Adjustment method of indicating value out of tolerance found during inspection of stainless steel seismic table

Stainless steel shock-resistant pressure gauge shell and internal original parts are made of stainless steel, and silicone oil is filled in the meter body, so that the pointer of the pressure gauge plays a role in shock absorption and earthquake resistance.

The stainless steel shock-resistant pressure gauge has both the shock-resistant performance and the corrosion-resistant performance of the stainless steel pressure gauge. The stainless steel shock-resistant pressure gauge is suitable for occasions where the vibration of industrial and mining sites is large and the measured medium is corrosive.

Adjustment method of indication out-of-tolerance found during inspection of stainless steel shock-resistant pressure gauge;

A) The calibration point error of pressure gauge always increases (or decreases) by a fixed value. Just re-insert the pin and adjust the installation position of the pointer to divide it by xiao.

B) The error of pressure indication value increases (or decreases) in direct proportion. This error is mainly caused by the incorrect magnification ratio of the movement, which can be solved only by adjusting the indicating screw to the correct magnification ratio.

C) The pressure indication values are different in order of speed, which results in nonlinear error. This error is caused by the incorrect clamping angle between the movement sector and the pull rod. The adjustment method is to change the included angle between the connecting rod and the sector tooth. When the indication is fast before and slow after, rotate the movement counterclockwise or move the free end outward to expand the included angle between the pull rod and the sector tooth; If the indication is slow before and then fast, it will be adjusted in the opposite direction. When the installation position of the movement is incorrect, the dial is skewed, and the pointer shaft is not in the center of the arc of the spring tube or the center of the dial hole, this different phenomenon of fast and slow will also occur. We should loosen the fixing screw of the movement and adjust the position of the movement or dial appropriately to solve it. ?

D) Only one point indicates that the error is out of tolerance. Check the fit clearance between parts, whether the transmission shaft hole is blocked, whether the pull rod is flexible, whether the movement gear is damaged or not, and if so, remove it.

What are the precautions for using pressure gauges? How to install it?

Pressure gauges need to be very delicate in the production process. It is the pressure displayed by the rotation of the pointer due to the elastic change of the sensitive elements in the table. However, there are many types of pressure gauges, such as general pressure gauges, corrosion-resistant pressure gauges and even explosion-proof pressure gauges, which can be selected according to the working environment. Therefore, it is necessary to use corresponding pressure gauges in specific environments and places, such as explosion-proof pressure gauges. Using them in dangerous places with explosive mixtures in the environment can make people avoid danger.

If you observe carefully in your life, you will find that there are many places where pressure gauges are used. For example, pressure gauges are used in some steam furnaces or some thermal pipelines, so there are many places where pressure gauges are used in almost any industrial process and scientific research field. In fact, there are many types of pressure gauges. It is not only a general pointer type, but also a digital type and a conventional type. Therefore, if you use it in any place, you need to choose it according to your own needs, so that you can choose it and suit yourself.

Installation settings of pressure gauge:

When installing the pressure gauge, it is necessary to make a comprehensive analysis of the installation environment, so as to install the pressure gauge reasonably according to the actual installation environment and ensure that the pressure gauge is in a stable and safe environment. Operate according to the installation specifications of pressure gauges, and pay attention to the following aspects during installation:

1. The pressure gauge needs to be installed in an easy-to-observe position.

When choosing the installation position of the pressure gauge, it is necessary to choose a position that is easy to observe for installation, so that the pressure gauge can be fully observed and treated with dirt. In order to improve the accuracy of the pressure gauge, it is necessary to install the pressure gauge in a place where the sun is not direct and the temperature is high, so as to avoid radiation heat, freezing and vibration of the pressure gauge due to external factors.

2. The pressure gauge body needs to be in the vertical direction.

When installing the pressure gauge body, it is necessary to control the pressure gauge body in the vertical direction so that the staff can read the displayed value of the pressure gauge. If the pressure gauge needs to be installed in a higher position, it can be adjusted vertically by tilting forward, but the tilting angle cannot exceed 30 degrees.

3. Install the buffer tube in front of the pressure gauge.

After installing the pressure gauge, it is necessary to install a buffer tube in front of the pressure gauge to avoid the pressure gauge being affected by external gas. As the safeguard facility of the pressure gauge, the buffer tube can relieve the gas in the spring tube, and the buffer tube has the function of collecting condensed water, which can prevent the pressure gauge from having too much gas.

4. Install the three-way cock or valve.

At the bending part of the buffer tube of the pressure gauge, it is necessary to install the three-way cock or valve in a suitable middle position, so that the three-way cock or valve can fully guarantee the pressure gauge.

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