WO2020211800A1 - 一种气动截流装置用橡胶套筒及气动截流装置 - Google Patents

一种气动截流装置用橡胶套筒及气动截流装置 Download PDF

Info

Publication number
WO2020211800A1
WO2020211800A1 PCT/CN2020/085034 CN2020085034W WO2020211800A1 WO 2020211800 A1 WO2020211800 A1 WO 2020211800A1 CN 2020085034 W CN2020085034 W CN 2020085034W WO 2020211800 A1 WO2020211800 A1 WO 2020211800A1
Authority
WO
WIPO (PCT)
Prior art keywords
rubber sleeve
groove
pneumatic
shutoff device
wall thickness
Prior art date
Application number
PCT/CN2020/085034
Other languages
English (en)
French (fr)
Inventor
周超
李习洪
Original Assignee
武汉圣禹排水***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 武汉圣禹排水***有限公司 filed Critical 武汉圣禹排水***有限公司
Publication of WO2020211800A1 publication Critical patent/WO2020211800A1/zh

Links

Images

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
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/02—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm
    • F16K7/04—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm constrictable by external radial force
    • F16K7/07—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm constrictable by external radial force by means of fluid pressure

Definitions

  • the present disclosure relates to the technical field of drainage, in particular to a rubber sleeve for a pneumatic interception device and a pneumatic interception device.
  • the pneumatic shut-off device on the market includes an outer cover and a rubber sleeve.
  • the outer cover and the rubber sleeve are sealed and connected to form an air cavity.
  • the outer cover is provided with an air inlet.
  • the rubber sleeve has a certain elasticity.
  • the air cavity is filled with compressed gas, The gas pressure causes the rubber sleeve to shrink inward to realize the action of closing the interception channel.
  • the air cavity releases pressurized gas the rubber sleeve recovers its deformation and realizes the action of opening the interception channel.
  • the structure of the rubber sleeve in the prior art is relatively simple. In order to achieve zero leakage in the closed state of the rubber sleeve, a relatively large air pressure is used.
  • the purpose of the present disclosure is to overcome the deficiencies of the above-mentioned background technology and provide a rubber sleeve for a pneumatic shut-off device and a pneumatic shut-off device, which can achieve zero leakage under a lower gas pressure and have a good sealing effect.
  • the present invention provides a rubber sleeve for a pneumatic shut-off device.
  • the rubber sleeve is provided with circulation channels penetrating both ends of the rubber sleeve, and grooves are provided along the outer surface of the rubber sleeve in the circumferential direction.
  • the rubber sleeve is provided with inward protrusions.
  • the rubber sleeve at the raised position and the rubber sleeve at other positions are integrally formed by vulcanization.
  • the wall thickness of the rubber sleeve at the groove position is not greater than the wall thickness of the rubber sleeve at other positions; or, the wall thickness of the rubber sleeve at the groove position is the same as The wall thickness of the rubber sleeve at other positions is the same; or, the depth of the groove is the same as the wall thickness of the rubber sleeve at other positions; or, the depth of the groove is the same as that of the rubber sleeve at other positions.
  • the cross-sectional shape of the groove is a trapezoid; and/or the cross-sectional shape of the protrusion is a trapezoid.
  • the hardness of the rubber sleeve at the protrusion position is lower than the hardness of the rubber sleeve at other positions.
  • the height of the protrusion ranges from 10 mm to 80 mm.
  • the ring width of the protrusion is 30-200 mm.
  • the groove is provided in the middle of the rubber sleeve.
  • the two ends of the rubber sleeve are provided with flange connection parts protruding outward.
  • a pneumatic shut-off device includes: the above-mentioned rubber sleeve; an outer cover, the outer cover is provided with air inlets and outlet holes, the method of the outer cover and the rubber sleeve
  • the flange connection part is connected in a sealed manner by a flange; an air cavity is formed between the inner wall of the outer cover and the outer wall of the rubber sleeve, and the air inlet hole and the air outlet hole are communicated with the air cavity.
  • the outer surface of the rubber sleeve for the pneumatic shutoff device of the present invention is provided with grooves, and the stress at the groove is concentrated, so the surface stress value of the groove position is greater than the surface stress of the rubber sleeve at other positions.
  • the rubber sleeve at the corresponding position of the groove is deformed preferentially inward.
  • the hardness of the rubber sleeve at the raised position is lower than the hardness of the rubber sleeve at other positions.
  • the groove of the rubber sleeve for the pneumatic shutoff device of the present invention is arranged at the middle position of the rubber sleeve along the axial direction to ensure that the rubber sleeves on both sides of the groove are uniformly stressed, deformed and have a better sealing effect. it is good.
