WO2024007806A1 - 阀件及其密封结构 - Google Patents

阀件及其密封结构 Download PDF

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Publication number
WO2024007806A1
WO2024007806A1 PCT/CN2023/098936 CN2023098936W WO2024007806A1 WO 2024007806 A1 WO2024007806 A1 WO 2024007806A1 CN 2023098936 W CN2023098936 W CN 2023098936W WO 2024007806 A1 WO2024007806 A1 WO 2024007806A1
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WIPO (PCT)
Prior art keywords
sealing
stuffing box
valve cover
valve
hole section
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PCT/CN2023/098936
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English (en)
French (fr)
Inventor
沈艳宁
孙龙
刘淑伟
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丹佛斯有限公司
沈艳宁
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Application filed by 丹佛斯有限公司, 沈艳宁 filed Critical 丹佛斯有限公司
Publication of WO2024007806A1 publication Critical patent/WO2024007806A1/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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre 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

Definitions

  • the present application relates to the technical field of industrial valves, and in particular to a stuffing box and a valve component provided with the stuffing box.
  • Valve sealing packing refers to materials that are filled to seal between the moving parts of the valve (such as the valve stem) and the fixed parts of the valve (such as the fixed body of the valve), such as cotton cloth, metal rings, asbestos, graphite, various plastics, etc. Common materials used for valve seal packing.
  • a stuffing box is installed between the valve stem and the valve cover.
  • the stuffing box is connected to the valve cover through a threaded connection.
  • the current problem is: when the stuffing box is unscrewed from the valve cover, the stuffing box is removed from the valve cover. When the threads between the stuffing box and the valve cover are completely detached, the stuffing box will easily pop out under the high pressure remaining inside the valve cover, posing a risk of injury.
  • this application provides a valve component and its sealing structure, which can avoid the risk of the stuffing box being ejected by the residual high pressure in the valve cover, causing injury to people.
  • a sealing structure including a stuffing box and a valve cover, in which:
  • the side wall of the stuffing box is provided with external threads and a sealing groove for installing the first sealing ring;
  • the valve cover is provided with a mounting hole for installing the stuffing box.
  • the mounting hole includes a connecting hole section close to the end of the valve cover and a sealing hole section away from the end of the valve cover.
  • the connecting hole section is provided with An internal thread adapted to the external thread, the diameter of the sealing hole section is smaller than the inner diameter of the internal thread, and adapted to the first sealing ring;
  • the axial length of the connection between the external thread and the valve cover is L1
  • the connecting hole section and the The distance between the connection point of the sealing hole section and the lower end surface of the sealing groove is L2, where L1>L2.
  • the end of the connecting hole section for connecting with the sealing hole section is provided with a tapered transition surface.
  • the side wall of the stuffing box with the external thread is provided with a pressure relief groove on the outer surface, and the pressure relief groove extends toward the direction of the sealing groove to the side wall. end.
  • the pressure relief groove is a strip groove, the length direction of which is parallel to the central axis of the external thread.
  • the axial length of the pressure relief groove is L4, L1>L4 and L2>L1-L4.
  • a valve component includes a shaft component, a first sealing ring, and the sealing structure described above, wherein:
  • the shaft member is sleeved and installed in the center hole of the stuffing box;
  • the first sealing ring is located between the stuffing box and the valve cover in the sealing structure, and is located in the sealing groove of the stuffing box.
  • two second sealing rings are provided in the axial direction between the shaft member and the stuffing box.
  • the above valve component further includes an annular gasket located at the bottom of the sealing hole section of the valve cover, and the inner diameter is larger than the diameter of the shaft component.
  • the valve is an industrial refrigeration valve.
  • the first sealing ring when the stuffing box is rotated to remove it from the valve cover, the first sealing ring is tightly connected to the inner wall of the mounting hole of the valve cover.
  • the compressed state of contact changes to a free state of clearance matching with the inner wall of the mounting hole of the valve cover. That is, the sealing state between the stuffing box and the valve cover changes from the sealing state of the first sealing ring to the exhaust state (or called leakage state).
  • the first sealing ring breaks away from the sealing position and reaches the variable cross-section position of the mounting hole of the valve cover (that is, the connection between the sealing hole section and the connecting hole section in the valve cover), it begins to relax and basically returns to its free state.
  • Figure 1 is a cross-sectional view of the assembly structure of the stuffing box and valve cover in the comparison solution. At this time, the stuffing box is completely screwed into the valve cover mounting hole;
