WO2022012303A1 - 截止阀 - Google Patents

截止阀 Download PDF

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Publication number
WO2022012303A1
WO2022012303A1 PCT/CN2021/102387 CN2021102387W WO2022012303A1 WO 2022012303 A1 WO2022012303 A1 WO 2022012303A1 CN 2021102387 W CN2021102387 W CN 2021102387W WO 2022012303 A1 WO2022012303 A1 WO 2022012303A1
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WO
WIPO (PCT)
Prior art keywords
valve
valve core
flow port
diameter end
core
Prior art date
Application number
PCT/CN2021/102387
Other languages
English (en)
French (fr)
Inventor
寿杰
冯雄雄
谭震宇
陈狄永
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
Priority to JP2022570679A priority Critical patent/JP2023533126A/ja
Publication of WO2022012303A1 publication Critical patent/WO2022012303A1/zh

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    • 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
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves

Definitions

  • the present application relates to the technical field of air conditioners, and in particular, to a shut-off valve.
  • the globe valve is an important part of the air conditioning system, which plays the role of connecting the outdoor unit of the air conditioner with the indoor unit of the air conditioner, closing or opening the refrigeration circuit, vacuuming or charging the refrigerant;
  • the globe valve is a kind of on-off valve, its main function is It is to control the flow rate of the medium by changing the opening of the valve core, so as to control the change of the pressure of the second fluid at the flow port of the valve body.
  • the shut-off valve of the related art includes the valve body, the valve core, the first pipe of the circulation port and the second pipe of the circulation port, etc., wherein the globe valve is connected to the pipes of the indoor unit of the air conditioner and the outdoor unit of the air conditioner through the second pipe of the circulation port and the first pipe of the circulation port, respectively. connect. Because the valve body and the valve core are not sealed in place, it is easy to cause the problem of high leakage rate of the globe valve.
  • a globe valve provided by the present application includes a valve body, a valve core and a valve seat, the valve body has a valve cavity, and the valve body is provided with a flow port respectively communicating with the valve cavity and flow port two, the valve core is arranged inside the valve cavity and can move in the valve cavity to control the on/off between the flow port one and the flow port two; the valve One end of the core has a conical sealing surface, the conical sealing surface can be in contact with or away from the valve seat with the movement of the valve core, and the angle ⁇ of the cone apex angle of the conical sealing surface is in the range of 30° ⁇ 60°.
  • the sealing force point of the valve core moves up, which can reduce the tightening torque when closing the globe valve.
  • the degree of the valve core sliding into the valve seat is deepened.
  • the conical sealing surface can fit more closely with the valve seat, and the cone apex angle ⁇ of the conical sealing surface can make the sealing load of the valve core increase within this range, and the conical
  • the elastic-plastic deformation of the sealing surface will also increase, thereby improving the sealing performance of the product and reducing the leakage rate; in addition, due to the lengthening of the conical sealing surface, the throttling characteristics of the valve can also be improved.
  • one end of the valve core close to the valve seat is provided with a conical section, the conical section has a large diameter end and a small diameter end arranged oppositely, and the large diameter end is close to the valve core
  • the outer diameter of the large diameter end is smaller than or equal to the outer diameter of the valve core, and the outer surface of the conical section forms the conical sealing surface.
  • the configuration of the conical sealing surface enhances the sealing performance between the valve core and the valve seat and reduces the leakage rate.
  • the end surface of the small diameter end has a sink groove, and the depth of the sink groove extends from the small diameter end to the large diameter end to the valve core; the sink groove is at the large diameter end.
  • the thickness of the groove wall at the end is B1
  • the setting of the sink groove reduces the mass of the valve core, thereby reducing the friction force between the valve core and the valve seat, thereby reducing the wear of the valve core;
  • the elastic performance of the valve core can be increased, and the conical sealing surface can fit more closely with the valve seat, thereby improving the sealing performance of the product and reducing the leakage rate; and because part of the material is removed, the reduction is reduced.
  • the weight of the spool thereby reducing material costs.
  • one end of the valve body away from the flow port 1 is provided with a first installation hole communicating with the valve cavity, and the end of the valve core away from the conical sealing surface extends into the The first installation hole is slidably connected with the valve body.
  • valve core maintains a high coaxial precision while sliding in the valve body, and plays a guiding role.
  • the shut-off valve further includes a first bonnet, the first bonnet is located at an end of the valve body away from the first flow port, and covers the first installation hole.
  • the bonnet has the functions of dustproof and waterproof for the shut-off valve.
  • a connecting hole is formed at one end of the valve core away from the sink, and the connecting hole is used to cooperate with an external tool to control the movement of the valve core.
  • shut-off valve works, screw the external tool into the connecting hole, turn the external tool clockwise, the valve body is closed, and the circulation of the internal medium is cut off; when the external tool is rotated counterclockwise, the valve body Open, open the circulation of the internal medium, so as to realize the control of the internal medium.
  • the outer diameter of the large diameter end is smaller than the outer diameter of the valve core, so that a first step is formed between the valve core and the tapered section.
