WO2024066141A1 - 燃气切断阀 - Google Patents

燃气切断阀 Download PDF

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Publication number
WO2024066141A1
WO2024066141A1 PCT/CN2023/072352 CN2023072352W WO2024066141A1 WO 2024066141 A1 WO2024066141 A1 WO 2024066141A1 CN 2023072352 W CN2023072352 W CN 2023072352W WO 2024066141 A1 WO2024066141 A1 WO 2024066141A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
valve
cover plate
elastic
gas shut
Prior art date
Application number
PCT/CN2023/072352
Other languages
English (en)
French (fr)
Inventor
刘学勇
Original Assignee
宁波金盾电子工业股份有限公司
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 宁波金盾电子工业股份有限公司 filed Critical 宁波金盾电子工业股份有限公司
Publication of WO2024066141A1 publication Critical patent/WO2024066141A1/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
    • F16K27/02—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
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • 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
    • 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
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing

Definitions

  • the present application belongs to the technical field related to gas valves, and in particular, relates to a gas shut-off valve.
  • the gas shut-off valve is usually linked to the gas alarm. Once the gas shut-off valve receives the signal from the gas alarm, it will work and cut off the gas channel to avoid related accidents caused by gas leakage.
  • the sealing member used to seal the gas in the gas shut-off valve of the related art is directly matched with the plastic base in the gas shut-off valve and plays a sealing role. Since the sealing member is used in the gas shut-off valve, it will be pushed up by the spring, so that the plastic base in the gas shut-off valve of the related art is always subjected to force. However, the compressive strength of the plastic base is limited. With the extension of the use time, environmental pollution and the pressure, the plastic base will age to varying degrees, thereby causing the gas shut-off valve to leak as a whole.
  • a gas shut-off valve is provided.
  • the present application provides a gas shut-off valve, including a valve seat, a valve stem, an elastic sealing mechanism and a plastic bottom
  • the valve stem passes through the plastic base and extends into the valve seat, and is connected with the elastic sealing mechanism.
  • the gas shut-off valve further comprises a sealing cover plate, which is mounted on the valve seat.
  • the elastic sealing mechanism is arranged between the valve seat and the sealing cover plate, wherein one end of the elastic sealing mechanism facing away from the valve seat abuts against the sealing cover plate.
  • the sealing cover plate is partially bent in a direction away from the valve seat to form a bent portion, and the elastic sealing mechanism is disposed between the bent portion and the valve seat.
  • the sealing cover plate is configured as a metal cover plate.
  • the gas shut-off valve further comprises a sealing seat, which is arranged between the sealing cover plate and the elastic sealing mechanism and is sleeved onto the valve stem; wherein a sealing ring is arranged between the sealing seat and the valve stem.
  • the gas shut-off valve further includes a sealing member, the sealing member having a first part and a second part, the first part being arranged between the sealing cover plate and the valve seat so that the sealing cover plate and the valve seat are assembled and sealed; the second part being arranged between the sealing seat and the elastic sealing mechanism.
  • the sealing member further has a third portion, and the third portion and the first portion are spaced apart along the radial direction of the valve stem; wherein the third portion is disposed between the sealing cover plate and the valve seat to seal the sealing cover plate and the valve seat.
  • the elastic sealing mechanism includes an elastic support seat, an elastic member and a sealing assembly, wherein the sealing assembly is axially limitedly mounted on the valve stem, wherein the elastic member is sleeved on the valve stem and abuts against the elastic support seat and the sealing assembly respectively, so that the The valve stem can control the on/off of the valve seat through the sealing assembly.
  • the sealing assembly includes a sealing gasket and a sealing liner, and the sealing gasket can be installed on the valve stem through the sealing liner.
  • the elastic sealing mechanism further includes an elastic limiting plate, and the elastic limiting plate is arranged between the elastic member and the sealing assembly.
  • FIG. 1 is a schematic structural diagram of a gas shut-off valve according to one or more embodiments.
  • FIG. 2 is a partially exploded view of a gas shutoff valve according to one or more embodiments.
  • FIG 3 is a partial cross-sectional view of a gas shut-off valve according to one or more embodiments.
  • FIG. 4 is a partial schematic diagram of FIG. 3 .
  • FIG. 5 is a cross-sectional view of a seal according to one or more embodiments.
