WO2025252041A1 - 截止阀及其制冷系统 - Google Patents

截止阀及其制冷系统

Info

Publication number
WO2025252041A1
WO2025252041A1 PCT/CN2025/098515 CN2025098515W WO2025252041A1 WO 2025252041 A1 WO2025252041 A1 WO 2025252041A1 CN 2025098515 W CN2025098515 W CN 2025098515W WO 2025252041 A1 WO2025252041 A1 WO 2025252041A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve core
valve
hole
sealing groove
diameter section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/098515
Other languages
English (en)
French (fr)
Inventor
寿杰
周峰
楼峰
冯光华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Dunan Artificial Environment Co Ltd
Original Assignee
Zhejiang Dunan Artificial Environment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202421310315.1U external-priority patent/CN222416076U/zh
Priority claimed from CN202422556485.4U external-priority patent/CN223152808U/zh
Application filed by Zhejiang Dunan Artificial Environment Co Ltd filed Critical Zhejiang Dunan Artificial Environment Co Ltd
Publication of WO2025252041A1 publication Critical patent/WO2025252041A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves

Definitions

  • This application relates to the field of refrigeration, and in particular to a shut-off valve and its refrigeration system.
  • Gate valves are widely used in refrigeration systems, and can control the opening and closing of pipelines by moving the valve core.
  • a first sealing groove is usually opened on the outer peripheral wall of the valve core, and a sealing ring is installed in the first sealing groove.
  • the presence of the first sealing groove causes the wall thickness of the valve core to be thinner at the corresponding location. Since an operating hole for a wrench to be inserted and turned must be opened in the valve core, the opening size of the operating hole cannot be reduced to ensure compatibility with standard wrenches. This limitation results in the valve core wall thickness having to be thinner in the area where the sealing ring is grooved, increasing the possibility of valve core cracking under high pressure conditions or frequent operation.
  • valve cores will choose to set the operating hole above the first sealing groove to avoid the setting of the operating hole affecting the thickness of the valve core arm at the first sealing groove.
  • this setting will make the overall axial length of the valve core longer, resulting in an excessively high valve body height and a large space occupation.
  • the valve core is in the fully closed state, it is easy to make it difficult for the external operating wrench to reach the bottom of the operating hole.
  • a shut-off valve and its refrigeration system are provided.
  • a shut-off valve includes: a valve body having an internal passage for media flow; and a valve core mounted within the valve body and movable axially along the valve core to block or open the passage.
  • the valve core has a top end away from the passage and a bottom end near the passage.
  • An operating hole is formed at the top end of the valve core.
  • a first sealing groove recessed inward from its outer surface, is formed on the outer periphery of the valve core. Along the axial direction of the valve core, the first sealing groove includes an enlarged diameter section and a diameter section.
  • the enlarged diameter section is located on the side of the diameter section near the top end of the valve core, and the minimum distance D1 between the outer surface of the enlarged diameter section and the axis of the valve core is greater than the distance D2 between the outer surface of the diameter section and the axis of the valve core.
  • the diameter section has a first end near the top end of the valve core and located on the valve core.
  • the operating hole has a second end near the bottom end of the valve core.
  • the enlarged diameter section has a third end near the top end of the valve core and located on the valve core.
  • the second end is located between the first end and the third end.
  • the distance between the expanded diameter section and the operating hole is defined as the wall thickness of the valve core, and the wall thickness gradually increases along the direction from the first end to the third end.
  • the bottom of the first sealing groove near the top of the valve core is chamfered, and the chamfer is set as a rounded corner or a right angle, and the chamfer is the expanded diameter section.
  • the distance between the first end and the second end along the axial direction of the valve core is h, where h satisfies: 0 ⁇ h ⁇ 7 mm.
  • h satisfies: 0 ⁇ h ⁇ 2 mm.
  • valve core is further provided with a chip removal hole, which is configured as a cylindrical hole structure.
  • the chip removal hole communicates with the operating hole and is located on the side of the operating hole away from the top of the valve core, extending in the direction of the passage.
  • a second sealing groove is also provided on the outer peripheral wall of the valve core.
  • the second sealing groove is located on the side of the first sealing groove near the bottom end of the valve core, spaced apart from the first sealing groove, and located radially outside the chip removal hole.
  • the side wall of the second sealing groove near the bottom end of the valve core is inclined toward the bottom end of the valve core relative to the depth direction of the second sealing groove.
  • the operating hole further includes an internal hexagonal hole, which is located on the side of the chip removal hole near the top of the valve core.
  • the diameter of the internal hexagonal hole is larger than the diameter of the chip removal hole.
  • a sealing groove for installing a seal is provided on the outer peripheral side of the valve core, and the sealing groove is located radially outside the chip removal hole.
  • the depth of the operating hole along the axial direction of the valve core is at least half the axial length of the valve core.
  • the internal hexagonal hole and the chip removal hole are coaxially arranged.
  • the bottom end of the valve core is provided with a clamping hole coaxially arranged with the valve core, and the clamping hole is a tapered hole.
  • the shortest distance between the chip removal hole and the clamping hole is H, where H ⁇ 2 mm.
  • the valve body has a first opening on one side and a second opening on the other side. Both the first opening and the second opening are connected to the passage.
  • the valve body also includes a valve seat located in the passage, and the valve seat has the valve port.
  • This application also provides a refrigeration system, including the shut-off valve as described above.
  • Figure 1 is a schematic diagram of the structure of one embodiment of the valve core of the gate valve provided in this application.
  • Figure 2 is a cross-sectional view of one embodiment of the valve core of the shut-off valve provided in this application.
  • Figure 3 is a cross-sectional view of one embodiment of the shut-off valve provided in this application.
  • Figure 4 is a perspective view of one embodiment of the shut-off valve provided in this application.
