WO2023143180A1 - 截止阀及具有其的制冷*** - Google Patents

截止阀及具有其的制冷*** Download PDF

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Publication number
WO2023143180A1
WO2023143180A1 PCT/CN2023/072346 CN2023072346W WO2023143180A1 WO 2023143180 A1 WO2023143180 A1 WO 2023143180A1 CN 2023072346 W CN2023072346 W CN 2023072346W WO 2023143180 A1 WO2023143180 A1 WO 2023143180A1
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WO
WIPO (PCT)
Prior art keywords
valve
groove
valve core
valve body
sealing member
Prior art date
Application number
PCT/CN2023/072346
Other languages
English (en)
French (fr)
Inventor
陈狄永
楼峰
周峰
冯光华
Original Assignee
浙江盾安人工环境股份有限公司
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Application filed by 浙江盾安人工环境股份有限公司 filed Critical 浙江盾安人工环境股份有限公司
Publication of WO2023143180A1 publication Critical patent/WO2023143180A1/zh

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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
    • F16K1/02—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 with screw-spindle
    • F16K1/04—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 with screw-spindle with a cut-off member rigid with the spindle, e.g. main valves
    • 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
    • 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
    • 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
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • F16K24/06—Devices, e.g. valves, for venting or aerating enclosures for aerating only
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • 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
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • F16K41/06—Spindle sealings with stuffing-box ; Sealing rings with at least one ring attached to both spindle and housing

Definitions

  • the application relates to the technical field of refrigeration, in particular to a shut-off valve and a refrigeration system having the same.
  • the stop valve In the refrigeration system, the stop valve is used to cut off and throttle the medium in the pipeline where it is located.
  • the opening and closing part of the stop valve is the valve core, which is mainly used to cut off the medium in the low temperature environment.
  • the valve core can abut against the valve port to open and close the globe valve, but the closing scheme of the valve core and the valve port generally adopts a hard seal, that is, the valve core directly contacts the valve port. Poor sealing performance, more likely to cause leakage.
  • One solution is to provide a seal between the valve core and the valve port to improve the sealing performance, but problems such as offset and falling off of the seal between the valve core and the valve port are prone to occur.
  • a shut-off valve including: a valve body and a valve core, the valve body is provided with a valve port; at least a part of the valve core is arranged inside the valve body, and can be The axial movement of the valve body is used to block or open the valve port.
  • a first groove is opened on the side of the valve core facing the valve port, and a groove is embedded in the first groove.
  • the first sealing member is interference-fitted with the first groove, and the inner wall of the first groove is provided with a limiting portion, and the limiting portion can limit the position of the first sealing member.
  • the valve body includes an end cover and a valve seat, the end cover is located at the top of the valve body or is arranged inside the valve body, and the end cover is matched with the valve core sealing the valve body;
  • valve seat is arranged in the valve body, the valve seat forms the valve port, and the first sealing member can abut against the peripheral side wall of the valve seat forming the valve port to block the valve port. valve port.
  • the hardness of the first sealing member is smaller than that of the valve core, the first groove is an annular groove, the first sealing member is a sealing ring, and the sealing ring is made of red copper.
  • the groove width of the first groove gradually decreases along a direction close to the valve port, so as to form the limiting portion.
  • the inner wall of the first groove close to the outer peripheral side of the valve core gradually approaches the central axis of the valve core along the direction toward the valve port, thereby forming an inclined surface,
  • the inclined surface is the limiting part.
  • the inner wall of the first groove close to the central axis of the valve core gradually moves away from the central axis of the valve core along the direction toward the valve port, thereby forming an inclined surface.
  • the inclined surface is the limiting part.
  • the angle ⁇ between the inclined surface and the central axis of the valve core is 1°-10°
  • the guide section is provided with a guide section, and the guide section is an arc-shaped inverted horn.
  • the valve core is provided with a guide part at one end facing the valve port, and the guide part can guide the valve core into the valve port, and the first sealing member is sleeved on the guide part
  • the guide portion is provided with a guide section, and the guide section is chamfered in a circular arc shape.
  • the valve core is provided with an operating part and a connecting part, and the operating part is connected to Connected to the end of the connecting part away from the valve seat, the diameter of the connecting part is larger than the diameter of the operating part, a step is formed between the connecting part and the operating part, and a second A sealing element, the second sealing element abuts against a side of the end cover close to the valve core.
  • a third sealing member is provided on the connecting portion, the third sealing member circumferentially surrounds the outer peripheral side of the connecting portion, and the outer peripheral side of the third sealing member abuts against on the inner wall of the valve body to seal the valve body.
