WO2023088460A1 - 一种截止阀 - Google Patents

一种截止阀 Download PDF

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Publication number
WO2023088460A1
WO2023088460A1 PCT/CN2022/133175 CN2022133175W WO2023088460A1 WO 2023088460 A1 WO2023088460 A1 WO 2023088460A1 CN 2022133175 W CN2022133175 W CN 2022133175W WO 2023088460 A1 WO2023088460 A1 WO 2023088460A1
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WO
WIPO (PCT)
Prior art keywords
valve
valve body
cavity
internal thread
head
Prior art date
Application number
PCT/CN2022/133175
Other languages
English (en)
French (fr)
Inventor
楼峰
寿杰
王彬
Original Assignee
浙江盾安人工环境股份有限公司
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
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 EP22894989.7A priority Critical patent/EP4431768A1/en
Priority to KR1020247018616A priority patent/KR20240091348A/ko
Publication of WO2023088460A1 publication Critical patent/WO2023088460A1/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
    • 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
    • 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
    • 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
    • F16K1/46—Attachment of sealing rings

Definitions

  • the present application relates to the technical field of refrigeration, in particular to a shut-off valve.
  • the globe valve also known as the gate valve, belongs to the forced sealing valve, which plays an important role in cutting off and throttling the medium in the pipeline where it is located.
  • the existing globe valve generally includes a valve body and a valve core, and the valve core is installed on the valve body.
  • the valve core is provided with an external thread
  • the valve body is provided with an internal thread that cooperates with the external thread.
  • the movement of the valve core in the valve body is realized by the screwing of the external thread and the internal thread to open/close the stop valve.
  • the internal thread is generally arranged in the valve cavity of the valve body, and the circulation of the medium causes the internal thread valve body to be damaged by the impact and corrosion of the medium for a long time, which in turn causes the valve core to be stuck in rotation.
  • the internal thread section is also arranged at the port of the valve body or partially above the valve body port, so that the internal thread section can be protected from the impact of the medium and prolong its service life.
  • the external thread section matched with the internal thread section on the spool also needs to at least partially protrude from the valve body, resulting in a longer length of the spool and larger materials required for processing.
  • a stop valve is provided.
  • the shut-off valve of the present application includes a valve body and a valve core.
  • the valve body is provided with a valve cavity and an installation cavity.
  • the installation cavity communicates with the valve cavity.
  • the valve core is installed in the installation cavity and can Move in the installation cavity to extend into the valve cavity and open/close the stop valve, the stop valve also includes an internal thread sleeve, the internal thread sleeve is located in the installation cavity and close to the The valve cavity is provided, and the valve core is threadedly connected with the internal thread sleeve.
  • a port is provided on a side of the installation cavity far away from the valve cavity, a limiter is provided at the port, an upper limit portion is provided on the valve core, and the limiter stops the The upper limit part is used to limit the movement stroke of the valve core toward the port, and prevent the valve core from falling out of the valve body and affect the normal use of the shut-off valve.
  • the end surface of the valve core away from the valve chamber forms the upper limit portion
  • the end surface of the valve core itself is used to form the upper limit portion, and there is no need to set another upper limit portion on the valve core, which simplifies the structure , saving processing costs.
  • the end face of the spool is stopped, and the spool moves outward in the valve body to the maximum stroke, and it will not protrude out of the port, thereby limiting the movement range of the spool in the valve body and protecting the spool from being outside.
  • the material is damaged, and the length of the spool and the overall size of the globe valve are further reduced.
  • the limiting member includes a limiting ring extending circumferentially along the inner wall of the valve body, the end of the valve core away from the valve cavity is a conical structure and made of soft metal, the The side of the circular truncated structure abuts against the inner ring line of the limit ring to form a line-surface sealing structure.
  • the soft metal material has a small hardness and is soft, and is relatively easy to deform when squeezed, thereby producing a better sealing effect , in this scheme, the valve core and the limit ring are used to seal together, without additional seals, saving material costs, and there is no need to set grooves for the seals on the valve core or valve body, which simplifies the structure and reduces processing costs.
  • the valve core includes a valve stem and a sealing portion
  • the valve stem is provided with an external thread and passed through the internal thread sleeve
  • the valve stem is provided on a side close to the valve cavity.
  • the sealing part is made of soft metal material
  • the sealing part extends into the valve cavity and opens/closes the stop valve
  • the soft metal material has low hardness and soft quality, and is relatively easy to break out when squeezed. deformation, so that a better sealing effect can be produced at the valve port.
  • the sealing part and the valve port are directly matched and sealed without additional seals, saving material costs, and there is no need to set up a containment seal on the valve core or valve body.
  • the groove of parts, etc. simplifies the structure, reduces the difficulty of processing and assembly, ensures the strength of parts, and at the same time, there is no need to worry about the problem of sealing parts falling off or aging, which reduces the frequency of maintenance, improves the use experience and prolongs the service life.
  • the valve core further includes a head, the head is arranged at the end of the valve stem away from the valve cavity, the valve body limits the head in the circumferential direction, and the internal thread sleeve While screwing with the screw, it also acts as a circumferential limit on the screw, so that two spaced circumferential limit parts are formed in the axial direction of the valve core to ensure that the valve core moves along a limited path in the valve body. Stability while moving and moving.
  • the outer diameter of the head is larger than the outer diameter of the valve stem, so as to form a convex ring between the head and the valve stem, and the upper end surface of the inner threaded sleeve stops the
  • the protruding ring is used to limit the moving stroke of the valve core to the direction of the valve seat.
  • the protruding ring abuts against the upper end surface of the internal thread sleeve, and uses the structure of the head itself to form a limit with the upper end surface of the internal thread sleeve. , Simplify the structure of the spool, save material and processing costs.
