Furnace and furnace body structure thereof

Abstract

This utility model provides a furnace and its furnace body structure. The furnace body structure includes a furnace body and a crucible. The furnace body has a furnace chamber with a top opening. The crucible is installed at the opening end of the furnace body. A support wall is provided on the bottom surface of the furnace chamber. One end of the support wall is connected to the inner wall of the furnace chamber, and the other end forms a gas passage gap with the inner wall of the furnace chamber at the other end. Two gas guide holes are opened on the peripheral wall of the furnace body corresponding to the connection with the support wall. The two gas guide holes are located on both sides of the support wall. The crucible is installed in the furnace chamber, sealing the top opening of the furnace chamber. The bottom surface of the crucible abuts against the support wall. There is a gap between the outer peripheral surface of the crucible and the inner peripheral surface of the furnace chamber, and it is sealed to the end of the furnace inner wall with the gas guide hole. A looping gas guide channel is separated from the crucible by the support wall in the furnace chamber. Hot gas entering the furnace chamber from one of the gas guide holes flows along the gas guide channel and exits from the other gas guide hole. The furnace with the above furnace body structure is conducive to uniform heating of the crucible and full utilization of heat.

Description

Technical Field

[0001] This utility model relates to the field of furnace technology, and in particular to a furnace and its furnace body structure. Background Technology

[0002] A furnace is an industrial furnace used to melt solid metal into a liquid state. The molten metal is then poured into a mold for casting. Furnaces typically employ a structure where a furnace body and a crucible are combined. The crucible is placed in the furnace chamber, and flames are injected into the chamber using torches to heat the bottom of the crucible, melting the metal inside. This type of furnace is not conducive to uniform heating of the entire crucible bottom or efficient heat utilization. Heat is locally concentrated at the front of the crucible bottom, corresponding to the torch area, rather than being evenly heated across the entire bottom. Furthermore, the high localized heat may escape directly through nearby exhaust vents, resulting in heat loss and inefficient heat utilization. Utility Model Content

[0003] In view of the above, this utility model provides a furnace body structure that uses gas heating, which is conducive to uniform heating of the crucible and full utilization of heat.

[0004] The technical solution involved in this utility model is:

[0005] A furnace body structure includes a furnace body and a crucible. The furnace body has a furnace chamber with a top opening. The crucible is installed at the opening end of the furnace body. A support wall is provided on the bottom surface of the furnace chamber. One end of the support wall is connected to the inner wall of the furnace chamber, and the other end extends to the other end of the furnace chamber, forming an air passage gap with the inner wall of the furnace chamber at the other end.

[0006] Two air guide holes are opened on the peripheral wall of the furnace body at the connection with the support wall, and the two air guide holes are located on both sides of the support wall.

[0007] The crucible is installed inside the furnace chamber, sealing the opening at the top of the furnace chamber. The bottom surface of the crucible abuts against the support wall. There is a gap between the outer circumferential surface of the crucible and the inner circumferential surface of the furnace chamber, and the crucible is sealed to one end of the inner wall of the furnace chamber with a gas guide hole.

[0008] Inside the furnace, a spiral gas channel is separated from the crucible by a supporting wall. Hot gas entering the furnace through one of the gas channels flows along the gas channel, enters the crucible from one side and exits from the other gas channel.

[0009] Furthermore, a partition wall is provided on the top surface of one end of the support wall connected to the inner wall of the furnace. The partition wall connects the inner wall of the furnace and the peripheral wall of the crucible, and extends upward to the top opening end of the furnace. The partition wall isolates the two gas guide holes near each other in the furnace, preventing airflow between the two gas guide holes near the furnace.

[0010] Furthermore, the furnace body is provided with a leakage detection structure, which includes a drain pipe installed on the side wall of the furnace body and a monitoring sensor installed inside the drain pipe. One end of the drain pipe extends through the side wall of the furnace chamber to the bottom surface of the furnace chamber, and the other end extends out of the furnace body.

[0011] Furthermore, a horizontally extending rim is formed at the top of the outer peripheral wall of the crucible, which is used to seal and press against the top opening of the furnace.

