Temperature control structure of metal product heating furnace

Abstract

The utility model discloses a kind of temperature control structure of metal product heating furnace, it is related to heating furnace field, to solve the problem that the heating furnace in prior art is not set air and gas input temperature control mechanism, leading to air and gas into heating furnace when temperature is lower, influence combustion efficiency.The heating furnace main body rear end is provided with heat exchange water tank, the heating furnace main body both sides end face middle part is connected with gas delivery pipe, two the gas delivery pipe front end extends to heating furnace main body inside and is uniformly fixed with gas burner, the heating furnace main body upper end surface middle part is fixed with air pipe, the air pipe rear end is fixedly connected with the upper end of heat exchange water tank front end surface, the heating furnace main body rear end middle part is fixed with flue, the flue rear end is fixedly connected with the heat exchange water tank front end surface, by setting heat exchange water tank and three-stage heat exchange structure, preheat gas and air using high-temperature flue gas waste heat, combustion efficiency of gas is significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of heating furnaces, specifically a temperature control structure for a metal product heating furnace. Background Technology

[0002] A heating furnace is an industrial device that uses heat energy generated by fuel combustion or electrical energy conversion to heat materials. It is widely used in metallurgy, chemical industry, machinery manufacturing and other fields. Its core structure includes the furnace body, combustion system, heating chamber, temperature control system and flue, etc., and transfers heat to the workpiece through radiation, convection or conduction.

[0003] For example, patent announcement number CN222856641U discloses a precision temperature-controlled gas-fired forging heating furnace, including a combustion furnace. An air filter box is provided on one side of the combustion furnace. The air outlet of the air filter box is sealed to the oxygen inlet of the combustion furnace via an air inlet pipe. A blower is fixedly installed at the air inlet of the air filter box. This application uses a gas pipe, control valve, and burner to spray flames into the combustion furnace. After inserting the fixing frame into the mounting groove, a limiting unit limits and fixes the fixing frame, facilitating the installation of filter cotton inside the air filter box. This allows the air supplied by the blower to be filtered and adsorbed by the air filter box, removing dust and other impurities. This ensures that the air entering the combustion furnace through the air inlet pipe is free of impurities, preventing a large amount of dust from adhering to the inner wall of the air inlet pipe and affecting the airflow. This ensures that the gas inside the combustion furnace can burn completely.

[0004] However, in the above-mentioned technologies, the heating furnace filters the air through a filtration mechanism, but does not have an air and gas input temperature control mechanism, resulting in low temperatures when the air and gas enter the heating furnace, which affects the combustion efficiency. Therefore, the market urgently needs to develop a temperature control structure for metal product heating furnaces to help people solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide a temperature control structure for a metal product heating furnace, so as to solve the problem mentioned in the background art that the heating furnace filters the air through a filter mechanism, but does not set an air and gas input temperature control mechanism, resulting in the air and gas entering the heating furnace at a low temperature, which affects the combustion efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a temperature control structure for a metal product heating furnace, comprising a heating furnace body and a hot water exchange tank. The hot water exchange tank is located at the rear end of the heating furnace body. Gas delivery pipes are connected to the middle of both end faces of the heating furnace body. The front ends of the two gas delivery pipes extend into the interior of the heating furnace body and are fixedly connected to gas burners. The rear ends of the two gas delivery pipes extend to the front end of the hot water exchange tank and are connected to a connecting pipe. An air pipe is fixedly connected to the middle of the upper end face of the heating furnace body. The rear end of the air pipe is fixedly connected to the upper end of the front end face of the hot water exchange tank. An exhaust pipe is fixedly connected to the middle of the rear end face of the heating furnace body. The rear end of the exhaust pipe is fixedly connected to the front end face of the hot water exchange tank.

