CS232191B1 - Connection of a stationary pressure drop meter in a pipe in a wind network down - Google Patents

Abstract

The connection of the stationary meter according to the invention serves to measure pressure drops in the mine's wind network and is intended primarily for coal mines with a risk of methane and coal dust explosion. The connection of the stationary pressure drop meter consists of a pressure measuring box, which is connected to the pipeline by a branch, a deflection sensor, which is connected to the pressure measuring box by a correction unit. A transmitter is connected to the output of the deflection sensor, which is connected to the β separation unit by a transmission line and a power line. The separation unit is connected to a dispatcher line with a receiver, to which an evaluation device can be connected.

Description

in Jolie relates to the connection of a stationary pressure gauge in a mine wind network, which is intended primarily for operation in a mining environment with a risk of methane and coal dust explosion.

Measurement of pressure drop in the mine wind network is one of the essential operations in the ventilation control to ensure the safety of the mine permanently β compilation of balance sheet · Under current conditions, pressure drop measurement in the mine wind network is performed at least once · Under current conditions for measuring the pressure drop in the wind network below, only portable micromanameters or microbarometers can be used. Measurement of pressure drops in the lower wind network and their evaluation is demanding. time and workforce · This time demands do not give the possibility of quick and operative interventions into the wind grid ·

The above mentioned drawbacks are eliminated by the connection of the stationary pressure meter in the wind network according to the invention, which consists in the fact that on the pipeline distributed in the mine, with the open end on the surface, outside the scope of the main fan, a pressure gauge box The deflection sensor, wherein the pressure gauge box with the deflection sensor is connected by a correction unit, while at the: deflection sensor output, a transmitter is connected, connected to the separation unit by transmission line and power line, while the separation unit is connected by dispatcher line to receiver. control, registration and automation elements ·

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The pressure gauge box is connected by a branch to the duct »distributed in the bottom» with an open end on the surface, outside the main fan. · The pressure gauge box is connected by a deflection sensor * whose output is controlled by a transmitter providing a signal to the transmission line corresponding to the pressure drop The biasing sensor is coupled with a correction unit to ensure zero, waveform, etc. · The transmission line is connected to a isolating member that provides galvanic separation of the terminal equipment in the intrinsically safe part of the system, for which it also limits the amount of power that can the line penetrates the decoupling element and at the same time provides power to the sparks · safe circuits from the surface power supply, which is part of the receiver · The decoupling element is connected to the surface receiver via the dispatching line The output can be connected to the necessary evaluation device (computer, indicator, register · device, input antomatization part, etc.) ·

By connecting the meter to a tight metal or plastic pipeline distributed downstream, the pressure drop generated at the site by the main fan and the pressure of the natural wind pulling down or by the assisting fan working in the wind network downwards is measured by a direct method. It is not possible to calculate by means of other ventilation parameters · Monitoring of pressure drops at selected sites at nodal points of the wind network of the mine according to the invention is possible not only by computer or control panel, but also by connection to recorder. so that it works even in emergency conditions · Intrinsically safe design of mine elements allows monitoring of vital parameters even in emergency conditions · Existing dispatcher cables are used to realize long-distance lines ·

The attached drawing shows a block diagram in a well-arranged arrangement ·

A pressure gauge box 1, mechanically coupled to a deflection sensor 4, is connected to the pipe 3 by a branch 2, the pressure gauge box 1 and the deflection sensor 4 being connected by a correction unit.

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While the transmitter 6 is connected to the output of the deflection sensor 4, connected and separated by a transmission line 8 and a power line 9, while the separation unit 7 is connected by a control line 10 to a receiver 11, the output 12 of which can be connected. registration and antematization elements ·

Claims (1)

Connection of a stationary pressure drop meter / in a wind network downstream, characterized in that a pressure gauge box (1) is mechanically connected to the duct (3) distributed in the mine and open horse to the superficially out of the main fan. coupled to the deflection sensor (4), wherein the pressure gauge box (1) and the deflection sensor (4) are connected by a correction unit (5), while a transducer (6) is connected at the output of the deflection sensor (4) connected to the separation unit (7). ) transmission line (8) and power line (9), whereas the separation unit (7) is connected by a dispatching line (1Θ) with a receiver (11), whose output (12) is used to connect downstream controllers, registration and automation elements