  • Figure 5 is a schematic diagram of one embodiment of the shut-off valve provided in this application in conjunction with an internal hex wrench.
  • Figure 6 is a cross-sectional view of one embodiment of the shut-off valve provided in this application in conjunction with an Allen wrench.
  • FIG. 7 is a schematic diagram of the refrigeration system provided in this application.
  • first and second are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.
  • a feature defined as “first” or “second” may explicitly or implicitly include at least one of that feature.
  • “multiple” means at least two, such as two, three, etc., unless otherwise explicitly specified.
  • the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium.
  • “above,” “over,” and “on top” the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.
  • “Below,” “below,” and “under” the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
  • This application provides a shut-off valve 100, in which the first sealing groove 25 for installing the sealing ring has a chamfer at the bottom of the groove in the axial direction of the valve core 20.
  • the position of the chamfer corresponds to the position of the operating hole 21, so that the operating hole 21 can be set closer to the bottom end 60 of the valve core 20, thereby shortening the overall length of the valve core 20 and optimizing the size of the valve body 10.
  • the shut-off valve 100 includes a valve body 10 and a valve core 20.
  • the valve body 10 has an internal passage 14 for media flow.
  • the valve core 20 is installed inside the valve body 10 and can move axially along the valve core 20 to block or open the passage 14, thereby opening and closing the shut-off valve 100.
  • the valve core 20 has a top end 50 away from the passage 14 and a bottom end 60 near the passage 14.
  • the top end 50 of the valve core 20 has an operating hole 21.
  • the outer periphery of the valve core 20 has a first sealing groove 25 formed by a recess from the outer surface inwards. Along the axial direction of the valve core 20, the first sealing groove 25 includes an enlarged diameter section 251 and a diameter section 252.
  • the enlarged diameter section 251 is located on the side of the diameter section 252 near the top end 50 of the valve core 20, and the minimum distance D1 between the enlarged diameter section 251 and the axis of the valve core 20 is greater than the diameter section 252.
  • the distance D2 between the diameter segment 252 and the axis of the valve core 20 is along the axial direction of the valve core 20.
  • the diameter segment 252 has a first end 2521 near the top end 50 of the valve core 20 and located inside the valve core 20.
  • the operating hole 21 has a second end 2111 near the bottom end 60 of the valve core 20.
  • the diameter expansion segment 251 has a third end 2511 near the top end 50 of the valve core 20 and located inside the valve core 20.
  • the second end 2111 is located between the first end 2521 and the third end 2511.
  • the operating hole 21 allows external operating tools to be inserted to turn the valve core 20, thereby moving the valve core 20 axially to control the opening and closing of the passage 14 or to regulate the flow rate.
  • the distance between the expanded diameter section 251 and the axis of the valve core 20 is greater than the distance between the diameter section 252 and the axis of the valve core 20. That is, along the radial direction of the valve core 20, any position of the expanded diameter section 251 is radially outside the diameter section 252. Therefore, the wall thickness of the valve core 20 at the expanded diameter section 251 is greater than the wall thickness at the diameter section 252. As a result, the expanded diameter section 251 can provide higher structural strength and is less prone to cracking.
  • the second end 2111 of the operating hole 21, near the bottom 60 of the valve core 20, is located between the first end 2521 and the third end 2511. Therefore, the bottom of the operating hole 21 extends at most to the radial inner side of the expanded diameter section 251, but not to the diameter section 252.
  • the wall thickness at the operating hole 21 position is always relatively thick, ensuring the structural strength of the valve core 20 and preventing damage to the valve core 20 during operation by the external wrench 30.
  • the distance between the second end 2111 at the bottom of the operating hole 21 and the third end 25211 at the top of the expanded diameter section 251 is the distance the operating hole 21 can extend.
  • the portion of the operating hole 21 near the top 50 of the valve core 20 can shorten this distance, thereby reducing the axial length of the valve core 20. This reduces the overall size of the shut-off valve 100, optimizes the dimensions of the shut-off valve 100, and also prevents the external operating wrench from being unable to reach the bottom of the operating hole 21 when the shut-off valve 100 is fully closed.
  • the operating hole 21 is a hexagonal socket 211, and the external operating wrench 30 is a hexagonal socket wrench. In other embodiments, the operating hole 21 may also be an octagonal socket, etc.
  • the distance between the expanded diameter section 21 and the operating hole 21 is defined as the wall thickness of the valve core 20, and the wall thickness gradually increases along the direction from the first end 2521 to the third end 2511. In this way, the gradually increasing wall thickness can bear a larger load and is easier to process.
  • the bottom of the first sealing groove 25 near the top 50 of the valve core 20 is chamfered, and the chamfer is an enlarged diameter section 251.
  • the chamfering process is simple and the structure is stable, ensuring that the wall thickness of the valve core 20 is sufficient to withstand the operation of the external wrench 30.
  • setting the chamfer to a rounded corner or a right angle can achieve a gradual increase in the wall thickness of the valve core 20 at the expansion section 251, and reduce the processing difficulty and processing cost.
  • h > 0 ensures that the second end 2111 of the operating hole 21, near the bottom 60 of the valve core 20, can extend to the enlarged diameter section 251, thereby ensuring a shortened axial length of the valve core 20. Simultaneously, it prevents the operating hole 21 from extending too close to the bottom 60 of the valve core 20, avoiding its extension to the diameter section 252, where the wall thickness of the valve core 20 is thinner, preventing the operating hole 21 from affecting the structural strength of the valve core 20.
  • the height of the expanded diameter section 251 in the axial direction of the valve core 20 is also set to at least 7mm.
  • the axial length of the expanded diameter section 251 can be set to be shorter, in order to further reduce processing costs and also reduce the impact of the expanded diameter section 251 on the seal 27 in the first sealing groove 25.