  • the present application also provides a refrigeration system, including the above-mentioned shut-off valve.
  • FIG. 1 is a cross-sectional view of a shutoff valve according to one or more embodiments.
  • Fig. 2 is a schematic structural view of a valve core without a seal according to one or more embodiments.
  • Figure 3 is a cross-sectional view of a valve plug with a seal installed according to one or more embodiments.
  • Figure 4 is a perspective view of a shutoff valve according to one or more embodiments.
  • Fig. 5 is a schematic structural diagram of a refrigeration system according to one or more embodiments.
  • a component when a component is said to be “mounted on” another component, it may be directly on the other component or there may be an intervening component.
  • a component When a component is said to be “set on” another component, it may be set directly on the other component or there may be an intervening component at the same time.
  • a component When a component is said to be “fixed” to another component, it may be directly fixed to the other component or there may be an intervening component at the same time.
  • this shut-off valve 100 is installed in a refrigerating system 200 for connecting and cutting off pipelines.
  • the globe valve 100 includes a valve body 10 and a valve core 20 , and the valve body 10 is connected to the valve core 20 .
  • the interior of the valve body 10 is hollow for accommodating components such as the valve core 20 ; at least a part of the valve core 20 is disposed inside the valve body 10 and can move axially along the valve body 10 .
  • the valve body 10 is also provided with a first opening 11 and a second opening 13 .
  • the first opening 11 is away from the valve body
  • One side of the valve body 10 is connected with a first communication pipe 12, and the first opening 11 communicates with the outside world through the first communication pipe 12; the side of the second opening 13 away from the valve body 10 is connected with a second communication pipe 14, and the second opening 13 passes through
  • the second communication pipe 14 communicates with the outside world.
  • the first communication pipe 12 and the second communication pipe 14 serve as the inlet or outlet of the medium respectively.
  • the first communication pipe 12 When the first communication pipe 12 is used as the inlet of the medium, the medium enters the shut-off valve 100 from the first communication pipe 12 and enters the interior of the valve body 10 through the first opening 11.
  • the medium passes through the second opening 13 , flows out of the stop valve 100 through the second communication pipe 14 .
  • the medium can also enter the valve body 10 from the second communication pipe 14 through the second opening 13 , and then flow out of the shut-off valve 100 through the first opening 11 and the first communication pipe 12 .
  • the valve body 10 also includes an end cover 15 and a valve seat 16.
  • the end cover 15 is located at the top of the valve body 10 and cooperates with the valve core 20 to seal the valve body 10, thereby preventing impurities such as dust and powder from entering the valve body 10. Affect the tightness of the shut-off valve 100 and the purity of the medium in the valve body 10, and prevent the realization of other related functions of the shut-off valve 100 from being affected.
  • the end cap 15 can also be arranged inside the valve body 10, that is, the outer peripheral side of the end cap 15 abuts against the inner peripheral side of the valve body 10, and the inner peripheral side of the end cap 15 and the outer peripheral side of the valve core 20 Abutting, so set, the cooperation between the end cover 15 and the valve core 20 can also play the role of sealing the valve body 10 .
  • the position of the end cap 15 is not limited to the solution described in this embodiment, as long as the above functions can be realized.
  • the valve seat 16 is arranged in the valve body 10 and is used to abut and cooperate with the valve core 20 to realize communication or isolation inside the valve body 10 .
  • the valve seat 16 is disposed at the first opening 11 , and in other embodiments, the valve seat 16 may also be disposed between the first opening 11 and the second opening 13 .
  • a valve port 161 is opened on the valve seat 16 , and the valve port 161 communicates with the first opening 11 to jointly form a channel for the medium to flow in or out.
  • the axial movement of the spool 20 can block or open the valve port 161, so as to cut off the medium.
  • the valve seat 16 is provided separately from the valve body 10 to reduce the difficulty of processing.
  • the valve seat 16 can also be directly formed by the valve body 10 , and the valve port 161 can also be directly opened on the valve body 10 .
  • the valve core 20 is provided with a first groove 22 on the side facing the valve port 161, and a first seal 221 is embedded in the first groove 22, and the first seal 221 and the first groove
  • the groove 22 is an interference fit.
  • the first sealing member 221 can improve the sealing performance between the valve core 20 and the valve seat 16, and due to the extrusion force generated by the deformation of the first sealing member 221 itself, the first sealing member 221 and the first groove 22 are mutually supported by each other. Supporting force, so as to realize the fixed limit, and prevent the first sealing member 221 from falling off from the first groove 22, which will affect the sealing performance of the shut-off valve 100 .