  • Figure 2 is a cross-sectional view of the assembly structure of the stuffing box and valve cover in the comparison solution. At this time, part of the threads of the stuffing box are screwed out of the valve cover mounting hole;
  • Figure 3 is a cross-sectional view of the assembly structure of the stuffing box and the valve cover in the embodiment of the present application. At this time, the stuffing box is completely screwed into the valve cover installation hole;
  • Figure 4 is a cross-sectional view of the assembly structure of the stuffing box and the valve cover in the embodiment of the present application. At this time, part of the threads of the stuffing box are screwed out of the valve cover mounting hole;
  • Figure 5 is a side view of the assembly structure of the stuffing box and valve cover in Figure 4;
  • Figure 6 is a side view of the stuffing box in the embodiment of the present application.
  • Figures 1 and 2 are cross-sectional views of the assembly structure of the stuffing box 2' and the valve cover 3' in the comparative scheme.
  • the stuffing box in Figure 1 2' is completely screwed into the mounting hole of the valve cover 3', and part of the thread of the stuffing box 2' in Figure 2 is screwed out of the mounting hole of the valve cover 3'.
  • the stuffing box 2' is set outside the valve stem 1', and a sealing ring, a shaft sleeve, a dust ring and other sealing and dust-proof structures are arranged between the two.
  • the valve cover 3' is set outside the stuffing box 2. 'Externally, the two are threadedly connected, and a first sealing ring 4' (generally an O-ring) is provided.
  • a sealing structure which includes a stuffing box 2 and a valve cover 3 . in:
  • the side wall of the stuffing box 2 is provided with external threads 21 and a sealing groove 22 for installing the first sealing ring 4;
  • the valve cover 3 is provided with a mounting hole for installing the stuffing box 2.
  • the installation hole includes a connecting hole section 301 close to the end of the valve cover and a sealing hole section 302 away from the end of the valve cover.
  • the connecting hole section 301 is provided with a stuffing box.
  • the external thread 21 of the material box 2 is adapted to the internal thread.
  • the diameter of the sealing hole section 302 is smaller than the inner diameter of the internal thread and is adapted to the first sealing ring 4 .
  • the connecting hole section The distance between the junction of 301 and the sealing hole section 302 and the lower end surface of the sealing groove 22 is L2.
  • the lower end surface of the sealing groove 22 is the side of the sealing groove 22 away from the end of the valve cover.
  • the first sealing ring 4 changes from a compressed state in close contact with the inner wall of the installation hole of the valve cover 3 to a gap with the inner wall of the installation hole of the valve cover 3.
  • the free state of fit that is, between the stuffing box 2 and the valve cover 3, changes from the sealing state through the first sealing ring 4 shown in Figure 3 to the exhaust state shown in Figure 4 (or called leakage state).
  • the first sealing ring 4 breaks away from the sealing position and reaches the variable cross-section position of the mounting hole of the valve cover 3 (that is, the junction between the sealing hole section 302 and the connecting hole section 301 in Figure 3), it begins to relax.
  • the free state is basically restored.
  • connection hole section 301 in the valve cover 3 for connecting with the sealing hole section 302 is provided with a tapered transition surface 311, so that the stuffing box 2 can be easily installed into the valve cover. 3 mounting holes.
  • the side wall of the stuffing box 2 with external threads 21 is on the outside.
  • One or more pressure relief grooves 23 are provided on the side, and the pressure relief grooves 23 extend toward the direction of the sealing groove 22 to the end of the side wall. Therefore, when the stuffing box 2 is disassembled, the residual high pressure in the valve cover 3 can be relieved through the pressure relief groove 23 to further avoid the risk of the stuffing box 2 popping out.
  • the pressure relief groove 23 is a strip groove, and its length direction is parallel to the central axis of the external thread 21 .
  • the pressure relief groove 23 can also be arranged in a structure that is inclined relative to the axis of the valve stem, or in other curved structures, which can achieve the above pressure relief effect.
  • valve member which is provided with the sealing structure described above.
  • the valve includes a shaft 1, a stuffing box 2, a valve cover 3, and a first sealing ring 4.
  • the shaft 1 is sleeved and installed in the center hole of the stuffing box 2;
  • the stuffing box 2 is sleeved and installed in the mounting hole of the valve cover 3 and is threadedly connected with it;
  • the first sealing ring 4 is located in the stuffing box 2 in the sealing structure.
  • two second sealing rings are provided along the axial direction between the shaft 1 and the stuffing box 2, that is, a double O-ring design, which can improve the sealing performance of the stuffing box at low temperatures.
  • valve member is also provided with an annular gasket 5 .
  • the annular gasket 5 is located at the bottom of the sealing hole section 302 of the valve cover 3 , and its inner diameter is larger than the diameter of the shaft member 1 .
  • valve component may be an industrial refrigeration valve.
  • the valve component may be an industrial refrigeration valve.
  • it is not limited to this.
  • the above-mentioned sealing structure can also be applied to valves in other fields, and those skilled in the art can make specific designs according to actual needs.