  • 100 gas shut-off valve; 10, valve seat; 20, valve stem; 30, sealing cover plate; 301, metal cover plate; 31, bending portion; 40, elastic sealing mechanism; 41, elastic support seat; 42, elastic member; 43, sealing assembly; 431, sealing gasket; 432, sealing liner; 44, elastic limit plate; 50, plastic base; 60, sealing seat; 61, sealing ring; 70, sealing member; 71, first part; 72, second part; 73, third part; 310, locking member.
  • an element when an element is referred to as being “provided on” another element, it may be directly provided on the other element or there may be a central element. When an element is considered to be “provided on” another element, it may be directly provided on the other element or there may be a central element at the same time. When an element is considered to be “fixed to” another element, it may be directly fixed on the other element or there may be a central element at the same time.
  • a gas shut-off valve 100 provided in an embodiment of the present application includes a valve seat 10, a valve stem 20, a sealing cover plate 30, an elastic sealing mechanism 40 and a plastic base 50.
  • the valve stem 20 extends through the plastic base 50 into the valve seat 10 and is connected to the elastic sealing mechanism 40.
  • the sealing cover plate 30 is installed on the valve seat 10, and the elastic sealing mechanism 40 is arranged between the valve seat 10 and the sealing cover plate 30, wherein one end of the elastic sealing mechanism 40 that is away from the valve seat 10 abuts against the sealing cover plate 30.
  • the elastic sealing mechanism 40 in the gas shut-off valve 100 of the present application is specifically pressed and limited on the valve seat 10 by the sealing cover plate 30, which makes the sealing cover plate 30 bear the pressure of the elastic sealing mechanism 40, and the gas shut-off valve 100
  • the plastic base 50 is not subjected to pressure, which can extend the service life of the plastic base 50 and avoid leakage problems caused by aging of the plastic base 50.
  • the sealing cover plate 30 is used to bear pressure, which can also improve the overall pressure resistance of the gas shut-off valve 100 during operation.
  • the above-mentioned plastic base 50 is specifically fixedly installed on the sealing cover plate 30, and the valve stem driving mechanism (not shown) for controlling the lifting and lowering movement of the valve stem 20 in the gas shut-off valve 100 is specifically installed in the plastic base 50; of course, when the gas shut-off valve 100 is working, how to realize the mechanical structure and electrical structure of the control of the lifting and lowering movement of the valve stem 20 can adopt the conventional structure in the relevant technology, which will not be elaborated here.
  • the sealing cover plate 30 is partially bent in a direction away from the valve seat 10 to form a bent portion 31, and the elastic sealing mechanism 40 is disposed between the bent portion 31 and the valve seat 10, thereby specifically realizing the assembly connection of the sealing cover plate 30 on the valve seat 10.
  • the bent portion 31 is disposed on the sealing cover plate 30 to provide sufficient installation space for the installation of the elastic sealing mechanism 40 between the sealing cover plate 30 and the valve seat 10, so as to meet the use requirements of the gas shut-off valve 100.
  • the gas shut-off valve 100 also includes a locking piece 310, the sealing cover plate 30 is abutted against the valve seat 10 and is locked by the locking piece 310; wherein the above-mentioned locking piece 310 is specifically configured as a countersunk screw, and the number of the countersunk screws is multiple, so as to improve the stability of the installation of the sealing cover plate 30 on the valve seat 10.
  • the sealing cover plate 30 is set as a metal cover plate 301, so as to specifically implement the material setting of the sealing cover plate 30.
  • the overall structural strength of the sealing cover plate 30 is ensured to meet the use requirements of the gas shut-off valve 100.
  • the above-mentioned sealing cover plate 30 is not limited to using a metal cover plate 301 with a certain strength.
  • the sealing cover plate 30 can also be set as other plastic materials with high-strength structure, which will not be elaborated here.
  • the elastic sealing mechanism 40 includes an elastic support seat 41, an elastic member 42 and a sealing assembly 43.
  • the sealing assembly 43 is axially limitedly mounted on the valve stem 20, wherein the elastic member 42 is sleeved on the valve stem 20 and abuts against the elastic support seat 41 and the sealing assembly 43, respectively, so as to The valve stem 20 can control the on/off of the valve seat 10 through the sealing assembly 43, thereby specifically realizing the structural setting of the elastic sealing mechanism 40.
  • the elastic member 42 is set as a spring.