  • the hardness of the first sealing member 221 is different from that of the valve core 20. Through the difference in material and hardness between the two, the side with the smaller hardness will produce greater deformation, so as to enhance the limit strength of the two and prevent the two sides from being damaged due to material and hardness.
  • the hardness is the same, and in the process of interference fit, cracking occurs.
  • the hardness of the first sealing member 221 is smaller than that of the valve core 20, so that the first sealing member 221 is more easily embedded in the first groove 22, and the abutment between the first sealing member 221 and the valve seat 16 can be more closely.
  • the inner wall of the first groove 22 is provided with a limiting portion 222, which can limit the first sealing member 221, and the limiting portion 222 can further limit the first sealing member 221 to the first position. groove 22 to prevent it from falling off.
  • the groove width of the first groove 22 gradually decreases along the direction close to the valve port 161 , so as to form the limiting portion 222 .
  • the size of the notch of the first groove 22 is smaller than the size of the body of the first groove 22 and the size of the bottom of the groove, then the first sealing member 221 is more difficult to fall out from the notch of the first groove 22, and passes through the notch of the first groove 22.
  • the groove width of the groove 22 is used to limit the position of the first sealing member 221, the structure is simple, and no additional components are required.
  • the inner wall of the first groove 22 close to the outer peripheral side of the valve core 20 gradually approaches the central axis of the valve core 20 along the direction toward the valve port 161, thereby forming an inclined surface 22A, which is the limiting portion 222.
  • the inner wall of the axis gradually moves away from the central axis of the valve core 20 along the direction toward the valve port 161, so as to form an inclined surface 22A as a stopper 222.
  • the formation method of the stopper 222 is not limited to the formation method described in this embodiment. .
  • the included angle ⁇ between the inclined surface 22A and the central axis of the valve core 20 is 1°-10°, which not only ensures the firmness of the limit portion 222 for the first seal 221, but also prevents it from falling out of the first groove 22. , and prevent the notch of the first groove 22 from being too small, causing the first sealing member 221 to be difficult to insert into the first groove 22, or causing the first sealing member 221 or the first groove 22 to be damaged during the inserting process. damage.
  • the included angle ⁇ between the inclined surface 22A and the central axis of the valve core 20 is 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, It can also be 1.5°, 2.5°, etc., and the degree of the above-mentioned included angle ⁇ only needs to be in the range of 1°-10°, and is not limited to an integer.
  • the first groove 22 is an annular groove
  • the first seal 221 is a sealing ring, thereby increasing the contact area between the first groove 22 and the first seal 221 as much as possible, so that the first groove
  • the groove 22 and the first sealing member 221 cooperate more closely, and the contact area between the sealing ring and the valve seat 16 is also larger, and the sealing ring can correspond to the shape of the valve port 161 to achieve sealing in all directions and further enhance the sealing of the valve core Effect.
  • the sealing ring is made of red copper, which can ensure the strength and at the same time have a certain flexibility, so that the compression deformation can enhance the sealing performance.
  • the valve core 20 includes an operating part 21 , a guiding part 23 and a connecting part 26 , and the connecting part 26 connects the operating part 21 and the guiding part 23 .
  • the operating part 21 is located at an end of the connecting part 26 away from the valve seat 16 , and one end of the operating part 21 protrudes from the end cover 15 .
  • the guiding portion 23 is located at an end of the connecting portion 26 close to the valve seat 16 , and can guide the valve core 20 into the valve port 161 .
  • the operating part 21 protrudes from the upper surface of the end cover 15, which is easy to process and disassemble.
  • the operating part 21 is set as a hollow structure with an open upper end, and a plurality of planes are evenly distributed on the inner surface of the operating part 21 at intervals, so that Suitable for tools such as hexagonal wrench.
  • the planes of the inner surface of the operating portion 21 may also be set to be uniformly distributed without intervals, so as to be suitable for wrenches with irregular shapes.
  • the outer peripheral side of the operating part 21 is provided with a first threaded section 211
  • the inner surface of the end cover 15 is provided with a second threaded section 151
  • the second threaded section 151 cooperates with the first threaded section 211 to make the valve core 20 move axially.
  • the outer wall of the valve core 20 abuts against the inner wall of the valve body 10 so that the valve core 20 can move axially along the inner wall of the valve body 10 .
  • the diameter of the connection part 26 is larger than the diameter of the operation part 21, so that a step is formed between the connection part 26 and the operation part 21, and a second seal 24 is provided on the step, and the second seal 24 can abut against the end cap 15 close to the One side of the spool 20.