  • valve core is more easily deformed, thereby forming a better seal with the valve seat.
  • valve body and the valve seat are integrally or separately provided.
  • a limit ring is provided in the first installation hole, and as the valve core moves away from the valve seat in the valve cavity, the limit ring can abut against the valve core Depend on.
  • the valve core may be screwed out together when the valve core is unscrewed.
  • the limiting ring can be set to In this case, the spool is prevented from being unscrewed by an external tool.
  • the shut-off valve further comprises a flow port, a nozzle, the inner wall of the flow port is provided with a second step, and one end of the valve seat extends into the flow port one, and is connected with the second flow port. Step against.
  • This arrangement can limit the relative position of the first flow port and the valve seat.
  • the shut-off valve further includes a flow port, a nozzle, and a third step is further provided on the inner wall of the valve seat. The third step abuts.
  • the arrangement is such that the shut-off valve is connected to the corresponding components in the air-conditioning system through the flow port-connector, so that the medium flows into the shut-off valve through the flow-port-connector, and the third step can prevent the A nozzle of the flow port overextends into the valve seat.
  • the degree of sliding of the valve core into the valve seat becomes deeper, and the conical sealing surface can fit more closely with the valve seat, and as the cone The cone apex angle of the conical sealing surface is reduced, the sealing load of the valve core will increase, and the elastic-plastic deformation of the conical sealing surface will also increase, so as to better prevent the medium from leaking along the gap between the conical sealing surfaces and reduce the The closing torque when closing the globe valve is improved, and the sealing performance of the globe valve is improved.
  • Fig. 1 is the front view structure schematic diagram of the shut-off valve provided by this application;
  • FIG. 2 is a left-view structural schematic diagram of the globe valve provided by the application.
  • FIG. 3 is a schematic diagram of the valve core structure of the globe valve in FIG. 1 .
  • valve body 100, globe valve; 10, valve body; 11, valve cavity; 111, first installation hole; 112, second installation hole; 12, flow port one; 121, flow port one takeover; 13, flow port two; 131, Two nozzles for flow port; 20, valve core; 21, conical section; 211, conical sealing surface; 212, large diameter end; 213, small diameter end; 22, sinking groove; 23, connecting hole; 24, first step; 30, valve seat; 31, second step; 32, third step; 40, limit ring; 50, first valve cap; 60, valve core; 70, second valve cap.
  • a component when referred to as being “mounted on” another component, it can be directly on the other component or there may also be an intervening component.
  • a component When a component is considered to be “set on” another component, it may be directly set on the other component or there may be a co-existing centered component.
  • 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 also be an intervening component.
  • the present application provides a shut-off valve.
  • the shut-off valve is installed between the indoor unit and the outdoor unit of the air-conditioning system. It is used to open or close the refrigerant circuit, and can also be used for vacuuming during air-conditioning maintenance. or charge refrigerant.
  • the shut-off valve can also be applied in fields other than air conditioning systems, such as fluid pipeline transportation, petrochemical industry, and aerospace fields.
  • the globe valve includes a valve body 10 , a valve core 20 and a valve seat 30 .
  • the valve body 10 has a valve cavity 11 , and the valve body 10 is provided with a flow port 12 respectively communicating with the valve cavity 11 .
  • the valve core 20 is arranged inside the valve cavity 11, and can move in the valve cavity 11 to control the on/off between the flow port one 12 and the flow port two 13; one end of the valve core 20 has a cone
  • the conical sealing surface 211 can contact or move away from the valve seat 30 with the movement of the valve core 20 , and the angle ⁇ of the cone apex angle of the conical sealing surface 211 ranges from 30° to 60°.
  • the angle ⁇ of the cone apex angle of the conical sealing surface 211 ranges from 35° to 45°, that is, the angle ⁇ of the cone apex angle of the conical sealing surface 211 can be 35°, 37°, 39°, 41°, 43° or 45°.
  • the angle ⁇ of the cone apex angle of the conical sealing surface 211 may also be other degrees, which will not be illustrated here. This can reduce the tightening torque when the globe valve 100 is closed, so that the degree of sliding of the valve core 20 into the valve seat 30 is deepened, the sealing load of the valve core 20 will increase, and the elastic-plastic deformation of the conical sealing surface 211 will also increase.
  • the throttling characteristics of the globe valve 100 can also be improved.
  • the valve body 10 is a main component in the valve. Different pressure levels have different mechanical manufacturing methods.
  • the valve body 10 is produced by a casting process.
  • the valve body 10 is also It can be produced by forging or other methods.
  • valve body 10 is made of metal, which is suitable for medium and low pressure and normal temperature conditions in water treatment, light industry, petroleum, chemical and other industries, and has good sealing performance.
  • valve cavity 11 is located inside the valve body 10 for mutual communication between media; the valve body 10 also has a first installation hole 111 and a second installation hole 112 communicating with the valve cavity 11 , wherein the first installation hole 111 and the second installation hole 112
  • a mounting hole 111 is located at one end of the valve body 10 away from the flow port one 12 and communicates with the valve cavity 11.
