CN107642902B - A high-efficiency heating furnace - Google Patents

Abstract

The invention discloses a high-efficiency heating furnace, which comprises a water tank, a water inlet and a water outlet are arranged on the water tank, an exhaust port is arranged on the top of the water tank, a furnace body is arranged in the water tank, and several furnace bodies are connected to the inside of the furnace body. The metal spiral smoke exhaust pipe is equipped with an external smoke exhaust hole on the water tank. The high-heat gas in the furnace is sent to the external smoke exhaust hole through the metal spiral smoke exhaust pipe, and is discharged from the water tank through the external smoke exhaust hole. There is a connecting furnace in the water tank. The air intake channel and the feed channel inside the body and outside the water tank. Set the furnace body in the water tank. When the water tank is filled with water, the heat energy on the furnace wall can be directly transferred to the water, so that the water temperature rises rapidly. The hot gas formed by combustion in the furnace body passes through the metal spiral smoke exhaust pipe connected to the furnace body. , Carry out long-distance spiral transport in water, so that the heat of high-temperature gas is fully absorbed by water, thus greatly improving the utilization rate of combustion heat energy in the heating furnace.

Description

A high-efficiency heating furnace

technical field

The invention relates to a high-efficiency heating furnace.

Background technique

The weather is cold in winter, so heaters are used in many places. According to their heat sources, heaters are divided into electric heating such as heaters, heat exchange heating such as air conditioners, and fuel heating such as stoves. There are also some indirect heating methods such as coal and gas. The water is heated, and then the hot water is transported to the cooling device through the pipeline, and the heat energy of the hot water is dissipated into the air through the cooling device, so as to increase the ambient temperature and achieve the heating effect.

From the point of view of the energy used above, there are only two ways, one is electric heating, and the other is fuel heating. Products using electric heating usually have the disadvantages of high energy consumption and large consumption. A 2 kilowatt The heater can only generate 7.2MJ of heat in an hour, and the heating effect is not obvious, but it is equivalent to more than 1 yuan for two degrees of electricity in an hour, so it is not practical in the poorer places in the north, and many people are still reluctant to use such expensive heating. Fuel heating mainly refers to coal-fired heating. Due to the low price of coal and long burning time, one kilogram of heating coal can generate heat of 25.115MJ, and the cost is less than 0.5 yuan. Therefore, the use of coal-fired heating is more in line with the needs of residents. need.

However, whether it is coal-fired or gas-fired heating equipment, it is relatively backward at present. Take coal-fired heating equipment as an example. The traditional heating equipment is a coal-fired stove. When burning by coal, the heat is released into the house through the furnace wall and part of the chimney, but most of the heat is discharged outside through the chimney, which is a great waste of heat energy.

Contents of the invention

The technical problem to be solved by the present invention is to provide a high-efficiency heating furnace, which can greatly improve the utilization efficiency of coal-burning heat energy.

In order to solve the above technical problems, the technical solution adopted in the present invention is: a high-efficiency heating furnace, including a water tank, the water tank is provided with a water inlet and a water outlet, the top of the water tank is provided with an exhaust port, and a furnace body is provided in the water tank. The furnace body is connected with a number of metal spiral smoke exhaust pipes connected to the interior of the furnace body, and the water tank is provided with an external smoke exhaust hole. The hole discharges the water tank, and the water tank is provided with an air inlet passage and a feed passage connecting the inside of the furnace body and the outside of the water tank.

As a preferred solution, the furnace body is T-shaped, and the metal spiral exhaust pipes are all connected to the top surface of the furnace body.

As a preferred solution, the outer smoke exhaust hole is located on the top of the water tank, the upper end of the metal spiral smoke exhaust pipe extends upwards to the smoke exhaust hole, and a liquid level control device is installed in the water tank to control the liquid level lower than the metal spiral exhaust pipe. the upper end of the pipe.

As a preferred solution, the water tank is provided with a gas gathering pan sealed and connected to the outer smoke exhaust hole, the gas gathering pan is a hollow airtight shell, the upper end is open and the open end is sealed butted with the outer smoke exhaust hole, so The upper ends of the metal spiral smoke exhaust pipes are sealed and connected to the lower end surface and/or the side wall of the gas gathering pan respectively and communicate with the inside of the gas gathering pan.

As a preferred solution, the outer smoke exhaust hole is connected with an outwardly extending chimney, and a waste gas secondary combustion separation device is arranged on the chimney.

