CN212554660U

CN212554660U - Hot-pressing kettle

Info

Publication number: CN212554660U
Application number: CN201921857109.1U
Authority: CN
Inventors: 郭超; 野延年; 寇朝辉; 赵品; 白瑞强
Original assignee: Xi'an Aerospace Chemical Propulsion Co ltd
Current assignee: Xi'an Aerospace Chemical Propulsion Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2021-02-19
Anticipated expiration: 2029-10-31

Abstract

An impeller is positioned in a hot-pressing kettle body tank and sleeved on an output shaft of a variable frequency motor; a balance pipe is connected between the variable frequency motor and the autoclave tank body. The outlet end of the air guide cone is positioned in the impeller cavity; the inlet end of the air guide cone is positioned in the heating chamber. And a product vehicle guide rail is arranged in the heating chamber of the autoclave body. The air duct is arranged in the autoclave body, and an air flow channel is arranged between the outer circumferential surface of the air duct and the inner surface of the autoclave body. The invention utilizes the aerodynamic heating principle, utilizes the motor to drive the impeller to rotate and simultaneously rub air to generate heat, has no local high temperature point inside, ensures that the difference of the internal temperature of the aerodynamic hot-pressing kettle is less than 0.5 ℃, has no heat energy waste, has high heating efficiency, saves more than 30 percent of energy compared with the common external electric heating blast hot-pressing kettle, meets the policy requirements of energy conservation and emission reduction in China, and is beneficial to improving the basic industrial level in China.

Description

Hot-pressing kettle

Technical Field

The invention relates to the field of rubber vulcanization in chemical industry, in particular to a hot-pressing kettle which is used for high-temperature vulcanization production of rubber materials and takes aerodynamic force as a heat source.

Background

The autoclave is a heating device commonly used in the chemical field, and generally adopts the heating of a heating pipe and the mode of air supply of a fan to heat a workpiece. Temperature regulation usually adopts modes such as control circular telegram heating pipe quantity and fan amount of wind to carry out, and the temperature measurement platinum resistance conveys the temperature to the controller in the cauldron, sends the control by temperature change instruction by the controller again, and this kind of mode is because the heating pipe temperature is very high, and the heat is carried to the cauldron from the heating pipe and is carried out the convection heat transfer and the cooling, and it needs a period of time to convey to temperature sensor again, so can cause control command lag, and temperature fluctuation increases, and temperature field homogeneity in the cauldron also receives the influence. Secondly, the electric heating pipe forms a local high temperature point in the autoclave body, and the explosion risk can be increased in industrial occasions with higher requirements on safety performance, such as heating combustible and combustible materials. In addition, from the perspective of energy conservation, local high temperature can also cause energy waste, which is not beneficial to energy conservation and emission reduction.

The utility model discloses a patent CN207975866U "an aerodynamic heating furnace" and invention patent CN108344194A "the aerodynamic heating furnace that holds the chamber and is less than 1 m" propose a small-size aerodynamic heating furnace, can't be used to the heating of the large-scale work piece of industry, patent CN200910021648.6 "aerodynamic heating furnace and the method of producing heat energy" propose the device that utilizes the aerodynamic heating principle to heat, only can be used to the heating of ordinary pressure industrial furnace, utility model patent CN103629838A "aerodynamic heating furnace" proposes a large-scale aerodynamic heating furnace, can be used to the heating of the large-scale work piece of industry, nevertheless because no bearing structure design and safety mechanism, can't be used to the area and press the heating usage. Because the pressure of a heating environment is often required to be controlled in industrial heating and the requirement on safety performance is high, the traditional autoclave can only be used for heating related to pressurized heating at present.

A novel wind energy heating system (invention patent number: CN201810073227.7, practical patent number: CN201820126602.5) provides a device for heating by utilizing wind energy, a wind and light complementary heating system (patent number: CN201910180360.7) provides a device for heating by utilizing wind energy and light energy simultaneously, the two devices both utilize the principle of aerodynamic heating to improve the air inlet temperature of an air heating system, and the device can only utilize natural wind energy or light energy for heating, is limited by natural conditions and cannot be used for industrial high-efficiency production.

Disclosure of Invention

In order to overcome the defects that the prior art can only use natural wind energy or light energy for heating, is limited by natural conditions and cannot be used for industrial high-efficiency production, the invention provides the autoclave.

