Hot-blast stove electric heating device for dryer

Abstract

The utility model provides a hot-blast stove electric heating device for a drying machine, which belongs to the technical field of hot-blast stoves and comprises a hot-blast pipeline arranged at the air outlet end of a drying box body, an air blower arranged at the air inlet end of the drying box body, a sealing cover arranged at the top of the drying box body, a connecting plate arranged at the top in the sealing cover and a plurality of binding posts arranged at the bottom of the connecting plate. The bottom of each binding post is provided with an electric heating pipe, a plurality of heat conduction jackets are arranged between the electric heating pipes, the top of the drying box body is provided with a positioning groove, and the middle part of the sealing cover is provided with a sealing frame. The electric heating pipe in the drying box body generates heat energy, then the heat energy in the drying box body is blown into the hot air pipeline through the air blower, heat supply to the drying machine is achieved, and therefore the drying box can be applied to the working environment with the high environmental protection requirement, and the safety risk of flammable and explosive explosion is reduced.

Description

Technical Field

[0001] This utility model relates to the field of hot air furnace technology, specifically to an electric heating device for a hot air furnace used in a dryer. Background Technology

[0002] A hot air furnace is a device used to generate hot air, commonly used for heating and drying operations in industrial production processes. Traditional hot air furnaces mostly use natural gas.

[0003] In some related technologies, hot air furnaces are used by connecting one end of the furnace body to a combustion and air supply device. The combustion of fuel (such as natural gas, coal, or oil) generates a high-temperature flame and combustion products. This heat energy is transferred to the air inside the furnace, heating it into high-temperature hot air. This hot air is then sent into the hot air duct of a dryer, directly contacting the high-humidity materials. Through heat transfer, the moisture in the materials evaporates, thus achieving the drying process. This allows for rapid temperature increases in the hot air duct.

[0004] However, gas heating equipment releases exhaust gas during combustion, which is detrimental to environmental protection when operating in environments with high environmental requirements. This necessitates the installation of specialized exhaust gas treatment equipment, thereby increasing costs. Furthermore, the working environment contains flammable and explosive materials, posing significant safety risks. To address these issues, an electric heating device for a hot air furnace in a dryer is proposed. Utility Model Content

[0005] In view of this, the present invention provides an electric heating device for a hot air furnace in a dryer. The present invention is connected to a power source via a connecting plate, thereby supplying power to the terminal block, which in turn activates the electric heating tube connected to the terminal block. This causes the electric heating tube inside the drying chamber to generate heat energy, which is then blown into the hot air duct by a blower, thereby heating the dryer. This allows it to be used in working environments with high environmental protection requirements and also reduces the safety risks of flammability and explosion.

[0006] To solve the above-mentioned technical problems, this utility model provides an electric heating device for a hot air furnace in a dryer, including a hot air duct at the air outlet of the drying chamber, a blower at the air inlet of the drying chamber, a sealing cover at the top of the drying chamber, a connecting plate at the top inside the sealing cover, multiple terminals at the bottom of the connecting plate, an electric heating tube at the bottom of each terminal, multiple heat-conducting jackets between the electric heating tubes along the direction of the terminals, a positioning groove at the top of the drying chamber, and a sealing frame in the middle of the sealing cover.

[0007] An insulation board is installed at both the front and rear ends of the connecting plate. The insulation board is used to reduce the heat loss from the top of the drying chamber. The insulation board is connected to the top wall inside the sealing cover.

[0008] The positioning groove fits precisely with the bottom of the sealing cover. A pair of positioning plates are provided at each of the front and rear ends of the outer wall of the sealing cover. The positioning plates are used to connect the sealing cover and the positioning groove, thereby sealing and fixing the sealing cover to the top of the drying chamber. The positioning plates are provided with multiple threaded holes for installing bolts. The threaded holes pass through the positioning plates and are embedded in the solid area of ​​the positioning groove.

[0009] The depth of the groove in the positioning slot is consistent with the length of the sealing cover below the sealing frame. A handle is provided on both the left and right sides of the sealing cover. The handle is used to facilitate the separation of the sealing cover from the drying chamber. The handle is welded and fixed to the outer wall of the sealing cover.

[0010] The air outlet of the drying chamber is connected to a first reducing connector, which is used to connect the drying chamber to the ventilation flange. The first reducing connector is used to connect hot air ducts of different sizes. The air outlet of the first reducing connector is equipped with a ventilation flange, which is used to connect the first reducing connector to the hot air duct. The air outlet of the ventilation flange is connected to the air inlet of the hot air duct.

