SU1619178A1 - Arrangement for graduating thermoanemometer - Google Patents

Abstract

The invention relates to measurement technology and metrology and can be used for the calibration and verification of thermoanemometers. The aim of the invention is to reduce the graduation error. Using the actuator 16, one or several two-position cranes are opened, and water from the working tank 2 is flexible pipes

Description

(L

WITH

15 begins to be drunk into the pallet 18. At the same time, the float 3, connected by a rigid connection 13 to the two-positional-cranes, begins to descend together with them from and in the replaceable working tube 5 placed in the heat chamber 1, a vacuum is created. The air flow generated in the working tube 5 acts on the primary transducer 6 of the thermo-anemometer 7. The air flow rate in the working tube 5 is determined using a time interval meter electrically connected through a relay 22, 23 and a sliding contact 24 fixed to a rigid joint. zi 13 with a dimensional base 9 contact line.

When the sliding contact 24 of the boundaries of the measuring base of the relay 22, 23 switches the engine 21 of the pumping unit 20 on and off. Due to the rigid connection 13 of the float 3 and the two-way valves, the level H remains constant when the liquid flows out of the working tank 2. unchanged air flow rate in the process of graduation. The various points of the calibration curve of the hot-wire anemometer are set by switching on a different number of two-station cranes 11 or by changing the diameter of the working tube 5. 1 sludge.

The invention relates to metroloia and measurement technology and can be used to test and radiate 25 thermoanemometers.

The aim of the invention is to reduce calibration errors.

The drawing shows the functional diagram of the proposed device 30.

The device consists of a heat chamber 1, a working tank 2 with a poplarc 3 with a removable upper part 4, which is equipped with a 35 removable working tube 5, an air duct with an assembly for fastening the primary converter 6 of the thermo-anemometer 7, an on-line ruler 8 with a measuring base 9, associated with a time interval meter with a frequency meter recorder 10, a block of 11 two-position cranes with a counterweight 12, connected by rigid couplings 13 to a float 3, and the taps 14 are connected to a working capacity of 2 flexible pipe 15, the common drive 16, removable levers 17, pallet 18, drain valve 19, pump 20, pump engine 21, two relays P1 22 and P2 23, sliding contact 24, frequency indicator lamp 25, pump motor self-reset button 26, plates 27 and 28, mounted on the contact bar 8, bipolar switch 29, guides 30, the closing and opening contacts of the relay P1 22 and P2 23, and the pump warning light 31.

The connection between the elements of the device is as follows: in the water in the working tank 2, the float 3 floats, which through rigid connections 13 communicates with the block 11. two-position valves 14, which are connected by flexible pipes 15 with the working capacity 2. To balance the block 11, a counterweight 12 is applied. In the initial state, when the working capacity 2 is completely filled, the sliding contact 24 is installed on the rigid connection 13 opposite the upper contact plate 27. An electric wire connected to the network 24 is connected to the sliding contact 24 nym switch 29. The second wire is connected to the measuring base 9 and the contact plates 27 and 28, installed on the contact bar 8. When draining and typing water in the working capacity 2, the sliding contact 24, lowering together with the float 3, includes the recorder 10 of the frequency meter, signal lamp 25, turns on and off the motor 21 of the pump 20 through the disconnecting and closing contacts of relays P1 22 and P2 23. Button 26 serves to turn on the motor 21 of pump 20 when the float 3 is in the lower or middle position. For smooth operation of the float 3, guides 30, installed in the working tank 2, are used.

To create the desired air flow in the replaceable working tube 5, two-way valves 14 can be separately connected to the common drive 16 through 51

removable levers 17. When the taps 14 are opened by moving the drive 16, the water of the working tank 2 drains the tray 18. When the working tank 2 is empty, the pump 20 is turned off, which is indicated by the warning light 31, and the liquid is pumped from the tray 18 to the working tank 2. Air into The working tube 5 comes from the heat chamber 1 installed under the working tank 2. The drain valve 19 serves to remove the liquid from the sump.

The device works as follows.

