RU2466194C1 - Unit for monitoring cooling ability of hardening medium - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: unit for monitoring the cooling ability of hardening medium includes base, tubular furnace, hardening medium capacity and heat flow probe with built-in thermocouple. In order to shift the probe from the furnace to the hardening medium capacity, a mechanism consisting of triple and double parallel link mechanisms is provided. The first plate of triple parallel link mechanism is rigidly fixed in upper part of vertical post. Heat flow probe is attached to the second plate of the above mechanism. Probe is always in vertical position and moves along the trajectory in the form of arc of circle from furnace heating zone to the centre of hardening medium volume. One of the axes of fixed plate of triple parallel link mechanism is connected through movement synchroniser to one of levers of fixed plate of double parallel link mechanism. Furnace performing the function of transfer mechanism drive is attached to its movable plate.

EFFECT: reduction of mass and dimensions parameters of the unit.

1 dwg

Description

 The invention relates to the field of heat treatment of steel and alloys in order to increase their mechanical properties and can be used to build an inventory of liquids by their cooling ability.

A device for determining the parameters of the cooling ability of quenching liquids containing a heater and a heat flux sensor with a thermocouple connected to a measuring device. The heat flow sensor, made with a cavity for the fluid flow, is fixedly mounted in the heater, while the thermocouple is located inside the sensor. (USSR AS No. 1057557, MKI ³ C21D 1/56, 11/30/1983).

The specified device has several disadvantages:

1) when changing quenching liquids, all containers and pipelines must be cleaned by pumping through them, for example, a solvent;

2) after a series of experiments, carbon deposits must be removed from the inner surface of the heat flux sensor;

3) the conditions of similarity in heat and mass transfer in natural and experimental processes are not observed;

4) the bulkiness and complexity of the device.

A device is known for determining the parameters of the cooling ability of quenching liquids, in which the heat flux sensor is stationary, the movable heater and the tank with the quenching medium moving at the same time, and allow the heat flux sensor equipped with a thermocouple connected to the measuring device to pass through them. (French Patent No. 2080270, CL G01N 25/00, 02/27/1970).

In this device, to ensure reliable contact between the thermocouple junction and the heat flux sensor, additional devices are needed that distort the temperature field of the sensor and cause a systematic error. In addition, the need for movement of the heater and capacity leads to cumbersomeness and re-complication of the device.

A device is known for determining the cooling ability of a quenching medium, comprising: a base, a rod fixed on the base, a container with a quenching medium, over which a heater is mounted, a heat flow sensor in which a thermocouple junction is fixed, thermoelectrodes connected through a tubular leg with measuring and recording devices temperature, pneumatic movement system of the heat flow sensor. (V. Lyuty. Hardening media. Reference book. Metallurgy. Chelyabinsk. 1990, 190 pp. 48-50).

The disadvantages of the device are the bulkiness of the design and the complexity of the scheme. The circuit can only work if there is a central pneumatic system or compressor with associated devices and devices.

The closest in technical essence and the achieved result is an installation for controlling the parameters of the quenching medium, comprising: a base, a tube-type furnace, a tank with a quenching medium, a quenching medium heater, a heat flux sensor with a thermocouple integrated in it, a mechanism for transferring a heat flux sensor from the heater to a tank with a quenching medium made in the form of a triple hinged parallelogram with a counterweight as a drive, and a thermocouple signal processing automation system (RF patent No. 2388835, C21D 11/00, 04/10/2006).

The disadvantage of this installation is the cumbersome design of the tube furnace, due to the curvature of the trajectory of the sensor.

The objective of the invention is the reduction of overall dimensions due to the use of a tubular furnace as a counterweight to drive the transfer mechanism, made in the form of a triple articulated parallelogram.

