and staggered, and referring to the x-axis, the center line of the disc 21 is perpendicular to and staggered from the center line of the valve shaft. Figure 5 When the hemispherical valve core 2 rotates, the rotation radius of the lower edge of the disc 21 is smaller, the flow passage 11 can be opened by rotating a smaller angle, the valve opening is faster, the wear of the sealing ring 22 is smaller, but the rotation radius of the upper edge of the disc 21 is larger, the access hole 14 needs a larger diameter to avoid position interference of the rotation of the hemispherical valve core 2, therefore, the gap between the access hole 14 and the disc 21 is larger, the gap between the access hole 14 and the disc 21 cannot be sealed by installing a conventional sealing structure on the access hole 14, and it is difficult to realize the maintenance and replacement of the sealing ring 22 under pressure without stopping water.
[0042] To this end, in view of the technical problem that it is difficult to seal the gap between the manhole 14 and the disc 21, the eccentric hemisphere valve is further provided with a deformed sealing structure 4 in the manhole 14. When the sealing element needs to be overhauled, the flow passage 11 is completely opened by the hemisphere valve core 2, i.e. the position of the hemisphere valve core 2 as shown in Figure 1 and Figure 2 , at this time, the axial direction of the sealing ring 22 and the disc 21 is opposite to the manhole 14, and the gap between the disc 21 of the hemisphere valve core 2 and the inner wall of the manhole 14 can be sealed by filling the medium inside the deformed sealing structure 4 to make it expand and deform. The medium can be a liquid or a gas or other flowable particles. After the deformed sealing structure 4 seals the gap between the disc 21 of the hemisphere valve core 2 and the inner wall of the manhole 14, at this time the manhole 14 is isolated from the flow passage 11, and the sealing ring 22 is located in the manhole 14, and the flow passage 11 can be normally watered, and the valve cover 3 can be opened to overhaul and replace the sealing ring 22. Therefore, the steps of overhauling and replacing the sealing element of the eccentric hemisphere valve are very simple and fast, and the problem of leakage when the eccentric hemisphere valve is used as a blocking valve and an overhauling valve in the scene where the valve needs to be closed due to damage of its own sealing element is solved.
[0043] In this embodiment, in order to ensure that the deformed sealing structure 4 has good structural stability, a mounting seat 15 is arranged on the valve body 1 and fixedly connected at the manhole 14. The mounting seat 15 belongs to a part of the valve body 1, the deformed sealing structure 4 is connected to the mounting seat 15, and the deformed sealing structure 4 is installed and fixed through the mounting seat 15, so that the deformed sealing structure 4 is also more simple and convenient to disassemble and assemble. Referring to Figure 3 , the deformed sealing structure 4 of the embodiment includes an integrally formed deformed rubber ring 41 and a fixed rubber ring 42. The deformed rubber ring 41 is internally provided with a medium filling cavity 44, and the fixed rubber ring 42 is provided with an inlet and outlet pipe 43 in communication with the medium filling cavity 44. The wall thickness of the fixed rubber ring 42 is greater than that of the deformed rubber ring 41, and both the deformed rubber ring 41 and the fixed rubber ring 42 can be made of rubber material. Since the fixed rubber ring 42 has a greater thickness, the fixed rubber ring 42 has the effect of keeping the structural shape stable, and is convenient to install and fix, while the deformed rubber ring 41 is mainly used for sealing and can expand and deform. In addition, in order to ensure the shape stability of the deformed rubber ring 41 during expansion and contraction, the deformed rubber ring 41 is further provided with a corrugated side wall 45 along the circumferential direction thereof.