[0011] The air inlet of the drying chamber is connected to a second reducing connector, which is used to connect air outlet ducts of different sizes. The air inlet of the second reducing connector is connected to the air outlet duct on the blower.

[0012] The surface of the hot air duct is equipped with an insulation cylinder, which is used to reduce the heat dissipation rate of the hot air duct. The size of the insulation cylinder is larger than that of the hot air duct. A pair of hanging ears are provided on the top of the insulation cylinder, which facilitates the hoisting and transfer of the insulation cylinder and the hot air duct by transport tools. A pair of first supports are provided at the bottom of the insulation cylinder, which are used to support the insulation cylinder. A second support is provided at the bottom of the blower, which is used to support the blower.

[0013] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0014] 1. The connection plate is connected to the power supply to supply power to the terminal block, which in turn starts the electric heating tube connected to the terminal block. This causes the electric heating tube inside the drying chamber to generate heat energy, which is then blown into the hot air duct by the blower, thus heating the dryer. This allows it to be used in working environments with high environmental protection requirements and also reduces the safety risks of flammability and explosion.

[0015] 2. By using insulation cylinders to reduce the rate of heat dissipation from the hot air duct, the outlet air temperature of the hot air duct is maintained, thereby stabilizing the heating quality.

[0016] 3. When it is necessary to disassemble the drying chamber to maintain the electric heating tube, remove the bolts in the threaded holes on the positioning plate and positioning groove to separate the sealing cover from the drying chamber. Then, take out the connecting plate, terminal block and electric heating tube at the top of the sealing cover, and then perform maintenance and upkeep using professional tools. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 For this utility model Figure 1 A magnified view of part A;

[0019] Figure 3 This is a side view of the structure of this utility model;

[0020] Figure 4 This is a side sectional view of the present invention;

[0021] Figure 5 For this utility model Figure 4 A magnified view of part B;

[0022] Figure 6 This is a front sectional view of the present invention.

[0023] Explanation of reference numerals in the attached drawings: 100, Drying chamber; 101, Hot air duct; 102, Blower; 103, Insulation board; 104, First reducing fitting; 105, Ventilation flange; 106, Second reducing fitting; 200, Sealing cap; 201, Connecting plate; 202, Terminal block; 203, Electric heating element; 204, Heat-conducting jacket; 300, Positioning groove; 301, Sealing frame; 302, Positioning plate; 303, Threaded hole; 304, Handle; 400, Insulation cylinder; 401, Hanging lug; 402, First support; 403, Second support. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-6 The technical solutions of the embodiments of this utility model are clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0025] like Figure 1-6As shown: This embodiment provides an electric heating device for a hot air furnace in a dryer, including a hot air duct 101 installed at the air outlet of a drying chamber 100, which transports the heat generated inside the drying chamber 100 to the dryer. A blower 102 is installed at the air inlet of the drying chamber 100, which blows the heat generated inside the drying chamber 100 into the hot air duct 101. A sealing cover 200 is installed on the top of the drying chamber 100, which seals the top of the drying chamber 100 and also opens and closes the drying chamber 100, facilitating the inspection or maintenance of the electric heating element 203. A connecting plate 201 is installed at the top inside the sealing cover 201, which connects the terminals 202 to an external power source. Multiple terminals 202 are installed at the bottom of the connecting plate 201. The terminal block 202 is used to connect the connecting plate 201 and the electric heating tube 203. Each terminal block 202 has an electric heating tube 203 at its bottom. The electric heating tube 203 is used to generate heat. The electric heating tube 203 is composed of components such as heating wire, lead wire, tube shell, insulation layer, and magnesium oxide powder. Multiple heat-conducting jackets 204 are arranged between the electric heating tubes 203 along the direction of the terminal block 202. The heat-conducting jackets 204 are used to increase the heat generation area. The top of the drying chamber 100 is provided with a positioning groove 300, which is used to receive the sealing cover 200. The sealing cover 200 is provided with a sealing frame 301 in the middle. The sealing frame 301 is used to reinforce and protect the external gap after the drying chamber 100 is connected to the sealing cover 200. A thermal sensor can be added inside the hot air duct 101 to detect the temperature inside the hot air duct 101 and thus adjust the heat supply.

[0026] In use, the connection plate 201 is connected to the power supply to supply power to the terminal 202, which in turn activates the electric heating tube 203 connected to the terminal 202. This causes the electric heating tube 203 inside the drying chamber 100 to generate heat energy, which is then blown into the hot air duct 101 by the blower 102, thereby providing heat to the dryer.

[0027] This embodiment provides an electric heating device for a hot air furnace in a dryer.