  • the valve core 20 also has a chip removal hole 212, which communicates with the operating hole 21 and is located on the side of the operating hole 21 away from the top 50 of the valve core 20. It is used to collect the chips generated during machining in the operating hole 21 and serves as a tool retraction groove to facilitate the removal of the machining tool from the operating hole 21.
  • the chip removal hole 212 and the internal hexagonal hole 211 are coaxially arranged to facilitate machining.
  • the chip removal hole 212 is a cylindrical hole structure with a uniform inner diameter, extending towards the passage 14.
  • the diameter of the chip removal hole 212 is smaller than the diameter of the operating hole 21.
  • the cylindrical shape of the chip removal hole 212 facilitates machining, and since its diameter is smaller than that of the operating hole 21, the distance between the hole wall and the outer peripheral wall of the valve core 20 increases, naturally increasing the wall thickness of the valve core 20 and improving its structural strength.
  • the sum of the lengths of the chip discharge hole 212 and the operating hole 21 is at least half the axial length of the valve core 20. This allows for a lighter valve core 20 and reduces material consumption.
  • a second sealing groove 26 is also formed on the outer peripheral wall of the valve core 20.
  • the second sealing groove 26 is located on the side of the first sealing groove 25 near the bottom end 60 of the valve core 20, spaced apart from the first sealing groove 25, and located radially outside the chip removal hole 212.
  • the inner diameter of the chip removal hole 212 is smaller than that of the operating hole 21, and no external operating wrench 30 extends into it. Therefore, the wall thickness of the valve core 20 at the second sealing groove 26 can meet the strength requirements.
  • a sealing element 27 is embedded in both the spaced first sealing groove 25 and the second sealing groove 26 to improve the sealing degree between the valve core 20 and the valve body 10.
  • a stop structure is formed on the valve core 20 between the spaced first sealing groove 25 and the second sealing groove 26. This stop structure can provide a lower limiting effect on the sealing element 27 in the first sealing groove 25 and the sealing element 27 in the second sealing groove 26.
  • the upper side here refers to the side near the top 50 of the valve core 20, and the lower side refers to the side near the bottom 60 of the valve core 20.
  • the side wall of the second sealing groove 26 near the bottom end 60 of the valve core 20 is inclined towards the bottom end 60 of the valve core 20 relative to the depth direction of the second sealing groove 26. In this way, the side wall of the second sealing groove 26 can guide the seal into the second sealing groove 26, facilitating the installation of the seal.
  • the valve core 20 of the gate valve provided in this application has a first sealing groove 25 for installing a sealing element 27, and the structure of the first sealing groove 25 is optimized so that the first sealing groove 25 has an enlarged diameter section 251 and a diameter section 252.
  • the valve core 20 wall thickness on the radially inner side corresponding to the enlarged diameter section 251 is thicker. Therefore, when the operating hole 21 on the valve core 20 for external wrench operation extends to the enlarged diameter section 251, the valve core 20 at the position of the enlarged diameter section 251 has high structural strength and will not be damaged due to the operation of the external wrench 30.
  • the enlarged diameter section 251 allows the opening position of the operating hole 21 to move a distance toward the bottom end 60 of the valve core 20 as a whole, thereby shortening the axial length of the valve core 20 and optimizing the overall size of the gate valve 100.
  • the operating hole 21 includes an internal hexagonal hole 211 for engaging with an external wrench 30.
  • the sealing groove 40 on the outer periphery of the valve core 20 is axially offset from the internal hexagonal hole 211 to ensure that the wall thickness of the valve core 20 is not too small, so as to avoid damage to the valve core 20 during long-term use.
  • the operating hole 21 includes an internal hexagonal hole 211 and a chip removal hole 212.
  • the internal hexagonal hole 211 is located on the side of the chip removal hole 212 near the top 50 of the valve core 20.
  • the diameter of the internal hexagonal hole 211 is larger than the diameter of the chip removal hole 212.
  • the valve core 20 includes an internal hexagonal section 22 and a sealing section 23.
  • the valve core 20 with the internal hexagonal hole 211 on its radially inner side is the internal hexagonal section 22, and the section with the chip removal hole 212 on its radially inner side is the sealing section 23.
  • a sealing groove 40 for installing a seal 27 is provided on the outer peripheral side of the chip removal hole 212.
  • the operating hole 21 is an internal hexagonal hole 211, which is adapted to an internal hexagonal wrench 30, enabling the force on the internal hexagonal wrench 30 to be transmitted to the valve core 20, so that the internal hexagonal wrench 30 can turn the valve core 20.
  • the sealing groove 40 is opened on the radial outer side of the chip removal hole 212, while the internal hexagonal hole 211 is located on the side of the chip removal hole 212 near the top 50. Therefore, the internal hexagonal hole 211 is located on the side of the sealing groove 40 near the top 50, and not on the radial inner side of the sealing section 23.
  • the sealing groove 40 opened on the sealing section 23 will cause the wall thickness of the valve core 20 corresponding to the sealing groove 40 to be thinner, since the internal hexagonal hole 211 is opened above the sealing groove 40, the inner diameter of the chip removal hole 212 located in the sealing section 23 can be set to be smaller (if the inner side of the sealing groove 40 is the internal hexagonal hole 211, since the internal hexagonal hole 211 needs to be adapted to the standard part of the internal hexagonal wrench 30, the inner diameter of the internal hexagonal hole 211 cannot be changed), thereby compensating for the reduction in the wall thickness of the valve core 20 caused by the sealing groove 40, so as to ensure the structural strength of the valve core 20 and avoid damage to the valve core 20 structure.
  • the sealing section 23 of the internal hexagonal section 22 of the valve core 20 of this application is misaligned.