As a preferred solution, the furnace body is fixedly connected to the center of the bottom plate of the water tank, the air intake channel is set on the bottom plate of the water tank, and a furnace base is provided under the water tank, and a combustion chamber inserted into the furnace body through the air intake channel is arranged in the furnace base. Disk, the combustion disk is the feed channel.

As a preferred solution, horizontally arranged guide rails are arranged in the furnace base, and a trolley is slidably arranged on the guide rail. A driving mechanism and a lifting mechanism are arranged on the trolley. The driving mechanism is used to drive the trolley to move along the guide rail, and the lifting mechanism The top of the furnace is provided with a combustion disc, and the pulley slides along the guide rail to move the combustion disc to the right below the air intake passage. There is a furnace pad, which is provided with a large number of penetrating holes. One end of the furnace pad is connected to the bottom plate of the water tank by rotation. An inner feeding hole is provided on the side wall of the furnace body, and a feeding pipe whose two ends are respectively sealed and connected to the inner feeding hole and the outer feeding hole is arranged in the water tank.

As a preferred solution, the outer feeding hole is higher than the inner feeding hole, so that the feeding pipe is arranged obliquely, and the inner feeding hole is covered with a cover plate, and the upper end of the cover plate is hinged to the furnace through a horizontal hinge shaft. On the inner wall, the cover plate closes the inner feeding hole under the action of its own gravity.

As a preferred solution, one end of the furnace mat is connected with a rotating shaft parallel to the furnace mat, two shaft seats matching the rotating shaft are arranged on the bottom plate of the water tank, and the two ends of the rotating shaft are respectively inserted into two shafts. In the seat, the furnace pad can swing longitudinally along the rotating shaft. A baffle is vertically arranged on the bottom of the water tank on the side of the shaft seat far away from the air intake passage. The pins correspond to the holes on the furnace pad one by one. When the furnace pad swings downward around the rotating shaft, the pins can be inserted into the holes on the furnace pad.

As a preferred solution, a turntable is rotatably connected in the furnace seat, the axis of the turntable is parallel to the axis of the rotating shaft, a push rod is hinged on the turntable, the other end of the push rod is hinged to the furnace pad, and the furnace seat A power device is provided to drive the turntable to rotate, and the reciprocating rotation of the turntable drives the furnace pad to swing up and down.

The beneficial effects of the present invention are: the furnace body is arranged in the water tank, when the water tank is filled with water, the heat energy on the furnace wall can be directly transferred to the water, so that the water temperature rises rapidly, and the hot gas formed by burning in the furnace body is connected to the furnace body The metal helical smoke exhaust pipe on the top is spirally transported in the water for a long distance, so that the heat of the high-temperature gas is fully absorbed by the water, thereby greatly improving the utilization rate of the combustion heat energy of the heating furnace.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural schematic diagram of the driving mechanism in Fig. 1 .

In Figure 1~2: 1. Water tank, 2. Water inlet, 3. Water outlet, 4. Exhaust port, 5. Furnace body, 6. Metal spiral exhaust pipe, 7. Outer exhaust hole, 8. Inlet Gas channel, 9. Feed channel, 10. Gathering tray, 11. Chimney, 12. Waste gas secondary combustion separation device, 13. Water tank bottom plate, 14. Furnace seat, 15. Combustion plate, 16. Guide rail, 17. Pulley , 18, driving mechanism, 19, lifting mechanism, 20, furnace pad, 21, outer feeding hole, 22, inner feeding hole, 23, feeding pipe, 24, cover plate, 25, hinge shaft, 26, rotating shaft, 27, shaft seat, 28, baffle plate, 29, pin, 30, turntable, 31, push rod, 32, power unit, 33, ash box, 34, air supply hose, 35, valve, 36, electric motor , 37, gear, 38, rack, 39, liquid level control device, 40, ash guide plate, 41, heat sink.

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

A high-efficiency heating furnace as shown in Figure 1 includes a water tank 1, a water inlet 2 and a water outlet 3 are arranged on the water tank 1, an exhaust port 4 is arranged on the top of the water tank 1, and a furnace body 5 is arranged in the water tank 1, The furnace body 5 is connected with a number of metal spiral smoke exhaust pipes 6 connected to the interior of the furnace body 5, and the water tank 1 is provided with an outer smoke exhaust hole 7, and the high-heat gas in the furnace body 5 is sent to the outer row through the metal spiral smoke exhaust pipes 6. smoke hole 7, and discharge the water tank 1 through the outer smoke exhaust hole 7, and the water tank 1 is provided with an air inlet channel 8 and a feed channel 9 connecting the inside of the furnace body 5 and the outside of the water tank 1.