The task is achieved by the installation for monitoring the cooling ability of the quenching medium, including the base, a tube-type furnace, a tank with a quenching medium, a heat flow sensor with an integrated thermocouple, a mechanism for transferring a heat flow sensor from the furnace to a tank with a quenching medium, an automatic control and control system, which introduced a quenching medium heater located on the base, which has a vertical rack with a trigger mechanism, and the transfer mechanism is made in the form of a triple articulated a parallelogram, the first plate of which is fixedly mounted in the upper part of the vertical rack, and the heat flux sensor is attached to the second plate so that it is always in vertical position with the possibility of movement along the path in the form of an arc of a circle, the extreme points of which are located in the center of the furnace heating zone of the tubular type and the center of the volume of the quenching medium, while, in contrast to the prototype, one of the axes of the fixed plate of the triple hinged parallelogram mechanism is connected through a synchronizer of two izheniya with one of the levers of the fixed plate of the mechanism of a double hinged parallelogram, and a tubular furnace is fixed to the movable plate, which is the drive of the transfer mechanism.

The invention is illustrated in the figure. The figure shows the design of the installation for monitoring the cooling ability of the quenching medium.

The installation comprises a base with a vertical strut 1, on which a triple hinged parallelogram mechanism 2 is fixed, a trigger 3, a double hinged parallelogram mechanism 4, an emphasis 5, a brake mechanism 6, a middle position button 7, an extreme position support 8, a tube furnace 9, a container with quenching medium 10, quenching medium heater 11, heat flux sensor 12 with an integrated thermocouple, mounting the heat flux sensor 13, control panel 14, return handle 15, motion synchronizer 16.

Installation for monitoring the parameters of the quenching medium works as follows. Before the experiment, through the user interface of an electronic computer (PC), its parameters are set: the required temperature of the heat flow sensor, the exposure time, the required temperature of the quenching medium. The heat flux sensor 12 is placed in a tubular furnace 9, a container with a quenching medium 10 is installed on the heater of the quenching medium 11. In the automatic mode, all experimental parameters are maintained, which is simultaneously displayed on the monitor in graphical and numerical form. Then, a signal is sent from the computer to turn on the trigger mechanism 3, which releases the lever of the double articulated parallelogram 4. The furnace 9 drives the mechanism of the double articulated parallelogram and, through the motion synchronizer, the mechanism of the triple articulated parallelogram, and the heat flux sensor 12 is plane-parallel transferred to the tank with quenching medium 10, in this case, after the sensor passes point A, the furnace remains in the lower position, and bringing the mechanism of the triple hinged parallelogram 2 to the support 8 produces It is due to inertia and gravity of the heat flux sensor. The heat flux sensor in the quenching medium is cooled and the thermocouple readings are recorded in the computer memory for subsequent processing and calculations. Next, using the return handle 15 located on the rack 1, the triple hinged parallelogram mechanism 2 leads the heat flux sensor 12 to point A for cleaning and inspection, then it is diverted to the tube furnace 9 to start the next experiment.

The use of the furnace as a drive of the transfer mechanism, made in the form of a triple hinged parallelogram, allows to reduce the overall dimensions and simplify the design of the installation to control the cooling ability of the quenching medium.

Claims (1)

Installation for monitoring the cooling ability of the quenching medium containing a base, a tube-type furnace, a tank for the quenching medium, a heat flux sensor with an integrated thermocouple, a mechanism for transferring the heat flux sensor from the said furnace to a tank with a quenching medium with a drive, an automatic control and control system, a heater quenching medium located on the base, which has a vertical rack with a trigger mechanism, and the sensor transfer mechanism is made in the form of a triple articulated parallelogram, per the second plate of which is fixedly mounted in the upper part of the vertical rack, and the heat flux sensor is attached to the second plate with the possibility of always being in the vertical position and moving along the path in the form of an arc of a circle, the extreme points of which are located in the center of the heating zone of the tubular furnace and the center of the quenching volume medium, characterized in that it is equipped with a double articulated parallelogram mechanism, one of the axes of the fixed plate of the triple articulated parallelogram mechanism is connected via syn a motion chronometer with one of the levers of the fixed plate of the double-hinged parallelogram mechanism, and a tube furnace mounted to the movable plate of the double-hinged parallelogram is used as the drive of the sensor transfer mechanism.

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