  • the end of the valve core 20 close to the operating part 21 is also provided with a third sealing member 25, the third sealing member 25 surrounds the outer peripheral side of the valve core 20 in the circumferential direction, and the outer peripheral side of the third sealing member 25 abuts against the valve body along the circumferential direction 10, so as to seal the valve body 10, so that the medium will not leak during the communication process between the first opening 11 and the second opening 13.
  • the third sealing member 25 can also be replaced by a sealing gasket and other components that can also play a sealing role.
  • the guide part 23 is located at the end of the valve core 20 close to the first opening 11 , and is used to guide the valve core 20 to be inserted into the valve port 161 to realize the sealing fit between the valve core 20 and the valve port 161 .
  • the guide section 23 is provided with a guide section 231.
  • the guide section 231 is chamfered in a circular arc shape, which facilitates the insertion of the valve core 20 into the valve port 161, and prevents the valve core 20 from colliding with and interfering with the valve port 161. Smoothly realize the action of switching valve.
  • the shut-off valve 100 further includes a valve assembly 30 connected to the valve body 10 .
  • the air valve assembly 30 is arranged opposite to the second opening 13 , and serves as an air charging inlet or an air discharge outlet, and is used for supplementing or releasing a medium to the entire refrigeration system 200 .
  • the valve The axis of the assembly 30 can also be arranged perpendicular to the axis of the second opening 13 , and the valve assembly 30 can also be arranged at other positions of the valve body 10 .
  • the valve assembly 30 includes a connecting body 33 connected to the valve body 10 , and the connecting body 33 serves as a channel for the medium to flow into or out of the valve body 10 .
  • the valve assembly 30 also includes a valve core 35 , a casing 31 and a fourth seal 32 .
  • the valve core 35 is arranged in the connecting body 33, which can make the inside of the valve body 10 communicate with or isolate the inside of the connecting body 33.
  • the casing 31 is set on the outer peripheral side of the connecting body 33 to protect the valve core 35 from external impurities Entering; the fourth seal 32 is located between the casing 31 and the connecting body 33 , and cooperates with the casing 31 to seal the connecting body 33 .
  • one end of the valve core 35 is provided with an elastic member 34, and when the valve core 35 is not subjected to external pressure, it will remain in a closed state. At this time, the connecting body 33 remains sealed to isolate the inside of the valve body 10 from the outside world.
  • the valve core 35 squeezes the elastic member 34 and moves toward the direction close to the valve body 10, thereby releasing the blockage, so that the inside of the valve body 10 communicates with the inside of the connecting body 33, so that the medium can pass through. into the valve body 10 or out of the valve body 10.
  • the elastic member 34 is used for the reset of the valve core 35 .
  • the present application also provides a refrigeration system 200, including the above-mentioned cut-off valve 100, the cut-off valve 100 is installed in the medium passage of the refrigeration system 200 to control the cut-off and circulation of the medium passage, and is used to System 200 replenishes media.
  • the operating part 21 on the top of the shut-off valve 100 is twisted, and the operating part 21 rotates synchronously with the valve core 20, and the first threaded segment 211 and The cooperation of the second thread segment 151 drives the valve core 20 to move axially relative to the end cover 15, so that the guide part 23 at the bottom end of the valve core 20 is inserted into the valve port 161, and the first sealing member 221 abuts against the valve seat 16 to seal
  • the first communication pipe 12 so as to realize the connection between the first communication pipe 12 and the second communication pipe 14 truncate.