  • the sealing section 23, the sealing groove 40 opened on the sealing section 23, and the sealing element 27 provided on the sealing section 23 are not limited by the inner diameter of the internal hexagonal section 22. Therefore, the size can be reduced to reduce the volume of the entire valve body 10 and save materials.
  • the chip removal hole 212 is used to collect the chips generated during machining of the operating hole 21, and also serves as a tool retraction groove to facilitate the removal of the machining tool from the operating hole 21.
  • the chip removal hole 212 is coaxially arranged with the internal hexagonal hole 211 for easy machining.
  • the depth of the operating hole 21 along the axial direction of the valve core 20 is at least half the axial length of the valve core 20. This enables the valve core 20 to be lightweight and reduces material consumption.
  • the depth of the operating hole 21 reaches 60%, 70%, 80%, etc., of the length of the valve core 20, and is not limited to exactly half of the above.
  • the increase in the depth of the operating hole 21 here is mainly to increase the length of the chip removal hole 212.
  • the internal hexagonal hole 211 is always located on the side of the sealing section 23 near the top 50 of the valve core 20 to ensure the wall thickness of the valve core 20.
  • the bottom end 60 of the valve core 20 is also provided with a clamping hole 24 coaxially arranged with the valve core 20.
  • the clamping hole 24 is a tapered hole, which facilitates clamping and fixing of the valve core 20 during processing.
  • the tapered hole facilitates clamping operations, and the obliquely arranged sidewall of the tapered hole can guide the clamping fixture to abut against the deepest part of the tapered hole, thereby providing a stable clamping effect.
  • the clamping hole 24 may also be configured as a circular arc-shaped hole or a rectangular hole, and is not limited to the tapered hole described above.
  • the shortest distance between the chip removal hole 212 and the clamping hole 24 is H, where H ⁇ 2mm. It should be explained that the shortest distance between the chip removal hole 212 and the clamping hole 24 refers to the distance between the bottom of the chip removal hole 212 near the bottom end 60 of the valve core 20 and the bottom of the clamping hole 24 near the top end 50 of the valve core 20. At this distance, the distance between the chip removal hole 212 and the clamping hole 24 is minimized. Setting a distance of at least 2mm between the chip removal hole 212 and the clamping hole 24 ensures the structural strength of the portion of the valve core 20 between them, preventing the problem of the valve core 20 penetrating when the distance is too close.
  • the valve body 10 has a first opening 12 on one side and a second opening 13 on the other side. Both the first opening 12 and the second opening 13 are connected to the passage 14.