The furnace body 5 is set in the water tank 1. When the water tank 1 is filled with water, the heat energy on the furnace wall can be directly transferred to the water, so that the water temperature rises rapidly, and the hot gas formed by combustion in the furnace body 5 is connected to the furnace body 5. The metal spiral smoke exhaust pipe 6 is used for long-distance spiral transportation in the water, so that the heat of the high-temperature gas is fully absorbed by the water, thereby greatly improving the utilization rate of the combustion heat energy of the heating furnace.

In order to further improve the energy absorption of water to high-temperature gas, the sum of the pipe diameters of all metal spiral smoke exhaust pipes 6 is greater than the cross-sectional area of the intake passage, thereby reducing the moving speed of gas in the metal spiral smoke exhaust pipe, and prolonging the contact between high-temperature gas and water contact time.

In order to further improve the heat dissipation effect of the side wall of the furnace body 5 , heat dissipation fins 41 are arranged on the outer side wall of the furnace body 5 .

The furnace body 5 is T-shaped, which greatly increases the area of the top surface of the furnace body, so more metal spiral smoke exhaust pipes 6 can be installed, thereby reducing the advancing speed of high-temperature gas in the metal spiral smoke exhaust pipes 6 and improving the heat energy. Absorption efficiency, the metal spiral smoke exhaust pipe 6 is connected to the top surface of the furnace body, the high-temperature gas is discharged to the outer smoke exhaust hole 7 through the metal spiral smoke exhaust pipe 6, and is discharged outside the water tank 1 through the outer smoke exhaust hole 7 .

In order to further expand the area of the top surface of the furnace body, the top surface of the furnace body is in the shape of an upwardly arched spherical surface.

The outer smoke exhaust hole 7 is located on the top of the water tank 1, and the upper end of the metal spiral smoke exhaust pipe 6 extends upwards to the smoke exhaust hole 7. A liquid level control device is installed in the water tank 1 to control the liquid level below the metal spiral smoke exhaust pipe. 6, to cut off the water intake when the control liquid level reaches the highest point. The liquid level control device 39 can be a traditional float valve, or a liquid level detection device can be used to detect the liquid level, and the liquid level detection device can be used to detect the liquid level through the controller. The signal of the liquid level is received, and then the water is controlled by the controller. The way of controlling the water is the traditional way, that is, the water inlet is connected to the water inlet, the water inlet solenoid valve is set on the water inlet, and the controller receives the liquid level detection device. After the liquid level signal is sent, the opening and closing of the water inlet solenoid valve is controlled according to the signal, thereby controlling the water inlet (not shown in the water inlet control diagram).

When the liquid level in the water tank 1 was controlled at the upper end lower than the metal spiral smoke exhaust pipe 6, the metal spiral smoke exhaust pipe 6 could not be sealed and connected with the outer smoke exhaust hole 7, and the space above the liquid level could serve as a smoke exhaust passage, from which The gas discharged from the upper end of the metal spiral smoke exhaust pipe 6 passes through the inner space of the casing 1 above the liquid level and then is discharged from the outer smoke exhaust hole 7, which can simplify the structure of the heating furnace and reduce manufacturing costs.

The water tank 1 is provided with a gas collecting tray 10 that is sealed and connected to the outer smoke exhaust hole 7. The gas gathering tray 10 is a hollow airtight shell with an open upper end and a sealed butt joint with the outer smoke exhaust hole 7. The metal The upper ends of the spiral smoke exhaust pipes 6 are respectively sealed and connected to the lower end surface and/or the side wall of the gas collecting pan 10 and communicate with the inside of the gas collecting pan 10 .

The gas is separated from the water by the gas collecting tray 10 to prevent the gas from polluting the water in the water tank 1. The water heated by such a heating furnace can not only be used for heating, but also can be used for drinking, and the water level in the water tank can be further raised to expand the metal The contact area between the spiral smoke exhaust pipe 6 and water improves the heat energy absorption effect of water on the high-temperature gas in the metal spiral smoke exhaust pipe 6 .