By closing the two-pole switch 29 and turning on the button 26 for self-return

volume, engine 21 starts working

Claims (2)

By moving the actuator 16, the taps 14 are opened and the water flows out of them into the sump 18. The float 3 is lowered together with the block 11 of the valves and the rigid connections. The floating contact 24, lowering, touches the measuring base 9, turns on the recorder 10 of the counting device and the warning light 25. Water, lowering, sucks the air from the heat chamber 1 through the working tube b, the flow rate is measured by the primary converter 6 of the thermoanemometer 7. After lowering the potsta 3, in the lower position, the floating contact 24 touches the contact plate 28, the motor 21 of the pump 20 is turned on. A new cycle begins to prepare the device for operation. 0 claims pump 20, which pumps the liquid from the pallet 18 into the working capacity 2. At the same time, the float 3 rises along the rails 30. The floating contact 24 mounted on the rigid connection 13 rises together with the float 25 and closes alternately the plates 28, 9, 27 mounted on the contact bar 8. In contact with the contact bar plate 28 applies a voltage to relay P1 22, which by means of a motor, installed between a new self-blocking, opens with a don and a working capacity, the meter A graduation device for a thermomemometer, containing a working tank with a float, connected in the upper part with an air duct, located in a heat chamber, a fixing unit for the primary converter, thermomemometer, located in a duct pallet, a pump unit with the communication line of the measuring base 9 with the recorder 10 of the frequency meter, disconnects the P2 23 relay from the electrical network and turns on the electric motor 21 of the pump 20, which is indicated by the light bulb 31. The self-return button 26 acts similarly. When it reaches the plate 27, the floating contact 24 closes the circuit of the relay P2 23, opens the circuit of the relay P1 22, closes the circuit of the recorder 10, turns off the engine 21 of the pump 20. The required number of two-piece cranes 14 is connected to the drive with 16 removable levers T 7, 45 cranes with counterweight and drive are installed, 35 40 time intervals and flow rate regulator in the duct, characterized in that, in order to reduce the graduation error, a contact bar with the correct base and a sliding contact and two time relays are introduced, while the boundaries of the measuring base on the contact bar are electrically connected through each relay with the motor of the pump unit and the time interval meter, and the flow rate regulator in the duct is designed as two-way The working tube 5 of the required diameter, the primary converter 6 of the thermo-anemometer 7 is attached to it, the necessary air temperature is established in the heat chamber 1. The device is ready for operation. Compiled by Y. Vlasov Editor I. Gorn Tehred M. Didyk than the on-off cranes are connected together with the counterweight and separately driven by means of levers, and also connected by a rigid connection with the pop bench and flexible pipes to the bottom of the working capacity. Proofreader O. Kravtsov 0 By moving the actuator 16, the taps 14 are opened and the water flows out of them into the sump 18. The float 3 is lowered together with the block 11 of the valves and the rigid connections. The floating contact 24, lowering, touches the measuring base 9, turns on the recorder 10 of the counting device and the warning light 25. Water, lowering, sucks the air from the heat chamber 1 through the working tube b, the flow rate is measured by the primary converter 6 of the thermoanemometer 7. After lowering the potsta 3, in the lower position, the floating contact 24 touches the contact plate 28, the motor 21 of the pump 20 is turned on. A new cycle begins to prepare the device for operation. 0 claims five 5 0 engine, installed between the pallet and working capacity, meter engine mounted between the pallet and the working capacity, meter A graduation device for a thermomemometer, containing a working tank with a float, connected in the upper part with an air duct, located in a heat chamber, a fixing unit for the primary converter, thermomemometer, located in a duct pallet, a pump unit with cranes with a counterweight and drive, time intervals and flow rate regulator in the duct, characterized in that, in order to reduce the graduation error, a contact bar with the correct base and a sliding contact and two time relays are introduced, while the boundaries of the measuring base on the contact bar are electrically connected through each relay with the motor of the pump unit and the time interval meter, and the flow rate regulator in the duct is designed as two-way than the on-off cranes are connected together with the counterweight and separately driven by means of levers, and also connected by a rigid connection with a boom and flexible pipes to the bottom of the working tank. Proofreader O. Kravtsov