  • the valve body 10 also includes a valve seat 11 located within the passage 14, and a valve port 111 is provided on the valve seat 11.
  • the valve port 111 connects the first opening 12 and the second opening 13.
  • the valve core 20 moves axially and abuts against or disengages from the valve port 111.
  • the refrigerant flows between the first opening 12 and the second opening 13.
  • the valve port 111 can control the opening and closing between the first opening 12 and the second opening 13. Therefore, the contact between the valve core 20 and the valve port 111 can control the opening and closing of the shut-off valve 100.
  • this application sets the internal hexagonal hole 211 in the operating hole 21 and the sealing groove 40 on the outer periphery of the valve core 20 to be offset axially, so that the internal hexagonal hole 211, whose inner diameter cannot be changed, is located above the sealing groove 40.
  • the radial inner side of the sealing groove 40 corresponds to the chip removal hole 212.
  • the inner diameter of the chip removal hole 212 can be set to be smaller to ensure that the wall thickness of the valve core 20 is not too small, thereby avoiding problems such as damage to the valve core 20 during long-term use.
  • This application also provides a refrigeration system 200, including the shut-off valve 100 as described above.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Sliding Valves (AREA)

Abstract

一种截止阀及其制冷系统。截止阀(100)包括阀体(10)和阀芯(20)，阀芯(20)的顶端(50)开设有操作孔(21)，阀芯(20)的外周侧开设有自外表面向内凹陷形成的第一密封槽(25)，第一密封槽(25)包括扩径段(251)和直径段(252)，扩径段(251)位于直径段(252)靠近阀芯(20)顶端(50)的一侧，直径段(252)具有靠近阀芯(20)的顶端(50)的第一端(2521)，操作孔(21)具有靠近阀芯(20)底端(60)的第二端(2111)，扩径段(251)具有靠近阀芯(20)的顶端(50)的第三端(2511)，第二端(2111)相位于第一端(2521)和第三端(2511)之间。

Description

截止阀及其制冷系统
相关申请
本申请要求2024年6月7日申请的，申请号为202421310315.1，发明名称为“截止阀及其制冷系统”以及2024年10月22日申请的，申请号为202422556485.4，发明名称为“截止阀及其制冷系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及制冷领域，特别是涉及一种截止阀及其制冷系统。
背景技术
截止阀被广泛地应用于制冷系统中，能够通过其中阀芯的移动来实现管路的通断。
为了提高阀芯与阀体之间的密封效果，通常会在阀芯的外周壁开设第一密封槽，并在第一密封槽中安装密封圈。然而，第一密封槽的存在会造成阀芯的对应位置的壁厚变薄，又因为阀芯中要开设供扳手伸入和拧动的操作孔，为了确保与通用标准件扳手的兼容性，操作孔的开孔尺寸不能减小，这一限制导致在密封圈开槽的区域，阀芯壁的厚度只能较薄，增加了在高压工况或频繁操作条件下阀芯出现破裂的可能性。
因此，有的阀芯会选择将操作孔设置在第一密封槽的上方，从而避免操作孔的设置影响到第一密封槽处的阀芯臂的厚度，但是如此设置会使得阀芯的整体轴向长度变长，导致阀体高度过高，占用位置较大，而且在阀芯处于完全关闭状态时还容易造成外部操作扳手无法伸到操作孔的底部。
发明内容
根据本申请的各种实施例，提供一种截止阀及其制冷系统。
一种截止阀，包括：阀体，所述阀体的内部具有用于供介质流动的通路；阀芯，所述阀芯安装于所述阀体内，并能够沿着所述阀芯的轴向移动，以隔断或打开所述通路；其中，所述阀芯具有远离所述通路的顶端和靠近所述通路的底端，所述阀芯的顶端开设有操作孔，所述阀芯的外周侧开设有自外表面向内凹陷形成的第一密封槽，沿着所述阀芯的轴向方向，所述第一密封槽包括扩径段和直径段，所述扩径段位于所述直径段靠近所述阀芯顶端的一侧，且所述扩径段的外表面与所述阀芯轴线的最小距离D1大于所述直径段的外表面与所述阀芯轴线的距离D2，沿着所述阀芯的轴向，所述直径段具有靠近所述阀芯的顶端且位于所述阀芯上的第一端，所述操作孔具有靠近所述阀芯底端的第二端，所述扩径段具有靠近所述阀芯的顶端且位于所述阀芯上的第三端，沿所述阀芯的轴向，所述第二端位于所述第一端和所述第三端之间。
在其中一个实施方式中，定义所述扩径段与所述操作孔之间的距离为所述阀芯的壁厚，沿着所述第一端至所述第三端的方向，所述壁厚尺寸逐渐增大。
在其中一个实施方式中，所述第一密封槽靠近所述阀芯的顶端的槽底开设有倒角，所述倒角设置为倒圆角或倒直角，所述倒角为所述扩径段。
在其中一个实施方式中，沿着所述阀芯的轴向方向，所述第一端和所述第二端之间的距离为h，h满足：0＜h≤7mm。
在其中一个实施方式中，h满足：0＜h≤2mm。