  • a sealing ring is provided between the head and the valve body to form a circumferential seal between the head and the valve body, thereby sealing the valve body and allowing the medium to Will not leak.
  • the internal thread sleeve is separately arranged and fixedly connected with the shut-off valve, so as to reduce the processing technology of the valve body and reduce the processing difficulty of the valve body.
  • the side of the valve body is provided with a second opening, and the projection of the internal thread sleeve on the valve body along the radial direction of the valve body is the same as that of the second opening along the valve body.
  • the projections of the radial direction on the valve body do not overlap, so as to prevent the inner threaded sleeve from hindering the flow of the medium or generating flow noise.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of a shut-off valve in an embodiment of the present application.
  • Fig. 2 is a cross-sectional view of a shut-off valve in an embodiment of the present application.
  • Fig. 3 is a partial enlarged view of A in Fig. 2 .
  • Fig. 4 is a partially enlarged view of B in Fig. 2 .
  • Fig. 5 is a cross-sectional view of a valve body according to an embodiment of the present application.
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as “first” and “second” may explicitly or implicitly include one or more of these features.
  • plural means two or more, unless otherwise clearly defined.
  • a first feature being "on” or “under” a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them.
  • “above”, “above” and “above” the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.
  • “Below”, “beneath” and “under” the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the level of the first feature is smaller than that of the second feature.
  • the globe valve when it comes to orientation words such as up, down, left and right, the globe valve is installed vertically as shown in the drawings by default, and when it comes to the axial direction, it is defaulted along the central axis of the valve core. I won't go into details below.
  • This application provides a cut-off valve 100, which can be applied in the refrigeration system of the air conditioner.
  • the refrigeration system transfers heat through the refrigerant in the circulation system to achieve cooling.
  • the cut-off valve 100 is installed in the medium passage. To control the cut-off and circulation of the passage, and to supplement the medium to the refrigeration system.
  • the stop valve 100 includes a hollow valve body 110 , a valve seat 120 and a valve core 130 .
  • the valve body 110 is provided with a valve chamber 110a and an installation chamber 110b, and the installation chamber 110b communicates with the valve chamber 110a;
  • the valve seat 120 is located in the valve body 110 and is located on the side of the valve cavity 110a away from the installation cavity 110b.
  • the valve seat 120 is provided with a valve port 121; the valve core 130 is installed in the valve body 110 in the installation cavity 110b, and can The valve body 110 moves in order to extend into the valve cavity 110a and open/close the shut-off valve.
  • valve body 110 in this application uses a stainless steel valve body 110 .
  • the valve body 110 includes a port 111, a first opening 112 and a second opening 113. Referring to FIGS. On one side of the cavity 110a, the first opening 112 and the second opening 113 are respectively opened on the lower side and the right side of the valve body 110, the valve cavity 110a is formed between the first opening 112 and the second opening 113, and the valve seat 120 is placed on the second At one opening 112, the side of the first opening 112 away from the valve body 110 is connected to a first communication pipe 180, and the first opening 112 communicates with the outside world through the first communication pipe 180; the second opening 113 is connected to a side far away from the valve body 110. There is a second communication pipe 190 through which the second opening 113 communicates with the outside world.
  • the first communication pipe 180 and the second communication pipe 190 serve as the inlet or outlet of the medium respectively.
  • the medium enters the shut-off valve 100 from the first communication pipe 180 and enters the interior of the valve body 110 through the first opening 112. If the shut-off valve 100 is in an open state, the medium passes through the second opening 113 , flow out of the shut-off valve 100 through the second communication pipe 190; vice versa, the medium can also enter the valve body 110 from the second communication pipe 190 through the second opening 113, and then flow out of the shut-off valve through the first opening 112 and the first communication pipe 180 100.
  • the positions of the first opening 112 and the second opening 113 are not limited to being opened on the lower side and the right side of the valve body 110 in this embodiment.
  • the first opening 112 and the second opening 113 can also be arranged on the left and right sides, the upper and lower sides, etc. of the valve body 110, as long as the axial movement of the valve core can realize the gap between the two valve ports. Connect or truncate.
  • the spool 130 In order to drive the spool 130 to move smoothly in the valve body 110, the spool 130 is provided with an operating part 132 near the port 111 to facilitate the operation of the spool 130.
  • the spool 130 includes a valve stem 131 with an external thread 1311
  • the valve body 110 is provided with an internal thread that cooperates with the external thread 1311 .
  • the internal thread valve body 110 of the traditional brass globe valve is directly installed at the valve cavity 110a of the valve body 110, but the valve cavity 110a has been impacted and corroded by the medium for a long time, causing the internal thread to be damaged.
  • the valve body 110 is made of stainless steel. It is difficult to directly process threads on the stainless steel valve body 110, and the requirements for the valve body 110 are relatively high. 130 passes through the internal thread sleeve 140 and is screwed with the internal thread sleeve 140 to drive the valve core 130 to move in the valve body 110 . While the internal thread sleeve 140 is screwed with the valve stem 131 , it also plays the role of axial guidance and circumferential limit for the valve stem 131 .
  • the internally threaded sleeve 140 in the related art is generally located at the port 111 of the valve body 110 or partially protrudes outside the port 111 of the valve body 110, so the external thread 1311 that cooperates with the internally threaded sleeve 140 generally also needs to be partially protruded from the outer end of the port 111, And part of it protrudes out of the port 111, so that the length of the valve core 130 is longer and the material required for processing is larger.
  • the internal thread sleeve 140 is located in the installation cavity 110b and is disposed close to the valve cavity 110a, and the spool 130 is threadedly connected with the internal thread sleeve 140.