[0012] In addition, a furnace is provided, including the aforementioned furnace body structure and a heating mechanism installed on the outer periphery of the furnace body. The heating mechanism includes two burners, two heat storage bodies, a reversing valve, and a fan. The two burners are respectively installed corresponding to two air guide holes. The ignition nozzle of each burner extends into the corresponding air guide hole so that the generated heat flows through the furnace chamber from the corresponding air guide hole along the air guide channel and is discharged from the other air guide hole. The two heat storage bodies are respectively set corresponding to the two air guide holes. The bottom end of the heat storage body is connected to the air guide hole so that the exhaust gas discharged from the air guide hole is stored in the corresponding heat storage body. The reversing valve includes four valve ports, three of which are respectively connected to the top of the two heat storage bodies and the fan. After the reversing valve is reversed, the heat stored in the exhaust gas is sent back to the furnace chamber for utilization by the fan.

[0013] Furthermore, the upper end of the heat storage body forms an upper chamber, and the lower end forms a lower chamber. The lower chamber wall has a through hole that is aligned and connected to the air guide hole. The reversing valve is a four-way valve with a valve plate inside. The two opposite valve ports of the reversing valve are connected to the upper chambers at the upper ends of the two heat storage bodies. The third valve port is connected to the fan, and the fourth valve port is the exhaust port for discharging exhaust gas.

[0014] Furthermore, the heating mechanism includes a gas delivery component, a burner installed in the lower chamber of the heat storage body, and the burner includes a burner body and an ignition nozzle installed at one end of the burner body, with the ignition nozzle facing the gas guide hole, and the burner body connected to the gas delivery component.

[0015] Furthermore, the gas delivery component includes a gas pipe and a gas control valve. The gas pipe is a three-way pipe, including a main pipe and two branch pipes connected to one end of the main pipe. The main pipe is connected to a gas source, and the two branch pipes are connected to the burner bodies of two burners respectively. There are two gas control valves installed on the two branch pipes to control the on / off state of the branch pipes.

[0016] Furthermore, the burner is installed in the lower chamber of the heat storage body. The burner includes a burner body, one end of which is connected to a gas pipe and an air pipe, and the other end is an ignition end. The ignition end forms a mixing chamber facing the air guide hole, so that the gas and air can be burned in the mixing chamber and sprayed out as flames towards the air guide hole.

[0017] Furthermore, the burner is fixedly installed on the peripheral wall of the furnace body. The burner includes a burner body, one end of which is connected to a gas pipe and an air pipe, and the other end is an ignition end. The ignition end forms a mixing chamber, which extends into the furnace chamber and faces the corresponding air guide hole.

[0018] Compared with the prior art, the furnace provided by this utility model has the following beneficial effects:

[0019] By setting a support wall on the bottom surface of the furnace, with one end of the support wall connected to the inner wall of the furnace and the other end forming a gas passage gap with the inner wall of the furnace, and two gas guide holes opened on the peripheral wall of the furnace corresponding to the two sides of the support wall, the crucible is installed in the furnace, the top opening of the furnace is closed, the bottom surface abuts against the support wall, a gap is formed between the outer peripheral surface of the crucible and the inner peripheral surface of the furnace, and one end of the crucible is sealed to the end of the inner wall of the furnace with the gas guide hole, so that a looping gas guide channel is separated from the crucible in the furnace by the support wall, the gas enters the furnace from one of the gas guide holes, flows along the gas guide channel, and is discharged from the other gas guide hole, which expands the heat conduction path and the contact area of ​​the crucible, so as to achieve full heating and uniform heating of the crucible, and full utilization of heat.

[0020] By setting the heating mechanism outside the furnace and communicating with it, the burner of the heating mechanism can be implemented in at least three ways. Two burners are installed corresponding to two air guide holes, and the ignition nozzle of the burner extends into the corresponding air guide hole so that the generated heat flows through the furnace along the air guide channel from the corresponding air guide hole and is discharged from the other air guide hole. Two heat storage bodies are set corresponding to two air guide holes so that after the burner at one air guide hole releases heat, the exhaust gas is discharged from the furnace through the other air guide hole and enters the corresponding heat storage body for heat storage. After the reversing valve reverses, the heat stored in the exhaust gas can be sent back to the furnace for continued use. The furnace provided by this utility model greatly improves the heat utilization rate and saves energy. Attached Figure Description

[0021] Figure 1 This is a perspective view of the furnace of this utility model;

[0022] Figure 2 This is a partial cross-sectional view of the furnace body structure;

[0023] Figure 3 for Figure 1 Axonometric sectional view;

[0024] Figure 4 A perspective view of the furnace without the crucible installed;

[0025] Figure 5 A view of one side of the furnace;

[0026] Figure 6This is a cross-sectional view of the ventilation valve.