在其中一个实施方式中，所述阀芯还开设有排屑孔，所述排屑孔设置为圆柱孔结构，所述排屑孔与所述操作孔连通，且位于所述操作孔远离所述阀芯的顶端的一侧，并朝向所述通路的方向延伸。
在其中一个实施方式中，所述阀芯的外周壁上还开设有第二密封槽，所述第二密封槽位于所述第一密封槽靠近所述阀芯的底端的一侧，与所述第一密封槽间隔设置，且位于所述排屑孔的径向外侧。
在其中一个实施方式中，所述第二密封槽靠近所述阀芯的底端的一侧槽壁相对于所述第二密封槽的深度方向朝着所述阀芯的底端倾斜设置。
在其中一个实施方式中，所述操作孔还包括内六角孔，且所述内六角孔位于所述排屑孔靠近所述阀芯的顶端的一侧，所述内六角孔的孔径大于所述排屑孔的孔径，所述阀芯的外周侧开设有用于安装密封件的密封槽，且所述密封槽位于所述排屑孔的径向外侧。
在其中一个实施方式中，沿着所述阀芯的轴向，所述操作孔的深度至少为所述阀芯轴向长度的一半。
在其中一个实施方式中，所述内六角孔和所述排屑孔同轴设置。
在其中一个实施方式中，所述阀芯的底端还开设有与所述阀芯同轴设置的夹装孔，所述夹装孔为锥形孔。
在其中一个实施方式中，所述排屑孔与所述夹装孔之间的最短距离为H，H≥2mm。
在其中一个实施方式中，所述阀体的一侧开设有第一开口，另一侧开设有第二开口，所述第一开口和所述第二开口均与所述通路连通，所述阀体还包括阀座，所述阀座位于所述通路内，且所述阀座上开设有所述阀口。
本申请还提供一种制冷系统，包括如上所述的截止阀。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其它特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更好地描述和说明这里公开的那些发明的实施例和/或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例和/或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。
图1为本申请提供的截止阀的阀芯的其中一个实施例的结构示意图。
图2为本申请提供的截止阀的阀芯的其中一个实施例的剖视图。
图3为本申请提供的截止阀的其中一个实施例的剖面图。
图4为本申请提供的截止阀的其中一个实施例的立体图。
图5为本申请提供的截止阀的其中一个实施例的与内六角扳手配合的结构示意图。
图6为本申请提供的截止阀的其中一个实施例的与内六角扳手配合的剖面图。
图7为本申请提供的制冷系统的结构示意图。
图中各符号表示含义如下：
100、截止阀；10、阀体；11、阀座；111、阀口；12、第一开口；13、第
二开口；14、通路；20、阀芯；21、操作孔；211、内六角孔；2111、第二端；212、排屑孔；22、内六角段；23、密封段；24、夹装孔；25、第一密封槽；251、扩径段；2511、第三端；252、直径段；2521、第一端；26、第二密封槽；27、密封件；30、扳手；40、密封槽；50、顶端；60、底端；200、制冷系统。
具体实施方式
为使本申请的上述目的、特征和优点能够更加明显易懂，下面结合附图对本申请的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本申请。但是本申请能够以很多不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本申请内涵的情况下做类似改进，因此本申请不受下面公开的具体实施例的限制。
需要说明的是，当机构被称为“固定于”或“设置于”另一个机构，它可以直接在另一个机构上或者也可以存在居中的机构。当一个机构被认为是“连接”另一个机构，它可以是直接连接到另一个机构或者可能同时存在居中机构。本申请的说明书所使用的术语“垂直的”、“水平的”、“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“上”、“下”可以是第一特征直接和第二特征接触，或第一特征和第二特征间接地通过中间媒介接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅表示第一特征水平高度小于第二特征。
除非另有定义，本申请的说明书所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本申请。本申请的说明书所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
请参见图1-图2，本申请提供一种截止阀100，其用于安装密封圈的第一密封槽25在阀芯20的轴向方向上的槽底开设有倒角，倒角的位置与操作孔21的位置相对应，以使操作孔21可以设置得更靠近阀芯20的底端60，从而缩短阀芯20的整体长度，以优化阀体10尺寸。
截止阀100包括阀体10和阀芯20，阀体10的内部具有用于供介质流动的通路14，阀芯20安装于阀体10内，并能够沿着阀芯20的轴向移动，以隔断或打开通路14，实现截止阀100的开启和关闭。其中，阀芯20具有远离通路14的顶端50和靠近通路14的底端60，阀芯20的顶端50开设有操作孔21，阀芯20的外周侧开设有自外表面向内凹陷形成的第一密封槽25，沿着阀芯20的轴向方向，第一密封槽25包括扩径段251和直径段252，扩径段251位于直径段252靠近阀芯20顶端50的一侧，且扩径段251与阀芯20轴线的最小距离D1大于直径段252与阀芯20轴线的距离D2，沿着阀芯20的轴向，直径段252具有靠近阀芯20的顶端50且位于阀芯20的内侧的第一端2521，操作孔21具有靠近阀芯20底端60的第二端2111，扩径段251具有靠近阀芯20的顶端50且位于所述阀芯20内侧的第三端2511，沿着阀芯20的轴向，第二端2111位于第一端2521和第三端2511之间。
如此，操作孔21供外部操作工具伸入，以拧动阀芯20从而让阀芯20沿轴向移动，以此控制通路14的通断或者实现流量的调节。扩径段251与阀芯20轴线的距离大于直径段252与阀芯20轴线的距离，也即沿着阀芯20的径向方向，扩径段251的任意位置都在直径段252的径向外侧，所以扩径段251处阀芯20的壁厚大于直径段252处的壁厚，因此扩径段251能够提供更高的结构强度，不容易产生破裂。操作孔21靠近阀芯20底端60的第二端2111位于第一端2521和第三端2511之间，因此操作孔21的底部至多延伸到扩径段251的径向内侧，而不会延伸到直径段252处，所以操作孔21位置的壁厚始终较厚，保证了阀芯20的结构强度，避免外部扳手30在操作的过程中造成阀芯20破损。而操作孔21的底部的第二端2111与扩径段251顶部的第三端25211之间的距离，即为操作孔21能够延伸的距离，当操作孔21向下延伸上述距离，操作孔21靠近阀芯20的顶端50的部分就能够缩短上述距离，也就减少了阀芯20的轴向长度，从而减小整个截止阀100的大小，优化截止阀100的尺寸，还能够防止截止阀100在完全关闭的状态下外部操作扳手无法深入到操作孔21的底部。