  • the second mounting hole 112 is an internal thread hole.
  • the first mounting hole 111 and the second mounting hole 112 are vertically arranged for connecting The components in valve 100 are matingly connected.
  • valve body 10 is provided with a flow port one 12 and a flow port two 13 respectively communicating with the valve cavity 11.
  • the flow port one 12 and the flow port two 13 are vertically arranged for the inflow/outflow of the internal medium.
  • the position of the installation hole 111 on the valve body 10 is opposite to the position of the flow port 1 12 on the valve body 10
  • the position of the second installation hole 112 on the valve body 10 is opposite to the position of the flow port 2 13 on the valve body 10 set up.
  • the globe valve 100 further includes a flow port 12 and a flow port 2 13.
  • the flow port 12 is installed at the first flow port 12, and the flow port 2 13 is installed at the flow port 2 13.
  • the cut-off valve 100 is mainly connected to the corresponding components in the air-conditioning system through the first flow port 12 and the second flow port 13, so that the medium flows into/out of the cut-off valve 100 through the first flow port 12 and the second flow port 13.
  • the globe valve 100 includes a valve core 20 and a valve seat 30 .
  • One end of the valve core 20 close to the valve seat 30 is provided with a conical section 21
  • the conical section 21 has a large diameter end 212 and a small diameter end 213 arranged oppositely.
  • the large diameter end 212 is arranged close to the valve core 20, and the outer diameter of the large diameter end 212 is smaller than or equal to the outer diameter of the valve core 20, so that a first step 24 is formed between the valve core 20 and the tapered section 21, and the tapered section
  • the outer surface of 21 forms a conical sealing surface 211.
  • the setting of the conical sealing surface 211 can enhance the sealing performance between the valve core 20 and the valve seat 30 and reduce the leakage rate; the conical sealing surface 211 can move with the valve core 20. In contact with the valve seat 30, the conical sealing surface 211 abuts against the inner wall of the valve seat 30 at one end near the valve core 20 to form a sealing pair.
  • the end face of the small diameter end 213 has a sinking groove 22 , and the sinking groove 22 reduces the mass of the valve core 20 , thereby reducing the friction force between the valve core 20 and the valve seat 30 , thereby reducing the wear of the valve core 20
  • the thickness B1 of the groove wall of the groove 22 at the large diameter end 212 may be 0.7 times, 0.75 times, 0.8 times, 0.85 times, 0.9 times, 0.95 times or 1.0 times of the groove wall thickness B2 of the sink groove 22 at the valve core 20;
  • the thickness B1 of the groove wall of the sink groove 22 at the large diameter end 212 may be other multiples of the thickness B2 of the groove wall of the sink groove 22 at the valve core 20 , which will not be illustrated here.
  • the elastic performance of the valve core 20 can be increased, and the conical sealing surface 211 can be more closely fitted with the valve seat 30, thereby improving the sealing performance of the product and reducing the leakage rate; and because some materials are removed, the weight is reduced , thereby reducing material costs.
  • the valve core 20 can be divided into a plane type, a cone type, a spherical type, a knife type and the like according to the form of the sealing surface.
  • the sealing surface can be selected as a conical surface structure. Compared with other types, the sealing surface angle of the conical surface structure is smaller, and the sealing surface area is larger.
  • the valve core 20 The degree of sliding into the valve body 10 is deeper, and it is not easy to be damaged by erosion, and the throttling characteristic of the globe valve 100 can also be improved due to the longer conical surface.
  • valve core 20 away from the conical sealing surface 211 protrudes into the first installation hole 111 and is slidably connected with the valve body 10 .
  • the guidance of the movement in the cavity 11 makes the movement of the valve core 20 more precise.
  • One end of the valve core 20 away from the sink groove 22 is provided with a connecting hole 23 , and the connecting hole 23 is used to cooperate with an external tool to control the movement of the valve core 20 to open or close the stop valve 100 .
  • a valve stem (not shown) can be used as the external tool matched with the connection hole 23 .
  • the external tool can be any tool that can be matched with the connection hole 23 and manipulated the valve core 20 .
  • the inner wall of the connection hole 23 has an inner thread (not shown), and the outer wall of the valve stem has an outer thread, and the outer thread and the inner thread are threadedly connected to realize the connection between the valve stem and the valve core 20 .
  • valve stem drives the valve core 20 to closely fit the valve seat 30, the valve body 10 is closed, and the circulation of the internal medium is cut off;
  • valve stem drives the valve core 20 to separate from the valve seat 30, the valve body 10 opens, and the circulation of the internal medium is opened, thereby realizing the control of the internal medium.
  • the inner wall of the flow port 12 is provided with a second step 31, and one end of the valve seat 30 extends into the flow port 12, and abuts against the second step 31, so as to make the valve seat 30 relative to the flow port one.
  • the position of 12 is limited.