  • Figure 1 is a schematic structural diagram of Embodiment 2 of the present invention.
  • Fig. 2 is a partial enlarged view of A in Fig. 1.
  • the present invention provides a rubber sleeve 1 for a pneumatic shutoff device.
  • the rubber sleeve 1 is provided with circulation channels 2 passing through both ends of the rubber sleeve 1 along the outer surface of the rubber sleeve 1.
  • a ring of groove 3 is provided in the circumferential direction, the rubber sleeve 1 corresponding to the groove 3 is provided with a ring of inward protrusions 7, and the wall thickness of the rubber sleeve 1 at the position of the groove 3 is not greater than that of the rubber sleeve 1 at other positions.
  • the hardness of the rubber sleeve 1 at the position of the groove 3 is less than the hardness of the rubber sleeve 1 at other positions.
  • the height H of the protrusion 7 ranges from 10 to 80 mm
  • the ring width L of the protrusion 7 ranges from 30 to 200 mm
  • the rubber sleeve 1 and the groove 3 at other positions
  • the wall thickness of the rubber sleeve 1 at the position of the groove 3 is the same as the wall thickness of the rubber sleeve 1 at other positions to avoid protrusions 7 The location is affected by sharp objects.
  • the rubber sleeve 1 at the position of the protrusion 7 and the rubber sleeve 1 at other positions are integrally formed by vulcanization, and the groove 3 and the protrusion 7 in this embodiment are coaxial with the rubber sleeve 1 Set up.
  • the inward depth of the groove 3 is the same as the wall thickness of the rubber sleeve 1 at other positions, or the depth of the groove 3 is half of the wall thickness of the rubber sleeve 1 at other positions.
  • the length of the groove 3 ranges from 10 cm to 80 cm.
  • the cross-sectional shape of the groove 3 and the cross-sectional shape of the protrusion 7 are both trapezoidal.
  • the two side walls of the groove 3 are inclined to guide the flow to ensure that the gas pressure is concentrated on the position of the groove 3, and the position of the groove 3 is the first to deform ,
  • the protrusion 7 is the first to contact and seal and fit, the sealing effect is good, and the closing speed is fast.
  • the present invention provides a pneumatic shut-off device, which includes the rubber sleeve 1 and the outer cover in the above-mentioned embodiment 1.
  • the two ends of the rubber sleeve 1 are provided with outwardly protruding, on the outer cover
  • An air inlet hole and an air outlet hole are provided, and the flange connection part of the outer cover and the rubber sleeve 1 is sealedly connected by a flange plate.
  • An air cavity is formed between the inner wall of the outer cover and the outer wall of the rubber sleeve 1, and the air inlet hole and the air outlet hole communicate with the air cavity.
  • the present invention provides a pneumatic shut-off device, which includes any one of the above-mentioned embodiments 1 to 3 of the rubber sleeve 1 and the outer cover 4, the two ends of the rubber sleeve 1 are provided with
  • the outer cover 4 is provided with an air inlet 5 and an air outlet 6, and the flange connection part of the outer cover 4 and the rubber sleeve 1 is sealed by a flange; the inner wall of the outer cover 4 and the outer wall of the rubber sleeve 1 An air cavity is formed therebetween, and the air inlet hole 5 and the air outlet hole 6 are in communication with the air cavity.
  • the pneumatic shut-off device is connected to the air source.
  • the groove 3 of the rubber sleeve 1 When the pneumatic shut-off device is inflated, the groove 3 of the rubber sleeve 1 is the first to deform, the protrusion 7 is the first to contact, and the circulation channel 2 is blocked. When the pneumatic shut-off device is deflated , The groove 3 of the rubber sleeve 1 quickly recovers from deformation, and the circulation channel 2 is conducted. In the cut-off state, only a small pressure is needed to achieve zero leakage sealing, with good sealing effect and faster closing and opening.
  • the pneumatic intercepting device of this embodiment is compared with the pneumatic intercepting device in the prior art.
  • the pneumatic intercepting device is suitable for a pipe diameter of 600mm, and the use environment is 1m water head.
  • the comparison is as follows:
  • the pressure value required by the pneumatic shut-off device in this embodiment is smaller and the sealing effect is better.
  • the use of pressure vessels is restricted by the National Standard of the People’s Republic of China: Pressure Vessel (GB 150.1-150.4-2011).
  • the air pressure value required by this embodiment is small to meet the requirements of the standard, has a wide application range, high safety, and a good market prospect.
  • the rubber sleeve in this embodiment the lower the compressed air pressure in the air cavity, the lower the material cost of the equipment cover; the lower the pressure on the rubber sleeve when it is closed, the longer its service life will be. Long; it will be safer when the equipment is installed, debugged and used.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

