SU81820A1 - The recording device on the car-scales - Google Patents

Description

Recording instruments are known for wagon-scales, for example, for the weight of a blast-furnace charge, using a pneumatic and a transfer device from the scales to a recorder. It is also known to use the pressure of air supplied from a separate source and measured with a nominal recording device. However, these devices and devices do not register on the tape the results of individual weighings, for example, each component of the charge.

The distinctive feature of the proposed device is that the tape is moved from a clamp mechanism with an electromagnet, activated automatically by limit switches that interact with the cams with the handpieces of the pneumatic device's grids to turn on a set of individual components of the switchgear. This device eliminates the disadvantages of three local devices and devices.

FIG. Figures 1 and 2 show the principle schematic diagram of a membrane device with a compressed and decompressed spring; in fig. A 3-principle scheme of the action of a recording device on a car-scale for weighing the household charge.

The main and device nodes are a membrane relay and a self-recording device.

The principle of the equilibrium between the compressive force of the spiral ciliidric spring /, arising from the movement of the beam 2 weights and the balancing force of the pressure {air) is based on the action of the membrane relay. In the quality of the sensing element, arrest the pressure spring / diaphragm 3.

In the absence of the contraction of the pruns 1, the membrane 3 is in the D equilibrium state. In the presence of a compression / membrane J, moving toward the spool device, opens Claian 4 (Fig. 3) and compressed air from the spool core; 5 but into the cavity of the membrane box 6). Air pressure rises before the onset

№81820-2-

equilibrium membrane 3. When equilibrium is reached, valve 4 closes, air intake into membrane box 6 is stopped, and pressure in it stabilizes.

Conversely, by reducing the spring pressure / membrane 3, moving towards the spring /, is disrupted, valve 7 opens and air under the action of the resulting overpressure exits the membrane box 6 to the atmosphere. The air pressure drops to the onset of membrane equilibrium.

With the onset of equilibrium, the valve 7 closes, air leaks from the membrane, the 5branium box into the atmosphere stops and the pressure stabilizes again, etc.

Thus, the system automatically balances when the spring / B force changes as a result of the weighing.

The tape 8 results of individual weighings, for example, each component, are produced by moving the tape using the ratchet mechanism 9 with the electromagnet 10, which is automatically activated from the limit switches // interacting, in turn, with the cams, the handles of the pneumatic valve boxes. 1STBa 12 for inclusive I1 set of individual components of the system. The tape chart recording is made by a membrane type recorder 13, depending on the pressure of the pressure in the membrane box 6.

PRIORITY

A recording device on a car-scale, for example, for the weight of a blast-furnace charge, using a pneumatic transfer device; from the weights to the self-recording instrument i, using the pressure (the weighted body of the clan, the regulator, the pressure of the air supplied from the separate source and measured by register), the device, the device, and the liter and 11 s by the fact that, for the purpose of recording on the tape) the results of individual ignitions, for example, each component: 1 shunt, the movement of the mite is generated from the ratchet with an electromagnet activated automatically from the limit switches interacting with the cam switch; the handle of the spool boxes of the pneumatic device to activate a set of separate charge mixes.

Fig 1

9b (7g 2