The outer smoke exhaust hole 7 is connected with a chimney 11 extending outwards, and the chimney 11 is provided with a waste gas secondary combustion separation device 12, which guides and discards while treating the waste gas, separating the gas that can be combusted again and carrying it out. Secondary utilization, and for harmful gases that cannot be burned again, the three-way catalytic method is used for harmless treatment.

The furnace body 5 is fixedly connected to the center of the water tank bottom plate 13 to ensure that the water volume around the furnace body 5 is balanced, so that the water temperature in the furnace body 5 also rises in a balanced manner. There is a furnace base 14, and the furnace base 14 is provided with a combustion disc 15 inserted into the furnace body through the air inlet passage 8, and the combustion disc 15 is the feed passage 9.

The combustion disc 15 is a device for burning gas, and its structure is similar to the combustion device on the gas stove. The combustion disc 15 is connected with a gas supply hose 34, and a valve 35 is installed on the gas supply hose 34. 15. The water in the water tank 1 is heated. Compared with burning coal, its combustion process is more controllable, and the valve 35 can be adjusted according to the water temperature to control the intensity of the flame.

The furnace base 14 is provided with a horizontally arranged guide rail 16, on which a pulley 17 is slidably arranged, on which a drive mechanism 18 and a lifting mechanism 19 are arranged, and the drive mechanism 18 is used to drive the pulley 17 to move along the guide rail 16 , the driving mechanism 18 can be a hydraulic push rod arranged at one end of the guide rail 16, or an electric motor 36 fixedly connected to the pulley 17, a gear 37 is fixedly arranged on the output shaft end of the electric motor 36, and a gear 37 is fixedly arranged on the guide rail 16. The tooth bar 38 that extends along the guide rail 16 makes the gear 37 mesh with the rack 38, and then turning the gear 37 can drive the tackle 17 to move along the guide rail 16. The top of the lifting mechanism 19 is provided with a combustion disc 15, and the tackle 17 can slide along the guide rail 16 to move The combustion disc 15 moves to directly below the air intake passage 8, and the lifting mechanism 19 can raise the combustion disc 15 to be inserted into the furnace body 5, or lower the combustion disc 15 to the bottom of the water tank 1, and the air intake passage 8 is provided with a furnace Pad 20, the furnace pad 20 is provided with a large number of penetrating holes, one end of the furnace pad 20 is rotatably connected to the bottom plate 13 of the water tank, the furnace pad 20 can be rotated to break away from or cover the air intake channel, and the side wall of the water tank 1 is provided with The outer feeding hole 21, the side wall of the furnace body 5 is provided with an inner feeding hole 22, and the water tank 1 is provided with a feeding pipe 23 that is respectively sealed and connected to the inner feeding hole 22 and the outer feeding hole 21. Bore 21 , inner feed hole 22 and feed tube 23 together form feed channel 9 .

When the lifting mechanism 19 drives the burning disc 15 down to the bottom of the water tank 1, then the driving mechanism 18 drives the pulley 17 to drive the burning disc 15 away from the air intake channel 8, and then the furnace mat 20 is turned to cover the air intake channel 8, and then it can pass through The feed pipe 23 adds coal lumps into the body of furnace 5, and then drives the pulley 17 through the driving device 18 to move the combustion disk 15 to the bottom of the air intake passage 8, ignites the combustion disk 15, and uses the combustion disk 15 to ignite the coal lumps. After the block is ignited, close the combustion disc 15, and move the tackle 17 to the air intake channel 8 side again, so that the heating furnace can choose coal or gas independently, and coal burning is more convenient for saving money and gas.

The outer feeding hole 21 is higher than the inner feeding hole 22, so that the feeding pipe 23 is arranged obliquely, and the inner feeding hole 22 is covered with a cover plate 24, and the upper end of the cover plate 24 is hinged to the furnace through a hinge shaft 25 arranged horizontally. On the inner wall of the body 5, the cover plate 24 closes the inner feed hole 22 under the action of its own gravity to avoid the discharge of high-heat gas from the feed pipe 23. In order to improve the closing effect, the upper edge of the feed pipe 23 is connected to the inner wall of the furnace body 5 flush, the lower edge of the feed pipe 23 is inserted into the inner feed hole 22, so that the end face of the feed pipe 23 located in the furnace body 1 forms an inclination angle of 5 to 10 degrees with the side wall of the furnace body 1, so that the cover plate 24 can The mouth of the feed pipe 23 is better sealed.