  • the above installation position of the internal thread sleeve 140 prevents the internal thread of the internal thread sleeve 140 from being impacted and corroded by the medium.
  • the mating section between the valve body 110 and the internal thread sleeve 140 is also located in the valve body 110 , which can improve the stability of the valve core 130 when it moves.
  • valve core 130 can be designed to be shorter, reducing the overall size of the shut-off valve, thereby saving processing materials.
  • the projection of the control internal thread sleeve 140 on the valve body 110 along the radial direction of the valve body 110 does not overlap with the projection of the second opening 113 on the valve body 110 along the radial direction of the valve body 110 . This can prevent the inner threaded sleeve 140 from hindering the flow of the medium or generating flow noise.
  • the internal thread sleeve 140 and the valve body 110 in this embodiment can be arranged separately, and welded or otherwise It is fixed on the inner wall of the valve body 110 to reduce the processing technology of the valve body 110 and reduce the processing difficulty of the valve body 110 .
  • the internal thread sleeve 140 and the valve body 110 can also be integrally formed to facilitate production and processing and simplify installation.
  • the internal thread sleeve 140 is disposed close to the valve chamber 110a to shorten the length of the valve core 130 as much as possible.
  • the internal thread sleeve 140 can also be arranged at other positions in the valve body 110 as required, such as the middle position between the valve chamber 110 a and the port 111 .
  • the valve core 130 in this embodiment includes a head 133, a valve stem 131 and a sealing portion 134, the valve stem 131 is provided with an external thread 1311, and the head 133 and the sealing portion 134 are respectively arranged on two sides of the valve stem 131.
  • the sealing part 134 is arranged at one end close to the valve cavity 110a, and can be inserted into the valve port 121 through the axial movement of the valve core 130 to realize the closing of the valve port 121.
  • the sealing The portion 134 adopts a rounded platform structure or a necking structure with a reduced lower end.
  • the valve body 110 is provided with a lower limit portion.
  • the valve port 121 When closed, the upper end surface of the internal thread sleeve 140 stops the lower limit portion to limit the movement of the valve core 130 to the valve seat 120.
  • the internal thread sleeve 140 is integrated and multi-purpose, and there is no need to set up a lower stop portion, which simplifies the internal structure of the valve body 110 , saving material and processing costs.
  • the head 133 is arranged at one end close to the port 111 , that is, the head 133 is connected to the end of the valve stem 131 away from the valve chamber 110 a.
  • the head 133 and the valve body 110 are limited in the circumferential direction, combined with the circumferential limit of the spool 130 by the internal thread sleeve 140, the spool 130 Two spaced circumferential limiting parts are formed in the axial direction to ensure the stability of the valve core 130 when moving along the limited path in the valve body 110 and moving.
  • the outer wall of the head 133 is directly limited by the inner wall of the valve body 110, and an internal thread sleeve 140 is provided between the valve stem 131 and the inner wall of the valve body 110, so the radial length of the head 133 is greater than that of the valve stem 131.
  • Radial length, a protruding ring 135 is formed between the head 133 and the valve stem 131, and the protruding ring 135 forms a lower limit portion, which is limited by the structure of the head 133 itself and the upper end surface of the internal thread sleeve 140, without additionally installing on the valve core 130
  • the limit part is set to simplify the valve core structure and save material and processing costs.
  • an auxiliary limiting member may also be sleeved outside the head, so that the head and the valve body 110 are indirectly limited.
  • the operating part 132 of the spool 130 in this embodiment is a hollow structure extending inwardly from the upper end of the head 133, and a plurality of planes are evenly distributed on the inner surface of the operating part 132 at intervals, so that it can be adapted to the internal hexagonal wrench, etc. tool.
  • the planes of the inner surface of the operating part may also be set to be uniformly distributed without intervals, so as to be suitable for wrenches with irregular shapes.
  • valve stem 131 When the valve port 121 needs to be closed, the valve stem 131 is forwardly screwed relative to the internal thread sleeve 140, and the valve stem 131 moves axially downward relative to the internal thread, driving the sealing part 134 and the head 133 to move downward until the sealing part 134 penetrates into the valve.
  • the protruding ring 135 In order to realize the closure of the valve port 121 , until the protruding ring 135 abuts against the upper end of the internal thread sleeve 140 to limit the axial downward movement of the valve core 130 .
  • valve stem 131 When the valve port 121 needs to be opened, the valve stem 131 is reversely screwed relative to the internal thread sleeve 140, and the valve stem 131 moves upward relative to the internal thread sleeve 140, driving the sealing part 134 and the head 133 to move upward, and the sealing part 134 is released from the valve port 121. out, and continue to move axially upwards to open a channel of a certain width, but the spool 130 cannot move unrestrainedly to the valve port 121, so as not to come out from the valve body 110 and affect the normal use of the stop valve 100, so it is necessary to check the spool 130 axially move the stroke upwards to limit.
  • the valve body 110 is provided with a limiter 150
  • the valve core 130 is provided with an upper limit portion
  • the valve port 121 When opening, the limiter 150 stops the upper limit portion.
  • the limiter 150 is located inside the port 111 and abuts against the upper end surface of the valve core 130 when the valve core 130 moves axially upward to the maximum stroke.
  • the valve core 130 The end surface of the end far away from the valve cavity 110a forms an upper limit portion. More specifically, the limit member 150 abuts against the head 133, and the upper end surface of the head 133 is integrated for multiple purposes.
  • the spool 130 moves outward in the valve body 110 to the maximum stroke, and will not protrude out of the port 111, thereby limiting the movement range of the spool 130 to the valve body 110 and protecting the spool 130 not be damaged by foreign objects, and further reduce the length of the valve core 130 and the overall size of the shut-off valve.