  • this application improves the sealing performance between the valve core 20 and the valve seat 16 through the first seal 221, and due to the extrusion force generated by the deformation of the first seal 221 itself, the first seal 221 and the second The grooves 22 are mutually supported by each other, so as to achieve fixed positioning and prevent the first sealing member 221 from falling off from the first groove 22 , affecting the sealing performance of the shut-off valve 100 .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

截止阀（100）及具有其的制冷***（200）。该截止阀（100）包括：阀体（10），阀体（10）开设有阀口（161）；阀芯（20），阀芯（20）的至少一部分设置在阀体（10）内部，并能够沿着阀体（10）的轴向移动，以封堵或打开阀口（161）；阀芯（20）朝向阀口（161）的一侧开设有第一凹槽（22），第一凹槽（22）内嵌设有第一密封件（221），第一密封件（221）与第一凹槽（22）过盈配合，第一凹槽（22）的内壁设有限位部（222），限位部（222）能够对第一密封件（221）进行限位。

Description

截止阀及具有其的制冷***
相关申请
本申请要求2022年1月27日申请的，申请号为202220233391.1，发明名称为“截止阀及其制冷***”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
本申请涉及制冷技术领域，特别是涉及截止阀及具有其的制冷***。
背景技术
在制冷***中，截止阀用于对其所在的管路中的介质起切断和节流的重要作用，截止阀的启闭件是阀芯，其主要应用于低温环境下对介质的截断。
相关技术的截止阀中，阀芯能够抵接于阀口以启闭截止阀，但是阀芯与阀口的闭合方案一般采取硬密封，即阀芯与阀口直接抵接，这种密封方案的密封性能差，比较容易造成泄漏。一种解决方案为，在阀芯和阀口之间设置密封件，以提高密封性能，但是容易出现密封件从阀芯与阀口之间发生偏移和脱落等问题。
发明内容
根据本申请的各种实施例，提供一种截止阀，包括：阀体和阀芯，所述阀体设有阀口；所述至少一部分阀芯的设置在所述阀体内部，并能够沿着所述阀体的轴向移动，以封堵或打开所述阀口。
所述阀芯朝向所述阀口的一侧开设有第一凹槽，所述第一凹槽内嵌设有 第一密封件，所述第一密封件与所述第一凹槽过盈配合，所述第一凹槽的内壁设有限位部，所述限位部能够对第一密封件进行限位。
在其中一个实施方式中，所述阀体包括端盖和阀座，所述端盖位于所述阀体的最顶端或设置于所述阀体的内部，所述端盖与所述阀芯配合密封住所述阀体；
所述阀座设于所述阀体内，所述阀座形成所述阀口，所述第一密封件能够与所述阀座形成所述阀口的周侧壁抵接，以封堵所述阀口。
在其中一个实施方式中，所述第一密封件的硬度小于所述阀芯，所述第一凹槽为环形凹槽，所述第一密封件为密封圈，所述密封圈为紫铜材质。
在其中一个实施方式中，所述第一凹槽的槽宽沿靠近所述阀口的方向逐渐减小，以此形成所述限位部。
在其中一个实施方式中，所述第一凹槽的靠近所述阀芯外周侧的内壁，沿着朝向所述阀口的方向，逐渐靠近所述阀芯的中轴线，以此形成倾斜面，所述倾斜面为所述限位部。
在其中一个实施方式中，所述第一凹槽靠近所述阀芯中轴线的内壁，沿着朝向所述阀口的方向，逐渐远离所述阀芯的中轴线，以此形成倾斜面，所述倾斜面为所述限位部。
在其中一个实施方式中，所述倾斜面与所述阀芯的中轴线的夹角α度数为1°-10°，所述引导部上设有导向段，所述导向段为圆弧形状倒角。
在其中一个实施方式中，所述阀芯朝向所述阀口的一端设有引导部，所述引导部能够引导阀芯进入所述阀口，所述第一密封件套设于所述引导部外侧，所述引导部上设有导向段，所述导向段为圆弧形状倒角。
在其中一个实施方式中，所述阀芯设有操作部和连接部，所述操作部连 接于所述连接部远离所述阀座的一端，所述连接部的直径大于所述操作部的直径，所述连接部与所述操作部之间形成台阶，所述台阶上设有第二密封件，所述第二密封件与所述端盖靠近所述阀芯的一侧抵接。
在其中一个实施方式中，所述连接部上设置有第三密封件，所述第三密封件周向环绕于所述连接部的外周侧，所述第三密封件的外周侧周向抵接于所述阀体的内壁，以此密封所述阀体。