[0028] like Figure 4 , 5 As shown in Figure 6: A heat insulation plate 103 is provided at both the front and rear ends of the connecting plate 201. The heat insulation plate 103 is fixed to the top of the sealing cover 200 with bolts. The heat insulation plate 103 is used to reduce the heat loss from the top of the drying chamber 100 too quickly. The heat insulation plate 103 is connected to the top wall inside the sealing cover 200.

[0029] Its effect is as follows: the insulation board 103 is used to reduce the heat loss at the top of the drying chamber 100 too quickly, thereby maintaining the temperature inside the drying chamber 100.

[0030] like Figure 1 , 2 As shown in Figures 4 and 5: The positioning groove 300 is precisely fitted to the bottom of the sealing cover 200. A pair of positioning plates 302 are provided at each of the front and rear ends of the outer wall of the sealing cover 200. The positioning plates 302 are made of steel plate and are welded and fixed to the outer wall of the sealing cover 200. The positioning plates 302 are used to connect the sealing cover 200 and the positioning groove 300, thereby sealing and fixing the sealing cover 200 to the top of the drying chamber 100. Multiple threaded holes 303 are provided in the positioning plate 302. The threaded holes 303 are used to install bolts. The threaded holes 303 pass through the positioning plate 302 and are embedded in the solid area of ​​the positioning groove 300. Bolts are provided in the threaded holes 303.

[0031] The effect is as follows: after the bolt passes through the threaded hole 303 on the positioning plate 302, it is fixed to the threaded hole 303 on the positioning groove 300. Simultaneously, the sealing cover 200 at the bottom of the sealing frame 301 is inserted into the groove of the positioning groove 300, so that the positioning groove 300 corresponds to the sealing cover 200, thereby making the bottom of the drying chamber 100 and the sealing cover 200 sealed and fixed. The internal insulation plate 103 reinforces the internal sealing of the connection gap, and the sealing frame 301 seals the external of the connection gap.

[0032] like Figure 1 , 3 As shown in Figures 4 and 6: The depth of the groove in the positioning groove 300 is consistent with the length of the sealing cover 200 below the sealing frame 301. A handle 304 is provided on both the left and right sides of the sealing cover 200. The handle 304 is square in shape and the surface of the handle 304 can be covered with a heat insulation sleeve. The handle 304 is used to facilitate the separation between the sealing cover 200 and the drying chamber 100. The handle 304 is welded and fixed to the outer wall of the sealing cover 200.

[0033] Its function is as follows: when it is necessary to remove the sealing cover 200, the handle 304 is used to facilitate the separation between the sealing cover 200 and the drying chamber 100.

[0034] like Figure 1 , 3As shown in Figure 4: A first reducing connector 104 is connected to the air outlet end of the drying chamber 100. One end of the first reducing connector 104 is welded and fixed to the air outlet end of the drying chamber 100. The first reducing connector 104 is composed of a square ventilation pipe and a round ventilation pipe welded together. The first reducing connector 104 is used for communication between the drying chamber 100 and the ventilation flange 105. The first reducing connector 104 is used to connect hot air pipes 101 of different sizes. A ventilation flange 105 is provided at the air outlet end of the first reducing connector 104. The first reducing connector 104 and the ventilation flange 105 are connected by bolts for sealing. The ventilation flange 105 is used for the first reducing connector. The connection between 104 and hot air duct 101 is as follows: the air outlet of ventilation flange 105 is connected to the air inlet of hot air duct 101; ventilation flange 105 and hot air duct 101 are connected by bolts for sealing; a second reducer 106 is provided at the air inlet of drying chamber 100; the second reducer 106 is composed of square ventilation pipe and round ventilation pipe welded together; the second reducer 106 is used to connect air outlet ducts of different sizes; the air inlet of the second reducer 106 is sealed and connected to the air outlet duct on blower 102 through ventilation flange 105; and the second reducer 106 is welded and connected to the air inlet of drying chamber 100.

[0035] Its effects are as follows: the first reducing connector 104 is used to connect the drying chamber 100 and the ventilation flange 105, thereby connecting the first reducing connector 104 to the hot air duct 101, thereby connecting the drying chamber 100 to the hot air duct 101; the second reducing connector 106 is used to connect air outlet ducts of different sizes, thereby connecting the drying chamber 100 to the air outlet duct on the blower 102.