  • the limiter 150 can be provided separately from the inner wall of the valve body 110 , fixed on the inner wall of the valve body 110 by means of welding or the like, or integrally formed with the inner wall of the valve body 110 .
  • the sealing portion 134 and the head portion 133 can be integrated with the valve stem 131 to save installation steps and omit matching structures.
  • sealing part and the head part can also be provided separately from the valve stem, so that each valve core and each part can be cut separately to reduce cutting amount and improve processing efficiency.
  • the stop valve 100 has high requirements on sealing performance.
  • the sealing part 134 and the valve port 121 need to be sealed.
  • Sealing structures such as red copper sealing rings are additionally set up between the ports 121, the sealing structure is complex, and the sealing effect is relatively poor.
  • the material of the sealing portion 134 is made of soft metal, such as metal aluminum, zinc, lead, silver, etc.
  • the soft metal material has low hardness and soft quality, and is relatively easy to deform when squeezed, so that A better sealing effect is produced at the valve port 121, the sealing part 134 and the valve port 121 are directly matched and sealed, and no additional seal 174 is required, which saves material costs, and there is no need to provide accommodating seals on the valve core 130 or valve body 110
  • the groove of 174 simplifies the structure, reduces the difficulty of processing and assembly, and ensures the strength of the components. At the same time, there is no need to worry about the problem that the seal 174 will fall off or age and affect the sealing performance. This reduces the frequency of maintenance, improves the user experience, and prolongs the service life.
  • an installation groove 1331 is provided along the outer wall of the head 133 in the circumferential direction, and the inner ring of the sealing ring 160 is placed in the installation groove 1331.
  • the outer ring of the sealing ring 160 and the inner wall of the valve body 110 interference fit and can move up and down relative to the inner wall of the valve body 110 .
  • the valve core 130 moves axially upward to the maximum stroke, and the contact between the stopper 150 and the head 133 needs to be sealed.
  • another sealing structure such as a red copper sealing ring needs to be set between the limiting member 150 and the head 133.
  • the sealing structure is complicated and the sealing effect is poor.
  • the end of the spool 130 away from the spool 130 is a circular platform structure and made of soft metal material, that is, the end of the head 133 away from the valve core 130 is a circular platform structure and made of soft metal material, the side of the circular platform structure 133a It abuts against the inner ring line 150a of the limit ring to form a line-surface sealing structure.
  • the soft metal material has low hardness and soft quality, and is relatively easy to deform when squeezed, so that a better sealing effect can be produced.
  • the valve is used
  • the core 130 is sealed with the limit ring itself, and there is no need for an additional seal 174, which saves material costs, and there is no need to set a groove for the seal 174 on the valve core 130 or the valve body 110, which simplifies the structure and reduces processing and assembly. Difficulty, to ensure the strength of the components, and at the same time, there is no need to worry about the problem that the seal 174 will fall off or age and affect the sealing performance, reduce the frequency of maintenance, improve the use experience, and prolong the service life.
  • the soft metal material of the head 133 can also act as a buffer function, to prevent the head 133 from rigidly colliding with the limit ring.
  • the spool 130 can only have the head 133 and the sealing portion 134 made of soft metal, and the valve stem 131 is made of stainless steel to ensure the rigidity and hardness of the valve stem 131, slow down the wear and tear during screwing, and prolong the service life of the spool 130.
  • valve core 130 is made of soft metal as a whole, so as to facilitate injection molding.
  • the stop valve 100 also includes a valve assembly 170, which is connected to the valve body 110.
  • the valve assembly 170 is arranged opposite to the second opening 113 as an air inlet or an air discharge outlet. , used to replenish or release medium to the entire refrigeration system.
  • the axis of the valve assembly 170 can also be arranged perpendicular to the axis of the second opening 113 , and the valve assembly 170 can also be arranged at other positions of the main body.
  • the valve assembly 170 includes a connecting body 171 connected to the valve body 110 , and the connecting body 171 serves as a passage for the medium to enter the valve body 110 .
  • the valve assembly 170 also includes a valve core 172 , a housing 173 and a seal 174 .
  • the valve core 172 is arranged in the connecting body 171, which can make the inside of the main body communicate with or isolate the inside of the connecting body 171, and the casing 173 is sleeved on the outer peripheral side of the connecting body 171 to protect the valve core 172 and prevent external impurities from entering;
  • the seal 174 is located between the casing 173 and the connection body 171 , and cooperates with the casing 173 to seal the connection body 171 .
  • one end of the valve core 172 is provided with an elastic member 175 for resetting the valve core 172 .
  • the connecting body 171 remains sealed to isolate the inside of the valve body 110 from the outside; when the valve core 172 is under pressure, the valve core 172 squeezes the elastic member 175, and Move towards the direction close to the main body, thereby releasing the blockage, so that the interior of the main body communicates with the interior of the connecting body 171 , so that the medium can pass into the interior of the valve body 110 or flow out of the interior of the valve body 110 .
  • the internal thread sleeve is arranged in the installation cavity and close to the valve cavity, which not only avoids the internal thread of the internal thread sleeve from being impacted and corroded by the medium, but at the same time, the matching section between the valve body and the internal thread sleeve is also located in the valve body, so it can be
  • the spool is designed to be shorter, which saves processing materials, improves its stability during movement, and reduces the overall size of the globe valve.