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

Abstract

一种密封结构，该密封结构包括填料函（2）和阀盖（3），其中：填料函（2）的侧壁设置有外螺纹（21）以及用于安装第一密封圈（4）的密封槽（22）；阀盖（3）设置有安装孔；填料函（2）装入阀盖（3）的安装孔内且通过第一密封圈（4）密封时，外螺纹（21）与阀盖（3）连接的轴向长度为L1，安装孔的连接孔段（301）和密封孔段（302）相接处与密封槽（22）下端面之间的距离为L2，其中，L1＞L2。该密封结构能够避免填料函（2）被阀盖（3）内的残存高压弹出导致伤人的风险，同时能够便于填料函从轴上取下；同时包括该密封结构的阀件被公开。

Description

阀件及其密封结构 技术领域
本申请涉及工业阀门技术领域，特别涉及一种填料函，以及一种设置有该填料函的阀件。
背景技术
阀门密封填料是指填充在阀门运动部件(例如阀杆)和阀门固定部件(例如阀门固定机体)之间起到密封作用的材料，例如棉布、金属环、石棉、石墨、各种塑料等均是阀门密封填料所用的常见材料。
在一些阀门结构中，在阀杆和阀盖之间设置填料函，填料函通过螺纹连接的方式连接在阀盖上，目前存在的问题是：在填料函旋出阀盖的过程中，在填料函与阀盖之间的螺纹完全脱离时，填料函在阀盖内部残留的高压作用下容易弹出，存在伤人的风险。
发明内容
为了解决上述问题，本申请提供一种阀件及其密封结构，其能够避免填料函被阀盖内的残存高压弹出导致伤人的风险。
一种密封结构，包括填料函和阀盖，其中：
所述填料函的侧壁设置有外螺纹，以及用于安装第一密封圈的密封槽；
所述阀盖设置有用于安装所述填料函的安装孔，所述安装孔包括靠近阀盖端部的连接孔段和远离所述阀盖端部的密封孔段，所述连接孔段设置有与所述外螺纹适配的内螺纹，所述密封孔段的直径小于所述内螺纹的内径，且与所述第一密封圈适配；
所述填料函装入所述阀盖的安装孔内且通过所述第一密封圈密封时，所述外螺纹与所述阀盖连接的轴向长度为L1，所述连接孔段和所述密封孔段相接处与所述密封槽的下端面之间的距离为L2，其中L1＞L2。
可选地，在上述填料压盖中，所述连接孔段用于与所述密封孔段相接的端部设置有锥形过渡面。
可选地，在上述填料压盖中，所述填料函的具有所述外螺纹的侧壁在外侧面上设置有泄压槽，所述泄压槽朝向所述密封槽的方向延伸至所在侧壁的端部。
可选地，在上述填料压盖中，所述泄压槽为条形槽，其长度方向与所述外螺纹的中心轴线平行。
可选地，在上述填料压盖中，所述泄压槽的轴向长度为L4，L1>L4且L2>L1-L4。
一种阀件，包括轴件、第一密封圈，以及上文中所述的密封结构，其中：
所述轴件套设安装在所述填料函的中心孔内；
所述第一密封圈位于所述密封结构中的填料函和阀盖之间，且位于所述填料函的密封槽内。
可选地，在上述阀件中，所述轴件和所述填料函之间沿轴向设置有两个第二密封圈。
可选地，在上述阀件中，还包括环形垫片，所述环形垫片位于所述阀盖的密封孔段的底部，且内径大于所述轴件的直径。
可选地，所述阀件为工业制冷阀门。
从上述技术方案可以看出，本申请提供的阀件及其密封结构中，在旋转填料函以将其从阀盖中拆卸下来的过程中，第一密封圈由与阀盖的安装孔内壁紧密接触的压缩状态，变为与阀盖的安装孔内壁间隙配合的自由状态，即填料函与阀盖之间，由通过第一密封圈进行密封的密封状态，变为排气状态(或称为泄流状态)。当第一密封圈脱离密封位置到达阀盖的安装孔的变截面位置(即阀盖内的密封孔段和连接孔段相接处)时开始变得松弛，基本恢复自由状态，此时，由于上述L1＞L2，因此填料函的外螺纹中依然有部分螺纹与阀盖的内螺纹保持连接，从而能够避免填料函被阀盖内的残存高压弹 出导致伤人的风险。而且，第一密封圈脱离密封位置由压缩状态变为自由状态后，能够减小旋转填料函时需要克服的摩擦力，从而减小将填料函拔出时需要克服的摩擦力，方便拆卸填料函。