  • the inner wall of the valve seat 30 is also provided with a third step 32, and one end of the take-over of the flow port 12 extends into the valve seat 30 and abuts against the third step 32 to prevent the take-over of the flow port 12 from extending into the valve excessively.
  • the seat 30 In the seat 30; of course, it can also play the role of installing and positioning the nozzle of the flow port 12.
  • valve seat 30 is fixed to the flow port one 12 by welding, and the welding method can enhance the firmness between the valve seat 30 and the flow port one 12, which simplifies the process.
  • the welding method can be selected by laser welding.
  • the valve seat 30 and the flow port one 12 can also be fixed together by means of interference fit.
  • both the valve core 20 and the valve seat 30 are made of metal, that is, a hard seal is used between the valve core 20 and the valve seat 30, and the hard seal is mostly used for heating, gas, gas, and oil products. , acid-base and other environments, which can make the sealing performance between the valve seat 30 and the valve core 20 more stable.
  • both the valve seat 30 and the valve core 20 are made of copper, steel or copper alloy.
  • the first installation hole 111 is further provided with a limit ring 40 , and the limit ring 40 is placed inside the valve body 10 at one end away from the valve core 20 .
  • the valve stem is screwed into the connection hole 23 to control the valve core 20 .
  • the valve core 20 may be unscrewed together.
  • the limiting ring 40 is provided to prevent the valve core 20 from being unscrewed together under the driving of the valve stem. play a limiting role.
  • the globe valve 100 further includes a first bonnet 50.
  • the first bonnet 50 is located at the end of the valve body 10 away from the flow port 12, and covers the first installation hole 111 to avoid dust,
  • the rainwater enters the valve cavity 11 from the first installation hole 111 , that is, by arranging the first valve cap 50 , the functions of dustproof and waterproof to the globe valve 100 are realized.
  • first valve cap 50 and the valve body 10 are connected by screws, so as to realize the quick disassembly/assembly of the first valve cap 50, so as to facilitate the rapid operation of the valve core 20 by the valve stem.
  • first valve cap 50 and the valve body 10 may also be connected by other means than screw connection, such as snap connection and the like.
  • the shut-off valve 100 further includes a valve core 60 , which is installed in the second mounting hole 112 and used to charge the valve cavity 11 with refrigerant, so that when the refrigerant needs to be charged , the refrigerant can be charged into the refrigeration system of the air conditioning system through the valve core 60 and the valve nozzle.
  • the position of the second installation hole 112 can also be set at other positions on the valve body 10, as long as the valve core 60 can be installed, and the valve cavity 11 can be filled with refrigeration through the valve core 60 agent can be.
  • valve core 60 and the inner wall of the second installation hole 112 are sealedly connected to prevent the refrigerant in the valve cavity 11 from leaking out of the second installation hole 112 .
  • the stop valve 100 further includes a second valve cap 70 , which is covered at the second installation hole 112 and connected to the valve body 10 to prevent dust and rainwater from entering the second installation hole 112 .
  • the second valve cap 70 and the valve body 10 are connected by sealing, so as to further prevent dust and rainwater from entering the first installation hole 111 .
  • the shut-off valve 100 provided by the present application mainly drives the valve core 20 to move vertically downward by unscrewing the first valve cap 50 and screwing the valve stem into the connecting hole 23 to cooperate with the connecting hole 23. Since the conical sealing surface of the valve core 20 The angle ⁇ of the cone apex angle of 211 is in the range of 35° to 45°, so when the valve core 20 is tightened and the sealing load increases, the degree of the valve core 20 sliding into the valve seat 30 is deepened, and the conical sealing surface 211 can be connected to the valve.
  • the seat 30 fits more closely, and the cone apex angle of the conical sealing surface 211 is within this range, the sealing load of the valve core 20 will increase, and the elastic-plastic deformation of the conical sealing surface will also increase, thereby improving the sealing of the product. performance, reduce the leakage rate, solve the problem of high leakage rate due to poor concentricity of the valve body 10, the valve core 20 and the valve seat 30, and improve the sealing performance of the globe valve 100.