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

Abstract

一种截止阀(100)，包括阀体(110)和阀芯(130)，阀体内设有阀腔(110a)以及安装腔(110b)，安装腔(110b)与阀腔(110a)连通，阀芯(130)安装于安装腔(110b)内，并能够在安装腔(110b)内运动，以伸入阀腔(110a)并启/闭截止阀(100)，截止阀(100)还包括内螺纹套(140)，内螺纹套(140)位于安装腔(110b)内，并靠近阀腔(110a)设置，阀芯(130)与内螺纹套(140)螺纹连接。

Description

一种截止阀
相关申请
本申请要求2021年11月22日申请的，申请号为202122876117.4，发明名称为“一种截止阀”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
本申请涉及制冷技术领域，具体涉及一种截止阀。
背景技术
截止阀又名截门阀，属于强制密封式阀门，对其所在的管路中的介质起着切断和节流的重要作用，现有的截止阀一般包括阀体和阀芯，阀芯安装于阀体中，阀芯上设有外螺纹，阀体中设有与外螺纹配合的内螺纹，通过外螺纹和内螺纹螺合实现阀芯在阀体中的运动以启/闭截止阀。现有黄铜截止阀中，内螺纹一般设置在阀体的阀腔中，介质流通使内螺纹阀体长期受到介质的冲击和腐蚀而损坏，进而导致阀芯转动卡顿。为了解决上述技术问题，一些现有技术中，也将内螺纹段设置在阀体端口或部分高出阀体端口外，由此，内螺纹段可以免受介质冲击，延长其使用寿命。但阀芯上与内螺纹段配合的外螺纹段也需要至少部分伸出阀体外，导致阀芯长度较长，加工所需物料较大。同时为了实现阀芯与阀体或阀座的密封，并保证阀芯移动时的稳定性等，阀芯上需要设计较多复杂结构，以及较多与之配合的部件，增加截止阀的加工和装配难度，降低生产效率。
发明内容
根据本申请的各种实施例，提供一种截止阀。
本申请的截止阀，包括阀体和阀芯，所述阀体内设有阀腔以及安装腔，所述安装腔与所述阀腔连通，所述阀芯安装于所述安装腔内，并能够在所述安装腔内运动，以伸入所述阀腔并启/闭所述截止阀，所述截止阀还包括内螺纹套，所述内螺纹套位于所述安装腔内，并靠近所述阀腔设置，所述阀芯与所述内螺纹套螺纹连接。
在一些实施例中，所述安装腔远离所述阀腔的一侧开设端口，所述端口处设有限位件，所述阀芯上设有上限位部，所述限位件止挡所述上限位部，以限制所述阀芯向端口方向的移动行程，防止阀芯从阀体中脱出而影响截止阀的正常使用。
在一些实施例中，所述阀芯远离所述阀腔的一端的端面形成所述上限位部，利用阀芯自身的端面形成上限位部，无需在阀芯上另设上限位部，简化结构，节省加工成本。同时，将阀芯的端面止挡，阀芯在阀体中向外移动至最大行程处，也不会伸出端口外，从而将阀芯的移动范围限制在阀体内，保护阀芯不被外物损坏，也进一步缩小阀芯长度和截止阀整体尺寸。
在一些实施例中，所述限位件包括沿所述阀体的内壁周向延伸的限位环，所述阀芯远离所述阀腔的一端为圆台结构并采用软质金属材质，所述圆台结构的侧面与所述限位环的内环线抵接，以形成线面密封结构，软质金属材质硬度较小，质软，挤压时相对容易发生形变，从而能够产生较好的密封效果，本方案中利用阀芯与限位环自身配合密封，不用额外设置密封件，节省物料成本，也无需在阀芯或阀体上开设容置密封件的凹槽等，简化结构，降低加工和装配难度，保证部件强度，同时还无需担心密封件脱落或老化而影响密 封性的问题，减少检修频率，提升使用体验，延长使用寿命。
在一些实施例中，所述阀芯包括阀杆和封口部，所述阀杆上设有外螺纹并穿设在所述内螺纹套上，所述阀杆靠近所述阀腔的一侧设有封口部，所述封口部采用软质金属材质，所述封口部伸入所述阀腔并启/闭所述截止阀，软质金属材质硬度较小、质软，挤压时相对容易发生形变，从而能够在阀口处产生较好的密封效果，本方案中封口部和阀口直接配合密封，不用额外设置密封件，节省物料成本，也无需在阀芯或阀体上开设容置密封件的凹槽等，简化结构，降低加工和装配难度，保证部件强度，同时还无需担心密封件脱落或老化而影响密封性的问题，减少检修频率，提升使用体验，延长使用寿命。
在一些实施例中，所述阀芯还包括头部，所述头部设在所述阀杆远离所述阀腔的一端，所述阀体对所述头部周向限位，内螺纹套与螺杆螺合的同时，也对螺杆起到周向限位的作用，从而在阀芯轴向方向上形成两处间隔的周向限位部，以保证阀芯在阀体中沿限制的路径移动和移动时的稳定性。
在一些实施例中，所述头部的外径大于所述阀杆的外径，以在所述头部与所述阀杆之间形成凸环，所述内螺纹套上端面止挡所述凸环以限制阀芯向阀座方向的移动行程，凸环与内螺纹套上端面抵接，利用头部自身结构与内螺纹套上端面形成限位，无需在阀芯上另设下限位部，简化阀芯结构，节省物料和加工成本。
在一些实施例中，所述头部与所述阀体之间设有密封环，以对所述头部与所述阀体形成周向密封，以此密封阀体，使介质在流通过程中不会泄漏。
在一些实施例中，所述内螺纹套与所述截止阀分体设置并固定连接，以减少对阀体的加工工艺，降低阀体的加工难度。
在一些实施例中，所述阀体的侧面开设第二开口，所述内螺纹套沿所述阀体的径向方向在所述阀体上的投影与所述第二开口沿所述阀体的径向方向在所述阀体上的投影不重叠，以防止内螺纹套给介质流动造成阻碍或产生流动噪音。
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为本申请一个实施例中的截止阀的立体结构示意图。
图2为本申请一个实施例中的截止阀的剖视图。
图3为图2中A处局部放大图。
图4为图2中B处局部放大图。
图5为本申请一个实施例的阀体的剖视图。