[0044] In some optional embodiments, as shown in Figure 1 and 2As shown, the mounting seat 15 comprises a first fixed seat ring 151 located inside the manhole 14, and the deformed sealing structure 4 is detachably connected with the first fixed seat ring 151 through the fixed rubber ring 42. More specifically, the first fixed seat ring 151 is fixedly connected with a detachable snap ring 154 which can be connected with the first fixed seat ring 151 through a bolt, and the fixed rubber ring 42 is embedded between the snap ring 154 and the first fixed seat ring 151. The first fixed seat ring 151 is provided with a through hole 153 for the inlet and outlet pipe 43 to pass through. The first fixed seat ring 151 can keep the position and structure of the deformed sealing structure 4 stable, and prevent the deformed sealing structure 4 from being out of position and losing sealing effect. The deformed 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 deformed sealing structure 4.
[0045] In some optional embodiments, the mounting seat 15 further comprises a second fixed seat ring 152 fixedly connected at one end of the first fixed seat ring 151, and the second fixed seat ring 152 is fixedly connected with the outer port of the manhole 14, and the valve cover 3 is located at one end of the second fixed seat ring 152. The second fixed seat ring 152 can keep the first fixed seat ring 151 connected and fastened on the valve body 1 stable, 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, 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 deformed sealing structure 4 can fill the medium to swell and deform to achieve sealing effect, the medium needs to be added from the outside, and after the sealing ring 22 is replaced, the deformed sealing structure 4 needs to be cancelled to seal, so that the deformed sealing structure 4 does not hinder and interfere with the rotation of the eccentric half-ball valve core 2. Therefore, the eccentric half-ball valve for non-stop water maintenance is also provided with a medium filling pipeline assembly 5 for filling the medium into the deformed sealing structure 4.
[0047] The embodiment provides two specific implementations of the medium filling pipeline assembly 5. In the first implementation, the medium filling pipeline assembly 5 comprises a first pipeline 51, one end of the first pipeline 51 is communicated with the inlet and outlet pipeline 43 of the deformation sealing structure 4, the other end of the first pipeline 51 is communicated with the outside, and at least one first switch valve 52 is arranged on the first pipeline 51. In this way, when the sealing element needs to be repaired, the eccentric half-ball valve can be connected with the external medium filling device or the pressing device, such as an air compressor, through the first pipeline 51, so that the air can be filled into the deformation sealing structure 4 to make the deformation sealing structure 4 expand and deform to seal between the repair opening 14 and the half-ball valve core 2, and after sealing, the first switch valve 52 can be closed to maintain pressure; after the repair is completed, the first switch valve 52 can be opened again to release pressure. Therefore, the eccentric half-ball valve repair is more simple and fast through the first pipeline 51.
[0048] In the second implementation, as shown in the figure, Figure 7 the medium filling pipeline assembly 5 further comprises a second pipeline 53, one end of the second pipeline 53 is connected to the first pipeline 51 and located between the at least one first switch valve 52 and the inlet and outlet pipeline 43, the other end of the second pipeline 53 is communicated with the flow channel 11 through the valve body 1, and a second switch valve 54 is arranged on the second pipeline 53. Through the second pipeline 53 assembly, the water pressure in the pipeline can be directly used to enter the inside of the deformation sealing structure 4 to form an expansion seal, without the aid of external pressure supplementing equipment, and the use is more convenient. When the repair is completed and pressure needs to be released, the second switch valve 54 can be closed and the first switch valve 52 can be opened to discharge the water in the deformation sealing structure 4.
[0049] In some embodiments, as shown in the figure, Figure 6 the valve cover 3 of the eccentric half-ball valve is provided with a pressure relief switch 6, the pressure relief switch 6 is used for selectively conducting or shutting off the repair opening 14 and the outside, and the pressure relief switch 6 is specifically a small ball valve. The pressure relief switch 6 is used for opening when the sealing element is repaired, discharging the excess water in the repair opening 14, eliminating the excess pressure, and being more easy to repair.
[0050] The terms "mount", "arrange", "provide with", and "connect" referred to herein should be understood in a broad sense. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0051] The above describes the utility model and its embodiments in a schematic manner, and the description is not restrictive, and the drawings only show one of the embodiments of the utility model, and the actual structure is not limited thereto. Therefore, if a person of ordinary skill in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structural modes and embodiments are designed without creativity, and all should belong to the protection scope of the utility model.