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

Abstract

一种截止阀，包括阀体(10)、阀芯(20)以及阀座(30)，阀体(10)内具有阀腔(11)，阀体(10)开设有分别与阀腔(11)连通的流通口一(12)和流通口二(13)，阀芯(20)设于阀腔(11)内部，并能够在阀腔(11)内运动，以控制流通口一(12)和流通口二(13)之间的通/断；阀芯(20)的一端具有锥形密封面(211)，锥形密封面(211)能够随阀芯(20)运动与阀座(30)接触或远离，锥形密封面(211)的锥顶角的角度α的范围为30°～60°。

Description

截止阀
相关申请
本申请要求2020年7月15日申请的，申请号为202021394927.5，发明名称为“截止阀”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
本申请涉及空调技术领域，特别是涉及截止阀。
背景技术
截止阀是空调系统的一个重要部件，起到空调室外机与空调室内机的相连、关闭或开启制冷回路、抽真空或充注制冷剂的作用；截止阀作为一种通断阀，其功能主要是依靠改变阀芯的开度控制介质流量大小，从而起到控制阀体流通口二流体压力变化的作用。
相关技术的截止阀，包括阀体、阀芯、流通口一接管和流通口二接管等，其中，截止阀通过流通口二接管与流通口一接管分别与空调室内机以及空调室外机的管道相连接。由于阀体与阀芯密封不到位容易导致截止阀的泄漏率高的问题。
发明内容
为了解决上述问题，本申请提供了一种截止阀，技术方案如下：
与相关技术相比，本申请提供的一种截止阀，包括阀体、阀芯以及阀座，所述阀体内具有阀腔，所述阀体开设有分别与所述阀腔连通的流通口一和流通口二，所述阀芯设于所述阀腔内部，并能够在所述阀腔内运动，以控制所述流通口一和所述流通口二之间的通/断；所述阀芯的一端具有锥形密封面，所述锥形密封面能够随所述阀芯运动与所述阀座接触或远离，所述锥形密封面的锥顶角的角度α的范围为30°～60°。
如此设置，阀芯的密封受力点上移，可以降低关闭该截止阀时的关紧力矩，当拧紧所述阀芯，密封负荷增大时，所述阀芯滑入所述阀座的程度加深，所述锥形密封面能与所述阀座更加紧密契合，而且所述锥形密封面的锥顶角α在该范围内可以使得所述阀芯的密封载荷会变大，所述锥形密封面发生的弹塑性变形也会增大，从而提升产品的密封性能，降低泄漏率；除此之外，由于所述锥形密封面变长，也可以使得阀门的节流特性得到改善。
在其中一个实施例中，所述阀芯靠近所述阀座的一端设有锥形段，所述锥形段具有相 对设置的大径端和小径端，所述大径端靠近所述阀芯设置，且所述大径端的外径小于或等于所述阀芯的外径，所述锥形段的外表面形成所述锥形密封面。
如此设置，所述锥形密封面的设置使得所述阀芯和所述阀座之间的密封性能得到增强，降低泄漏率。
在其中一个实施例中，所述小径端的端面具有沉槽，所述沉槽的深度从所述小径端至所述大径端方向延伸至所述阀芯；所述沉槽在所述大径端处的槽壁厚度为B1，所述沉槽在所述阀芯处的槽壁厚度为B2，且B1＝(0.5～1)B2。
如此设置，所述沉槽的设置使得所述阀芯的质量得到减轻，从而减少所述阀芯与所述阀座之间的摩擦力，进而降低所述阀芯的磨损；槽壁厚度在该范围内可以使得所述阀芯的弹性性能得到增加，所述锥形密封面能与所述阀座更加紧密契合，从而提升产品的密封性能，降低泄漏率；而且因为去除了部分材料，降低了所述阀芯的重量，从而降低了材料成本。
在其中一个实施例中，所述阀体远离所述流通口一的一端开设有与所述阀腔连通的第一安装孔，所述阀芯远离所述锥形密封面的一端伸入所述第一安装孔内并与所述阀体滑动连接。
如此设置，使得所述阀芯在所述阀体中滑动的同时保持较高的同轴精度，起到导向的作用。
在其中一个实施例中，所述截止阀还包括第一阀帽，所述第一阀帽位于所述阀体远离所述流通口一的一端，并将所述第一安装孔覆盖。
所述阀帽对于所述截止阀具有防尘和防水的作用。
在其中一个实施例中，所述阀芯远离所述沉槽的一端开设有连接孔，所述连接孔用于配合外部工具，以控制所述阀芯运动。
如此设置，当所述截止阀工作时，将外部工具旋入所述连接孔中，顺时针转动外部工具，所述阀体关闭，切断内部介质的流通；逆时针转动外部工具，所述阀体打开，开启内部介质的流通，从而实现对内部介质的操控。
在其中一个实施例中，所述大径端的外径小于所述阀芯的外径，以使所述阀芯与所述锥形段之间形成第一台阶。
如此设置，使得阀芯更容易实现变形，从而与阀座形成较好的密封。
在其中一个实施例中，所述阀体与所述阀座一体或分体设置。
在其中一个实施例中，所述第一安装孔内设有限位环，随着所述阀芯在所述阀腔内远离所述阀座运动，所述限位环能够与所述阀芯抵靠。
