RU2388835C1 - Installation for control over cooling capacity of quench - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: installation consists of base with vertical pole, of tube furnace, of tank with quench, of quench heater, of system for automatic control, of mechanism for transfer of heat flow sensor from furnace to quench tank made in form of triple hinged parallelogram. The first disk of the parallelogram is rigidly fixed in an upper part of the vertical pole. The sensor of heat flow is attached to the second disk. The sensor travels in a vertical state along trajectory in form of circumference arc, extreme points of which are located in the centre of quench volume. Also one of the axles of the first disk of triple hinged parallelogram mechanism is connected to a lever of counterbalance used as a drive mechanism for sensor transfer.

EFFECT: simplification of control installation design.

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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 is known for determining the parameters of the cooling ability of quenching liquids, comprising a heater and a heat flux sensor with a thermocouple connected to a measuring device. The heat flow sensor, made with the cavity for the fluid flow motionless, is mounted in the heater, while the thermocouple is located inside the sensor. (A.S. USSR No. 1057557, MKI 3 S21D 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 are moved simultaneously and the heat flux sensor equipped with a thermocouple connected to the measuring device passes 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 to the base, a container with a quenching medium, over which a heater is installed, a heat flow sensor in which a thermocouple junction is fixed, thermoelectrodes of which are connected to temperature measuring and recording devices through a tubular leg , system of pneumatic movement of the heat flow sensor. (V. Lyuty. Hardening media. Reference book. Metallurgy. Chelyabinsk. 1990. 190 p. S.48-50).

The disadvantage of this device is 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, containing 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, and a mechanism for transferring a heat flux sensor from the heater to the tank with a quenching medium, made in the form of a triple hinged parallelogram with an electric motor as a drive, and a thermocouple signal processing automation system (RF patent No. 2279 490, С21Д 11/00, 04/10/2006).

The disadvantage of the installation is its complexity and cumbersome design, due to the use of an electric motor as a drive of the transfer mechanism.

The objective of the invention is the reduction of overall dimensions, the simplification of the design through the use of a counterweight as a drive of 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 the hardening 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 disk of which is fixedly mounted in the upper part of the vertical rack, and the heat flux sensor is attached to the second disk 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 tubular type and the center of the volume of the quenching medium, while, in contrast to the prototype, one of the axes of the first disk of the triple hinged parallelogram mechanism is connected to the counterweight lever, which is I drive transfer mechanism.

The invention is illustrated in the drawing. The installation comprises a base with a vertical strut 1, on which the triple hinged parallelogram mechanism 2 is fixed, the trigger mechanism 3, the counterweight 5, the lever 4, the brake mechanism 6, the button for the middle position 7, the support of the extreme positions 8, the tube furnace 9, the tank with quenching medium 10 , quenching medium heater 11, heat flux sensor with built-in thermocouple 12, fastening of heat flux sensor 13, control panel 14, return handle 15.

Installation for monitoring the parameters of the quenching medium works as follows. Before the experiment, through the user interface of the electronic computer (PC), its parameters are set: the required temperature of the heat flux sensor, the exposure time, the required temperature of the quenching medium, the Heat flux sensor 12 is placed in a tube furnace 9, the tank with the quenching medium 10 is set to quenching medium heater 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 starting mechanism 3, which releases the counterweight lever 4. The counterweight 5 drives the lever 4 pivotally mounted on the axis of the triple hinged parallelogram mechanism 2, and the heat flux sensor 12 is plane-parallel transferred to the vessel with quenching medium 10 in this case, after the mechanism passes point A, the counterweight remains in the lower position, and the triple hinged parallelogram 2 is brought to the support 8 due to the gravity of the heat flux sensor forces of inertia. The heat flow sensor is cooled in the quenching medium and the thermocouple readings are recorded in the computer memory for subsequent processing and calculations. Further, by means of 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.

So, the use of a counterweight as a drive of the transfer mechanism, made in the form of a triple hinged parallelogram, allows to reduce weight and size 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 with a vertical stand, a tube-type furnace, a tank with a quenching medium, a quenching medium heater, a heat flow sensor with an integrated thermocouple, an automatic control and control system, a mechanism for transferring a heat flow sensor from the furnace to the tank with quenching medium, which is made in the form of a triple hinged parallelogram, the first disk of which is fixedly mounted in the upper part of the vertical rack, and is attached to the second disk the heat flow sensor so that it is always in a vertical position, with the possibility of movement along the trajectory 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 volume of the quenching medium, characterized in that one of the axes of the first disk the triple hinged parallelogram mechanism is connected to the counterweight lever, which is a drive of the sensor transfer mechanism.

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