The invention comprises a hot-pressing kettle body, a variable frequency motor, an air guide cone, an air guide cylinder, an in-tank track and an impeller. Wherein: the variable frequency motor is arranged on the outer surface of the bottom of the autoclave body, and the output shaft of the variable frequency motor is positioned in the impeller cavity in the autoclave body; the impeller is positioned in the impeller cavity and sleeved on an output shaft of the variable frequency motor; a balance pipe is connected between the variable frequency motor and the autoclave body, one end of the balance pipe is connected into an impeller cavity in the autoclave body, and the other end of the balance pipe penetrates through a cooling water jacket of the variable frequency motor and is connected into a shell of the variable frequency motor. The outer surface of the furnace door of the autoclave body is provided with a sealing ring air charging and discharging interface. The outlet end of the air guide cone is positioned in the impeller cavity, and the distance between the end surface of the outlet end and the blade tip of each blade in the impeller is 10 mm; the inlet end of the air guide cone is positioned in the heating chamber. Two parallel in-tank guide rails are arranged in the heating chamber of the autoclave body. The air duct is arranged in the autoclave body, and an air flow channel is formed by the distance between the outer circumferential surface of the air duct and the inner surface of the autoclave body. The distance between the outer circumferential surface of the air duct and the inner surface of the autoclave body is 100 mm.

One end of the autoclave body, which is provided with an output shaft of a variable frequency motor, is provided with a stainless steel protective net. The space between the protective net and the bottom of the autoclave body is an impeller cavity, the impeller is positioned in the impeller cavity and sleeved on the output shaft of the variable frequency motor, and foreign matters in the autoclave body are prevented from being sucked into the impeller cavity through the protective net. A heating chamber is arranged between the protective net and the furnace door of the autoclave body.

The center of the protective net is provided with a through hole, and the aperture of the through hole is the same as the outer diameter of the wind guide cone at one half of the axial length.

And the two ends of the guide rail in the tank are respectively provided with a limiting block, the distance between the limiting block at one end and the protective net is 300mm, and the distance between the limiting block at the other end and the innermost end face of the furnace door is 300 mm.

The hot-pressing kettle body is of a sandwich structure and consists of an outer shell, an inner shell and a heat insulation material positioned between the outer shell and the inner shell; the heat insulation layer is made of aluminum silicate fibers with the heat conductivity coefficient smaller than 0.05W/m.k, and the thickness of the heat insulation layer is 50 mm.

The taper of the air guide cone is 30-45 degrees, and the ratio of the inlet sectional area to the outlet sectional area of the cone section is 6: 1-10: 1.

Two temperature measuring sensor interfaces are distributed on the shell of the autoclave body, and the center distance between the temperature measuring sensor interfaces is larger than 500 mm.

The invention utilizes the aerodynamic heating principle, adopts the variable frequency motor to adjust the rotating speed of the impeller, and simultaneously utilizes the temperature measuring platinum resistor to feed back the temperature in the autoclave to the control system, thereby forming a temperature closed loop control loop and realizing the accurate control of the temperature in the autoclave. The temperature difference value in the air power autoclave is less than 0.5 ℃ through measurement of platinum resistors for temperature measurement located at different positions, the temperature difference of different positions of the traditional autoclave is generally 5-10 ℃, the effect is obviously superior to that of the traditional autoclave, and the method has important significance for improving the product quality of a heating workpiece. The aerodynamic force autoclave adopts the aerodynamic force heating principle, utilizes the motor to drive the impeller to rotate and simultaneously rubs air to produce heat, has no local high temperature point inside, no heat energy waste, high heating efficiency, saves more than 30% of energy compared with the ordinary external electric heating blast air autoclave, accords with the policy requirement of our country energy saving and emission reduction, and is favorable for improving our country basic industrial level.

Drawings

Fig. 1 is a schematic diagram of the overall structure of an aerodynamic autoclave.

Fig. 2 is a front view of the furnace door.

Figure 3 is a side view of the oven door.

Fig. 4 is a schematic view of an impeller.

In the figure: 1. a furnace door; 2. a autoclave body; 3. a sealing ring air charging and discharging interface; 4. a heat preservation structure; 5. a pressure sensor interface; 6. a temperature sensor interface; 7. a pressure gauge interface; 8. an air duct; 9. an air intake valve interface; 10. an exhaust valve interface; 11. a sewage draining outlet; 12. a safety valve interface; 13. carrying out product vehicle; 14. an in-tank track; 15. a wind guide cone; 16. an impeller; 17. a winding pad; 18. a protective net; 19. and a balance tube.