  • the sealing assembly 43 is axially limitedly installed on the valve stem 20 means that the sealing assembly 43 is fixedly installed on the valve stem 20, and the valve stem 20 axially limits the sealing assembly 43.
  • the sealing assembly 43 includes a sealing gasket 431 and a sealing liner 432, and the sealing gasket 431 can be installed on the valve stem 20 through the sealing gasket 432, so as to specifically realize the structural setting of the sealing assembly 43.
  • the sealing gasket 432 is a rigid structure, wherein the sealing gasket 432 is specifically installed on the valve stem 20 in a clamping manner.
  • the elastic sealing mechanism 40 also includes an elastic limiting plate 44, which is arranged between the elastic member 42 and the sealing assembly 43, so that the elastic member 42 can push the sealing assembly through the elastic limiting plate 44, thereby improving the balance of force on the sealing assembly 43 when it is pushed by the elastic member 42, ensuring that the valve seat 10 can be cut off when the sealing assembly 43 acts on the valve seat 10.
  • the gas shut-off valve 100 further includes a sealing seat 60, which is disposed between the sealing cover plate 30 and the elastic sealing mechanism 40 and is mounted on the valve stem 20.
  • a sealing ring 61 is disposed between the sealing seat 60 and the valve stem 20, and the sealing ring 61 is used to achieve assembly sealing between the sealing seat 60 and the valve stem 20, thereby achieving assembly sealing between the valve stem 20 and the sealing cover plate 30.
  • the sealing seat 60 is specifically configured as a metal part or a high-strength non-metal part.
  • sealing rings 61 which are spaced apart along the axial direction of the valve stem 20, so that the sealing performance of the assembly between the valve stem 20 and the sealing cover plate 30 can be further improved.
  • the number of sealing rings 61 in the gas shut-off valve 100 of the present application is specifically two.
  • the number of sealing rings 61 is not limited to that shown in the figure.
  • the number of sealing rings 61 can be set to one, three, or even more.
  • the gas shut-off valve 100 further includes a sealing member 70.
  • the sealing member 70 has a A first part 71 and a second part 72, the first part 71 is arranged between the sealing cover plate 30 and the valve seat 10 to make the sealing cover plate 30 and the valve seat 10 assembled and sealed, and the second part 72 is arranged between the sealing seat 60 and the elastic sealing mechanism 40.
  • the structural characteristics of the sealing member 70 can be utilized to seal and buffer the abutment between the elastic sealing mechanism 40 and the sealing seat 60.
  • the sealing member 70 also has a third portion 73, and the third portion 73 and the first portion 71 are arranged at intervals along the radial direction of the valve stem 20.
  • the third portion 73 is arranged between the sealing cover plate 30 and the valve seat 10 to seal the sealing cover plate 30 and the valve seat 10. That is to say, the sealing cover plate 30 of the present application and the valve seat 10 have two seals, namely, the first portion 71 and the third portion 73 on the sealing member 70, so that the sealing performance of the assembly between the sealing cover plate 30 and the valve seat 10 can be ensured.
  • the gas shut-off valve 100 for which protection is requested in the present application uses a sealing cover plate 30 to press and limit the elastic sealing mechanism 40 on the valve seat 10, so that the sealing cover plate 30 is subjected to the pressure of the elastic sealing mechanism 40, while the plastic base 50 in the gas shut-off valve 100 is not subjected to pressure, thereby extending the service life of the plastic base 50 and avoiding leakage problems caused by aging of the plastic base 50; at the same time, using the sealing cover plate 30 to bear pressure can also improve the pressure resistance of the gas shut-off valve 100 as a whole during operation.