一种气动截流装置用橡胶套筒（1）及气动截流装置，该橡胶套筒（1）内部设有贯穿橡胶套筒（1）两端的流通通道（2），沿橡胶套筒（1）的外表面周向设有凹槽（3），凹槽（3）对应处的橡胶套筒（1）设有向内的凸起（7），凹槽（3）位置处的橡胶套筒（1）的壁厚不大于其他位置处的橡胶套筒（1）的壁厚。

Description

一种气动截流装置用橡胶套筒及气动截流装置
相关申请的交叉引用
本申请要求于2019年4月19日提交、申请号为201910320178.7且名称为“一种气动截流装置用橡胶套筒及气动截流装置”的中国专利申请的优先权，其全部内容通过引用合并于此。
技术领域
本公开内容涉及排水技术领域，具体涉及一种气动截流装置用橡胶套筒及气动截流装置。
背景技术
市面上的气动截流装置包括外罩和橡胶套筒，外罩与橡胶套筒密封连接形成气腔，外罩上设有进气口，橡胶套筒具有一定的弹性，在气腔内充入压缩气体时，气体压力作用使得橡胶套筒向内缩紧，实现关闭截流通道的动作，当气腔释放有压气体时，橡胶套筒恢复形变，实现打开截流通道的动作。但是现有技术中的橡胶套筒的结构较为简单，为了实现橡胶套筒关闭状态下零泄漏，使用的气压较大。以规格为DN00-DN2000的气动截流装置为例，为了实现橡胶套筒的零泄漏，需要充入4bar以上的气体压力，气体压力过高，在安装使用过程中存在***的危险，使用环境受限制，而且充气时间过长，投入成本高。
发明内容
本公开内容的目的是为了克服上述背景技术的不足，提供一种气动截流装置用橡胶套筒及气动截流装置，能够在较低的气体压力作用下实现零泄漏，密封效果好。
本发明提供一种气动截流装置用橡胶套筒，该橡胶套筒内部设有贯穿橡胶套筒两端的流通通道，沿所述橡胶套筒的外表面周向设有凹槽，所述凹槽对应处的所述橡胶套筒设有向内的凸起。
在上述技术方案的基础上，所述凸起位置的橡胶套筒与其他位置处的橡胶套筒通过硫化方式一体成型。
在上述技术方案的基础上，所述凹槽位置处的橡胶套筒的壁厚不大于其他位置处的橡胶套筒的壁厚；或，所述凹槽位置处的橡胶套筒的壁厚与其他位置处的橡胶套筒的壁厚相同；或，所述凹槽的深度与其他位置处的橡胶套筒的壁厚相同；或，所述凹槽的深度与其他位置处的橡胶套筒的壁厚的一半。
在上述技术方案的基础上，所述凹槽的截面形状为梯形；和/或所述凸起的截面形状为梯形。
在上述技术方案的基础上，所述凸起位置处的所述橡胶套筒的硬度下于其他位置处的所述橡胶套筒的硬度。
在上述技术方案的基础上，所述凸起的高度取值范围为10～80mm。
在上述技术方案的基础上，所述凸起的环宽为30～200mm。
在上述技术方案的基础上，沿所述橡胶套筒的轴线方向，所述凹槽设置于所述橡胶套筒的中部。
在上述技术方案的基础上，所述橡胶套筒的两端部设置向外凸出的法兰连接部。
在上述技术方案的基础上，一种气动截流装置，包括：上述所述的橡胶套筒；外罩，所述外罩上设有进气孔和出气孔，所述外罩和所述橡胶套筒的法兰连接部通过法兰盘密封连接；所述外罩的内壁与所述橡胶套筒的外壁之间形成气腔，所述进气孔和出气孔与所述气腔连通。
与现有技术相比，本发明的优点如下：
(1)本发明的气动截流装置用橡胶套筒的外表面设有凹槽，凹槽处的应力集中，所以凹槽位置表面应力值大于其他位置的橡胶套筒的表面应力，当充气时凹槽对应位置处的橡胶套筒优先向内形变，在凸起位置处的橡胶套筒的硬度低于其他位置处的橡胶套筒的硬度，在关闭时，作为密封环的凸起可以起到增强密封的效果，降低压力的同时又可实现 零泄露密封，密封效果好，节约成本，稳定性高。
(2)本发明的气动截流装置用橡胶套筒的凹槽，沿轴线方向，设置在橡胶套筒的中间位置处，保证凹槽两侧的橡胶套筒受力均匀，形变一致，密封效果更好。
附图说明