如此设置，当外部工具旋入所述连接孔操控阀芯结束后，旋出所述阀芯时可能会将所述阀芯一并旋出，为避免这种情况，设置所述限位环可以防止在这种情况下所述阀芯在外部工具的带动下一并被旋出。
在其中一个实施例中，所述截止阀还包括流通口一接管，所述流通口一内壁设有第二台阶，所述阀座的一端伸入所述流通口一，并与所述第二台阶抵靠。
如此设置，对所述流通口一和所述阀座的相对位置起到限位作用。
在其中一个实施例中，所述截止阀还包括流通口一接管，所述阀座的内壁上还设有第三台阶，所述流通口一接管的一端伸入所述阀座内，并与所述第三台阶抵靠。
如此设置，以便于所述截止阀通过所述流通口一接管与空调系统中的对应部件连接，使得介质通过所述流通口一接管流入所述截止阀内，所述第三台阶可以阻止所述流通口一接管过度伸入所述阀座内。
与相关技术相比，本申请提供的截止阀，当拧紧阀芯，密封负荷增大时，阀芯滑入阀座的程度加深，锥形密封面能与阀座更加紧密契合，而且随着锥形密封面的锥顶角减少，阀芯的密封载荷会变大，锥形密封面发生的弹塑性变形也会增大，从而更好的阻止介质沿锥形密封面之间的缝隙泄漏，降低了关闭截止阀时的关阀力矩，提高了截止阀的密封性能。
附图说明
图1为本申请提供的截止阀的主视结构示意图；
图2为本申请提供的截止阀的左视结构示意图；
图3为图1中截止阀的阀芯结构示意图。
图中各符号表示含义如下：
100、截止阀；10、阀体；11、阀腔；111、第一安装孔；112、第二安装孔；12、流通口一；121、流通口一接管；13、流通口二；131、流通口二接管；20、阀芯；21、锥形段；211、锥形密封面；212、大径端；213、小径端；22、沉槽；23、连接孔；24、第一台阶；30、阀座；31、第二台阶；32、第三台阶；40、限位环；50、第一阀帽；60、气门芯；70、第二阀帽。
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。
请参考图1至图3，本申请提供一种截止阀，该截止阀设于空调系统的室内机和室外机之间，用于开启或关闭制冷剂回路，也可以用于空调维修时抽真空或充注制冷剂。当然，在其他实施例中，截止阀还可以应用除空调系统以外的领域中，例如流体管道输送、石油化工行业和航空航天领域等。
如图1和图2所示，该截止阀包括阀体10、阀芯20以及阀座30，阀体10内具有阀腔11，阀体10开设有分别与阀腔11连通的流通口一12和流通口二13，阀芯20设于阀腔11内部，并能够在阀腔11内运动，以控制流通口一12和流通口二13之间的通/断；阀芯20的一端具有锥形密封面211，锥形密封面211能够随阀芯20运动与阀座30接触或远离，锥形密封面211的锥顶角的角度α的范围为30°～60°。
作为可选地，锥形密封面211的锥顶角的角度α的范围为35°～45°，也就是说，锥形密封面211的锥顶角的角度α可以是35°、37°、39°、41°、43°或者45°。当然，在其他实施例中，锥形密封面211的锥顶角的角度α也可以是其他度数，在此就不再一一举例说明；在此范围内，阀芯20的密封受力点上移，可以降低关闭该截止阀100时的关紧力矩，使得阀芯20滑入阀座30的程度加深，阀芯20的密封载荷会变大，锥形密封面211发生的弹塑性变形也会增大，从而提升产品的密封性能，降低泄漏率；除此之外，由于锥形密封面211变长，也可以使得截止阀100的节流特性得到改善。
可以理解的是，当锥形密封面211的锥顶角的角度过大时，阀芯20的密封载荷则会过小，降低产品的密封性能，使得密封达不到要求；当锥形密封面211的锥顶角的角度过小时，则会趋近于与阀座30内侧面平行，形成面面密封，降低密封性能。
阀体10是阀门中的一个主要零部件，不同的压力等级有不同的机械制造方法，在本实施方式中，阀体10采用铸造的工艺生产，当然，在其他实施方式中，阀体10还可以采用锻造或者其他方式的工艺生产。
具体地，阀体10材料为金属，适用于水处理、轻工、石油、化工等行业等中低压常温工况，其密封性能较好。
在一实施方式中，阀腔11位于阀体10内部，用于介质间的互相流通；阀体10内还具有与阀腔11连通的第一安装孔111和第二安装孔112，其中，第一安装孔111位于阀体10远离流通口一12的一端并与阀腔11连通，第二安装孔112为内螺纹孔，第一安装孔111和第二安装孔112垂直设置，用于与截止阀100中的部件配合连接。
进一步地，阀体10开设有分别与阀腔11连通的流通口一12和流通口二13，流通口一12与流通口二13垂直设置，用于内部介质的流入/流出，其中，第一安装孔111在阀体10上的位置与流通口一12在阀体10上的位置相对设置，第二安装孔112在阀体10上的位置与流通口二13在阀体10上的位置相对设置。