在本实施例中，操作孔21设置为内六角孔211，外部操作扳手30则对应适用内六角扳手。在其他实施例中，操作孔21也可以设置为内八角孔等。
进一步地，定义扩径段21与操作孔21之间的距离为阀芯20的壁厚，沿着第一端2521至第三端2511的方向，壁厚逐渐增大。如此，逐渐增大的壁厚所能够承载的载荷更大，且便于加工。
在本实施例中，第一密封槽25靠近阀芯20的顶端50的槽底开设有倒角，倒角为扩径段251。开设倒角的工艺难度低，且结构稳定，能够保证阀芯20的壁厚足够承载外部扳手30的操作。
示例性地，倒角设置为倒圆角或倒直角，均能够实现扩径段251处阀芯20壁厚的逐渐增大，并减低加工难度和加工成本。
沿着阀芯20的轴向方向，第一端2521和第二端2111之间的距离为h，h满足：0＜h≤7mm。如此，h＞0确保操作孔21靠近阀芯20底端60的第二端2111必然能够延伸至扩径段251处，从而保证阀芯20轴向长度缩短，同时防止操作孔21伸入的过于靠近阀芯20底端60，避免其延伸到直径段252处，直径段252处的阀芯20的壁厚较薄，防止操作孔21延伸到此处影响阀芯20结构强度。
对应于上述的尺寸关系，扩径段251在阀芯20轴线方向上的高度也设置为至少7mm。
更进一步地，h满足：0＜h≤2mm，因此扩径段251的轴向长度可以设置得更短，以进一步降低加工成本，还能够减少扩径段251对于第一密封槽25中的密封件27的影响。
阀芯20还开设有排屑孔212，排屑孔212与操作孔21连通，且位于操作孔21远离阀芯20的顶端50的一侧。用于容纳操作孔21在加工时产生的碎屑，并作为退刀槽方便加工刀具退出操作孔21。
在一些实施例中，排屑孔212与内六角孔211同轴设置，以方便加工。
在本实施例中，沿着阀芯20的轴向，排屑孔212为内径一致的圆柱孔结构，并朝向通路14的方向延伸，排屑孔212的直径小于操作孔21的直径。如此，排屑孔212作为圆柱形孔方便加工，且排屑孔212的直径小于操作孔21的直径，排屑孔212的内径减小以后，排屑孔212的孔壁距离阀芯20的外周壁的距离就变远了，阀芯20的壁厚也自然增大了，提高了阀芯20的结构强度。
进一步地，沿着阀芯20的轴向，排屑孔212和操作孔21的长度之和至少为阀芯20轴向长度的一半。如此，能够实现阀芯20的轻量化并减少耗材。
阀芯20的外周壁上还开设有第二密封槽26，第二密封槽26位于第一密封槽25靠近阀芯20的底端60的一侧，与第一密封槽25间隔设置，且位于排屑孔212的径向外侧。排屑孔212的内径小于操作孔21，且没有外部操作扳手30伸入，因此第二密封槽26处的阀芯20壁厚能够满足强度。两个间隔设置的第一密封槽25和第二密封槽26中均嵌设有密封件27，以提高阀芯20与阀体10之间的密封度。间隔设置的第一密封槽25和第二密封槽26之间的阀芯20形成有止挡结构，该止挡结构能够对第一密封槽25中的密封件27提供下侧的限位效果，对第二密封槽26中的密封件27提供下侧的限位效果。
需要解释的是，此处的上侧即为靠近阀芯20顶端50的一侧，下侧为靠近阀芯20底端60的一侧。
进一步地，第二密封槽26靠近阀芯20的底端60的一侧槽壁相对于第二密封槽26的深度方向朝着阀芯20的底端60倾斜设置。如此，第二密封槽26的槽侧壁能够引导密封件进入第二密封槽26内，方便密封件的安装。
相较于相关技术，本申请提供的截止阀的阀芯20上开设有安装密封件27的第一密封槽25，且优化了第一密封槽25的结构，使得第一密封槽25具有扩径段251和直径段252，扩径段251所对应的径向内侧的阀芯20壁厚较厚，因此当阀芯20上用于供外部扳手操作的操作孔21延伸到扩径段251上时，扩径段251位置处的阀芯20结构强度高，不会由于外部扳手30的操作而引发阀芯20破损，且扩径段251使得操作孔21的开设位置能够整体朝向阀芯20的底端60移动一段距离，从而缩短阀芯20的轴向长度，优化截止阀100的整体尺寸。
在一些实施例中，操作孔21包括用于和外部扳手30配合的内六角孔211，阀芯20外周侧的密封槽40与内六角孔211在轴向上错位设置，以确保阀芯20的壁厚不会过小，以避免阀芯20在长时间使用过程中出现破损等问题。
请参见图3-图6，在一些实施例中，操作孔21包括内六角孔211和排屑孔212，且内六角孔211位于排屑孔212靠近阀芯20的顶端50的一侧，内六角孔211的孔径大于排屑孔212的孔径，阀芯20包括内六角段22和密封段23，径向内侧为内六角孔211的阀芯20为内六角段22，径向内侧为排屑孔212的为密封段23，排屑孔212的外周侧开设有用于安装密封件27的密封槽40。如此，操作孔21的至少部分为内六角孔211，内六角孔211适配于内六角扳手30，能够将内六角扳手30上的力传递到阀芯20上，以使内六角扳手30能够拧动阀芯20。并且，密封槽40开设于排屑孔212的径向外侧，而内六角孔211位于排屑孔212靠近顶端50的一侧，所以说内六角孔211的开设位置位于密封槽40靠近顶端50的一侧，而不会位于密封段23的径向内侧，所以密封段23上开设的密封槽40虽然会造成与密封槽40对应的该段阀芯20的壁厚变薄，但是由于内六角孔211开设于密封槽40的上方，因此位于密封段23内的排屑孔212的内径可以设置得较小(若密封槽40内侧为内六角孔211，由于内六角孔211需要适配于标准件的内六角扳手30，因此内六角孔211的内径无法改变)，从而弥补密封槽40所减小的阀芯20壁厚，以保证阀芯20的结构强度，以避免阀芯20结构损坏。
此外，由于相关技术中内六角孔的直径较大，因此阀芯内六角段上开设的密封槽的外径也相应增大，因此嵌设于密封槽中的密封件的尺寸以及阀体形成通路的内壁都较大，相较于相关技术，本申请的阀芯20的内六角段22的密封段23错位设置，密封段23以及开设于密封段23上的密封槽40和设置在密封段23上的密封件27都不会受到内六角段22的内径的限制，因此尺寸可以减小，以减小整个阀体10的体积，节约耗材。
排屑孔212用于容纳操作孔21在加工时产生的碎屑，并作为退刀槽方便加工刀具退出操作孔21。排屑孔212与内六角孔211同轴设置，以方便加工。
在一些实施例中，沿着阀芯20的轴向，操作孔21的深度至少为阀芯20轴向长度的一半。如此，能够实现阀芯20的轻量化并减少耗材。
可以理解地，在本实施例中，操作孔21的深度达到阀芯20长度的60％、70％、80％等，而不限于上述刚好的一半。
由于操作孔21分为内六角孔211和排屑孔212，此处操作孔21的深度增长主要是增长排屑孔212的长度，内六角孔211始终位于密封段23靠近阀芯20顶端50的一侧，以确保阀芯20的壁厚。
在一些实施例中，阀芯20的底端60还开设有与阀芯20同轴设置的夹装孔24，夹装孔24为锥形孔，从而方便对于阀芯20加工时夹持和固定阀芯20。锥形孔方便夹持工作，锥形孔的斜向设置的侧壁能够引导夹持工装抵接于锥形孔的最深处从而提供稳定的夹持效果。
在其他实施例中，夹装孔24也可以设置为截面为圆弧形孔或者矩形孔，而不限于上述的锥形孔。