附图标记：100、截止阀；110、阀体；110a、阀腔；110b、安装腔；111、端口；112、第一开口；113、第二开口；120、阀座；121、阀口；130、阀芯；131、阀杆；1311、外螺纹；132、操作部；133、头部；133a、侧面；1331、安装槽；134、封口部；135、凸环；140、内螺纹套；150、限位件；150a、内环线；160、密封环；170、气门组件；171、连接体；172、气门芯；173、罩壳；174、密封件；175、弹性件；180、第一连通管；190、第二连通管。
具体实施方式
下面结合本申请实施例的附图对本申请实施例的技术方案进行解释和说明，但下述实施例仅为本申请的优选实施例，并非全部。基于实施方式中的实施例，本领域技术人员在没有做出创造性劳动的前提下所获得其他实施例，都属于本申请的保护范围。
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一个或者更多个该特征。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上，除非另有明确的限定。
在本申请中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
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之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅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”包括第一特征在第二特征正下方和斜下方，或仅 仅表示第一特征水平高度小于第二特征。
在本实施例中，当涉及到上、下、左和右等方位词，均默认截止阀为附图所示的竖直安装状态，当涉及轴向，均默认沿阀芯的中心轴方向，下文不再赘述。
下面结合附图与具体实施方式对本申请的截止阀作进一步详细描述。
本申请提供一种截止阀100，该截止阀100可以应用于空调的制冷系统中，制冷系统将热量通过制冷剂在循环系统中循环转移，以实现降温，其截止阀100安装在介质通路中，以控制通路的截断和流通，并且用于向制冷系统补充介质。
截止阀100包括中空的阀体110、阀座120、阀芯130。阀体110内设有阀腔110a以及安装腔110b，安装腔110b与阀腔110a连通；
阀座120，设在阀体110内，并位于阀腔110a背离安装腔110b的一侧，阀座120上开设有阀口121；阀芯130安装于安装腔110b内阀体110，并能够在阀体110中运动，以伸入阀腔110a并启/闭所述截止阀。
传统黄铜截止阀成本较高，因此本申请中阀体110采用不锈钢阀体110。
阀体110包括端口111、第一开口112和第二开口113，参照图2和图5，在本实施例中，端口111位于阀体110的上侧，即端口111安装腔110b远离所述阀腔110a的一侧，第一开口112和第二开口113分别开设于阀体110的下侧和右侧，第一开口112与第二开口113之间形成阀腔110a，阀座120置于第一开口112处，第一开口112远离阀体110的一侧连接有第一连通管180，第一开口112通过第一连通管180与外界连通；第二开口113远离阀体110的一侧连接有第二连通管190，第二开口113通过第二连通管190与外界连通。第一连通管180和第二连通管190分别作为介质的进口或出口。当第一连通 管180作为介质的进口时，介质从第一连通管180进入截止阀100，通过第一开口112进入阀体110内部，若截止阀100呈开启状态，则介质通过第二开口113，经由第二连通管190流出截止阀100；反之亦然，介质也可以从第二连通管190经由第二开口113进入阀体110，再通过第一开口112和第一连通管180流出截止阀100。
可选地，第一开口112和第二开口113的位置不限于本实施例中的开设于阀体110的下侧和右侧。在其它实施例中，第一开口112和第二开口113也可以设置在阀体110的左右两侧、上下两侧等，只要可以通过阀芯的轴向运动可以实现两个阀口之间的连通或截断即可。
为了驱动阀芯130在阀体110中的平稳运动，阀芯130上靠近端口111位置处设有便于操作阀芯130的操作部132，同时，阀芯130包括带有外螺纹1311的阀杆131，阀体110上设有与外螺纹1311配合的内螺纹。传统黄铜截止阀的内螺纹阀体110直接开设在阀体110的阀腔110a处，但阀腔110a处长期受到介质的冲击和腐蚀致使内螺纹损坏。
本申请中阀体110采用不锈钢材质，直接在不锈钢的阀体110上加工螺纹难度较大，对阀体110要求较高，因此需在不锈钢的阀体110内另外设置内螺纹套140，阀芯130穿设于内螺纹套140并与内螺纹套140螺合，以带动阀芯130在阀体110中阀体110运动。内螺纹套140与阀杆131螺合的同时，也对阀杆131起到轴向导向和周向限位的作用。相关技术中的内螺纹套140一般设在阀体110端口111或部分高出阀体110端口111外，因此与内螺纹套140配合的外螺纹1311一般也需要部分高出端口111的外端，并部分伸出端口111外，致使阀芯130长度较长，加工所需物料较大。
为了缩短阀芯130的长度，根据本申请的一个实施例，内螺纹套140位 于安装腔110b内，并靠近阀腔110a设置，阀芯130与内螺纹套140螺纹连接。内螺纹套140的上述安装位置，避免了内螺纹套140的内螺纹被介质冲击和腐蚀。同时，阀体110与内螺纹套140的配合段也位于阀体110内，可以提高阀芯130运动时的稳定性。此外，阀体110与内螺纹套140的配合段也位于阀体110内，因而可以将阀芯130设计得较短，缩小截止阀的整体尺寸，进而节省加工物料。