[0027] The following labels are shown in the attached diagram:

[0028] 1. Furnace structure; 11. Furnace body; 110. Gas passage notch; 111. Furnace chamber; 112. Gas duct; 113. Support wall; 114. Drain pipe; 115. Cover; 12. Crucible; 121. Cauldron rim; 122. Lifting hole; 13. Insulation layer; 2. Heating mechanism; 21. Heat storage body; 211. Upper chamber; 212. Lower chamber; 213. Heat storage body; 22. Reversing valve; 221. Valve plate; 23. Burner; 231. Burner body; 24. Fan; 241. Air duct; 25. Gas delivery component; 251. Gas conduit; 252. Gas control valve; 253. Gas meter; 254. Pressure gauge; 255. Flow valve; 26. Cover; 31. Control cabinet; 32. First alarm; 33. Second alarm. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of protection of the present invention.

[0030] Example 1

[0031] Please see Figure 1 , Figure 2 This utility model provides a furnace, including a furnace body structure 1 and a heating mechanism 2 installed on the outside of the furnace body structure 1.

[0032] The furnace structure 1 includes a furnace body 11 and a crucible 12 disposed on the furnace body 11. The furnace body 11 has a furnace chamber 111. A heating mechanism 2 is installed on the outside of the furnace body 11 and communicates with the furnace chamber 111. The heating mechanism 2 burns gas to generate heat, which enters the furnace chamber 111 to heat the crucible 12, causing the metal inside the crucible 12 to melt.

[0033] Please see Figures 2-4 The furnace body 11 has a long, slotted furnace chamber 111 with an opening at the top. Two air guide holes 112 are provided on the inner wall of the furnace chamber 111 near the heating mechanism 2. One air guide hole 112 guides the hot air generated by the heating mechanism 2 into the furnace chamber 111, while the other air guide hole 112 vents the exhaust gas from the furnace chamber 111. A support wall 113 is installed on the bottom surface of the furnace chamber 111. One end of the support wall 113 is connected to the inner wall of one end of the furnace chamber 111, corresponding to the two air guide holes 112. The other end extends into the furnace chamber 111, forming an air passage gap 110 with the inner wall of the other end of the furnace chamber 111. Preferably, the top surface of the support wall 113 extends above the air guide holes 112.

[0034] The crucible 12 is installed into the furnace chamber 111 through the top opening of the furnace body 11. A gap is formed between its outer peripheral wall and the inner wall of the furnace chamber 111. One end of the crucible 12 is sealed to the end of the inner wall of the furnace body 11 that has a gas guide hole 112. Specifically, the outer peripheral surface of one end of the crucible 12 can directly abut against the inner wall of the furnace chamber 111 at the end with two gas guide holes 112, thereby isolating the two gas guide holes 112 in the vicinity of the furnace chamber 111 and preventing airflow from the two gas guide holes 112 in the vicinity.

[0035] Understandably, if a gap is formed between the crucible 12 and the inner wall of the furnace 111 at the corresponding gas guide hole 112 after installation, a partition wall can be provided on the top surface of one end of the support wall 113 connected to the inner wall of the furnace 111. The partition wall is located at the gap between the inner wall of the furnace 111 at the two gas guide holes 112 and the circumferential surface of the crucible 12, connecting the inner wall of the furnace 111 and the circumferential wall of the crucible 12, and the top of the partition wall extends to the top opening end of the furnace 111. The partition wall isolates the two gas guide holes 112 from each other. The bottom surface of the crucible 12 presses against the support wall 113, allowing hot gas to flow around the channel between the side wall of the crucible 12 and the inner wall of the furnace 111. Thus, by extending the flow path of the hot gas, the heat utilization rate can be improved, and the flowing heat can fully contact the bottom and sides of the crucible 12, accelerating the heating of the crucible 12 and making the crucible 12 heated evenly. Furthermore, the bottom surface of the crucible 12 abutting against the top surface of the support wall 113 can also enhance the stability of the crucible 12 installed in the furnace chamber 111. Understandably, side protrusions can be provided on both sides of the support wall 113 to block some of the direct heat flow. The blocked heat can rise to the upper side wall of the crucible 12 and be heated along the upper side wall of the crucible 12.