Abstract

一种燃气切断阀(100)。该燃气切断阀(100)包括阀座(10)、阀杆(20)、弹性密封机构(40)、塑料底座(50)及密封盖板(30)，阀杆(20)穿过塑料底座(50)，并与弹性密封机构(40)连接；密封盖板(30)安装于阀座(10)，弹性密封机构(40)设置于阀座(10)与密封盖板(30)之间，其中，弹性密封机构(40)上背离阀座(10)的一端抵靠在密封盖板(30)上。

Description

燃气切断阀
相关申请
本申请要求2022年9月28日申请的，申请号为202222602944.9，发明名称为“燃气切断阀”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
本申请属于燃气阀门相关的技术领域，特别是涉及一种燃气切断阀。
背景技术
燃气切断阀，通常与燃气报警器联动，一旦燃气切断阀接收到燃气报警器发出的信号后，燃气切断阀工作并将燃气通道切断，以避免因燃气泄漏而引发的相关事故。
目前，相关技术的燃气切断阀中用以密封燃气的密封件是直接与该燃气切断阀中塑料底座相配合，并起到密封的作用，由于密封件应用在燃气切断阀中会受到弹簧的推顶，这使得相关技术的燃气切断阀中塑料底座始终受到力的作用。然而，塑料底座的抗压力强度是有限的，随着使用时间的延长、环境的污染和受到压力的大小，塑料底座会出现不同程度的老化，从而引发该燃气切断阀整体出现泄漏。
发明内容
根据本申请的各种实施例，提供一种燃气切断阀。
本申请提供一种燃气切断阀，包括阀座、阀杆、弹性密封机构及塑料底 座，所述阀杆穿过所述塑料底座伸入至所述阀座内，并与所述弹性密封机构连接。
所述燃气切断阀还包括密封盖板，所述密封盖板安装于所述阀座，所述弹性密封机构设置于所述阀座与所述密封盖板之间，其中，所述弹性密封机构上背离所述阀座的一端抵靠在所述密封盖板上。
在其中一个实施例中，所述密封盖板朝远离所述阀座的方向部分弯折并形成有弯折部，且所述弹性密封机构设置于所述弯折部与所述阀座之间。
在其中一个实施例中，所述密封盖板设置为金属盖板。
在其中一个实施例中，所述燃气切断阀还包括密封座，所述密封座设置于所述密封盖板与所述弹性密封机构之间，并套装至所述阀杆上；其中，所述密封座与所述阀杆之间设置有密封圈。
在其中一个实施例中，所述密封圈的数量为多个，多个所述密封圈沿所述阀杆的轴向方向间隔设置。
在其中一个实施例中，所述燃气切断阀还包括密封件，所述密封件具有第一部和第二部，所述第一部设置于所述密封盖板与所述阀座之间，以使所述密封盖板与所述阀座装配密封；所述第二部设置于所述密封座与所述弹性密封机构之间。
在其中一个实施例中，所述密封件还具有第三部，所述第三部与所述第一部沿着所述阀杆的径向方向间隔设置；其中，所述第三部设置于所述密封盖板与所述阀座之间，用以密封所述密封盖板与所述阀座。
在其中一个实施例中，所述弹性密封机构包括弹性支撑座、弹性件及密封组件，所述密封组件轴向限位地安装于所述阀杆，其中，所述弹性件套装于所述阀杆，并分别与所述弹性支撑座及所述密封组件抵接配合，以使所述 阀杆能够通过所述密封组件控制所述阀座的通/断。
在其中一个实施例中，所述密封组件包括密封垫及密封衬垫，所述密封垫能够通过所述密封衬垫安装于所述阀杆上。
在其中一个实施例中，所述弹性密封机构还包括弹性限位片，所述弹性限位片设置于所述弹性件与所述密封组件之间。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其它特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更好地描述和说明这里公开的那些发明的实施例和/或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例和/或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。
图1为根据一个或多个实施例的燃气切断阀的结构示意图。
图2为根据一个或多个实施例的燃气切断阀的局部分解图。
图3为根据一个或多个实施例的燃气切断阀的局部剖视图。
图4为图3的局部示意图。
图5为根据一个或多个实施例中密封件的剖视图。
附图标记，100、燃气切断阀；10、阀座；20、阀杆；30、密封盖板；301、金属盖板；31、弯折部；40、弹性密封机构；41、弹性支撑座；42、弹性件；43、密封组件；431、密封垫；432、密封衬垫；44、弹性限位片；50、塑料底座；60、密封座；61、密封圈；70、密封件；71、第一部；72、第二部；73、第三部；310、锁定件。
