CN201493466U

CN201493466U - Automatic heating temperature-controlling system for casting mould with centrifugal hot mould method

Info

Publication number: CN201493466U
Application number: CN200920308824XU
Authority: CN
Inventors: 何明胜; 浦杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-08-26
Filing date: 2009-08-26
Publication date: 2010-06-02
Anticipated expiration: 2019-08-26

Abstract

The utility model discloses an automatic heating temperature-controlling system for casting a mould with a centrifugal hot mould method, wherein a plurality of sets of burning devices are arranged the bottom of a mould cylinder, each set of the burning devices is provided with a plurality of nozzles, each set of the burning devices is connected with a mixed gas pipeline though valves, each set of the valves is connected with PLC control systems by valve control circuits, the upper part of the mould cylinder is provided with heat-sensitive sensors corresponding to the numbers of the sets of the burning devices, and each heat-sensitive sensor is connected with the PLC control systems by induction circuits. The PCL automatic control flame type burning nozzle solves the problem that the mould is unstably heated due to a centrifugal hot mould casting method, realizes the control stability of temperature gradient, and well guarantees the inner quality of a centrifugal cast pipe during the producing process.

Description

Centrifugal heat modulus method casting mould heats temperature-controlling system automatically

Technical field

The utility model relates to a kind of heater of centrifugal heat modulus method casting mould, relates in particular to a kind of automatic heating temperature-controlling system of centrifugal heat modulus method casting mould.

Background technology

Centrifugal casting is the cast and the casting method of moulding under centrifugal force field, in the foundry goods of being produced less, do not have and be mingled with and pore, dense structure, the product yield height is the main method of pipe fitting production.In recent years along with the high development of petrochemical industry, the also continuous intensive rise of spun cast pipe producer, and the quality of production of heat-resisting alloy boiler tube also becomes each enterprise development tackling key problem object and technical research problem, and product quality can not get effective assurance, and enterprise then can't survive in competition.At present domestic heat-resisting high-alloy centrifugal cast tube producer the heating and the control of type tube temperature is played pendulum always, and for the boiler tube product quality, the accurate control of type tube thermograde is one of key factor that influences product before the cast.

Conventional type tube mode of heating has: electric oven heated type and the heating of flame formula appearance, and manually use the far infrared temperature measurer to detect the type tube temperature.

At the electric furnace heating, type tube is static whole heating in baker, and Jia Re process makes the type tube distortion easily like this; And type tube heating back bulk temperature is the same, does not reach the thermograde of predetermined technological requirement, can only be with wind or water local cooling, wasted the energy like this and efficient is low, and temperature is inaccurate, has reduced the service life of type tube; And this mode needs handling mould repeatedly, has damaged the service behaviour of centrifuge tugboat on certain degree.

Heat at flame-type; during putting into practice, this kind mode uses ripe producer seldom; because the unreasonable structure of designs such as the nozzle heating system is connected with pipeline or difficult control, phenomenons such as " tempering ", " blowing out " appear in gaseous mixture allotment ratio instability during heating through regular meeting.

And present spun cast pipe manufacturer all will heat and temperature control is got in touch closely and is one, all belong to self-contained process, and the detected temperatures that can only lean on the workman not stop with survey tool is carried out the adjusting of each by-pass valve control of gaseous mixture again, and security is also lower like this.

The utility model content

The utility model purpose is to provide a kind of novel centrifugal thermodyn process casting mould to heat temperature-controlling system automatically, adopt PLC to control flame formula burning nozzle automatically, solved centrifugal casting thermodyn process mold heated instability, realized the stability of thermograde control simultaneously, made the inherent quality that has well guaranteed spun cast pipe in the production process.

The technical solution of the utility model is achieved in that

A kind of centrifugal heat modulus method casting mould heats temperature-controlling system automatically, comprise some groups of thermal sensing devices, the PLC control system, some groups of burners, the gaseous mixture pipeline, nozzle and igniter, described burner is arranged on the type tube bottom, described every group of burner is provided with several equally distributed nozzles, described igniter is by forming with the corresponding igniter head of sets of burners number, described igniter head is arranged on described every group of burner center, every group of burner links to each other with the gaseous mixture pipeline by valve, it is characterized in that: described every group of valve links to each other with the PLC control system by the valve control circuit, be provided with and the corresponding thermal sensing device of described sets of burners number on the top of described type tube, described each thermal sensing device is connected with described PLC control system by induction line.