附图说明
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。
图1为对比方案中的填料函与阀盖的组装结构剖视图，此时填料函完全旋入阀盖安装孔内；
图2为对比方案中的填料函与阀盖的组装结构剖视图，此时填料函的部分螺纹旋出阀盖安装孔外；
图3为本申请实施例中的填料函与阀盖的组装结构剖视图，此时填料函完全旋入阀盖安装孔内；
图4为本申请实施例中的填料函与阀盖的组装结构剖视图，此时填料函的部分螺纹旋出阀盖安装孔外；
图5为图4中的填料函与阀盖的组装结构侧视图；
图6为本申请实施例中的填料函的侧视图。
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。
为了方便理解本申请要求保护的技术方案的技术创新点和有益效果，本 申请提供了一个关于阀门结构的对比方案，请参见图1和图2，图1和图2为该对比方案中的填料函2’与阀盖3’的组装结构剖视图，图1中的填料函2’完全旋入阀盖3’的安装孔内，图2中的填料函2’的部分螺纹旋出阀盖3’的安装孔外。
具体请参见图1，填料函2’套设在阀杆1’外，二者之间设置有密封圈、轴套、防尘环等密封防尘结构；阀盖3’套设在填料函2’外，二者之间螺纹连接，且设置有第一密封圈4’(一般为O型密封圈)。
请参见图2，在填料函2’旋出阀盖3’的过程中，当二者之间的螺纹完全脱离时，第一密封圈4’仍然在填料函2’和阀盖3’之间起到密封作用。即填料函2’与阀盖3’之间的螺纹连接长度a等于零时，第一密封圈4’刚好到达或仍未达到阀盖3’的内孔阶梯位置。此时，在阀盖3’内部的系统压力作用下，容易导致填料函2’弹出伤人。从而可见，在上述情况下该结构存在以下问题：
1)由于填料函2’和阀盖3’之间的螺纹已经完全脱离，即填料函2’的螺纹已经完全旋出阀盖3’外，从而在填料函2’下面残留的高压作用下，整个填料函2’容易被弹出，导致伤人风险；
2)由于第一密封圈4’仍然在填料函2’和阀盖3’之间起到密封作用，此时填料函2’和阀盖3’均与第一密封圈4’紧密接触，从而在将填料函2’从阀盖3’内拔出来时需要克服的摩擦力较大，难以将填料函2’从阀盖3’内拔出来。
请参见图3至图6，本申请的具体实施例提供了一种密封结构，该密封结构包括填料函2和阀盖3。其中：
填料函2的侧壁设置有外螺纹21以及用于安装第一密封圈4的密封槽22；
阀盖3设置有用于安装填料函2的安装孔，该安装孔包括靠近阀盖端部的连接孔段301和远离阀盖端部的密封孔段302，连接孔段301设置有与填 料函2的外螺纹21适配的内螺纹，密封孔段302的直径小于该内螺纹的内径，且与第一密封圈4适配。
当填料函2装入阀盖3的安装孔内，且通过第一密封圈4密封时，设填料函2的外螺纹21与阀盖3的内螺纹连接的轴向长度为L1，连接孔段301和密封孔段302相接处与密封槽22的下端面之间的距离为L2，如图3所示，密封槽22的下端面为密封槽22远离阀盖端部的侧面。此时应满足L1＞L2，即L1-L2＞0。