[0036] The crucible 12 has a melting cavity with a liquid outlet at the top. A horizontally extending eave 121 is formed on the top of the outer peripheral wall of the crucible 12, which presses against the opening at the top of the furnace chamber 111. Furthermore, a lifting hole 122 is provided on the eave 121 to facilitate lifting the crucible 12 into the furnace chamber 111. Simultaneously, bolts can be inserted into the lifting hole 122 to connect with the top surface of the furnace body 11, securing the crucible 12 after it is placed inside the furnace chamber 111. Furthermore, a heat insulation layer 13 is sandwiched between the eave 121 and the opening of the furnace chamber 111. The heat insulation layer 13 seals the gap between the eave 121 and the opening of the furnace chamber 111, improving the sealing between the eave 121 and the top of the furnace chamber 111 and preventing heat loss from the furnace chamber 111 at the opening.

[0037] Understandably, the crucible 12 may be damaged during use, such as cracking due to prolonged high-temperature heating. To prevent molten metal from flowing into the furnace 111 after the crucible 12 is damaged and cracked, thus avoiding the risk of the furnace 111 becoming unusable due to excess molten metal, a leakage detection structure is installed on the furnace body 11. The leakage detection structure includes a drain pipe 114 installed on the side wall of the furnace body 11 and a monitoring sensor (not shown) installed in the drain pipe 114. One end of pipe 114 extends through the side wall of furnace 111 to the bottom surface of furnace 111, and the other end extends outside the furnace body 11. When crucible 12 cracks and molten metal flows into furnace 111, it will flow into drain pipe 114. The monitoring sensor will detect the presence of molten metal in drain pipe 114 and will promptly trigger an alarm. Furthermore, the molten metal in furnace 111 can be discharged through drain pipe 114, preventing it from accumulating in furnace 111 and damaging it or obstructing the flow of hot gas. Further, the leakage detection structure also includes a cover 115 installed at the outer port of drain pipe 114. The cover 115 is hinged to the port of drain pipe 114 to close drain pipe 114 under normal conditions, preventing hot gas leakage from furnace 111.

[0038] like Figures 3-5 As shown, the heating mechanism 2 includes a heat storage body 21, a reversing valve 22, a burner 23, a fan 24, and a gas delivery component 25. There are two heat storage bodies 21, which are arranged side by side on the outer periphery of the furnace body 11, corresponding to the air guide holes 112. The upper end of the heat storage body 21 forms an upper chamber 211, the lower end forms a lower chamber 212, and the middle is the heat storage body 213. The airflow between the upper chamber 211 and the lower chamber 212 can flow through the heat storage body 213. The heat storage body 213 is used to absorb or release heat from the flowing airflow. The lower chamber 212 has through holes on its wall that are aligned and connected to the air guide holes 112.

[0039] The reversing valve 22 is a four-way valve with a valve plate 221 inside. The two opposite valve ports of the reversing valve 22 are connected to the upper chamber 211 at the upper end of the two heat storage bodies 21. The third valve port is connected to the fan 24 through a pipe. The fourth valve port is empty and is the exhaust port for discharging exhaust gas.

[0040] The burner 23 is installed in the lower chamber 212 of the heat storage body 21. The burner 23 includes a burner body 231 and an ignition nozzle (not shown) installed at one end of the burner body 231. The burner body 231 is connected to the gas delivery component 25 to deliver gas into the burner body 231. The ignition nozzle faces the gas guide hole 112. After being ignited by the ignition nozzle, the flame is sprayed into the gas guide hole 112, and the heat generated by the flame enters the furnace 111.