图1为本发明实施例2的结构示意图。
图2为图1中A处的局部放大图。
附图标记：1-橡胶套筒1，2-流通通道2，3-凹槽，4-外罩，5-进气孔，6-出气孔，7-凸起。
具体实施方式
下面结合附图及具体实施例对本发明作进一步的详细描述。
实施例1
参见图1和图2所示，本发明提供一种气动截流装置用橡胶套筒1，该橡胶套筒1内部设有贯穿橡胶套筒1两端的流通通道2，沿橡胶套筒1的外表面周向设有一圈凹槽3，凹槽3对应处的橡胶套筒1设有一圈向内的凸起7，凹槽3位置处的橡胶套筒1的壁厚不大于其他位置处的橡胶套筒1的壁厚，且凹槽3位置处的橡胶套筒1的硬度小于其他位置处的橡胶套筒1的硬度。本实施例中凸起7的高度H的取值范围为10～80mm，凸起7的环宽度L的取值范围为30～200mm，其他位置处的橡胶套筒1与凹槽3位置处的橡胶套筒1的硬度＞5邵氏硬度单位。作为优选地，为了保证橡胶套筒1的机械性能和加工的方便型，凹槽3位置处的橡胶套筒1的壁厚与其他位置处的橡胶套筒1的壁厚相同，避免凸起7位置处受尖锐物。
本实施例中的凸起7位置的橡胶套筒1与其他位置处的橡胶套筒1通过硫化方式一体成型，且本实施例中的凹槽3和凸起7与橡胶套筒1同轴线设置。
进一步地，凹槽3向内的深度与其他位置处的橡胶套筒1的壁厚相同，或，凹槽3的深度与其他位置处的橡胶套筒1的壁厚的一半。
进一步地，根据不同规格的气动截流装置，凹槽3的长度范围值为10cm-80cm。
本实施例中的凹槽3的截面形状和凸起7的截面形状均为梯形，凹槽3的两侧壁倾斜导流，保证气体压力集中作用在凹槽3位置，凹槽3位置率先形变，凸起7率先接触密封贴合，密封效果好，关闭速度快。
实施例2
参见图1和图2所示，本发明提供一种气动截流装置，其包括上述实施例1中的橡胶套筒1和外罩，橡胶套筒1的两端设置有向外凸出的，外罩上设有进气孔和出气孔，所述外罩和所述橡胶套筒1的法兰连接部通过法兰盘密封连接。
所述外罩的内壁与所述橡胶套筒1的外壁之间形成气腔，所述进气孔和出气孔与所述气腔连通。
参见图1和图2所示，本发明提供一种气动截流装置，其包括上述实施例1至实施例3中的任一种橡胶套筒1和外罩4，橡胶套筒1的两端设置有向外凸出的，外罩4上设有进气孔5和出气孔6，外罩4和橡胶套筒1的法兰连接部通过法兰盘密封连接；外罩4的内壁与橡胶套筒1的外壁之间形成气腔，进气孔5和出气孔6与气腔连通。本实施例中气动截流装置接入气源，当气动截流装置充气时，橡胶套筒1的凹槽3部位率先发生形变，凸起7率先接触，流通通道2截止，当气动截流装置放气时，橡胶套筒1的凹槽3部位快速恢复变形，流通通道2导通。在截止状态下，只需要较小的压力即可实现零泄漏密封，密封效果好，关闭开启较快。
将本实施例的气动截流装置与现有技术中的气动截流装置进行比较，其中，气动截流装置适用管径600mm，使用环境均为1m水头，比对如下表：
  压力值 密封效果
现有技术 4bar以上 滴水泄露
实施例2 1.8bra 零泄露
可见，本实施例中的气动截流装置所需要的压力值更小，密封效果更好，关于压力容器的使用受到《中华人民共和国国家标准:压力容器(GB 150.1-150.4-2011)》的约束，本实施例所需的气压值较小能够满足标准的要求，适用范围较广，安全性较高，市场前景较好。使用本实施例中的橡胶套筒，气腔内的压缩空气压力越小，设备外罩的材料成本就会下降；橡胶套筒在关闭时所受的压力变小后，自身的使用寿命就会变长；在设备安装调试和使用时就会更加的安全。
本领域的技术人员可以对本发明实施例进行各种修改和变型，倘若这些修改和变型在本发明权利要求及其等同技术的范围之内，则这些修改和变型也在本发明的保护范围之内。
说明书中未详细描述的内容为本领域技术人员公知的现有技术。