在旋转填料函2以将其从阀盖3中拆卸下来的过程中，第一密封圈4由与阀盖3的安装孔内壁紧密接触的压缩状态，变为与阀盖3的安装孔内壁间隙配合的自由状态，即填料函2与阀盖3之间，由图3中所示的通过第一密封圈4进行密封的密封状态，变为图4中所示的排气状态(或称为泄流状态)。请参见图4，当第一密封圈4脱离密封位置到达阀盖3的安装孔的变截面位置(即图3中的密封孔段302和连接孔段301相接处)时开始变得松弛，基本恢复自由状态，此时，由于L1＞L2，L1与L2之间的差值即L3＞0，因此填料函2的外螺纹21中依然有部分螺纹与阀盖3的内螺纹保持连接，从而能够避免填料函2被阀盖1内的残存高压弹出导致伤人的风险。而且，第一密封圈4脱离密封位置由压缩状态变为自由状态后，能够减小旋转填料函2时需要克服的摩擦力，从而减小将填料函2拔出时需要克服的摩擦力，方便拆卸填料函2。
相比之下，请参见图2，对比方案中，当第一密封圈4’脱离密封状态时，填料函2’与阀盖3’之间的螺纹连接长度a’等于零，从而存在填料函2’弹出伤人的风险。
具体实施时，请参见图3，阀盖3内的连接孔段301用于与密封孔段302相接的端部设置有锥形过渡面311，从而能够方便地将填料函2装入阀盖3的安装孔内。
进一步地，请参见图3至图6，填料函2的具有外螺纹21的侧壁在外 侧面上设置有一个或多个泄压槽23，泄压槽23朝向密封槽22的方向延伸至所在侧壁的端部。从而，在拆卸填料函2时，能够通过泄压槽23对阀盖3内的残存高压进行泄压，进一步避免填料函2弹出风险。
具体实施时，请参见图3和图4，若泄压槽23的轴向长度为L4，则需要满足L1>L4且L2>L1-L4，从而保证当填料函2向外旋出而使得泄压槽23部分露出于阀盖3外时，填料函2和阀盖3之间仍然有部分螺纹处于旋紧状态。从而，在将填料函2从阀盖3内拆卸下来的过程中，当第一密封圈4脱离密封位置由压缩状态变为自由状态，并且填料函2和阀盖3之间仍有部分螺纹处于旋紧状态时，阀盖3内位于填料函2下方的残余压力可以通过泄压槽23排出，从而消除了残存压力将填料函弹出造成伤人的危险。
具体实施时，泄压槽23为条形槽，其长度方向与外螺纹21的中心轴线平行。但是并不局限于此，在其他具体实施例中，也可以将泄压槽23设置成相对阀杆轴线倾斜的结构，或其他曲线结构，均能够实现上述泄压效果。
综上，本申请实施例还提供了一种阀件，其设置有上文中所述的密封结构。具体请参见图3至图6，该阀件包括轴件1、填料函2、阀盖3、第一密封圈4。其中：轴件1套设安装在填料函2的中心孔内；填料函2套设安装在阀盖3的安装孔内，且与其螺纹连接；第一密封圈4位于密封结构中的填料函2和阀盖3之间，且位于填料函2的密封槽22内。
具体实施时，轴件1和填料函2之间沿轴向设置有两个第二密封圈，即双O圈设计，可以提高低温时填料函的密封性。
具体实施时，上述阀件中还设置有环形垫片5，该环形垫片5位于阀盖3的密封孔段302的底部，其内径大于轴件1的直径。
具体实施例中，该阀件可以是工业制冷阀门。但是并不局限于此，上述密封结构也可以适用于其他领域的阀件中，本领域技术人员可根据实际需要进行具体设计。
最后，还需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本申请。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本申请的精神或范围的情况下，在其它实施例中实现。因此，本申请将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (9)