Described every group of thermal sensing device control burner corresponding with it.

The utility model compared with prior art has following advantage:

1. the flame formula burner of type tube below is connected rationally with the integral body of gaseous mixture pipeline, gauge tap, the PLC switch board of type tube oblique upper thermal sensing device and room parameter input has been formed temperature-controlling system, by the valve control circuit these two parts are combined, constituted the automatic heating temperature-controlling system of type tube; Formed a kind of stable and the combination of heating, temperature control has reliably realized its automation.

2. solve the unsettled difficult point of centrifugal casting thermodyn process mold heated by this heating system, realized the stability of thermograde control simultaneously, can guarantee the inherent quality of spun cast pipe in the production process well.

3. every group of thermal sensing device controlled burner corresponding with it, guaranteed the uniformity of type tube temperature, and temperature control is more accurate.

Description of drawings

Fig. 1 heats the structural representation of temperature-controlling system automatically for centrifugal heat modulus method casting mould described in the utility model

1. thermal sensing device 2. induction line 3.PLC control systems 4. type tubes 5. nozzles 6. igniter head 7. burners 8. igniters 9. valves 10. gaseous mixture pipelines 11. valve control circuits

The specific embodiment

As can be seen from Figure 1, a kind of centrifugal heat modulus method casting mould heats temperature-controlling system automatically, comprise some groups of thermal sensing devices 1, PLC control system 3, some groups of burners 7, gaseous mixture pipeline 9, nozzle 5 and igniter 8, described burner 7 is arranged on the bottom of type tube 4, described every group of burner 7 is provided with several equally distributed nozzles 5, described igniter 8 is by forming with the corresponding igniter head 6 of 7 groups of numbers of burner, described igniter head 6 is arranged on described every group of burner 7 centers, every group of burner 7 links to each other with gaseous mixture pipeline 10 by valve 9, it is characterized in that: described every group of valve 9 links to each other with PLC control system 3 by valve control circuit 11, be provided with and the corresponding thermal sensing device 1 of 7 groups of numbers of described burner on the top of described type tube 4, described each thermal sensing device 1 is connected with described PLC control system 3 by induction line 2, described every group of thermal sensing device 1 control burner 7 corresponding with it.

In process of production, after type tube is in place, light nozzle by igniter; With spraying temperature technological parameter and pouring temperature parameter input PLC control system, control button is rotated to " spraying " position, start the type tube rotary knob; Whole heating system is started working, and feeds back the temperature of whole type tube by the thermal sensing device, and the switch of control system control gaseous mixture valve is regulated, and reaches the requirement of spraying temperature technological parameter, and system stops whole heating; The type tube spraying possesses casting condition.

The knob of control heating rotates to " cast " position, and the temperature requirement according to input heats type tube once more.When a part temperature reached requirement, the corresponding site gas control valve was closed automatically.This moment, also available far infrared temperature measurer carried out temperature correction, when unitary mould reaches the temperature process requirement, poured into a mould.

Claims

1. a centrifugal heat modulus method casting mould heats temperature-controlling system automatically, comprise some groups of thermal sensing devices (1), PLC control system (3), some groups of burners (7), gaseous mixture pipeline (9), nozzle (5) and igniter (8), described burner (7) is arranged on the bottom of type tube (4), described every group of burner (7) is provided with several equally distributed nozzles (5), described igniter (8) is by forming with burner (7) group corresponding igniter head of number (6), described igniter head (6) is arranged on described every group of burner (7) center, every group of burner (7) links to each other with gaseous mixture pipeline (10) by valve (9), it is characterized in that: described every group of valve (9) links to each other with PLC control system (3) by valve control circuit (11), be provided with and described burner (7) the group corresponding thermal sensing device of number (1) on the top of described type tube (4), described each thermal sensing device (1) is connected with described PLC control system (3) by induction line (2).

2. a kind of centrifugal heat modulus method casting mould according to claim 1 heats temperature-controlling system automatically, it is characterized in that: described every group of thermal sensing device (1) control burner corresponding with it (7).