[0007] Preferably, a heat insulation plate is fixedly connected to the lower middle part of the interior of the heating furnace body, a support plate is provided at the upper part of the heat insulation plate, a temperature measuring probe is fixedly provided on one side of the interior of the heating furnace body, and the outer end of the temperature measuring probe extends out of one side of the heating furnace body and is fixedly connected to a temperature measuring module.

[0008] Preferably, the rear end of the connecting pipe extends into the interior of the hot water exchange tank and is fixedly connected to a first gas collecting hood. Inside the hot water exchange tank, a first gas distributing hood is provided at the rear end of the first gas collecting hood. The first gas collecting hood and the first gas distributing hood are connected by a plurality of first heat exchange pipes. A gas inlet pipe is fixedly connected to the rear end of the first gas distributing hood, and the rear end of the gas inlet pipe extends out of the rear end face of the hot water exchange tank.

[0009] Preferably, the rear end of the air pipe extends into the interior of the hot water exchange tank and is fixedly connected to a second gas collecting hood. Inside the hot water exchange tank, a second gas distributing hood is provided at the rear end of the second gas collecting hood. The second gas collecting hood and the second gas distributing hood are connected by a plurality of second heat exchange pipes. An air inlet pipe is fixedly connected to the rear end of the second gas distributing hood, and the rear end of the air inlet pipe extends out of the rear end face of the hot water exchange tank.

[0010] Preferably, the exhaust pipe extends to the interior of the hot water exchange tank and is fixedly connected to a third gas distribution hood. Inside the hot water exchange tank, a third gas collection hood is provided at the rear end of the third gas distribution hood. The third gas distribution hood and the third gas collection hood are connected by multiple third heat exchange pipes. The rear end of the third gas collection hood is fixedly connected to a flue gas exhaust pipe, and the rear end of the flue gas exhaust pipe extends out of the rear end face of the hot water exchange tank.

[0011] Preferably, a water injection pipe is fixedly connected to the lower end of one side face of the hot water tank, a three-way valve is fixedly connected to the water injection pipe, the upper end of the three-way valve is connected to the upper end of one side face of the hot water tank through a circulation pipe, and a circulation pump is fixedly connected to the circulation pipe.

[0012] Preferably, a pressure relief valve is fixedly connected to the middle of the upper end face of the hot water tank, and a drain valve is fixedly connected to the lower end of the other end face of the hot water tank.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, by setting up a hot water exchange tank and a three-stage heat exchange system, the waste heat of high-temperature flue gas is used to preheat the gas and air, which significantly improves the gas combustion efficiency, reduces energy waste, and lowers fuel consumption costs.

[0015] (2) In this utility model, a forced water circulation system driven by a circulating pump is adopted to ensure that the water temperature in the hot water tank is evenly distributed, making the preheating temperature of gas and air more stable, thereby ensuring the uniformity and controllability of the temperature in the heating furnace and improving the heating quality.

[0016] (3) In this utility model, the safe operation and convenient maintenance of the hot water exchange tank system are achieved by setting the pressure relief valve and the drain valve. The pressure relief valve can effectively prevent the internal pressure of the hot water exchange tank from being too high, and the drain valve facilitates the regular cleaning and replacement of the circulating water, so that the circulating water can be used separately after being heated and discharged, which further improves the reliability and service life of the system. Attached Figure Description

[0017] Figure 1 This is a front view of the temperature control structure of a metal product heating furnace according to the present invention;

[0018] Figure 2 This is a front sectional view of the heating furnace body of this utility model;

[0019] Figure 3 This is a side sectional view of the present invention;

[0020] Figure 4 This is a main sectional view of the hot water exchange tank of this utility model.