如图1及图2所示，截止阀100还包括流通口一12接管与流通口二13接管，流通口一12接管安装于流通口一12处，流通口二13接管安装于流通口二13处，截止阀100主要是通过流通口一12接管/流通口二13接管与空调系统中的对应部件连接，使得介质通过流通口一12接管/流通口二13接管流入/流出截止阀100内。
在一实施方式中，截止阀100包括阀芯20与阀座30，阀芯20靠近阀座30的一端设有锥形段21，锥形段21具有相对设置的大径端212和小径端213，大径端212靠近阀芯20设置，且大径端212的外径小于或等于阀芯20的外径，以使阀芯20与锥形段21之间形成第一台阶24，锥形段21的外表面形成锥形密封面211，锥形密封面211的设置可以使阀芯20和阀座30之间的密封性能得到增强，降低泄漏率；锥形密封面211能够随阀芯20运动与阀座30相接触，锥形密封面211与阀座30靠近阀芯20一端的内壁互相抵靠，形成密封副。
如图3所示，小径端213的端面具有沉槽22，沉槽22使得阀芯20的质量得到减轻，从而减少阀芯20与阀座30之间的摩擦力，进而降低阀芯20的磨损；沉槽22的深度从小径端213至大径端212方向延伸至阀芯20；沉槽22在大径端212处的槽壁厚度为B1，沉槽22在阀芯20处的槽壁厚度为B2，B1＝(0.5～1)B2。
作为可选地，沉槽22在大径端212处的槽壁厚度与沉槽22在阀芯20处的槽壁厚度的比例关系为：B1＝(0.7～1)B2；也就是说，沉槽22在大径端212处的槽壁厚度B1可以是沉槽22在阀芯20处的槽壁厚度B2的0.7倍、0.75倍、0.8倍、0.85倍、0.9倍、0.95倍或者1.0倍；当然，在其他实施例中，沉槽22在大径端212处的槽壁厚度B1可以是沉槽22在阀芯20处的槽壁厚度B2的其他倍数，在此就不再一一举例说明；在该范围内，阀芯20的弹性性能得以增加，锥形密封面211能与阀座30更加紧密契合，从而提升产品的密封性 能，降低泄漏率；而且因为去除了部分材料，降低了重量，从而降低了材料成本。
可以理解的是，当沉槽22在大径端212处的槽壁厚度B1与沉槽22在阀芯20处的槽壁厚度B2的比值过小时，则会导致阀芯20强度不够，并且容易发生弯曲变形；当沉槽22在大径端212处的槽壁厚度B1与沉槽22在阀芯20处的槽壁厚度B2的比值过大时，则会使得材料利用率不高，浪费材料。
具体地，阀芯20从密封面形式来分可分为平面型、锥面型、球面型、刀型等。在本实施方式中，密封面可选为锥面型结构，相比于其它类型，锥面型结构的密封面夹角更小，密封面面积更大，当密封负荷增大时，阀芯20滑入阀体10的程度加深，不容易受冲蚀损坏，而且由于锥形面较长，也可以使得截止阀100的节流特性得到改善。
进一步地，阀芯20远离锥形密封面211的一端伸入第一安装孔111内并与阀体10滑动连接，可以理解的是，第一安装孔111的设置，能够实现阀芯20在阀腔11内运动的导向，使得阀芯20的运动更加精确。
阀芯20远离所述沉槽22的一端开设有连接孔23，所述连接孔23用于配合外部工具，以控制所述阀芯20运动，从而开启或者关闭所述截止阀100。
作为可选地，配合于连接孔23的外部工具可选用阀杆(图未示)，当然，在其他实施例中，外部工具可以为任意可供配合连接孔23以及操控阀芯20的工具。
具体地，连接孔23的内壁具有内螺纹(图未示)，阀杆的外壁具有外螺纹，外螺纹与内螺纹之间螺纹连接，以实现阀杆与阀芯20之间的连接。
当截止阀100工作时，将阀杆旋入连接孔23中，顺时针转动阀杆，阀杆带动阀芯20与阀座30紧密贴合，阀体10关闭，切断内部介质的流通；逆时针转动阀杆，阀杆带动阀芯20与阀座30分离开来，阀体10打开，开启内部介质的流通，从而实现对于内部介质的操控。
在一实施方式中，流通口一12的内壁设有第二台阶31，阀座30的一端伸入流通口一12，并与第二台阶31抵靠，从而对阀座30相对于流通口一12的位置进行限位作用。
同时，阀座30的内壁上还设有第三台阶32，流通口一12接管的一端伸入阀座30内，并与第三台阶32抵靠，以阻止流通口一12接管过度伸入阀座30内；当然，也可以起到对流通口一12接管进行安装定位的作用。
具体地，阀座30通过焊接的方式与流通口一12固定，采用焊接的方式可以增强阀座30与流通口一12之间的牢固程度，简化了工艺进程，焊接方式可选激光焊接。当然，在其他实施方式中，阀座30与流通口一12之间也可以采用过盈配合的方式固定在一起。
在一实施方式中，阀芯20和阀座30的材料均为金属，即阀芯20和阀座30之间采用 的是硬密封，而硬密封多用于供热、供气、煤气、油品、酸碱等环境，其能够使得阀座30和阀芯20之间的密封性能更加稳定。
可选地，阀座30和阀芯20的材料均为铜、钢或者铜合金材料。