具体实施方式
下面将结合本申请实施方式中的附图，对本申请实施方式中的技术方案进行清楚、完整地描述，显然，所描述的实施方式仅仅是本申请一部分实施方式，而不是全部的实施方式。基于本申请中的实施方式，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方式，都属于本申请保护的范围。
需要说明的是，当元件被称为“设于”另一个元件，它可以直接设在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“设置于”另一个元件，它可以是直接设置在另一个元件上或者可能同时存在居中元件。当一个元件被认为是“固定于”另一个元件，它可以是直接固定在另一个元件上或者可能同时存在居中元件。
除非另有定义，本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本申请。本申请所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
如图1至图4所示，本申请一实施例所提供的燃气切断阀100，包括阀座10、阀杆20、密封盖板30、弹性密封机构40及塑料底座50，阀杆20穿过塑料底座50伸入至阀座10内，并与弹性密封机构40连接。密封盖板30安装于阀座10，弹性密封机构40设置于阀座10与密封盖板30之间，其中，弹性密封机构40上背离阀座10的一端抵靠在密封盖板30上。也就是说，本申请的燃气切断阀100中弹性密封机构40具体用密封盖板30压紧限位在阀座10上，这使得密封盖板30承受弹性密封机构40的压力，而该燃气切断阀100 中塑料底座50不受压，这样能够延长塑料底座50的使用寿命，避免因塑料底座50老化而引发的泄漏问题。与此同时，用密封盖板30承压，还能够提高该燃气切断阀100整体在工作时的抗压性。需要说明的是，上述的塑料底座50具体是固定地安装于密封盖板30上，且该燃气切断阀100中用于控制阀杆20升降运动的阀杆驱动机构(图未示)具体是安装于该塑料底座50内；当然了，该燃气切断阀100工作时，如何实现对阀杆20升降运动控制的机械结构及电气结构均可采用相关技术中的常规结构，在此就不展开阐述。
如图2所示，在一实施例中，密封盖板30朝远离阀座10的方向部分弯折并形成有弯折部31，且弹性密封机构40设置于弯折部31与阀座10之间，以此具体实现密封盖板30在阀座10上的装配连接。在密封盖板30上设置弯折部31，以为弹性密封机构40在密封盖板30与阀座10之间的安装提供足够的安装空间，以满足燃气切断阀100的使用需求。
其中，燃气切断阀100还包括锁定件310，密封盖板30贴靠在阀座10上，并通过锁定件310进行锁定；其中，上述锁定件310具体设置为沉头螺钉，且沉头螺钉的数量为多颗，以提高密封盖板30在阀座10上安装的稳定性。
具体地，密封盖板30设置为金属盖板301，以此具体实现该密封盖板30的材质设置，利用密封盖板30的材质特性，确保了该密封盖板30整体的结构强度，以满足燃气切断阀100的使用需求。需要说明的是，上述密封盖板30不局限为采用具有一定强度的金属盖板301，对本领域技术人员来说，也可将密封盖板30设置为其它具有高强度结构的塑料材质，在此就不展开阐述。
如图3、图4所示，在一实施例中，弹性密封机构40包括弹性支撑座41、弹性件42及密封组件43，密封组件43轴向限位地安装于阀杆20，其中，弹性件42套装于阀杆20，并分别与弹性支撑座41及密封组件43抵接配合，以 使阀杆20能够通过密封组件43控制阀座10的通/断，以此具体实现该弹性密封机构40的结构设置。需要说明的是，上述弹性件42设置为弹簧。密封组件43轴向限位地安装于阀杆20是指密封组件43固定安装于阀杆20，且阀杆20对密封组件43进行轴向限位。
其中，密封组件43包括密封垫431及密封衬垫432，密封垫431能够通过密封衬垫432安装于阀杆20上，以此具体实现该密封组件43的结构设置。需要说明的是，密封衬垫432为刚性结构，其中，该密封衬垫432具体以卡接的方式安装于阀杆20上。
进一步地，弹性密封机构40还包括弹性限位片44，弹性限位片44设置于弹性件42与密封组件43之间，使得弹性件42能够通过弹性限位片44抵推密封组件，这样能够提高密封组件43在受弹性件42抵推时受力的均衡性，确保密封组件43作用于阀座10时可实现对阀座10的切断。
如图1和图2所示，燃气切断阀100还包括密封座60，密封座60设置于密封盖板30与弹性密封机构40之间，并套装至阀杆20上。其中，密封座60与阀杆20之间设置有密封圈61，利用密封圈61实现对密封座60与阀杆20之间的装配密封，进而实现对阀杆20与密封盖板30之间的装配密封。需要说明的是，上述密封座60具体设置为金属件或者高强度的非金属件。