[0021] In the diagram: 1. Main body of the heating furnace; 101. Insulation plate; 102. Support plate; 103. Temperature probe; 104. Temperature module; 2. Gas delivery pipe; 201. Gas burner; 202. Connecting pipe; 203. First gas collection hood; 204. First gas distribution hood; 205. First heat exchange tube; 206. Gas inlet pipe; 3. Air pipe; 301. Second gas collection hood; 302. Second gas distribution hood; 303. Second heat exchange tube; 304. Air inlet pipe; 4. Exhaust pipe; 401. Third gas distribution hood; 402. Third gas collection hood; 403. Third heat exchange tube; 404. Flue gas exhaust pipe; 5. Hot water tank; 501. Pressure relief valve; 502. Water injection pipe; 503. Three-way valve; 504. Circulation pipe; 505. Circulation pump; 506. Drain valve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4 This utility model provides an embodiment of a temperature control structure for a metal product heating furnace, comprising a furnace body 1 and a hot water tank 5. A heat insulation plate 101 is fixedly connected to the lower middle part of the furnace body 1. A support plate 102 is provided at the upper end of the heat insulation plate 101. A temperature probe 103 is fixedly installed on one side of the furnace body 1. The outer end of the temperature probe 103 extends out of one side of the furnace body 1 and is fixedly connected to a temperature measuring module 104. The hot water tank 5 is located at the rear end of the furnace body 1. Gas supply pipes 2 are connected to the middle of both sides of the furnace body 1. The front ends of the two gas supply pipes 2 extend into the furnace body 1 and are fixedly connected to gas burners 201. The rear end of the gas supply pipe 2 extends to the front end of the hot water exchange tank 5 and is connected to a connecting pipe 202. An air pipe 3 is fixedly connected to the middle of the upper end face of the heating furnace body 1. The rear end of the air pipe 3 is fixedly connected to the upper end of the front end face of the hot water exchange tank 5. An exhaust pipe 4 is fixedly connected to the middle of the rear end face of the heating furnace body 1. The rear end of the exhaust pipe 4 is fixedly connected to the front end face of the hot water exchange tank 5. The metal product to be heated is placed on the support plate 102. Gas is supplied to the two gas burners 201 through the two gas supply pipes 2 respectively. The metal product is heated through the two gas burners 201. During heating, air is supplied to the interior of the heating furnace body 1 through the air pipe 3. At the same time, the flue gas inside the heating furnace body 1 is discharged through the exhaust pipe 4.

[0024] Please see Figure 3 and Figure 4 A water injection pipe 502 is fixedly connected to the lower end of one side of the hot water tank 5. A three-way valve 503 is fixedly connected to the water injection pipe 502. A large amount of clean water is injected into the hot water tank 5 through the water injection pipe 502 and the three-way valve 503. The rear end of the exhaust pipe 4 extends into the hot water tank 5 and is fixedly connected to a third vent 401. A third vent 402 is set inside the hot water tank 5 at the rear end of the third vent 401. Multiple third heat exchange pipes connect the third vent 401 and the third vent 402. 403 is connected, and the rear end of the third gas collecting hood 402 is fixedly connected to the flue gas exhaust pipe 404. The rear end of the flue gas exhaust pipe 404 extends out of the rear end face of the hot water exchange tank 5. The flue gas inside the heating furnace body 1 enters the third gas distribution hood 401 through the exhaust pipe 4, and is dispersed into multiple third heat exchange tubes 403 through the third gas distribution hood 401, thereby enabling the third heat exchange tubes 403 to heat the clean water inside the hot water exchange tank 5. The flue gas flows backward through multiple third heat exchange tubes 403 into the third gas collecting hood 402 and is discharged through the exhaust pipe 4.