在一些实施例中，排屑孔212与夹装孔24之间的最短距离为H，H≥2mm。需要解释的是，排屑孔212与夹装孔24之间的最短距离是指排屑孔212靠近阀芯20的底端60的孔底与夹装孔24靠近阀芯20的顶端50的孔底之间的距离，在此处排屑孔212与夹装孔24的距离达到最短。设置排屑孔212与夹装孔24之间至少相隔2mm能够确保排屑孔212与夹装孔24之间的部分阀芯20的结构强度，避免两者距离过近以后贯穿阀芯20的问题出现。
在一些实施例中，阀体10的一侧开设有第一开口12，另一侧开设有第二开口13，第一开口12和第二开口13均与通路14连通，阀体10还包括阀座11，阀座11位于通路14内，且阀座11上开设有阀口111，阀口111连通第一开口12和第二开口13，阀芯20沿着轴向移动并与阀口111抵接或脱离。制冷介质通过在第一开口12和第二开口13之间流通，阀口111能够控制第一开口12和第二开口13之间的通断，因此阀芯20与阀口111的抵接能够控制截止阀100的通断。
相较于相关技术，本申请通过将操作孔21中的内六角孔211与阀芯20外周侧的密封槽40在轴向上错位设置，让无法改变内径大小的内六角孔211位于密封槽40的上方，密封槽40的径向内侧所对应的为排屑孔212，排屑孔212的内径可以设置得较小，以确保阀芯20的壁厚不会过小，从而避免阀芯20在长时间使用过程中出现破损等问题。
本申请还提供一种制冷系统200，包括如上所述的截止阀100。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (14)

  1. 一种截止阀，其特征在于，包括：
    阀体，所述阀体的内部具有用于供介质流动的通路；
    阀芯，所述阀芯安装于所述阀体内，并能够沿着所述阀芯的轴向移动，以隔断或打开所述通路；
    其中，所述阀芯具有远离所述通路的顶端和靠近所述通路的底端，所述阀芯的顶端开设有操作孔，所述阀芯的外周侧开设有自外表面向内凹陷形成的第一密封槽，沿着所述阀芯的轴向方向，所述第一密封槽包括扩径段和直径段，所述扩径段位于所述直径段靠近所述阀芯顶端的一侧，且所述扩径段的外表面与所述阀芯轴线的最小距离D1大于所述直径段的外表面与所述阀芯轴线的距离D2；
    沿着所述阀芯的轴向，所述直径段具有靠近所述阀芯的顶端且位于所述阀芯上的第一端，所述操作孔具有靠近所述阀芯底端的第二端，所述扩径段具有靠近所述阀芯的顶端且位于所述阀芯上的第三端，沿所述阀芯的轴向，所述第二端位于所述第一端和第三端之间。
  2. 根据权利要求1所述的截止阀，其中，定义所述扩径段与所述操作孔之间的距离为所述阀芯的壁厚，沿着所述第一端至所述第三端的方向，所述壁厚尺寸逐渐增大。
  3. 根据权利要求2所述的截止阀，其中，所述第一密封槽靠近所述阀芯的顶端的槽底开设有倒角，所述倒角设置为倒圆角或倒直角，所述倒角为所述扩径段。
  4. 根据权利要求1所述的截止阀，其中，沿着所述阀芯的轴向方向，所述第一端和所述第二端之间的距离为h，h满足：0＜h≤7mm。
  5. 根据权利要求4所述的截止阀，其中，h满足：0＜h≤2mm。
  6. 根据权利要求1所述的截止阀，其中，所述阀芯还开设有排屑孔，所述排屑孔设置为圆柱孔结构，所述排屑孔与所述操作孔连通，且位于所述操作孔远离所述阀芯的顶端的一侧，并朝向所述通路的方向延伸；和/或，所述阀芯的底端还开设有与所述阀芯同轴设置的夹装孔，所述夹装孔为锥形孔。
  7. 根据权利要求6所述的截止阀，其中，所述阀芯的外周壁上还开设有第二密封槽，所述第二密封槽位于所述第一密封槽靠近所述阀芯的底端的一侧，与所述第一密封槽间隔设置，且位于所述排屑孔的径向外侧。
  8. 根据权利要求7所述的截止阀，其中，所述第二密封槽靠近所述阀芯的底端的一侧槽壁相对于所述第二密封槽的深度方向朝着所述阀芯的底端倾斜设置。
  9. 根据权利要求6所述的截止阀，其中，所述操作孔还包括内六角孔，且所述内六角孔位于所述排屑孔靠近所述阀芯的顶端的一侧，所述内六角孔的孔径大于所述排屑孔的孔径，所述阀芯的外周侧开设有用于安装密封件的密封槽，且所述密封槽位于所述排屑孔的径向外侧。
  10. 根据权利要求9所述的截止阀，其中，沿着所述阀芯的轴向，所述操作孔的深度至少为所述阀芯轴向长度的一半。
  11. 根据权利要求9所述的截止阀，其中，所述内六角孔和所述排屑孔同轴设置。
  12. 根据权利要求6所述的截止阀，其中，所述排屑孔与所述夹装孔之间的最短距离为H，H≥2mm。
  13. 根据权利要求1所述的截止阀，其中，所述阀体的一侧开设有第一开口，另一侧开设有第二开口，所述第一开口和所述第二开口均与所述通路连通，所述阀体还包括阀座，所述阀座位于所述通路内，且所述阀座上开设有所述阀口。
  14. 一种制冷系统，其特征在于，包括如权利要求1-13任一项所述的截止阀。
PCT/CN2025/098515 2024-06-07 2025-05-30 截止阀及其制冷系统 Pending WO2025252041A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10274342A (ja) * 1997-03-31 1998-10-13 Chiyoda Kucho Kiki Kk バルブ装置
JP2002147647A (ja) * 2000-11-14 2002-05-22 Chiyoda Kucho Kiki Kk バルブ装置
CN106989182A (zh) * 2016-01-21 2017-07-28 浙江三花智能控制股份有限公司 截止阀
CN216742841U (zh) * 2021-11-23 2022-06-14 浙江盾安人工环境股份有限公司 截止阀
CN216789244U (zh) * 2021-12-18 2022-06-21 浙江盾安人工环境股份有限公司 一种截止阀

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10274342A (ja) * 1997-03-31 1998-10-13 Chiyoda Kucho Kiki Kk バルブ装置
JP2002147647A (ja) * 2000-11-14 2002-05-22 Chiyoda Kucho Kiki Kk バルブ装置
CN106989182A (zh) * 2016-01-21 2017-07-28 浙江三花智能控制股份有限公司 截止阀
CN216742841U (zh) * 2021-11-23 2022-06-14 浙江盾安人工环境股份有限公司 截止阀
CN216789244U (zh) * 2021-12-18 2022-06-21 浙江盾安人工环境股份有限公司 一种截止阀

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