在一实施方式中，第一安装孔111内部还设有限位环40，限位环40搭设于阀体10内部远离阀芯20一端，当阀杆旋入连接孔23操控阀芯20结束后，旋出阀芯20时可能会将阀芯20一并旋出，为避免这种情况，设置限位环40可以防止在这种情况下阀芯20在阀杆的带动下一并被旋出，起到限位作用。
如图1及图2所示，截止阀100还包括第一阀帽50，第一阀帽50位于阀体10远离流通口一12的一端，并将第一安装孔111覆盖，以避免灰尘、雨水从第一安装孔111进入阀腔11内，即通过设置第一阀帽50，实现对截止阀100防尘和防水的作用。
作为可选地，第一阀帽50与阀体10之间通过螺纹连接，以实现第一阀帽50的快速拆/装，从而便于阀杆对阀芯20的快速操作。当然，在其他实施例中，第一阀帽50与阀体10之间还可以通过除螺纹连接的其他方式连接，例如卡接等。
如图1及图2所示，截止阀100还包括气门芯60，气门芯60安装于第二安装孔112内，用于对阀腔11内充注制冷剂，使得当需要充注制冷剂时，制冷剂可以通过气门芯60以及气门嘴充入到空调系统的制冷系统内部。可以理解的是，在其他实施例中，第二安装孔112的位置还可以设置在阀体10上的其他位置，只要能够安装气门芯60，并通过气门芯60对阀腔11内充注制冷剂即可。
进一步地，气门芯60的外侧壁与第二安装孔112的内壁之间密封连接，以避免阀腔11内的制冷剂从第二安装孔112泄出。
可选地，截止阀100还包括第二阀帽70，第二阀帽70盖设于第二安装孔112处，并与阀体10连接，以防止灰尘、雨水进入第二安装孔112内。
可选地，第二阀帽70与阀体10之间通过密封连接，以进一步地防止灰尘、雨水进入第一安装孔111内。
本申请提供的截止阀100主要是通过将第一阀帽50旋出，旋入阀杆与连接孔23相配合，通过阀杆带动阀芯20向下垂直运动，由于阀芯20锥形密封面211的锥顶角的角度α的范围为35°～45°，因此当拧紧阀芯20，密封负荷增大时，阀芯20滑入阀座30的程度加深，锥形密封面211能与阀座30更加紧密契合，而且锥形密封面211的锥顶角在该范围内，阀芯20的密封载荷会变大，锥形密封面发生的弹塑性变形也会增大，从而提升产品的密封性能，降低泄漏率，解决了由于阀体10、阀芯20和阀座30的同心度不好从而导致高泄漏率的问题，提高了截止阀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 (10)

  1. 一种截止阀，包括阀体、阀芯以及阀座，所述阀体内具有阀腔，所述阀体开设有分别与所述阀腔连通的流通口一和流通口二，所述阀芯设于所述阀腔内部，并能够在所述阀腔内运动，以控制所述流通口一和所述流通口二之间的通/断；
    其特征在于，所述阀芯的一端具有锥形密封面，所述锥形密封面能够随所述阀芯运动，以与所述阀座接触或远离，所述锥形密封面的锥顶角的角度α的范围为30°～60°。
  2. 根据权利要求1所述的截止阀，其中，所述阀芯靠近所述流通口一的一端设有锥形段，所述锥形段具有相对设置的大径端和小径端，所述大径端靠近所述阀芯设置，且所述大径端的外径小于或等于所述阀芯的外径，所述锥形段的外表面形成所述锥形密封面。
  3. 根据权利要求2所述的截止阀，其中，所述小径端的端面具有沉槽，所述沉槽的深度从所述小径端至所述大径端方向延伸至所述阀芯；
    所述沉槽在所述大径端处的槽壁厚度为B1，所述沉槽在所述阀芯处的槽壁厚度为B2，且B1＝(0.5～1)B2。
  4. 根据权利要求2所述的截止阀，其中，所述小径端的端面具有沉槽，所述沉槽的深度从所述小径端至所述大径端方向延伸至所述阀芯；
    所述沉槽在所述大径端处的槽壁厚度为B1，所述沉槽在所述阀芯处的槽壁厚度为B2，且B1＝(0.7～1)B2。
  5. 根据权利要求1所述的截止阀，其中，所述锥形密封面的锥顶角的角度α的范围为35°～45°。
  6. 根据权利要求3所述的截止阀，其中，所述阀芯远离所述沉槽的一端开设有连接孔，所述连接孔用于配合外部工具，以控制所述阀芯运动。
  7. 根据权利要求2所述的截止阀，其中，所述大径端的外径小于所述阀芯的外径，以使所述阀芯与所述锥形段之间形成第一台阶。
  8. 根据权利要求1所述的截止阀，其中，所述阀体与所述阀座一体或分体设置。
  9. 根据权利要求8所述的截止阀，其中，所述流通口一内壁设有第二台阶，所述阀座的一端伸入所述流通口一，并与所述第二台阶抵靠。
  10. 根据权利要求9所述的截止阀，其中，所述截止阀还包括流通口一接管，所述阀座的内壁上还设有第三台阶，所述流通口一接管的一端伸入所述阀座内，并与所述第三台阶抵靠。
PCT/CN2021/102387 2020-07-15 2021-06-25 截止阀 WO2022012303A1 (zh)

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