Detailed Description

This embodiment is an autoclave using aerodynamic force as a heat source. Comprises a furnace door 1, a hot-pressing kettle body 2, a variable frequency motor, an air guide cone 15, an air guide duct 8, an in-tank track 14, a product vehicle 13 and an impeller 16. Wherein: the autoclave body 2 is a sealed tank body, and a furnace door 1 is arranged on a furnace door at one end of the autoclave body. The variable frequency motor is arranged on the outer surface of the bottom of the other end of the autoclave body, and an output shaft of the variable frequency motor is positioned in the autoclave body; the interface between the variable frequency motor and the autoclave body is sealed by a metal winding pad 17; a balance pipe 19 is connected between the variable frequency motor and the autoclave body, one end of the balance pipe is connected into an impeller cavity in the autoclave body, and the other end of the balance pipe penetrates through a cooling water jacket of the variable frequency motor and is connected into a shell of the variable frequency motor. The outer surface of the autoclave body furnace door is provided with a sealing ring air charging and discharging interface 3. Three exhaust valve interfaces 10, two safety valve interfaces 12 and two intake valve interfaces 9 are distributed on the circumferential surface of the autoclave body 2. Two temperature sensor interfaces 6 are also distributed on the shell of the autoclave body, and the center distance between the two temperature sensor interfaces is more than 500 mm. The drain outlet 11 is arranged on one side of the circumferential surface of the autoclave body. The tank body of the autoclave body 2 is also provided with two pressure sensor interfaces 5 and a pressure gauge interface.

One end of the output shaft of the variable frequency motor in the autoclave body 2 is provided with a stainless steel protective net 18, and the outer diameter of the protective net is the same as the inner diameter of the autoclave body. The space between the protective net and the bottom of the autoclave body is an impeller cavity, the impeller is positioned in the impeller cavity and sleeved on the output shaft of the variable frequency motor, and foreign matters in the autoclave body are prevented from being sucked into the impeller cavity through the protective net. A heating chamber is arranged between the protective net and the furnace door of the autoclave body. A through hole is formed in the center of the protective net 18, the aperture of the through hole is the same as the outer diameter of one half of the axial length of the air guide cone 15, the outlet end of the air guide cone is positioned in the impeller cavity, and the distance between the end face of the outlet end and the blade tip of each blade in the impeller is 10 mm; the inlet end of the air guide cone is positioned in the heating chamber and is fixed on the inner wall of the hot-pressing kettle body through four support rods. The air flow generated by the impeller is led into the air duct through the air guide cone and returns to the interior of the autoclave body at the tank opening to form circular flow. The high-speed air flow generates heat to form a heat source by mutual friction in the autoclave, and the temperature in the autoclave is uniform, stable, safe and efficient.

Two parallel in-tank guide rails 14 are arranged in the heating chamber of the autoclave body 2, and a product vehicle 13 is arranged on the guide rails. And the two ends of the guide rail in the tank are respectively provided with a limiting block, the distance between the limiting block at one end and the protective net is 300mm, and the distance between the limiting block at the other end and the innermost end face of the furnace door is 300 mm.

The air duct 8 is installed in the autoclave body through a bracket, and an airflow channel of 100mm is arranged between the outer circumferential surface of the air duct and the inner surface of the autoclave body, and the ratio of the sectional area of the airflow channel to the sectional area of the autoclave body is 1: 5-1: 15. when the ratio of the sectional area of the airflow channel to the sectional area of the kettle body is less than 1: at 15, the pressure and vibration in the airflow channel are increased, resulting in increased noise; when the ratio of the sectional area of the airflow channel to the sectional area of the kettle body is more than 1: and 5, the pressure in the airflow channel is reduced, the energy input efficiency is reduced, and the heating efficiency of the autoclave is influenced. In this embodiment, the ratio of the sectional area of the airflow channel to the sectional area of the kettle body is 1: 9, the rotation speed of the impeller is 0-3000 r/min, and the temperature in the furnace can be from normal temperature to any temperature of 250 ℃.

The furnace door 1 adopts the prior art, and is a tooth-locked quick-opening furnace door.