[0041] In this embodiment, the blower 24 is fixedly installed on the bottom side of the outer peripheral wall of the furnace body 11. The blower 24 is connected to one valve port of the reversing valve 22 through the air guide pipe 241. The airflow delivered by the blower 24 is switched by the valve plate 221 to form two air paths. For ease of explanation, the two heat storage bodies 21 are referred to as the first heat storage body and the second heat storage body, and the two air guide holes 112 are referred to as the first air guide hole and the second air guide hole. The first heat storage body is connected to the first air guide hole, and the second heat storage body is connected to the second air guide hole.

[0042] See also Figure 6 The first gas path is as follows: the fan 24 delivers airflow into the reversing valve 22. The valve plate 221 of the reversing valve 22 guides the airflow to the upper chamber 211 of the corresponding first heat storage body. The airflow passes through the heat storage body 213 of the first heat storage body and enters the lower chamber 212. In the lower chamber 212, it combines with the gas supplied by the corresponding burner 23 and is ignited by the igniter. The ignited flame or heat enters the furnace 111 through the first air guide hole to heat the crucible 12. The heated exhaust gas is discharged from the second air guide hole, enters the lower chamber 212 of the second heat storage body, then flows through the heat storage body of the second heat storage body into the upper chamber 211, and then flows into the reversing valve 22, and is discharged from the exhaust port of the reversing valve 22. During this process, the second heat storage body stores heat in the exhaust gas.

[0043] The second gas path is as follows: the fan 24 delivers airflow into the reversing valve 22. The valve plate 221 of the reversing valve 22 guides the airflow to the upper chamber 211 of the corresponding second heat storage body. The airflow passes through the heat storage body 213 of the second heat storage body and enters the lower chamber 212. In the lower chamber 212, it combines with the gas supplied by the corresponding burner 23 and is ignited by the igniter. The ignited flame or heat enters the furnace 111 through the second air guide hole to heat the crucible 12. The heated exhaust gas is discharged from the first air guide hole, enters the lower chamber 212 of the first heat storage body, then flows through the heat storage body of the first heat storage body into the upper chamber 211, and then flows into the reversing valve 22, and is discharged from the exhaust port of the reversing valve 22. During this process, the heat stored in the second heat storage body is carried into the furnace 111, and the first heat storage body stores the heat in the exhaust gas.

[0044] In this way, by repeatedly switching the two gas paths through the valve plate 221, the utilization of waste heat can be fully improved. The switching time can be selected when the heat storage body 21 has stored enough heat, that is, when the corresponding heat storage body 21 is unable to store heat in the waste gas.

[0045] The gas delivery component 25 supplies gas to the two burners 23. The gas delivery component 25 includes a gas pipe 251 and gas control valves 252. The gas pipe 251 is a three-way pipe, including a main pipe and two branch pipes connected to one end of the main pipe. The main pipe connects to the gas source, and the two branch pipes are connected to the burner bodies 231 of the two burners 23. There are two gas control valves 252, installed on the two branch pipes, to control the opening and closing of the branch pipes and alternately supply gas to the two burners 23. Specifically, when one gas control valve 252 is open, gas is supplied to the corresponding burner 23, and the other gas control valve 252 is closed. When each burner 23 is in use, air is supplied by a fan 24 and gas is supplied through the corresponding branch pipe. After ignition, the combustion generates hot gas which enters the furnace 111.

[0046] The gas delivery component 25 also includes a gas meter 253, a pressure gauge 254, and a flow valve 255 installed on the main pipe. The gas meter 253 records the amount of gas used, the pressure gauge 254 is used to display the gas pressure entering the gas pipe 251, and the flow valve 255 is used to regulate the gas supply.

[0047] Furthermore, a cover 26 can be provided at the exhaust port of the reversing valve 22 to prevent foreign objects from falling into the exhaust port and to disperse the exhaust gas.

[0048] The heat storage body 21 is made of heat storage bricks with honeycomb structure to form a brick column, which stores the heat of the exhaust gas when it is discharged and preheats the air when it is blown in.

[0049] Furthermore, the bottom surface of the furnace body 11 is provided with wheels to support the furnace body 11 to move on the ground, making it convenient to adjust the position of the furnace.

[0050] The furnace also includes a control system for controlling the operation of the heating mechanism 2, including a control cabinet 31. The control cabinet 31 includes a cabinet body and a circuit board installed inside the cabinet body. The top of the control cabinet 31 is also equipped with a first alarm 32 and a second alarm 33.