Claims (10)

  1. 一种气动截流装置用橡胶套筒，其特征在于：该橡胶套筒内部设有贯穿橡胶套筒两端的流通通道，沿所述橡胶套筒的外表面周向设有凹槽，所述凹槽对应处的所述橡胶套筒设有向内的凸起。
  2. 如权利要求1所述的一种气动截流装置用套筒结构，其特征在于：所述凸起位置的橡胶套筒与其他位置处的橡胶套筒通过硫化方式一体成型。
  3. 如权利要求1所述的一种气动截流装置用套筒结构，其特征在于：所述凹槽位置处的橡胶套筒的壁厚不大于其他位置处的橡胶套筒的壁厚；或，所述凹槽位置处的橡胶套筒的壁厚与其他位置处的橡胶套筒的壁厚相同；或，所述凹槽的深度与其他位置处的橡胶套筒的壁厚相同；或，所述凹槽的深度与其他位置处的橡胶套筒的壁厚的一半。
  4. 如权利要求3所述的一种气动截流装置用橡胶套筒，其特征在于：所述凹槽的截面形状为梯形；和/或所述凸起的截面形状为梯形。
  5. 如权利要求1所述的一种气动截流装置用橡胶套筒，其特征在于：所述凸起位置处的所述橡胶套筒的硬度下于其他位置处的所述橡胶套筒的硬度。
  6. 如权利要求1所述的一种气动截流装置用橡胶套筒，其特征在于：所述凸起的高度取值范围为10～80mm。
  7. 如权利要求1所述的一种气动截流装置用橡胶套筒，其特征在于：所述凸起的环宽为30～200mm。
  8. 如权利要求1所述的一种气动截流装置用橡胶套筒，其特征在于：沿所述橡胶套筒的轴线方向，所述凹槽设置于所述橡胶套筒的中部。
  9. 如权利要求1至8任一项所述的一种气动截流装置用橡胶套筒，其特征在于：所述橡胶套筒的两端部设置向外凸出的法兰连接部。
  10. 一种气动截流装置，其特征在于，包括：如权利要求9所述的橡胶套筒；外罩，所述外罩上设有进气孔和出气孔，所述外罩和所述橡胶套筒的法兰连接部通过法兰盘密封连接；所述外罩的内壁与所述橡胶套筒的外壁之间形成气腔，所述进气孔和出气孔与所述气腔连通。
PCT/CN2020/085034 2019-04-19 2020-04-16 一种气动截流装置用橡胶套筒及气动截流装置 WO2020211800A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910320178.7A CN110067873A (zh) 2019-04-19 2019-04-19 一种气动截流装置用橡胶套筒及气动截流装置
CN201910320178.7 2019-04-19