  1. 一种密封结构，包括填料函(2)和阀盖(3)，其特征在于：
    所述填料函(2)的侧壁设置有外螺纹(21)以及用于安装第一密封圈(4)的密封槽(22)；
    所述阀盖(3)设置有用于安装所述填料函(2)的安装孔，所述安装孔包括靠近阀盖端部的连接孔段(301)和远离所述阀盖端部的密封孔段(302)，所述连接孔段(301)设置有与所述外螺纹(21)适配的内螺纹，所述密封孔段(302)的直径小于所述内螺纹的内径，且与所述第一密封圈(4)适配；
    所述填料函(2)装入所述阀盖(3)的安装孔内且通过所述第一密封圈(4)密封时，所述外螺纹(21)与所述阀盖(3)连接的轴向长度为L1，所述连接孔段(301)和所述密封孔段(302)相接处与所述密封槽(22)下端面之间的距离为L2，其中，L1＞L2。
  2. 根据权利要求1所述的密封结构，其特征在于，所述连接孔段(301)用于与所述密封孔段(302)相接的端部设置有锥形过渡面(311)。
  3. 根据权利要求1或2所述的密封结构，其特征在于，所述填料函(2)的具有所述外螺纹(21)的侧壁在外侧面上设置有泄压槽(23)，所述泄压槽(23)朝向所述密封槽(22)的方向延伸至所在侧壁的端部。
  4. 根据权利要求3所述的密封结构，其特征在于，所述泄压槽(23)为条形槽，其长度方向与所述外螺纹(21)的中心轴线平行。
  5. 根据权利要求3所述的密封结构，其特征在于，所述泄压槽(23)的轴向长度为L4，L1>L4且L2>L1-L4。
  6. 一种阀件，其特征在于，包括轴件(1)、第一密封圈(4)，以及如权利要求1至5任一项所述的密封结构，其中：
    所述轴件(1)套设安装在所述填料函(2)的中心孔内；
    所述第一密封圈(4)位于所述密封结构中的填料函(2)和阀盖(3)之间，且位于所述填料函(2)的密封槽(22)内。
  7. 根据权利要求6所述的阀件，其特征在于，所述轴件(1)和所述填料函(2)之间沿轴向设置有两个第二密封圈。
  8. 根据权利要求6所述的阀件，其特征在于，还包括环形垫片(5)，所述环形垫片(5)位于所述阀盖(3)的密封孔段(302)的底部，且内径大于所述轴件(1)的直径。
  9. 根据权利要求6所述的阀件，其特征在于，所述阀件为工业制冷阀门。
PCT/CN2023/098936 2022-07-06 2023-06-07 阀件及其密封结构 WO2024007806A1 (zh)

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CN112360982A (zh) * 2020-11-30 2021-02-12 宁波天生密封件有限公司 一种轴密封装置及其使用方法
CN218118816U (zh) * 2022-07-06 2022-12-23 丹佛斯有限公司 阀件及其密封结构

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CN201925593U (zh) * 2011-01-24 2011-08-10 宁夏英奥特流体控制技术有限公司 阀门旋入式填料函装置
CN112360982A (zh) * 2020-11-30 2021-02-12 宁波天生密封件有限公司 一种轴密封装置及其使用方法
CN218118816U (zh) * 2022-07-06 2022-12-23 丹佛斯有限公司 阀件及其密封结构

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