本申请还提供一种制冷***，包括上述的截止阀。
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为根据一个或多个实施例的截止阀的剖面图。
图2为根据一个或多个实施例的阀芯未安装密封件时的结构示意图。
图3为根据一个或多个实施例的阀芯安装密封件后的剖面图。
图4为根据一个或多个实施例的截止阀的立体图。
图5为根据一个或多个实施例的制冷***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、第一开口；12、第一连通管；13、第二开口；14、第二连通管；15、端盖；151、第二螺纹段；16、阀座；161、阀口；20、阀芯；21、操作部；211、第一螺纹段；22、第一凹槽；221、第一密封件；22A、倾斜面；222、限位部；23、引导部；231、导向段；24、第二密封 件；25、第三密封件；26、连接部；30、气门组件；31、罩壳；32、第四密封件；33、连接体；34、弹性件；35、气门芯；200、制冷***。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明的是，当组件被称为“装设于”另一个组件，它可以直接在另一个组件上或者也可以存在居中的组件。当一个组件被认为是“设置于”另一个组件，它可以是直接设置在另一个组件上或者可能同时存在居中组件。当一个组件被认为是“固定于”另一个组件，它可以是直接固定在另一个组件上或者可能同时存在居中组件。
除非另有定义，本文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。本文中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例的目的，不是旨在于限制本申请。本文所使用的术语“或/及”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5，此种截止阀100安装于制冷***200中，用于实现管道的连通和截断。
截止阀100包括阀体10和阀芯20，阀体10与阀芯20连接。阀体10的内部中空，用于容纳阀芯20等部件；至少一部分阀芯20设于阀体10内部，并能够沿着阀体10轴向移动。
阀体10上还设置有第一开口11和第二开口13。第一开口11远离阀体 10的一侧连接有第一连通管12，第一开口11通过第一连通管12与外界连通；第二开口13远离阀体10的一侧连接有第二连通管14，第二开口13通过第二连通管14与外界连通。第一连通管12和第二连通管14分别作为介质的进口或出口。当第一连通管12作为介质的进口时，介质从第一连通管12进入截止阀100，通过第一开口11进入阀体10内部，若截止阀100呈开启状态，则介质通过第二开口13，经由第二连通管14流出截止阀100。反之亦然，介质也可以从第二连通管14经由第二开口13进入阀体10，再通过第一开口11和第一连通管12流出截止阀100。
阀体10还包括端盖15和阀座16，端盖15位于阀体10的最顶端，与阀芯20配合密封住阀体10，以此防止外界灰尘和粉末等杂质进入阀体10内部，影响截止阀100开关阀的密封性和阀体10内介质的纯度，以及防止影响截止阀100其他相关功能的实现。
可选地，端盖15也可以设置于阀体10的内部，即，端盖15的外周侧抵接于阀体10的内周侧，端盖15的内周侧与阀芯20的外周侧抵接，如此设置，端盖15与阀芯20配合也同样可以起到密封住阀体10的作用。端盖15的位置不限于本实施例中所述的方案，只需能够实现上述功能即可。
阀座16设于阀体10内，用于与阀芯20抵接配合，以实现阀体10内部的连通或隔断。在本实施例中，阀座16设于第一开口11处，在其他实施例中，阀座16还可设于第一开口11和第二开口13之间。
具体地，在本实施例中，阀座16上开设有阀口161，阀口161与第一开口11连通，共同形成介质流入或者流出的通道。阀芯20的轴向运动可以封堵或打开阀口161，从而实现对介质的截断。可选地，在本实施例中，阀座16与阀体10分体设置，以降低加工的难度。可选地，在其他实施例中，阀座 16也可以由阀体10直接形成，阀口161也可以直接开设于阀体10上。
请参见图1-图3，阀芯20朝向阀口161的一侧开设有第一凹槽22，第一凹槽22内嵌设有第一密封件221，第一密封件221和第一凹槽22过盈配合。第一密封件221能够提高阀芯20与阀座16之间的密封性能，并且由于第一密封件221自身形变产生的挤压力，第一密封件221和第一凹槽22互相受到彼此的支撑力，从而实现固定限位，避免第一密封件221从第一凹槽22中脱落，影响截止阀100的密封性能。
具体地，第一密封件221与阀芯20的硬度不同，通过两者材质和硬度的差异，硬度较小的一方会产生更大形变，以增强两者的限位强度，防止双方因为材质和硬度相同，在过盈配合的过程中，发生破裂。
