Valve http:// reason stem lifting failure: 85 Inch Conference Interactive Whiteboard As a 85 inch conference all-in-one machine, 85 inch Conference Interactive Whiteboard, microphones and conference software. The small size contains great momentum, providing high-quality pictures and sound effects for team video conferences. 85 Inch Conference Interactive Smart Board,85 Inch Conference All-In-One Machine,85 Inch Electronic Interactive Digital Board,85 Inch Interactive Digital Board Guangdong Zecheng Intelligent Technology Co., Ltd , https://www.zechengsecuritys.com
1 over-tightens the thread;
2 lack of lubrication or lubricant failure;
3 valve stem bending and twisting;
4 The surface finish is not enough;
5 Incorrect tolerance of fit, too tight bite;
6 stem nut tilt;
7 improper material selection, such as stem and stem nut is the same material, easy to bite;
8 thread is corroded by medium (refer to the valve of the stem valve or stem nut in the lower valve);
9 Open-valve valves lack protection, stem threads are covered with dust, or they are rusted by rain, frost, and snow.
Prevention method:
1 meticulous operation, do not make vigorous when closed, do not go to the top dead point when you open, open enough after the hand wheel reversed a circle or two, so that the upper side of the thread close together, avoid medium to push the valve stem upward impact;
2 Regularly check the lubrication condition and maintain the normal lubrication condition;
3 Do not open and close the valve with a long lever. Workers who are accustomed to using short levers must strictly control the force measurement to prevent the twisting valve stem (the valve directly connected to the hand wheel and the valve stem);
4 Improve the quality of processing or repair to meet the specification requirements;
5 Materials should be corrosion resistant, adapt to working temperature and other working conditions;
6 The stem nut should not be the same material as the stem;
7 When using plastic as the stem nut, check the strength, you can not only consider the good corrosion resistance and friction coefficient, but also consider the strength problem, do not use the strength is not enough;
8 open valve to add stem protection sleeve;
9 Normally open valve. Turn the handwheel on a regular basis to prevent the stem from rusting.
In terms of camera hardware configuration, the 85 inch electronic Interactive Digital Board uses a 12 million pixel camera and supports a wide viewing angle of 120 degree. It can be used in small and medium-sized office spaces and can incorporate more team members into the video conference scene. 4K high-definition resolution can provide high-quality video images, adding points to the corporate image.
In terms of sound experience, 85 inch interactive digital board has built-in 6 array microphones to bring high-fidelity sound quality, and 85 inch conference interactive smart board can achieve up to 8 meters of remote sound pickup, and can perform accurate sound in every corner of the meeting room. At the same time, in the remote meeting mode, the tablet will locate the sound source so that the speaker will not be able to display the picture, automatically gain the voice, eliminate echo and noise, even if the speaker is far away, the audience can still hear it.
The cause and prevention of valve stem failure