在一些实施例中，控制内螺纹套140沿阀体110的径向方向在阀体110上的投影与第二开口113沿阀体110的径向方向在阀体110上的投影不重叠。如此可以以防止内螺纹套140给介质流动造成阻碍或产生流动噪音。
为了根据需要调整内螺纹套140的位置，并便于装配和更换，如图2和图4所示，本实施例中的内螺纹套140与阀体110可以采用分体设置，并通过焊接等方式固定在阀体110内壁上，以减少对阀体110的加工工艺，降低阀体110的加工难度。当然，内螺纹套140与阀体110也可以采用一体成型，以便于生产加工、简化安装。
在不影响阀口121开合、介质正常流的情况下，内螺纹套140越接近阀口121，则阀芯130长度可以设计得越短。在本申请的一些实施例中，内螺纹套140设置在紧挨阀腔110a的位置以尽量缩短阀芯130长度。
当然，在其他实施例中，内螺纹套140也可以根据需要设置在阀体110中的其他位置，如阀腔110a与端口111的中间位置等。
参照图2，本实施例中的阀芯130包括头部133、阀杆131和封口部134，阀杆131上设有外螺纹1311，头部133和封口部134分别设在阀杆131的两端，具体的，封口部134设在靠近阀腔110a的一端，并能够通过阀芯130的轴向移动插入阀口121中，以实现阀口121的闭合，为了便于封口部134的 插入，封口部134采用下端缩小的倒圆台结构或缩颈结构，为了防止阀芯130无节制向阀口121内移动，损坏阀座120或阀芯130，阀体110上设有下限位部，阀口121闭合时，内螺纹套140上端面止挡下限位部，以限制阀芯130向阀座120方向的移动行程，内螺纹套140一体多用，不用另设下止挡部，简化阀体110内部结构，节省物料和加工成本。
头部133设在靠近端口111的一端，即头部133连接在阀杆131远离阀腔110a的一端。参照图2，为了提高阀芯130在阀体110内安装后的稳定性，头部133与阀体110周向限位，结合内螺纹套140对阀芯130的周向限位，阀芯130轴向方向上形成两处间隔的周向限位部，以保证阀芯130在阀体110中沿限制的路径移动和移动时的稳定性。
本实施例中，头部133的外壁与阀体110内壁直接限位，而阀杆131与阀体110内壁之间设有内螺纹套140，因此头部133的径向长度大于阀杆131的径向长度，头部133与阀杆131之间形成凸环135，凸环135形成下限位部，利用头部133自身结构与内螺纹套140上端面形成限位，无需在阀芯130上另设下限位部，简化阀芯结构，节省物料和加工成本。
当然，在其他实施例中，也可以在头部外再套设辅助限位件，以使头部与阀体110间接限位。
参照图2，本实施例中阀芯130的操作部132为由头部133上端面向内延伸的空心结构，多个平面间隔均匀分布在操作部132的内表面，以此可以适应内六角扳手等工具。
在其他实施方式中，操作部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。
阀口121需要闭合时，阀杆131相对内螺纹套140正向螺合，阀杆131 相对内螺纹轴向向下移动，带动封口部134和头部133向下移动，直至封口部134深入阀口121中以实现阀口121的闭合，直至凸环135与内螺纹套140上端抵接，以限制阀芯130轴向向下移动。
阀口121需要打开时，阀杆131相对内螺纹套140反向螺合，阀杆131相对内螺纹套140向上移动，带动封口部134和头部133向上移动，封口部134从阀口121中脱出，并继续轴向向上移动以打开一定宽度的通道，但阀芯130不能无节制向阀口121上移动，以免从阀体110中脱出而影响截止阀100的正常使用，因此需要对阀芯130轴向向上移动行程进行限位。
本实施例中，如图2和图3所示，为了限制阀芯130向端口111方向的移动行程，阀体110上设有限位件150，阀芯130上设有上限位部，阀口121打开时，限位件150止挡上限位部，具体的，限位件150位于端口111内侧，并在阀芯130轴向向上移动至最大行程时与阀芯130上端面抵接，阀芯130远离阀腔110a的一端的端面形成上限位部，更具体的，限位件150与头部133抵接，头部133上端面一体多用，无需在阀芯130上另设上限位部，简化结构，节省加工成本，且阀芯130在阀体110中向外移动至最大行程处，也不会伸出端口111外，从而将阀芯130的移动范围限制在阀体110内，保护阀芯130不被外物损坏，进一步缩小阀芯130长度和截止阀整体尺寸。
限位件150可以与阀体110内壁分体设置，通过焊接等方式固定在阀体110内壁上，也可以与阀体110内壁一体成型。
参照图2，在本实施例中，封口部134、头部133可以与阀杆131一体设置，以节省安装步骤，省略配合结构。
当然，在其他实施例中，封口部、头部也可以与阀杆分体设置，以便将各阀芯各部件分别切削加工，减少刀削量，提高加工效率。
截止阀100对密封性要求较高，为了防止阀口121闭合时，介质由阀口121处渗出，封口部134与阀口121需要密封处理，相关技术中，通常需要在封口部134与阀口121之间另设紫铜密封圈等密封结构，密封结构复杂，密封效果较差。而在本实施例中，封口部134的材质选用软质金属材质，如金属铝、锌、铅、银等，软质金属材质硬度较小，质软，挤压时相对容易发生形变，从而能够在阀口121处产生较好的密封效果，封口部134和阀口121直接配合密封，不用额外设置密封件174，节省物料成本，也无需在阀芯130或阀体110上开设容置密封件174的凹槽等，简化结构，降低加工和装配难度，保证部件强度，同时还无需担心密封件174脱落或老化而影响密封性的问题，减少检修频率，提升使用体验，延长使用寿命。