One end of the furnace mat 20 is connected with a rotating shaft 26 parallel to the furnace mat 20, and the bottom plate of the water tank 13 is provided with two shaft seats 27 matched with the rotating shaft 26, and the two ends of the rotating shaft 26 are inserted into two shafts respectively. In the seat 27, the furnace pad 20 can be longitudinally swayed along the rotating shaft 26, and a baffle plate 28 is vertically arranged on the water tank bottom plate 13 on the side of the shaft seat 27 away from the air intake passage 8, and the baffle plate 28 is parallel to the rotating shaft 26, and the baffle plate 28 is provided with a plurality of pins 29 on the side facing the rotating shaft 26, and the pins 29 correspond to the holes on the furnace pad 20 one by one. When the furnace pad 20 swings downward around the rotating shaft 26, the pins 29 can be inserted into In the hole, remove the coal slag in the hole on the furnace pad 20, keep the furnace pad 20 ventilated, and make the coal burn fully.

A turntable 30 is rotatably connected inside the furnace seat 14, the axial direction of the turntable 30 is parallel to the axial direction of the rotating shaft 26, a push rod 31 is hinged on the turntable 30, the other end of the push rod 31 is hinged with the furnace pad 20, and the furnace seat 14 is provided with a power device 32 for driving the turntable 30 to rotate, and the reciprocating rotation of the turntable 30 drives the furnace mat 20 to swing up and down.

Because the furnace pad 20 is burning coal, its temperature is very high, and the inner space of the furnace base 14 is narrow and inconvenient for manual operation. Therefore, adopting mechanical automation to control the opening and closing of the furnace pad 20 is labor-saving and safe.

After coal burning, coal slag will fall from the hole of the furnace pad 20. In order to facilitate the cleaning of the slag, an ash receiving box 33 is also arranged in the furnace base 14, and an ash guide plate 40 is set in an area other than the ash receiving box 33 to guide the ash. The plate 40 is arranged obliquely above the ash receiving box 33, and the bottom side of the ash guiding plate 40 extends to the top of the ash receiving box 33. After the cinder falls on the ash guiding plate 40, it will roll down along the ash guiding plate 40 to the ash receiving box. In the box 33, thereby can not make in the stove seat 14 be full of cinder coal ash everywhere, to keep the cleanliness in the stove seat 14.

The high-efficiency heating furnace of the present invention can be used in domestic hot water heating systems, and water recycling can be realized through the water supply system. The heated and cooled water returns to the water tank 1 from the water inlet 2, and the heated hot water flows from the The water port 3 enters the hot water delivery pipeline of the hot water heating system to realize continuous heating, and the heating furnace has high heat absorption efficiency and good energy-saving effect.

The high-efficiency heating furnace of the present invention can also be used for drinking water supply. Because of the good heat energy absorption effect, the boiling water heating speed is fast, the fuel used is less, the cost is low, and the emission is also reduced.

Above-mentioned embodiment only illustrates the principle of the present invention and its effect, and the embodiment of partial use, and is not intended to limit the present invention; Under the premise of the concept, several modifications and improvements can also be made, which all belong to the protection scope of the present invention.

Claims (8)