进一步地，密封圈61的数量为多个，多个密封圈61沿阀杆20的轴向方向间隔设置，这样能够进一步提高阀杆20与密封盖板30之间装配的密封性。需要说明的是，本申请的燃气切断阀100中密封圈61的数量具体为两个，当然了，密封圈61的数量不局限为图示所示，对本领域技术人员来说，可将密封圈61的数量设置为一个，三个、甚至更多个。
如图3至图5所示，燃气切断阀100还包括密封件70，密封件70具有第 一部71和第二部72，第一部71设置于密封盖板30与阀座10之间，以使密封盖板30与阀座10装配密封，第二部72设置于密封座60与弹性密封机构40之间，这样利用密封件70的结构特性，能够对弹性密封机构40与密封座60之间的抵接起到密封和缓冲的作用。
进一步地，密封件70还具有第三部73，第三部73与第一部71沿着阀杆20的径向方向间隔设置。其中，第三部73设置于密封盖板30与阀座10之间，用以密封密封盖板30与阀座10，也就是说，本申请的密封盖板30与阀座10之间具有密封件70上第一部71及第三部73这两道密封，这样能够确保密封盖板30与阀座10之间装配的密封性。
综上所述，本申请请求保护的燃气切断阀100，用密封盖板30将弹性密封机构40压紧限位在阀座10上，这使得密封盖板30承受弹性密封机构40的压力，而该燃气切断阀100中塑料底座50不受压，这样能够延长塑料底座50的使用寿命，避免因塑料底座50老化而引发的泄漏问题；与此同时，用密封盖板30承压，还能够提高该燃气切断阀100整体工作时的抗压性。
以上实施方式的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施方式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。
本技术领域的普通技术人员应当认识到，以上的实施方式仅是用来说明本申请，而并非用作为对本申请的限定，只要在本申请的实质精神范围内，对以上实施方式所作的适当改变和变化都落在本申请要求保护的范围内。

Claims (10)

  1. 一种燃气切断阀，包括阀座、阀杆、弹性密封机构及塑料底座，所述阀杆穿过所述塑料底座伸入至所述阀座内，并与所述弹性密封机构连接；其特征在于，
    所述燃气切断阀还包括密封盖板，所述密封盖板安装于所述阀座，所述弹性密封机构设置于所述阀座与所述密封盖板之间，其中，所述弹性密封机构上背离所述阀座的一端抵靠在所述密封盖板上。
  2. 根据权利要求1所述的燃气切断阀，其中，所述密封盖板朝远离所述阀座的方向部分弯折并形成有弯折部，且所述弹性密封机构设置于所述弯折部与所述阀座之间。
  3. 根据权利要求1所述的燃气切断阀，其中，所述密封盖板设置为金属盖板。
  4. 根据权利要求1所述的燃气切断阀，其中，所述燃气切断阀还包括密封座，所述密封座设置于所述密封盖板与所述弹性密封机构之间，并套装至所述阀杆上；
    其中，所述密封座与所述阀杆之间设置有密封圈。
  5. 根据权利要求4所述的燃气切断阀，其中，所述密封圈的数量为多个，多个所述密封圈沿所述阀杆的轴向方向间隔设置。
  6. 根据权利要求4所述的燃气切断阀，其中，所述燃气切断阀还包括密封件，所述密封件具有第一部和第二部，所述第一部设置于所述密封盖板与所述阀座之间，以使所述密封盖板与所述阀座装配密封；
    所述第二部设置于所述密封座与所述弹性密封机构之间。
  7. 根据权利要求6所述的燃气切断阀，其中，所述密封件还具有第三部，所述第三部与所述第一部沿着所述阀杆的径向方向间隔设置；
    其中，所述第三部设置于所述密封盖板与所述阀座之间，用以密封所述密封盖板与所述阀座。
  8. 根据权利要求1所述的燃气切断阀，其中，所述弹性密封机构包括弹性支撑座、弹性件及密封组件，所述密封组件轴向限位地安装于所述阀杆上，其中，所述弹性件套装于所述阀杆，并分别与所述弹性支撑座及所述密封组件抵接配合，以使所述阀杆能够通过所述密封组件控制所述阀座的通/断。
  9. 根据权利要求8所述的燃气切断阀，其中，所述密封组件包括密封垫及密封衬垫，所述密封垫能够通过所述密封衬垫安装于所述阀杆上。
  10. 根据权利要求8所述的燃气切断阀，其中，所述弹性密封机构还包括弹性限位片，所述弹性限位片设置于所述弹性件与所述密封组件之间。
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