进一步地，第一密封件221的硬度小于阀芯20的硬度，从而使第一密封件221更容易嵌设入第一凹槽22中，并且第一密封件221与阀座16的抵接可以更加紧密。
在本实施例中，第一凹槽22的内壁设有限位部222，限位部222能够对第一密封件221进行限位，限位部222可以进一步将第一密封件221限位于第一凹槽22中，防止其脱落。
具体地，第一凹槽22的槽宽沿着靠近阀口161的方向逐渐减小，以此形成限位部222。第一凹槽22的槽口的大小小于第一凹槽22的槽身和槽底的大小，则第一密封件221更不易从第一凹槽22的槽口中掉出，而通过第一凹槽22的槽宽来对第一密封件221进行限位，结构简单，无需设置额外的部件。
更进一步地，第一凹槽22的靠近阀芯20外周侧的内壁沿着朝向阀口161的方向逐渐靠近阀芯20的中轴线，以此形成倾斜面22A，倾斜面22A即为限位部222。当然，在其他实施例中，也可以设置第一凹槽22的靠近阀芯20中 轴线的内壁沿着朝向阀口161的方向逐渐远离阀芯20的中轴线，以此形成倾斜面22A作为限位部222，限位部222的形成方式并不限于本实施例所述的形成方式。
倾斜面22A和阀芯20的中轴线的夹角α为1°-10°，既保证了限位部222对于第一密封件221的限位牢固度，避免其从第一凹槽22中脱落，又防止第一凹槽22的槽口过小，而导致第一密封件221难以塞入第一凹槽22中，或塞入的过程中造成第一密封件221或第一凹槽22受损。
可以理解地，倾斜面22A和阀芯20的中轴线的夹角α度数为1°、2°、3°、4°、5°、6°、7°、8°、9°、10°，也可以为1.5°、2.5°等，上述夹角α度数只需在1°-10°的范围内，不限于整数。
在本实施例中，第一凹槽22为环形凹槽，第一密封件221为密封圈，从而尽可能增大了第一凹槽22和第一密封件221的接触面积，使第一凹槽22和第一密封件221的配合更为紧密，同时密封圈与阀座16的接触面积也更大，并且密封圈能够对应阀口161的形状，实现各个方向的密封，进一步增强阀芯密封效果。
密封圈为紫铜材质，可以在保证强度的同时具备一定的柔软性，从而受压形变增强密封性能。
阀芯20包括操作部21、引导部23及连接部26，连接部26连接操作部21和引导部23。操作部21位于连接部26远离阀座16的一端，操作部21的一端伸出端盖15。引导部23位于连接部26靠近阀座16的一端，能够引导阀芯20进入阀口161。
操作部21伸出端盖15的上端面，易于加工和拆卸。操作部21设置为上端开口的空心结构，多个平面间隔均匀分布在操作部21的内表面，以此可以 适配内六角扳手等工具。在其他实施方式中，操作部21内表面的平面也可以设置为不间隔均匀分布，以适用于不规则形状的扳手。
操作部21的外周侧设有第一螺纹段211，端盖15的内表面设有第二螺纹段151，第二螺纹段151和第一螺纹段211配合使阀芯20作轴向运动。
阀芯20的外侧壁抵接于阀体10的内壁，使阀芯20可以沿阀体10内壁轴向运动。连接部26的直径大于操作部21的直径，使得连接部26与操作部21之间形成台阶，台阶上设有第二密封件24，第二密封件24能够抵接于端盖15靠近所述阀芯20的一侧。当阀芯20朝端盖15方向运动到极限位置，即上述第二密封件24抵接住端盖15时，第二密封件24能够起到缓冲作用，并且增强两者间的密封性。
阀芯20靠近操作部21的一端还设有第三密封件25，第三密封件25周向环绕于阀芯20的外周侧，第三密封件25的外周侧沿周向抵接于阀体10的内壁，以此密封阀体10，使介质在第一开口11和第二开口13的流通过程中不会泄漏。在其他实施例中，第三密封件25还可替换为密封垫等同样可以起到密封作用的部件。
引导部23位于所述阀芯20靠近第一开口11的端部，用于引导阀芯20***阀口161内，以实现阀芯20和阀口161的密封配合。
引导部23上设有导向段231，在本实施例中，导向段231为圆弧形状倒角，便于阀芯20***阀口161中，防止阀芯20与阀口161产生碰撞和干涉，无法顺利实现开关阀的动作。
此外，截止阀100还包括气门组件30，气门组件30连接于阀体10。在本实施例中，气门组件30与第二开口13相对设置，作为充气入口或放气出口，用于给整个制冷***200补充介质或释放介质。在其他实施例中，气门 组件30的轴线还可与第二开口13的轴线垂直设置，气门组件30还可设于阀体10的其他位置。
气门组件30包括连接体33，连接体33连接于阀体10，连接体33作为介质通入或流出阀体10的通道。
气门组件30还包括气门芯35、罩壳31和第四密封件32。气门芯35设于连接体33内，能够使得阀体10的内部与连接体33的内部连通或隔断，罩壳31套设在连接体33的外周侧，用于保护气门芯35，防止外界杂质进入；第四密封件32位于罩壳31和连接体33之间，与罩壳31配合密封住连接体33。