The autoclave body 2 is of a sandwich structure and consists of an outer shell, an inner shell and a heat insulating material positioned between the outer shell and the inner shell, so that heat inside the autoclave body is prevented from being dissipated. The outer part of the autoclave body is provided with a lifting lug and a support, so that the autoclave body is convenient to lift, install and fix. The heat insulation layer is made of aluminum silicate fibers with the heat conductivity coefficient less than 0.05W/(m.k), and the thickness is 50 mm.

The impeller is a ventilator impeller in the prior art. In the embodiment, the blades are in a forward mode; the inlet and outlet of the blade have the same width, and the blade has the characteristics of high pressure coefficient, large flow coefficient, low noise and low ventilation efficiency. The central angle phi of the blade is 100-164 degrees, and the installation angle beta of the blade outlet_b2Is 5 degrees to 30 degrees, and the installation angle beta of the blade inlet_b15-35 degrees. The inner diameter-to-outer diameter ratio D of the impeller₁:D₂0.72-0.83, the axial height b of the impeller and the outer diameter D of the impeller₂The ratio is 0.18 to 0.36.

The taper of the air guide cone 15 is closely related to the heat production and flow guide effect of the air guide cone, the taper of the air guide cone is 30-45 degrees, and the ratio of the inlet sectional area to the outlet sectional area of the cone section is 6: 1-10: 1. The taper of the air guide cone adopted in the embodiment is 45 degrees, the ratio of the sectional area of an inlet of the cone section to the sectional area of an outlet of the cone section is 8:1, and the diameter of the outlet of the cone section is 500 mm.

Claims

1. A hot-pressing kettle is characterized by comprising a hot-pressing kettle body, a variable frequency motor, an air guide cone, an air guide cylinder, an in-tank track and an impeller; wherein: the variable frequency motor is arranged on the outer surface of the bottom of the autoclave body, and the output shaft of the variable frequency motor is positioned in the impeller cavity in the autoclave body; the impeller is positioned in the impeller cavity and sleeved on an output shaft of the variable frequency motor; a balance pipe is connected between the variable frequency motor and the autoclave body, one end of the balance pipe is connected into an impeller cavity in the autoclave body, and the other end of the balance pipe passes through a cooling water jacket of the variable frequency motor and is connected into a shell of the variable frequency motor; a sealing ring air charging and discharging interface is arranged on the outer surface of the furnace door of the autoclave body; the outlet end of the air guide cone is positioned in the impeller cavity, and the distance between the end surface of the outlet end and the blade tip of each blade in the impeller is 10 mm; the inlet end of the air guide cone is positioned in the heating chamber; two parallel in-tank guide rails are arranged in a heating chamber of the autoclave body; the air duct is arranged in the autoclave body, and an air flow channel is formed by the distance between the outer circumferential surface of the air duct and the inner surface of the autoclave body.

2. The autoclave of claim 1, wherein a stainless steel protective net is arranged at one end of an output shaft of a variable frequency motor in the autoclave body; the space between the protective net and the bottom of the autoclave body is an impeller cavity, and foreign matters in the autoclave body are prevented from being sucked into the impeller cavity through the protective net; a heating chamber is arranged between the protective net and the furnace door of the autoclave body.

3. The autoclave of claim 2, wherein the protective net has a through hole in the center, and the diameter of the through hole is the same as the outer diameter of the wind guide cone at half of the axial length.

4. The autoclave of claim 1, wherein two ends of the guide rail in the autoclave are respectively provided with a limiting block, the distance between the limiting block at one end and the protective net is 300mm, and the distance between the limiting block at the other end and the end surface of the innermost end of the oven door is 300 mm.

5. The autoclave of claim 1, wherein the autoclave body is a sandwich structure comprising an outer shell, an inner shell, and a thermal insulation material between the outer shell and the inner shell; the heat insulation layer is made of aluminum silicate fibers with the heat conductivity coefficient smaller than 0.05W/m.k, and the thickness of the heat insulation layer is 50 mm.

6. The autoclave of claim 1, wherein the taper of the air guide cone is 30-45 degrees, and the ratio of the inlet sectional area to the outlet sectional area of the cone section is 6: 1-10: 1.

7. The autoclave of claim 1, wherein two temperature sensor interfaces are distributed on the shell of the autoclave body, and the center distance between the temperature sensor interfaces is more than 500 mm.

8. The autoclave of claim 1, wherein the distance between the outer circumferential surface of the air guide duct and the inner surface of the autoclave body is 100 mm.