[0051] In addition, the control system also monitors any abnormalities that may occur in the furnace; the control cabinet 31 is connected to the monitoring sensor of the leakage monitoring structure to receive the signal sensed by the monitoring sensor. When the monitoring sensor detects leakage, it activates the first alarm 32.

[0052] Understandably, the control system also monitors the furnace temperature; a furnace temperature sensor (not shown) is installed on the furnace body 11 and extends into the furnace chamber 111. The temperature sensor is connected to the control cabinet 31. When the temperature inside the furnace chamber 111 is too high, the control cabinet 31 activates the second alarm 33 to remind the staff to control the temperature of the furnace chamber 111.

[0053] The furnace is also equipped with a reversing sensing mechanism, which includes a reversing temperature sensor installed in the exhaust port of the reversing valve 22. Preferably, it can be installed on the lower surface of the cover 26. The reversing temperature sensor is also connected to the control cabinet 31. The reversing temperature sensor detects the temperature of the exhaust gas and feeds it back to the control cabinet 31. When the exhaust gas temperature at the exhaust port reaches the preset value, the valve plate 221 is rotated to switch the gas path.

[0054] Understandably, the switching of valve plate 221 can also be switched by a preset time.

[0055] Understandably, in Embodiment 1 of this utility model, the burner 23 is a novel structure. By installing the burner body 231 in the lower chamber 212 of the heat storage body 21, the burner body 231 is supplied with gas through a gas source, and air is supplied to the lower chamber 212 by a fan 24 connected to the reversing valve 22. The gas can be ignited at the ignition end of the burner body 231. The air flows to the air guide hole 112, driving the flame to spray into the air guide hole 112, thereby heating the furnace 111. Compared with the traditional burner, which requires an additional combustion fan to supply air to the burner body 231, this method can save the number of fans, simplify the structure, and save costs.

[0056] When using this furnace, the blower 24 blows air into the upper chamber 211 of the first heat storage body, and the gas delivery component 25 delivers gas to the burner 23 corresponding to the first heat storage body. In the lower chamber 212 of the first heat storage body, the ignition nozzle of the burner 23 burns, and the heat generated enters the furnace 111 through the first air guide hole. It flows along the channel between the side wall of the crucible 12 and the inner wall of the furnace 111, uniformly heating the crucible 12. The exhaust gas discharged from the furnace 111 enters the second heat storage body through the second air guide hole. The heat of the exhaust gas is absorbed and stored by the heat storage body 213 of the second heat storage body, and then the exhaust gas is discharged through the exhaust gas discharge port of the reversing valve 22. When the reversing sensing mechanism detects that the temperature of the discharged exhaust gas reaches the set value, the control cabinet 31 controls the corresponding part of the first heat storage body. The gas control valve 252 is closed, and the gas control valve 252 corresponding to the second heat storage body is opened. The air exchange valve 22 is switched to the second gas path state. The fan 24 sends air to the upper chamber 211 of the second heat storage body. The air is preheated by the heat stored in the second heat storage body, which improves the combustion efficiency of the gas. The gas conveying component 25 sends gas to the burner 23 corresponding to the second heat storage body. In the lower chamber 212 of the second heat storage body, the ignition nozzle of the burner 23 burns. The heat generated enters the furnace 111 through the second air guide hole and heats the crucible 12. The exhaust gas enters the first heat storage body from the first air guide hole, and then enters the reversing valve 22 and is discharged from the exhaust port of the reversing valve 22. During this process, the first heat storage body absorbs the heat of the exhaust gas, and so on.

[0057] Example 2

[0058] The burner 23 adopts a traditional burner structure and is installed in the lower chamber 212 of the heat storage body 21. It has a burner body, one end of which is connected to the gas pipe and the air pipe, and the other end is the ignition end. The ignition end forms a mixing chamber facing the air guide hole 112. The gas and air burn in the mixing chamber and are ejected as flames towards the air guide hole 112. In this embodiment 2, the combustion air of the burner 23 does not come from the air supplied by the fan 24, but from the air pipe connected to the burner 23. Understandably, the air pipe is connected to a corresponding combustion fan, and the air supplied by the fan 24 is mainly used to drive the airflow for heat exchange.