具体地，气门芯35的一端设有弹性件34，当气门芯35未受到外界压力时，会保持关闭状态，此时，连接体33保持密封，阻隔阀体10内部与外界。当气门芯35受到压力时，气门芯35挤压弹性件34，并朝向靠近阀体10的方向运动，从而解除封堵，使得阀体10内部与连接体33的内部连通，从而使介质可以通入阀体10内部或流出阀体10内部。弹性件34用于气门芯35的复位。
如图5所示，本申请还提供一种制冷***200，包括上述的截止阀100，截止阀100安装于制冷***200的介质通路中，以控制介质通路的截断和流通，并且用于向制冷***200补充介质。
在本实施例的截止阀100的工作过程中，当截止阀100需要关阀时，拧动截止阀100顶部的操作部21，操作部21与阀芯20同步旋转，通过第一螺纹段211和第二螺纹段151的配合，带动阀芯20相对端盖15作轴向运动，从而使阀芯20底端的引导部23***阀口161，第一密封件221与阀座16抵接，密封住第一连通管12，以此实现第一连通管12和第二连通管14之间的 截断。
相较于相关技术，本申请通过第一密封件221提高阀芯20与阀座16之间的密封性能，并且由于第一密封件221自身形变产生的挤压力，第一密封件221和第一凹槽22互相受到彼此的支撑力，从而实现固定限位，避免第一密封件221从第一凹槽22中脱落，影响截止阀100的密封性能。
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实用新型专利范围的限制。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 (11)

  1. 一种截止阀，其特征在于，包括:
    阀体，所述阀体设有阀口；
    阀芯，至少部分所述阀芯设置在所述阀体内，并能够沿着所述阀体的轴向移动，以封堵或打开所述阀口；
    所述阀芯朝向所述阀口的一侧开设有第一凹槽，所述第一凹槽内嵌设有第一密封件，所述第一密封件与所述第一凹槽过盈配合，所述第一凹槽的内壁设有限位部，所述限位部能够对第一密封件进行限位。
  2. 根据权利要求1所述的截止阀，其中，所述阀体包括端盖和阀座，所述端盖位于所述阀体的最顶端或设置于所述阀体的内部，所述端盖与所述阀芯配合密封住所述阀体；
    所述阀座设于所述阀体内，所述阀座形成所述阀口，所述第一密封件能够与所述阀座形成所述阀口的周侧壁抵接，以封堵所述阀口。
  3. 根据权利要求2所述的截止阀，其中，所述第一密封件的硬度小于所述阀芯，所述第一凹槽为环形凹槽，所述第一密封件为密封圈，所述密封圈为紫铜材质。
  4. 根据权利要求1-3任一项所述的截止阀，其中，所述第一凹槽的槽宽沿靠近所述阀口的方向逐渐减小，以此形成所述限位部。
  5. 根据权利要求4所述的截止阀，其中，所述第一凹槽靠近所述阀芯外周侧的内壁，沿着朝向所述阀口的方向，逐渐靠近所述阀芯的中轴线，以此形成倾斜面，所述倾斜面为所述限位部。
  6. 根据权利要求4所述的截止阀，其中，所述第一凹槽靠近所述阀芯中轴 线的内壁，沿着朝向所述阀口的方向，逐渐远离所述阀芯的中轴线，以此形成倾斜面，所述倾斜面为所述限位部。
  7. 根据权利要求5所述的截止阀，其中，所述限位部与所述阀芯的中轴线的夹角α度数为1°-10°。
  8. 根据权利要求1-3任一项所述的截止阀，其中，所述阀芯朝向所述阀口的一端设有引导部，所述引导部能够引导阀芯进入所述阀口，所述第一密封件套设于所述引导部外侧；
    所述引导部上设有导向段，所述导向段为圆弧形状倒角。
  9. 根据权利要求2所述的截止阀，其中，所述阀芯设有操作部和连接部，所述操作部连接于所述连接部远离所述阀座的一端，所述连接部的直径大于所述操作部的直径，所述连接部与所述操作部之间形成台阶，所述台阶上设有第二密封件，所述第二密封件与所述端盖靠近所述阀芯的一侧抵接。
  10. 根据权利要求9所述的截止阀，其中，所述连接部上设置有第三密封件，所述第三密封件周向环绕于所述连接部的外周侧，所述第三密封件的外周侧周向抵接于所述阀体的内壁，以此密封所述阀体。
  11. 一种制冷***，其特征在于，包括如权利要求1-10所述的截止阀。
PCT/CN2023/072346 2022-01-27 2023-01-16 截止阀及具有其的制冷*** WO2023143180A1 (zh)

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CN216742879U (zh) * 2022-01-27 2022-06-14 浙江盾安人工环境股份有限公司 截止阀及其制冷***
WO2024001898A1 (zh) * 2022-06-30 2024-01-04 浙江盾安人工环境股份有限公司 截止阀

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