本专利所述及的是仪表保护装置,特别是关于用以连接压力表和钻杆以指示钻机泥浆压力,而同时防止泥浆进入压力表的保护装置。本专利的主要目的是提供一种如上所述的、新的改进了的保护装置,它能使压力表精确指示泥浆压力。本专利具有冲洗机构以防止泥浆进入压力机构,避免由于渗漏而引起的故障,并使该装置保持长期使用的良好操作条件。 Described in this patent is a meter protection device, and in particular, a protection device for connecting a pressure gauge and a drill pipe to indicate the pressure of a drilling rig mud while preventing the mud from entering the pressure gauge. The main object of this patent is to provide a new and improved protection device as described above which enables the pressure gauge to accurately indicate the pressure of the slurry. This patent has a flush mechanism to prevent mud from entering the pressure mechanism, to avoid failures due to seepage, and to keep the device in good working condition for long-term use.