为了防止介质由阀芯130和阀体110之间的缝隙流出，如图2和图3所示，头部133与阀体110之间设有密封环160，以对头部133与阀体110周向密封，以此密封阀体110，具体的，沿头部133的外侧壁周向开设安装槽1331，密封环160内圈置于安装槽1331中，密封环160外圈与阀体110内壁过盈配合并能相对阀体110内壁上下移动。
为了防止阀口121打开、介质流通时从阀体110端口111处流出，阀芯130轴向向上移动至最大行程处，限位件150与头部133抵接处需要密封处理，相关技术中，通常需要在限位件150与头部133之间另设紫铜密封圈等密封结构，密封结构复杂，密封效果较差，而在本实施例中，限位件150为沿阀体110内壁周向延伸的限位环，阀芯130远离阀芯130的一端为圆台结构并采用软质金属材质，即头部133远离阀芯130的一端为圆台结构并采用软质金属材质，圆台结构的侧面133a与限位环内环线150a抵接，以形成线面密封结构，软质金属材质硬度较小，质软，挤压时相对容易发生形变，从而能够 产生较好的密封效果，本方案中利用阀芯130与限位环自身配合密封，不用额外设置密封件174，节省物料成本，也无需在阀芯130或阀体110上开设容置密封件174的凹槽等，简化结构，降低加工和装配难度，保证部件强度，同时还无需担心密封件174脱落或老化而影响密封性的问题，减少检修频率，提升使用体验，延长使用寿命，另外，头部133采用软质金属材质还能起到缓冲作用，以防止头部133与限位环刚性碰撞。
阀芯130可以只有头部133和封口部134采用软质金属材料，阀杆131部位采用不锈钢材料，以保证阀杆131刚度和硬度，减缓螺合时磨损，延长阀芯130使用寿命。
当然，为了便于开模，阀芯130整体都采用软质金属材质，以便于注塑。
此外，如图2所示，截止阀100还包括气门组件170，气门组件170连接于阀体110，在本实施例中，气门组件170与第二开口113相对设置，作为充气入口或放气出口，用于给整个制冷系统补充介质或释放介质。在其他实施例中，气门组件170的轴线还可与第二开口113的轴线垂直设置，气门组件170还可设于主体的其他位置。
气门组件170包括连接体171，连接体171连接于阀体110，连接体171作为介质通入阀体110的通道。
气门组件170还包括气门芯172、罩壳173和密封件174。气门芯172设于连接体171内，能够使得主体的内部与连接体171的内部连通或隔断，罩壳173套设在连接体171的外周侧，用于保护气门芯172，防止外界杂质进入；密封件174位于罩壳173和连接体171之间，与罩壳173配合密封住连接体171。
具体地，气门芯172的一端设有弹性件175，以用于气门芯172的复位。 当气门芯172未受到外界压力时，会保持关闭状态，此时，连接体171保持密封，阻隔阀体110内部与外界；当气门芯172受到压力时，气门芯172挤压弹性件175，并朝向靠近主体的方向运动，从而解除封堵，使得主体内部与连接体171的内部连通，从而使介质可以通入阀体110内部或流出阀体110内部。
本申请的方案具有以下有益效果。本方案中内螺纹套设在安装腔中并靠近阀腔，既避免了内螺纹套的内螺纹被介质冲击和腐蚀，同时，阀体与内螺纹套的配合段也位于阀体内，因而可以将阀芯设计得较短，节省加工物料，提高其运动时的稳定性，进而缩小截止阀整体尺寸。
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，包括阀体和阀芯，所述阀体内设有阀腔以及安装腔，所述安装腔与所述阀腔连通，所述阀芯安装于所述安装腔内，并能够在所述安装腔内运动，以伸入所述阀腔并启/闭所述截止阀，其特征在于，所述截止阀还包括内螺纹套，所述内螺纹套位于所述安装腔内，并靠近所述阀腔设置，所述阀芯与所述内螺纹套螺纹连接。
  2. 根据权利要求1所述的截止阀，其中，所述安装腔远离所述阀腔的一侧开设端口，所述端口处设有限位件，所述阀芯上设有上限位部，所述限位件止挡所述上限位部，以限制所述阀芯向端口方向的移动行程。
  3. 根据权利要求2所述的截止阀，其中，所述阀芯远离所述阀腔的一端的端面形成所述上限位部。
  4. 根据权利要求3所述的截止阀，其中，所述限位件包括沿所述阀体的内壁周向延伸的限位环，所述阀芯远离所述阀腔的一端为圆台结构并采用软质金属材质，所述圆台结构的侧面与所述限位环的内环线抵接，以形成线面密封结构。
  5. 根据权利要求1-4任一项所述的截止阀，其中，所述阀芯包括阀杆和封口部，所述阀杆上设有外螺纹并穿设在所述内螺纹套上，所述阀杆靠近所述阀腔的一侧设有封口部，所述封口部采用软质金属材质，所述封口部伸入所述阀腔并启/闭所述截止阀。
  6. 根据权利要求5所述的截止阀，其中，所述阀芯还包括头部，所述头部设在所述阀杆远离所述阀腔的一端，所述阀体对所述头部阀体周向限位。
  7. 根据权利要求6所述的截止阀，其中，所述头部的外径大于所述阀杆的外径，以在所述头部与所述阀杆之间形成凸环，所述内螺纹套上端面止挡 所述凸环以限制阀芯向阀座方向的移动行程。
  8. 根据权利要求6所述的截止阀，其中，所述头部与所述阀体之间设有密封件，以对所述头部与所述阀体形成周向密封。
  9. 根据权利要求1所述的截止阀，其中，所述内螺纹套与所述截止阀分体设置并固定连接。
  10. 根据权利要求9所述的截止阀，其中，所述阀体的侧面开设第二开口，所述内螺纹套沿所述阀体的径向方向在所述阀体上的投影与所述第二开口沿所述阀体的径向方向在所述阀体上的投影不重叠。
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