[0025] Please see Figure 3and Figure 4 The rear end of the connecting pipe 202 extends into the interior of the hot water exchange tank 5 and is fixedly connected to the first gas collecting hood 203. Inside the hot water exchange tank 5, a first gas distribution hood 204 is set at the rear end of the first gas collecting hood 203. The first gas collecting hood 203 and the first gas distribution hood 204 are connected by multiple first heat exchange pipes 205. The rear end of the first gas distribution hood 204 is fixedly connected to a gas inlet pipe 206. The rear end of the gas inlet pipe 206 extends out of the rear end face of the hot water exchange tank 5. The gas first enters the interior of the first gas distribution hood 204 through the gas inlet pipe 206, and is then distributed to multiple first heat exchange pipes 205 through the first gas distribution hood 204. The clean water heated inside the hot water exchange tank 5 preheats the multiple first heat exchange pipes 205, thereby preheating the gas as it flows through the interior of the first heat exchange pipes 205. After flowing backward through the multiple first heat exchange pipes 205 into the first gas collecting hood 203, the gas is then transported to the two gas delivery pipes 2 through the connecting pipe 202.

[0026] Please see Figure 3 and Figure 4 The rear end of the air pipe 3 extends into the interior of the hot water exchange tank 5 and is fixedly connected to the second gas collection hood 301. Inside the hot water exchange tank 5, a second gas distribution hood 302 is provided at the rear end of the second gas collection hood 301. The second gas collection hood 301 and the second gas distribution hood 302 are connected by a plurality of second heat exchange pipes 303. The rear end of the second gas distribution hood 302 is fixedly connected to an air inlet pipe 304. The rear end of the air inlet pipe 304 extends out of the rear end face of the hot water exchange tank 5. Air first enters the interior of the second gas distribution hood 302 through the air inlet pipe 304, and is then distributed to the plurality of second heat exchange pipes 303 through the second gas distribution hood 302. The plurality of second heat exchange pipes 303 are preheated by the clean water heated inside the hot water exchange tank 5, thereby preheating the air as it flows through the second heat exchange pipes 303. After flowing backward through the plurality of second heat exchange pipes 303 into the second gas collection hood 301, it enters the interior of the heating furnace body 1 through the air pipe 3.

[0027] Please see Figure 4 The upper end of the three-way valve 503 is connected to the upper end of one side of the hot water exchange tank 5 via a circulation pipe 504. A circulation pump 505 is fixedly connected to the circulation pipe 504. After the hot water exchange tank 5 is filled with water, the three-way valve 503 switches to connect the circulation pipe 504, the water injection pipe 502 and the inside of the hot water exchange tank 5. The circulation pump 505 makes the clean water inside the hot water exchange tank 5 circulate through the circulation pipe 504 and the water injection pipe 502, improving the heating uniformity of the clean water inside the hot water exchange tank 5. A pressure relief valve 501 is fixedly connected to the middle of the upper end of the hot water exchange tank 5, and a drain valve 506 is fixedly connected to the lower end of the other side of the hot water exchange tank 5.

[0028] Working principle: In use, firstly, clean water is injected into the hot water tank 5 through the water injection pipe 502 and the three-way valve 503. The circulation pump 505 is started to make the clean water circulate between the hot water tank 5, the circulation pipe 504 and the water injection pipe 502 to ensure uniform water temperature. The gas enters the first gas distribution hood 204 through the gas inlet pipe 206, is preheated by multiple first heat exchange pipes 205 and then flows into the first gas collection hood 203. It is then transported to the gas burner 201 through the connecting pipe 202 and the gas delivery pipe 2. At the same time, air enters the second gas distribution hood 302 through the air inlet pipe 304, is preheated by the second heat exchange pipe 303 and then flows into the second gas collection hood 301. It then enters the heating furnace body 1 through the air pipe 3. After the gas burner 201 is ignited, it heats the metal components on the support plate 102. The resulting flue gas enters the third gas distribution hood 401 through the exhaust pipe 4, and then transfers its residual heat to the clean water in the hot water tank 5 through the third heat exchange pipe 403 before finally being discharged through the flue gas exhaust pipe 404. The temperature probe 103 monitors the furnace temperature in real time. This structure fully utilizes the waste heat of the flue gas to preheat the gas and air through a three-stage heat exchange system, significantly improving combustion efficiency and heating uniformity.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A temperature control structure for a metal product heating furnace, comprising a furnace body (1) and a hot water exchange tank (5), characterized in that: A hot water tank (5) is provided at the rear end of the heating furnace body (1). Gas supply pipes (2) are connected to the middle of both ends of the heating furnace body (1). The front ends of the two gas supply pipes (2) extend into the interior of the heating furnace body (1) and are fixedly connected to gas burners (201). The rear ends of the two gas supply pipes (2) extend to the front end of the hot water tank (5) and are connected to a connecting pipe (202). An air pipe (3) is fixedly connected to the middle of the upper end of the heating furnace body (1). The rear end of the air pipe (3) is fixedly connected to the upper end of the front end of the hot water tank (5). A flue pipe (4) is fixedly connected to the middle of the rear end of the heating furnace body (1). The rear end of the flue pipe (4) is fixedly connected to the front end of the hot water tank (5).