[0059] Example 3

[0060] The burner 23 adopts a traditional burner nozzle structure and is not installed in the lower chamber 212 of the heat storage body 21. Both burners 23 are fixedly installed on the peripheral wall of the furnace body 11. Each burner 23 has a burner nozzle body, one end of which is connected to the gas pipe and the air pipe, and the other end is the ignition end, which forms a mixing chamber. The mixing chambers of the ignition ends of the two burners 23 extend into the furnace chamber 111 and face the corresponding air guide holes 112. In this embodiment, the heat storage body 21, the reversing valve 22, and the fan 24 form a heat exchange structure for heat exchange.

[0061] Understandably, of the three embodiments of burner 23, the implementation method in embodiment 1 is preferred, which requires only one fan, saves costs, and facilitates the orientation of the burner 23 flame to be the same as the orientation of the conveying airflow, so that it is sent into the furnace 111.

[0062] In summary, the furnace provided by this utility model has a supporting wall on the bottom surface of the furnace chamber. One end of the supporting wall is connected to the inner wall of the furnace chamber, and the other end forms a gas passage gap with the inner wall of the furnace chamber. Two gas guide holes are opened on the peripheral wall of the furnace body corresponding to the two sides of the supporting wall. The crucible is installed in the furnace chamber, and the top opening of the furnace chamber is closed. The bottom surface of the crucible abuts against the supporting wall, and a gap is formed between the outer peripheral surface of the crucible and the inner peripheral surface of the furnace chamber. One end of the crucible is sealed to the end of the inner wall of the furnace chamber with the gas guide hole. In this way, a looping gas guide channel is separated from the crucible in the furnace chamber by the supporting wall. Gas enters the furnace chamber from one of the gas guide holes, flows along the gas guide channel, and exits from the other gas guide hole. This expands the conduction path and contact area, which can achieve full heating and uniform heating of the crucible, as well as full utilization of heat.

[0063] Furthermore, by setting the heating mechanism outside the furnace and communicating with it, the heating mechanism includes two burners, two heat storage bodies, and a reversing valve. The burners can be set in three different ways: the two burners are installed corresponding to two air guide holes, and the ignition nozzles of the burners extend into the corresponding air guide holes so that the generated heat flows through the furnace along the air guide channel from the corresponding air guide hole and is discharged from the other air guide hole; the two heat storage bodies are set corresponding to two air guide holes, which is beneficial for the heat released by the burner at one air guide hole to be discharged from the other air guide hole and enter the corresponding heat storage body for heat storage. After the reversing valve reverses, the heat stored in the waste gas can be sent back to the furnace for continued use. In this way, the heat utilization rate is greatly improved and energy is saved.

[0064] Understandably, the furnace can be an aluminum melting furnace, an iron melting furnace, a zinc melting furnace, or other smelting furnace used to melt solid metals. In this embodiment, the furnace is preferably a zinc melting furnace used to melt solid zinc.

[0065] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A furnace body structure, comprising a furnace body (11) and a crucible (12), wherein the furnace body (11) has a furnace chamber (111) with a top opening, and the crucible (12) is installed into the furnace chamber (111) through the top opening of the furnace body (11), characterized in that: The bottom surface of the furnace (111) is provided with a support wall (113). One end of the support wall (113) is connected to the inner wall of the furnace (111), and the other end extends to the other end of the furnace (111), forming an air passage gap (110) with the inner wall of the furnace (111) at the other end. Two air guide holes (112) are opened on the peripheral wall of the furnace body (11) at the connection point with the support wall (113), and the two air guide holes (112) are located on both sides of the support wall (113); The crucible (12) is installed inside the furnace chamber (111) to seal the opening at the top of the furnace chamber (111). The bottom surface of the crucible (12) abuts against the support wall (113). There is a gap between the outer circumferential surface of the crucible (12) and the inner circumferential surface of the furnace chamber (111), and it is sealed to one end of the inner wall of the furnace body (11) with a gas guide hole (112). A looping gas channel is separated from the crucible (12) by a support wall (113) inside the furnace (111). Hot gas entering the furnace (111) through one of the gas guide holes (112) flows along the gas guide channel, enters the crucible (12) from one side and exits from the other gas guide hole (112).