1. A high-efficiency heating furnace, characterized in that it includes a water tank (1), the water tank (1) is provided with a water inlet (2) and a water outlet (3), and the top of the water tank (1) is provided with an exhaust port (4 ), the water tank (1) is provided with a furnace body (5), the furnace body (5) is connected with a number of metal spiral exhaust pipes (6) connected to the inside of the furnace body (5), and the water tank (1) is provided with an outer Smoke exhaust hole (7), the high-heat gas in the furnace body (5) is discharged to the outer smoke exhaust hole (7) through the metal spiral smoke exhaust pipe (6), and is discharged from the water tank (1) through the outer smoke exhaust hole (7). , the water tank (1) is provided with an air intake passage (8) and a feed passage (9) connecting the inside of the furnace body (5) and the outside of the water tank (1), and the furnace body (5) is fixedly connected to the bottom plate of the water tank (13 ) center, the air intake channel (8) is set on the water tank bottom plate (13), the furnace base (14) is provided under the water tank (1), and the furnace base (14) is provided with a furnace inserted through the air intake channel (8). The combustion disc (15) in the body, the furnace base (14) is provided with a guide rail (16) arranged horizontally, a pulley (17) is slidably arranged on the guide rail (16), and a driving mechanism ( 18) and a lifting mechanism (19), the driving mechanism (18) is used to drive the trolley (17) to move along the guide rail (16), the top of the lifting mechanism (19) is provided with a combustion disc (15), and the trolley (17) moves along the guide rail ( 16) Sliding can move the combustion disc (15) directly below the air intake channel (8), and the lifting mechanism (19) can lift the combustion disc (15) into the furnace body (5), or place the combustion disc (15) ) down to the bottom of the water tank (1), and a furnace pad (20) is arranged outside the air intake channel (8), and a large number of penetrating holes are arranged on the furnace pad (20), and one end of the furnace pad (20) is connected to the On the bottom plate (13) of the water tank, the furnace pad (20) can be rotated to break away from or cover the air intake channel, the side wall of the water tank (1) is provided with an external feed hole (21), and the side wall of the furnace body (5) is provided with a There is an inner feeding hole (22), and the water tank (1) is provided with a feeding pipe (23) whose two ends are respectively sealed to connect the inner feeding hole (22) and the outer feeding hole (21), and the outer feeding hole (21) is higher than the inner feeding hole (22), so that the feeding pipe (23) is arranged obliquely, and one end of the furnace pad (20) is connected with a rotating shaft (26) parallel to the furnace pad (20). 2. The high-efficiency heating furnace according to claim 1, characterized in that, the furnace body (5) is T-shaped or inverted trapezoidal, and the metal spiral exhaust pipes (6) are all connected to the top surface of the furnace body . 3. The high-efficiency heating furnace according to claim 2, characterized in that, the outer smoke exhaust hole (7) is located on the top of the water tank (1), and the upper end of the metal spiral smoke exhaust pipe (6) extends upward to the smoke exhaust hole (7), the water tank (1) is provided with a liquid level control device (39), the control liquid level is lower than the upper end of the metal spiral smoke exhaust pipe (6). 4. The high-efficiency heating furnace according to claim 3, characterized in that, the water tank (1) is provided with a gas gathering pan (10) sealed and connected to the outer smoke exhaust hole (7), the gas gathering pan ( 10) It is a hollow sealed shell with an open upper end and the open end is sealed butt joint with the outer smoke exhaust hole (7), and the upper ends of the metal spiral smoke exhaust pipes (6) are respectively sealed and connected to the lower end surface of the gas gathering tray (10) And/or on the side wall and communicate with the inside of the gas collecting tray (10). 5. The high-efficiency heating furnace according to claim 4, characterized in that, the outer smoke exhaust hole (7) is connected with a chimney (11) extending outward, and the chimney (11) is provided with a waste gas secondary combustion separation device (12). 6. The high-efficiency heating furnace according to claim 1, characterized in that, the inner feeding hole (22) is covered with a cover plate (24), and the upper end of the cover plate (24) is hinged by a horizontal hinge shaft (25) On the inner wall of the body of heater (5), the cover plate (24) closes the inner feed hole (22) under the action of its own gravity. 7. The high-efficiency heating furnace according to claim 1, characterized in that two shaft seats (27) matching the rotating shaft (26) are arranged on the bottom plate (13) of the water tank, and the rotating shaft (26) The two ends are respectively inserted into the two axle seats (27), so that the furnace pad (20) can swing longitudinally along the rotating shaft (26), and the water tank bottom plate (13) on the side of the axle seat (27) away from the air inlet passage (8) is vertically A baffle (28) is arranged to the direction, and the baffle (28) is parallel to the rotating shaft (26), and a plurality of pins (29) are arranged on the side of the baffle (28) facing the rotating shaft (26), and the pins (29) and The holes on the stove pad (20) correspond one by one, and when the stove pad (20) swung downward around the rotating shaft (26), the pins (29) can be inserted in the holes on the stove pad (20). 8. The high-efficiency heating furnace according to claim 7, characterized in that a turntable (30) is rotatably connected inside the furnace seat (14), and the axis of the turntable (30) is parallel to the axis of the rotating shaft (26) , a push rod (31) is hinged on the turntable (30), the other end of the push rod (31) is hinged to the furnace pad (20), and a power device (32) for driving the turntable (30) to rotate is arranged in the furnace seat (14) ), the reciprocating rotation of the turntable (30) drives the furnace pad (20) to swing up and down.

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