Publications (1)

Publication Number Publication Date
WO2020211800A1 true WO2020211800A1 (zh) 2020-10-22

Family

ID=67368233

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/085034 WO2020211800A1 (zh) 2019-04-19 2020-04-16 一种气动截流装置用橡胶套筒及气动截流装置

Country Status (2)

Country Link
CN (1) CN110067873A (zh)
WO (1) WO2020211800A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110067873A (zh) * 2019-04-19 2019-07-30 武汉圣禹排水***有限公司 一种气动截流装置用橡胶套筒及气动截流装置
CN110793956B (zh) * 2019-11-13 2021-02-26 无锡物联网创新中心有限公司 痕量气体富集与检测功能相集成的微流控装置及其制备与检测方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60113875A (ja) * 1983-11-18 1985-06-20 Okumura Seisakusho:Kk ピンチバルブ
CH672010A5 (en) * 1988-12-02 1989-10-13 Pondis Ag Valve with tubular rubbery flexible membrane - incorporates tubular housing with screw to hold membrane
CN105276224A (zh) * 2015-10-16 2016-01-27 吴忠仪表有限责任公司 铁路卫生阀用高密封结构的夹管阀
CN110067873A (zh) * 2019-04-19 2019-07-30 武汉圣禹排水***有限公司 一种气动截流装置用橡胶套筒及气动截流装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60113875A (ja) * 1983-11-18 1985-06-20 Okumura Seisakusho:Kk ピンチバルブ
CH672010A5 (en) * 1988-12-02 1989-10-13 Pondis Ag Valve with tubular rubbery flexible membrane - incorporates tubular housing with screw to hold membrane
CN105276224A (zh) * 2015-10-16 2016-01-27 吴忠仪表有限责任公司 铁路卫生阀用高密封结构的夹管阀
CN110067873A (zh) * 2019-04-19 2019-07-30 武汉圣禹排水***有限公司 一种气动截流装置用橡胶套筒及气动截流装置

Also Published As

Publication number Publication date
CN110067873A (zh) 2019-07-30

Similar Documents

Publication Publication Date Title
WO2020211800A1 (zh) 一种气动截流装置用橡胶套筒及气动截流装置
CN205037023U (zh) 管口封堵装置
US7597118B1 (en) Pneumatic pressure relief test plug
WO2020211799A1 (zh) 一种气动截流装置用橡胶套筒及气动截流装置
CN111520566A (zh) 一种用于管道密封性检测的内胀式堵头
CN214367720U (zh) 一种抗变形能力强的密封圈
CN204591645U (zh) 一种打气筒
CN204493746U (zh) 内通道充气密封蝶阀
CN204213361U (zh) 大口径充气密封蝶阀
CN107061784A (zh) 气动灌装阀
CN214699601U (zh) 一种管道的防渗接头组件
CN216201346U (zh) 一种具有高密封性的暖气阀
CN104964046A (zh) 大口径充气密封蝶阀
CN213206944U (zh) 一种用于管道密封性检测的内胀式堵头
CN205534818U (zh) 用于市政工程闭水试验的管道端口橡胶封堵器
CN213333062U (zh) 一种管道快速抢修装置
CN204267821U (zh) 气密性强的气门芯金属芯体
CN204345117U (zh) 一种波纹管连接结构
CN114183622A (zh) 一种压力流体管道防泄漏安全封堵装置
CN210770394U (zh) 一种气动截流装置用橡胶套筒及气动截流装置
CN103291982B (zh) 一种双向自动密封气阀
CN204267807U (zh) 一种气门芯金属芯体
CN221423899U (zh) 一种临氢截止阀
CN104500804A (zh) 气密性强的气门芯金属芯体
CN210118476U (zh) 一种气动截流装置用橡胶套筒及气动截流装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20791682

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20791682

Country of ref document: EP

Kind code of ref document: A1