[0036] like Figure 1 , 3 As shown in Figure 4: A heat insulation cylinder 400 is provided on the surface of the hot air duct 101. The heat insulation cylinder 400 is used to reduce the heat dissipation rate of the hot air duct 101. The heat insulation cylinder 400 is welded and fixed to the outer surface of the air inlet pipe of the hot air duct 101. The size of the heat insulation cylinder 400 is larger than the size of the hot air duct 101. A pair of hanging ears 401 are provided on the top of the heat insulation cylinder 400. The hanging ears 401 are welded and fixed to the outer wall of the heat insulation cylinder 400. The inner wall of the heat insulation cylinder 400 can be lined with a refractory mud layer. A pair of first supports 402 are provided at the bottom of the heat insulation cylinder 402. The top of the first supports 402 is provided with a U-shaped groove. The first supports 402 are fixed to the bottom of the heat insulation cylinder 400. The first supports 402 are used to support the heat insulation cylinder 400. A second support 403 is provided at the bottom of the blower 102. The second support 403 is used to support the blower 102. The second support 403 is fixed to the base of the blower 102 with bolts.

[0037] Its effects are as follows: the insulation cylinder 400 is used to reduce the heat dissipation rate of the hot air duct 101, thereby maintaining the outlet air temperature of the hot air duct 101 and stabilizing the heating quality; the lugs 401 facilitate the hoisting and transfer of the insulation cylinder 400 and the hot air duct 101 by transport tools.

[0038] Working principle: The connecting plate 201 is connected to the power supply, thereby supplying power to the terminal 202, which in turn activates the electric heating tube 203 connected to the terminal 202. This causes the electric heating tube 203 inside the drying chamber 100 to generate heat energy, which is then blown into the hot air duct 101 by the blower 102, thus providing heat to the dryer. The heat dissipation rate of the hot air duct 101 is reduced by the insulation cylinder 400, thereby maintaining the outlet air temperature of the hot air duct 101 and stabilizing the heating quality. When it is necessary to disassemble the drying chamber 100 to maintain the electric heating tube 203, the bolts in the threaded holes 303 on the positioning plate 302 and the positioning groove 300 are removed, thereby separating the sealing cover 200 from the drying chamber 100. The connecting plate 201, terminal 202, and electric heating tube 203 at the top of the sealing cover 200 can then be removed and maintained using professional tools.

[0039] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An electric heating device for a hot air furnace in a dryer, comprising a hot air duct (101) disposed at the air outlet of a drying chamber (100), and a blower (102) disposed at the air inlet of the drying chamber (100), characterized in that: The drying chamber (100) is provided with a sealing cover (200) on the top. A connecting plate (201) is provided inside the top of the sealing cover (200). Multiple terminals (202) are provided at the bottom of the connecting plate (201). An electric heating tube (203) is provided at the bottom of each terminal (202). Multiple heat-conducting jackets (204) are provided between the electric heating tubes (203) along the direction of the terminal (202). A positioning groove (300) is provided on the top of the drying chamber (100). A sealing frame (301) is provided in the middle of the sealing cover (200).

2. The electric heating device for a hot air furnace in a dryer as described in claim 1, characterized in that: An insulation board (103) is provided at both the front and rear ends of the connecting plate (201), and the insulation board (103) is connected to the top wall inside the sealing cover (200).

3. The electric heating device for a hot air furnace in a dryer as described in claim 2, characterized in that: The positioning groove (300) is precisely fitted to the bottom of the sealing cover (200). A pair of positioning plates (302) are provided at each of the front and rear ends of the outer wall of the sealing cover (200). Multiple threaded holes (303) are provided in the positioning plate (302). The threaded holes (303) pass through the positioning plate (302) and are embedded in the solid area of ​​the positioning groove (300).

4. The electric heating device for a hot air furnace in a dryer as described in claim 3, characterized in that: The depth of the groove in the positioning groove (300) is the same as the length of the sealing cover (200) below the sealing frame (301), and a handle (304) is provided on both the left and right sides of the sealing cover (200).

5. The electric heating device for a hot air furnace in a dryer as described in claim 4, characterized in that: The air outlet of the drying chamber (100) is connected to a first reducing connector (104), and the air outlet of the first reducing connector (104) is provided with a ventilation flange (105). The air outlet of the ventilation flange (105) is connected to the air inlet of the hot air duct (101).

6. The electric heating device for a hot air furnace in a dryer as described in claim 5, characterized in that: The air inlet of the drying chamber (100) is connected to a second reducing connector (106), and the air inlet of the second reducing connector (106) is connected to the air outlet pipe on the blower (102).

7. The electric heating device for a hot air furnace in a dryer as described in claim 6, characterized in that: The surface of the hot air duct (101) is provided with an insulation cylinder (400), the size of the insulation cylinder (400) is larger than the size of the hot air duct (101), a pair of hanging ears (401) are provided on the top of the insulation cylinder (400), a pair of first supports (402) are provided on the bottom of the insulation cylinder (400), and a second support (403) is provided on the bottom of the blower (102).

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