The utility model particularly relates to a bidirectional measuring air valve, which solves the problem of poor sealing effect and single function of the common gas measuring nozzle. Bidirectional test valve, including the tube wall, the wall is provided with a sealing tube, the sealing tube is provided with a linkage rod, the linkage rod length is greater than the length of the sealing tube, the linkage rod is arranged outside the outer cover, the inner end is provided with a linkage rod inner cover, outer cover is connected with the outer end of the hand screw fixed nut hand tighten the screws on the outside of the tube wall and the inner wall is provided with internal thread end fixing nut with the inner end wall and outer wall is provided with external threads. The utility model not only can switch by hand, but also can automatically detect and switch according to the positive and negative pressure in the drilling hole. The utility model has the advantages of simple structure, reliable operation, convenient use of a hole and convenient use.
【技术实现步骤摘要】
双向测气阀
本技术涉及井下瓦斯抽查系统监测仪器,具体为一种双向测气阀。
技术介绍
井下瓦斯抽查系统中单孔的测气嘴肩负着重大意义,它用来测试单孔的浓度、负压,同时在关闭后可以防止水及正压从测气嘴中涌出,造成巷道内瓦斯超限。但结合目前实际情况来看,普通测气嘴小把手在长时间的开关过程中会经常损坏,同时在钻孔长时间停抽后孔内积聚瓦斯、水等,打开测气嘴后会有正压瓦斯和水喷出,对所在巷道的瓦斯浓度增加,容易造成监测设备报警。
技术实现思路
本技术为了解决普通测气嘴密封效果不好功能单一的问题,提供了一种双向测气阀。本技术是采用如下技术方案实现的:双向测气阀,包括管壁,管壁内设有密封管,密封管内设有联动杆,联动杆长度大于密封管长度,联动杆外端设有外堵盖,联动杆内端设有内堵盖,外堵盖外端连接有手拧螺丝,手拧螺丝上固定有固定螺母,管壁外端内壁设有与固定螺母配合的内螺纹,管壁内端外壁设有与外螺纹。使用时,双向测气阀需要测量瓦斯浓度和负压,只需要拧动手拧螺丝,带动固定螺母啮合入内螺纹,此时联动杆与密封管之间的通道保持连通状态,双向测气阀外端可以加套皮管进行测量工作;当测量工作结束后,拧动手拧 ...
【技术保护点】
一种双向测气阀,其特征在于:包括管壁(1),管壁(1)内设有密封管,密封管内设有联动杆(2),联动杆(2)长度大于密封管长度,联动杆(2)外端设有外堵盖(3),联动杆(2)内端设有内堵盖(4),外堵盖(3)外端连接有手拧螺丝(6),手拧螺丝(6)上固定有固定螺母(5),管壁(1)外端内壁设有与固定螺母(5)配合的内螺纹(7),管壁(1)内端外壁设有与外螺纹(8)。
【技术特征摘要】
1.一种双向测气阀,其特征在于:包括管壁(1),管壁(1)内设有密封管,密封管内设有联动杆(2),联动杆(2)长度大于密封管长度,联动杆(2)外端设有外堵盖(3),联动杆(2)内端设有...
【专利技术属性】
技术研发人员:崔建峰,刘路生,刘柏松,孟强华,张越,康沛,李晓伟,曹雪芹,成国清,徐慧芳,
申请(专利权)人:山西晋城无烟煤矿业集团有限责任公司,
类型:新型
国别省市:山西,14
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