2. The temperature control structure of a metal product heating furnace according to claim 1, characterized in that: A heat insulation plate (101) is fixedly connected to the lower middle part of the interior of the heating furnace body (1). A support plate (102) is provided on the upper end of the heat insulation plate (101). A temperature measuring probe (103) is fixedly provided on one side end face of the interior of the heating furnace body (1). The outer end of the temperature measuring probe (103) extends out of one side end face of the heating furnace body (1) and is fixedly connected to a temperature measuring module (104).

3. The temperature control structure of a metal product heating furnace according to claim 1, characterized in that: The rear end of the connecting pipe (202) extends into the interior of the hot water exchange tank (5) and is fixedly connected to a first gas collecting hood (203). Inside the hot water exchange tank (5), a first gas distributing hood (204) is provided at the rear end of the first gas collecting hood (203). The first gas collecting hood (203) and the first gas distributing hood (204) are connected by multiple first heat exchange pipes (205). A gas inlet pipe (206) is fixedly connected to the rear end of the first gas distributing hood (204). The rear end of the gas inlet pipe (206) extends out of the rear end face of the hot water exchange tank (5).

4. The temperature control structure of a metal product heating furnace according to claim 1, characterized in that: The rear end of the air pipe (3) extends into the interior of the hot water tank (5) and is fixedly connected to a second gas collecting hood (301). Inside the hot water tank (5), a second gas distributing hood (302) is provided at the rear end of the second gas collecting hood (301). The second gas collecting hood (301) and the second gas distributing hood (302) are connected by a plurality of second heat exchange pipes (303). The rear end of the second gas distributing hood (302) is fixedly connected to an air inlet pipe (304), and the rear end of the air inlet pipe (304) extends out of the rear end face of the hot water tank (5).

5. The temperature control structure of a metal product heating furnace according to claim 1, characterized in that: The exhaust pipe (4) extends to the interior of the hot water tank (5) and is fixedly connected to a third gas distribution hood (401). Inside the hot water tank (5), a third gas collection hood (402) is provided at the rear end of the third gas distribution hood (401). The third gas distribution hood (401) and the third gas collection hood (402) are connected by multiple third heat exchange pipes (403). The rear end of the third gas collection hood (402) is fixedly connected to a flue gas exhaust pipe (404), and the rear end of the flue gas exhaust pipe (404) extends out of the rear end face of the hot water tank (5).

6. The temperature control structure of a metal product heating furnace according to claim 1, characterized in that: A water injection pipe (502) is fixedly connected to the lower end of one side face of the hot water tank (5). A three-way valve (503) is fixedly connected to the water injection pipe (502). The upper end of the three-way valve (503) is connected to the upper end of one side face of the hot water tank (5) through a circulation pipe (504). A circulation pump (505) is fixedly connected to the circulation pipe (504).

7. The temperature control structure of a metal product heating furnace according to claim 1, characterized in that: A pressure relief valve (501) is fixedly connected to the middle of the upper end face of the hot water tank (5), and a drain valve (506) is fixedly connected to the lower end of the other end face of the hot water tank (5).

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