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CN2392006Y - 内压式膨胀活塞 - Google Patents

内压式膨胀活塞 Download PDF

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Publication number
CN2392006Y
CN2392006Y CN 99215419 CN99215419U CN2392006Y CN 2392006 Y CN2392006 Y CN 2392006Y CN 99215419 CN99215419 CN 99215419 CN 99215419 U CN99215419 U CN 99215419U CN 2392006 Y CN2392006 Y CN 2392006Y
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internal pressure
pressure type
type expansion
sealed colloid
main body
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CN 99215419
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魏建宏
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Abstract

一种应用于柱塞泵的内压式膨胀活塞,主要由活塞主体1和密封胶体2组成,密封胶体2由压盖3压装在活塞主体1上,密封胶体2与活塞主体1之间有环空4,该环空有通道5与柱塞泵的缸套内腔相通。本实用新型可以通过缸套内的压力,使密封胶体向外膨胀,自动补偿磨损量,同时更换密封胶体时,不必更换活塞主体1。

Description

内压式膨胀活塞
本实用新型涉及一种应用于柱塞泵的活塞。
在现有技术中,柱塞泵的活塞与缸套之间的密封通过嵌装在活塞主体外圆周上的锥形胶皮来实现的,这种密封结构存在如下缺陷:1.由于柱塞泵的工作环境和工作介质一般都比较恶劣,密封胶皮的磨损很快,而其磨损量又得不到补偿,因此,不得不频繁更换活塞;2.由于密封胶皮是一次性固定死在活塞主体上的,更换密封胶皮必须与活塞主体一起更换。由于上述缺陷的存在,造成柱塞泵检修时间较多,影响正常工作,同时也加大了柱塞泵的运行费用。
本实用新型的目的是提供一种能自动补偿密封胶体磨损量,同时又可以单独更换密封胶体的内压式膨胀活塞。
本实用新型主要由活塞主体1和密封胶体2组成,其特征是密封胶体2由压盖3固定在活塞主体1上,密封胶体2与活塞主体1之间有环空4,环空4经通道5与柱塞泵的缸套内腔相通。
如上所述的内压式膨胀活塞,其特征是在密封胶体2内装有弹簧6和锁销7,在压盖3上加工有锯齿形倒刺,与锁销7一起形成单向锁死机构。
本实用新型的优点是:1.当密封胶体或缸套内径磨损时,由于缸套内压力的作用,可以使密封胶体向外膨胀,自动补偿磨损量,从而大幅度延长密封胶体的工作寿命;2.当磨损量太大、自动补偿不能满足要求时,只需将压盖御下,更换密封胶体即可,而不必将活塞主体与密封胶体一起报废。
图1为本实用新型实施例1结构图。
图2为本实用新型实施例2结构图。
现结合附图和实施例,对本实用新型进一步说明如下:
实施例1:如图1所示,本实用新型主要由活塞主体1和密封胶体2组成,密封胶体2由压盖3压装在活塞主体1上,密封胶体2与活塞主体1之间有环空4,环空4经通道5与柱塞泵的缸套内腔相通。当活塞在缸套内向前运动时,缸套内的工作介质受压,并将压力经通道5和环空4传递给密封胶体2,密封胶体2受压后向外膨胀,保证其与缸套内壁的接触,从而保证密封效果。
实施例2.如图2所示,在实施例1的基础上,在密封胶体2内安装有弹簧6和锁销7,在压盖3上加工有锯齿形倒刺,与锁销7一起构成单向锁死机构,以保证密封胶体2只能向外膨胀,不能向内收缩。

Claims (2)

1.内压式膨胀活塞,主要由活塞主体(1)和密封胶体(2)组成,其特征是密封胶体(2)由压盖(3)固定在活塞主体(1)上,密封胶体(2)与活塞主体(1)之间有环空(4),环空(4)经通道(5)与柱塞泵的缸套内腔相通。
2.根据权利要求1所述的内压式膨胀活塞,其特征是在密封胶体(2)内装有弹簧(6)和锁销(7),在压盖(3)上加工有锯齿形倒刺,与锁销(7)一起形成单向锁死机构。
CN 99215419 1999-06-23 1999-06-23 内压式膨胀活塞 Expired - Fee Related CN2392006Y (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 99215419 CN2392006Y (zh) 1999-06-23 1999-06-23 内压式膨胀活塞

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 99215419 CN2392006Y (zh) 1999-06-23 1999-06-23 内压式膨胀活塞

Publications (1)

Publication Number Publication Date
CN2392006Y true CN2392006Y (zh) 2000-08-16

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Family Applications (1)

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CN 99215419 Expired - Fee Related CN2392006Y (zh) 1999-06-23 1999-06-23 内压式膨胀活塞

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101865127A (zh) * 2010-06-22 2010-10-20 三一重工股份有限公司 一种泵送设备及其输送缸活塞
CN103321892A (zh) * 2013-05-29 2013-09-25 三一汽车制造有限公司 一种弹性活塞、泵送系统及工程机械
CN104863548A (zh) * 2015-05-26 2015-08-26 王玉 一种自动间歇煤层气排水产气装置
CN107401575A (zh) * 2017-08-28 2017-11-28 贵州龙飞气弹簧有限责任公司 一种气弹簧活塞
CN107905980A (zh) * 2017-11-14 2018-04-13 江西风石压缩机有限公司 一种空压机活塞

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101865127A (zh) * 2010-06-22 2010-10-20 三一重工股份有限公司 一种泵送设备及其输送缸活塞
CN101865127B (zh) * 2010-06-22 2012-09-05 三一重工股份有限公司 一种泵送设备及其输送缸活塞
CN103321892A (zh) * 2013-05-29 2013-09-25 三一汽车制造有限公司 一种弹性活塞、泵送系统及工程机械
CN104863548A (zh) * 2015-05-26 2015-08-26 王玉 一种自动间歇煤层气排水产气装置
CN107401575A (zh) * 2017-08-28 2017-11-28 贵州龙飞气弹簧有限责任公司 一种气弹簧活塞
CN107905980A (zh) * 2017-11-14 2018-04-13 江西风石压缩机有限公司 一种空压机活塞

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C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee
C32 Full or partial invalidation of patent right
IP01 Partial invalidation of patent right

Decision date of declaring invalidation: 20040420

Decision number of declaring invalidation: 6011

Case number: W55394

Conclusion of examination: Without the conclusion of the 6. examination, the claim No. 1 of this patent right shall be invalid, and the patent right shall be maintained on the basis of claim 99215419.7 of the 2.

Decision date: 20040413

Denomination of utility model: Internal pressure type expansion piston

Granted publication date: 20000816

Patentee: Wei Jianhong

Review decision number: 6011

C57 Notification of unclear or unknown address
DD01 Delivery of document by public notice

Addressee: Wei Jianhong

Document name: Notice of acceptance of the petition for invalidation

C57 Notification of unclear or unknown address
DD01 Delivery of document by public notice

Addressee: Eight good Shaanxi province Xi'an City No. 10 building 14, No. 53 Zhang Jun Wei Jianhong

Document name: Decision of the request for invalidation