Claims
1. An eccentric hemispherical valve that can be maintained without interrupting water supply, characterized in that: include: The valve body (1) has a flow channel (11) for the flow of medium. The valve body (1) is also provided with an inspection port (14) located on the side wall of the flow channel (11) and communicating with the flow channel (11). A hemispherical valve core (2) is radially connected to the flow channel (11) via a valve shaft, and the hemispherical valve core (2) is provided with a removable seal. The valve cover (3) is detachably mounted on the valve body (1) and closes the access port (14). The deformable sealing structure (4) is provided inside the inspection port (14). When the seal needs to be repaired, the hemispherical valve core (2) is rotated so that the seal and the inspection port (14) are directly opposite each other. The deformable sealing structure (4) can deform 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 supply maintenance according to claim 1, characterized in that: The valve body (1) includes a mounting base (15) fixedly connected to the inspection port (14), and the deformable sealing structure (4) is fixedly connected to the mounting base (15).
3. The eccentric hemispherical valve for maintenance without interrupting water supply according to claim 2, characterized in that: The deformable sealing structure (4) includes an integrally formed deformable rubber ring (41) and a fixed rubber ring (42). The deformable rubber ring (41) has a medium filling cavity (44) inside. The fixed rubber ring (42) has an inlet and outlet pipe (43) communicating with the medium filling cavity (44). It can expand and deform by filling the deformable sealing structure (4) with medium 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 supply maintenance according to claim 3, characterized in that: The mounting base (15) includes a first fixed seat ring (151), which is located inside the inspection port (14). The deformable sealing structure (4) is detachably connected to the first fixed seat ring (151) through the fixed rubber ring (42). A detachable retaining ring (154) is fixedly connected to the first fixed seat ring (151), and the fixed rubber ring (42) is embedded between the retaining ring (154) and the first fixed seat ring (151). The first fixed seat ring (151) is provided with a through hole (153) for the inlet and outlet pipe (43) to pass through.
5. The eccentric hemispherical valve for non-stop water supply maintenance according to claim 4, characterized in that: The mounting base (15) further includes a second fixing ring (152), which is fixedly connected to one end of the first fixing ring (151), and the second fixing 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 fixing ring (152).
6. The eccentric hemispherical valve for maintenance without interrupting water supply according to claim 3, characterized in that: It also includes a medium filling pipeline assembly (5), which includes a first pipeline (51), one end of which is connected to the inlet and outlet pipes (43), and the other end of which is connected to the outside. At least one first switching valve (52) is provided on the first pipeline (51).
7. The eccentric hemispherical valve for non-stop water supply maintenance according to claim 6, characterized in that: The medium filling pipeline assembly (5) further includes a second pipeline (53), one end of which is connected to the first pipeline (51) and located between at least one first switching valve (52) and the inlet / outlet pipe (43). The other end of the second pipeline (53) passes through the valve body (1) and communicates with the flow channel (11). A second switching valve (54) is provided on the second pipeline (53).
8. The eccentric hemispherical valve for maintenance without interrupting water supply according to claim 1, characterized in that: It also includes a pressure relief switch (6) installed on the valve cover (3), the pressure relief switch (6) being used to connect or disconnect the inspection port (14) from the outside.
9. The eccentric hemispherical valve for non-stop water supply maintenance according to any one of claims 1-8, characterized in that: The hemispherical valve core (2) has a disk (21) located in the rotation direction of the valve shaft, the axis of the disk (21) being perpendicular to and offset from the center line of the valve shaft.
10. The eccentric hemispherical valve for non-stop water supply maintenance according to claim 9, characterized in that: The sealing element includes a sealing ring (22), and a pressure plate (23) is detachably connected to the disc (21). The sealing ring (22) is fixed between the pressure plate (23) and the disc (21).