2. The furnace structure according to claim 1, characterized in that The support wall (113) is connected to the top surface of one end of the inner wall of the furnace (111) and a partition wall is provided. The partition wall connects the inner wall of the furnace (111) and the periphery of the crucible (12), and extends upward to the top opening end of the furnace (111). The partition wall isolates the two air guide holes (112) in the vicinity of the furnace (111) and prevents the airflow between the two air guide holes (112) in the vicinity of the furnace (111).

3. The furnace body structure according to claim 1, characterized in that, The furnace body (11) is provided with a leakage detection structure. The leakage detection structure includes a drain pipe (114) set on the side wall of the furnace body (11) and a monitoring sensor installed in the drain pipe (114). One end of the drain pipe (114) passes through the side wall of the furnace chamber (111) and extends to the bottom surface of the furnace chamber (111), and the other end extends out of the furnace body (11).

4. The furnace body structure according to claim 1, characterized in that, The top of the outer peripheral wall of the crucible (12) has a horizontally extending rim (121) which is used to seal and press against the top opening of the furnace (111).

5. A furnace, characterized in that: The furnace includes the furnace body structure (1) as described in any one of claims 1-4, and a heating mechanism (2) installed on the outer periphery of the furnace body (11). The heating mechanism (2) includes two burners (23), two heat storage bodies (21), a reversing valve (22), and a fan (24). The two burners (23) are respectively installed corresponding to two air guide holes (112). The ignition nozzle of each burner (23) extends into the corresponding air guide hole (112) so that the generated heat flows from the corresponding air guide hole (112) along the air guide channel through the furnace chamber (111). The exhaust gas is discharged from another air vent (112); two heat storage bodies (21) are respectively set corresponding to the two air vents (112), and the bottom end of the heat storage body (21) is connected to the air vent (112) so that the exhaust gas discharged from the air vent (112) can be stored in the corresponding heat storage body (21). The reversing valve (22) includes four valve ports, three of which are connected to the top of the two heat storage bodies (21) and the fan (24) respectively. After the reversing valve (22) is reversed, the heat stored in the exhaust gas is sent back to the furnace (111) for use by the fan (24).

6. The furnace according to claim 5, characterized in that, The heat storage body (21) has an upper chamber (211) at its upper end and a lower chamber (212) at its lower end. The lower chamber (212) has a through hole on its wall that is aligned with and connected to the air guide hole (112). The reversing valve (22) is a four-way valve with a valve plate (221) inside. The two opposite valve ports of the reversing valve (22) are connected to the upper chambers (211) at the upper ends of the two heat storage bodies (21). The third valve port is connected to the fan (24), and the fourth valve port is the exhaust port for discharging exhaust gas.

7. The furnace according to claim 6, characterized in that, The heating mechanism (2) includes a gas delivery component (25), and a burner (23) is installed in the lower chamber (212) of the heat storage body (21). The burner (23) includes a burner body (231) and an ignition nozzle installed at one end of the burner body (231). The ignition nozzle faces the gas guide hole (112), and the burner body (231) is connected to the gas delivery component (25).

8. The furnace according to claim 7, characterized in that, The gas delivery component (25) includes a gas pipe (251) and a gas control valve (252). The gas pipe (251) is a three-way pipe, including a main pipe and two branch pipes connected to one end of the main pipe. The main pipe is connected to the gas source, and the two branch pipes are connected to the burner bodies (231) of the two burners (23). There are two gas control valves (252), which are installed on the two branch pipes to control the opening and closing of the branch pipes.

9. The furnace according to claim 6, characterized in that, The burner (23) is installed in the lower chamber (212) of the heat storage body (21). The burner (23) includes a burner body (231). One end of the burner body (231) is connected to the gas pipe and the air pipe, and the other end is the ignition end. The ignition end forms a mixing chamber. The mixing chamber faces the air guide hole (112) so that the gas and air can be burned in the mixing chamber and sprayed out as flames towards the air guide hole (112).

10. The furnace according to claim 6, characterized in that, The burner (23) is fixedly installed on the peripheral wall of the furnace body (11). The burner (23) includes a burner body (231). One end of the burner body (231) is connected to the gas pipe and the air pipe, and the other end is the ignition end. The ignition end forms a mixing chamber, which extends into the furnace chamber (111) and faces the corresponding air guide hole (112).

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